/usr/src/gnu/usr.bin/clang/libclangCodeGen/../../../llvm/clang/lib/CodeGen/CGOpenMPRuntime.cpp

Bug Summary

File:	src/gnu/usr.bin/clang/libclangCodeGen/../../../llvm/clang/lib/CodeGen/CGOpenMPRuntime.cpp
Warning:	line 11506, column 58 Division by zero

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name CGOpenMPRuntime.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model static -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/gnu/usr.bin/clang/libclangCodeGen/obj -resource-dir /usr/local/lib/clang/13.0.0 -I /usr/src/gnu/usr.bin/clang/libclangCodeGen/../../../llvm/clang/include -I /usr/src/gnu/usr.bin/clang/libclangCodeGen/../../../llvm/llvm/include -I /usr/src/gnu/usr.bin/clang/libclangCodeGen/../include -I /usr/src/gnu/usr.bin/clang/libclangCodeGen/obj -I /usr/src/gnu/usr.bin/clang/libclangCodeGen/obj/../include -D NDEBUG -D __STDC_LIMIT_MACROS -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D LLVM_PREFIX="/usr" -internal-isystem /usr/include/c++/v1 -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/usr/src/gnu/usr.bin/clang/libclangCodeGen/obj -ferror-limit 19 -fvisibility-inlines-hidden -fwrapv -stack-protector 2 -fno-rtti -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c++ /usr/src/gnu/usr.bin/clang/libclangCodeGen/../../../llvm/clang/lib/CodeGen/CGOpenMPRuntime.cpp

/usr/src/gnu/usr.bin/clang/libclangCodeGen/../../../llvm/clang/lib/CodeGen/CGOpenMPRuntime.cpp

→

1//===----- CGOpenMPRuntime.cpp - Interface to OpenMP Runtimes -------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This provides a class for OpenMP runtime code generation.
10//
11//===----------------------------------------------------------------------===//

13#include "CGOpenMPRuntime.h"
14#include "CGCXXABI.h"
15#include "CGCleanup.h"
16#include "CGRecordLayout.h"
17#include "CodeGenFunction.h"
18#include "clang/AST/APValue.h"
19#include "clang/AST/Attr.h"
20#include "clang/AST/Decl.h"
21#include "clang/AST/OpenMPClause.h"
22#include "clang/AST/StmtOpenMP.h"
23#include "clang/AST/StmtVisitor.h"
24#include "clang/Basic/BitmaskEnum.h"
25#include "clang/Basic/FileManager.h"
26#include "clang/Basic/OpenMPKinds.h"
27#include "clang/Basic/SourceManager.h"
28#include "clang/CodeGen/ConstantInitBuilder.h"
29#include "llvm/ADT/ArrayRef.h"
30#include "llvm/ADT/SetOperations.h"
31#include "llvm/ADT/StringExtras.h"
32#include "llvm/Bitcode/BitcodeReader.h"
33#include "llvm/IR/Constants.h"
34#include "llvm/IR/DerivedTypes.h"
35#include "llvm/IR/GlobalValue.h"
36#include "llvm/IR/Value.h"
37#include "llvm/Support/AtomicOrdering.h"
38#include "llvm/Support/Format.h"
39#include "llvm/Support/raw_ostream.h"
40#include <cassert>
41#include <numeric>

43using namespace clang;
44using namespace CodeGen;
45using namespace llvm::omp;

47namespace {
48/// Base class for handling code generation inside OpenMP regions.
49class CGOpenMPRegionInfo : public CodeGenFunction::CGCapturedStmtInfo {
50public:
/// Kinds of OpenMP regions used in codegen.
enum CGOpenMPRegionKind {
  /// Region with outlined function for standalone 'parallel'
  /// directive.
  ParallelOutlinedRegion,
  /// Region with outlined function for standalone 'task' directive.
  TaskOutlinedRegion,
  /// Region for constructs that do not require function outlining,
  /// like 'for', 'sections', 'atomic' etc. directives.
  InlinedRegion,
  /// Region with outlined function for standalone 'target' directive.
  TargetRegion,
};

CGOpenMPRegionInfo(const CapturedStmt &CS,
                   const CGOpenMPRegionKind RegionKind,
                   const RegionCodeGenTy &CodeGen, OpenMPDirectiveKind Kind,
                   bool HasCancel)
    : CGCapturedStmtInfo(CS, CR_OpenMP), RegionKind(RegionKind),
      CodeGen(CodeGen), Kind(Kind), HasCancel(HasCancel) {}

CGOpenMPRegionInfo(const CGOpenMPRegionKind RegionKind,
                   const RegionCodeGenTy &CodeGen, OpenMPDirectiveKind Kind,
                   bool HasCancel)
    : CGCapturedStmtInfo(CR_OpenMP), RegionKind(RegionKind), CodeGen(CodeGen),
      Kind(Kind), HasCancel(HasCancel) {}

/// Get a variable or parameter for storing global thread id
/// inside OpenMP construct.
virtual const VarDecl *getThreadIDVariable() const = 0;

/// Emit the captured statement body.
void EmitBody(CodeGenFunction &CGF, const Stmt *S) override;

/// Get an LValue for the current ThreadID variable.
/// \return LValue for thread id variable. This LValue always has type int32*.
virtual LValue getThreadIDVariableLValue(CodeGenFunction &CGF);

virtual void emitUntiedSwitch(CodeGenFunction & /*CGF*/) {}

CGOpenMPRegionKind getRegionKind() const { return RegionKind; }

OpenMPDirectiveKind getDirectiveKind() const { return Kind; }

bool hasCancel() const { return HasCancel; }

static bool classof(const CGCapturedStmtInfo *Info) {
  return Info->getKind() == CR_OpenMP;
}

~CGOpenMPRegionInfo() override = default;

103protected:
CGOpenMPRegionKind RegionKind;
RegionCodeGenTy CodeGen;
OpenMPDirectiveKind Kind;
bool HasCancel;
108};

110/// API for captured statement code generation in OpenMP constructs.
111class CGOpenMPOutlinedRegionInfo final : public CGOpenMPRegionInfo {
112public:
CGOpenMPOutlinedRegionInfo(const CapturedStmt &CS, const VarDecl *ThreadIDVar,
                           const RegionCodeGenTy &CodeGen,
                           OpenMPDirectiveKind Kind, bool HasCancel,
                           StringRef HelperName)
    : CGOpenMPRegionInfo(CS, ParallelOutlinedRegion, CodeGen, Kind,
                         HasCancel),
      ThreadIDVar(ThreadIDVar), HelperName(HelperName) {
  assert(ThreadIDVar != nullptr && "No ThreadID in OpenMP region.")((void)0);
}

/// Get a variable or parameter for storing global thread id
/// inside OpenMP construct.
const VarDecl *getThreadIDVariable() const override { return ThreadIDVar; }

/// Get the name of the capture helper.
StringRef getHelperName() const override { return HelperName; }

static bool classof(const CGCapturedStmtInfo *Info) {
  return CGOpenMPRegionInfo::classof(Info) &&
         cast<CGOpenMPRegionInfo>(Info)->getRegionKind() ==
             ParallelOutlinedRegion;
}

136private:
/// A variable or parameter storing global thread id for OpenMP
/// constructs.
const VarDecl *ThreadIDVar;
StringRef HelperName;
141};

143/// API for captured statement code generation in OpenMP constructs.
144class CGOpenMPTaskOutlinedRegionInfo final : public CGOpenMPRegionInfo {
145public:
class UntiedTaskActionTy final : public PrePostActionTy {
  bool Untied;
  const VarDecl *PartIDVar;
  const RegionCodeGenTy UntiedCodeGen;
  llvm::SwitchInst *UntiedSwitch = nullptr;

public:
  UntiedTaskActionTy(bool Tied, const VarDecl *PartIDVar,
                     const RegionCodeGenTy &UntiedCodeGen)
      : Untied(!Tied), PartIDVar(PartIDVar), UntiedCodeGen(UntiedCodeGen) {}
  void Enter(CodeGenFunction &CGF) override {
    if (Untied) {
      // Emit task switching point.
      LValue PartIdLVal = CGF.EmitLoadOfPointerLValue(
          CGF.GetAddrOfLocalVar(PartIDVar),
          PartIDVar->getType()->castAs<PointerType>());
      llvm::Value *Res =
          CGF.EmitLoadOfScalar(PartIdLVal, PartIDVar->getLocation());
      llvm::BasicBlock *DoneBB = CGF.createBasicBlock(".untied.done.");
      UntiedSwitch = CGF.Builder.CreateSwitch(Res, DoneBB);
      CGF.EmitBlock(DoneBB);
      CGF.EmitBranchThroughCleanup(CGF.ReturnBlock);
      CGF.EmitBlock(CGF.createBasicBlock(".untied.jmp."));
      UntiedSwitch->addCase(CGF.Builder.getInt32(0),
                            CGF.Builder.GetInsertBlock());
      emitUntiedSwitch(CGF);
    }
  }
  void emitUntiedSwitch(CodeGenFunction &CGF) const {
    if (Untied) {
      LValue PartIdLVal = CGF.EmitLoadOfPointerLValue(
          CGF.GetAddrOfLocalVar(PartIDVar),
          PartIDVar->getType()->castAs<PointerType>());
      CGF.EmitStoreOfScalar(CGF.Builder.getInt32(UntiedSwitch->getNumCases()),
                            PartIdLVal);
      UntiedCodeGen(CGF);
      CodeGenFunction::JumpDest CurPoint =
          CGF.getJumpDestInCurrentScope(".untied.next.");
      CGF.EmitBranch(CGF.ReturnBlock.getBlock());
      CGF.EmitBlock(CGF.createBasicBlock(".untied.jmp."));
      UntiedSwitch->addCase(CGF.Builder.getInt32(UntiedSwitch->getNumCases()),
                            CGF.Builder.GetInsertBlock());
      CGF.EmitBranchThroughCleanup(CurPoint);
      CGF.EmitBlock(CurPoint.getBlock());
    }
  }
  unsigned getNumberOfParts() const { return UntiedSwitch->getNumCases(); }
};
CGOpenMPTaskOutlinedRegionInfo(const CapturedStmt &CS,
                               const VarDecl *ThreadIDVar,
                               const RegionCodeGenTy &CodeGen,
                               OpenMPDirectiveKind Kind, bool HasCancel,
                               const UntiedTaskActionTy &Action)
    : CGOpenMPRegionInfo(CS, TaskOutlinedRegion, CodeGen, Kind, HasCancel),
      ThreadIDVar(ThreadIDVar), Action(Action) {
  assert(ThreadIDVar != nullptr && "No ThreadID in OpenMP region.")((void)0);
}

/// Get a variable or parameter for storing global thread id
/// inside OpenMP construct.
const VarDecl *getThreadIDVariable() const override { return ThreadIDVar; }

/// Get an LValue for the current ThreadID variable.
LValue getThreadIDVariableLValue(CodeGenFunction &CGF) override;

/// Get the name of the capture helper.
StringRef getHelperName() const override { return ".omp_outlined."; }

void emitUntiedSwitch(CodeGenFunction &CGF) override {
  Action.emitUntiedSwitch(CGF);
}

static bool classof(const CGCapturedStmtInfo *Info) {
  return CGOpenMPRegionInfo::classof(Info) &&
         cast<CGOpenMPRegionInfo>(Info)->getRegionKind() ==
             TaskOutlinedRegion;
}

224private:
/// A variable or parameter storing global thread id for OpenMP
/// constructs.
const VarDecl *ThreadIDVar;
/// Action for emitting code for untied tasks.
const UntiedTaskActionTy &Action;
230};

232/// API for inlined captured statement code generation in OpenMP
233/// constructs.
234class CGOpenMPInlinedRegionInfo : public CGOpenMPRegionInfo {
235public:
CGOpenMPInlinedRegionInfo(CodeGenFunction::CGCapturedStmtInfo *OldCSI,
                          const RegionCodeGenTy &CodeGen,
                          OpenMPDirectiveKind Kind, bool HasCancel)
    : CGOpenMPRegionInfo(InlinedRegion, CodeGen, Kind, HasCancel),
      OldCSI(OldCSI),
      OuterRegionInfo(dyn_cast_or_null<CGOpenMPRegionInfo>(OldCSI)) {}

// Retrieve the value of the context parameter.
llvm::Value *getContextValue() const override {
  if (OuterRegionInfo)
    return OuterRegionInfo->getContextValue();
  llvm_unreachable("No context value for inlined OpenMP region")__builtin_unreachable();
}

void setContextValue(llvm::Value *V) override {
  if (OuterRegionInfo) {
    OuterRegionInfo->setContextValue(V);
    return;
  }
  llvm_unreachable("No context value for inlined OpenMP region")__builtin_unreachable();
}

/// Lookup the captured field decl for a variable.
const FieldDecl *lookup(const VarDecl *VD) const override {
  if (OuterRegionInfo)
    return OuterRegionInfo->lookup(VD);
  // If there is no outer outlined region,no need to lookup in a list of
  // captured variables, we can use the original one.
  return nullptr;
}

FieldDecl *getThisFieldDecl() const override {
  if (OuterRegionInfo)
    return OuterRegionInfo->getThisFieldDecl();
  return nullptr;
}

/// Get a variable or parameter for storing global thread id
/// inside OpenMP construct.
const VarDecl *getThreadIDVariable() const override {
  if (OuterRegionInfo)
    return OuterRegionInfo->getThreadIDVariable();
  return nullptr;
}

/// Get an LValue for the current ThreadID variable.
LValue getThreadIDVariableLValue(CodeGenFunction &CGF) override {
  if (OuterRegionInfo)
    return OuterRegionInfo->getThreadIDVariableLValue(CGF);
  llvm_unreachable("No LValue for inlined OpenMP construct")__builtin_unreachable();
}

/// Get the name of the capture helper.
StringRef getHelperName() const override {
  if (auto *OuterRegionInfo = getOldCSI())
    return OuterRegionInfo->getHelperName();
  llvm_unreachable("No helper name for inlined OpenMP construct")__builtin_unreachable();
}

void emitUntiedSwitch(CodeGenFunction &CGF) override {
  if (OuterRegionInfo)
    OuterRegionInfo->emitUntiedSwitch(CGF);
}

CodeGenFunction::CGCapturedStmtInfo *getOldCSI() const { return OldCSI; }

static bool classof(const CGCapturedStmtInfo *Info) {
  return CGOpenMPRegionInfo::classof(Info) &&
         cast<CGOpenMPRegionInfo>(Info)->getRegionKind() == InlinedRegion;
}

~CGOpenMPInlinedRegionInfo() override = default;

309private:
/// CodeGen info about outer OpenMP region.
CodeGenFunction::CGCapturedStmtInfo *OldCSI;
CGOpenMPRegionInfo *OuterRegionInfo;
313};

315/// API for captured statement code generation in OpenMP target
316/// constructs. For this captures, implicit parameters are used instead of the
317/// captured fields. The name of the target region has to be unique in a given
318/// application so it is provided by the client, because only the client has
319/// the information to generate that.
320class CGOpenMPTargetRegionInfo final : public CGOpenMPRegionInfo {
321public:
CGOpenMPTargetRegionInfo(const CapturedStmt &CS,
                         const RegionCodeGenTy &CodeGen, StringRef HelperName)
    : CGOpenMPRegionInfo(CS, TargetRegion, CodeGen, OMPD_target,
                         /*HasCancel=*/false),
      HelperName(HelperName) {}

/// This is unused for target regions because each starts executing
/// with a single thread.
const VarDecl *getThreadIDVariable() const override { return nullptr; }

/// Get the name of the capture helper.
StringRef getHelperName() const override { return HelperName; }

static bool classof(const CGCapturedStmtInfo *Info) {
  return CGOpenMPRegionInfo::classof(Info) &&
         cast<CGOpenMPRegionInfo>(Info)->getRegionKind() == TargetRegion;
}

340private:
StringRef HelperName;
342};

344static void EmptyCodeGen(CodeGenFunction &, PrePostActionTy &) {
llvm_unreachable("No codegen for expressions")__builtin_unreachable();
346}
347/// API for generation of expressions captured in a innermost OpenMP
348/// region.
349class CGOpenMPInnerExprInfo final : public CGOpenMPInlinedRegionInfo {
350public:
CGOpenMPInnerExprInfo(CodeGenFunction &CGF, const CapturedStmt &CS)
    : CGOpenMPInlinedRegionInfo(CGF.CapturedStmtInfo, EmptyCodeGen,
                                OMPD_unknown,
                                /*HasCancel=*/false),
      PrivScope(CGF) {
  // Make sure the globals captured in the provided statement are local by
  // using the privatization logic. We assume the same variable is not
  // captured more than once.
  for (const auto &C : CS.captures()) {
    if (!C.capturesVariable() && !C.capturesVariableByCopy())
      continue;

    const VarDecl *VD = C.getCapturedVar();
    if (VD->isLocalVarDeclOrParm())
      continue;

    DeclRefExpr DRE(CGF.getContext(), const_cast<VarDecl *>(VD),
                    /*RefersToEnclosingVariableOrCapture=*/false,
                    VD->getType().getNonReferenceType(), VK_LValue,
                    C.getLocation());
    PrivScope.addPrivate(
        VD, [&CGF, &DRE]() { return CGF.EmitLValue(&DRE).getAddress(CGF); });
  }
  (void)PrivScope.Privatize();
}

/// Lookup the captured field decl for a variable.
const FieldDecl *lookup(const VarDecl *VD) const override {
  if (const FieldDecl *FD = CGOpenMPInlinedRegionInfo::lookup(VD))
    return FD;
  return nullptr;
}

/// Emit the captured statement body.
void EmitBody(CodeGenFunction &CGF, const Stmt *S) override {
  llvm_unreachable("No body for expressions")__builtin_unreachable();
}

/// Get a variable or parameter for storing global thread id
/// inside OpenMP construct.
const VarDecl *getThreadIDVariable() const override {
  llvm_unreachable("No thread id for expressions")__builtin_unreachable();
}

/// Get the name of the capture helper.
StringRef getHelperName() const override {
  llvm_unreachable("No helper name for expressions")__builtin_unreachable();
}

static bool classof(const CGCapturedStmtInfo *Info) { return false; }

402private:
/// Private scope to capture global variables.
CodeGenFunction::OMPPrivateScope PrivScope;
405};

407/// RAII for emitting code of OpenMP constructs.
408class InlinedOpenMPRegionRAII {
CodeGenFunction &CGF;
llvm::DenseMap<const VarDecl *, FieldDecl *> LambdaCaptureFields;
FieldDecl *LambdaThisCaptureField = nullptr;
const CodeGen::CGBlockInfo *BlockInfo = nullptr;
bool NoInheritance = false;

415public:
/// Constructs region for combined constructs.
/// \param CodeGen Code generation sequence for combined directives. Includes
/// a list of functions used for code generation of implicitly inlined
/// regions.
InlinedOpenMPRegionRAII(CodeGenFunction &CGF, const RegionCodeGenTy &CodeGen,
                        OpenMPDirectiveKind Kind, bool HasCancel,
                        bool NoInheritance = true)
    : CGF(CGF), NoInheritance(NoInheritance) {
  // Start emission for the construct.
  CGF.CapturedStmtInfo = new CGOpenMPInlinedRegionInfo(
      CGF.CapturedStmtInfo, CodeGen, Kind, HasCancel);
  if (NoInheritance) {
    std::swap(CGF.LambdaCaptureFields, LambdaCaptureFields);
    LambdaThisCaptureField = CGF.LambdaThisCaptureField;
    CGF.LambdaThisCaptureField = nullptr;
    BlockInfo = CGF.BlockInfo;
    CGF.BlockInfo = nullptr;
  }
}

~InlinedOpenMPRegionRAII() {
  // Restore original CapturedStmtInfo only if we're done with code emission.
  auto *OldCSI =
      cast<CGOpenMPInlinedRegionInfo>(CGF.CapturedStmtInfo)->getOldCSI();
  delete CGF.CapturedStmtInfo;
  CGF.CapturedStmtInfo = OldCSI;
  if (NoInheritance) {
    std::swap(CGF.LambdaCaptureFields, LambdaCaptureFields);
    CGF.LambdaThisCaptureField = LambdaThisCaptureField;
    CGF.BlockInfo = BlockInfo;
  }
}
448};

450/// Values for bit flags used in the ident_t to describe the fields.
451/// All enumeric elements are named and described in accordance with the code
452/// from https://github.com/llvm/llvm-project/blob/main/openmp/runtime/src/kmp.h
453enum OpenMPLocationFlags : unsigned {
/// Use trampoline for internal microtask.
OMP_IDENT_IMD = 0x01,
/// Use c-style ident structure.
OMP_IDENT_KMPC = 0x02,
/// Atomic reduction option for kmpc_reduce.
OMP_ATOMIC_REDUCE = 0x10,
/// Explicit 'barrier' directive.
OMP_IDENT_BARRIER_EXPL = 0x20,
/// Implicit barrier in code.
OMP_IDENT_BARRIER_IMPL = 0x40,
/// Implicit barrier in 'for' directive.
OMP_IDENT_BARRIER_IMPL_FOR = 0x40,
/// Implicit barrier in 'sections' directive.
OMP_IDENT_BARRIER_IMPL_SECTIONS = 0xC0,
/// Implicit barrier in 'single' directive.
OMP_IDENT_BARRIER_IMPL_SINGLE = 0x140,
/// Call of __kmp_for_static_init for static loop.
OMP_IDENT_WORK_LOOP = 0x200,
/// Call of __kmp_for_static_init for sections.
OMP_IDENT_WORK_SECTIONS = 0x400,
/// Call of __kmp_for_static_init for distribute.
OMP_IDENT_WORK_DISTRIBUTE = 0x800,
LLVM_MARK_AS_BITMASK_ENUM(/*LargestValue=*/OMP_IDENT_WORK_DISTRIBUTE)LLVM_BITMASK_LARGEST_ENUMERATOR = OMP_IDENT_WORK_DISTRIBUTE
477};

479namespace {
480LLVM_ENABLE_BITMASK_ENUMS_IN_NAMESPACE()using ::llvm::BitmaskEnumDetail::operator~; using ::llvm::BitmaskEnumDetail
::operator|; using ::llvm::BitmaskEnumDetail::operator&; using
 ::llvm::BitmaskEnumDetail::operator^; using ::llvm::BitmaskEnumDetail
::operator|=; using ::llvm::BitmaskEnumDetail::operator&=
; using ::llvm::BitmaskEnumDetail::operator^=;
481/// Values for bit flags for marking which requires clauses have been used.
482enum OpenMPOffloadingRequiresDirFlags : int64_t {
/// flag undefined.
OMP_REQ_UNDEFINED               = 0x000,
/// no requires clause present.
OMP_REQ_NONE                    = 0x001,
/// reverse_offload clause.
OMP_REQ_REVERSE_OFFLOAD         = 0x002,
/// unified_address clause.
OMP_REQ_UNIFIED_ADDRESS         = 0x004,
/// unified_shared_memory clause.
OMP_REQ_UNIFIED_SHARED_MEMORY   = 0x008,
/// dynamic_allocators clause.
OMP_REQ_DYNAMIC_ALLOCATORS      = 0x010,
LLVM_MARK_AS_BITMASK_ENUM(/*LargestValue=*/OMP_REQ_DYNAMIC_ALLOCATORS)LLVM_BITMASK_LARGEST_ENUMERATOR = OMP_REQ_DYNAMIC_ALLOCATORS
496};

498enum OpenMPOffloadingReservedDeviceIDs {
/// Device ID if the device was not defined, runtime should get it
/// from environment variables in the spec.
OMP_DEVICEID_UNDEF = -1,
502};
503} // anonymous namespace

505/// Describes ident structure that describes a source location.
506/// All descriptions are taken from
507/// https://github.com/llvm/llvm-project/blob/main/openmp/runtime/src/kmp.h
508/// Original structure:
509/// typedef struct ident {
510///    kmp_int32 reserved_1;   /**<  might be used in Fortran;
511///                                  see above  */
512///    kmp_int32 flags;        /**<  also f.flags; KMP_IDENT_xxx flags;
513///                                  KMP_IDENT_KMPC identifies this union
514///                                  member  */
515///    kmp_int32 reserved_2;   /**<  not really used in Fortran any more;
516///                                  see above */
517///#if USE_ITT_BUILD
518///                            /*  but currently used for storing
519///                                region-specific ITT */
520///                            /*  contextual information. */
521///#endif /* USE_ITT_BUILD */
522///    kmp_int32 reserved_3;   /**< source[4] in Fortran, do not use for
523///                                 C++  */
524///    char const *psource;    /**< String describing the source location.
525///                            The string is composed of semi-colon separated
526//                             fields which describe the source file,
527///                            the function and a pair of line numbers that
528///                            delimit the construct.
529///                             */
530/// } ident_t;
531enum IdentFieldIndex {
/// might be used in Fortran
IdentField_Reserved_1,
/// OMP_IDENT_xxx flags; OMP_IDENT_KMPC identifies this union member.
IdentField_Flags,
/// Not really used in Fortran any more
IdentField_Reserved_2,
/// Source[4] in Fortran, do not use for C++
IdentField_Reserved_3,
/// String describing the source location. The string is composed of
/// semi-colon separated fields which describe the source file, the function
/// and a pair of line numbers that delimit the construct.
IdentField_PSource
544};

546/// Schedule types for 'omp for' loops (these enumerators are taken from
547/// the enum sched_type in kmp.h).
548enum OpenMPSchedType {
/// Lower bound for default (unordered) versions.
OMP_sch_lower = 32,
OMP_sch_static_chunked = 33,
OMP_sch_static = 34,
OMP_sch_dynamic_chunked = 35,
OMP_sch_guided_chunked = 36,
OMP_sch_runtime = 37,
OMP_sch_auto = 38,
/// static with chunk adjustment (e.g., simd)
OMP_sch_static_balanced_chunked = 45,
/// Lower bound for 'ordered' versions.
OMP_ord_lower = 64,
OMP_ord_static_chunked = 65,
OMP_ord_static = 66,
OMP_ord_dynamic_chunked = 67,
OMP_ord_guided_chunked = 68,
OMP_ord_runtime = 69,
OMP_ord_auto = 70,
OMP_sch_default = OMP_sch_static,
/// dist_schedule types
OMP_dist_sch_static_chunked = 91,
OMP_dist_sch_static = 92,
/// Support for OpenMP 4.5 monotonic and nonmonotonic schedule modifiers.
/// Set if the monotonic schedule modifier was present.
OMP_sch_modifier_monotonic = (1 << 29),
/// Set if the nonmonotonic schedule modifier was present.
OMP_sch_modifier_nonmonotonic = (1 << 30),
576};

578/// A basic class for pre|post-action for advanced codegen sequence for OpenMP
579/// region.
580class CleanupTy final : public EHScopeStack::Cleanup {
PrePostActionTy *Action;

583public:
explicit CleanupTy(PrePostActionTy *Action) : Action(Action) {}
void Emit(CodeGenFunction &CGF, Flags /*flags*/) override {
  if (!CGF.HaveInsertPoint())
    return;
  Action->Exit(CGF);
}
590};

592} // anonymous namespace

594void RegionCodeGenTy::operator()(CodeGenFunction &CGF) const {
CodeGenFunction::RunCleanupsScope Scope(CGF);
if (PrePostAction) {
  CGF.EHStack.pushCleanup<CleanupTy>(NormalAndEHCleanup, PrePostAction);
  Callback(CodeGen, CGF, *PrePostAction);
} else {
  PrePostActionTy Action;
  Callback(CodeGen, CGF, Action);
}
603}

605/// Check if the combiner is a call to UDR combiner and if it is so return the
606/// UDR decl used for reduction.
607static const OMPDeclareReductionDecl *
608getReductionInit(const Expr *ReductionOp) {
if (const auto *CE = dyn_cast<CallExpr>(ReductionOp))
  if (const auto *OVE = dyn_cast<OpaqueValueExpr>(CE->getCallee()))
    if (const auto *DRE =
            dyn_cast<DeclRefExpr>(OVE->getSourceExpr()->IgnoreImpCasts()))
      if (const auto *DRD = dyn_cast<OMPDeclareReductionDecl>(DRE->getDecl()))
        return DRD;
return nullptr;
616}

618static void emitInitWithReductionInitializer(CodeGenFunction &CGF,
                                           const OMPDeclareReductionDecl *DRD,
                                           const Expr *InitOp,
                                           Address Private, Address Original,
                                           QualType Ty) {
if (DRD->getInitializer()) {
  std::pair<llvm::Function *, llvm::Function *> Reduction =
      CGF.CGM.getOpenMPRuntime().getUserDefinedReduction(DRD);
  const auto *CE = cast<CallExpr>(InitOp);
  const auto *OVE = cast<OpaqueValueExpr>(CE->getCallee());
  const Expr *LHS = CE->getArg(/*Arg=*/0)->IgnoreParenImpCasts();
  const Expr *RHS = CE->getArg(/*Arg=*/1)->IgnoreParenImpCasts();
  const auto *LHSDRE =
      cast<DeclRefExpr>(cast<UnaryOperator>(LHS)->getSubExpr());
  const auto *RHSDRE =
      cast<DeclRefExpr>(cast<UnaryOperator>(RHS)->getSubExpr());
  CodeGenFunction::OMPPrivateScope PrivateScope(CGF);
  PrivateScope.addPrivate(cast<VarDecl>(LHSDRE->getDecl()),
                          [=]() { return Private; });
  PrivateScope.addPrivate(cast<VarDecl>(RHSDRE->getDecl()),
                          [=]() { return Original; });
  (void)PrivateScope.Privatize();
  RValue Func = RValue::get(Reduction.second);
  CodeGenFunction::OpaqueValueMapping Map(CGF, OVE, Func);
  CGF.EmitIgnoredExpr(InitOp);
} else {
  llvm::Constant *Init = CGF.CGM.EmitNullConstant(Ty);
  std::string Name = CGF.CGM.getOpenMPRuntime().getName({"init"});
  auto *GV = new llvm::GlobalVariable(
      CGF.CGM.getModule(), Init->getType(), /*isConstant=*/true,
      llvm::GlobalValue::PrivateLinkage, Init, Name);
  LValue LV = CGF.MakeNaturalAlignAddrLValue(GV, Ty);
  RValue InitRVal;
  switch (CGF.getEvaluationKind(Ty)) {
  case TEK_Scalar:
    InitRVal = CGF.EmitLoadOfLValue(LV, DRD->getLocation());
    break;
  case TEK_Complex:
    InitRVal =
        RValue::getComplex(CGF.EmitLoadOfComplex(LV, DRD->getLocation()));
    break;
  case TEK_Aggregate: {
    OpaqueValueExpr OVE(DRD->getLocation(), Ty, VK_LValue);
    CodeGenFunction::OpaqueValueMapping OpaqueMap(CGF, &OVE, LV);
    CGF.EmitAnyExprToMem(&OVE, Private, Ty.getQualifiers(),
                         /*IsInitializer=*/false);
    return;
  }
  }
  OpaqueValueExpr OVE(DRD->getLocation(), Ty, VK_PRValue);
  CodeGenFunction::OpaqueValueMapping OpaqueMap(CGF, &OVE, InitRVal);
  CGF.EmitAnyExprToMem(&OVE, Private, Ty.getQualifiers(),
                       /*IsInitializer=*/false);
}
672}

674/// Emit initialization of arrays of complex types.
675/// \param DestAddr Address of the array.
676/// \param Type Type of array.
677/// \param Init Initial expression of array.
678/// \param SrcAddr Address of the original array.
679static void EmitOMPAggregateInit(CodeGenFunction &CGF, Address DestAddr,
                               QualType Type, bool EmitDeclareReductionInit,
                               const Expr *Init,
                               const OMPDeclareReductionDecl *DRD,
                               Address SrcAddr = Address::invalid()) {
// Perform element-by-element initialization.
QualType ElementTy;

// Drill down to the base element type on both arrays.
const ArrayType *ArrayTy = Type->getAsArrayTypeUnsafe();
llvm::Value *NumElements = CGF.emitArrayLength(ArrayTy, ElementTy, DestAddr);
DestAddr =
    CGF.Builder.CreateElementBitCast(DestAddr, DestAddr.getElementType());
if (DRD)
  SrcAddr =
      CGF.Builder.CreateElementBitCast(SrcAddr, DestAddr.getElementType());

llvm::Value *SrcBegin = nullptr;
if (DRD)
  SrcBegin = SrcAddr.getPointer();
llvm::Value *DestBegin = DestAddr.getPointer();
// Cast from pointer to array type to pointer to single element.
llvm::Value *DestEnd =
    CGF.Builder.CreateGEP(DestAddr.getElementType(), DestBegin, NumElements);
// The basic structure here is a while-do loop.
llvm::BasicBlock *BodyBB = CGF.createBasicBlock("omp.arrayinit.body");
llvm::BasicBlock *DoneBB = CGF.createBasicBlock("omp.arrayinit.done");
llvm::Value *IsEmpty =
    CGF.Builder.CreateICmpEQ(DestBegin, DestEnd, "omp.arrayinit.isempty");
CGF.Builder.CreateCondBr(IsEmpty, DoneBB, BodyBB);

// Enter the loop body, making that address the current address.
llvm::BasicBlock *EntryBB = CGF.Builder.GetInsertBlock();
CGF.EmitBlock(BodyBB);

CharUnits ElementSize = CGF.getContext().getTypeSizeInChars(ElementTy);

llvm::PHINode *SrcElementPHI = nullptr;
Address SrcElementCurrent = Address::invalid();
if (DRD) {
  SrcElementPHI = CGF.Builder.CreatePHI(SrcBegin->getType(), 2,
                                        "omp.arraycpy.srcElementPast");
  SrcElementPHI->addIncoming(SrcBegin, EntryBB);
  SrcElementCurrent =
      Address(SrcElementPHI,
              SrcAddr.getAlignment().alignmentOfArrayElement(ElementSize));
}
llvm::PHINode *DestElementPHI = CGF.Builder.CreatePHI(
    DestBegin->getType(), 2, "omp.arraycpy.destElementPast");
DestElementPHI->addIncoming(DestBegin, EntryBB);
Address DestElementCurrent =
    Address(DestElementPHI,
            DestAddr.getAlignment().alignmentOfArrayElement(ElementSize));

// Emit copy.
{
  CodeGenFunction::RunCleanupsScope InitScope(CGF);
  if (EmitDeclareReductionInit) {
    emitInitWithReductionInitializer(CGF, DRD, Init, DestElementCurrent,
                                     SrcElementCurrent, ElementTy);
  } else
    CGF.EmitAnyExprToMem(Init, DestElementCurrent, ElementTy.getQualifiers(),
                         /*IsInitializer=*/false);
}

if (DRD) {
  // Shift the address forward by one element.
  llvm::Value *SrcElementNext = CGF.Builder.CreateConstGEP1_32(
      SrcAddr.getElementType(), SrcElementPHI, /*Idx0=*/1,
      "omp.arraycpy.dest.element");
  SrcElementPHI->addIncoming(SrcElementNext, CGF.Builder.GetInsertBlock());
}

// Shift the address forward by one element.
llvm::Value *DestElementNext = CGF.Builder.CreateConstGEP1_32(
    DestAddr.getElementType(), DestElementPHI, /*Idx0=*/1,
    "omp.arraycpy.dest.element");
// Check whether we've reached the end.
llvm::Value *Done =
    CGF.Builder.CreateICmpEQ(DestElementNext, DestEnd, "omp.arraycpy.done");
CGF.Builder.CreateCondBr(Done, DoneBB, BodyBB);
DestElementPHI->addIncoming(DestElementNext, CGF.Builder.GetInsertBlock());

// Done.
CGF.EmitBlock(DoneBB, /*IsFinished=*/true);
764}

766LValue ReductionCodeGen::emitSharedLValue(CodeGenFunction &CGF, const Expr *E) {
return CGF.EmitOMPSharedLValue(E);
768}

770LValue ReductionCodeGen::emitSharedLValueUB(CodeGenFunction &CGF,
                                          const Expr *E) {
if (const auto *OASE = dyn_cast<OMPArraySectionExpr>(E))
  return CGF.EmitOMPArraySectionExpr(OASE, /*IsLowerBound=*/false);
return LValue();
775}

777void ReductionCodeGen::emitAggregateInitialization(
  CodeGenFunction &CGF, unsigned N, Address PrivateAddr, LValue SharedLVal,
  const OMPDeclareReductionDecl *DRD) {
// Emit VarDecl with copy init for arrays.
// Get the address of the original variable captured in current
// captured region.
const auto *PrivateVD =
    cast<VarDecl>(cast<DeclRefExpr>(ClausesData[N].Private)->getDecl());
bool EmitDeclareReductionInit =
    DRD && (DRD->getInitializer() || !PrivateVD->hasInit());
EmitOMPAggregateInit(CGF, PrivateAddr, PrivateVD->getType(),
                     EmitDeclareReductionInit,
                     EmitDeclareReductionInit ? ClausesData[N].ReductionOp
                                              : PrivateVD->getInit(),
                     DRD, SharedLVal.getAddress(CGF));
792}

794ReductionCodeGen::ReductionCodeGen(ArrayRef<const Expr *> Shareds,
                                 ArrayRef<const Expr *> Origs,
                                 ArrayRef<const Expr *> Privates,
                                 ArrayRef<const Expr *> ReductionOps) {
ClausesData.reserve(Shareds.size());
SharedAddresses.reserve(Shareds.size());
Sizes.reserve(Shareds.size());
BaseDecls.reserve(Shareds.size());
const auto *IOrig = Origs.begin();
const auto *IPriv = Privates.begin();
const auto *IRed = ReductionOps.begin();
for (const Expr *Ref : Shareds) {
  ClausesData.emplace_back(Ref, *IOrig, *IPriv, *IRed);
  std::advance(IOrig, 1);
  std::advance(IPriv, 1);
  std::advance(IRed, 1);
}
811}

813void ReductionCodeGen::emitSharedOrigLValue(CodeGenFunction &CGF, unsigned N) {
assert(SharedAddresses.size() == N && OrigAddresses.size() == N &&((void)0)
       "Number of generated lvalues must be exactly N.")((void)0);
LValue First = emitSharedLValue(CGF, ClausesData[N].Shared);
LValue Second = emitSharedLValueUB(CGF, ClausesData[N].Shared);
SharedAddresses.emplace_back(First, Second);
if (ClausesData[N].Shared == ClausesData[N].Ref) {
  OrigAddresses.emplace_back(First, Second);
} else {
  LValue First = emitSharedLValue(CGF, ClausesData[N].Ref);
  LValue Second = emitSharedLValueUB(CGF, ClausesData[N].Ref);
  OrigAddresses.emplace_back(First, Second);
}
826}

828void ReductionCodeGen::emitAggregateType(CodeGenFunction &CGF, unsigned N) {
const auto *PrivateVD =
    cast<VarDecl>(cast<DeclRefExpr>(ClausesData[N].Private)->getDecl());
QualType PrivateType = PrivateVD->getType();
bool AsArraySection = isa<OMPArraySectionExpr>(ClausesData[N].Ref);
if (!PrivateType->isVariablyModifiedType()) {
  Sizes.emplace_back(
      CGF.getTypeSize(OrigAddresses[N].first.getType().getNonReferenceType()),
      nullptr);
  return;
}
llvm::Value *Size;
llvm::Value *SizeInChars;
auto *ElemType =
    cast<llvm::PointerType>(OrigAddresses[N].first.getPointer(CGF)->getType())
        ->getElementType();
auto *ElemSizeOf = llvm::ConstantExpr::getSizeOf(ElemType);
if (AsArraySection) {
  Size = CGF.Builder.CreatePtrDiff(OrigAddresses[N].second.getPointer(CGF),
                                   OrigAddresses[N].first.getPointer(CGF));
  Size = CGF.Builder.CreateNUWAdd(
      Size, llvm::ConstantInt::get(Size->getType(), /*V=*/1));
  SizeInChars = CGF.Builder.CreateNUWMul(Size, ElemSizeOf);
} else {
  SizeInChars =
      CGF.getTypeSize(OrigAddresses[N].first.getType().getNonReferenceType());
  Size = CGF.Builder.CreateExactUDiv(SizeInChars, ElemSizeOf);
}
Sizes.emplace_back(SizeInChars, Size);
CodeGenFunction::OpaqueValueMapping OpaqueMap(
    CGF,
    cast<OpaqueValueExpr>(
        CGF.getContext().getAsVariableArrayType(PrivateType)->getSizeExpr()),
    RValue::get(Size));
CGF.EmitVariablyModifiedType(PrivateType);
863}

865void ReductionCodeGen::emitAggregateType(CodeGenFunction &CGF, unsigned N,
                                       llvm::Value *Size) {
const auto *PrivateVD =
    cast<VarDecl>(cast<DeclRefExpr>(ClausesData[N].Private)->getDecl());
QualType PrivateType = PrivateVD->getType();
if (!PrivateType->isVariablyModifiedType()) {
  assert(!Size && !Sizes[N].second &&((void)0)
         "Size should be nullptr for non-variably modified reduction "((void)0)
         "items.")((void)0);
  return;
}
CodeGenFunction::OpaqueValueMapping OpaqueMap(
    CGF,
    cast<OpaqueValueExpr>(
        CGF.getContext().getAsVariableArrayType(PrivateType)->getSizeExpr()),
    RValue::get(Size));
CGF.EmitVariablyModifiedType(PrivateType);
882}

884void ReductionCodeGen::emitInitialization(
  CodeGenFunction &CGF, unsigned N, Address PrivateAddr, LValue SharedLVal,
  llvm::function_ref<bool(CodeGenFunction &)> DefaultInit) {
assert(SharedAddresses.size() > N && "No variable was generated")((void)0);
const auto *PrivateVD =
    cast<VarDecl>(cast<DeclRefExpr>(ClausesData[N].Private)->getDecl());
const OMPDeclareReductionDecl *DRD =
    getReductionInit(ClausesData[N].ReductionOp);
QualType PrivateType = PrivateVD->getType();
PrivateAddr = CGF.Builder.CreateElementBitCast(
    PrivateAddr, CGF.ConvertTypeForMem(PrivateType));
QualType SharedType = SharedAddresses[N].first.getType();
SharedLVal = CGF.MakeAddrLValue(
    CGF.Builder.CreateElementBitCast(SharedLVal.getAddress(CGF),
                                     CGF.ConvertTypeForMem(SharedType)),
    SharedType, SharedAddresses[N].first.getBaseInfo(),
    CGF.CGM.getTBAAInfoForSubobject(SharedAddresses[N].first, SharedType));
if (CGF.getContext().getAsArrayType(PrivateVD->getType())) {
  if (DRD && DRD->getInitializer())
    (void)DefaultInit(CGF);
  emitAggregateInitialization(CGF, N, PrivateAddr, SharedLVal, DRD);
} else if (DRD && (DRD->getInitializer() || !PrivateVD->hasInit())) {
  (void)DefaultInit(CGF);
  emitInitWithReductionInitializer(CGF, DRD, ClausesData[N].ReductionOp,
                                   PrivateAddr, SharedLVal.getAddress(CGF),
                                   SharedLVal.getType());
} else if (!DefaultInit(CGF) && PrivateVD->hasInit() &&
           !CGF.isTrivialInitializer(PrivateVD->getInit())) {
  CGF.EmitAnyExprToMem(PrivateVD->getInit(), PrivateAddr,
                       PrivateVD->getType().getQualifiers(),
                       /*IsInitializer=*/false);
}
916}

918bool ReductionCodeGen::needCleanups(unsigned N) {
const auto *PrivateVD =
    cast<VarDecl>(cast<DeclRefExpr>(ClausesData[N].Private)->getDecl());
QualType PrivateType = PrivateVD->getType();
QualType::DestructionKind DTorKind = PrivateType.isDestructedType();
return DTorKind != QualType::DK_none;
924}

926void ReductionCodeGen::emitCleanups(CodeGenFunction &CGF, unsigned N,
                                  Address PrivateAddr) {
const auto *PrivateVD =
    cast<VarDecl>(cast<DeclRefExpr>(ClausesData[N].Private)->getDecl());
QualType PrivateType = PrivateVD->getType();
QualType::DestructionKind DTorKind = PrivateType.isDestructedType();
if (needCleanups(N)) {
  PrivateAddr = CGF.Builder.CreateElementBitCast(
      PrivateAddr, CGF.ConvertTypeForMem(PrivateType));
  CGF.pushDestroy(DTorKind, PrivateAddr, PrivateType);
}
937}

939static LValue loadToBegin(CodeGenFunction &CGF, QualType BaseTy, QualType ElTy,
                        LValue BaseLV) {
BaseTy = BaseTy.getNonReferenceType();
while ((BaseTy->isPointerType() || BaseTy->isReferenceType()) &&
       !CGF.getContext().hasSameType(BaseTy, ElTy)) {
  if (const auto *PtrTy = BaseTy->getAs<PointerType>()) {
    BaseLV = CGF.EmitLoadOfPointerLValue(BaseLV.getAddress(CGF), PtrTy);
  } else {
    LValue RefLVal = CGF.MakeAddrLValue(BaseLV.getAddress(CGF), BaseTy);
    BaseLV = CGF.EmitLoadOfReferenceLValue(RefLVal);
  }
  BaseTy = BaseTy->getPointeeType();
}
return CGF.MakeAddrLValue(
    CGF.Builder.CreateElementBitCast(BaseLV.getAddress(CGF),
                                     CGF.ConvertTypeForMem(ElTy)),
    BaseLV.getType(), BaseLV.getBaseInfo(),
    CGF.CGM.getTBAAInfoForSubobject(BaseLV, BaseLV.getType()));
957}

959static Address castToBase(CodeGenFunction &CGF, QualType BaseTy, QualType ElTy,
                        llvm::Type *BaseLVType, CharUnits BaseLVAlignment,
                        llvm::Value *Addr) {
Address Tmp = Address::invalid();
Address TopTmp = Address::invalid();
Address MostTopTmp = Address::invalid();
BaseTy = BaseTy.getNonReferenceType();
while ((BaseTy->isPointerType() || BaseTy->isReferenceType()) &&
       !CGF.getContext().hasSameType(BaseTy, ElTy)) {
  Tmp = CGF.CreateMemTemp(BaseTy);
  if (TopTmp.isValid())
    CGF.Builder.CreateStore(Tmp.getPointer(), TopTmp);
  else
    MostTopTmp = Tmp;
  TopTmp = Tmp;
  BaseTy = BaseTy->getPointeeType();
}
llvm::Type *Ty = BaseLVType;
if (Tmp.isValid())
  Ty = Tmp.getElementType();
Addr = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(Addr, Ty);
if (Tmp.isValid()) {
  CGF.Builder.CreateStore(Addr, Tmp);
  return MostTopTmp;
}
return Address(Addr, BaseLVAlignment);
985}

987static const VarDecl *getBaseDecl(const Expr *Ref, const DeclRefExpr *&DE) {
const VarDecl *OrigVD = nullptr;
if (const auto *OASE = dyn_cast<OMPArraySectionExpr>(Ref)) {
  const Expr *Base = OASE->getBase()->IgnoreParenImpCasts();
  while (const auto *TempOASE = dyn_cast<OMPArraySectionExpr>(Base))
    Base = TempOASE->getBase()->IgnoreParenImpCasts();
  while (const auto *TempASE = dyn_cast<ArraySubscriptExpr>(Base))
    Base = TempASE->getBase()->IgnoreParenImpCasts();
  DE = cast<DeclRefExpr>(Base);
  OrigVD = cast<VarDecl>(DE->getDecl());
} else if (const auto *ASE = dyn_cast<ArraySubscriptExpr>(Ref)) {
  const Expr *Base = ASE->getBase()->IgnoreParenImpCasts();
  while (const auto *TempASE = dyn_cast<ArraySubscriptExpr>(Base))
    Base = TempASE->getBase()->IgnoreParenImpCasts();
  DE = cast<DeclRefExpr>(Base);
  OrigVD = cast<VarDecl>(DE->getDecl());
}
return OrigVD;
1005}

1007Address ReductionCodeGen::adjustPrivateAddress(CodeGenFunction &CGF, unsigned N,
                                             Address PrivateAddr) {
const DeclRefExpr *DE;
if (const VarDecl *OrigVD = ::getBaseDecl(ClausesData[N].Ref, DE)) {
  BaseDecls.emplace_back(OrigVD);
  LValue OriginalBaseLValue = CGF.EmitLValue(DE);
  LValue BaseLValue =
      loadToBegin(CGF, OrigVD->getType(), SharedAddresses[N].first.getType(),
                  OriginalBaseLValue);
  Address SharedAddr = SharedAddresses[N].first.getAddress(CGF);
  llvm::Value *Adjustment = CGF.Builder.CreatePtrDiff(
      BaseLValue.getPointer(CGF), SharedAddr.getPointer());
  llvm::Value *PrivatePointer =
      CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
          PrivateAddr.getPointer(), SharedAddr.getType());
  llvm::Value *Ptr = CGF.Builder.CreateGEP(
      SharedAddr.getElementType(), PrivatePointer, Adjustment);
  return castToBase(CGF, OrigVD->getType(),
                    SharedAddresses[N].first.getType(),
                    OriginalBaseLValue.getAddress(CGF).getType(),
                    OriginalBaseLValue.getAlignment(), Ptr);
}
BaseDecls.emplace_back(
    cast<VarDecl>(cast<DeclRefExpr>(ClausesData[N].Ref)->getDecl()));
return PrivateAddr;
1032}

1034bool ReductionCodeGen::usesReductionInitializer(unsigned N) const {
const OMPDeclareReductionDecl *DRD =
    getReductionInit(ClausesData[N].ReductionOp);
return DRD && DRD->getInitializer();
1038}

1040LValue CGOpenMPRegionInfo::getThreadIDVariableLValue(CodeGenFunction &CGF) {
return CGF.EmitLoadOfPointerLValue(
    CGF.GetAddrOfLocalVar(getThreadIDVariable()),
    getThreadIDVariable()->getType()->castAs<PointerType>());
1044}

1046void CGOpenMPRegionInfo::EmitBody(CodeGenFunction &CGF, const Stmt *S) {
if (!CGF.HaveInsertPoint())
  return;
// 1.2.2 OpenMP Language Terminology
// Structured block - An executable statement with a single entry at the
// top and a single exit at the bottom.
// The point of exit cannot be a branch out of the structured block.
// longjmp() and throw() must not violate the entry/exit criteria.
CGF.EHStack.pushTerminate();
if (S)
  CGF.incrementProfileCounter(S);
CodeGen(CGF);
CGF.EHStack.popTerminate();
1059}

1061LValue CGOpenMPTaskOutlinedRegionInfo::getThreadIDVariableLValue(
  CodeGenFunction &CGF) {
return CGF.MakeAddrLValue(CGF.GetAddrOfLocalVar(getThreadIDVariable()),
                          getThreadIDVariable()->getType(),
                          AlignmentSource::Decl);
1066}

1068static FieldDecl *addFieldToRecordDecl(ASTContext &C, DeclContext *DC,
                                     QualType FieldTy) {
auto *Field = FieldDecl::Create(
    C, DC, SourceLocation(), SourceLocation(), /*Id=*/nullptr, FieldTy,
    C.getTrivialTypeSourceInfo(FieldTy, SourceLocation()),
    /*BW=*/nullptr, /*Mutable=*/false, /*InitStyle=*/ICIS_NoInit);
Field->setAccess(AS_public);
DC->addDecl(Field);
return Field;
1077}

1079CGOpenMPRuntime::CGOpenMPRuntime(CodeGenModule &CGM, StringRef FirstSeparator,
                               StringRef Separator)
  : CGM(CGM), FirstSeparator(FirstSeparator), Separator(Separator),
    OMPBuilder(CGM.getModule()), OffloadEntriesInfoManager(CGM) {
KmpCriticalNameTy = llvm::ArrayType::get(CGM.Int32Ty, /*NumElements*/ 8);

// Initialize Types used in OpenMPIRBuilder from OMPKinds.def
OMPBuilder.initialize();
loadOffloadInfoMetadata();
1088}

1090void CGOpenMPRuntime::clear() {
InternalVars.clear();
// Clean non-target variable declarations possibly used only in debug info.
for (const auto &Data : EmittedNonTargetVariables) {
  if (!Data.getValue().pointsToAliveValue())
    continue;
  auto *GV = dyn_cast<llvm::GlobalVariable>(Data.getValue());
  if (!GV)
    continue;
  if (!GV->isDeclaration() || GV->getNumUses() > 0)
    continue;
  GV->eraseFromParent();
}
1103}

1105std::string CGOpenMPRuntime::getName(ArrayRef<StringRef> Parts) const {
SmallString<128> Buffer;
llvm::raw_svector_ostream OS(Buffer);
StringRef Sep = FirstSeparator;
for (StringRef Part : Parts) {
  OS << Sep << Part;
  Sep = Separator;
}
return std::string(OS.str());
1114}

1116static llvm::Function *
1117emitCombinerOrInitializer(CodeGenModule &CGM, QualType Ty,
                        const Expr *CombinerInitializer, const VarDecl *In,
                        const VarDecl *Out, bool IsCombiner) {
// void .omp_combiner.(Ty *in, Ty *out);
ASTContext &C = CGM.getContext();
QualType PtrTy = C.getPointerType(Ty).withRestrict();
FunctionArgList Args;
ImplicitParamDecl OmpOutParm(C, /*DC=*/nullptr, Out->getLocation(),
                             /*Id=*/nullptr, PtrTy, ImplicitParamDecl::Other);
ImplicitParamDecl OmpInParm(C, /*DC=*/nullptr, In->getLocation(),
                            /*Id=*/nullptr, PtrTy, ImplicitParamDecl::Other);
Args.push_back(&OmpOutParm);
Args.push_back(&OmpInParm);
const CGFunctionInfo &FnInfo =
    CGM.getTypes().arrangeBuiltinFunctionDeclaration(C.VoidTy, Args);
llvm::FunctionType *FnTy = CGM.getTypes().GetFunctionType(FnInfo);
std::string Name = CGM.getOpenMPRuntime().getName(
    {IsCombiner ? "omp_combiner" : "omp_initializer", ""});
auto *Fn = llvm::Function::Create(FnTy, llvm::GlobalValue::InternalLinkage,
                                  Name, &CGM.getModule());
CGM.SetInternalFunctionAttributes(GlobalDecl(), Fn, FnInfo);
if (CGM.getLangOpts().Optimize) {
  Fn->removeFnAttr(llvm::Attribute::NoInline);
  Fn->removeFnAttr(llvm::Attribute::OptimizeNone);
  Fn->addFnAttr(llvm::Attribute::AlwaysInline);
}
CodeGenFunction CGF(CGM);
// Map "T omp_in;" variable to "*omp_in_parm" value in all expressions.
// Map "T omp_out;" variable to "*omp_out_parm" value in all expressions.
CGF.StartFunction(GlobalDecl(), C.VoidTy, Fn, FnInfo, Args, In->getLocation(),
                  Out->getLocation());
CodeGenFunction::OMPPrivateScope Scope(CGF);
Address AddrIn = CGF.GetAddrOfLocalVar(&OmpInParm);
Scope.addPrivate(In, [&CGF, AddrIn, PtrTy]() {
  return CGF.EmitLoadOfPointerLValue(AddrIn, PtrTy->castAs<PointerType>())
      .getAddress(CGF);
});
Address AddrOut = CGF.GetAddrOfLocalVar(&OmpOutParm);
Scope.addPrivate(Out, [&CGF, AddrOut, PtrTy]() {
  return CGF.EmitLoadOfPointerLValue(AddrOut, PtrTy->castAs<PointerType>())
      .getAddress(CGF);
});
(void)Scope.Privatize();
if (!IsCombiner && Out->hasInit() &&
    !CGF.isTrivialInitializer(Out->getInit())) {
  CGF.EmitAnyExprToMem(Out->getInit(), CGF.GetAddrOfLocalVar(Out),
                       Out->getType().getQualifiers(),
                       /*IsInitializer=*/true);
}
if (CombinerInitializer)
  CGF.EmitIgnoredExpr(CombinerInitializer);
Scope.ForceCleanup();
CGF.FinishFunction();
return Fn;
1171}

1173void CGOpenMPRuntime::emitUserDefinedReduction(
  CodeGenFunction *CGF, const OMPDeclareReductionDecl *D) {
if (UDRMap.count(D) > 0)
  return;
llvm::Function *Combiner = emitCombinerOrInitializer(
    CGM, D->getType(), D->getCombiner(),
    cast<VarDecl>(cast<DeclRefExpr>(D->getCombinerIn())->getDecl()),
    cast<VarDecl>(cast<DeclRefExpr>(D->getCombinerOut())->getDecl()),
    /*IsCombiner=*/true);
llvm::Function *Initializer = nullptr;
if (const Expr *Init = D->getInitializer()) {
  Initializer = emitCombinerOrInitializer(
      CGM, D->getType(),
      D->getInitializerKind() == OMPDeclareReductionDecl::CallInit ? Init
                                                                   : nullptr,
      cast<VarDecl>(cast<DeclRefExpr>(D->getInitOrig())->getDecl()),
      cast<VarDecl>(cast<DeclRefExpr>(D->getInitPriv())->getDecl()),
      /*IsCombiner=*/false);
}
UDRMap.try_emplace(D, Combiner, Initializer);
if (CGF) {
  auto &Decls = FunctionUDRMap.FindAndConstruct(CGF->CurFn);
  Decls.second.push_back(D);
}
1197}

1199std::pair<llvm::Function *, llvm::Function *>
1200CGOpenMPRuntime::getUserDefinedReduction(const OMPDeclareReductionDecl *D) {
auto I = UDRMap.find(D);
if (I != UDRMap.end())
  return I->second;
emitUserDefinedReduction(/*CGF=*/nullptr, D);
return UDRMap.lookup(D);
1206}

1208namespace {
1209// Temporary RAII solution to perform a push/pop stack event on the OpenMP IR
1210// Builder if one is present.
1211struct PushAndPopStackRAII {
PushAndPopStackRAII(llvm::OpenMPIRBuilder *OMPBuilder, CodeGenFunction &CGF,
                    bool HasCancel, llvm::omp::Directive Kind)
    : OMPBuilder(OMPBuilder) {
  if (!OMPBuilder)
    return;

  // The following callback is the crucial part of clangs cleanup process.
  //
  // NOTE:
  // Once the OpenMPIRBuilder is used to create parallel regions (and
  // similar), the cancellation destination (Dest below) is determined via
  // IP. That means if we have variables to finalize we split the block at IP,
  // use the new block (=BB) as destination to build a JumpDest (via
  // getJumpDestInCurrentScope(BB)) which then is fed to
  // EmitBranchThroughCleanup. Furthermore, there will not be the need
  // to push & pop an FinalizationInfo object.
  // The FiniCB will still be needed but at the point where the
  // OpenMPIRBuilder is asked to construct a parallel (or similar) construct.
  auto FiniCB = [&CGF](llvm::OpenMPIRBuilder::InsertPointTy IP) {
    assert(IP.getBlock()->end() == IP.getPoint() &&((void)0)
           "Clang CG should cause non-terminated block!")((void)0);
    CGBuilderTy::InsertPointGuard IPG(CGF.Builder);
    CGF.Builder.restoreIP(IP);
    CodeGenFunction::JumpDest Dest =
        CGF.getOMPCancelDestination(OMPD_parallel);
    CGF.EmitBranchThroughCleanup(Dest);
  };

  // TODO: Remove this once we emit parallel regions through the
  //       OpenMPIRBuilder as it can do this setup internally.
  llvm::OpenMPIRBuilder::FinalizationInfo FI({FiniCB, Kind, HasCancel});
  OMPBuilder->pushFinalizationCB(std::move(FI));
}
~PushAndPopStackRAII() {
  if (OMPBuilder)
    OMPBuilder->popFinalizationCB();
}
llvm::OpenMPIRBuilder *OMPBuilder;
1250};
1251} // namespace

1253static llvm::Function *emitParallelOrTeamsOutlinedFunction(
  CodeGenModule &CGM, const OMPExecutableDirective &D, const CapturedStmt *CS,
  const VarDecl *ThreadIDVar, OpenMPDirectiveKind InnermostKind,
  const StringRef OutlinedHelperName, const RegionCodeGenTy &CodeGen) {
assert(ThreadIDVar->getType()->isPointerType() &&((void)0)
       "thread id variable must be of type kmp_int32 *")((void)0);
CodeGenFunction CGF(CGM, true);
bool HasCancel = false;
if (const auto *OPD = dyn_cast<OMPParallelDirective>(&D))
  HasCancel = OPD->hasCancel();
else if (const auto *OPD = dyn_cast<OMPTargetParallelDirective>(&D))
  HasCancel = OPD->hasCancel();
else if (const auto *OPSD = dyn_cast<OMPParallelSectionsDirective>(&D))
  HasCancel = OPSD->hasCancel();
else if (const auto *OPFD = dyn_cast<OMPParallelForDirective>(&D))
  HasCancel = OPFD->hasCancel();
else if (const auto *OPFD = dyn_cast<OMPTargetParallelForDirective>(&D))
  HasCancel = OPFD->hasCancel();
else if (const auto *OPFD = dyn_cast<OMPDistributeParallelForDirective>(&D))
  HasCancel = OPFD->hasCancel();
else if (const auto *OPFD =
             dyn_cast<OMPTeamsDistributeParallelForDirective>(&D))
  HasCancel = OPFD->hasCancel();
else if (const auto *OPFD =
             dyn_cast<OMPTargetTeamsDistributeParallelForDirective>(&D))
  HasCancel = OPFD->hasCancel();

// TODO: Temporarily inform the OpenMPIRBuilder, if any, about the new
//       parallel region to make cancellation barriers work properly.
llvm::OpenMPIRBuilder &OMPBuilder = CGM.getOpenMPRuntime().getOMPBuilder();
PushAndPopStackRAII PSR(&OMPBuilder, CGF, HasCancel, InnermostKind);
CGOpenMPOutlinedRegionInfo CGInfo(*CS, ThreadIDVar, CodeGen, InnermostKind,
                                  HasCancel, OutlinedHelperName);
CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(CGF, &CGInfo);
return CGF.GenerateOpenMPCapturedStmtFunction(*CS, D.getBeginLoc());
1288}

1290llvm::Function *CGOpenMPRuntime::emitParallelOutlinedFunction(
  const OMPExecutableDirective &D, const VarDecl *ThreadIDVar,
  OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen) {
const CapturedStmt *CS = D.getCapturedStmt(OMPD_parallel);
return emitParallelOrTeamsOutlinedFunction(
    CGM, D, CS, ThreadIDVar, InnermostKind, getOutlinedHelperName(), CodeGen);
1296}

1298llvm::Function *CGOpenMPRuntime::emitTeamsOutlinedFunction(
  const OMPExecutableDirective &D, const VarDecl *ThreadIDVar,
  OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen) {
const CapturedStmt *CS = D.getCapturedStmt(OMPD_teams);
return emitParallelOrTeamsOutlinedFunction(
    CGM, D, CS, ThreadIDVar, InnermostKind, getOutlinedHelperName(), CodeGen);
1304}

1306llvm::Function *CGOpenMPRuntime::emitTaskOutlinedFunction(
  const OMPExecutableDirective &D, const VarDecl *ThreadIDVar,
  const VarDecl *PartIDVar, const VarDecl *TaskTVar,
  OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen,
  bool Tied, unsigned &NumberOfParts) {
auto &&UntiedCodeGen = [this, &D, TaskTVar](CodeGenFunction &CGF,
                                            PrePostActionTy &) {
  llvm::Value *ThreadID = getThreadID(CGF, D.getBeginLoc());
  llvm::Value *UpLoc = emitUpdateLocation(CGF, D.getBeginLoc());
  llvm::Value *TaskArgs[] = {
      UpLoc, ThreadID,
      CGF.EmitLoadOfPointerLValue(CGF.GetAddrOfLocalVar(TaskTVar),
                                  TaskTVar->getType()->castAs<PointerType>())
          .getPointer(CGF)};
  CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                          CGM.getModule(), OMPRTL___kmpc_omp_task),
                      TaskArgs);
};
CGOpenMPTaskOutlinedRegionInfo::UntiedTaskActionTy Action(Tied, PartIDVar,
                                                          UntiedCodeGen);
CodeGen.setAction(Action);
assert(!ThreadIDVar->getType()->isPointerType() &&((void)0)
       "thread id variable must be of type kmp_int32 for tasks")((void)0);
const OpenMPDirectiveKind Region =
    isOpenMPTaskLoopDirective(D.getDirectiveKind()) ? OMPD_taskloop
                                                    : OMPD_task;
const CapturedStmt *CS = D.getCapturedStmt(Region);
bool HasCancel = false;
if (const auto *TD = dyn_cast<OMPTaskDirective>(&D))
  HasCancel = TD->hasCancel();
else if (const auto *TD = dyn_cast<OMPTaskLoopDirective>(&D))
  HasCancel = TD->hasCancel();
else if (const auto *TD = dyn_cast<OMPMasterTaskLoopDirective>(&D))
  HasCancel = TD->hasCancel();
else if (const auto *TD = dyn_cast<OMPParallelMasterTaskLoopDirective>(&D))
  HasCancel = TD->hasCancel();

CodeGenFunction CGF(CGM, true);
CGOpenMPTaskOutlinedRegionInfo CGInfo(*CS, ThreadIDVar, CodeGen,
                                      InnermostKind, HasCancel, Action);
CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(CGF, &CGInfo);
llvm::Function *Res = CGF.GenerateCapturedStmtFunction(*CS);
if (!Tied)
  NumberOfParts = Action.getNumberOfParts();
return Res;
1351}

1353static void buildStructValue(ConstantStructBuilder &Fields, CodeGenModule &CGM,
                           const RecordDecl *RD, const CGRecordLayout &RL,
                           ArrayRef<llvm::Constant *> Data) {
llvm::StructType *StructTy = RL.getLLVMType();
unsigned PrevIdx = 0;
ConstantInitBuilder CIBuilder(CGM);
auto DI = Data.begin();
for (const FieldDecl *FD : RD->fields()) {
  unsigned Idx = RL.getLLVMFieldNo(FD);
  // Fill the alignment.
  for (unsigned I = PrevIdx; I < Idx; ++I)
    Fields.add(llvm::Constant::getNullValue(StructTy->getElementType(I)));
  PrevIdx = Idx + 1;
  Fields.add(*DI);
  ++DI;
}
1369}

1371template <class... As>
1372static llvm::GlobalVariable *
1373createGlobalStruct(CodeGenModule &CGM, QualType Ty, bool IsConstant,
                 ArrayRef<llvm::Constant *> Data, const Twine &Name,
                 As &&... Args) {
const auto *RD = cast<RecordDecl>(Ty->getAsTagDecl());
const CGRecordLayout &RL = CGM.getTypes().getCGRecordLayout(RD);
ConstantInitBuilder CIBuilder(CGM);
ConstantStructBuilder Fields = CIBuilder.beginStruct(RL.getLLVMType());
buildStructValue(Fields, CGM, RD, RL, Data);
return Fields.finishAndCreateGlobal(
    Name, CGM.getContext().getAlignOfGlobalVarInChars(Ty), IsConstant,
    std::forward<As>(Args)...);
1384}

1386template <typename T>
1387static void
1388createConstantGlobalStructAndAddToParent(CodeGenModule &CGM, QualType Ty,
                                       ArrayRef<llvm::Constant *> Data,
                                       T &Parent) {
const auto *RD = cast<RecordDecl>(Ty->getAsTagDecl());
const CGRecordLayout &RL = CGM.getTypes().getCGRecordLayout(RD);
ConstantStructBuilder Fields = Parent.beginStruct(RL.getLLVMType());
buildStructValue(Fields, CGM, RD, RL, Data);
Fields.finishAndAddTo(Parent);
1396}

1398void CGOpenMPRuntime::setLocThreadIdInsertPt(CodeGenFunction &CGF,
                                           bool AtCurrentPoint) {
auto &Elem = OpenMPLocThreadIDMap.FindAndConstruct(CGF.CurFn);
assert(!Elem.second.ServiceInsertPt && "Insert point is set already.")((void)0);

llvm::Value *Undef = llvm::UndefValue::get(CGF.Int32Ty);
if (AtCurrentPoint) {
  Elem.second.ServiceInsertPt = new llvm::BitCastInst(
      Undef, CGF.Int32Ty, "svcpt", CGF.Builder.GetInsertBlock());
} else {
  Elem.second.ServiceInsertPt =
      new llvm::BitCastInst(Undef, CGF.Int32Ty, "svcpt");
  Elem.second.ServiceInsertPt->insertAfter(CGF.AllocaInsertPt);
}
1412}

1414void CGOpenMPRuntime::clearLocThreadIdInsertPt(CodeGenFunction &CGF) {
auto &Elem = OpenMPLocThreadIDMap.FindAndConstruct(CGF.CurFn);
if (Elem.second.ServiceInsertPt) {
  llvm::Instruction *Ptr = Elem.second.ServiceInsertPt;
  Elem.second.ServiceInsertPt = nullptr;
  Ptr->eraseFromParent();
}
1421}

1423static StringRef getIdentStringFromSourceLocation(CodeGenFunction &CGF,
                                                SourceLocation Loc,
                                                SmallString<128> &Buffer) {
llvm::raw_svector_ostream OS(Buffer);
// Build debug location
PresumedLoc PLoc = CGF.getContext().getSourceManager().getPresumedLoc(Loc);
OS << ";" << PLoc.getFilename() << ";";
if (const auto *FD = dyn_cast_or_null<FunctionDecl>(CGF.CurFuncDecl))
  OS << FD->getQualifiedNameAsString();
OS << ";" << PLoc.getLine() << ";" << PLoc.getColumn() << ";;";
return OS.str();
1434}

1436llvm::Value *CGOpenMPRuntime::emitUpdateLocation(CodeGenFunction &CGF,
                                               SourceLocation Loc,
                                               unsigned Flags) {
llvm::Constant *SrcLocStr;
if (CGM.getCodeGenOpts().getDebugInfo() == codegenoptions::NoDebugInfo ||
    Loc.isInvalid()) {
  SrcLocStr = OMPBuilder.getOrCreateDefaultSrcLocStr();
} else {
  std::string FunctionName = "";
  if (const auto *FD = dyn_cast_or_null<FunctionDecl>(CGF.CurFuncDecl))
    FunctionName = FD->getQualifiedNameAsString();
  PresumedLoc PLoc = CGF.getContext().getSourceManager().getPresumedLoc(Loc);
  const char *FileName = PLoc.getFilename();
  unsigned Line = PLoc.getLine();
  unsigned Column = PLoc.getColumn();
  SrcLocStr = OMPBuilder.getOrCreateSrcLocStr(FunctionName.c_str(), FileName,
                                              Line, Column);
}
unsigned Reserved2Flags = getDefaultLocationReserved2Flags();
return OMPBuilder.getOrCreateIdent(SrcLocStr, llvm::omp::IdentFlag(Flags),
                                   Reserved2Flags);
1457}

1459llvm::Value *CGOpenMPRuntime::getThreadID(CodeGenFunction &CGF,
                                        SourceLocation Loc) {
assert(CGF.CurFn && "No function in current CodeGenFunction.")((void)0);
// If the OpenMPIRBuilder is used we need to use it for all thread id calls as
// the clang invariants used below might be broken.
if (CGM.getLangOpts().OpenMPIRBuilder) {
  SmallString<128> Buffer;
  OMPBuilder.updateToLocation(CGF.Builder.saveIP());
  auto *SrcLocStr = OMPBuilder.getOrCreateSrcLocStr(
      getIdentStringFromSourceLocation(CGF, Loc, Buffer));
  return OMPBuilder.getOrCreateThreadID(
      OMPBuilder.getOrCreateIdent(SrcLocStr));
}

llvm::Value *ThreadID = nullptr;
// Check whether we've already cached a load of the thread id in this
// function.
auto I = OpenMPLocThreadIDMap.find(CGF.CurFn);
if (I != OpenMPLocThreadIDMap.end()) {
  ThreadID = I->second.ThreadID;
  if (ThreadID != nullptr)
    return ThreadID;
}
// If exceptions are enabled, do not use parameter to avoid possible crash.
if (auto *OMPRegionInfo =
        dyn_cast_or_null<CGOpenMPRegionInfo>(CGF.CapturedStmtInfo)) {
  if (OMPRegionInfo->getThreadIDVariable()) {
    // Check if this an outlined function with thread id passed as argument.
    LValue LVal = OMPRegionInfo->getThreadIDVariableLValue(CGF);
    llvm::BasicBlock *TopBlock = CGF.AllocaInsertPt->getParent();
    if (!CGF.EHStack.requiresLandingPad() || !CGF.getLangOpts().Exceptions ||
        !CGF.getLangOpts().CXXExceptions ||
        CGF.Builder.GetInsertBlock() == TopBlock ||
        !isa<llvm::Instruction>(LVal.getPointer(CGF)) ||
        cast<llvm::Instruction>(LVal.getPointer(CGF))->getParent() ==
            TopBlock ||
        cast<llvm::Instruction>(LVal.getPointer(CGF))->getParent() ==
            CGF.Builder.GetInsertBlock()) {
      ThreadID = CGF.EmitLoadOfScalar(LVal, Loc);
      // If value loaded in entry block, cache it and use it everywhere in
      // function.
      if (CGF.Builder.GetInsertBlock() == TopBlock) {
        auto &Elem = OpenMPLocThreadIDMap.FindAndConstruct(CGF.CurFn);
        Elem.second.ThreadID = ThreadID;
      }
      return ThreadID;
    }
  }
}

// This is not an outlined function region - need to call __kmpc_int32
// kmpc_global_thread_num(ident_t *loc).
// Generate thread id value and cache this value for use across the
// function.
auto &Elem = OpenMPLocThreadIDMap.FindAndConstruct(CGF.CurFn);
if (!Elem.second.ServiceInsertPt)
  setLocThreadIdInsertPt(CGF);
CGBuilderTy::InsertPointGuard IPG(CGF.Builder);
CGF.Builder.SetInsertPoint(Elem.second.ServiceInsertPt);
llvm::CallInst *Call = CGF.Builder.CreateCall(
    OMPBuilder.getOrCreateRuntimeFunction(CGM.getModule(),
                                          OMPRTL___kmpc_global_thread_num),
    emitUpdateLocation(CGF, Loc));
Call->setCallingConv(CGF.getRuntimeCC());
Elem.second.ThreadID = Call;
return Call;
1525}

1527void CGOpenMPRuntime::functionFinished(CodeGenFunction &CGF) {
assert(CGF.CurFn && "No function in current CodeGenFunction.")((void)0);
if (OpenMPLocThreadIDMap.count(CGF.CurFn)) {
  clearLocThreadIdInsertPt(CGF);
  OpenMPLocThreadIDMap.erase(CGF.CurFn);
}
if (FunctionUDRMap.count(CGF.CurFn) > 0) {
  for(const auto *D : FunctionUDRMap[CGF.CurFn])
    UDRMap.erase(D);
  FunctionUDRMap.erase(CGF.CurFn);
}
auto I = FunctionUDMMap.find(CGF.CurFn);
if (I != FunctionUDMMap.end()) {
  for(const auto *D : I->second)
    UDMMap.erase(D);
  FunctionUDMMap.erase(I);
}
LastprivateConditionalToTypes.erase(CGF.CurFn);
FunctionToUntiedTaskStackMap.erase(CGF.CurFn);
1546}

1548llvm::Type *CGOpenMPRuntime::getIdentTyPointerTy() {
return OMPBuilder.IdentPtr;
1550}

1552llvm::Type *CGOpenMPRuntime::getKmpc_MicroPointerTy() {
if (!Kmpc_MicroTy) {
  // Build void (*kmpc_micro)(kmp_int32 *global_tid, kmp_int32 *bound_tid,...)
  llvm::Type *MicroParams[] = {llvm::PointerType::getUnqual(CGM.Int32Ty),
                               llvm::PointerType::getUnqual(CGM.Int32Ty)};
  Kmpc_MicroTy = llvm::FunctionType::get(CGM.VoidTy, MicroParams, true);
}
return llvm::PointerType::getUnqual(Kmpc_MicroTy);
1560}

1562llvm::FunctionCallee
1563CGOpenMPRuntime::createForStaticInitFunction(unsigned IVSize, bool IVSigned) {
assert((IVSize == 32 || IVSize == 64) &&((void)0)
       "IV size is not compatible with the omp runtime")((void)0);
StringRef Name = IVSize == 32 ? (IVSigned ? "__kmpc_for_static_init_4"
                                          : "__kmpc_for_static_init_4u")
                              : (IVSigned ? "__kmpc_for_static_init_8"
                                          : "__kmpc_for_static_init_8u");
llvm::Type *ITy = IVSize == 32 ? CGM.Int32Ty : CGM.Int64Ty;
auto *PtrTy = llvm::PointerType::getUnqual(ITy);
llvm::Type *TypeParams[] = {
  getIdentTyPointerTy(),                     // loc
  CGM.Int32Ty,                               // tid
  CGM.Int32Ty,                               // schedtype
  llvm::PointerType::getUnqual(CGM.Int32Ty), // p_lastiter
  PtrTy,                                     // p_lower
  PtrTy,                                     // p_upper
  PtrTy,                                     // p_stride
  ITy,                                       // incr
  ITy                                        // chunk
};
auto *FnTy =
    llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false);
return CGM.CreateRuntimeFunction(FnTy, Name);
1586}

1588llvm::FunctionCallee
1589CGOpenMPRuntime::createDispatchInitFunction(unsigned IVSize, bool IVSigned) {
assert((IVSize == 32 || IVSize == 64) &&((void)0)
       "IV size is not compatible with the omp runtime")((void)0);
StringRef Name =
    IVSize == 32
        ? (IVSigned ? "__kmpc_dispatch_init_4" : "__kmpc_dispatch_init_4u")
        : (IVSigned ? "__kmpc_dispatch_init_8" : "__kmpc_dispatch_init_8u");
llvm::Type *ITy = IVSize == 32 ? CGM.Int32Ty : CGM.Int64Ty;
llvm::Type *TypeParams[] = { getIdentTyPointerTy(), // loc
                             CGM.Int32Ty,           // tid
                             CGM.Int32Ty,           // schedtype
                             ITy,                   // lower
                             ITy,                   // upper
                             ITy,                   // stride
                             ITy                    // chunk
};
auto *FnTy =
    llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false);
return CGM.CreateRuntimeFunction(FnTy, Name);
1608}

1610llvm::FunctionCallee
1611CGOpenMPRuntime::createDispatchFiniFunction(unsigned IVSize, bool IVSigned) {
assert((IVSize == 32 || IVSize == 64) &&((void)0)
       "IV size is not compatible with the omp runtime")((void)0);
StringRef Name =
    IVSize == 32
        ? (IVSigned ? "__kmpc_dispatch_fini_4" : "__kmpc_dispatch_fini_4u")
        : (IVSigned ? "__kmpc_dispatch_fini_8" : "__kmpc_dispatch_fini_8u");
llvm::Type *TypeParams[] = {
    getIdentTyPointerTy(), // loc
    CGM.Int32Ty,           // tid
};
auto *FnTy =
    llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg=*/false);
return CGM.CreateRuntimeFunction(FnTy, Name);
1625}

1627llvm::FunctionCallee
1628CGOpenMPRuntime::createDispatchNextFunction(unsigned IVSize, bool IVSigned) {
assert((IVSize == 32 || IVSize == 64) &&((void)0)
       "IV size is not compatible with the omp runtime")((void)0);
StringRef Name =
    IVSize == 32
        ? (IVSigned ? "__kmpc_dispatch_next_4" : "__kmpc_dispatch_next_4u")
        : (IVSigned ? "__kmpc_dispatch_next_8" : "__kmpc_dispatch_next_8u");
llvm::Type *ITy = IVSize == 32 ? CGM.Int32Ty : CGM.Int64Ty;
auto *PtrTy = llvm::PointerType::getUnqual(ITy);
llvm::Type *TypeParams[] = {
  getIdentTyPointerTy(),                     // loc
  CGM.Int32Ty,                               // tid
  llvm::PointerType::getUnqual(CGM.Int32Ty), // p_lastiter
  PtrTy,                                     // p_lower
  PtrTy,                                     // p_upper
  PtrTy                                      // p_stride
};
auto *FnTy =
    llvm::FunctionType::get(CGM.Int32Ty, TypeParams, /*isVarArg*/ false);
return CGM.CreateRuntimeFunction(FnTy, Name);
1648}

1650/// Obtain information that uniquely identifies a target entry. This
1651/// consists of the file and device IDs as well as line number associated with
1652/// the relevant entry source location.
1653static void getTargetEntryUniqueInfo(ASTContext &C, SourceLocation Loc,
                                   unsigned &DeviceID, unsigned &FileID,
                                   unsigned &LineNum) {
SourceManager &SM = C.getSourceManager();

// The loc should be always valid and have a file ID (the user cannot use
// #pragma directives in macros)

assert(Loc.isValid() && "Source location is expected to be always valid.")((void)0);

PresumedLoc PLoc = SM.getPresumedLoc(Loc);
assert(PLoc.isValid() && "Source location is expected to be always valid.")((void)0);

llvm::sys::fs::UniqueID ID;
if (auto EC = llvm::sys::fs::getUniqueID(PLoc.getFilename(), ID)) {
  PLoc = SM.getPresumedLoc(Loc, /*UseLineDirectives=*/false);
  assert(PLoc.isValid() && "Source location is expected to be always valid.")((void)0);
  if (auto EC = llvm::sys::fs::getUniqueID(PLoc.getFilename(), ID))
    SM.getDiagnostics().Report(diag::err_cannot_open_file)
        << PLoc.getFilename() << EC.message();
}

DeviceID = ID.getDevice();
FileID = ID.getFile();
LineNum = PLoc.getLine();
1678}

1680Address CGOpenMPRuntime::getAddrOfDeclareTargetVar(const VarDecl *VD) {
if (CGM.getLangOpts().OpenMPSimd)
  return Address::invalid();
llvm::Optional<OMPDeclareTargetDeclAttr::MapTypeTy> Res =
    OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(VD);
if (Res && (*Res == OMPDeclareTargetDeclAttr::MT_Link ||
            (*Res == OMPDeclareTargetDeclAttr::MT_To &&
             HasRequiresUnifiedSharedMemory))) {
  SmallString<64> PtrName;
  {
    llvm::raw_svector_ostream OS(PtrName);
    OS << CGM.getMangledName(GlobalDecl(VD));
    if (!VD->isExternallyVisible()) {
      unsigned DeviceID, FileID, Line;
      getTargetEntryUniqueInfo(CGM.getContext(),
                               VD->getCanonicalDecl()->getBeginLoc(),
                               DeviceID, FileID, Line);
      OS << llvm::format("_%x", FileID);
    }
    OS << "_decl_tgt_ref_ptr";
  }
  llvm::Value *Ptr = CGM.getModule().getNamedValue(PtrName);
  if (!Ptr) {
    QualType PtrTy = CGM.getContext().getPointerType(VD->getType());
    Ptr = getOrCreateInternalVariable(CGM.getTypes().ConvertTypeForMem(PtrTy),
                                      PtrName);

    auto *GV = cast<llvm::GlobalVariable>(Ptr);
    GV->setLinkage(llvm::GlobalValue::WeakAnyLinkage);

    if (!CGM.getLangOpts().OpenMPIsDevice)
      GV->setInitializer(CGM.GetAddrOfGlobal(VD));
    registerTargetGlobalVariable(VD, cast<llvm::Constant>(Ptr));
  }
  return Address(Ptr, CGM.getContext().getDeclAlign(VD));
}
return Address::invalid();
1717}

1719llvm::Constant *
1720CGOpenMPRuntime::getOrCreateThreadPrivateCache(const VarDecl *VD) {
assert(!CGM.getLangOpts().OpenMPUseTLS ||((void)0)
       !CGM.getContext().getTargetInfo().isTLSSupported())((void)0);
// Lookup the entry, lazily creating it if necessary.
std::string Suffix = getName({"cache", ""});
return getOrCreateInternalVariable(
    CGM.Int8PtrPtrTy, Twine(CGM.getMangledName(VD)).concat(Suffix));
1727}

1729Address CGOpenMPRuntime::getAddrOfThreadPrivate(CodeGenFunction &CGF,
                                              const VarDecl *VD,
                                              Address VDAddr,
                                              SourceLocation Loc) {
if (CGM.getLangOpts().OpenMPUseTLS &&
    CGM.getContext().getTargetInfo().isTLSSupported())
  return VDAddr;

llvm::Type *VarTy = VDAddr.getElementType();
llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc),
                       CGF.Builder.CreatePointerCast(VDAddr.getPointer(),
                                                     CGM.Int8PtrTy),
                       CGM.getSize(CGM.GetTargetTypeStoreSize(VarTy)),
                       getOrCreateThreadPrivateCache(VD)};
return Address(CGF.EmitRuntimeCall(
                   OMPBuilder.getOrCreateRuntimeFunction(
                       CGM.getModule(), OMPRTL___kmpc_threadprivate_cached),
                   Args),
               VDAddr.getAlignment());
1748}

1750void CGOpenMPRuntime::emitThreadPrivateVarInit(
  CodeGenFunction &CGF, Address VDAddr, llvm::Value *Ctor,
  llvm::Value *CopyCtor, llvm::Value *Dtor, SourceLocation Loc) {
// Call kmp_int32 __kmpc_global_thread_num(&loc) to init OpenMP runtime
// library.
llvm::Value *OMPLoc = emitUpdateLocation(CGF, Loc);
CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                        CGM.getModule(), OMPRTL___kmpc_global_thread_num),
                    OMPLoc);
// Call __kmpc_threadprivate_register(&loc, &var, ctor, cctor/*NULL*/, dtor)
// to register constructor/destructor for variable.
llvm::Value *Args[] = {
    OMPLoc, CGF.Builder.CreatePointerCast(VDAddr.getPointer(), CGM.VoidPtrTy),
    Ctor, CopyCtor, Dtor};
CGF.EmitRuntimeCall(
    OMPBuilder.getOrCreateRuntimeFunction(
        CGM.getModule(), OMPRTL___kmpc_threadprivate_register),
    Args);
1768}

1770llvm::Function *CGOpenMPRuntime::emitThreadPrivateVarDefinition(
  const VarDecl *VD, Address VDAddr, SourceLocation Loc,
  bool PerformInit, CodeGenFunction *CGF) {
if (CGM.getLangOpts().OpenMPUseTLS &&
    CGM.getContext().getTargetInfo().isTLSSupported())
  return nullptr;

VD = VD->getDefinition(CGM.getContext());
if (VD && ThreadPrivateWithDefinition.insert(CGM.getMangledName(VD)).second) {
  QualType ASTTy = VD->getType();

  llvm::Value *Ctor = nullptr, *CopyCtor = nullptr, *Dtor = nullptr;
  const Expr *Init = VD->getAnyInitializer();
  if (CGM.getLangOpts().CPlusPlus && PerformInit) {
    // Generate function that re-emits the declaration's initializer into the
    // threadprivate copy of the variable VD
    CodeGenFunction CtorCGF(CGM);
    FunctionArgList Args;
    ImplicitParamDecl Dst(CGM.getContext(), /*DC=*/nullptr, Loc,
                          /*Id=*/nullptr, CGM.getContext().VoidPtrTy,
                          ImplicitParamDecl::Other);
    Args.push_back(&Dst);

    const auto &FI = CGM.getTypes().arrangeBuiltinFunctionDeclaration(
        CGM.getContext().VoidPtrTy, Args);
    llvm::FunctionType *FTy = CGM.getTypes().GetFunctionType(FI);
    std::string Name = getName({"__kmpc_global_ctor_", ""});
    llvm::Function *Fn =
        CGM.CreateGlobalInitOrCleanUpFunction(FTy, Name, FI, Loc);
    CtorCGF.StartFunction(GlobalDecl(), CGM.getContext().VoidPtrTy, Fn, FI,
                          Args, Loc, Loc);
    llvm::Value *ArgVal = CtorCGF.EmitLoadOfScalar(
        CtorCGF.GetAddrOfLocalVar(&Dst), /*Volatile=*/false,
        CGM.getContext().VoidPtrTy, Dst.getLocation());
    Address Arg = Address(ArgVal, VDAddr.getAlignment());
    Arg = CtorCGF.Builder.CreateElementBitCast(
        Arg, CtorCGF.ConvertTypeForMem(ASTTy));
    CtorCGF.EmitAnyExprToMem(Init, Arg, Init->getType().getQualifiers(),
                             /*IsInitializer=*/true);
    ArgVal = CtorCGF.EmitLoadOfScalar(
        CtorCGF.GetAddrOfLocalVar(&Dst), /*Volatile=*/false,
        CGM.getContext().VoidPtrTy, Dst.getLocation());
    CtorCGF.Builder.CreateStore(ArgVal, CtorCGF.ReturnValue);
    CtorCGF.FinishFunction();
    Ctor = Fn;
  }
  if (VD->getType().isDestructedType() != QualType::DK_none) {
    // Generate function that emits destructor call for the threadprivate copy
    // of the variable VD
    CodeGenFunction DtorCGF(CGM);
    FunctionArgList Args;
    ImplicitParamDecl Dst(CGM.getContext(), /*DC=*/nullptr, Loc,
                          /*Id=*/nullptr, CGM.getContext().VoidPtrTy,
                          ImplicitParamDecl::Other);
    Args.push_back(&Dst);

    const auto &FI = CGM.getTypes().arrangeBuiltinFunctionDeclaration(
        CGM.getContext().VoidTy, Args);
    llvm::FunctionType *FTy = CGM.getTypes().GetFunctionType(FI);
    std::string Name = getName({"__kmpc_global_dtor_", ""});
    llvm::Function *Fn =
        CGM.CreateGlobalInitOrCleanUpFunction(FTy, Name, FI, Loc);
    auto NL = ApplyDebugLocation::CreateEmpty(DtorCGF);
    DtorCGF.StartFunction(GlobalDecl(), CGM.getContext().VoidTy, Fn, FI, Args,
                          Loc, Loc);
    // Create a scope with an artificial location for the body of this function.
    auto AL = ApplyDebugLocation::CreateArtificial(DtorCGF);
    llvm::Value *ArgVal = DtorCGF.EmitLoadOfScalar(
        DtorCGF.GetAddrOfLocalVar(&Dst),
        /*Volatile=*/false, CGM.getContext().VoidPtrTy, Dst.getLocation());
    DtorCGF.emitDestroy(Address(ArgVal, VDAddr.getAlignment()), ASTTy,
                        DtorCGF.getDestroyer(ASTTy.isDestructedType()),
                        DtorCGF.needsEHCleanup(ASTTy.isDestructedType()));
    DtorCGF.FinishFunction();
    Dtor = Fn;
  }
  // Do not emit init function if it is not required.
  if (!Ctor && !Dtor)
    return nullptr;

  llvm::Type *CopyCtorTyArgs[] = {CGM.VoidPtrTy, CGM.VoidPtrTy};
  auto *CopyCtorTy = llvm::FunctionType::get(CGM.VoidPtrTy, CopyCtorTyArgs,
                                             /*isVarArg=*/false)
                         ->getPointerTo();
  // Copying constructor for the threadprivate variable.
  // Must be NULL - reserved by runtime, but currently it requires that this
  // parameter is always NULL. Otherwise it fires assertion.
  CopyCtor = llvm::Constant::getNullValue(CopyCtorTy);
  if (Ctor == nullptr) {
    auto *CtorTy = llvm::FunctionType::get(CGM.VoidPtrTy, CGM.VoidPtrTy,
                                           /*isVarArg=*/false)
                       ->getPointerTo();
    Ctor = llvm::Constant::getNullValue(CtorTy);
  }
  if (Dtor == nullptr) {
    auto *DtorTy = llvm::FunctionType::get(CGM.VoidTy, CGM.VoidPtrTy,
                                           /*isVarArg=*/false)
                       ->getPointerTo();
    Dtor = llvm::Constant::getNullValue(DtorTy);
  }
  if (!CGF) {
    auto *InitFunctionTy =
        llvm::FunctionType::get(CGM.VoidTy, /*isVarArg*/ false);
    std::string Name = getName({"__omp_threadprivate_init_", ""});
    llvm::Function *InitFunction = CGM.CreateGlobalInitOrCleanUpFunction(
        InitFunctionTy, Name, CGM.getTypes().arrangeNullaryFunction());
    CodeGenFunction InitCGF(CGM);
    FunctionArgList ArgList;
    InitCGF.StartFunction(GlobalDecl(), CGM.getContext().VoidTy, InitFunction,
                          CGM.getTypes().arrangeNullaryFunction(), ArgList,
                          Loc, Loc);
    emitThreadPrivateVarInit(InitCGF, VDAddr, Ctor, CopyCtor, Dtor, Loc);
    InitCGF.FinishFunction();
    return InitFunction;
  }
  emitThreadPrivateVarInit(*CGF, VDAddr, Ctor, CopyCtor, Dtor, Loc);
}
return nullptr;
1888}

1890bool CGOpenMPRuntime::emitDeclareTargetVarDefinition(const VarDecl *VD,
                                                   llvm::GlobalVariable *Addr,
                                                   bool PerformInit) {
if (CGM.getLangOpts().OMPTargetTriples.empty() &&
    !CGM.getLangOpts().OpenMPIsDevice)
  return false;
Optional<OMPDeclareTargetDeclAttr::MapTypeTy> Res =
    OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(VD);
if (!Res || *Res == OMPDeclareTargetDeclAttr::MT_Link ||
    (*Res == OMPDeclareTargetDeclAttr::MT_To &&
     HasRequiresUnifiedSharedMemory))
  return CGM.getLangOpts().OpenMPIsDevice;
VD = VD->getDefinition(CGM.getContext());
assert(VD && "Unknown VarDecl")((void)0);

if (!DeclareTargetWithDefinition.insert(CGM.getMangledName(VD)).second)
  return CGM.getLangOpts().OpenMPIsDevice;

QualType ASTTy = VD->getType();
SourceLocation Loc = VD->getCanonicalDecl()->getBeginLoc();

// Produce the unique prefix to identify the new target regions. We use
// the source location of the variable declaration which we know to not
// conflict with any target region.
unsigned DeviceID;
unsigned FileID;
unsigned Line;
getTargetEntryUniqueInfo(CGM.getContext(), Loc, DeviceID, FileID, Line);
SmallString<128> Buffer, Out;
{
  llvm::raw_svector_ostream OS(Buffer);
  OS << "__omp_offloading_" << llvm::format("_%x", DeviceID)
     << llvm::format("_%x_", FileID) << VD->getName() << "_l" << Line;
}

const Expr *Init = VD->getAnyInitializer();
if (CGM.getLangOpts().CPlusPlus && PerformInit) {
  llvm::Constant *Ctor;
  llvm::Constant *ID;
  if (CGM.getLangOpts().OpenMPIsDevice) {
    // Generate function that re-emits the declaration's initializer into
    // the threadprivate copy of the variable VD
    CodeGenFunction CtorCGF(CGM);

    const CGFunctionInfo &FI = CGM.getTypes().arrangeNullaryFunction();
    llvm::FunctionType *FTy = CGM.getTypes().GetFunctionType(FI);
    llvm::Function *Fn = CGM.CreateGlobalInitOrCleanUpFunction(
        FTy, Twine(Buffer, "_ctor"), FI, Loc);
    auto NL = ApplyDebugLocation::CreateEmpty(CtorCGF);
    CtorCGF.StartFunction(GlobalDecl(), CGM.getContext().VoidTy, Fn, FI,
                          FunctionArgList(), Loc, Loc);
    auto AL = ApplyDebugLocation::CreateArtificial(CtorCGF);
    CtorCGF.EmitAnyExprToMem(Init,
                             Address(Addr, CGM.getContext().getDeclAlign(VD)),
                             Init->getType().getQualifiers(),
                             /*IsInitializer=*/true);
    CtorCGF.FinishFunction();
    Ctor = Fn;
    ID = llvm::ConstantExpr::getBitCast(Fn, CGM.Int8PtrTy);
    CGM.addUsedGlobal(cast<llvm::GlobalValue>(Ctor));
  } else {
    Ctor = new llvm::GlobalVariable(
        CGM.getModule(), CGM.Int8Ty, /*isConstant=*/true,
        llvm::GlobalValue::PrivateLinkage,
        llvm::Constant::getNullValue(CGM.Int8Ty), Twine(Buffer, "_ctor"));
    ID = Ctor;
  }

  // Register the information for the entry associated with the constructor.
  Out.clear();
  OffloadEntriesInfoManager.registerTargetRegionEntryInfo(
      DeviceID, FileID, Twine(Buffer, "_ctor").toStringRef(Out), Line, Ctor,
      ID, OffloadEntriesInfoManagerTy::OMPTargetRegionEntryCtor);
}
if (VD->getType().isDestructedType() != QualType::DK_none) {
  llvm::Constant *Dtor;
  llvm::Constant *ID;
  if (CGM.getLangOpts().OpenMPIsDevice) {
    // Generate function that emits destructor call for the threadprivate
    // copy of the variable VD
    CodeGenFunction DtorCGF(CGM);

    const CGFunctionInfo &FI = CGM.getTypes().arrangeNullaryFunction();
    llvm::FunctionType *FTy = CGM.getTypes().GetFunctionType(FI);
    llvm::Function *Fn = CGM.CreateGlobalInitOrCleanUpFunction(
        FTy, Twine(Buffer, "_dtor"), FI, Loc);
    auto NL = ApplyDebugLocation::CreateEmpty(DtorCGF);
    DtorCGF.StartFunction(GlobalDecl(), CGM.getContext().VoidTy, Fn, FI,
                          FunctionArgList(), Loc, Loc);
    // Create a scope with an artificial location for the body of this
    // function.
    auto AL = ApplyDebugLocation::CreateArtificial(DtorCGF);
    DtorCGF.emitDestroy(Address(Addr, CGM.getContext().getDeclAlign(VD)),
                        ASTTy, DtorCGF.getDestroyer(ASTTy.isDestructedType()),
                        DtorCGF.needsEHCleanup(ASTTy.isDestructedType()));
    DtorCGF.FinishFunction();
    Dtor = Fn;
    ID = llvm::ConstantExpr::getBitCast(Fn, CGM.Int8PtrTy);
    CGM.addUsedGlobal(cast<llvm::GlobalValue>(Dtor));
  } else {
    Dtor = new llvm::GlobalVariable(
        CGM.getModule(), CGM.Int8Ty, /*isConstant=*/true,
        llvm::GlobalValue::PrivateLinkage,
        llvm::Constant::getNullValue(CGM.Int8Ty), Twine(Buffer, "_dtor"));
    ID = Dtor;
  }
  // Register the information for the entry associated with the destructor.
  Out.clear();
  OffloadEntriesInfoManager.registerTargetRegionEntryInfo(
      DeviceID, FileID, Twine(Buffer, "_dtor").toStringRef(Out), Line, Dtor,
      ID, OffloadEntriesInfoManagerTy::OMPTargetRegionEntryDtor);
}
return CGM.getLangOpts().OpenMPIsDevice;
2003}

2005Address CGOpenMPRuntime::getAddrOfArtificialThreadPrivate(CodeGenFunction &CGF,
                                                        QualType VarType,
                                                        StringRef Name) {
std::string Suffix = getName({"artificial", ""});
llvm::Type *VarLVType = CGF.ConvertTypeForMem(VarType);
llvm::Value *GAddr =
    getOrCreateInternalVariable(VarLVType, Twine(Name).concat(Suffix));
if (CGM.getLangOpts().OpenMP && CGM.getLangOpts().OpenMPUseTLS &&
    CGM.getTarget().isTLSSupported()) {
  cast<llvm::GlobalVariable>(GAddr)->setThreadLocal(/*Val=*/true);
  return Address(GAddr, CGM.getContext().getTypeAlignInChars(VarType));
}
std::string CacheSuffix = getName({"cache", ""});
llvm::Value *Args[] = {
    emitUpdateLocation(CGF, SourceLocation()),
    getThreadID(CGF, SourceLocation()),
    CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(GAddr, CGM.VoidPtrTy),
    CGF.Builder.CreateIntCast(CGF.getTypeSize(VarType), CGM.SizeTy,
                              /*isSigned=*/false),
    getOrCreateInternalVariable(
        CGM.VoidPtrPtrTy, Twine(Name).concat(Suffix).concat(CacheSuffix))};
return Address(
    CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
        CGF.EmitRuntimeCall(
            OMPBuilder.getOrCreateRuntimeFunction(
                CGM.getModule(), OMPRTL___kmpc_threadprivate_cached),
            Args),
        VarLVType->getPointerTo(/*AddrSpace=*/0)),
    CGM.getContext().getTypeAlignInChars(VarType));
2034}

2036void CGOpenMPRuntime::emitIfClause(CodeGenFunction &CGF, const Expr *Cond,
                                 const RegionCodeGenTy &ThenGen,
                                 const RegionCodeGenTy &ElseGen) {
CodeGenFunction::LexicalScope ConditionScope(CGF, Cond->getSourceRange());

// If the condition constant folds and can be elided, try to avoid emitting
// the condition and the dead arm of the if/else.
bool CondConstant;
if (CGF.ConstantFoldsToSimpleInteger(Cond, CondConstant)) {
  if (CondConstant)
    ThenGen(CGF);
  else
    ElseGen(CGF);
  return;
}

// Otherwise, the condition did not fold, or we couldn't elide it.  Just
// emit the conditional branch.
llvm::BasicBlock *ThenBlock = CGF.createBasicBlock("omp_if.then");
llvm::BasicBlock *ElseBlock = CGF.createBasicBlock("omp_if.else");
llvm::BasicBlock *ContBlock = CGF.createBasicBlock("omp_if.end");
CGF.EmitBranchOnBoolExpr(Cond, ThenBlock, ElseBlock, /*TrueCount=*/0);

// Emit the 'then' code.
CGF.EmitBlock(ThenBlock);
ThenGen(CGF);
CGF.EmitBranch(ContBlock);
// Emit the 'else' code if present.
// There is no need to emit line number for unconditional branch.
(void)ApplyDebugLocation::CreateEmpty(CGF);
CGF.EmitBlock(ElseBlock);
ElseGen(CGF);
// There is no need to emit line number for unconditional branch.
(void)ApplyDebugLocation::CreateEmpty(CGF);
CGF.EmitBranch(ContBlock);
// Emit the continuation block for code after the if.
CGF.EmitBlock(ContBlock, /*IsFinished=*/true);
2073}

2075void CGOpenMPRuntime::emitParallelCall(CodeGenFunction &CGF, SourceLocation Loc,
                                     llvm::Function *OutlinedFn,
                                     ArrayRef<llvm::Value *> CapturedVars,
                                     const Expr *IfCond) {
if (!CGF.HaveInsertPoint())
  return;
llvm::Value *RTLoc = emitUpdateLocation(CGF, Loc);
auto &M = CGM.getModule();
auto &&ThenGen = [&M, OutlinedFn, CapturedVars, RTLoc,
                  this](CodeGenFunction &CGF, PrePostActionTy &) {
  // Build call __kmpc_fork_call(loc, n, microtask, var1, .., varn);
  CGOpenMPRuntime &RT = CGF.CGM.getOpenMPRuntime();
  llvm::Value *Args[] = {
      RTLoc,
      CGF.Builder.getInt32(CapturedVars.size()), // Number of captured vars
      CGF.Builder.CreateBitCast(OutlinedFn, RT.getKmpc_MicroPointerTy())};
  llvm::SmallVector<llvm::Value *, 16> RealArgs;
  RealArgs.append(std::begin(Args), std::end(Args));
  RealArgs.append(CapturedVars.begin(), CapturedVars.end());

  llvm::FunctionCallee RTLFn =
      OMPBuilder.getOrCreateRuntimeFunction(M, OMPRTL___kmpc_fork_call);
  CGF.EmitRuntimeCall(RTLFn, RealArgs);
};
auto &&ElseGen = [&M, OutlinedFn, CapturedVars, RTLoc, Loc,
                  this](CodeGenFunction &CGF, PrePostActionTy &) {
  CGOpenMPRuntime &RT = CGF.CGM.getOpenMPRuntime();
  llvm::Value *ThreadID = RT.getThreadID(CGF, Loc);
  // Build calls:
  // __kmpc_serialized_parallel(&Loc, GTid);
  llvm::Value *Args[] = {RTLoc, ThreadID};
  CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                          M, OMPRTL___kmpc_serialized_parallel),
                      Args);

  // OutlinedFn(&GTid, &zero_bound, CapturedStruct);
  Address ThreadIDAddr = RT.emitThreadIDAddress(CGF, Loc);
  Address ZeroAddrBound =
      CGF.CreateDefaultAlignTempAlloca(CGF.Int32Ty,
                                       /*Name=*/".bound.zero.addr");
  CGF.InitTempAlloca(ZeroAddrBound, CGF.Builder.getInt32(/*C*/ 0));
  llvm::SmallVector<llvm::Value *, 16> OutlinedFnArgs;
  // ThreadId for serialized parallels is 0.
  OutlinedFnArgs.push_back(ThreadIDAddr.getPointer());
  OutlinedFnArgs.push_back(ZeroAddrBound.getPointer());
  OutlinedFnArgs.append(CapturedVars.begin(), CapturedVars.end());

  // Ensure we do not inline the function. This is trivially true for the ones
  // passed to __kmpc_fork_call but the ones called in serialized regions
  // could be inlined. This is not a perfect but it is closer to the invariant
  // we want, namely, every data environment starts with a new function.
  // TODO: We should pass the if condition to the runtime function and do the
  //       handling there. Much cleaner code.
  OutlinedFn->removeFnAttr(llvm::Attribute::AlwaysInline);
  OutlinedFn->addFnAttr(llvm::Attribute::NoInline);
  RT.emitOutlinedFunctionCall(CGF, Loc, OutlinedFn, OutlinedFnArgs);

  // __kmpc_end_serialized_parallel(&Loc, GTid);
  llvm::Value *EndArgs[] = {RT.emitUpdateLocation(CGF, Loc), ThreadID};
  CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                          M, OMPRTL___kmpc_end_serialized_parallel),
                      EndArgs);
};
if (IfCond) {
  emitIfClause(CGF, IfCond, ThenGen, ElseGen);
} else {
  RegionCodeGenTy ThenRCG(ThenGen);
  ThenRCG(CGF);
}
2144}

2146// If we're inside an (outlined) parallel region, use the region info's
2147// thread-ID variable (it is passed in a first argument of the outlined function
2148// as "kmp_int32 *gtid"). Otherwise, if we're not inside parallel region, but in
2149// regular serial code region, get thread ID by calling kmp_int32
2150// kmpc_global_thread_num(ident_t *loc), stash this thread ID in a temporary and
2151// return the address of that temp.
2152Address CGOpenMPRuntime::emitThreadIDAddress(CodeGenFunction &CGF,
                                           SourceLocation Loc) {
if (auto *OMPRegionInfo =
        dyn_cast_or_null<CGOpenMPRegionInfo>(CGF.CapturedStmtInfo))
  if (OMPRegionInfo->getThreadIDVariable())
    return OMPRegionInfo->getThreadIDVariableLValue(CGF).getAddress(CGF);

llvm::Value *ThreadID = getThreadID(CGF, Loc);
QualType Int32Ty =
    CGF.getContext().getIntTypeForBitwidth(/*DestWidth*/ 32, /*Signed*/ true);
Address ThreadIDTemp = CGF.CreateMemTemp(Int32Ty, /*Name*/ ".threadid_temp.");
CGF.EmitStoreOfScalar(ThreadID,
                      CGF.MakeAddrLValue(ThreadIDTemp, Int32Ty));

return ThreadIDTemp;
2167}

2169llvm::Constant *CGOpenMPRuntime::getOrCreateInternalVariable(
  llvm::Type *Ty, const llvm::Twine &Name, unsigned AddressSpace) {
SmallString<256> Buffer;
llvm::raw_svector_ostream Out(Buffer);
Out << Name;
StringRef RuntimeName = Out.str();
auto &Elem = *InternalVars.try_emplace(RuntimeName, nullptr).first;
if (Elem.second) {
  assert(Elem.second->getType()->getPointerElementType() == Ty &&((void)0)
         "OMP internal variable has different type than requested")((void)0);
  return &*Elem.second;
}

return Elem.second = new llvm::GlobalVariable(
           CGM.getModule(), Ty, /*IsConstant*/ false,
           llvm::GlobalValue::CommonLinkage, llvm::Constant::getNullValue(Ty),
           Elem.first(), /*InsertBefore=*/nullptr,
           llvm::GlobalValue::NotThreadLocal, AddressSpace);
2187}

2189llvm::Value *CGOpenMPRuntime::getCriticalRegionLock(StringRef CriticalName) {
std::string Prefix = Twine("gomp_critical_user_", CriticalName).str();
std::string Name = getName({Prefix, "var"});
return getOrCreateInternalVariable(KmpCriticalNameTy, Name);
2193}

2195namespace {
2196/// Common pre(post)-action for different OpenMP constructs.
2197class CommonActionTy final : public PrePostActionTy {
llvm::FunctionCallee EnterCallee;
ArrayRef<llvm::Value *> EnterArgs;
llvm::FunctionCallee ExitCallee;
ArrayRef<llvm::Value *> ExitArgs;
bool Conditional;
llvm::BasicBlock *ContBlock = nullptr;

2205public:
CommonActionTy(llvm::FunctionCallee EnterCallee,
               ArrayRef<llvm::Value *> EnterArgs,
               llvm::FunctionCallee ExitCallee,
               ArrayRef<llvm::Value *> ExitArgs, bool Conditional = false)
    : EnterCallee(EnterCallee), EnterArgs(EnterArgs), ExitCallee(ExitCallee),
      ExitArgs(ExitArgs), Conditional(Conditional) {}
void Enter(CodeGenFunction &CGF) override {
  llvm::Value *EnterRes = CGF.EmitRuntimeCall(EnterCallee, EnterArgs);
  if (Conditional) {
    llvm::Value *CallBool = CGF.Builder.CreateIsNotNull(EnterRes);
    auto *ThenBlock = CGF.createBasicBlock("omp_if.then");
    ContBlock = CGF.createBasicBlock("omp_if.end");
    // Generate the branch (If-stmt)
    CGF.Builder.CreateCondBr(CallBool, ThenBlock, ContBlock);
    CGF.EmitBlock(ThenBlock);
  }
}
void Done(CodeGenFunction &CGF) {
  // Emit the rest of blocks/branches
  CGF.EmitBranch(ContBlock);
  CGF.EmitBlock(ContBlock, true);
}
void Exit(CodeGenFunction &CGF) override {
  CGF.EmitRuntimeCall(ExitCallee, ExitArgs);
}
2231};
2232} // anonymous namespace

2234void CGOpenMPRuntime::emitCriticalRegion(CodeGenFunction &CGF,
                                       StringRef CriticalName,
                                       const RegionCodeGenTy &CriticalOpGen,
                                       SourceLocation Loc, const Expr *Hint) {
// __kmpc_critical[_with_hint](ident_t *, gtid, Lock[, hint]);
// CriticalOpGen();
// __kmpc_end_critical(ident_t *, gtid, Lock);
// Prepare arguments and build a call to __kmpc_critical
if (!CGF.HaveInsertPoint())
  return;
llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc),
                       getCriticalRegionLock(CriticalName)};
llvm::SmallVector<llvm::Value *, 4> EnterArgs(std::begin(Args),
                                              std::end(Args));
if (Hint) {
  EnterArgs.push_back(CGF.Builder.CreateIntCast(
      CGF.EmitScalarExpr(Hint), CGM.Int32Ty, /*isSigned=*/false));
}
CommonActionTy Action(
    OMPBuilder.getOrCreateRuntimeFunction(
        CGM.getModule(),
        Hint ? OMPRTL___kmpc_critical_with_hint : OMPRTL___kmpc_critical),
    EnterArgs,
    OMPBuilder.getOrCreateRuntimeFunction(CGM.getModule(),
                                          OMPRTL___kmpc_end_critical),
    Args);
CriticalOpGen.setAction(Action);
emitInlinedDirective(CGF, OMPD_critical, CriticalOpGen);
2262}

2264void CGOpenMPRuntime::emitMasterRegion(CodeGenFunction &CGF,
                                     const RegionCodeGenTy &MasterOpGen,
                                     SourceLocation Loc) {
if (!CGF.HaveInsertPoint())
  return;
// if(__kmpc_master(ident_t *, gtid)) {
//   MasterOpGen();
//   __kmpc_end_master(ident_t *, gtid);
// }
// Prepare arguments and build a call to __kmpc_master
llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc)};
CommonActionTy Action(OMPBuilder.getOrCreateRuntimeFunction(
                          CGM.getModule(), OMPRTL___kmpc_master),
                      Args,
                      OMPBuilder.getOrCreateRuntimeFunction(
                          CGM.getModule(), OMPRTL___kmpc_end_master),
                      Args,
                      /*Conditional=*/true);
MasterOpGen.setAction(Action);
emitInlinedDirective(CGF, OMPD_master, MasterOpGen);
Action.Done(CGF);
2285}

2287void CGOpenMPRuntime::emitMaskedRegion(CodeGenFunction &CGF,
                                     const RegionCodeGenTy &MaskedOpGen,
                                     SourceLocation Loc, const Expr *Filter) {
if (!CGF.HaveInsertPoint())
  return;
// if(__kmpc_masked(ident_t *, gtid, filter)) {
//   MaskedOpGen();
//   __kmpc_end_masked(iden_t *, gtid);
// }
// Prepare arguments and build a call to __kmpc_masked
llvm::Value *FilterVal = Filter
                             ? CGF.EmitScalarExpr(Filter, CGF.Int32Ty)
                             : llvm::ConstantInt::get(CGM.Int32Ty, /*V=*/0);
llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc),
                       FilterVal};
llvm::Value *ArgsEnd[] = {emitUpdateLocation(CGF, Loc),
                          getThreadID(CGF, Loc)};
CommonActionTy Action(OMPBuilder.getOrCreateRuntimeFunction(
                          CGM.getModule(), OMPRTL___kmpc_masked),
                      Args,
                      OMPBuilder.getOrCreateRuntimeFunction(
                          CGM.getModule(), OMPRTL___kmpc_end_masked),
                      ArgsEnd,
                      /*Conditional=*/true);
MaskedOpGen.setAction(Action);
emitInlinedDirective(CGF, OMPD_masked, MaskedOpGen);
Action.Done(CGF);
2314}

2316void CGOpenMPRuntime::emitTaskyieldCall(CodeGenFunction &CGF,
                                      SourceLocation Loc) {
if (!CGF.HaveInsertPoint())
  return;
if (CGF.CGM.getLangOpts().OpenMPIRBuilder) {
  OMPBuilder.createTaskyield(CGF.Builder);
} else {
  // Build call __kmpc_omp_taskyield(loc, thread_id, 0);
  llvm::Value *Args[] = {
      emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc),
      llvm::ConstantInt::get(CGM.IntTy, /*V=*/0, /*isSigned=*/true)};
  CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                          CGM.getModule(), OMPRTL___kmpc_omp_taskyield),
                      Args);
}

if (auto *Region = dyn_cast_or_null<CGOpenMPRegionInfo>(CGF.CapturedStmtInfo))
  Region->emitUntiedSwitch(CGF);
2334}

2336void CGOpenMPRuntime::emitTaskgroupRegion(CodeGenFunction &CGF,
                                        const RegionCodeGenTy &TaskgroupOpGen,
                                        SourceLocation Loc) {
if (!CGF.HaveInsertPoint())
  return;
// __kmpc_taskgroup(ident_t *, gtid);
// TaskgroupOpGen();
// __kmpc_end_taskgroup(ident_t *, gtid);
// Prepare arguments and build a call to __kmpc_taskgroup
llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc)};
CommonActionTy Action(OMPBuilder.getOrCreateRuntimeFunction(
                          CGM.getModule(), OMPRTL___kmpc_taskgroup),
                      Args,
                      OMPBuilder.getOrCreateRuntimeFunction(
                          CGM.getModule(), OMPRTL___kmpc_end_taskgroup),
                      Args);
TaskgroupOpGen.setAction(Action);
emitInlinedDirective(CGF, OMPD_taskgroup, TaskgroupOpGen);
2354}

2356/// Given an array of pointers to variables, project the address of a
2357/// given variable.
2358static Address emitAddrOfVarFromArray(CodeGenFunction &CGF, Address Array,
                                    unsigned Index, const VarDecl *Var) {
// Pull out the pointer to the variable.
Address PtrAddr = CGF.Builder.CreateConstArrayGEP(Array, Index);
llvm::Value *Ptr = CGF.Builder.CreateLoad(PtrAddr);

Address Addr = Address(Ptr, CGF.getContext().getDeclAlign(Var));
Addr = CGF.Builder.CreateElementBitCast(
    Addr, CGF.ConvertTypeForMem(Var->getType()));
return Addr;
2368}

2370static llvm::Value *emitCopyprivateCopyFunction(
  CodeGenModule &CGM, llvm::Type *ArgsType,
  ArrayRef<const Expr *> CopyprivateVars, ArrayRef<const Expr *> DestExprs,
  ArrayRef<const Expr *> SrcExprs, ArrayRef<const Expr *> AssignmentOps,
  SourceLocation Loc) {
ASTContext &C = CGM.getContext();
// void copy_func(void *LHSArg, void *RHSArg);
FunctionArgList Args;
ImplicitParamDecl LHSArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, C.VoidPtrTy,
                         ImplicitParamDecl::Other);
ImplicitParamDecl RHSArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, C.VoidPtrTy,
                         ImplicitParamDecl::Other);
Args.push_back(&LHSArg);
Args.push_back(&RHSArg);
const auto &CGFI =
    CGM.getTypes().arrangeBuiltinFunctionDeclaration(C.VoidTy, Args);
std::string Name =
    CGM.getOpenMPRuntime().getName({"omp", "copyprivate", "copy_func"});
auto *Fn = llvm::Function::Create(CGM.getTypes().GetFunctionType(CGFI),
                                  llvm::GlobalValue::InternalLinkage, Name,
                                  &CGM.getModule());
CGM.SetInternalFunctionAttributes(GlobalDecl(), Fn, CGFI);
Fn->setDoesNotRecurse();
CodeGenFunction CGF(CGM);
CGF.StartFunction(GlobalDecl(), C.VoidTy, Fn, CGFI, Args, Loc, Loc);
// Dest = (void*[n])(LHSArg);
// Src = (void*[n])(RHSArg);
Address LHS(CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
    CGF.Builder.CreateLoad(CGF.GetAddrOfLocalVar(&LHSArg)),
    ArgsType), CGF.getPointerAlign());
Address RHS(CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
    CGF.Builder.CreateLoad(CGF.GetAddrOfLocalVar(&RHSArg)),
    ArgsType), CGF.getPointerAlign());
// *(Type0*)Dst[0] = *(Type0*)Src[0];
// *(Type1*)Dst[1] = *(Type1*)Src[1];
// ...
// *(Typen*)Dst[n] = *(Typen*)Src[n];
for (unsigned I = 0, E = AssignmentOps.size(); I < E; ++I) {
  const auto *DestVar =
      cast<VarDecl>(cast<DeclRefExpr>(DestExprs[I])->getDecl());
  Address DestAddr = emitAddrOfVarFromArray(CGF, LHS, I, DestVar);

  const auto *SrcVar =
      cast<VarDecl>(cast<DeclRefExpr>(SrcExprs[I])->getDecl());
  Address SrcAddr = emitAddrOfVarFromArray(CGF, RHS, I, SrcVar);

  const auto *VD = cast<DeclRefExpr>(CopyprivateVars[I])->getDecl();
  QualType Type = VD->getType();
  CGF.EmitOMPCopy(Type, DestAddr, SrcAddr, DestVar, SrcVar, AssignmentOps[I]);
}
CGF.FinishFunction();
return Fn;
2422}

