clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name Operator.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 pic -pic-level 1 -fhalf-no-semantic-interposition -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/libLLVM/obj -resource-dir /usr/local/lib/clang/13.0.0 -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Analysis -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/ASMParser -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/BinaryFormat -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Bitcode -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Bitcode -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Bitstream -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /include/llvm/CodeGen -I /include/llvm/CodeGen/PBQP -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/IR -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/IR -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms/Coroutines -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/ProfileData/Coverage -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/DebugInfo/CodeView -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/DebugInfo/DWARF -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/DebugInfo -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/DebugInfo/MSF -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/DebugInfo/PDB -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Demangle -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/ExecutionEngine -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/ExecutionEngine/JITLink -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/ExecutionEngine/Orc -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Frontend -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Frontend/OpenACC -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Frontend -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Frontend/OpenMP -I /include/llvm/CodeGen/GlobalISel -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/IRReader -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms/InstCombine -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/Transforms/InstCombine -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/LTO -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Linker -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/MC -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/MC/MCParser -I /include/llvm/CodeGen/MIRParser -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Object -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Option -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Passes -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/ -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/ProfileData -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms/Scalar -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/ADT -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Support -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/DebugInfo/Symbolize -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Target -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms/Utils -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms/Vectorize -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms/IPO -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include -I /usr/src/gnu/usr.bin/clang/libLLVM/../include -I /usr/src/gnu/usr.bin/clang/libLLVM/obj -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include -D NDEBUG -D __STDC_LIMIT_MACROS -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D LLVM_PREFIX="/usr" -D PIC -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/libLLVM/obj -ferror-limit 19 -fvisibility-inlines-hidden -fwrapv -D_RET_PROTECTOR -ret-protector -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/libLLVM/../../../llvm/llvm/lib/IR/Operator.cpp