2424void CGOpenMPRuntime::emitSingleRegion(CodeGenFunction &CGF,
                                     const RegionCodeGenTy &SingleOpGen,
                                     SourceLocation Loc,
                                     ArrayRef<const Expr *> CopyprivateVars,
                                     ArrayRef<const Expr *> SrcExprs,
                                     ArrayRef<const Expr *> DstExprs,
                                     ArrayRef<const Expr *> AssignmentOps) {
if (!CGF.HaveInsertPoint())
  return;
assert(CopyprivateVars.size() == SrcExprs.size() &&((void)0)
       CopyprivateVars.size() == DstExprs.size() &&((void)0)
       CopyprivateVars.size() == AssignmentOps.size())((void)0);
ASTContext &C = CGM.getContext();
// int32 did_it = 0;
// if(__kmpc_single(ident_t *, gtid)) {
//   SingleOpGen();
//   __kmpc_end_single(ident_t *, gtid);
//   did_it = 1;
// }
// call __kmpc_copyprivate(ident_t *, gtid, <buf_size>, <copyprivate list>,
// <copy_func>, did_it);

Address DidIt = Address::invalid();
if (!CopyprivateVars.empty()) {
  // int32 did_it = 0;
  QualType KmpInt32Ty =
      C.getIntTypeForBitwidth(/*DestWidth=*/32, /*Signed=*/1);
  DidIt = CGF.CreateMemTemp(KmpInt32Ty, ".omp.copyprivate.did_it");
  CGF.Builder.CreateStore(CGF.Builder.getInt32(0), DidIt);
}
// Prepare arguments and build a call to __kmpc_single
llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc)};
CommonActionTy Action(OMPBuilder.getOrCreateRuntimeFunction(
                          CGM.getModule(), OMPRTL___kmpc_single),
                      Args,
                      OMPBuilder.getOrCreateRuntimeFunction(
                          CGM.getModule(), OMPRTL___kmpc_end_single),
                      Args,
                      /*Conditional=*/true);
SingleOpGen.setAction(Action);
emitInlinedDirective(CGF, OMPD_single, SingleOpGen);
if (DidIt.isValid()) {
  // did_it = 1;
  CGF.Builder.CreateStore(CGF.Builder.getInt32(1), DidIt);
}
Action.Done(CGF);
// call __kmpc_copyprivate(ident_t *, gtid, <buf_size>, <copyprivate list>,
// <copy_func>, did_it);
if (DidIt.isValid()) {
  llvm::APInt ArraySize(/*unsigned int numBits=*/32, CopyprivateVars.size());
  QualType CopyprivateArrayTy = C.getConstantArrayType(
      C.VoidPtrTy, ArraySize, nullptr, ArrayType::Normal,
      /*IndexTypeQuals=*/0);
  // Create a list of all private variables for copyprivate.
  Address CopyprivateList =
      CGF.CreateMemTemp(CopyprivateArrayTy, ".omp.copyprivate.cpr_list");
  for (unsigned I = 0, E = CopyprivateVars.size(); I < E; ++I) {
    Address Elem = CGF.Builder.CreateConstArrayGEP(CopyprivateList, I);
    CGF.Builder.CreateStore(
        CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
            CGF.EmitLValue(CopyprivateVars[I]).getPointer(CGF),
            CGF.VoidPtrTy),
        Elem);
  }
  // Build function that copies private values from single region to all other
  // threads in the corresponding parallel region.
  llvm::Value *CpyFn = emitCopyprivateCopyFunction(
      CGM, CGF.ConvertTypeForMem(CopyprivateArrayTy)->getPointerTo(),
      CopyprivateVars, SrcExprs, DstExprs, AssignmentOps, Loc);
  llvm::Value *BufSize = CGF.getTypeSize(CopyprivateArrayTy);
  Address CL =
    CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(CopyprivateList,
                                                    CGF.VoidPtrTy);
  llvm::Value *DidItVal = CGF.Builder.CreateLoad(DidIt);
  llvm::Value *Args[] = {
      emitUpdateLocation(CGF, Loc), // ident_t *<loc>
      getThreadID(CGF, Loc),        // i32 <gtid>
      BufSize,                      // size_t <buf_size>
      CL.getPointer(),              // void *<copyprivate list>
      CpyFn,                        // void (*) (void *, void *) <copy_func>
      DidItVal                      // i32 did_it
  };
  CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                          CGM.getModule(), OMPRTL___kmpc_copyprivate),
                      Args);
}
2510}

2512void CGOpenMPRuntime::emitOrderedRegion(CodeGenFunction &CGF,
                                      const RegionCodeGenTy &OrderedOpGen,
                                      SourceLocation Loc, bool IsThreads) {
if (!CGF.HaveInsertPoint())
  return;
// __kmpc_ordered(ident_t *, gtid);
// OrderedOpGen();
// __kmpc_end_ordered(ident_t *, gtid);
// Prepare arguments and build a call to __kmpc_ordered
if (IsThreads) {
  llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc)};
  CommonActionTy Action(OMPBuilder.getOrCreateRuntimeFunction(
                            CGM.getModule(), OMPRTL___kmpc_ordered),
                        Args,
                        OMPBuilder.getOrCreateRuntimeFunction(
                            CGM.getModule(), OMPRTL___kmpc_end_ordered),
                        Args);
  OrderedOpGen.setAction(Action);
  emitInlinedDirective(CGF, OMPD_ordered, OrderedOpGen);
  return;
}
emitInlinedDirective(CGF, OMPD_ordered, OrderedOpGen);
2534}

2536unsigned CGOpenMPRuntime::getDefaultFlagsForBarriers(OpenMPDirectiveKind Kind) {
unsigned Flags;
if (Kind == OMPD_for)
  Flags = OMP_IDENT_BARRIER_IMPL_FOR;
else if (Kind == OMPD_sections)
  Flags = OMP_IDENT_BARRIER_IMPL_SECTIONS;
else if (Kind == OMPD_single)
  Flags = OMP_IDENT_BARRIER_IMPL_SINGLE;
else if (Kind == OMPD_barrier)
  Flags = OMP_IDENT_BARRIER_EXPL;
else
  Flags = OMP_IDENT_BARRIER_IMPL;
return Flags;
2549}

2551void CGOpenMPRuntime::getDefaultScheduleAndChunk(
  CodeGenFunction &CGF, const OMPLoopDirective &S,
  OpenMPScheduleClauseKind &ScheduleKind, const Expr *&ChunkExpr) const {
// Check if the loop directive is actually a doacross loop directive. In this
// case choose static, 1 schedule.
if (llvm::any_of(
        S.getClausesOfKind<OMPOrderedClause>(),
        [](const OMPOrderedClause *C) { return C->getNumForLoops(); })) {
  ScheduleKind = OMPC_SCHEDULE_static;
  // Chunk size is 1 in this case.
  llvm::APInt ChunkSize(32, 1);
  ChunkExpr = IntegerLiteral::Create(
      CGF.getContext(), ChunkSize,
      CGF.getContext().getIntTypeForBitwidth(32, /*Signed=*/0),
      SourceLocation());
}
2567}

2569void CGOpenMPRuntime::emitBarrierCall(CodeGenFunction &CGF, SourceLocation Loc,
                                    OpenMPDirectiveKind Kind, bool EmitChecks,
                                    bool ForceSimpleCall) {
// Check if we should use the OMPBuilder
auto *OMPRegionInfo =
    dyn_cast_or_null<CGOpenMPRegionInfo>(CGF.CapturedStmtInfo);
if (CGF.CGM.getLangOpts().OpenMPIRBuilder) {
  CGF.Builder.restoreIP(OMPBuilder.createBarrier(
      CGF.Builder, Kind, ForceSimpleCall, EmitChecks));
  return;
}

if (!CGF.HaveInsertPoint())
  return;
// Build call __kmpc_cancel_barrier(loc, thread_id);
// Build call __kmpc_barrier(loc, thread_id);
unsigned Flags = getDefaultFlagsForBarriers(Kind);
// Build call __kmpc_cancel_barrier(loc, thread_id) or __kmpc_barrier(loc,
// thread_id);
llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc, Flags),
                       getThreadID(CGF, Loc)};
if (OMPRegionInfo) {
  if (!ForceSimpleCall && OMPRegionInfo->hasCancel()) {
    llvm::Value *Result = CGF.EmitRuntimeCall(
        OMPBuilder.getOrCreateRuntimeFunction(CGM.getModule(),
                                              OMPRTL___kmpc_cancel_barrier),
        Args);
    if (EmitChecks) {
      // if (__kmpc_cancel_barrier()) {
      //   exit from construct;
      // }
      llvm::BasicBlock *ExitBB = CGF.createBasicBlock(".cancel.exit");
      llvm::BasicBlock *ContBB = CGF.createBasicBlock(".cancel.continue");
      llvm::Value *Cmp = CGF.Builder.CreateIsNotNull(Result);
      CGF.Builder.CreateCondBr(Cmp, ExitBB, ContBB);
      CGF.EmitBlock(ExitBB);
      //   exit from construct;
      CodeGenFunction::JumpDest CancelDestination =
          CGF.getOMPCancelDestination(OMPRegionInfo->getDirectiveKind());
      CGF.EmitBranchThroughCleanup(CancelDestination);
      CGF.EmitBlock(ContBB, /*IsFinished=*/true);
    }
    return;
  }
}
CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                        CGM.getModule(), OMPRTL___kmpc_barrier),
                    Args);
2617}

2619/// Map the OpenMP loop schedule to the runtime enumeration.
2620static OpenMPSchedType getRuntimeSchedule(OpenMPScheduleClauseKind ScheduleKind,
                                        bool Chunked, bool Ordered) {
switch (ScheduleKind) {
case OMPC_SCHEDULE_static:
  return Chunked ? (Ordered ? OMP_ord_static_chunked : OMP_sch_static_chunked)
                 : (Ordered ? OMP_ord_static : OMP_sch_static);
case OMPC_SCHEDULE_dynamic:
  return Ordered ? OMP_ord_dynamic_chunked : OMP_sch_dynamic_chunked;
case OMPC_SCHEDULE_guided:
  return Ordered ? OMP_ord_guided_chunked : OMP_sch_guided_chunked;
case OMPC_SCHEDULE_runtime:
  return Ordered ? OMP_ord_runtime : OMP_sch_runtime;
case OMPC_SCHEDULE_auto:
  return Ordered ? OMP_ord_auto : OMP_sch_auto;
case OMPC_SCHEDULE_unknown:
  assert(!Chunked && "chunk was specified but schedule kind not known")((void)0);
  return Ordered ? OMP_ord_static : OMP_sch_static;
}
llvm_unreachable("Unexpected runtime schedule")__builtin_unreachable();
2639}

2641/// Map the OpenMP distribute schedule to the runtime enumeration.
2642static OpenMPSchedType
2643getRuntimeSchedule(OpenMPDistScheduleClauseKind ScheduleKind, bool Chunked) {
// only static is allowed for dist_schedule
return Chunked ? OMP_dist_sch_static_chunked : OMP_dist_sch_static;
2646}

2648bool CGOpenMPRuntime::isStaticNonchunked(OpenMPScheduleClauseKind ScheduleKind,
                                       bool Chunked) const {
OpenMPSchedType Schedule =
    getRuntimeSchedule(ScheduleKind, Chunked, /*Ordered=*/false);
return Schedule == OMP_sch_static;
2653}

2655bool CGOpenMPRuntime::isStaticNonchunked(
  OpenMPDistScheduleClauseKind ScheduleKind, bool Chunked) const {
OpenMPSchedType Schedule = getRuntimeSchedule(ScheduleKind, Chunked);
return Schedule == OMP_dist_sch_static;
2659}

2661bool CGOpenMPRuntime::isStaticChunked(OpenMPScheduleClauseKind ScheduleKind,
                                    bool Chunked) const {
OpenMPSchedType Schedule =
    getRuntimeSchedule(ScheduleKind, Chunked, /*Ordered=*/false);
return Schedule == OMP_sch_static_chunked;
2666}

2668bool CGOpenMPRuntime::isStaticChunked(
  OpenMPDistScheduleClauseKind ScheduleKind, bool Chunked) const {
OpenMPSchedType Schedule = getRuntimeSchedule(ScheduleKind, Chunked);
return Schedule == OMP_dist_sch_static_chunked;
2672}

2674bool CGOpenMPRuntime::isDynamic(OpenMPScheduleClauseKind ScheduleKind) const {
OpenMPSchedType Schedule =
    getRuntimeSchedule(ScheduleKind, /*Chunked=*/false, /*Ordered=*/false);
assert(Schedule != OMP_sch_static_chunked && "cannot be chunked here")((void)0);
return Schedule != OMP_sch_static;
2679}

2681static int addMonoNonMonoModifier(CodeGenModule &CGM, OpenMPSchedType Schedule,
                                OpenMPScheduleClauseModifier M1,
                                OpenMPScheduleClauseModifier M2) {
int Modifier = 0;
switch (M1) {
case OMPC_SCHEDULE_MODIFIER_monotonic:
  Modifier = OMP_sch_modifier_monotonic;
  break;
case OMPC_SCHEDULE_MODIFIER_nonmonotonic:
  Modifier = OMP_sch_modifier_nonmonotonic;
  break;
case OMPC_SCHEDULE_MODIFIER_simd:
  if (Schedule == OMP_sch_static_chunked)
    Schedule = OMP_sch_static_balanced_chunked;
  break;
case OMPC_SCHEDULE_MODIFIER_last:
case OMPC_SCHEDULE_MODIFIER_unknown:
  break;
}
switch (M2) {
case OMPC_SCHEDULE_MODIFIER_monotonic:
  Modifier = OMP_sch_modifier_monotonic;
  break;
case OMPC_SCHEDULE_MODIFIER_nonmonotonic:
  Modifier = OMP_sch_modifier_nonmonotonic;
  break;
case OMPC_SCHEDULE_MODIFIER_simd:
  if (Schedule == OMP_sch_static_chunked)
    Schedule = OMP_sch_static_balanced_chunked;
  break;
case OMPC_SCHEDULE_MODIFIER_last:
case OMPC_SCHEDULE_MODIFIER_unknown:
  break;
}
// OpenMP 5.0, 2.9.2 Worksharing-Loop Construct, Desription.
// If the static schedule kind is specified or if the ordered clause is
// specified, and if the nonmonotonic modifier is not specified, the effect is
// as if the monotonic modifier is specified. Otherwise, unless the monotonic
// modifier is specified, the effect is as if the nonmonotonic modifier is
// specified.
if (CGM.getLangOpts().OpenMP >= 50 && Modifier == 0) {
  if (!(Schedule == OMP_sch_static_chunked || Schedule == OMP_sch_static ||
        Schedule == OMP_sch_static_balanced_chunked ||
        Schedule == OMP_ord_static_chunked || Schedule == OMP_ord_static ||
        Schedule == OMP_dist_sch_static_chunked ||
        Schedule == OMP_dist_sch_static))
    Modifier = OMP_sch_modifier_nonmonotonic;
}
return Schedule | Modifier;
2730}

2732void CGOpenMPRuntime::emitForDispatchInit(
  CodeGenFunction &CGF, SourceLocation Loc,
  const OpenMPScheduleTy &ScheduleKind, unsigned IVSize, bool IVSigned,
  bool Ordered, const DispatchRTInput &DispatchValues) {
if (!CGF.HaveInsertPoint())
  return;
OpenMPSchedType Schedule = getRuntimeSchedule(
    ScheduleKind.Schedule, DispatchValues.Chunk != nullptr, Ordered);
assert(Ordered ||((void)0)
       (Schedule != OMP_sch_static && Schedule != OMP_sch_static_chunked &&((void)0)
        Schedule != OMP_ord_static && Schedule != OMP_ord_static_chunked &&((void)0)
        Schedule != OMP_sch_static_balanced_chunked))((void)0);
// Call __kmpc_dispatch_init(
//          ident_t *loc, kmp_int32 tid, kmp_int32 schedule,
//          kmp_int[32|64] lower, kmp_int[32|64] upper,
//          kmp_int[32|64] stride, kmp_int[32|64] chunk);

// If the Chunk was not specified in the clause - use default value 1.
llvm::Value *Chunk = DispatchValues.Chunk ? DispatchValues.Chunk
                                          : CGF.Builder.getIntN(IVSize, 1);
llvm::Value *Args[] = {
    emitUpdateLocation(CGF, Loc),
    getThreadID(CGF, Loc),
    CGF.Builder.getInt32(addMonoNonMonoModifier(
        CGM, Schedule, ScheduleKind.M1, ScheduleKind.M2)), // Schedule type
    DispatchValues.LB,                                     // Lower
    DispatchValues.UB,                                     // Upper
    CGF.Builder.getIntN(IVSize, 1),                        // Stride
    Chunk                                                  // Chunk
};
CGF.EmitRuntimeCall(createDispatchInitFunction(IVSize, IVSigned), Args);
2763}

2765static void emitForStaticInitCall(
  CodeGenFunction &CGF, llvm::Value *UpdateLocation, llvm::Value *ThreadId,
  llvm::FunctionCallee ForStaticInitFunction, OpenMPSchedType Schedule,
  OpenMPScheduleClauseModifier M1, OpenMPScheduleClauseModifier M2,
  const CGOpenMPRuntime::StaticRTInput &Values) {
if (!CGF.HaveInsertPoint())
  return;

assert(!Values.Ordered)((void)0);
assert(Schedule == OMP_sch_static || Schedule == OMP_sch_static_chunked ||((void)0)
       Schedule == OMP_sch_static_balanced_chunked ||((void)0)
       Schedule == OMP_ord_static || Schedule == OMP_ord_static_chunked ||((void)0)
       Schedule == OMP_dist_sch_static ||((void)0)
       Schedule == OMP_dist_sch_static_chunked)((void)0);

// Call __kmpc_for_static_init(
//          ident_t *loc, kmp_int32 tid, kmp_int32 schedtype,
//          kmp_int32 *p_lastiter, kmp_int[32|64] *p_lower,
//          kmp_int[32|64] *p_upper, kmp_int[32|64] *p_stride,
//          kmp_int[32|64] incr, kmp_int[32|64] chunk);
llvm::Value *Chunk = Values.Chunk;
if (Chunk == nullptr) {
  assert((Schedule == OMP_sch_static || Schedule == OMP_ord_static ||((void)0)
          Schedule == OMP_dist_sch_static) &&((void)0)
         "expected static non-chunked schedule")((void)0);
  // If the Chunk was not specified in the clause - use default value 1.
  Chunk = CGF.Builder.getIntN(Values.IVSize, 1);
} else {
  assert((Schedule == OMP_sch_static_chunked ||((void)0)
          Schedule == OMP_sch_static_balanced_chunked ||((void)0)
          Schedule == OMP_ord_static_chunked ||((void)0)
          Schedule == OMP_dist_sch_static_chunked) &&((void)0)
         "expected static chunked schedule")((void)0);
}
llvm::Value *Args[] = {
    UpdateLocation,
    ThreadId,
    CGF.Builder.getInt32(addMonoNonMonoModifier(CGF.CGM, Schedule, M1,
                                                M2)), // Schedule type
    Values.IL.getPointer(),                           // &isLastIter
    Values.LB.getPointer(),                           // &LB
    Values.UB.getPointer(),                           // &UB
    Values.ST.getPointer(),                           // &Stride
    CGF.Builder.getIntN(Values.IVSize, 1),            // Incr
    Chunk                                             // Chunk
};
CGF.EmitRuntimeCall(ForStaticInitFunction, Args);
2812}

2814void CGOpenMPRuntime::emitForStaticInit(CodeGenFunction &CGF,
                                      SourceLocation Loc,
                                      OpenMPDirectiveKind DKind,
                                      const OpenMPScheduleTy &ScheduleKind,
                                      const StaticRTInput &Values) {
OpenMPSchedType ScheduleNum = getRuntimeSchedule(
    ScheduleKind.Schedule, Values.Chunk != nullptr, Values.Ordered);
assert(isOpenMPWorksharingDirective(DKind) &&((void)0)
       "Expected loop-based or sections-based directive.")((void)0);
llvm::Value *UpdatedLocation = emitUpdateLocation(CGF, Loc,
                                           isOpenMPLoopDirective(DKind)
                                               ? OMP_IDENT_WORK_LOOP
                                               : OMP_IDENT_WORK_SECTIONS);
llvm::Value *ThreadId = getThreadID(CGF, Loc);
llvm::FunctionCallee StaticInitFunction =
    createForStaticInitFunction(Values.IVSize, Values.IVSigned);
auto DL = ApplyDebugLocation::CreateDefaultArtificial(CGF, Loc);
emitForStaticInitCall(CGF, UpdatedLocation, ThreadId, StaticInitFunction,
                      ScheduleNum, ScheduleKind.M1, ScheduleKind.M2, Values);
2833}

2835void CGOpenMPRuntime::emitDistributeStaticInit(
  CodeGenFunction &CGF, SourceLocation Loc,
  OpenMPDistScheduleClauseKind SchedKind,
  const CGOpenMPRuntime::StaticRTInput &Values) {
OpenMPSchedType ScheduleNum =
    getRuntimeSchedule(SchedKind, Values.Chunk != nullptr);
llvm::Value *UpdatedLocation =
    emitUpdateLocation(CGF, Loc, OMP_IDENT_WORK_DISTRIBUTE);
llvm::Value *ThreadId = getThreadID(CGF, Loc);
llvm::FunctionCallee StaticInitFunction =
    createForStaticInitFunction(Values.IVSize, Values.IVSigned);
emitForStaticInitCall(CGF, UpdatedLocation, ThreadId, StaticInitFunction,
                      ScheduleNum, OMPC_SCHEDULE_MODIFIER_unknown,
                      OMPC_SCHEDULE_MODIFIER_unknown, Values);
2849}

2851void CGOpenMPRuntime::emitForStaticFinish(CodeGenFunction &CGF,
                                        SourceLocation Loc,
                                        OpenMPDirectiveKind DKind) {
if (!CGF.HaveInsertPoint())
  return;
// Call __kmpc_for_static_fini(ident_t *loc, kmp_int32 tid);
llvm::Value *Args[] = {
    emitUpdateLocation(CGF, Loc,
                       isOpenMPDistributeDirective(DKind)
                           ? OMP_IDENT_WORK_DISTRIBUTE
                           : isOpenMPLoopDirective(DKind)
                                 ? OMP_IDENT_WORK_LOOP
                                 : OMP_IDENT_WORK_SECTIONS),
    getThreadID(CGF, Loc)};
auto DL = ApplyDebugLocation::CreateDefaultArtificial(CGF, Loc);
CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                        CGM.getModule(), OMPRTL___kmpc_for_static_fini),
                    Args);
2869}

2871void CGOpenMPRuntime::emitForOrderedIterationEnd(CodeGenFunction &CGF,
                                               SourceLocation Loc,
                                               unsigned IVSize,
                                               bool IVSigned) {
if (!CGF.HaveInsertPoint())
  return;
// Call __kmpc_for_dynamic_fini_(4|8)[u](ident_t *loc, kmp_int32 tid);
llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc)};
CGF.EmitRuntimeCall(createDispatchFiniFunction(IVSize, IVSigned), Args);
2880}

2882llvm::Value *CGOpenMPRuntime::emitForNext(CodeGenFunction &CGF,
                                        SourceLocation Loc, unsigned IVSize,
                                        bool IVSigned, Address IL,
                                        Address LB, Address UB,
                                        Address ST) {
// Call __kmpc_dispatch_next(
//          ident_t *loc, kmp_int32 tid, kmp_int32 *p_lastiter,
//          kmp_int[32|64] *p_lower, kmp_int[32|64] *p_upper,
//          kmp_int[32|64] *p_stride);
llvm::Value *Args[] = {
    emitUpdateLocation(CGF, Loc),
    getThreadID(CGF, Loc),
    IL.getPointer(), // &isLastIter
    LB.getPointer(), // &Lower
    UB.getPointer(), // &Upper
    ST.getPointer()  // &Stride
};
llvm::Value *Call =
    CGF.EmitRuntimeCall(createDispatchNextFunction(IVSize, IVSigned), Args);
return CGF.EmitScalarConversion(
    Call, CGF.getContext().getIntTypeForBitwidth(32, /*Signed=*/1),
    CGF.getContext().BoolTy, Loc);
2904}

2906void CGOpenMPRuntime::emitNumThreadsClause(CodeGenFunction &CGF,
                                         llvm::Value *NumThreads,
                                         SourceLocation Loc) {
if (!CGF.HaveInsertPoint())
  return;
// Build call __kmpc_push_num_threads(&loc, global_tid, num_threads)
llvm::Value *Args[] = {
    emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc),
    CGF.Builder.CreateIntCast(NumThreads, CGF.Int32Ty, /*isSigned*/ true)};
CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                        CGM.getModule(), OMPRTL___kmpc_push_num_threads),
                    Args);
2918}

2920void CGOpenMPRuntime::emitProcBindClause(CodeGenFunction &CGF,
                                       ProcBindKind ProcBind,
                                       SourceLocation Loc) {
if (!CGF.HaveInsertPoint())
  return;
assert(ProcBind != OMP_PROC_BIND_unknown && "Unsupported proc_bind value.")((void)0);
// Build call __kmpc_push_proc_bind(&loc, global_tid, proc_bind)
llvm::Value *Args[] = {
    emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc),
    llvm::ConstantInt::get(CGM.IntTy, unsigned(ProcBind), /*isSigned=*/true)};
CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                        CGM.getModule(), OMPRTL___kmpc_push_proc_bind),
                    Args);
2933}

2935void CGOpenMPRuntime::emitFlush(CodeGenFunction &CGF, ArrayRef<const Expr *>,
                              SourceLocation Loc, llvm::AtomicOrdering AO) {
if (CGF.CGM.getLangOpts().OpenMPIRBuilder) {
  OMPBuilder.createFlush(CGF.Builder);
} else {
  if (!CGF.HaveInsertPoint())
    return;
  // Build call void __kmpc_flush(ident_t *loc)
  CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                          CGM.getModule(), OMPRTL___kmpc_flush),
                      emitUpdateLocation(CGF, Loc));
}
2947}

2949namespace {
2950/// Indexes of fields for type kmp_task_t.
2951enum KmpTaskTFields {
/// List of shared variables.
KmpTaskTShareds,
/// Task routine.
KmpTaskTRoutine,
/// Partition id for the untied tasks.
KmpTaskTPartId,
/// Function with call of destructors for private variables.
Data1,
/// Task priority.
Data2,
/// (Taskloops only) Lower bound.
KmpTaskTLowerBound,
/// (Taskloops only) Upper bound.
KmpTaskTUpperBound,
/// (Taskloops only) Stride.
KmpTaskTStride,
/// (Taskloops only) Is last iteration flag.
KmpTaskTLastIter,
/// (Taskloops only) Reduction data.
KmpTaskTReductions,
2972};
2973} // anonymous namespace

2975bool CGOpenMPRuntime::OffloadEntriesInfoManagerTy::empty() const {
return OffloadEntriesTargetRegion.empty() &&
       OffloadEntriesDeviceGlobalVar.empty();
2978}

2980/// Initialize target region entry.
2981void CGOpenMPRuntime::OffloadEntriesInfoManagerTy::
  initializeTargetRegionEntryInfo(unsigned DeviceID, unsigned FileID,
                                  StringRef ParentName, unsigned LineNum,
                                  unsigned Order) {
assert(CGM.getLangOpts().OpenMPIsDevice && "Initialization of entries is "((void)0)
                                           "only required for the device "((void)0)
                                           "code generation.")((void)0);
OffloadEntriesTargetRegion[DeviceID][FileID][ParentName][LineNum] =
    OffloadEntryInfoTargetRegion(Order, /*Addr=*/nullptr, /*ID=*/nullptr,
                                 OMPTargetRegionEntryTargetRegion);
++OffloadingEntriesNum;
2992}

2994void CGOpenMPRuntime::OffloadEntriesInfoManagerTy::
  registerTargetRegionEntryInfo(unsigned DeviceID, unsigned FileID,
                                StringRef ParentName, unsigned LineNum,
                                llvm::Constant *Addr, llvm::Constant *ID,
                                OMPTargetRegionEntryKind Flags) {
// If we are emitting code for a target, the entry is already initialized,
// only has to be registered.
if (CGM.getLangOpts().OpenMPIsDevice) {
  // This could happen if the device compilation is invoked standalone.
  if (!hasTargetRegionEntryInfo(DeviceID, FileID, ParentName, LineNum))
    return;
  auto &Entry =
      OffloadEntriesTargetRegion[DeviceID][FileID][ParentName][LineNum];
  Entry.setAddress(Addr);
  Entry.setID(ID);
  Entry.setFlags(Flags);
} else {
  if (Flags ==
          OffloadEntriesInfoManagerTy::OMPTargetRegionEntryTargetRegion &&
      hasTargetRegionEntryInfo(DeviceID, FileID, ParentName, LineNum,
                               /*IgnoreAddressId*/ true))
    return;
  assert(!hasTargetRegionEntryInfo(DeviceID, FileID, ParentName, LineNum) &&((void)0)
         "Target region entry already registered!")((void)0);
  OffloadEntryInfoTargetRegion Entry(OffloadingEntriesNum, Addr, ID, Flags);
  OffloadEntriesTargetRegion[DeviceID][FileID][ParentName][LineNum] = Entry;
  ++OffloadingEntriesNum;
}
3022}

3024bool CGOpenMPRuntime::OffloadEntriesInfoManagerTy::hasTargetRegionEntryInfo(
  unsigned DeviceID, unsigned FileID, StringRef ParentName, unsigned LineNum,
  bool IgnoreAddressId) const {
auto PerDevice = OffloadEntriesTargetRegion.find(DeviceID);
if (PerDevice == OffloadEntriesTargetRegion.end())
  return false;
auto PerFile = PerDevice->second.find(FileID);
if (PerFile == PerDevice->second.end())
  return false;
auto PerParentName = PerFile->second.find(ParentName);
if (PerParentName == PerFile->second.end())
  return false;
auto PerLine = PerParentName->second.find(LineNum);
if (PerLine == PerParentName->second.end())
  return false;
// Fail if this entry is already registered.
if (!IgnoreAddressId &&
    (PerLine->second.getAddress() || PerLine->second.getID()))
  return false;
return true;
3044}

3046void CGOpenMPRuntime::OffloadEntriesInfoManagerTy::actOnTargetRegionEntriesInfo(
  const OffloadTargetRegionEntryInfoActTy &Action) {
// Scan all target region entries and perform the provided action.
for (const auto &D : OffloadEntriesTargetRegion)
  for (const auto &F : D.second)
    for (const auto &P : F.second)
      for (const auto &L : P.second)
        Action(D.first, F.first, P.first(), L.first, L.second);
3054}

3056void CGOpenMPRuntime::OffloadEntriesInfoManagerTy::
  initializeDeviceGlobalVarEntryInfo(StringRef Name,
                                     OMPTargetGlobalVarEntryKind Flags,
                                     unsigned Order) {
assert(CGM.getLangOpts().OpenMPIsDevice && "Initialization of entries is "((void)0)
                                           "only required for the device "((void)0)
                                           "code generation.")((void)0);
OffloadEntriesDeviceGlobalVar.try_emplace(Name, Order, Flags);
++OffloadingEntriesNum;
3065}

3067void CGOpenMPRuntime::OffloadEntriesInfoManagerTy::
  registerDeviceGlobalVarEntryInfo(StringRef VarName, llvm::Constant *Addr,
                                   CharUnits VarSize,
                                   OMPTargetGlobalVarEntryKind Flags,
                                   llvm::GlobalValue::LinkageTypes Linkage) {
if (CGM.getLangOpts().OpenMPIsDevice) {
  // This could happen if the device compilation is invoked standalone.
  if (!hasDeviceGlobalVarEntryInfo(VarName))
    return;
  auto &Entry = OffloadEntriesDeviceGlobalVar[VarName];
  if (Entry.getAddress() && hasDeviceGlobalVarEntryInfo(VarName)) {
    if (Entry.getVarSize().isZero()) {
      Entry.setVarSize(VarSize);
      Entry.setLinkage(Linkage);
    }
    return;
  }
  Entry.setVarSize(VarSize);
  Entry.setLinkage(Linkage);
  Entry.setAddress(Addr);
} else {
  if (hasDeviceGlobalVarEntryInfo(VarName)) {
    auto &Entry = OffloadEntriesDeviceGlobalVar[VarName];
    assert(Entry.isValid() && Entry.getFlags() == Flags &&((void)0)
           "Entry not initialized!")((void)0);
    if (Entry.getVarSize().isZero()) {
      Entry.setVarSize(VarSize);
      Entry.setLinkage(Linkage);
    }
    return;
  }
  OffloadEntriesDeviceGlobalVar.try_emplace(
      VarName, OffloadingEntriesNum, Addr, VarSize, Flags, Linkage);
  ++OffloadingEntriesNum;
}
3102}

3104void CGOpenMPRuntime::OffloadEntriesInfoManagerTy::
  actOnDeviceGlobalVarEntriesInfo(
      const OffloadDeviceGlobalVarEntryInfoActTy &Action) {
// Scan all target region entries and perform the provided action.
for (const auto &E : OffloadEntriesDeviceGlobalVar)
  Action(E.getKey(), E.getValue());
3110}

3112void CGOpenMPRuntime::createOffloadEntry(
  llvm::Constant *ID, llvm::Constant *Addr, uint64_t Size, int32_t Flags,
  llvm::GlobalValue::LinkageTypes Linkage) {
StringRef Name = Addr->getName();
llvm::Module &M = CGM.getModule();
llvm::LLVMContext &C = M.getContext();

// Create constant string with the name.
llvm::Constant *StrPtrInit = llvm::ConstantDataArray::getString(C, Name);

std::string StringName = getName({"omp_offloading", "entry_name"});
auto *Str = new llvm::GlobalVariable(
    M, StrPtrInit->getType(), /*isConstant=*/true,
    llvm::GlobalValue::InternalLinkage, StrPtrInit, StringName);
Str->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);

llvm::Constant *Data[] = {
    llvm::ConstantExpr::getPointerBitCastOrAddrSpaceCast(ID, CGM.VoidPtrTy),
    llvm::ConstantExpr::getPointerBitCastOrAddrSpaceCast(Str, CGM.Int8PtrTy),
    llvm::ConstantInt::get(CGM.SizeTy, Size),
    llvm::ConstantInt::get(CGM.Int32Ty, Flags),
    llvm::ConstantInt::get(CGM.Int32Ty, 0)};
std::string EntryName = getName({"omp_offloading", "entry", ""});
llvm::GlobalVariable *Entry = createGlobalStruct(
    CGM, getTgtOffloadEntryQTy(), /*IsConstant=*/true, Data,
    Twine(EntryName).concat(Name), llvm::GlobalValue::WeakAnyLinkage);

// The entry has to be created in the section the linker expects it to be.
Entry->setSection("omp_offloading_entries");
3141}

3143void CGOpenMPRuntime::createOffloadEntriesAndInfoMetadata() {
// Emit the offloading entries and metadata so that the device codegen side
// can easily figure out what to emit. The produced metadata looks like
// this:
//
// !omp_offload.info = !{!1, ...}
//
// Right now we only generate metadata for function that contain target
// regions.

// If we are in simd mode or there are no entries, we don't need to do
// anything.
if (CGM.getLangOpts().OpenMPSimd || OffloadEntriesInfoManager.empty())
  return;

llvm::Module &M = CGM.getModule();
llvm::LLVMContext &C = M.getContext();
SmallVector<std::tuple<const OffloadEntriesInfoManagerTy::OffloadEntryInfo *,
                       SourceLocation, StringRef>,
            16>
    OrderedEntries(OffloadEntriesInfoManager.size());
llvm::SmallVector<StringRef, 16> ParentFunctions(
    OffloadEntriesInfoManager.size());

// Auxiliary methods to create metadata values and strings.
auto &&GetMDInt = [this](unsigned V) {
  return llvm::ConstantAsMetadata::get(
      llvm::ConstantInt::get(CGM.Int32Ty, V));
};

auto &&GetMDString = [&C](StringRef V) { return llvm::MDString::get(C, V); };

// Create the offloading info metadata node.
llvm::NamedMDNode *MD = M.getOrInsertNamedMetadata("omp_offload.info");

// Create function that emits metadata for each target region entry;
auto &&TargetRegionMetadataEmitter =
    [this, &C, MD, &OrderedEntries, &ParentFunctions, &GetMDInt,
     &GetMDString](
        unsigned DeviceID, unsigned FileID, StringRef ParentName,
        unsigned Line,
        const OffloadEntriesInfoManagerTy::OffloadEntryInfoTargetRegion &E) {
      // Generate metadata for target regions. Each entry of this metadata
      // contains:
      // - Entry 0 -> Kind of this type of metadata (0).
      // - Entry 1 -> Device ID of the file where the entry was identified.
      // - Entry 2 -> File ID of the file where the entry was identified.
      // - Entry 3 -> Mangled name of the function where the entry was
      // identified.
      // - Entry 4 -> Line in the file where the entry was identified.
      // - Entry 5 -> Order the entry was created.
      // The first element of the metadata node is the kind.
      llvm::Metadata *Ops[] = {GetMDInt(E.getKind()), GetMDInt(DeviceID),
                               GetMDInt(FileID),      GetMDString(ParentName),
                               GetMDInt(Line),        GetMDInt(E.getOrder())};

      SourceLocation Loc;
      for (auto I = CGM.getContext().getSourceManager().fileinfo_begin(),
                E = CGM.getContext().getSourceManager().fileinfo_end();
           I != E; ++I) {
        if (I->getFirst()->getUniqueID().getDevice() == DeviceID &&
            I->getFirst()->getUniqueID().getFile() == FileID) {
          Loc = CGM.getContext().getSourceManager().translateFileLineCol(
              I->getFirst(), Line, 1);
          break;
        }
      }
      // Save this entry in the right position of the ordered entries array.
      OrderedEntries[E.getOrder()] = std::make_tuple(&E, Loc, ParentName);
      ParentFunctions[E.getOrder()] = ParentName;

      // Add metadata to the named metadata node.
      MD->addOperand(llvm::MDNode::get(C, Ops));
    };

OffloadEntriesInfoManager.actOnTargetRegionEntriesInfo(
    TargetRegionMetadataEmitter);

// Create function that emits metadata for each device global variable entry;
auto &&DeviceGlobalVarMetadataEmitter =
    [&C, &OrderedEntries, &GetMDInt, &GetMDString,
     MD](StringRef MangledName,
         const OffloadEntriesInfoManagerTy::OffloadEntryInfoDeviceGlobalVar
             &E) {
      // Generate metadata for global variables. Each entry of this metadata
      // contains:
      // - Entry 0 -> Kind of this type of metadata (1).
      // - Entry 1 -> Mangled name of the variable.
      // - Entry 2 -> Declare target kind.
      // - Entry 3 -> Order the entry was created.
      // The first element of the metadata node is the kind.
      llvm::Metadata *Ops[] = {
          GetMDInt(E.getKind()), GetMDString(MangledName),
          GetMDInt(E.getFlags()), GetMDInt(E.getOrder())};

      // Save this entry in the right position of the ordered entries array.
      OrderedEntries[E.getOrder()] =
          std::make_tuple(&E, SourceLocation(), MangledName);

      // Add metadata to the named metadata node.
      MD->addOperand(llvm::MDNode::get(C, Ops));
    };

OffloadEntriesInfoManager.actOnDeviceGlobalVarEntriesInfo(
    DeviceGlobalVarMetadataEmitter);

for (const auto &E : OrderedEntries) {
  assert(std::get<0>(E) && "All ordered entries must exist!")((void)0);
  if (const auto *CE =
          dyn_cast<OffloadEntriesInfoManagerTy::OffloadEntryInfoTargetRegion>(
              std::get<0>(E))) {
    if (!CE->getID() || !CE->getAddress()) {
      // Do not blame the entry if the parent funtion is not emitted.
      StringRef FnName = ParentFunctions[CE->getOrder()];
      if (!CGM.GetGlobalValue(FnName))
        continue;
      unsigned DiagID = CGM.getDiags().getCustomDiagID(
          DiagnosticsEngine::Error,
          "Offloading entry for target region in %0 is incorrect: either the "
          "address or the ID is invalid.");
      CGM.getDiags().Report(std::get<1>(E), DiagID) << FnName;
      continue;
    }
    createOffloadEntry(CE->getID(), CE->getAddress(), /*Size=*/0,
                       CE->getFlags(), llvm::GlobalValue::WeakAnyLinkage);
  } else if (const auto *CE = dyn_cast<OffloadEntriesInfoManagerTy::
                                           OffloadEntryInfoDeviceGlobalVar>(
                 std::get<0>(E))) {
    OffloadEntriesInfoManagerTy::OMPTargetGlobalVarEntryKind Flags =
        static_cast<OffloadEntriesInfoManagerTy::OMPTargetGlobalVarEntryKind>(
            CE->getFlags());
    switch (Flags) {
    case OffloadEntriesInfoManagerTy::OMPTargetGlobalVarEntryTo: {
      if (CGM.getLangOpts().OpenMPIsDevice &&
          CGM.getOpenMPRuntime().hasRequiresUnifiedSharedMemory())
        continue;
      if (!CE->getAddress()) {
        unsigned DiagID = CGM.getDiags().getCustomDiagID(
            DiagnosticsEngine::Error, "Offloading entry for declare target "
                                      "variable %0 is incorrect: the "
                                      "address is invalid.");
        CGM.getDiags().Report(std::get<1>(E), DiagID) << std::get<2>(E);
        continue;
      }
      // The vaiable has no definition - no need to add the entry.
      if (CE->getVarSize().isZero())
        continue;
      break;
    }
    case OffloadEntriesInfoManagerTy::OMPTargetGlobalVarEntryLink:
      assert(((CGM.getLangOpts().OpenMPIsDevice && !CE->getAddress()) ||((void)0)
              (!CGM.getLangOpts().OpenMPIsDevice && CE->getAddress())) &&((void)0)
             "Declaret target link address is set.")((void)0);
      if (CGM.getLangOpts().OpenMPIsDevice)
        continue;
      if (!CE->getAddress()) {
        unsigned DiagID = CGM.getDiags().getCustomDiagID(
            DiagnosticsEngine::Error,
            "Offloading entry for declare target variable is incorrect: the "
            "address is invalid.");
        CGM.getDiags().Report(DiagID);
        continue;
      }
      break;
    }
    createOffloadEntry(CE->getAddress(), CE->getAddress(),
                       CE->getVarSize().getQuantity(), Flags,
                       CE->getLinkage());
  } else {
    llvm_unreachable("Unsupported entry kind.")__builtin_unreachable();
  }
}
3315}

3317/// Loads all the offload entries information from the host IR
3318/// metadata.
3319void CGOpenMPRuntime::loadOffloadInfoMetadata() {
// If we are in target mode, load the metadata from the host IR. This code has
// to match the metadaata creation in createOffloadEntriesAndInfoMetadata().

if (!CGM.getLangOpts().OpenMPIsDevice)
  return;

if (CGM.getLangOpts().OMPHostIRFile.empty())
  return;

auto Buf = llvm::MemoryBuffer::getFile(CGM.getLangOpts().OMPHostIRFile);
if (auto EC = Buf.getError()) {
  CGM.getDiags().Report(diag::err_cannot_open_file)
      << CGM.getLangOpts().OMPHostIRFile << EC.message();
  return;
}

llvm::LLVMContext C;
auto ME = expectedToErrorOrAndEmitErrors(
    C, llvm::parseBitcodeFile(Buf.get()->getMemBufferRef(), C));

if (auto EC = ME.getError()) {
  unsigned DiagID = CGM.getDiags().getCustomDiagID(
      DiagnosticsEngine::Error, "Unable to parse host IR file '%0':'%1'");
  CGM.getDiags().Report(DiagID)
      << CGM.getLangOpts().OMPHostIRFile << EC.message();
  return;
}

llvm::NamedMDNode *MD = ME.get()->getNamedMetadata("omp_offload.info");
if (!MD)
  return;

for (llvm::MDNode *MN : MD->operands()) {
  auto &&GetMDInt = [MN](unsigned Idx) {
    auto *V = cast<llvm::ConstantAsMetadata>(MN->getOperand(Idx));
    return cast<llvm::ConstantInt>(V->getValue())->getZExtValue();
  };

  auto &&GetMDString = [MN](unsigned Idx) {
    auto *V = cast<llvm::MDString>(MN->getOperand(Idx));
    return V->getString();
  };

  switch (GetMDInt(0)) {
  default:
    llvm_unreachable("Unexpected metadata!")__builtin_unreachable();
    break;
  case OffloadEntriesInfoManagerTy::OffloadEntryInfo::
      OffloadingEntryInfoTargetRegion:
    OffloadEntriesInfoManager.initializeTargetRegionEntryInfo(
        /*DeviceID=*/GetMDInt(1), /*FileID=*/GetMDInt(2),
        /*ParentName=*/GetMDString(3), /*Line=*/GetMDInt(4),
        /*Order=*/GetMDInt(5));
    break;
  case OffloadEntriesInfoManagerTy::OffloadEntryInfo::
      OffloadingEntryInfoDeviceGlobalVar:
    OffloadEntriesInfoManager.initializeDeviceGlobalVarEntryInfo(
        /*MangledName=*/GetMDString(1),
        static_cast<OffloadEntriesInfoManagerTy::OMPTargetGlobalVarEntryKind>(
            /*Flags=*/GetMDInt(2)),
        /*Order=*/GetMDInt(3));
    break;
  }
}
3384}

3386void CGOpenMPRuntime::emitKmpRoutineEntryT(QualType KmpInt32Ty) {
if (!KmpRoutineEntryPtrTy) {
  // Build typedef kmp_int32 (* kmp_routine_entry_t)(kmp_int32, void *); type.
  ASTContext &C = CGM.getContext();
  QualType KmpRoutineEntryTyArgs[] = {KmpInt32Ty, C.VoidPtrTy};
  FunctionProtoType::ExtProtoInfo EPI;
  KmpRoutineEntryPtrQTy = C.getPointerType(
      C.getFunctionType(KmpInt32Ty, KmpRoutineEntryTyArgs, EPI));
  KmpRoutineEntryPtrTy = CGM.getTypes().ConvertType(KmpRoutineEntryPtrQTy);
}
3396}

3398QualType CGOpenMPRuntime::getTgtOffloadEntryQTy() {
// Make sure the type of the entry is already created. This is the type we
// have to create:
// struct __tgt_offload_entry{
//   void      *addr;       // Pointer to the offload entry info.
//                          // (function or global)
//   char      *name;       // Name of the function or global.
//   size_t     size;       // Size of the entry info (0 if it a function).
//   int32_t    flags;      // Flags associated with the entry, e.g. 'link'.
//   int32_t    reserved;   // Reserved, to use by the runtime library.
// };
if (TgtOffloadEntryQTy.isNull()) {
  ASTContext &C = CGM.getContext();
  RecordDecl *RD = C.buildImplicitRecord("__tgt_offload_entry");
  RD->startDefinition();
  addFieldToRecordDecl(C, RD, C.VoidPtrTy);
  addFieldToRecordDecl(C, RD, C.getPointerType(C.CharTy));
  addFieldToRecordDecl(C, RD, C.getSizeType());
  addFieldToRecordDecl(
      C, RD, C.getIntTypeForBitwidth(/*DestWidth=*/32, /*Signed=*/true));
  addFieldToRecordDecl(
      C, RD, C.getIntTypeForBitwidth(/*DestWidth=*/32, /*Signed=*/true));
  RD->completeDefinition();
  RD->addAttr(PackedAttr::CreateImplicit(C));
  TgtOffloadEntryQTy = C.getRecordType(RD);
}
return TgtOffloadEntryQTy;
3425}

3427namespace {
3428struct PrivateHelpersTy {
PrivateHelpersTy(const Expr *OriginalRef, const VarDecl *Original,
                 const VarDecl *PrivateCopy, const VarDecl *PrivateElemInit)
    : OriginalRef(OriginalRef), Original(Original), PrivateCopy(PrivateCopy),
      PrivateElemInit(PrivateElemInit) {}
PrivateHelpersTy(const VarDecl *Original) : Original(Original) {}
const Expr *OriginalRef = nullptr;
const VarDecl *Original = nullptr;
const VarDecl *PrivateCopy = nullptr;
const VarDecl *PrivateElemInit = nullptr;
bool isLocalPrivate() const {
  return !OriginalRef && !PrivateCopy && !PrivateElemInit;
}
3441};
3442typedef std::pair<CharUnits /*Align*/, PrivateHelpersTy> PrivateDataTy;
3443} // anonymous namespace

3445static bool isAllocatableDecl(const VarDecl *VD) {
const VarDecl *CVD = VD->getCanonicalDecl();
if (!CVD->hasAttr<OMPAllocateDeclAttr>())
  return false;
const auto *AA = CVD->getAttr<OMPAllocateDeclAttr>();
// Use the default allocation.
return !((AA->getAllocatorType() == OMPAllocateDeclAttr::OMPDefaultMemAlloc ||
          AA->getAllocatorType() == OMPAllocateDeclAttr::OMPNullMemAlloc) &&
         !AA->getAllocator());
3454}

3456static RecordDecl *
3457createPrivatesRecordDecl(CodeGenModule &CGM, ArrayRef<PrivateDataTy> Privates) {
if (!Privates.empty()) {
  ASTContext &C = CGM.getContext();
  // Build struct .kmp_privates_t. {
  //         /*  private vars  */
  //       };
  RecordDecl *RD = C.buildImplicitRecord(".kmp_privates.t");
  RD->startDefinition();
  for (const auto &Pair : Privates) {
    const VarDecl *VD = Pair.second.Original;
    QualType Type = VD->getType().getNonReferenceType();
    // If the private variable is a local variable with lvalue ref type,
    // allocate the pointer instead of the pointee type.
    if (Pair.second.isLocalPrivate()) {
      if (VD->getType()->isLValueReferenceType())
        Type = C.getPointerType(Type);
      if (isAllocatableDecl(VD))
        Type = C.getPointerType(Type);
    }
    FieldDecl *FD = addFieldToRecordDecl(C, RD, Type);
    if (VD->hasAttrs()) {
      for (specific_attr_iterator<AlignedAttr> I(VD->getAttrs().begin()),
           E(VD->getAttrs().end());
           I != E; ++I)
        FD->addAttr(*I);
    }
  }
  RD->completeDefinition();
  return RD;
}
return nullptr;
3488}

3490static RecordDecl *
3491createKmpTaskTRecordDecl(CodeGenModule &CGM, OpenMPDirectiveKind Kind,
                       QualType KmpInt32Ty,
                       QualType KmpRoutineEntryPointerQTy) {
ASTContext &C = CGM.getContext();
// Build struct kmp_task_t {
//         void *              shareds;
//         kmp_routine_entry_t routine;
//         kmp_int32           part_id;
//         kmp_cmplrdata_t data1;
//         kmp_cmplrdata_t data2;
// For taskloops additional fields:
//         kmp_uint64          lb;
//         kmp_uint64          ub;
//         kmp_int64           st;
//         kmp_int32           liter;
//         void *              reductions;
//       };
RecordDecl *UD = C.buildImplicitRecord("kmp_cmplrdata_t", TTK_Union);
UD->startDefinition();
addFieldToRecordDecl(C, UD, KmpInt32Ty);
addFieldToRecordDecl(C, UD, KmpRoutineEntryPointerQTy);
UD->completeDefinition();
QualType KmpCmplrdataTy = C.getRecordType(UD);
RecordDecl *RD = C.buildImplicitRecord("kmp_task_t");
RD->startDefinition();
addFieldToRecordDecl(C, RD, C.VoidPtrTy);
addFieldToRecordDecl(C, RD, KmpRoutineEntryPointerQTy);
addFieldToRecordDecl(C, RD, KmpInt32Ty);
addFieldToRecordDecl(C, RD, KmpCmplrdataTy);
addFieldToRecordDecl(C, RD, KmpCmplrdataTy);
if (isOpenMPTaskLoopDirective(Kind)) {
  QualType KmpUInt64Ty =
      CGM.getContext().getIntTypeForBitwidth(/*DestWidth=*/64, /*Signed=*/0);
  QualType KmpInt64Ty =
      CGM.getContext().getIntTypeForBitwidth(/*DestWidth=*/64, /*Signed=*/1);
  addFieldToRecordDecl(C, RD, KmpUInt64Ty);
  addFieldToRecordDecl(C, RD, KmpUInt64Ty);
  addFieldToRecordDecl(C, RD, KmpInt64Ty);
  addFieldToRecordDecl(C, RD, KmpInt32Ty);
  addFieldToRecordDecl(C, RD, C.VoidPtrTy);
}
RD->completeDefinition();
return RD;
3534}

3536static RecordDecl *
3537createKmpTaskTWithPrivatesRecordDecl(CodeGenModule &CGM, QualType KmpTaskTQTy,
                                   ArrayRef<PrivateDataTy> Privates) {
ASTContext &C = CGM.getContext();
// Build struct kmp_task_t_with_privates {
//         kmp_task_t task_data;
//         .kmp_privates_t. privates;
//       };
RecordDecl *RD = C.buildImplicitRecord("kmp_task_t_with_privates");
RD->startDefinition();
addFieldToRecordDecl(C, RD, KmpTaskTQTy);
if (const RecordDecl *PrivateRD = createPrivatesRecordDecl(CGM, Privates))
  addFieldToRecordDecl(C, RD, C.getRecordType(PrivateRD));
RD->completeDefinition();
return RD;
3551}

3553/// Emit a proxy function which accepts kmp_task_t as the second
3554/// argument.
3555/// \code
3556/// kmp_int32 .omp_task_entry.(kmp_int32 gtid, kmp_task_t *tt) {
3557///   TaskFunction(gtid, tt->part_id, &tt->privates, task_privates_map, tt,
3558///   For taskloops:
3559///   tt->task_data.lb, tt->task_data.ub, tt->task_data.st, tt->task_data.liter,
3560///   tt->reductions, tt->shareds);
3561///   return 0;
3562/// }
3563/// \endcode
3564static llvm::Function *
3565emitProxyTaskFunction(CodeGenModule &CGM, SourceLocation Loc,
                    OpenMPDirectiveKind Kind, QualType KmpInt32Ty,
                    QualType KmpTaskTWithPrivatesPtrQTy,
                    QualType KmpTaskTWithPrivatesQTy, QualType KmpTaskTQTy,
                    QualType SharedsPtrTy, llvm::Function *TaskFunction,
                    llvm::Value *TaskPrivatesMap) {
ASTContext &C = CGM.getContext();
FunctionArgList Args;
ImplicitParamDecl GtidArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, KmpInt32Ty,
                          ImplicitParamDecl::Other);
ImplicitParamDecl TaskTypeArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr,
                              KmpTaskTWithPrivatesPtrQTy.withRestrict(),
                              ImplicitParamDecl::Other);
Args.push_back(&GtidArg);
Args.push_back(&TaskTypeArg);
const auto &TaskEntryFnInfo =
    CGM.getTypes().arrangeBuiltinFunctionDeclaration(KmpInt32Ty, Args);
llvm::FunctionType *TaskEntryTy =
    CGM.getTypes().GetFunctionType(TaskEntryFnInfo);
std::string Name = CGM.getOpenMPRuntime().getName({"omp_task_entry", ""});
auto *TaskEntry = llvm::Function::Create(
    TaskEntryTy, llvm::GlobalValue::InternalLinkage, Name, &CGM.getModule());
CGM.SetInternalFunctionAttributes(GlobalDecl(), TaskEntry, TaskEntryFnInfo);
TaskEntry->setDoesNotRecurse();
CodeGenFunction CGF(CGM);
CGF.StartFunction(GlobalDecl(), KmpInt32Ty, TaskEntry, TaskEntryFnInfo, Args,
                  Loc, Loc);

// TaskFunction(gtid, tt->task_data.part_id, &tt->privates, task_privates_map,
// tt,
// For taskloops:
// tt->task_data.lb, tt->task_data.ub, tt->task_data.st, tt->task_data.liter,
// tt->task_data.shareds);
llvm::Value *GtidParam = CGF.EmitLoadOfScalar(
    CGF.GetAddrOfLocalVar(&GtidArg), /*Volatile=*/false, KmpInt32Ty, Loc);
LValue TDBase = CGF.EmitLoadOfPointerLValue(
    CGF.GetAddrOfLocalVar(&TaskTypeArg),
    KmpTaskTWithPrivatesPtrQTy->castAs<PointerType>());
const auto *KmpTaskTWithPrivatesQTyRD =
    cast<RecordDecl>(KmpTaskTWithPrivatesQTy->getAsTagDecl());
LValue Base =
    CGF.EmitLValueForField(TDBase, *KmpTaskTWithPrivatesQTyRD->field_begin());
const auto *KmpTaskTQTyRD = cast<RecordDecl>(KmpTaskTQTy->getAsTagDecl());
auto PartIdFI = std::next(KmpTaskTQTyRD->field_begin(), KmpTaskTPartId);
LValue PartIdLVal = CGF.EmitLValueForField(Base, *PartIdFI);
llvm::Value *PartidParam = PartIdLVal.getPointer(CGF);

auto SharedsFI = std::next(KmpTaskTQTyRD->field_begin(), KmpTaskTShareds);
LValue SharedsLVal = CGF.EmitLValueForField(Base, *SharedsFI);
llvm::Value *SharedsParam = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
    CGF.EmitLoadOfScalar(SharedsLVal, Loc),
    CGF.ConvertTypeForMem(SharedsPtrTy));

auto PrivatesFI = std::next(KmpTaskTWithPrivatesQTyRD->field_begin(), 1);
llvm::Value *PrivatesParam;
if (PrivatesFI != KmpTaskTWithPrivatesQTyRD->field_end()) {
  LValue PrivatesLVal = CGF.EmitLValueForField(TDBase, *PrivatesFI);
  PrivatesParam = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
      PrivatesLVal.getPointer(CGF), CGF.VoidPtrTy);
} else {
  PrivatesParam = llvm::ConstantPointerNull::get(CGF.VoidPtrTy);
}

llvm::Value *CommonArgs[] = {GtidParam, PartidParam, PrivatesParam,
                             TaskPrivatesMap,
                             CGF.Builder
                                 .CreatePointerBitCastOrAddrSpaceCast(
                                     TDBase.getAddress(CGF), CGF.VoidPtrTy)
                                 .getPointer()};
SmallVector<llvm::Value *, 16> CallArgs(std::begin(CommonArgs),
                                        std::end(CommonArgs));
if (isOpenMPTaskLoopDirective(Kind)) {
  auto LBFI = std::next(KmpTaskTQTyRD->field_begin(), KmpTaskTLowerBound);
  LValue LBLVal = CGF.EmitLValueForField(Base, *LBFI);
  llvm::Value *LBParam = CGF.EmitLoadOfScalar(LBLVal, Loc);
  auto UBFI = std::next(KmpTaskTQTyRD->field_begin(), KmpTaskTUpperBound);
  LValue UBLVal = CGF.EmitLValueForField(Base, *UBFI);
  llvm::Value *UBParam = CGF.EmitLoadOfScalar(UBLVal, Loc);
  auto StFI = std::next(KmpTaskTQTyRD->field_begin(), KmpTaskTStride);
  LValue StLVal = CGF.EmitLValueForField(Base, *StFI);
  llvm::Value *StParam = CGF.EmitLoadOfScalar(StLVal, Loc);
  auto LIFI = std::next(KmpTaskTQTyRD->field_begin(), KmpTaskTLastIter);
  LValue LILVal = CGF.EmitLValueForField(Base, *LIFI);
  llvm::Value *LIParam = CGF.EmitLoadOfScalar(LILVal, Loc);
  auto RFI = std::next(KmpTaskTQTyRD->field_begin(), KmpTaskTReductions);
  LValue RLVal = CGF.EmitLValueForField(Base, *RFI);
  llvm::Value *RParam = CGF.EmitLoadOfScalar(RLVal, Loc);
  CallArgs.push_back(LBParam);
  CallArgs.push_back(UBParam);
  CallArgs.push_back(StParam);
  CallArgs.push_back(LIParam);
  CallArgs.push_back(RParam);
}
CallArgs.push_back(SharedsParam);

CGM.getOpenMPRuntime().emitOutlinedFunctionCall(CGF, Loc, TaskFunction,
                                                CallArgs);
CGF.EmitStoreThroughLValue(RValue::get(CGF.Builder.getInt32(/*C=*/0)),
                           CGF.MakeAddrLValue(CGF.ReturnValue, KmpInt32Ty));
CGF.FinishFunction();
return TaskEntry;
3666}

3668static llvm::Value *emitDestructorsFunction(CodeGenModule &CGM,
                                          SourceLocation Loc,
                                          QualType KmpInt32Ty,
                                          QualType KmpTaskTWithPrivatesPtrQTy,
                                          QualType KmpTaskTWithPrivatesQTy) {
ASTContext &C = CGM.getContext();
FunctionArgList Args;
ImplicitParamDecl GtidArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, KmpInt32Ty,
                          ImplicitParamDecl::Other);
ImplicitParamDecl TaskTypeArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr,
                              KmpTaskTWithPrivatesPtrQTy.withRestrict(),
                              ImplicitParamDecl::Other);
Args.push_back(&GtidArg);
Args.push_back(&TaskTypeArg);
const auto &DestructorFnInfo =
    CGM.getTypes().arrangeBuiltinFunctionDeclaration(KmpInt32Ty, Args);
llvm::FunctionType *DestructorFnTy =
    CGM.getTypes().GetFunctionType(DestructorFnInfo);
std::string Name =
    CGM.getOpenMPRuntime().getName({"omp_task_destructor", ""});
auto *DestructorFn =
    llvm::Function::Create(DestructorFnTy, llvm::GlobalValue::InternalLinkage,
                           Name, &CGM.getModule());
CGM.SetInternalFunctionAttributes(GlobalDecl(), DestructorFn,
                                  DestructorFnInfo);
DestructorFn->setDoesNotRecurse();
CodeGenFunction CGF(CGM);
CGF.StartFunction(GlobalDecl(), KmpInt32Ty, DestructorFn, DestructorFnInfo,
                  Args, Loc, Loc);

LValue Base = CGF.EmitLoadOfPointerLValue(
    CGF.GetAddrOfLocalVar(&TaskTypeArg),
    KmpTaskTWithPrivatesPtrQTy->castAs<PointerType>());
const auto *KmpTaskTWithPrivatesQTyRD =
    cast<RecordDecl>(KmpTaskTWithPrivatesQTy->getAsTagDecl());
auto FI = std::next(KmpTaskTWithPrivatesQTyRD->field_begin());
Base = CGF.EmitLValueForField(Base, *FI);
for (const auto *Field :
     cast<RecordDecl>(FI->getType()->getAsTagDecl())->fields()) {
  if (QualType::DestructionKind DtorKind =
          Field->getType().isDestructedType()) {
    LValue FieldLValue = CGF.EmitLValueForField(Base, Field);
    CGF.pushDestroy(DtorKind, FieldLValue.getAddress(CGF), Field->getType());
  }
}
CGF.FinishFunction();
return DestructorFn;
3715}

3717/// Emit a privates mapping function for correct handling of private and
3718/// firstprivate variables.
3719/// \code
3720/// void .omp_task_privates_map.(const .privates. *noalias privs, <ty1>
3721/// **noalias priv1,...,  <tyn> **noalias privn) {
3722///   *priv1 = &.privates.priv1;
3723///   ...;
3724///   *privn = &.privates.privn;
3725/// }
3726/// \endcode
3727static llvm::Value *
3728emitTaskPrivateMappingFunction(CodeGenModule &CGM, SourceLocation Loc,
                             const OMPTaskDataTy &Data, QualType PrivatesQTy,
                             ArrayRef<PrivateDataTy> Privates) {
ASTContext &C = CGM.getContext();
FunctionArgList Args;
ImplicitParamDecl TaskPrivatesArg(
    C, /*DC=*/nullptr, Loc, /*Id=*/nullptr,
    C.getPointerType(PrivatesQTy).withConst().withRestrict(),
    ImplicitParamDecl::Other);
Args.push_back(&TaskPrivatesArg);
llvm::DenseMap<CanonicalDeclPtr<const VarDecl>, unsigned> PrivateVarsPos;
unsigned Counter = 1;
for (const Expr *E : Data.PrivateVars) {
  Args.push_back(ImplicitParamDecl::Create(
      C, /*DC=*/nullptr, Loc, /*Id=*/nullptr,
      C.getPointerType(C.getPointerType(E->getType()))
          .withConst()
          .withRestrict(),
      ImplicitParamDecl::Other));
  const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl());
  PrivateVarsPos[VD] = Counter;
  ++Counter;
}
for (const Expr *E : Data.FirstprivateVars) {
  Args.push_back(ImplicitParamDecl::Create(
      C, /*DC=*/nullptr, Loc, /*Id=*/nullptr,
      C.getPointerType(C.getPointerType(E->getType()))
          .withConst()
          .withRestrict(),
      ImplicitParamDecl::Other));
  const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl());
  PrivateVarsPos[VD] = Counter;
  ++Counter;
}
for (const Expr *E : Data.LastprivateVars) {
  Args.push_back(ImplicitParamDecl::Create(
      C, /*DC=*/nullptr, Loc, /*Id=*/nullptr,
      C.getPointerType(C.getPointerType(E->getType()))
          .withConst()
          .withRestrict(),
      ImplicitParamDecl::Other));
  const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl());
  PrivateVarsPos[VD] = Counter;
  ++Counter;
}
for (const VarDecl *VD : Data.PrivateLocals) {
  QualType Ty = VD->getType().getNonReferenceType();
  if (VD->getType()->isLValueReferenceType())
    Ty = C.getPointerType(Ty);
  if (isAllocatableDecl(VD))
    Ty = C.getPointerType(Ty);
  Args.push_back(ImplicitParamDecl::Create(
      C, /*DC=*/nullptr, Loc, /*Id=*/nullptr,
      C.getPointerType(C.getPointerType(Ty)).withConst().withRestrict(),
      ImplicitParamDecl::Other));
  PrivateVarsPos[VD] = Counter;
  ++Counter;
}
const auto &TaskPrivatesMapFnInfo =
    CGM.getTypes().arrangeBuiltinFunctionDeclaration(C.VoidTy, Args);
llvm::FunctionType *TaskPrivatesMapTy =
    CGM.getTypes().GetFunctionType(TaskPrivatesMapFnInfo);
std::string Name =
    CGM.getOpenMPRuntime().getName({"omp_task_privates_map", ""});
auto *TaskPrivatesMap = llvm::Function::Create(
    TaskPrivatesMapTy, llvm::GlobalValue::InternalLinkage, Name,
    &CGM.getModule());
CGM.SetInternalFunctionAttributes(GlobalDecl(), TaskPrivatesMap,
                                  TaskPrivatesMapFnInfo);
if (CGM.getLangOpts().Optimize) {
  TaskPrivatesMap->removeFnAttr(llvm::Attribute::NoInline);
  TaskPrivatesMap->removeFnAttr(llvm::Attribute::OptimizeNone);
  TaskPrivatesMap->addFnAttr(llvm::Attribute::AlwaysInline);
}
CodeGenFunction CGF(CGM);
CGF.StartFunction(GlobalDecl(), C.VoidTy, TaskPrivatesMap,
                  TaskPrivatesMapFnInfo, Args, Loc, Loc);

// *privi = &.privates.privi;
LValue Base = CGF.EmitLoadOfPointerLValue(
    CGF.GetAddrOfLocalVar(&TaskPrivatesArg),
    TaskPrivatesArg.getType()->castAs<PointerType>());
const auto *PrivatesQTyRD = cast<RecordDecl>(PrivatesQTy->getAsTagDecl());
Counter = 0;
for (const FieldDecl *Field : PrivatesQTyRD->fields()) {
  LValue FieldLVal = CGF.EmitLValueForField(Base, Field);
  const VarDecl *VD = Args[PrivateVarsPos[Privates[Counter].second.Original]];
  LValue RefLVal =
      CGF.MakeAddrLValue(CGF.GetAddrOfLocalVar(VD), VD->getType());
  LValue RefLoadLVal = CGF.EmitLoadOfPointerLValue(
      RefLVal.getAddress(CGF), RefLVal.getType()->castAs<PointerType>());
  CGF.EmitStoreOfScalar(FieldLVal.getPointer(CGF), RefLoadLVal);
  ++Counter;
}
CGF.FinishFunction();
return TaskPrivatesMap;
3824}

3826/// Emit initialization for private variables in task-based directives.
3827static void emitPrivatesInit(CodeGenFunction &CGF,
                           const OMPExecutableDirective &D,
                           Address KmpTaskSharedsPtr, LValue TDBase,
                           const RecordDecl *KmpTaskTWithPrivatesQTyRD,
                           QualType SharedsTy, QualType SharedsPtrTy,
                           const OMPTaskDataTy &Data,
                           ArrayRef<PrivateDataTy> Privates, bool ForDup) {
ASTContext &C = CGF.getContext();
auto FI = std::next(KmpTaskTWithPrivatesQTyRD->field_begin());
LValue PrivatesBase = CGF.EmitLValueForField(TDBase, *FI);
OpenMPDirectiveKind Kind = isOpenMPTaskLoopDirective(D.getDirectiveKind())
                               ? OMPD_taskloop
                               : OMPD_task;
const CapturedStmt &CS = *D.getCapturedStmt(Kind);
CodeGenFunction::CGCapturedStmtInfo CapturesInfo(CS);
LValue SrcBase;
bool IsTargetTask =
    isOpenMPTargetDataManagementDirective(D.getDirectiveKind()) ||
    isOpenMPTargetExecutionDirective(D.getDirectiveKind());
// For target-based directives skip 4 firstprivate arrays BasePointersArray,
// PointersArray, SizesArray, and MappersArray. The original variables for
// these arrays are not captured and we get their addresses explicitly.
if ((!IsTargetTask && !Data.FirstprivateVars.empty() && ForDup) ||
    (IsTargetTask && KmpTaskSharedsPtr.isValid())) {
  SrcBase = CGF.MakeAddrLValue(
      CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
          KmpTaskSharedsPtr, CGF.ConvertTypeForMem(SharedsPtrTy)),
      SharedsTy);
}
FI = cast<RecordDecl>(FI->getType()->getAsTagDecl())->field_begin();
for (const PrivateDataTy &Pair : Privates) {
  // Do not initialize private locals.
  if (Pair.second.isLocalPrivate()) {
    ++FI;
    continue;
  }
  const VarDecl *VD = Pair.second.PrivateCopy;
  const Expr *Init = VD->getAnyInitializer();
  if (Init && (!ForDup || (isa<CXXConstructExpr>(Init) &&
                           !CGF.isTrivialInitializer(Init)))) {
    LValue PrivateLValue = CGF.EmitLValueForField(PrivatesBase, *FI);
    if (const VarDecl *Elem = Pair.second.PrivateElemInit) {
      const VarDecl *OriginalVD = Pair.second.Original;
      // Check if the variable is the target-based BasePointersArray,
      // PointersArray, SizesArray, or MappersArray.
      LValue SharedRefLValue;
      QualType Type = PrivateLValue.getType();
      const FieldDecl *SharedField = CapturesInfo.lookup(OriginalVD);
      if (IsTargetTask && !SharedField) {
        assert(isa<ImplicitParamDecl>(OriginalVD) &&((void)0)
               isa<CapturedDecl>(OriginalVD->getDeclContext()) &&((void)0)
               cast<CapturedDecl>(OriginalVD->getDeclContext())((void)0)
                       ->getNumParams() == 0 &&((void)0)
               isa<TranslationUnitDecl>(((void)0)
                   cast<CapturedDecl>(OriginalVD->getDeclContext())((void)0)
                       ->getDeclContext()) &&((void)0)
               "Expected artificial target data variable.")((void)0);
        SharedRefLValue =
            CGF.MakeAddrLValue(CGF.GetAddrOfLocalVar(OriginalVD), Type);
      } else if (ForDup) {
        SharedRefLValue = CGF.EmitLValueForField(SrcBase, SharedField);
        SharedRefLValue = CGF.MakeAddrLValue(
            Address(SharedRefLValue.getPointer(CGF),
                    C.getDeclAlign(OriginalVD)),
            SharedRefLValue.getType(), LValueBaseInfo(AlignmentSource::Decl),
            SharedRefLValue.getTBAAInfo());
      } else if (CGF.LambdaCaptureFields.count(
                     Pair.second.Original->getCanonicalDecl()) > 0 ||
                 dyn_cast_or_null<BlockDecl>(CGF.CurCodeDecl)) {
        SharedRefLValue = CGF.EmitLValue(Pair.second.OriginalRef);
      } else {
        // Processing for implicitly captured variables.
        InlinedOpenMPRegionRAII Region(
            CGF, [](CodeGenFunction &, PrePostActionTy &) {}, OMPD_unknown,
            /*HasCancel=*/false, /*NoInheritance=*/true);
        SharedRefLValue = CGF.EmitLValue(Pair.second.OriginalRef);
      }
      if (Type->isArrayType()) {
        // Initialize firstprivate array.
        if (!isa<CXXConstructExpr>(Init) || CGF.isTrivialInitializer(Init)) {
          // Perform simple memcpy.
          CGF.EmitAggregateAssign(PrivateLValue, SharedRefLValue, Type);
        } else {
          // Initialize firstprivate array using element-by-element
          // initialization.
          CGF.EmitOMPAggregateAssign(
              PrivateLValue.getAddress(CGF), SharedRefLValue.getAddress(CGF),
              Type,
              [&CGF, Elem, Init, &CapturesInfo](Address DestElement,
                                                Address SrcElement) {
                // Clean up any temporaries needed by the initialization.
                CodeGenFunction::OMPPrivateScope InitScope(CGF);
                InitScope.addPrivate(
                    Elem, [SrcElement]() -> Address { return SrcElement; });
                (void)InitScope.Privatize();
                // Emit initialization for single element.
                CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(
                    CGF, &CapturesInfo);
                CGF.EmitAnyExprToMem(Init, DestElement,
                                     Init->getType().getQualifiers(),
                                     /*IsInitializer=*/false);
              });
        }
      } else {
        CodeGenFunction::OMPPrivateScope InitScope(CGF);
        InitScope.addPrivate(Elem, [SharedRefLValue, &CGF]() -> Address {
          return SharedRefLValue.getAddress(CGF);
        });
        (void)InitScope.Privatize();
        CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(CGF, &CapturesInfo);
        CGF.EmitExprAsInit(Init, VD, PrivateLValue,
                           /*capturedByInit=*/false);
      }
    } else {
      CGF.EmitExprAsInit(Init, VD, PrivateLValue, /*capturedByInit=*/false);
    }
  }
  ++FI;
}
3946}

3948/// Check if duplication function is required for taskloops.
3949static bool checkInitIsRequired(CodeGenFunction &CGF,
                              ArrayRef<PrivateDataTy> Privates) {
bool InitRequired = false;
for (const PrivateDataTy &Pair : Privates) {
  if (Pair.second.isLocalPrivate())
    continue;
  const VarDecl *VD = Pair.second.PrivateCopy;
  const Expr *Init = VD->getAnyInitializer();
  InitRequired = InitRequired || (Init && isa<CXXConstructExpr>(Init) &&
                                  !CGF.isTrivialInitializer(Init));
  if (InitRequired)
    break;
}
return InitRequired;
3963}


3966/// Emit task_dup function (for initialization of
3967/// private/firstprivate/lastprivate vars and last_iter flag)
3968/// \code
3969/// void __task_dup_entry(kmp_task_t *task_dst, const kmp_task_t *task_src, int
3970/// lastpriv) {
3971/// // setup lastprivate flag
3972///    task_dst->last = lastpriv;
3973/// // could be constructor calls here...
3974/// }
3975/// \endcode
3976static llvm::Value *
3977emitTaskDupFunction(CodeGenModule &CGM, SourceLocation Loc,
                  const OMPExecutableDirective &D,
                  QualType KmpTaskTWithPrivatesPtrQTy,
                  const RecordDecl *KmpTaskTWithPrivatesQTyRD,
                  const RecordDecl *KmpTaskTQTyRD, QualType SharedsTy,
                  QualType SharedsPtrTy, const OMPTaskDataTy &Data,
                  ArrayRef<PrivateDataTy> Privates, bool WithLastIter) {
ASTContext &C = CGM.getContext();
FunctionArgList Args;
ImplicitParamDecl DstArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr,
                         KmpTaskTWithPrivatesPtrQTy,
                         ImplicitParamDecl::Other);
ImplicitParamDecl SrcArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr,
                         KmpTaskTWithPrivatesPtrQTy,
                         ImplicitParamDecl::Other);
ImplicitParamDecl LastprivArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, C.IntTy,
                              ImplicitParamDecl::Other);
Args.push_back(&DstArg);
Args.push_back(&SrcArg);
Args.push_back(&LastprivArg);
const auto &TaskDupFnInfo =
    CGM.getTypes().arrangeBuiltinFunctionDeclaration(C.VoidTy, Args);
llvm::FunctionType *TaskDupTy = CGM.getTypes().GetFunctionType(TaskDupFnInfo);
std::string Name = CGM.getOpenMPRuntime().getName({"omp_task_dup", ""});
auto *TaskDup = llvm::Function::Create(
    TaskDupTy, llvm::GlobalValue::InternalLinkage, Name, &CGM.getModule());
CGM.SetInternalFunctionAttributes(GlobalDecl(), TaskDup, TaskDupFnInfo);
TaskDup->setDoesNotRecurse();
CodeGenFunction CGF(CGM);
CGF.StartFunction(GlobalDecl(), C.VoidTy, TaskDup, TaskDupFnInfo, Args, Loc,
                  Loc);

LValue TDBase = CGF.EmitLoadOfPointerLValue(
    CGF.GetAddrOfLocalVar(&DstArg),
    KmpTaskTWithPrivatesPtrQTy->castAs<PointerType>());
// task_dst->liter = lastpriv;
if (WithLastIter) {
  auto LIFI = std::next(KmpTaskTQTyRD->field_begin(), KmpTaskTLastIter);
  LValue Base = CGF.EmitLValueForField(
      TDBase, *KmpTaskTWithPrivatesQTyRD->field_begin());
  LValue LILVal = CGF.EmitLValueForField(Base, *LIFI);
  llvm::Value *Lastpriv = CGF.EmitLoadOfScalar(
      CGF.GetAddrOfLocalVar(&LastprivArg), /*Volatile=*/false, C.IntTy, Loc);
  CGF.EmitStoreOfScalar(Lastpriv, LILVal);
}

// Emit initial values for private copies (if any).
assert(!Privates.empty())((void)0);
Address KmpTaskSharedsPtr = Address::invalid();
if (!Data.FirstprivateVars.empty()) {
  LValue TDBase = CGF.EmitLoadOfPointerLValue(
      CGF.GetAddrOfLocalVar(&SrcArg),
      KmpTaskTWithPrivatesPtrQTy->castAs<PointerType>());
  LValue Base = CGF.EmitLValueForField(
      TDBase, *KmpTaskTWithPrivatesQTyRD->field_begin());
  KmpTaskSharedsPtr = Address(
      CGF.EmitLoadOfScalar(CGF.EmitLValueForField(
                               Base, *std::next(KmpTaskTQTyRD->field_begin(),
                                                KmpTaskTShareds)),
                           Loc),
      CGM.getNaturalTypeAlignment(SharedsTy));
}
emitPrivatesInit(CGF, D, KmpTaskSharedsPtr, TDBase, KmpTaskTWithPrivatesQTyRD,
                 SharedsTy, SharedsPtrTy, Data, Privates, /*ForDup=*/true);
CGF.FinishFunction();
return TaskDup;
4043}

4045/// Checks if destructor function is required to be generated.
4046/// \return true if cleanups are required, false otherwise.
4047static bool
4048checkDestructorsRequired(const RecordDecl *KmpTaskTWithPrivatesQTyRD,
                       ArrayRef<PrivateDataTy> Privates) {
for (const PrivateDataTy &P : Privates) {
  if (P.second.isLocalPrivate())
    continue;
  QualType Ty = P.second.Original->getType().getNonReferenceType();
  if (Ty.isDestructedType())
    return true;
}
return false;
4058}

4060namespace {
4061/// Loop generator for OpenMP iterator expression.
4062class OMPIteratorGeneratorScope final
  : public CodeGenFunction::OMPPrivateScope {
CodeGenFunction &CGF;
const OMPIteratorExpr *E = nullptr;
SmallVector<CodeGenFunction::JumpDest, 4> ContDests;
SmallVector<CodeGenFunction::JumpDest, 4> ExitDests;
OMPIteratorGeneratorScope() = delete;
OMPIteratorGeneratorScope(OMPIteratorGeneratorScope &) = delete;

4071public:
OMPIteratorGeneratorScope(CodeGenFunction &CGF, const OMPIteratorExpr *E)
    : CodeGenFunction::OMPPrivateScope(CGF), CGF(CGF), E(E) {
  if (!E)
    return;
  SmallVector<llvm::Value *, 4> Uppers;
  for (unsigned I = 0, End = E->numOfIterators(); I < End; ++I) {
    Uppers.push_back(CGF.EmitScalarExpr(E->getHelper(I).Upper));
    const auto *VD = cast<VarDecl>(E->getIteratorDecl(I));
    addPrivate(VD, [&CGF, VD]() {
      return CGF.CreateMemTemp(VD->getType(), VD->getName());
    });
    const OMPIteratorHelperData &HelperData = E->getHelper(I);
    addPrivate(HelperData.CounterVD, [&CGF, &HelperData]() {
      return CGF.CreateMemTemp(HelperData.CounterVD->getType(),
                               "counter.addr");
    });
  }
  Privatize();

  for (unsigned I = 0, End = E->numOfIterators(); I < End; ++I) {
    const OMPIteratorHelperData &HelperData = E->getHelper(I);
    LValue CLVal =
        CGF.MakeAddrLValue(CGF.GetAddrOfLocalVar(HelperData.CounterVD),
                           HelperData.CounterVD->getType());
    // Counter = 0;
    CGF.EmitStoreOfScalar(
        llvm::ConstantInt::get(CLVal.getAddress(CGF).getElementType(), 0),
        CLVal);
    CodeGenFunction::JumpDest &ContDest =
        ContDests.emplace_back(CGF.getJumpDestInCurrentScope("iter.cont"));
    CodeGenFunction::JumpDest &ExitDest =
        ExitDests.emplace_back(CGF.getJumpDestInCurrentScope("iter.exit"));
    // N = <number-of_iterations>;
    llvm::Value *N = Uppers[I];
    // cont:
    // if (Counter < N) goto body; else goto exit;
    CGF.EmitBlock(ContDest.getBlock());
    auto *CVal =
        CGF.EmitLoadOfScalar(CLVal, HelperData.CounterVD->getLocation());
    llvm::Value *Cmp =
        HelperData.CounterVD->getType()->isSignedIntegerOrEnumerationType()
            ? CGF.Builder.CreateICmpSLT(CVal, N)
            : CGF.Builder.CreateICmpULT(CVal, N);
    llvm::BasicBlock *BodyBB = CGF.createBasicBlock("iter.body");
    CGF.Builder.CreateCondBr(Cmp, BodyBB, ExitDest.getBlock());
    // body:
    CGF.EmitBlock(BodyBB);
    // Iteri = Begini + Counter * Stepi;
    CGF.EmitIgnoredExpr(HelperData.Update);
  }
}
~OMPIteratorGeneratorScope() {
  if (!E)
    return;
  for (unsigned I = E->numOfIterators(); I > 0; --I) {
    // Counter = Counter + 1;
    const OMPIteratorHelperData &HelperData = E->getHelper(I - 1);
    CGF.EmitIgnoredExpr(HelperData.CounterUpdate);
    // goto cont;
    CGF.EmitBranchThroughCleanup(ContDests[I - 1]);
    // exit:
    CGF.EmitBlock(ExitDests[I - 1].getBlock(), /*IsFinished=*/I == 1);
  }
}
4136};
4137} // namespace

4139static std::pair<llvm::Value *, llvm::Value *>
4140getPointerAndSize(CodeGenFunction &CGF, const Expr *E) {
const auto *OASE = dyn_cast<OMPArrayShapingExpr>(E);
llvm::Value *Addr;
if (OASE) {
  const Expr *Base = OASE->getBase();
  Addr = CGF.EmitScalarExpr(Base);
} else {
  Addr = CGF.EmitLValue(E).getPointer(CGF);
}
llvm::Value *SizeVal;
QualType Ty = E->getType();
if (OASE) {
  SizeVal = CGF.getTypeSize(OASE->getBase()->getType()->getPointeeType());
  for (const Expr *SE : OASE->getDimensions()) {
    llvm::Value *Sz = CGF.EmitScalarExpr(SE);
    Sz = CGF.EmitScalarConversion(
        Sz, SE->getType(), CGF.getContext().getSizeType(), SE->getExprLoc());
    SizeVal = CGF.Builder.CreateNUWMul(SizeVal, Sz);
  }
} else if (const auto *ASE =
               dyn_cast<OMPArraySectionExpr>(E->IgnoreParenImpCasts())) {
  LValue UpAddrLVal =
      CGF.EmitOMPArraySectionExpr(ASE, /*IsLowerBound=*/false);
  Address UpAddrAddress = UpAddrLVal.getAddress(CGF);
  llvm::Value *UpAddr = CGF.Builder.CreateConstGEP1_32(
      UpAddrAddress.getElementType(), UpAddrAddress.getPointer(), /*Idx0=*/1);
  llvm::Value *LowIntPtr = CGF.Builder.CreatePtrToInt(Addr, CGF.SizeTy);
  llvm::Value *UpIntPtr = CGF.Builder.CreatePtrToInt(UpAddr, CGF.SizeTy);
  SizeVal = CGF.Builder.CreateNUWSub(UpIntPtr, LowIntPtr);
} else {
  SizeVal = CGF.getTypeSize(Ty);
}
return std::make_pair(Addr, SizeVal);
4173}

4175/// Builds kmp_depend_info, if it is not built yet, and builds flags type.
4176static void getKmpAffinityType(ASTContext &C, QualType &KmpTaskAffinityInfoTy) {
QualType FlagsTy = C.getIntTypeForBitwidth(32, /*Signed=*/false);
if (KmpTaskAffinityInfoTy.isNull()) {
  RecordDecl *KmpAffinityInfoRD =
      C.buildImplicitRecord("kmp_task_affinity_info_t");
  KmpAffinityInfoRD->startDefinition();
  addFieldToRecordDecl(C, KmpAffinityInfoRD, C.getIntPtrType());
  addFieldToRecordDecl(C, KmpAffinityInfoRD, C.getSizeType());
  addFieldToRecordDecl(C, KmpAffinityInfoRD, FlagsTy);
  KmpAffinityInfoRD->completeDefinition();
  KmpTaskAffinityInfoTy = C.getRecordType(KmpAffinityInfoRD);
}
4188}

4190CGOpenMPRuntime::TaskResultTy
4191CGOpenMPRuntime::emitTaskInit(CodeGenFunction &CGF, SourceLocation Loc,
                            const OMPExecutableDirective &D,
                            llvm::Function *TaskFunction, QualType SharedsTy,
                            Address Shareds, const OMPTaskDataTy &Data) {
ASTContext &C = CGM.getContext();
llvm::SmallVector<PrivateDataTy, 4> Privates;
// Aggregate privates and sort them by the alignment.
const auto *I = Data.PrivateCopies.begin();
for (const Expr *E : Data.PrivateVars) {
  const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl());
  Privates.emplace_back(
      C.getDeclAlign(VD),
      PrivateHelpersTy(E, VD, cast<VarDecl>(cast<DeclRefExpr>(*I)->getDecl()),
                       /*PrivateElemInit=*/nullptr));
  ++I;
}
I = Data.FirstprivateCopies.begin();
const auto *IElemInitRef = Data.FirstprivateInits.begin();
for (const Expr *E : Data.FirstprivateVars) {
  const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl());
  Privates.emplace_back(
      C.getDeclAlign(VD),
      PrivateHelpersTy(
          E, VD, cast<VarDecl>(cast<DeclRefExpr>(*I)->getDecl()),
          cast<VarDecl>(cast<DeclRefExpr>(*IElemInitRef)->getDecl())));
  ++I;
  ++IElemInitRef;
}
I = Data.LastprivateCopies.begin();
for (const Expr *E : Data.LastprivateVars) {
  const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(E)->getDecl());
  Privates.emplace_back(
      C.getDeclAlign(VD),
      PrivateHelpersTy(E, VD, cast<VarDecl>(cast<DeclRefExpr>(*I)->getDecl()),
                       /*PrivateElemInit=*/nullptr));
  ++I;
}
for (const VarDecl *VD : Data.PrivateLocals) {
  if (isAllocatableDecl(VD))
    Privates.emplace_back(CGM.getPointerAlign(), PrivateHelpersTy(VD));
  else
    Privates.emplace_back(C.getDeclAlign(VD), PrivateHelpersTy(VD));
}
llvm::stable_sort(Privates,
                  [](const PrivateDataTy &L, const PrivateDataTy &R) {
                    return L.first > R.first;
                  });
QualType KmpInt32Ty = C.getIntTypeForBitwidth(/*DestWidth=*/32, /*Signed=*/1);
// Build type kmp_routine_entry_t (if not built yet).
emitKmpRoutineEntryT(KmpInt32Ty);
// Build type kmp_task_t (if not built yet).
if (isOpenMPTaskLoopDirective(D.getDirectiveKind())) {
  if (SavedKmpTaskloopTQTy.isNull()) {
    SavedKmpTaskloopTQTy = C.getRecordType(createKmpTaskTRecordDecl(
        CGM, D.getDirectiveKind(), KmpInt32Ty, KmpRoutineEntryPtrQTy));
  }
  KmpTaskTQTy = SavedKmpTaskloopTQTy;
} else {
  assert((D.getDirectiveKind() == OMPD_task ||((void)0)
          isOpenMPTargetExecutionDirective(D.getDirectiveKind()) ||((void)0)
          isOpenMPTargetDataManagementDirective(D.getDirectiveKind())) &&((void)0)
         "Expected taskloop, task or target directive")((void)0);
  if (SavedKmpTaskTQTy.isNull()) {
    SavedKmpTaskTQTy = C.getRecordType(createKmpTaskTRecordDecl(
        CGM, D.getDirectiveKind(), KmpInt32Ty, KmpRoutineEntryPtrQTy));
  }
  KmpTaskTQTy = SavedKmpTaskTQTy;
}
const auto *KmpTaskTQTyRD = cast<RecordDecl>(KmpTaskTQTy->getAsTagDecl());
// Build particular struct kmp_task_t for the given task.
const RecordDecl *KmpTaskTWithPrivatesQTyRD =
    createKmpTaskTWithPrivatesRecordDecl(CGM, KmpTaskTQTy, Privates);
QualType KmpTaskTWithPrivatesQTy = C.getRecordType(KmpTaskTWithPrivatesQTyRD);
QualType KmpTaskTWithPrivatesPtrQTy =
    C.getPointerType(KmpTaskTWithPrivatesQTy);
llvm::Type *KmpTaskTWithPrivatesTy = CGF.ConvertType(KmpTaskTWithPrivatesQTy);
llvm::Type *KmpTaskTWithPrivatesPtrTy =
    KmpTaskTWithPrivatesTy->getPointerTo();
llvm::Value *KmpTaskTWithPrivatesTySize =
    CGF.getTypeSize(KmpTaskTWithPrivatesQTy);
QualType SharedsPtrTy = C.getPointerType(SharedsTy);

// Emit initial values for private copies (if any).
llvm::Value *TaskPrivatesMap = nullptr;
llvm::Type *TaskPrivatesMapTy =
    std::next(TaskFunction->arg_begin(), 3)->getType();
if (!Privates.empty()) {
  auto FI = std::next(KmpTaskTWithPrivatesQTyRD->field_begin());
  TaskPrivatesMap =
      emitTaskPrivateMappingFunction(CGM, Loc, Data, FI->getType(), Privates);
  TaskPrivatesMap = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
      TaskPrivatesMap, TaskPrivatesMapTy);
} else {
  TaskPrivatesMap = llvm::ConstantPointerNull::get(
      cast<llvm::PointerType>(TaskPrivatesMapTy));
}
// Build a proxy function kmp_int32 .omp_task_entry.(kmp_int32 gtid,
// kmp_task_t *tt);
llvm::Function *TaskEntry = emitProxyTaskFunction(
    CGM, Loc, D.getDirectiveKind(), KmpInt32Ty, KmpTaskTWithPrivatesPtrQTy,
    KmpTaskTWithPrivatesQTy, KmpTaskTQTy, SharedsPtrTy, TaskFunction,
    TaskPrivatesMap);

// Build call kmp_task_t * __kmpc_omp_task_alloc(ident_t *, kmp_int32 gtid,
// kmp_int32 flags, size_t sizeof_kmp_task_t, size_t sizeof_shareds,
// kmp_routine_entry_t *task_entry);
// Task flags. Format is taken from
// https://github.com/llvm/llvm-project/blob/main/openmp/runtime/src/kmp.h,
// description of kmp_tasking_flags struct.
enum {
  TiedFlag = 0x1,
  FinalFlag = 0x2,
  DestructorsFlag = 0x8,
  PriorityFlag = 0x20,
  DetachableFlag = 0x40,
};
unsigned Flags = Data.Tied ? TiedFlag : 0;
bool NeedsCleanup = false;
if (!Privates.empty()) {
  NeedsCleanup =
      checkDestructorsRequired(KmpTaskTWithPrivatesQTyRD, Privates);
  if (NeedsCleanup)
    Flags = Flags | DestructorsFlag;
}
if (Data.Priority.getInt())
  Flags = Flags | PriorityFlag;
if (D.hasClausesOfKind<OMPDetachClause>())
  Flags = Flags | DetachableFlag;
llvm::Value *TaskFlags =
    Data.Final.getPointer()
        ? CGF.Builder.CreateSelect(Data.Final.getPointer(),
                                   CGF.Builder.getInt32(FinalFlag),
                                   CGF.Builder.getInt32(/*C=*/0))
        : CGF.Builder.getInt32(Data.Final.getInt() ? FinalFlag : 0);
TaskFlags = CGF.Builder.CreateOr(TaskFlags, CGF.Builder.getInt32(Flags));
llvm::Value *SharedsSize = CGM.getSize(C.getTypeSizeInChars(SharedsTy));
SmallVector<llvm::Value *, 8> AllocArgs = {emitUpdateLocation(CGF, Loc),
    getThreadID(CGF, Loc), TaskFlags, KmpTaskTWithPrivatesTySize,
    SharedsSize, CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
        TaskEntry, KmpRoutineEntryPtrTy)};
llvm::Value *NewTask;
if (D.hasClausesOfKind<OMPNowaitClause>()) {
  // Check if we have any device clause associated with the directive.
  const Expr *Device = nullptr;
  if (auto *C = D.getSingleClause<OMPDeviceClause>())
    Device = C->getDevice();
  // Emit device ID if any otherwise use default value.
  llvm::Value *DeviceID;
  if (Device)
    DeviceID = CGF.Builder.CreateIntCast(CGF.EmitScalarExpr(Device),
                                         CGF.Int64Ty, /*isSigned=*/true);
  else
    DeviceID = CGF.Builder.getInt64(OMP_DEVICEID_UNDEF);
  AllocArgs.push_back(DeviceID);
  NewTask = CGF.EmitRuntimeCall(
      OMPBuilder.getOrCreateRuntimeFunction(
          CGM.getModule(), OMPRTL___kmpc_omp_target_task_alloc),
      AllocArgs);
} else {
  NewTask =
      CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                              CGM.getModule(), OMPRTL___kmpc_omp_task_alloc),
                          AllocArgs);
}
// Emit detach clause initialization.
// evt = (typeof(evt))__kmpc_task_allow_completion_event(loc, tid,
// task_descriptor);
if (const auto *DC = D.getSingleClause<OMPDetachClause>()) {
  const Expr *Evt = DC->getEventHandler()->IgnoreParenImpCasts();
  LValue EvtLVal = CGF.EmitLValue(Evt);

  // Build kmp_event_t *__kmpc_task_allow_completion_event(ident_t *loc_ref,
  // int gtid, kmp_task_t *task);
  llvm::Value *Loc = emitUpdateLocation(CGF, DC->getBeginLoc());
  llvm::Value *Tid = getThreadID(CGF, DC->getBeginLoc());
  Tid = CGF.Builder.CreateIntCast(Tid, CGF.IntTy, /*isSigned=*/false);
  llvm::Value *EvtVal = CGF.EmitRuntimeCall(
      OMPBuilder.getOrCreateRuntimeFunction(
          CGM.getModule(), OMPRTL___kmpc_task_allow_completion_event),
      {Loc, Tid, NewTask});
  EvtVal = CGF.EmitScalarConversion(EvtVal, C.VoidPtrTy, Evt->getType(),
                                    Evt->getExprLoc());
  CGF.EmitStoreOfScalar(EvtVal, EvtLVal);
}
// Process affinity clauses.
if (D.hasClausesOfKind<OMPAffinityClause>()) {
  // Process list of affinity data.
  ASTContext &C = CGM.getContext();
  Address AffinitiesArray = Address::invalid();
  // Calculate number of elements to form the array of affinity data.
  llvm::Value *NumOfElements = nullptr;
  unsigned NumAffinities = 0;
  for (const auto *C : D.getClausesOfKind<OMPAffinityClause>()) {
    if (const Expr *Modifier = C->getModifier()) {
      const auto *IE = cast<OMPIteratorExpr>(Modifier->IgnoreParenImpCasts());
      for (unsigned I = 0, E = IE->numOfIterators(); I < E; ++I) {
        llvm::Value *Sz = CGF.EmitScalarExpr(IE->getHelper(I).Upper);
        Sz = CGF.Builder.CreateIntCast(Sz, CGF.SizeTy, /*isSigned=*/false);
        NumOfElements =
            NumOfElements ? CGF.Builder.CreateNUWMul(NumOfElements, Sz) : Sz;
      }
    } else {
      NumAffinities += C->varlist_size();
    }
  }
  getKmpAffinityType(CGM.getContext(), KmpTaskAffinityInfoTy);
  // Fields ids in kmp_task_affinity_info record.
  enum RTLAffinityInfoFieldsTy { BaseAddr, Len, Flags };

  QualType KmpTaskAffinityInfoArrayTy;
  if (NumOfElements) {
    NumOfElements = CGF.Builder.CreateNUWAdd(
        llvm::ConstantInt::get(CGF.SizeTy, NumAffinities), NumOfElements);
    OpaqueValueExpr OVE(
        Loc,
        C.getIntTypeForBitwidth(C.getTypeSize(C.getSizeType()), /*Signed=*/0),
        VK_PRValue);
    CodeGenFunction::OpaqueValueMapping OpaqueMap(CGF, &OVE,
                                                  RValue::get(NumOfElements));
    KmpTaskAffinityInfoArrayTy =
        C.getVariableArrayType(KmpTaskAffinityInfoTy, &OVE, ArrayType::Normal,
                               /*IndexTypeQuals=*/0, SourceRange(Loc, Loc));
    // Properly emit variable-sized array.
    auto *PD = ImplicitParamDecl::Create(C, KmpTaskAffinityInfoArrayTy,
                                         ImplicitParamDecl::Other);
    CGF.EmitVarDecl(*PD);
    AffinitiesArray = CGF.GetAddrOfLocalVar(PD);
    NumOfElements = CGF.Builder.CreateIntCast(NumOfElements, CGF.Int32Ty,
                                              /*isSigned=*/false);
  } else {
    KmpTaskAffinityInfoArrayTy = C.getConstantArrayType(
        KmpTaskAffinityInfoTy,
        llvm::APInt(C.getTypeSize(C.getSizeType()), NumAffinities), nullptr,
        ArrayType::Normal, /*IndexTypeQuals=*/0);
    AffinitiesArray =
        CGF.CreateMemTemp(KmpTaskAffinityInfoArrayTy, ".affs.arr.addr");
    AffinitiesArray = CGF.Builder.CreateConstArrayGEP(AffinitiesArray, 0);
    NumOfElements = llvm::ConstantInt::get(CGM.Int32Ty, NumAffinities,
                                           /*isSigned=*/false);
  }

  const auto *KmpAffinityInfoRD = KmpTaskAffinityInfoTy->getAsRecordDecl();
  // Fill array by elements without iterators.
  unsigned Pos = 0;
  bool HasIterator = false;
  for (const auto *C : D.getClausesOfKind<OMPAffinityClause>()) {
    if (C->getModifier()) {
      HasIterator = true;
      continue;
    }
    for (const Expr *E : C->varlists()) {
      llvm::Value *Addr;
      llvm::Value *Size;
      std::tie(Addr, Size) = getPointerAndSize(CGF, E);
      LValue Base =
          CGF.MakeAddrLValue(CGF.Builder.CreateConstGEP(AffinitiesArray, Pos),
                             KmpTaskAffinityInfoTy);
      // affs[i].base_addr = &<Affinities[i].second>;
      LValue BaseAddrLVal = CGF.EmitLValueForField(
          Base, *std::next(KmpAffinityInfoRD->field_begin(), BaseAddr));
      CGF.EmitStoreOfScalar(CGF.Builder.CreatePtrToInt(Addr, CGF.IntPtrTy),
                            BaseAddrLVal);
      // affs[i].len = sizeof(<Affinities[i].second>);
      LValue LenLVal = CGF.EmitLValueForField(
          Base, *std::next(KmpAffinityInfoRD->field_begin(), Len));
      CGF.EmitStoreOfScalar(Size, LenLVal);
      ++Pos;
    }
  }
  LValue PosLVal;
  if (HasIterator) {
    PosLVal = CGF.MakeAddrLValue(
        CGF.CreateMemTemp(C.getSizeType(), "affs.counter.addr"),
        C.getSizeType());
    CGF.EmitStoreOfScalar(llvm::ConstantInt::get(CGF.SizeTy, Pos), PosLVal);
  }
  // Process elements with iterators.
  for (const auto *C : D.getClausesOfKind<OMPAffinityClause>()) {
    const Expr *Modifier = C->getModifier();
    if (!Modifier)
      continue;
    OMPIteratorGeneratorScope IteratorScope(
        CGF, cast_or_null<OMPIteratorExpr>(Modifier->IgnoreParenImpCasts()));
    for (const Expr *E : C->varlists()) {
      llvm::Value *Addr;
      llvm::Value *Size;
      std::tie(Addr, Size) = getPointerAndSize(CGF, E);
      llvm::Value *Idx = CGF.EmitLoadOfScalar(PosLVal, E->getExprLoc());
      LValue Base = CGF.MakeAddrLValue(
          Address(CGF.Builder.CreateGEP(AffinitiesArray.getElementType(),
                                        AffinitiesArray.getPointer(), Idx),
                  AffinitiesArray.getAlignment()),
          KmpTaskAffinityInfoTy);
      // affs[i].base_addr = &<Affinities[i].second>;
      LValue BaseAddrLVal = CGF.EmitLValueForField(
          Base, *std::next(KmpAffinityInfoRD->field_begin(), BaseAddr));
      CGF.EmitStoreOfScalar(CGF.Builder.CreatePtrToInt(Addr, CGF.IntPtrTy),
                            BaseAddrLVal);
      // affs[i].len = sizeof(<Affinities[i].second>);
      LValue LenLVal = CGF.EmitLValueForField(
          Base, *std::next(KmpAffinityInfoRD->field_begin(), Len));
      CGF.EmitStoreOfScalar(Size, LenLVal);
      Idx = CGF.Builder.CreateNUWAdd(
          Idx, llvm::ConstantInt::get(Idx->getType(), 1));
      CGF.EmitStoreOfScalar(Idx, PosLVal);
    }
  }
  // Call to kmp_int32 __kmpc_omp_reg_task_with_affinity(ident_t *loc_ref,
  // kmp_int32 gtid, kmp_task_t *new_task, kmp_int32
  // naffins, kmp_task_affinity_info_t *affin_list);
  llvm::Value *LocRef = emitUpdateLocation(CGF, Loc);
  llvm::Value *GTid = getThreadID(CGF, Loc);
  llvm::Value *AffinListPtr = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
      AffinitiesArray.getPointer(), CGM.VoidPtrTy);
  // FIXME: Emit the function and ignore its result for now unless the
  // runtime function is properly implemented.
  (void)CGF.EmitRuntimeCall(
      OMPBuilder.getOrCreateRuntimeFunction(
          CGM.getModule(), OMPRTL___kmpc_omp_reg_task_with_affinity),
      {LocRef, GTid, NewTask, NumOfElements, AffinListPtr});
}
llvm::Value *NewTaskNewTaskTTy =
    CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
        NewTask, KmpTaskTWithPrivatesPtrTy);
LValue Base = CGF.MakeNaturalAlignAddrLValue(NewTaskNewTaskTTy,
                                             KmpTaskTWithPrivatesQTy);
LValue TDBase =
    CGF.EmitLValueForField(Base, *KmpTaskTWithPrivatesQTyRD->field_begin());
// Fill the data in the resulting kmp_task_t record.
// Copy shareds if there are any.
Address KmpTaskSharedsPtr = Address::invalid();
if (!SharedsTy->getAsStructureType()->getDecl()->field_empty()) {
  KmpTaskSharedsPtr =
      Address(CGF.EmitLoadOfScalar(
                  CGF.EmitLValueForField(
                      TDBase, *std::next(KmpTaskTQTyRD->field_begin(),
                                         KmpTaskTShareds)),
                  Loc),
              CGM.getNaturalTypeAlignment(SharedsTy));
  LValue Dest = CGF.MakeAddrLValue(KmpTaskSharedsPtr, SharedsTy);
  LValue Src = CGF.MakeAddrLValue(Shareds, SharedsTy);
  CGF.EmitAggregateCopy(Dest, Src, SharedsTy, AggValueSlot::DoesNotOverlap);
}
// Emit initial values for private copies (if any).
TaskResultTy Result;
if (!Privates.empty()) {
  emitPrivatesInit(CGF, D, KmpTaskSharedsPtr, Base, KmpTaskTWithPrivatesQTyRD,
                   SharedsTy, SharedsPtrTy, Data, Privates,
                   /*ForDup=*/false);
  if (isOpenMPTaskLoopDirective(D.getDirectiveKind()) &&
      (!Data.LastprivateVars.empty() || checkInitIsRequired(CGF, Privates))) {
    Result.TaskDupFn = emitTaskDupFunction(
        CGM, Loc, D, KmpTaskTWithPrivatesPtrQTy, KmpTaskTWithPrivatesQTyRD,
        KmpTaskTQTyRD, SharedsTy, SharedsPtrTy, Data, Privates,
        /*WithLastIter=*/!Data.LastprivateVars.empty());
  }
}
// Fields of union "kmp_cmplrdata_t" for destructors and priority.
enum { Priority = 0, Destructors = 1 };
// Provide pointer to function with destructors for privates.
auto FI = std::next(KmpTaskTQTyRD->field_begin(), Data1);
const RecordDecl *KmpCmplrdataUD =
    (*FI)->getType()->getAsUnionType()->getDecl();
if (NeedsCleanup) {
  llvm::Value *DestructorFn = emitDestructorsFunction(
      CGM, Loc, KmpInt32Ty, KmpTaskTWithPrivatesPtrQTy,
      KmpTaskTWithPrivatesQTy);
  LValue Data1LV = CGF.EmitLValueForField(TDBase, *FI);
  LValue DestructorsLV = CGF.EmitLValueForField(
      Data1LV, *std::next(KmpCmplrdataUD->field_begin(), Destructors));
  CGF.EmitStoreOfScalar(CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
                            DestructorFn, KmpRoutineEntryPtrTy),
                        DestructorsLV);
}
// Set priority.
if (Data.Priority.getInt()) {
  LValue Data2LV = CGF.EmitLValueForField(
      TDBase, *std::next(KmpTaskTQTyRD->field_begin(), Data2));
  LValue PriorityLV = CGF.EmitLValueForField(
      Data2LV, *std::next(KmpCmplrdataUD->field_begin(), Priority));
  CGF.EmitStoreOfScalar(Data.Priority.getPointer(), PriorityLV);
}
Result.NewTask = NewTask;
Result.TaskEntry = TaskEntry;
Result.NewTaskNewTaskTTy = NewTaskNewTaskTTy;
Result.TDBase = TDBase;
Result.KmpTaskTQTyRD = KmpTaskTQTyRD;
return Result;
4579}

4581namespace {
4582/// Dependence kind for RTL.
4583enum RTLDependenceKindTy {
DepIn = 0x01,
DepInOut = 0x3,
DepMutexInOutSet = 0x4
4587};
4588/// Fields ids in kmp_depend_info record.
4589enum RTLDependInfoFieldsTy { BaseAddr, Len, Flags };
4590} // namespace

4592/// Translates internal dependency kind into the runtime kind.
4593static RTLDependenceKindTy translateDependencyKind(OpenMPDependClauseKind K) {
RTLDependenceKindTy DepKind;
switch (K) {
case OMPC_DEPEND_in:
  DepKind = DepIn;
  break;
// Out and InOut dependencies must use the same code.
case OMPC_DEPEND_out:
case OMPC_DEPEND_inout:
  DepKind = DepInOut;
  break;
case OMPC_DEPEND_mutexinoutset:
  DepKind = DepMutexInOutSet;
  break;
case OMPC_DEPEND_source:
case OMPC_DEPEND_sink:
case OMPC_DEPEND_depobj:
case OMPC_DEPEND_unknown:
  llvm_unreachable("Unknown task dependence type")__builtin_unreachable();
}
return DepKind;
4614}

4616/// Builds kmp_depend_info, if it is not built yet, and builds flags type.
4617static void getDependTypes(ASTContext &C, QualType &KmpDependInfoTy,
                         QualType &FlagsTy) {
FlagsTy = C.getIntTypeForBitwidth(C.getTypeSize(C.BoolTy), /*Signed=*/false);
if (KmpDependInfoTy.isNull()) {
  RecordDecl *KmpDependInfoRD = C.buildImplicitRecord("kmp_depend_info");
  KmpDependInfoRD->startDefinition();
  addFieldToRecordDecl(C, KmpDependInfoRD, C.getIntPtrType());
  addFieldToRecordDecl(C, KmpDependInfoRD, C.getSizeType());
  addFieldToRecordDecl(C, KmpDependInfoRD, FlagsTy);
  KmpDependInfoRD->completeDefinition();
  KmpDependInfoTy = C.getRecordType(KmpDependInfoRD);
}
4629}

4631std::pair<llvm::Value *, LValue>
4632CGOpenMPRuntime::getDepobjElements(CodeGenFunction &CGF, LValue DepobjLVal,
                                 SourceLocation Loc) {
ASTContext &C = CGM.getContext();
QualType FlagsTy;
getDependTypes(C, KmpDependInfoTy, FlagsTy);
RecordDecl *KmpDependInfoRD =
    cast<RecordDecl>(KmpDependInfoTy->getAsTagDecl());
LValue Base = CGF.EmitLoadOfPointerLValue(
    DepobjLVal.getAddress(CGF),
    C.getPointerType(C.VoidPtrTy).castAs<PointerType>());
QualType KmpDependInfoPtrTy = C.getPointerType(KmpDependInfoTy);
Address Addr = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
        Base.getAddress(CGF), CGF.ConvertTypeForMem(KmpDependInfoPtrTy));
Base = CGF.MakeAddrLValue(Addr, KmpDependInfoTy, Base.getBaseInfo(),
                          Base.getTBAAInfo());
llvm::Value *DepObjAddr = CGF.Builder.CreateGEP(
    Addr.getElementType(), Addr.getPointer(),
    llvm::ConstantInt::get(CGF.IntPtrTy, -1, /*isSigned=*/true));
LValue NumDepsBase = CGF.MakeAddrLValue(
    Address(DepObjAddr, Addr.getAlignment()), KmpDependInfoTy,
    Base.getBaseInfo(), Base.getTBAAInfo());
// NumDeps = deps[i].base_addr;
LValue BaseAddrLVal = CGF.EmitLValueForField(
    NumDepsBase, *std::next(KmpDependInfoRD->field_begin(), BaseAddr));
llvm::Value *NumDeps = CGF.EmitLoadOfScalar(BaseAddrLVal, Loc);
return std::make_pair(NumDeps, Base);
4658}

4660static void emitDependData(CodeGenFunction &CGF, QualType &KmpDependInfoTy,
                         llvm::PointerUnion<unsigned *, LValue *> Pos,
                         const OMPTaskDataTy::DependData &Data,
                         Address DependenciesArray) {
CodeGenModule &CGM = CGF.CGM;
ASTContext &C = CGM.getContext();
QualType FlagsTy;
getDependTypes(C, KmpDependInfoTy, FlagsTy);
RecordDecl *KmpDependInfoRD =
    cast<RecordDecl>(KmpDependInfoTy->getAsTagDecl());
llvm::Type *LLVMFlagsTy = CGF.ConvertTypeForMem(FlagsTy);

OMPIteratorGeneratorScope IteratorScope(
    CGF, cast_or_null<OMPIteratorExpr>(
             Data.IteratorExpr ? Data.IteratorExpr->IgnoreParenImpCasts()
                               : nullptr));
for (const Expr *E : Data.DepExprs) {
  llvm::Value *Addr;
  llvm::Value *Size;
  std::tie(Addr, Size) = getPointerAndSize(CGF, E);
  LValue Base;
  if (unsigned *P = Pos.dyn_cast<unsigned *>()) {
    Base = CGF.MakeAddrLValue(
        CGF.Builder.CreateConstGEP(DependenciesArray, *P), KmpDependInfoTy);
  } else {
    LValue &PosLVal = *Pos.get<LValue *>();
    llvm::Value *Idx = CGF.EmitLoadOfScalar(PosLVal, E->getExprLoc());
    Base = CGF.MakeAddrLValue(
        Address(CGF.Builder.CreateGEP(DependenciesArray.getElementType(),
                                      DependenciesArray.getPointer(), Idx),
                DependenciesArray.getAlignment()),
        KmpDependInfoTy);
  }
  // deps[i].base_addr = &<Dependencies[i].second>;
  LValue BaseAddrLVal = CGF.EmitLValueForField(
      Base, *std::next(KmpDependInfoRD->field_begin(), BaseAddr));
  CGF.EmitStoreOfScalar(CGF.Builder.CreatePtrToInt(Addr, CGF.IntPtrTy),
                        BaseAddrLVal);
  // deps[i].len = sizeof(<Dependencies[i].second>);
  LValue LenLVal = CGF.EmitLValueForField(
      Base, *std::next(KmpDependInfoRD->field_begin(), Len));
  CGF.EmitStoreOfScalar(Size, LenLVal);
  // deps[i].flags = <Dependencies[i].first>;
  RTLDependenceKindTy DepKind = translateDependencyKind(Data.DepKind);
  LValue FlagsLVal = CGF.EmitLValueForField(
      Base, *std::next(KmpDependInfoRD->field_begin(), Flags));
  CGF.EmitStoreOfScalar(llvm::ConstantInt::get(LLVMFlagsTy, DepKind),
                        FlagsLVal);
  if (unsigned *P = Pos.dyn_cast<unsigned *>()) {
    ++(*P);
  } else {
    LValue &PosLVal = *Pos.get<LValue *>();
    llvm::Value *Idx = CGF.EmitLoadOfScalar(PosLVal, E->getExprLoc());
    Idx = CGF.Builder.CreateNUWAdd(Idx,
                                   llvm::ConstantInt::get(Idx->getType(), 1));
    CGF.EmitStoreOfScalar(Idx, PosLVal);
  }
}
4718}

4720static SmallVector<llvm::Value *, 4>
4721emitDepobjElementsSizes(CodeGenFunction &CGF, QualType &KmpDependInfoTy,
                      const OMPTaskDataTy::DependData &Data) {
assert(Data.DepKind == OMPC_DEPEND_depobj &&((void)0)
       "Expected depobj dependecy kind.")((void)0);
SmallVector<llvm::Value *, 4> Sizes;
SmallVector<LValue, 4> SizeLVals;
ASTContext &C = CGF.getContext();
QualType FlagsTy;
getDependTypes(C, KmpDependInfoTy, FlagsTy);
RecordDecl *KmpDependInfoRD =
    cast<RecordDecl>(KmpDependInfoTy->getAsTagDecl());
QualType KmpDependInfoPtrTy = C.getPointerType(KmpDependInfoTy);
llvm::Type *KmpDependInfoPtrT = CGF.ConvertTypeForMem(KmpDependInfoPtrTy);
{
  OMPIteratorGeneratorScope IteratorScope(
      CGF, cast_or_null<OMPIteratorExpr>(
               Data.IteratorExpr ? Data.IteratorExpr->IgnoreParenImpCasts()
                                 : nullptr));
  for (const Expr *E : Data.DepExprs) {
    LValue DepobjLVal = CGF.EmitLValue(E->IgnoreParenImpCasts());
    LValue Base = CGF.EmitLoadOfPointerLValue(
        DepobjLVal.getAddress(CGF),
        C.getPointerType(C.VoidPtrTy).castAs<PointerType>());
    Address Addr = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
        Base.getAddress(CGF), KmpDependInfoPtrT);
    Base = CGF.MakeAddrLValue(Addr, KmpDependInfoTy, Base.getBaseInfo(),
                              Base.getTBAAInfo());
    llvm::Value *DepObjAddr = CGF.Builder.CreateGEP(
        Addr.getElementType(), Addr.getPointer(),
        llvm::ConstantInt::get(CGF.IntPtrTy, -1, /*isSigned=*/true));
    LValue NumDepsBase = CGF.MakeAddrLValue(
        Address(DepObjAddr, Addr.getAlignment()), KmpDependInfoTy,
        Base.getBaseInfo(), Base.getTBAAInfo());
    // NumDeps = deps[i].base_addr;
    LValue BaseAddrLVal = CGF.EmitLValueForField(
        NumDepsBase, *std::next(KmpDependInfoRD->field_begin(), BaseAddr));
    llvm::Value *NumDeps =
        CGF.EmitLoadOfScalar(BaseAddrLVal, E->getExprLoc());
    LValue NumLVal = CGF.MakeAddrLValue(
        CGF.CreateMemTemp(C.getUIntPtrType(), "depobj.size.addr"),
        C.getUIntPtrType());
    CGF.InitTempAlloca(NumLVal.getAddress(CGF),
                       llvm::ConstantInt::get(CGF.IntPtrTy, 0));
    llvm::Value *PrevVal = CGF.EmitLoadOfScalar(NumLVal, E->getExprLoc());
    llvm::Value *Add = CGF.Builder.CreateNUWAdd(PrevVal, NumDeps);
    CGF.EmitStoreOfScalar(Add, NumLVal);
    SizeLVals.push_back(NumLVal);
  }
}
for (unsigned I = 0, E = SizeLVals.size(); I < E; ++I) {
  llvm::Value *Size =
      CGF.EmitLoadOfScalar(SizeLVals[I], Data.DepExprs[I]->getExprLoc());
  Sizes.push_back(Size);
}
return Sizes;
4776}

4778static void emitDepobjElements(CodeGenFunction &CGF, QualType &KmpDependInfoTy,
                             LValue PosLVal,
                             const OMPTaskDataTy::DependData &Data,
                             Address DependenciesArray) {
assert(Data.DepKind == OMPC_DEPEND_depobj &&((void)0)
       "Expected depobj dependecy kind.")((void)0);
ASTContext &C = CGF.getContext();
QualType FlagsTy;
getDependTypes(C, KmpDependInfoTy, FlagsTy);
RecordDecl *KmpDependInfoRD =
    cast<RecordDecl>(KmpDependInfoTy->getAsTagDecl());
QualType KmpDependInfoPtrTy = C.getPointerType(KmpDependInfoTy);
llvm::Type *KmpDependInfoPtrT = CGF.ConvertTypeForMem(KmpDependInfoPtrTy);
llvm::Value *ElSize = CGF.getTypeSize(KmpDependInfoTy);
{
  OMPIteratorGeneratorScope IteratorScope(
      CGF, cast_or_null<OMPIteratorExpr>(
               Data.IteratorExpr ? Data.IteratorExpr->IgnoreParenImpCasts()
                                 : nullptr));
  for (unsigned I = 0, End = Data.DepExprs.size(); I < End; ++I) {
    const Expr *E = Data.DepExprs[I];
    LValue DepobjLVal = CGF.EmitLValue(E->IgnoreParenImpCasts());
    LValue Base = CGF.EmitLoadOfPointerLValue(
        DepobjLVal.getAddress(CGF),
        C.getPointerType(C.VoidPtrTy).castAs<PointerType>());
    Address Addr = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
        Base.getAddress(CGF), KmpDependInfoPtrT);
    Base = CGF.MakeAddrLValue(Addr, KmpDependInfoTy, Base.getBaseInfo(),
                              Base.getTBAAInfo());

    // Get number of elements in a single depobj.
    llvm::Value *DepObjAddr = CGF.Builder.CreateGEP(
        Addr.getElementType(), Addr.getPointer(),
        llvm::ConstantInt::get(CGF.IntPtrTy, -1, /*isSigned=*/true));
    LValue NumDepsBase = CGF.MakeAddrLValue(
        Address(DepObjAddr, Addr.getAlignment()), KmpDependInfoTy,
        Base.getBaseInfo(), Base.getTBAAInfo());
    // NumDeps = deps[i].base_addr;
    LValue BaseAddrLVal = CGF.EmitLValueForField(
        NumDepsBase, *std::next(KmpDependInfoRD->field_begin(), BaseAddr));
    llvm::Value *NumDeps =
        CGF.EmitLoadOfScalar(BaseAddrLVal, E->getExprLoc());

    // memcopy dependency data.
    llvm::Value *Size = CGF.Builder.CreateNUWMul(
        ElSize,
        CGF.Builder.CreateIntCast(NumDeps, CGF.SizeTy, /*isSigned=*/false));
    llvm::Value *Pos = CGF.EmitLoadOfScalar(PosLVal, E->getExprLoc());
    Address DepAddr =
        Address(CGF.Builder.CreateGEP(DependenciesArray.getElementType(),
                                      DependenciesArray.getPointer(), Pos),
                DependenciesArray.getAlignment());
    CGF.Builder.CreateMemCpy(DepAddr, Base.getAddress(CGF), Size);

    // Increase pos.
    // pos += size;
    llvm::Value *Add = CGF.Builder.CreateNUWAdd(Pos, NumDeps);
    CGF.EmitStoreOfScalar(Add, PosLVal);
  }
}
4838}

4840std::pair<llvm::Value *, Address> CGOpenMPRuntime::emitDependClause(
  CodeGenFunction &CGF, ArrayRef<OMPTaskDataTy::DependData> Dependencies,
  SourceLocation Loc) {
if (llvm::all_of(Dependencies, [](const OMPTaskDataTy::DependData &D) {
      return D.DepExprs.empty();
    }))
  return std::make_pair(nullptr, Address::invalid());
// Process list of dependencies.
ASTContext &C = CGM.getContext();
Address DependenciesArray = Address::invalid();
llvm::Value *NumOfElements = nullptr;
unsigned NumDependencies = std::accumulate(
    Dependencies.begin(), Dependencies.end(), 0,
    [](unsigned V, const OMPTaskDataTy::DependData &D) {
      return D.DepKind == OMPC_DEPEND_depobj
                 ? V
                 : (V + (D.IteratorExpr ? 0 : D.DepExprs.size()));
    });
QualType FlagsTy;
getDependTypes(C, KmpDependInfoTy, FlagsTy);
bool HasDepobjDeps = false;
bool HasRegularWithIterators = false;
llvm::Value *NumOfDepobjElements = llvm::ConstantInt::get(CGF.IntPtrTy, 0);
llvm::Value *NumOfRegularWithIterators =
    llvm::ConstantInt::get(CGF.IntPtrTy, 1);
// Calculate number of depobj dependecies and regular deps with the iterators.
for (const OMPTaskDataTy::DependData &D : Dependencies) {
  if (D.DepKind == OMPC_DEPEND_depobj) {
    SmallVector<llvm::Value *, 4> Sizes =
        emitDepobjElementsSizes(CGF, KmpDependInfoTy, D);
    for (llvm::Value *Size : Sizes) {
      NumOfDepobjElements =
          CGF.Builder.CreateNUWAdd(NumOfDepobjElements, Size);
    }
    HasDepobjDeps = true;
    continue;
  }
  // Include number of iterations, if any.
  if (const auto *IE = cast_or_null<OMPIteratorExpr>(D.IteratorExpr)) {
    for (unsigned I = 0, E = IE->numOfIterators(); I < E; ++I) {
      llvm::Value *Sz = CGF.EmitScalarExpr(IE->getHelper(I).Upper);
      Sz = CGF.Builder.CreateIntCast(Sz, CGF.IntPtrTy, /*isSigned=*/false);
      NumOfRegularWithIterators =
          CGF.Builder.CreateNUWMul(NumOfRegularWithIterators, Sz);
    }
    HasRegularWithIterators = true;
    continue;
  }
}

QualType KmpDependInfoArrayTy;
if (HasDepobjDeps || HasRegularWithIterators) {
  NumOfElements = llvm::ConstantInt::get(CGM.IntPtrTy, NumDependencies,
                                         /*isSigned=*/false);
  if (HasDepobjDeps) {
    NumOfElements =
        CGF.Builder.CreateNUWAdd(NumOfDepobjElements, NumOfElements);
  }
  if (HasRegularWithIterators) {
    NumOfElements =
        CGF.Builder.CreateNUWAdd(NumOfRegularWithIterators, NumOfElements);
  }
  OpaqueValueExpr OVE(Loc,
                      C.getIntTypeForBitwidth(/*DestWidth=*/64, /*Signed=*/0),
                      VK_PRValue);
  CodeGenFunction::OpaqueValueMapping OpaqueMap(CGF, &OVE,
                                                RValue::get(NumOfElements));
  KmpDependInfoArrayTy =
      C.getVariableArrayType(KmpDependInfoTy, &OVE, ArrayType::Normal,
                             /*IndexTypeQuals=*/0, SourceRange(Loc, Loc));
  // CGF.EmitVariablyModifiedType(KmpDependInfoArrayTy);
  // Properly emit variable-sized array.
  auto *PD = ImplicitParamDecl::Create(C, KmpDependInfoArrayTy,
                                       ImplicitParamDecl::Other);
  CGF.EmitVarDecl(*PD);
  DependenciesArray = CGF.GetAddrOfLocalVar(PD);
  NumOfElements = CGF.Builder.CreateIntCast(NumOfElements, CGF.Int32Ty,
                                            /*isSigned=*/false);
} else {
  KmpDependInfoArrayTy = C.getConstantArrayType(
      KmpDependInfoTy, llvm::APInt(/*numBits=*/64, NumDependencies), nullptr,
      ArrayType::Normal, /*IndexTypeQuals=*/0);
  DependenciesArray =
      CGF.CreateMemTemp(KmpDependInfoArrayTy, ".dep.arr.addr");
  DependenciesArray = CGF.Builder.CreateConstArrayGEP(DependenciesArray, 0);
  NumOfElements = llvm::ConstantInt::get(CGM.Int32Ty, NumDependencies,
                                         /*isSigned=*/false);
}
unsigned Pos = 0;
for (unsigned I = 0, End = Dependencies.size(); I < End; ++I) {
  if (Dependencies[I].DepKind == OMPC_DEPEND_depobj ||
      Dependencies[I].IteratorExpr)
    continue;
  emitDependData(CGF, KmpDependInfoTy, &Pos, Dependencies[I],
                 DependenciesArray);
}
// Copy regular dependecies with iterators.
LValue PosLVal = CGF.MakeAddrLValue(
    CGF.CreateMemTemp(C.getSizeType(), "dep.counter.addr"), C.getSizeType());
CGF.EmitStoreOfScalar(llvm::ConstantInt::get(CGF.SizeTy, Pos), PosLVal);
for (unsigned I = 0, End = Dependencies.size(); I < End; ++I) {
  if (Dependencies[I].DepKind == OMPC_DEPEND_depobj ||
      !Dependencies[I].IteratorExpr)
    continue;
  emitDependData(CGF, KmpDependInfoTy, &PosLVal, Dependencies[I],
                 DependenciesArray);
}
// Copy final depobj arrays without iterators.
if (HasDepobjDeps) {
  for (unsigned I = 0, End = Dependencies.size(); I < End; ++I) {
    if (Dependencies[I].DepKind != OMPC_DEPEND_depobj)
      continue;
    emitDepobjElements(CGF, KmpDependInfoTy, PosLVal, Dependencies[I],
                       DependenciesArray);
  }
}
DependenciesArray = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
    DependenciesArray, CGF.VoidPtrTy);
return std::make_pair(NumOfElements, DependenciesArray);
4959}

4961Address CGOpenMPRuntime::emitDepobjDependClause(
  CodeGenFunction &CGF, const OMPTaskDataTy::DependData &Dependencies,
  SourceLocation Loc) {
if (Dependencies.DepExprs.empty())
  return Address::invalid();
// Process list of dependencies.
ASTContext &C = CGM.getContext();
Address DependenciesArray = Address::invalid();
unsigned NumDependencies = Dependencies.DepExprs.size();
QualType FlagsTy;
getDependTypes(C, KmpDependInfoTy, FlagsTy);
RecordDecl *KmpDependInfoRD =
    cast<RecordDecl>(KmpDependInfoTy->getAsTagDecl());

llvm::Value *Size;
// Define type kmp_depend_info[<Dependencies.size()>];
// For depobj reserve one extra element to store the number of elements.
// It is required to handle depobj(x) update(in) construct.
// kmp_depend_info[<Dependencies.size()>] deps;
llvm::Value *NumDepsVal;
CharUnits Align = C.getTypeAlignInChars(KmpDependInfoTy);
if (const auto *IE =
        cast_or_null<OMPIteratorExpr>(Dependencies.IteratorExpr)) {
  NumDepsVal = llvm::ConstantInt::get(CGF.SizeTy, 1);
  for (unsigned I = 0, E = IE->numOfIterators(); I < E; ++I) {
    llvm::Value *Sz = CGF.EmitScalarExpr(IE->getHelper(I).Upper);
    Sz = CGF.Builder.CreateIntCast(Sz, CGF.SizeTy, /*isSigned=*/false);
    NumDepsVal = CGF.Builder.CreateNUWMul(NumDepsVal, Sz);
  }
  Size = CGF.Builder.CreateNUWAdd(llvm::ConstantInt::get(CGF.SizeTy, 1),
                                  NumDepsVal);
  CharUnits SizeInBytes =
      C.getTypeSizeInChars(KmpDependInfoTy).alignTo(Align);
  llvm::Value *RecSize = CGM.getSize(SizeInBytes);
  Size = CGF.Builder.CreateNUWMul(Size, RecSize);
  NumDepsVal =
      CGF.Builder.CreateIntCast(NumDepsVal, CGF.IntPtrTy, /*isSigned=*/false);
} else {
  QualType KmpDependInfoArrayTy = C.getConstantArrayType(
      KmpDependInfoTy, llvm::APInt(/*numBits=*/64, NumDependencies + 1),
      nullptr, ArrayType::Normal, /*IndexTypeQuals=*/0);
  CharUnits Sz = C.getTypeSizeInChars(KmpDependInfoArrayTy);
  Size = CGM.getSize(Sz.alignTo(Align));
  NumDepsVal = llvm::ConstantInt::get(CGF.IntPtrTy, NumDependencies);
}
// Need to allocate on the dynamic memory.
llvm::Value *ThreadID = getThreadID(CGF, Loc);
// Use default allocator.
llvm::Value *Allocator = llvm::ConstantPointerNull::get(CGF.VoidPtrTy);
llvm::Value *Args[] = {ThreadID, Size, Allocator};

llvm::Value *Addr =
    CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                            CGM.getModule(), OMPRTL___kmpc_alloc),
                        Args, ".dep.arr.addr");
Addr = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
    Addr, CGF.ConvertTypeForMem(KmpDependInfoTy)->getPointerTo());
DependenciesArray = Address(Addr, Align);
// Write number of elements in the first element of array for depobj.
LValue Base = CGF.MakeAddrLValue(DependenciesArray, KmpDependInfoTy);
// deps[i].base_addr = NumDependencies;
LValue BaseAddrLVal = CGF.EmitLValueForField(
    Base, *std::next(KmpDependInfoRD->field_begin(), BaseAddr));
CGF.EmitStoreOfScalar(NumDepsVal, BaseAddrLVal);
llvm::PointerUnion<unsigned *, LValue *> Pos;
unsigned Idx = 1;
LValue PosLVal;
if (Dependencies.IteratorExpr) {
  PosLVal = CGF.MakeAddrLValue(
      CGF.CreateMemTemp(C.getSizeType(), "iterator.counter.addr"),
      C.getSizeType());
  CGF.EmitStoreOfScalar(llvm::ConstantInt::get(CGF.SizeTy, Idx), PosLVal,
                        /*IsInit=*/true);
  Pos = &PosLVal;
} else {
  Pos = &Idx;
}
emitDependData(CGF, KmpDependInfoTy, Pos, Dependencies, DependenciesArray);
DependenciesArray = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
    CGF.Builder.CreateConstGEP(DependenciesArray, 1), CGF.VoidPtrTy);
return DependenciesArray;
5042}

5044void CGOpenMPRuntime::emitDestroyClause(CodeGenFunction &CGF, LValue DepobjLVal,
                                      SourceLocation Loc) {
ASTContext &C = CGM.getContext();
QualType FlagsTy;
getDependTypes(C, KmpDependInfoTy, FlagsTy);
LValue Base = CGF.EmitLoadOfPointerLValue(
    DepobjLVal.getAddress(CGF),
    C.getPointerType(C.VoidPtrTy).castAs<PointerType>());
QualType KmpDependInfoPtrTy = C.getPointerType(KmpDependInfoTy);
Address Addr = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
    Base.getAddress(CGF), CGF.ConvertTypeForMem(KmpDependInfoPtrTy));
llvm::Value *DepObjAddr = CGF.Builder.CreateGEP(
    Addr.getElementType(), Addr.getPointer(),
    llvm::ConstantInt::get(CGF.IntPtrTy, -1, /*isSigned=*/true));
DepObjAddr = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(DepObjAddr,
                                                             CGF.VoidPtrTy);
llvm::Value *ThreadID = getThreadID(CGF, Loc);
// Use default allocator.
llvm::Value *Allocator = llvm::ConstantPointerNull::get(CGF.VoidPtrTy);
llvm::Value *Args[] = {ThreadID, DepObjAddr, Allocator};

// _kmpc_free(gtid, addr, nullptr);
(void)CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                              CGM.getModule(), OMPRTL___kmpc_free),
                          Args);
5069}

5071void CGOpenMPRuntime::emitUpdateClause(CodeGenFunction &CGF, LValue DepobjLVal,
                                     OpenMPDependClauseKind NewDepKind,
                                     SourceLocation Loc) {
ASTContext &C = CGM.getContext();
QualType FlagsTy;
getDependTypes(C, KmpDependInfoTy, FlagsTy);
RecordDecl *KmpDependInfoRD =
    cast<RecordDecl>(KmpDependInfoTy->getAsTagDecl());
llvm::Type *LLVMFlagsTy = CGF.ConvertTypeForMem(FlagsTy);
llvm::Value *NumDeps;
LValue Base;
std::tie(NumDeps, Base) = getDepobjElements(CGF, DepobjLVal, Loc);

Address Begin = Base.getAddress(CGF);
// Cast from pointer to array type to pointer to single element.
llvm::Value *End = CGF.Builder.CreateGEP(
    Begin.getElementType(), Begin.getPointer(), NumDeps);
// The basic structure here is a while-do loop.
llvm::BasicBlock *BodyBB = CGF.createBasicBlock("omp.body");
llvm::BasicBlock *DoneBB = CGF.createBasicBlock("omp.done");
llvm::BasicBlock *EntryBB = CGF.Builder.GetInsertBlock();
CGF.EmitBlock(BodyBB);
llvm::PHINode *ElementPHI =
    CGF.Builder.CreatePHI(Begin.getType(), 2, "omp.elementPast");
ElementPHI->addIncoming(Begin.getPointer(), EntryBB);
Begin = Address(ElementPHI, Begin.getAlignment());
Base = CGF.MakeAddrLValue(Begin, KmpDependInfoTy, Base.getBaseInfo(),
                          Base.getTBAAInfo());
// deps[i].flags = NewDepKind;
RTLDependenceKindTy DepKind = translateDependencyKind(NewDepKind);
LValue FlagsLVal = CGF.EmitLValueForField(
    Base, *std::next(KmpDependInfoRD->field_begin(), Flags));
CGF.EmitStoreOfScalar(llvm::ConstantInt::get(LLVMFlagsTy, DepKind),
                      FlagsLVal);

// Shift the address forward by one element.
Address ElementNext =
    CGF.Builder.CreateConstGEP(Begin, /*Index=*/1, "omp.elementNext");
ElementPHI->addIncoming(ElementNext.getPointer(),
                        CGF.Builder.GetInsertBlock());
llvm::Value *IsEmpty =
    CGF.Builder.CreateICmpEQ(ElementNext.getPointer(), End, "omp.isempty");
CGF.Builder.CreateCondBr(IsEmpty, DoneBB, BodyBB);
// Done.
CGF.EmitBlock(DoneBB, /*IsFinished=*/true);
5116}

5118void CGOpenMPRuntime::emitTaskCall(CodeGenFunction &CGF, SourceLocation Loc,
                                 const OMPExecutableDirective &D,
                                 llvm::Function *TaskFunction,
                                 QualType SharedsTy, Address Shareds,
                                 const Expr *IfCond,
                                 const OMPTaskDataTy &Data) {
if (!CGF.HaveInsertPoint())
  return;

TaskResultTy Result =
    emitTaskInit(CGF, Loc, D, TaskFunction, SharedsTy, Shareds, Data);
llvm::Value *NewTask = Result.NewTask;
llvm::Function *TaskEntry = Result.TaskEntry;
llvm::Value *NewTaskNewTaskTTy = Result.NewTaskNewTaskTTy;
LValue TDBase = Result.TDBase;
const RecordDecl *KmpTaskTQTyRD = Result.KmpTaskTQTyRD;
// Process list of dependences.
Address DependenciesArray = Address::invalid();
llvm::Value *NumOfElements;
std::tie(NumOfElements, DependenciesArray) =
    emitDependClause(CGF, Data.Dependences, Loc);

// NOTE: routine and part_id fields are initialized by __kmpc_omp_task_alloc()
// libcall.
// Build kmp_int32 __kmpc_omp_task_with_deps(ident_t *, kmp_int32 gtid,
// kmp_task_t *new_task, kmp_int32 ndeps, kmp_depend_info_t *dep_list,
// kmp_int32 ndeps_noalias, kmp_depend_info_t *noalias_dep_list) if dependence
// list is not empty
llvm::Value *ThreadID = getThreadID(CGF, Loc);
llvm::Value *UpLoc = emitUpdateLocation(CGF, Loc);
llvm::Value *TaskArgs[] = { UpLoc, ThreadID, NewTask };
llvm::Value *DepTaskArgs[7];
if (!Data.Dependences.empty()) {
  DepTaskArgs[0] = UpLoc;
  DepTaskArgs[1] = ThreadID;
  DepTaskArgs[2] = NewTask;
  DepTaskArgs[3] = NumOfElements;
  DepTaskArgs[4] = DependenciesArray.getPointer();
  DepTaskArgs[5] = CGF.Builder.getInt32(0);
  DepTaskArgs[6] = llvm::ConstantPointerNull::get(CGF.VoidPtrTy);
}
auto &&ThenCodeGen = [this, &Data, TDBase, KmpTaskTQTyRD, &TaskArgs,
                      &DepTaskArgs](CodeGenFunction &CGF, PrePostActionTy &) {
  if (!Data.Tied) {
    auto PartIdFI = std::next(KmpTaskTQTyRD->field_begin(), KmpTaskTPartId);
    LValue PartIdLVal = CGF.EmitLValueForField(TDBase, *PartIdFI);
    CGF.EmitStoreOfScalar(CGF.Builder.getInt32(0), PartIdLVal);
  }
  if (!Data.Dependences.empty()) {
    CGF.EmitRuntimeCall(
        OMPBuilder.getOrCreateRuntimeFunction(
            CGM.getModule(), OMPRTL___kmpc_omp_task_with_deps),
        DepTaskArgs);
  } else {
    CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                            CGM.getModule(), OMPRTL___kmpc_omp_task),
                        TaskArgs);
  }
  // Check if parent region is untied and build return for untied task;
  if (auto *Region =
          dyn_cast_or_null<CGOpenMPRegionInfo>(CGF.CapturedStmtInfo))
    Region->emitUntiedSwitch(CGF);
};

llvm::Value *DepWaitTaskArgs[6];
if (!Data.Dependences.empty()) {
  DepWaitTaskArgs[0] = UpLoc;
  DepWaitTaskArgs[1] = ThreadID;
  DepWaitTaskArgs[2] = NumOfElements;
  DepWaitTaskArgs[3] = DependenciesArray.getPointer();
  DepWaitTaskArgs[4] = CGF.Builder.getInt32(0);
  DepWaitTaskArgs[5] = llvm::ConstantPointerNull::get(CGF.VoidPtrTy);
}
auto &M = CGM.getModule();
auto &&ElseCodeGen = [this, &M, &TaskArgs, ThreadID, NewTaskNewTaskTTy,
                      TaskEntry, &Data, &DepWaitTaskArgs,
                      Loc](CodeGenFunction &CGF, PrePostActionTy &) {
  CodeGenFunction::RunCleanupsScope LocalScope(CGF);
  // Build void __kmpc_omp_wait_deps(ident_t *, kmp_int32 gtid,
  // kmp_int32 ndeps, kmp_depend_info_t *dep_list, kmp_int32
  // ndeps_noalias, kmp_depend_info_t *noalias_dep_list); if dependence info
  // is specified.
  if (!Data.Dependences.empty())
    CGF.EmitRuntimeCall(
        OMPBuilder.getOrCreateRuntimeFunction(M, OMPRTL___kmpc_omp_wait_deps),
        DepWaitTaskArgs);
  // Call proxy_task_entry(gtid, new_task);
  auto &&CodeGen = [TaskEntry, ThreadID, NewTaskNewTaskTTy,
                    Loc](CodeGenFunction &CGF, PrePostActionTy &Action) {
    Action.Enter(CGF);
    llvm::Value *OutlinedFnArgs[] = {ThreadID, NewTaskNewTaskTTy};
    CGF.CGM.getOpenMPRuntime().emitOutlinedFunctionCall(CGF, Loc, TaskEntry,
                                                        OutlinedFnArgs);
  };

  // Build void __kmpc_omp_task_begin_if0(ident_t *, kmp_int32 gtid,
  // kmp_task_t *new_task);
  // Build void __kmpc_omp_task_complete_if0(ident_t *, kmp_int32 gtid,
  // kmp_task_t *new_task);
  RegionCodeGenTy RCG(CodeGen);
  CommonActionTy Action(OMPBuilder.getOrCreateRuntimeFunction(
                            M, OMPRTL___kmpc_omp_task_begin_if0),
                        TaskArgs,
                        OMPBuilder.getOrCreateRuntimeFunction(
                            M, OMPRTL___kmpc_omp_task_complete_if0),
                        TaskArgs);
  RCG.setAction(Action);
  RCG(CGF);
};

if (IfCond) {
  emitIfClause(CGF, IfCond, ThenCodeGen, ElseCodeGen);
} else {
  RegionCodeGenTy ThenRCG(ThenCodeGen);
  ThenRCG(CGF);
}
5234}

5236void CGOpenMPRuntime::emitTaskLoopCall(CodeGenFunction &CGF, SourceLocation Loc,
                                     const OMPLoopDirective &D,
                                     llvm::Function *TaskFunction,
                                     QualType SharedsTy, Address Shareds,
                                     const Expr *IfCond,
                                     const OMPTaskDataTy &Data) {
if (!CGF.HaveInsertPoint())
  return;
TaskResultTy Result =
    emitTaskInit(CGF, Loc, D, TaskFunction, SharedsTy, Shareds, Data);
// NOTE: routine and part_id fields are initialized by __kmpc_omp_task_alloc()
// libcall.
// Call to void __kmpc_taskloop(ident_t *loc, int gtid, kmp_task_t *task, int
// if_val, kmp_uint64 *lb, kmp_uint64 *ub, kmp_int64 st, int nogroup, int
// sched, kmp_uint64 grainsize, void *task_dup);
llvm::Value *ThreadID = getThreadID(CGF, Loc);
llvm::Value *UpLoc = emitUpdateLocation(CGF, Loc);
llvm::Value *IfVal;
if (IfCond) {
  IfVal = CGF.Builder.CreateIntCast(CGF.EvaluateExprAsBool(IfCond), CGF.IntTy,
                                    /*isSigned=*/true);
} else {
  IfVal = llvm::ConstantInt::getSigned(CGF.IntTy, /*V=*/1);
}

LValue LBLVal = CGF.EmitLValueForField(
    Result.TDBase,
    *std::next(Result.KmpTaskTQTyRD->field_begin(), KmpTaskTLowerBound));
const auto *LBVar =
    cast<VarDecl>(cast<DeclRefExpr>(D.getLowerBoundVariable())->getDecl());
CGF.EmitAnyExprToMem(LBVar->getInit(), LBLVal.getAddress(CGF),
                     LBLVal.getQuals(),
                     /*IsInitializer=*/true);
LValue UBLVal = CGF.EmitLValueForField(
    Result.TDBase,
    *std::next(Result.KmpTaskTQTyRD->field_begin(), KmpTaskTUpperBound));
const auto *UBVar =
    cast<VarDecl>(cast<DeclRefExpr>(D.getUpperBoundVariable())->getDecl());
CGF.EmitAnyExprToMem(UBVar->getInit(), UBLVal.getAddress(CGF),
                     UBLVal.getQuals(),
                     /*IsInitializer=*/true);
LValue StLVal = CGF.EmitLValueForField(
    Result.TDBase,
    *std::next(Result.KmpTaskTQTyRD->field_begin(), KmpTaskTStride));
const auto *StVar =
    cast<VarDecl>(cast<DeclRefExpr>(D.getStrideVariable())->getDecl());
CGF.EmitAnyExprToMem(StVar->getInit(), StLVal.getAddress(CGF),
                     StLVal.getQuals(),
                     /*IsInitializer=*/true);
// Store reductions address.
LValue RedLVal = CGF.EmitLValueForField(
    Result.TDBase,
    *std::next(Result.KmpTaskTQTyRD->field_begin(), KmpTaskTReductions));
if (Data.Reductions) {
  CGF.EmitStoreOfScalar(Data.Reductions, RedLVal);
} else {
  CGF.EmitNullInitialization(RedLVal.getAddress(CGF),
                             CGF.getContext().VoidPtrTy);
}
enum { NoSchedule = 0, Grainsize = 1, NumTasks = 2 };
llvm::Value *TaskArgs[] = {
    UpLoc,
    ThreadID,
    Result.NewTask,
    IfVal,
    LBLVal.getPointer(CGF),
    UBLVal.getPointer(CGF),
    CGF.EmitLoadOfScalar(StLVal, Loc),
    llvm::ConstantInt::getSigned(
        CGF.IntTy, 1), // Always 1 because taskgroup emitted by the compiler
    llvm::ConstantInt::getSigned(
        CGF.IntTy, Data.Schedule.getPointer()
                       ? Data.Schedule.getInt() ? NumTasks : Grainsize
                       : NoSchedule),
    Data.Schedule.getPointer()
        ? CGF.Builder.CreateIntCast(Data.Schedule.getPointer(), CGF.Int64Ty,
                                    /*isSigned=*/false)
        : llvm::ConstantInt::get(CGF.Int64Ty, /*V=*/0),
    Result.TaskDupFn ? CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
                           Result.TaskDupFn, CGF.VoidPtrTy)
                     : llvm::ConstantPointerNull::get(CGF.VoidPtrTy)};
CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                        CGM.getModule(), OMPRTL___kmpc_taskloop),
                    TaskArgs);
5320}

5322/// Emit reduction operation for each element of array (required for
5323/// array sections) LHS op = RHS.
5324/// \param Type Type of array.
5325/// \param LHSVar Variable on the left side of the reduction operation
5326/// (references element of array in original variable).
5327/// \param RHSVar Variable on the right side of the reduction operation
5328/// (references element of array in original variable).
5329/// \param RedOpGen Generator of reduction operation with use of LHSVar and
5330/// RHSVar.
5331static void EmitOMPAggregateReduction(
  CodeGenFunction &CGF, QualType Type, const VarDecl *LHSVar,
  const VarDecl *RHSVar,
  const llvm::function_ref<void(CodeGenFunction &CGF, const Expr *,
                                const Expr *, const Expr *)> &RedOpGen,
  const Expr *XExpr = nullptr, const Expr *EExpr = nullptr,
  const Expr *UpExpr = nullptr) {
// Perform element-by-element initialization.
QualType ElementTy;
Address LHSAddr = CGF.GetAddrOfLocalVar(LHSVar);
Address RHSAddr = CGF.GetAddrOfLocalVar(RHSVar);

// Drill down to the base element type on both arrays.
const ArrayType *ArrayTy = Type->getAsArrayTypeUnsafe();
llvm::Value *NumElements = CGF.emitArrayLength(ArrayTy, ElementTy, LHSAddr);

llvm::Value *RHSBegin = RHSAddr.getPointer();
llvm::Value *LHSBegin = LHSAddr.getPointer();
// Cast from pointer to array type to pointer to single element.
llvm::Value *LHSEnd =
    CGF.Builder.CreateGEP(LHSAddr.getElementType(), LHSBegin, NumElements);
// The basic structure here is a while-do loop.
llvm::BasicBlock *BodyBB = CGF.createBasicBlock("omp.arraycpy.body");
llvm::BasicBlock *DoneBB = CGF.createBasicBlock("omp.arraycpy.done");
llvm::Value *IsEmpty =
    CGF.Builder.CreateICmpEQ(LHSBegin, LHSEnd, "omp.arraycpy.isempty");
CGF.Builder.CreateCondBr(IsEmpty, DoneBB, BodyBB);

// Enter the loop body, making that address the current address.
llvm::BasicBlock *EntryBB = CGF.Builder.GetInsertBlock();
CGF.EmitBlock(BodyBB);

CharUnits ElementSize = CGF.getContext().getTypeSizeInChars(ElementTy);

llvm::PHINode *RHSElementPHI = CGF.Builder.CreatePHI(
    RHSBegin->getType(), 2, "omp.arraycpy.srcElementPast");
RHSElementPHI->addIncoming(RHSBegin, EntryBB);
Address RHSElementCurrent =
    Address(RHSElementPHI,
            RHSAddr.getAlignment().alignmentOfArrayElement(ElementSize));

llvm::PHINode *LHSElementPHI = CGF.Builder.CreatePHI(
    LHSBegin->getType(), 2, "omp.arraycpy.destElementPast");
LHSElementPHI->addIncoming(LHSBegin, EntryBB);
Address LHSElementCurrent =
    Address(LHSElementPHI,
            LHSAddr.getAlignment().alignmentOfArrayElement(ElementSize));

// Emit copy.
CodeGenFunction::OMPPrivateScope Scope(CGF);
Scope.addPrivate(LHSVar, [=]() { return LHSElementCurrent; });
Scope.addPrivate(RHSVar, [=]() { return RHSElementCurrent; });
Scope.Privatize();
RedOpGen(CGF, XExpr, EExpr, UpExpr);
Scope.ForceCleanup();

// Shift the address forward by one element.
llvm::Value *LHSElementNext = CGF.Builder.CreateConstGEP1_32(
    LHSAddr.getElementType(), LHSElementPHI, /*Idx0=*/1,
    "omp.arraycpy.dest.element");
llvm::Value *RHSElementNext = CGF.Builder.CreateConstGEP1_32(
    RHSAddr.getElementType(), RHSElementPHI, /*Idx0=*/1,
    "omp.arraycpy.src.element");
// Check whether we've reached the end.
llvm::Value *Done =
    CGF.Builder.CreateICmpEQ(LHSElementNext, LHSEnd, "omp.arraycpy.done");
CGF.Builder.CreateCondBr(Done, DoneBB, BodyBB);
LHSElementPHI->addIncoming(LHSElementNext, CGF.Builder.GetInsertBlock());
RHSElementPHI->addIncoming(RHSElementNext, CGF.Builder.GetInsertBlock());

// Done.
CGF.EmitBlock(DoneBB, /*IsFinished=*/true);
5403}

5405/// Emit reduction combiner. If the combiner is a simple expression emit it as
5406/// is, otherwise consider it as combiner of UDR decl and emit it as a call of
5407/// UDR combiner function.
5408static void emitReductionCombiner(CodeGenFunction &CGF,
                                const Expr *ReductionOp) {
if (const auto *CE = dyn_cast<CallExpr>(ReductionOp))
  if (const auto *OVE = dyn_cast<OpaqueValueExpr>(CE->getCallee()))
    if (const auto *DRE =
            dyn_cast<DeclRefExpr>(OVE->getSourceExpr()->IgnoreImpCasts()))
      if (const auto *DRD =
              dyn_cast<OMPDeclareReductionDecl>(DRE->getDecl())) {
        std::pair<llvm::Function *, llvm::Function *> Reduction =
            CGF.CGM.getOpenMPRuntime().getUserDefinedReduction(DRD);
        RValue Func = RValue::get(Reduction.first);
        CodeGenFunction::OpaqueValueMapping Map(CGF, OVE, Func);
        CGF.EmitIgnoredExpr(ReductionOp);
        return;
      }
CGF.EmitIgnoredExpr(ReductionOp);
5424}

5426llvm::Function *CGOpenMPRuntime::emitReductionFunction(
  SourceLocation Loc, llvm::Type *ArgsType, ArrayRef<const Expr *> Privates,
  ArrayRef<const Expr *> LHSExprs, ArrayRef<const Expr *> RHSExprs,
  ArrayRef<const Expr *> ReductionOps) {
ASTContext &C = CGM.getContext();

// void reduction_func(void *LHSArg, void *RHSArg);
FunctionArgList Args;
ImplicitParamDecl LHSArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, C.VoidPtrTy,
                         ImplicitParamDecl::Other);
ImplicitParamDecl RHSArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, C.VoidPtrTy,
                         ImplicitParamDecl::Other);
Args.push_back(&LHSArg);
Args.push_back(&RHSArg);
const auto &CGFI =
    CGM.getTypes().arrangeBuiltinFunctionDeclaration(C.VoidTy, Args);
std::string Name = getName({"omp", "reduction", "reduction_func"});
auto *Fn = llvm::Function::Create(CGM.getTypes().GetFunctionType(CGFI),
                                  llvm::GlobalValue::InternalLinkage, Name,
                                  &CGM.getModule());
CGM.SetInternalFunctionAttributes(GlobalDecl(), Fn, CGFI);
Fn->setDoesNotRecurse();
CodeGenFunction CGF(CGM);
CGF.StartFunction(GlobalDecl(), C.VoidTy, Fn, CGFI, Args, Loc, Loc);

// Dst = (void*[n])(LHSArg);
// Src = (void*[n])(RHSArg);
Address LHS(CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
    CGF.Builder.CreateLoad(CGF.GetAddrOfLocalVar(&LHSArg)),
    ArgsType), CGF.getPointerAlign());
Address RHS(CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
    CGF.Builder.CreateLoad(CGF.GetAddrOfLocalVar(&RHSArg)),
    ArgsType), CGF.getPointerAlign());

//  ...
//  *(Type<i>*)lhs[i] = RedOp<i>(*(Type<i>*)lhs[i], *(Type<i>*)rhs[i]);
//  ...
CodeGenFunction::OMPPrivateScope Scope(CGF);
auto IPriv = Privates.begin();
unsigned Idx = 0;
for (unsigned I = 0, E = ReductionOps.size(); I < E; ++I, ++IPriv, ++Idx) {
  const auto *RHSVar =
      cast<VarDecl>(cast<DeclRefExpr>(RHSExprs[I])->getDecl());
  Scope.addPrivate(RHSVar, [&CGF, RHS, Idx, RHSVar]() {
    return emitAddrOfVarFromArray(CGF, RHS, Idx, RHSVar);
  });
  const auto *LHSVar =
      cast<VarDecl>(cast<DeclRefExpr>(LHSExprs[I])->getDecl());
  Scope.addPrivate(LHSVar, [&CGF, LHS, Idx, LHSVar]() {
    return emitAddrOfVarFromArray(CGF, LHS, Idx, LHSVar);
  });
  QualType PrivTy = (*IPriv)->getType();
  if (PrivTy->isVariablyModifiedType()) {
    // Get array size and emit VLA type.
    ++Idx;
    Address Elem = CGF.Builder.CreateConstArrayGEP(LHS, Idx);
    llvm::Value *Ptr = CGF.Builder.CreateLoad(Elem);
    const VariableArrayType *VLA =
        CGF.getContext().getAsVariableArrayType(PrivTy);
    const auto *OVE = cast<OpaqueValueExpr>(VLA->getSizeExpr());
    CodeGenFunction::OpaqueValueMapping OpaqueMap(
        CGF, OVE, RValue::get(CGF.Builder.CreatePtrToInt(Ptr, CGF.SizeTy)));
    CGF.EmitVariablyModifiedType(PrivTy);
  }
}
Scope.Privatize();
IPriv = Privates.begin();
auto ILHS = LHSExprs.begin();
auto IRHS = RHSExprs.begin();
for (const Expr *E : ReductionOps) {
  if ((*IPriv)->getType()->isArrayType()) {
    // Emit reduction for array section.
    const auto *LHSVar = cast<VarDecl>(cast<DeclRefExpr>(*ILHS)->getDecl());
    const auto *RHSVar = cast<VarDecl>(cast<DeclRefExpr>(*IRHS)->getDecl());
    EmitOMPAggregateReduction(
        CGF, (*IPriv)->getType(), LHSVar, RHSVar,
        [=](CodeGenFunction &CGF, const Expr *, const Expr *, const Expr *) {
          emitReductionCombiner(CGF, E);
        });
  } else {
    // Emit reduction for array subscript or single variable.
    emitReductionCombiner(CGF, E);
  }
  ++IPriv;
  ++ILHS;
  ++IRHS;
}
Scope.ForceCleanup();
CGF.FinishFunction();
return Fn;
5516}

5518void CGOpenMPRuntime::emitSingleReductionCombiner(CodeGenFunction &CGF,
                                                const Expr *ReductionOp,
                                                const Expr *PrivateRef,
                                                const DeclRefExpr *LHS,
                                                const DeclRefExpr *RHS) {
if (PrivateRef->getType()->isArrayType()) {
  // Emit reduction for array section.
  const auto *LHSVar = cast<VarDecl>(LHS->getDecl());
  const auto *RHSVar = cast<VarDecl>(RHS->getDecl());
  EmitOMPAggregateReduction(
      CGF, PrivateRef->getType(), LHSVar, RHSVar,
      [=](CodeGenFunction &CGF, const Expr *, const Expr *, const Expr *) {
        emitReductionCombiner(CGF, ReductionOp);
      });
} else {
  // Emit reduction for array subscript or single variable.
  emitReductionCombiner(CGF, ReductionOp);
}
5536}

5538void CGOpenMPRuntime::emitReduction(CodeGenFunction &CGF, SourceLocation Loc,
                                  ArrayRef<const Expr *> Privates,
                                  ArrayRef<const Expr *> LHSExprs,
                                  ArrayRef<const Expr *> RHSExprs,
                                  ArrayRef<const Expr *> ReductionOps,
                                  ReductionOptionsTy Options) {
if (!CGF.HaveInsertPoint())
  return;

bool WithNowait = Options.WithNowait;
bool SimpleReduction = Options.SimpleReduction;

// Next code should be emitted for reduction:
//
// static kmp_critical_name lock = { 0 };
//
// void reduce_func(void *lhs[<n>], void *rhs[<n>]) {
//  *(Type0*)lhs[0] = ReductionOperation0(*(Type0*)lhs[0], *(Type0*)rhs[0]);
//  ...
//  *(Type<n>-1*)lhs[<n>-1] = ReductionOperation<n>-1(*(Type<n>-1*)lhs[<n>-1],
//  *(Type<n>-1*)rhs[<n>-1]);
// }
//
// ...
// void *RedList[<n>] = {&<RHSExprs>[0], ..., &<RHSExprs>[<n>-1]};
// switch (__kmpc_reduce{_nowait}(<loc>, <gtid>, <n>, sizeof(RedList),
// RedList, reduce_func, &<lock>)) {
// case 1:
//  ...
//  <LHSExprs>[i] = RedOp<i>(*<LHSExprs>[i], *<RHSExprs>[i]);
//  ...
// __kmpc_end_reduce{_nowait}(<loc>, <gtid>, &<lock>);
// break;
// case 2:
//  ...
//  Atomic(<LHSExprs>[i] = RedOp<i>(*<LHSExprs>[i], *<RHSExprs>[i]));
//  ...
// [__kmpc_end_reduce(<loc>, <gtid>, &<lock>);]
// break;
// default:;
// }
//
// if SimpleReduction is true, only the next code is generated:
//  ...
//  <LHSExprs>[i] = RedOp<i>(*<LHSExprs>[i], *<RHSExprs>[i]);
//  ...

ASTContext &C = CGM.getContext();

if (SimpleReduction) {
  CodeGenFunction::RunCleanupsScope Scope(CGF);
  auto IPriv = Privates.begin();
  auto ILHS = LHSExprs.begin();
  auto IRHS = RHSExprs.begin();
  for (const Expr *E : ReductionOps) {
    emitSingleReductionCombiner(CGF, E, *IPriv, cast<DeclRefExpr>(*ILHS),
                                cast<DeclRefExpr>(*IRHS));
    ++IPriv;
    ++ILHS;
    ++IRHS;
  }
  return;
}

// 1. Build a list of reduction variables.
// void *RedList[<n>] = {<ReductionVars>[0], ..., <ReductionVars>[<n>-1]};
auto Size = RHSExprs.size();
for (const Expr *E : Privates) {
  if (E->getType()->isVariablyModifiedType())
    // Reserve place for array size.
    ++Size;
}
llvm::APInt ArraySize(/*unsigned int numBits=*/32, Size);
QualType ReductionArrayTy =
    C.getConstantArrayType(C.VoidPtrTy, ArraySize, nullptr, ArrayType::Normal,
                           /*IndexTypeQuals=*/0);
Address ReductionList =
    CGF.CreateMemTemp(ReductionArrayTy, ".omp.reduction.red_list");
auto IPriv = Privates.begin();
unsigned Idx = 0;
for (unsigned I = 0, E = RHSExprs.size(); I < E; ++I, ++IPriv, ++Idx) {
  Address Elem = CGF.Builder.CreateConstArrayGEP(ReductionList, Idx);
  CGF.Builder.CreateStore(
      CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
          CGF.EmitLValue(RHSExprs[I]).getPointer(CGF), CGF.VoidPtrTy),
      Elem);
  if ((*IPriv)->getType()->isVariablyModifiedType()) {
    // Store array size.
    ++Idx;
    Elem = CGF.Builder.CreateConstArrayGEP(ReductionList, Idx);
    llvm::Value *Size = CGF.Builder.CreateIntCast(
        CGF.getVLASize(
               CGF.getContext().getAsVariableArrayType((*IPriv)->getType()))
            .NumElts,
        CGF.SizeTy, /*isSigned=*/false);
    CGF.Builder.CreateStore(CGF.Builder.CreateIntToPtr(Size, CGF.VoidPtrTy),
                            Elem);
  }
}

// 2. Emit reduce_func().
llvm::Function *ReductionFn = emitReductionFunction(
    Loc, CGF.ConvertTypeForMem(ReductionArrayTy)->getPointerTo(), Privates,
    LHSExprs, RHSExprs, ReductionOps);

// 3. Create static kmp_critical_name lock = { 0 };
std::string Name = getName({"reduction"});
llvm::Value *Lock = getCriticalRegionLock(Name);

// 4. Build res = __kmpc_reduce{_nowait}(<loc>, <gtid>, <n>, sizeof(RedList),
// RedList, reduce_func, &<lock>);
llvm::Value *IdentTLoc = emitUpdateLocation(CGF, Loc, OMP_ATOMIC_REDUCE);
llvm::Value *ThreadId = getThreadID(CGF, Loc);
llvm::Value *ReductionArrayTySize = CGF.getTypeSize(ReductionArrayTy);
llvm::Value *RL = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
    ReductionList.getPointer(), CGF.VoidPtrTy);
llvm::Value *Args[] = {
    IdentTLoc,                             // ident_t *<loc>
    ThreadId,                              // i32 <gtid>
    CGF.Builder.getInt32(RHSExprs.size()), // i32 <n>
    ReductionArrayTySize,                  // size_type sizeof(RedList)
    RL,                                    // void *RedList
    ReductionFn, // void (*) (void *, void *) <reduce_func>
    Lock         // kmp_critical_name *&<lock>
};
llvm::Value *Res = CGF.EmitRuntimeCall(
    OMPBuilder.getOrCreateRuntimeFunction(
        CGM.getModule(),
        WithNowait ? OMPRTL___kmpc_reduce_nowait : OMPRTL___kmpc_reduce),
    Args);

// 5. Build switch(res)
llvm::BasicBlock *DefaultBB = CGF.createBasicBlock(".omp.reduction.default");
llvm::SwitchInst *SwInst =
    CGF.Builder.CreateSwitch(Res, DefaultBB, /*NumCases=*/2);

// 6. Build case 1:
//  ...
//  <LHSExprs>[i] = RedOp<i>(*<LHSExprs>[i], *<RHSExprs>[i]);
//  ...
// __kmpc_end_reduce{_nowait}(<loc>, <gtid>, &<lock>);
// break;
llvm::BasicBlock *Case1BB = CGF.createBasicBlock(".omp.reduction.case1");
SwInst->addCase(CGF.Builder.getInt32(1), Case1BB);
CGF.EmitBlock(Case1BB);

// Add emission of __kmpc_end_reduce{_nowait}(<loc>, <gtid>, &<lock>);
llvm::Value *EndArgs[] = {
    IdentTLoc, // ident_t *<loc>
    ThreadId,  // i32 <gtid>
    Lock       // kmp_critical_name *&<lock>
};
auto &&CodeGen = [Privates, LHSExprs, RHSExprs, ReductionOps](
                     CodeGenFunction &CGF, PrePostActionTy &Action) {
  CGOpenMPRuntime &RT = CGF.CGM.getOpenMPRuntime();
  auto IPriv = Privates.begin();
  auto ILHS = LHSExprs.begin();
  auto IRHS = RHSExprs.begin();
  for (const Expr *E : ReductionOps) {
    RT.emitSingleReductionCombiner(CGF, E, *IPriv, cast<DeclRefExpr>(*ILHS),
                                   cast<DeclRefExpr>(*IRHS));
    ++IPriv;
    ++ILHS;
    ++IRHS;
  }
};
RegionCodeGenTy RCG(CodeGen);
CommonActionTy Action(
    nullptr, llvm::None,
    OMPBuilder.getOrCreateRuntimeFunction(
        CGM.getModule(), WithNowait ? OMPRTL___kmpc_end_reduce_nowait
                                    : OMPRTL___kmpc_end_reduce),
    EndArgs);
RCG.setAction(Action);
RCG(CGF);

CGF.EmitBranch(DefaultBB);

// 7. Build case 2:
//  ...
//  Atomic(<LHSExprs>[i] = RedOp<i>(*<LHSExprs>[i], *<RHSExprs>[i]));
//  ...
// break;
llvm::BasicBlock *Case2BB = CGF.createBasicBlock(".omp.reduction.case2");
SwInst->addCase(CGF.Builder.getInt32(2), Case2BB);
CGF.EmitBlock(Case2BB);

auto &&AtomicCodeGen = [Loc, Privates, LHSExprs, RHSExprs, ReductionOps](
                           CodeGenFunction &CGF, PrePostActionTy &Action) {
  auto ILHS = LHSExprs.begin();
  auto IRHS = RHSExprs.begin();
  auto IPriv = Privates.begin();
  for (const Expr *E : ReductionOps) {
    const Expr *XExpr = nullptr;
    const Expr *EExpr = nullptr;
    const Expr *UpExpr = nullptr;
    BinaryOperatorKind BO = BO_Comma;
    if (const auto *BO = dyn_cast<BinaryOperator>(E)) {
      if (BO->getOpcode() == BO_Assign) {
        XExpr = BO->getLHS();
        UpExpr = BO->getRHS();
      }
    }
    // Try to emit update expression as a simple atomic.
    const Expr *RHSExpr = UpExpr;
    if (RHSExpr) {
      // Analyze RHS part of the whole expression.
      if (const auto *ACO = dyn_cast<AbstractConditionalOperator>(
              RHSExpr->IgnoreParenImpCasts())) {
        // If this is a conditional operator, analyze its condition for
        // min/max reduction operator.
        RHSExpr = ACO->getCond();
      }
      if (const auto *BORHS =
              dyn_cast<BinaryOperator>(RHSExpr->IgnoreParenImpCasts())) {
        EExpr = BORHS->getRHS();
        BO = BORHS->getOpcode();
      }
    }
    if (XExpr) {
      const auto *VD = cast<VarDecl>(cast<DeclRefExpr>(*ILHS)->getDecl());
      auto &&AtomicRedGen = [BO, VD,
                             Loc](CodeGenFunction &CGF, const Expr *XExpr,
                                  const Expr *EExpr, const Expr *UpExpr) {
        LValue X = CGF.EmitLValue(XExpr);
        RValue E;
        if (EExpr)
          E = CGF.EmitAnyExpr(EExpr);
        CGF.EmitOMPAtomicSimpleUpdateExpr(
            X, E, BO, /*IsXLHSInRHSPart=*/true,
            llvm::AtomicOrdering::Monotonic, Loc,
            [&CGF, UpExpr, VD, Loc](RValue XRValue) {
              CodeGenFunction::OMPPrivateScope PrivateScope(CGF);
              PrivateScope.addPrivate(
                  VD, [&CGF, VD, XRValue, Loc]() {
                    Address LHSTemp = CGF.CreateMemTemp(VD->getType());
                    CGF.emitOMPSimpleStore(
                        CGF.MakeAddrLValue(LHSTemp, VD->getType()), XRValue,
                        VD->getType().getNonReferenceType(), Loc);
                    return LHSTemp;
                  });
              (void)PrivateScope.Privatize();
              return CGF.EmitAnyExpr(UpExpr);
            });
      };
      if ((*IPriv)->getType()->isArrayType()) {
        // Emit atomic reduction for array section.
        const auto *RHSVar =
            cast<VarDecl>(cast<DeclRefExpr>(*IRHS)->getDecl());
        EmitOMPAggregateReduction(CGF, (*IPriv)->getType(), VD, RHSVar,
                                  AtomicRedGen, XExpr, EExpr, UpExpr);
      } else {
        // Emit atomic reduction for array subscript or single variable.
        AtomicRedGen(CGF, XExpr, EExpr, UpExpr);
      }
    } else {
      // Emit as a critical region.
      auto &&CritRedGen = [E, Loc](CodeGenFunction &CGF, const Expr *,
                                         const Expr *, const Expr *) {
        CGOpenMPRuntime &RT = CGF.CGM.getOpenMPRuntime();
        std::string Name = RT.getName({"atomic_reduction"});
        RT.emitCriticalRegion(
            CGF, Name,
            [=](CodeGenFunction &CGF, PrePostActionTy &Action) {
              Action.Enter(CGF);
              emitReductionCombiner(CGF, E);
            },
            Loc);
      };
      if ((*IPriv)->getType()->isArrayType()) {
        const auto *LHSVar =
            cast<VarDecl>(cast<DeclRefExpr>(*ILHS)->getDecl());
        const auto *RHSVar =
            cast<VarDecl>(cast<DeclRefExpr>(*IRHS)->getDecl());
        EmitOMPAggregateReduction(CGF, (*IPriv)->getType(), LHSVar, RHSVar,
                                  CritRedGen);
      } else {
        CritRedGen(CGF, nullptr, nullptr, nullptr);
      }
    }
    ++ILHS;
    ++IRHS;
    ++IPriv;
  }
};
RegionCodeGenTy AtomicRCG(AtomicCodeGen);
if (!WithNowait) {
  // Add emission of __kmpc_end_reduce(<loc>, <gtid>, &<lock>);
  llvm::Value *EndArgs[] = {
      IdentTLoc, // ident_t *<loc>
      ThreadId,  // i32 <gtid>
      Lock       // kmp_critical_name *&<lock>
  };
  CommonActionTy Action(nullptr, llvm::None,
                        OMPBuilder.getOrCreateRuntimeFunction(
                            CGM.getModule(), OMPRTL___kmpc_end_reduce),
                        EndArgs);
  AtomicRCG.setAction(Action);
  AtomicRCG(CGF);
} else {
  AtomicRCG(CGF);
}

CGF.EmitBranch(DefaultBB);
CGF.EmitBlock(DefaultBB, /*IsFinished=*/true);
5843}

5845/// Generates unique name for artificial threadprivate variables.
5846/// Format is: <Prefix> "." <Decl_mangled_name> "_" "<Decl_start_loc_raw_enc>"
5847static std::string generateUniqueName(CodeGenModule &CGM, StringRef Prefix,
                                    const Expr *Ref) {
SmallString<256> Buffer;
llvm::raw_svector_ostream Out(Buffer);
const clang::DeclRefExpr *DE;
const VarDecl *D = ::getBaseDecl(Ref, DE);
if (!D)
  D = cast<VarDecl>(cast<DeclRefExpr>(Ref)->getDecl());
D = D->getCanonicalDecl();
std::string Name = CGM.getOpenMPRuntime().getName(
    {D->isLocalVarDeclOrParm() ? D->getName() : CGM.getMangledName(D)});
Out << Prefix << Name << "_"
    << D->getCanonicalDecl()->getBeginLoc().getRawEncoding();
return std::string(Out.str());
5861}

5863/// Emits reduction initializer function:
5864/// \code
5865/// void @.red_init(void* %arg, void* %orig) {
5866/// %0 = bitcast void* %arg to <type>*
5867/// store <type> <init>, <type>* %0
5868/// ret void
5869/// }
5870/// \endcode
5871static llvm::Value *emitReduceInitFunction(CodeGenModule &CGM,
                                         SourceLocation Loc,
                                         ReductionCodeGen &RCG, unsigned N) {
ASTContext &C = CGM.getContext();
QualType VoidPtrTy = C.VoidPtrTy;
VoidPtrTy.addRestrict();
FunctionArgList Args;
ImplicitParamDecl Param(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, VoidPtrTy,
                        ImplicitParamDecl::Other);
ImplicitParamDecl ParamOrig(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, VoidPtrTy,
                            ImplicitParamDecl::Other);
Args.emplace_back(&Param);
Args.emplace_back(&ParamOrig);
const auto &FnInfo =
    CGM.getTypes().arrangeBuiltinFunctionDeclaration(C.VoidTy, Args);
llvm::FunctionType *FnTy = CGM.getTypes().GetFunctionType(FnInfo);
std::string Name = CGM.getOpenMPRuntime().getName({"red_init", ""});
auto *Fn = llvm::Function::Create(FnTy, llvm::GlobalValue::InternalLinkage,
                                  Name, &CGM.getModule());
CGM.SetInternalFunctionAttributes(GlobalDecl(), Fn, FnInfo);
Fn->setDoesNotRecurse();
CodeGenFunction CGF(CGM);
CGF.StartFunction(GlobalDecl(), C.VoidTy, Fn, FnInfo, Args, Loc, Loc);
Address PrivateAddr = CGF.EmitLoadOfPointer(
    CGF.GetAddrOfLocalVar(&Param),
    C.getPointerType(C.VoidPtrTy).castAs<PointerType>());
llvm::Value *Size = nullptr;
// If the size of the reduction item is non-constant, load it from global
// threadprivate variable.
if (RCG.getSizes(N).second) {
  Address SizeAddr = CGM.getOpenMPRuntime().getAddrOfArtificialThreadPrivate(
      CGF, CGM.getContext().getSizeType(),
      generateUniqueName(CGM, "reduction_size", RCG.getRefExpr(N)));
  Size = CGF.EmitLoadOfScalar(SizeAddr, /*Volatile=*/false,
                              CGM.getContext().getSizeType(), Loc);
}
RCG.emitAggregateType(CGF, N, Size);
LValue OrigLVal;
// If initializer uses initializer from declare reduction construct, emit a
// pointer to the address of the original reduction item (reuired by reduction
// initializer)
if (RCG.usesReductionInitializer(N)) {
  Address SharedAddr = CGF.GetAddrOfLocalVar(&ParamOrig);
  SharedAddr = CGF.EmitLoadOfPointer(
      SharedAddr,
      CGM.getContext().VoidPtrTy.castAs<PointerType>()->getTypePtr());
  OrigLVal = CGF.MakeAddrLValue(SharedAddr, CGM.getContext().VoidPtrTy);
} else {
  OrigLVal = CGF.MakeNaturalAlignAddrLValue(
      llvm::ConstantPointerNull::get(CGM.VoidPtrTy),
      CGM.getContext().VoidPtrTy);
}
// Emit the initializer:
// %0 = bitcast void* %arg to <type>*
// store <type> <init>, <type>* %0
RCG.emitInitialization(CGF, N, PrivateAddr, OrigLVal,
                       [](CodeGenFunction &) { return false; });
CGF.FinishFunction();
return Fn;
5930}

5932/// Emits reduction combiner function:
5933/// \code
5934/// void @.red_comb(void* %arg0, void* %arg1) {
5935/// %lhs = bitcast void* %arg0 to <type>*
5936/// %rhs = bitcast void* %arg1 to <type>*
5937/// %2 = <ReductionOp>(<type>* %lhs, <type>* %rhs)
5938/// store <type> %2, <type>* %lhs
5939/// ret void
5940/// }
5941/// \endcode
5942static llvm::Value *emitReduceCombFunction(CodeGenModule &CGM,
                                         SourceLocation Loc,
                                         ReductionCodeGen &RCG, unsigned N,
                                         const Expr *ReductionOp,
                                         const Expr *LHS, const Expr *RHS,
                                         const Expr *PrivateRef) {
ASTContext &C = CGM.getContext();
const auto *LHSVD = cast<VarDecl>(cast<DeclRefExpr>(LHS)->getDecl());
const auto *RHSVD = cast<VarDecl>(cast<DeclRefExpr>(RHS)->getDecl());
FunctionArgList Args;
ImplicitParamDecl ParamInOut(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr,
                             C.VoidPtrTy, ImplicitParamDecl::Other);
ImplicitParamDecl ParamIn(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, C.VoidPtrTy,
                          ImplicitParamDecl::Other);
Args.emplace_back(&ParamInOut);
Args.emplace_back(&ParamIn);
const auto &FnInfo =
    CGM.getTypes().arrangeBuiltinFunctionDeclaration(C.VoidTy, Args);
llvm::FunctionType *FnTy = CGM.getTypes().GetFunctionType(FnInfo);
std::string Name = CGM.getOpenMPRuntime().getName({"red_comb", ""});
auto *Fn = llvm::Function::Create(FnTy, llvm::GlobalValue::InternalLinkage,
                                  Name, &CGM.getModule());
CGM.SetInternalFunctionAttributes(GlobalDecl(), Fn, FnInfo);
Fn->setDoesNotRecurse();
CodeGenFunction CGF(CGM);
CGF.StartFunction(GlobalDecl(), C.VoidTy, Fn, FnInfo, Args, Loc, Loc);
llvm::Value *Size = nullptr;
// If the size of the reduction item is non-constant, load it from global
// threadprivate variable.
if (RCG.getSizes(N).second) {
  Address SizeAddr = CGM.getOpenMPRuntime().getAddrOfArtificialThreadPrivate(
      CGF, CGM.getContext().getSizeType(),
      generateUniqueName(CGM, "reduction_size", RCG.getRefExpr(N)));
  Size = CGF.EmitLoadOfScalar(SizeAddr, /*Volatile=*/false,
                              CGM.getContext().getSizeType(), Loc);
}
RCG.emitAggregateType(CGF, N, Size);
// Remap lhs and rhs variables to the addresses of the function arguments.
// %lhs = bitcast void* %arg0 to <type>*
// %rhs = bitcast void* %arg1 to <type>*
CodeGenFunction::OMPPrivateScope PrivateScope(CGF);
PrivateScope.addPrivate(LHSVD, [&C, &CGF, &ParamInOut, LHSVD]() {
  // Pull out the pointer to the variable.
  Address PtrAddr = CGF.EmitLoadOfPointer(
      CGF.GetAddrOfLocalVar(&ParamInOut),
      C.getPointerType(C.VoidPtrTy).castAs<PointerType>());
  return CGF.Builder.CreateElementBitCast(
      PtrAddr, CGF.ConvertTypeForMem(LHSVD->getType()));
});
PrivateScope.addPrivate(RHSVD, [&C, &CGF, &ParamIn, RHSVD]() {
  // Pull out the pointer to the variable.
  Address PtrAddr = CGF.EmitLoadOfPointer(
      CGF.GetAddrOfLocalVar(&ParamIn),
      C.getPointerType(C.VoidPtrTy).castAs<PointerType>());
  return CGF.Builder.CreateElementBitCast(
      PtrAddr, CGF.ConvertTypeForMem(RHSVD->getType()));
});
PrivateScope.Privatize();
// Emit the combiner body:
// %2 = <ReductionOp>(<type> *%lhs, <type> *%rhs)
// store <type> %2, <type>* %lhs
CGM.getOpenMPRuntime().emitSingleReductionCombiner(
    CGF, ReductionOp, PrivateRef, cast<DeclRefExpr>(LHS),
    cast<DeclRefExpr>(RHS));
CGF.FinishFunction();
return Fn;
6008}

6010/// Emits reduction finalizer function:
6011/// \code
6012/// void @.red_fini(void* %arg) {
6013/// %0 = bitcast void* %arg to <type>*
6014/// <destroy>(<type>* %0)
6015/// ret void
6016/// }
6017/// \endcode
6018static llvm::Value *emitReduceFiniFunction(CodeGenModule &CGM,
                                         SourceLocation Loc,
                                         ReductionCodeGen &RCG, unsigned N) {
if (!RCG.needCleanups(N))
  return nullptr;
ASTContext &C = CGM.getContext();
FunctionArgList Args;
ImplicitParamDecl Param(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, C.VoidPtrTy,
                        ImplicitParamDecl::Other);
Args.emplace_back(&Param);
const auto &FnInfo =
    CGM.getTypes().arrangeBuiltinFunctionDeclaration(C.VoidTy, Args);
llvm::FunctionType *FnTy = CGM.getTypes().GetFunctionType(FnInfo);
std::string Name = CGM.getOpenMPRuntime().getName({"red_fini", ""});
auto *Fn = llvm::Function::Create(FnTy, llvm::GlobalValue::InternalLinkage,
                                  Name, &CGM.getModule());
CGM.SetInternalFunctionAttributes(GlobalDecl(), Fn, FnInfo);
Fn->setDoesNotRecurse();
CodeGenFunction CGF(CGM);
CGF.StartFunction(GlobalDecl(), C.VoidTy, Fn, FnInfo, Args, Loc, Loc);
Address PrivateAddr = CGF.EmitLoadOfPointer(
    CGF.GetAddrOfLocalVar(&Param),
    C.getPointerType(C.VoidPtrTy).castAs<PointerType>());
llvm::Value *Size = nullptr;
// If the size of the reduction item is non-constant, load it from global
// threadprivate variable.
if (RCG.getSizes(N).second) {
  Address SizeAddr = CGM.getOpenMPRuntime().getAddrOfArtificialThreadPrivate(
      CGF, CGM.getContext().getSizeType(),
      generateUniqueName(CGM, "reduction_size", RCG.getRefExpr(N)));
  Size = CGF.EmitLoadOfScalar(SizeAddr, /*Volatile=*/false,
                              CGM.getContext().getSizeType(), Loc);
}
RCG.emitAggregateType(CGF, N, Size);
// Emit the finalizer body:
// <destroy>(<type>* %0)
RCG.emitCleanups(CGF, N, PrivateAddr);
CGF.FinishFunction(Loc);
return Fn;
6057}

6059llvm::Value *CGOpenMPRuntime::emitTaskReductionInit(
  CodeGenFunction &CGF, SourceLocation Loc, ArrayRef<const Expr *> LHSExprs,
  ArrayRef<const Expr *> RHSExprs, const OMPTaskDataTy &Data) {
if (!CGF.HaveInsertPoint() || Data.ReductionVars.empty())
  return nullptr;

// Build typedef struct:
// kmp_taskred_input {
//   void *reduce_shar; // shared reduction item
//   void *reduce_orig; // original reduction item used for initialization
//   size_t reduce_size; // size of data item
//   void *reduce_init; // data initialization routine
//   void *reduce_fini; // data finalization routine
//   void *reduce_comb; // data combiner routine
//   kmp_task_red_flags_t flags; // flags for additional info from compiler
// } kmp_taskred_input_t;
ASTContext &C = CGM.getContext();
RecordDecl *RD = C.buildImplicitRecord("kmp_taskred_input_t");
RD->startDefinition();
const FieldDecl *SharedFD = addFieldToRecordDecl(C, RD, C.VoidPtrTy);
const FieldDecl *OrigFD = addFieldToRecordDecl(C, RD, C.VoidPtrTy);
const FieldDecl *SizeFD = addFieldToRecordDecl(C, RD, C.getSizeType());
const FieldDecl *InitFD  = addFieldToRecordDecl(C, RD, C.VoidPtrTy);
const FieldDecl *FiniFD = addFieldToRecordDecl(C, RD, C.VoidPtrTy);
const FieldDecl *CombFD = addFieldToRecordDecl(C, RD, C.VoidPtrTy);
const FieldDecl *FlagsFD = addFieldToRecordDecl(
    C, RD, C.getIntTypeForBitwidth(/*DestWidth=*/32, /*Signed=*/false));
RD->completeDefinition();
QualType RDType = C.getRecordType(RD);
unsigned Size = Data.ReductionVars.size();
llvm::APInt ArraySize(/*numBits=*/64, Size);
QualType ArrayRDType = C.getConstantArrayType(
    RDType, ArraySize, nullptr, ArrayType::Normal, /*IndexTypeQuals=*/0);
// kmp_task_red_input_t .rd_input.[Size];
Address TaskRedInput = CGF.CreateMemTemp(ArrayRDType, ".rd_input.");
ReductionCodeGen RCG(Data.ReductionVars, Data.ReductionOrigs,
                     Data.ReductionCopies, Data.ReductionOps);
for (unsigned Cnt = 0; Cnt < Size; ++Cnt) {
  // kmp_task_red_input_t &ElemLVal = .rd_input.[Cnt];
  llvm::Value *Idxs[] = {llvm::ConstantInt::get(CGM.SizeTy, /*V=*/0),
                         llvm::ConstantInt::get(CGM.SizeTy, Cnt)};
  llvm::Value *GEP = CGF.EmitCheckedInBoundsGEP(
      TaskRedInput.getPointer(), Idxs,
      /*SignedIndices=*/false, /*IsSubtraction=*/false, Loc,
      ".rd_input.gep.");
  LValue ElemLVal = CGF.MakeNaturalAlignAddrLValue(GEP, RDType);
  // ElemLVal.reduce_shar = &Shareds[Cnt];
  LValue SharedLVal = CGF.EmitLValueForField(ElemLVal, SharedFD);
  RCG.emitSharedOrigLValue(CGF, Cnt);
  llvm::Value *CastedShared =
      CGF.EmitCastToVoidPtr(RCG.getSharedLValue(Cnt).getPointer(CGF));
  CGF.EmitStoreOfScalar(CastedShared, SharedLVal);
  // ElemLVal.reduce_orig = &Origs[Cnt];
  LValue OrigLVal = CGF.EmitLValueForField(ElemLVal, OrigFD);
  llvm::Value *CastedOrig =
      CGF.EmitCastToVoidPtr(RCG.getOrigLValue(Cnt).getPointer(CGF));
  CGF.EmitStoreOfScalar(CastedOrig, OrigLVal);
  RCG.emitAggregateType(CGF, Cnt);
  llvm::Value *SizeValInChars;
  llvm::Value *SizeVal;
  std::tie(SizeValInChars, SizeVal) = RCG.getSizes(Cnt);
  // We use delayed creation/initialization for VLAs and array sections. It is
  // required because runtime does not provide the way to pass the sizes of
  // VLAs/array sections to initializer/combiner/finalizer functions. Instead
  // threadprivate global variables are used to store these values and use
  // them in the functions.
  bool DelayedCreation = !!SizeVal;
  SizeValInChars = CGF.Builder.CreateIntCast(SizeValInChars, CGM.SizeTy,
                                             /*isSigned=*/false);
  LValue SizeLVal = CGF.EmitLValueForField(ElemLVal, SizeFD);
  CGF.EmitStoreOfScalar(SizeValInChars, SizeLVal);
  // ElemLVal.reduce_init = init;
  LValue InitLVal = CGF.EmitLValueForField(ElemLVal, InitFD);
  llvm::Value *InitAddr =
      CGF.EmitCastToVoidPtr(emitReduceInitFunction(CGM, Loc, RCG, Cnt));
  CGF.EmitStoreOfScalar(InitAddr, InitLVal);
  // ElemLVal.reduce_fini = fini;
  LValue FiniLVal = CGF.EmitLValueForField(ElemLVal, FiniFD);
  llvm::Value *Fini = emitReduceFiniFunction(CGM, Loc, RCG, Cnt);
  llvm::Value *FiniAddr = Fini
                              ? CGF.EmitCastToVoidPtr(Fini)
                              : llvm::ConstantPointerNull::get(CGM.VoidPtrTy);
  CGF.EmitStoreOfScalar(FiniAddr, FiniLVal);
  // ElemLVal.reduce_comb = comb;
  LValue CombLVal = CGF.EmitLValueForField(ElemLVal, CombFD);
  llvm::Value *CombAddr = CGF.EmitCastToVoidPtr(emitReduceCombFunction(
      CGM, Loc, RCG, Cnt, Data.ReductionOps[Cnt], LHSExprs[Cnt],
      RHSExprs[Cnt], Data.ReductionCopies[Cnt]));
  CGF.EmitStoreOfScalar(CombAddr, CombLVal);
  // ElemLVal.flags = 0;
  LValue FlagsLVal = CGF.EmitLValueForField(ElemLVal, FlagsFD);
  if (DelayedCreation) {
    CGF.EmitStoreOfScalar(
        llvm::ConstantInt::get(CGM.Int32Ty, /*V=*/1, /*isSigned=*/true),
        FlagsLVal);
  } else
    CGF.EmitNullInitialization(FlagsLVal.getAddress(CGF),
                               FlagsLVal.getType());
}
if (Data.IsReductionWithTaskMod) {
  // Build call void *__kmpc_taskred_modifier_init(ident_t *loc, int gtid, int
  // is_ws, int num, void *data);
  llvm::Value *IdentTLoc = emitUpdateLocation(CGF, Loc);
  llvm::Value *GTid = CGF.Builder.CreateIntCast(getThreadID(CGF, Loc),
                                                CGM.IntTy, /*isSigned=*/true);
  llvm::Value *Args[] = {
      IdentTLoc, GTid,
      llvm::ConstantInt::get(CGM.IntTy, Data.IsWorksharingReduction ? 1 : 0,
                             /*isSigned=*/true),
      llvm::ConstantInt::get(CGM.IntTy, Size, /*isSigned=*/true),
      CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
          TaskRedInput.getPointer(), CGM.VoidPtrTy)};
  return CGF.EmitRuntimeCall(
      OMPBuilder.getOrCreateRuntimeFunction(
          CGM.getModule(), OMPRTL___kmpc_taskred_modifier_init),
      Args);
}
// Build call void *__kmpc_taskred_init(int gtid, int num_data, void *data);
llvm::Value *Args[] = {
    CGF.Builder.CreateIntCast(getThreadID(CGF, Loc), CGM.IntTy,
                              /*isSigned=*/true),
    llvm::ConstantInt::get(CGM.IntTy, Size, /*isSigned=*/true),
    CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(TaskRedInput.getPointer(),
                                                    CGM.VoidPtrTy)};
return CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                               CGM.getModule(), OMPRTL___kmpc_taskred_init),
                           Args);
6186}

6188void CGOpenMPRuntime::emitTaskReductionFini(CodeGenFunction &CGF,
                                          SourceLocation Loc,
                                          bool IsWorksharingReduction) {
// Build call void *__kmpc_taskred_modifier_init(ident_t *loc, int gtid, int
// is_ws, int num, void *data);
llvm::Value *IdentTLoc = emitUpdateLocation(CGF, Loc);
llvm::Value *GTid = CGF.Builder.CreateIntCast(getThreadID(CGF, Loc),
                                              CGM.IntTy, /*isSigned=*/true);
llvm::Value *Args[] = {IdentTLoc, GTid,
                       llvm::ConstantInt::get(CGM.IntTy,
                                              IsWorksharingReduction ? 1 : 0,
                                              /*isSigned=*/true)};
(void)CGF.EmitRuntimeCall(
    OMPBuilder.getOrCreateRuntimeFunction(
        CGM.getModule(), OMPRTL___kmpc_task_reduction_modifier_fini),
    Args);
6204}

6206void CGOpenMPRuntime::emitTaskReductionFixups(CodeGenFunction &CGF,
                                            SourceLocation Loc,
                                            ReductionCodeGen &RCG,
                                            unsigned N) {
auto Sizes = RCG.getSizes(N);
// Emit threadprivate global variable if the type is non-constant
// (Sizes.second = nullptr).
if (Sizes.second) {
  llvm::Value *SizeVal = CGF.Builder.CreateIntCast(Sizes.second, CGM.SizeTy,
                                                   /*isSigned=*/false);
  Address SizeAddr = getAddrOfArtificialThreadPrivate(
      CGF, CGM.getContext().getSizeType(),
      generateUniqueName(CGM, "reduction_size", RCG.getRefExpr(N)));
  CGF.Builder.CreateStore(SizeVal, SizeAddr, /*IsVolatile=*/false);
}
6221}

6223Address CGOpenMPRuntime::getTaskReductionItem(CodeGenFunction &CGF,
                                            SourceLocation Loc,
                                            llvm::Value *ReductionsPtr,
                                            LValue SharedLVal) {
// Build call void *__kmpc_task_reduction_get_th_data(int gtid, void *tg, void
// *d);
llvm::Value *Args[] = {CGF.Builder.CreateIntCast(getThreadID(CGF, Loc),
                                                 CGM.IntTy,
                                                 /*isSigned=*/true),
                       ReductionsPtr,
                       CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
                           SharedLVal.getPointer(CGF), CGM.VoidPtrTy)};
return Address(
    CGF.EmitRuntimeCall(
        OMPBuilder.getOrCreateRuntimeFunction(
            CGM.getModule(), OMPRTL___kmpc_task_reduction_get_th_data),
        Args),
    SharedLVal.getAlignment());
6241}

6243void CGOpenMPRuntime::emitTaskwaitCall(CodeGenFunction &CGF,
                                     SourceLocation Loc) {
if (!CGF.HaveInsertPoint())
  return;

if (CGF.CGM.getLangOpts().OpenMPIRBuilder) {
  OMPBuilder.createTaskwait(CGF.Builder);
} else {
  // Build call kmp_int32 __kmpc_omp_taskwait(ident_t *loc, kmp_int32
  // global_tid);
  llvm::Value *Args[] = {emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc)};
  // Ignore return result until untied tasks are supported.
  CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                          CGM.getModule(), OMPRTL___kmpc_omp_taskwait),
                      Args);
}

if (auto *Region = dyn_cast_or_null<CGOpenMPRegionInfo>(CGF.CapturedStmtInfo))
  Region->emitUntiedSwitch(CGF);
6262}

6264void CGOpenMPRuntime::emitInlinedDirective(CodeGenFunction &CGF,
                                         OpenMPDirectiveKind InnerKind,
                                         const RegionCodeGenTy &CodeGen,
                                         bool HasCancel) {
if (!CGF.HaveInsertPoint())
  return;
InlinedOpenMPRegionRAII Region(CGF, CodeGen, InnerKind, HasCancel,
                               InnerKind != OMPD_critical &&
                                   InnerKind != OMPD_master &&
                                   InnerKind != OMPD_masked);
CGF.CapturedStmtInfo->EmitBody(CGF, /*S=*/nullptr);
6275}

6277namespace {
6278enum RTCancelKind {
CancelNoreq = 0,
CancelParallel = 1,
CancelLoop = 2,
CancelSections = 3,
CancelTaskgroup = 4
6284};
6285} // anonymous namespace

6287static RTCancelKind getCancellationKind(OpenMPDirectiveKind CancelRegion) {
RTCancelKind CancelKind = CancelNoreq;
if (CancelRegion == OMPD_parallel)
  CancelKind = CancelParallel;
else if (CancelRegion == OMPD_for)
  CancelKind = CancelLoop;
else if (CancelRegion == OMPD_sections)
  CancelKind = CancelSections;
else {
  assert(CancelRegion == OMPD_taskgroup)((void)0);
  CancelKind = CancelTaskgroup;
}
return CancelKind;
6300}

6302void CGOpenMPRuntime::emitCancellationPointCall(
  CodeGenFunction &CGF, SourceLocation Loc,
  OpenMPDirectiveKind CancelRegion) {
if (!CGF.HaveInsertPoint())
  return;
// Build call kmp_int32 __kmpc_cancellationpoint(ident_t *loc, kmp_int32
// global_tid, kmp_int32 cncl_kind);
if (auto *OMPRegionInfo =
        dyn_cast_or_null<CGOpenMPRegionInfo>(CGF.CapturedStmtInfo)) {
  // For 'cancellation point taskgroup', the task region info may not have a
  // cancel. This may instead happen in another adjacent task.
  if (CancelRegion == OMPD_taskgroup || OMPRegionInfo->hasCancel()) {
    llvm::Value *Args[] = {
        emitUpdateLocation(CGF, Loc), getThreadID(CGF, Loc),
        CGF.Builder.getInt32(getCancellationKind(CancelRegion))};
    // Ignore return result until untied tasks are supported.
    llvm::Value *Result = CGF.EmitRuntimeCall(
        OMPBuilder.getOrCreateRuntimeFunction(
            CGM.getModule(), OMPRTL___kmpc_cancellationpoint),
        Args);
    // if (__kmpc_cancellationpoint()) {
    //   call i32 @__kmpc_cancel_barrier( // for parallel cancellation only
    //   exit from construct;
    // }
    llvm::BasicBlock *ExitBB = CGF.createBasicBlock(".cancel.exit");
    llvm::BasicBlock *ContBB = CGF.createBasicBlock(".cancel.continue");
    llvm::Value *Cmp = CGF.Builder.CreateIsNotNull(Result);
    CGF.Builder.CreateCondBr(Cmp, ExitBB, ContBB);
    CGF.EmitBlock(ExitBB);
    if (CancelRegion == OMPD_parallel)
      emitBarrierCall(CGF, Loc, OMPD_unknown, /*EmitChecks=*/false);
    // exit from construct;
    CodeGenFunction::JumpDest CancelDest =
        CGF.getOMPCancelDestination(OMPRegionInfo->getDirectiveKind());
    CGF.EmitBranchThroughCleanup(CancelDest);
    CGF.EmitBlock(ContBB, /*IsFinished=*/true);
  }
}
6340}

6342void CGOpenMPRuntime::emitCancelCall(CodeGenFunction &CGF, SourceLocation Loc,
                                   const Expr *IfCond,
                                   OpenMPDirectiveKind CancelRegion) {
if (!CGF.HaveInsertPoint())
  return;
// Build call kmp_int32 __kmpc_cancel(ident_t *loc, kmp_int32 global_tid,
// kmp_int32 cncl_kind);
auto &M = CGM.getModule();
if (auto *OMPRegionInfo =
        dyn_cast_or_null<CGOpenMPRegionInfo>(CGF.CapturedStmtInfo)) {
  auto &&ThenGen = [this, &M, Loc, CancelRegion,
                    OMPRegionInfo](CodeGenFunction &CGF, PrePostActionTy &) {
    CGOpenMPRuntime &RT = CGF.CGM.getOpenMPRuntime();
    llvm::Value *Args[] = {
        RT.emitUpdateLocation(CGF, Loc), RT.getThreadID(CGF, Loc),
        CGF.Builder.getInt32(getCancellationKind(CancelRegion))};
    // Ignore return result until untied tasks are supported.
    llvm::Value *Result = CGF.EmitRuntimeCall(
        OMPBuilder.getOrCreateRuntimeFunction(M, OMPRTL___kmpc_cancel), Args);
    // if (__kmpc_cancel()) {
    //   call i32 @__kmpc_cancel_barrier( // for parallel cancellation only
    //   exit from construct;
    // }
    llvm::BasicBlock *ExitBB = CGF.createBasicBlock(".cancel.exit");
    llvm::BasicBlock *ContBB = CGF.createBasicBlock(".cancel.continue");
    llvm::Value *Cmp = CGF.Builder.CreateIsNotNull(Result);
    CGF.Builder.CreateCondBr(Cmp, ExitBB, ContBB);
    CGF.EmitBlock(ExitBB);
    if (CancelRegion == OMPD_parallel)
      RT.emitBarrierCall(CGF, Loc, OMPD_unknown, /*EmitChecks=*/false);
    // exit from construct;
    CodeGenFunction::JumpDest CancelDest =
        CGF.getOMPCancelDestination(OMPRegionInfo->getDirectiveKind());
    CGF.EmitBranchThroughCleanup(CancelDest);
    CGF.EmitBlock(ContBB, /*IsFinished=*/true);
  };
  if (IfCond) {
    emitIfClause(CGF, IfCond, ThenGen,
                 [](CodeGenFunction &, PrePostActionTy &) {});
  } else {
    RegionCodeGenTy ThenRCG(ThenGen);
    ThenRCG(CGF);
  }
}
6386}

6388namespace {
6389/// Cleanup action for uses_allocators support.
6390class OMPUsesAllocatorsActionTy final : public PrePostActionTy {
ArrayRef<std::pair<const Expr *, const Expr *>> Allocators;

6393public:
OMPUsesAllocatorsActionTy(
    ArrayRef<std::pair<const Expr *, const Expr *>> Allocators)
    : Allocators(Allocators) {}
void Enter(CodeGenFunction &CGF) override {
  if (!CGF.HaveInsertPoint())
    return;
  for (const auto &AllocatorData : Allocators) {
    CGF.CGM.getOpenMPRuntime().emitUsesAllocatorsInit(
        CGF, AllocatorData.first, AllocatorData.second);
  }
}
void Exit(CodeGenFunction &CGF) override {
  if (!CGF.HaveInsertPoint())
    return;
  for (const auto &AllocatorData : Allocators) {
    CGF.CGM.getOpenMPRuntime().emitUsesAllocatorsFini(CGF,
                                                      AllocatorData.first);
  }
}
6413};
6414} // namespace

6416void CGOpenMPRuntime::emitTargetOutlinedFunction(
  const OMPExecutableDirective &D, StringRef ParentName,
  llvm::Function *&OutlinedFn, llvm::Constant *&OutlinedFnID,
  bool IsOffloadEntry, const RegionCodeGenTy &CodeGen) {
assert(!ParentName.empty() && "Invalid target region parent name!")((void)0);
HasEmittedTargetRegion = true;
SmallVector<std::pair<const Expr *, const Expr *>, 4> Allocators;
for (const auto *C : D.getClausesOfKind<OMPUsesAllocatorsClause>()) {
  for (unsigned I = 0, E = C->getNumberOfAllocators(); I < E; ++I) {
    const OMPUsesAllocatorsClause::Data D = C->getAllocatorData(I);
    if (!D.AllocatorTraits)
      continue;
    Allocators.emplace_back(D.Allocator, D.AllocatorTraits);
  }
}
OMPUsesAllocatorsActionTy UsesAllocatorAction(Allocators);
CodeGen.setAction(UsesAllocatorAction);
emitTargetOutlinedFunctionHelper(D, ParentName, OutlinedFn, OutlinedFnID,
                                 IsOffloadEntry, CodeGen);
6435}

6437void CGOpenMPRuntime::emitUsesAllocatorsInit(CodeGenFunction &CGF,
                                           const Expr *Allocator,
                                           const Expr *AllocatorTraits) {
llvm::Value *ThreadId = getThreadID(CGF, Allocator->getExprLoc());
ThreadId = CGF.Builder.CreateIntCast(ThreadId, CGF.IntTy, /*isSigned=*/true);
// Use default memspace handle.
llvm::Value *MemSpaceHandle = llvm::ConstantPointerNull::get(CGF.VoidPtrTy);
llvm::Value *NumTraits = llvm::ConstantInt::get(
    CGF.IntTy, cast<ConstantArrayType>(
                   AllocatorTraits->getType()->getAsArrayTypeUnsafe())
                   ->getSize()
                   .getLimitedValue());
LValue AllocatorTraitsLVal = CGF.EmitLValue(AllocatorTraits);
Address Addr = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
    AllocatorTraitsLVal.getAddress(CGF), CGF.VoidPtrPtrTy);
AllocatorTraitsLVal = CGF.MakeAddrLValue(Addr, CGF.getContext().VoidPtrTy,
                                         AllocatorTraitsLVal.getBaseInfo(),
                                         AllocatorTraitsLVal.getTBAAInfo());
llvm::Value *Traits =
    CGF.EmitLoadOfScalar(AllocatorTraitsLVal, AllocatorTraits->getExprLoc());

llvm::Value *AllocatorVal =
    CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                            CGM.getModule(), OMPRTL___kmpc_init_allocator),
                        {ThreadId, MemSpaceHandle, NumTraits, Traits});
// Store to allocator.
CGF.EmitVarDecl(*cast<VarDecl>(
    cast<DeclRefExpr>(Allocator->IgnoreParenImpCasts())->getDecl()));
LValue AllocatorLVal = CGF.EmitLValue(Allocator->IgnoreParenImpCasts());
AllocatorVal =
    CGF.EmitScalarConversion(AllocatorVal, CGF.getContext().VoidPtrTy,
                             Allocator->getType(), Allocator->getExprLoc());
CGF.EmitStoreOfScalar(AllocatorVal, AllocatorLVal);
6470}

6472void CGOpenMPRuntime::emitUsesAllocatorsFini(CodeGenFunction &CGF,
                                           const Expr *Allocator) {
llvm::Value *ThreadId = getThreadID(CGF, Allocator->getExprLoc());
ThreadId = CGF.Builder.CreateIntCast(ThreadId, CGF.IntTy, /*isSigned=*/true);
LValue AllocatorLVal = CGF.EmitLValue(Allocator->IgnoreParenImpCasts());
llvm::Value *AllocatorVal =
    CGF.EmitLoadOfScalar(AllocatorLVal, Allocator->getExprLoc());
AllocatorVal = CGF.EmitScalarConversion(AllocatorVal, Allocator->getType(),
                                        CGF.getContext().VoidPtrTy,
                                        Allocator->getExprLoc());
(void)CGF.EmitRuntimeCall(
    OMPBuilder.getOrCreateRuntimeFunction(CGM.getModule(),
                                          OMPRTL___kmpc_destroy_allocator),
    {ThreadId, AllocatorVal});
6486}

6488void CGOpenMPRuntime::emitTargetOutlinedFunctionHelper(
  const OMPExecutableDirective &D, StringRef ParentName,
  llvm::Function *&OutlinedFn, llvm::Constant *&OutlinedFnID,
  bool IsOffloadEntry, const RegionCodeGenTy &CodeGen) {
// Create a unique name for the entry function using the source location
// information of the current target region. The name will be something like:
//
// __omp_offloading_DD_FFFF_PP_lBB
//
// where DD_FFFF is an ID unique to the file (device and file IDs), PP is the
// mangled name of the function that encloses the target region and BB is the
// line number of the target region.

unsigned DeviceID;
unsigned FileID;
unsigned Line;
getTargetEntryUniqueInfo(CGM.getContext(), D.getBeginLoc(), DeviceID, FileID,
                         Line);
SmallString<64> EntryFnName;
{
  llvm::raw_svector_ostream OS(EntryFnName);
  OS << "__omp_offloading" << llvm::format("_%x", DeviceID)
     << llvm::format("_%x_", FileID) << ParentName << "_l" << Line;
}

const CapturedStmt &CS = *D.getCapturedStmt(OMPD_target);

CodeGenFunction CGF(CGM, true);
CGOpenMPTargetRegionInfo CGInfo(CS, CodeGen, EntryFnName);
CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(CGF, &CGInfo);

OutlinedFn = CGF.GenerateOpenMPCapturedStmtFunction(CS, D.getBeginLoc());

// If this target outline function is not an offload entry, we don't need to
// register it.
if (!IsOffloadEntry)
  return;

// The target region ID is used by the runtime library to identify the current
// target region, so it only has to be unique and not necessarily point to
// anything. It could be the pointer to the outlined function that implements
// the target region, but we aren't using that so that the compiler doesn't
// need to keep that, and could therefore inline the host function if proven
// worthwhile during optimization. In the other hand, if emitting code for the
// device, the ID has to be the function address so that it can retrieved from
// the offloading entry and launched by the runtime library. We also mark the
// outlined function to have external linkage in case we are emitting code for
// the device, because these functions will be entry points to the device.

if (CGM.getLangOpts().OpenMPIsDevice) {
  OutlinedFnID = llvm::ConstantExpr::getBitCast(OutlinedFn, CGM.Int8PtrTy);
  OutlinedFn->setLinkage(llvm::GlobalValue::WeakAnyLinkage);
  OutlinedFn->setDSOLocal(false);
  if (CGM.getTriple().isAMDGCN())
    OutlinedFn->setCallingConv(llvm::CallingConv::AMDGPU_KERNEL);
} else {
  std::string Name = getName({EntryFnName, "region_id"});
  OutlinedFnID = new llvm::GlobalVariable(
      CGM.getModule(), CGM.Int8Ty, /*isConstant=*/true,
      llvm::GlobalValue::WeakAnyLinkage,
      llvm::Constant::getNullValue(CGM.Int8Ty), Name);
}

// Register the information for the entry associated with this target region.
OffloadEntriesInfoManager.registerTargetRegionEntryInfo(
    DeviceID, FileID, ParentName, Line, OutlinedFn, OutlinedFnID,
    OffloadEntriesInfoManagerTy::OMPTargetRegionEntryTargetRegion);

// Add NumTeams and ThreadLimit attributes to the outlined GPU function
int32_t DefaultValTeams = -1;
getNumTeamsExprForTargetDirective(CGF, D, DefaultValTeams);
if (DefaultValTeams > 0) {
  OutlinedFn->addFnAttr("omp_target_num_teams",
                        std::to_string(DefaultValTeams));
}
int32_t DefaultValThreads = -1;
getNumThreadsExprForTargetDirective(CGF, D, DefaultValThreads);
if (DefaultValThreads > 0) {
  OutlinedFn->addFnAttr("omp_target_thread_limit",
                        std::to_string(DefaultValThreads));
}
6569}

6571/// Checks if the expression is constant or does not have non-trivial function
6572/// calls.
6573static bool isTrivial(ASTContext &Ctx, const Expr * E) {
// We can skip constant expressions.
// We can skip expressions with trivial calls or simple expressions.
return (E->isEvaluatable(Ctx, Expr::SE_AllowUndefinedBehavior) ||
        !E->hasNonTrivialCall(Ctx)) &&
       !E->HasSideEffects(Ctx, /*IncludePossibleEffects=*/true);
6579}

6581const Stmt *CGOpenMPRuntime::getSingleCompoundChild(ASTContext &Ctx,
                                                  const Stmt *Body) {
const Stmt *Child = Body->IgnoreContainers();
while (const auto *C = dyn_cast_or_null<CompoundStmt>(Child)) {
  Child = nullptr;
  for (const Stmt *S : C->body()) {
    if (const auto *E = dyn_cast<Expr>(S)) {
      if (isTrivial(Ctx, E))
        continue;
    }
    // Some of the statements can be ignored.
    if (isa<AsmStmt>(S) || isa<NullStmt>(S) || isa<OMPFlushDirective>(S) ||
        isa<OMPBarrierDirective>(S) || isa<OMPTaskyieldDirective>(S))
      continue;
    // Analyze declarations.
    if (const auto *DS = dyn_cast<DeclStmt>(S)) {
      if (llvm::all_of(DS->decls(), [](const Decl *D) {
            if (isa<EmptyDecl>(D) || isa<DeclContext>(D) ||
                isa<TypeDecl>(D) || isa<PragmaCommentDecl>(D) ||
                isa<PragmaDetectMismatchDecl>(D) || isa<UsingDecl>(D) ||
                isa<UsingDirectiveDecl>(D) ||
                isa<OMPDeclareReductionDecl>(D) ||
                isa<OMPThreadPrivateDecl>(D) || isa<OMPAllocateDecl>(D))
              return true;
            const auto *VD = dyn_cast<VarDecl>(D);
            if (!VD)
              return false;
            return VD->hasGlobalStorage() || !VD->isUsed();
          }))
        continue;
    }
    // Found multiple children - cannot get the one child only.
    if (Child)
      return nullptr;
    Child = S;
  }
  if (Child)
    Child = Child->IgnoreContainers();
}
return Child;
6621}

6623const Expr *CGOpenMPRuntime::getNumTeamsExprForTargetDirective(
  CodeGenFunction &CGF, const OMPExecutableDirective &D,
  int32_t &DefaultVal) {

OpenMPDirectiveKind DirectiveKind = D.getDirectiveKind();
assert(isOpenMPTargetExecutionDirective(DirectiveKind) &&((void)0)
       "Expected target-based executable directive.")((void)0);
switch (DirectiveKind) {
case OMPD_target: {
  const auto *CS = D.getInnermostCapturedStmt();
  const auto *Body =
      CS->getCapturedStmt()->IgnoreContainers(/*IgnoreCaptured=*/true);
  const Stmt *ChildStmt =
      CGOpenMPRuntime::getSingleCompoundChild(CGF.getContext(), Body);
  if (const auto *NestedDir =
          dyn_cast_or_null<OMPExecutableDirective>(ChildStmt)) {
    if (isOpenMPTeamsDirective(NestedDir->getDirectiveKind())) {
      if (NestedDir->hasClausesOfKind<OMPNumTeamsClause>()) {
        const Expr *NumTeams =
            NestedDir->getSingleClause<OMPNumTeamsClause>()->getNumTeams();
        if (NumTeams->isIntegerConstantExpr(CGF.getContext()))
          if (auto Constant =
                  NumTeams->getIntegerConstantExpr(CGF.getContext()))
            DefaultVal = Constant->getExtValue();
        return NumTeams;
      }
      DefaultVal = 0;
      return nullptr;
    }
    if (isOpenMPParallelDirective(NestedDir->getDirectiveKind()) ||
        isOpenMPSimdDirective(NestedDir->getDirectiveKind())) {
      DefaultVal = 1;
      return nullptr;
    }
    DefaultVal = 1;
    return nullptr;
  }
  // A value of -1 is used to check if we need to emit no teams region
  DefaultVal = -1;
  return nullptr;
}
case OMPD_target_teams:
case OMPD_target_teams_distribute:
case OMPD_target_teams_distribute_simd:
case OMPD_target_teams_distribute_parallel_for:
case OMPD_target_teams_distribute_parallel_for_simd: {
  if (D.hasClausesOfKind<OMPNumTeamsClause>()) {
    const Expr *NumTeams =
        D.getSingleClause<OMPNumTeamsClause>()->getNumTeams();
    if (NumTeams->isIntegerConstantExpr(CGF.getContext()))
      if (auto Constant = NumTeams->getIntegerConstantExpr(CGF.getContext()))
        DefaultVal = Constant->getExtValue();
    return NumTeams;
  }
  DefaultVal = 0;
  return nullptr;
}
case OMPD_target_parallel:
case OMPD_target_parallel_for:
case OMPD_target_parallel_for_simd:
case OMPD_target_simd:
  DefaultVal = 1;
  return nullptr;
case OMPD_parallel:
case OMPD_for:
case OMPD_parallel_for:
case OMPD_parallel_master:
case OMPD_parallel_sections:
case OMPD_for_simd:
case OMPD_parallel_for_simd:
case OMPD_cancel:
case OMPD_cancellation_point:
case OMPD_ordered:
case OMPD_threadprivate:
case OMPD_allocate:
case OMPD_task:
case OMPD_simd:
case OMPD_tile:
case OMPD_unroll:
case OMPD_sections:
case OMPD_section:
case OMPD_single:
case OMPD_master:
case OMPD_critical:
case OMPD_taskyield:
case OMPD_barrier:
case OMPD_taskwait:
case OMPD_taskgroup:
case OMPD_atomic:
case OMPD_flush:
case OMPD_depobj:
case OMPD_scan:
case OMPD_teams:
case OMPD_target_data:
case OMPD_target_exit_data:
case OMPD_target_enter_data:
case OMPD_distribute:
case OMPD_distribute_simd:
case OMPD_distribute_parallel_for:
case OMPD_distribute_parallel_for_simd:
case OMPD_teams_distribute:
case OMPD_teams_distribute_simd:
case OMPD_teams_distribute_parallel_for:
case OMPD_teams_distribute_parallel_for_simd:
case OMPD_target_update:
case OMPD_declare_simd:
case OMPD_declare_variant:
case OMPD_begin_declare_variant:
case OMPD_end_declare_variant:
case OMPD_declare_target:
case OMPD_end_declare_target:
case OMPD_declare_reduction:
case OMPD_declare_mapper:
case OMPD_taskloop:
case OMPD_taskloop_simd:
case OMPD_master_taskloop:
case OMPD_master_taskloop_simd:
case OMPD_parallel_master_taskloop:
case OMPD_parallel_master_taskloop_simd:
case OMPD_requires:
case OMPD_unknown:
  break;
default:
  break;
}
llvm_unreachable("Unexpected directive kind.")__builtin_unreachable();
6749}

6751llvm::Value *CGOpenMPRuntime::emitNumTeamsForTargetDirective(
  CodeGenFunction &CGF, const OMPExecutableDirective &D) {
assert(!CGF.getLangOpts().OpenMPIsDevice &&((void)0)
       "Clauses associated with the teams directive expected to be emitted "((void)0)
       "only for the host!")((void)0);
CGBuilderTy &Bld = CGF.Builder;
int32_t DefaultNT = -1;
const Expr *NumTeams = getNumTeamsExprForTargetDirective(CGF, D, DefaultNT);
if (NumTeams != nullptr) {
  OpenMPDirectiveKind DirectiveKind = D.getDirectiveKind();

  switch (DirectiveKind) {
  case OMPD_target: {
    const auto *CS = D.getInnermostCapturedStmt();
    CGOpenMPInnerExprInfo CGInfo(CGF, *CS);
    CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(CGF, &CGInfo);
    llvm::Value *NumTeamsVal = CGF.EmitScalarExpr(NumTeams,
                                                /*IgnoreResultAssign*/ true);
    return Bld.CreateIntCast(NumTeamsVal, CGF.Int32Ty,
                           /*isSigned=*/true);
  }
  case OMPD_target_teams:
  case OMPD_target_teams_distribute:
  case OMPD_target_teams_distribute_simd:
  case OMPD_target_teams_distribute_parallel_for:
  case OMPD_target_teams_distribute_parallel_for_simd: {
    CodeGenFunction::RunCleanupsScope NumTeamsScope(CGF);
    llvm::Value *NumTeamsVal = CGF.EmitScalarExpr(NumTeams,
                                                /*IgnoreResultAssign*/ true);
    return Bld.CreateIntCast(NumTeamsVal, CGF.Int32Ty,
                           /*isSigned=*/true);
  }
  default:
    break;
  }
} else if (DefaultNT == -1) {
  return nullptr;
}

return Bld.getInt32(DefaultNT);
6791}

6793static llvm::Value *getNumThreads(CodeGenFunction &CGF, const CapturedStmt *CS,
                                llvm::Value *DefaultThreadLimitVal) {
const Stmt *Child = CGOpenMPRuntime::getSingleCompoundChild(
    CGF.getContext(), CS->getCapturedStmt());
if (const auto *Dir = dyn_cast_or_null<OMPExecutableDirective>(Child)) {
  if (isOpenMPParallelDirective(Dir->getDirectiveKind())) {
    llvm::Value *NumThreads = nullptr;
    llvm::Value *CondVal = nullptr;
    // Handle if clause. If if clause present, the number of threads is
    // calculated as <cond> ? (<numthreads> ? <numthreads> : 0 ) : 1.
    if (Dir->hasClausesOfKind<OMPIfClause>()) {
      CGOpenMPInnerExprInfo CGInfo(CGF, *CS);
      CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(CGF, &CGInfo);
      const OMPIfClause *IfClause = nullptr;
      for (const auto *C : Dir->getClausesOfKind<OMPIfClause>()) {
        if (C->getNameModifier() == OMPD_unknown ||
            C->getNameModifier() == OMPD_parallel) {
          IfClause = C;
          break;
        }
      }
      if (IfClause) {
        const Expr *Cond = IfClause->getCondition();
        bool Result;
        if (Cond->EvaluateAsBooleanCondition(Result, CGF.getContext())) {
          if (!Result)
            return CGF.Builder.getInt32(1);
        } else {
          CodeGenFunction::LexicalScope Scope(CGF, Cond->getSourceRange());
          if (const auto *PreInit =
                  cast_or_null<DeclStmt>(IfClause->getPreInitStmt())) {
            for (const auto *I : PreInit->decls()) {
              if (!I->hasAttr<OMPCaptureNoInitAttr>()) {
                CGF.EmitVarDecl(cast<VarDecl>(*I));
              } else {
                CodeGenFunction::AutoVarEmission Emission =
                    CGF.EmitAutoVarAlloca(cast<VarDecl>(*I));
                CGF.EmitAutoVarCleanups(Emission);
              }
            }
          }
          CondVal = CGF.EvaluateExprAsBool(Cond);
        }
      }
    }
    // Check the value of num_threads clause iff if clause was not specified
    // or is not evaluated to false.
    if (Dir->hasClausesOfKind<OMPNumThreadsClause>()) {
      CGOpenMPInnerExprInfo CGInfo(CGF, *CS);
      CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(CGF, &CGInfo);
      const auto *NumThreadsClause =
          Dir->getSingleClause<OMPNumThreadsClause>();
      CodeGenFunction::LexicalScope Scope(
          CGF, NumThreadsClause->getNumThreads()->getSourceRange());
      if (const auto *PreInit =
              cast_or_null<DeclStmt>(NumThreadsClause->getPreInitStmt())) {
        for (const auto *I : PreInit->decls()) {
          if (!I->hasAttr<OMPCaptureNoInitAttr>()) {
            CGF.EmitVarDecl(cast<VarDecl>(*I));
          } else {
            CodeGenFunction::AutoVarEmission Emission =
                CGF.EmitAutoVarAlloca(cast<VarDecl>(*I));
            CGF.EmitAutoVarCleanups(Emission);
          }
        }
      }
      NumThreads = CGF.EmitScalarExpr(NumThreadsClause->getNumThreads());
      NumThreads = CGF.Builder.CreateIntCast(NumThreads, CGF.Int32Ty,
                                             /*isSigned=*/false);
      if (DefaultThreadLimitVal)
        NumThreads = CGF.Builder.CreateSelect(
            CGF.Builder.CreateICmpULT(DefaultThreadLimitVal, NumThreads),
            DefaultThreadLimitVal, NumThreads);
    } else {
      NumThreads = DefaultThreadLimitVal ? DefaultThreadLimitVal
                                         : CGF.Builder.getInt32(0);
    }
    // Process condition of the if clause.
    if (CondVal) {
      NumThreads = CGF.Builder.CreateSelect(CondVal, NumThreads,
                                            CGF.Builder.getInt32(1));
    }
    return NumThreads;
  }
  if (isOpenMPSimdDirective(Dir->getDirectiveKind()))
    return CGF.Builder.getInt32(1);
  return DefaultThreadLimitVal;
}
return DefaultThreadLimitVal ? DefaultThreadLimitVal
                             : CGF.Builder.getInt32(0);
6883}

6885const Expr *CGOpenMPRuntime::getNumThreadsExprForTargetDirective(
  CodeGenFunction &CGF, const OMPExecutableDirective &D,
  int32_t &DefaultVal) {
OpenMPDirectiveKind DirectiveKind = D.getDirectiveKind();
assert(isOpenMPTargetExecutionDirective(DirectiveKind) &&((void)0)
       "Expected target-based executable directive.")((void)0);

switch (DirectiveKind) {
case OMPD_target:
  // Teams have no clause thread_limit
  return nullptr;
case OMPD_target_teams:
case OMPD_target_teams_distribute:
  if (D.hasClausesOfKind<OMPThreadLimitClause>()) {
    const auto *ThreadLimitClause = D.getSingleClause<OMPThreadLimitClause>();
    const Expr *ThreadLimit = ThreadLimitClause->getThreadLimit();
    if (ThreadLimit->isIntegerConstantExpr(CGF.getContext()))
      if (auto Constant =
              ThreadLimit->getIntegerConstantExpr(CGF.getContext()))
        DefaultVal = Constant->getExtValue();
    return ThreadLimit;
  }
  return nullptr;
case OMPD_target_parallel:
case OMPD_target_parallel_for:
case OMPD_target_parallel_for_simd:
case OMPD_target_teams_distribute_parallel_for:
case OMPD_target_teams_distribute_parallel_for_simd: {
  Expr *ThreadLimit = nullptr;
  Expr *NumThreads = nullptr;
  if (D.hasClausesOfKind<OMPThreadLimitClause>()) {
    const auto *ThreadLimitClause = D.getSingleClause<OMPThreadLimitClause>();
    ThreadLimit = ThreadLimitClause->getThreadLimit();
    if (ThreadLimit->isIntegerConstantExpr(CGF.getContext()))
      if (auto Constant =
              ThreadLimit->getIntegerConstantExpr(CGF.getContext()))
        DefaultVal = Constant->getExtValue();
  }
  if (D.hasClausesOfKind<OMPNumThreadsClause>()) {
    const auto *NumThreadsClause = D.getSingleClause<OMPNumThreadsClause>();
    NumThreads = NumThreadsClause->getNumThreads();
    if (NumThreads->isIntegerConstantExpr(CGF.getContext())) {
      if (auto Constant =
              NumThreads->getIntegerConstantExpr(CGF.getContext())) {
        if (Constant->getExtValue() < DefaultVal) {
          DefaultVal = Constant->getExtValue();
          ThreadLimit = NumThreads;
        }
      }
    }
  }
  return ThreadLimit;
}
case OMPD_target_teams_distribute_simd:
case OMPD_target_simd:
  DefaultVal = 1;
  return nullptr;
case OMPD_parallel:
case OMPD_for:
case OMPD_parallel_for:
case OMPD_parallel_master:
case OMPD_parallel_sections:
case OMPD_for_simd:
case OMPD_parallel_for_simd:
case OMPD_cancel:
case OMPD_cancellation_point:
case OMPD_ordered:
case OMPD_threadprivate:
case OMPD_allocate:
case OMPD_task:
case OMPD_simd:
case OMPD_tile:
case OMPD_unroll:
case OMPD_sections:
case OMPD_section:
case OMPD_single:
case OMPD_master:
case OMPD_critical:
case OMPD_taskyield:
case OMPD_barrier:
case OMPD_taskwait:
case OMPD_taskgroup:
case OMPD_atomic:
case OMPD_flush:
case OMPD_depobj:
case OMPD_scan:
case OMPD_teams:
case OMPD_target_data:
case OMPD_target_exit_data:
case OMPD_target_enter_data:
case OMPD_distribute:
case OMPD_distribute_simd:
case OMPD_distribute_parallel_for:
case OMPD_distribute_parallel_for_simd:
case OMPD_teams_distribute:
case OMPD_teams_distribute_simd:
case OMPD_teams_distribute_parallel_for:
case OMPD_teams_distribute_parallel_for_simd:
case OMPD_target_update:
case OMPD_declare_simd:
case OMPD_declare_variant:
case OMPD_begin_declare_variant:
case OMPD_end_declare_variant:
case OMPD_declare_target:
case OMPD_end_declare_target:
case OMPD_declare_reduction:
case OMPD_declare_mapper:
case OMPD_taskloop:
case OMPD_taskloop_simd:
case OMPD_master_taskloop:
case OMPD_master_taskloop_simd:
case OMPD_parallel_master_taskloop:
case OMPD_parallel_master_taskloop_simd:
case OMPD_requires:
case OMPD_unknown:
  break;
default:
  break;
}
llvm_unreachable("Unsupported directive kind.")__builtin_unreachable();
7005}

7007llvm::Value *CGOpenMPRuntime::emitNumThreadsForTargetDirective(
  CodeGenFunction &CGF, const OMPExecutableDirective &D) {
assert(!CGF.getLangOpts().OpenMPIsDevice &&((void)0)
       "Clauses associated with the teams directive expected to be emitted "((void)0)
       "only for the host!")((void)0);
OpenMPDirectiveKind DirectiveKind = D.getDirectiveKind();
assert(isOpenMPTargetExecutionDirective(DirectiveKind) &&((void)0)
       "Expected target-based executable directive.")((void)0);
CGBuilderTy &Bld = CGF.Builder;
llvm::Value *ThreadLimitVal = nullptr;
llvm::Value *NumThreadsVal = nullptr;
switch (DirectiveKind) {
case OMPD_target: {
  const CapturedStmt *CS = D.getInnermostCapturedStmt();
  if (llvm::Value *NumThreads = getNumThreads(CGF, CS, ThreadLimitVal))
    return NumThreads;
  const Stmt *Child = CGOpenMPRuntime::getSingleCompoundChild(
      CGF.getContext(), CS->getCapturedStmt());
  if (const auto *Dir = dyn_cast_or_null<OMPExecutableDirective>(Child)) {
    if (Dir->hasClausesOfKind<OMPThreadLimitClause>()) {
      CGOpenMPInnerExprInfo CGInfo(CGF, *CS);
      CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(CGF, &CGInfo);
      const auto *ThreadLimitClause =
          Dir->getSingleClause<OMPThreadLimitClause>();
      CodeGenFunction::LexicalScope Scope(
          CGF, ThreadLimitClause->getThreadLimit()->getSourceRange());
      if (const auto *PreInit =
              cast_or_null<DeclStmt>(ThreadLimitClause->getPreInitStmt())) {
        for (const auto *I : PreInit->decls()) {
          if (!I->hasAttr<OMPCaptureNoInitAttr>()) {
            CGF.EmitVarDecl(cast<VarDecl>(*I));
          } else {
            CodeGenFunction::AutoVarEmission Emission =
                CGF.EmitAutoVarAlloca(cast<VarDecl>(*I));
            CGF.EmitAutoVarCleanups(Emission);
          }
        }
      }
      llvm::Value *ThreadLimit = CGF.EmitScalarExpr(
          ThreadLimitClause->getThreadLimit(), /*IgnoreResultAssign=*/true);
      ThreadLimitVal =
          Bld.CreateIntCast(ThreadLimit, CGF.Int32Ty, /*isSigned=*/false);
    }
    if (isOpenMPTeamsDirective(Dir->getDirectiveKind()) &&
        !isOpenMPDistributeDirective(Dir->getDirectiveKind())) {
      CS = Dir->getInnermostCapturedStmt();
      const Stmt *Child = CGOpenMPRuntime::getSingleCompoundChild(
          CGF.getContext(), CS->getCapturedStmt());
      Dir = dyn_cast_or_null<OMPExecutableDirective>(Child);
    }
    if (Dir && isOpenMPDistributeDirective(Dir->getDirectiveKind()) &&
        !isOpenMPSimdDirective(Dir->getDirectiveKind())) {
      CS = Dir->getInnermostCapturedStmt();
      if (llvm::Value *NumThreads = getNumThreads(CGF, CS, ThreadLimitVal))
        return NumThreads;
    }
    if (Dir && isOpenMPSimdDirective(Dir->getDirectiveKind()))
      return Bld.getInt32(1);
  }
  return ThreadLimitVal ? ThreadLimitVal : Bld.getInt32(0);
}
case OMPD_target_teams: {
  if (D.hasClausesOfKind<OMPThreadLimitClause>()) {
    CodeGenFunction::RunCleanupsScope ThreadLimitScope(CGF);
    const auto *ThreadLimitClause = D.getSingleClause<OMPThreadLimitClause>();
    llvm::Value *ThreadLimit = CGF.EmitScalarExpr(
        ThreadLimitClause->getThreadLimit(), /*IgnoreResultAssign=*/true);
    ThreadLimitVal =
        Bld.CreateIntCast(ThreadLimit, CGF.Int32Ty, /*isSigned=*/false);
  }
  const CapturedStmt *CS = D.getInnermostCapturedStmt();
  if (llvm::Value *NumThreads = getNumThreads(CGF, CS, ThreadLimitVal))
    return NumThreads;
  const Stmt *Child = CGOpenMPRuntime::getSingleCompoundChild(
      CGF.getContext(), CS->getCapturedStmt());
  if (const auto *Dir = dyn_cast_or_null<OMPExecutableDirective>(Child)) {
    if (Dir->getDirectiveKind() == OMPD_distribute) {
      CS = Dir->getInnermostCapturedStmt();
      if (llvm::Value *NumThreads = getNumThreads(CGF, CS, ThreadLimitVal))
        return NumThreads;
    }
  }
  return ThreadLimitVal ? ThreadLimitVal : Bld.getInt32(0);
}
case OMPD_target_teams_distribute:
  if (D.hasClausesOfKind<OMPThreadLimitClause>()) {
    CodeGenFunction::RunCleanupsScope ThreadLimitScope(CGF);
    const auto *ThreadLimitClause = D.getSingleClause<OMPThreadLimitClause>();
    llvm::Value *ThreadLimit = CGF.EmitScalarExpr(
        ThreadLimitClause->getThreadLimit(), /*IgnoreResultAssign=*/true);
    ThreadLimitVal =
        Bld.CreateIntCast(ThreadLimit, CGF.Int32Ty, /*isSigned=*/false);
  }
  return getNumThreads(CGF, D.getInnermostCapturedStmt(), ThreadLimitVal);
case OMPD_target_parallel:
case OMPD_target_parallel_for:
case OMPD_target_parallel_for_simd:
case OMPD_target_teams_distribute_parallel_for:
case OMPD_target_teams_distribute_parallel_for_simd: {
  llvm::Value *CondVal = nullptr;
  // Handle if clause. If if clause present, the number of threads is
  // calculated as <cond> ? (<numthreads> ? <numthreads> : 0 ) : 1.
  if (D.hasClausesOfKind<OMPIfClause>()) {
    const OMPIfClause *IfClause = nullptr;
    for (const auto *C : D.getClausesOfKind<OMPIfClause>()) {
      if (C->getNameModifier() == OMPD_unknown ||
          C->getNameModifier() == OMPD_parallel) {
        IfClause = C;
        break;
      }
    }
    if (IfClause) {
      const Expr *Cond = IfClause->getCondition();
      bool Result;
      if (Cond->EvaluateAsBooleanCondition(Result, CGF.getContext())) {
        if (!Result)
          return Bld.getInt32(1);
      } else {
        CodeGenFunction::RunCleanupsScope Scope(CGF);
        CondVal = CGF.EvaluateExprAsBool(Cond);
      }
    }
  }
  if (D.hasClausesOfKind<OMPThreadLimitClause>()) {
    CodeGenFunction::RunCleanupsScope ThreadLimitScope(CGF);
    const auto *ThreadLimitClause = D.getSingleClause<OMPThreadLimitClause>();
    llvm::Value *ThreadLimit = CGF.EmitScalarExpr(
        ThreadLimitClause->getThreadLimit(), /*IgnoreResultAssign=*/true);
    ThreadLimitVal =
        Bld.CreateIntCast(ThreadLimit, CGF.Int32Ty, /*isSigned=*/false);
  }
  if (D.hasClausesOfKind<OMPNumThreadsClause>()) {
    CodeGenFunction::RunCleanupsScope NumThreadsScope(CGF);
    const auto *NumThreadsClause = D.getSingleClause<OMPNumThreadsClause>();
    llvm::Value *NumThreads = CGF.EmitScalarExpr(
        NumThreadsClause->getNumThreads(), /*IgnoreResultAssign=*/true);
    NumThreadsVal =
        Bld.CreateIntCast(NumThreads, CGF.Int32Ty, /*isSigned=*/false);
    ThreadLimitVal = ThreadLimitVal
                         ? Bld.CreateSelect(Bld.CreateICmpULT(NumThreadsVal,
                                                              ThreadLimitVal),
                                            NumThreadsVal, ThreadLimitVal)
                         : NumThreadsVal;
  }
  if (!ThreadLimitVal)
    ThreadLimitVal = Bld.getInt32(0);
  if (CondVal)
    return Bld.CreateSelect(CondVal, ThreadLimitVal, Bld.getInt32(1));
  return ThreadLimitVal;
}
case OMPD_target_teams_distribute_simd:
case OMPD_target_simd:
  return Bld.getInt32(1);
case OMPD_parallel:
case OMPD_for:
case OMPD_parallel_for:
case OMPD_parallel_master:
case OMPD_parallel_sections:
case OMPD_for_simd:
case OMPD_parallel_for_simd:
case OMPD_cancel:
case OMPD_cancellation_point:
case OMPD_ordered:
case OMPD_threadprivate:
case OMPD_allocate:
case OMPD_task:
case OMPD_simd:
case OMPD_tile:
case OMPD_unroll:
case OMPD_sections:
case OMPD_section:
case OMPD_single:
case OMPD_master:
case OMPD_critical:
case OMPD_taskyield:
case OMPD_barrier:
case OMPD_taskwait:
case OMPD_taskgroup:
case OMPD_atomic:
case OMPD_flush:
case OMPD_depobj:
case OMPD_scan:
case OMPD_teams:
case OMPD_target_data:
case OMPD_target_exit_data:
case OMPD_target_enter_data:
case OMPD_distribute:
case OMPD_distribute_simd:
case OMPD_distribute_parallel_for:
case OMPD_distribute_parallel_for_simd:
case OMPD_teams_distribute:
case OMPD_teams_distribute_simd:
case OMPD_teams_distribute_parallel_for:
case OMPD_teams_distribute_parallel_for_simd:
case OMPD_target_update:
case OMPD_declare_simd:
case OMPD_declare_variant:
case OMPD_begin_declare_variant:
case OMPD_end_declare_variant:
case OMPD_declare_target:
case OMPD_end_declare_target:
case OMPD_declare_reduction:
case OMPD_declare_mapper:
case OMPD_taskloop:
case OMPD_taskloop_simd:
case OMPD_master_taskloop:
case OMPD_master_taskloop_simd:
case OMPD_parallel_master_taskloop:
case OMPD_parallel_master_taskloop_simd:
case OMPD_requires:
case OMPD_unknown:
  break;
default:
  break;
}
llvm_unreachable("Unsupported directive kind.")__builtin_unreachable();
7223}