1 | |
2 | |
3 | |
4 | |
5 | |
6 | |
7 | |
8 | |
9 | |
10 | |
11 | |
12 | |
13 | #include "llvm/IR/Operator.h" |
14 | #include "llvm/IR/DataLayout.h" |
15 | #include "llvm/IR/GetElementPtrTypeIterator.h" |
16 | #include "llvm/IR/Instructions.h" |
17 | #include "llvm/IR/Type.h" |
18 | |
19 | #include "ConstantsContext.h" |
20 | |
21 | namespace llvm { |
22 | Type *GEPOperator::getSourceElementType() const { |
23 | if (auto *I = dyn_cast<GetElementPtrInst>(this)) |
24 | return I->getSourceElementType(); |
25 | return cast<GetElementPtrConstantExpr>(this)->getSourceElementType(); |
26 | } |
27 | |
28 | Type *GEPOperator::getResultElementType() const { |
29 | if (auto *I = dyn_cast<GetElementPtrInst>(this)) |
30 | return I->getResultElementType(); |
31 | return cast<GetElementPtrConstantExpr>(this)->getResultElementType(); |
32 | } |
33 | |
34 | Align GEPOperator::getMaxPreservedAlignment(const DataLayout &DL) const { |
35 | |
36 | |
37 | |
38 | Align Result = Align(llvm::Value::MaximumAlignment); |
39 | for (gep_type_iterator GTI = gep_type_begin(this), GTE = gep_type_end(this); |
| 1 | Loop condition is true. Entering loop body | |
|
| 6 | | Loop condition is true. Entering loop body | |
|
40 | GTI != GTE; ++GTI) { |
41 | int64_t Offset = 1; |
42 | ConstantInt *OpC = dyn_cast<ConstantInt>(GTI.getOperand()); |
| 2 | | Assuming the object is a 'ConstantInt' | |
|
| 7 | | Assuming the object is a 'ConstantInt' | |
|
43 | |
44 | if (StructType *STy = GTI.getStructTypeOrNull()) { |
| 3 | | Assuming 'STy' is non-null | |
|
| |
| 8 | | Assuming 'STy' is non-null | |
|
| |
45 | const StructLayout *SL = DL.getStructLayout(STy); |
46 | Offset = SL->getElementOffset(OpC->getZExtValue()); |
47 | } else { |
48 | assert(GTI.isSequential() && "should be sequencial"); |
49 | |
50 | |
51 | int64_t ElemCount = 1; |
52 | if (OpC) |
53 | ElemCount = OpC->getZExtValue(); |
54 | Offset = DL.getTypeAllocSize(GTI.getIndexedType()) * ElemCount; |
55 | } |
56 | Result = Align(MinAlign(Offset, Result.value())); |
| 5 | | The value 255 is assigned to 'Result.ShiftValue' | |
|
| |
57 | } |
58 | return Result; |
59 | } |
60 | |
61 | bool GEPOperator::accumulateConstantOffset( |
62 | const DataLayout &DL, APInt &Offset, |
63 | function_ref<bool(Value &, APInt &)> ExternalAnalysis) const { |
64 | assert(Offset.getBitWidth() == |
65 | DL.getIndexSizeInBits(getPointerAddressSpace()) && |
66 | "The offset bit width does not match DL specification."); |
67 | SmallVector<const Value *> Index(value_op_begin() + 1, value_op_end()); |
68 | return GEPOperator::accumulateConstantOffset(getSourceElementType(), Index, |
69 | DL, Offset, ExternalAnalysis); |
70 | } |
71 | |
72 | bool GEPOperator::accumulateConstantOffset( |
73 | Type *SourceType, ArrayRef<const Value *> Index, const DataLayout &DL, |
74 | APInt &Offset, function_ref<bool(Value &, APInt &)> ExternalAnalysis) { |
75 | bool UsedExternalAnalysis = false; |
76 | auto AccumulateOffset = [&](APInt Index, uint64_t Size) -> bool { |
77 | Index = Index.sextOrTrunc(Offset.getBitWidth()); |
78 | APInt IndexedSize = APInt(Offset.getBitWidth(), Size); |
79 | |
80 | if (!UsedExternalAnalysis) { |
81 | Offset += Index * IndexedSize; |
82 | } else { |
83 | |
84 | |
85 | bool Overflow = false; |
86 | APInt OffsetPlus = Index.smul_ov(IndexedSize, Overflow); |
87 | if (Overflow) |
88 | return false; |
89 | Offset = Offset.sadd_ov(OffsetPlus, Overflow); |
90 | if (Overflow) |
91 | return false; |
92 | } |
93 | return true; |
94 | }; |
95 | auto begin = generic_gep_type_iterator<decltype(Index.begin())>::begin( |
96 | SourceType, Index.begin()); |
97 | auto end = generic_gep_type_iterator<decltype(Index.end())>::end(Index.end()); |
98 | for (auto GTI = begin, GTE = end; GTI != GTE; ++GTI) { |
99 | |
100 | bool ScalableType = false; |