7225namespace {
7226LLVM_ENABLE_BITMASK_ENUMS_IN_NAMESPACE()using ::llvm::BitmaskEnumDetail::operator~; using ::llvm::BitmaskEnumDetail
::operator|; using ::llvm::BitmaskEnumDetail::operator&; using
 ::llvm::BitmaskEnumDetail::operator^; using ::llvm::BitmaskEnumDetail
::operator|=; using ::llvm::BitmaskEnumDetail::operator&=
; using ::llvm::BitmaskEnumDetail::operator^=;

7228// Utility to handle information from clauses associated with a given
7229// construct that use mappable expressions (e.g. 'map' clause, 'to' clause).
7230// It provides a convenient interface to obtain the information and generate
7231// code for that information.
7232class MappableExprsHandler {
7233public:
/// Values for bit flags used to specify the mapping type for
/// offloading.
enum OpenMPOffloadMappingFlags : uint64_t {
  /// No flags
  OMP_MAP_NONE = 0x0,
  /// Allocate memory on the device and move data from host to device.
  OMP_MAP_TO = 0x01,
  /// Allocate memory on the device and move data from device to host.
  OMP_MAP_FROM = 0x02,
  /// Always perform the requested mapping action on the element, even
  /// if it was already mapped before.
  OMP_MAP_ALWAYS = 0x04,
  /// Delete the element from the device environment, ignoring the
  /// current reference count associated with the element.
  OMP_MAP_DELETE = 0x08,
  /// The element being mapped is a pointer-pointee pair; both the
  /// pointer and the pointee should be mapped.
  OMP_MAP_PTR_AND_OBJ = 0x10,
  /// This flags signals that the base address of an entry should be
  /// passed to the target kernel as an argument.
  OMP_MAP_TARGET_PARAM = 0x20,
  /// Signal that the runtime library has to return the device pointer
  /// in the current position for the data being mapped. Used when we have the
  /// use_device_ptr or use_device_addr clause.
  OMP_MAP_RETURN_PARAM = 0x40,
  /// This flag signals that the reference being passed is a pointer to
  /// private data.
  OMP_MAP_PRIVATE = 0x80,
  /// Pass the element to the device by value.
  OMP_MAP_LITERAL = 0x100,
  /// Implicit map
  OMP_MAP_IMPLICIT = 0x200,
  /// Close is a hint to the runtime to allocate memory close to
  /// the target device.
  OMP_MAP_CLOSE = 0x400,
  /// 0x800 is reserved for compatibility with XLC.
  /// Produce a runtime error if the data is not already allocated.
  OMP_MAP_PRESENT = 0x1000,
  /// Signal that the runtime library should use args as an array of
  /// descriptor_dim pointers and use args_size as dims. Used when we have
  /// non-contiguous list items in target update directive
  OMP_MAP_NON_CONTIG = 0x100000000000,
  /// The 16 MSBs of the flags indicate whether the entry is member of some
  /// struct/class.
  OMP_MAP_MEMBER_OF = 0xffff000000000000,
  LLVM_MARK_AS_BITMASK_ENUM(/* LargestFlag = */ OMP_MAP_MEMBER_OF)LLVM_BITMASK_LARGEST_ENUMERATOR = OMP_MAP_MEMBER_OF,
};

/// Get the offset of the OMP_MAP_MEMBER_OF field.
static unsigned getFlagMemberOffset() {
  unsigned Offset = 0;
  for (uint64_t Remain = OMP_MAP_MEMBER_OF; !(Remain & 1);
       Remain = Remain >> 1)
    Offset++;
  return Offset;
}

/// Class that holds debugging information for a data mapping to be passed to
/// the runtime library.
class MappingExprInfo {
  /// The variable declaration used for the data mapping.
  const ValueDecl *MapDecl = nullptr;
  /// The original expression used in the map clause, or null if there is
  /// none.
  const Expr *MapExpr = nullptr;

public:
  MappingExprInfo(const ValueDecl *MapDecl, const Expr *MapExpr = nullptr)
      : MapDecl(MapDecl), MapExpr(MapExpr) {}

  const ValueDecl *getMapDecl() const { return MapDecl; }
  const Expr *getMapExpr() const { return MapExpr; }
};

/// Class that associates information with a base pointer to be passed to the
/// runtime library.
class BasePointerInfo {
  /// The base pointer.
  llvm::Value *Ptr = nullptr;
  /// The base declaration that refers to this device pointer, or null if
  /// there is none.
  const ValueDecl *DevPtrDecl = nullptr;

public:
  BasePointerInfo(llvm::Value *Ptr, const ValueDecl *DevPtrDecl = nullptr)
      : Ptr(Ptr), DevPtrDecl(DevPtrDecl) {}
  llvm::Value *operator*() const { return Ptr; }
  const ValueDecl *getDevicePtrDecl() const { return DevPtrDecl; }
  void setDevicePtrDecl(const ValueDecl *D) { DevPtrDecl = D; }
};

using MapExprsArrayTy = SmallVector<MappingExprInfo, 4>;
using MapBaseValuesArrayTy = SmallVector<BasePointerInfo, 4>;
using MapValuesArrayTy = SmallVector<llvm::Value *, 4>;
using MapFlagsArrayTy = SmallVector<OpenMPOffloadMappingFlags, 4>;
using MapMappersArrayTy = SmallVector<const ValueDecl *, 4>;
using MapDimArrayTy = SmallVector<uint64_t, 4>;
using MapNonContiguousArrayTy = SmallVector<MapValuesArrayTy, 4>;

/// This structure contains combined information generated for mappable
/// clauses, including base pointers, pointers, sizes, map types, user-defined
/// mappers, and non-contiguous information.
struct MapCombinedInfoTy {
  struct StructNonContiguousInfo {
    bool IsNonContiguous = false;
    MapDimArrayTy Dims;
    MapNonContiguousArrayTy Offsets;
    MapNonContiguousArrayTy Counts;
    MapNonContiguousArrayTy Strides;
  };
  MapExprsArrayTy Exprs;
  MapBaseValuesArrayTy BasePointers;
  MapValuesArrayTy Pointers;
  MapValuesArrayTy Sizes;
  MapFlagsArrayTy Types;
  MapMappersArrayTy Mappers;
  StructNonContiguousInfo NonContigInfo;

  /// Append arrays in \a CurInfo.
  void append(MapCombinedInfoTy &CurInfo) {
    Exprs.append(CurInfo.Exprs.begin(), CurInfo.Exprs.end());
    BasePointers.append(CurInfo.BasePointers.begin(),
                        CurInfo.BasePointers.end());
    Pointers.append(CurInfo.Pointers.begin(), CurInfo.Pointers.end());
    Sizes.append(CurInfo.Sizes.begin(), CurInfo.Sizes.end());
    Types.append(CurInfo.Types.begin(), CurInfo.Types.end());
    Mappers.append(CurInfo.Mappers.begin(), CurInfo.Mappers.end());
    NonContigInfo.Dims.append(CurInfo.NonContigInfo.Dims.begin(),
                               CurInfo.NonContigInfo.Dims.end());
    NonContigInfo.Offsets.append(CurInfo.NonContigInfo.Offsets.begin(),
                                  CurInfo.NonContigInfo.Offsets.end());
    NonContigInfo.Counts.append(CurInfo.NonContigInfo.Counts.begin(),
                                 CurInfo.NonContigInfo.Counts.end());
    NonContigInfo.Strides.append(CurInfo.NonContigInfo.Strides.begin(),
                                  CurInfo.NonContigInfo.Strides.end());
  }
};

/// Map between a struct and the its lowest & highest elements which have been
/// mapped.
/// [ValueDecl *] --> {LE(FieldIndex, Pointer),
///                    HE(FieldIndex, Pointer)}
struct StructRangeInfoTy {
  MapCombinedInfoTy PreliminaryMapData;
  std::pair<unsigned /*FieldIndex*/, Address /*Pointer*/> LowestElem = {
      0, Address::invalid()};
  std::pair<unsigned /*FieldIndex*/, Address /*Pointer*/> HighestElem = {
      0, Address::invalid()};
  Address Base = Address::invalid();
  Address LB = Address::invalid();
  bool IsArraySection = false;
  bool HasCompleteRecord = false;
};

7388private:
/// Kind that defines how a device pointer has to be returned.
struct MapInfo {
  OMPClauseMappableExprCommon::MappableExprComponentListRef Components;
  OpenMPMapClauseKind MapType = OMPC_MAP_unknown;
  ArrayRef<OpenMPMapModifierKind> MapModifiers;
  ArrayRef<OpenMPMotionModifierKind> MotionModifiers;
  bool ReturnDevicePointer = false;
  bool IsImplicit = false;
  const ValueDecl *Mapper = nullptr;
  const Expr *VarRef = nullptr;
  bool ForDeviceAddr = false;

  MapInfo() = default;
  MapInfo(
      OMPClauseMappableExprCommon::MappableExprComponentListRef Components,
      OpenMPMapClauseKind MapType,
      ArrayRef<OpenMPMapModifierKind> MapModifiers,
      ArrayRef<OpenMPMotionModifierKind> MotionModifiers,
      bool ReturnDevicePointer, bool IsImplicit,
      const ValueDecl *Mapper = nullptr, const Expr *VarRef = nullptr,
      bool ForDeviceAddr = false)
      : Components(Components), MapType(MapType), MapModifiers(MapModifiers),
        MotionModifiers(MotionModifiers),
        ReturnDevicePointer(ReturnDevicePointer), IsImplicit(IsImplicit),
        Mapper(Mapper), VarRef(VarRef), ForDeviceAddr(ForDeviceAddr) {}
};

/// If use_device_ptr or use_device_addr is used on a decl which is a struct
/// member and there is no map information about it, then emission of that
/// entry is deferred until the whole struct has been processed.
struct DeferredDevicePtrEntryTy {
  const Expr *IE = nullptr;
  const ValueDecl *VD = nullptr;
  bool ForDeviceAddr = false;

  DeferredDevicePtrEntryTy(const Expr *IE, const ValueDecl *VD,
                           bool ForDeviceAddr)
      : IE(IE), VD(VD), ForDeviceAddr(ForDeviceAddr) {}
};

/// The target directive from where the mappable clauses were extracted. It
/// is either a executable directive or a user-defined mapper directive.
llvm::PointerUnion<const OMPExecutableDirective *,
                   const OMPDeclareMapperDecl *>
    CurDir;

/// Function the directive is being generated for.
CodeGenFunction &CGF;

/// Set of all first private variables in the current directive.
/// bool data is set to true if the variable is implicitly marked as
/// firstprivate, false otherwise.
llvm::DenseMap<CanonicalDeclPtr<const VarDecl>, bool> FirstPrivateDecls;

/// Map between device pointer declarations and their expression components.
/// The key value for declarations in 'this' is null.
llvm::DenseMap<
    const ValueDecl *,
    SmallVector<OMPClauseMappableExprCommon::MappableExprComponentListRef, 4>>
    DevPointersMap;

llvm::Value *getExprTypeSize(const Expr *E) const {
  QualType ExprTy = E->getType().getCanonicalType();

  // Calculate the size for array shaping expression.
  if (const auto *OAE = dyn_cast<OMPArrayShapingExpr>(E)) {
    llvm::Value *Size =
        CGF.getTypeSize(OAE->getBase()->getType()->getPointeeType());
    for (const Expr *SE : OAE->getDimensions()) {
      llvm::Value *Sz = CGF.EmitScalarExpr(SE);
      Sz = CGF.EmitScalarConversion(Sz, SE->getType(),
                                    CGF.getContext().getSizeType(),
                                    SE->getExprLoc());
      Size = CGF.Builder.CreateNUWMul(Size, Sz);
    }
    return Size;
  }

  // Reference types are ignored for mapping purposes.
  if (const auto *RefTy = ExprTy->getAs<ReferenceType>())
    ExprTy = RefTy->getPointeeType().getCanonicalType();

  // Given that an array section is considered a built-in type, we need to
  // do the calculation based on the length of the section instead of relying
  // on CGF.getTypeSize(E->getType()).
  if (const auto *OAE = dyn_cast<OMPArraySectionExpr>(E)) {
    QualType BaseTy = OMPArraySectionExpr::getBaseOriginalType(
                          OAE->getBase()->IgnoreParenImpCasts())
                          .getCanonicalType();

    // If there is no length associated with the expression and lower bound is
    // not specified too, that means we are using the whole length of the
    // base.
    if (!OAE->getLength() && OAE->getColonLocFirst().isValid() &&
        !OAE->getLowerBound())
      return CGF.getTypeSize(BaseTy);

    llvm::Value *ElemSize;
    if (const auto *PTy = BaseTy->getAs<PointerType>()) {
      ElemSize = CGF.getTypeSize(PTy->getPointeeType().getCanonicalType());
    } else {
      const auto *ATy = cast<ArrayType>(BaseTy.getTypePtr());
      assert(ATy && "Expecting array type if not a pointer type.")((void)0);
      ElemSize = CGF.getTypeSize(ATy->getElementType().getCanonicalType());
    }

    // If we don't have a length at this point, that is because we have an
    // array section with a single element.
    if (!OAE->getLength() && OAE->getColonLocFirst().isInvalid())
      return ElemSize;

    if (const Expr *LenExpr = OAE->getLength()) {
      llvm::Value *LengthVal = CGF.EmitScalarExpr(LenExpr);
      LengthVal = CGF.EmitScalarConversion(LengthVal, LenExpr->getType(),
                                           CGF.getContext().getSizeType(),
                                           LenExpr->getExprLoc());
      return CGF.Builder.CreateNUWMul(LengthVal, ElemSize);
    }
    assert(!OAE->getLength() && OAE->getColonLocFirst().isValid() &&((void)0)
           OAE->getLowerBound() && "expected array_section[lb:].")((void)0);
    // Size = sizetype - lb * elemtype;
    llvm::Value *LengthVal = CGF.getTypeSize(BaseTy);
    llvm::Value *LBVal = CGF.EmitScalarExpr(OAE->getLowerBound());
    LBVal = CGF.EmitScalarConversion(LBVal, OAE->getLowerBound()->getType(),
                                     CGF.getContext().getSizeType(),
                                     OAE->getLowerBound()->getExprLoc());
    LBVal = CGF.Builder.CreateNUWMul(LBVal, ElemSize);
    llvm::Value *Cmp = CGF.Builder.CreateICmpUGT(LengthVal, LBVal);
    llvm::Value *TrueVal = CGF.Builder.CreateNUWSub(LengthVal, LBVal);
    LengthVal = CGF.Builder.CreateSelect(
        Cmp, TrueVal, llvm::ConstantInt::get(CGF.SizeTy, 0));
    return LengthVal;
  }
  return CGF.getTypeSize(ExprTy);
}

/// Return the corresponding bits for a given map clause modifier. Add
/// a flag marking the map as a pointer if requested. Add a flag marking the
/// map as the first one of a series of maps that relate to the same map
/// expression.
OpenMPOffloadMappingFlags getMapTypeBits(
    OpenMPMapClauseKind MapType, ArrayRef<OpenMPMapModifierKind> MapModifiers,
    ArrayRef<OpenMPMotionModifierKind> MotionModifiers, bool IsImplicit,
    bool AddPtrFlag, bool AddIsTargetParamFlag, bool IsNonContiguous) const {
  OpenMPOffloadMappingFlags Bits =
      IsImplicit ? OMP_MAP_IMPLICIT : OMP_MAP_NONE;
  switch (MapType) {
  case OMPC_MAP_alloc:
  case OMPC_MAP_release:
    // alloc and release is the default behavior in the runtime library,  i.e.
    // if we don't pass any bits alloc/release that is what the runtime is
    // going to do. Therefore, we don't need to signal anything for these two
    // type modifiers.
    break;
  case OMPC_MAP_to:
    Bits |= OMP_MAP_TO;
    break;
  case OMPC_MAP_from:
    Bits |= OMP_MAP_FROM;
    break;
  case OMPC_MAP_tofrom:
    Bits |= OMP_MAP_TO | OMP_MAP_FROM;
    break;
  case OMPC_MAP_delete:
    Bits |= OMP_MAP_DELETE;
    break;
  case OMPC_MAP_unknown:
    llvm_unreachable("Unexpected map type!")__builtin_unreachable();
  }
  if (AddPtrFlag)
    Bits |= OMP_MAP_PTR_AND_OBJ;
  if (AddIsTargetParamFlag)
    Bits |= OMP_MAP_TARGET_PARAM;
  if (llvm::find(MapModifiers, OMPC_MAP_MODIFIER_always)
      != MapModifiers.end())
    Bits |= OMP_MAP_ALWAYS;
  if (llvm::find(MapModifiers, OMPC_MAP_MODIFIER_close)
      != MapModifiers.end())
    Bits |= OMP_MAP_CLOSE;
  if (llvm::find(MapModifiers, OMPC_MAP_MODIFIER_present) !=
          MapModifiers.end() ||
      llvm::find(MotionModifiers, OMPC_MOTION_MODIFIER_present) !=
          MotionModifiers.end())
    Bits |= OMP_MAP_PRESENT;
  if (IsNonContiguous)
    Bits |= OMP_MAP_NON_CONTIG;
  return Bits;
}

/// Return true if the provided expression is a final array section. A
/// final array section, is one whose length can't be proved to be one.
bool isFinalArraySectionExpression(const Expr *E) const {
  const auto *OASE = dyn_cast<OMPArraySectionExpr>(E);

  // It is not an array section and therefore not a unity-size one.
  if (!OASE)
    return false;

  // An array section with no colon always refer to a single element.
  if (OASE->getColonLocFirst().isInvalid())
    return false;

  const Expr *Length = OASE->getLength();

  // If we don't have a length we have to check if the array has size 1
  // for this dimension. Also, we should always expect a length if the
  // base type is pointer.
  if (!Length) {
    QualType BaseQTy = OMPArraySectionExpr::getBaseOriginalType(
                           OASE->getBase()->IgnoreParenImpCasts())
                           .getCanonicalType();
    if (const auto *ATy = dyn_cast<ConstantArrayType>(BaseQTy.getTypePtr()))
      return ATy->getSize().getSExtValue() != 1;
    // If we don't have a constant dimension length, we have to consider
    // the current section as having any size, so it is not necessarily
    // unitary. If it happen to be unity size, that's user fault.
    return true;
  }

  // Check if the length evaluates to 1.
  Expr::EvalResult Result;
  if (!Length->EvaluateAsInt(Result, CGF.getContext()))
    return true; // Can have more that size 1.

  llvm::APSInt ConstLength = Result.Val.getInt();
  return ConstLength.getSExtValue() != 1;
}

/// Generate the base pointers, section pointers, sizes, map type bits, and
/// user-defined mappers (all included in \a CombinedInfo) for the provided
/// map type, map or motion modifiers, and expression components.
/// \a IsFirstComponent should be set to true if the provided set of
/// components is the first associated with a capture.
void generateInfoForComponentList(
    OpenMPMapClauseKind MapType, ArrayRef<OpenMPMapModifierKind> MapModifiers,
    ArrayRef<OpenMPMotionModifierKind> MotionModifiers,
    OMPClauseMappableExprCommon::MappableExprComponentListRef Components,
    MapCombinedInfoTy &CombinedInfo, StructRangeInfoTy &PartialStruct,
    bool IsFirstComponentList, bool IsImplicit,
    const ValueDecl *Mapper = nullptr, bool ForDeviceAddr = false,
    const ValueDecl *BaseDecl = nullptr, const Expr *MapExpr = nullptr,
    ArrayRef<OMPClauseMappableExprCommon::MappableExprComponentListRef>
        OverlappedElements = llvm::None) const {
  // The following summarizes what has to be generated for each map and the
  // types below. The generated information is expressed in this order:
  // base pointer, section pointer, size, flags
  // (to add to the ones that come from the map type and modifier).
  //
  // double d;
  // int i[100];
  // float *p;
  //
  // struct S1 {
  //   int i;
  //   float f[50];
  // }
  // struct S2 {
  //   int i;
  //   float f[50];
  //   S1 s;
  //   double *p;
  //   struct S2 *ps;
  //   int &ref;
  // }
  // S2 s;
  // S2 *ps;
  //
  // map(d)
  // &d, &d, sizeof(double), TARGET_PARAM | TO | FROM
  //
  // map(i)
  // &i, &i, 100*sizeof(int), TARGET_PARAM | TO | FROM
  //
  // map(i[1:23])
  // &i(=&i[0]), &i[1], 23*sizeof(int), TARGET_PARAM | TO | FROM
  //
  // map(p)
  // &p, &p, sizeof(float*), TARGET_PARAM | TO | FROM
  //
  // map(p[1:24])
  // &p, &p[1], 24*sizeof(float), TARGET_PARAM | TO | FROM | PTR_AND_OBJ
  // in unified shared memory mode or for local pointers
  // p, &p[1], 24*sizeof(float), TARGET_PARAM | TO | FROM
  //
  // map(s)
  // &s, &s, sizeof(S2), TARGET_PARAM | TO | FROM
  //
  // map(s.i)
  // &s, &(s.i), sizeof(int), TARGET_PARAM | TO | FROM
  //
  // map(s.s.f)
  // &s, &(s.s.f[0]), 50*sizeof(float), TARGET_PARAM | TO | FROM
  //
  // map(s.p)
  // &s, &(s.p), sizeof(double*), TARGET_PARAM | TO | FROM
  //
  // map(to: s.p[:22])
  // &s, &(s.p), sizeof(double*), TARGET_PARAM (*)
  // &s, &(s.p), sizeof(double*), MEMBER_OF(1) (**)
  // &(s.p), &(s.p[0]), 22*sizeof(double),
  //   MEMBER_OF(1) | PTR_AND_OBJ | TO (***)
  // (*) alloc space for struct members, only this is a target parameter
  // (**) map the pointer (nothing to be mapped in this example) (the compiler
  //      optimizes this entry out, same in the examples below)
  // (***) map the pointee (map: to)
  //
  // map(to: s.ref)
  // &s, &(s.ref), sizeof(int*), TARGET_PARAM (*)
  // &s, &(s.ref), sizeof(int), MEMBER_OF(1) | PTR_AND_OBJ | TO (***)
  // (*) alloc space for struct members, only this is a target parameter
  // (**) map the pointer (nothing to be mapped in this example) (the compiler
  //      optimizes this entry out, same in the examples below)
  // (***) map the pointee (map: to)
  //
  // map(s.ps)
  // &s, &(s.ps), sizeof(S2*), TARGET_PARAM | TO | FROM
  //
  // map(from: s.ps->s.i)
  // &s, &(s.ps), sizeof(S2*), TARGET_PARAM
  // &s, &(s.ps), sizeof(S2*), MEMBER_OF(1)
  // &(s.ps), &(s.ps->s.i), sizeof(int), MEMBER_OF(1) | PTR_AND_OBJ  | FROM
  //
  // map(to: s.ps->ps)
  // &s, &(s.ps), sizeof(S2*), TARGET_PARAM
  // &s, &(s.ps), sizeof(S2*), MEMBER_OF(1)
  // &(s.ps), &(s.ps->ps), sizeof(S2*), MEMBER_OF(1) | PTR_AND_OBJ  | TO
  //
  // map(s.ps->ps->ps)
  // &s, &(s.ps), sizeof(S2*), TARGET_PARAM
  // &s, &(s.ps), sizeof(S2*), MEMBER_OF(1)
  // &(s.ps), &(s.ps->ps), sizeof(S2*), MEMBER_OF(1) | PTR_AND_OBJ
  // &(s.ps->ps), &(s.ps->ps->ps), sizeof(S2*), PTR_AND_OBJ | TO | FROM
  //
  // map(to: s.ps->ps->s.f[:22])
  // &s, &(s.ps), sizeof(S2*), TARGET_PARAM
  // &s, &(s.ps), sizeof(S2*), MEMBER_OF(1)
  // &(s.ps), &(s.ps->ps), sizeof(S2*), MEMBER_OF(1) | PTR_AND_OBJ
  // &(s.ps->ps), &(s.ps->ps->s.f[0]), 22*sizeof(float), PTR_AND_OBJ | TO
  //
  // map(ps)
  // &ps, &ps, sizeof(S2*), TARGET_PARAM | TO | FROM
  //
  // map(ps->i)
  // ps, &(ps->i), sizeof(int), TARGET_PARAM | TO | FROM
  //
  // map(ps->s.f)
  // ps, &(ps->s.f[0]), 50*sizeof(float), TARGET_PARAM | TO | FROM
  //
  // map(from: ps->p)
  // ps, &(ps->p), sizeof(double*), TARGET_PARAM | FROM
  //
  // map(to: ps->p[:22])
  // ps, &(ps->p), sizeof(double*), TARGET_PARAM
  // ps, &(ps->p), sizeof(double*), MEMBER_OF(1)
  // &(ps->p), &(ps->p[0]), 22*sizeof(double), MEMBER_OF(1) | PTR_AND_OBJ | TO
  //
  // map(ps->ps)
  // ps, &(ps->ps), sizeof(S2*), TARGET_PARAM | TO | FROM
  //
  // map(from: ps->ps->s.i)
  // ps, &(ps->ps), sizeof(S2*), TARGET_PARAM
  // ps, &(ps->ps), sizeof(S2*), MEMBER_OF(1)
  // &(ps->ps), &(ps->ps->s.i), sizeof(int), MEMBER_OF(1) | PTR_AND_OBJ | FROM
  //
  // map(from: ps->ps->ps)
  // ps, &(ps->ps), sizeof(S2*), TARGET_PARAM
  // ps, &(ps->ps), sizeof(S2*), MEMBER_OF(1)
  // &(ps->ps), &(ps->ps->ps), sizeof(S2*), MEMBER_OF(1) | PTR_AND_OBJ | FROM
  //
  // map(ps->ps->ps->ps)
  // ps, &(ps->ps), sizeof(S2*), TARGET_PARAM
  // ps, &(ps->ps), sizeof(S2*), MEMBER_OF(1)
  // &(ps->ps), &(ps->ps->ps), sizeof(S2*), MEMBER_OF(1) | PTR_AND_OBJ
  // &(ps->ps->ps), &(ps->ps->ps->ps), sizeof(S2*), PTR_AND_OBJ | TO | FROM
  //
  // map(to: ps->ps->ps->s.f[:22])
  // ps, &(ps->ps), sizeof(S2*), TARGET_PARAM
  // ps, &(ps->ps), sizeof(S2*), MEMBER_OF(1)
  // &(ps->ps), &(ps->ps->ps), sizeof(S2*), MEMBER_OF(1) | PTR_AND_OBJ
  // &(ps->ps->ps), &(ps->ps->ps->s.f[0]), 22*sizeof(float), PTR_AND_OBJ | TO
  //
  // map(to: s.f[:22]) map(from: s.p[:33])
  // &s, &(s.f[0]), 50*sizeof(float) + sizeof(struct S1) +
  //     sizeof(double*) (**), TARGET_PARAM
  // &s, &(s.f[0]), 22*sizeof(float), MEMBER_OF(1) | TO
  // &s, &(s.p), sizeof(double*), MEMBER_OF(1)
  // &(s.p), &(s.p[0]), 33*sizeof(double), MEMBER_OF(1) | PTR_AND_OBJ | FROM
  // (*) allocate contiguous space needed to fit all mapped members even if
  //     we allocate space for members not mapped (in this example,
  //     s.f[22..49] and s.s are not mapped, yet we must allocate space for
  //     them as well because they fall between &s.f[0] and &s.p)
  //
  // map(from: s.f[:22]) map(to: ps->p[:33])
  // &s, &(s.f[0]), 22*sizeof(float), TARGET_PARAM | FROM
  // ps, &(ps->p), sizeof(S2*), TARGET_PARAM
  // ps, &(ps->p), sizeof(double*), MEMBER_OF(2) (*)
  // &(ps->p), &(ps->p[0]), 33*sizeof(double), MEMBER_OF(2) | PTR_AND_OBJ | TO
  // (*) the struct this entry pertains to is the 2nd element in the list of
  //     arguments, hence MEMBER_OF(2)
  //
  // map(from: s.f[:22], s.s) map(to: ps->p[:33])
  // &s, &(s.f[0]), 50*sizeof(float) + sizeof(struct S1), TARGET_PARAM
  // &s, &(s.f[0]), 22*sizeof(float), MEMBER_OF(1) | FROM
  // &s, &(s.s), sizeof(struct S1), MEMBER_OF(1) | FROM
  // ps, &(ps->p), sizeof(S2*), TARGET_PARAM
  // ps, &(ps->p), sizeof(double*), MEMBER_OF(4) (*)
  // &(ps->p), &(ps->p[0]), 33*sizeof(double), MEMBER_OF(4) | PTR_AND_OBJ | TO
  // (*) the struct this entry pertains to is the 4th element in the list
  //     of arguments, hence MEMBER_OF(4)

  // Track if the map information being generated is the first for a capture.
  bool IsCaptureFirstInfo = IsFirstComponentList;
  // When the variable is on a declare target link or in a to clause with
  // unified memory, a reference is needed to hold the host/device address
  // of the variable.
  bool RequiresReference = false;

  // Scan the components from the base to the complete expression.
  auto CI = Components.rbegin();
  auto CE = Components.rend();
  auto I = CI;

  // Track if the map information being generated is the first for a list of
  // components.
  bool IsExpressionFirstInfo = true;
  bool FirstPointerInComplexData = false;
  Address BP = Address::invalid();
  const Expr *AssocExpr = I->getAssociatedExpression();
  const auto *AE = dyn_cast<ArraySubscriptExpr>(AssocExpr);
  const auto *OASE = dyn_cast<OMPArraySectionExpr>(AssocExpr);
  const auto *OAShE = dyn_cast<OMPArrayShapingExpr>(AssocExpr);

  if (isa<MemberExpr>(AssocExpr)) {
    // The base is the 'this' pointer. The content of the pointer is going
    // to be the base of the field being mapped.
    BP = CGF.LoadCXXThisAddress();
  } else if ((AE && isa<CXXThisExpr>(AE->getBase()->IgnoreParenImpCasts())) ||
             (OASE &&
              isa<CXXThisExpr>(OASE->getBase()->IgnoreParenImpCasts()))) {
    BP = CGF.EmitOMPSharedLValue(AssocExpr).getAddress(CGF);
  } else if (OAShE &&
             isa<CXXThisExpr>(OAShE->getBase()->IgnoreParenCasts())) {
    BP = Address(
        CGF.EmitScalarExpr(OAShE->getBase()),
        CGF.getContext().getTypeAlignInChars(OAShE->getBase()->getType()));
  } else {
    // The base is the reference to the variable.
    // BP = &Var.
    BP = CGF.EmitOMPSharedLValue(AssocExpr).getAddress(CGF);
    if (const auto *VD =
            dyn_cast_or_null<VarDecl>(I->getAssociatedDeclaration())) {
      if (llvm::Optional<OMPDeclareTargetDeclAttr::MapTypeTy> Res =
              OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(VD)) {
        if ((*Res == OMPDeclareTargetDeclAttr::MT_Link) ||
            (*Res == OMPDeclareTargetDeclAttr::MT_To &&
             CGF.CGM.getOpenMPRuntime().hasRequiresUnifiedSharedMemory())) {
          RequiresReference = true;
          BP = CGF.CGM.getOpenMPRuntime().getAddrOfDeclareTargetVar(VD);
        }
      }
    }

    // If the variable is a pointer and is being dereferenced (i.e. is not
    // the last component), the base has to be the pointer itself, not its
    // reference. References are ignored for mapping purposes.
    QualType Ty =
        I->getAssociatedDeclaration()->getType().getNonReferenceType();
    if (Ty->isAnyPointerType() && std::next(I) != CE) {
      // No need to generate individual map information for the pointer, it
      // can be associated with the combined storage if shared memory mode is
      // active or the base declaration is not global variable.
      const auto *VD = dyn_cast<VarDecl>(I->getAssociatedDeclaration());
      if (CGF.CGM.getOpenMPRuntime().hasRequiresUnifiedSharedMemory() ||
          !VD || VD->hasLocalStorage())
        BP = CGF.EmitLoadOfPointer(BP, Ty->castAs<PointerType>());
      else
        FirstPointerInComplexData = true;
      ++I;
    }
  }

  // Track whether a component of the list should be marked as MEMBER_OF some
  // combined entry (for partial structs). Only the first PTR_AND_OBJ entry
  // in a component list should be marked as MEMBER_OF, all subsequent entries
  // do not belong to the base struct. E.g.
  // struct S2 s;
  // s.ps->ps->ps->f[:]
  //   (1) (2) (3) (4)
  // ps(1) is a member pointer, ps(2) is a pointee of ps(1), so it is a
  // PTR_AND_OBJ entry; the PTR is ps(1), so MEMBER_OF the base struct. ps(3)
  // is the pointee of ps(2) which is not member of struct s, so it should not
  // be marked as such (it is still PTR_AND_OBJ).
  // The variable is initialized to false so that PTR_AND_OBJ entries which
  // are not struct members are not considered (e.g. array of pointers to
  // data).
  bool ShouldBeMemberOf = false;

  // Variable keeping track of whether or not we have encountered a component
  // in the component list which is a member expression. Useful when we have a
  // pointer or a final array section, in which case it is the previous
  // component in the list which tells us whether we have a member expression.
  // E.g. X.f[:]
  // While processing the final array section "[:]" it is "f" which tells us
  // whether we are dealing with a member of a declared struct.
  const MemberExpr *EncounteredME = nullptr;

  // Track for the total number of dimension. Start from one for the dummy
  // dimension.
  uint64_t DimSize = 1;

  bool IsNonContiguous = CombinedInfo.NonContigInfo.IsNonContiguous;
  bool IsPrevMemberReference = false;

  for (; I != CE; ++I) {
    // If the current component is member of a struct (parent struct) mark it.
    if (!EncounteredME) {
      EncounteredME = dyn_cast<MemberExpr>(I->getAssociatedExpression());
      // If we encounter a PTR_AND_OBJ entry from now on it should be marked
      // as MEMBER_OF the parent struct.
      if (EncounteredME) {
        ShouldBeMemberOf = true;
        // Do not emit as complex pointer if this is actually not array-like
        // expression.
        if (FirstPointerInComplexData) {
          QualType Ty = std::prev(I)
                            ->getAssociatedDeclaration()
                            ->getType()
                            .getNonReferenceType();
          BP = CGF.EmitLoadOfPointer(BP, Ty->castAs<PointerType>());
          FirstPointerInComplexData = false;
        }
      }
    }

    auto Next = std::next(I);

    // We need to generate the addresses and sizes if this is the last
    // component, if the component is a pointer or if it is an array section
    // whose length can't be proved to be one. If this is a pointer, it
    // becomes the base address for the following components.

    // A final array section, is one whose length can't be proved to be one.
    // If the map item is non-contiguous then we don't treat any array section
    // as final array section.
    bool IsFinalArraySection =
        !IsNonContiguous &&
        isFinalArraySectionExpression(I->getAssociatedExpression());

    // If we have a declaration for the mapping use that, otherwise use
    // the base declaration of the map clause.
    const ValueDecl *MapDecl = (I->getAssociatedDeclaration())
                                   ? I->getAssociatedDeclaration()
                                   : BaseDecl;
    MapExpr = (I->getAssociatedExpression()) ? I->getAssociatedExpression()
                                             : MapExpr;

    // Get information on whether the element is a pointer. Have to do a
    // special treatment for array sections given that they are built-in
    // types.
    const auto *OASE =
        dyn_cast<OMPArraySectionExpr>(I->getAssociatedExpression());
    const auto *OAShE =
        dyn_cast<OMPArrayShapingExpr>(I->getAssociatedExpression());
    const auto *UO = dyn_cast<UnaryOperator>(I->getAssociatedExpression());
    const auto *BO = dyn_cast<BinaryOperator>(I->getAssociatedExpression());
    bool IsPointer =
        OAShE ||
        (OASE && OMPArraySectionExpr::getBaseOriginalType(OASE)
                     .getCanonicalType()
                     ->isAnyPointerType()) ||
        I->getAssociatedExpression()->getType()->isAnyPointerType();
    bool IsMemberReference = isa<MemberExpr>(I->getAssociatedExpression()) &&
                             MapDecl &&
                             MapDecl->getType()->isLValueReferenceType();
    bool IsNonDerefPointer = IsPointer && !UO && !BO && !IsNonContiguous;

    if (OASE)
      ++DimSize;

    if (Next == CE || IsMemberReference || IsNonDerefPointer ||
        IsFinalArraySection) {
      // If this is not the last component, we expect the pointer to be
      // associated with an array expression or member expression.
      assert((Next == CE ||((void)0)
              isa<MemberExpr>(Next->getAssociatedExpression()) ||((void)0)
              isa<ArraySubscriptExpr>(Next->getAssociatedExpression()) ||((void)0)
              isa<OMPArraySectionExpr>(Next->getAssociatedExpression()) ||((void)0)
              isa<OMPArrayShapingExpr>(Next->getAssociatedExpression()) ||((void)0)
              isa<UnaryOperator>(Next->getAssociatedExpression()) ||((void)0)
              isa<BinaryOperator>(Next->getAssociatedExpression())) &&((void)0)
             "Unexpected expression")((void)0);

      Address LB = Address::invalid();
      Address LowestElem = Address::invalid();
      auto &&EmitMemberExprBase = [](CodeGenFunction &CGF,
                                     const MemberExpr *E) {
        const Expr *BaseExpr = E->getBase();
        // If this is s.x, emit s as an lvalue.  If it is s->x, emit s as a
        // scalar.
        LValue BaseLV;
        if (E->isArrow()) {
          LValueBaseInfo BaseInfo;
          TBAAAccessInfo TBAAInfo;
          Address Addr =
              CGF.EmitPointerWithAlignment(BaseExpr, &BaseInfo, &TBAAInfo);
          QualType PtrTy = BaseExpr->getType()->getPointeeType();
          BaseLV = CGF.MakeAddrLValue(Addr, PtrTy, BaseInfo, TBAAInfo);
        } else {
          BaseLV = CGF.EmitOMPSharedLValue(BaseExpr);
        }
        return BaseLV;
      };
      if (OAShE) {
        LowestElem = LB = Address(CGF.EmitScalarExpr(OAShE->getBase()),
                                  CGF.getContext().getTypeAlignInChars(
                                      OAShE->getBase()->getType()));
      } else if (IsMemberReference) {
        const auto *ME = cast<MemberExpr>(I->getAssociatedExpression());
        LValue BaseLVal = EmitMemberExprBase(CGF, ME);
        LowestElem = CGF.EmitLValueForFieldInitialization(
                            BaseLVal, cast<FieldDecl>(MapDecl))
                         .getAddress(CGF);
        LB = CGF.EmitLoadOfReferenceLValue(LowestElem, MapDecl->getType())
                 .getAddress(CGF);
      } else {
        LowestElem = LB =
            CGF.EmitOMPSharedLValue(I->getAssociatedExpression())
                .getAddress(CGF);
      }

      // If this component is a pointer inside the base struct then we don't
      // need to create any entry for it - it will be combined with the object
      // it is pointing to into a single PTR_AND_OBJ entry.
      bool IsMemberPointerOrAddr =
          EncounteredME &&
          (((IsPointer || ForDeviceAddr) &&
            I->getAssociatedExpression() == EncounteredME) ||
           (IsPrevMemberReference && !IsPointer) ||
           (IsMemberReference && Next != CE &&
            !Next->getAssociatedExpression()->getType()->isPointerType()));
      if (!OverlappedElements.empty() && Next == CE) {
        // Handle base element with the info for overlapped elements.
        assert(!PartialStruct.Base.isValid() && "The base element is set.")((void)0);
        assert(!IsPointer &&((void)0)
               "Unexpected base element with the pointer type.")((void)0);
        // Mark the whole struct as the struct that requires allocation on the
        // device.
        PartialStruct.LowestElem = {0, LowestElem};
        CharUnits TypeSize = CGF.getContext().getTypeSizeInChars(
            I->getAssociatedExpression()->getType());
        Address HB = CGF.Builder.CreateConstGEP(
            CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(LowestElem,
                                                            CGF.VoidPtrTy),
            TypeSize.getQuantity() - 1);
        PartialStruct.HighestElem = {
            std::numeric_limits<decltype(
                PartialStruct.HighestElem.first)>::max(),
            HB};
        PartialStruct.Base = BP;
        PartialStruct.LB = LB;
        assert(((void)0)
            PartialStruct.PreliminaryMapData.BasePointers.empty() &&((void)0)
            "Overlapped elements must be used only once for the variable.")((void)0);
        std::swap(PartialStruct.PreliminaryMapData, CombinedInfo);
        // Emit data for non-overlapped data.
        OpenMPOffloadMappingFlags Flags =
            OMP_MAP_MEMBER_OF |
            getMapTypeBits(MapType, MapModifiers, MotionModifiers, IsImplicit,
                           /*AddPtrFlag=*/false,
                           /*AddIsTargetParamFlag=*/false, IsNonContiguous);
        llvm::Value *Size = nullptr;
        // Do bitcopy of all non-overlapped structure elements.
        for (OMPClauseMappableExprCommon::MappableExprComponentListRef
                 Component : OverlappedElements) {
          Address ComponentLB = Address::invalid();
          for (const OMPClauseMappableExprCommon::MappableComponent &MC :
               Component) {
            if (const ValueDecl *VD = MC.getAssociatedDeclaration()) {
              const auto *FD = dyn_cast<FieldDecl>(VD);
              if (FD && FD->getType()->isLValueReferenceType()) {
                const auto *ME =
                    cast<MemberExpr>(MC.getAssociatedExpression());
                LValue BaseLVal = EmitMemberExprBase(CGF, ME);
                ComponentLB =
                    CGF.EmitLValueForFieldInitialization(BaseLVal, FD)
                        .getAddress(CGF);
              } else {
                ComponentLB =
                    CGF.EmitOMPSharedLValue(MC.getAssociatedExpression())
                        .getAddress(CGF);
              }
              Size = CGF.Builder.CreatePtrDiff(
                  CGF.EmitCastToVoidPtr(ComponentLB.getPointer()),
                  CGF.EmitCastToVoidPtr(LB.getPointer()));
              break;
            }
          }
          assert(Size && "Failed to determine structure size")((void)0);
          CombinedInfo.Exprs.emplace_back(MapDecl, MapExpr);
          CombinedInfo.BasePointers.push_back(BP.getPointer());
          CombinedInfo.Pointers.push_back(LB.getPointer());
          CombinedInfo.Sizes.push_back(CGF.Builder.CreateIntCast(
              Size, CGF.Int64Ty, /*isSigned=*/true));
          CombinedInfo.Types.push_back(Flags);
          CombinedInfo.Mappers.push_back(nullptr);
          CombinedInfo.NonContigInfo.Dims.push_back(IsNonContiguous ? DimSize
                                                                    : 1);
          LB = CGF.Builder.CreateConstGEP(ComponentLB, 1);
        }
        CombinedInfo.Exprs.emplace_back(MapDecl, MapExpr);
        CombinedInfo.BasePointers.push_back(BP.getPointer());
        CombinedInfo.Pointers.push_back(LB.getPointer());
        Size = CGF.Builder.CreatePtrDiff(
            CGF.Builder.CreateConstGEP(HB, 1).getPointer(),
            CGF.EmitCastToVoidPtr(LB.getPointer()));
        CombinedInfo.Sizes.push_back(
            CGF.Builder.CreateIntCast(Size, CGF.Int64Ty, /*isSigned=*/true));
        CombinedInfo.Types.push_back(Flags);
        CombinedInfo.Mappers.push_back(nullptr);
        CombinedInfo.NonContigInfo.Dims.push_back(IsNonContiguous ? DimSize
                                                                  : 1);
        break;
      }
      llvm::Value *Size = getExprTypeSize(I->getAssociatedExpression());
      if (!IsMemberPointerOrAddr ||
          (Next == CE && MapType != OMPC_MAP_unknown)) {
        CombinedInfo.Exprs.emplace_back(MapDecl, MapExpr);
        CombinedInfo.BasePointers.push_back(BP.getPointer());
        CombinedInfo.Pointers.push_back(LB.getPointer());
        CombinedInfo.Sizes.push_back(
            CGF.Builder.CreateIntCast(Size, CGF.Int64Ty, /*isSigned=*/true));
        CombinedInfo.NonContigInfo.Dims.push_back(IsNonContiguous ? DimSize
                                                                  : 1);

        // If Mapper is valid, the last component inherits the mapper.
        bool HasMapper = Mapper && Next == CE;
        CombinedInfo.Mappers.push_back(HasMapper ? Mapper : nullptr);

        // We need to add a pointer flag for each map that comes from the
        // same expression except for the first one. We also need to signal
        // this map is the first one that relates with the current capture
        // (there is a set of entries for each capture).
        OpenMPOffloadMappingFlags Flags = getMapTypeBits(
            MapType, MapModifiers, MotionModifiers, IsImplicit,
            !IsExpressionFirstInfo || RequiresReference ||
                FirstPointerInComplexData || IsMemberReference,
            IsCaptureFirstInfo && !RequiresReference, IsNonContiguous);

        if (!IsExpressionFirstInfo || IsMemberReference) {
          // If we have a PTR_AND_OBJ pair where the OBJ is a pointer as well,
          // then we reset the TO/FROM/ALWAYS/DELETE/CLOSE flags.
          if (IsPointer || (IsMemberReference && Next != CE))
            Flags &= ~(OMP_MAP_TO | OMP_MAP_FROM | OMP_MAP_ALWAYS |
                       OMP_MAP_DELETE | OMP_MAP_CLOSE);

          if (ShouldBeMemberOf) {
            // Set placeholder value MEMBER_OF=FFFF to indicate that the flag
            // should be later updated with the correct value of MEMBER_OF.
            Flags |= OMP_MAP_MEMBER_OF;
            // From now on, all subsequent PTR_AND_OBJ entries should not be
            // marked as MEMBER_OF.
            ShouldBeMemberOf = false;
          }
        }

        CombinedInfo.Types.push_back(Flags);
      }

      // If we have encountered a member expression so far, keep track of the
      // mapped member. If the parent is "*this", then the value declaration
      // is nullptr.
      if (EncounteredME) {
        const auto *FD = cast<FieldDecl>(EncounteredME->getMemberDecl());
        unsigned FieldIndex = FD->getFieldIndex();

        // Update info about the lowest and highest elements for this struct
        if (!PartialStruct.Base.isValid()) {
          PartialStruct.LowestElem = {FieldIndex, LowestElem};
          if (IsFinalArraySection) {
            Address HB =
                CGF.EmitOMPArraySectionExpr(OASE, /*IsLowerBound=*/false)
                    .getAddress(CGF);
            PartialStruct.HighestElem = {FieldIndex, HB};
          } else {
            PartialStruct.HighestElem = {FieldIndex, LowestElem};
          }
          PartialStruct.Base = BP;
          PartialStruct.LB = BP;
        } else if (FieldIndex < PartialStruct.LowestElem.first) {
          PartialStruct.LowestElem = {FieldIndex, LowestElem};
        } else if (FieldIndex > PartialStruct.HighestElem.first) {
          PartialStruct.HighestElem = {FieldIndex, LowestElem};
        }
      }

      // Need to emit combined struct for array sections.
      if (IsFinalArraySection || IsNonContiguous)
        PartialStruct.IsArraySection = true;

      // If we have a final array section, we are done with this expression.
      if (IsFinalArraySection)
        break;

      // The pointer becomes the base for the next element.
      if (Next != CE)
        BP = IsMemberReference ? LowestElem : LB;

      IsExpressionFirstInfo = false;
      IsCaptureFirstInfo = false;
      FirstPointerInComplexData = false;
      IsPrevMemberReference = IsMemberReference;
    } else if (FirstPointerInComplexData) {
      QualType Ty = Components.rbegin()
                        ->getAssociatedDeclaration()
                        ->getType()
                        .getNonReferenceType();
      BP = CGF.EmitLoadOfPointer(BP, Ty->castAs<PointerType>());
      FirstPointerInComplexData = false;
    }
  }
  // If ran into the whole component - allocate the space for the whole
  // record.
  if (!EncounteredME)
    PartialStruct.HasCompleteRecord = true;

  if (!IsNonContiguous)
    return;

  const ASTContext &Context = CGF.getContext();

  // For supporting stride in array section, we need to initialize the first
  // dimension size as 1, first offset as 0, and first count as 1
  MapValuesArrayTy CurOffsets = {llvm::ConstantInt::get(CGF.CGM.Int64Ty, 0)};
  MapValuesArrayTy CurCounts = {llvm::ConstantInt::get(CGF.CGM.Int64Ty, 1)};
  MapValuesArrayTy CurStrides;
  MapValuesArrayTy DimSizes{llvm::ConstantInt::get(CGF.CGM.Int64Ty, 1)};
  uint64_t ElementTypeSize;

  // Collect Size information for each dimension and get the element size as
  // the first Stride. For example, for `int arr[10][10]`, the DimSizes
  // should be [10, 10] and the first stride is 4 btyes.
  for (const OMPClauseMappableExprCommon::MappableComponent &Component :
       Components) {
    const Expr *AssocExpr = Component.getAssociatedExpression();
    const auto *OASE = dyn_cast<OMPArraySectionExpr>(AssocExpr);

    if (!OASE)
      continue;

    QualType Ty = OMPArraySectionExpr::getBaseOriginalType(OASE->getBase());
    auto *CAT = Context.getAsConstantArrayType(Ty);
    auto *VAT = Context.getAsVariableArrayType(Ty);

    // We need all the dimension size except for the last dimension.
    assert((VAT || CAT || &Component == &*Components.begin()) &&((void)0)
           "Should be either ConstantArray or VariableArray if not the "((void)0)
           "first Component")((void)0);

    // Get element size if CurStrides is empty.
    if (CurStrides.empty()) {
      const Type *ElementType = nullptr;
      if (CAT)
        ElementType = CAT->getElementType().getTypePtr();
      else if (VAT)
        ElementType = VAT->getElementType().getTypePtr();
      else
        assert(&Component == &*Components.begin() &&((void)0)
               "Only expect pointer (non CAT or VAT) when this is the "((void)0)
               "first Component")((void)0);
      // If ElementType is null, then it means the base is a pointer
      // (neither CAT nor VAT) and we'll attempt to get ElementType again
      // for next iteration.
      if (ElementType) {
        // For the case that having pointer as base, we need to remove one
        // level of indirection.
        if (&Component != &*Components.begin())
          ElementType = ElementType->getPointeeOrArrayElementType();
        ElementTypeSize =
            Context.getTypeSizeInChars(ElementType).getQuantity();
        CurStrides.push_back(
            llvm::ConstantInt::get(CGF.Int64Ty, ElementTypeSize));
      }
    }
    // Get dimension value except for the last dimension since we don't need
    // it.
    if (DimSizes.size() < Components.size() - 1) {
      if (CAT)
        DimSizes.push_back(llvm::ConstantInt::get(
            CGF.Int64Ty, CAT->getSize().getZExtValue()));
      else if (VAT)
        DimSizes.push_back(CGF.Builder.CreateIntCast(
            CGF.EmitScalarExpr(VAT->getSizeExpr()), CGF.Int64Ty,
            /*IsSigned=*/false));
    }
  }

  // Skip the dummy dimension since we have already have its information.
  auto DI = DimSizes.begin() + 1;
  // Product of dimension.
  llvm::Value *DimProd =
      llvm::ConstantInt::get(CGF.CGM.Int64Ty, ElementTypeSize);

  // Collect info for non-contiguous. Notice that offset, count, and stride
  // are only meaningful for array-section, so we insert a null for anything
  // other than array-section.
  // Also, the size of offset, count, and stride are not the same as
  // pointers, base_pointers, sizes, or dims. Instead, the size of offset,
  // count, and stride are the same as the number of non-contiguous
  // declaration in target update to/from clause.
  for (const OMPClauseMappableExprCommon::MappableComponent &Component :
       Components) {
    const Expr *AssocExpr = Component.getAssociatedExpression();

    if (const auto *AE = dyn_cast<ArraySubscriptExpr>(AssocExpr)) {
      llvm::Value *Offset = CGF.Builder.CreateIntCast(
          CGF.EmitScalarExpr(AE->getIdx()), CGF.Int64Ty,
          /*isSigned=*/false);
      CurOffsets.push_back(Offset);
      CurCounts.push_back(llvm::ConstantInt::get(CGF.Int64Ty, /*V=*/1));
      CurStrides.push_back(CurStrides.back());
      continue;
    }

    const auto *OASE = dyn_cast<OMPArraySectionExpr>(AssocExpr);

    if (!OASE)
      continue;

    // Offset
    const Expr *OffsetExpr = OASE->getLowerBound();
    llvm::Value *Offset = nullptr;
    if (!OffsetExpr) {
      // If offset is absent, then we just set it to zero.
      Offset = llvm::ConstantInt::get(CGF.Int64Ty, 0);
    } else {
      Offset = CGF.Builder.CreateIntCast(CGF.EmitScalarExpr(OffsetExpr),
                                         CGF.Int64Ty,
                                         /*isSigned=*/false);
    }
    CurOffsets.push_back(Offset);

    // Count
    const Expr *CountExpr = OASE->getLength();
    llvm::Value *Count = nullptr;
    if (!CountExpr) {
      // In Clang, once a high dimension is an array section, we construct all
      // the lower dimension as array section, however, for case like
      // arr[0:2][2], Clang construct the inner dimension as an array section
      // but it actually is not in an array section form according to spec.
      if (!OASE->getColonLocFirst().isValid() &&
          !OASE->getColonLocSecond().isValid()) {
        Count = llvm::ConstantInt::get(CGF.Int64Ty, 1);
      } else {
        // OpenMP 5.0, 2.1.5 Array Sections, Description.
        // When the length is absent it defaults to ⌈(size −
        // lower-bound)/stride⌉, where size is the size of the array
        // dimension.
        const Expr *StrideExpr = OASE->getStride();
        llvm::Value *Stride =
            StrideExpr
                ? CGF.Builder.CreateIntCast(CGF.EmitScalarExpr(StrideExpr),
                                            CGF.Int64Ty, /*isSigned=*/false)
                : nullptr;
        if (Stride)
          Count = CGF.Builder.CreateUDiv(
              CGF.Builder.CreateNUWSub(*DI, Offset), Stride);
        else
          Count = CGF.Builder.CreateNUWSub(*DI, Offset);
      }
    } else {
      Count = CGF.EmitScalarExpr(CountExpr);
    }
    Count = CGF.Builder.CreateIntCast(Count, CGF.Int64Ty, /*isSigned=*/false);
    CurCounts.push_back(Count);

    // Stride_n' = Stride_n * (D_0 * D_1 ... * D_n-1) * Unit size
    // Take `int arr[5][5][5]` and `arr[0:2:2][1:2:1][0:2:2]` as an example:
    //              Offset      Count     Stride
    //    D0          0           1         4    (int)    <- dummy dimension
    //    D1          0           2         8    (2 * (1) * 4)
    //    D2          1           2         20   (1 * (1 * 5) * 4)
    //    D3          0           2         200  (2 * (1 * 5 * 4) * 4)
    const Expr *StrideExpr = OASE->getStride();
    llvm::Value *Stride =
        StrideExpr
            ? CGF.Builder.CreateIntCast(CGF.EmitScalarExpr(StrideExpr),
                                        CGF.Int64Ty, /*isSigned=*/false)
            : nullptr;
    DimProd = CGF.Builder.CreateNUWMul(DimProd, *(DI - 1));
    if (Stride)
      CurStrides.push_back(CGF.Builder.CreateNUWMul(DimProd, Stride));
    else
      CurStrides.push_back(DimProd);
    if (DI != DimSizes.end())
      ++DI;
  }

  CombinedInfo.NonContigInfo.Offsets.push_back(CurOffsets);
  CombinedInfo.NonContigInfo.Counts.push_back(CurCounts);
  CombinedInfo.NonContigInfo.Strides.push_back(CurStrides);
}

/// Return the adjusted map modifiers if the declaration a capture refers to
/// appears in a first-private clause. This is expected to be used only with
/// directives that start with 'target'.
MappableExprsHandler::OpenMPOffloadMappingFlags
getMapModifiersForPrivateClauses(const CapturedStmt::Capture &Cap) const {
  assert(Cap.capturesVariable() && "Expected capture by reference only!")((void)0);

  // A first private variable captured by reference will use only the
  // 'private ptr' and 'map to' flag. Return the right flags if the captured
  // declaration is known as first-private in this handler.
  if (FirstPrivateDecls.count(Cap.getCapturedVar())) {
    if (Cap.getCapturedVar()->getType()->isAnyPointerType())
      return MappableExprsHandler::OMP_MAP_TO |
             MappableExprsHandler::OMP_MAP_PTR_AND_OBJ;
    return MappableExprsHandler::OMP_MAP_PRIVATE |
           MappableExprsHandler::OMP_MAP_TO;
  }
  return MappableExprsHandler::OMP_MAP_TO |
         MappableExprsHandler::OMP_MAP_FROM;
}

static OpenMPOffloadMappingFlags getMemberOfFlag(unsigned Position) {
  // Rotate by getFlagMemberOffset() bits.
  return static_cast<OpenMPOffloadMappingFlags>(((uint64_t)Position + 1)
                                                << getFlagMemberOffset());
}

static void setCorrectMemberOfFlag(OpenMPOffloadMappingFlags &Flags,
                                   OpenMPOffloadMappingFlags MemberOfFlag) {
  // If the entry is PTR_AND_OBJ but has not been marked with the special
  // placeholder value 0xFFFF in the MEMBER_OF field, then it should not be
  // marked as MEMBER_OF.
  if ((Flags & OMP_MAP_PTR_AND_OBJ) &&
      ((Flags & OMP_MAP_MEMBER_OF) != OMP_MAP_MEMBER_OF))
    return;

  // Reset the placeholder value to prepare the flag for the assignment of the
  // proper MEMBER_OF value.
  Flags &= ~OMP_MAP_MEMBER_OF;
  Flags |= MemberOfFlag;
}

void getPlainLayout(const CXXRecordDecl *RD,
                    llvm::SmallVectorImpl<const FieldDecl *> &Layout,
                    bool AsBase) const {
  const CGRecordLayout &RL = CGF.getTypes().getCGRecordLayout(RD);

  llvm::StructType *St =
      AsBase ? RL.getBaseSubobjectLLVMType() : RL.getLLVMType();

  unsigned NumElements = St->getNumElements();
  llvm::SmallVector<
      llvm::PointerUnion<const CXXRecordDecl *, const FieldDecl *>, 4>
      RecordLayout(NumElements);

  // Fill bases.
  for (const auto &I : RD->bases()) {
    if (I.isVirtual())
      continue;
    const auto *Base = I.getType()->getAsCXXRecordDecl();
    // Ignore empty bases.
    if (Base->isEmpty() || CGF.getContext()
                               .getASTRecordLayout(Base)
                               .getNonVirtualSize()
                               .isZero())
      continue;

    unsigned FieldIndex = RL.getNonVirtualBaseLLVMFieldNo(Base);
    RecordLayout[FieldIndex] = Base;
  }
  // Fill in virtual bases.
  for (const auto &I : RD->vbases()) {
    const auto *Base = I.getType()->getAsCXXRecordDecl();
    // Ignore empty bases.
    if (Base->isEmpty())
      continue;
    unsigned FieldIndex = RL.getVirtualBaseIndex(Base);
    if (RecordLayout[FieldIndex])
      continue;
    RecordLayout[FieldIndex] = Base;
  }
  // Fill in all the fields.
  assert(!RD->isUnion() && "Unexpected union.")((void)0);
  for (const auto *Field : RD->fields()) {
    // Fill in non-bitfields. (Bitfields always use a zero pattern, which we
    // will fill in later.)
    if (!Field->isBitField() && !Field->isZeroSize(CGF.getContext())) {
      unsigned FieldIndex = RL.getLLVMFieldNo(Field);
      RecordLayout[FieldIndex] = Field;
    }
  }
  for (const llvm::PointerUnion<const CXXRecordDecl *, const FieldDecl *>
           &Data : RecordLayout) {
    if (Data.isNull())
      continue;
    if (const auto *Base = Data.dyn_cast<const CXXRecordDecl *>())
      getPlainLayout(Base, Layout, /*AsBase=*/true);
    else
      Layout.push_back(Data.get<const FieldDecl *>());
  }
}

/// Generate all the base pointers, section pointers, sizes, map types, and
/// mappers for the extracted mappable expressions (all included in \a
/// CombinedInfo). Also, for each item that relates with a device pointer, a
/// pair of the relevant declaration and index where it occurs is appended to
/// the device pointers info array.
void generateAllInfoForClauses(
    ArrayRef<const OMPClause *> Clauses, MapCombinedInfoTy &CombinedInfo,
    const llvm::DenseSet<CanonicalDeclPtr<const Decl>> &SkipVarSet =
        llvm::DenseSet<CanonicalDeclPtr<const Decl>>()) const {
  // We have to process the component lists that relate with the same
  // declaration in a single chunk so that we can generate the map flags
  // correctly. Therefore, we organize all lists in a map.
  enum MapKind { Present, Allocs, Other, Total };
  llvm::MapVector<CanonicalDeclPtr<const Decl>,
                  SmallVector<SmallVector<MapInfo, 8>, 4>>
      Info;

  // Helper function to fill the information map for the different supported
  // clauses.
  auto &&InfoGen =
      [&Info, &SkipVarSet](
          const ValueDecl *D, MapKind Kind,
          OMPClauseMappableExprCommon::MappableExprComponentListRef L,
          OpenMPMapClauseKind MapType,
          ArrayRef<OpenMPMapModifierKind> MapModifiers,
          ArrayRef<OpenMPMotionModifierKind> MotionModifiers,
          bool ReturnDevicePointer, bool IsImplicit, const ValueDecl *Mapper,
          const Expr *VarRef = nullptr, bool ForDeviceAddr = false) {
        if (SkipVarSet.contains(D))
          return;
        auto It = Info.find(D);
        if (It == Info.end())
          It = Info
                   .insert(std::make_pair(
                       D, SmallVector<SmallVector<MapInfo, 8>, 4>(Total)))
                   .first;
        It->second[Kind].emplace_back(
            L, MapType, MapModifiers, MotionModifiers, ReturnDevicePointer,
            IsImplicit, Mapper, VarRef, ForDeviceAddr);
      };

  for (const auto *Cl : Clauses) {
    const auto *C = dyn_cast<OMPMapClause>(Cl);
    if (!C)
      continue;
    MapKind Kind = Other;
    if (!C->getMapTypeModifiers().empty() &&
        llvm::any_of(C->getMapTypeModifiers(), [](OpenMPMapModifierKind K) {
          return K == OMPC_MAP_MODIFIER_present;
        }))
      Kind = Present;
    else if (C->getMapType() == OMPC_MAP_alloc)
      Kind = Allocs;
    const auto *EI = C->getVarRefs().begin();
    for (const auto L : C->component_lists()) {
      const Expr *E = (C->getMapLoc().isValid()) ? *EI : nullptr;
      InfoGen(std::get<0>(L), Kind, std::get<1>(L), C->getMapType(),
              C->getMapTypeModifiers(), llvm::None,
              /*ReturnDevicePointer=*/false, C->isImplicit(), std::get<2>(L),
              E);
      ++EI;
    }
  }
  for (const auto *Cl : Clauses) {
    const auto *C = dyn_cast<OMPToClause>(Cl);
    if (!C)
      continue;
    MapKind Kind = Other;
    if (!C->getMotionModifiers().empty() &&
        llvm::any_of(C->getMotionModifiers(), [](OpenMPMotionModifierKind K) {
          return K == OMPC_MOTION_MODIFIER_present;
        }))
      Kind = Present;
    const auto *EI = C->getVarRefs().begin();
    for (const auto L : C->component_lists()) {
      InfoGen(std::get<0>(L), Kind, std::get<1>(L), OMPC_MAP_to, llvm::None,
              C->getMotionModifiers(), /*ReturnDevicePointer=*/false,
              C->isImplicit(), std::get<2>(L), *EI);
      ++EI;
    }
  }
  for (const auto *Cl : Clauses) {
    const auto *C = dyn_cast<OMPFromClause>(Cl);
    if (!C)
      continue;
    MapKind Kind = Other;
    if (!C->getMotionModifiers().empty() &&
        llvm::any_of(C->getMotionModifiers(), [](OpenMPMotionModifierKind K) {
          return K == OMPC_MOTION_MODIFIER_present;
        }))
      Kind = Present;
    const auto *EI = C->getVarRefs().begin();
    for (const auto L : C->component_lists()) {
      InfoGen(std::get<0>(L), Kind, std::get<1>(L), OMPC_MAP_from, llvm::None,
              C->getMotionModifiers(), /*ReturnDevicePointer=*/false,
              C->isImplicit(), std::get<2>(L), *EI);
      ++EI;
    }
  }

  // Look at the use_device_ptr clause information and mark the existing map
  // entries as such. If there is no map information for an entry in the
  // use_device_ptr list, we create one with map type 'alloc' and zero size
  // section. It is the user fault if that was not mapped before. If there is
  // no map information and the pointer is a struct member, then we defer the
  // emission of that entry until the whole struct has been processed.
  llvm::MapVector<CanonicalDeclPtr<const Decl>,
                  SmallVector<DeferredDevicePtrEntryTy, 4>>
      DeferredInfo;
  MapCombinedInfoTy UseDevicePtrCombinedInfo;

  for (const auto *Cl : Clauses) {
    const auto *C = dyn_cast<OMPUseDevicePtrClause>(Cl);
    if (!C)
      continue;
    for (const auto L : C->component_lists()) {
      OMPClauseMappableExprCommon::MappableExprComponentListRef Components =
          std::get<1>(L);
      assert(!Components.empty() &&((void)0)
             "Not expecting empty list of components!")((void)0);
      const ValueDecl *VD = Components.back().getAssociatedDeclaration();
      VD = cast<ValueDecl>(VD->getCanonicalDecl());
      const Expr *IE = Components.back().getAssociatedExpression();
      // If the first component is a member expression, we have to look into
      // 'this', which maps to null in the map of map information. Otherwise
      // look directly for the information.
      auto It = Info.find(isa<MemberExpr>(IE) ? nullptr : VD);

      // We potentially have map information for this declaration already.
      // Look for the first set of components that refer to it.
      if (It != Info.end()) {
        bool Found = false;
        for (auto &Data : It->second) {
          auto *CI = llvm::find_if(Data, [VD](const MapInfo &MI) {
            return MI.Components.back().getAssociatedDeclaration() == VD;
          });
          // If we found a map entry, signal that the pointer has to be
          // returned and move on to the next declaration. Exclude cases where
          // the base pointer is mapped as array subscript, array section or
          // array shaping. The base address is passed as a pointer to base in
          // this case and cannot be used as a base for use_device_ptr list
          // item.
          if (CI != Data.end()) {
            auto PrevCI = std::next(CI->Components.rbegin());
            const auto *VarD = dyn_cast<VarDecl>(VD);
            if (CGF.CGM.getOpenMPRuntime().hasRequiresUnifiedSharedMemory() ||
                isa<MemberExpr>(IE) ||
                !VD->getType().getNonReferenceType()->isPointerType() ||
                PrevCI == CI->Components.rend() ||
                isa<MemberExpr>(PrevCI->getAssociatedExpression()) || !VarD ||
                VarD->hasLocalStorage()) {
              CI->ReturnDevicePointer = true;
              Found = true;
              break;
            }
          }
        }
        if (Found)
          continue;
      }

      // We didn't find any match in our map information - generate a zero
      // size array section - if the pointer is a struct member we defer this
      // action until the whole struct has been processed.
      if (isa<MemberExpr>(IE)) {
        // Insert the pointer into Info to be processed by
        // generateInfoForComponentList. Because it is a member pointer
        // without a pointee, no entry will be generated for it, therefore
        // we need to generate one after the whole struct has been processed.
        // Nonetheless, generateInfoForComponentList must be called to take
        // the pointer into account for the calculation of the range of the
        // partial struct.
        InfoGen(nullptr, Other, Components, OMPC_MAP_unknown, llvm::None,
                llvm::None, /*ReturnDevicePointer=*/false, C->isImplicit(),
                nullptr);
        DeferredInfo[nullptr].emplace_back(IE, VD, /*ForDeviceAddr=*/false);
      } else {
        llvm::Value *Ptr =
            CGF.EmitLoadOfScalar(CGF.EmitLValue(IE), IE->getExprLoc());
        UseDevicePtrCombinedInfo.Exprs.push_back(VD);
        UseDevicePtrCombinedInfo.BasePointers.emplace_back(Ptr, VD);
        UseDevicePtrCombinedInfo.Pointers.push_back(Ptr);
        UseDevicePtrCombinedInfo.Sizes.push_back(
            llvm::Constant::getNullValue(CGF.Int64Ty));
        UseDevicePtrCombinedInfo.Types.push_back(OMP_MAP_RETURN_PARAM);
        UseDevicePtrCombinedInfo.Mappers.push_back(nullptr);
      }
    }
  }

  // Look at the use_device_addr clause information and mark the existing map
  // entries as such. If there is no map information for an entry in the
  // use_device_addr list, we create one with map type 'alloc' and zero size
  // section. It is the user fault if that was not mapped before. If there is
  // no map information and the pointer is a struct member, then we defer the
  // emission of that entry until the whole struct has been processed.
  llvm::SmallDenseSet<CanonicalDeclPtr<const Decl>, 4> Processed;
  for (const auto *Cl : Clauses) {
    const auto *C = dyn_cast<OMPUseDeviceAddrClause>(Cl);
    if (!C)
      continue;
    for (const auto L : C->component_lists()) {
      assert(!std::get<1>(L).empty() &&((void)0)
             "Not expecting empty list of components!")((void)0);
      const ValueDecl *VD = std::get<1>(L).back().getAssociatedDeclaration();
      if (!Processed.insert(VD).second)
        continue;
      VD = cast<ValueDecl>(VD->getCanonicalDecl());
      const Expr *IE = std::get<1>(L).back().getAssociatedExpression();
      // If the first component is a member expression, we have to look into
      // 'this', which maps to null in the map of map information. Otherwise
      // look directly for the information.
      auto It = Info.find(isa<MemberExpr>(IE) ? nullptr : VD);

      // We potentially have map information for this declaration already.
      // Look for the first set of components that refer to it.
      if (It != Info.end()) {
        bool Found = false;
        for (auto &Data : It->second) {
          auto *CI = llvm::find_if(Data, [VD](const MapInfo &MI) {
            return MI.Components.back().getAssociatedDeclaration() == VD;
          });
          // If we found a map entry, signal that the pointer has to be
          // returned and move on to the next declaration.
          if (CI != Data.end()) {
            CI->ReturnDevicePointer = true;
            Found = true;
            break;
          }
        }
        if (Found)
          continue;
      }

      // We didn't find any match in our map information - generate a zero
      // size array section - if the pointer is a struct member we defer this
      // action until the whole struct has been processed.
      if (isa<MemberExpr>(IE)) {
        // Insert the pointer into Info to be processed by
        // generateInfoForComponentList. Because it is a member pointer
        // without a pointee, no entry will be generated for it, therefore
        // we need to generate one after the whole struct has been processed.
        // Nonetheless, generateInfoForComponentList must be called to take
        // the pointer into account for the calculation of the range of the
        // partial struct.
        InfoGen(nullptr, Other, std::get<1>(L), OMPC_MAP_unknown, llvm::None,
                llvm::None, /*ReturnDevicePointer=*/false, C->isImplicit(),
                nullptr, nullptr, /*ForDeviceAddr=*/true);
        DeferredInfo[nullptr].emplace_back(IE, VD, /*ForDeviceAddr=*/true);
      } else {
        llvm::Value *Ptr;
        if (IE->isGLValue())
          Ptr = CGF.EmitLValue(IE).getPointer(CGF);
        else
          Ptr = CGF.EmitScalarExpr(IE);
        CombinedInfo.Exprs.push_back(VD);
        CombinedInfo.BasePointers.emplace_back(Ptr, VD);
        CombinedInfo.Pointers.push_back(Ptr);
        CombinedInfo.Sizes.push_back(
            llvm::Constant::getNullValue(CGF.Int64Ty));
        CombinedInfo.Types.push_back(OMP_MAP_RETURN_PARAM);
        CombinedInfo.Mappers.push_back(nullptr);
      }
    }
  }

  for (const auto &Data : Info) {
    StructRangeInfoTy PartialStruct;
    // Temporary generated information.
    MapCombinedInfoTy CurInfo;
    const Decl *D = Data.first;
    const ValueDecl *VD = cast_or_null<ValueDecl>(D);
    for (const auto &M : Data.second) {
      for (const MapInfo &L : M) {
        assert(!L.Components.empty() &&((void)0)
               "Not expecting declaration with no component lists.")((void)0);

        // Remember the current base pointer index.
        unsigned CurrentBasePointersIdx = CurInfo.BasePointers.size();
        CurInfo.NonContigInfo.IsNonContiguous =
            L.Components.back().isNonContiguous();
        generateInfoForComponentList(
            L.MapType, L.MapModifiers, L.MotionModifiers, L.Components,
            CurInfo, PartialStruct, /*IsFirstComponentList=*/false,
            L.IsImplicit, L.Mapper, L.ForDeviceAddr, VD, L.VarRef);

        // If this entry relates with a device pointer, set the relevant
        // declaration and add the 'return pointer' flag.
        if (L.ReturnDevicePointer) {
          assert(CurInfo.BasePointers.size() > CurrentBasePointersIdx &&((void)0)
                 "Unexpected number of mapped base pointers.")((void)0);

          const ValueDecl *RelevantVD =
              L.Components.back().getAssociatedDeclaration();
          assert(RelevantVD &&((void)0)
                 "No relevant declaration related with device pointer??")((void)0);

          CurInfo.BasePointers[CurrentBasePointersIdx].setDevicePtrDecl(
              RelevantVD);
          CurInfo.Types[CurrentBasePointersIdx] |= OMP_MAP_RETURN_PARAM;
        }
      }
    }

    // Append any pending zero-length pointers which are struct members and
    // used with use_device_ptr or use_device_addr.
    auto CI = DeferredInfo.find(Data.first);
    if (CI != DeferredInfo.end()) {
      for (const DeferredDevicePtrEntryTy &L : CI->second) {
        llvm::Value *BasePtr;
        llvm::Value *Ptr;
        if (L.ForDeviceAddr) {
          if (L.IE->isGLValue())
            Ptr = this->CGF.EmitLValue(L.IE).getPointer(CGF);
          else
            Ptr = this->CGF.EmitScalarExpr(L.IE);
          BasePtr = Ptr;
          // Entry is RETURN_PARAM. Also, set the placeholder value
          // MEMBER_OF=FFFF so that the entry is later updated with the
          // correct value of MEMBER_OF.
          CurInfo.Types.push_back(OMP_MAP_RETURN_PARAM | OMP_MAP_MEMBER_OF);
        } else {
          BasePtr = this->CGF.EmitLValue(L.IE).getPointer(CGF);
          Ptr = this->CGF.EmitLoadOfScalar(this->CGF.EmitLValue(L.IE),
                                           L.IE->getExprLoc());
          // Entry is PTR_AND_OBJ and RETURN_PARAM. Also, set the
          // placeholder value MEMBER_OF=FFFF so that the entry is later
          // updated with the correct value of MEMBER_OF.
          CurInfo.Types.push_back(OMP_MAP_PTR_AND_OBJ | OMP_MAP_RETURN_PARAM |
                                  OMP_MAP_MEMBER_OF);
        }
        CurInfo.Exprs.push_back(L.VD);
        CurInfo.BasePointers.emplace_back(BasePtr, L.VD);
        CurInfo.Pointers.push_back(Ptr);
        CurInfo.Sizes.push_back(
            llvm::Constant::getNullValue(this->CGF.Int64Ty));
        CurInfo.Mappers.push_back(nullptr);
      }
    }
    // If there is an entry in PartialStruct it means we have a struct with
    // individual members mapped. Emit an extra combined entry.
    if (PartialStruct.Base.isValid()) {
      CurInfo.NonContigInfo.Dims.push_back(0);
      emitCombinedEntry(CombinedInfo, CurInfo.Types, PartialStruct, VD);
    }

    // We need to append the results of this capture to what we already
    // have.
    CombinedInfo.append(CurInfo);
  }
  // Append data for use_device_ptr clauses.
  CombinedInfo.append(UseDevicePtrCombinedInfo);
}

8847public:
MappableExprsHandler(const OMPExecutableDirective &Dir, CodeGenFunction &CGF)
    : CurDir(&Dir), CGF(CGF) {
  // Extract firstprivate clause information.
  for (const auto *C : Dir.getClausesOfKind<OMPFirstprivateClause>())
    for (const auto *D : C->varlists())
      FirstPrivateDecls.try_emplace(
          cast<VarDecl>(cast<DeclRefExpr>(D)->getDecl()), C->isImplicit());
  // Extract implicit firstprivates from uses_allocators clauses.
  for (const auto *C : Dir.getClausesOfKind<OMPUsesAllocatorsClause>()) {
    for (unsigned I = 0, E = C->getNumberOfAllocators(); I < E; ++I) {
      OMPUsesAllocatorsClause::Data D = C->getAllocatorData(I);
      if (const auto *DRE = dyn_cast_or_null<DeclRefExpr>(D.AllocatorTraits))
        FirstPrivateDecls.try_emplace(cast<VarDecl>(DRE->getDecl()),
                                      /*Implicit=*/true);
      else if (const auto *VD = dyn_cast<VarDecl>(
                   cast<DeclRefExpr>(D.Allocator->IgnoreParenImpCasts())
                       ->getDecl()))
        FirstPrivateDecls.try_emplace(VD, /*Implicit=*/true);
    }
  }
  // Extract device pointer clause information.
  for (const auto *C : Dir.getClausesOfKind<OMPIsDevicePtrClause>())
    for (auto L : C->component_lists())
      DevPointersMap[std::get<0>(L)].push_back(std::get<1>(L));
}

/// Constructor for the declare mapper directive.
MappableExprsHandler(const OMPDeclareMapperDecl &Dir, CodeGenFunction &CGF)
    : CurDir(&Dir), CGF(CGF) {}

/// Generate code for the combined entry if we have a partially mapped struct
/// and take care of the mapping flags of the arguments corresponding to
/// individual struct members.
void emitCombinedEntry(MapCombinedInfoTy &CombinedInfo,
                       MapFlagsArrayTy &CurTypes,
                       const StructRangeInfoTy &PartialStruct,
                       const ValueDecl *VD = nullptr,
                       bool NotTargetParams = true) const {
  if (CurTypes.size() == 1 &&
      ((CurTypes.back() & OMP_MAP_MEMBER_OF) != OMP_MAP_MEMBER_OF) &&
      !PartialStruct.IsArraySection)
    return;
  Address LBAddr = PartialStruct.LowestElem.second;
  Address HBAddr = PartialStruct.HighestElem.second;
  if (PartialStruct.HasCompleteRecord) {
    LBAddr = PartialStruct.LB;
    HBAddr = PartialStruct.LB;
  }
  CombinedInfo.Exprs.push_back(VD);
  // Base is the base of the struct
  CombinedInfo.BasePointers.push_back(PartialStruct.Base.getPointer());
  // Pointer is the address of the lowest element
  llvm::Value *LB = LBAddr.getPointer();
  CombinedInfo.Pointers.push_back(LB);
  // There should not be a mapper for a combined entry.
  CombinedInfo.Mappers.push_back(nullptr);
  // Size is (addr of {highest+1} element) - (addr of lowest element)
  llvm::Value *HB = HBAddr.getPointer();
  llvm::Value *HAddr =
      CGF.Builder.CreateConstGEP1_32(HBAddr.getElementType(), HB, /*Idx0=*/1);
  llvm::Value *CLAddr = CGF.Builder.CreatePointerCast(LB, CGF.VoidPtrTy);
  llvm::Value *CHAddr = CGF.Builder.CreatePointerCast(HAddr, CGF.VoidPtrTy);
  llvm::Value *Diff = CGF.Builder.CreatePtrDiff(CHAddr, CLAddr);
  llvm::Value *Size = CGF.Builder.CreateIntCast(Diff, CGF.Int64Ty,
                                                /*isSigned=*/false);
  CombinedInfo.Sizes.push_back(Size);
  // Map type is always TARGET_PARAM, if generate info for captures.
  CombinedInfo.Types.push_back(NotTargetParams ? OMP_MAP_NONE
                                               : OMP_MAP_TARGET_PARAM);
  // If any element has the present modifier, then make sure the runtime
  // doesn't attempt to allocate the struct.
  if (CurTypes.end() !=
      llvm::find_if(CurTypes, [](OpenMPOffloadMappingFlags Type) {
        return Type & OMP_MAP_PRESENT;
      }))
    CombinedInfo.Types.back() |= OMP_MAP_PRESENT;
  // Remove TARGET_PARAM flag from the first element
  (*CurTypes.begin()) &= ~OMP_MAP_TARGET_PARAM;

  // All other current entries will be MEMBER_OF the combined entry
  // (except for PTR_AND_OBJ entries which do not have a placeholder value
  // 0xFFFF in the MEMBER_OF field).
  OpenMPOffloadMappingFlags MemberOfFlag =
      getMemberOfFlag(CombinedInfo.BasePointers.size() - 1);
  for (auto &M : CurTypes)
    setCorrectMemberOfFlag(M, MemberOfFlag);
}

/// Generate all the base pointers, section pointers, sizes, map types, and
/// mappers for the extracted mappable expressions (all included in \a
/// CombinedInfo). Also, for each item that relates with a device pointer, a
/// pair of the relevant declaration and index where it occurs is appended to
/// the device pointers info array.
void generateAllInfo(
    MapCombinedInfoTy &CombinedInfo,
    const llvm::DenseSet<CanonicalDeclPtr<const Decl>> &SkipVarSet =
        llvm::DenseSet<CanonicalDeclPtr<const Decl>>()) const {
  assert(CurDir.is<const OMPExecutableDirective *>() &&((void)0)
         "Expect a executable directive")((void)0);
  const auto *CurExecDir = CurDir.get<const OMPExecutableDirective *>();
  generateAllInfoForClauses(CurExecDir->clauses(), CombinedInfo, SkipVarSet);
}

/// Generate all the base pointers, section pointers, sizes, map types, and
/// mappers for the extracted map clauses of user-defined mapper (all included
/// in \a CombinedInfo).
void generateAllInfoForMapper(MapCombinedInfoTy &CombinedInfo) const {
  assert(CurDir.is<const OMPDeclareMapperDecl *>() &&((void)0)
         "Expect a declare mapper directive")((void)0);
  const auto *CurMapperDir = CurDir.get<const OMPDeclareMapperDecl *>();
  generateAllInfoForClauses(CurMapperDir->clauses(), CombinedInfo);
}

/// Emit capture info for lambdas for variables captured by reference.
void generateInfoForLambdaCaptures(
    const ValueDecl *VD, llvm::Value *Arg, MapCombinedInfoTy &CombinedInfo,
    llvm::DenseMap<llvm::Value *, llvm::Value *> &LambdaPointers) const {
  const auto *RD = VD->getType()
                       .getCanonicalType()
                       .getNonReferenceType()
                       ->getAsCXXRecordDecl();
  if (!RD || !RD->isLambda())
    return;
  Address VDAddr = Address(Arg, CGF.getContext().getDeclAlign(VD));
  LValue VDLVal = CGF.MakeAddrLValue(
      VDAddr, VD->getType().getCanonicalType().getNonReferenceType());
  llvm::DenseMap<const VarDecl *, FieldDecl *> Captures;
  FieldDecl *ThisCapture = nullptr;
  RD->getCaptureFields(Captures, ThisCapture);
  if (ThisCapture) {
    LValue ThisLVal =
        CGF.EmitLValueForFieldInitialization(VDLVal, ThisCapture);
    LValue ThisLValVal = CGF.EmitLValueForField(VDLVal, ThisCapture);
    LambdaPointers.try_emplace(ThisLVal.getPointer(CGF),
                               VDLVal.getPointer(CGF));
    CombinedInfo.Exprs.push_back(VD);
    CombinedInfo.BasePointers.push_back(ThisLVal.getPointer(CGF));
    CombinedInfo.Pointers.push_back(ThisLValVal.getPointer(CGF));
    CombinedInfo.Sizes.push_back(
        CGF.Builder.CreateIntCast(CGF.getTypeSize(CGF.getContext().VoidPtrTy),
                                  CGF.Int64Ty, /*isSigned=*/true));
    CombinedInfo.Types.push_back(OMP_MAP_PTR_AND_OBJ | OMP_MAP_LITERAL |
                                 OMP_MAP_MEMBER_OF | OMP_MAP_IMPLICIT);
    CombinedInfo.Mappers.push_back(nullptr);
  }
  for (const LambdaCapture &LC : RD->captures()) {
    if (!LC.capturesVariable())
      continue;
    const VarDecl *VD = LC.getCapturedVar();
    if (LC.getCaptureKind() != LCK_ByRef && !VD->getType()->isPointerType())
      continue;
    auto It = Captures.find(VD);
    assert(It != Captures.end() && "Found lambda capture without field.")((void)0);
    LValue VarLVal = CGF.EmitLValueForFieldInitialization(VDLVal, It->second);
    if (LC.getCaptureKind() == LCK_ByRef) {
      LValue VarLValVal = CGF.EmitLValueForField(VDLVal, It->second);
      LambdaPointers.try_emplace(VarLVal.getPointer(CGF),
                                 VDLVal.getPointer(CGF));
      CombinedInfo.Exprs.push_back(VD);
      CombinedInfo.BasePointers.push_back(VarLVal.getPointer(CGF));
      CombinedInfo.Pointers.push_back(VarLValVal.getPointer(CGF));
      CombinedInfo.Sizes.push_back(CGF.Builder.CreateIntCast(
          CGF.getTypeSize(
              VD->getType().getCanonicalType().getNonReferenceType()),
          CGF.Int64Ty, /*isSigned=*/true));
    } else {
      RValue VarRVal = CGF.EmitLoadOfLValue(VarLVal, RD->getLocation());
      LambdaPointers.try_emplace(VarLVal.getPointer(CGF),
                                 VDLVal.getPointer(CGF));
      CombinedInfo.Exprs.push_back(VD);
      CombinedInfo.BasePointers.push_back(VarLVal.getPointer(CGF));
      CombinedInfo.Pointers.push_back(VarRVal.getScalarVal());
      CombinedInfo.Sizes.push_back(llvm::ConstantInt::get(CGF.Int64Ty, 0));
    }
    CombinedInfo.Types.push_back(OMP_MAP_PTR_AND_OBJ | OMP_MAP_LITERAL |
                                 OMP_MAP_MEMBER_OF | OMP_MAP_IMPLICIT);
    CombinedInfo.Mappers.push_back(nullptr);
  }
}

/// Set correct indices for lambdas captures.
void adjustMemberOfForLambdaCaptures(
    const llvm::DenseMap<llvm::Value *, llvm::Value *> &LambdaPointers,
    MapBaseValuesArrayTy &BasePointers, MapValuesArrayTy &Pointers,
    MapFlagsArrayTy &Types) const {
  for (unsigned I = 0, E = Types.size(); I < E; ++I) {
    // Set correct member_of idx for all implicit lambda captures.
    if (Types[I] != (OMP_MAP_PTR_AND_OBJ | OMP_MAP_LITERAL |
                     OMP_MAP_MEMBER_OF | OMP_MAP_IMPLICIT))
      continue;
    llvm::Value *BasePtr = LambdaPointers.lookup(*BasePointers[I]);
    assert(BasePtr && "Unable to find base lambda address.")((void)0);
    int TgtIdx = -1;
    for (unsigned J = I; J > 0; --J) {
      unsigned Idx = J - 1;
      if (Pointers[Idx] != BasePtr)
        continue;
      TgtIdx = Idx;
      break;
    }
    assert(TgtIdx != -1 && "Unable to find parent lambda.")((void)0);
    // All other current entries will be MEMBER_OF the combined entry
    // (except for PTR_AND_OBJ entries which do not have a placeholder value
    // 0xFFFF in the MEMBER_OF field).
    OpenMPOffloadMappingFlags MemberOfFlag = getMemberOfFlag(TgtIdx);
    setCorrectMemberOfFlag(Types[I], MemberOfFlag);
  }
}

/// Generate the base pointers, section pointers, sizes, map types, and
/// mappers associated to a given capture (all included in \a CombinedInfo).
void generateInfoForCapture(const CapturedStmt::Capture *Cap,
                            llvm::Value *Arg, MapCombinedInfoTy &CombinedInfo,
                            StructRangeInfoTy &PartialStruct) const {
  assert(!Cap->capturesVariableArrayType() &&((void)0)
         "Not expecting to generate map info for a variable array type!")((void)0);

  // We need to know when we generating information for the first component
  const ValueDecl *VD = Cap->capturesThis()
                            ? nullptr
                            : Cap->getCapturedVar()->getCanonicalDecl();

  // If this declaration appears in a is_device_ptr clause we just have to
  // pass the pointer by value. If it is a reference to a declaration, we just
  // pass its value.
  if (DevPointersMap.count(VD)) {
    CombinedInfo.Exprs.push_back(VD);
    CombinedInfo.BasePointers.emplace_back(Arg, VD);
    CombinedInfo.Pointers.push_back(Arg);
    CombinedInfo.Sizes.push_back(CGF.Builder.CreateIntCast(
        CGF.getTypeSize(CGF.getContext().VoidPtrTy), CGF.Int64Ty,
        /*isSigned=*/true));
    CombinedInfo.Types.push_back(
        (Cap->capturesVariable() ? OMP_MAP_TO : OMP_MAP_LITERAL) |
        OMP_MAP_TARGET_PARAM);
    CombinedInfo.Mappers.push_back(nullptr);
    return;
  }

  using MapData =
      std::tuple<OMPClauseMappableExprCommon::MappableExprComponentListRef,
                 OpenMPMapClauseKind, ArrayRef<OpenMPMapModifierKind>, bool,
                 const ValueDecl *, const Expr *>;
  SmallVector<MapData, 4> DeclComponentLists;
  assert(CurDir.is<const OMPExecutableDirective *>() &&((void)0)
         "Expect a executable directive")((void)0);
  const auto *CurExecDir = CurDir.get<const OMPExecutableDirective *>();
  for (const auto *C : CurExecDir->getClausesOfKind<OMPMapClause>()) {
    const auto *EI = C->getVarRefs().begin();
    for (const auto L : C->decl_component_lists(VD)) {
      const ValueDecl *VDecl, *Mapper;
      // The Expression is not correct if the mapping is implicit
      const Expr *E = (C->getMapLoc().isValid()) ? *EI : nullptr;
      OMPClauseMappableExprCommon::MappableExprComponentListRef Components;
      std::tie(VDecl, Components, Mapper) = L;
      assert(VDecl == VD && "We got information for the wrong declaration??")((void)0);
      assert(!Components.empty() &&((void)0)
             "Not expecting declaration with no component lists.")((void)0);
      DeclComponentLists.emplace_back(Components, C->getMapType(),
                                      C->getMapTypeModifiers(),
                                      C->isImplicit(), Mapper, E);
      ++EI;
    }
  }
  llvm::stable_sort(DeclComponentLists, [](const MapData &LHS,
                                           const MapData &RHS) {
    ArrayRef<OpenMPMapModifierKind> MapModifiers = std::get<2>(LHS);
    OpenMPMapClauseKind MapType = std::get<1>(RHS);
    bool HasPresent = !MapModifiers.empty() &&
                      llvm::any_of(MapModifiers, [](OpenMPMapModifierKind K) {
                        return K == clang::OMPC_MAP_MODIFIER_present;
                      });
    bool HasAllocs = MapType == OMPC_MAP_alloc;
    MapModifiers = std::get<2>(RHS);
    MapType = std::get<1>(LHS);
    bool HasPresentR =
        !MapModifiers.empty() &&
        llvm::any_of(MapModifiers, [](OpenMPMapModifierKind K) {
          return K == clang::OMPC_MAP_MODIFIER_present;
        });
    bool HasAllocsR = MapType == OMPC_MAP_alloc;
    return (HasPresent && !HasPresentR) || (HasAllocs && !HasAllocsR);
  });

  // Find overlapping elements (including the offset from the base element).
  llvm::SmallDenseMap<
      const MapData *,
      llvm::SmallVector<
          OMPClauseMappableExprCommon::MappableExprComponentListRef, 4>,
      4>
      OverlappedData;
  size_t Count = 0;
  for (const MapData &L : DeclComponentLists) {
    OMPClauseMappableExprCommon::MappableExprComponentListRef Components;
    OpenMPMapClauseKind MapType;
    ArrayRef<OpenMPMapModifierKind> MapModifiers;
    bool IsImplicit;
    const ValueDecl *Mapper;
    const Expr *VarRef;
    std::tie(Components, MapType, MapModifiers, IsImplicit, Mapper, VarRef) =
        L;
    ++Count;
    for (const MapData &L1 : makeArrayRef(DeclComponentLists).slice(Count)) {
      OMPClauseMappableExprCommon::MappableExprComponentListRef Components1;
      std::tie(Components1, MapType, MapModifiers, IsImplicit, Mapper,
               VarRef) = L1;
      auto CI = Components.rbegin();
      auto CE = Components.rend();
      auto SI = Components1.rbegin();
      auto SE = Components1.rend();
      for (; CI != CE && SI != SE; ++CI, ++SI) {
        if (CI->getAssociatedExpression()->getStmtClass() !=
            SI->getAssociatedExpression()->getStmtClass())
          break;
        // Are we dealing with different variables/fields?
        if (CI->getAssociatedDeclaration() != SI->getAssociatedDeclaration())
          break;
      }
      // Found overlapping if, at least for one component, reached the head
      // of the components list.
      if (CI == CE || SI == SE) {
        // Ignore it if it is the same component.
        if (CI == CE && SI == SE)
          continue;
        const auto It = (SI == SE) ? CI : SI;
        // If one component is a pointer and another one is a kind of
        // dereference of this pointer (array subscript, section, dereference,
        // etc.), it is not an overlapping.
        // Same, if one component is a base and another component is a
        // dereferenced pointer memberexpr with the same base.
        if (!isa<MemberExpr>(It->getAssociatedExpression()) ||
            (std::prev(It)->getAssociatedDeclaration() &&
             std::prev(It)
                 ->getAssociatedDeclaration()
                 ->getType()
                 ->isPointerType()) ||
            (It->getAssociatedDeclaration() &&
             It->getAssociatedDeclaration()->getType()->isPointerType() &&
             std::next(It) != CE && std::next(It) != SE))
          continue;
        const MapData &BaseData = CI == CE ? L : L1;
        OMPClauseMappableExprCommon::MappableExprComponentListRef SubData =
            SI == SE ? Components : Components1;
        auto &OverlappedElements = OverlappedData.FindAndConstruct(&BaseData);
        OverlappedElements.getSecond().push_back(SubData);
      }
    }
  }
  // Sort the overlapped elements for each item.
  llvm::SmallVector<const FieldDecl *, 4> Layout;
  if (!OverlappedData.empty()) {
    const Type *BaseType = VD->getType().getCanonicalType().getTypePtr();
    const Type *OrigType = BaseType->getPointeeOrArrayElementType();
    while (BaseType != OrigType) {
      BaseType = OrigType->getCanonicalTypeInternal().getTypePtr();
      OrigType = BaseType->getPointeeOrArrayElementType();
    }

    if (const auto *CRD = BaseType->getAsCXXRecordDecl())
      getPlainLayout(CRD, Layout, /*AsBase=*/false);
    else {
      const auto *RD = BaseType->getAsRecordDecl();
      Layout.append(RD->field_begin(), RD->field_end());
    }
  }
  for (auto &Pair : OverlappedData) {
    llvm::stable_sort(
        Pair.getSecond(),
        [&Layout](
            OMPClauseMappableExprCommon::MappableExprComponentListRef First,
            OMPClauseMappableExprCommon::MappableExprComponentListRef
                Second) {
          auto CI = First.rbegin();
          auto CE = First.rend();
          auto SI = Second.rbegin();
          auto SE = Second.rend();
          for (; CI != CE && SI != SE; ++CI, ++SI) {
            if (CI->getAssociatedExpression()->getStmtClass() !=
                SI->getAssociatedExpression()->getStmtClass())
              break;
            // Are we dealing with different variables/fields?
            if (CI->getAssociatedDeclaration() !=
                SI->getAssociatedDeclaration())
              break;
          }

          // Lists contain the same elements.
          if (CI == CE && SI == SE)
            return false;

          // List with less elements is less than list with more elements.
          if (CI == CE || SI == SE)
            return CI == CE;

          const auto *FD1 = cast<FieldDecl>(CI->getAssociatedDeclaration());
          const auto *FD2 = cast<FieldDecl>(SI->getAssociatedDeclaration());
          if (FD1->getParent() == FD2->getParent())
            return FD1->getFieldIndex() < FD2->getFieldIndex();
          const auto *It =
              llvm::find_if(Layout, [FD1, FD2](const FieldDecl *FD) {
                return FD == FD1 || FD == FD2;
              });
          return *It == FD1;
        });
  }

  // Associated with a capture, because the mapping flags depend on it.
  // Go through all of the elements with the overlapped elements.
  bool IsFirstComponentList = true;
  for (const auto &Pair : OverlappedData) {
    const MapData &L = *Pair.getFirst();
    OMPClauseMappableExprCommon::MappableExprComponentListRef Components;
    OpenMPMapClauseKind MapType;
    ArrayRef<OpenMPMapModifierKind> MapModifiers;
    bool IsImplicit;
    const ValueDecl *Mapper;
    const Expr *VarRef;
    std::tie(Components, MapType, MapModifiers, IsImplicit, Mapper, VarRef) =
        L;
    ArrayRef<OMPClauseMappableExprCommon::MappableExprComponentListRef>
        OverlappedComponents = Pair.getSecond();
    generateInfoForComponentList(
        MapType, MapModifiers, llvm::None, Components, CombinedInfo,
        PartialStruct, IsFirstComponentList, IsImplicit, Mapper,
        /*ForDeviceAddr=*/false, VD, VarRef, OverlappedComponents);
    IsFirstComponentList = false;
  }
  // Go through other elements without overlapped elements.
  for (const MapData &L : DeclComponentLists) {
    OMPClauseMappableExprCommon::MappableExprComponentListRef Components;
    OpenMPMapClauseKind MapType;
    ArrayRef<OpenMPMapModifierKind> MapModifiers;
    bool IsImplicit;
    const ValueDecl *Mapper;
    const Expr *VarRef;
    std::tie(Components, MapType, MapModifiers, IsImplicit, Mapper, VarRef) =
        L;
    auto It = OverlappedData.find(&L);
    if (It == OverlappedData.end())
      generateInfoForComponentList(MapType, MapModifiers, llvm::None,
                                   Components, CombinedInfo, PartialStruct,
                                   IsFirstComponentList, IsImplicit, Mapper,
                                   /*ForDeviceAddr=*/false, VD, VarRef);
    IsFirstComponentList = false;
  }
}

/// Generate the default map information for a given capture \a CI,
/// record field declaration \a RI and captured value \a CV.
void generateDefaultMapInfo(const CapturedStmt::Capture &CI,
                            const FieldDecl &RI, llvm::Value *CV,
                            MapCombinedInfoTy &CombinedInfo) const {
  bool IsImplicit = true;
  // Do the default mapping.
  if (CI.capturesThis()) {
    CombinedInfo.Exprs.push_back(nullptr);
    CombinedInfo.BasePointers.push_back(CV);
    CombinedInfo.Pointers.push_back(CV);
    const auto *PtrTy = cast<PointerType>(RI.getType().getTypePtr());
    CombinedInfo.Sizes.push_back(
        CGF.Builder.CreateIntCast(CGF.getTypeSize(PtrTy->getPointeeType()),
                                  CGF.Int64Ty, /*isSigned=*/true));
    // Default map type.
    CombinedInfo.Types.push_back(OMP_MAP_TO | OMP_MAP_FROM);
  } else if (CI.capturesVariableByCopy()) {
    const VarDecl *VD = CI.getCapturedVar();
    CombinedInfo.Exprs.push_back(VD->getCanonicalDecl());
    CombinedInfo.BasePointers.push_back(CV);
    CombinedInfo.Pointers.push_back(CV);
    if (!RI.getType()->isAnyPointerType()) {
      // We have to signal to the runtime captures passed by value that are
      // not pointers.
      CombinedInfo.Types.push_back(OMP_MAP_LITERAL);
      CombinedInfo.Sizes.push_back(CGF.Builder.CreateIntCast(
          CGF.getTypeSize(RI.getType()), CGF.Int64Ty, /*isSigned=*/true));
    } else {
      // Pointers are implicitly mapped with a zero size and no flags
      // (other than first map that is added for all implicit maps).
      CombinedInfo.Types.push_back(OMP_MAP_NONE);
      CombinedInfo.Sizes.push_back(llvm::Constant::getNullValue(CGF.Int64Ty));
    }
    auto I = FirstPrivateDecls.find(VD);
    if (I != FirstPrivateDecls.end())
      IsImplicit = I->getSecond();
  } else {
    assert(CI.capturesVariable() && "Expected captured reference.")((void)0);
    const auto *PtrTy = cast<ReferenceType>(RI.getType().getTypePtr());
    QualType ElementType = PtrTy->getPointeeType();
    CombinedInfo.Sizes.push_back(CGF.Builder.CreateIntCast(
        CGF.getTypeSize(ElementType), CGF.Int64Ty, /*isSigned=*/true));
    // The default map type for a scalar/complex type is 'to' because by
    // default the value doesn't have to be retrieved. For an aggregate
    // type, the default is 'tofrom'.
    CombinedInfo.Types.push_back(getMapModifiersForPrivateClauses(CI));
    const VarDecl *VD = CI.getCapturedVar();
    auto I = FirstPrivateDecls.find(VD);
    CombinedInfo.Exprs.push_back(VD->getCanonicalDecl());
    CombinedInfo.BasePointers.push_back(CV);
    if (I != FirstPrivateDecls.end() && ElementType->isAnyPointerType()) {
      Address PtrAddr = CGF.EmitLoadOfReference(CGF.MakeAddrLValue(
          CV, ElementType, CGF.getContext().getDeclAlign(VD),
          AlignmentSource::Decl));
      CombinedInfo.Pointers.push_back(PtrAddr.getPointer());
    } else {
      CombinedInfo.Pointers.push_back(CV);
    }
    if (I != FirstPrivateDecls.end())
      IsImplicit = I->getSecond();
  }
  // Every default map produces a single argument which is a target parameter.
  CombinedInfo.Types.back() |= OMP_MAP_TARGET_PARAM;

  // Add flag stating this is an implicit map.
  if (IsImplicit)
    CombinedInfo.Types.back() |= OMP_MAP_IMPLICIT;

  // No user-defined mapper for default mapping.
  CombinedInfo.Mappers.push_back(nullptr);
}
9367};
9368} // anonymous namespace

9370static void emitNonContiguousDescriptor(
  CodeGenFunction &CGF, MappableExprsHandler::MapCombinedInfoTy &CombinedInfo,
  CGOpenMPRuntime::TargetDataInfo &Info) {
CodeGenModule &CGM = CGF.CGM;
MappableExprsHandler::MapCombinedInfoTy::StructNonContiguousInfo
    &NonContigInfo = CombinedInfo.NonContigInfo;

// Build an array of struct descriptor_dim and then assign it to
// offload_args.
//
// struct descriptor_dim {
//  uint64_t offset;
//  uint64_t count;
//  uint64_t stride
// };
ASTContext &C = CGF.getContext();
QualType Int64Ty = C.getIntTypeForBitwidth(/*DestWidth=*/64, /*Signed=*/0);
RecordDecl *RD;
RD = C.buildImplicitRecord("descriptor_dim");
RD->startDefinition();
addFieldToRecordDecl(C, RD, Int64Ty);
addFieldToRecordDecl(C, RD, Int64Ty);
addFieldToRecordDecl(C, RD, Int64Ty);
RD->completeDefinition();
QualType DimTy = C.getRecordType(RD);

enum { OffsetFD = 0, CountFD, StrideFD };
// We need two index variable here since the size of "Dims" is the same as the
// size of Components, however, the size of offset, count, and stride is equal
// to the size of base declaration that is non-contiguous.
for (unsigned I = 0, L = 0, E = NonContigInfo.Dims.size(); I < E; ++I) {
  // Skip emitting ir if dimension size is 1 since it cannot be
  // non-contiguous.
  if (NonContigInfo.Dims[I] == 1)
    continue;
  llvm::APInt Size(/*numBits=*/32, NonContigInfo.Dims[I]);
  QualType ArrayTy =
      C.getConstantArrayType(DimTy, Size, nullptr, ArrayType::Normal, 0);
  Address DimsAddr = CGF.CreateMemTemp(ArrayTy, "dims");
  for (unsigned II = 0, EE = NonContigInfo.Dims[I]; II < EE; ++II) {
    unsigned RevIdx = EE - II - 1;
    LValue DimsLVal = CGF.MakeAddrLValue(
        CGF.Builder.CreateConstArrayGEP(DimsAddr, II), DimTy);
    // Offset
    LValue OffsetLVal = CGF.EmitLValueForField(
        DimsLVal, *std::next(RD->field_begin(), OffsetFD));
    CGF.EmitStoreOfScalar(NonContigInfo.Offsets[L][RevIdx], OffsetLVal);
    // Count
    LValue CountLVal = CGF.EmitLValueForField(
        DimsLVal, *std::next(RD->field_begin(), CountFD));
    CGF.EmitStoreOfScalar(NonContigInfo.Counts[L][RevIdx], CountLVal);
    // Stride
    LValue StrideLVal = CGF.EmitLValueForField(
        DimsLVal, *std::next(RD->field_begin(), StrideFD));
    CGF.EmitStoreOfScalar(NonContigInfo.Strides[L][RevIdx], StrideLVal);
  }
  // args[I] = &dims
  Address DAddr = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
      DimsAddr, CGM.Int8PtrTy);
  llvm::Value *P = CGF.Builder.CreateConstInBoundsGEP2_32(
      llvm::ArrayType::get(CGM.VoidPtrTy, Info.NumberOfPtrs),
      Info.PointersArray, 0, I);
  Address PAddr(P, CGF.getPointerAlign());
  CGF.Builder.CreateStore(DAddr.getPointer(), PAddr);
  ++L;
}
9436}

9438/// Emit a string constant containing the names of the values mapped to the
9439/// offloading runtime library.
9440llvm::Constant *
9441emitMappingInformation(CodeGenFunction &CGF, llvm::OpenMPIRBuilder &OMPBuilder,
                     MappableExprsHandler::MappingExprInfo &MapExprs) {
llvm::Constant *SrcLocStr;
if (!MapExprs.getMapDecl()) {
  SrcLocStr = OMPBuilder.getOrCreateDefaultSrcLocStr();
} else {
  std::string ExprName = "";
  if (MapExprs.getMapExpr()) {
    PrintingPolicy P(CGF.getContext().getLangOpts());
    llvm::raw_string_ostream OS(ExprName);
    MapExprs.getMapExpr()->printPretty(OS, nullptr, P);
    OS.flush();
  } else {
    ExprName = MapExprs.getMapDecl()->getNameAsString();
  }

  SourceLocation Loc = MapExprs.getMapDecl()->getLocation();
  PresumedLoc PLoc = CGF.getContext().getSourceManager().getPresumedLoc(Loc);
  const char *FileName = PLoc.getFilename();
  unsigned Line = PLoc.getLine();
  unsigned Column = PLoc.getColumn();
  SrcLocStr = OMPBuilder.getOrCreateSrcLocStr(FileName, ExprName.c_str(),
                                              Line, Column);
}
return SrcLocStr;
9466}

9468/// Emit the arrays used to pass the captures and map information to the
9469/// offloading runtime library. If there is no map or capture information,
9470/// return nullptr by reference.
9471static void emitOffloadingArrays(
  CodeGenFunction &CGF, MappableExprsHandler::MapCombinedInfoTy &CombinedInfo,
  CGOpenMPRuntime::TargetDataInfo &Info, llvm::OpenMPIRBuilder &OMPBuilder,
  bool IsNonContiguous = false) {
CodeGenModule &CGM = CGF.CGM;
ASTContext &Ctx = CGF.getContext();

// Reset the array information.
Info.clearArrayInfo();
Info.NumberOfPtrs = CombinedInfo.BasePointers.size();

if (Info.NumberOfPtrs) {
  // Detect if we have any capture size requiring runtime evaluation of the
  // size so that a constant array could be eventually used.
  bool hasRuntimeEvaluationCaptureSize = false;
  for (llvm::Value *S : CombinedInfo.Sizes)
    if (!isa<llvm::Constant>(S)) {
      hasRuntimeEvaluationCaptureSize = true;
      break;
    }

  llvm::APInt PointerNumAP(32, Info.NumberOfPtrs, /*isSigned=*/true);
  QualType PointerArrayType = Ctx.getConstantArrayType(
      Ctx.VoidPtrTy, PointerNumAP, nullptr, ArrayType::Normal,
      /*IndexTypeQuals=*/0);

  Info.BasePointersArray =
      CGF.CreateMemTemp(PointerArrayType, ".offload_baseptrs").getPointer();
  Info.PointersArray =
      CGF.CreateMemTemp(PointerArrayType, ".offload_ptrs").getPointer();
  Address MappersArray =
      CGF.CreateMemTemp(PointerArrayType, ".offload_mappers");
  Info.MappersArray = MappersArray.getPointer();

  // If we don't have any VLA types or other types that require runtime
  // evaluation, we can use a constant array for the map sizes, otherwise we
  // need to fill up the arrays as we do for the pointers.
  QualType Int64Ty =
      Ctx.getIntTypeForBitwidth(/*DestWidth=*/64, /*Signed=*/1);
  if (hasRuntimeEvaluationCaptureSize) {
    QualType SizeArrayType = Ctx.getConstantArrayType(
        Int64Ty, PointerNumAP, nullptr, ArrayType::Normal,
        /*IndexTypeQuals=*/0);
    Info.SizesArray =
        CGF.CreateMemTemp(SizeArrayType, ".offload_sizes").getPointer();
  } else {
    // We expect all the sizes to be constant, so we collect them to create
    // a constant array.
    SmallVector<llvm::Constant *, 16> ConstSizes;
    for (unsigned I = 0, E = CombinedInfo.Sizes.size(); I < E; ++I) {
      if (IsNonContiguous &&
          (CombinedInfo.Types[I] & MappableExprsHandler::OMP_MAP_NON_CONTIG)) {
        ConstSizes.push_back(llvm::ConstantInt::get(
            CGF.Int64Ty, CombinedInfo.NonContigInfo.Dims[I]));
      } else {
        ConstSizes.push_back(cast<llvm::Constant>(CombinedInfo.Sizes[I]));
      }
    }

    auto *SizesArrayInit = llvm::ConstantArray::get(
        llvm::ArrayType::get(CGM.Int64Ty, ConstSizes.size()), ConstSizes);
    std::string Name = CGM.getOpenMPRuntime().getName({"offload_sizes"});
    auto *SizesArrayGbl = new llvm::GlobalVariable(
        CGM.getModule(), SizesArrayInit->getType(),
        /*isConstant=*/true, llvm::GlobalValue::PrivateLinkage,
        SizesArrayInit, Name);
    SizesArrayGbl->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
    Info.SizesArray = SizesArrayGbl;
  }

  // The map types are always constant so we don't need to generate code to
  // fill arrays. Instead, we create an array constant.
  SmallVector<uint64_t, 4> Mapping(CombinedInfo.Types.size(), 0);
  llvm::copy(CombinedInfo.Types, Mapping.begin());
  std::string MaptypesName =
      CGM.getOpenMPRuntime().getName({"offload_maptypes"});
  auto *MapTypesArrayGbl =
      OMPBuilder.createOffloadMaptypes(Mapping, MaptypesName);
  Info.MapTypesArray = MapTypesArrayGbl;

  // The information types are only built if there is debug information
  // requested.
  if (CGM.getCodeGenOpts().getDebugInfo() == codegenoptions::NoDebugInfo) {
    Info.MapNamesArray = llvm::Constant::getNullValue(
        llvm::Type::getInt8Ty(CGF.Builder.getContext())->getPointerTo());
  } else {
    auto fillInfoMap = [&](MappableExprsHandler::MappingExprInfo &MapExpr) {
      return emitMappingInformation(CGF, OMPBuilder, MapExpr);
    };
    SmallVector<llvm::Constant *, 4> InfoMap(CombinedInfo.Exprs.size());
    llvm::transform(CombinedInfo.Exprs, InfoMap.begin(), fillInfoMap);
    std::string MapnamesName =
        CGM.getOpenMPRuntime().getName({"offload_mapnames"});
    auto *MapNamesArrayGbl =
        OMPBuilder.createOffloadMapnames(InfoMap, MapnamesName);
    Info.MapNamesArray = MapNamesArrayGbl;
  }

  // If there's a present map type modifier, it must not be applied to the end
  // of a region, so generate a separate map type array in that case.
  if (Info.separateBeginEndCalls()) {
    bool EndMapTypesDiffer = false;
    for (uint64_t &Type : Mapping) {
      if (Type & MappableExprsHandler::OMP_MAP_PRESENT) {
        Type &= ~MappableExprsHandler::OMP_MAP_PRESENT;
        EndMapTypesDiffer = true;
      }
    }
    if (EndMapTypesDiffer) {
      MapTypesArrayGbl =
          OMPBuilder.createOffloadMaptypes(Mapping, MaptypesName);
      Info.MapTypesArrayEnd = MapTypesArrayGbl;
    }
  }

  for (unsigned I = 0; I < Info.NumberOfPtrs; ++I) {
    llvm::Value *BPVal = *CombinedInfo.BasePointers[I];
    llvm::Value *BP = CGF.Builder.CreateConstInBoundsGEP2_32(
        llvm::ArrayType::get(CGM.VoidPtrTy, Info.NumberOfPtrs),
        Info.BasePointersArray, 0, I);
    BP = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
        BP, BPVal->getType()->getPointerTo(/*AddrSpace=*/0));
    Address BPAddr(BP, Ctx.getTypeAlignInChars(Ctx.VoidPtrTy));
    CGF.Builder.CreateStore(BPVal, BPAddr);

    if (Info.requiresDevicePointerInfo())
      if (const ValueDecl *DevVD =
              CombinedInfo.BasePointers[I].getDevicePtrDecl())
        Info.CaptureDeviceAddrMap.try_emplace(DevVD, BPAddr);

    llvm::Value *PVal = CombinedInfo.Pointers[I];
    llvm::Value *P = CGF.Builder.CreateConstInBoundsGEP2_32(
        llvm::ArrayType::get(CGM.VoidPtrTy, Info.NumberOfPtrs),
        Info.PointersArray, 0, I);
    P = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
        P, PVal->getType()->getPointerTo(/*AddrSpace=*/0));
    Address PAddr(P, Ctx.getTypeAlignInChars(Ctx.VoidPtrTy));
    CGF.Builder.CreateStore(PVal, PAddr);

    if (hasRuntimeEvaluationCaptureSize) {
      llvm::Value *S = CGF.Builder.CreateConstInBoundsGEP2_32(
          llvm::ArrayType::get(CGM.Int64Ty, Info.NumberOfPtrs),
          Info.SizesArray,
          /*Idx0=*/0,
          /*Idx1=*/I);
      Address SAddr(S, Ctx.getTypeAlignInChars(Int64Ty));
      CGF.Builder.CreateStore(CGF.Builder.CreateIntCast(CombinedInfo.Sizes[I],
                                                        CGM.Int64Ty,
                                                        /*isSigned=*/true),
                              SAddr);
    }

    // Fill up the mapper array.
    llvm::Value *MFunc = llvm::ConstantPointerNull::get(CGM.VoidPtrTy);
    if (CombinedInfo.Mappers[I]) {
      MFunc = CGM.getOpenMPRuntime().getOrCreateUserDefinedMapperFunc(
          cast<OMPDeclareMapperDecl>(CombinedInfo.Mappers[I]));
      MFunc = CGF.Builder.CreatePointerCast(MFunc, CGM.VoidPtrTy);
      Info.HasMapper = true;
    }
    Address MAddr = CGF.Builder.CreateConstArrayGEP(MappersArray, I);
    CGF.Builder.CreateStore(MFunc, MAddr);
  }
}

if (!IsNonContiguous || CombinedInfo.NonContigInfo.Offsets.empty() ||
    Info.NumberOfPtrs == 0)
  return;

emitNonContiguousDescriptor(CGF, CombinedInfo, Info);
9641}

9643namespace {
9644/// Additional arguments for emitOffloadingArraysArgument function.
9645struct ArgumentsOptions {
bool ForEndCall = false;
ArgumentsOptions() = default;
ArgumentsOptions(bool ForEndCall) : ForEndCall(ForEndCall) {}
9649};
9650} // namespace

9652/// Emit the arguments to be passed to the runtime library based on the
9653/// arrays of base pointers, pointers, sizes, map types, and mappers.  If
9654/// ForEndCall, emit map types to be passed for the end of the region instead of
9655/// the beginning.
9656static void emitOffloadingArraysArgument(
  CodeGenFunction &CGF, llvm::Value *&BasePointersArrayArg,
  llvm::Value *&PointersArrayArg, llvm::Value *&SizesArrayArg,
  llvm::Value *&MapTypesArrayArg, llvm::Value *&MapNamesArrayArg,
  llvm::Value *&MappersArrayArg, CGOpenMPRuntime::TargetDataInfo &Info,
  const ArgumentsOptions &Options = ArgumentsOptions()) {
assert((!Options.ForEndCall || Info.separateBeginEndCalls()) &&((void)0)
       "expected region end call to runtime only when end call is separate")((void)0);
CodeGenModule &CGM = CGF.CGM;
if (Info.NumberOfPtrs) {
  BasePointersArrayArg = CGF.Builder.CreateConstInBoundsGEP2_32(
      llvm::ArrayType::get(CGM.VoidPtrTy, Info.NumberOfPtrs),
      Info.BasePointersArray,
      /*Idx0=*/0, /*Idx1=*/0);
  PointersArrayArg = CGF.Builder.CreateConstInBoundsGEP2_32(
      llvm::ArrayType::get(CGM.VoidPtrTy, Info.NumberOfPtrs),
      Info.PointersArray,
      /*Idx0=*/0,
      /*Idx1=*/0);
  SizesArrayArg = CGF.Builder.CreateConstInBoundsGEP2_32(
      llvm::ArrayType::get(CGM.Int64Ty, Info.NumberOfPtrs), Info.SizesArray,
      /*Idx0=*/0, /*Idx1=*/0);
  MapTypesArrayArg = CGF.Builder.CreateConstInBoundsGEP2_32(
      llvm::ArrayType::get(CGM.Int64Ty, Info.NumberOfPtrs),
      Options.ForEndCall && Info.MapTypesArrayEnd ? Info.MapTypesArrayEnd
                                                  : Info.MapTypesArray,
      /*Idx0=*/0,
      /*Idx1=*/0);

  // Only emit the mapper information arrays if debug information is
  // requested.
  if (CGF.CGM.getCodeGenOpts().getDebugInfo() == codegenoptions::NoDebugInfo)
    MapNamesArrayArg = llvm::ConstantPointerNull::get(CGM.VoidPtrPtrTy);
  else
    MapNamesArrayArg = CGF.Builder.CreateConstInBoundsGEP2_32(
        llvm::ArrayType::get(CGM.VoidPtrTy, Info.NumberOfPtrs),
        Info.MapNamesArray,
        /*Idx0=*/0,
        /*Idx1=*/0);
  // If there is no user-defined mapper, set the mapper array to nullptr to
  // avoid an unnecessary data privatization
  if (!Info.HasMapper)
    MappersArrayArg = llvm::ConstantPointerNull::get(CGM.VoidPtrPtrTy);
  else
    MappersArrayArg =
        CGF.Builder.CreatePointerCast(Info.MappersArray, CGM.VoidPtrPtrTy);
} else {
  BasePointersArrayArg = llvm::ConstantPointerNull::get(CGM.VoidPtrPtrTy);
  PointersArrayArg = llvm::ConstantPointerNull::get(CGM.VoidPtrPtrTy);
  SizesArrayArg = llvm::ConstantPointerNull::get(CGM.Int64Ty->getPointerTo());
  MapTypesArrayArg =
      llvm::ConstantPointerNull::get(CGM.Int64Ty->getPointerTo());
  MapNamesArrayArg = llvm::ConstantPointerNull::get(CGM.VoidPtrPtrTy);
  MappersArrayArg = llvm::ConstantPointerNull::get(CGM.VoidPtrPtrTy);
}
9711}

9713/// Check for inner distribute directive.
9714static const OMPExecutableDirective *
9715getNestedDistributeDirective(ASTContext &Ctx, const OMPExecutableDirective &D) {
const auto *CS = D.getInnermostCapturedStmt();
const auto *Body =
    CS->getCapturedStmt()->IgnoreContainers(/*IgnoreCaptured=*/true);
const Stmt *ChildStmt =
    CGOpenMPSIMDRuntime::getSingleCompoundChild(Ctx, Body);

if (const auto *NestedDir =
        dyn_cast_or_null<OMPExecutableDirective>(ChildStmt)) {
  OpenMPDirectiveKind DKind = NestedDir->getDirectiveKind();
  switch (D.getDirectiveKind()) {
  case OMPD_target:
    if (isOpenMPDistributeDirective(DKind))
      return NestedDir;
    if (DKind == OMPD_teams) {
      Body = NestedDir->getInnermostCapturedStmt()->IgnoreContainers(
          /*IgnoreCaptured=*/true);
      if (!Body)
        return nullptr;
      ChildStmt = CGOpenMPSIMDRuntime::getSingleCompoundChild(Ctx, Body);
      if (const auto *NND =
              dyn_cast_or_null<OMPExecutableDirective>(ChildStmt)) {
        DKind = NND->getDirectiveKind();
        if (isOpenMPDistributeDirective(DKind))
          return NND;
      }
    }
    return nullptr;
  case OMPD_target_teams:
    if (isOpenMPDistributeDirective(DKind))
      return NestedDir;
    return nullptr;
  case OMPD_target_parallel:
  case OMPD_target_simd:
  case OMPD_target_parallel_for:
  case OMPD_target_parallel_for_simd:
    return nullptr;
  case OMPD_target_teams_distribute:
  case OMPD_target_teams_distribute_simd:
  case OMPD_target_teams_distribute_parallel_for:
  case OMPD_target_teams_distribute_parallel_for_simd:
  case OMPD_parallel:
  case OMPD_for:
  case OMPD_parallel_for:
  case OMPD_parallel_master:
  case OMPD_parallel_sections:
  case OMPD_for_simd:
  case OMPD_parallel_for_simd:
  case OMPD_cancel:
  case OMPD_cancellation_point:
  case OMPD_ordered:
  case OMPD_threadprivate:
  case OMPD_allocate:
  case OMPD_task:
  case OMPD_simd:
  case OMPD_tile:
  case OMPD_unroll:
  case OMPD_sections:
  case OMPD_section:
  case OMPD_single:
  case OMPD_master:
  case OMPD_critical:
  case OMPD_taskyield:
  case OMPD_barrier:
  case OMPD_taskwait:
  case OMPD_taskgroup:
  case OMPD_atomic:
  case OMPD_flush:
  case OMPD_depobj:
  case OMPD_scan:
  case OMPD_teams:
  case OMPD_target_data:
  case OMPD_target_exit_data:
  case OMPD_target_enter_data:
  case OMPD_distribute:
  case OMPD_distribute_simd:
  case OMPD_distribute_parallel_for:
  case OMPD_distribute_parallel_for_simd:
  case OMPD_teams_distribute:
  case OMPD_teams_distribute_simd:
  case OMPD_teams_distribute_parallel_for:
  case OMPD_teams_distribute_parallel_for_simd:
  case OMPD_target_update:
  case OMPD_declare_simd:
  case OMPD_declare_variant:
  case OMPD_begin_declare_variant:
  case OMPD_end_declare_variant:
  case OMPD_declare_target:
  case OMPD_end_declare_target:
  case OMPD_declare_reduction:
  case OMPD_declare_mapper:
  case OMPD_taskloop:
  case OMPD_taskloop_simd:
  case OMPD_master_taskloop:
  case OMPD_master_taskloop_simd:
  case OMPD_parallel_master_taskloop:
  case OMPD_parallel_master_taskloop_simd:
  case OMPD_requires:
  case OMPD_unknown:
  default:
    llvm_unreachable("Unexpected directive.")__builtin_unreachable();
  }
}

return nullptr;
9820}

9822/// Emit the user-defined mapper function. The code generation follows the
9823/// pattern in the example below.
9824/// \code
9825/// void .omp_mapper.<type_name>.<mapper_id>.(void *rt_mapper_handle,
9826///                                           void *base, void *begin,
9827///                                           int64_t size, int64_t type,
9828///                                           void *name = nullptr) {
9829///   // Allocate space for an array section first or add a base/begin for
9830///   // pointer dereference.
9831///   if ((size > 1 || (base != begin && maptype.IsPtrAndObj)) &&
9832///       !maptype.IsDelete)
9833///     __tgt_push_mapper_component(rt_mapper_handle, base, begin,
9834///                                 size*sizeof(Ty), clearToFromMember(type));
9835///   // Map members.
9836///   for (unsigned i = 0; i < size; i++) {
9837///     // For each component specified by this mapper:
9838///     for (auto c : begin[i]->all_components) {
9839///       if (c.hasMapper())
9840///         (*c.Mapper())(rt_mapper_handle, c.arg_base, c.arg_begin, c.arg_size,
9841///                       c.arg_type, c.arg_name);
9842///       else
9843///         __tgt_push_mapper_component(rt_mapper_handle, c.arg_base,
9844///                                     c.arg_begin, c.arg_size, c.arg_type,
9845///                                     c.arg_name);
9846///     }
9847///   }
9848///   // Delete the array section.
9849///   if (size > 1 && maptype.IsDelete)
9850///     __tgt_push_mapper_component(rt_mapper_handle, base, begin,
9851///                                 size*sizeof(Ty), clearToFromMember(type));
9852/// }
9853/// \endcode
9854void CGOpenMPRuntime::emitUserDefinedMapper(const OMPDeclareMapperDecl *D,
                                          CodeGenFunction *CGF) {
if (UDMMap.count(D) > 0)
  return;
ASTContext &C = CGM.getContext();
QualType Ty = D->getType();
QualType PtrTy = C.getPointerType(Ty).withRestrict();
QualType Int64Ty = C.getIntTypeForBitwidth(/*DestWidth=*/64, /*Signed=*/true);
auto *MapperVarDecl =
    cast<VarDecl>(cast<DeclRefExpr>(D->getMapperVarRef())->getDecl());
SourceLocation Loc = D->getLocation();
CharUnits ElementSize = C.getTypeSizeInChars(Ty);

// Prepare mapper function arguments and attributes.
ImplicitParamDecl HandleArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr,
                            C.VoidPtrTy, ImplicitParamDecl::Other);
ImplicitParamDecl BaseArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, C.VoidPtrTy,
                          ImplicitParamDecl::Other);
ImplicitParamDecl BeginArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr,
                           C.VoidPtrTy, ImplicitParamDecl::Other);
ImplicitParamDecl SizeArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, Int64Ty,
                          ImplicitParamDecl::Other);
ImplicitParamDecl TypeArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, Int64Ty,
                          ImplicitParamDecl::Other);
ImplicitParamDecl NameArg(C, /*DC=*/nullptr, Loc, /*Id=*/nullptr, C.VoidPtrTy,
                          ImplicitParamDecl::Other);
FunctionArgList Args;
Args.push_back(&HandleArg);
Args.push_back(&BaseArg);
Args.push_back(&BeginArg);
Args.push_back(&SizeArg);
Args.push_back(&TypeArg);
Args.push_back(&NameArg);
const CGFunctionInfo &FnInfo =
    CGM.getTypes().arrangeBuiltinFunctionDeclaration(C.VoidTy, Args);
llvm::FunctionType *FnTy = CGM.getTypes().GetFunctionType(FnInfo);
SmallString<64> TyStr;
llvm::raw_svector_ostream Out(TyStr);
CGM.getCXXABI().getMangleContext().mangleTypeName(Ty, Out);
std::string Name = getName({"omp_mapper", TyStr, D->getName()});
auto *Fn = llvm::Function::Create(FnTy, llvm::GlobalValue::InternalLinkage,
                                  Name, &CGM.getModule());
CGM.SetInternalFunctionAttributes(GlobalDecl(), Fn, FnInfo);
Fn->removeFnAttr(llvm::Attribute::OptimizeNone);
// Start the mapper function code generation.
CodeGenFunction MapperCGF(CGM);
MapperCGF.StartFunction(GlobalDecl(), C.VoidTy, Fn, FnInfo, Args, Loc, Loc);
// Compute the starting and end addresses of array elements.
llvm::Value *Size = MapperCGF.EmitLoadOfScalar(
    MapperCGF.GetAddrOfLocalVar(&SizeArg), /*Volatile=*/false,
    C.getPointerType(Int64Ty), Loc);
// Prepare common arguments for array initiation and deletion.
llvm::Value *Handle = MapperCGF.EmitLoadOfScalar(
    MapperCGF.GetAddrOfLocalVar(&HandleArg),
    /*Volatile=*/false, C.getPointerType(C.VoidPtrTy), Loc);
llvm::Value *BaseIn = MapperCGF.EmitLoadOfScalar(
    MapperCGF.GetAddrOfLocalVar(&BaseArg),
    /*Volatile=*/false, C.getPointerType(C.VoidPtrTy), Loc);
llvm::Value *BeginIn = MapperCGF.EmitLoadOfScalar(
    MapperCGF.GetAddrOfLocalVar(&BeginArg),
    /*Volatile=*/false, C.getPointerType(C.VoidPtrTy), Loc);
// Convert the size in bytes into the number of array elements.
Size = MapperCGF.Builder.CreateExactUDiv(
    Size, MapperCGF.Builder.getInt64(ElementSize.getQuantity()));
llvm::Value *PtrBegin = MapperCGF.Builder.CreateBitCast(
    BeginIn, CGM.getTypes().ConvertTypeForMem(PtrTy));
llvm::Value *PtrEnd = MapperCGF.Builder.CreateGEP(
    PtrBegin->getType()->getPointerElementType(), PtrBegin, Size);
llvm::Value *MapType = MapperCGF.EmitLoadOfScalar(
    MapperCGF.GetAddrOfLocalVar(&TypeArg), /*Volatile=*/false,
    C.getPointerType(Int64Ty), Loc);
llvm::Value *MapName = MapperCGF.EmitLoadOfScalar(
    MapperCGF.GetAddrOfLocalVar(&NameArg),
    /*Volatile=*/false, C.getPointerType(C.VoidPtrTy), Loc);

// Emit array initiation if this is an array section and \p MapType indicates
// that memory allocation is required.
llvm::BasicBlock *HeadBB = MapperCGF.createBasicBlock("omp.arraymap.head");
emitUDMapperArrayInitOrDel(MapperCGF, Handle, BaseIn, BeginIn, Size, MapType,
                           MapName, ElementSize, HeadBB, /*IsInit=*/true);

// Emit a for loop to iterate through SizeArg of elements and map all of them.

// Emit the loop header block.
MapperCGF.EmitBlock(HeadBB);
llvm::BasicBlock *BodyBB = MapperCGF.createBasicBlock("omp.arraymap.body");
llvm::BasicBlock *DoneBB = MapperCGF.createBasicBlock("omp.done");
// Evaluate whether the initial condition is satisfied.
llvm::Value *IsEmpty =
    MapperCGF.Builder.CreateICmpEQ(PtrBegin, PtrEnd, "omp.arraymap.isempty");
MapperCGF.Builder.CreateCondBr(IsEmpty, DoneBB, BodyBB);
llvm::BasicBlock *EntryBB = MapperCGF.Builder.GetInsertBlock();

// Emit the loop body block.
MapperCGF.EmitBlock(BodyBB);
llvm::BasicBlock *LastBB = BodyBB;
llvm::PHINode *PtrPHI = MapperCGF.Builder.CreatePHI(
    PtrBegin->getType(), 2, "omp.arraymap.ptrcurrent");
PtrPHI->addIncoming(PtrBegin, EntryBB);
Address PtrCurrent =
    Address(PtrPHI, MapperCGF.GetAddrOfLocalVar(&BeginArg)
                        .getAlignment()
                        .alignmentOfArrayElement(ElementSize));
// Privatize the declared variable of mapper to be the current array element.
CodeGenFunction::OMPPrivateScope Scope(MapperCGF);
Scope.addPrivate(MapperVarDecl, [PtrCurrent]() { return PtrCurrent; });
(void)Scope.Privatize();

// Get map clause information. Fill up the arrays with all mapped variables.
MappableExprsHandler::MapCombinedInfoTy Info;
MappableExprsHandler MEHandler(*D, MapperCGF);
MEHandler.generateAllInfoForMapper(Info);

// Call the runtime API __tgt_mapper_num_components to get the number of
// pre-existing components.
llvm::Value *OffloadingArgs[] = {Handle};
llvm::Value *PreviousSize = MapperCGF.EmitRuntimeCall(
    OMPBuilder.getOrCreateRuntimeFunction(CGM.getModule(),
                                          OMPRTL___tgt_mapper_num_components),
    OffloadingArgs);
llvm::Value *ShiftedPreviousSize = MapperCGF.Builder.CreateShl(
    PreviousSize,
    MapperCGF.Builder.getInt64(MappableExprsHandler::getFlagMemberOffset()));

// Fill up the runtime mapper handle for all components.
for (unsigned I = 0; I < Info.BasePointers.size(); ++I) {
  llvm::Value *CurBaseArg = MapperCGF.Builder.CreateBitCast(
      *Info.BasePointers[I], CGM.getTypes().ConvertTypeForMem(C.VoidPtrTy));
  llvm::Value *CurBeginArg = MapperCGF.Builder.CreateBitCast(
      Info.Pointers[I], CGM.getTypes().ConvertTypeForMem(C.VoidPtrTy));
  llvm::Value *CurSizeArg = Info.Sizes[I];
  llvm::Value *CurNameArg =
      (CGM.getCodeGenOpts().getDebugInfo() == codegenoptions::NoDebugInfo)
          ? llvm::ConstantPointerNull::get(CGM.VoidPtrTy)
          : emitMappingInformation(MapperCGF, OMPBuilder, Info.Exprs[I]);

  // Extract the MEMBER_OF field from the map type.
  llvm::Value *OriMapType = MapperCGF.Builder.getInt64(Info.Types[I]);
  llvm::Value *MemberMapType =
      MapperCGF.Builder.CreateNUWAdd(OriMapType, ShiftedPreviousSize);

  // Combine the map type inherited from user-defined mapper with that
  // specified in the program. According to the OMP_MAP_TO and OMP_MAP_FROM
  // bits of the \a MapType, which is the input argument of the mapper
  // function, the following code will set the OMP_MAP_TO and OMP_MAP_FROM
  // bits of MemberMapType.
  // [OpenMP 5.0], 1.2.6. map-type decay.
  //        | alloc |  to   | from  | tofrom | release | delete
  // ----------------------------------------------------------
  // alloc  | alloc | alloc | alloc | alloc  | release | delete
  // to     | alloc |  to   | alloc |   to   | release | delete
  // from   | alloc | alloc | from  |  from  | release | delete
  // tofrom | alloc |  to   | from  | tofrom | release | delete
  llvm::Value *LeftToFrom = MapperCGF.Builder.CreateAnd(
      MapType,
      MapperCGF.Builder.getInt64(MappableExprsHandler::OMP_MAP_TO |
                                 MappableExprsHandler::OMP_MAP_FROM));
  llvm::BasicBlock *AllocBB = MapperCGF.createBasicBlock("omp.type.alloc");
  llvm::BasicBlock *AllocElseBB =
      MapperCGF.createBasicBlock("omp.type.alloc.else");
  llvm::BasicBlock *ToBB = MapperCGF.createBasicBlock("omp.type.to");
  llvm::BasicBlock *ToElseBB = MapperCGF.createBasicBlock("omp.type.to.else");
  llvm::BasicBlock *FromBB = MapperCGF.createBasicBlock("omp.type.from");
  llvm::BasicBlock *EndBB = MapperCGF.createBasicBlock("omp.type.end");
  llvm::Value *IsAlloc = MapperCGF.Builder.CreateIsNull(LeftToFrom);
  MapperCGF.Builder.CreateCondBr(IsAlloc, AllocBB, AllocElseBB);
  // In case of alloc, clear OMP_MAP_TO and OMP_MAP_FROM.
  MapperCGF.EmitBlock(AllocBB);
  llvm::Value *AllocMapType = MapperCGF.Builder.CreateAnd(
      MemberMapType,
      MapperCGF.Builder.getInt64(~(MappableExprsHandler::OMP_MAP_TO |
                                   MappableExprsHandler::OMP_MAP_FROM)));
  MapperCGF.Builder.CreateBr(EndBB);
  MapperCGF.EmitBlock(AllocElseBB);
  llvm::Value *IsTo = MapperCGF.Builder.CreateICmpEQ(
      LeftToFrom,
      MapperCGF.Builder.getInt64(MappableExprsHandler::OMP_MAP_TO));
  MapperCGF.Builder.CreateCondBr(IsTo, ToBB, ToElseBB);
  // In case of to, clear OMP_MAP_FROM.
  MapperCGF.EmitBlock(ToBB);
  llvm::Value *ToMapType = MapperCGF.Builder.CreateAnd(
      MemberMapType,
      MapperCGF.Builder.getInt64(~MappableExprsHandler::OMP_MAP_FROM));
  MapperCGF.Builder.CreateBr(EndBB);
  MapperCGF.EmitBlock(ToElseBB);
  llvm::Value *IsFrom = MapperCGF.Builder.CreateICmpEQ(
      LeftToFrom,
      MapperCGF.Builder.getInt64(MappableExprsHandler::OMP_MAP_FROM));
  MapperCGF.Builder.CreateCondBr(IsFrom, FromBB, EndBB);
  // In case of from, clear OMP_MAP_TO.
  MapperCGF.EmitBlock(FromBB);
  llvm::Value *FromMapType = MapperCGF.Builder.CreateAnd(
      MemberMapType,
      MapperCGF.Builder.getInt64(~MappableExprsHandler::OMP_MAP_TO));
  // In case of tofrom, do nothing.
  MapperCGF.EmitBlock(EndBB);
  LastBB = EndBB;
  llvm::PHINode *CurMapType =
      MapperCGF.Builder.CreatePHI(CGM.Int64Ty, 4, "omp.maptype");
  CurMapType->addIncoming(AllocMapType, AllocBB);
  CurMapType->addIncoming(ToMapType, ToBB);
  CurMapType->addIncoming(FromMapType, FromBB);
  CurMapType->addIncoming(MemberMapType, ToElseBB);

  llvm::Value *OffloadingArgs[] = {Handle,     CurBaseArg, CurBeginArg,
                                   CurSizeArg, CurMapType, CurNameArg};
  if (Info.Mappers[I]) {
    // Call the corresponding mapper function.
    llvm::Function *MapperFunc = getOrCreateUserDefinedMapperFunc(
        cast<OMPDeclareMapperDecl>(Info.Mappers[I]));
    assert(MapperFunc && "Expect a valid mapper function is available.")((void)0);
    MapperCGF.EmitNounwindRuntimeCall(MapperFunc, OffloadingArgs);
  } else {
    // Call the runtime API __tgt_push_mapper_component to fill up the runtime
    // data structure.
    MapperCGF.EmitRuntimeCall(
        OMPBuilder.getOrCreateRuntimeFunction(
            CGM.getModule(), OMPRTL___tgt_push_mapper_component),
        OffloadingArgs);
  }
}

// Update the pointer to point to the next element that needs to be mapped,
// and check whether we have mapped all elements.
llvm::Type *ElemTy = PtrPHI->getType()->getPointerElementType();
llvm::Value *PtrNext = MapperCGF.Builder.CreateConstGEP1_32(
    ElemTy, PtrPHI, /*Idx0=*/1, "omp.arraymap.next");
PtrPHI->addIncoming(PtrNext, LastBB);
llvm::Value *IsDone =
    MapperCGF.Builder.CreateICmpEQ(PtrNext, PtrEnd, "omp.arraymap.isdone");
llvm::BasicBlock *ExitBB = MapperCGF.createBasicBlock("omp.arraymap.exit");
MapperCGF.Builder.CreateCondBr(IsDone, ExitBB, BodyBB);

MapperCGF.EmitBlock(ExitBB);
// Emit array deletion if this is an array section and \p MapType indicates
// that deletion is required.
emitUDMapperArrayInitOrDel(MapperCGF, Handle, BaseIn, BeginIn, Size, MapType,
                           MapName, ElementSize, DoneBB, /*IsInit=*/false);

// Emit the function exit block.
MapperCGF.EmitBlock(DoneBB, /*IsFinished=*/true);
MapperCGF.FinishFunction();
UDMMap.try_emplace(D, Fn);
if (CGF) {
  auto &Decls = FunctionUDMMap.FindAndConstruct(CGF->CurFn);
  Decls.second.push_back(D);
}
10101}

10103/// Emit the array initialization or deletion portion for user-defined mapper
10104/// code generation. First, it evaluates whether an array section is mapped and
10105/// whether the \a MapType instructs to delete this section. If \a IsInit is
10106/// true, and \a MapType indicates to not delete this array, array
10107/// initialization code is generated. If \a IsInit is false, and \a MapType
10108/// indicates to not this array, array deletion code is generated.
10109void CGOpenMPRuntime::emitUDMapperArrayInitOrDel(
  CodeGenFunction &MapperCGF, llvm::Value *Handle, llvm::Value *Base,
  llvm::Value *Begin, llvm::Value *Size, llvm::Value *MapType,
  llvm::Value *MapName, CharUnits ElementSize, llvm::BasicBlock *ExitBB,
  bool IsInit) {
StringRef Prefix = IsInit ? ".init" : ".del";

// Evaluate if this is an array section.
llvm::BasicBlock *BodyBB =
    MapperCGF.createBasicBlock(getName({"omp.array", Prefix}));
llvm::Value *IsArray = MapperCGF.Builder.CreateICmpSGT(
    Size, MapperCGF.Builder.getInt64(1), "omp.arrayinit.isarray");
llvm::Value *DeleteBit = MapperCGF.Builder.CreateAnd(
    MapType,
    MapperCGF.Builder.getInt64(MappableExprsHandler::OMP_MAP_DELETE));
llvm::Value *DeleteCond;
llvm::Value *Cond;
if (IsInit) {
  // base != begin?
  llvm::Value *BaseIsBegin = MapperCGF.Builder.CreateIsNotNull(
      MapperCGF.Builder.CreatePtrDiff(Base, Begin));
  // IsPtrAndObj?
  llvm::Value *PtrAndObjBit = MapperCGF.Builder.CreateAnd(
      MapType,
      MapperCGF.Builder.getInt64(MappableExprsHandler::OMP_MAP_PTR_AND_OBJ));
  PtrAndObjBit = MapperCGF.Builder.CreateIsNotNull(PtrAndObjBit);
  BaseIsBegin = MapperCGF.Builder.CreateAnd(BaseIsBegin, PtrAndObjBit);
  Cond = MapperCGF.Builder.CreateOr(IsArray, BaseIsBegin);
  DeleteCond = MapperCGF.Builder.CreateIsNull(
      DeleteBit, getName({"omp.array", Prefix, ".delete"}));
} else {
  Cond = IsArray;
  DeleteCond = MapperCGF.Builder.CreateIsNotNull(
      DeleteBit, getName({"omp.array", Prefix, ".delete"}));
}
Cond = MapperCGF.Builder.CreateAnd(Cond, DeleteCond);
MapperCGF.Builder.CreateCondBr(Cond, BodyBB, ExitBB);

MapperCGF.EmitBlock(BodyBB);
// Get the array size by multiplying element size and element number (i.e., \p
// Size).
llvm::Value *ArraySize = MapperCGF.Builder.CreateNUWMul(
    Size, MapperCGF.Builder.getInt64(ElementSize.getQuantity()));
// Remove OMP_MAP_TO and OMP_MAP_FROM from the map type, so that it achieves
// memory allocation/deletion purpose only.
llvm::Value *MapTypeArg = MapperCGF.Builder.CreateAnd(
    MapType,
    MapperCGF.Builder.getInt64(~(MappableExprsHandler::OMP_MAP_TO |
                                 MappableExprsHandler::OMP_MAP_FROM)));
MapTypeArg = MapperCGF.Builder.CreateOr(
    MapTypeArg,
    MapperCGF.Builder.getInt64(MappableExprsHandler::OMP_MAP_IMPLICIT));

// Call the runtime API __tgt_push_mapper_component to fill up the runtime
// data structure.
llvm::Value *OffloadingArgs[] = {Handle,    Base,       Begin,
                                 ArraySize, MapTypeArg, MapName};
MapperCGF.EmitRuntimeCall(
    OMPBuilder.getOrCreateRuntimeFunction(CGM.getModule(),
                                          OMPRTL___tgt_push_mapper_component),
    OffloadingArgs);
10170}

10172llvm::Function *CGOpenMPRuntime::getOrCreateUserDefinedMapperFunc(
  const OMPDeclareMapperDecl *D) {
auto I = UDMMap.find(D);
if (I != UDMMap.end())
  return I->second;
emitUserDefinedMapper(D);
return UDMMap.lookup(D);
10179}

10181void CGOpenMPRuntime::emitTargetNumIterationsCall(
  CodeGenFunction &CGF, const OMPExecutableDirective &D,
  llvm::Value *DeviceID,
  llvm::function_ref<llvm::Value *(CodeGenFunction &CGF,
                                   const OMPLoopDirective &D)>
      SizeEmitter) {
OpenMPDirectiveKind Kind = D.getDirectiveKind();
const OMPExecutableDirective *TD = &D;
// Get nested teams distribute kind directive, if any.
if (!isOpenMPDistributeDirective(Kind) || !isOpenMPTeamsDirective(Kind))
  TD = getNestedDistributeDirective(CGM.getContext(), D);
if (!TD)
  return;
const auto *LD = cast<OMPLoopDirective>(TD);
auto &&CodeGen = [LD, DeviceID, SizeEmitter, &D, this](CodeGenFunction &CGF,
                                                       PrePostActionTy &) {
  if (llvm::Value *NumIterations = SizeEmitter(CGF, *LD)) {
    llvm::Value *RTLoc = emitUpdateLocation(CGF, D.getBeginLoc());
    llvm::Value *Args[] = {RTLoc, DeviceID, NumIterations};
    CGF.EmitRuntimeCall(
        OMPBuilder.getOrCreateRuntimeFunction(
            CGM.getModule(), OMPRTL___kmpc_push_target_tripcount_mapper),
        Args);
  }
};
emitInlinedDirective(CGF, OMPD_unknown, CodeGen);
10207}

10209void CGOpenMPRuntime::emitTargetCall(
  CodeGenFunction &CGF, const OMPExecutableDirective &D,
  llvm::Function *OutlinedFn, llvm::Value *OutlinedFnID, const Expr *IfCond,
  llvm::PointerIntPair<const Expr *, 2, OpenMPDeviceClauseModifier> Device,
  llvm::function_ref<llvm::Value *(CodeGenFunction &CGF,
                                   const OMPLoopDirective &D)>
      SizeEmitter) {
if (!CGF.HaveInsertPoint())
  return;

assert(OutlinedFn && "Invalid outlined function!")((void)0);

const bool RequiresOuterTask = D.hasClausesOfKind<OMPDependClause>() ||
                               D.hasClausesOfKind<OMPNowaitClause>();
llvm::SmallVector<llvm::Value *, 16> CapturedVars;
const CapturedStmt &CS = *D.getCapturedStmt(OMPD_target);
auto &&ArgsCodegen = [&CS, &CapturedVars](CodeGenFunction &CGF,
                                          PrePostActionTy &) {
  CGF.GenerateOpenMPCapturedVars(CS, CapturedVars);
};
emitInlinedDirective(CGF, OMPD_unknown, ArgsCodegen);

CodeGenFunction::OMPTargetDataInfo InputInfo;
llvm::Value *MapTypesArray = nullptr;
llvm::Value *MapNamesArray = nullptr;
// Fill up the pointer arrays and transfer execution to the device.
auto &&ThenGen = [this, Device, OutlinedFn, OutlinedFnID, &D, &InputInfo,
                  &MapTypesArray, &MapNamesArray, &CS, RequiresOuterTask,
                  &CapturedVars,
                  SizeEmitter](CodeGenFunction &CGF, PrePostActionTy &) {
  if (Device.getInt() == OMPC_DEVICE_ancestor) {
    // Reverse offloading is not supported, so just execute on the host.
    if (RequiresOuterTask) {
      CapturedVars.clear();
      CGF.GenerateOpenMPCapturedVars(CS, CapturedVars);
    }
    emitOutlinedFunctionCall(CGF, D.getBeginLoc(), OutlinedFn, CapturedVars);
    return;
  }

  // On top of the arrays that were filled up, the target offloading call
  // takes as arguments the device id as well as the host pointer. The host
  // pointer is used by the runtime library to identify the current target
  // region, so it only has to be unique and not necessarily point to
  // anything. It could be the pointer to the outlined function that
  // implements the target region, but we aren't using that so that the
  // compiler doesn't need to keep that, and could therefore inline the host
  // function if proven worthwhile during optimization.

  // From this point on, we need to have an ID of the target region defined.
  assert(OutlinedFnID && "Invalid outlined function ID!")((void)0);

  // Emit device ID if any.
  llvm::Value *DeviceID;
  if (Device.getPointer()) {
    assert((Device.getInt() == OMPC_DEVICE_unknown ||((void)0)
            Device.getInt() == OMPC_DEVICE_device_num) &&((void)0)
           "Expected device_num modifier.")((void)0);
    llvm::Value *DevVal = CGF.EmitScalarExpr(Device.getPointer());
    DeviceID =
        CGF.Builder.CreateIntCast(DevVal, CGF.Int64Ty, /*isSigned=*/true);
  } else {
    DeviceID = CGF.Builder.getInt64(OMP_DEVICEID_UNDEF);
  }

  // Emit the number of elements in the offloading arrays.
  llvm::Value *PointerNum =
      CGF.Builder.getInt32(InputInfo.NumberOfTargetItems);

  // Return value of the runtime offloading call.
  llvm::Value *Return;

  llvm::Value *NumTeams = emitNumTeamsForTargetDirective(CGF, D);
  llvm::Value *NumThreads = emitNumThreadsForTargetDirective(CGF, D);

  // Source location for the ident struct
  llvm::Value *RTLoc = emitUpdateLocation(CGF, D.getBeginLoc());

  // Emit tripcount for the target loop-based directive.
  emitTargetNumIterationsCall(CGF, D, DeviceID, SizeEmitter);

  bool HasNowait = D.hasClausesOfKind<OMPNowaitClause>();
  // The target region is an outlined function launched by the runtime
  // via calls __tgt_target() or __tgt_target_teams().
  //
  // __tgt_target() launches a target region with one team and one thread,
  // executing a serial region.  This master thread may in turn launch
  // more threads within its team upon encountering a parallel region,
  // however, no additional teams can be launched on the device.
  //
  // __tgt_target_teams() launches a target region with one or more teams,
  // each with one or more threads.  This call is required for target
  // constructs such as:
  //  'target teams'
  //  'target' / 'teams'
  //  'target teams distribute parallel for'
  //  'target parallel'
  // and so on.
  //
  // Note that on the host and CPU targets, the runtime implementation of
  // these calls simply call the outlined function without forking threads.
  // The outlined functions themselves have runtime calls to
  // __kmpc_fork_teams() and __kmpc_fork() for this purpose, codegen'd by
  // the compiler in emitTeamsCall() and emitParallelCall().
  //
  // In contrast, on the NVPTX target, the implementation of
  // __tgt_target_teams() launches a GPU kernel with the requested number
  // of teams and threads so no additional calls to the runtime are required.
  if (NumTeams) {
    // If we have NumTeams defined this means that we have an enclosed teams
    // region. Therefore we also expect to have NumThreads defined. These two
    // values should be defined in the presence of a teams directive,
    // regardless of having any clauses associated. If the user is using teams
    // but no clauses, these two values will be the default that should be
    // passed to the runtime library - a 32-bit integer with the value zero.
    assert(NumThreads && "Thread limit expression should be available along "((void)0)
                         "with number of teams.")((void)0);
    SmallVector<llvm::Value *> OffloadingArgs = {
        RTLoc,
        DeviceID,
        OutlinedFnID,
        PointerNum,
        InputInfo.BasePointersArray.getPointer(),
        InputInfo.PointersArray.getPointer(),
        InputInfo.SizesArray.getPointer(),
        MapTypesArray,
        MapNamesArray,
        InputInfo.MappersArray.getPointer(),
        NumTeams,
        NumThreads};
    if (HasNowait) {
      // Add int32_t depNum = 0, void *depList = nullptr, int32_t
      // noAliasDepNum = 0, void *noAliasDepList = nullptr.
      OffloadingArgs.push_back(CGF.Builder.getInt32(0));
      OffloadingArgs.push_back(llvm::ConstantPointerNull::get(CGM.VoidPtrTy));
      OffloadingArgs.push_back(CGF.Builder.getInt32(0));
      OffloadingArgs.push_back(llvm::ConstantPointerNull::get(CGM.VoidPtrTy));
    }
    Return = CGF.EmitRuntimeCall(
        OMPBuilder.getOrCreateRuntimeFunction(
            CGM.getModule(), HasNowait
                                 ? OMPRTL___tgt_target_teams_nowait_mapper
                                 : OMPRTL___tgt_target_teams_mapper),
        OffloadingArgs);
  } else {
    SmallVector<llvm::Value *> OffloadingArgs = {
        RTLoc,
        DeviceID,
        OutlinedFnID,
        PointerNum,
        InputInfo.BasePointersArray.getPointer(),
        InputInfo.PointersArray.getPointer(),
        InputInfo.SizesArray.getPointer(),
        MapTypesArray,
        MapNamesArray,
        InputInfo.MappersArray.getPointer()};
    if (HasNowait) {
      // Add int32_t depNum = 0, void *depList = nullptr, int32_t
      // noAliasDepNum = 0, void *noAliasDepList = nullptr.
      OffloadingArgs.push_back(CGF.Builder.getInt32(0));
      OffloadingArgs.push_back(llvm::ConstantPointerNull::get(CGM.VoidPtrTy));
      OffloadingArgs.push_back(CGF.Builder.getInt32(0));
      OffloadingArgs.push_back(llvm::ConstantPointerNull::get(CGM.VoidPtrTy));
    }
    Return = CGF.EmitRuntimeCall(
        OMPBuilder.getOrCreateRuntimeFunction(
            CGM.getModule(), HasNowait ? OMPRTL___tgt_target_nowait_mapper
                                       : OMPRTL___tgt_target_mapper),
        OffloadingArgs);
  }

  // Check the error code and execute the host version if required.
  llvm::BasicBlock *OffloadFailedBlock =
      CGF.createBasicBlock("omp_offload.failed");
  llvm::BasicBlock *OffloadContBlock =
      CGF.createBasicBlock("omp_offload.cont");
  llvm::Value *Failed = CGF.Builder.CreateIsNotNull(Return);
  CGF.Builder.CreateCondBr(Failed, OffloadFailedBlock, OffloadContBlock);

  CGF.EmitBlock(OffloadFailedBlock);
  if (RequiresOuterTask) {
    CapturedVars.clear();
    CGF.GenerateOpenMPCapturedVars(CS, CapturedVars);
  }
  emitOutlinedFunctionCall(CGF, D.getBeginLoc(), OutlinedFn, CapturedVars);
  CGF.EmitBranch(OffloadContBlock);

  CGF.EmitBlock(OffloadContBlock, /*IsFinished=*/true);
};

// Notify that the host version must be executed.
auto &&ElseGen = [this, &D, OutlinedFn, &CS, &CapturedVars,
                  RequiresOuterTask](CodeGenFunction &CGF,
                                     PrePostActionTy &) {
  if (RequiresOuterTask) {
    CapturedVars.clear();
    CGF.GenerateOpenMPCapturedVars(CS, CapturedVars);
  }
  emitOutlinedFunctionCall(CGF, D.getBeginLoc(), OutlinedFn, CapturedVars);
};

auto &&TargetThenGen = [this, &ThenGen, &D, &InputInfo, &MapTypesArray,
                        &MapNamesArray, &CapturedVars, RequiresOuterTask,
                        &CS](CodeGenFunction &CGF, PrePostActionTy &) {
  // Fill up the arrays with all the captured variables.
  MappableExprsHandler::MapCombinedInfoTy CombinedInfo;

  // Get mappable expression information.
  MappableExprsHandler MEHandler(D, CGF);
  llvm::DenseMap<llvm::Value *, llvm::Value *> LambdaPointers;
  llvm::DenseSet<CanonicalDeclPtr<const Decl>> MappedVarSet;

  auto RI = CS.getCapturedRecordDecl()->field_begin();
  auto *CV = CapturedVars.begin();
  for (CapturedStmt::const_capture_iterator CI = CS.capture_begin(),
                                            CE = CS.capture_end();
       CI != CE; ++CI, ++RI, ++CV) {
    MappableExprsHandler::MapCombinedInfoTy CurInfo;
    MappableExprsHandler::StructRangeInfoTy PartialStruct;

    // VLA sizes are passed to the outlined region by copy and do not have map
    // information associated.
    if (CI->capturesVariableArrayType()) {
      CurInfo.Exprs.push_back(nullptr);
      CurInfo.BasePointers.push_back(*CV);
      CurInfo.Pointers.push_back(*CV);
      CurInfo.Sizes.push_back(CGF.Builder.CreateIntCast(
          CGF.getTypeSize(RI->getType()), CGF.Int64Ty, /*isSigned=*/true));
      // Copy to the device as an argument. No need to retrieve it.
      CurInfo.Types.push_back(MappableExprsHandler::OMP_MAP_LITERAL |
                              MappableExprsHandler::OMP_MAP_TARGET_PARAM |
                              MappableExprsHandler::OMP_MAP_IMPLICIT);
      CurInfo.Mappers.push_back(nullptr);
    } else {
      // If we have any information in the map clause, we use it, otherwise we
      // just do a default mapping.
      MEHandler.generateInfoForCapture(CI, *CV, CurInfo, PartialStruct);
      if (!CI->capturesThis())
        MappedVarSet.insert(CI->getCapturedVar());
      else
        MappedVarSet.insert(nullptr);
      if (CurInfo.BasePointers.empty() && !PartialStruct.Base.isValid())
        MEHandler.generateDefaultMapInfo(*CI, **RI, *CV, CurInfo);
      // Generate correct mapping for variables captured by reference in
      // lambdas.
      if (CI->capturesVariable())
        MEHandler.generateInfoForLambdaCaptures(CI->getCapturedVar(), *CV,
                                                CurInfo, LambdaPointers);
    }
    // We expect to have at least an element of information for this capture.
    assert((!CurInfo.BasePointers.empty() || PartialStruct.Base.isValid()) &&((void)0)
           "Non-existing map pointer for capture!")((void)0);
    assert(CurInfo.BasePointers.size() == CurInfo.Pointers.size() &&((void)0)
           CurInfo.BasePointers.size() == CurInfo.Sizes.size() &&((void)0)
           CurInfo.BasePointers.size() == CurInfo.Types.size() &&((void)0)
           CurInfo.BasePointers.size() == CurInfo.Mappers.size() &&((void)0)
           "Inconsistent map information sizes!")((void)0);

    // If there is an entry in PartialStruct it means we have a struct with
    // individual members mapped. Emit an extra combined entry.
    if (PartialStruct.Base.isValid()) {
      CombinedInfo.append(PartialStruct.PreliminaryMapData);
      MEHandler.emitCombinedEntry(
          CombinedInfo, CurInfo.Types, PartialStruct, nullptr,
          !PartialStruct.PreliminaryMapData.BasePointers.empty());
    }

    // We need to append the results of this capture to what we already have.
    CombinedInfo.append(CurInfo);
  }
  // Adjust MEMBER_OF flags for the lambdas captures.
  MEHandler.adjustMemberOfForLambdaCaptures(
      LambdaPointers, CombinedInfo.BasePointers, CombinedInfo.Pointers,
      CombinedInfo.Types);
  // Map any list items in a map clause that were not captures because they
  // weren't referenced within the construct.
  MEHandler.generateAllInfo(CombinedInfo, MappedVarSet);

  TargetDataInfo Info;
  // Fill up the arrays and create the arguments.
  emitOffloadingArrays(CGF, CombinedInfo, Info, OMPBuilder);
  emitOffloadingArraysArgument(
      CGF, Info.BasePointersArray, Info.PointersArray, Info.SizesArray,
      Info.MapTypesArray, Info.MapNamesArray, Info.MappersArray, Info,
      {/*ForEndTask=*/false});

  InputInfo.NumberOfTargetItems = Info.NumberOfPtrs;
  InputInfo.BasePointersArray =
      Address(Info.BasePointersArray, CGM.getPointerAlign());
  InputInfo.PointersArray =
      Address(Info.PointersArray, CGM.getPointerAlign());
  InputInfo.SizesArray = Address(Info.SizesArray, CGM.getPointerAlign());
  InputInfo.MappersArray = Address(Info.MappersArray, CGM.getPointerAlign());
  MapTypesArray = Info.MapTypesArray;
  MapNamesArray = Info.MapNamesArray;
  if (RequiresOuterTask)
    CGF.EmitOMPTargetTaskBasedDirective(D, ThenGen, InputInfo);
  else
    emitInlinedDirective(CGF, D.getDirectiveKind(), ThenGen);
};

auto &&TargetElseGen = [this, &ElseGen, &D, RequiresOuterTask](
                           CodeGenFunction &CGF, PrePostActionTy &) {
  if (RequiresOuterTask) {
    CodeGenFunction::OMPTargetDataInfo InputInfo;
    CGF.EmitOMPTargetTaskBasedDirective(D, ElseGen, InputInfo);
  } else {
    emitInlinedDirective(CGF, D.getDirectiveKind(), ElseGen);
  }
};

// If we have a target function ID it means that we need to support
// offloading, otherwise, just execute on the host. We need to execute on host
// regardless of the conditional in the if clause if, e.g., the user do not
// specify target triples.
if (OutlinedFnID) {
  if (IfCond) {
    emitIfClause(CGF, IfCond, TargetThenGen, TargetElseGen);
  } else {
    RegionCodeGenTy ThenRCG(TargetThenGen);
    ThenRCG(CGF);
  }
} else {
  RegionCodeGenTy ElseRCG(TargetElseGen);
  ElseRCG(CGF);
}
10535}

10537void CGOpenMPRuntime::scanForTargetRegionsFunctions(const Stmt *S,
                                                  StringRef ParentName) {
if (!S)
  return;

// Codegen OMP target directives that offload compute to the device.
bool RequiresDeviceCodegen =
    isa<OMPExecutableDirective>(S) &&
    isOpenMPTargetExecutionDirective(
        cast<OMPExecutableDirective>(S)->getDirectiveKind());

if (RequiresDeviceCodegen) {
  const auto &E = *cast<OMPExecutableDirective>(S);
  unsigned DeviceID;
  unsigned FileID;
  unsigned Line;
  getTargetEntryUniqueInfo(CGM.getContext(), E.getBeginLoc(), DeviceID,
                           FileID, Line);

  // Is this a target region that should not be emitted as an entry point? If
  // so just signal we are done with this target region.
  if (!OffloadEntriesInfoManager.hasTargetRegionEntryInfo(DeviceID, FileID,
                                                          ParentName, Line))
    return;

  switch (E.getDirectiveKind()) {
  case OMPD_target:
    CodeGenFunction::EmitOMPTargetDeviceFunction(CGM, ParentName,
                                                 cast<OMPTargetDirective>(E));
    break;
  case OMPD_target_parallel:
    CodeGenFunction::EmitOMPTargetParallelDeviceFunction(
        CGM, ParentName, cast<OMPTargetParallelDirective>(E));
    break;
  case OMPD_target_teams:
    CodeGenFunction::EmitOMPTargetTeamsDeviceFunction(
        CGM, ParentName, cast<OMPTargetTeamsDirective>(E));
    break;
  case OMPD_target_teams_distribute:
    CodeGenFunction::EmitOMPTargetTeamsDistributeDeviceFunction(
        CGM, ParentName, cast<OMPTargetTeamsDistributeDirective>(E));
    break;
  case OMPD_target_teams_distribute_simd:
    CodeGenFunction::EmitOMPTargetTeamsDistributeSimdDeviceFunction(
        CGM, ParentName, cast<OMPTargetTeamsDistributeSimdDirective>(E));
    break;
  case OMPD_target_parallel_for:
    CodeGenFunction::EmitOMPTargetParallelForDeviceFunction(
        CGM, ParentName, cast<OMPTargetParallelForDirective>(E));
    break;
  case OMPD_target_parallel_for_simd:
    CodeGenFunction::EmitOMPTargetParallelForSimdDeviceFunction(
        CGM, ParentName, cast<OMPTargetParallelForSimdDirective>(E));
    break;
  case OMPD_target_simd:
    CodeGenFunction::EmitOMPTargetSimdDeviceFunction(
        CGM, ParentName, cast<OMPTargetSimdDirective>(E));
    break;
  case OMPD_target_teams_distribute_parallel_for:
    CodeGenFunction::EmitOMPTargetTeamsDistributeParallelForDeviceFunction(
        CGM, ParentName,
        cast<OMPTargetTeamsDistributeParallelForDirective>(E));
    break;
  case OMPD_target_teams_distribute_parallel_for_simd:
    CodeGenFunction::
        EmitOMPTargetTeamsDistributeParallelForSimdDeviceFunction(
            CGM, ParentName,
            cast<OMPTargetTeamsDistributeParallelForSimdDirective>(E));
    break;
  case OMPD_parallel:
  case OMPD_for:
  case OMPD_parallel_for:
  case OMPD_parallel_master:
  case OMPD_parallel_sections:
  case OMPD_for_simd:
  case OMPD_parallel_for_simd:
  case OMPD_cancel:
  case OMPD_cancellation_point:
  case OMPD_ordered:
  case OMPD_threadprivate:
  case OMPD_allocate:
  case OMPD_task:
  case OMPD_simd:
  case OMPD_tile:
  case OMPD_unroll:
  case OMPD_sections:
  case OMPD_section:
  case OMPD_single:
  case OMPD_master:
  case OMPD_critical:
  case OMPD_taskyield:
  case OMPD_barrier:
  case OMPD_taskwait:
  case OMPD_taskgroup:
  case OMPD_atomic:
  case OMPD_flush:
  case OMPD_depobj:
  case OMPD_scan:
  case OMPD_teams:
  case OMPD_target_data:
  case OMPD_target_exit_data:
  case OMPD_target_enter_data:
  case OMPD_distribute:
  case OMPD_distribute_simd:
  case OMPD_distribute_parallel_for:
  case OMPD_distribute_parallel_for_simd:
  case OMPD_teams_distribute:
  case OMPD_teams_distribute_simd:
  case OMPD_teams_distribute_parallel_for:
  case OMPD_teams_distribute_parallel_for_simd:
  case OMPD_target_update:
  case OMPD_declare_simd:
  case OMPD_declare_variant:
  case OMPD_begin_declare_variant:
  case OMPD_end_declare_variant:
  case OMPD_declare_target:
  case OMPD_end_declare_target:
  case OMPD_declare_reduction:
  case OMPD_declare_mapper:
  case OMPD_taskloop:
  case OMPD_taskloop_simd:
  case OMPD_master_taskloop:
  case OMPD_master_taskloop_simd:
  case OMPD_parallel_master_taskloop:
  case OMPD_parallel_master_taskloop_simd:
  case OMPD_requires:
  case OMPD_unknown:
  default:
    llvm_unreachable("Unknown target directive for OpenMP device codegen.")__builtin_unreachable();
  }
  return;
}

if (const auto *E = dyn_cast<OMPExecutableDirective>(S)) {
  if (!E->hasAssociatedStmt() || !E->getAssociatedStmt())
    return;

  scanForTargetRegionsFunctions(E->getRawStmt(), ParentName);
  return;
}

// If this is a lambda function, look into its body.
if (const auto *L = dyn_cast<LambdaExpr>(S))
  S = L->getBody();

// Keep looking for target regions recursively.
for (const Stmt *II : S->children())
  scanForTargetRegionsFunctions(II, ParentName);
10685}

10687static bool isAssumedToBeNotEmitted(const ValueDecl *VD, bool IsDevice) {
Optional<OMPDeclareTargetDeclAttr::DevTypeTy> DevTy =
    OMPDeclareTargetDeclAttr::getDeviceType(VD);
if (!DevTy)
  return false;
// Do not emit device_type(nohost) functions for the host.
if (!IsDevice && DevTy == OMPDeclareTargetDeclAttr::DT_NoHost)
  return true;
// Do not emit device_type(host) functions for the device.
if (IsDevice && DevTy == OMPDeclareTargetDeclAttr::DT_Host)
  return true;
return false;
10699}

10701bool CGOpenMPRuntime::emitTargetFunctions(GlobalDecl GD) {
// If emitting code for the host, we do not process FD here. Instead we do
// the normal code generation.
if (!CGM.getLangOpts().OpenMPIsDevice) {
  if (const auto *FD = dyn_cast<FunctionDecl>(GD.getDecl()))
    if (isAssumedToBeNotEmitted(cast<ValueDecl>(FD),
                                CGM.getLangOpts().OpenMPIsDevice))
      return true;
  return false;
}

const ValueDecl *VD = cast<ValueDecl>(GD.getDecl());
// Try to detect target regions in the function.
if (const auto *FD = dyn_cast<FunctionDecl>(VD)) {
  StringRef Name = CGM.getMangledName(GD);
  scanForTargetRegionsFunctions(FD->getBody(), Name);
  if (isAssumedToBeNotEmitted(cast<ValueDecl>(FD),
                              CGM.getLangOpts().OpenMPIsDevice))
    return true;
}

// Do not to emit function if it is not marked as declare target.
return !OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(VD) &&
       AlreadyEmittedTargetDecls.count(VD) == 0;
10725}

10727bool CGOpenMPRuntime::emitTargetGlobalVariable(GlobalDecl GD) {
if (isAssumedToBeNotEmitted(cast<ValueDecl>(GD.getDecl()),
                            CGM.getLangOpts().OpenMPIsDevice))
  return true;

if (!CGM.getLangOpts().OpenMPIsDevice)
  return false;

// Check if there are Ctors/Dtors in this declaration and look for target
// regions in it. We use the complete variant to produce the kernel name
// mangling.
QualType RDTy = cast<VarDecl>(GD.getDecl())->getType();
if (const auto *RD = RDTy->getBaseElementTypeUnsafe()->getAsCXXRecordDecl()) {
  for (const CXXConstructorDecl *Ctor : RD->ctors()) {
    StringRef ParentName =
        CGM.getMangledName(GlobalDecl(Ctor, Ctor_Complete));
    scanForTargetRegionsFunctions(Ctor->getBody(), ParentName);
  }
  if (const CXXDestructorDecl *Dtor = RD->getDestructor()) {
    StringRef ParentName =
        CGM.getMangledName(GlobalDecl(Dtor, Dtor_Complete));
    scanForTargetRegionsFunctions(Dtor->getBody(), ParentName);
  }
}

// Do not to emit variable if it is not marked as declare target.
llvm::Optional<OMPDeclareTargetDeclAttr::MapTypeTy> Res =
    OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(
        cast<VarDecl>(GD.getDecl()));
if (!Res || *Res == OMPDeclareTargetDeclAttr::MT_Link ||
    (*Res == OMPDeclareTargetDeclAttr::MT_To &&
     HasRequiresUnifiedSharedMemory)) {
  DeferredGlobalVariables.insert(cast<VarDecl>(GD.getDecl()));
  return true;
}
return false;
10763}

10765void CGOpenMPRuntime::registerTargetGlobalVariable(const VarDecl *VD,
                                                 llvm::Constant *Addr) {
if (CGM.getLangOpts().OMPTargetTriples.empty() &&
    !CGM.getLangOpts().OpenMPIsDevice)
  return;

// If we have host/nohost variables, they do not need to be registered.
Optional<OMPDeclareTargetDeclAttr::DevTypeTy> DevTy =
    OMPDeclareTargetDeclAttr::getDeviceType(VD);
if (DevTy && DevTy.getValue() != OMPDeclareTargetDeclAttr::DT_Any)
  return;

llvm::Optional<OMPDeclareTargetDeclAttr::MapTypeTy> Res =
    OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(VD);
if (!Res) {
  if (CGM.getLangOpts().OpenMPIsDevice) {
    // Register non-target variables being emitted in device code (debug info
    // may cause this).
    StringRef VarName = CGM.getMangledName(VD);
    EmittedNonTargetVariables.try_emplace(VarName, Addr);
  }
  return;
}
// Register declare target variables.
OffloadEntriesInfoManagerTy::OMPTargetGlobalVarEntryKind Flags;
StringRef VarName;
CharUnits VarSize;
llvm::GlobalValue::LinkageTypes Linkage;

if (*Res == OMPDeclareTargetDeclAttr::MT_To &&
    !HasRequiresUnifiedSharedMemory) {
  Flags = OffloadEntriesInfoManagerTy::OMPTargetGlobalVarEntryTo;
  VarName = CGM.getMangledName(VD);
  if (VD->hasDefinition(CGM.getContext()) != VarDecl::DeclarationOnly) {
    VarSize = CGM.getContext().getTypeSizeInChars(VD->getType());
    assert(!VarSize.isZero() && "Expected non-zero size of the variable")((void)0);
  } else {
    VarSize = CharUnits::Zero();
  }
  Linkage = CGM.getLLVMLinkageVarDefinition(VD, /*IsConstant=*/false);
  // Temp solution to prevent optimizations of the internal variables.
  if (CGM.getLangOpts().OpenMPIsDevice && !VD->isExternallyVisible()) {
    // Do not create a "ref-variable" if the original is not also available
    // on the host.
    if (!OffloadEntriesInfoManager.hasDeviceGlobalVarEntryInfo(VarName))
      return;
    std::string RefName = getName({VarName, "ref"});
    if (!CGM.GetGlobalValue(RefName)) {
      llvm::Constant *AddrRef =
          getOrCreateInternalVariable(Addr->getType(), RefName);
      auto *GVAddrRef = cast<llvm::GlobalVariable>(AddrRef);
      GVAddrRef->setConstant(/*Val=*/true);
      GVAddrRef->setLinkage(llvm::GlobalValue::InternalLinkage);
      GVAddrRef->setInitializer(Addr);
      CGM.addCompilerUsedGlobal(GVAddrRef);
    }
  }
} else {
  assert(((*Res == OMPDeclareTargetDeclAttr::MT_Link) ||((void)0)
          (*Res == OMPDeclareTargetDeclAttr::MT_To &&((void)0)
           HasRequiresUnifiedSharedMemory)) &&((void)0)
         "Declare target attribute must link or to with unified memory.")((void)0);
  if (*Res == OMPDeclareTargetDeclAttr::MT_Link)
    Flags = OffloadEntriesInfoManagerTy::OMPTargetGlobalVarEntryLink;
  else
    Flags = OffloadEntriesInfoManagerTy::OMPTargetGlobalVarEntryTo;

  if (CGM.getLangOpts().OpenMPIsDevice) {
    VarName = Addr->getName();
    Addr = nullptr;
  } else {
    VarName = getAddrOfDeclareTargetVar(VD).getName();
    Addr = cast<llvm::Constant>(getAddrOfDeclareTargetVar(VD).getPointer());
  }
  VarSize = CGM.getPointerSize();
  Linkage = llvm::GlobalValue::WeakAnyLinkage;
}

OffloadEntriesInfoManager.registerDeviceGlobalVarEntryInfo(
    VarName, Addr, VarSize, Flags, Linkage);
10845}

10847bool CGOpenMPRuntime::emitTargetGlobal(GlobalDecl GD) {
if (isa<FunctionDecl>(GD.getDecl()) ||
    isa<OMPDeclareReductionDecl>(GD.getDecl()))
  return emitTargetFunctions(GD);

return emitTargetGlobalVariable(GD);
10853}

10855void CGOpenMPRuntime::emitDeferredTargetDecls() const {
for (const VarDecl *VD : DeferredGlobalVariables) {
  llvm::Optional<OMPDeclareTargetDeclAttr::MapTypeTy> Res =
      OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(VD);
  if (!Res)
    continue;
  if (*Res == OMPDeclareTargetDeclAttr::MT_To &&
      !HasRequiresUnifiedSharedMemory) {
    CGM.EmitGlobal(VD);
  } else {
    assert((*Res == OMPDeclareTargetDeclAttr::MT_Link ||((void)0)
            (*Res == OMPDeclareTargetDeclAttr::MT_To &&((void)0)
             HasRequiresUnifiedSharedMemory)) &&((void)0)
           "Expected link clause or to clause with unified memory.")((void)0);
    (void)CGM.getOpenMPRuntime().getAddrOfDeclareTargetVar(VD);
  }
}
10872}

10874void CGOpenMPRuntime::adjustTargetSpecificDataForLambdas(
  CodeGenFunction &CGF, const OMPExecutableDirective &D) const {
assert(isOpenMPTargetExecutionDirective(D.getDirectiveKind()) &&((void)0)
       " Expected target-based directive.")((void)0);
10878}

10880void CGOpenMPRuntime::processRequiresDirective(const OMPRequiresDecl *D) {
for (const OMPClause *Clause : D->clauselists()) {
  if (Clause->getClauseKind() == OMPC_unified_shared_memory) {
    HasRequiresUnifiedSharedMemory = true;
  } else if (const auto *AC =
                 dyn_cast<OMPAtomicDefaultMemOrderClause>(Clause)) {
    switch (AC->getAtomicDefaultMemOrderKind()) {
    case OMPC_ATOMIC_DEFAULT_MEM_ORDER_acq_rel:
      RequiresAtomicOrdering = llvm::AtomicOrdering::AcquireRelease;
      break;
    case OMPC_ATOMIC_DEFAULT_MEM_ORDER_seq_cst:
      RequiresAtomicOrdering = llvm::AtomicOrdering::SequentiallyConsistent;
      break;
    case OMPC_ATOMIC_DEFAULT_MEM_ORDER_relaxed:
      RequiresAtomicOrdering = llvm::AtomicOrdering::Monotonic;
      break;
    case OMPC_ATOMIC_DEFAULT_MEM_ORDER_unknown:
      break;
    }
  }
}
10901}

10903llvm::AtomicOrdering CGOpenMPRuntime::getDefaultMemoryOrdering() const {
return RequiresAtomicOrdering;
10905}

10907bool CGOpenMPRuntime::hasAllocateAttributeForGlobalVar(const VarDecl *VD,
                                                     LangAS &AS) {
if (!VD || !VD->hasAttr<OMPAllocateDeclAttr>())
  return false;
const auto *A = VD->getAttr<OMPAllocateDeclAttr>();
switch(A->getAllocatorType()) {
case OMPAllocateDeclAttr::OMPNullMemAlloc:
case OMPAllocateDeclAttr::OMPDefaultMemAlloc:
// Not supported, fallback to the default mem space.
case OMPAllocateDeclAttr::OMPLargeCapMemAlloc:
case OMPAllocateDeclAttr::OMPCGroupMemAlloc:
case OMPAllocateDeclAttr::OMPHighBWMemAlloc:
case OMPAllocateDeclAttr::OMPLowLatMemAlloc:
case OMPAllocateDeclAttr::OMPThreadMemAlloc:
case OMPAllocateDeclAttr::OMPConstMemAlloc:
case OMPAllocateDeclAttr::OMPPTeamMemAlloc:
  AS = LangAS::Default;
  return true;
case OMPAllocateDeclAttr::OMPUserDefinedMemAlloc:
  llvm_unreachable("Expected predefined allocator for the variables with the "__builtin_unreachable()
                   "static storage.")__builtin_unreachable();
}
return false;
10930}

10932bool CGOpenMPRuntime::hasRequiresUnifiedSharedMemory() const {
return HasRequiresUnifiedSharedMemory;
10934}

10936CGOpenMPRuntime::DisableAutoDeclareTargetRAII::DisableAutoDeclareTargetRAII(
  CodeGenModule &CGM)
  : CGM(CGM) {
if (CGM.getLangOpts().OpenMPIsDevice) {
  SavedShouldMarkAsGlobal = CGM.getOpenMPRuntime().ShouldMarkAsGlobal;
  CGM.getOpenMPRuntime().ShouldMarkAsGlobal = false;
}
10943}

10945CGOpenMPRuntime::DisableAutoDeclareTargetRAII::~DisableAutoDeclareTargetRAII() {
if (CGM.getLangOpts().OpenMPIsDevice)
  CGM.getOpenMPRuntime().ShouldMarkAsGlobal = SavedShouldMarkAsGlobal;
10948}

10950bool CGOpenMPRuntime::markAsGlobalTarget(GlobalDecl GD) {
if (!CGM.getLangOpts().OpenMPIsDevice || !ShouldMarkAsGlobal)
  return true;

const auto *D = cast<FunctionDecl>(GD.getDecl());
// Do not to emit function if it is marked as declare target as it was already
// emitted.
if (OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(D)) {
  if (D->hasBody() && AlreadyEmittedTargetDecls.count(D) == 0) {
    if (auto *F = dyn_cast_or_null<llvm::Function>(
            CGM.GetGlobalValue(CGM.getMangledName(GD))))
      return !F->isDeclaration();
    return false;
  }
  return true;
}

return !AlreadyEmittedTargetDecls.insert(D).second;
10968}

10970llvm::Function *CGOpenMPRuntime::emitRequiresDirectiveRegFun() {
// If we don't have entries or if we are emitting code for the device, we
// don't need to do anything.
if (CGM.getLangOpts().OMPTargetTriples.empty() ||
    CGM.getLangOpts().OpenMPSimd || CGM.getLangOpts().OpenMPIsDevice ||
    (OffloadEntriesInfoManager.empty() &&
     !HasEmittedDeclareTargetRegion &&
     !HasEmittedTargetRegion))
  return nullptr;

// Create and register the function that handles the requires directives.
ASTContext &C = CGM.getContext();

llvm::Function *RequiresRegFn;
{
  CodeGenFunction CGF(CGM);
  const auto &FI = CGM.getTypes().arrangeNullaryFunction();
  llvm::FunctionType *FTy = CGM.getTypes().GetFunctionType(FI);
  std::string ReqName = getName({"omp_offloading", "requires_reg"});
  RequiresRegFn = CGM.CreateGlobalInitOrCleanUpFunction(FTy, ReqName, FI);
  CGF.StartFunction(GlobalDecl(), C.VoidTy, RequiresRegFn, FI, {});
  OpenMPOffloadingRequiresDirFlags Flags = OMP_REQ_NONE;
  // TODO: check for other requires clauses.
  // The requires directive takes effect only when a target region is
  // present in the compilation unit. Otherwise it is ignored and not
  // passed to the runtime. This avoids the runtime from throwing an error
  // for mismatching requires clauses across compilation units that don't
  // contain at least 1 target region.
  assert((HasEmittedTargetRegion ||((void)0)
          HasEmittedDeclareTargetRegion ||((void)0)
          !OffloadEntriesInfoManager.empty()) &&((void)0)
         "Target or declare target region expected.")((void)0);
  if (HasRequiresUnifiedSharedMemory)
    Flags = OMP_REQ_UNIFIED_SHARED_MEMORY;
  CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                          CGM.getModule(), OMPRTL___tgt_register_requires),
                      llvm::ConstantInt::get(CGM.Int64Ty, Flags));
  CGF.FinishFunction();
}
return RequiresRegFn;
11010}

11012void CGOpenMPRuntime::emitTeamsCall(CodeGenFunction &CGF,
                                  const OMPExecutableDirective &D,
                                  SourceLocation Loc,
                                  llvm::Function *OutlinedFn,
                                  ArrayRef<llvm::Value *> CapturedVars) {
if (!CGF.HaveInsertPoint())
  return;

llvm::Value *RTLoc = emitUpdateLocation(CGF, Loc);
CodeGenFunction::RunCleanupsScope Scope(CGF);

// Build call __kmpc_fork_teams(loc, n, microtask, var1, .., varn);
llvm::Value *Args[] = {
    RTLoc,
    CGF.Builder.getInt32(CapturedVars.size()), // Number of captured vars
    CGF.Builder.CreateBitCast(OutlinedFn, getKmpc_MicroPointerTy())};
llvm::SmallVector<llvm::Value *, 16> RealArgs;
RealArgs.append(std::begin(Args), std::end(Args));
RealArgs.append(CapturedVars.begin(), CapturedVars.end());

llvm::FunctionCallee RTLFn = OMPBuilder.getOrCreateRuntimeFunction(
    CGM.getModule(), OMPRTL___kmpc_fork_teams);
CGF.EmitRuntimeCall(RTLFn, RealArgs);
11035}

11037void CGOpenMPRuntime::emitNumTeamsClause(CodeGenFunction &CGF,
                                       const Expr *NumTeams,
                                       const Expr *ThreadLimit,
                                       SourceLocation Loc) {
if (!CGF.HaveInsertPoint())
  return;

llvm::Value *RTLoc = emitUpdateLocation(CGF, Loc);

llvm::Value *NumTeamsVal =
    NumTeams
        ? CGF.Builder.CreateIntCast(CGF.EmitScalarExpr(NumTeams),
                                    CGF.CGM.Int32Ty, /* isSigned = */ true)
        : CGF.Builder.getInt32(0);

llvm::Value *ThreadLimitVal =
    ThreadLimit
        ? CGF.Builder.CreateIntCast(CGF.EmitScalarExpr(ThreadLimit),
                                    CGF.CGM.Int32Ty, /* isSigned = */ true)
        : CGF.Builder.getInt32(0);

// Build call __kmpc_push_num_teamss(&loc, global_tid, num_teams, thread_limit)
llvm::Value *PushNumTeamsArgs[] = {RTLoc, getThreadID(CGF, Loc), NumTeamsVal,
                                   ThreadLimitVal};
CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                        CGM.getModule(), OMPRTL___kmpc_push_num_teams),
                    PushNumTeamsArgs);
11064}

11066void CGOpenMPRuntime::emitTargetDataCalls(
  CodeGenFunction &CGF, const OMPExecutableDirective &D, const Expr *IfCond,
  const Expr *Device, const RegionCodeGenTy &CodeGen, TargetDataInfo &Info) {
if (!CGF.HaveInsertPoint())
  return;

// Action used to replace the default codegen action and turn privatization
// off.
PrePostActionTy NoPrivAction;

// Generate the code for the opening of the data environment. Capture all the
// arguments of the runtime call by reference because they are used in the
// closing of the region.
auto &&BeginThenGen = [this, &D, Device, &Info,
                       &CodeGen](CodeGenFunction &CGF, PrePostActionTy &) {
  // Fill up the arrays with all the mapped variables.
  MappableExprsHandler::MapCombinedInfoTy CombinedInfo;

  // Get map clause information.
  MappableExprsHandler MEHandler(D, CGF);
  MEHandler.generateAllInfo(CombinedInfo);

  // Fill up the arrays and create the arguments.
  emitOffloadingArrays(CGF, CombinedInfo, Info, OMPBuilder,
                       /*IsNonContiguous=*/true);

  llvm::Value *BasePointersArrayArg = nullptr;
  llvm::Value *PointersArrayArg = nullptr;
  llvm::Value *SizesArrayArg = nullptr;
  llvm::Value *MapTypesArrayArg = nullptr;
  llvm::Value *MapNamesArrayArg = nullptr;
  llvm::Value *MappersArrayArg = nullptr;
  emitOffloadingArraysArgument(CGF, BasePointersArrayArg, PointersArrayArg,
                               SizesArrayArg, MapTypesArrayArg,
                               MapNamesArrayArg, MappersArrayArg, Info);

  // Emit device ID if any.
  llvm::Value *DeviceID = nullptr;
  if (Device) {
    DeviceID = CGF.Builder.CreateIntCast(CGF.EmitScalarExpr(Device),
                                         CGF.Int64Ty, /*isSigned=*/true);
  } else {
    DeviceID = CGF.Builder.getInt64(OMP_DEVICEID_UNDEF);
  }

  // Emit the number of elements in the offloading arrays.
  llvm::Value *PointerNum = CGF.Builder.getInt32(Info.NumberOfPtrs);
  //
  // Source location for the ident struct
  llvm::Value *RTLoc = emitUpdateLocation(CGF, D.getBeginLoc());

  llvm::Value *OffloadingArgs[] = {RTLoc,
                                   DeviceID,
                                   PointerNum,
                                   BasePointersArrayArg,
                                   PointersArrayArg,
                                   SizesArrayArg,
                                   MapTypesArrayArg,
                                   MapNamesArrayArg,
                                   MappersArrayArg};
  CGF.EmitRuntimeCall(
      OMPBuilder.getOrCreateRuntimeFunction(
          CGM.getModule(), OMPRTL___tgt_target_data_begin_mapper),
      OffloadingArgs);

  // If device pointer privatization is required, emit the body of the region
  // here. It will have to be duplicated: with and without privatization.
  if (!Info.CaptureDeviceAddrMap.empty())
    CodeGen(CGF);
};

// Generate code for the closing of the data region.
auto &&EndThenGen = [this, Device, &Info, &D](CodeGenFunction &CGF,
                                              PrePostActionTy &) {
  assert(Info.isValid() && "Invalid data environment closing arguments.")((void)0);

  llvm::Value *BasePointersArrayArg = nullptr;
  llvm::Value *PointersArrayArg = nullptr;
  llvm::Value *SizesArrayArg = nullptr;
  llvm::Value *MapTypesArrayArg = nullptr;
  llvm::Value *MapNamesArrayArg = nullptr;
  llvm::Value *MappersArrayArg = nullptr;
  emitOffloadingArraysArgument(CGF, BasePointersArrayArg, PointersArrayArg,
                               SizesArrayArg, MapTypesArrayArg,
                               MapNamesArrayArg, MappersArrayArg, Info,
                               {/*ForEndCall=*/true});

  // Emit device ID if any.
  llvm::Value *DeviceID = nullptr;
  if (Device) {
    DeviceID = CGF.Builder.CreateIntCast(CGF.EmitScalarExpr(Device),
                                         CGF.Int64Ty, /*isSigned=*/true);
  } else {
    DeviceID = CGF.Builder.getInt64(OMP_DEVICEID_UNDEF);
  }

  // Emit the number of elements in the offloading arrays.
  llvm::Value *PointerNum = CGF.Builder.getInt32(Info.NumberOfPtrs);

  // Source location for the ident struct
  llvm::Value *RTLoc = emitUpdateLocation(CGF, D.getBeginLoc());

  llvm::Value *OffloadingArgs[] = {RTLoc,
                                   DeviceID,
                                   PointerNum,
                                   BasePointersArrayArg,
                                   PointersArrayArg,
                                   SizesArrayArg,
                                   MapTypesArrayArg,
                                   MapNamesArrayArg,
                                   MappersArrayArg};
  CGF.EmitRuntimeCall(
      OMPBuilder.getOrCreateRuntimeFunction(
          CGM.getModule(), OMPRTL___tgt_target_data_end_mapper),
      OffloadingArgs);
};

// If we need device pointer privatization, we need to emit the body of the
// region with no privatization in the 'else' branch of the conditional.
// Otherwise, we don't have to do anything.
auto &&BeginElseGen = [&Info, &CodeGen, &NoPrivAction](CodeGenFunction &CGF,
                                                       PrePostActionTy &) {
  if (!Info.CaptureDeviceAddrMap.empty()) {
    CodeGen.setAction(NoPrivAction);
    CodeGen(CGF);
  }
};

// We don't have to do anything to close the region if the if clause evaluates
// to false.
auto &&EndElseGen = [](CodeGenFunction &CGF, PrePostActionTy &) {};

if (IfCond) {
  emitIfClause(CGF, IfCond, BeginThenGen, BeginElseGen);
} else {
  RegionCodeGenTy RCG(BeginThenGen);
  RCG(CGF);
}

// If we don't require privatization of device pointers, we emit the body in
// between the runtime calls. This avoids duplicating the body code.
if (Info.CaptureDeviceAddrMap.empty()) {
  CodeGen.setAction(NoPrivAction);
  CodeGen(CGF);
}

if (IfCond) {
  emitIfClause(CGF, IfCond, EndThenGen, EndElseGen);
} else {
  RegionCodeGenTy RCG(EndThenGen);
  RCG(CGF);
}
11218}

11220void CGOpenMPRuntime::emitTargetDataStandAloneCall(
  CodeGenFunction &CGF, const OMPExecutableDirective &D, const Expr *IfCond,
  const Expr *Device) {
if (!CGF.HaveInsertPoint())
  return;

assert((isa<OMPTargetEnterDataDirective>(D) ||((void)0)
        isa<OMPTargetExitDataDirective>(D) ||((void)0)
        isa<OMPTargetUpdateDirective>(D)) &&((void)0)
       "Expecting either target enter, exit data, or update directives.")((void)0);

CodeGenFunction::OMPTargetDataInfo InputInfo;
llvm::Value *MapTypesArray = nullptr;
llvm::Value *MapNamesArray = nullptr;
// Generate the code for the opening of the data environment.
auto &&ThenGen = [this, &D, Device, &InputInfo, &MapTypesArray,
                  &MapNamesArray](CodeGenFunction &CGF, PrePostActionTy &) {
  // Emit device ID if any.
  llvm::Value *DeviceID = nullptr;
  if (Device) {
    DeviceID = CGF.Builder.CreateIntCast(CGF.EmitScalarExpr(Device),
                                         CGF.Int64Ty, /*isSigned=*/true);
  } else {
    DeviceID = CGF.Builder.getInt64(OMP_DEVICEID_UNDEF);
  }

  // Emit the number of elements in the offloading arrays.
  llvm::Constant *PointerNum =
      CGF.Builder.getInt32(InputInfo.NumberOfTargetItems);

  // Source location for the ident struct
  llvm::Value *RTLoc = emitUpdateLocation(CGF, D.getBeginLoc());

  llvm::Value *OffloadingArgs[] = {RTLoc,
                                   DeviceID,
                                   PointerNum,
                                   InputInfo.BasePointersArray.getPointer(),
                                   InputInfo.PointersArray.getPointer(),
                                   InputInfo.SizesArray.getPointer(),
                                   MapTypesArray,
                                   MapNamesArray,
                                   InputInfo.MappersArray.getPointer()};

  // Select the right runtime function call for each standalone
  // directive.
  const bool HasNowait = D.hasClausesOfKind<OMPNowaitClause>();
  RuntimeFunction RTLFn;
  switch (D.getDirectiveKind()) {
  case OMPD_target_enter_data:
    RTLFn = HasNowait ? OMPRTL___tgt_target_data_begin_nowait_mapper
                      : OMPRTL___tgt_target_data_begin_mapper;
    break;
  case OMPD_target_exit_data:
    RTLFn = HasNowait ? OMPRTL___tgt_target_data_end_nowait_mapper
                      : OMPRTL___tgt_target_data_end_mapper;
    break;
  case OMPD_target_update:
    RTLFn = HasNowait ? OMPRTL___tgt_target_data_update_nowait_mapper
                      : OMPRTL___tgt_target_data_update_mapper;
    break;
  case OMPD_parallel:
  case OMPD_for:
  case OMPD_parallel_for:
  case OMPD_parallel_master:
  case OMPD_parallel_sections:
  case OMPD_for_simd:
  case OMPD_parallel_for_simd:
  case OMPD_cancel:
  case OMPD_cancellation_point:
  case OMPD_ordered:
  case OMPD_threadprivate:
  case OMPD_allocate:
  case OMPD_task:
  case OMPD_simd:
  case OMPD_tile:
  case OMPD_unroll:
  case OMPD_sections:
  case OMPD_section:
  case OMPD_single:
  case OMPD_master:
  case OMPD_critical:
  case OMPD_taskyield:
  case OMPD_barrier:
  case OMPD_taskwait:
  case OMPD_taskgroup:
  case OMPD_atomic:
  case OMPD_flush:
  case OMPD_depobj:
  case OMPD_scan:
  case OMPD_teams:
  case OMPD_target_data:
  case OMPD_distribute:
  case OMPD_distribute_simd:
  case OMPD_distribute_parallel_for:
  case OMPD_distribute_parallel_for_simd:
  case OMPD_teams_distribute:
  case OMPD_teams_distribute_simd:
  case OMPD_teams_distribute_parallel_for:
  case OMPD_teams_distribute_parallel_for_simd:
  case OMPD_declare_simd:
  case OMPD_declare_variant:
  case OMPD_begin_declare_variant:
  case OMPD_end_declare_variant:
  case OMPD_declare_target:
  case OMPD_end_declare_target:
  case OMPD_declare_reduction:
  case OMPD_declare_mapper:
  case OMPD_taskloop:
  case OMPD_taskloop_simd:
  case OMPD_master_taskloop:
  case OMPD_master_taskloop_simd:
  case OMPD_parallel_master_taskloop:
  case OMPD_parallel_master_taskloop_simd:
  case OMPD_target:
  case OMPD_target_simd:
  case OMPD_target_teams_distribute:
  case OMPD_target_teams_distribute_simd:
  case OMPD_target_teams_distribute_parallel_for:
  case OMPD_target_teams_distribute_parallel_for_simd:
  case OMPD_target_teams:
  case OMPD_target_parallel:
  case OMPD_target_parallel_for:
  case OMPD_target_parallel_for_simd:
  case OMPD_requires:
  case OMPD_unknown:
  default:
    llvm_unreachable("Unexpected standalone target data directive.")__builtin_unreachable();
    break;
  }
  CGF.EmitRuntimeCall(
      OMPBuilder.getOrCreateRuntimeFunction(CGM.getModule(), RTLFn),
      OffloadingArgs);
};

auto &&TargetThenGen = [this, &ThenGen, &D, &InputInfo, &MapTypesArray,
                        &MapNamesArray](CodeGenFunction &CGF,
                                        PrePostActionTy &) {
  // Fill up the arrays with all the mapped variables.
  MappableExprsHandler::MapCombinedInfoTy CombinedInfo;

  // Get map clause information.
  MappableExprsHandler MEHandler(D, CGF);
  MEHandler.generateAllInfo(CombinedInfo);

  TargetDataInfo Info;
  // Fill up the arrays and create the arguments.
  emitOffloadingArrays(CGF, CombinedInfo, Info, OMPBuilder,
                       /*IsNonContiguous=*/true);
  bool RequiresOuterTask = D.hasClausesOfKind<OMPDependClause>() ||
                           D.hasClausesOfKind<OMPNowaitClause>();
  emitOffloadingArraysArgument(
      CGF, Info.BasePointersArray, Info.PointersArray, Info.SizesArray,
      Info.MapTypesArray, Info.MapNamesArray, Info.MappersArray, Info,
      {/*ForEndTask=*/false});
  InputInfo.NumberOfTargetItems = Info.NumberOfPtrs;
  InputInfo.BasePointersArray =
      Address(Info.BasePointersArray, CGM.getPointerAlign());
  InputInfo.PointersArray =
      Address(Info.PointersArray, CGM.getPointerAlign());
  InputInfo.SizesArray =
      Address(Info.SizesArray, CGM.getPointerAlign());
  InputInfo.MappersArray = Address(Info.MappersArray, CGM.getPointerAlign());
  MapTypesArray = Info.MapTypesArray;
  MapNamesArray = Info.MapNamesArray;
  if (RequiresOuterTask)
    CGF.EmitOMPTargetTaskBasedDirective(D, ThenGen, InputInfo);
  else
    emitInlinedDirective(CGF, D.getDirectiveKind(), ThenGen);
};

if (IfCond) {
  emitIfClause(CGF, IfCond, TargetThenGen,
               [](CodeGenFunction &CGF, PrePostActionTy &) {});
} else {
  RegionCodeGenTy ThenRCG(TargetThenGen);
  ThenRCG(CGF);
}
11397}

11399namespace {
/// Kind of parameter in a function with 'declare simd' directive.
enum ParamKindTy { LinearWithVarStride, Linear, Uniform, Vector };
/// Attribute set of the parameter.
struct ParamAttrTy {
  ParamKindTy Kind = Vector;
  llvm::APSInt StrideOrArg;
  llvm::APSInt Alignment;
};
11408} // namespace

11410static unsigned evaluateCDTSize(const FunctionDecl *FD,
                              ArrayRef<ParamAttrTy> ParamAttrs) {
// Every vector variant of a SIMD-enabled function has a vector length (VLEN).
// If OpenMP clause "simdlen" is used, the VLEN is the value of the argument
// of that clause. The VLEN value must be power of 2.
// In other case the notion of the function`s "characteristic data type" (CDT)
// is used to compute the vector length.
// CDT is defined in the following order:
//   a) For non-void function, the CDT is the return type.
//   b) If the function has any non-uniform, non-linear parameters, then the
//   CDT is the type of the first such parameter.
//   c) If the CDT determined by a) or b) above is struct, union, or class
//   type which is pass-by-value (except for the type that maps to the
//   built-in complex data type), the characteristic data type is int.
//   d) If none of the above three cases is applicable, the CDT is int.
// The VLEN is then determined based on the CDT and the size of vector
// register of that ISA for which current vector version is generated. The
// VLEN is computed using the formula below:
//   VLEN  = sizeof(vector_register) / sizeof(CDT),
// where vector register size specified in section 3.2.1 Registers and the
// Stack Frame of original AMD64 ABI document.
QualType RetType = FD->getReturnType();
if (RetType.isNull())
21
←
Calling 'QualType::isNull'→
27
←
Returning from 'QualType::isNull'→
28
←
Taking true branch→
  return 0;
29
←
Returning zero→
ASTContext &C = FD->getASTContext();
QualType CDT;
if (!RetType.isNull() && !RetType->isVoidType()) {
  CDT = RetType;
} else {
  unsigned Offset = 0;
  if (const auto *MD = dyn_cast<CXXMethodDecl>(FD)) {
    if (ParamAttrs[Offset].Kind == Vector)
      CDT = C.getPointerType(C.getRecordType(MD->getParent()));
    ++Offset;
  }
  if (CDT.isNull()) {
    for (unsigned I = 0, E = FD->getNumParams(); I < E; ++I) {
      if (ParamAttrs[I + Offset].Kind == Vector) {
        CDT = FD->getParamDecl(I)->getType();
        break;
      }
    }
  }
}
if (CDT.isNull())
  CDT = C.IntTy;
CDT = CDT->getCanonicalTypeUnqualified();
if (CDT->isRecordType() || CDT->isUnionType())
  CDT = C.IntTy;
return C.getTypeSize(CDT);
11460}

11462static void
11463emitX86DeclareSimdFunction(const FunctionDecl *FD, llvm::Function *Fn,
                         const llvm::APSInt &VLENVal,
                         ArrayRef<ParamAttrTy> ParamAttrs,
                         OMPDeclareSimdDeclAttr::BranchStateTy State) {
struct ISADataTy {
  char ISA;
  unsigned VecRegSize;
};
ISADataTy ISAData[] = {
    {
        'b', 128
    }, // SSE
    {
        'c', 256
    }, // AVX
    {
        'd', 256
    }, // AVX2
    {
        'e', 512
    }, // AVX512
};
llvm::SmallVector<char, 2> Masked;
switch (State) {
12
←
Control jumps to 'case BS_Inbranch:'  at line 11494→
case OMPDeclareSimdDeclAttr::BS_Undefined:
  Masked.push_back('N');
  Masked.push_back('M');
  break;
case OMPDeclareSimdDeclAttr::BS_Notinbranch:
  Masked.push_back('N');
  break;
case OMPDeclareSimdDeclAttr::BS_Inbranch:
  Masked.push_back('M');
  break;
13
←
 Execution continues on line 11498→
}
for (char Mask : Masked) {
14
←
Assuming '__begin1' is not equal to '__end1'→
  for (const ISADataTy &Data : ISAData) {
    SmallString<256> Buffer;
    llvm::raw_svector_ostream Out(Buffer);
    Out << "_ZGV" << Data.ISA << Mask;
    if (!VLENVal) {
15
←
Calling 'APInt::operator!'→
18
←
Returning from 'APInt::operator!'→
19
←
Taking true branch→
      unsigned NumElts = evaluateCDTSize(FD, ParamAttrs);
20
←
Calling 'evaluateCDTSize'→
30
←
Returning from 'evaluateCDTSize'→
31
←
'NumElts' initialized to 0→
      assert(NumElts && "Non-zero simdlen/cdtsize expected")((void)0);
      Out << llvm::APSInt::getUnsigned(Data.VecRegSize / NumElts);
32
←
Division by zero
    } else {
      Out << VLENVal;
    }
    for (const ParamAttrTy &ParamAttr : ParamAttrs) {
      switch (ParamAttr.Kind){
      case LinearWithVarStride:
        Out << 's' << ParamAttr.StrideOrArg;
        break;
      case Linear:
        Out << 'l';
        if (ParamAttr.StrideOrArg != 1)
          Out << ParamAttr.StrideOrArg;
        break;
      case Uniform:
        Out << 'u';
        break;
      case Vector:
        Out << 'v';
        break;
      }
      if (!!ParamAttr.Alignment)
        Out << 'a' << ParamAttr.Alignment;
    }
    Out << '_' << Fn->getName();
    Fn->addFnAttr(Out.str());
  }
}
11534}

11536// This are the Functions that are needed to mangle the name of the
11537// vector functions generated by the compiler, according to the rules
11538// defined in the "Vector Function ABI specifications for AArch64",
11539// available at
11540// https://developer.arm.com/products/software-development-tools/hpc/arm-compiler-for-hpc/vector-function-abi.

11542/// Maps To Vector (MTV), as defined in 3.1.1 of the AAVFABI.
11543///
11544/// TODO: Need to implement the behavior for reference marked with a
11545/// var or no linear modifiers (1.b in the section). For this, we
11546/// need to extend ParamKindTy to support the linear modifiers.
11547static bool getAArch64MTV(QualType QT, ParamKindTy Kind) {
QT = QT.getCanonicalType();

if (QT->isVoidType())
  return false;

if (Kind == ParamKindTy::Uniform)
  return false;

if (Kind == ParamKindTy::Linear)
  return false;

// TODO: Handle linear references with modifiers

if (Kind == ParamKindTy::LinearWithVarStride)
  return false;

return true;
11565}

11567/// Pass By Value (PBV), as defined in 3.1.2 of the AAVFABI.
11568static bool getAArch64PBV(QualType QT, ASTContext &C) {
QT = QT.getCanonicalType();
unsigned Size = C.getTypeSize(QT);

// Only scalars and complex within 16 bytes wide set PVB to true.
if (Size != 8 && Size != 16 && Size != 32 && Size != 64 && Size != 128)
  return false;

if (QT->isFloatingType())
  return true;

if (QT->isIntegerType())
  return true;

if (QT->isPointerType())
  return true;

// TODO: Add support for complex types (section 3.1.2, item 2).

return false;
11588}

11590/// Computes the lane size (LS) of a return type or of an input parameter,
11591/// as defined by `LS(P)` in 3.2.1 of the AAVFABI.
11592/// TODO: Add support for references, section 3.2.1, item 1.
11593static unsigned getAArch64LS(QualType QT, ParamKindTy Kind, ASTContext &C) {
if (!getAArch64MTV(QT, Kind) && QT.getCanonicalType()->isPointerType()) {
  QualType PTy = QT.getCanonicalType()->getPointeeType();
  if (getAArch64PBV(PTy, C))
    return C.getTypeSize(PTy);
}
if (getAArch64PBV(QT, C))
  return C.getTypeSize(QT);

return C.getTypeSize(C.getUIntPtrType());
11603}

11605// Get Narrowest Data Size (NDS) and Widest Data Size (WDS) from the
11606// signature of the scalar function, as defined in 3.2.2 of the
11607// AAVFABI.
11608static std::tuple<unsigned, unsigned, bool>
11609getNDSWDS(const FunctionDecl *FD, ArrayRef<ParamAttrTy> ParamAttrs) {
QualType RetType = FD->getReturnType().getCanonicalType();

ASTContext &C = FD->getASTContext();

bool OutputBecomesInput = false;

llvm::SmallVector<unsigned, 8> Sizes;
if (!RetType->isVoidType()) {
  Sizes.push_back(getAArch64LS(RetType, ParamKindTy::Vector, C));
  if (!getAArch64PBV(RetType, C) && getAArch64MTV(RetType, {}))
    OutputBecomesInput = true;
}
for (unsigned I = 0, E = FD->getNumParams(); I < E; ++I) {
  QualType QT = FD->getParamDecl(I)->getType().getCanonicalType();
  Sizes.push_back(getAArch64LS(QT, ParamAttrs[I].Kind, C));
}

assert(!Sizes.empty() && "Unable to determine NDS and WDS.")((void)0);
// The LS of a function parameter / return value can only be a power
// of 2, starting from 8 bits, up to 128.
assert(std::all_of(Sizes.begin(), Sizes.end(),((void)0)
                   [](unsigned Size) {((void)0)
                     return Size == 8 || Size == 16 || Size == 32 ||((void)0)
                            Size == 64 || Size == 128;((void)0)
                   }) &&((void)0)
       "Invalid size")((void)0);

return std::make_tuple(*std::min_element(std::begin(Sizes), std::end(Sizes)),
                       *std::max_element(std::begin(Sizes), std::end(Sizes)),
                       OutputBecomesInput);
11640}

11642/// Mangle the parameter part of the vector function name according to
11643/// their OpenMP classification. The mangling function is defined in
11644/// section 3.5 of the AAVFABI.
11645static std::string mangleVectorParameters(ArrayRef<ParamAttrTy> ParamAttrs) {
SmallString<256> Buffer;
llvm::raw_svector_ostream Out(Buffer);
for (const auto &ParamAttr : ParamAttrs) {
  switch (ParamAttr.Kind) {
  case LinearWithVarStride:
    Out << "ls" << ParamAttr.StrideOrArg;
    break;
  case Linear:
    Out << 'l';
    // Don't print the step value if it is not present or if it is
    // equal to 1.
    if (ParamAttr.StrideOrArg != 1)
      Out << ParamAttr.StrideOrArg;
    break;
  case Uniform:
    Out << 'u';
    break;
  case Vector:
    Out << 'v';
    break;
  }

  if (!!ParamAttr.Alignment)
    Out << 'a' << ParamAttr.Alignment;
}

return std::string(Out.str());
11673}

11675// Function used to add the attribute. The parameter `VLEN` is
11676// templated to allow the use of "x" when targeting scalable functions
11677// for SVE.
11678template <typename T>
11679static void addAArch64VectorName(T VLEN, StringRef LMask, StringRef Prefix,
                               char ISA, StringRef ParSeq,
                               StringRef MangledName, bool OutputBecomesInput,
                               llvm::Function *Fn) {
SmallString<256> Buffer;
llvm::raw_svector_ostream Out(Buffer);
Out << Prefix << ISA << LMask << VLEN;
if (OutputBecomesInput)
  Out << "v";
Out << ParSeq << "_" << MangledName;
Fn->addFnAttr(Out.str());
11690}

11692// Helper function to generate the Advanced SIMD names depending on
11693// the value of the NDS when simdlen is not present.
11694static void addAArch64AdvSIMDNDSNames(unsigned NDS, StringRef Mask,
                                    StringRef Prefix, char ISA,
                                    StringRef ParSeq, StringRef MangledName,
                                    bool OutputBecomesInput,
                                    llvm::Function *Fn) {
switch (NDS) {
case 8:
  addAArch64VectorName(8, Mask, Prefix, ISA, ParSeq, MangledName,
                       OutputBecomesInput, Fn);
  addAArch64VectorName(16, Mask, Prefix, ISA, ParSeq, MangledName,
                       OutputBecomesInput, Fn);
  break;
case 16:
  addAArch64VectorName(4, Mask, Prefix, ISA, ParSeq, MangledName,
                       OutputBecomesInput, Fn);
  addAArch64VectorName(8, Mask, Prefix, ISA, ParSeq, MangledName,
                       OutputBecomesInput, Fn);
  break;
case 32:
  addAArch64VectorName(2, Mask, Prefix, ISA, ParSeq, MangledName,
                       OutputBecomesInput, Fn);
  addAArch64VectorName(4, Mask, Prefix, ISA, ParSeq, MangledName,
                       OutputBecomesInput, Fn);
  break;
case 64:
case 128:
  addAArch64VectorName(2, Mask, Prefix, ISA, ParSeq, MangledName,
                       OutputBecomesInput, Fn);
  break;
default:
  llvm_unreachable("Scalar type is too wide.")__builtin_unreachable();
}
11726}

11728/// Emit vector function attributes for AArch64, as defined in the AAVFABI.
11729static void emitAArch64DeclareSimdFunction(
  CodeGenModule &CGM, const FunctionDecl *FD, unsigned UserVLEN,
  ArrayRef<ParamAttrTy> ParamAttrs,
  OMPDeclareSimdDeclAttr::BranchStateTy State, StringRef MangledName,
  char ISA, unsigned VecRegSize, llvm::Function *Fn, SourceLocation SLoc) {

// Get basic data for building the vector signature.
const auto Data = getNDSWDS(FD, ParamAttrs);
const unsigned NDS = std::get<0>(Data);
const unsigned WDS = std::get<1>(Data);
const bool OutputBecomesInput = std::get<2>(Data);

// Check the values provided via `simdlen` by the user.
// 1. A `simdlen(1)` doesn't produce vector signatures,
if (UserVLEN == 1) {
  unsigned DiagID = CGM.getDiags().getCustomDiagID(
      DiagnosticsEngine::Warning,
      "The clause simdlen(1) has no effect when targeting aarch64.");
  CGM.getDiags().Report(SLoc, DiagID);
  return;
}

// 2. Section 3.3.1, item 1: user input must be a power of 2 for
// Advanced SIMD output.
if (ISA == 'n' && UserVLEN && !llvm::isPowerOf2_32(UserVLEN)) {
  unsigned DiagID = CGM.getDiags().getCustomDiagID(
      DiagnosticsEngine::Warning, "The value specified in simdlen must be a "
                                  "power of 2 when targeting Advanced SIMD.");
  CGM.getDiags().Report(SLoc, DiagID);
  return;
}

// 3. Section 3.4.1. SVE fixed lengh must obey the architectural
// limits.
if (ISA == 's' && UserVLEN != 0) {
  if ((UserVLEN * WDS > 2048) || (UserVLEN * WDS % 128 != 0)) {
    unsigned DiagID = CGM.getDiags().getCustomDiagID(
        DiagnosticsEngine::Warning, "The clause simdlen must fit the %0-bit "
                                    "lanes in the architectural constraints "
                                    "for SVE (min is 128-bit, max is "
                                    "2048-bit, by steps of 128-bit)");
    CGM.getDiags().Report(SLoc, DiagID) << WDS;
    return;
  }
}

// Sort out parameter sequence.
const std::string ParSeq = mangleVectorParameters(ParamAttrs);
StringRef Prefix = "_ZGV";
// Generate simdlen from user input (if any).
if (UserVLEN) {
  if (ISA == 's') {
    // SVE generates only a masked function.
    addAArch64VectorName(UserVLEN, "M", Prefix, ISA, ParSeq, MangledName,
                         OutputBecomesInput, Fn);
  } else {
    assert(ISA == 'n' && "Expected ISA either 's' or 'n'.")((void)0);
    // Advanced SIMD generates one or two functions, depending on
    // the `[not]inbranch` clause.
    switch (State) {
    case OMPDeclareSimdDeclAttr::BS_Undefined:
      addAArch64VectorName(UserVLEN, "N", Prefix, ISA, ParSeq, MangledName,
                           OutputBecomesInput, Fn);
      addAArch64VectorName(UserVLEN, "M", Prefix, ISA, ParSeq, MangledName,
                           OutputBecomesInput, Fn);
      break;
    case OMPDeclareSimdDeclAttr::BS_Notinbranch:
      addAArch64VectorName(UserVLEN, "N", Prefix, ISA, ParSeq, MangledName,
                           OutputBecomesInput, Fn);
      break;
    case OMPDeclareSimdDeclAttr::BS_Inbranch:
      addAArch64VectorName(UserVLEN, "M", Prefix, ISA, ParSeq, MangledName,
                           OutputBecomesInput, Fn);
      break;
    }
  }
} else {
  // If no user simdlen is provided, follow the AAVFABI rules for
  // generating the vector length.
  if (ISA == 's') {
    // SVE, section 3.4.1, item 1.
    addAArch64VectorName("x", "M", Prefix, ISA, ParSeq, MangledName,
                         OutputBecomesInput, Fn);
  } else {
    assert(ISA == 'n' && "Expected ISA either 's' or 'n'.")((void)0);
    // Advanced SIMD, Section 3.3.1 of the AAVFABI, generates one or
    // two vector names depending on the use of the clause
    // `[not]inbranch`.
    switch (State) {
    case OMPDeclareSimdDeclAttr::BS_Undefined:
      addAArch64AdvSIMDNDSNames(NDS, "N", Prefix, ISA, ParSeq, MangledName,
                                OutputBecomesInput, Fn);
      addAArch64AdvSIMDNDSNames(NDS, "M", Prefix, ISA, ParSeq, MangledName,
                                OutputBecomesInput, Fn);
      break;
    case OMPDeclareSimdDeclAttr::BS_Notinbranch:
      addAArch64AdvSIMDNDSNames(NDS, "N", Prefix, ISA, ParSeq, MangledName,
                                OutputBecomesInput, Fn);
      break;
    case OMPDeclareSimdDeclAttr::BS_Inbranch:
      addAArch64AdvSIMDNDSNames(NDS, "M", Prefix, ISA, ParSeq, MangledName,
                                OutputBecomesInput, Fn);
      break;
    }
  }
}
11835}

11837void CGOpenMPRuntime::emitDeclareSimdFunction(const FunctionDecl *FD,
                                            llvm::Function *Fn) {
ASTContext &C = CGM.getContext();
FD = FD->getMostRecentDecl();
// Map params to their positions in function decl.
llvm::DenseMap<const Decl *, unsigned> ParamPositions;
if (isa<CXXMethodDecl>(FD))
1
Assuming 'FD' is not a 'CXXMethodDecl'→
2
←
Taking false branch→
  ParamPositions.try_emplace(FD, 0);
unsigned ParamPos = ParamPositions.size();
for (const ParmVarDecl *P : FD->parameters()) {
3
←
Assuming '__begin1' is equal to '__end1'→
  ParamPositions.try_emplace(P->getCanonicalDecl(), ParamPos);
  ++ParamPos;
}
while (FD) {
4
←
Loop condition is true.  Entering loop body→
  for (const auto *Attr : FD->specific_attrs<OMPDeclareSimdDeclAttr>()) {
    llvm::SmallVector<ParamAttrTy, 8> ParamAttrs(ParamPositions.size());
    // Mark uniform parameters.
    for (const Expr *E : Attr->uniforms()) {
5
←
Assuming '__begin3' is equal to '__end3'→
      E = E->IgnoreParenImpCasts();
      unsigned Pos;
      if (isa<CXXThisExpr>(E)) {
        Pos = ParamPositions[FD];
      } else {
        const auto *PVD = cast<ParmVarDecl>(cast<DeclRefExpr>(E)->getDecl())
                              ->getCanonicalDecl();
        Pos = ParamPositions[PVD];
      }
      ParamAttrs[Pos].Kind = Uniform;
    }
    // Get alignment info.
    auto NI = Attr->alignments_begin();
    for (const Expr *E : Attr->aligneds()) {
6
←
Assuming '__begin3' is equal to '__end3'→
      E = E->IgnoreParenImpCasts();
      unsigned Pos;
      QualType ParmTy;
      if (isa<CXXThisExpr>(E)) {
        Pos = ParamPositions[FD];
        ParmTy = E->getType();
      } else {
        const auto *PVD = cast<ParmVarDecl>(cast<DeclRefExpr>(E)->getDecl())
                              ->getCanonicalDecl();
        Pos = ParamPositions[PVD];
        ParmTy = PVD->getType();
      }
      ParamAttrs[Pos].Alignment =
          (*NI)
              ? (*NI)->EvaluateKnownConstInt(C)
              : llvm::APSInt::getUnsigned(
                    C.toCharUnitsFromBits(C.getOpenMPDefaultSimdAlign(ParmTy))
                        .getQuantity());
      ++NI;
    }
    // Mark linear parameters.
    auto SI = Attr->steps_begin();
    auto MI = Attr->modifiers_begin();
    for (const Expr *E : Attr->linears()) {
7
←
Assuming '__begin3' is equal to '__end3'→
      E = E->IgnoreParenImpCasts();
      unsigned Pos;
      // Rescaling factor needed to compute the linear parameter
      // value in the mangled name.
      unsigned PtrRescalingFactor = 1;
      if (isa<CXXThisExpr>(E)) {
        Pos = ParamPositions[FD];
      } else {
        const auto *PVD = cast<ParmVarDecl>(cast<DeclRefExpr>(E)->getDecl())
                              ->getCanonicalDecl();
        Pos = ParamPositions[PVD];
        if (auto *P = dyn_cast<PointerType>(PVD->getType()))
          PtrRescalingFactor = CGM.getContext()
                                   .getTypeSizeInChars(P->getPointeeType())
                                   .getQuantity();
      }
      ParamAttrTy &ParamAttr = ParamAttrs[Pos];
      ParamAttr.Kind = Linear;
      // Assuming a stride of 1, for `linear` without modifiers.
      ParamAttr.StrideOrArg = llvm::APSInt::getUnsigned(1);
      if (*SI) {
        Expr::EvalResult Result;
        if (!(*SI)->EvaluateAsInt(Result, C, Expr::SE_AllowSideEffects)) {
          if (const auto *DRE =
                  cast<DeclRefExpr>((*SI)->IgnoreParenImpCasts())) {
            if (const auto *StridePVD = cast<ParmVarDecl>(DRE->getDecl())) {
              ParamAttr.Kind = LinearWithVarStride;
              ParamAttr.StrideOrArg = llvm::APSInt::getUnsigned(
                  ParamPositions[StridePVD->getCanonicalDecl()]);
            }
          }
        } else {
          ParamAttr.StrideOrArg = Result.Val.getInt();
        }
      }
      // If we are using a linear clause on a pointer, we need to
      // rescale the value of linear_step with the byte size of the
      // pointee type.
      if (Linear == ParamAttr.Kind)
        ParamAttr.StrideOrArg = ParamAttr.StrideOrArg * PtrRescalingFactor;
      ++SI;
      ++MI;
    }
    llvm::APSInt VLENVal;
    SourceLocation ExprLoc;
    const Expr *VLENExpr = Attr->getSimdlen();
    if (VLENExpr) {
8
←
Assuming 'VLENExpr' is null→
9
←
Taking false branch→
      VLENVal = VLENExpr->EvaluateKnownConstInt(C);
      ExprLoc = VLENExpr->getExprLoc();
    }
    OMPDeclareSimdDeclAttr::BranchStateTy State = Attr->getBranchState();
    if (CGM.getTriple().isX86()) {
10
←
Taking true branch→
      emitX86DeclareSimdFunction(FD, Fn, VLENVal, ParamAttrs, State);
11
←
Calling 'emitX86DeclareSimdFunction'→
    } else if (CGM.getTriple().getArch() == llvm::Triple::aarch64) {
      unsigned VLEN = VLENVal.getExtValue();
      StringRef MangledName = Fn->getName();
      if (CGM.getTarget().hasFeature("sve"))
        emitAArch64DeclareSimdFunction(CGM, FD, VLEN, ParamAttrs, State,
                                       MangledName, 's', 128, Fn, ExprLoc);
      if (CGM.getTarget().hasFeature("neon"))
        emitAArch64DeclareSimdFunction(CGM, FD, VLEN, ParamAttrs, State,
                                       MangledName, 'n', 128, Fn, ExprLoc);
    }
  }
  FD = FD->getPreviousDecl();
}
11959}

11961namespace {
11962/// Cleanup action for doacross support.
11963class DoacrossCleanupTy final : public EHScopeStack::Cleanup {
11964public:
static const int DoacrossFinArgs = 2;

11967private:
llvm::FunctionCallee RTLFn;
llvm::Value *Args[DoacrossFinArgs];

11971public:
DoacrossCleanupTy(llvm::FunctionCallee RTLFn,
                  ArrayRef<llvm::Value *> CallArgs)
    : RTLFn(RTLFn) {
  assert(CallArgs.size() == DoacrossFinArgs)((void)0);
  std::copy(CallArgs.begin(), CallArgs.end(), std::begin(Args));
}
void Emit(CodeGenFunction &CGF, Flags /*flags*/) override {
  if (!CGF.HaveInsertPoint())
    return;
  CGF.EmitRuntimeCall(RTLFn, Args);
}
11983};
11984} // namespace

11986void CGOpenMPRuntime::emitDoacrossInit(CodeGenFunction &CGF,
                                     const OMPLoopDirective &D,
                                     ArrayRef<Expr *> NumIterations) {
if (!CGF.HaveInsertPoint())
  return;

ASTContext &C = CGM.getContext();
QualType Int64Ty = C.getIntTypeForBitwidth(/*DestWidth=*/64, /*Signed=*/true);
RecordDecl *RD;
if (KmpDimTy.isNull()) {
  // Build struct kmp_dim {  // loop bounds info casted to kmp_int64
  //  kmp_int64 lo; // lower
  //  kmp_int64 up; // upper
  //  kmp_int64 st; // stride
  // };
  RD = C.buildImplicitRecord("kmp_dim");
  RD->startDefinition();
  addFieldToRecordDecl(C, RD, Int64Ty);
  addFieldToRecordDecl(C, RD, Int64Ty);
  addFieldToRecordDecl(C, RD, Int64Ty);
  RD->completeDefinition();
  KmpDimTy = C.getRecordType(RD);
} else {
  RD = cast<RecordDecl>(KmpDimTy->getAsTagDecl());
}
llvm::APInt Size(/*numBits=*/32, NumIterations.size());
QualType ArrayTy =
    C.getConstantArrayType(KmpDimTy, Size, nullptr, ArrayType::Normal, 0);

Address DimsAddr = CGF.CreateMemTemp(ArrayTy, "dims");
CGF.EmitNullInitialization(DimsAddr, ArrayTy);
enum { LowerFD = 0, UpperFD, StrideFD };
// Fill dims with data.
for (unsigned I = 0, E = NumIterations.size(); I < E; ++I) {
  LValue DimsLVal = CGF.MakeAddrLValue(
      CGF.Builder.CreateConstArrayGEP(DimsAddr, I), KmpDimTy);
  // dims.upper = num_iterations;
  LValue UpperLVal = CGF.EmitLValueForField(
      DimsLVal, *std::next(RD->field_begin(), UpperFD));
  llvm::Value *NumIterVal = CGF.EmitScalarConversion(
      CGF.EmitScalarExpr(NumIterations[I]), NumIterations[I]->getType(),
      Int64Ty, NumIterations[I]->getExprLoc());
  CGF.EmitStoreOfScalar(NumIterVal, UpperLVal);
  // dims.stride = 1;
  LValue StrideLVal = CGF.EmitLValueForField(
      DimsLVal, *std::next(RD->field_begin(), StrideFD));
  CGF.EmitStoreOfScalar(llvm::ConstantInt::getSigned(CGM.Int64Ty, /*V=*/1),
                        StrideLVal);
}

// Build call void __kmpc_doacross_init(ident_t *loc, kmp_int32 gtid,
// kmp_int32 num_dims, struct kmp_dim * dims);
llvm::Value *Args[] = {
    emitUpdateLocation(CGF, D.getBeginLoc()),
    getThreadID(CGF, D.getBeginLoc()),
    llvm::ConstantInt::getSigned(CGM.Int32Ty, NumIterations.size()),
    CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
        CGF.Builder.CreateConstArrayGEP(DimsAddr, 0).getPointer(),
        CGM.VoidPtrTy)};

llvm::FunctionCallee RTLFn = OMPBuilder.getOrCreateRuntimeFunction(
    CGM.getModule(), OMPRTL___kmpc_doacross_init);
CGF.EmitRuntimeCall(RTLFn, Args);
llvm::Value *FiniArgs[DoacrossCleanupTy::DoacrossFinArgs] = {
    emitUpdateLocation(CGF, D.getEndLoc()), getThreadID(CGF, D.getEndLoc())};
llvm::FunctionCallee FiniRTLFn = OMPBuilder.getOrCreateRuntimeFunction(
    CGM.getModule(), OMPRTL___kmpc_doacross_fini);
CGF.EHStack.pushCleanup<DoacrossCleanupTy>(NormalAndEHCleanup, FiniRTLFn,
                                           llvm::makeArrayRef(FiniArgs));
12055}

12057void CGOpenMPRuntime::emitDoacrossOrdered(CodeGenFunction &CGF,
                                        const OMPDependClause *C) {
QualType Int64Ty =
    CGM.getContext().getIntTypeForBitwidth(/*DestWidth=*/64, /*Signed=*/1);
llvm::APInt Size(/*numBits=*/32, C->getNumLoops());
QualType ArrayTy = CGM.getContext().getConstantArrayType(
    Int64Ty, Size, nullptr, ArrayType::Normal, 0);
Address CntAddr = CGF.CreateMemTemp(ArrayTy, ".cnt.addr");
for (unsigned I = 0, E = C->getNumLoops(); I < E; ++I) {
  const Expr *CounterVal = C->getLoopData(I);
  assert(CounterVal)((void)0);
  llvm::Value *CntVal = CGF.EmitScalarConversion(
      CGF.EmitScalarExpr(CounterVal), CounterVal->getType(), Int64Ty,
      CounterVal->getExprLoc());
  CGF.EmitStoreOfScalar(CntVal, CGF.Builder.CreateConstArrayGEP(CntAddr, I),
                        /*Volatile=*/false, Int64Ty);
}
llvm::Value *Args[] = {
    emitUpdateLocation(CGF, C->getBeginLoc()),
    getThreadID(CGF, C->getBeginLoc()),
    CGF.Builder.CreateConstArrayGEP(CntAddr, 0).getPointer()};
llvm::FunctionCallee RTLFn;
if (C->getDependencyKind() == OMPC_DEPEND_source) {
  RTLFn = OMPBuilder.getOrCreateRuntimeFunction(CGM.getModule(),
                                                OMPRTL___kmpc_doacross_post);
} else {
  assert(C->getDependencyKind() == OMPC_DEPEND_sink)((void)0);
  RTLFn = OMPBuilder.getOrCreateRuntimeFunction(CGM.getModule(),
                                                OMPRTL___kmpc_doacross_wait);
}
CGF.EmitRuntimeCall(RTLFn, Args);
12088}

12090void CGOpenMPRuntime::emitCall(CodeGenFunction &CGF, SourceLocation Loc,
                             llvm::FunctionCallee Callee,
                             ArrayRef<llvm::Value *> Args) const {
assert(Loc.isValid() && "Outlined function call location must be valid.")((void)0);
auto DL = ApplyDebugLocation::CreateDefaultArtificial(CGF, Loc);

if (auto *Fn = dyn_cast<llvm::Function>(Callee.getCallee())) {
  if (Fn->doesNotThrow()) {
    CGF.EmitNounwindRuntimeCall(Fn, Args);
    return;
  }
}
CGF.EmitRuntimeCall(Callee, Args);
12103}

12105void CGOpenMPRuntime::emitOutlinedFunctionCall(
  CodeGenFunction &CGF, SourceLocation Loc, llvm::FunctionCallee OutlinedFn,
  ArrayRef<llvm::Value *> Args) const {
emitCall(CGF, Loc, OutlinedFn, Args);
12109}

12111void CGOpenMPRuntime::emitFunctionProlog(CodeGenFunction &CGF, const Decl *D) {
if (const auto *FD = dyn_cast<FunctionDecl>(D))
  if (OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(FD))
    HasEmittedDeclareTargetRegion = true;
12115}

12117Address CGOpenMPRuntime::getParameterAddress(CodeGenFunction &CGF,
                                           const VarDecl *NativeParam,
                                           const VarDecl *TargetParam) const {
return CGF.GetAddrOfLocalVar(NativeParam);
12121}

12123Address CGOpenMPRuntime::getAddressOfLocalVariable(CodeGenFunction &CGF,
                                                 const VarDecl *VD) {
if (!VD)
  return Address::invalid();
Address UntiedAddr = Address::invalid();
Address UntiedRealAddr = Address::invalid();
auto It = FunctionToUntiedTaskStackMap.find(CGF.CurFn);
if (It != FunctionToUntiedTaskStackMap.end()) {
  const UntiedLocalVarsAddressesMap &UntiedData =
      UntiedLocalVarsStack[It->second];
  auto I = UntiedData.find(VD);
  if (I != UntiedData.end()) {
    UntiedAddr = I->second.first;
    UntiedRealAddr = I->second.second;
  }
}
const VarDecl *CVD = VD->getCanonicalDecl();
if (CVD->hasAttr<OMPAllocateDeclAttr>()) {
  // Use the default allocation.
  if (!isAllocatableDecl(VD))
    return UntiedAddr;
  llvm::Value *Size;
  CharUnits Align = CGM.getContext().getDeclAlign(CVD);
  if (CVD->getType()->isVariablyModifiedType()) {
    Size = CGF.getTypeSize(CVD->getType());
    // Align the size: ((size + align - 1) / align) * align
    Size = CGF.Builder.CreateNUWAdd(
        Size, CGM.getSize(Align - CharUnits::fromQuantity(1)));
    Size = CGF.Builder.CreateUDiv(Size, CGM.getSize(Align));
    Size = CGF.Builder.CreateNUWMul(Size, CGM.getSize(Align));
  } else {
    CharUnits Sz = CGM.getContext().getTypeSizeInChars(CVD->getType());
    Size = CGM.getSize(Sz.alignTo(Align));
  }
  llvm::Value *ThreadID = getThreadID(CGF, CVD->getBeginLoc());
  const auto *AA = CVD->getAttr<OMPAllocateDeclAttr>();
  assert(AA->getAllocator() &&((void)0)
         "Expected allocator expression for non-default allocator.")((void)0);
  llvm::Value *Allocator = CGF.EmitScalarExpr(AA->getAllocator());
  // According to the standard, the original allocator type is a enum
  // (integer). Convert to pointer type, if required.
  Allocator = CGF.EmitScalarConversion(
      Allocator, AA->getAllocator()->getType(), CGF.getContext().VoidPtrTy,
      AA->getAllocator()->getExprLoc());
  llvm::Value *Args[] = {ThreadID, Size, Allocator};

  llvm::Value *Addr =
      CGF.EmitRuntimeCall(OMPBuilder.getOrCreateRuntimeFunction(
                              CGM.getModule(), OMPRTL___kmpc_alloc),
                          Args, getName({CVD->getName(), ".void.addr"}));
  llvm::FunctionCallee FiniRTLFn = OMPBuilder.getOrCreateRuntimeFunction(
      CGM.getModule(), OMPRTL___kmpc_free);
  QualType Ty = CGM.getContext().getPointerType(CVD->getType());
  Addr = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
      Addr, CGF.ConvertTypeForMem(Ty), getName({CVD->getName(), ".addr"}));
  if (UntiedAddr.isValid())
    CGF.EmitStoreOfScalar(Addr, UntiedAddr, /*Volatile=*/false, Ty);

  // Cleanup action for allocate support.
  class OMPAllocateCleanupTy final : public EHScopeStack::Cleanup {
    llvm::FunctionCallee RTLFn;
    SourceLocation::UIntTy LocEncoding;
    Address Addr;
    const Expr *Allocator;

  public:
    OMPAllocateCleanupTy(llvm::FunctionCallee RTLFn,
                         SourceLocation::UIntTy LocEncoding, Address Addr,
                         const Expr *Allocator)
        : RTLFn(RTLFn), LocEncoding(LocEncoding), Addr(Addr),
          Allocator(Allocator) {}
    void Emit(CodeGenFunction &CGF, Flags /*flags*/) override {
      if (!CGF.HaveInsertPoint())
        return;
      llvm::Value *Args[3];
      Args[0] = CGF.CGM.getOpenMPRuntime().getThreadID(
          CGF, SourceLocation::getFromRawEncoding(LocEncoding));
      Args[1] = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
          Addr.getPointer(), CGF.VoidPtrTy);
      llvm::Value *AllocVal = CGF.EmitScalarExpr(Allocator);
      // According to the standard, the original allocator type is a enum
      // (integer). Convert to pointer type, if required.
      AllocVal = CGF.EmitScalarConversion(AllocVal, Allocator->getType(),
                                          CGF.getContext().VoidPtrTy,
                                          Allocator->getExprLoc());
      Args[2] = AllocVal;

      CGF.EmitRuntimeCall(RTLFn, Args);
    }
  };
  Address VDAddr =
      UntiedRealAddr.isValid() ? UntiedRealAddr : Address(Addr, Align);
  CGF.EHStack.pushCleanup<OMPAllocateCleanupTy>(
      NormalAndEHCleanup, FiniRTLFn, CVD->getLocation().getRawEncoding(),
      VDAddr, AA->getAllocator());
  if (UntiedRealAddr.isValid())
    if (auto *Region =
            dyn_cast_or_null<CGOpenMPRegionInfo>(CGF.CapturedStmtInfo))
      Region->emitUntiedSwitch(CGF);
  return VDAddr;
}
return UntiedAddr;
12225}

12227bool CGOpenMPRuntime::isLocalVarInUntiedTask(CodeGenFunction &CGF,
                                           const VarDecl *VD) const {
auto It = FunctionToUntiedTaskStackMap.find(CGF.CurFn);
if (It == FunctionToUntiedTaskStackMap.end())
  return false;
return UntiedLocalVarsStack[It->second].count(VD) > 0;
12233}

12235CGOpenMPRuntime::NontemporalDeclsRAII::NontemporalDeclsRAII(
  CodeGenModule &CGM, const OMPLoopDirective &S)
  : CGM(CGM), NeedToPush(S.hasClausesOfKind<OMPNontemporalClause>()) {
assert(CGM.getLangOpts().OpenMP && "Not in OpenMP mode.")((void)0);
if (!NeedToPush)
  return;
NontemporalDeclsSet &DS =
    CGM.getOpenMPRuntime().NontemporalDeclsStack.emplace_back();
for (const auto *C : S.getClausesOfKind<OMPNontemporalClause>()) {
  for (const Stmt *Ref : C->private_refs()) {
    const auto *SimpleRefExpr = cast<Expr>(Ref)->IgnoreParenImpCasts();
    const ValueDecl *VD;
    if (const auto *DRE = dyn_cast<DeclRefExpr>(SimpleRefExpr)) {
      VD = DRE->getDecl();
    } else {
      const auto *ME = cast<MemberExpr>(SimpleRefExpr);
      assert((ME->isImplicitCXXThis() ||((void)0)
              isa<CXXThisExpr>(ME->getBase()->IgnoreParenImpCasts())) &&((void)0)
             "Expected member of current class.")((void)0);
      VD = ME->getMemberDecl();
    }
    DS.insert(VD);
  }
}
12259}

12261CGOpenMPRuntime::NontemporalDeclsRAII::~NontemporalDeclsRAII() {
if (!NeedToPush)
  return;
CGM.getOpenMPRuntime().NontemporalDeclsStack.pop_back();
12265}

12267CGOpenMPRuntime::UntiedTaskLocalDeclsRAII::UntiedTaskLocalDeclsRAII(
  CodeGenFunction &CGF,
  const llvm::MapVector<CanonicalDeclPtr<const VarDecl>,
                        std::pair<Address, Address>> &LocalVars)
  : CGM(CGF.CGM), NeedToPush(!LocalVars.empty()) {
if (!NeedToPush)
  return;
CGM.getOpenMPRuntime().FunctionToUntiedTaskStackMap.try_emplace(
    CGF.CurFn, CGM.getOpenMPRuntime().UntiedLocalVarsStack.size());
CGM.getOpenMPRuntime().UntiedLocalVarsStack.push_back(LocalVars);
12277}

12279CGOpenMPRuntime::UntiedTaskLocalDeclsRAII::~UntiedTaskLocalDeclsRAII() {
if (!NeedToPush)
  return;
CGM.getOpenMPRuntime().UntiedLocalVarsStack.pop_back();
12283}

12285bool CGOpenMPRuntime::isNontemporalDecl(const ValueDecl *VD) const {
assert(CGM.getLangOpts().OpenMP && "Not in OpenMP mode.")((void)0);

return llvm::any_of(
    CGM.getOpenMPRuntime().NontemporalDeclsStack,
    [VD](const NontemporalDeclsSet &Set) { return Set.count(VD) > 0; });
12291}

12293void CGOpenMPRuntime::LastprivateConditionalRAII::tryToDisableInnerAnalysis(
  const OMPExecutableDirective &S,
  llvm::DenseSet<CanonicalDeclPtr<const Decl>> &NeedToAddForLPCsAsDisabled)
  const {
llvm::DenseSet<CanonicalDeclPtr<const Decl>> NeedToCheckForLPCs;
// Vars in target/task regions must be excluded completely.
if (isOpenMPTargetExecutionDirective(S.getDirectiveKind()) ||
    isOpenMPTaskingDirective(S.getDirectiveKind())) {
  SmallVector<OpenMPDirectiveKind, 4> CaptureRegions;
  getOpenMPCaptureRegions(CaptureRegions, S.getDirectiveKind());
  const CapturedStmt *CS = S.getCapturedStmt(CaptureRegions.front());
  for (const CapturedStmt::Capture &Cap : CS->captures()) {
    if (Cap.capturesVariable() || Cap.capturesVariableByCopy())
      NeedToCheckForLPCs.insert(Cap.getCapturedVar());
  }
}
// Exclude vars in private clauses.
for (const auto *C : S.getClausesOfKind<OMPPrivateClause>()) {
  for (const Expr *Ref : C->varlists()) {
    if (!Ref->getType()->isScalarType())
      continue;
    const auto *DRE = dyn_cast<DeclRefExpr>(Ref->IgnoreParenImpCasts());
    if (!DRE)
      continue;
    NeedToCheckForLPCs.insert(DRE->getDecl());
  }
}
for (const auto *C : S.getClausesOfKind<OMPFirstprivateClause>()) {
  for (const Expr *Ref : C->varlists()) {
    if (!Ref->getType()->isScalarType())
      continue;
    const auto *DRE = dyn_cast<DeclRefExpr>(Ref->IgnoreParenImpCasts());
    if (!DRE)
      continue;
    NeedToCheckForLPCs.insert(DRE->getDecl());
  }
}
for (const auto *C : S.getClausesOfKind<OMPLastprivateClause>()) {
  for (const Expr *Ref : C->varlists()) {
    if (!Ref->getType()->isScalarType())
      continue;
    const auto *DRE = dyn_cast<DeclRefExpr>(Ref->IgnoreParenImpCasts());
    if (!DRE)
      continue;
    NeedToCheckForLPCs.insert(DRE->getDecl());
  }
}
for (const auto *C : S.getClausesOfKind<OMPReductionClause>()) {
  for (const Expr *Ref : C->varlists()) {
    if (!Ref->getType()->isScalarType())
      continue;
    const auto *DRE = dyn_cast<DeclRefExpr>(Ref->IgnoreParenImpCasts());
    if (!DRE)
      continue;
    NeedToCheckForLPCs.insert(DRE->getDecl());
  }
}
for (const auto *C : S.getClausesOfKind<OMPLinearClause>()) {
  for (const Expr *Ref : C->varlists()) {
    if (!Ref->getType()->isScalarType())
      continue;
    const auto *DRE = dyn_cast<DeclRefExpr>(Ref->IgnoreParenImpCasts());
    if (!DRE)
      continue;
    NeedToCheckForLPCs.insert(DRE->getDecl());
  }
}
for (const Decl *VD : NeedToCheckForLPCs) {
  for (const LastprivateConditionalData &Data :
       llvm::reverse(CGM.getOpenMPRuntime().LastprivateConditionalStack)) {
    if (Data.DeclToUniqueName.count(VD) > 0) {
      if (!Data.Disabled)
        NeedToAddForLPCsAsDisabled.insert(VD);
      break;
    }
  }
}
12370}

12372CGOpenMPRuntime::LastprivateConditionalRAII::LastprivateConditionalRAII(
  CodeGenFunction &CGF, const OMPExecutableDirective &S, LValue IVLVal)
  : CGM(CGF.CGM),
    Action((CGM.getLangOpts().OpenMP >= 50 &&
            llvm::any_of(S.getClausesOfKind<OMPLastprivateClause>(),
                         [](const OMPLastprivateClause *C) {
                           return C->getKind() ==
                                  OMPC_LASTPRIVATE_conditional;
                         }))
               ? ActionToDo::PushAsLastprivateConditional
               : ActionToDo::DoNotPush) {
assert(CGM.getLangOpts().OpenMP && "Not in OpenMP mode.")((void)0);
if (CGM.getLangOpts().OpenMP < 50 || Action == ActionToDo::DoNotPush)
  return;
assert(Action == ActionToDo::PushAsLastprivateConditional &&((void)0)
       "Expected a push action.")((void)0);
LastprivateConditionalData &Data =
    CGM.getOpenMPRuntime().LastprivateConditionalStack.emplace_back();
for (const auto *C : S.getClausesOfKind<OMPLastprivateClause>()) {
  if (C->getKind() != OMPC_LASTPRIVATE_conditional)
    continue;

  for (const Expr *Ref : C->varlists()) {
    Data.DeclToUniqueName.insert(std::make_pair(
        cast<DeclRefExpr>(Ref->IgnoreParenImpCasts())->getDecl(),
        SmallString<16>(generateUniqueName(CGM, "pl_cond", Ref))));
  }
}
Data.IVLVal = IVLVal;
Data.Fn = CGF.CurFn;
12402}

12404CGOpenMPRuntime::LastprivateConditionalRAII::LastprivateConditionalRAII(
  CodeGenFunction &CGF, const OMPExecutableDirective &S)
  : CGM(CGF.CGM), Action(ActionToDo::DoNotPush) {
assert(CGM.getLangOpts().OpenMP && "Not in OpenMP mode.")((void)0);
if (CGM.getLangOpts().OpenMP < 50)
  return;
llvm::DenseSet<CanonicalDeclPtr<const Decl>> NeedToAddForLPCsAsDisabled;
tryToDisableInnerAnalysis(S, NeedToAddForLPCsAsDisabled);
if (!NeedToAddForLPCsAsDisabled.empty()) {
  Action = ActionToDo::DisableLastprivateConditional;
  LastprivateConditionalData &Data =
      CGM.getOpenMPRuntime().LastprivateConditionalStack.emplace_back();
  for (const Decl *VD : NeedToAddForLPCsAsDisabled)
    Data.DeclToUniqueName.insert(std::make_pair(VD, SmallString<16>()));
  Data.Fn = CGF.CurFn;
  Data.Disabled = true;
}
12421}

12423CGOpenMPRuntime::LastprivateConditionalRAII
12424CGOpenMPRuntime::LastprivateConditionalRAII::disable(
  CodeGenFunction &CGF, const OMPExecutableDirective &S) {
return LastprivateConditionalRAII(CGF, S);
12427}

12429CGOpenMPRuntime::LastprivateConditionalRAII::~LastprivateConditionalRAII() {
if (CGM.getLangOpts().OpenMP < 50)
  return;
if (Action == ActionToDo::DisableLastprivateConditional) {
  assert(CGM.getOpenMPRuntime().LastprivateConditionalStack.back().Disabled &&((void)0)
         "Expected list of disabled private vars.")((void)0);
  CGM.getOpenMPRuntime().LastprivateConditionalStack.pop_back();
}
if (Action == ActionToDo::PushAsLastprivateConditional) {
  assert(((void)0)
      !CGM.getOpenMPRuntime().LastprivateConditionalStack.back().Disabled &&((void)0)
      "Expected list of lastprivate conditional vars.")((void)0);
  CGM.getOpenMPRuntime().LastprivateConditionalStack.pop_back();
}
12443}

12445Address CGOpenMPRuntime::emitLastprivateConditionalInit(CodeGenFunction &CGF,
                                                      const VarDecl *VD) {
ASTContext &C = CGM.getContext();
auto I = LastprivateConditionalToTypes.find(CGF.CurFn);
if (I == LastprivateConditionalToTypes.end())
  I = LastprivateConditionalToTypes.try_emplace(CGF.CurFn).first;
QualType NewType;
const FieldDecl *VDField;
const FieldDecl *FiredField;
LValue BaseLVal;
auto VI = I->getSecond().find(VD);
if (VI == I->getSecond().end()) {
  RecordDecl *RD = C.buildImplicitRecord("lasprivate.conditional");
  RD->startDefinition();
  VDField = addFieldToRecordDecl(C, RD, VD->getType().getNonReferenceType());
  FiredField = addFieldToRecordDecl(C, RD, C.CharTy);
  RD->completeDefinition();
  NewType = C.getRecordType(RD);
  Address Addr = CGF.CreateMemTemp(NewType, C.getDeclAlign(VD), VD->getName());
  BaseLVal = CGF.MakeAddrLValue(Addr, NewType, AlignmentSource::Decl);
  I->getSecond().try_emplace(VD, NewType, VDField, FiredField, BaseLVal);
} else {
  NewType = std::get<0>(VI->getSecond());
  VDField = std::get<1>(VI->getSecond());
  FiredField = std::get<2>(VI->getSecond());
  BaseLVal = std::get<3>(VI->getSecond());
}
LValue FiredLVal =
    CGF.EmitLValueForField(BaseLVal, FiredField);
CGF.EmitStoreOfScalar(
    llvm::ConstantInt::getNullValue(CGF.ConvertTypeForMem(C.CharTy)),
    FiredLVal);
return CGF.EmitLValueForField(BaseLVal, VDField).getAddress(CGF);
12478}

12480namespace {
12481/// Checks if the lastprivate conditional variable is referenced in LHS.
12482class LastprivateConditionalRefChecker final
  : public ConstStmtVisitor<LastprivateConditionalRefChecker, bool> {
ArrayRef<CGOpenMPRuntime::LastprivateConditionalData> LPM;
const Expr *FoundE = nullptr;
const Decl *FoundD = nullptr;
StringRef UniqueDeclName;
LValue IVLVal;
llvm::Function *FoundFn = nullptr;
SourceLocation Loc;

12492public:
bool VisitDeclRefExpr(const DeclRefExpr *E) {
  for (const CGOpenMPRuntime::LastprivateConditionalData &D :
       llvm::reverse(LPM)) {
    auto It = D.DeclToUniqueName.find(E->getDecl());
    if (It == D.DeclToUniqueName.end())
      continue;
    if (D.Disabled)
      return false;
    FoundE = E;
    FoundD = E->getDecl()->getCanonicalDecl();
    UniqueDeclName = It->second;
    IVLVal = D.IVLVal;
    FoundFn = D.Fn;
    break;
  }
  return FoundE == E;
}
bool VisitMemberExpr(const MemberExpr *E) {
  if (!CodeGenFunction::IsWrappedCXXThis(E->getBase()))
    return false;
  for (const CGOpenMPRuntime::LastprivateConditionalData &D :
       llvm::reverse(LPM)) {
    auto It = D.DeclToUniqueName.find(E->getMemberDecl());
    if (It == D.DeclToUniqueName.end())
      continue;
    if (D.Disabled)
      return false;
    FoundE = E;
    FoundD = E->getMemberDecl()->getCanonicalDecl();
    UniqueDeclName = It->second;
    IVLVal = D.IVLVal;
    FoundFn = D.Fn;
    break;
  }
  return FoundE == E;
}
bool VisitStmt(const Stmt *S) {
  for (const Stmt *Child : S->children()) {
    if (!Child)
      continue;
    if (const auto *E = dyn_cast<Expr>(Child))
      if (!E->isGLValue())
        continue;
    if (Visit(Child))
      return true;
  }
  return false;
}
explicit LastprivateConditionalRefChecker(
    ArrayRef<CGOpenMPRuntime::LastprivateConditionalData> LPM)
    : LPM(LPM) {}
std::tuple<const Expr *, const Decl *, StringRef, LValue, llvm::Function *>
getFoundData() const {
  return std::make_tuple(FoundE, FoundD, UniqueDeclName, IVLVal, FoundFn);
}
12548};
12549} // namespace

12551void CGOpenMPRuntime::emitLastprivateConditionalUpdate(CodeGenFunction &CGF,
                                                     LValue IVLVal,
                                                     StringRef UniqueDeclName,
                                                     LValue LVal,
                                                     SourceLocation Loc) {
// Last updated loop counter for the lastprivate conditional var.
// int<xx> last_iv = 0;
llvm::Type *LLIVTy = CGF.ConvertTypeForMem(IVLVal.getType());
llvm::Constant *LastIV =
    getOrCreateInternalVariable(LLIVTy, getName({UniqueDeclName, "iv"}));
cast<llvm::GlobalVariable>(LastIV)->setAlignment(
    IVLVal.getAlignment().getAsAlign());
LValue LastIVLVal = CGF.MakeNaturalAlignAddrLValue(LastIV, IVLVal.getType());

// Last value of the lastprivate conditional.
// decltype(priv_a) last_a;
llvm::Constant *Last = getOrCreateInternalVariable(
    CGF.ConvertTypeForMem(LVal.getType()), UniqueDeclName);
cast<llvm::GlobalVariable>(Last)->setAlignment(
    LVal.getAlignment().getAsAlign());
LValue LastLVal =
    CGF.MakeAddrLValue(Last, LVal.getType(), LVal.getAlignment());

// Global loop counter. Required to handle inner parallel-for regions.
// iv
llvm::Value *IVVal = CGF.EmitLoadOfScalar(IVLVal, Loc);

// #pragma omp critical(a)
// if (last_iv <= iv) {
//   last_iv = iv;
//   last_a = priv_a;
// }
auto &&CodeGen = [&LastIVLVal, &IVLVal, IVVal, &LVal, &LastLVal,
                  Loc](CodeGenFunction &CGF, PrePostActionTy &Action) {
  Action.Enter(CGF);
  llvm::Value *LastIVVal = CGF.EmitLoadOfScalar(LastIVLVal, Loc);
  // (last_iv <= iv) ? Check if the variable is updated and store new
  // value in global var.
  llvm::Value *CmpRes;
  if (IVLVal.getType()->isSignedIntegerType()) {
    CmpRes = CGF.Builder.CreateICmpSLE(LastIVVal, IVVal);
  } else {
    assert(IVLVal.getType()->isUnsignedIntegerType() &&((void)0)
           "Loop iteration variable must be integer.")((void)0);
    CmpRes = CGF.Builder.CreateICmpULE(LastIVVal, IVVal);
  }
  llvm::BasicBlock *ThenBB = CGF.createBasicBlock("lp_cond_then");
  llvm::BasicBlock *ExitBB = CGF.createBasicBlock("lp_cond_exit");
  CGF.Builder.CreateCondBr(CmpRes, ThenBB, ExitBB);
  // {
  CGF.EmitBlock(ThenBB);

  //   last_iv = iv;
  CGF.EmitStoreOfScalar(IVVal, LastIVLVal);

  //   last_a = priv_a;
  switch (CGF.getEvaluationKind(LVal.getType())) {
  case TEK_Scalar: {
    llvm::Value *PrivVal = CGF.EmitLoadOfScalar(LVal, Loc);
    CGF.EmitStoreOfScalar(PrivVal, LastLVal);
    break;
  }
  case TEK_Complex: {
    CodeGenFunction::ComplexPairTy PrivVal = CGF.EmitLoadOfComplex(LVal, Loc);
    CGF.EmitStoreOfComplex(PrivVal, LastLVal, /*isInit=*/false);
    break;
  }
  case TEK_Aggregate:
    llvm_unreachable(__builtin_unreachable()
        "Aggregates are not supported in lastprivate conditional.")__builtin_unreachable();
  }
  // }
  CGF.EmitBranch(ExitBB);
  // There is no need to emit line number for unconditional branch.
  (void)ApplyDebugLocation::CreateEmpty(CGF);
  CGF.EmitBlock(ExitBB, /*IsFinished=*/true);
};

if (CGM.getLangOpts().OpenMPSimd) {
  // Do not emit as a critical region as no parallel region could be emitted.
  RegionCodeGenTy ThenRCG(CodeGen);
  ThenRCG(CGF);
} else {
  emitCriticalRegion(CGF, UniqueDeclName, CodeGen, Loc);
}
12636}

12638void CGOpenMPRuntime::checkAndEmitLastprivateConditional(CodeGenFunction &CGF,
                                                       const Expr *LHS) {
if (CGF.getLangOpts().OpenMP < 50 || LastprivateConditionalStack.empty())
  return;
LastprivateConditionalRefChecker Checker(LastprivateConditionalStack);
if (!Checker.Visit(LHS))
  return;
const Expr *FoundE;
const Decl *FoundD;
StringRef UniqueDeclName;
LValue IVLVal;
llvm::Function *FoundFn;
std::tie(FoundE, FoundD, UniqueDeclName, IVLVal, FoundFn) =
    Checker.getFoundData();
if (FoundFn != CGF.CurFn) {
  // Special codegen for inner parallel regions.
  // ((struct.lastprivate.conditional*)&priv_a)->Fired = 1;
  auto It = LastprivateConditionalToTypes[FoundFn].find(FoundD);
  assert(It != LastprivateConditionalToTypes[FoundFn].end() &&((void)0)
         "Lastprivate conditional is not found in outer region.")((void)0);
  QualType StructTy = std::get<0>(It->getSecond());
  const FieldDecl* FiredDecl = std::get<2>(It->getSecond());
  LValue PrivLVal = CGF.EmitLValue(FoundE);
  Address StructAddr = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
      PrivLVal.getAddress(CGF),
      CGF.ConvertTypeForMem(CGF.getContext().getPointerType(StructTy)));
  LValue BaseLVal =
      CGF.MakeAddrLValue(StructAddr, StructTy, AlignmentSource::Decl);
  LValue FiredLVal = CGF.EmitLValueForField(BaseLVal, FiredDecl);
  CGF.EmitAtomicStore(RValue::get(llvm::ConstantInt::get(
                          CGF.ConvertTypeForMem(FiredDecl->getType()), 1)),
                      FiredLVal, llvm::AtomicOrdering::Unordered,
                      /*IsVolatile=*/true, /*isInit=*/false);
  return;
}

// Private address of the lastprivate conditional in the current context.
// priv_a
LValue LVal = CGF.EmitLValue(FoundE);
emitLastprivateConditionalUpdate(CGF, IVLVal, UniqueDeclName, LVal,
                                 FoundE->getExprLoc());
12679}

12681void CGOpenMPRuntime::checkAndEmitSharedLastprivateConditional(
  CodeGenFunction &CGF, const OMPExecutableDirective &D,
  const llvm::DenseSet<CanonicalDeclPtr<const VarDecl>> &IgnoredDecls) {
if (CGF.getLangOpts().OpenMP < 50 || LastprivateConditionalStack.empty())
  return;
auto Range = llvm::reverse(LastprivateConditionalStack);
auto It = llvm::find_if(
    Range, [](const LastprivateConditionalData &D) { return !D.Disabled; });
if (It == Range.end() || It->Fn != CGF.CurFn)
  return;
auto LPCI = LastprivateConditionalToTypes.find(It->Fn);
assert(LPCI != LastprivateConditionalToTypes.end() &&((void)0)
       "Lastprivates must be registered already.")((void)0);
SmallVector<OpenMPDirectiveKind, 4> CaptureRegions;
getOpenMPCaptureRegions(CaptureRegions, D.getDirectiveKind());
const CapturedStmt *CS = D.getCapturedStmt(CaptureRegions.back());
for (const auto &Pair : It->DeclToUniqueName) {
  const auto *VD = cast<VarDecl>(Pair.first->getCanonicalDecl());
  if (!CS->capturesVariable(VD) || IgnoredDecls.count(VD) > 0)
    continue;
  auto I = LPCI->getSecond().find(Pair.first);
  assert(I != LPCI->getSecond().end() &&((void)0)
         "Lastprivate must be rehistered already.")((void)0);
  // bool Cmp = priv_a.Fired != 0;
  LValue BaseLVal = std::get<3>(I->getSecond());
  LValue FiredLVal =
      CGF.EmitLValueForField(BaseLVal, std::get<2>(I->getSecond()));
  llvm::Value *Res = CGF.EmitLoadOfScalar(FiredLVal, D.getBeginLoc());
  llvm::Value *Cmp = CGF.Builder.CreateIsNotNull(Res);
  llvm::BasicBlock *ThenBB = CGF.createBasicBlock("lpc.then");
  llvm::BasicBlock *DoneBB = CGF.createBasicBlock("lpc.done");
  // if (Cmp) {
  CGF.Builder.CreateCondBr(Cmp, ThenBB, DoneBB);
  CGF.EmitBlock(ThenBB);
  Address Addr = CGF.GetAddrOfLocalVar(VD);
  LValue LVal;
  if (VD->getType()->isReferenceType())
    LVal = CGF.EmitLoadOfReferenceLValue(Addr, VD->getType(),
                                         AlignmentSource::Decl);
  else
    LVal = CGF.MakeAddrLValue(Addr, VD->getType().getNonReferenceType(),
                              AlignmentSource::Decl);
  emitLastprivateConditionalUpdate(CGF, It->IVLVal, Pair.second, LVal,
                                   D.getBeginLoc());
  auto AL = ApplyDebugLocation::CreateArtificial(CGF);
  CGF.EmitBlock(DoneBB, /*IsFinal=*/true);
  // }
}
12729}

12731void CGOpenMPRuntime::emitLastprivateConditionalFinalUpdate(
  CodeGenFunction &CGF, LValue PrivLVal, const VarDecl *VD,
  SourceLocation Loc) {
if (CGF.getLangOpts().OpenMP < 50)
  return;
auto It = LastprivateConditionalStack.back().DeclToUniqueName.find(VD);
assert(It != LastprivateConditionalStack.back().DeclToUniqueName.end() &&((void)0)
       "Unknown lastprivate conditional variable.")((void)0);
StringRef UniqueName = It->second;
llvm::GlobalVariable *GV = CGM.getModule().getNamedGlobal(UniqueName);
// The variable was not updated in the region - exit.
if (!GV)
  return;
LValue LPLVal = CGF.MakeAddrLValue(
    GV, PrivLVal.getType().getNonReferenceType(), PrivLVal.getAlignment());
llvm::Value *Res = CGF.EmitLoadOfScalar(LPLVal, Loc);
CGF.EmitStoreOfScalar(Res, PrivLVal);
12748}

12750llvm::Function *CGOpenMPSIMDRuntime::emitParallelOutlinedFunction(
  const OMPExecutableDirective &D, const VarDecl *ThreadIDVar,
  OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12754}

12756llvm::Function *CGOpenMPSIMDRuntime::emitTeamsOutlinedFunction(
  const OMPExecutableDirective &D, const VarDecl *ThreadIDVar,
  OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12760}

12762llvm::Function *CGOpenMPSIMDRuntime::emitTaskOutlinedFunction(
  const OMPExecutableDirective &D, const VarDecl *ThreadIDVar,
  const VarDecl *PartIDVar, const VarDecl *TaskTVar,
  OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen,
  bool Tied, unsigned &NumberOfParts) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12768}

12770void CGOpenMPSIMDRuntime::emitParallelCall(CodeGenFunction &CGF,
                                         SourceLocation Loc,
                                         llvm::Function *OutlinedFn,
                                         ArrayRef<llvm::Value *> CapturedVars,
                                         const Expr *IfCond) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12776}

12778void CGOpenMPSIMDRuntime::emitCriticalRegion(
  CodeGenFunction &CGF, StringRef CriticalName,
  const RegionCodeGenTy &CriticalOpGen, SourceLocation Loc,
  const Expr *Hint) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12783}

12785void CGOpenMPSIMDRuntime::emitMasterRegion(CodeGenFunction &CGF,
                                         const RegionCodeGenTy &MasterOpGen,
                                         SourceLocation Loc) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12789}

12791void CGOpenMPSIMDRuntime::emitMaskedRegion(CodeGenFunction &CGF,
                                         const RegionCodeGenTy &MasterOpGen,
                                         SourceLocation Loc,
                                         const Expr *Filter) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12796}

12798void CGOpenMPSIMDRuntime::emitTaskyieldCall(CodeGenFunction &CGF,
                                          SourceLocation Loc) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12801}

12803void CGOpenMPSIMDRuntime::emitTaskgroupRegion(
  CodeGenFunction &CGF, const RegionCodeGenTy &TaskgroupOpGen,
  SourceLocation Loc) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12807}

12809void CGOpenMPSIMDRuntime::emitSingleRegion(
  CodeGenFunction &CGF, const RegionCodeGenTy &SingleOpGen,
  SourceLocation Loc, ArrayRef<const Expr *> CopyprivateVars,
  ArrayRef<const Expr *> DestExprs, ArrayRef<const Expr *> SrcExprs,
  ArrayRef<const Expr *> AssignmentOps) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12815}

12817void CGOpenMPSIMDRuntime::emitOrderedRegion(CodeGenFunction &CGF,
                                          const RegionCodeGenTy &OrderedOpGen,
                                          SourceLocation Loc,
                                          bool IsThreads) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12822}

12824void CGOpenMPSIMDRuntime::emitBarrierCall(CodeGenFunction &CGF,
                                        SourceLocation Loc,
                                        OpenMPDirectiveKind Kind,
                                        bool EmitChecks,
                                        bool ForceSimpleCall) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12830}

12832void CGOpenMPSIMDRuntime::emitForDispatchInit(
  CodeGenFunction &CGF, SourceLocation Loc,
  const OpenMPScheduleTy &ScheduleKind, unsigned IVSize, bool IVSigned,
  bool Ordered, const DispatchRTInput &DispatchValues) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12837}

12839void CGOpenMPSIMDRuntime::emitForStaticInit(
  CodeGenFunction &CGF, SourceLocation Loc, OpenMPDirectiveKind DKind,
  const OpenMPScheduleTy &ScheduleKind, const StaticRTInput &Values) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12843}

12845void CGOpenMPSIMDRuntime::emitDistributeStaticInit(
  CodeGenFunction &CGF, SourceLocation Loc,
  OpenMPDistScheduleClauseKind SchedKind, const StaticRTInput &Values) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12849}

12851void CGOpenMPSIMDRuntime::emitForOrderedIterationEnd(CodeGenFunction &CGF,
                                                   SourceLocation Loc,
                                                   unsigned IVSize,
                                                   bool IVSigned) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12856}

12858void CGOpenMPSIMDRuntime::emitForStaticFinish(CodeGenFunction &CGF,
                                            SourceLocation Loc,
                                            OpenMPDirectiveKind DKind) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12862}

12864llvm::Value *CGOpenMPSIMDRuntime::emitForNext(CodeGenFunction &CGF,
                                            SourceLocation Loc,
                                            unsigned IVSize, bool IVSigned,
                                            Address IL, Address LB,
                                            Address UB, Address ST) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12870}

12872void CGOpenMPSIMDRuntime::emitNumThreadsClause(CodeGenFunction &CGF,
                                             llvm::Value *NumThreads,
                                             SourceLocation Loc) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12876}

12878void CGOpenMPSIMDRuntime::emitProcBindClause(CodeGenFunction &CGF,
                                           ProcBindKind ProcBind,
                                           SourceLocation Loc) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12882}

12884Address CGOpenMPSIMDRuntime::getAddrOfThreadPrivate(CodeGenFunction &CGF,
                                                  const VarDecl *VD,
                                                  Address VDAddr,
                                                  SourceLocation Loc) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12889}

12891llvm::Function *CGOpenMPSIMDRuntime::emitThreadPrivateVarDefinition(
  const VarDecl *VD, Address VDAddr, SourceLocation Loc, bool PerformInit,
  CodeGenFunction *CGF) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12895}

12897Address CGOpenMPSIMDRuntime::getAddrOfArtificialThreadPrivate(
  CodeGenFunction &CGF, QualType VarType, StringRef Name) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12900}

12902void CGOpenMPSIMDRuntime::emitFlush(CodeGenFunction &CGF,
                                  ArrayRef<const Expr *> Vars,
                                  SourceLocation Loc,
                                  llvm::AtomicOrdering AO) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12907}

12909void CGOpenMPSIMDRuntime::emitTaskCall(CodeGenFunction &CGF, SourceLocation Loc,
                                     const OMPExecutableDirective &D,
                                     llvm::Function *TaskFunction,
                                     QualType SharedsTy, Address Shareds,
                                     const Expr *IfCond,
                                     const OMPTaskDataTy &Data) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12916}

12918void CGOpenMPSIMDRuntime::emitTaskLoopCall(
  CodeGenFunction &CGF, SourceLocation Loc, const OMPLoopDirective &D,
  llvm::Function *TaskFunction, QualType SharedsTy, Address Shareds,
  const Expr *IfCond, const OMPTaskDataTy &Data) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12923}

12925void CGOpenMPSIMDRuntime::emitReduction(
  CodeGenFunction &CGF, SourceLocation Loc, ArrayRef<const Expr *> Privates,
  ArrayRef<const Expr *> LHSExprs, ArrayRef<const Expr *> RHSExprs,
  ArrayRef<const Expr *> ReductionOps, ReductionOptionsTy Options) {
assert(Options.SimpleReduction && "Only simple reduction is expected.")((void)0);
CGOpenMPRuntime::emitReduction(CGF, Loc, Privates, LHSExprs, RHSExprs,
                               ReductionOps, Options);
12932}

12934llvm::Value *CGOpenMPSIMDRuntime::emitTaskReductionInit(
  CodeGenFunction &CGF, SourceLocation Loc, ArrayRef<const Expr *> LHSExprs,
  ArrayRef<const Expr *> RHSExprs, const OMPTaskDataTy &Data) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12938}

12940void CGOpenMPSIMDRuntime::emitTaskReductionFini(CodeGenFunction &CGF,
                                              SourceLocation Loc,
                                              bool IsWorksharingReduction) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12944}

12946void CGOpenMPSIMDRuntime::emitTaskReductionFixups(CodeGenFunction &CGF,
                                                SourceLocation Loc,
                                                ReductionCodeGen &RCG,
                                                unsigned N) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12951}

12953Address CGOpenMPSIMDRuntime::getTaskReductionItem(CodeGenFunction &CGF,
                                                SourceLocation Loc,
                                                llvm::Value *ReductionsPtr,
                                                LValue SharedLVal) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12958}

12960void CGOpenMPSIMDRuntime::emitTaskwaitCall(CodeGenFunction &CGF,
                                         SourceLocation Loc) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12963}

12965void CGOpenMPSIMDRuntime::emitCancellationPointCall(
  CodeGenFunction &CGF, SourceLocation Loc,
  OpenMPDirectiveKind CancelRegion) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12969}

12971void CGOpenMPSIMDRuntime::emitCancelCall(CodeGenFunction &CGF,
                                       SourceLocation Loc, const Expr *IfCond,
                                       OpenMPDirectiveKind CancelRegion) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12975}

12977void CGOpenMPSIMDRuntime::emitTargetOutlinedFunction(
  const OMPExecutableDirective &D, StringRef ParentName,
  llvm::Function *&OutlinedFn, llvm::Constant *&OutlinedFnID,
  bool IsOffloadEntry, const RegionCodeGenTy &CodeGen) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12982}

12984void CGOpenMPSIMDRuntime::emitTargetCall(
  CodeGenFunction &CGF, const OMPExecutableDirective &D,
  llvm::Function *OutlinedFn, llvm::Value *OutlinedFnID, const Expr *IfCond,
  llvm::PointerIntPair<const Expr *, 2, OpenMPDeviceClauseModifier> Device,
  llvm::function_ref<llvm::Value *(CodeGenFunction &CGF,
                                   const OMPLoopDirective &D)>
      SizeEmitter) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12992}

12994bool CGOpenMPSIMDRuntime::emitTargetFunctions(GlobalDecl GD) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
12996}

12998bool CGOpenMPSIMDRuntime::emitTargetGlobalVariable(GlobalDecl GD) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
13000}

13002bool CGOpenMPSIMDRuntime::emitTargetGlobal(GlobalDecl GD) {
return false;
13004}

13006void CGOpenMPSIMDRuntime::emitTeamsCall(CodeGenFunction &CGF,
                                      const OMPExecutableDirective &D,
                                      SourceLocation Loc,
                                      llvm::Function *OutlinedFn,
                                      ArrayRef<llvm::Value *> CapturedVars) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
13012}

13014void CGOpenMPSIMDRuntime::emitNumTeamsClause(CodeGenFunction &CGF,
                                           const Expr *NumTeams,
                                           const Expr *ThreadLimit,
                                           SourceLocation Loc) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
13019}

13021void CGOpenMPSIMDRuntime::emitTargetDataCalls(
  CodeGenFunction &CGF, const OMPExecutableDirective &D, const Expr *IfCond,
  const Expr *Device, const RegionCodeGenTy &CodeGen, TargetDataInfo &Info) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
13025}

13027void CGOpenMPSIMDRuntime::emitTargetDataStandAloneCall(
  CodeGenFunction &CGF, const OMPExecutableDirective &D, const Expr *IfCond,
  const Expr *Device) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
13031}

13033void CGOpenMPSIMDRuntime::emitDoacrossInit(CodeGenFunction &CGF,
                                         const OMPLoopDirective &D,
                                         ArrayRef<Expr *> NumIterations) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
13037}

13039void CGOpenMPSIMDRuntime::emitDoacrossOrdered(CodeGenFunction &CGF,
                                            const OMPDependClause *C) {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
13042}

13044const VarDecl *
13045CGOpenMPSIMDRuntime::translateParameter(const FieldDecl *FD,
                                      const VarDecl *NativeParam) const {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
13048}

13050Address
13051CGOpenMPSIMDRuntime::getParameterAddress(CodeGenFunction &CGF,
                                       const VarDecl *NativeParam,
                                       const VarDecl *TargetParam) const {
llvm_unreachable("Not supported in SIMD-only mode")__builtin_unreachable();
13055}

←

/usr/src/gnu/usr.bin/clang/libclangCodeGen/../../../llvm/llvm/include/llvm/ADT/APInt.h

→

1//===-- llvm/ADT/APInt.h - For Arbitrary Precision Integer -----*- C++ -*--===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8///
9/// \file
10/// This file implements a class to represent arbitrary precision
11/// integral constant values and operations on them.
12///
13//===----------------------------------------------------------------------===//

15#ifndef LLVM_ADT_APINT_H
16#define LLVM_ADT_APINT_H

18#include "llvm/Support/Compiler.h"
19#include "llvm/Support/MathExtras.h"
20#include <cassert>
21#include <climits>
22#include <cstring>
23#include <utility>

25namespace llvm {
26class FoldingSetNodeID;
27class StringRef;
28class hash_code;
29class raw_ostream;

31template <typename T> class SmallVectorImpl;
32template <typename T> class ArrayRef;
33template <typename T> class Optional;
34template <typename T> struct DenseMapInfo;

36class APInt;

38inline APInt operator-(APInt);

40//===----------------------------------------------------------------------===//
41//                              APInt Class
42//===----------------------------------------------------------------------===//

44/// Class for arbitrary precision integers.
45///
46/// APInt is a functional replacement for common case unsigned integer type like
47/// "unsigned", "unsigned long" or "uint64_t", but also allows non-byte-width
48/// integer sizes and large integer value types such as 3-bits, 15-bits, or more
49/// than 64-bits of precision. APInt provides a variety of arithmetic operators
50/// and methods to manipulate integer values of any bit-width. It supports both
51/// the typical integer arithmetic and comparison operations as well as bitwise
52/// manipulation.
53///
54/// The class has several invariants worth noting:
55///   * All bit, byte, and word positions are zero-based.
56///   * Once the bit width is set, it doesn't change except by the Truncate,
57///     SignExtend, or ZeroExtend operations.
58///   * All binary operators must be on APInt instances of the same bit width.
59///     Attempting to use these operators on instances with different bit
60///     widths will yield an assertion.
61///   * The value is stored canonically as an unsigned value. For operations
62///     where it makes a difference, there are both signed and unsigned variants
63///     of the operation. For example, sdiv and udiv. However, because the bit
64///     widths must be the same, operations such as Mul and Add produce the same
65///     results regardless of whether the values are interpreted as signed or
66///     not.
67///   * In general, the class tries to follow the style of computation that LLVM
68///     uses in its IR. This simplifies its use for LLVM.
69///
70class LLVM_NODISCARD[[clang::warn_unused_result]] APInt {
71public:
typedef uint64_t WordType;

/// This enum is used to hold the constants we needed for APInt.
enum : unsigned {
  /// Byte size of a word.
  APINT_WORD_SIZE = sizeof(WordType),
  /// Bits in a word.
  APINT_BITS_PER_WORD = APINT_WORD_SIZE * CHAR_BIT8
};

enum class Rounding {
  DOWN,
  TOWARD_ZERO,
  UP,
};

static constexpr WordType WORDTYPE_MAX = ~WordType(0);

90private:
/// This union is used to store the integer value. When the
/// integer bit-width <= 64, it uses VAL, otherwise it uses pVal.
union {
  uint64_t VAL;   ///< Used to store the <= 64 bits integer value.
  uint64_t *pVal; ///< Used to store the >64 bits integer value.
} U;

unsigned BitWidth; ///< The number of bits in this APInt.

friend struct DenseMapInfo<APInt>;

friend class APSInt;

/// Fast internal constructor
///
/// This constructor is used only internally for speed of construction of
/// temporaries. It is unsafe for general use so it is not public.
APInt(uint64_t *val, unsigned bits) : BitWidth(bits) {
  U.pVal = val;
}

/// Determine which word a bit is in.
///
/// \returns the word position for the specified bit position.
static unsigned whichWord(unsigned bitPosition) {
  return bitPosition / APINT_BITS_PER_WORD;
}

/// Determine which bit in a word a bit is in.
///
/// \returns the bit position in a word for the specified bit position
/// in the APInt.
static unsigned whichBit(unsigned bitPosition) {
  return bitPosition % APINT_BITS_PER_WORD;
}

/// Get a single bit mask.
///
/// \returns a uint64_t with only bit at "whichBit(bitPosition)" set
/// This method generates and returns a uint64_t (word) mask for a single
/// bit at a specific bit position. This is used to mask the bit in the
/// corresponding word.
static uint64_t maskBit(unsigned bitPosition) {
  return 1ULL << whichBit(bitPosition);
}

/// Clear unused high order bits
///
/// This method is used internally to clear the top "N" bits in the high order
/// word that are not used by the APInt. This is needed after the most
/// significant word is assigned a value to ensure that those bits are
/// zero'd out.
APInt &clearUnusedBits() {
  // Compute how many bits are used in the final word
  unsigned WordBits = ((BitWidth-1) % APINT_BITS_PER_WORD) + 1;

  // Mask out the high bits.
  uint64_t mask = WORDTYPE_MAX >> (APINT_BITS_PER_WORD - WordBits);
  if (isSingleWord())
    U.VAL &= mask;
  else
    U.pVal[getNumWords() - 1] &= mask;
  return *this;
}

/// Get the word corresponding to a bit position
/// \returns the corresponding word for the specified bit position.
uint64_t getWord(unsigned bitPosition) const {
  return isSingleWord() ? U.VAL : U.pVal[whichWord(bitPosition)];
}

/// Utility method to change the bit width of this APInt to new bit width,
/// allocating and/or deallocating as necessary. There is no guarantee on the
/// value of any bits upon return. Caller should populate the bits after.
void reallocate(unsigned NewBitWidth);

/// Convert a char array into an APInt
///
/// \param radix 2, 8, 10, 16, or 36
/// Converts a string into a number.  The string must be non-empty
/// and well-formed as a number of the given base. The bit-width
/// must be sufficient to hold the result.
///
/// This is used by the constructors that take string arguments.
///
/// StringRef::getAsInteger is superficially similar but (1) does
/// not assume that the string is well-formed and (2) grows the
/// result to hold the input.
void fromString(unsigned numBits, StringRef str, uint8_t radix);

/// An internal division function for dividing APInts.
///
/// This is used by the toString method to divide by the radix. It simply
/// provides a more convenient form of divide for internal use since KnuthDiv
/// has specific constraints on its inputs. If those constraints are not met
/// then it provides a simpler form of divide.
static void divide(const WordType *LHS, unsigned lhsWords,
                   const WordType *RHS, unsigned rhsWords, WordType *Quotient,
                   WordType *Remainder);

/// out-of-line slow case for inline constructor
void initSlowCase(uint64_t val, bool isSigned);

/// shared code between two array constructors
void initFromArray(ArrayRef<uint64_t> array);

/// out-of-line slow case for inline copy constructor
void initSlowCase(const APInt &that);

/// out-of-line slow case for shl
void shlSlowCase(unsigned ShiftAmt);

/// out-of-line slow case for lshr.
void lshrSlowCase(unsigned ShiftAmt);

/// out-of-line slow case for ashr.
void ashrSlowCase(unsigned ShiftAmt);

/// out-of-line slow case for operator=
void AssignSlowCase(const APInt &RHS);

/// out-of-line slow case for operator==
bool EqualSlowCase(const APInt &RHS) const LLVM_READONLY__attribute__((__pure__));

/// out-of-line slow case for countLeadingZeros
unsigned countLeadingZerosSlowCase() const LLVM_READONLY__attribute__((__pure__));

/// out-of-line slow case for countLeadingOnes.
unsigned countLeadingOnesSlowCase() const LLVM_READONLY__attribute__((__pure__));

/// out-of-line slow case for countTrailingZeros.
unsigned countTrailingZerosSlowCase() const LLVM_READONLY__attribute__((__pure__));

/// out-of-line slow case for countTrailingOnes
unsigned countTrailingOnesSlowCase() const LLVM_READONLY__attribute__((__pure__));

/// out-of-line slow case for countPopulation
unsigned countPopulationSlowCase() const LLVM_READONLY__attribute__((__pure__));

/// out-of-line slow case for intersects.
bool intersectsSlowCase(const APInt &RHS) const LLVM_READONLY__attribute__((__pure__));

/// out-of-line slow case for isSubsetOf.
bool isSubsetOfSlowCase(const APInt &RHS) const LLVM_READONLY__attribute__((__pure__));

/// out-of-line slow case for setBits.
void setBitsSlowCase(unsigned loBit, unsigned hiBit);

/// out-of-line slow case for flipAllBits.
void flipAllBitsSlowCase();

/// out-of-line slow case for operator&=.
void AndAssignSlowCase(const APInt& RHS);

/// out-of-line slow case for operator|=.
void OrAssignSlowCase(const APInt& RHS);

/// out-of-line slow case for operator^=.
void XorAssignSlowCase(const APInt& RHS);

/// Unsigned comparison. Returns -1, 0, or 1 if this APInt is less than, equal
/// to, or greater than RHS.
int compare(const APInt &RHS) const LLVM_READONLY__attribute__((__pure__));

/// Signed comparison. Returns -1, 0, or 1 if this APInt is less than, equal
/// to, or greater than RHS.
int compareSigned(const APInt &RHS) const LLVM_READONLY__attribute__((__pure__));

259public:
/// \name Constructors
/// @{

/// Create a new APInt of numBits width, initialized as val.
///
/// If isSigned is true then val is treated as if it were a signed value
/// (i.e. as an int64_t) and the appropriate sign extension to the bit width
/// will be done. Otherwise, no sign extension occurs (high order bits beyond
/// the range of val are zero filled).
///
/// \param numBits the bit width of the constructed APInt
/// \param val the initial value of the APInt
/// \param isSigned how to treat signedness of val
APInt(unsigned numBits, uint64_t val, bool isSigned = false)
    : BitWidth(numBits) {
  assert(BitWidth && "bitwidth too small")((void)0);
  if (isSingleWord()) {
    U.VAL = val;
    clearUnusedBits();
  } else {
    initSlowCase(val, isSigned);
  }
}

/// Construct an APInt of numBits width, initialized as bigVal[].
///
/// Note that bigVal.size() can be smaller or larger than the corresponding
/// bit width but any extraneous bits will be dropped.
///
/// \param numBits the bit width of the constructed APInt
/// \param bigVal a sequence of words to form the initial value of the APInt
APInt(unsigned numBits, ArrayRef<uint64_t> bigVal);

/// Equivalent to APInt(numBits, ArrayRef<uint64_t>(bigVal, numWords)), but
/// deprecated because this constructor is prone to ambiguity with the
/// APInt(unsigned, uint64_t, bool) constructor.
///
/// If this overload is ever deleted, care should be taken to prevent calls
/// from being incorrectly captured by the APInt(unsigned, uint64_t, bool)
/// constructor.
APInt(unsigned numBits, unsigned numWords, const uint64_t bigVal[]);

/// Construct an APInt from a string representation.
///
/// This constructor interprets the string \p str in the given radix. The
/// interpretation stops when the first character that is not suitable for the
/// radix is encountered, or the end of the string. Acceptable radix values
/// are 2, 8, 10, 16, and 36. It is an error for the value implied by the
/// string to require more bits than numBits.
///
/// \param numBits the bit width of the constructed APInt
/// \param str the string to be interpreted
/// \param radix the radix to use for the conversion
APInt(unsigned numBits, StringRef str, uint8_t radix);

/// Simply makes *this a copy of that.
/// Copy Constructor.
APInt(const APInt &that) : BitWidth(that.BitWidth) {
  if (isSingleWord())
    U.VAL = that.U.VAL;
  else
    initSlowCase(that);
}

/// Move Constructor.
APInt(APInt &&that) : BitWidth(that.BitWidth) {
  memcpy(&U, &that.U, sizeof(U));
  that.BitWidth = 0;
}

/// Destructor.
~APInt() {
  if (needsCleanup())
    delete[] U.pVal;
}

/// Default constructor that creates an uninteresting APInt
/// representing a 1-bit zero value.
///
/// This is useful for object deserialization (pair this with the static
///  method Read).
explicit APInt() : BitWidth(1) { U.VAL = 0; }

/// Returns whether this instance allocated memory.
bool needsCleanup() const { return !isSingleWord(); }

/// Used to insert APInt objects, or objects that contain APInt objects, into
///  FoldingSets.
void Profile(FoldingSetNodeID &id) const;

/// @}
/// \name Value Tests
/// @{

/// Determine if this APInt just has one word to store value.
///
/// \returns true if the number of bits <= 64, false otherwise.
bool isSingleWord() const { return BitWidth <= APINT_BITS_PER_WORD; }

/// Determine sign of this APInt.
///
/// This tests the high bit of this APInt to determine if it is set.
///
/// \returns true if this APInt is negative, false otherwise
bool isNegative() const { return (*this)[BitWidth - 1]; }

/// Determine if this APInt Value is non-negative (>= 0)
///
/// This tests the high bit of the APInt to determine if it is unset.
bool isNonNegative() const { return !isNegative(); }

/// Determine if sign bit of this APInt is set.
///
/// This tests the high bit of this APInt to determine if it is set.
///
/// \returns true if this APInt has its sign bit set, false otherwise.
bool isSignBitSet() const { return (*this)[BitWidth-1]; }

/// Determine if sign bit of this APInt is clear.
///
/// This tests the high bit of this APInt to determine if it is clear.
///
/// \returns true if this APInt has its sign bit clear, false otherwise.
bool isSignBitClear() const { return !isSignBitSet(); }

/// Determine if this APInt Value is positive.
///
/// This tests if the value of this APInt is positive (> 0). Note
/// that 0 is not a positive value.
///
/// \returns true if this APInt is positive.
bool isStrictlyPositive() const { return isNonNegative() && !isNullValue(); }

/// Determine if this APInt Value is non-positive (<= 0).
///
/// \returns true if this APInt is non-positive.
bool isNonPositive() const { return !isStrictlyPositive(); }

/// Determine if all bits are set
///
/// This checks to see if the value has all bits of the APInt are set or not.
bool isAllOnesValue() const {
  if (isSingleWord())
    return U.VAL == WORDTYPE_MAX >> (APINT_BITS_PER_WORD - BitWidth);
  return countTrailingOnesSlowCase() == BitWidth;
}

/// Determine if all bits are clear
///
/// This checks to see if the value has all bits of the APInt are clear or
/// not.
bool isNullValue() const { return !*this; }

/// Determine if this is a value of 1.
///
/// This checks to see if the value of this APInt is one.
bool isOneValue() const {
  if (isSingleWord())
    return U.VAL == 1;
  return countLeadingZerosSlowCase() == BitWidth - 1;
}

/// Determine if this is the largest unsigned value.
///
/// This checks to see if the value of this APInt is the maximum unsigned
/// value for the APInt's bit width.
bool isMaxValue() const { return isAllOnesValue(); }

/// Determine if this is the largest signed value.
///
/// This checks to see if the value of this APInt is the maximum signed
/// value for the APInt's bit width.
bool isMaxSignedValue() const {
  if (isSingleWord())
    return U.VAL == ((WordType(1) << (BitWidth - 1)) - 1);
  return !isNegative() && countTrailingOnesSlowCase() == BitWidth - 1;
}

/// Determine if this is the smallest unsigned value.
///
/// This checks to see if the value of this APInt is the minimum unsigned
/// value for the APInt's bit width.
bool isMinValue() const { return isNullValue(); }

/// Determine if this is the smallest signed value.
///
/// This checks to see if the value of this APInt is the minimum signed
/// value for the APInt's bit width.
bool isMinSignedValue() const {
  if (isSingleWord())
    return U.VAL == (WordType(1) << (BitWidth - 1));
  return isNegative() && countTrailingZerosSlowCase() == BitWidth - 1;
}

/// Check if this APInt has an N-bits unsigned integer value.
bool isIntN(unsigned N) const {
  assert(N && "N == 0 ???")((void)0);
  return getActiveBits() <= N;
}

/// Check if this APInt has an N-bits signed integer value.
bool isSignedIntN(unsigned N) const {
  assert(N && "N == 0 ???")((void)0);
  return getMinSignedBits() <= N;
}

/// Check if this APInt's value is a power of two greater than zero.
///
/// \returns true if the argument APInt value is a power of two > 0.
bool isPowerOf2() const {
  if (isSingleWord())
    return isPowerOf2_64(U.VAL);
  return countPopulationSlowCase() == 1;
}

/// Check if the APInt's value is returned by getSignMask.
///
/// \returns true if this is the value returned by getSignMask.
bool isSignMask() const { return isMinSignedValue(); }

/// Convert APInt to a boolean value.
///
/// This converts the APInt to a boolean value as a test against zero.
bool getBoolValue() const { return !!*this; }

/// If this value is smaller than the specified limit, return it, otherwise
/// return the limit value.  This causes the value to saturate to the limit.
uint64_t getLimitedValue(uint64_t Limit = UINT64_MAX0xffffffffffffffffULL) const {
  return ugt(Limit) ? Limit : getZExtValue();
}

/// Check if the APInt consists of a repeated bit pattern.
///
/// e.g. 0x01010101 satisfies isSplat(8).
/// \param SplatSizeInBits The size of the pattern in bits. Must divide bit
/// width without remainder.
bool isSplat(unsigned SplatSizeInBits) const;

/// \returns true if this APInt value is a sequence of \param numBits ones
/// starting at the least significant bit with the remainder zero.
bool isMask(unsigned numBits) const {
  assert(numBits != 0 && "numBits must be non-zero")((void)0);
  assert(numBits <= BitWidth && "numBits out of range")((void)0);
  if (isSingleWord())
    return U.VAL == (WORDTYPE_MAX >> (APINT_BITS_PER_WORD - numBits));
  unsigned Ones = countTrailingOnesSlowCase();
  return (numBits == Ones) &&
         ((Ones + countLeadingZerosSlowCase()) == BitWidth);
}

/// \returns true if this APInt is a non-empty sequence of ones starting at
/// the least significant bit with the remainder zero.
/// Ex. isMask(0x0000FFFFU) == true.
bool isMask() const {
  if (isSingleWord())
    return isMask_64(U.VAL);
  unsigned Ones = countTrailingOnesSlowCase();
  return (Ones > 0) && ((Ones + countLeadingZerosSlowCase()) == BitWidth);
}

/// Return true if this APInt value contains a sequence of ones with
/// the remainder zero.
bool isShiftedMask() const {
  if (isSingleWord())
    return isShiftedMask_64(U.VAL);
  unsigned Ones = countPopulationSlowCase();
  unsigned LeadZ = countLeadingZerosSlowCase();
  return (Ones + LeadZ + countTrailingZeros()) == BitWidth;
}

/// @}
/// \name Value Generators
/// @{

/// Gets maximum unsigned value of APInt for specific bit width.
static APInt getMaxValue(unsigned numBits) {
  return getAllOnesValue(numBits);
}

/// Gets maximum signed value of APInt for a specific bit width.
static APInt getSignedMaxValue(unsigned numBits) {
  APInt API = getAllOnesValue(numBits);
  API.clearBit(numBits - 1);
  return API;
}

/// Gets minimum unsigned value of APInt for a specific bit width.
static APInt getMinValue(unsigned numBits) { return APInt(numBits, 0); }

/// Gets minimum signed value of APInt for a specific bit width.
static APInt getSignedMinValue(unsigned numBits) {
  APInt API(numBits, 0);
  API.setBit(numBits - 1);
  return API;
}

/// Get the SignMask for a specific bit width.
///
/// This is just a wrapper function of getSignedMinValue(), and it helps code
/// readability when we want to get a SignMask.
static APInt getSignMask(unsigned BitWidth) {
  return getSignedMinValue(BitWidth);
}

/// Get the all-ones value.
///
/// \returns the all-ones value for an APInt of the specified bit-width.
static APInt getAllOnesValue(unsigned numBits) {
  return APInt(numBits, WORDTYPE_MAX, true);
}

/// Get the '0' value.
///
/// \returns the '0' value for an APInt of the specified bit-width.
static APInt getNullValue(unsigned numBits) { return APInt(numBits, 0); }

/// Compute an APInt containing numBits highbits from this APInt.
///
/// Get an APInt with the same BitWidth as this APInt, just zero mask
/// the low bits and right shift to the least significant bit.
///
/// \returns the high "numBits" bits of this APInt.
APInt getHiBits(unsigned numBits) const;

/// Compute an APInt containing numBits lowbits from this APInt.
///
/// Get an APInt with the same BitWidth as this APInt, just zero mask
/// the high bits.
///
/// \returns the low "numBits" bits of this APInt.
APInt getLoBits(unsigned numBits) const;

/// Return an APInt with exactly one bit set in the result.
static APInt getOneBitSet(unsigned numBits, unsigned BitNo) {
  APInt Res(numBits, 0);
  Res.setBit(BitNo);
  return Res;
}

/// Get a value with a block of bits set.
///
/// Constructs an APInt value that has a contiguous range of bits set. The
/// bits from loBit (inclusive) to hiBit (exclusive) will be set. All other
/// bits will be zero. For example, with parameters(32, 0, 16) you would get
/// 0x0000FFFF. Please call getBitsSetWithWrap if \p loBit may be greater than
/// \p hiBit.
///
/// \param numBits the intended bit width of the result
/// \param loBit the index of the lowest bit set.
/// \param hiBit the index of the highest bit set.
///
/// \returns An APInt value with the requested bits set.
static APInt getBitsSet(unsigned numBits, unsigned loBit, unsigned hiBit) {
  assert(loBit <= hiBit && "loBit greater than hiBit")((void)0);
  APInt Res(numBits, 0);
  Res.setBits(loBit, hiBit);
  return Res;
}

/// Wrap version of getBitsSet.
/// If \p hiBit is bigger than \p loBit, this is same with getBitsSet.
/// If \p hiBit is not bigger than \p loBit, the set bits "wrap". For example,
/// with parameters (32, 28, 4), you would get 0xF000000F.
/// If \p hiBit is equal to \p loBit, you would get a result with all bits
/// set.
static APInt getBitsSetWithWrap(unsigned numBits, unsigned loBit,
                                unsigned hiBit) {
  APInt Res(numBits, 0);
  Res.setBitsWithWrap(loBit, hiBit);
  return Res;
}

/// Get a value with upper bits starting at loBit set.
///
/// Constructs an APInt value that has a contiguous range of bits set. The
/// bits from loBit (inclusive) to numBits (exclusive) will be set. All other
/// bits will be zero. For example, with parameters(32, 12) you would get
/// 0xFFFFF000.
///
/// \param numBits the intended bit width of the result
/// \param loBit the index of the lowest bit to set.
///
/// \returns An APInt value with the requested bits set.
static APInt getBitsSetFrom(unsigned numBits, unsigned loBit) {
  APInt Res(numBits, 0);
  Res.setBitsFrom(loBit);
  return Res;
}

/// Get a value with high bits set
///
/// Constructs an APInt value that has the top hiBitsSet bits set.
///
/// \param numBits the bitwidth of the result
/// \param hiBitsSet the number of high-order bits set in the result.
static APInt getHighBitsSet(unsigned numBits, unsigned hiBitsSet) {
  APInt Res(numBits, 0);
  Res.setHighBits(hiBitsSet);
  return Res;
}

/// Get a value with low bits set
///
/// Constructs an APInt value that has the bottom loBitsSet bits set.
///
/// \param numBits the bitwidth of the result
/// \param loBitsSet the number of low-order bits set in the result.
static APInt getLowBitsSet(unsigned numBits, unsigned loBitsSet) {
  APInt Res(numBits, 0);
  Res.setLowBits(loBitsSet);
  return Res;
}

/// Return a value containing V broadcasted over NewLen bits.
static APInt getSplat(unsigned NewLen, const APInt &V);

/// Determine if two APInts have the same value, after zero-extending
/// one of them (if needed!) to ensure that the bit-widths match.
static bool isSameValue(const APInt &I1, const APInt &I2) {
  if (I1.getBitWidth() == I2.getBitWidth())
    return I1 == I2;

  if (I1.getBitWidth() > I2.getBitWidth())
    return I1 == I2.zext(I1.getBitWidth());

  return I1.zext(I2.getBitWidth()) == I2;
}

/// Overload to compute a hash_code for an APInt value.
friend hash_code hash_value(const APInt &Arg);

/// This function returns a pointer to the internal storage of the APInt.
/// This is useful for writing out the APInt in binary form without any
/// conversions.
const uint64_t *getRawData() const {
  if (isSingleWord())
    return &U.VAL;
  return &U.pVal[0];
}

/// @}
/// \name Unary Operators
/// @{

/// Postfix increment operator.
///
/// Increments *this by 1.
///
/// \returns a new APInt value representing the original value of *this.
const APInt operator++(int) {
  APInt API(*this);
  ++(*this);
  return API;
}

/// Prefix increment operator.
///
/// \returns *this incremented by one
APInt &operator++();

/// Postfix decrement operator.
///
/// Decrements *this by 1.
///
/// \returns a new APInt value representing the original value of *this.
const APInt operator--(int) {
  APInt API(*this);
  --(*this);
  return API;
}

/// Prefix decrement operator.
///
/// \returns *this decremented by one.
APInt &operator--();

/// Logical negation operator.
///
/// Performs logical negation operation on this APInt.
///
/// \returns true if *this is zero, false otherwise.
bool operator!() const {
  if (isSingleWord())
16
←
Taking true branch→
    return U.VAL == 0;
17
←
Returning the value 1, which participates in a condition later→
  return countLeadingZerosSlowCase() == BitWidth;
}

/// @}
/// \name Assignment Operators
/// @{

/// Copy assignment operator.
///
/// \returns *this after assignment of RHS.
APInt &operator=(const APInt &RHS) {
  // If the bitwidths are the same, we can avoid mucking with memory
  if (isSingleWord() && RHS.isSingleWord()) {
    U.VAL = RHS.U.VAL;
    BitWidth = RHS.BitWidth;
    return clearUnusedBits();
  }

  AssignSlowCase(RHS);
  return *this;
}

/// Move assignment operator.
APInt &operator=(APInt &&that) {
768#ifdef EXPENSIVE_CHECKS
  // Some std::shuffle implementations still do self-assignment.
  if (this == &that)
    return *this;
772#endif
  assert(this != &that && "Self-move not supported")((void)0);
  if (!isSingleWord())
    delete[] U.pVal;

  // Use memcpy so that type based alias analysis sees both VAL and pVal
  // as modified.
  memcpy(&U, &that.U, sizeof(U));

  BitWidth = that.BitWidth;
  that.BitWidth = 0;

  return *this;
}

/// Assignment operator.
///
/// The RHS value is assigned to *this. If the significant bits in RHS exceed
/// the bit width, the excess bits are truncated. If the bit width is larger
/// than 64, the value is zero filled in the unspecified high order bits.
///
/// \returns *this after assignment of RHS value.
APInt &operator=(uint64_t RHS) {
  if (isSingleWord()) {
    U.VAL = RHS;
    return clearUnusedBits();
  }
  U.pVal[0] = RHS;
  memset(U.pVal + 1, 0, (getNumWords() - 1) * APINT_WORD_SIZE);
  return *this;
}

/// Bitwise AND assignment operator.
///
/// Performs a bitwise AND operation on this APInt and RHS. The result is
/// assigned to *this.
///
/// \returns *this after ANDing with RHS.
APInt &operator&=(const APInt &RHS) {
  assert(BitWidth == RHS.BitWidth && "Bit widths must be the same")((void)0);
  if (isSingleWord())
    U.VAL &= RHS.U.VAL;
  else
    AndAssignSlowCase(RHS);
  return *this;
}

/// Bitwise AND assignment operator.
///
/// Performs a bitwise AND operation on this APInt and RHS. RHS is
/// logically zero-extended or truncated to match the bit-width of
/// the LHS.
APInt &operator&=(uint64_t RHS) {
  if (isSingleWord()) {
    U.VAL &= RHS;
    return *this;
  }
  U.pVal[0] &= RHS;
  memset(U.pVal+1, 0, (getNumWords() - 1) * APINT_WORD_SIZE);
  return *this;
}

/// Bitwise OR assignment operator.
///
/// Performs a bitwise OR operation on this APInt and RHS. The result is
/// assigned *this;
///
/// \returns *this after ORing with RHS.
APInt &operator|=(const APInt &RHS) {
  assert(BitWidth == RHS.BitWidth && "Bit widths must be the same")((void)0);
  if (isSingleWord())
    U.VAL |= RHS.U.VAL;
  else
    OrAssignSlowCase(RHS);
  return *this;
}

/// Bitwise OR assignment operator.
///
/// Performs a bitwise OR operation on this APInt and RHS. RHS is
/// logically zero-extended or truncated to match the bit-width of
/// the LHS.
APInt &operator|=(uint64_t RHS) {
  if (isSingleWord()) {
    U.VAL |= RHS;
    return clearUnusedBits();
  }
  U.pVal[0] |= RHS;
  return *this;
}

/// Bitwise XOR assignment operator.
///
/// Performs a bitwise XOR operation on this APInt and RHS. The result is
/// assigned to *this.
///
/// \returns *this after XORing with RHS.
APInt &operator^=(const APInt &RHS) {
  assert(BitWidth == RHS.BitWidth && "Bit widths must be the same")((void)0);
  if (isSingleWord())
    U.VAL ^= RHS.U.VAL;
  else
    XorAssignSlowCase(RHS);
  return *this;
}

/// Bitwise XOR assignment operator.
///
/// Performs a bitwise XOR operation on this APInt and RHS. RHS is
/// logically zero-extended or truncated to match the bit-width of
/// the LHS.
APInt &operator^=(uint64_t RHS) {
  if (isSingleWord()) {
    U.VAL ^= RHS;
    return clearUnusedBits();
  }
  U.pVal[0] ^= RHS;
  return *this;
}

/// Multiplication assignment operator.
///
/// Multiplies this APInt by RHS and assigns the result to *this.
///
/// \returns *this
APInt &operator*=(const APInt &RHS);
APInt &operator*=(uint64_t RHS);

/// Addition assignment operator.
///
/// Adds RHS to *this and assigns the result to *this.
///
/// \returns *this
APInt &operator+=(const APInt &RHS);
APInt &operator+=(uint64_t RHS);

/// Subtraction assignment operator.
///
/// Subtracts RHS from *this and assigns the result to *this.
///
/// \returns *this
APInt &operator-=(const APInt &RHS);
APInt &operator-=(uint64_t RHS);

/// Left-shift assignment function.
///
/// Shifts *this left by shiftAmt and assigns the result to *this.
///
/// \returns *this after shifting left by ShiftAmt
APInt &operator<<=(unsigned ShiftAmt) {
  assert(ShiftAmt <= BitWidth && "Invalid shift amount")((void)0);
  if (isSingleWord()) {
    if (ShiftAmt == BitWidth)
      U.VAL = 0;
    else
      U.VAL <<= ShiftAmt;
    return clearUnusedBits();
  }
  shlSlowCase(ShiftAmt);
  return *this;
}

/// Left-shift assignment function.
///
/// Shifts *this left by shiftAmt and assigns the result to *this.
///
/// \returns *this after shifting left by ShiftAmt
APInt &operator<<=(const APInt &ShiftAmt);

/// @}
/// \name Binary Operators
/// @{

/// Multiplication operator.
///
/// Multiplies this APInt by RHS and returns the result.
APInt operator*(const APInt &RHS) const;

/// Left logical shift operator.
///
/// Shifts this APInt left by \p Bits and returns the result.
APInt operator<<(unsigned Bits) const { return shl(Bits); }

/// Left logical shift operator.
///
/// Shifts this APInt left by \p Bits and returns the result.
APInt operator<<(const APInt &Bits) const { return shl(Bits); }

/// Arithmetic right-shift function.
///
/// Arithmetic right-shift this APInt by shiftAmt.
APInt ashr(unsigned ShiftAmt) const {
  APInt R(*this);
  R.ashrInPlace(ShiftAmt);
  return R;
}

/// Arithmetic right-shift this APInt by ShiftAmt in place.
void ashrInPlace(unsigned ShiftAmt) {
  assert(ShiftAmt <= BitWidth && "Invalid shift amount")((void)0);
  if (isSingleWord()) {
    int64_t SExtVAL = SignExtend64(U.VAL, BitWidth);
    if (ShiftAmt == BitWidth)
      U.VAL = SExtVAL >> (APINT_BITS_PER_WORD - 1); // Fill with sign bit.
    else
      U.VAL = SExtVAL >> ShiftAmt;
    clearUnusedBits();
    return;
  }
  ashrSlowCase(ShiftAmt);
}

/// Logical right-shift function.
///
/// Logical right-shift this APInt by shiftAmt.
APInt lshr(unsigned shiftAmt) const {
  APInt R(*this);
  R.lshrInPlace(shiftAmt);
  return R;
}

/// Logical right-shift this APInt by ShiftAmt in place.
void lshrInPlace(unsigned ShiftAmt) {
  assert(ShiftAmt <= BitWidth && "Invalid shift amount")((void)0);
  if (isSingleWord()) {
    if (ShiftAmt == BitWidth)
      U.VAL = 0;
    else
      U.VAL >>= ShiftAmt;
    return;
  }
  lshrSlowCase(ShiftAmt);
}

/// Left-shift function.
///
/// Left-shift this APInt by shiftAmt.
APInt shl(unsigned shiftAmt) const {
  APInt R(*this);
  R <<= shiftAmt;
  return R;
}

/// Rotate left by rotateAmt.
APInt rotl(unsigned rotateAmt) const;

/// Rotate right by rotateAmt.
APInt rotr(unsigned rotateAmt) const;

/// Arithmetic right-shift function.
///
/// Arithmetic right-shift this APInt by shiftAmt.
APInt ashr(const APInt &ShiftAmt) const {
  APInt R(*this);
  R.ashrInPlace(ShiftAmt);
  return R;
}

/// Arithmetic right-shift this APInt by shiftAmt in place.
void ashrInPlace(const APInt &shiftAmt);

/// Logical right-shift function.
///
/// Logical right-shift this APInt by shiftAmt.
APInt lshr(const APInt &ShiftAmt) const {
  APInt R(*this);
  R.lshrInPlace(ShiftAmt);
  return R;
}

/// Logical right-shift this APInt by ShiftAmt in place.
void lshrInPlace(const APInt &ShiftAmt);

/// Left-shift function.
///
/// Left-shift this APInt by shiftAmt.
APInt shl(const APInt &ShiftAmt) const {
  APInt R(*this);
  R <<= ShiftAmt;
  return R;
}

/// Rotate left by rotateAmt.
APInt rotl(const APInt &rotateAmt) const;

/// Rotate right by rotateAmt.
APInt rotr(const APInt &rotateAmt) const;

/// Unsigned division operation.
///
/// Perform an unsigned divide operation on this APInt by RHS. Both this and
/// RHS are treated as unsigned quantities for purposes of this division.
///
/// \returns a new APInt value containing the division result, rounded towards
/// zero.
APInt udiv(const APInt &RHS) const;
APInt udiv(uint64_t RHS) const;

/// Signed division function for APInt.
///
/// Signed divide this APInt by APInt RHS.
///
/// The result is rounded towards zero.
APInt sdiv(const APInt &RHS) const;
APInt sdiv(int64_t RHS) const;

/// Unsigned remainder operation.
///
/// Perform an unsigned remainder operation on this APInt with RHS being the
/// divisor. Both this and RHS are treated as unsigned quantities for purposes
/// of this operation. Note that this is a true remainder operation and not a
/// modulo operation because the sign follows the sign of the dividend which
/// is *this.
///
/// \returns a new APInt value containing the remainder result
APInt urem(const APInt &RHS) const;
uint64_t urem(uint64_t RHS) const;

/// Function for signed remainder operation.
///
/// Signed remainder operation on APInt.
APInt srem(const APInt &RHS) const;
int64_t srem(int64_t RHS) const;

/// Dual division/remainder interface.
///
/// Sometimes it is convenient to divide two APInt values and obtain both the
/// quotient and remainder. This function does both operations in the same
/// computation making it a little more efficient. The pair of input arguments
/// may overlap with the pair of output arguments. It is safe to call
/// udivrem(X, Y, X, Y), for example.
static void udivrem(const APInt &LHS, const APInt &RHS, APInt &Quotient,
                    APInt &Remainder);
static void udivrem(const APInt &LHS, uint64_t RHS, APInt &Quotient,
                    uint64_t &Remainder);

static void sdivrem(const APInt &LHS, const APInt &RHS, APInt &Quotient,
                    APInt &Remainder);
static void sdivrem(const APInt &LHS, int64_t RHS, APInt &Quotient,
                    int64_t &Remainder);

// Operations that return overflow indicators.
APInt sadd_ov(const APInt &RHS, bool &Overflow) const;
APInt uadd_ov(const APInt &RHS, bool &Overflow) const;
APInt ssub_ov(const APInt &RHS, bool &Overflow) const;
APInt usub_ov(const APInt &RHS, bool &Overflow) const;
APInt sdiv_ov(const APInt &RHS, bool &Overflow) const;
APInt smul_ov(const APInt &RHS, bool &Overflow) const;
APInt umul_ov(const APInt &RHS, bool &Overflow) const;
APInt sshl_ov(const APInt &Amt, bool &Overflow) const;
APInt ushl_ov(const APInt &Amt, bool &Overflow) const;

// Operations that saturate
APInt sadd_sat(const APInt &RHS) const;
APInt uadd_sat(const APInt &RHS) const;
APInt ssub_sat(const APInt &RHS) const;
APInt usub_sat(const APInt &RHS) const;
APInt smul_sat(const APInt &RHS) const;
APInt umul_sat(const APInt &RHS) const;
APInt sshl_sat(const APInt &RHS) const;
APInt ushl_sat(const APInt &RHS) const;

/// Array-indexing support.
///
/// \returns the bit value at bitPosition
bool operator[](unsigned bitPosition) const {
  assert(bitPosition < getBitWidth() && "Bit position out of bounds!")((void)0);
  return (maskBit(bitPosition) & getWord(bitPosition)) != 0;
}

/// @}
/// \name Comparison Operators
/// @{

/// Equality operator.
///
/// Compares this APInt with RHS for the validity of the equality
/// relationship.
bool operator==(const APInt &RHS) const {
  assert(BitWidth == RHS.BitWidth && "Comparison requires equal bit widths")((void)0);
  if (isSingleWord())
    return U.VAL == RHS.U.VAL;
  return EqualSlowCase(RHS);
}

/// Equality operator.
///
/// Compares this APInt with a uint64_t for the validity of the equality
/// relationship.
///
/// \returns true if *this == Val
bool operator==(uint64_t Val) const {
  return (isSingleWord() || getActiveBits() <= 64) && getZExtValue() == Val;
}

/// Equality comparison.
///
/// Compares this APInt with RHS for the validity of the equality
/// relationship.
///
/// \returns true if *this == Val
bool eq(const APInt &RHS) const { return (*this) == RHS; }

/// Inequality operator.
///
/// Compares this APInt with RHS for the validity of the inequality
/// relationship.
///
/// \returns true if *this != Val
bool operator!=(const APInt &RHS) const { return !((*this) == RHS); }

/// Inequality operator.
///
/// Compares this APInt with a uint64_t for the validity of the inequality
/// relationship.
///
/// \returns true if *this != Val
bool operator!=(uint64_t Val) const { return !((*this) == Val); }

/// Inequality comparison
///
/// Compares this APInt with RHS for the validity of the inequality
/// relationship.
///
/// \returns true if *this != Val
bool ne(const APInt &RHS) const { return !((*this) == RHS); }

/// Unsigned less than comparison
///
/// Regards both *this and RHS as unsigned quantities and compares them for
/// the validity of the less-than relationship.
///
/// \returns true if *this < RHS when both are considered unsigned.
bool ult(const APInt &RHS) const { return compare(RHS) < 0; }

/// Unsigned less than comparison
///
/// Regards both *this as an unsigned quantity and compares it with RHS for
/// the validity of the less-than relationship.
///
/// \returns true if *this < RHS when considered unsigned.
bool ult(uint64_t RHS) const {
  // Only need to check active bits if not a single word.
  return (isSingleWord() || getActiveBits() <= 64) && getZExtValue() < RHS;
}

/// Signed less than comparison
///
/// Regards both *this and RHS as signed quantities and compares them for
/// validity of the less-than relationship.
///
/// \returns true if *this < RHS when both are considered signed.
bool slt(const APInt &RHS) const { return compareSigned(RHS) < 0; }

/// Signed less than comparison
///
/// Regards both *this as a signed quantity and compares it with RHS for
/// the validity of the less-than relationship.
///
/// \returns true if *this < RHS when considered signed.
bool slt(int64_t RHS) const {
  return (!isSingleWord() && getMinSignedBits() > 64) ? isNegative()
                                                      : getSExtValue() < RHS;
}

/// Unsigned less or equal comparison
///
/// Regards both *this and RHS as unsigned quantities and compares them for
/// validity of the less-or-equal relationship.
///
/// \returns true if *this <= RHS when both are considered unsigned.
bool ule(const APInt &RHS) const { return compare(RHS) <= 0; }

/// Unsigned less or equal comparison
///
/// Regards both *this as an unsigned quantity and compares it with RHS for
/// the validity of the less-or-equal relationship.
///
/// \returns true if *this <= RHS when considered unsigned.
bool ule(uint64_t RHS) const { return !ugt(RHS); }

/// Signed less or equal comparison
///
/// Regards both *this and RHS as signed quantities and compares them for
/// validity of the less-or-equal relationship.
///
/// \returns true if *this <= RHS when both are considered signed.
bool sle(const APInt &RHS) const { return compareSigned(RHS) <= 0; }

/// Signed less or equal comparison
///
/// Regards both *this as a signed quantity and compares it with RHS for the
/// validity of the less-or-equal relationship.
///
/// \returns true if *this <= RHS when considered signed.
bool sle(uint64_t RHS) const { return !sgt(RHS); }

/// Unsigned greater than comparison
///
/// Regards both *this and RHS as unsigned quantities and compares them for
/// the validity of the greater-than relationship.
///
/// \returns true if *this > RHS when both are considered unsigned.
bool ugt(const APInt &RHS) const { return !ule(RHS); }

/// Unsigned greater than comparison
///
/// Regards both *this as an unsigned quantity and compares it with RHS for
/// the validity of the greater-than relationship.
///
/// \returns true if *this > RHS when considered unsigned.
bool ugt(uint64_t RHS) const {
  // Only need to check active bits if not a single word.
  return (!isSingleWord() && getActiveBits() > 64) || getZExtValue() > RHS;
}

/// Signed greater than comparison
///
/// Regards both *this and RHS as signed quantities and compares them for the
/// validity of the greater-than relationship.
///
/// \returns true if *this > RHS when both are considered signed.
bool sgt(const APInt &RHS) const { return !sle(RHS); }

/// Signed greater than comparison
///
/// Regards both *this as a signed quantity and compares it with RHS for
/// the validity of the greater-than relationship.
///
/// \returns true if *this > RHS when considered signed.
bool sgt(int64_t RHS) const {
  return (!isSingleWord() && getMinSignedBits() > 64) ? !isNegative()
                                                      : getSExtValue() > RHS;
}

/// Unsigned greater or equal comparison
///
/// Regards both *this and RHS as unsigned quantities and compares them for
/// validity of the greater-or-equal relationship.
///
/// \returns true if *this >= RHS when both are considered unsigned.
bool uge(const APInt &RHS) const { return !ult(RHS); }

/// Unsigned greater or equal comparison
///
/// Regards both *this as an unsigned quantity and compares it with RHS for
/// the validity of the greater-or-equal relationship.
///
/// \returns true if *this >= RHS when considered unsigned.
bool uge(uint64_t RHS) const { return !ult(RHS); }

/// Signed greater or equal comparison
///
/// Regards both *this and RHS as signed quantities and compares them for
/// validity of the greater-or-equal relationship.
///
/// \returns true if *this >= RHS when both are considered signed.
bool sge(const APInt &RHS) const { return !slt(RHS); }

/// Signed greater or equal comparison
///
/// Regards both *this as a signed quantity and compares it with RHS for
/// the validity of the greater-or-equal relationship.
///
/// \returns true if *this >= RHS when considered signed.
bool sge(int64_t RHS) const { return !slt(RHS); }

/// This operation tests if there are any pairs of corresponding bits
/// between this APInt and RHS that are both set.
bool intersects(const APInt &RHS) const {
  assert(BitWidth == RHS.BitWidth && "Bit widths must be the same")((void)0);
  if (isSingleWord())
    return (U.VAL & RHS.U.VAL) != 0;
  return intersectsSlowCase(RHS);
}

/// This operation checks that all bits set in this APInt are also set in RHS.
bool isSubsetOf(const APInt &RHS) const {
  assert(BitWidth == RHS.BitWidth && "Bit widths must be the same")((void)0);
  if (isSingleWord())
    return (U.VAL & ~RHS.U.VAL) == 0;
  return isSubsetOfSlowCase(RHS);
}

/// @}
/// \name Resizing Operators
/// @{

/// Truncate to new width.
///
/// Truncate the APInt to a specified width. It is an error to specify a width
/// that is greater than or equal to the current width.
APInt trunc(unsigned width) const;

/// Truncate to new width with unsigned saturation.
///
/// If the APInt, treated as unsigned integer, can be losslessly truncated to
/// the new bitwidth, then return truncated APInt. Else, return max value.
APInt truncUSat(unsigned width) const;

/// Truncate to new width with signed saturation.
///
/// If this APInt, treated as signed integer, can be losslessly truncated to
/// the new bitwidth, then return truncated APInt. Else, return either
/// signed min value if the APInt was negative, or signed max value.
APInt truncSSat(unsigned width) const;

/// Sign extend to a new width.
///
/// This operation sign extends the APInt to a new width. If the high order
/// bit is set, the fill on the left will be done with 1 bits, otherwise zero.
/// It is an error to specify a width that is less than or equal to the
/// current width.
APInt sext(unsigned width) const;

/// Zero extend to a new width.
///
/// This operation zero extends the APInt to a new width. The high order bits
/// are filled with 0 bits.  It is an error to specify a width that is less
/// than or equal to the current width.
APInt zext(unsigned width) const;

/// Sign extend or truncate to width
///
/// Make this APInt have the bit width given by \p width. The value is sign
/// extended, truncated, or left alone to make it that width.
APInt sextOrTrunc(unsigned width) const;

/// Zero extend or truncate to width
///
/// Make this APInt have the bit width given by \p width. The value is zero
/// extended, truncated, or left alone to make it that width.
APInt zextOrTrunc(unsigned width) const;

/// Truncate to width
///
/// Make this APInt have the bit width given by \p width. The value is
/// truncated or left alone to make it that width.
APInt truncOrSelf(unsigned width) const;

/// Sign extend or truncate to width
///
/// Make this APInt have the bit width given by \p width. The value is sign
/// extended, or left alone to make it that width.
APInt sextOrSelf(unsigned width) const;

/// Zero extend or truncate to width
///
/// Make this APInt have the bit width given by \p width. The value is zero
/// extended, or left alone to make it that width.
APInt zextOrSelf(unsigned width) const;

/// @}
/// \name Bit Manipulation Operators
/// @{

/// Set every bit to 1.
void setAllBits() {
  if (isSingleWord())
    U.VAL = WORDTYPE_MAX;
  else
    // Set all the bits in all the words.
    memset(U.pVal, -1, getNumWords() * APINT_WORD_SIZE);
  // Clear the unused ones
  clearUnusedBits();
}

/// Set a given bit to 1.
///
/// Set the given bit to 1 whose position is given as "bitPosition".
void setBit(unsigned BitPosition) {
  assert(BitPosition < BitWidth && "BitPosition out of range")((void)0);
  WordType Mask = maskBit(BitPosition);
  if (isSingleWord())
    U.VAL |= Mask;
  else
    U.pVal[whichWord(BitPosition)] |= Mask;
}

/// Set the sign bit to 1.
void setSignBit() {
  setBit(BitWidth - 1);
}

/// Set a given bit to a given value.
void setBitVal(unsigned BitPosition, bool BitValue) {
  if (BitValue)
    setBit(BitPosition);
  else
    clearBit(BitPosition);
}

/// Set the bits from loBit (inclusive) to hiBit (exclusive) to 1.
/// This function handles "wrap" case when \p loBit >= \p hiBit, and calls
/// setBits when \p loBit < \p hiBit.
/// For \p loBit == \p hiBit wrap case, set every bit to 1.
void setBitsWithWrap(unsigned loBit, unsigned hiBit) {
  assert(hiBit <= BitWidth && "hiBit out of range")((void)0);
  assert(loBit <= BitWidth && "loBit out of range")((void)0);
  if (loBit < hiBit) {
    setBits(loBit, hiBit);
    return;
  }
  setLowBits(hiBit);
  setHighBits(BitWidth - loBit);
}

/// Set the bits from loBit (inclusive) to hiBit (exclusive) to 1.
/// This function handles case when \p loBit <= \p hiBit.
void setBits(unsigned loBit, unsigned hiBit) {
  assert(hiBit <= BitWidth && "hiBit out of range")((void)0);
  assert(loBit <= BitWidth && "loBit out of range")((void)0);
  assert(loBit <= hiBit && "loBit greater than hiBit")((void)0);
  if (loBit == hiBit)
    return;
  if (loBit < APINT_BITS_PER_WORD && hiBit <= APINT_BITS_PER_WORD) {
    uint64_t mask = WORDTYPE_MAX >> (APINT_BITS_PER_WORD - (hiBit - loBit));
    mask <<= loBit;
    if (isSingleWord())
      U.VAL |= mask;
    else
      U.pVal[0] |= mask;
  } else {
    setBitsSlowCase(loBit, hiBit);
  }
}

/// Set the top bits starting from loBit.
void setBitsFrom(unsigned loBit) {
  return setBits(loBit, BitWidth);
}

/// Set the bottom loBits bits.
void setLowBits(unsigned loBits) {
  return setBits(0, loBits);
}

/// Set the top hiBits bits.
void setHighBits(unsigned hiBits) {
  return setBits(BitWidth - hiBits, BitWidth);
}

/// Set every bit to 0.
void clearAllBits() {
  if (isSingleWord())
    U.VAL = 0;
  else
    memset(U.pVal, 0, getNumWords() * APINT_WORD_SIZE);
}

/// Set a given bit to 0.
///
/// Set the given bit to 0 whose position is given as "bitPosition".
void clearBit(unsigned BitPosition) {
  assert(BitPosition < BitWidth && "BitPosition out of range")((void)0);
  WordType Mask = ~maskBit(BitPosition);
  if (isSingleWord())
    U.VAL &= Mask;
  else
    U.pVal[whichWord(BitPosition)] &= Mask;
}

/// Set bottom loBits bits to 0.
void clearLowBits(unsigned loBits) {
  assert(loBits <= BitWidth && "More bits than bitwidth")((void)0);
  APInt Keep = getHighBitsSet(BitWidth, BitWidth - loBits);
  *this &= Keep;
}

/// Set the sign bit to 0.
void clearSignBit() {
  clearBit(BitWidth - 1);
}

/// Toggle every bit to its opposite value.
void flipAllBits() {
  if (isSingleWord()) {
    U.VAL ^= WORDTYPE_MAX;
    clearUnusedBits();
  } else {
    flipAllBitsSlowCase();
  }
}

/// Toggles a given bit to its opposite value.
///
/// Toggle a given bit to its opposite value whose position is given
/// as "bitPosition".
void flipBit(unsigned bitPosition);

/// Negate this APInt in place.
void negate() {
  flipAllBits();
  ++(*this);
}

/// Insert the bits from a smaller APInt starting at bitPosition.
void insertBits(const APInt &SubBits, unsigned bitPosition);
void insertBits(uint64_t SubBits, unsigned bitPosition, unsigned numBits);

/// Return an APInt with the extracted bits [bitPosition,bitPosition+numBits).
APInt extractBits(unsigned numBits, unsigned bitPosition) const;
uint64_t extractBitsAsZExtValue(unsigned numBits, unsigned bitPosition) const;

/// @}
/// \name Value Characterization Functions
/// @{

/// Return the number of bits in the APInt.
unsigned getBitWidth() const { return BitWidth; }

/// Get the number of words.
///
/// Here one word's bitwidth equals to that of uint64_t.
///
/// \returns the number of words to hold the integer value of this APInt.
unsigned getNumWords() const { return getNumWords(BitWidth); }

/// Get the number of words.
///
/// *NOTE* Here one word's bitwidth equals to that of uint64_t.
///
/// \returns the number of words to hold the integer value with a given bit
/// width.
static unsigned getNumWords(unsigned BitWidth) {
  return ((uint64_t)BitWidth + APINT_BITS_PER_WORD - 1) / APINT_BITS_PER_WORD;
}

/// Compute the number of active bits in the value
///
/// This function returns the number of active bits which is defined as the
/// bit width minus the number of leading zeros. This is used in several
/// computations to see how "wide" the value is.
unsigned getActiveBits() const { return BitWidth - countLeadingZeros(); }

/// Compute the number of active words in the value of this APInt.
///
/// This is used in conjunction with getActiveData to extract the raw value of
/// the APInt.
unsigned getActiveWords() const {
  unsigned numActiveBits = getActiveBits();
  return numActiveBits ? whichWord(numActiveBits - 1) + 1 : 1;
}

/// Get the minimum bit size for this signed APInt
///
/// Computes the minimum bit width for this APInt while considering it to be a
/// signed (and probably negative) value. If the value is not negative, this
/// function returns the same value as getActiveBits()+1. Otherwise, it
/// returns the smallest bit width that will retain the negative value. For
/// example, -1 can be written as 0b1 or 0xFFFFFFFFFF. 0b1 is shorter and so
/// for -1, this function will always return 1.
unsigned getMinSignedBits() const { return BitWidth - getNumSignBits() + 1; }

/// Get zero extended value
///
/// This method attempts to return the value of this APInt as a zero extended
/// uint64_t. The bitwidth must be <= 64 or the value must fit within a
/// uint64_t. Otherwise an assertion will result.
uint64_t getZExtValue() const {
  if (isSingleWord())
    return U.VAL;
  assert(getActiveBits() <= 64 && "Too many bits for uint64_t")((void)0);
  return U.pVal[0];
}

/// Get sign extended value
///
/// This method attempts to return the value of this APInt as a sign extended
/// int64_t. The bit width must be <= 64 or the value must fit within an
/// int64_t. Otherwise an assertion will result.
int64_t getSExtValue() const {
  if (isSingleWord())
    return SignExtend64(U.VAL, BitWidth);
  assert(getMinSignedBits() <= 64 && "Too many bits for int64_t")((void)0);
  return int64_t(U.pVal[0]);
}

/// Get bits required for string value.
///
/// This method determines how many bits are required to hold the APInt
/// equivalent of the string given by \p str.
static unsigned getBitsNeeded(StringRef str, uint8_t radix);

/// The APInt version of the countLeadingZeros functions in
///   MathExtras.h.
///
/// It counts the number of zeros from the most significant bit to the first
/// one bit.
///
/// \returns BitWidth if the value is zero, otherwise returns the number of
///   zeros from the most significant bit to the first one bits.
unsigned countLeadingZeros() const {
  if (isSingleWord()) {
    unsigned unusedBits = APINT_BITS_PER_WORD - BitWidth;
    return llvm::countLeadingZeros(U.VAL) - unusedBits;
  }
  return countLeadingZerosSlowCase();
}

/// Count the number of leading one bits.
///
/// This function is an APInt version of the countLeadingOnes
/// functions in MathExtras.h. It counts the number of ones from the most
/// significant bit to the first zero bit.
///
/// \returns 0 if the high order bit is not set, otherwise returns the number
/// of 1 bits from the most significant to the least
unsigned countLeadingOnes() const {
  if (isSingleWord())
    return llvm::countLeadingOnes(U.VAL << (APINT_BITS_PER_WORD - BitWidth));
  return countLeadingOnesSlowCase();
}

/// Computes the number of leading bits of this APInt that are equal to its
/// sign bit.
unsigned getNumSignBits() const {
  return isNegative() ? countLeadingOnes() : countLeadingZeros();
}

/// Count the number of trailing zero bits.
///
/// This function is an APInt version of the countTrailingZeros
/// functions in MathExtras.h. It counts the number of zeros from the least
/// significant bit to the first set bit.
///
/// \returns BitWidth if the value is zero, otherwise returns the number of
/// zeros from the least significant bit to the first one bit.
unsigned countTrailingZeros() const {
  if (isSingleWord()) {
    unsigned TrailingZeros = llvm::countTrailingZeros(U.VAL);
    return (TrailingZeros > BitWidth ? BitWidth : TrailingZeros);
  }
  return countTrailingZerosSlowCase();
}

/// Count the number of trailing one bits.
///
/// This function is an APInt version of the countTrailingOnes
/// functions in MathExtras.h. It counts the number of ones from the least
/// significant bit to the first zero bit.
///
/// \returns BitWidth if the value is all ones, otherwise returns the number
/// of ones from the least significant bit to the first zero bit.
unsigned countTrailingOnes() const {
  if (isSingleWord())
    return llvm::countTrailingOnes(U.VAL);
  return countTrailingOnesSlowCase();
}

/// Count the number of bits set.
///
/// This function is an APInt version of the countPopulation functions
/// in MathExtras.h. It counts the number of 1 bits in the APInt value.
///
/// \returns 0 if the value is zero, otherwise returns the number of set bits.
unsigned countPopulation() const {
  if (isSingleWord())
    return llvm::countPopulation(U.VAL);
  return countPopulationSlowCase();
}

/// @}
/// \name Conversion Functions
/// @{
void print(raw_ostream &OS, bool isSigned) const;

/// Converts an APInt to a string and append it to Str.  Str is commonly a
/// SmallString.
void toString(SmallVectorImpl<char> &Str, unsigned Radix, bool Signed,
              bool formatAsCLiteral = false) const;

/// Considers the APInt to be unsigned and converts it into a string in the
/// radix given. The radix can be 2, 8, 10 16, or 36.
void toStringUnsigned(SmallVectorImpl<char> &Str, unsigned Radix = 10) const {
  toString(Str, Radix, false, false);
}

/// Considers the APInt to be signed and converts it into a string in the
/// radix given. The radix can be 2, 8, 10, 16, or 36.
void toStringSigned(SmallVectorImpl<char> &Str, unsigned Radix = 10) const {
  toString(Str, Radix, true, false);
}

/// \returns a byte-swapped representation of this APInt Value.
APInt byteSwap() const;

/// \returns the value with the bit representation reversed of this APInt
/// Value.
APInt reverseBits() const;

/// Converts this APInt to a double value.
double roundToDouble(bool isSigned) const;

/// Converts this unsigned APInt to a double value.
double roundToDouble() const { return roundToDouble(false); }

/// Converts this signed APInt to a double value.
double signedRoundToDouble() const { return roundToDouble(true); }

/// Converts APInt bits to a double
///
/// The conversion does not do a translation from integer to double, it just
/// re-interprets the bits as a double. Note that it is valid to do this on
/// any bit width. Exactly 64 bits will be translated.
double bitsToDouble() const {
  return BitsToDouble(getWord(0));
}

/// Converts APInt bits to a float
///
/// The conversion does not do a translation from integer to float, it just
/// re-interprets the bits as a float. Note that it is valid to do this on
/// any bit width. Exactly 32 bits will be translated.
float bitsToFloat() const {
  return BitsToFloat(static_cast<uint32_t>(getWord(0)));
}

/// Converts a double to APInt bits.
///
/// The conversion does not do a translation from double to integer, it just
/// re-interprets the bits of the double.
static APInt doubleToBits(double V) {
  return APInt(sizeof(double) * CHAR_BIT8, DoubleToBits(V));
}

/// Converts a float to APInt bits.
///
/// The conversion does not do a translation from float to integer, it just
/// re-interprets the bits of the float.
static APInt floatToBits(float V) {
  return APInt(sizeof(float) * CHAR_BIT8, FloatToBits(V));
}

/// @}
/// \name Mathematics Operations
/// @{

/// \returns the floor log base 2 of this APInt.
unsigned logBase2() const { return getActiveBits() -  1; }

/// \returns the ceil log base 2 of this APInt.
unsigned ceilLogBase2() const {
  APInt temp(*this);
  --temp;
  return temp.getActiveBits();
}

/// \returns the nearest log base 2 of this APInt. Ties round up.
///
/// NOTE: When we have a BitWidth of 1, we define:
///
///   log2(0) = UINT32_MAX
///   log2(1) = 0
///
/// to get around any mathematical concerns resulting from
/// referencing 2 in a space where 2 does no exist.
unsigned nearestLogBase2() const {
  // Special case when we have a bitwidth of 1. If VAL is 1, then we
  // get 0. If VAL is 0, we get WORDTYPE_MAX which gets truncated to
  // UINT32_MAX.
  if (BitWidth == 1)
    return U.VAL - 1;

  // Handle the zero case.
  if (isNullValue())
    return UINT32_MAX0xffffffffU;

  // The non-zero case is handled by computing:
  //
  //   nearestLogBase2(x) = logBase2(x) + x[logBase2(x)-1].
  //
  // where x[i] is referring to the value of the ith bit of x.
  unsigned lg = logBase2();
  return lg + unsigned((*this)[lg - 1]);
}

/// \returns the log base 2 of this APInt if its an exact power of two, -1
/// otherwise
int32_t exactLogBase2() const {
  if (!isPowerOf2())
    return -1;
  return logBase2();
}

/// Compute the square root
APInt sqrt() const;

/// Get the absolute value;
///
/// If *this is < 0 then return -(*this), otherwise *this;
APInt abs() const {
  if (isNegative())
    return -(*this);
  return *this;
}

/// \returns the multiplicative inverse for a given modulo.
APInt multiplicativeInverse(const APInt &modulo) const;

/// @}
/// \name Support for division by constant
/// @{

/// Calculate the magic number for signed division by a constant.
struct ms;
ms magic() const;

/// Calculate the magic number for unsigned division by a constant.
struct mu;
mu magicu(unsigned LeadingZeros = 0) const;

/// @}
/// \name Building-block Operations for APInt and APFloat
/// @{

// These building block operations operate on a representation of arbitrary
// precision, two's-complement, bignum integer values. They should be
// sufficient to implement APInt and APFloat bignum requirements. Inputs are
// generally a pointer to the base of an array of integer parts, representing
// an unsigned bignum, and a count of how many parts there are.

/// Sets the least significant part of a bignum to the input value, and zeroes
/// out higher parts.
static void tcSet(WordType *, WordType, unsigned);

/// Assign one bignum to another.
static void tcAssign(WordType *, const WordType *, unsigned);

/// Returns true if a bignum is zero, false otherwise.
static bool tcIsZero(const WordType *, unsigned);

/// Extract the given bit of a bignum; returns 0 or 1.  Zero-based.
static int tcExtractBit(const WordType *, unsigned bit);

/// Copy the bit vector of width srcBITS from SRC, starting at bit srcLSB, to
/// DST, of dstCOUNT parts, such that the bit srcLSB becomes the least
/// significant bit of DST.  All high bits above srcBITS in DST are
/// zero-filled.
static void tcExtract(WordType *, unsigned dstCount,
                      const WordType *, unsigned srcBits,
                      unsigned srcLSB);

/// Set the given bit of a bignum.  Zero-based.
static void tcSetBit(WordType *, unsigned bit);

/// Clear the given bit of a bignum.  Zero-based.
static void tcClearBit(WordType *, unsigned bit);

/// Returns the bit number of the least or most significant set bit of a
/// number.  If the input number has no bits set -1U is returned.
static unsigned tcLSB(const WordType *, unsigned n);
static unsigned tcMSB(const WordType *parts, unsigned n);

/// Negate a bignum in-place.
static void tcNegate(WordType *, unsigned);

/// DST += RHS + CARRY where CARRY is zero or one.  Returns the carry flag.
static WordType tcAdd(WordType *, const WordType *,
                      WordType carry, unsigned);
/// DST += RHS.  Returns the carry flag.
static WordType tcAddPart(WordType *, WordType, unsigned);

/// DST -= RHS + CARRY where CARRY is zero or one. Returns the carry flag.
static WordType tcSubtract(WordType *, const WordType *,
                           WordType carry, unsigned);
/// DST -= RHS.  Returns the carry flag.
static WordType tcSubtractPart(WordType *, WordType, unsigned);

/// DST += SRC * MULTIPLIER + PART   if add is true
/// DST  = SRC * MULTIPLIER + PART   if add is false
///
/// Requires 0 <= DSTPARTS <= SRCPARTS + 1.  If DST overlaps SRC they must
/// start at the same point, i.e. DST == SRC.
///
/// If DSTPARTS == SRC_PARTS + 1 no overflow occurs and zero is returned.
/// Otherwise DST is filled with the least significant DSTPARTS parts of the
/// result, and if all of the omitted higher parts were zero return zero,
/// otherwise overflow occurred and return one.
static int tcMultiplyPart(WordType *dst, const WordType *src,
                          WordType multiplier, WordType carry,
                          unsigned srcParts, unsigned dstParts,
                          bool add);

/// DST = LHS * RHS, where DST has the same width as the operands and is
/// filled with the least significant parts of the result.  Returns one if
/// overflow occurred, otherwise zero.  DST must be disjoint from both
/// operands.
static int tcMultiply(WordType *, const WordType *, const WordType *,
                      unsigned);

/// DST = LHS * RHS, where DST has width the sum of the widths of the
/// operands. No overflow occurs. DST must be disjoint from both operands.
static void tcFullMultiply(WordType *, const WordType *,
                           const WordType *, unsigned, unsigned);

/// If RHS is zero LHS and REMAINDER are left unchanged, return one.
/// Otherwise set LHS to LHS / RHS with the fractional part discarded, set
/// REMAINDER to the remainder, return zero.  i.e.
///
///  OLD_LHS = RHS * LHS + REMAINDER
///
/// SCRATCH is a bignum of the same size as the operands and result for use by
/// the routine; its contents need not be initialized and are destroyed.  LHS,
/// REMAINDER and SCRATCH must be distinct.
static int tcDivide(WordType *lhs, const WordType *rhs,
                    WordType *remainder, WordType *scratch,
                    unsigned parts);

/// Shift a bignum left Count bits. Shifted in bits are zero. There are no
/// restrictions on Count.
static void tcShiftLeft(WordType *, unsigned Words, unsigned Count);

/// Shift a bignum right Count bits.  Shifted in bits are zero.  There are no
/// restrictions on Count.
static void tcShiftRight(WordType *, unsigned Words, unsigned Count);

/// The obvious AND, OR and XOR and complement operations.
static void tcAnd(WordType *, const WordType *, unsigned);
static void tcOr(WordType *, const WordType *, unsigned);
static void tcXor(WordType *, const WordType *, unsigned);
static void tcComplement(WordType *, unsigned);

/// Comparison (unsigned) of two bignums.
static int tcCompare(const WordType *, const WordType *, unsigned);

/// Increment a bignum in-place.  Return the carry flag.
static WordType tcIncrement(WordType *dst, unsigned parts) {
  return tcAddPart(dst, 1, parts);
}

/// Decrement a bignum in-place.  Return the borrow flag.
static WordType tcDecrement(WordType *dst, unsigned parts) {
  return tcSubtractPart(dst, 1, parts);
}

/// Set the least significant BITS and clear the rest.
static void tcSetLeastSignificantBits(WordType *, unsigned, unsigned bits);

/// debug method
void dump() const;

/// @}
2015};

2017/// Magic data for optimising signed division by a constant.
2018struct APInt::ms {
APInt m;    ///< magic number
unsigned s; ///< shift amount
2021};

2023/// Magic data for optimising unsigned division by a constant.
2024struct APInt::mu {
APInt m;    ///< magic number
bool a;     ///< add indicator
unsigned s; ///< shift amount
2028};

2030inline bool operator==(uint64_t V1, const APInt &V2) { return V2 == V1; }

2032inline bool operator!=(uint64_t V1, const APInt &V2) { return V2 != V1; }

2034/// Unary bitwise complement operator.
2035///
2036/// \returns an APInt that is the bitwise complement of \p v.
2037inline APInt operator~(APInt v) {
v.flipAllBits();
return v;
2040}

2042inline APInt operator&(APInt a, const APInt &b) {
a &= b;
return a;
2045}

2047inline APInt operator&(const APInt &a, APInt &&b) {
b &= a;
return std::move(b);
2050}

2052inline APInt operator&(APInt a, uint64_t RHS) {
a &= RHS;
return a;
2055}

2057inline APInt operator&(uint64_t LHS, APInt b) {
b &= LHS;
return b;
2060}

2062inline APInt operator|(APInt a, const APInt &b) {
a |= b;
return a;
2065}

2067inline APInt operator|(const APInt &a, APInt &&b) {
b |= a;
return std::move(b);
2070}

2072inline APInt operator|(APInt a, uint64_t RHS) {
a |= RHS;
return a;
2075}

2077inline APInt operator|(uint64_t LHS, APInt b) {
b |= LHS;
return b;
2080}

2082inline APInt operator^(APInt a, const APInt &b) {
a ^= b;
return a;
2085}

2087inline APInt operator^(const APInt &a, APInt &&b) {
b ^= a;
return std::move(b);
2090}

2092inline APInt operator^(APInt a, uint64_t RHS) {
a ^= RHS;
return a;
2095}

2097inline APInt operator^(uint64_t LHS, APInt b) {
b ^= LHS;
return b;
2100}

2102inline raw_ostream &operator<<(raw_ostream &OS, const APInt &I) {
I.print(OS, true);
return OS;
2105}

2107inline APInt operator-(APInt v) {
v.negate();
return v;
2110}

2112inline APInt operator+(APInt a, const APInt &b) {
a += b;
return a;
2115}

2117inline APInt operator+(const APInt &a, APInt &&b) {
b += a;
return std::move(b);
2120}

2122inline APInt operator+(APInt a, uint64_t RHS) {
a += RHS;
return a;
2125}

2127inline APInt operator+(uint64_t LHS, APInt b) {
b += LHS;
return b;
2130}

2132inline APInt operator-(APInt a, const APInt &b) {
a -= b;
return a;
2135}

2137inline APInt operator-(const APInt &a, APInt &&b) {
b.negate();
b += a;
return std::move(b);
2141}

2143inline APInt operator-(APInt a, uint64_t RHS) {
a -= RHS;
return a;
2146}

2148inline APInt operator-(uint64_t LHS, APInt b) {
b.negate();
b += LHS;
return b;
2152}

2154inline APInt operator*(APInt a, uint64_t RHS) {
a *= RHS;
return a;
2157}

2159inline APInt operator*(uint64_t LHS, APInt b) {
b *= LHS;
return b;
2162}


2165namespace APIntOps {

2167/// Determine the smaller of two APInts considered to be signed.
2168inline const APInt &smin(const APInt &A, const APInt &B) {
return A.slt(B) ? A : B;
2170}

2172/// Determine the larger of two APInts considered to be signed.
2173inline const APInt &smax(const APInt &A, const APInt &B) {
return A.sgt(B) ? A : B;
2175}

2177/// Determine the smaller of two APInts considered to be unsigned.
2178inline const APInt &umin(const APInt &A, const APInt &B) {
return A.ult(B) ? A : B;
2180}

2182/// Determine the larger of two APInts considered to be unsigned.
2183inline const APInt &umax(const APInt &A, const APInt &B) {
return A.ugt(B) ? A : B;
2185}

2187/// Compute GCD of two unsigned APInt values.
2188///
2189/// This function returns the greatest common divisor of the two APInt values
2190/// using Stein's algorithm.
2191///
2192/// \returns the greatest common divisor of A and B.
2193APInt GreatestCommonDivisor(APInt A, APInt B);

2195/// Converts the given APInt to a double value.
2196///
2197/// Treats the APInt as an unsigned value for conversion purposes.
2198inline double RoundAPIntToDouble(const APInt &APIVal) {
return APIVal.roundToDouble();
2200}

2202/// Converts the given APInt to a double value.
2203///
2204/// Treats the APInt as a signed value for conversion purposes.
2205inline double RoundSignedAPIntToDouble(const APInt &APIVal) {
return APIVal.signedRoundToDouble();
2207}

2209/// Converts the given APInt to a float value.
2210inline float RoundAPIntToFloat(const APInt &APIVal) {
return float(RoundAPIntToDouble(APIVal));
2212}

2214/// Converts the given APInt to a float value.
2215///
2216/// Treats the APInt as a signed value for conversion purposes.
2217inline float RoundSignedAPIntToFloat(const APInt &APIVal) {
return float(APIVal.signedRoundToDouble());
2219}

2221/// Converts the given double value into a APInt.
2222///
2223/// This function convert a double value to an APInt value.
2224APInt RoundDoubleToAPInt(double Double, unsigned width);

2226/// Converts a float value into a APInt.
2227///
2228/// Converts a float value into an APInt value.
2229inline APInt RoundFloatToAPInt(float Float, unsigned width) {
return RoundDoubleToAPInt(double(Float), width);
2231}

2233/// Return A unsign-divided by B, rounded by the given rounding mode.
2234APInt RoundingUDiv(const APInt &A, const APInt &B, APInt::Rounding RM);

2236/// Return A sign-divided by B, rounded by the given rounding mode.
2237APInt RoundingSDiv(const APInt &A, const APInt &B, APInt::Rounding RM);

2239/// Let q(n) = An^2 + Bn + C, and BW = bit width of the value range
2240/// (e.g. 32 for i32).
2241/// This function finds the smallest number n, such that
2242/// (a) n >= 0 and q(n) = 0, or
2243/// (b) n >= 1 and q(n-1) and q(n), when evaluated in the set of all
2244///     integers, belong to two different intervals [Rk, Rk+R),
2245///     where R = 2^BW, and k is an integer.
2246/// The idea here is to find when q(n) "overflows" 2^BW, while at the
2247/// same time "allowing" subtraction. In unsigned modulo arithmetic a
2248/// subtraction (treated as addition of negated numbers) would always
2249/// count as an overflow, but here we want to allow values to decrease
2250/// and increase as long as they are within the same interval.
2251/// Specifically, adding of two negative numbers should not cause an
2252/// overflow (as long as the magnitude does not exceed the bit width).
2253/// On the other hand, given a positive number, adding a negative
2254/// number to it can give a negative result, which would cause the
2255/// value to go from [-2^BW, 0) to [0, 2^BW). In that sense, zero is
2256/// treated as a special case of an overflow.
2257///
2258/// This function returns None if after finding k that minimizes the
2259/// positive solution to q(n) = kR, both solutions are contained between
2260/// two consecutive integers.
2261///
2262/// There are cases where q(n) > T, and q(n+1) < T (assuming evaluation
2263/// in arithmetic modulo 2^BW, and treating the values as signed) by the
2264/// virtue of *signed* overflow. This function will *not* find such an n,
2265/// however it may find a value of n satisfying the inequalities due to
2266/// an *unsigned* overflow (if the values are treated as unsigned).
2267/// To find a solution for a signed overflow, treat it as a problem of
2268/// finding an unsigned overflow with a range with of BW-1.
2269///
2270/// The returned value may have a different bit width from the input
2271/// coefficients.
2272Optional<APInt> SolveQuadraticEquationWrap(APInt A, APInt B, APInt C,
                                         unsigned RangeWidth);

2275/// Compare two values, and if they are different, return the position of the
2276/// most significant bit that is different in the values.
2277Optional<unsigned> GetMostSignificantDifferentBit(const APInt &A,
                                                const APInt &B);

2280} // End of APIntOps namespace

2282// See friend declaration above. This additional declaration is required in
2283// order to compile LLVM with IBM xlC compiler.
2284hash_code hash_value(const APInt &Arg);

2286/// StoreIntToMemory - Fills the StoreBytes bytes of memory starting from Dst
2287/// with the integer held in IntVal.
2288void StoreIntToMemory(const APInt &IntVal, uint8_t *Dst, unsigned StoreBytes);

2290/// LoadIntFromMemory - Loads the integer stored in the LoadBytes bytes starting
2291/// from Src into IntVal, which is assumed to be wide enough and to hold zero.
2292void LoadIntFromMemory(APInt &IntVal, const uint8_t *Src, unsigned LoadBytes);

2294/// Provide DenseMapInfo for APInt.
2295template <> struct DenseMapInfo<APInt> {
static inline APInt getEmptyKey() {
  APInt V(nullptr, 0);
  V.U.VAL = 0;
  return V;
}

static inline APInt getTombstoneKey() {
  APInt V(nullptr, 0);
  V.U.VAL = 1;
  return V;
}

static unsigned getHashValue(const APInt &Key);

static bool isEqual(const APInt &LHS, const APInt &RHS) {
  return LHS.getBitWidth() == RHS.getBitWidth() && LHS == RHS;
}
2313};

2315} // namespace llvm

2317#endif

←

/usr/src/gnu/usr.bin/clang/libclangCodeGen/../../../llvm/clang/include/clang/AST/Type.h

→

1//===- Type.h - C Language Family Type Representation -----------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9/// \file
10/// C Language Family Type Representation
11///
12/// This file defines the clang::Type interface and subclasses, used to
13/// represent types for languages in the C family.
14//
15//===----------------------------------------------------------------------===//

17#ifndef LLVM_CLANG_AST_TYPE_H
18#define LLVM_CLANG_AST_TYPE_H

20#include "clang/AST/DependenceFlags.h"
21#include "clang/AST/NestedNameSpecifier.h"
22#include "clang/AST/TemplateName.h"
23#include "clang/Basic/AddressSpaces.h"
24#include "clang/Basic/AttrKinds.h"
25#include "clang/Basic/Diagnostic.h"
26#include "clang/Basic/ExceptionSpecificationType.h"
27#include "clang/Basic/LLVM.h"
28#include "clang/Basic/Linkage.h"
29#include "clang/Basic/PartialDiagnostic.h"
30#include "clang/Basic/SourceLocation.h"
31#include "clang/Basic/Specifiers.h"
32#include "clang/Basic/Visibility.h"
33#include "llvm/ADT/APInt.h"
34#include "llvm/ADT/APSInt.h"
35#include "llvm/ADT/ArrayRef.h"
36#include "llvm/ADT/FoldingSet.h"
37#include "llvm/ADT/None.h"
38#include "llvm/ADT/Optional.h"
39#include "llvm/ADT/PointerIntPair.h"
40#include "llvm/ADT/PointerUnion.h"
41#include "llvm/ADT/StringRef.h"
42#include "llvm/ADT/Twine.h"
43#include "llvm/ADT/iterator_range.h"
44#include "llvm/Support/Casting.h"
45#include "llvm/Support/Compiler.h"
46#include "llvm/Support/ErrorHandling.h"
47#include "llvm/Support/PointerLikeTypeTraits.h"
48#include "llvm/Support/TrailingObjects.h"
49#include "llvm/Support/type_traits.h"
50#include <cassert>
51#include <cstddef>
52#include <cstdint>
53#include <cstring>
54#include <string>
55#include <type_traits>
56#include <utility>

58namespace clang {

60class ExtQuals;
61class QualType;
62class ConceptDecl;
63class TagDecl;
64class TemplateParameterList;
65class Type;

67enum {
TypeAlignmentInBits = 4,
TypeAlignment = 1 << TypeAlignmentInBits
70};

72namespace serialization {
template <class T> class AbstractTypeReader;
template <class T> class AbstractTypeWriter;
75}

77} // namespace clang

79namespace llvm {

template <typename T>
struct PointerLikeTypeTraits;
template<>
struct PointerLikeTypeTraits< ::clang::Type*> {
  static inline void *getAsVoidPointer(::clang::Type *P) { return P; }

  static inline ::clang::Type *getFromVoidPointer(void *P) {
    return static_cast< ::clang::Type*>(P);
  }

  static constexpr int NumLowBitsAvailable = clang::TypeAlignmentInBits;
};

template<>
struct PointerLikeTypeTraits< ::clang::ExtQuals*> {
  static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; }

  static inline ::clang::ExtQuals *getFromVoidPointer(void *P) {
    return static_cast< ::clang::ExtQuals*>(P);
  }

  static constexpr int NumLowBitsAvailable = clang::TypeAlignmentInBits;
};

105} // namespace llvm

107namespace clang {

109class ASTContext;
110template <typename> class CanQual;
111class CXXRecordDecl;
112class DeclContext;
113class EnumDecl;
114class Expr;
115class ExtQualsTypeCommonBase;
116class FunctionDecl;
117class IdentifierInfo;
118class NamedDecl;
119class ObjCInterfaceDecl;
120class ObjCProtocolDecl;
121class ObjCTypeParamDecl;
122struct PrintingPolicy;
123class RecordDecl;
124class Stmt;
125class TagDecl;
126class TemplateArgument;
127class TemplateArgumentListInfo;
128class TemplateArgumentLoc;
129class TemplateTypeParmDecl;
130class TypedefNameDecl;
131class UnresolvedUsingTypenameDecl;

133using CanQualType = CanQual<Type>;

135// Provide forward declarations for all of the *Type classes.
136#define TYPE(Class, Base) class Class##Type;
137#include "clang/AST/TypeNodes.inc"

139/// The collection of all-type qualifiers we support.
140/// Clang supports five independent qualifiers:
141/// * C99: const, volatile, and restrict
142/// * MS: __unaligned
143/// * Embedded C (TR18037): address spaces
144/// * Objective C: the GC attributes (none, weak, or strong)
145class Qualifiers {
146public:
enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ.
  Const    = 0x1,
  Restrict = 0x2,
  Volatile = 0x4,
  CVRMask = Const | Volatile | Restrict
};

enum GC {
  GCNone = 0,
  Weak,
  Strong
};

enum ObjCLifetime {
  /// There is no lifetime qualification on this type.
  OCL_None,

  /// This object can be modified without requiring retains or
  /// releases.
  OCL_ExplicitNone,

  /// Assigning into this object requires the old value to be
  /// released and the new value to be retained.  The timing of the
  /// release of the old value is inexact: it may be moved to
  /// immediately after the last known point where the value is
  /// live.
  OCL_Strong,

  /// Reading or writing from this object requires a barrier call.
  OCL_Weak,

  /// Assigning into this object requires a lifetime extension.
  OCL_Autoreleasing
};

enum {
  /// The maximum supported address space number.
  /// 23 bits should be enough for anyone.
  MaxAddressSpace = 0x7fffffu,

  /// The width of the "fast" qualifier mask.
  FastWidth = 3,

  /// The fast qualifier mask.
  FastMask = (1 << FastWidth) - 1
};

/// Returns the common set of qualifiers while removing them from
/// the given sets.
static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R) {
  // If both are only CVR-qualified, bit operations are sufficient.
  if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) {
    Qualifiers Q;
    Q.Mask = L.Mask & R.Mask;
    L.Mask &= ~Q.Mask;
    R.Mask &= ~Q.Mask;
    return Q;
  }

  Qualifiers Q;
  unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers();
  Q.addCVRQualifiers(CommonCRV);
  L.removeCVRQualifiers(CommonCRV);
  R.removeCVRQualifiers(CommonCRV);

  if (L.getObjCGCAttr() == R.getObjCGCAttr()) {
    Q.setObjCGCAttr(L.getObjCGCAttr());
    L.removeObjCGCAttr();
    R.removeObjCGCAttr();
  }

  if (L.getObjCLifetime() == R.getObjCLifetime()) {
    Q.setObjCLifetime(L.getObjCLifetime());
    L.removeObjCLifetime();
    R.removeObjCLifetime();
  }

  if (L.getAddressSpace() == R.getAddressSpace()) {
    Q.setAddressSpace(L.getAddressSpace());
    L.removeAddressSpace();
    R.removeAddressSpace();
  }
  return Q;
}

static Qualifiers fromFastMask(unsigned Mask) {
  Qualifiers Qs;
  Qs.addFastQualifiers(Mask);
  return Qs;
}

static Qualifiers fromCVRMask(unsigned CVR) {
  Qualifiers Qs;
  Qs.addCVRQualifiers(CVR);
  return Qs;
}

static Qualifiers fromCVRUMask(unsigned CVRU) {
  Qualifiers Qs;
  Qs.addCVRUQualifiers(CVRU);
  return Qs;
}

// Deserialize qualifiers from an opaque representation.
static Qualifiers fromOpaqueValue(unsigned opaque) {
  Qualifiers Qs;
  Qs.Mask = opaque;
  return Qs;
}

// Serialize these qualifiers into an opaque representation.
unsigned getAsOpaqueValue() const {
  return Mask;
}

bool hasConst() const { return Mask & Const; }
bool hasOnlyConst() const { return Mask == Const; }
void removeConst() { Mask &= ~Const; }
void addConst() { Mask |= Const; }

bool hasVolatile() const { return Mask & Volatile; }
bool hasOnlyVolatile() const { return Mask == Volatile; }
void removeVolatile() { Mask &= ~Volatile; }
void addVolatile() { Mask |= Volatile; }

bool hasRestrict() const { return Mask & Restrict; }
bool hasOnlyRestrict() const { return Mask == Restrict; }
void removeRestrict() { Mask &= ~Restrict; }
void addRestrict() { Mask |= Restrict; }

bool hasCVRQualifiers() const { return getCVRQualifiers(); }
unsigned getCVRQualifiers() const { return Mask & CVRMask; }
unsigned getCVRUQualifiers() const { return Mask & (CVRMask | UMask); }

void setCVRQualifiers(unsigned mask) {
  assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((void)0);
  Mask = (Mask & ~CVRMask) | mask;
}
void removeCVRQualifiers(unsigned mask) {
  assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((void)0);
  Mask &= ~mask;
}
void removeCVRQualifiers() {
  removeCVRQualifiers(CVRMask);
}
void addCVRQualifiers(unsigned mask) {
  assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((void)0);
  Mask |= mask;
}
void addCVRUQualifiers(unsigned mask) {
  assert(!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits")((void)0);
  Mask |= mask;
}

bool hasUnaligned() const { return Mask & UMask; }
void setUnaligned(bool flag) {
  Mask = (Mask & ~UMask) | (flag ? UMask : 0);
}
void removeUnaligned() { Mask &= ~UMask; }
void addUnaligned() { Mask |= UMask; }

bool hasObjCGCAttr() const { return Mask & GCAttrMask; }
GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); }
void setObjCGCAttr(GC type) {
  Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift);
}
void removeObjCGCAttr() { setObjCGCAttr(GCNone); }
void addObjCGCAttr(GC type) {
  assert(type)((void)0);
  setObjCGCAttr(type);
}
Qualifiers withoutObjCGCAttr() const {
  Qualifiers qs = *this;
  qs.removeObjCGCAttr();
  return qs;
}
Qualifiers withoutObjCLifetime() const {
  Qualifiers qs = *this;
  qs.removeObjCLifetime();
  return qs;
}
Qualifiers withoutAddressSpace() const {
  Qualifiers qs = *this;
  qs.removeAddressSpace();
  return qs;
}

bool hasObjCLifetime() const { return Mask & LifetimeMask; }
ObjCLifetime getObjCLifetime() const {
  return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift);
}
void setObjCLifetime(ObjCLifetime type) {
  Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift);
}
void removeObjCLifetime() { setObjCLifetime(OCL_None); }
void addObjCLifetime(ObjCLifetime type) {
  assert(type)((void)0);
  assert(!hasObjCLifetime())((void)0);
  Mask |= (type << LifetimeShift);
}

/// True if the lifetime is neither None or ExplicitNone.
bool hasNonTrivialObjCLifetime() const {
  ObjCLifetime lifetime = getObjCLifetime();
  return (lifetime > OCL_ExplicitNone);
}

/// True if the lifetime is either strong or weak.
bool hasStrongOrWeakObjCLifetime() const {
  ObjCLifetime lifetime = getObjCLifetime();
  return (lifetime == OCL_Strong || lifetime == OCL_Weak);
}

bool hasAddressSpace() const { return Mask & AddressSpaceMask; }
LangAS getAddressSpace() const {
  return static_cast<LangAS>(Mask >> AddressSpaceShift);
}
bool hasTargetSpecificAddressSpace() const {
  return isTargetAddressSpace(getAddressSpace());
}
/// Get the address space attribute value to be printed by diagnostics.
unsigned getAddressSpaceAttributePrintValue() const {
  auto Addr = getAddressSpace();
  // This function is not supposed to be used with language specific
  // address spaces. If that happens, the diagnostic message should consider
  // printing the QualType instead of the address space value.
  assert(Addr == LangAS::Default || hasTargetSpecificAddressSpace())((void)0);
  if (Addr != LangAS::Default)
    return toTargetAddressSpace(Addr);
  // TODO: The diagnostic messages where Addr may be 0 should be fixed
  // since it cannot differentiate the situation where 0 denotes the default
  // address space or user specified __attribute__((address_space(0))).
  return 0;
}
void setAddressSpace(LangAS space) {
  assert((unsigned)space <= MaxAddressSpace)((void)0);
  Mask = (Mask & ~AddressSpaceMask)
       | (((uint32_t) space) << AddressSpaceShift);
}
void removeAddressSpace() { setAddressSpace(LangAS::Default); }
void addAddressSpace(LangAS space) {
  assert(space != LangAS::Default)((void)0);
  setAddressSpace(space);
}

// Fast qualifiers are those that can be allocated directly
// on a QualType object.
bool hasFastQualifiers() const { return getFastQualifiers(); }
unsigned getFastQualifiers() const { return Mask & FastMask; }
void setFastQualifiers(unsigned mask) {
  assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((void)0);
  Mask = (Mask & ~FastMask) | mask;
}
void removeFastQualifiers(unsigned mask) {
  assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((void)0);
  Mask &= ~mask;
}
void removeFastQualifiers() {
  removeFastQualifiers(FastMask);
}
void addFastQualifiers(unsigned mask) {
  assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((void)0);
  Mask |= mask;
}

/// Return true if the set contains any qualifiers which require an ExtQuals
/// node to be allocated.
bool hasNonFastQualifiers() const { return Mask & ~FastMask; }
Qualifiers getNonFastQualifiers() const {
  Qualifiers Quals = *this;
  Quals.setFastQualifiers(0);
  return Quals;
}

/// Return true if the set contains any qualifiers.
bool hasQualifiers() const { return Mask; }
bool empty() const { return !Mask; }

/// Add the qualifiers from the given set to this set.
void addQualifiers(Qualifiers Q) {
  // If the other set doesn't have any non-boolean qualifiers, just
  // bit-or it in.
  if (!(Q.Mask & ~CVRMask))
    Mask |= Q.Mask;
  else {
    Mask |= (Q.Mask & CVRMask);
    if (Q.hasAddressSpace())
      addAddressSpace(Q.getAddressSpace());
    if (Q.hasObjCGCAttr())
      addObjCGCAttr(Q.getObjCGCAttr());
    if (Q.hasObjCLifetime())
      addObjCLifetime(Q.getObjCLifetime());
  }
}

/// Remove the qualifiers from the given set from this set.
void removeQualifiers(Qualifiers Q) {
  // If the other set doesn't have any non-boolean qualifiers, just
  // bit-and the inverse in.
  if (!(Q.Mask & ~CVRMask))
    Mask &= ~Q.Mask;
  else {
    Mask &= ~(Q.Mask & CVRMask);
    if (getObjCGCAttr() == Q.getObjCGCAttr())
      removeObjCGCAttr();
    if (getObjCLifetime() == Q.getObjCLifetime())
      removeObjCLifetime();
    if (getAddressSpace() == Q.getAddressSpace())
      removeAddressSpace();
  }
}

/// Add the qualifiers from the given set to this set, given that
/// they don't conflict.
void addConsistentQualifiers(Qualifiers qs) {
  assert(getAddressSpace() == qs.getAddressSpace() ||((void)0)
         !hasAddressSpace() || !qs.hasAddressSpace())((void)0);
  assert(getObjCGCAttr() == qs.getObjCGCAttr() ||((void)0)
         !hasObjCGCAttr() || !qs.hasObjCGCAttr())((void)0);
  assert(getObjCLifetime() == qs.getObjCLifetime() ||((void)0)
         !hasObjCLifetime() || !qs.hasObjCLifetime())((void)0);
  Mask |= qs.Mask;
}

/// Returns true if address space A is equal to or a superset of B.
/// OpenCL v2.0 defines conversion rules (OpenCLC v2.0 s6.5.5) and notion of
/// overlapping address spaces.
/// CL1.1 or CL1.2:
///   every address space is a superset of itself.
/// CL2.0 adds:
///   __generic is a superset of any address space except for __constant.
static bool isAddressSpaceSupersetOf(LangAS A, LangAS B) {
  // Address spaces must match exactly.
  return A == B ||
         // Otherwise in OpenCLC v2.0 s6.5.5: every address space except
         // for __constant can be used as __generic.
         (A == LangAS::opencl_generic && B != LangAS::opencl_constant) ||
         // We also define global_device and global_host address spaces,
         // to distinguish global pointers allocated on host from pointers
         // allocated on device, which are a subset of __global.
         (A == LangAS::opencl_global && (B == LangAS::opencl_global_device ||
                                         B == LangAS::opencl_global_host)) ||
         (A == LangAS::sycl_global && (B == LangAS::sycl_global_device ||
                                       B == LangAS::sycl_global_host)) ||
         // Consider pointer size address spaces to be equivalent to default.
         ((isPtrSizeAddressSpace(A) || A == LangAS::Default) &&
          (isPtrSizeAddressSpace(B) || B == LangAS::Default)) ||
         // Default is a superset of SYCL address spaces.
         (A == LangAS::Default &&
          (B == LangAS::sycl_private || B == LangAS::sycl_local ||
           B == LangAS::sycl_global || B == LangAS::sycl_global_device ||
           B == LangAS::sycl_global_host));
}

/// Returns true if the address space in these qualifiers is equal to or
/// a superset of the address space in the argument qualifiers.
bool isAddressSpaceSupersetOf(Qualifiers other) const {
  return isAddressSpaceSupersetOf(getAddressSpace(), other.getAddressSpace());
}

/// Determines if these qualifiers compatibly include another set.
/// Generally this answers the question of whether an object with the other
/// qualifiers can be safely used as an object with these qualifiers.
bool compatiblyIncludes(Qualifiers other) const {
  return isAddressSpaceSupersetOf(other) &&
         // ObjC GC qualifiers can match, be added, or be removed, but can't
         // be changed.
         (getObjCGCAttr() == other.getObjCGCAttr() || !hasObjCGCAttr() ||
          !other.hasObjCGCAttr()) &&
         // ObjC lifetime qualifiers must match exactly.
         getObjCLifetime() == other.getObjCLifetime() &&
         // CVR qualifiers may subset.
         (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)) &&
         // U qualifier may superset.
         (!other.hasUnaligned() || hasUnaligned());
}

/// Determines if these qualifiers compatibly include another set of
/// qualifiers from the narrow perspective of Objective-C ARC lifetime.
///
/// One set of Objective-C lifetime qualifiers compatibly includes the other
/// if the lifetime qualifiers match, or if both are non-__weak and the
/// including set also contains the 'const' qualifier, or both are non-__weak
/// and one is None (which can only happen in non-ARC modes).
bool compatiblyIncludesObjCLifetime(Qualifiers other) const {
  if (getObjCLifetime() == other.getObjCLifetime())
    return true;

  if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak)
    return false;

  if (getObjCLifetime() == OCL_None || other.getObjCLifetime() == OCL_None)
    return true;

  return hasConst();
}

/// Determine whether this set of qualifiers is a strict superset of
/// another set of qualifiers, not considering qualifier compatibility.
bool isStrictSupersetOf(Qualifiers Other) const;

bool operator==(Qualifiers Other) const { return Mask == Other.Mask; }
bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; }

explicit operator bool() const { return hasQualifiers(); }

Qualifiers &operator+=(Qualifiers R) {
  addQualifiers(R);
  return *this;
}

// Union two qualifier sets.  If an enumerated qualifier appears
// in both sets, use the one from the right.
friend Qualifiers operator+(Qualifiers L, Qualifiers R) {
  L += R;
  return L;
}

Qualifiers &operator-=(Qualifiers R) {
  removeQualifiers(R);
  return *this;
}

/// Compute the difference between two qualifier sets.
friend Qualifiers operator-(Qualifiers L, Qualifiers R) {
  L -= R;
  return L;
}

std::string getAsString() const;
std::string getAsString(const PrintingPolicy &Policy) const;

static std::string getAddrSpaceAsString(LangAS AS);

bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const;
void print(raw_ostream &OS, const PrintingPolicy &Policy,
           bool appendSpaceIfNonEmpty = false) const;

void Profile(llvm::FoldingSetNodeID &ID) const {
  ID.AddInteger(Mask);
}

589private:
// bits:     |0 1 2|3|4 .. 5|6  ..  8|9   ...   31|
//           |C R V|U|GCAttr|Lifetime|AddressSpace|
uint32_t Mask = 0;

static const uint32_t UMask = 0x8;
static const uint32_t UShift = 3;
static const uint32_t GCAttrMask = 0x30;
static const uint32_t GCAttrShift = 4;
static const uint32_t LifetimeMask = 0x1C0;
static const uint32_t LifetimeShift = 6;
static const uint32_t AddressSpaceMask =
    ~(CVRMask | UMask | GCAttrMask | LifetimeMask);
static const uint32_t AddressSpaceShift = 9;
603};

605/// A std::pair-like structure for storing a qualified type split
606/// into its local qualifiers and its locally-unqualified type.
607struct SplitQualType {
/// The locally-unqualified type.
const Type *Ty = nullptr;

/// The local qualifiers.
Qualifiers Quals;

SplitQualType() = default;
SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {}

SplitQualType getSingleStepDesugaredType() const; // end of this file

// Make std::tie work.
std::pair<const Type *,Qualifiers> asPair() const {
  return std::pair<const Type *, Qualifiers>(Ty, Quals);
}

friend bool operator==(SplitQualType a, SplitQualType b) {
  return a.Ty == b.Ty && a.Quals == b.Quals;
}
friend bool operator!=(SplitQualType a, SplitQualType b) {
  return a.Ty != b.Ty || a.Quals != b.Quals;
}
630};

632/// The kind of type we are substituting Objective-C type arguments into.
633///
634/// The kind of substitution affects the replacement of type parameters when
635/// no concrete type information is provided, e.g., when dealing with an
636/// unspecialized type.
637enum class ObjCSubstitutionContext {
/// An ordinary type.
Ordinary,

/// The result type of a method or function.
Result,

/// The parameter type of a method or function.
Parameter,

/// The type of a property.
Property,

/// The superclass of a type.
Superclass,
652};

654/// A (possibly-)qualified type.
655///
656/// For efficiency, we don't store CV-qualified types as nodes on their
657/// own: instead each reference to a type stores the qualifiers.  This
658/// greatly reduces the number of nodes we need to allocate for types (for
659/// example we only need one for 'int', 'const int', 'volatile int',
660/// 'const volatile int', etc).
661///
662/// As an added efficiency bonus, instead of making this a pair, we
663/// just store the two bits we care about in the low bits of the
664/// pointer.  To handle the packing/unpacking, we make QualType be a
665/// simple wrapper class that acts like a smart pointer.  A third bit
666/// indicates whether there are extended qualifiers present, in which
667/// case the pointer points to a special structure.
668class QualType {
friend class QualifierCollector;

// Thankfully, these are efficiently composable.
llvm::PointerIntPair<llvm::PointerUnion<const Type *, const ExtQuals *>,
                     Qualifiers::FastWidth> Value;

const ExtQuals *getExtQualsUnsafe() const {
  return Value.getPointer().get<const ExtQuals*>();
}

const Type *getTypePtrUnsafe() const {
  return Value.getPointer().get<const Type*>();
}

const ExtQualsTypeCommonBase *getCommonPtr() const {
  assert(!isNull() && "Cannot retrieve a NULL type pointer")((void)0);
  auto CommonPtrVal = reinterpret_cast<uintptr_t>(Value.getOpaqueValue());
  CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1);
  return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal);
}

690public:
QualType() = default;
QualType(const Type *Ptr, unsigned Quals) : Value(Ptr, Quals) {}
QualType(const ExtQuals *Ptr, unsigned Quals) : Value(Ptr, Quals) {}

unsigned getLocalFastQualifiers() const { return Value.getInt(); }
void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); }

/// Retrieves a pointer to the underlying (unqualified) type.
///
/// This function requires that the type not be NULL. If the type might be
/// NULL, use the (slightly less efficient) \c getTypePtrOrNull().
const Type *getTypePtr() const;

const Type *getTypePtrOrNull() const;

/// Retrieves a pointer to the name of the base type.
const IdentifierInfo *getBaseTypeIdentifier() const;

/// Divides a QualType into its unqualified type and a set of local
/// qualifiers.
SplitQualType split() const;

void *getAsOpaquePtr() const { return Value.getOpaqueValue(); }

static QualType getFromOpaquePtr(const void *Ptr) {
  QualType T;
  T.Value.setFromOpaqueValue(const_cast<void*>(Ptr));
  return T;
}

const Type &operator*() const {
  return *getTypePtr();
}

const Type *operator->() const {
  return getTypePtr();
}

bool isCanonical() const;
bool isCanonicalAsParam() const;

/// Return true if this QualType doesn't point to a type yet.
bool isNull() const {
  return Value.getPointer().isNull();
22
←
Calling 'PointerUnion::isNull'→
25
←
Returning from 'PointerUnion::isNull'→
26
←
Returning the value 1, which participates in a condition later→
}

/// Determine whether this particular QualType instance has the
/// "const" qualifier set, without looking through typedefs that may have
/// added "const" at a different level.
bool isLocalConstQualified() const {
  return (getLocalFastQualifiers() & Qualifiers::Const);
}

/// Determine whether this type is const-qualified.
bool isConstQualified() const;

/// Determine whether this particular QualType instance has the
/// "restrict" qualifier set, without looking through typedefs that may have
/// added "restrict" at a different level.
bool isLocalRestrictQualified() const {
  return (getLocalFastQualifiers() & Qualifiers::Restrict);
}

/// Determine whether this type is restrict-qualified.
bool isRestrictQualified() const;

/// Determine whether this particular QualType instance has the
/// "volatile" qualifier set, without looking through typedefs that may have
/// added "volatile" at a different level.
bool isLocalVolatileQualified() const {
  return (getLocalFastQualifiers() & Qualifiers::Volatile);
}

/// Determine whether this type is volatile-qualified.
bool isVolatileQualified() const;

/// Determine whether this particular QualType instance has any
/// qualifiers, without looking through any typedefs that might add
/// qualifiers at a different level.
bool hasLocalQualifiers() const {
  return getLocalFastQualifiers() || hasLocalNonFastQualifiers();
}

/// Determine whether this type has any qualifiers.
bool hasQualifiers() const;

/// Determine whether this particular QualType instance has any
/// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType
/// instance.
bool hasLocalNonFastQualifiers() const {
  return Value.getPointer().is<const ExtQuals*>();
}

/// Retrieve the set of qualifiers local to this particular QualType
/// instance, not including any qualifiers acquired through typedefs or
/// other sugar.
Qualifiers getLocalQualifiers() const;

/// Retrieve the set of qualifiers applied to this type.
Qualifiers getQualifiers() const;

/// Retrieve the set of CVR (const-volatile-restrict) qualifiers
/// local to this particular QualType instance, not including any qualifiers
/// acquired through typedefs or other sugar.
unsigned getLocalCVRQualifiers() const {
  return getLocalFastQualifiers();
}

/// Retrieve the set of CVR (const-volatile-restrict) qualifiers
/// applied to this type.
unsigned getCVRQualifiers() const;

bool isConstant(const ASTContext& Ctx) const {
  return QualType::isConstant(*this, Ctx);
}

/// Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10).
bool isPODType(const ASTContext &Context) const;

/// Return true if this is a POD type according to the rules of the C++98
/// standard, regardless of the current compilation's language.
bool isCXX98PODType(const ASTContext &Context) const;

/// Return true if this is a POD type according to the more relaxed rules
/// of the C++11 standard, regardless of the current compilation's language.
/// (C++0x [basic.types]p9). Note that, unlike
/// CXXRecordDecl::isCXX11StandardLayout, this takes DRs into account.
bool isCXX11PODType(const ASTContext &Context) const;

/// Return true if this is a trivial type per (C++0x [basic.types]p9)
bool isTrivialType(const ASTContext &Context) const;

/// Return true if this is a trivially copyable type (C++0x [basic.types]p9)
bool isTriviallyCopyableType(const ASTContext &Context) const;


/// Returns true if it is a class and it might be dynamic.
bool mayBeDynamicClass() const;

/// Returns true if it is not a class or if the class might not be dynamic.
bool mayBeNotDynamicClass() const;

// Don't promise in the API that anything besides 'const' can be
// easily added.

/// Add the `const` type qualifier to this QualType.
void addConst() {
  addFastQualifiers(Qualifiers::Const);
}
QualType withConst() const {
  return withFastQualifiers(Qualifiers::Const);
}

/// Add the `volatile` type qualifier to this QualType.
void addVolatile() {
  addFastQualifiers(Qualifiers::Volatile);
}
QualType withVolatile() const {
  return withFastQualifiers(Qualifiers::Volatile);
}

/// Add the `restrict` qualifier to this QualType.
void addRestrict() {
  addFastQualifiers(Qualifiers::Restrict);
}
QualType withRestrict() const {
  return withFastQualifiers(Qualifiers::Restrict);
}

QualType withCVRQualifiers(unsigned CVR) const {
  return withFastQualifiers(CVR);
}

void addFastQualifiers(unsigned TQs) {
  assert(!(TQs & ~Qualifiers::FastMask)((void)0)
         && "non-fast qualifier bits set in mask!")((void)0);
  Value.setInt(Value.getInt() | TQs);
}

void removeLocalConst();
void removeLocalVolatile();
void removeLocalRestrict();
void removeLocalCVRQualifiers(unsigned Mask);

void removeLocalFastQualifiers() { Value.setInt(0); }
void removeLocalFastQualifiers(unsigned Mask) {
  assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers")((void)0);
  Value.setInt(Value.getInt() & ~Mask);
}

// Creates a type with the given qualifiers in addition to any
// qualifiers already on this type.
QualType withFastQualifiers(unsigned TQs) const {
  QualType T = *this;
  T.addFastQualifiers(TQs);
  return T;
}

// Creates a type with exactly the given fast qualifiers, removing
// any existing fast qualifiers.
QualType withExactLocalFastQualifiers(unsigned TQs) const {
  return withoutLocalFastQualifiers().withFastQualifiers(TQs);
}

// Removes fast qualifiers, but leaves any extended qualifiers in place.
QualType withoutLocalFastQualifiers() const {
  QualType T = *this;
  T.removeLocalFastQualifiers();
  return T;
}

QualType getCanonicalType() const;

/// Return this type with all of the instance-specific qualifiers
/// removed, but without removing any qualifiers that may have been applied
/// through typedefs.
QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); }

/// Retrieve the unqualified variant of the given type,
/// removing as little sugar as possible.
///
/// This routine looks through various kinds of sugar to find the
/// least-desugared type that is unqualified. For example, given:
///
/// \code
/// typedef int Integer;
/// typedef const Integer CInteger;
/// typedef CInteger DifferenceType;
/// \endcode
///
/// Executing \c getUnqualifiedType() on the type \c DifferenceType will
/// desugar until we hit the type \c Integer, which has no qualifiers on it.
///
/// The resulting type might still be qualified if it's sugar for an array
/// type.  To strip qualifiers even from within a sugared array type, use
/// ASTContext::getUnqualifiedArrayType.
inline QualType getUnqualifiedType() const;

/// Retrieve the unqualified variant of the given type, removing as little
/// sugar as possible.
///
/// Like getUnqualifiedType(), but also returns the set of
/// qualifiers that were built up.
///
/// The resulting type might still be qualified if it's sugar for an array
/// type.  To strip qualifiers even from within a sugared array type, use
/// ASTContext::getUnqualifiedArrayType.
inline SplitQualType getSplitUnqualifiedType() const;

/// Determine whether this type is more qualified than the other
/// given type, requiring exact equality for non-CVR qualifiers.
bool isMoreQualifiedThan(QualType Other) const;

/// Determine whether this type is at least as qualified as the other
/// given type, requiring exact equality for non-CVR qualifiers.
bool isAtLeastAsQualifiedAs(QualType Other) const;

QualType getNonReferenceType() const;

/// Determine the type of a (typically non-lvalue) expression with the
/// specified result type.
///
/// This routine should be used for expressions for which the return type is
/// explicitly specified (e.g., in a cast or call) and isn't necessarily
/// an lvalue. It removes a top-level reference (since there are no
/// expressions of reference type) and deletes top-level cvr-qualifiers
/// from non-class types (in C++) or all types (in C).
QualType getNonLValueExprType(const ASTContext &Context) const;

/// Remove an outer pack expansion type (if any) from this type. Used as part
/// of converting the type of a declaration to the type of an expression that
/// references that expression. It's meaningless for an expression to have a
/// pack expansion type.
QualType getNonPackExpansionType() const;

/// Return the specified type with any "sugar" removed from
/// the type.  This takes off typedefs, typeof's etc.  If the outer level of
/// the type is already concrete, it returns it unmodified.  This is similar
/// to getting the canonical type, but it doesn't remove *all* typedefs.  For
/// example, it returns "T*" as "T*", (not as "int*"), because the pointer is
/// concrete.
///
/// Qualifiers are left in place.
QualType getDesugaredType(const ASTContext &Context) const {
  return getDesugaredType(*this, Context);
}

SplitQualType getSplitDesugaredType() const {
  return getSplitDesugaredType(*this);
}

/// Return the specified type with one level of "sugar" removed from
/// the type.
///
/// This routine takes off the first typedef, typeof, etc. If the outer level
/// of the type is already concrete, it returns it unmodified.
QualType getSingleStepDesugaredType(const ASTContext &Context) const {
  return getSingleStepDesugaredTypeImpl(*this, Context);
}

/// Returns the specified type after dropping any
/// outer-level parentheses.
QualType IgnoreParens() const {
  if (isa<ParenType>(*this))
    return QualType::IgnoreParens(*this);
  return *this;
}

/// Indicate whether the specified types and qualifiers are identical.
friend bool operator==(const QualType &LHS, const QualType &RHS) {
  return LHS.Value == RHS.Value;
}
friend bool operator!=(const QualType &LHS, const QualType &RHS) {
  return LHS.Value != RHS.Value;
}
friend bool operator<(const QualType &LHS, const QualType &RHS) {
  return LHS.Value < RHS.Value;
}

static std::string getAsString(SplitQualType split,
                               const PrintingPolicy &Policy) {
  return getAsString(split.Ty, split.Quals, Policy);
}
static std::string getAsString(const Type *ty, Qualifiers qs,
                               const PrintingPolicy &Policy);

std::string getAsString() const;
std::string getAsString(const PrintingPolicy &Policy) const;

void print(raw_ostream &OS, const PrintingPolicy &Policy,
           const Twine &PlaceHolder = Twine(),
           unsigned Indentation = 0) const;

static void print(SplitQualType split, raw_ostream &OS,
                  const PrintingPolicy &policy, const Twine &PlaceHolder,
                  unsigned Indentation = 0) {
  return print(split.Ty, split.Quals, OS, policy, PlaceHolder, Indentation);
}

static void print(const Type *ty, Qualifiers qs,
                  raw_ostream &OS, const PrintingPolicy &policy,
                  const Twine &PlaceHolder,
                  unsigned Indentation = 0);

void getAsStringInternal(std::string &Str,
                         const PrintingPolicy &Policy) const;

static void getAsStringInternal(SplitQualType split, std::string &out,
                                const PrintingPolicy &policy) {
  return getAsStringInternal(split.Ty, split.Quals, out, policy);
}

static void getAsStringInternal(const Type *ty, Qualifiers qs,
                                std::string &out,
                                const PrintingPolicy &policy);

class StreamedQualTypeHelper {
  const QualType &T;
  const PrintingPolicy &Policy;
  const Twine &PlaceHolder;
  unsigned Indentation;

public:
  StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy,
                         const Twine &PlaceHolder, unsigned Indentation)
      : T(T), Policy(Policy), PlaceHolder(PlaceHolder),
        Indentation(Indentation) {}

  friend raw_ostream &operator<<(raw_ostream &OS,
                                 const StreamedQualTypeHelper &SQT) {
    SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder, SQT.Indentation);
    return OS;
  }
};

StreamedQualTypeHelper stream(const PrintingPolicy &Policy,
                              const Twine &PlaceHolder = Twine(),
                              unsigned Indentation = 0) const {
  return StreamedQualTypeHelper(*this, Policy, PlaceHolder, Indentation);
}

void dump(const char *s) const;
void dump() const;
void dump(llvm::raw_ostream &OS, const ASTContext &Context) const;

void Profile(llvm::FoldingSetNodeID &ID) const {
  ID.AddPointer(getAsOpaquePtr());
}

/// Check if this type has any address space qualifier.
inline bool hasAddressSpace() const;

/// Return the address space of this type.
inline LangAS getAddressSpace() const;

/// Returns true if address space qualifiers overlap with T address space
/// qualifiers.
/// OpenCL C defines conversion rules for pointers to different address spaces
/// and notion of overlapping address spaces.
/// CL1.1 or CL1.2:
///   address spaces overlap iff they are they same.
/// OpenCL C v2.0 s6.5.5 adds:
///   __generic overlaps with any address space except for __constant.
bool isAddressSpaceOverlapping(QualType T) const {
  Qualifiers Q = getQualifiers();
  Qualifiers TQ = T.getQualifiers();
  // Address spaces overlap if at least one of them is a superset of another
  return Q.isAddressSpaceSupersetOf(TQ) || TQ.isAddressSpaceSupersetOf(Q);
}

/// Returns gc attribute of this type.
inline Qualifiers::GC getObjCGCAttr() const;

/// true when Type is objc's weak.
bool isObjCGCWeak() const {
  return getObjCGCAttr() == Qualifiers::Weak;
}

/// true when Type is objc's strong.
bool isObjCGCStrong() const {
  return getObjCGCAttr() == Qualifiers::Strong;
}

/// Returns lifetime attribute of this type.
Qualifiers::ObjCLifetime getObjCLifetime() const {
  return getQualifiers().getObjCLifetime();
}

bool hasNonTrivialObjCLifetime() const {
  return getQualifiers().hasNonTrivialObjCLifetime();
}

bool hasStrongOrWeakObjCLifetime() const {
  return getQualifiers().hasStrongOrWeakObjCLifetime();
}

// true when Type is objc's weak and weak is enabled but ARC isn't.
bool isNonWeakInMRRWithObjCWeak(const ASTContext &Context) const;

enum PrimitiveDefaultInitializeKind {
  /// The type does not fall into any of the following categories. Note that
  /// this case is zero-valued so that values of this enum can be used as a
  /// boolean condition for non-triviality.
  PDIK_Trivial,

  /// The type is an Objective-C retainable pointer type that is qualified
  /// with the ARC __strong qualifier.
  PDIK_ARCStrong,

  /// The type is an Objective-C retainable pointer type that is qualified
  /// with the ARC __weak qualifier.
  PDIK_ARCWeak,

  /// The type is a struct containing a field whose type is not PCK_Trivial.
  PDIK_Struct
};

/// Functions to query basic properties of non-trivial C struct types.

/// Check if this is a non-trivial type that would cause a C struct
/// transitively containing this type to be non-trivial to default initialize
/// and return the kind.
PrimitiveDefaultInitializeKind
isNonTrivialToPrimitiveDefaultInitialize() const;

enum PrimitiveCopyKind {
  /// The type does not fall into any of the following categories. Note that
  /// this case is zero-valued so that values of this enum can be used as a
  /// boolean condition for non-triviality.
  PCK_Trivial,

  /// The type would be trivial except that it is volatile-qualified. Types
  /// that fall into one of the other non-trivial cases may additionally be
  /// volatile-qualified.
  PCK_VolatileTrivial,

  /// The type is an Objective-C retainable pointer type that is qualified
  /// with the ARC __strong qualifier.
  PCK_ARCStrong,

  /// The type is an Objective-C retainable pointer type that is qualified
  /// with the ARC __weak qualifier.
  PCK_ARCWeak,

  /// The type is a struct containing a field whose type is neither
  /// PCK_Trivial nor PCK_VolatileTrivial.
  /// Note that a C++ struct type does not necessarily match this; C++ copying
  /// semantics are too complex to express here, in part because they depend
  /// on the exact constructor or assignment operator that is chosen by
  /// overload resolution to do the copy.
  PCK_Struct
};

/// Check if this is a non-trivial type that would cause a C struct
/// transitively containing this type to be non-trivial to copy and return the
/// kind.
PrimitiveCopyKind isNonTrivialToPrimitiveCopy() const;

/// Check if this is a non-trivial type that would cause a C struct
/// transitively containing this type to be non-trivial to destructively
/// move and return the kind. Destructive move in this context is a C++-style
/// move in which the source object is placed in a valid but unspecified state
/// after it is moved, as opposed to a truly destructive move in which the
/// source object is placed in an uninitialized state.
PrimitiveCopyKind isNonTrivialToPrimitiveDestructiveMove() const;

enum DestructionKind {
  DK_none,
  DK_cxx_destructor,
  DK_objc_strong_lifetime,
  DK_objc_weak_lifetime,
  DK_nontrivial_c_struct
};

/// Returns a nonzero value if objects of this type require
/// non-trivial work to clean up after.  Non-zero because it's
/// conceivable that qualifiers (objc_gc(weak)?) could make
/// something require destruction.
DestructionKind isDestructedType() const {
  return isDestructedTypeImpl(*this);
}

/// Check if this is or contains a C union that is non-trivial to
/// default-initialize, which is a union that has a member that is non-trivial
/// to default-initialize. If this returns true,
/// isNonTrivialToPrimitiveDefaultInitialize returns PDIK_Struct.
bool hasNonTrivialToPrimitiveDefaultInitializeCUnion() const;

/// Check if this is or contains a C union that is non-trivial to destruct,
/// which is a union that has a member that is non-trivial to destruct. If
/// this returns true, isDestructedType returns DK_nontrivial_c_struct.
bool hasNonTrivialToPrimitiveDestructCUnion() const;

/// Check if this is or contains a C union that is non-trivial to copy, which
/// is a union that has a member that is non-trivial to copy. If this returns
/// true, isNonTrivialToPrimitiveCopy returns PCK_Struct.
bool hasNonTrivialToPrimitiveCopyCUnion() const;

/// Determine whether expressions of the given type are forbidden
/// from being lvalues in C.
///
/// The expression types that are forbidden to be lvalues are:
///   - 'void', but not qualified void
///   - function types
///
/// The exact rule here is C99 6.3.2.1:
///   An lvalue is an expression with an object type or an incomplete
///   type other than void.
bool isCForbiddenLValueType() const;

/// Substitute type arguments for the Objective-C type parameters used in the
/// subject type.
///
/// \param ctx ASTContext in which the type exists.
///
/// \param typeArgs The type arguments that will be substituted for the
/// Objective-C type parameters in the subject type, which are generally
/// computed via \c Type::getObjCSubstitutions. If empty, the type
/// parameters will be replaced with their bounds or id/Class, as appropriate
/// for the context.
///
/// \param context The context in which the subject type was written.
///
/// \returns the resulting type.
QualType substObjCTypeArgs(ASTContext &ctx,
                           ArrayRef<QualType> typeArgs,
                           ObjCSubstitutionContext context) const;

/// Substitute type arguments from an object type for the Objective-C type
/// parameters used in the subject type.
///
/// This operation combines the computation of type arguments for
/// substitution (\c Type::getObjCSubstitutions) with the actual process of
/// substitution (\c QualType::substObjCTypeArgs) for the convenience of
/// callers that need to perform a single substitution in isolation.
///
/// \param objectType The type of the object whose member type we're
/// substituting into. For example, this might be the receiver of a message
/// or the base of a property access.
///
/// \param dc The declaration context from which the subject type was
/// retrieved, which indicates (for example) which type parameters should
/// be substituted.
///
/// \param context The context in which the subject type was written.
///
/// \returns the subject type after replacing all of the Objective-C type
/// parameters with their corresponding arguments.
QualType substObjCMemberType(QualType objectType,
                             const DeclContext *dc,
                             ObjCSubstitutionContext context) const;

/// Strip Objective-C "__kindof" types from the given type.
QualType stripObjCKindOfType(const ASTContext &ctx) const;

/// Remove all qualifiers including _Atomic.
QualType getAtomicUnqualifiedType() const;

1289private:
// These methods are implemented in a separate translation unit;
// "static"-ize them to avoid creating temporary QualTypes in the
// caller.
static bool isConstant(QualType T, const ASTContext& Ctx);
static QualType getDesugaredType(QualType T, const ASTContext &Context);
static SplitQualType getSplitDesugaredType(QualType T);
static SplitQualType getSplitUnqualifiedTypeImpl(QualType type);
static QualType getSingleStepDesugaredTypeImpl(QualType type,
                                               const ASTContext &C);
static QualType IgnoreParens(QualType T);
static DestructionKind isDestructedTypeImpl(QualType type);

/// Check if \param RD is or contains a non-trivial C union.
static bool hasNonTrivialToPrimitiveDefaultInitializeCUnion(const RecordDecl *RD);
static bool hasNonTrivialToPrimitiveDestructCUnion(const RecordDecl *RD);
static bool hasNonTrivialToPrimitiveCopyCUnion(const RecordDecl *RD);
1306};

1308} // namespace clang

1310namespace llvm {

1312/// Implement simplify_type for QualType, so that we can dyn_cast from QualType
1313/// to a specific Type class.
1314template<> struct simplify_type< ::clang::QualType> {
using SimpleType = const ::clang::Type *;

static SimpleType getSimplifiedValue(::clang::QualType Val) {
  return Val.getTypePtr();
}
1320};

1322// Teach SmallPtrSet that QualType is "basically a pointer".
1323template<>
1324struct PointerLikeTypeTraits<clang::QualType> {
static inline void *getAsVoidPointer(clang::QualType P) {
  return P.getAsOpaquePtr();
}

static inline clang::QualType getFromVoidPointer(void *P) {
  return clang::QualType::getFromOpaquePtr(P);
}

// Various qualifiers go in low bits.
static constexpr int NumLowBitsAvailable = 0;
1335};

1337} // namespace llvm

1339namespace clang {

1341/// Base class that is common to both the \c ExtQuals and \c Type
1342/// classes, which allows \c QualType to access the common fields between the
1343/// two.
1344class ExtQualsTypeCommonBase {
friend class ExtQuals;
friend class QualType;
friend class Type;

/// The "base" type of an extended qualifiers type (\c ExtQuals) or
/// a self-referential pointer (for \c Type).
///
/// This pointer allows an efficient mapping from a QualType to its
/// underlying type pointer.
const Type *const BaseType;

/// The canonical type of this type.  A QualType.
QualType CanonicalType;

ExtQualsTypeCommonBase(const Type *baseType, QualType canon)
    : BaseType(baseType), CanonicalType(canon) {}
1361};

1363/// We can encode up to four bits in the low bits of a
1364/// type pointer, but there are many more type qualifiers that we want
1365/// to be able to apply to an arbitrary type.  Therefore we have this
1366/// struct, intended to be heap-allocated and used by QualType to
1367/// store qualifiers.
1368///
1369/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers
1370/// in three low bits on the QualType pointer; a fourth bit records whether
1371/// the pointer is an ExtQuals node. The extended qualifiers (address spaces,
1372/// Objective-C GC attributes) are much more rare.
1373class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode {
// NOTE: changing the fast qualifiers should be straightforward as
// long as you don't make 'const' non-fast.
// 1. Qualifiers:
//    a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ).
//       Fast qualifiers must occupy the low-order bits.
//    b) Update Qualifiers::FastWidth and FastMask.
// 2. QualType:
//    a) Update is{Volatile,Restrict}Qualified(), defined inline.
//    b) Update remove{Volatile,Restrict}, defined near the end of
//       this header.
// 3. ASTContext:
//    a) Update get{Volatile,Restrict}Type.

/// The immutable set of qualifiers applied by this node. Always contains
/// extended qualifiers.
Qualifiers Quals;

ExtQuals *this_() { return this; }

1393public:
ExtQuals(const Type *baseType, QualType canon, Qualifiers quals)
    : ExtQualsTypeCommonBase(baseType,
                             canon.isNull() ? QualType(this_(), 0) : canon),
      Quals(quals) {
  assert(Quals.hasNonFastQualifiers()((void)0)
         && "ExtQuals created with no fast qualifiers")((void)0);
  assert(!Quals.hasFastQualifiers()((void)0)
         && "ExtQuals created with fast qualifiers")((void)0);
}

Qualifiers getQualifiers() const { return Quals; }

bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); }
Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); }

bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); }
Qualifiers::ObjCLifetime getObjCLifetime() const {
  return Quals.getObjCLifetime();
}

bool hasAddressSpace() const { return Quals.hasAddressSpace(); }
LangAS getAddressSpace() const { return Quals.getAddressSpace(); }

const Type *getBaseType() const { return BaseType; }

1419public:
void Profile(llvm::FoldingSetNodeID &ID) const {
  Profile(ID, getBaseType(), Quals);
}

static void Profile(llvm::FoldingSetNodeID &ID,
                    const Type *BaseType,
                    Qualifiers Quals) {
  assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!")((void)0);
  ID.AddPointer(BaseType);
  Quals.Profile(ID);
}
1431};

1433/// The kind of C++11 ref-qualifier associated with a function type.
1434/// This determines whether a member function's "this" object can be an
1435/// lvalue, rvalue, or neither.
1436enum RefQualifierKind {
/// No ref-qualifier was provided.
RQ_None = 0,

/// An lvalue ref-qualifier was provided (\c &).
RQ_LValue,

/// An rvalue ref-qualifier was provided (\c &&).
RQ_RValue
1445};

1447/// Which keyword(s) were used to create an AutoType.
1448enum class AutoTypeKeyword {
/// auto
Auto,

/// decltype(auto)
DecltypeAuto,

/// __auto_type (GNU extension)
GNUAutoType
1457};

1459/// The base class of the type hierarchy.
1460///
1461/// A central concept with types is that each type always has a canonical
1462/// type.  A canonical type is the type with any typedef names stripped out
1463/// of it or the types it references.  For example, consider:
1464///
1465///  typedef int  foo;
1466///  typedef foo* bar;
1467///    'int *'    'foo *'    'bar'
1468///
1469/// There will be a Type object created for 'int'.  Since int is canonical, its
1470/// CanonicalType pointer points to itself.  There is also a Type for 'foo' (a
1471/// TypedefType).  Its CanonicalType pointer points to the 'int' Type.  Next
1472/// there is a PointerType that represents 'int*', which, like 'int', is
1473/// canonical.  Finally, there is a PointerType type for 'foo*' whose canonical
1474/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type
1475/// is also 'int*'.
1476///
1477/// Non-canonical types are useful for emitting diagnostics, without losing
1478/// information about typedefs being used.  Canonical types are useful for type
1479/// comparisons (they allow by-pointer equality tests) and useful for reasoning
1480/// about whether something has a particular form (e.g. is a function type),
1481/// because they implicitly, recursively, strip all typedefs out of a type.
1482///
1483/// Types, once created, are immutable.
1484///
1485class alignas(8) Type : public ExtQualsTypeCommonBase {
1486public:
enum TypeClass {
1488#define TYPE(Class, Base) Class,
1489#define LAST_TYPE(Class) TypeLast = Class
1490#define ABSTRACT_TYPE(Class, Base)
1491#include "clang/AST/TypeNodes.inc"
};

1494private:
/// Bitfields required by the Type class.
class TypeBitfields {
  friend class Type;
  template <class T> friend class TypePropertyCache;

  /// TypeClass bitfield - Enum that specifies what subclass this belongs to.
  unsigned TC : 8;

  /// Store information on the type dependency.
  unsigned Dependence : llvm::BitWidth<TypeDependence>;

  /// True if the cache (i.e. the bitfields here starting with
  /// 'Cache') is valid.
  mutable unsigned CacheValid : 1;

  /// Linkage of this type.
  mutable unsigned CachedLinkage : 3;

  /// Whether this type involves and local or unnamed types.
  mutable unsigned CachedLocalOrUnnamed : 1;

  /// Whether this type comes from an AST file.
  mutable unsigned FromAST : 1;

  bool isCacheValid() const {
    return CacheValid;
  }

  Linkage getLinkage() const {
    assert(isCacheValid() && "getting linkage from invalid cache")((void)0);
    return static_cast<Linkage>(CachedLinkage);
  }

  bool hasLocalOrUnnamedType() const {
    assert(isCacheValid() && "getting linkage from invalid cache")((void)0);
    return CachedLocalOrUnnamed;
  }
};
enum { NumTypeBits = 8 + llvm::BitWidth<TypeDependence> + 6 };

1535protected:
// These classes allow subclasses to somewhat cleanly pack bitfields
// into Type.

class ArrayTypeBitfields {
  friend class ArrayType;

  unsigned : NumTypeBits;

  /// CVR qualifiers from declarations like
  /// 'int X[static restrict 4]'. For function parameters only.
  unsigned IndexTypeQuals : 3;

  /// Storage class qualifiers from declarations like
  /// 'int X[static restrict 4]'. For function parameters only.
  /// Actually an ArrayType::ArraySizeModifier.
  unsigned SizeModifier : 3;
};

class ConstantArrayTypeBitfields {
  friend class ConstantArrayType;

  unsigned : NumTypeBits + 3 + 3;

  /// Whether we have a stored size expression.
  unsigned HasStoredSizeExpr : 1;
};

class BuiltinTypeBitfields {
  friend class BuiltinType;

  unsigned : NumTypeBits;

  /// The kind (BuiltinType::Kind) of builtin type this is.
  unsigned Kind : 8;
};

/// FunctionTypeBitfields store various bits belonging to FunctionProtoType.
/// Only common bits are stored here. Additional uncommon bits are stored
/// in a trailing object after FunctionProtoType.
class FunctionTypeBitfields {
  friend class FunctionProtoType;
  friend class FunctionType;

  unsigned : NumTypeBits;

  /// Extra information which affects how the function is called, like
  /// regparm and the calling convention.
  unsigned ExtInfo : 13;

  /// The ref-qualifier associated with a \c FunctionProtoType.
  ///
  /// This is a value of type \c RefQualifierKind.
  unsigned RefQualifier : 2;

  /// Used only by FunctionProtoType, put here to pack with the
  /// other bitfields.
  /// The qualifiers are part of FunctionProtoType because...
  ///
  /// C++ 8.3.5p4: The return type, the parameter type list and the
  /// cv-qualifier-seq, [...], are part of the function type.
  unsigned FastTypeQuals : Qualifiers::FastWidth;
  /// Whether this function has extended Qualifiers.
  unsigned HasExtQuals : 1;

  /// The number of parameters this function has, not counting '...'.
  /// According to [implimits] 8 bits should be enough here but this is
  /// somewhat easy to exceed with metaprogramming and so we would like to
  /// keep NumParams as wide as reasonably possible.
  unsigned NumParams : 16;

  /// The type of exception specification this function has.
  unsigned ExceptionSpecType : 4;

  /// Whether this function has extended parameter information.
  unsigned HasExtParameterInfos : 1;

  /// Whether the function is variadic.
  unsigned Variadic : 1;

  /// Whether this function has a trailing return type.
  unsigned HasTrailingReturn : 1;
};

class ObjCObjectTypeBitfields {
  friend class ObjCObjectType;

  unsigned : NumTypeBits;

  /// The number of type arguments stored directly on this object type.
  unsigned NumTypeArgs : 7;

  /// The number of protocols stored directly on this object type.
  unsigned NumProtocols : 6;

  /// Whether this is a "kindof" type.
  unsigned IsKindOf : 1;
};

class ReferenceTypeBitfields {
  friend class ReferenceType;

  unsigned : NumTypeBits;

  /// True if the type was originally spelled with an lvalue sigil.
  /// This is never true of rvalue references but can also be false
  /// on lvalue references because of C++0x [dcl.typedef]p9,
  /// as follows:
  ///
  ///   typedef int &ref;    // lvalue, spelled lvalue
  ///   typedef int &&rvref; // rvalue
  ///   ref &a;              // lvalue, inner ref, spelled lvalue
  ///   ref &&a;             // lvalue, inner ref
  ///   rvref &a;            // lvalue, inner ref, spelled lvalue
  ///   rvref &&a;           // rvalue, inner ref
  unsigned SpelledAsLValue : 1;

  /// True if the inner type is a reference type.  This only happens
  /// in non-canonical forms.
  unsigned InnerRef : 1;
};

class TypeWithKeywordBitfields {
  friend class TypeWithKeyword;

  unsigned : NumTypeBits;

  /// An ElaboratedTypeKeyword.  8 bits for efficient access.
  unsigned Keyword : 8;
};

enum { NumTypeWithKeywordBits = 8 };

class ElaboratedTypeBitfields {
  friend class ElaboratedType;

  unsigned : NumTypeBits;
  unsigned : NumTypeWithKeywordBits;

  /// Whether the ElaboratedType has a trailing OwnedTagDecl.
  unsigned HasOwnedTagDecl : 1;
};

class VectorTypeBitfields {
  friend class VectorType;
  friend class DependentVectorType;

  unsigned : NumTypeBits;

  /// The kind of vector, either a generic vector type or some
  /// target-specific vector type such as for AltiVec or Neon.
  unsigned VecKind : 3;
  /// The number of elements in the vector.
  uint32_t NumElements;
};

class AttributedTypeBitfields {
  friend class AttributedType;

  unsigned : NumTypeBits;

  /// An AttributedType::Kind
  unsigned AttrKind : 32 - NumTypeBits;
};

class AutoTypeBitfields {
  friend class AutoType;

  unsigned : NumTypeBits;

  /// Was this placeholder type spelled as 'auto', 'decltype(auto)',
  /// or '__auto_type'?  AutoTypeKeyword value.
  unsigned Keyword : 2;

  /// The number of template arguments in the type-constraints, which is
  /// expected to be able to hold at least 1024 according to [implimits].
  /// However as this limit is somewhat easy to hit with template
  /// metaprogramming we'd prefer to keep it as large as possible.
  /// At the moment it has been left as a non-bitfield since this type
  /// safely fits in 64 bits as an unsigned, so there is no reason to
  /// introduce the performance impact of a bitfield.
  unsigned NumArgs;
};

class SubstTemplateTypeParmPackTypeBitfields {
  friend class SubstTemplateTypeParmPackType;

  unsigned : NumTypeBits;

  /// The number of template arguments in \c Arguments, which is
  /// expected to be able to hold at least 1024 according to [implimits].
  /// However as this limit is somewhat easy to hit with template
  /// metaprogramming we'd prefer to keep it as large as possible.
  /// At the moment it has been left as a non-bitfield since this type
  /// safely fits in 64 bits as an unsigned, so there is no reason to
  /// introduce the performance impact of a bitfield.
  unsigned NumArgs;
};

class TemplateSpecializationTypeBitfields {
  friend class TemplateSpecializationType;

  unsigned : NumTypeBits;

  /// Whether this template specialization type is a substituted type alias.
  unsigned TypeAlias : 1;

  /// The number of template arguments named in this class template
  /// specialization, which is expected to be able to hold at least 1024
  /// according to [implimits]. However, as this limit is somewhat easy to
  /// hit with template metaprogramming we'd prefer to keep it as large
  /// as possible. At the moment it has been left as a non-bitfield since
  /// this type safely fits in 64 bits as an unsigned, so there is no reason
  /// to introduce the performance impact of a bitfield.
  unsigned NumArgs;
};

class DependentTemplateSpecializationTypeBitfields {
  friend class DependentTemplateSpecializationType;

  unsigned : NumTypeBits;
  unsigned : NumTypeWithKeywordBits;

  /// The number of template arguments named in this class template
  /// specialization, which is expected to be able to hold at least 1024
  /// according to [implimits]. However, as this limit is somewhat easy to
  /// hit with template metaprogramming we'd prefer to keep it as large
  /// as possible. At the moment it has been left as a non-bitfield since
  /// this type safely fits in 64 bits as an unsigned, so there is no reason
  /// to introduce the performance impact of a bitfield.
  unsigned NumArgs;
};

class PackExpansionTypeBitfields {
  friend class PackExpansionType;

  unsigned : NumTypeBits;

  /// The number of expansions that this pack expansion will
  /// generate when substituted (+1), which is expected to be able to
  /// hold at least 1024 according to [implimits]. However, as this limit
  /// is somewhat easy to hit with template metaprogramming we'd prefer to
  /// keep it as large as possible. At the moment it has been left as a
  /// non-bitfield since this type safely fits in 64 bits as an unsigned, so
  /// there is no reason to introduce the performance impact of a bitfield.
  ///
  /// This field will only have a non-zero value when some of the parameter
  /// packs that occur within the pattern have been substituted but others
  /// have not.
  unsigned NumExpansions;
};

union {
  TypeBitfields TypeBits;
  ArrayTypeBitfields ArrayTypeBits;
  ConstantArrayTypeBitfields ConstantArrayTypeBits;
  AttributedTypeBitfields AttributedTypeBits;
  AutoTypeBitfields AutoTypeBits;
  BuiltinTypeBitfields BuiltinTypeBits;
  FunctionTypeBitfields FunctionTypeBits;
  ObjCObjectTypeBitfields ObjCObjectTypeBits;
  ReferenceTypeBitfields ReferenceTypeBits;
  TypeWithKeywordBitfields TypeWithKeywordBits;
  ElaboratedTypeBitfields ElaboratedTypeBits;
  VectorTypeBitfields VectorTypeBits;
  SubstTemplateTypeParmPackTypeBitfields SubstTemplateTypeParmPackTypeBits;
  TemplateSpecializationTypeBitfields TemplateSpecializationTypeBits;
  DependentTemplateSpecializationTypeBitfields
    DependentTemplateSpecializationTypeBits;
  PackExpansionTypeBitfields PackExpansionTypeBits;
};

1807private:
template <class T> friend class TypePropertyCache;

/// Set whether this type comes from an AST file.
void setFromAST(bool V = true) const {
  TypeBits.FromAST = V;
}

1815protected:
friend class ASTContext;

Type(TypeClass tc, QualType canon, TypeDependence Dependence)
    : ExtQualsTypeCommonBase(this,
                             canon.isNull() ? QualType(this_(), 0) : canon) {
  static_assert(sizeof(*this) <= 8 + sizeof(ExtQualsTypeCommonBase),
                "changing bitfields changed sizeof(Type)!");
  static_assert(alignof(decltype(*this)) % sizeof(void *) == 0,
                "Insufficient alignment!");
  TypeBits.TC = tc;
  TypeBits.Dependence = static_cast<unsigned>(Dependence);
  TypeBits.CacheValid = false;
  TypeBits.CachedLocalOrUnnamed = false;
  TypeBits.CachedLinkage = NoLinkage;
  TypeBits.FromAST = false;
}

// silence VC++ warning C4355: 'this' : used in base member initializer list
Type *this_() { return this; }

void setDependence(TypeDependence D) {
  TypeBits.Dependence = static_cast<unsigned>(D);
}

void addDependence(TypeDependence D) { setDependence(getDependence() | D); }

1842public:
friend class ASTReader;
friend class ASTWriter;
template <class T> friend class serialization::AbstractTypeReader;
template <class T> friend class serialization::AbstractTypeWriter;

Type(const Type &) = delete;
Type(Type &&) = delete;
Type &operator=(const Type &) = delete;
Type &operator=(Type &&) = delete;

TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); }

/// Whether this type comes from an AST file.
bool isFromAST() const { return TypeBits.FromAST; }

/// Whether this type is or contains an unexpanded parameter
/// pack, used to support C++0x variadic templates.
///
/// A type that contains a parameter pack shall be expanded by the
/// ellipsis operator at some point. For example, the typedef in the
/// following example contains an unexpanded parameter pack 'T':
///
/// \code
/// template<typename ...T>
/// struct X {
///   typedef T* pointer_types; // ill-formed; T is a parameter pack.
/// };
/// \endcode
///
/// Note that this routine does not specify which
bool containsUnexpandedParameterPack() const {
  return getDependence() & TypeDependence::UnexpandedPack;
}

/// Determines if this type would be canonical if it had no further
/// qualification.
bool isCanonicalUnqualified() const {
  return CanonicalType == QualType(this, 0);
}

/// Pull a single level of sugar off of this locally-unqualified type.
/// Users should generally prefer SplitQualType::getSingleStepDesugaredType()
/// or QualType::getSingleStepDesugaredType(const ASTContext&).
QualType getLocallyUnqualifiedSingleStepDesugaredType() const;

/// As an extension, we classify types as one of "sized" or "sizeless";
/// every type is one or the other.  Standard types are all sized;
/// sizeless types are purely an extension.
///
/// Sizeless types contain data with no specified size, alignment,
/// or layout.
bool isSizelessType() const;
bool isSizelessBuiltinType() const;

/// Determines if this is a sizeless type supported by the
/// 'arm_sve_vector_bits' type attribute, which can be applied to a single
/// SVE vector or predicate, excluding tuple types such as svint32x4_t.
bool isVLSTBuiltinType() const;

/// Returns the representative type for the element of an SVE builtin type.
/// This is used to represent fixed-length SVE vectors created with the
/// 'arm_sve_vector_bits' type attribute as VectorType.
QualType getSveEltType(const ASTContext &Ctx) const;

/// Types are partitioned into 3 broad categories (C99 6.2.5p1):
/// object types, function types, and incomplete types.

/// Return true if this is an incomplete type.
/// A type that can describe objects, but which lacks information needed to
/// determine its size (e.g. void, or a fwd declared struct). Clients of this
/// routine will need to determine if the size is actually required.
///
/// Def If non-null, and the type refers to some kind of declaration
/// that can be completed (such as a C struct, C++ class, or Objective-C
/// class), will be set to the declaration.
bool isIncompleteType(NamedDecl **Def = nullptr) const;

/// Return true if this is an incomplete or object
/// type, in other words, not a function type.
bool isIncompleteOrObjectType() const {
  return !isFunctionType();
}

/// Determine whether this type is an object type.
bool isObjectType() const {
  // C++ [basic.types]p8:
  //   An object type is a (possibly cv-qualified) type that is not a
  //   function type, not a reference type, and not a void type.
  return !isReferenceType() && !isFunctionType() && !isVoidType();
}

/// Return true if this is a literal type
/// (C++11 [basic.types]p10)
bool isLiteralType(const ASTContext &Ctx) const;

/// Determine if this type is a structural type, per C++20 [temp.param]p7.
bool isStructuralType() const;

/// Test if this type is a standard-layout type.
/// (C++0x [basic.type]p9)
bool isStandardLayoutType() const;

/// Helper methods to distinguish type categories. All type predicates
/// operate on the canonical type, ignoring typedefs and qualifiers.

/// Returns true if the type is a builtin type.
bool isBuiltinType() const;

/// Test for a particular builtin type.
bool isSpecificBuiltinType(unsigned K) const;

/// Test for a type which does not represent an actual type-system type but
/// is instead used as a placeholder for various convenient purposes within
/// Clang.  All such types are BuiltinTypes.
bool isPlaceholderType() const;
const BuiltinType *getAsPlaceholderType() const;

/// Test for a specific placeholder type.
bool isSpecificPlaceholderType(unsigned K) const;

/// Test for a placeholder type other than Overload; see
/// BuiltinType::isNonOverloadPlaceholderType.
bool isNonOverloadPlaceholderType() const;

/// isIntegerType() does *not* include complex integers (a GCC extension).
/// isComplexIntegerType() can be used to test for complex integers.
bool isIntegerType() const;     // C99 6.2.5p17 (int, char, bool, enum)
bool isEnumeralType() const;

/// Determine whether this type is a scoped enumeration type.
bool isScopedEnumeralType() const;
bool isBooleanType() const;
bool isCharType() const;
bool isWideCharType() const;
bool isChar8Type() const;
bool isChar16Type() const;
bool isChar32Type() const;
bool isAnyCharacterType() const;
bool isIntegralType(const ASTContext &Ctx) const;

/// Determine whether this type is an integral or enumeration type.
bool isIntegralOrEnumerationType() const;

/// Determine whether this type is an integral or unscoped enumeration type.
bool isIntegralOrUnscopedEnumerationType() const;
bool isUnscopedEnumerationType() const;

/// Floating point categories.
bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double)
/// isComplexType() does *not* include complex integers (a GCC extension).
/// isComplexIntegerType() can be used to test for complex integers.
bool isComplexType() const;      // C99 6.2.5p11 (complex)
bool isAnyComplexType() const;   // C99 6.2.5p11 (complex) + Complex Int.
bool isFloatingType() const;     // C99 6.2.5p11 (real floating + complex)
bool isHalfType() const;         // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half)
bool isFloat16Type() const;      // C11 extension ISO/IEC TS 18661
bool isBFloat16Type() const;
bool isFloat128Type() const;
bool isRealType() const;         // C99 6.2.5p17 (real floating + integer)
bool isArithmeticType() const;   // C99 6.2.5p18 (integer + floating)
bool isVoidType() const;         // C99 6.2.5p19
bool isScalarType() const;       // C99 6.2.5p21 (arithmetic + pointers)
bool isAggregateType() const;
bool isFundamentalType() const;
bool isCompoundType() const;

// Type Predicates: Check to see if this type is structurally the specified
// type, ignoring typedefs and qualifiers.
bool isFunctionType() const;
bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); }
bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); }
bool isPointerType() const;
bool isAnyPointerType() const;   // Any C pointer or ObjC object pointer
bool isBlockPointerType() const;
bool isVoidPointerType() const;
bool isReferenceType() const;
bool isLValueReferenceType() const;
bool isRValueReferenceType() const;
bool isObjectPointerType() const;
bool isFunctionPointerType() const;
bool isFunctionReferenceType() const;
bool isMemberPointerType() const;
bool isMemberFunctionPointerType() const;
bool isMemberDataPointerType() const;
bool isArrayType() const;
bool isConstantArrayType() const;
bool isIncompleteArrayType() const;
bool isVariableArrayType() const;
bool isDependentSizedArrayType() const;
bool isRecordType() const;
bool isClassType() const;
bool isStructureType() const;
bool isObjCBoxableRecordType() const;
bool isInterfaceType() const;
bool isStructureOrClassType() const;
bool isUnionType() const;
bool isComplexIntegerType() const;            // GCC _Complex integer type.
bool isVectorType() const;                    // GCC vector type.
bool isExtVectorType() const;                 // Extended vector type.
bool isMatrixType() const;                    // Matrix type.
bool isConstantMatrixType() const;            // Constant matrix type.
bool isDependentAddressSpaceType() const;     // value-dependent address space qualifier
bool isObjCObjectPointerType() const;         // pointer to ObjC object
bool isObjCRetainableType() const;            // ObjC object or block pointer
bool isObjCLifetimeType() const;              // (array of)* retainable type
bool isObjCIndirectLifetimeType() const;      // (pointer to)* lifetime type
bool isObjCNSObjectType() const;              // __attribute__((NSObject))
bool isObjCIndependentClassType() const;      // __attribute__((objc_independent_class))
// FIXME: change this to 'raw' interface type, so we can used 'interface' type
// for the common case.
bool isObjCObjectType() const;                // NSString or typeof(*(id)0)
bool isObjCQualifiedInterfaceType() const;    // NSString<foo>
bool isObjCQualifiedIdType() const;           // id<foo>
bool isObjCQualifiedClassType() const;        // Class<foo>
bool isObjCObjectOrInterfaceType() const;
bool isObjCIdType() const;                    // id
bool isDecltypeType() const;
/// Was this type written with the special inert-in-ARC __unsafe_unretained
/// qualifier?
///
/// This approximates the answer to the following question: if this
/// translation unit were compiled in ARC, would this type be qualified
/// with __unsafe_unretained?
bool isObjCInertUnsafeUnretainedType() const {
  return hasAttr(attr::ObjCInertUnsafeUnretained);
}

/// Whether the type is Objective-C 'id' or a __kindof type of an
/// object type, e.g., __kindof NSView * or __kindof id
/// <NSCopying>.
///
/// \param bound Will be set to the bound on non-id subtype types,
/// which will be (possibly specialized) Objective-C class type, or
/// null for 'id.
bool isObjCIdOrObjectKindOfType(const ASTContext &ctx,
                                const ObjCObjectType *&bound) const;

bool isObjCClassType() const;                 // Class

/// Whether the type is Objective-C 'Class' or a __kindof type of an
/// Class type, e.g., __kindof Class <NSCopying>.
///
/// Unlike \c isObjCIdOrObjectKindOfType, there is no relevant bound
/// here because Objective-C's type system cannot express "a class
/// object for a subclass of NSFoo".
bool isObjCClassOrClassKindOfType() const;

bool isBlockCompatibleObjCPointerType(ASTContext &ctx) const;
bool isObjCSelType() const;                 // Class
bool isObjCBuiltinType() const;               // 'id' or 'Class'
bool isObjCARCBridgableType() const;
bool isCARCBridgableType() const;
bool isTemplateTypeParmType() const;          // C++ template type parameter
bool isNullPtrType() const;                   // C++11 std::nullptr_t
bool isNothrowT() const;                      // C++   std::nothrow_t
bool isAlignValT() const;                     // C++17 std::align_val_t
bool isStdByteType() const;                   // C++17 std::byte
bool isAtomicType() const;                    // C11 _Atomic()
bool isUndeducedAutoType() const;             // C++11 auto or
                                              // C++14 decltype(auto)
bool isTypedefNameType() const;               // typedef or alias template

2105#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
bool is##Id##Type() const;
2107#include "clang/Basic/OpenCLImageTypes.def"

bool isImageType() const;                     // Any OpenCL image type

bool isSamplerT() const;                      // OpenCL sampler_t
bool isEventT() const;                        // OpenCL event_t
bool isClkEventT() const;                     // OpenCL clk_event_t
bool isQueueT() const;                        // OpenCL queue_t
bool isReserveIDT() const;                    // OpenCL reserve_id_t

2117#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
bool is##Id##Type() const;
2119#include "clang/Basic/OpenCLExtensionTypes.def"
// Type defined in cl_intel_device_side_avc_motion_estimation OpenCL extension
bool isOCLIntelSubgroupAVCType() const;
bool isOCLExtOpaqueType() const;              // Any OpenCL extension type

bool isPipeType() const;                      // OpenCL pipe type
bool isExtIntType() const;                    // Extended Int Type
bool isOpenCLSpecificType() const;            // Any OpenCL specific type

/// Determines if this type, which must satisfy
/// isObjCLifetimeType(), is implicitly __unsafe_unretained rather
/// than implicitly __strong.
bool isObjCARCImplicitlyUnretainedType() const;

/// Check if the type is the CUDA device builtin surface type.
bool isCUDADeviceBuiltinSurfaceType() const;
/// Check if the type is the CUDA device builtin texture type.
bool isCUDADeviceBuiltinTextureType() const;

/// Return the implicit lifetime for this type, which must not be dependent.
Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const;

enum ScalarTypeKind {
  STK_CPointer,
  STK_BlockPointer,
  STK_ObjCObjectPointer,
  STK_MemberPointer,
  STK_Bool,
  STK_Integral,
  STK_Floating,
  STK_IntegralComplex,
  STK_FloatingComplex,
  STK_FixedPoint
};

/// Given that this is a scalar type, classify it.
ScalarTypeKind getScalarTypeKind() const;

TypeDependence getDependence() const {
  return static_cast<TypeDependence>(TypeBits.Dependence);
}

/// Whether this type is an error type.
bool containsErrors() const {
  return getDependence() & TypeDependence::Error;
}

/// Whether this type is a dependent type, meaning that its definition
/// somehow depends on a template parameter (C++ [temp.dep.type]).
bool isDependentType() const {
  return getDependence() & TypeDependence::Dependent;
}

/// Determine whether this type is an instantiation-dependent type,
/// meaning that the type involves a template parameter (even if the
/// definition does not actually depend on the type substituted for that
/// template parameter).
bool isInstantiationDependentType() const {
  return getDependence() & TypeDependence::Instantiation;
}

/// Determine whether this type is an undeduced type, meaning that
/// it somehow involves a C++11 'auto' type or similar which has not yet been
/// deduced.
bool isUndeducedType() const;

/// Whether this type is a variably-modified type (C99 6.7.5).
bool isVariablyModifiedType() const {
  return getDependence() & TypeDependence::VariablyModified;
}

/// Whether this type involves a variable-length array type
/// with a definite size.
bool hasSizedVLAType() const;

/// Whether this type is or contains a local or unnamed type.
bool hasUnnamedOrLocalType() const;

bool isOverloadableType() const;

/// Determine wither this type is a C++ elaborated-type-specifier.
bool isElaboratedTypeSpecifier() const;

bool canDecayToPointerType() const;

/// Whether this type is represented natively as a pointer.  This includes
/// pointers, references, block pointers, and Objective-C interface,
/// qualified id, and qualified interface types, as well as nullptr_t.
bool hasPointerRepresentation() const;

/// Whether this type can represent an objective pointer type for the
/// purpose of GC'ability
bool hasObjCPointerRepresentation() const;

/// Determine whether this type has an integer representation
/// of some sort, e.g., it is an integer type or a vector.
bool hasIntegerRepresentation() const;

/// Determine whether this type has an signed integer representation
/// of some sort, e.g., it is an signed integer type or a vector.
bool hasSignedIntegerRepresentation() const;

/// Determine whether this type has an unsigned integer representation
/// of some sort, e.g., it is an unsigned integer type or a vector.
bool hasUnsignedIntegerRepresentation() const;

/// Determine whether this type has a floating-point representation
/// of some sort, e.g., it is a floating-point type or a vector thereof.
bool hasFloatingRepresentation() const;

// Type Checking Functions: Check to see if this type is structurally the
// specified type, ignoring typedefs and qualifiers, and return a pointer to
// the best type we can.
const RecordType *getAsStructureType() const;
/// NOTE: getAs*ArrayType are methods on ASTContext.
const RecordType *getAsUnionType() const;
const ComplexType *getAsComplexIntegerType() const; // GCC complex int type.
const ObjCObjectType *getAsObjCInterfaceType() const;

// The following is a convenience method that returns an ObjCObjectPointerType
// for object declared using an interface.
const ObjCObjectPointerType *getAsObjCInterfacePointerType() const;
const ObjCObjectPointerType *getAsObjCQualifiedIdType() const;
const ObjCObjectPointerType *getAsObjCQualifiedClassType() const;
const ObjCObjectType *getAsObjCQualifiedInterfaceType() const;

/// Retrieves the CXXRecordDecl that this type refers to, either
/// because the type is a RecordType or because it is the injected-class-name
/// type of a class template or class template partial specialization.
CXXRecordDecl *getAsCXXRecordDecl() const;

/// Retrieves the RecordDecl this type refers to.
RecordDecl *getAsRecordDecl() const;

/// Retrieves the TagDecl that this type refers to, either
/// because the type is a TagType or because it is the injected-class-name
/// type of a class template or class template partial specialization.
TagDecl *getAsTagDecl() const;

/// If this is a pointer or reference to a RecordType, return the
/// CXXRecordDecl that the type refers to.
///
/// If this is not a pointer or reference, or the type being pointed to does
/// not refer to a CXXRecordDecl, returns NULL.
const CXXRecordDecl *getPointeeCXXRecordDecl() const;

/// Get the DeducedType whose type will be deduced for a variable with
/// an initializer of this type. This looks through declarators like pointer
/// types, but not through decltype or typedefs.
DeducedType *getContainedDeducedType() const;

/// Get the AutoType whose type will be deduced for a variable with
/// an initializer of this type. This looks through declarators like pointer
/// types, but not through decltype or typedefs.
AutoType *getContainedAutoType() const {
  return dyn_cast_or_null<AutoType>(getContainedDeducedType());
}

/// Determine whether this type was written with a leading 'auto'
/// corresponding to a trailing return type (possibly for a nested
/// function type within a pointer to function type or similar).
bool hasAutoForTrailingReturnType() const;

/// Member-template getAs<specific type>'.  Look through sugar for
/// an instance of \<specific type>.   This scheme will eventually
/// replace the specific getAsXXXX methods above.
///
/// There are some specializations of this member template listed
/// immediately following this class.
template <typename T> const T *getAs() const;

/// Member-template getAsAdjusted<specific type>. Look through specific kinds
/// of sugar (parens, attributes, etc) for an instance of \<specific type>.
/// This is used when you need to walk over sugar nodes that represent some
/// kind of type adjustment from a type that was written as a \<specific type>
/// to another type that is still canonically a \<specific type>.
template <typename T> const T *getAsAdjusted() const;

/// A variant of getAs<> for array types which silently discards
/// qualifiers from the outermost type.
const ArrayType *getAsArrayTypeUnsafe() const;

/// Member-template castAs<specific type>.  Look through sugar for
/// the underlying instance of \<specific type>.
///
/// This method has the same relationship to getAs<T> as cast<T> has
/// to dyn_cast<T>; which is to say, the underlying type *must*
/// have the intended type, and this method will never return null.
template <typename T> const T *castAs() const;

/// A variant of castAs<> for array type which silently discards
/// qualifiers from the outermost type.
const ArrayType *castAsArrayTypeUnsafe() const;

/// Determine whether this type had the specified attribute applied to it
/// (looking through top-level type sugar).
bool hasAttr(attr::Kind AK) const;

/// Get the base element type of this type, potentially discarding type
/// qualifiers.  This should never be used when type qualifiers
/// are meaningful.
const Type *getBaseElementTypeUnsafe() const;

/// If this is an array type, return the element type of the array,
/// potentially with type qualifiers missing.
/// This should never be used when type qualifiers are meaningful.
const Type *getArrayElementTypeNoTypeQual() const;

/// If this is a pointer type, return the pointee type.
/// If this is an array type, return the array element type.
/// This should never be used when type qualifiers are meaningful.
const Type *getPointeeOrArrayElementType() const;

/// If this is a pointer, ObjC object pointer, or block
/// pointer, this returns the respective pointee.
QualType getPointeeType() const;

/// Return the specified type with any "sugar" removed from the type,
/// removing any typedefs, typeofs, etc., as well as any qualifiers.
const Type *getUnqualifiedDesugaredType() const;

/// More type predicates useful for type checking/promotion
bool isPromotableIntegerType() const; // C99 6.3.1.1p2

/// Return true if this is an integer type that is
/// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..],
/// or an enum decl which has a signed representation.
bool isSignedIntegerType() const;

/// Return true if this is an integer type that is
/// unsigned, according to C99 6.2.5p6 [which returns true for _Bool],
/// or an enum decl which has an unsigned representation.
bool isUnsignedIntegerType() const;

/// Determines whether this is an integer type that is signed or an
/// enumeration types whose underlying type is a signed integer type.
bool isSignedIntegerOrEnumerationType() const;

/// Determines whether this is an integer type that is unsigned or an
/// enumeration types whose underlying type is a unsigned integer type.
bool isUnsignedIntegerOrEnumerationType() const;

/// Return true if this is a fixed point type according to
/// ISO/IEC JTC1 SC22 WG14 N1169.
bool isFixedPointType() const;

/// Return true if this is a fixed point or integer type.
bool isFixedPointOrIntegerType() const;

/// Return true if this is a saturated fixed point type according to
/// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned.
bool isSaturatedFixedPointType() const;

/// Return true if this is a saturated fixed point type according to
/// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned.
bool isUnsaturatedFixedPointType() const;

/// Return true if this is a fixed point type that is signed according
/// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated.
bool isSignedFixedPointType() const;

/// Return true if this is a fixed point type that is unsigned according
/// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated.
bool isUnsignedFixedPointType() const;

/// Return true if this is not a variable sized type,
/// according to the rules of C99 6.7.5p3.  It is not legal to call this on
/// incomplete types.
bool isConstantSizeType() const;

/// Returns true if this type can be represented by some
/// set of type specifiers.
bool isSpecifierType() const;

/// Determine the linkage of this type.
Linkage getLinkage() const;

/// Determine the visibility of this type.
Visibility getVisibility() const {
  return getLinkageAndVisibility().getVisibility();
}

/// Return true if the visibility was explicitly set is the code.
bool isVisibilityExplicit() const {
  return getLinkageAndVisibility().isVisibilityExplicit();
}

/// Determine the linkage and visibility of this type.
LinkageInfo getLinkageAndVisibility() const;

/// True if the computed linkage is valid. Used for consistency
/// checking. Should always return true.
bool isLinkageValid() const;

/// Determine the nullability of the given type.
///
/// Note that nullability is only captured as sugar within the type
/// system, not as part of the canonical type, so nullability will
/// be lost by canonicalization and desugaring.
Optional<NullabilityKind> getNullability(const ASTContext &context) const;

/// Determine whether the given type can have a nullability
/// specifier applied to it, i.e., if it is any kind of pointer type.
///
/// \param ResultIfUnknown The value to return if we don't yet know whether
///        this type can have nullability because it is dependent.
bool canHaveNullability(bool ResultIfUnknown = true) const;

/// Retrieve the set of substitutions required when accessing a member
/// of the Objective-C receiver type that is declared in the given context.
///
/// \c *this is the type of the object we're operating on, e.g., the
/// receiver for a message send or the base of a property access, and is
/// expected to be of some object or object pointer type.
///
/// \param dc The declaration context for which we are building up a
/// substitution mapping, which should be an Objective-C class, extension,
/// category, or method within.
///
/// \returns an array of type arguments that can be substituted for
/// the type parameters of the given declaration context in any type described
/// within that context, or an empty optional to indicate that no
/// substitution is required.
Optional<ArrayRef<QualType>>
getObjCSubstitutions(const DeclContext *dc) const;

/// Determines if this is an ObjC interface type that may accept type
/// parameters.
bool acceptsObjCTypeParams() const;

const char *getTypeClassName() const;

QualType getCanonicalTypeInternal() const {
  return CanonicalType;
}

CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h
void dump() const;
void dump(llvm::raw_ostream &OS, const ASTContext &Context) const;
2458};

2460/// This will check for a TypedefType by removing any existing sugar
2461/// until it reaches a TypedefType or a non-sugared type.
2462template <> const TypedefType *Type::getAs() const;

2464/// This will check for a TemplateSpecializationType by removing any
2465/// existing sugar until it reaches a TemplateSpecializationType or a
2466/// non-sugared type.
2467template <> const TemplateSpecializationType *Type::getAs() const;

2469/// This will check for an AttributedType by removing any existing sugar
2470/// until it reaches an AttributedType or a non-sugared type.
2471template <> const AttributedType *Type::getAs() const;

2473// We can do canonical leaf types faster, because we don't have to
2474// worry about preserving child type decoration.
2475#define TYPE(Class, Base)
2476#define LEAF_TYPE(Class) \
2477template <> inline const Class##Type *Type::getAs() const { \
return dyn_cast<Class##Type>(CanonicalType); \
2479} \
2480template <> inline const Class##Type *Type::castAs() const { \
return cast<Class##Type>(CanonicalType); \
2482}
2483#include "clang/AST/TypeNodes.inc"

2485/// This class is used for builtin types like 'int'.  Builtin
2486/// types are always canonical and have a literal name field.
2487class BuiltinType : public Type {
2488public:
enum Kind {
2490// OpenCL image types
2491#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) Id,
2492#include "clang/Basic/OpenCLImageTypes.def"
2493// OpenCL extension types
2494#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) Id,
2495#include "clang/Basic/OpenCLExtensionTypes.def"
2496// SVE Types
2497#define SVE_TYPE(Name, Id, SingletonId) Id,
2498#include "clang/Basic/AArch64SVEACLETypes.def"
2499// PPC MMA Types
2500#define PPC_VECTOR_TYPE(Name, Id, Size) Id,
2501#include "clang/Basic/PPCTypes.def"
2502// RVV Types
2503#define RVV_TYPE(Name, Id, SingletonId) Id,
2504#include "clang/Basic/RISCVVTypes.def"
2505// All other builtin types
2506#define BUILTIN_TYPE(Id, SingletonId) Id,
2507#define LAST_BUILTIN_TYPE(Id) LastKind = Id
2508#include "clang/AST/BuiltinTypes.def"
};

2511private:
friend class ASTContext; // ASTContext creates these.

BuiltinType(Kind K)
    : Type(Builtin, QualType(),
           K == Dependent ? TypeDependence::DependentInstantiation
                          : TypeDependence::None) {
  BuiltinTypeBits.Kind = K;
}

2521public:
Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); }
StringRef getName(const PrintingPolicy &Policy) const;

const char *getNameAsCString(const PrintingPolicy &Policy) const {
  // The StringRef is null-terminated.
  StringRef str = getName(Policy);
  assert(!str.empty() && str.data()[str.size()] == '\0')((void)0);
  return str.data();
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

bool isInteger() const {
  return getKind() >= Bool && getKind() <= Int128;
}

bool isSignedInteger() const {
  return getKind() >= Char_S && getKind() <= Int128;
}

bool isUnsignedInteger() const {
  return getKind() >= Bool && getKind() <= UInt128;
}

bool isFloatingPoint() const {
  return getKind() >= Half && getKind() <= Float128;
}

/// Determines whether the given kind corresponds to a placeholder type.
static bool isPlaceholderTypeKind(Kind K) {
  return K >= Overload;
}

/// Determines whether this type is a placeholder type, i.e. a type
/// which cannot appear in arbitrary positions in a fully-formed
/// expression.
bool isPlaceholderType() const {
  return isPlaceholderTypeKind(getKind());
}

/// Determines whether this type is a placeholder type other than
/// Overload.  Most placeholder types require only syntactic
/// information about their context in order to be resolved (e.g.
/// whether it is a call expression), which means they can (and
/// should) be resolved in an earlier "phase" of analysis.
/// Overload expressions sometimes pick up further information
/// from their context, like whether the context expects a
/// specific function-pointer type, and so frequently need
/// special treatment.
bool isNonOverloadPlaceholderType() const {
  return getKind() > Overload;
}

static bool classof(const Type *T) { return T->getTypeClass() == Builtin; }
2577};

2579/// Complex values, per C99 6.2.5p11.  This supports the C99 complex
2580/// types (_Complex float etc) as well as the GCC integer complex extensions.
2581class ComplexType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType ElementType;

ComplexType(QualType Element, QualType CanonicalPtr)
    : Type(Complex, CanonicalPtr, Element->getDependence()),
      ElementType(Element) {}

2590public:
QualType getElementType() const { return ElementType; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getElementType());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) {
  ID.AddPointer(Element.getAsOpaquePtr());
}

static bool classof(const Type *T) { return T->getTypeClass() == Complex; }
2605};

2607/// Sugar for parentheses used when specifying types.
2608class ParenType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType Inner;

ParenType(QualType InnerType, QualType CanonType)
    : Type(Paren, CanonType, InnerType->getDependence()), Inner(InnerType) {}

2616public:
QualType getInnerType() const { return Inner; }

bool isSugared() const { return true; }
QualType desugar() const { return getInnerType(); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getInnerType());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) {
  Inner.Profile(ID);
}

static bool classof(const Type *T) { return T->getTypeClass() == Paren; }
2631};

2633/// PointerType - C99 6.7.5.1 - Pointer Declarators.
2634class PointerType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType PointeeType;

PointerType(QualType Pointee, QualType CanonicalPtr)
    : Type(Pointer, CanonicalPtr, Pointee->getDependence()),
      PointeeType(Pointee) {}

2643public:
QualType getPointeeType() const { return PointeeType; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getPointeeType());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) {
  ID.AddPointer(Pointee.getAsOpaquePtr());
}

static bool classof(const Type *T) { return T->getTypeClass() == Pointer; }
2658};

2660/// Represents a type which was implicitly adjusted by the semantic
2661/// engine for arbitrary reasons.  For example, array and function types can
2662/// decay, and function types can have their calling conventions adjusted.
2663class AdjustedType : public Type, public llvm::FoldingSetNode {
QualType OriginalTy;
QualType AdjustedTy;

2667protected:
friend class ASTContext; // ASTContext creates these.

AdjustedType(TypeClass TC, QualType OriginalTy, QualType AdjustedTy,
             QualType CanonicalPtr)
    : Type(TC, CanonicalPtr, OriginalTy->getDependence()),
      OriginalTy(OriginalTy), AdjustedTy(AdjustedTy) {}

2675public:
QualType getOriginalType() const { return OriginalTy; }
QualType getAdjustedType() const { return AdjustedTy; }

bool isSugared() const { return true; }
QualType desugar() const { return AdjustedTy; }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, OriginalTy, AdjustedTy);
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Orig, QualType New) {
  ID.AddPointer(Orig.getAsOpaquePtr());
  ID.AddPointer(New.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Adjusted || T->getTypeClass() == Decayed;
}
2694};

2696/// Represents a pointer type decayed from an array or function type.
2697class DecayedType : public AdjustedType {
friend class ASTContext; // ASTContext creates these.

inline
DecayedType(QualType OriginalType, QualType Decayed, QualType Canonical);

2703public:
QualType getDecayedType() const { return getAdjustedType(); }

inline QualType getPointeeType() const;

static bool classof(const Type *T) { return T->getTypeClass() == Decayed; }
2709};

2711/// Pointer to a block type.
2712/// This type is to represent types syntactically represented as
2713/// "void (^)(int)", etc. Pointee is required to always be a function type.
2714class BlockPointerType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

// Block is some kind of pointer type
QualType PointeeType;

BlockPointerType(QualType Pointee, QualType CanonicalCls)
    : Type(BlockPointer, CanonicalCls, Pointee->getDependence()),
      PointeeType(Pointee) {}

2724public:
// Get the pointee type. Pointee is required to always be a function type.
QualType getPointeeType() const { return PointeeType; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
    Profile(ID, getPointeeType());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) {
    ID.AddPointer(Pointee.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == BlockPointer;
}
2742};

2744/// Base for LValueReferenceType and RValueReferenceType
2745class ReferenceType : public Type, public llvm::FoldingSetNode {
QualType PointeeType;

2748protected:
ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef,
              bool SpelledAsLValue)
    : Type(tc, CanonicalRef, Referencee->getDependence()),
      PointeeType(Referencee) {
  ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue;
  ReferenceTypeBits.InnerRef = Referencee->isReferenceType();
}

2757public:
bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; }
bool isInnerRef() const { return ReferenceTypeBits.InnerRef; }

QualType getPointeeTypeAsWritten() const { return PointeeType; }

QualType getPointeeType() const {
  // FIXME: this might strip inner qualifiers; okay?
  const ReferenceType *T = this;
  while (T->isInnerRef())
    T = T->PointeeType->castAs<ReferenceType>();
  return T->PointeeType;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, PointeeType, isSpelledAsLValue());
}

static void Profile(llvm::FoldingSetNodeID &ID,
                    QualType Referencee,
                    bool SpelledAsLValue) {
  ID.AddPointer(Referencee.getAsOpaquePtr());
  ID.AddBoolean(SpelledAsLValue);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == LValueReference ||
         T->getTypeClass() == RValueReference;
}
2786};

2788/// An lvalue reference type, per C++11 [dcl.ref].
2789class LValueReferenceType : public ReferenceType {
friend class ASTContext; // ASTContext creates these

LValueReferenceType(QualType Referencee, QualType CanonicalRef,
                    bool SpelledAsLValue)
    : ReferenceType(LValueReference, Referencee, CanonicalRef,
                    SpelledAsLValue) {}

2797public:
bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == LValueReference;
}
2804};

2806/// An rvalue reference type, per C++11 [dcl.ref].
2807class RValueReferenceType : public ReferenceType {
friend class ASTContext; // ASTContext creates these

RValueReferenceType(QualType Referencee, QualType CanonicalRef)
     : ReferenceType(RValueReference, Referencee, CanonicalRef, false) {}

2813public:
bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == RValueReference;
}
2820};

2822/// A pointer to member type per C++ 8.3.3 - Pointers to members.
2823///
2824/// This includes both pointers to data members and pointer to member functions.
2825class MemberPointerType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType PointeeType;

/// The class of which the pointee is a member. Must ultimately be a
/// RecordType, but could be a typedef or a template parameter too.
const Type *Class;

MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr)
    : Type(MemberPointer, CanonicalPtr,
           (Cls->getDependence() & ~TypeDependence::VariablyModified) |
               Pointee->getDependence()),
      PointeeType(Pointee), Class(Cls) {}

2840public:
QualType getPointeeType() const { return PointeeType; }

/// Returns true if the member type (i.e. the pointee type) is a
/// function type rather than a data-member type.
bool isMemberFunctionPointer() const {
  return PointeeType->isFunctionProtoType();
}

/// Returns true if the member type (i.e. the pointee type) is a
/// data type rather than a function type.
bool isMemberDataPointer() const {
  return !PointeeType->isFunctionProtoType();
}

const Type *getClass() const { return Class; }
CXXRecordDecl *getMostRecentCXXRecordDecl() const;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getPointeeType(), getClass());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee,
                    const Type *Class) {
  ID.AddPointer(Pointee.getAsOpaquePtr());
  ID.AddPointer(Class);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == MemberPointer;
}
2874};

2876/// Represents an array type, per C99 6.7.5.2 - Array Declarators.
2877class ArrayType : public Type, public llvm::FoldingSetNode {
2878public:
/// Capture whether this is a normal array (e.g. int X[4])
/// an array with a static size (e.g. int X[static 4]), or an array
/// with a star size (e.g. int X[*]).
/// 'static' is only allowed on function parameters.
enum ArraySizeModifier {
  Normal, Static, Star
};

2887private:
/// The element type of the array.
QualType ElementType;

2891protected:
friend class ASTContext; // ASTContext creates these.

ArrayType(TypeClass tc, QualType et, QualType can, ArraySizeModifier sm,
          unsigned tq, const Expr *sz = nullptr);

2897public:
QualType getElementType() const { return ElementType; }

ArraySizeModifier getSizeModifier() const {
  return ArraySizeModifier(ArrayTypeBits.SizeModifier);
}

Qualifiers getIndexTypeQualifiers() const {
  return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers());
}

unsigned getIndexTypeCVRQualifiers() const {
  return ArrayTypeBits.IndexTypeQuals;
}

static bool classof(const Type *T) {
  return T->getTypeClass() == ConstantArray ||
         T->getTypeClass() == VariableArray ||
         T->getTypeClass() == IncompleteArray ||
         T->getTypeClass() == DependentSizedArray;
}
2918};

2920/// Represents the canonical version of C arrays with a specified constant size.
2921/// For example, the canonical type for 'int A[4 + 4*100]' is a
2922/// ConstantArrayType where the element type is 'int' and the size is 404.
2923class ConstantArrayType final
  : public ArrayType,
    private llvm::TrailingObjects<ConstantArrayType, const Expr *> {
friend class ASTContext; // ASTContext creates these.
friend TrailingObjects;

llvm::APInt Size; // Allows us to unique the type.

ConstantArrayType(QualType et, QualType can, const llvm::APInt &size,
                  const Expr *sz, ArraySizeModifier sm, unsigned tq)
    : ArrayType(ConstantArray, et, can, sm, tq, sz), Size(size) {
  ConstantArrayTypeBits.HasStoredSizeExpr = sz != nullptr;
  if (ConstantArrayTypeBits.HasStoredSizeExpr) {
    assert(!can.isNull() && "canonical constant array should not have size")((void)0);
    *getTrailingObjects<const Expr*>() = sz;
  }
}

unsigned numTrailingObjects(OverloadToken<const Expr*>) const {
  return ConstantArrayTypeBits.HasStoredSizeExpr;
}

2945public:
const llvm::APInt &getSize() const { return Size; }
const Expr *getSizeExpr() const {
  return ConstantArrayTypeBits.HasStoredSizeExpr
             ? *getTrailingObjects<const Expr *>()
             : nullptr;
}
bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

/// Determine the number of bits required to address a member of
// an array with the given element type and number of elements.
static unsigned getNumAddressingBits(const ASTContext &Context,
                                     QualType ElementType,
                                     const llvm::APInt &NumElements);

/// Determine the maximum number of active bits that an array's size
/// can require, which limits the maximum size of the array.
static unsigned getMaxSizeBits(const ASTContext &Context);

void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) {
  Profile(ID, Ctx, getElementType(), getSize(), getSizeExpr(),
          getSizeModifier(), getIndexTypeCVRQualifiers());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx,
                    QualType ET, const llvm::APInt &ArraySize,
                    const Expr *SizeExpr, ArraySizeModifier SizeMod,
                    unsigned TypeQuals);

static bool classof(const Type *T) {
  return T->getTypeClass() == ConstantArray;
}
2978};

2980/// Represents a C array with an unspecified size.  For example 'int A[]' has
2981/// an IncompleteArrayType where the element type is 'int' and the size is
2982/// unspecified.
2983class IncompleteArrayType : public ArrayType {
friend class ASTContext; // ASTContext creates these.

IncompleteArrayType(QualType et, QualType can,
                    ArraySizeModifier sm, unsigned tq)
    : ArrayType(IncompleteArray, et, can, sm, tq) {}

2990public:
friend class StmtIteratorBase;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == IncompleteArray;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getElementType(), getSizeModifier(),
          getIndexTypeCVRQualifiers());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType ET,
                    ArraySizeModifier SizeMod, unsigned TypeQuals) {
  ID.AddPointer(ET.getAsOpaquePtr());
  ID.AddInteger(SizeMod);
  ID.AddInteger(TypeQuals);
}
3011};

3013/// Represents a C array with a specified size that is not an
3014/// integer-constant-expression.  For example, 'int s[x+foo()]'.
3015/// Since the size expression is an arbitrary expression, we store it as such.
3016///
3017/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and
3018/// should not be: two lexically equivalent variable array types could mean
3019/// different things, for example, these variables do not have the same type
3020/// dynamically:
3021///
3022/// void foo(int x) {
3023///   int Y[x];
3024///   ++x;
3025///   int Z[x];
3026/// }
3027class VariableArrayType : public ArrayType {
friend class ASTContext; // ASTContext creates these.

/// An assignment-expression. VLA's are only permitted within
/// a function block.
Stmt *SizeExpr;

/// The range spanned by the left and right array brackets.
SourceRange Brackets;

VariableArrayType(QualType et, QualType can, Expr *e,
                  ArraySizeModifier sm, unsigned tq,
                  SourceRange brackets)
    : ArrayType(VariableArray, et, can, sm, tq, e),
      SizeExpr((Stmt*) e), Brackets(brackets) {}

3043public:
friend class StmtIteratorBase;

Expr *getSizeExpr() const {
  // We use C-style casts instead of cast<> here because we do not wish
  // to have a dependency of Type.h on Stmt.h/Expr.h.
  return (Expr*) SizeExpr;
}

SourceRange getBracketsRange() const { return Brackets; }
SourceLocation getLBracketLoc() const { return Brackets.getBegin(); }
SourceLocation getRBracketLoc() const { return Brackets.getEnd(); }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == VariableArray;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  llvm_unreachable("Cannot unique VariableArrayTypes.")__builtin_unreachable();
}
3066};

3068/// Represents an array type in C++ whose size is a value-dependent expression.
3069///
3070/// For example:
3071/// \code
3072/// template<typename T, int Size>
3073/// class array {
3074///   T data[Size];
3075/// };
3076/// \endcode
3077///
3078/// For these types, we won't actually know what the array bound is
3079/// until template instantiation occurs, at which point this will
3080/// become either a ConstantArrayType or a VariableArrayType.
3081class DependentSizedArrayType : public ArrayType {
friend class ASTContext; // ASTContext creates these.

const ASTContext &Context;

/// An assignment expression that will instantiate to the
/// size of the array.
///
/// The expression itself might be null, in which case the array
/// type will have its size deduced from an initializer.
Stmt *SizeExpr;

/// The range spanned by the left and right array brackets.
SourceRange Brackets;

DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can,
                        Expr *e, ArraySizeModifier sm, unsigned tq,
                        SourceRange brackets);

3100public:
friend class StmtIteratorBase;

Expr *getSizeExpr() const {
  // We use C-style casts instead of cast<> here because we do not wish
  // to have a dependency of Type.h on Stmt.h/Expr.h.
  return (Expr*) SizeExpr;
}

SourceRange getBracketsRange() const { return Brackets; }
SourceLocation getLBracketLoc() const { return Brackets.getBegin(); }
SourceLocation getRBracketLoc() const { return Brackets.getEnd(); }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentSizedArray;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getElementType(),
          getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    QualType ET, ArraySizeModifier SizeMod,
                    unsigned TypeQuals, Expr *E);
3128};

3130/// Represents an extended address space qualifier where the input address space
3131/// value is dependent. Non-dependent address spaces are not represented with a
3132/// special Type subclass; they are stored on an ExtQuals node as part of a QualType.
3133///
3134/// For example:
3135/// \code
3136/// template<typename T, int AddrSpace>
3137/// class AddressSpace {
3138///   typedef T __attribute__((address_space(AddrSpace))) type;
3139/// }
3140/// \endcode
3141class DependentAddressSpaceType : public Type, public llvm::FoldingSetNode {
friend class ASTContext;

const ASTContext &Context;
Expr *AddrSpaceExpr;
QualType PointeeType;
SourceLocation loc;

DependentAddressSpaceType(const ASTContext &Context, QualType PointeeType,
                          QualType can, Expr *AddrSpaceExpr,
                          SourceLocation loc);

3153public:
Expr *getAddrSpaceExpr() const { return AddrSpaceExpr; }
QualType getPointeeType() const { return PointeeType; }
SourceLocation getAttributeLoc() const { return loc; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentAddressSpace;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getPointeeType(), getAddrSpaceExpr());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    QualType PointeeType, Expr *AddrSpaceExpr);
3171};

3173/// Represents an extended vector type where either the type or size is
3174/// dependent.
3175///
3176/// For example:
3177/// \code
3178/// template<typename T, int Size>
3179/// class vector {
3180///   typedef T __attribute__((ext_vector_type(Size))) type;
3181/// }
3182/// \endcode
3183class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode {
friend class ASTContext;

const ASTContext &Context;
Expr *SizeExpr;

/// The element type of the array.
QualType ElementType;

SourceLocation loc;

DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType,
                            QualType can, Expr *SizeExpr, SourceLocation loc);

3197public:
Expr *getSizeExpr() const { return SizeExpr; }
QualType getElementType() const { return ElementType; }
SourceLocation getAttributeLoc() const { return loc; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentSizedExtVector;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getElementType(), getSizeExpr());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    QualType ElementType, Expr *SizeExpr);
3215};


3218/// Represents a GCC generic vector type. This type is created using
3219/// __attribute__((vector_size(n)), where "n" specifies the vector size in
3220/// bytes; or from an Altivec __vector or vector declaration.
3221/// Since the constructor takes the number of vector elements, the
3222/// client is responsible for converting the size into the number of elements.
3223class VectorType : public Type, public llvm::FoldingSetNode {
3224public:
enum VectorKind {
  /// not a target-specific vector type
  GenericVector,

  /// is AltiVec vector
  AltiVecVector,

  /// is AltiVec 'vector Pixel'
  AltiVecPixel,

  /// is AltiVec 'vector bool ...'
  AltiVecBool,

  /// is ARM Neon vector
  NeonVector,

  /// is ARM Neon polynomial vector
  NeonPolyVector,

  /// is AArch64 SVE fixed-length data vector
  SveFixedLengthDataVector,

  /// is AArch64 SVE fixed-length predicate vector
  SveFixedLengthPredicateVector
};

3251protected:
friend class ASTContext; // ASTContext creates these.

/// The element type of the vector.
QualType ElementType;

VectorType(QualType vecType, unsigned nElements, QualType canonType,
           VectorKind vecKind);

VectorType(TypeClass tc, QualType vecType, unsigned nElements,
           QualType canonType, VectorKind vecKind);

3263public:
QualType getElementType() const { return ElementType; }
unsigned getNumElements() const { return VectorTypeBits.NumElements; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

VectorKind getVectorKind() const {
  return VectorKind(VectorTypeBits.VecKind);
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getElementType(), getNumElements(),
          getTypeClass(), getVectorKind());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType,
                    unsigned NumElements, TypeClass TypeClass,
                    VectorKind VecKind) {
  ID.AddPointer(ElementType.getAsOpaquePtr());
  ID.AddInteger(NumElements);
  ID.AddInteger(TypeClass);
  ID.AddInteger(VecKind);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector;
}
3291};

3293/// Represents a vector type where either the type or size is dependent.
3294////
3295/// For example:
3296/// \code
3297/// template<typename T, int Size>
3298/// class vector {
3299///   typedef T __attribute__((vector_size(Size))) type;
3300/// }
3301/// \endcode
3302class DependentVectorType : public Type, public llvm::FoldingSetNode {
friend class ASTContext;

const ASTContext &Context;
QualType ElementType;
Expr *SizeExpr;
SourceLocation Loc;

DependentVectorType(const ASTContext &Context, QualType ElementType,
                         QualType CanonType, Expr *SizeExpr,
                         SourceLocation Loc, VectorType::VectorKind vecKind);

3314public:
Expr *getSizeExpr() const { return SizeExpr; }
QualType getElementType() const { return ElementType; }
SourceLocation getAttributeLoc() const { return Loc; }
VectorType::VectorKind getVectorKind() const {
  return VectorType::VectorKind(VectorTypeBits.VecKind);
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentVector;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getElementType(), getSizeExpr(), getVectorKind());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    QualType ElementType, const Expr *SizeExpr,
                    VectorType::VectorKind VecKind);
3336};

3338/// ExtVectorType - Extended vector type. This type is created using
3339/// __attribute__((ext_vector_type(n)), where "n" is the number of elements.
3340/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This
3341/// class enables syntactic extensions, like Vector Components for accessing
3342/// points (as .xyzw), colors (as .rgba), and textures (modeled after OpenGL
3343/// Shading Language).
3344class ExtVectorType : public VectorType {
friend class ASTContext; // ASTContext creates these.

ExtVectorType(QualType vecType, unsigned nElements, QualType canonType)
    : VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {}

3350public:
static int getPointAccessorIdx(char c) {
  switch (c) {
  default: return -1;
  case 'x': case 'r': return 0;
  case 'y': case 'g': return 1;
  case 'z': case 'b': return 2;
  case 'w': case 'a': return 3;
  }
}

static int getNumericAccessorIdx(char c) {
  switch (c) {
    default: return -1;
    case '0': return 0;
    case '1': return 1;
    case '2': return 2;
    case '3': return 3;
    case '4': return 4;
    case '5': return 5;
    case '6': return 6;
    case '7': return 7;
    case '8': return 8;
    case '9': return 9;
    case 'A':
    case 'a': return 10;
    case 'B':
    case 'b': return 11;
    case 'C':
    case 'c': return 12;
    case 'D':
    case 'd': return 13;
    case 'E':
    case 'e': return 14;
    case 'F':
    case 'f': return 15;
  }
}

static int getAccessorIdx(char c, bool isNumericAccessor) {
  if (isNumericAccessor)
    return getNumericAccessorIdx(c);
  else
    return getPointAccessorIdx(c);
}

bool isAccessorWithinNumElements(char c, bool isNumericAccessor) const {
  if (int idx = getAccessorIdx(c, isNumericAccessor)+1)
    return unsigned(idx-1) < getNumElements();
  return false;
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == ExtVector;
}
3408};

3410/// Represents a matrix type, as defined in the Matrix Types clang extensions.
3411/// __attribute__((matrix_type(rows, columns))), where "rows" specifies
3412/// number of rows and "columns" specifies the number of columns.
3413class MatrixType : public Type, public llvm::FoldingSetNode {
3414protected:
friend class ASTContext;

/// The element type of the matrix.
QualType ElementType;

MatrixType(QualType ElementTy, QualType CanonElementTy);

MatrixType(TypeClass TypeClass, QualType ElementTy, QualType CanonElementTy,
           const Expr *RowExpr = nullptr, const Expr *ColumnExpr = nullptr);

3425public:
/// Returns type of the elements being stored in the matrix
QualType getElementType() const { return ElementType; }

/// Valid elements types are the following:
/// * an integer type (as in C2x 6.2.5p19), but excluding enumerated types
///   and _Bool
/// * the standard floating types float or double
/// * a half-precision floating point type, if one is supported on the target
static bool isValidElementType(QualType T) {
  return T->isDependentType() ||
         (T->isRealType() && !T->isBooleanType() && !T->isEnumeralType());
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == ConstantMatrix ||
         T->getTypeClass() == DependentSizedMatrix;
}
3446};

3448/// Represents a concrete matrix type with constant number of rows and columns
3449class ConstantMatrixType final : public MatrixType {
3450protected:
friend class ASTContext;

/// The element type of the matrix.
// FIXME: Appears to be unused? There is also MatrixType::ElementType...
QualType ElementType;

/// Number of rows and columns.
unsigned NumRows;
unsigned NumColumns;

static constexpr unsigned MaxElementsPerDimension = (1 << 20) - 1;

ConstantMatrixType(QualType MatrixElementType, unsigned NRows,
                   unsigned NColumns, QualType CanonElementType);

ConstantMatrixType(TypeClass typeClass, QualType MatrixType, unsigned NRows,
                   unsigned NColumns, QualType CanonElementType);

3469public:
/// Returns the number of rows in the matrix.
unsigned getNumRows() const { return NumRows; }

/// Returns the number of columns in the matrix.
unsigned getNumColumns() const { return NumColumns; }

/// Returns the number of elements required to embed the matrix into a vector.
unsigned getNumElementsFlattened() const {
  return getNumRows() * getNumColumns();
}

/// Returns true if \p NumElements is a valid matrix dimension.
static constexpr bool isDimensionValid(size_t NumElements) {
  return NumElements > 0 && NumElements <= MaxElementsPerDimension;
}

/// Returns the maximum number of elements per dimension.
static constexpr unsigned getMaxElementsPerDimension() {
  return MaxElementsPerDimension;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getElementType(), getNumRows(), getNumColumns(),
          getTypeClass());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType,
                    unsigned NumRows, unsigned NumColumns,
                    TypeClass TypeClass) {
  ID.AddPointer(ElementType.getAsOpaquePtr());
  ID.AddInteger(NumRows);
  ID.AddInteger(NumColumns);
  ID.AddInteger(TypeClass);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == ConstantMatrix;
}
3508};

3510/// Represents a matrix type where the type and the number of rows and columns
3511/// is dependent on a template.
3512class DependentSizedMatrixType final : public MatrixType {
friend class ASTContext;

const ASTContext &Context;
Expr *RowExpr;
Expr *ColumnExpr;

SourceLocation loc;

DependentSizedMatrixType(const ASTContext &Context, QualType ElementType,
                         QualType CanonicalType, Expr *RowExpr,
                         Expr *ColumnExpr, SourceLocation loc);

3525public:
QualType getElementType() const { return ElementType; }
Expr *getRowExpr() const { return RowExpr; }
Expr *getColumnExpr() const { return ColumnExpr; }
SourceLocation getAttributeLoc() const { return loc; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentSizedMatrix;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getElementType(), getRowExpr(), getColumnExpr());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    QualType ElementType, Expr *RowExpr, Expr *ColumnExpr);
3544};

3546/// FunctionType - C99 6.7.5.3 - Function Declarators.  This is the common base
3547/// class of FunctionNoProtoType and FunctionProtoType.
3548class FunctionType : public Type {
// The type returned by the function.
QualType ResultType;

3552public:
/// Interesting information about a specific parameter that can't simply
/// be reflected in parameter's type. This is only used by FunctionProtoType
/// but is in FunctionType to make this class available during the
/// specification of the bases of FunctionProtoType.
///
/// It makes sense to model language features this way when there's some
/// sort of parameter-specific override (such as an attribute) that
/// affects how the function is called.  For example, the ARC ns_consumed
/// attribute changes whether a parameter is passed at +0 (the default)
/// or +1 (ns_consumed).  This must be reflected in the function type,
/// but isn't really a change to the parameter type.
///
/// One serious disadvantage of modelling language features this way is
/// that they generally do not work with language features that attempt
/// to destructure types.  For example, template argument deduction will
/// not be able to match a parameter declared as
///   T (*)(U)
/// against an argument of type
///   void (*)(__attribute__((ns_consumed)) id)
/// because the substitution of T=void, U=id into the former will
/// not produce the latter.
class ExtParameterInfo {
  enum {
    ABIMask = 0x0F,
    IsConsumed = 0x10,
    HasPassObjSize = 0x20,
    IsNoEscape = 0x40,
  };
  unsigned char Data = 0;

public:
  ExtParameterInfo() = default;

  /// Return the ABI treatment of this parameter.
  ParameterABI getABI() const { return ParameterABI(Data & ABIMask); }
  ExtParameterInfo withABI(ParameterABI kind) const {
    ExtParameterInfo copy = *this;
    copy.Data = (copy.Data & ~ABIMask) | unsigned(kind);
    return copy;
  }

  /// Is this parameter considered "consumed" by Objective-C ARC?
  /// Consumed parameters must have retainable object type.
  bool isConsumed() const { return (Data & IsConsumed); }
  ExtParameterInfo withIsConsumed(bool consumed) const {
    ExtParameterInfo copy = *this;
    if (consumed)
      copy.Data |= IsConsumed;
    else
      copy.Data &= ~IsConsumed;
    return copy;
  }

  bool hasPassObjectSize() const { return Data & HasPassObjSize; }
  ExtParameterInfo withHasPassObjectSize() const {
    ExtParameterInfo Copy = *this;
    Copy.Data |= HasPassObjSize;
    return Copy;
  }

  bool isNoEscape() const { return Data & IsNoEscape; }
  ExtParameterInfo withIsNoEscape(bool NoEscape) const {
    ExtParameterInfo Copy = *this;
    if (NoEscape)
      Copy.Data |= IsNoEscape;
    else
      Copy.Data &= ~IsNoEscape;
    return Copy;
  }

  unsigned char getOpaqueValue() const { return Data; }
  static ExtParameterInfo getFromOpaqueValue(unsigned char data) {
    ExtParameterInfo result;
    result.Data = data;
    return result;
  }

  friend bool operator==(ExtParameterInfo lhs, ExtParameterInfo rhs) {
    return lhs.Data == rhs.Data;
  }

  friend bool operator!=(ExtParameterInfo lhs, ExtParameterInfo rhs) {
    return lhs.Data != rhs.Data;
  }
};

/// A class which abstracts out some details necessary for
/// making a call.
///
/// It is not actually used directly for storing this information in
/// a FunctionType, although FunctionType does currently use the
/// same bit-pattern.
///
// If you add a field (say Foo), other than the obvious places (both,
// constructors, compile failures), what you need to update is
// * Operator==
// * getFoo
// * withFoo
// * functionType. Add Foo, getFoo.
// * ASTContext::getFooType
// * ASTContext::mergeFunctionTypes
// * FunctionNoProtoType::Profile
// * FunctionProtoType::Profile
// * TypePrinter::PrintFunctionProto
// * AST read and write
// * Codegen
class ExtInfo {
  friend class FunctionType;

  // Feel free to rearrange or add bits, but if you go over 16, you'll need to
  // adjust the Bits field below, and if you add bits, you'll need to adjust
  // Type::FunctionTypeBitfields::ExtInfo as well.

  // |  CC  |noreturn|produces|nocallersavedregs|regparm|nocfcheck|cmsenscall|
  // |0 .. 4|   5    |    6   |       7         |8 .. 10|    11   |    12    |
  //
  // regparm is either 0 (no regparm attribute) or the regparm value+1.
  enum { CallConvMask = 0x1F };
  enum { NoReturnMask = 0x20 };
  enum { ProducesResultMask = 0x40 };
  enum { NoCallerSavedRegsMask = 0x80 };
  enum {
    RegParmMask =  0x700,
    RegParmOffset = 8
  };
  enum { NoCfCheckMask = 0x800 };
  enum { CmseNSCallMask = 0x1000 };
  uint16_t Bits = CC_C;

  ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {}

public:
  // Constructor with no defaults. Use this when you know that you
  // have all the elements (when reading an AST file for example).
  ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc,
          bool producesResult, bool noCallerSavedRegs, bool NoCfCheck,
          bool cmseNSCall) {
    assert((!hasRegParm || regParm < 7) && "Invalid regparm value")((void)0);
    Bits = ((unsigned)cc) | (noReturn ? NoReturnMask : 0) |
           (producesResult ? ProducesResultMask : 0) |
           (noCallerSavedRegs ? NoCallerSavedRegsMask : 0) |
           (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0) |
           (NoCfCheck ? NoCfCheckMask : 0) |
           (cmseNSCall ? CmseNSCallMask : 0);
  }

  // Constructor with all defaults. Use when for example creating a
  // function known to use defaults.
  ExtInfo() = default;

  // Constructor with just the calling convention, which is an important part
  // of the canonical type.
  ExtInfo(CallingConv CC) : Bits(CC) {}

  bool getNoReturn() const { return Bits & NoReturnMask; }
  bool getProducesResult() const { return Bits & ProducesResultMask; }
  bool getCmseNSCall() const { return Bits & CmseNSCallMask; }
  bool getNoCallerSavedRegs() const { return Bits & NoCallerSavedRegsMask; }
  bool getNoCfCheck() const { return Bits & NoCfCheckMask; }
  bool getHasRegParm() const { return ((Bits & RegParmMask) >> RegParmOffset) != 0; }

  unsigned getRegParm() const {
    unsigned RegParm = (Bits & RegParmMask) >> RegParmOffset;
    if (RegParm > 0)
      --RegParm;
    return RegParm;
  }

  CallingConv getCC() const { return CallingConv(Bits & CallConvMask); }

  bool operator==(ExtInfo Other) const {
    return Bits == Other.Bits;
  }
  bool operator!=(ExtInfo Other) const {
    return Bits != Other.Bits;
  }

  // Note that we don't have setters. That is by design, use
  // the following with methods instead of mutating these objects.

  ExtInfo withNoReturn(bool noReturn) const {
    if (noReturn)
      return ExtInfo(Bits | NoReturnMask);
    else
      return ExtInfo(Bits & ~NoReturnMask);
  }

  ExtInfo withProducesResult(bool producesResult) const {
    if (producesResult)
      return ExtInfo(Bits | ProducesResultMask);
    else
      return ExtInfo(Bits & ~ProducesResultMask);
  }

  ExtInfo withCmseNSCall(bool cmseNSCall) const {
    if (cmseNSCall)
      return ExtInfo(Bits | CmseNSCallMask);
    else
      return ExtInfo(Bits & ~CmseNSCallMask);
  }

  ExtInfo withNoCallerSavedRegs(bool noCallerSavedRegs) const {
    if (noCallerSavedRegs)
      return ExtInfo(Bits | NoCallerSavedRegsMask);
    else
      return ExtInfo(Bits & ~NoCallerSavedRegsMask);
  }

  ExtInfo withNoCfCheck(bool noCfCheck) const {
    if (noCfCheck)
      return ExtInfo(Bits | NoCfCheckMask);
    else
      return ExtInfo(Bits & ~NoCfCheckMask);
  }

  ExtInfo withRegParm(unsigned RegParm) const {
    assert(RegParm < 7 && "Invalid regparm value")((void)0);
    return ExtInfo((Bits & ~RegParmMask) |
                   ((RegParm + 1) << RegParmOffset));
  }

  ExtInfo withCallingConv(CallingConv cc) const {
    return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc);
  }

  void Profile(llvm::FoldingSetNodeID &ID) const {
    ID.AddInteger(Bits);
  }
};

/// A simple holder for a QualType representing a type in an
/// exception specification. Unfortunately needed by FunctionProtoType
/// because TrailingObjects cannot handle repeated types.
struct ExceptionType { QualType Type; };

/// A simple holder for various uncommon bits which do not fit in
/// FunctionTypeBitfields. Aligned to alignof(void *) to maintain the
/// alignment of subsequent objects in TrailingObjects. You must update
/// hasExtraBitfields in FunctionProtoType after adding extra data here.
struct alignas(void *) FunctionTypeExtraBitfields {
  /// The number of types in the exception specification.
  /// A whole unsigned is not needed here and according to
  /// [implimits] 8 bits would be enough here.
  unsigned NumExceptionType;
};

3799protected:
FunctionType(TypeClass tc, QualType res, QualType Canonical,
             TypeDependence Dependence, ExtInfo Info)
    : Type(tc, Canonical, Dependence), ResultType(res) {
  FunctionTypeBits.ExtInfo = Info.Bits;
}

Qualifiers getFastTypeQuals() const {
  return Qualifiers::fromFastMask(FunctionTypeBits.FastTypeQuals);
}

3810public:
QualType getReturnType() const { return ResultType; }

bool getHasRegParm() const { return getExtInfo().getHasRegParm(); }
unsigned getRegParmType() const { return getExtInfo().getRegParm(); }

/// Determine whether this function type includes the GNU noreturn
/// attribute. The C++11 [[noreturn]] attribute does not affect the function
/// type.
bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); }

bool getCmseNSCallAttr() const { return getExtInfo().getCmseNSCall(); }
CallingConv getCallConv() const { return getExtInfo().getCC(); }
ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); }

static_assert((~Qualifiers::FastMask & Qualifiers::CVRMask) == 0,
              "Const, volatile and restrict are assumed to be a subset of "
              "the fast qualifiers.");

bool isConst() const { return getFastTypeQuals().hasConst(); }
bool isVolatile() const { return getFastTypeQuals().hasVolatile(); }
bool isRestrict() const { return getFastTypeQuals().hasRestrict(); }

/// Determine the type of an expression that calls a function of
/// this type.
QualType getCallResultType(const ASTContext &Context) const {
  return getReturnType().getNonLValueExprType(Context);
}

static StringRef getNameForCallConv(CallingConv CC);

static bool classof(const Type *T) {
  return T->getTypeClass() == FunctionNoProto ||
         T->getTypeClass() == FunctionProto;
}
3845};

3847/// Represents a K&R-style 'int foo()' function, which has
3848/// no information available about its arguments.
3849class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info)
    : FunctionType(FunctionNoProto, Result, Canonical,
                   Result->getDependence() &
                       ~(TypeDependence::DependentInstantiation |
                         TypeDependence::UnexpandedPack),
                   Info) {}

3859public:
// No additional state past what FunctionType provides.

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getReturnType(), getExtInfo());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType,
                    ExtInfo Info) {
  Info.Profile(ID);
  ID.AddPointer(ResultType.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == FunctionNoProto;
}
3878};

3880/// Represents a prototype with parameter type info, e.g.
3881/// 'int foo(int)' or 'int foo(void)'.  'void' is represented as having no
3882/// parameters, not as having a single void parameter. Such a type can have
3883/// an exception specification, but this specification is not part of the
3884/// canonical type. FunctionProtoType has several trailing objects, some of
3885/// which optional. For more information about the trailing objects see
3886/// the first comment inside FunctionProtoType.
3887class FunctionProtoType final
  : public FunctionType,
    public llvm::FoldingSetNode,
    private llvm::TrailingObjects<
        FunctionProtoType, QualType, SourceLocation,
        FunctionType::FunctionTypeExtraBitfields, FunctionType::ExceptionType,
        Expr *, FunctionDecl *, FunctionType::ExtParameterInfo, Qualifiers> {
friend class ASTContext; // ASTContext creates these.
friend TrailingObjects;

// FunctionProtoType is followed by several trailing objects, some of
// which optional. They are in order:
//
// * An array of getNumParams() QualType holding the parameter types.
//   Always present. Note that for the vast majority of FunctionProtoType,
//   these will be the only trailing objects.
//
// * Optionally if the function is variadic, the SourceLocation of the
//   ellipsis.
//
// * Optionally if some extra data is stored in FunctionTypeExtraBitfields
//   (see FunctionTypeExtraBitfields and FunctionTypeBitfields):
//   a single FunctionTypeExtraBitfields. Present if and only if
//   hasExtraBitfields() is true.
//
// * Optionally exactly one of:
//   * an array of getNumExceptions() ExceptionType,
//   * a single Expr *,
//   * a pair of FunctionDecl *,
//   * a single FunctionDecl *
//   used to store information about the various types of exception
//   specification. See getExceptionSpecSize for the details.
//
// * Optionally an array of getNumParams() ExtParameterInfo holding
//   an ExtParameterInfo for each of the parameters. Present if and
//   only if hasExtParameterInfos() is true.
//
// * Optionally a Qualifiers object to represent extra qualifiers that can't
//   be represented by FunctionTypeBitfields.FastTypeQuals. Present if and only
//   if hasExtQualifiers() is true.
//
// The optional FunctionTypeExtraBitfields has to be before the data
// related to the exception specification since it contains the number
// of exception types.
//
// We put the ExtParameterInfos last.  If all were equal, it would make
// more sense to put these before the exception specification, because
// it's much easier to skip past them compared to the elaborate switch
// required to skip the exception specification.  However, all is not
// equal; ExtParameterInfos are used to model very uncommon features,
// and it's better not to burden the more common paths.

3939public:
/// Holds information about the various types of exception specification.
/// ExceptionSpecInfo is not stored as such in FunctionProtoType but is
/// used to group together the various bits of information about the
/// exception specification.
struct ExceptionSpecInfo {
  /// The kind of exception specification this is.
  ExceptionSpecificationType Type = EST_None;

  /// Explicitly-specified list of exception types.
  ArrayRef<QualType> Exceptions;

  /// Noexcept expression, if this is a computed noexcept specification.
  Expr *NoexceptExpr = nullptr;

  /// The function whose exception specification this is, for
  /// EST_Unevaluated and EST_Uninstantiated.
  FunctionDecl *SourceDecl = nullptr;

  /// The function template whose exception specification this is instantiated
  /// from, for EST_Uninstantiated.
  FunctionDecl *SourceTemplate = nullptr;

  ExceptionSpecInfo() = default;

  ExceptionSpecInfo(ExceptionSpecificationType EST) : Type(EST) {}
};

/// Extra information about a function prototype. ExtProtoInfo is not
/// stored as such in FunctionProtoType but is used to group together
/// the various bits of extra information about a function prototype.
struct ExtProtoInfo {
  FunctionType::ExtInfo ExtInfo;
  bool Variadic : 1;
  bool HasTrailingReturn : 1;
  Qualifiers TypeQuals;
  RefQualifierKind RefQualifier = RQ_None;
  ExceptionSpecInfo ExceptionSpec;
  const ExtParameterInfo *ExtParameterInfos = nullptr;
  SourceLocation EllipsisLoc;

  ExtProtoInfo() : Variadic(false), HasTrailingReturn(false) {}

  ExtProtoInfo(CallingConv CC)
      : ExtInfo(CC), Variadic(false), HasTrailingReturn(false) {}

  ExtProtoInfo withExceptionSpec(const ExceptionSpecInfo &ESI) {
    ExtProtoInfo Result(*this);
    Result.ExceptionSpec = ESI;
    return Result;
  }
};

3992private:
unsigned numTrailingObjects(OverloadToken<QualType>) const {
  return getNumParams();
}

unsigned numTrailingObjects(OverloadToken<SourceLocation>) const {
  return isVariadic();
}

unsigned numTrailingObjects(OverloadToken<FunctionTypeExtraBitfields>) const {
  return hasExtraBitfields();
}

unsigned numTrailingObjects(OverloadToken<ExceptionType>) const {
  return getExceptionSpecSize().NumExceptionType;
}

unsigned numTrailingObjects(OverloadToken<Expr *>) const {
  return getExceptionSpecSize().NumExprPtr;
}

unsigned numTrailingObjects(OverloadToken<FunctionDecl *>) const {
  return getExceptionSpecSize().NumFunctionDeclPtr;
}

unsigned numTrailingObjects(OverloadToken<ExtParameterInfo>) const {
  return hasExtParameterInfos() ? getNumParams() : 0;
}

/// Determine whether there are any argument types that
/// contain an unexpanded parameter pack.
static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray,
                                               unsigned numArgs) {
  for (unsigned Idx = 0; Idx < numArgs; ++Idx)
    if (ArgArray[Idx]->containsUnexpandedParameterPack())
      return true;

  return false;
}

FunctionProtoType(QualType result, ArrayRef<QualType> params,
                  QualType canonical, const ExtProtoInfo &epi);

/// This struct is returned by getExceptionSpecSize and is used to
/// translate an ExceptionSpecificationType to the number and kind
/// of trailing objects related to the exception specification.
struct ExceptionSpecSizeHolder {
  unsigned NumExceptionType;
  unsigned NumExprPtr;
  unsigned NumFunctionDeclPtr;
};

/// Return the number and kind of trailing objects
/// related to the exception specification.
static ExceptionSpecSizeHolder
getExceptionSpecSize(ExceptionSpecificationType EST, unsigned NumExceptions) {
  switch (EST) {
  case EST_None:
  case EST_DynamicNone:
  case EST_MSAny:
  case EST_BasicNoexcept:
  case EST_Unparsed:
  case EST_NoThrow:
    return {0, 0, 0};

  case EST_Dynamic:
    return {NumExceptions, 0, 0};

  case EST_DependentNoexcept:
  case EST_NoexceptFalse:
  case EST_NoexceptTrue:
    return {0, 1, 0};

  case EST_Uninstantiated:
    return {0, 0, 2};

  case EST_Unevaluated:
    return {0, 0, 1};
  }
  llvm_unreachable("bad exception specification kind")__builtin_unreachable();
}

/// Return the number and kind of trailing objects
/// related to the exception specification.
ExceptionSpecSizeHolder getExceptionSpecSize() const {
  return getExceptionSpecSize(getExceptionSpecType(), getNumExceptions());
}

/// Whether the trailing FunctionTypeExtraBitfields is present.
static bool hasExtraBitfields(ExceptionSpecificationType EST) {
  // If the exception spec type is EST_Dynamic then we have > 0 exception
  // types and the exact number is stored in FunctionTypeExtraBitfields.
  return EST == EST_Dynamic;
}

/// Whether the trailing FunctionTypeExtraBitfields is present.
bool hasExtraBitfields() const {
  return hasExtraBitfields(getExceptionSpecType());
}

bool hasExtQualifiers() const {
  return FunctionTypeBits.HasExtQuals;
}

4096public:
unsigned getNumParams() const { return FunctionTypeBits.NumParams; }

QualType getParamType(unsigned i) const {
  assert(i < getNumParams() && "invalid parameter index")((void)0);
  return param_type_begin()[i];
}

ArrayRef<QualType> getParamTypes() const {
  return llvm::makeArrayRef(param_type_begin(), param_type_end());
}

ExtProtoInfo getExtProtoInfo() const {
  ExtProtoInfo EPI;
  EPI.ExtInfo = getExtInfo();
  EPI.Variadic = isVariadic();
  EPI.EllipsisLoc = getEllipsisLoc();
  EPI.HasTrailingReturn = hasTrailingReturn();
  EPI.ExceptionSpec = getExceptionSpecInfo();
  EPI.TypeQuals = getMethodQuals();
  EPI.RefQualifier = getRefQualifier();
  EPI.ExtParameterInfos = getExtParameterInfosOrNull();
  return EPI;
}

/// Get the kind of exception specification on this function.
ExceptionSpecificationType getExceptionSpecType() const {
  return static_cast<ExceptionSpecificationType>(
      FunctionTypeBits.ExceptionSpecType);
}

/// Return whether this function has any kind of exception spec.
bool hasExceptionSpec() const { return getExceptionSpecType() != EST_None; }

/// Return whether this function has a dynamic (throw) exception spec.
bool hasDynamicExceptionSpec() const {
  return isDynamicExceptionSpec(getExceptionSpecType());
}

/// Return whether this function has a noexcept exception spec.
bool hasNoexceptExceptionSpec() const {
  return isNoexceptExceptionSpec(getExceptionSpecType());
}

/// Return whether this function has a dependent exception spec.
bool hasDependentExceptionSpec() const;

/// Return whether this function has an instantiation-dependent exception
/// spec.
bool hasInstantiationDependentExceptionSpec() const;

/// Return all the available information about this type's exception spec.
ExceptionSpecInfo getExceptionSpecInfo() const {
  ExceptionSpecInfo Result;
  Result.Type = getExceptionSpecType();
  if (Result.Type == EST_Dynamic) {
    Result.Exceptions = exceptions();
  } else if (isComputedNoexcept(Result.Type)) {
    Result.NoexceptExpr = getNoexceptExpr();
  } else if (Result.Type == EST_Uninstantiated) {
    Result.SourceDecl = getExceptionSpecDecl();
    Result.SourceTemplate = getExceptionSpecTemplate();
  } else if (Result.Type == EST_Unevaluated) {
    Result.SourceDecl = getExceptionSpecDecl();
  }
  return Result;
}

/// Return the number of types in the exception specification.
unsigned getNumExceptions() const {
  return getExceptionSpecType() == EST_Dynamic
             ? getTrailingObjects<FunctionTypeExtraBitfields>()
                   ->NumExceptionType
             : 0;
}

/// Return the ith exception type, where 0 <= i < getNumExceptions().
QualType getExceptionType(unsigned i) const {
  assert(i < getNumExceptions() && "Invalid exception number!")((void)0);
  return exception_begin()[i];
}

/// Return the expression inside noexcept(expression), or a null pointer
/// if there is none (because the exception spec is not of this form).
Expr *getNoexceptExpr() const {
  if (!isComputedNoexcept(getExceptionSpecType()))
    return nullptr;
  return *getTrailingObjects<Expr *>();
}

/// If this function type has an exception specification which hasn't
/// been determined yet (either because it has not been evaluated or because
/// it has not been instantiated), this is the function whose exception
/// specification is represented by this type.
FunctionDecl *getExceptionSpecDecl() const {
  if (getExceptionSpecType() != EST_Uninstantiated &&
      getExceptionSpecType() != EST_Unevaluated)
    return nullptr;
  return getTrailingObjects<FunctionDecl *>()[0];
}

/// If this function type has an uninstantiated exception
/// specification, this is the function whose exception specification
/// should be instantiated to find the exception specification for
/// this type.
FunctionDecl *getExceptionSpecTemplate() const {
  if (getExceptionSpecType() != EST_Uninstantiated)
    return nullptr;
  return getTrailingObjects<FunctionDecl *>()[1];
}

/// Determine whether this function type has a non-throwing exception
/// specification.
CanThrowResult canThrow() const;

/// Determine whether this function type has a non-throwing exception
/// specification. If this depends on template arguments, returns
/// \c ResultIfDependent.
bool isNothrow(bool ResultIfDependent = false) const {
  return ResultIfDependent ? canThrow() != CT_Can : canThrow() == CT_Cannot;
}

/// Whether this function prototype is variadic.
bool isVariadic() const { return FunctionTypeBits.Variadic; }

SourceLocation getEllipsisLoc() const {
  return isVariadic() ? *getTrailingObjects<SourceLocation>()
                      : SourceLocation();
}

/// Determines whether this function prototype contains a
/// parameter pack at the end.
///
/// A function template whose last parameter is a parameter pack can be
/// called with an arbitrary number of arguments, much like a variadic
/// function.
bool isTemplateVariadic() const;

/// Whether this function prototype has a trailing return type.
bool hasTrailingReturn() const { return FunctionTypeBits.HasTrailingReturn; }

Qualifiers getMethodQuals() const {
  if (hasExtQualifiers())
    return *getTrailingObjects<Qualifiers>();
  else
    return getFastTypeQuals();
}

/// Retrieve the ref-qualifier associated with this function type.
RefQualifierKind getRefQualifier() const {
  return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier);
}

using param_type_iterator = const QualType *;
using param_type_range = llvm::iterator_range<param_type_iterator>;

param_type_range param_types() const {
  return param_type_range(param_type_begin(), param_type_end());
}

param_type_iterator param_type_begin() const {
  return getTrailingObjects<QualType>();
}

param_type_iterator param_type_end() const {
  return param_type_begin() + getNumParams();
}

using exception_iterator = const QualType *;

ArrayRef<QualType> exceptions() const {
  return llvm::makeArrayRef(exception_begin(), exception_end());
}

exception_iterator exception_begin() const {
  return reinterpret_cast<exception_iterator>(
      getTrailingObjects<ExceptionType>());
}

exception_iterator exception_end() const {
  return exception_begin() + getNumExceptions();
}

/// Is there any interesting extra information for any of the parameters
/// of this function type?
bool hasExtParameterInfos() const {
  return FunctionTypeBits.HasExtParameterInfos;
}

ArrayRef<ExtParameterInfo> getExtParameterInfos() const {
  assert(hasExtParameterInfos())((void)0);
  return ArrayRef<ExtParameterInfo>(getTrailingObjects<ExtParameterInfo>(),
                                    getNumParams());
}

/// Return a pointer to the beginning of the array of extra parameter
/// information, if present, or else null if none of the parameters
/// carry it.  This is equivalent to getExtProtoInfo().ExtParameterInfos.
const ExtParameterInfo *getExtParameterInfosOrNull() const {
  if (!hasExtParameterInfos())
    return nullptr;
  return getTrailingObjects<ExtParameterInfo>();
}

ExtParameterInfo getExtParameterInfo(unsigned I) const {
  assert(I < getNumParams() && "parameter index out of range")((void)0);
  if (hasExtParameterInfos())
    return getTrailingObjects<ExtParameterInfo>()[I];
  return ExtParameterInfo();
}

ParameterABI getParameterABI(unsigned I) const {
  assert(I < getNumParams() && "parameter index out of range")((void)0);
  if (hasExtParameterInfos())
    return getTrailingObjects<ExtParameterInfo>()[I].getABI();
  return ParameterABI::Ordinary;
}

bool isParamConsumed(unsigned I) const {
  assert(I < getNumParams() && "parameter index out of range")((void)0);
  if (hasExtParameterInfos())
    return getTrailingObjects<ExtParameterInfo>()[I].isConsumed();
  return false;
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void printExceptionSpecification(raw_ostream &OS,
                                 const PrintingPolicy &Policy) const;

static bool classof(const Type *T) {
  return T->getTypeClass() == FunctionProto;
}

void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx);
static void Profile(llvm::FoldingSetNodeID &ID, QualType Result,
                    param_type_iterator ArgTys, unsigned NumArgs,
                    const ExtProtoInfo &EPI, const ASTContext &Context,
                    bool Canonical);
4336};

4338/// Represents the dependent type named by a dependently-scoped
4339/// typename using declaration, e.g.
4340///   using typename Base<T>::foo;
4341///
4342/// Template instantiation turns these into the underlying type.
4343class UnresolvedUsingType : public Type {
friend class ASTContext; // ASTContext creates these.

UnresolvedUsingTypenameDecl *Decl;

UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D)
    : Type(UnresolvedUsing, QualType(),
           TypeDependence::DependentInstantiation),
      Decl(const_cast<UnresolvedUsingTypenameDecl *>(D)) {}

4353public:
UnresolvedUsingTypenameDecl *getDecl() const { return Decl; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == UnresolvedUsing;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  return Profile(ID, Decl);
}

static void Profile(llvm::FoldingSetNodeID &ID,
                    UnresolvedUsingTypenameDecl *D) {
  ID.AddPointer(D);
}
4371};

4373class TypedefType : public Type {
TypedefNameDecl *Decl;

4376private:
friend class ASTContext; // ASTContext creates these.

TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType underlying,
            QualType can);

4382public:
TypedefNameDecl *getDecl() const { return Decl; }

bool isSugared() const { return true; }
QualType desugar() const;

static bool classof(const Type *T) { return T->getTypeClass() == Typedef; }
4389};

4391/// Sugar type that represents a type that was qualified by a qualifier written
4392/// as a macro invocation.
4393class MacroQualifiedType : public Type {
friend class ASTContext; // ASTContext creates these.

QualType UnderlyingTy;
const IdentifierInfo *MacroII;

MacroQualifiedType(QualType UnderlyingTy, QualType CanonTy,
                   const IdentifierInfo *MacroII)
    : Type(MacroQualified, CanonTy, UnderlyingTy->getDependence()),
      UnderlyingTy(UnderlyingTy), MacroII(MacroII) {
  assert(isa<AttributedType>(UnderlyingTy) &&((void)0)
         "Expected a macro qualified type to only wrap attributed types.")((void)0);
}

4407public:
const IdentifierInfo *getMacroIdentifier() const { return MacroII; }
QualType getUnderlyingType() const { return UnderlyingTy; }

/// Return this attributed type's modified type with no qualifiers attached to
/// it.
QualType getModifiedType() const;

bool isSugared() const { return true; }
QualType desugar() const;

static bool classof(const Type *T) {
  return T->getTypeClass() == MacroQualified;
}
4421};

4423/// Represents a `typeof` (or __typeof__) expression (a GCC extension).
4424class TypeOfExprType : public Type {
Expr *TOExpr;

4427protected:
friend class ASTContext; // ASTContext creates these.

TypeOfExprType(Expr *E, QualType can = QualType());

4432public:
Expr *getUnderlyingExpr() const { return TOExpr; }

/// Remove a single level of sugar.
QualType desugar() const;

/// Returns whether this type directly provides sugar.
bool isSugared() const;

static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; }
4442};

4444/// Internal representation of canonical, dependent
4445/// `typeof(expr)` types.
4446///
4447/// This class is used internally by the ASTContext to manage
4448/// canonical, dependent types, only. Clients will only see instances
4449/// of this class via TypeOfExprType nodes.
4450class DependentTypeOfExprType
: public TypeOfExprType, public llvm::FoldingSetNode {
const ASTContext &Context;

4454public:
DependentTypeOfExprType(const ASTContext &Context, Expr *E)
    : TypeOfExprType(E), Context(Context) {}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getUnderlyingExpr());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    Expr *E);
4464};

4466/// Represents `typeof(type)`, a GCC extension.
4467class TypeOfType : public Type {
friend class ASTContext; // ASTContext creates these.

QualType TOType;

TypeOfType(QualType T, QualType can)
    : Type(TypeOf, can, T->getDependence()), TOType(T) {
  assert(!isa<TypedefType>(can) && "Invalid canonical type")((void)0);
}

4477public:
QualType getUnderlyingType() const { return TOType; }

/// Remove a single level of sugar.
QualType desugar() const { return getUnderlyingType(); }

/// Returns whether this type directly provides sugar.
bool isSugared() const { return true; }

static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; }
4487};

4489/// Represents the type `decltype(expr)` (C++11).
4490class DecltypeType : public Type {
Expr *E;
QualType UnderlyingType;

4494protected:
friend class ASTContext; // ASTContext creates these.

DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType());

4499public:
Expr *getUnderlyingExpr() const { return E; }
QualType getUnderlyingType() const { return UnderlyingType; }

/// Remove a single level of sugar.
QualType desugar() const;

/// Returns whether this type directly provides sugar.
bool isSugared() const;

static bool classof(const Type *T) { return T->getTypeClass() == Decltype; }
4510};

4512/// Internal representation of canonical, dependent
4513/// decltype(expr) types.
4514///
4515/// This class is used internally by the ASTContext to manage
4516/// canonical, dependent types, only. Clients will only see instances
4517/// of this class via DecltypeType nodes.
4518class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode {
const ASTContext &Context;

4521public:
DependentDecltypeType(const ASTContext &Context, Expr *E);

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getUnderlyingExpr());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    Expr *E);
4530};

4532/// A unary type transform, which is a type constructed from another.
4533class UnaryTransformType : public Type {
4534public:
enum UTTKind {
  EnumUnderlyingType
};

4539private:
/// The untransformed type.
QualType BaseType;

/// The transformed type if not dependent, otherwise the same as BaseType.
QualType UnderlyingType;

UTTKind UKind;

4548protected:
friend class ASTContext;

UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind,
                   QualType CanonicalTy);

4554public:
bool isSugared() const { return !isDependentType(); }
QualType desugar() const { return UnderlyingType; }

QualType getUnderlyingType() const { return UnderlyingType; }
QualType getBaseType() const { return BaseType; }

UTTKind getUTTKind() const { return UKind; }

static bool classof(const Type *T) {
  return T->getTypeClass() == UnaryTransform;
}
4566};

4568/// Internal representation of canonical, dependent
4569/// __underlying_type(type) types.
4570///
4571/// This class is used internally by the ASTContext to manage
4572/// canonical, dependent types, only. Clients will only see instances
4573/// of this class via UnaryTransformType nodes.
4574class DependentUnaryTransformType : public UnaryTransformType,
                                  public llvm::FoldingSetNode {
4576public:
DependentUnaryTransformType(const ASTContext &C, QualType BaseType,
                            UTTKind UKind);

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getBaseType(), getUTTKind());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType BaseType,
                    UTTKind UKind) {
  ID.AddPointer(BaseType.getAsOpaquePtr());
  ID.AddInteger((unsigned)UKind);
}
4589};

4591class TagType : public Type {
friend class ASTReader;
template <class T> friend class serialization::AbstractTypeReader;

/// Stores the TagDecl associated with this type. The decl may point to any
/// TagDecl that declares the entity.
TagDecl *decl;

4599protected:
TagType(TypeClass TC, const TagDecl *D, QualType can);

4602public:
TagDecl *getDecl() const;

/// Determines whether this type is in the process of being defined.
bool isBeingDefined() const;

static bool classof(const Type *T) {
  return T->getTypeClass() == Enum || T->getTypeClass() == Record;
}
4611};

4613/// A helper class that allows the use of isa/cast/dyncast
4614/// to detect TagType objects of structs/unions/classes.
4615class RecordType : public TagType {
4616protected:
friend class ASTContext; // ASTContext creates these.

explicit RecordType(const RecordDecl *D)
    : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) {}
explicit RecordType(TypeClass TC, RecordDecl *D)
    : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) {}

4624public:
RecordDecl *getDecl() const {
  return reinterpret_cast<RecordDecl*>(TagType::getDecl());
}

/// Recursively check all fields in the record for const-ness. If any field
/// is declared const, return true. Otherwise, return false.
bool hasConstFields() const;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) { return T->getTypeClass() == Record; }
4637};

4639/// A helper class that allows the use of isa/cast/dyncast
4640/// to detect TagType objects of enums.
4641class EnumType : public TagType {
friend class ASTContext; // ASTContext creates these.

explicit EnumType(const EnumDecl *D)
    : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) {}

4647public:
EnumDecl *getDecl() const {
  return reinterpret_cast<EnumDecl*>(TagType::getDecl());
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) { return T->getTypeClass() == Enum; }
4656};

4658/// An attributed type is a type to which a type attribute has been applied.
4659///
4660/// The "modified type" is the fully-sugared type to which the attributed
4661/// type was applied; generally it is not canonically equivalent to the
4662/// attributed type. The "equivalent type" is the minimally-desugared type
4663/// which the type is canonically equivalent to.
4664///
4665/// For example, in the following attributed type:
4666///     int32_t __attribute__((vector_size(16)))
4667///   - the modified type is the TypedefType for int32_t
4668///   - the equivalent type is VectorType(16, int32_t)
4669///   - the canonical type is VectorType(16, int)
4670class AttributedType : public Type, public llvm::FoldingSetNode {
4671public:
using Kind = attr::Kind;

4674private:
friend class ASTContext; // ASTContext creates these

QualType ModifiedType;
QualType EquivalentType;

AttributedType(QualType canon, attr::Kind attrKind, QualType modified,
               QualType equivalent)
    : Type(Attributed, canon, equivalent->getDependence()),
      ModifiedType(modified), EquivalentType(equivalent) {
  AttributedTypeBits.AttrKind = attrKind;
}

4687public:
Kind getAttrKind() const {
  return static_cast<Kind>(AttributedTypeBits.AttrKind);
}

QualType getModifiedType() const { return ModifiedType; }
QualType getEquivalentType() const { return EquivalentType; }

bool isSugared() const { return true; }
QualType desugar() const { return getEquivalentType(); }

/// Does this attribute behave like a type qualifier?
///
/// A type qualifier adjusts a type to provide specialized rules for
/// a specific object, like the standard const and volatile qualifiers.
/// This includes attributes controlling things like nullability,
/// address spaces, and ARC ownership.  The value of the object is still
/// largely described by the modified type.
///
/// In contrast, many type attributes "rewrite" their modified type to
/// produce a fundamentally different type, not necessarily related in any
/// formalizable way to the original type.  For example, calling convention
/// and vector attributes are not simple type qualifiers.
///
/// Type qualifiers are often, but not always, reflected in the canonical
/// type.
bool isQualifier() const;

bool isMSTypeSpec() const;

bool isCallingConv() const;

llvm::Optional<NullabilityKind> getImmediateNullability() const;

/// Retrieve the attribute kind corresponding to the given
/// nullability kind.
static Kind getNullabilityAttrKind(NullabilityKind kind) {
  switch (kind) {
  case NullabilityKind::NonNull:
    return attr::TypeNonNull;

  case NullabilityKind::Nullable:
    return attr::TypeNullable;

  case NullabilityKind::NullableResult:
    return attr::TypeNullableResult;

  case NullabilityKind::Unspecified:
    return attr::TypeNullUnspecified;
  }
  llvm_unreachable("Unknown nullability kind.")__builtin_unreachable();
}

/// Strip off the top-level nullability annotation on the given
/// type, if it's there.
///
/// \param T The type to strip. If the type is exactly an
/// AttributedType specifying nullability (without looking through
/// type sugar), the nullability is returned and this type changed
/// to the underlying modified type.
///
/// \returns the top-level nullability, if present.
static Optional<NullabilityKind> stripOuterNullability(QualType &T);

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getAttrKind(), ModifiedType, EquivalentType);
}

static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind,
                    QualType modified, QualType equivalent) {
  ID.AddInteger(attrKind);
  ID.AddPointer(modified.getAsOpaquePtr());
  ID.AddPointer(equivalent.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Attributed;
}
4765};

4767class TemplateTypeParmType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

// Helper data collector for canonical types.
struct CanonicalTTPTInfo {
  unsigned Depth : 15;
  unsigned ParameterPack : 1;
  unsigned Index : 16;
};

union {
  // Info for the canonical type.
  CanonicalTTPTInfo CanTTPTInfo;

  // Info for the non-canonical type.
  TemplateTypeParmDecl *TTPDecl;
};

/// Build a non-canonical type.
TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon)
    : Type(TemplateTypeParm, Canon,
           TypeDependence::DependentInstantiation |
               (Canon->getDependence() & TypeDependence::UnexpandedPack)),
      TTPDecl(TTPDecl) {}

/// Build the canonical type.
TemplateTypeParmType(unsigned D, unsigned I, bool PP)
    : Type(TemplateTypeParm, QualType(this, 0),
           TypeDependence::DependentInstantiation |
               (PP ? TypeDependence::UnexpandedPack : TypeDependence::None)) {
  CanTTPTInfo.Depth = D;
  CanTTPTInfo.Index = I;
  CanTTPTInfo.ParameterPack = PP;
}

const CanonicalTTPTInfo& getCanTTPTInfo() const {
  QualType Can = getCanonicalTypeInternal();
  return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo;
}

4807public:
unsigned getDepth() const { return getCanTTPTInfo().Depth; }
unsigned getIndex() const { return getCanTTPTInfo().Index; }
bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; }

TemplateTypeParmDecl *getDecl() const {
  return isCanonicalUnqualified() ? nullptr : TTPDecl;
}

IdentifierInfo *getIdentifier() const;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl());
}

static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth,
                    unsigned Index, bool ParameterPack,
                    TemplateTypeParmDecl *TTPDecl) {
  ID.AddInteger(Depth);
  ID.AddInteger(Index);
  ID.AddBoolean(ParameterPack);
  ID.AddPointer(TTPDecl);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == TemplateTypeParm;
}
4837};

4839/// Represents the result of substituting a type for a template
4840/// type parameter.
4841///
4842/// Within an instantiated template, all template type parameters have
4843/// been replaced with these.  They are used solely to record that a
4844/// type was originally written as a template type parameter;
4845/// therefore they are never canonical.
4846class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode {
friend class ASTContext;

// The original type parameter.
const TemplateTypeParmType *Replaced;

SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon)
    : Type(SubstTemplateTypeParm, Canon, Canon->getDependence()),
      Replaced(Param) {}

4856public:
/// Gets the template parameter that was substituted for.
const TemplateTypeParmType *getReplacedParameter() const {
  return Replaced;
}

/// Gets the type that was substituted for the template
/// parameter.
QualType getReplacementType() const {
  return getCanonicalTypeInternal();
}

bool isSugared() const { return true; }
QualType desugar() const { return getReplacementType(); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getReplacedParameter(), getReplacementType());
}

static void Profile(llvm::FoldingSetNodeID &ID,
                    const TemplateTypeParmType *Replaced,
                    QualType Replacement) {
  ID.AddPointer(Replaced);
  ID.AddPointer(Replacement.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == SubstTemplateTypeParm;
}
4885};

4887/// Represents the result of substituting a set of types for a template
4888/// type parameter pack.
4889///
4890/// When a pack expansion in the source code contains multiple parameter packs
4891/// and those parameter packs correspond to different levels of template
4892/// parameter lists, this type node is used to represent a template type
4893/// parameter pack from an outer level, which has already had its argument pack
4894/// substituted but that still lives within a pack expansion that itself
4895/// could not be instantiated. When actually performing a substitution into
4896/// that pack expansion (e.g., when all template parameters have corresponding
4897/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType
4898/// at the current pack substitution index.
4899class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode {
friend class ASTContext;

/// The original type parameter.
const TemplateTypeParmType *Replaced;

/// A pointer to the set of template arguments that this
/// parameter pack is instantiated with.
const TemplateArgument *Arguments;

SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param,
                              QualType Canon,
                              const TemplateArgument &ArgPack);

4913public:
IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); }

/// Gets the template parameter that was substituted for.
const TemplateTypeParmType *getReplacedParameter() const {
  return Replaced;
}

unsigned getNumArgs() const {
  return SubstTemplateTypeParmPackTypeBits.NumArgs;
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

TemplateArgument getArgumentPack() const;

void Profile(llvm::FoldingSetNodeID &ID);
static void Profile(llvm::FoldingSetNodeID &ID,
                    const TemplateTypeParmType *Replaced,
                    const TemplateArgument &ArgPack);

static bool classof(const Type *T) {
  return T->getTypeClass() == SubstTemplateTypeParmPack;
}
4938};

4940/// Common base class for placeholders for types that get replaced by
4941/// placeholder type deduction: C++11 auto, C++14 decltype(auto), C++17 deduced
4942/// class template types, and constrained type names.
4943///
4944/// These types are usually a placeholder for a deduced type. However, before
4945/// the initializer is attached, or (usually) if the initializer is
4946/// type-dependent, there is no deduced type and the type is canonical. In
4947/// the latter case, it is also a dependent type.
4948class DeducedType : public Type {
4949protected:
DeducedType(TypeClass TC, QualType DeducedAsType,
            TypeDependence ExtraDependence)
    : Type(TC,
           // FIXME: Retain the sugared deduced type?
           DeducedAsType.isNull() ? QualType(this, 0)
                                  : DeducedAsType.getCanonicalType(),
           ExtraDependence | (DeducedAsType.isNull()
                                  ? TypeDependence::None
                                  : DeducedAsType->getDependence() &
                                        ~TypeDependence::VariablyModified)) {}

4961public:
bool isSugared() const { return !isCanonicalUnqualified(); }
QualType desugar() const { return getCanonicalTypeInternal(); }

/// Get the type deduced for this placeholder type, or null if it's
/// either not been deduced or was deduced to a dependent type.
QualType getDeducedType() const {
  return !isCanonicalUnqualified() ? getCanonicalTypeInternal() : QualType();
}
bool isDeduced() const {
  return !isCanonicalUnqualified() || isDependentType();
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Auto ||
         T->getTypeClass() == DeducedTemplateSpecialization;
}
4978};

4980/// Represents a C++11 auto or C++14 decltype(auto) type, possibly constrained
4981/// by a type-constraint.
4982class alignas(8) AutoType : public DeducedType, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

ConceptDecl *TypeConstraintConcept;

AutoType(QualType DeducedAsType, AutoTypeKeyword Keyword,
         TypeDependence ExtraDependence, ConceptDecl *CD,
         ArrayRef<TemplateArgument> TypeConstraintArgs);

const TemplateArgument *getArgBuffer() const {
  return reinterpret_cast<const TemplateArgument*>(this+1);
}

TemplateArgument *getArgBuffer() {
  return reinterpret_cast<TemplateArgument*>(this+1);
}

4999public:
/// Retrieve the template arguments.
const TemplateArgument *getArgs() const {
  return getArgBuffer();
}

/// Retrieve the number of template arguments.
unsigned getNumArgs() const {
  return AutoTypeBits.NumArgs;
}

const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h

ArrayRef<TemplateArgument> getTypeConstraintArguments() const {
  return {getArgs(), getNumArgs()};
}

ConceptDecl *getTypeConstraintConcept() const {
  return TypeConstraintConcept;
}

bool isConstrained() const {
  return TypeConstraintConcept != nullptr;
}

bool isDecltypeAuto() const {
  return getKeyword() == AutoTypeKeyword::DecltypeAuto;
}

AutoTypeKeyword getKeyword() const {
  return (AutoTypeKeyword)AutoTypeBits.Keyword;
}

void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) {
  Profile(ID, Context, getDeducedType(), getKeyword(), isDependentType(),
          getTypeConstraintConcept(), getTypeConstraintArguments());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    QualType Deduced, AutoTypeKeyword Keyword,
                    bool IsDependent, ConceptDecl *CD,
                    ArrayRef<TemplateArgument> Arguments);

static bool classof(const Type *T) {
  return T->getTypeClass() == Auto;
}
5045};

5047/// Represents a C++17 deduced template specialization type.
5048class DeducedTemplateSpecializationType : public DeducedType,
                                        public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

/// The name of the template whose arguments will be deduced.
TemplateName Template;

DeducedTemplateSpecializationType(TemplateName Template,
                                  QualType DeducedAsType,
                                  bool IsDeducedAsDependent)
    : DeducedType(DeducedTemplateSpecialization, DeducedAsType,
                  toTypeDependence(Template.getDependence()) |
                      (IsDeducedAsDependent
                           ? TypeDependence::DependentInstantiation
                           : TypeDependence::None)),
      Template(Template) {}

5065public:
/// Retrieve the name of the template that we are deducing.
TemplateName getTemplateName() const { return Template;}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getTemplateName(), getDeducedType(), isDependentType());
}

static void Profile(llvm::FoldingSetNodeID &ID, TemplateName Template,
                    QualType Deduced, bool IsDependent) {
  Template.Profile(ID);
  ID.AddPointer(Deduced.getAsOpaquePtr());
  ID.AddBoolean(IsDependent);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == DeducedTemplateSpecialization;
}
5083};

5085/// Represents a type template specialization; the template
5086/// must be a class template, a type alias template, or a template
5087/// template parameter.  A template which cannot be resolved to one of
5088/// these, e.g. because it is written with a dependent scope
5089/// specifier, is instead represented as a
5090/// @c DependentTemplateSpecializationType.
5091///
5092/// A non-dependent template specialization type is always "sugar",
5093/// typically for a \c RecordType.  For example, a class template
5094/// specialization type of \c vector<int> will refer to a tag type for
5095/// the instantiation \c std::vector<int, std::allocator<int>>
5096///
5097/// Template specializations are dependent if either the template or
5098/// any of the template arguments are dependent, in which case the
5099/// type may also be canonical.
5100///
5101/// Instances of this type are allocated with a trailing array of
5102/// TemplateArguments, followed by a QualType representing the
5103/// non-canonical aliased type when the template is a type alias
5104/// template.
5105class alignas(8) TemplateSpecializationType
  : public Type,
    public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

/// The name of the template being specialized.  This is
/// either a TemplateName::Template (in which case it is a
/// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a
/// TypeAliasTemplateDecl*), a
/// TemplateName::SubstTemplateTemplateParmPack, or a
/// TemplateName::SubstTemplateTemplateParm (in which case the
/// replacement must, recursively, be one of these).
TemplateName Template;

TemplateSpecializationType(TemplateName T,
                           ArrayRef<TemplateArgument> Args,
                           QualType Canon,
                           QualType Aliased);

5124public:
/// Determine whether any of the given template arguments are dependent.
///
/// The converted arguments should be supplied when known; whether an
/// argument is dependent can depend on the conversions performed on it
/// (for example, a 'const int' passed as a template argument might be
/// dependent if the parameter is a reference but non-dependent if the
/// parameter is an int).
///
/// Note that the \p Args parameter is unused: this is intentional, to remind
/// the caller that they need to pass in the converted arguments, not the
/// specified arguments.
static bool
anyDependentTemplateArguments(ArrayRef<TemplateArgumentLoc> Args,
                              ArrayRef<TemplateArgument> Converted);
static bool
anyDependentTemplateArguments(const TemplateArgumentListInfo &,
                              ArrayRef<TemplateArgument> Converted);
static bool anyInstantiationDependentTemplateArguments(
    ArrayRef<TemplateArgumentLoc> Args);

/// True if this template specialization type matches a current
/// instantiation in the context in which it is found.
bool isCurrentInstantiation() const {
  return isa<InjectedClassNameType>(getCanonicalTypeInternal());
}

/// Determine if this template specialization type is for a type alias
/// template that has been substituted.
///
/// Nearly every template specialization type whose template is an alias
/// template will be substituted. However, this is not the case when
/// the specialization contains a pack expansion but the template alias
/// does not have a corresponding parameter pack, e.g.,
///
/// \code
/// template<typename T, typename U, typename V> struct S;
/// template<typename T, typename U> using A = S<T, int, U>;
/// template<typename... Ts> struct X {
///   typedef A<Ts...> type; // not a type alias
/// };
/// \endcode
bool isTypeAlias() const { return TemplateSpecializationTypeBits.TypeAlias; }

/// Get the aliased type, if this is a specialization of a type alias
/// template.
QualType getAliasedType() const {
  assert(isTypeAlias() && "not a type alias template specialization")((void)0);
  return *reinterpret_cast<const QualType*>(end());
}

using iterator = const TemplateArgument *;

iterator begin() const { return getArgs(); }
iterator end() const; // defined inline in TemplateBase.h

/// Retrieve the name of the template that we are specializing.
TemplateName getTemplateName() const { return Template; }

/// Retrieve the template arguments.
const TemplateArgument *getArgs() const {
  return reinterpret_cast<const TemplateArgument *>(this + 1);
}

/// Retrieve the number of template arguments.
unsigned getNumArgs() const {
  return TemplateSpecializationTypeBits.NumArgs;
}

/// Retrieve a specific template argument as a type.
/// \pre \c isArgType(Arg)
const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h

ArrayRef<TemplateArgument> template_arguments() const {
  return {getArgs(), getNumArgs()};
}

bool isSugared() const {
  return !isDependentType() || isCurrentInstantiation() || isTypeAlias();
}

QualType desugar() const {
  return isTypeAlias() ? getAliasedType() : getCanonicalTypeInternal();
}

void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) {
  Profile(ID, Template, template_arguments(), Ctx);
  if (isTypeAlias())
    getAliasedType().Profile(ID);
}

static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T,
                    ArrayRef<TemplateArgument> Args,
                    const ASTContext &Context);

static bool classof(const Type *T) {
  return T->getTypeClass() == TemplateSpecialization;
}
5222};

5224/// Print a template argument list, including the '<' and '>'
5225/// enclosing the template arguments.
5226void printTemplateArgumentList(raw_ostream &OS,
                             ArrayRef<TemplateArgument> Args,
                             const PrintingPolicy &Policy,
                             const TemplateParameterList *TPL = nullptr);

5231void printTemplateArgumentList(raw_ostream &OS,
                             ArrayRef<TemplateArgumentLoc> Args,
                             const PrintingPolicy &Policy,
                             const TemplateParameterList *TPL = nullptr);

5236void printTemplateArgumentList(raw_ostream &OS,
                             const TemplateArgumentListInfo &Args,
                             const PrintingPolicy &Policy,
                             const TemplateParameterList *TPL = nullptr);

5241/// The injected class name of a C++ class template or class
5242/// template partial specialization.  Used to record that a type was
5243/// spelled with a bare identifier rather than as a template-id; the
5244/// equivalent for non-templated classes is just RecordType.
5245///
5246/// Injected class name types are always dependent.  Template
5247/// instantiation turns these into RecordTypes.
5248///
5249/// Injected class name types are always canonical.  This works
5250/// because it is impossible to compare an injected class name type
5251/// with the corresponding non-injected template type, for the same
5252/// reason that it is impossible to directly compare template
5253/// parameters from different dependent contexts: injected class name
5254/// types can only occur within the scope of a particular templated
5255/// declaration, and within that scope every template specialization
5256/// will canonicalize to the injected class name (when appropriate
5257/// according to the rules of the language).
5258class InjectedClassNameType : public Type {
friend class ASTContext; // ASTContext creates these.
friend class ASTNodeImporter;
friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not
                        // currently suitable for AST reading, too much
                        // interdependencies.
template <class T> friend class serialization::AbstractTypeReader;

CXXRecordDecl *Decl;

/// The template specialization which this type represents.
/// For example, in
///   template <class T> class A { ... };
/// this is A<T>, whereas in
///   template <class X, class Y> class A<B<X,Y> > { ... };
/// this is A<B<X,Y> >.
///
/// It is always unqualified, always a template specialization type,
/// and always dependent.
QualType InjectedType;

InjectedClassNameType(CXXRecordDecl *D, QualType TST)
    : Type(InjectedClassName, QualType(),
           TypeDependence::DependentInstantiation),
      Decl(D), InjectedType(TST) {
  assert(isa<TemplateSpecializationType>(TST))((void)0);
  assert(!TST.hasQualifiers())((void)0);
  assert(TST->isDependentType())((void)0);
}

5288public:
QualType getInjectedSpecializationType() const { return InjectedType; }

const TemplateSpecializationType *getInjectedTST() const {
  return cast<TemplateSpecializationType>(InjectedType.getTypePtr());
}

TemplateName getTemplateName() const {
  return getInjectedTST()->getTemplateName();
}

CXXRecordDecl *getDecl() const;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == InjectedClassName;
}
5307};

5309/// The kind of a tag type.
5310enum TagTypeKind {
/// The "struct" keyword.
TTK_Struct,

/// The "__interface" keyword.
TTK_Interface,

/// The "union" keyword.
TTK_Union,

/// The "class" keyword.
TTK_Class,

/// The "enum" keyword.
TTK_Enum
5325};

5327/// The elaboration keyword that precedes a qualified type name or
5328/// introduces an elaborated-type-specifier.
5329enum ElaboratedTypeKeyword {
/// The "struct" keyword introduces the elaborated-type-specifier.
ETK_Struct,

/// The "__interface" keyword introduces the elaborated-type-specifier.
ETK_Interface,

/// The "union" keyword introduces the elaborated-type-specifier.
ETK_Union,

/// The "class" keyword introduces the elaborated-type-specifier.
ETK_Class,

/// The "enum" keyword introduces the elaborated-type-specifier.
ETK_Enum,

/// The "typename" keyword precedes the qualified type name, e.g.,
/// \c typename T::type.
ETK_Typename,

/// No keyword precedes the qualified type name.
ETK_None
5351};

5353/// A helper class for Type nodes having an ElaboratedTypeKeyword.
5354/// The keyword in stored in the free bits of the base class.
5355/// Also provides a few static helpers for converting and printing
5356/// elaborated type keyword and tag type kind enumerations.
5357class TypeWithKeyword : public Type {
5358protected:
TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc,
                QualType Canonical, TypeDependence Dependence)
    : Type(tc, Canonical, Dependence) {
  TypeWithKeywordBits.Keyword = Keyword;
}

5365public:
ElaboratedTypeKeyword getKeyword() const {
  return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword);
}

/// Converts a type specifier (DeclSpec::TST) into an elaborated type keyword.
static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec);

/// Converts a type specifier (DeclSpec::TST) into a tag type kind.
/// It is an error to provide a type specifier which *isn't* a tag kind here.
static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec);

/// Converts a TagTypeKind into an elaborated type keyword.
static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag);

/// Converts an elaborated type keyword into a TagTypeKind.
/// It is an error to provide an elaborated type keyword
/// which *isn't* a tag kind here.
static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword);

static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword);

static StringRef getKeywordName(ElaboratedTypeKeyword Keyword);

static StringRef getTagTypeKindName(TagTypeKind Kind) {
  return getKeywordName(getKeywordForTagTypeKind(Kind));
}

class CannotCastToThisType {};
static CannotCastToThisType classof(const Type *);
5395};

5397/// Represents a type that was referred to using an elaborated type
5398/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type,
5399/// or both.
5400///
5401/// This type is used to keep track of a type name as written in the
5402/// source code, including tag keywords and any nested-name-specifiers.
5403/// The type itself is always "sugar", used to express what was written
5404/// in the source code but containing no additional semantic information.
5405class ElaboratedType final
  : public TypeWithKeyword,
    public llvm::FoldingSetNode,
    private llvm::TrailingObjects<ElaboratedType, TagDecl *> {
friend class ASTContext; // ASTContext creates these
friend TrailingObjects;

/// The nested name specifier containing the qualifier.
NestedNameSpecifier *NNS;

/// The type that this qualified name refers to.
QualType NamedType;

/// The (re)declaration of this tag type owned by this occurrence is stored
/// as a trailing object if there is one. Use getOwnedTagDecl to obtain
/// it, or obtain a null pointer if there is none.

ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS,
               QualType NamedType, QualType CanonType, TagDecl *OwnedTagDecl)
    : TypeWithKeyword(Keyword, Elaborated, CanonType,
                      // Any semantic dependence on the qualifier will have
                      // been incorporated into NamedType. We still need to
                      // track syntactic (instantiation / error / pack)
                      // dependence on the qualifier.
                      NamedType->getDependence() |
                          (NNS ? toSyntacticDependence(
                                     toTypeDependence(NNS->getDependence()))
                               : TypeDependence::None)),
      NNS(NNS), NamedType(NamedType) {
  ElaboratedTypeBits.HasOwnedTagDecl = false;
  if (OwnedTagDecl) {
    ElaboratedTypeBits.HasOwnedTagDecl = true;
    *getTrailingObjects<TagDecl *>() = OwnedTagDecl;
  }
  assert(!(Keyword == ETK_None && NNS == nullptr) &&((void)0)
         "ElaboratedType cannot have elaborated type keyword "((void)0)
         "and name qualifier both null.")((void)0);
}

5444public:
/// Retrieve the qualification on this type.
NestedNameSpecifier *getQualifier() const { return NNS; }

/// Retrieve the type named by the qualified-id.
QualType getNamedType() const { return NamedType; }

/// Remove a single level of sugar.
QualType desugar() const { return getNamedType(); }

/// Returns whether this type directly provides sugar.
bool isSugared() const { return true; }

/// Return the (re)declaration of this type owned by this occurrence of this
/// type, or nullptr if there is none.
TagDecl *getOwnedTagDecl() const {
  return ElaboratedTypeBits.HasOwnedTagDecl ? *getTrailingObjects<TagDecl *>()
                                            : nullptr;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getKeyword(), NNS, NamedType, getOwnedTagDecl());
}

static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword,
                    NestedNameSpecifier *NNS, QualType NamedType,
                    TagDecl *OwnedTagDecl) {
  ID.AddInteger(Keyword);
  ID.AddPointer(NNS);
  NamedType.Profile(ID);
  ID.AddPointer(OwnedTagDecl);
}

static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; }
5478};

5480/// Represents a qualified type name for which the type name is
5481/// dependent.
5482///
5483/// DependentNameType represents a class of dependent types that involve a
5484/// possibly dependent nested-name-specifier (e.g., "T::") followed by a
5485/// name of a type. The DependentNameType may start with a "typename" (for a
5486/// typename-specifier), "class", "struct", "union", or "enum" (for a
5487/// dependent elaborated-type-specifier), or nothing (in contexts where we
5488/// know that we must be referring to a type, e.g., in a base class specifier).
5489/// Typically the nested-name-specifier is dependent, but in MSVC compatibility
5490/// mode, this type is used with non-dependent names to delay name lookup until
5491/// instantiation.
5492class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

/// The nested name specifier containing the qualifier.
NestedNameSpecifier *NNS;

/// The type that this typename specifier refers to.
const IdentifierInfo *Name;

DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS,
                  const IdentifierInfo *Name, QualType CanonType)
    : TypeWithKeyword(Keyword, DependentName, CanonType,
                      TypeDependence::DependentInstantiation |
                          toTypeDependence(NNS->getDependence())),
      NNS(NNS), Name(Name) {}

5508public:
/// Retrieve the qualification on this type.
NestedNameSpecifier *getQualifier() const { return NNS; }

/// Retrieve the type named by the typename specifier as an identifier.
///
/// This routine will return a non-NULL identifier pointer when the
/// form of the original typename was terminated by an identifier,
/// e.g., "typename T::type".
const IdentifierInfo *getIdentifier() const {
  return Name;
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getKeyword(), NNS, Name);
}

static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword,
                    NestedNameSpecifier *NNS, const IdentifierInfo *Name) {
  ID.AddInteger(Keyword);
  ID.AddPointer(NNS);
  ID.AddPointer(Name);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentName;
}
5538};

5540/// Represents a template specialization type whose template cannot be
5541/// resolved, e.g.
5542///   A<T>::template B<T>
5543class alignas(8) DependentTemplateSpecializationType
  : public TypeWithKeyword,
    public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

/// The nested name specifier containing the qualifier.
NestedNameSpecifier *NNS;

/// The identifier of the template.
const IdentifierInfo *Name;

DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword,
                                    NestedNameSpecifier *NNS,
                                    const IdentifierInfo *Name,
                                    ArrayRef<TemplateArgument> Args,
                                    QualType Canon);

const TemplateArgument *getArgBuffer() const {
  return reinterpret_cast<const TemplateArgument*>(this+1);
}

TemplateArgument *getArgBuffer() {
  return reinterpret_cast<TemplateArgument*>(this+1);
}

5568public:
NestedNameSpecifier *getQualifier() const { return NNS; }
const IdentifierInfo *getIdentifier() const { return Name; }

/// Retrieve the template arguments.
const TemplateArgument *getArgs() const {
  return getArgBuffer();
}

/// Retrieve the number of template arguments.
unsigned getNumArgs() const {
  return DependentTemplateSpecializationTypeBits.NumArgs;
}

const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h

ArrayRef<TemplateArgument> template_arguments() const {
  return {getArgs(), getNumArgs()};
}

using iterator = const TemplateArgument *;

iterator begin() const { return getArgs(); }
iterator end() const; // inline in TemplateBase.h

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) {
  Profile(ID, Context, getKeyword(), NNS, Name, {getArgs(), getNumArgs()});
}

static void Profile(llvm::FoldingSetNodeID &ID,
                    const ASTContext &Context,
                    ElaboratedTypeKeyword Keyword,
                    NestedNameSpecifier *Qualifier,
                    const IdentifierInfo *Name,
                    ArrayRef<TemplateArgument> Args);

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentTemplateSpecialization;
}
5610};

5612/// Represents a pack expansion of types.
5613///
5614/// Pack expansions are part of C++11 variadic templates. A pack
5615/// expansion contains a pattern, which itself contains one or more
5616/// "unexpanded" parameter packs. When instantiated, a pack expansion
5617/// produces a series of types, each instantiated from the pattern of
5618/// the expansion, where the Ith instantiation of the pattern uses the
5619/// Ith arguments bound to each of the unexpanded parameter packs. The
5620/// pack expansion is considered to "expand" these unexpanded
5621/// parameter packs.
5622///
5623/// \code
5624/// template<typename ...Types> struct tuple;
5625///
5626/// template<typename ...Types>
5627/// struct tuple_of_references {
5628///   typedef tuple<Types&...> type;
5629/// };
5630/// \endcode
5631///
5632/// Here, the pack expansion \c Types&... is represented via a
5633/// PackExpansionType whose pattern is Types&.
5634class PackExpansionType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

/// The pattern of the pack expansion.
QualType Pattern;

PackExpansionType(QualType Pattern, QualType Canon,
                  Optional<unsigned> NumExpansions)
    : Type(PackExpansion, Canon,
           (Pattern->getDependence() | TypeDependence::Dependent |
            TypeDependence::Instantiation) &
               ~TypeDependence::UnexpandedPack),
      Pattern(Pattern) {
  PackExpansionTypeBits.NumExpansions =
      NumExpansions ? *NumExpansions + 1 : 0;
}

5651public:
/// Retrieve the pattern of this pack expansion, which is the
/// type that will be repeatedly instantiated when instantiating the
/// pack expansion itself.
QualType getPattern() const { return Pattern; }

/// Retrieve the number of expansions that this pack expansion will
/// generate, if known.
Optional<unsigned> getNumExpansions() const {
  if (PackExpansionTypeBits.NumExpansions)
    return PackExpansionTypeBits.NumExpansions - 1;
  return None;
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getPattern(), getNumExpansions());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern,
                    Optional<unsigned> NumExpansions) {
  ID.AddPointer(Pattern.getAsOpaquePtr());
  ID.AddBoolean(NumExpansions.hasValue());
  if (NumExpansions)
    ID.AddInteger(*NumExpansions);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == PackExpansion;
}
5683};

5685/// This class wraps the list of protocol qualifiers. For types that can
5686/// take ObjC protocol qualifers, they can subclass this class.
5687template <class T>
5688class ObjCProtocolQualifiers {
5689protected:
ObjCProtocolQualifiers() = default;

ObjCProtocolDecl * const *getProtocolStorage() const {
  return const_cast<ObjCProtocolQualifiers*>(this)->getProtocolStorage();
}

ObjCProtocolDecl **getProtocolStorage() {
  return static_cast<T*>(this)->getProtocolStorageImpl();
}

void setNumProtocols(unsigned N) {
  static_cast<T*>(this)->setNumProtocolsImpl(N);
}

void initialize(ArrayRef<ObjCProtocolDecl *> protocols) {
  setNumProtocols(protocols.size());
  assert(getNumProtocols() == protocols.size() &&((void)0)
         "bitfield overflow in protocol count")((void)0);
  if (!protocols.empty())
    memcpy(getProtocolStorage(), protocols.data(),
           protocols.size() * sizeof(ObjCProtocolDecl*));
}

5713public:
using qual_iterator = ObjCProtocolDecl * const *;
using qual_range = llvm::iterator_range<qual_iterator>;

qual_range quals() const { return qual_range(qual_begin(), qual_end()); }
qual_iterator qual_begin() const { return getProtocolStorage(); }
qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); }

bool qual_empty() const { return getNumProtocols() == 0; }

/// Return the number of qualifying protocols in this type, or 0 if
/// there are none.
unsigned getNumProtocols() const {
  return static_cast<const T*>(this)->getNumProtocolsImpl();
}

/// Fetch a protocol by index.
ObjCProtocolDecl *getProtocol(unsigned I) const {
  assert(I < getNumProtocols() && "Out-of-range protocol access")((void)0);
  return qual_begin()[I];
}

/// Retrieve all of the protocol qualifiers.
ArrayRef<ObjCProtocolDecl *> getProtocols() const {
  return ArrayRef<ObjCProtocolDecl *>(qual_begin(), getNumProtocols());
}
5739};

5741/// Represents a type parameter type in Objective C. It can take
5742/// a list of protocols.
5743class ObjCTypeParamType : public Type,
                        public ObjCProtocolQualifiers<ObjCTypeParamType>,
                        public llvm::FoldingSetNode {
friend class ASTContext;
friend class ObjCProtocolQualifiers<ObjCTypeParamType>;

/// The number of protocols stored on this type.
unsigned NumProtocols : 6;

ObjCTypeParamDecl *OTPDecl;

/// The protocols are stored after the ObjCTypeParamType node. In the
/// canonical type, the list of protocols are sorted alphabetically
/// and uniqued.
ObjCProtocolDecl **getProtocolStorageImpl();

/// Return the number of qualifying protocols in this interface type,
/// or 0 if there are none.
unsigned getNumProtocolsImpl() const {
  return NumProtocols;
}

void setNumProtocolsImpl(unsigned N) {
  NumProtocols = N;
}

ObjCTypeParamType(const ObjCTypeParamDecl *D,
                  QualType can,
                  ArrayRef<ObjCProtocolDecl *> protocols);

5773public:
bool isSugared() const { return true; }
QualType desugar() const { return getCanonicalTypeInternal(); }

static bool classof(const Type *T) {
  return T->getTypeClass() == ObjCTypeParam;
}

void Profile(llvm::FoldingSetNodeID &ID);
static void Profile(llvm::FoldingSetNodeID &ID,
                    const ObjCTypeParamDecl *OTPDecl,
                    QualType CanonicalType,
                    ArrayRef<ObjCProtocolDecl *> protocols);

ObjCTypeParamDecl *getDecl() const { return OTPDecl; }
5788};

5790/// Represents a class type in Objective C.
5791///
5792/// Every Objective C type is a combination of a base type, a set of
5793/// type arguments (optional, for parameterized classes) and a list of
5794/// protocols.
5795///
5796/// Given the following declarations:
5797/// \code
5798///   \@class C<T>;
5799///   \@protocol P;
5800/// \endcode
5801///
5802/// 'C' is an ObjCInterfaceType C.  It is sugar for an ObjCObjectType
5803/// with base C and no protocols.
5804///
5805/// 'C<P>' is an unspecialized ObjCObjectType with base C and protocol list [P].
5806/// 'C<C*>' is a specialized ObjCObjectType with type arguments 'C*' and no
5807/// protocol list.
5808/// 'C<C*><P>' is a specialized ObjCObjectType with base C, type arguments 'C*',
5809/// and protocol list [P].
5810///
5811/// 'id' is a TypedefType which is sugar for an ObjCObjectPointerType whose
5812/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType
5813/// and no protocols.
5814///
5815/// 'id<P>' is an ObjCObjectPointerType whose pointee is an ObjCObjectType
5816/// with base BuiltinType::ObjCIdType and protocol list [P].  Eventually
5817/// this should get its own sugar class to better represent the source.
5818class ObjCObjectType : public Type,
                     public ObjCProtocolQualifiers<ObjCObjectType> {
friend class ObjCProtocolQualifiers<ObjCObjectType>;

// ObjCObjectType.NumTypeArgs - the number of type arguments stored
// after the ObjCObjectPointerType node.
// ObjCObjectType.NumProtocols - the number of protocols stored
// after the type arguments of ObjCObjectPointerType node.
//
// These protocols are those written directly on the type.  If
// protocol qualifiers ever become additive, the iterators will need
// to get kindof complicated.
//
// In the canonical object type, these are sorted alphabetically
// and uniqued.

/// Either a BuiltinType or an InterfaceType or sugar for either.
QualType BaseType;

/// Cached superclass type.
mutable llvm::PointerIntPair<const ObjCObjectType *, 1, bool>
  CachedSuperClassType;

QualType *getTypeArgStorage();
const QualType *getTypeArgStorage() const {
  return const_cast<ObjCObjectType *>(this)->getTypeArgStorage();
}

ObjCProtocolDecl **getProtocolStorageImpl();
/// Return the number of qualifying protocols in this interface type,
/// or 0 if there are none.
unsigned getNumProtocolsImpl() const {
  return ObjCObjectTypeBits.NumProtocols;
}
void setNumProtocolsImpl(unsigned N) {
  ObjCObjectTypeBits.NumProtocols = N;
}

5856protected:
enum Nonce_ObjCInterface { Nonce_ObjCInterface };

ObjCObjectType(QualType Canonical, QualType Base,
               ArrayRef<QualType> typeArgs,
               ArrayRef<ObjCProtocolDecl *> protocols,
               bool isKindOf);

ObjCObjectType(enum Nonce_ObjCInterface)
    : Type(ObjCInterface, QualType(), TypeDependence::None),
      BaseType(QualType(this_(), 0)) {
  ObjCObjectTypeBits.NumProtocols = 0;
  ObjCObjectTypeBits.NumTypeArgs = 0;
  ObjCObjectTypeBits.IsKindOf = 0;
}

void computeSuperClassTypeSlow() const;

5874public:
/// Gets the base type of this object type.  This is always (possibly
/// sugar for) one of:
///  - the 'id' builtin type (as opposed to the 'id' type visible to the
///    user, which is a typedef for an ObjCObjectPointerType)
///  - the 'Class' builtin type (same caveat)
///  - an ObjCObjectType (currently always an ObjCInterfaceType)
QualType getBaseType() const { return BaseType; }

bool isObjCId() const {
  return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId);
}

bool isObjCClass() const {
  return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass);
}

bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); }
bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); }
bool isObjCUnqualifiedIdOrClass() const {
  if (!qual_empty()) return false;
  if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>())
    return T->getKind() == BuiltinType::ObjCId ||
           T->getKind() == BuiltinType::ObjCClass;
  return false;
}
bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); }
bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); }

/// Gets the interface declaration for this object type, if the base type
/// really is an interface.
ObjCInterfaceDecl *getInterface() const;

/// Determine whether this object type is "specialized", meaning
/// that it has type arguments.
bool isSpecialized() const;

/// Determine whether this object type was written with type arguments.
bool isSpecializedAsWritten() const {
  return ObjCObjectTypeBits.NumTypeArgs > 0;
}

/// Determine whether this object type is "unspecialized", meaning
/// that it has no type arguments.
bool isUnspecialized() const { return !isSpecialized(); }

/// Determine whether this object type is "unspecialized" as
/// written, meaning that it has no type arguments.
bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); }

/// Retrieve the type arguments of this object type (semantically).
ArrayRef<QualType> getTypeArgs() const;

/// Retrieve the type arguments of this object type as they were
/// written.
ArrayRef<QualType> getTypeArgsAsWritten() const {
  return llvm::makeArrayRef(getTypeArgStorage(),
                            ObjCObjectTypeBits.NumTypeArgs);
}

/// Whether this is a "__kindof" type as written.
bool isKindOfTypeAsWritten() const { return ObjCObjectTypeBits.IsKindOf; }

/// Whether this ia a "__kindof" type (semantically).
bool isKindOfType() const;

/// Retrieve the type of the superclass of this object type.
///
/// This operation substitutes any type arguments into the
/// superclass of the current class type, potentially producing a
/// specialization of the superclass type. Produces a null type if
/// there is no superclass.
QualType getSuperClassType() const {
  if (!CachedSuperClassType.getInt())
    computeSuperClassTypeSlow();

  assert(CachedSuperClassType.getInt() && "Superclass not set?")((void)0);
  return QualType(CachedSuperClassType.getPointer(), 0);
}

/// Strip off the Objective-C "kindof" type and (with it) any
/// protocol qualifiers.
QualType stripObjCKindOfTypeAndQuals(const ASTContext &ctx) const;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == ObjCObject ||
         T->getTypeClass() == ObjCInterface;
}
5965};

5967/// A class providing a concrete implementation
5968/// of ObjCObjectType, so as to not increase the footprint of
5969/// ObjCInterfaceType.  Code outside of ASTContext and the core type
5970/// system should not reference this type.
5971class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode {
friend class ASTContext;

// If anyone adds fields here, ObjCObjectType::getProtocolStorage()
// will need to be modified.

ObjCObjectTypeImpl(QualType Canonical, QualType Base,
                   ArrayRef<QualType> typeArgs,
                   ArrayRef<ObjCProtocolDecl *> protocols,
                   bool isKindOf)
    : ObjCObjectType(Canonical, Base, typeArgs, protocols, isKindOf) {}

5983public:
void Profile(llvm::FoldingSetNodeID &ID);
static void Profile(llvm::FoldingSetNodeID &ID,
                    QualType Base,
                    ArrayRef<QualType> typeArgs,
                    ArrayRef<ObjCProtocolDecl *> protocols,
                    bool isKindOf);
5990};

5992inline QualType *ObjCObjectType::getTypeArgStorage() {
return reinterpret_cast<QualType *>(static_cast<ObjCObjectTypeImpl*>(this)+1);
5994}

5996inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorageImpl() {
  return reinterpret_cast<ObjCProtocolDecl**>(
           getTypeArgStorage() + ObjCObjectTypeBits.NumTypeArgs);
5999}

6001inline ObjCProtocolDecl **ObjCTypeParamType::getProtocolStorageImpl() {
  return reinterpret_cast<ObjCProtocolDecl**>(
           static_cast<ObjCTypeParamType*>(this)+1);
6004}

6006/// Interfaces are the core concept in Objective-C for object oriented design.
6007/// They basically correspond to C++ classes.  There are two kinds of interface
6008/// types: normal interfaces like `NSString`, and qualified interfaces, which
6009/// are qualified with a protocol list like `NSString<NSCopyable, NSAmazing>`.
6010///
6011/// ObjCInterfaceType guarantees the following properties when considered
6012/// as a subtype of its superclass, ObjCObjectType:
6013///   - There are no protocol qualifiers.  To reinforce this, code which
6014///     tries to invoke the protocol methods via an ObjCInterfaceType will
6015///     fail to compile.
6016///   - It is its own base type.  That is, if T is an ObjCInterfaceType*,
6017///     T->getBaseType() == QualType(T, 0).
6018class ObjCInterfaceType : public ObjCObjectType {
friend class ASTContext; // ASTContext creates these.
friend class ASTReader;
friend class ObjCInterfaceDecl;
template <class T> friend class serialization::AbstractTypeReader;

mutable ObjCInterfaceDecl *Decl;

ObjCInterfaceType(const ObjCInterfaceDecl *D)
    : ObjCObjectType(Nonce_ObjCInterface),
      Decl(const_cast<ObjCInterfaceDecl*>(D)) {}

6030public:
/// Get the declaration of this interface.
ObjCInterfaceDecl *getDecl() const { return Decl; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == ObjCInterface;
}

// Nonsense to "hide" certain members of ObjCObjectType within this
// class.  People asking for protocols on an ObjCInterfaceType are
// not going to get what they want: ObjCInterfaceTypes are
// guaranteed to have no protocols.
enum {
  qual_iterator,
  qual_begin,
  qual_end,
  getNumProtocols,
  getProtocol
};
6052};

6054inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const {
QualType baseType = getBaseType();
while (const auto *ObjT = baseType->getAs<ObjCObjectType>()) {
  if (const auto *T = dyn_cast<ObjCInterfaceType>(ObjT))
    return T->getDecl();

  baseType = ObjT->getBaseType();
}

return nullptr;
6064}

6066/// Represents a pointer to an Objective C object.
6067///
6068/// These are constructed from pointer declarators when the pointee type is
6069/// an ObjCObjectType (or sugar for one).  In addition, the 'id' and 'Class'
6070/// types are typedefs for these, and the protocol-qualified types 'id<P>'
6071/// and 'Class<P>' are translated into these.
6072///
6073/// Pointers to pointers to Objective C objects are still PointerTypes;
6074/// only the first level of pointer gets it own type implementation.
6075class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType PointeeType;

ObjCObjectPointerType(QualType Canonical, QualType Pointee)
    : Type(ObjCObjectPointer, Canonical, Pointee->getDependence()),
      PointeeType(Pointee) {}

6084public:
/// Gets the type pointed to by this ObjC pointer.
/// The result will always be an ObjCObjectType or sugar thereof.
QualType getPointeeType() const { return PointeeType; }

/// Gets the type pointed to by this ObjC pointer.  Always returns non-null.
///
/// This method is equivalent to getPointeeType() except that
/// it discards any typedefs (or other sugar) between this
/// type and the "outermost" object type.  So for:
/// \code
///   \@class A; \@protocol P; \@protocol Q;
///   typedef A<P> AP;
///   typedef A A1;
///   typedef A1<P> A1P;
///   typedef A1P<Q> A1PQ;
/// \endcode
/// For 'A*', getObjectType() will return 'A'.
/// For 'A<P>*', getObjectType() will return 'A<P>'.
/// For 'AP*', getObjectType() will return 'A<P>'.
/// For 'A1*', getObjectType() will return 'A'.
/// For 'A1<P>*', getObjectType() will return 'A1<P>'.
/// For 'A1P*', getObjectType() will return 'A1<P>'.
/// For 'A1PQ*', getObjectType() will return 'A1<Q>', because
///   adding protocols to a protocol-qualified base discards the
///   old qualifiers (for now).  But if it didn't, getObjectType()
///   would return 'A1P<Q>' (and we'd have to make iterating over
///   qualifiers more complicated).
const ObjCObjectType *getObjectType() const {
  return PointeeType->castAs<ObjCObjectType>();
}

/// If this pointer points to an Objective C
/// \@interface type, gets the type for that interface.  Any protocol
/// qualifiers on the interface are ignored.
///
/// \return null if the base type for this pointer is 'id' or 'Class'
const ObjCInterfaceType *getInterfaceType() const;

/// If this pointer points to an Objective \@interface
/// type, gets the declaration for that interface.
///
/// \return null if the base type for this pointer is 'id' or 'Class'
ObjCInterfaceDecl *getInterfaceDecl() const {
  return getObjectType()->getInterface();
}

/// True if this is equivalent to the 'id' type, i.e. if
/// its object type is the primitive 'id' type with no protocols.
bool isObjCIdType() const {
  return getObjectType()->isObjCUnqualifiedId();
}

/// True if this is equivalent to the 'Class' type,
/// i.e. if its object tive is the primitive 'Class' type with no protocols.
bool isObjCClassType() const {
  return getObjectType()->isObjCUnqualifiedClass();
}

/// True if this is equivalent to the 'id' or 'Class' type,
bool isObjCIdOrClassType() const {
  return getObjectType()->isObjCUnqualifiedIdOrClass();
}

/// True if this is equivalent to 'id<P>' for some non-empty set of
/// protocols.
bool isObjCQualifiedIdType() const {
  return getObjectType()->isObjCQualifiedId();
}

/// True if this is equivalent to 'Class<P>' for some non-empty set of
/// protocols.
bool isObjCQualifiedClassType() const {
  return getObjectType()->isObjCQualifiedClass();
}

/// Whether this is a "__kindof" type.
bool isKindOfType() const { return getObjectType()->isKindOfType(); }

/// Whether this type is specialized, meaning that it has type arguments.
bool isSpecialized() const { return getObjectType()->isSpecialized(); }

/// Whether this type is specialized, meaning that it has type arguments.
bool isSpecializedAsWritten() const {
  return getObjectType()->isSpecializedAsWritten();
}

/// Whether this type is unspecialized, meaning that is has no type arguments.
bool isUnspecialized() const { return getObjectType()->isUnspecialized(); }

/// Determine whether this object type is "unspecialized" as
/// written, meaning that it has no type arguments.
bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); }

/// Retrieve the type arguments for this type.
ArrayRef<QualType> getTypeArgs() const {
  return getObjectType()->getTypeArgs();
}

/// Retrieve the type arguments for this type.
ArrayRef<QualType> getTypeArgsAsWritten() const {
  return getObjectType()->getTypeArgsAsWritten();
}

/// An iterator over the qualifiers on the object type.  Provided
/// for convenience.  This will always iterate over the full set of
/// protocols on a type, not just those provided directly.
using qual_iterator = ObjCObjectType::qual_iterator;
using qual_range = llvm::iterator_range<qual_iterator>;

qual_range quals() const { return qual_range(qual_begin(), qual_end()); }

qual_iterator qual_begin() const {
  return getObjectType()->qual_begin();
}

qual_iterator qual_end() const {
  return getObjectType()->qual_end();
}

bool qual_empty() const { return getObjectType()->qual_empty(); }

/// Return the number of qualifying protocols on the object type.
unsigned getNumProtocols() const {
  return getObjectType()->getNumProtocols();
}

/// Retrieve a qualifying protocol by index on the object type.
ObjCProtocolDecl *getProtocol(unsigned I) const {
  return getObjectType()->getProtocol(I);
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

/// Retrieve the type of the superclass of this object pointer type.
///
/// This operation substitutes any type arguments into the
/// superclass of the current class type, potentially producing a
/// pointer to a specialization of the superclass type. Produces a
/// null type if there is no superclass.
QualType getSuperClassType() const;

/// Strip off the Objective-C "kindof" type and (with it) any
/// protocol qualifiers.
const ObjCObjectPointerType *stripObjCKindOfTypeAndQuals(
                               const ASTContext &ctx) const;

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getPointeeType());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType T) {
  ID.AddPointer(T.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == ObjCObjectPointer;
}
6243};

6245class AtomicType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType ValueType;

AtomicType(QualType ValTy, QualType Canonical)
    : Type(Atomic, Canonical, ValTy->getDependence()), ValueType(ValTy) {}

6253public:
/// Gets the type contained by this atomic type, i.e.
/// the type returned by performing an atomic load of this atomic type.
QualType getValueType() const { return ValueType; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getValueType());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType T) {
  ID.AddPointer(T.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Atomic;
}
6272};

6274/// PipeType - OpenCL20.
6275class PipeType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType ElementType;
bool isRead;

PipeType(QualType elemType, QualType CanonicalPtr, bool isRead)
    : Type(Pipe, CanonicalPtr, elemType->getDependence()),
      ElementType(elemType), isRead(isRead) {}

6285public:
QualType getElementType() const { return ElementType; }

bool isSugared() const { return false; }

QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getElementType(), isReadOnly());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType T, bool isRead) {
  ID.AddPointer(T.getAsOpaquePtr());
  ID.AddBoolean(isRead);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Pipe;
}

bool isReadOnly() const { return isRead; }
6306};

6308/// A fixed int type of a specified bitwidth.
6309class ExtIntType final : public Type, public llvm::FoldingSetNode {
friend class ASTContext;
unsigned IsUnsigned : 1;
unsigned NumBits : 24;

6314protected:
ExtIntType(bool isUnsigned, unsigned NumBits);

6317public:
bool isUnsigned() const { return IsUnsigned; }
bool isSigned() const { return !IsUnsigned; }
unsigned getNumBits() const { return NumBits; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, isUnsigned(), getNumBits());
}

static void Profile(llvm::FoldingSetNodeID &ID, bool IsUnsigned,
                    unsigned NumBits) {
  ID.AddBoolean(IsUnsigned);
  ID.AddInteger(NumBits);
}

static bool classof(const Type *T) { return T->getTypeClass() == ExtInt; }
6336};

6338class DependentExtIntType final : public Type, public llvm::FoldingSetNode {
friend class ASTContext;
const ASTContext &Context;
llvm::PointerIntPair<Expr*, 1, bool> ExprAndUnsigned;

6343protected:
DependentExtIntType(const ASTContext &Context, bool IsUnsigned,
                    Expr *NumBits);

6347public:
bool isUnsigned() const;
bool isSigned() const { return !isUnsigned(); }
Expr *getNumBitsExpr() const;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, isUnsigned(), getNumBitsExpr());
}
static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    bool IsUnsigned, Expr *NumBitsExpr);

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentExtInt;
}
6364};

6366/// A qualifier set is used to build a set of qualifiers.
6367class QualifierCollector : public Qualifiers {
6368public:
QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {}

/// Collect any qualifiers on the given type and return an
/// unqualified type.  The qualifiers are assumed to be consistent
/// with those already in the type.
const Type *strip(QualType type) {
  addFastQualifiers(type.getLocalFastQualifiers());
  if (!type.hasLocalNonFastQualifiers())
    return type.getTypePtrUnsafe();

  const ExtQuals *extQuals = type.getExtQualsUnsafe();
  addConsistentQualifiers(extQuals->getQualifiers());
  return extQuals->getBaseType();
}

/// Apply the collected qualifiers to the given type.
QualType apply(const ASTContext &Context, QualType QT) const;

/// Apply the collected qualifiers to the given type.
QualType apply(const ASTContext &Context, const Type* T) const;
6389};

6391/// A container of type source information.
6392///
6393/// A client can read the relevant info using TypeLoc wrappers, e.g:
6394/// @code
6395/// TypeLoc TL = TypeSourceInfo->getTypeLoc();
6396/// TL.getBeginLoc().print(OS, SrcMgr);
6397/// @endcode
6398class alignas(8) TypeSourceInfo {
// Contains a memory block after the class, used for type source information,
// allocated by ASTContext.
friend class ASTContext;

QualType Ty;

TypeSourceInfo(QualType ty) : Ty(ty) {}

6407public:
/// Return the type wrapped by this type source info.
QualType getType() const { return Ty; }

/// Return the TypeLoc wrapper for the type source info.
TypeLoc getTypeLoc() const; // implemented in TypeLoc.h

/// Override the type stored in this TypeSourceInfo. Use with caution!
void overrideType(QualType T) { Ty = T; }
6416};

6418// Inline function definitions.

6420inline SplitQualType SplitQualType::getSingleStepDesugaredType() const {
SplitQualType desugar =
  Ty->getLocallyUnqualifiedSingleStepDesugaredType().split();
desugar.Quals.addConsistentQualifiers(Quals);
return desugar;
6425}

6427inline const Type *QualType::getTypePtr() const {
return getCommonPtr()->BaseType;
6429}

6431inline const Type *QualType::getTypePtrOrNull() const {
return (isNull() ? nullptr : getCommonPtr()->BaseType);
6433}

6435inline SplitQualType QualType::split() const {
if (!hasLocalNonFastQualifiers())
  return SplitQualType(getTypePtrUnsafe(),
                       Qualifiers::fromFastMask(getLocalFastQualifiers()));

const ExtQuals *eq = getExtQualsUnsafe();
Qualifiers qs = eq->getQualifiers();
qs.addFastQualifiers(getLocalFastQualifiers());
return SplitQualType(eq->getBaseType(), qs);
6444}

6446inline Qualifiers QualType::getLocalQualifiers() const {
Qualifiers Quals;
if (hasLocalNonFastQualifiers())
  Quals = getExtQualsUnsafe()->getQualifiers();
Quals.addFastQualifiers(getLocalFastQualifiers());
return Quals;
6452}

6454inline Qualifiers QualType::getQualifiers() const {
Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers();
quals.addFastQualifiers(getLocalFastQualifiers());
return quals;
6458}

6460inline unsigned QualType::getCVRQualifiers() const {
unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers();
cvr |= getLocalCVRQualifiers();
return cvr;
6464}

6466inline QualType QualType::getCanonicalType() const {
QualType canon = getCommonPtr()->CanonicalType;
return canon.withFastQualifiers(getLocalFastQualifiers());
6469}

6471inline bool QualType::isCanonical() const {
return getTypePtr()->isCanonicalUnqualified();
6473}

6475inline bool QualType::isCanonicalAsParam() const {
if (!isCanonical()) return false;
if (hasLocalQualifiers()) return false;

const Type *T = getTypePtr();
if (T->isVariablyModifiedType() && T->hasSizedVLAType())
  return false;

return !isa<FunctionType>(T) && !isa<ArrayType>(T);
6484}

6486inline bool QualType::isConstQualified() const {
return isLocalConstQualified() ||
       getCommonPtr()->CanonicalType.isLocalConstQualified();
6489}

6491inline bool QualType::isRestrictQualified() const {
return isLocalRestrictQualified() ||
       getCommonPtr()->CanonicalType.isLocalRestrictQualified();
6494}


6497inline bool QualType::isVolatileQualified() const {
return isLocalVolatileQualified() ||
       getCommonPtr()->CanonicalType.isLocalVolatileQualified();
6500}

6502inline bool QualType::hasQualifiers() const {
return hasLocalQualifiers() ||
       getCommonPtr()->CanonicalType.hasLocalQualifiers();
6505}

6507inline QualType QualType::getUnqualifiedType() const {
if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers())
  return QualType(getTypePtr(), 0);

return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0);
6512}

6514inline SplitQualType QualType::getSplitUnqualifiedType() const {
if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers())
  return split();

return getSplitUnqualifiedTypeImpl(*this);
6519}

6521inline void QualType::removeLocalConst() {
removeLocalFastQualifiers(Qualifiers::Const);
6523}

6525inline void QualType::removeLocalRestrict() {
removeLocalFastQualifiers(Qualifiers::Restrict);
6527}

6529inline void QualType::removeLocalVolatile() {
removeLocalFastQualifiers(Qualifiers::Volatile);
6531}

6533inline void QualType::removeLocalCVRQualifiers(unsigned Mask) {
assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits")((void)0);
static_assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask,
              "Fast bits differ from CVR bits!");

// Fast path: we don't need to touch the slow qualifiers.
removeLocalFastQualifiers(Mask);
6540}

6542/// Check if this type has any address space qualifier.
6543inline bool QualType::hasAddressSpace() const {
return getQualifiers().hasAddressSpace();
6545}

6547/// Return the address space of this type.
6548inline LangAS QualType::getAddressSpace() const {
return getQualifiers().getAddressSpace();
6550}

6552/// Return the gc attribute of this type.
6553inline Qualifiers::GC QualType::getObjCGCAttr() const {
return getQualifiers().getObjCGCAttr();
6555}

6557inline bool QualType::hasNonTrivialToPrimitiveDefaultInitializeCUnion() const {
if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl())
  return hasNonTrivialToPrimitiveDefaultInitializeCUnion(RD);
return false;
6561}

6563inline bool QualType::hasNonTrivialToPrimitiveDestructCUnion() const {
if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl())
  return hasNonTrivialToPrimitiveDestructCUnion(RD);
return false;
6567}

6569inline bool QualType::hasNonTrivialToPrimitiveCopyCUnion() const {
if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl())
  return hasNonTrivialToPrimitiveCopyCUnion(RD);
return false;
6573}

6575inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) {
if (const auto *PT = t.getAs<PointerType>()) {
  if (const auto *FT = PT->getPointeeType()->getAs<FunctionType>())
    return FT->getExtInfo();
} else if (const auto *FT = t.getAs<FunctionType>())
  return FT->getExtInfo();

return FunctionType::ExtInfo();
6583}

6585inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) {
return getFunctionExtInfo(*t);
6587}

6589/// Determine whether this type is more
6590/// qualified than the Other type. For example, "const volatile int"
6591/// is more qualified than "const int", "volatile int", and
6592/// "int". However, it is not more qualified than "const volatile
6593/// int".
6594inline bool QualType::isMoreQualifiedThan(QualType other) const {
Qualifiers MyQuals = getQualifiers();
Qualifiers OtherQuals = other.getQualifiers();
return (MyQuals != OtherQuals && MyQuals.compatiblyIncludes(OtherQuals));
6598}

6600/// Determine whether this type is at last
6601/// as qualified as the Other type. For example, "const volatile
6602/// int" is at least as qualified as "const int", "volatile int",
6603/// "int", and "const volatile int".
6604inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const {
Qualifiers OtherQuals = other.getQualifiers();

// Ignore __unaligned qualifier if this type is a void.
if (getUnqualifiedType()->isVoidType())
  OtherQuals.removeUnaligned();

return getQualifiers().compatiblyIncludes(OtherQuals);
6612}

6614/// If Type is a reference type (e.g., const
6615/// int&), returns the type that the reference refers to ("const
6616/// int"). Otherwise, returns the type itself. This routine is used
6617/// throughout Sema to implement C++ 5p6:
6618///
6619///   If an expression initially has the type "reference to T" (8.3.2,
6620///   8.5.3), the type is adjusted to "T" prior to any further
6621///   analysis, the expression designates the object or function
6622///   denoted by the reference, and the expression is an lvalue.
6623inline QualType QualType::getNonReferenceType() const {
if (const auto *RefType = (*this)->getAs<ReferenceType>())
  return RefType->getPointeeType();
else
  return *this;
6628}

6630inline bool QualType::isCForbiddenLValueType() const {
return ((getTypePtr()->isVoidType() && !hasQualifiers()) ||
        getTypePtr()->isFunctionType());
6633}

6635/// Tests whether the type is categorized as a fundamental type.
6636///
6637/// \returns True for types specified in C++0x [basic.fundamental].
6638inline bool Type::isFundamentalType() const {
return isVoidType() ||
       isNullPtrType() ||
       // FIXME: It's really annoying that we don't have an
       // 'isArithmeticType()' which agrees with the standard definition.
       (isArithmeticType() && !isEnumeralType());
6644}

6646/// Tests whether the type is categorized as a compound type.
6647///
6648/// \returns True for types specified in C++0x [basic.compound].
6649inline bool Type::isCompoundType() const {
// C++0x [basic.compound]p1:
//   Compound types can be constructed in the following ways:
//    -- arrays of objects of a given type [...];
return isArrayType() ||
//    -- functions, which have parameters of given types [...];
       isFunctionType() ||
//    -- pointers to void or objects or functions [...];
       isPointerType() ||
//    -- references to objects or functions of a given type. [...]
       isReferenceType() ||
//    -- classes containing a sequence of objects of various types, [...];
       isRecordType() ||
//    -- unions, which are classes capable of containing objects of different
//               types at different times;
       isUnionType() ||
//    -- enumerations, which comprise a set of named constant values. [...];
       isEnumeralType() ||
//    -- pointers to non-static class members, [...].
       isMemberPointerType();
6669}

6671inline bool Type::isFunctionType() const {
return isa<FunctionType>(CanonicalType);
6673}

6675inline bool Type::isPointerType() const {
return isa<PointerType>(CanonicalType);
6677}

6679inline bool Type::isAnyPointerType() const {
return isPointerType() || isObjCObjectPointerType();
6681}

6683inline bool Type::isBlockPointerType() const {
return isa<BlockPointerType>(CanonicalType);
6685}

6687inline bool Type::isReferenceType() const {
return isa<ReferenceType>(CanonicalType);
6689}

6691inline bool Type::isLValueReferenceType() const {
return isa<LValueReferenceType>(CanonicalType);
6693}

6695inline bool Type::isRValueReferenceType() const {
return isa<RValueReferenceType>(CanonicalType);
6697}

6699inline bool Type::isObjectPointerType() const {
// Note: an "object pointer type" is not the same thing as a pointer to an
// object type; rather, it is a pointer to an object type or a pointer to cv
// void.
if (const auto *T = getAs<PointerType>())
  return !T->getPointeeType()->isFunctionType();
else
  return false;
6707}

6709inline bool Type::isFunctionPointerType() const {
if (const auto *T = getAs<PointerType>())
  return T->getPointeeType()->isFunctionType();
else
  return false;
6714}

6716inline bool Type::isFunctionReferenceType() const {
if (const auto *T = getAs<ReferenceType>())
  return T->getPointeeType()->isFunctionType();
else
  return false;
6721}

6723inline bool Type::isMemberPointerType() const {
return isa<MemberPointerType>(CanonicalType);
6725}

6727inline bool Type::isMemberFunctionPointerType() const {
if (const auto *T = getAs<MemberPointerType>())
  return T->isMemberFunctionPointer();
else
  return false;
6732}

6734inline bool Type::isMemberDataPointerType() const {
if (const auto *T = getAs<MemberPointerType>())
  return T->isMemberDataPointer();
else
  return false;
6739}

6741inline bool Type::isArrayType() const {
return isa<ArrayType>(CanonicalType);
6743}

6745inline bool Type::isConstantArrayType() const {
return isa<ConstantArrayType>(CanonicalType);
6747}

6749inline bool Type::isIncompleteArrayType() const {
return isa<IncompleteArrayType>(CanonicalType);
6751}

6753inline bool Type::isVariableArrayType() const {
return isa<VariableArrayType>(CanonicalType);
6755}

6757inline bool Type::isDependentSizedArrayType() const {
return isa<DependentSizedArrayType>(CanonicalType);
6759}

6761inline bool Type::isBuiltinType() const {
return isa<BuiltinType>(CanonicalType);
6763}

6765inline bool Type::isRecordType() const {
return isa<RecordType>(CanonicalType);
6767}

6769inline bool Type::isEnumeralType() const {
return isa<EnumType>(CanonicalType);
6771}

6773inline bool Type::isAnyComplexType() const {
return isa<ComplexType>(CanonicalType);
6775}

6777inline bool Type::isVectorType() const {
return isa<VectorType>(CanonicalType);
6779}

6781inline bool Type::isExtVectorType() const {
return isa<ExtVectorType>(CanonicalType);
6783}

6785inline bool Type::isMatrixType() const {
return isa<MatrixType>(CanonicalType);
6787}

6789inline bool Type::isConstantMatrixType() const {
return isa<ConstantMatrixType>(CanonicalType);
6791}

6793inline bool Type::isDependentAddressSpaceType() const {
return isa<DependentAddressSpaceType>(CanonicalType);
6795}

6797inline bool Type::isObjCObjectPointerType() const {
return isa<ObjCObjectPointerType>(CanonicalType);
6799}

6801inline bool Type::isObjCObjectType() const {
return isa<ObjCObjectType>(CanonicalType);
6803}

6805inline bool Type::isObjCObjectOrInterfaceType() const {
return isa<ObjCInterfaceType>(CanonicalType) ||
  isa<ObjCObjectType>(CanonicalType);
6808}

6810inline bool Type::isAtomicType() const {
return isa<AtomicType>(CanonicalType);
6812}

6814inline bool Type::isUndeducedAutoType() const {
return isa<AutoType>(CanonicalType);
6816}

6818inline bool Type::isObjCQualifiedIdType() const {
if (const auto *OPT = getAs<ObjCObjectPointerType>())
  return OPT->isObjCQualifiedIdType();
return false;
6822}

6824inline bool Type::isObjCQualifiedClassType() const {
if (const auto *OPT = getAs<ObjCObjectPointerType>())
  return OPT->isObjCQualifiedClassType();
return false;
6828}

6830inline bool Type::isObjCIdType() const {
if (const auto *OPT = getAs<ObjCObjectPointerType>())
  return OPT->isObjCIdType();
return false;
6834}

6836inline bool Type::isObjCClassType() const {
if (const auto *OPT = getAs<ObjCObjectPointerType>())
  return OPT->isObjCClassType();
return false;
6840}

6842inline bool Type::isObjCSelType() const {
if (const auto *OPT = getAs<PointerType>())
  return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel);
return false;
6846}

6848inline bool Type::isObjCBuiltinType() const {
return isObjCIdType() || isObjCClassType() || isObjCSelType();
6850}

6852inline bool Type::isDecltypeType() const {
return isa<DecltypeType>(this);
6854}

6856#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
inline bool Type::is##Id##Type() const { \
  return isSpecificBuiltinType(BuiltinType::Id); \
}
6860#include "clang/Basic/OpenCLImageTypes.def"

6862inline bool Type::isSamplerT() const {
return isSpecificBuiltinType(BuiltinType::OCLSampler);
6864}

6866inline bool Type::isEventT() const {
return isSpecificBuiltinType(BuiltinType::OCLEvent);
6868}

6870inline bool Type::isClkEventT() const {
return isSpecificBuiltinType(BuiltinType::OCLClkEvent);
6872}

6874inline bool Type::isQueueT() const {
return isSpecificBuiltinType(BuiltinType::OCLQueue);
6876}

6878inline bool Type::isReserveIDT() const {
return isSpecificBuiltinType(BuiltinType::OCLReserveID);
6880}

6882inline bool Type::isImageType() const {
6883#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) is##Id##Type() ||
return
6885#include "clang/Basic/OpenCLImageTypes.def"
    false; // end boolean or operation
6887}

6889inline bool Type::isPipeType() const {
return isa<PipeType>(CanonicalType);
6891}

6893inline bool Type::isExtIntType() const {
return isa<ExtIntType>(CanonicalType);
6895}

6897#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
inline bool Type::is##Id##Type() const { \
  return isSpecificBuiltinType(BuiltinType::Id); \
}
6901#include "clang/Basic/OpenCLExtensionTypes.def"

6903inline bool Type::isOCLIntelSubgroupAVCType() const {
6904#define INTEL_SUBGROUP_AVC_TYPE(ExtType, Id) \
isOCLIntelSubgroupAVC##Id##Type() ||
return
6907#include "clang/Basic/OpenCLExtensionTypes.def"
  false; // end of boolean or operation
6909}

6911inline bool Type::isOCLExtOpaqueType() const {
6912#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) is##Id##Type() ||
return
6914#include "clang/Basic/OpenCLExtensionTypes.def"
  false; // end of boolean or operation
6916}

6918inline bool Type::isOpenCLSpecificType() const {
return isSamplerT() || isEventT() || isImageType() || isClkEventT() ||
       isQueueT() || isReserveIDT() || isPipeType() || isOCLExtOpaqueType();
6921}

6923inline bool Type::isTemplateTypeParmType() const {
return isa<TemplateTypeParmType>(CanonicalType);
6925}

6927inline bool Type::isSpecificBuiltinType(unsigned K) const {
if (const BuiltinType *BT = getAs<BuiltinType>()) {
  return BT->getKind() == static_cast<BuiltinType::Kind>(K);
}
return false;
6932}

6934inline bool Type::isPlaceholderType() const {
if (const auto *BT = dyn_cast<BuiltinType>(this))
  return BT->isPlaceholderType();
return false;
6938}

6940inline const BuiltinType *Type::getAsPlaceholderType() const {
if (const auto *BT = dyn_cast<BuiltinType>(this))
  if (BT->isPlaceholderType())
    return BT;
return nullptr;
6945}

6947inline bool Type::isSpecificPlaceholderType(unsigned K) const {
assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K))((void)0);
return isSpecificBuiltinType(K);
6950}

6952inline bool Type::isNonOverloadPlaceholderType() const {
if (const auto *BT = dyn_cast<BuiltinType>(this))
  return BT->isNonOverloadPlaceholderType();
return false;
6956}

6958inline bool Type::isVoidType() const {
return isSpecificBuiltinType(BuiltinType::Void);
6960}

6962inline bool Type::isHalfType() const {
// FIXME: Should we allow complex __fp16? Probably not.
return isSpecificBuiltinType(BuiltinType::Half);
6965}

6967inline bool Type::isFloat16Type() const {
return isSpecificBuiltinType(BuiltinType::Float16);
6969}

6971inline bool Type::isBFloat16Type() const {
return isSpecificBuiltinType(BuiltinType::BFloat16);
6973}

6975inline bool Type::isFloat128Type() const {
return isSpecificBuiltinType(BuiltinType::Float128);
6977}

6979inline bool Type::isNullPtrType() const {
return isSpecificBuiltinType(BuiltinType::NullPtr);
6981}

6983bool IsEnumDeclComplete(EnumDecl *);
6984bool IsEnumDeclScoped(EnumDecl *);

6986inline bool Type::isIntegerType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
  return BT->getKind() >= BuiltinType::Bool &&
         BT->getKind() <= BuiltinType::Int128;
if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
  // Incomplete enum types are not treated as integer types.
  // FIXME: In C++, enum types are never integer types.
  return IsEnumDeclComplete(ET->getDecl()) &&
    !IsEnumDeclScoped(ET->getDecl());
}
return isExtIntType();
6997}

6999inline bool Type::isFixedPointType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
  return BT->getKind() >= BuiltinType::ShortAccum &&
         BT->getKind() <= BuiltinType::SatULongFract;
}
return false;
7005}

7007inline bool Type::isFixedPointOrIntegerType() const {
return isFixedPointType() || isIntegerType();
7009}

7011inline bool Type::isSaturatedFixedPointType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
  return BT->getKind() >= BuiltinType::SatShortAccum &&
         BT->getKind() <= BuiltinType::SatULongFract;
}
return false;
7017}

7019inline bool Type::isUnsaturatedFixedPointType() const {
return isFixedPointType() && !isSaturatedFixedPointType();
7021}

7023inline bool Type::isSignedFixedPointType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
  return ((BT->getKind() >= BuiltinType::ShortAccum &&
           BT->getKind() <= BuiltinType::LongAccum) ||
          (BT->getKind() >= BuiltinType::ShortFract &&
           BT->getKind() <= BuiltinType::LongFract) ||
          (BT->getKind() >= BuiltinType::SatShortAccum &&
           BT->getKind() <= BuiltinType::SatLongAccum) ||
          (BT->getKind() >= BuiltinType::SatShortFract &&
           BT->getKind() <= BuiltinType::SatLongFract));
}
return false;
7035}

7037inline bool Type::isUnsignedFixedPointType() const {
return isFixedPointType() && !isSignedFixedPointType();
7039}

7041inline bool Type::isScalarType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
  return BT->getKind() > BuiltinType::Void &&
         BT->getKind() <= BuiltinType::NullPtr;
if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
  // Enums are scalar types, but only if they are defined.  Incomplete enums
  // are not treated as scalar types.
  return IsEnumDeclComplete(ET->getDecl());
return isa<PointerType>(CanonicalType) ||
       isa<BlockPointerType>(CanonicalType) ||
       isa<MemberPointerType>(CanonicalType) ||
       isa<ComplexType>(CanonicalType) ||
       isa<ObjCObjectPointerType>(CanonicalType) ||
       isExtIntType();
7055}

7057inline bool Type::isIntegralOrEnumerationType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
  return BT->getKind() >= BuiltinType::Bool &&
         BT->getKind() <= BuiltinType::Int128;

// Check for a complete enum type; incomplete enum types are not properly an
// enumeration type in the sense required here.
if (const auto *ET = dyn_cast<EnumType>(CanonicalType))
  return IsEnumDeclComplete(ET->getDecl());

return isExtIntType();
7068}

7070inline bool Type::isBooleanType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
  return BT->getKind() == BuiltinType::Bool;
return false;
7074}

7076inline bool Type::isUndeducedType() const {
auto *DT = getContainedDeducedType();
return DT && !DT->isDeduced();
7079}

7081/// Determines whether this is a type for which one can define
7082/// an overloaded operator.
7083inline bool Type::isOverloadableType() const {
return isDependentType() || isRecordType() || isEnumeralType();
7085}

7087/// Determines whether this type is written as a typedef-name.
7088inline bool Type::isTypedefNameType() const {
if (getAs<TypedefType>())
  return true;
if (auto *TST = getAs<TemplateSpecializationType>())
  return TST->isTypeAlias();
return false;
7094}

7096/// Determines whether this type can decay to a pointer type.
7097inline bool Type::canDecayToPointerType() const {
return isFunctionType() || isArrayType();
7099}

7101inline bool Type::hasPointerRepresentation() const {
return (isPointerType() || isReferenceType() || isBlockPointerType() ||
        isObjCObjectPointerType() || isNullPtrType());
7104}

7106inline bool Type::hasObjCPointerRepresentation() const {
return isObjCObjectPointerType();
7108}

7110inline const Type *Type::getBaseElementTypeUnsafe() const {
const Type *type = this;
while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe())
  type = arrayType->getElementType().getTypePtr();
return type;
7115}

7117inline const Type *Type::getPointeeOrArrayElementType() const {
const Type *type = this;
if (type->isAnyPointerType())
  return type->getPointeeType().getTypePtr();
else if (type->isArrayType())
  return type->getBaseElementTypeUnsafe();
return type;
7124}
7125/// Insertion operator for partial diagnostics. This allows sending adress
7126/// spaces into a diagnostic with <<.
7127inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD,
                                           LangAS AS) {
PD.AddTaggedVal(static_cast<std::underlying_type_t<LangAS>>(AS),
                DiagnosticsEngine::ArgumentKind::ak_addrspace);
return PD;
7132}

7134/// Insertion operator for partial diagnostics. This allows sending Qualifiers
7135/// into a diagnostic with <<.
7136inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD,
                                           Qualifiers Q) {
PD.AddTaggedVal(Q.getAsOpaqueValue(),
                DiagnosticsEngine::ArgumentKind::ak_qual);
return PD;
7141}

7143/// Insertion operator for partial diagnostics.  This allows sending QualType's
7144/// into a diagnostic with <<.
7145inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD,
                                           QualType T) {
PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()),
                DiagnosticsEngine::ak_qualtype);
return PD;
7150}

7152// Helper class template that is used by Type::getAs to ensure that one does
7153// not try to look through a qualified type to get to an array type.
7154template <typename T>
7155using TypeIsArrayType =
  std::integral_constant<bool, std::is_same<T, ArrayType>::value ||
                                   std::is_base_of<ArrayType, T>::value>;

7159// Member-template getAs<specific type>'.
7160template <typename T> const T *Type::getAs() const {
static_assert(!TypeIsArrayType<T>::value,
              "ArrayType cannot be used with getAs!");

// If this is directly a T type, return it.
if (const auto *Ty = dyn_cast<T>(this))
  return Ty;

// If the canonical form of this type isn't the right kind, reject it.
if (!isa<T>(CanonicalType))
  return nullptr;

// If this is a typedef for the type, strip the typedef off without
// losing all typedef information.
return cast<T>(getUnqualifiedDesugaredType());
7175}

7177template <typename T> const T *Type::getAsAdjusted() const {
static_assert(!TypeIsArrayType<T>::value, "ArrayType cannot be used with getAsAdjusted!");

// If this is directly a T type, return it.
if (const auto *Ty = dyn_cast<T>(this))
  return Ty;

// If the canonical form of this type isn't the right kind, reject it.
if (!isa<T>(CanonicalType))
  return nullptr;

// Strip off type adjustments that do not modify the underlying nature of the
// type.
const Type *Ty = this;
while (Ty) {
  if (const auto *A = dyn_cast<AttributedType>(Ty))
    Ty = A->getModifiedType().getTypePtr();
  else if (const auto *E = dyn_cast<ElaboratedType>(Ty))
    Ty = E->desugar().getTypePtr();
  else if (const auto *P = dyn_cast<ParenType>(Ty))
    Ty = P->desugar().getTypePtr();
  else if (const auto *A = dyn_cast<AdjustedType>(Ty))
    Ty = A->desugar().getTypePtr();
  else if (const auto *M = dyn_cast<MacroQualifiedType>(Ty))
    Ty = M->desugar().getTypePtr();
  else
    break;
}

// Just because the canonical type is correct does not mean we can use cast<>,
// since we may not have stripped off all the sugar down to the base type.
return dyn_cast<T>(Ty);
7209}

7211inline const ArrayType *Type::getAsArrayTypeUnsafe() const {
// If this is directly an array type, return it.
if (const auto *arr = dyn_cast<ArrayType>(this))
  return arr;

// If the canonical form of this type isn't the right kind, reject it.
if (!isa<ArrayType>(CanonicalType))
  return nullptr;

// If this is a typedef for the type, strip the typedef off without
// losing all typedef information.
return cast<ArrayType>(getUnqualifiedDesugaredType());
7223}

7225template <typename T> const T *Type::castAs() const {
static_assert(!TypeIsArrayType<T>::value,
              "ArrayType cannot be used with castAs!");

if (const auto *ty = dyn_cast<T>(this)) return ty;
assert(isa<T>(CanonicalType))((void)0);
return cast<T>(getUnqualifiedDesugaredType());
7232}

7234inline const ArrayType *Type::castAsArrayTypeUnsafe() const {
assert(isa<ArrayType>(CanonicalType))((void)0);
if (const auto *arr = dyn_cast<ArrayType>(this)) return arr;
return cast<ArrayType>(getUnqualifiedDesugaredType());
7238}

7240DecayedType::DecayedType(QualType OriginalType, QualType DecayedPtr,
                       QualType CanonicalPtr)
  : AdjustedType(Decayed, OriginalType, DecayedPtr, CanonicalPtr) {
7243#ifndef NDEBUG1
QualType Adjusted = getAdjustedType();
(void)AttributedType::stripOuterNullability(Adjusted);
assert(isa<PointerType>(Adjusted))((void)0);
7247#endif
7248}

7250QualType DecayedType::getPointeeType() const {
QualType Decayed = getDecayedType();
(void)AttributedType::stripOuterNullability(Decayed);
return cast<PointerType>(Decayed)->getPointeeType();
7254}

7256// Get the decimal string representation of a fixed point type, represented
7257// as a scaled integer.
7258// TODO: At some point, we should change the arguments to instead just accept an
7259// APFixedPoint instead of APSInt and scale.
7260void FixedPointValueToString(SmallVectorImpl<char> &Str, llvm::APSInt Val,
                           unsigned Scale);

7263} // namespace clang

7265#endif // LLVM_CLANG_AST_TYPE_H

←

/usr/src/gnu/usr.bin/clang/libclangCodeGen/../../../llvm/llvm/include/llvm/ADT/PointerUnion.h

1//===- llvm/ADT/PointerUnion.h - Discriminated Union of 2 Ptrs --*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file defines the PointerUnion class, which is a discriminated union of
10// pointer types.
11//
12//===----------------------------------------------------------------------===//

14#ifndef LLVM_ADT_POINTERUNION_H
15#define LLVM_ADT_POINTERUNION_H

17#include "llvm/ADT/DenseMapInfo.h"
18#include "llvm/ADT/PointerIntPair.h"
19#include "llvm/Support/PointerLikeTypeTraits.h"
20#include <cassert>
21#include <cstddef>
22#include <cstdint>

24namespace llvm {

26template <typename T> struct PointerUnionTypeSelectorReturn {
using Return = T;
28};

30/// Get a type based on whether two types are the same or not.
31///
32/// For:
33///
34/// \code
35///   using Ret = typename PointerUnionTypeSelector<T1, T2, EQ, NE>::Return;
36/// \endcode
37///
38/// Ret will be EQ type if T1 is same as T2 or NE type otherwise.
39template <typename T1, typename T2, typename RET_EQ, typename RET_NE>
40struct PointerUnionTypeSelector {
using Return = typename PointerUnionTypeSelectorReturn<RET_NE>::Return;
42};

44template <typename T, typename RET_EQ, typename RET_NE>
45struct PointerUnionTypeSelector<T, T, RET_EQ, RET_NE> {
using Return = typename PointerUnionTypeSelectorReturn<RET_EQ>::Return;
47};

49template <typename T1, typename T2, typename RET_EQ, typename RET_NE>
50struct PointerUnionTypeSelectorReturn<
  PointerUnionTypeSelector<T1, T2, RET_EQ, RET_NE>> {
using Return =
    typename PointerUnionTypeSelector<T1, T2, RET_EQ, RET_NE>::Return;
54};

56namespace pointer_union_detail {
/// Determine the number of bits required to store integers with values < n.
/// This is ceil(log2(n)).
constexpr int bitsRequired(unsigned n) {
  return n > 1 ? 1 + bitsRequired((n + 1) / 2) : 0;
}

template <typename... Ts> constexpr int lowBitsAvailable() {
  return std::min<int>({PointerLikeTypeTraits<Ts>::NumLowBitsAvailable...});
}

/// Find the index of a type in a list of types. TypeIndex<T, Us...>::Index
/// is the index of T in Us, or sizeof...(Us) if T does not appear in the
/// list.
template <typename T, typename ...Us> struct TypeIndex;
template <typename T, typename ...Us> struct TypeIndex<T, T, Us...> {
  static constexpr int Index = 0;
};
template <typename T, typename U, typename... Us>
struct TypeIndex<T, U, Us...> {
  static constexpr int Index = 1 + TypeIndex<T, Us...>::Index;
};
template <typename T> struct TypeIndex<T> {
  static constexpr int Index = 0;
};

/// Find the first type in a list of types.
template <typename T, typename...> struct GetFirstType {
  using type = T;
};

/// Provide PointerLikeTypeTraits for void* that is used by PointerUnion
/// for the template arguments.
template <typename ...PTs> class PointerUnionUIntTraits {
public:
  static inline void *getAsVoidPointer(void *P) { return P; }
  static inline void *getFromVoidPointer(void *P) { return P; }
  static constexpr int NumLowBitsAvailable = lowBitsAvailable<PTs...>();
};

template <typename Derived, typename ValTy, int I, typename ...Types>
class PointerUnionMembers;

template <typename Derived, typename ValTy, int I>
class PointerUnionMembers<Derived, ValTy, I> {
protected:
  ValTy Val;
  PointerUnionMembers() = default;
  PointerUnionMembers(ValTy Val) : Val(Val) {}

  friend struct PointerLikeTypeTraits<Derived>;
};

template <typename Derived, typename ValTy, int I, typename Type,
          typename ...Types>
class PointerUnionMembers<Derived, ValTy, I, Type, Types...>
    : public PointerUnionMembers<Derived, ValTy, I + 1, Types...> {
  using Base = PointerUnionMembers<Derived, ValTy, I + 1, Types...>;
public:
  using Base::Base;
  PointerUnionMembers() = default;
  PointerUnionMembers(Type V)
      : Base(ValTy(const_cast<void *>(
                       PointerLikeTypeTraits<Type>::getAsVoidPointer(V)),
                   I)) {}

  using Base::operator=;
  Derived &operator=(Type V) {
    this->Val = ValTy(
        const_cast<void *>(PointerLikeTypeTraits<Type>::getAsVoidPointer(V)),
        I);
    return static_cast<Derived &>(*this);
  };
};
130}

132/// A discriminated union of two or more pointer types, with the discriminator
133/// in the low bit of the pointer.
134///
135/// This implementation is extremely efficient in space due to leveraging the
136/// low bits of the pointer, while exposing a natural and type-safe API.
137///
138/// Common use patterns would be something like this:
139///    PointerUnion<int*, float*> P;
140///    P = (int*)0;
141///    printf("%d %d", P.is<int*>(), P.is<float*>());  // prints "1 0"
142///    X = P.get<int*>();     // ok.
143///    Y = P.get<float*>();   // runtime assertion failure.
144///    Z = P.get<double*>();  // compile time failure.
145///    P = (float*)0;
146///    Y = P.get<float*>();   // ok.
147///    X = P.get<int*>();     // runtime assertion failure.
148template <typename... PTs>
149class PointerUnion
  : public pointer_union_detail::PointerUnionMembers<
        PointerUnion<PTs...>,
        PointerIntPair<
            void *, pointer_union_detail::bitsRequired(sizeof...(PTs)), int,
            pointer_union_detail::PointerUnionUIntTraits<PTs...>>,
        0, PTs...> {
// The first type is special because we want to directly cast a pointer to a
// default-initialized union to a pointer to the first type. But we don't
// want PointerUnion to be a 'template <typename First, typename ...Rest>'
// because it's much more convenient to have a name for the whole pack. So
// split off the first type here.
using First = typename pointer_union_detail::GetFirstType<PTs...>::type;
using Base = typename PointerUnion::PointerUnionMembers;

164public:
PointerUnion() = default;

PointerUnion(std::nullptr_t) : PointerUnion() {}
using Base::Base;

/// Test if the pointer held in the union is null, regardless of
/// which type it is.
bool isNull() const { return !this->Val.getPointer(); }
23
←
Assuming the condition is true→
24
←
Returning the value 1, which participates in a condition later→

explicit operator bool() const { return !isNull(); }

/// Test if the Union currently holds the type matching T.
template <typename T> bool is() const {
  constexpr int Index = pointer_union_detail::TypeIndex<T, PTs...>::Index;
  static_assert(Index < sizeof...(PTs),
                "PointerUnion::is<T> given type not in the union");
  return this->Val.getInt() == Index;
}

/// Returns the value of the specified pointer type.
///
/// If the specified pointer type is incorrect, assert.
template <typename T> T get() const {
  assert(is<T>() && "Invalid accessor called")((void)0);
  return PointerLikeTypeTraits<T>::getFromVoidPointer(this->Val.getPointer());
}

/// Returns the current pointer if it is of the specified pointer type,
/// otherwise returns null.
template <typename T> T dyn_cast() const {
  if (is<T>())
    return get<T>();
  return T();
}

/// If the union is set to the first pointer type get an address pointing to
/// it.
First const *getAddrOfPtr1() const {
  return const_cast<PointerUnion *>(this)->getAddrOfPtr1();
}

/// If the union is set to the first pointer type get an address pointing to
/// it.
First *getAddrOfPtr1() {
  assert(is<First>() && "Val is not the first pointer")((void)0);
  assert(((void)0)
      PointerLikeTypeTraits<First>::getAsVoidPointer(get<First>()) ==((void)0)
          this->Val.getPointer() &&((void)0)
      "Can't get the address because PointerLikeTypeTraits changes the ptr")((void)0);
  return const_cast<First *>(
      reinterpret_cast<const First *>(this->Val.getAddrOfPointer()));
}

/// Assignment from nullptr which just clears the union.
const PointerUnion &operator=(std::nullptr_t) {
  this->Val.initWithPointer(nullptr);
  return *this;
}

/// Assignment from elements of the union.
using Base::operator=;

void *getOpaqueValue() const { return this->Val.getOpaqueValue(); }
static inline PointerUnion getFromOpaqueValue(void *VP) {
  PointerUnion V;
  V.Val = decltype(V.Val)::getFromOpaqueValue(VP);
  return V;
}
233};

235template <typename ...PTs>
236bool operator==(PointerUnion<PTs...> lhs, PointerUnion<PTs...> rhs) {
return lhs.getOpaqueValue() == rhs.getOpaqueValue();
238}

240template <typename ...PTs>
241bool operator!=(PointerUnion<PTs...> lhs, PointerUnion<PTs...> rhs) {
return lhs.getOpaqueValue() != rhs.getOpaqueValue();
243}

245template <typename ...PTs>
246bool operator<(PointerUnion<PTs...> lhs, PointerUnion<PTs...> rhs) {
return lhs.getOpaqueValue() < rhs.getOpaqueValue();
248}

250// Teach SmallPtrSet that PointerUnion is "basically a pointer", that has
251// # low bits available = min(PT1bits,PT2bits)-1.
252template <typename ...PTs>
253struct PointerLikeTypeTraits<PointerUnion<PTs...>> {
static inline void *getAsVoidPointer(const PointerUnion<PTs...> &P) {
  return P.getOpaqueValue();
}

static inline PointerUnion<PTs...> getFromVoidPointer(void *P) {
  return PointerUnion<PTs...>::getFromOpaqueValue(P);
}

// The number of bits available are the min of the pointer types minus the
// bits needed for the discriminator.
static constexpr int NumLowBitsAvailable = PointerLikeTypeTraits<decltype(
    PointerUnion<PTs...>::Val)>::NumLowBitsAvailable;
266};

268// Teach DenseMap how to use PointerUnions as keys.
269template <typename ...PTs> struct DenseMapInfo<PointerUnion<PTs...>> {
using Union = PointerUnion<PTs...>;
using FirstInfo =
    DenseMapInfo<typename pointer_union_detail::GetFirstType<PTs...>::type>;

static inline Union getEmptyKey() { return Union(FirstInfo::getEmptyKey()); }

static inline Union getTombstoneKey() {
  return Union(FirstInfo::getTombstoneKey());
}

static unsigned getHashValue(const Union &UnionVal) {
  intptr_t key = (intptr_t)UnionVal.getOpaqueValue();
  return DenseMapInfo<intptr_t>::getHashValue(key);
}

static bool isEqual(const Union &LHS, const Union &RHS) {
  return LHS == RHS;
}
288};

290} // end namespace llvm

292#endif // LLVM_ADT_POINTERUNION_H