101 | if (isa<ScalableVectorType>(GTI.getIndexedType())) |
102 | ScalableType = true; |
103 | |
104 | Value *V = GTI.getOperand(); |
105 | StructType *STy = GTI.getStructTypeOrNull(); |
106 | |
107 | if (auto ConstOffset = dyn_cast<ConstantInt>(V)) { |
108 | if (ConstOffset->isZero()) |
109 | continue; |
110 | |
111 | |
112 | if (ScalableType) |
113 | return false; |
114 | |
115 | if (STy) { |
116 | unsigned ElementIdx = ConstOffset->getZExtValue(); |
117 | const StructLayout *SL = DL.getStructLayout(STy); |
118 | |
119 | if (!AccumulateOffset( |
120 | APInt(Offset.getBitWidth(), SL->getElementOffset(ElementIdx)), |
121 | 1)) |
122 | return false; |
123 | continue; |
124 | } |
125 | if (!AccumulateOffset(ConstOffset->getValue(), |
126 | DL.getTypeAllocSize(GTI.getIndexedType()))) |
127 | return false; |
128 | continue; |
129 | } |
130 | |
131 | |
132 | |
133 | if (!ExternalAnalysis || STy || ScalableType) |
134 | return false; |
135 | APInt AnalysisIndex; |
136 | if (!ExternalAnalysis(*V, AnalysisIndex)) |
137 | return false; |
138 | UsedExternalAnalysis = true; |
139 | if (!AccumulateOffset(AnalysisIndex, |
140 | DL.getTypeAllocSize(GTI.getIndexedType()))) |
141 | return false; |
142 | } |
143 | return true; |
144 | } |
145 | |
146 | bool GEPOperator::collectOffset( |
147 | const DataLayout &DL, unsigned BitWidth, |
148 | MapVector<Value *, APInt> &VariableOffsets, |
149 | APInt &ConstantOffset) const { |
150 | assert(BitWidth == DL.getIndexSizeInBits(getPointerAddressSpace()) && |
151 | "The offset bit width does not match DL specification."); |
152 | |
153 | auto CollectConstantOffset = [&](APInt Index, uint64_t Size) { |
154 | Index = Index.sextOrTrunc(BitWidth); |
155 | APInt IndexedSize = APInt(BitWidth, Size); |
156 | ConstantOffset += Index * IndexedSize; |
157 | }; |
158 | |
159 | for (gep_type_iterator GTI = gep_type_begin(this), GTE = gep_type_end(this); |
160 | GTI != GTE; ++GTI) { |
161 | |
162 | bool ScalableType = isa<ScalableVectorType>(GTI.getIndexedType()); |
163 | |
164 | Value *V = GTI.getOperand(); |
165 | StructType *STy = GTI.getStructTypeOrNull(); |
166 | |
167 | if (auto ConstOffset = dyn_cast<ConstantInt>(V)) { |
168 | if (ConstOffset->isZero()) |
169 | continue; |
170 | |
171 | |
172 | |
173 | |
174 | |
175 | if (ScalableType) |
176 | return false; |
177 | |
178 | if (STy) { |
179 | unsigned ElementIdx = ConstOffset->getZExtValue(); |
180 | const StructLayout *SL = DL.getStructLayout(STy); |
181 | |
182 | CollectConstantOffset(APInt(BitWidth, SL->getElementOffset(ElementIdx)), |
183 | 1); |
184 | continue; |
185 | } |
186 | CollectConstantOffset(ConstOffset->getValue(), |
187 | DL.getTypeAllocSize(GTI.getIndexedType())); |
188 | continue; |
189 | } |
190 | |
191 | if (STy || ScalableType) |
192 | return false; |
193 | |
194 | |
195 | VariableOffsets.insert({V, APInt(BitWidth, 0)}); |
196 | APInt IndexedSize = |
197 | APInt(BitWidth, DL.getTypeAllocSize(GTI.getIndexedType())); |
198 | VariableOffsets[V] += IndexedSize; |
199 | } |
200 | return true; |
201 | } |
202 | } |
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18 | |
19 | |
20 | |
21 | #ifndef LLVM_SUPPORT_ALIGNMENT_H_ |
22 | #define LLVM_SUPPORT_ALIGNMENT_H_ |
23 | |
24 | #include "llvm/ADT/Optional.h" |
25 | #include "llvm/Support/MathExtras.h" |
26 | #include <cassert> |
27 | #ifndef NDEBUG |
28 | #include <string> |
29 | #endif // NDEBUG |
30 | |
31 | namespace llvm { |
32 | |
33 | #define ALIGN_CHECK_ISPOSITIVE(decl) \ |
34 | assert(decl > 0 && (#decl " should be defined")) |
35 | |
36 | |
37 | |
38 | |
39 | struct Align { |
40 | private: |
41 | uint8_t ShiftValue = 0; |
42 | |
43 | |
44 | friend struct MaybeAlign; |
45 | friend unsigned Log2(Align); |
46 | friend bool operator==(Align Lhs, Align Rhs); |
47 | friend bool operator!=(Align Lhs, Align Rhs); |
48 | friend bool operator<=(Align Lhs, Align Rhs); |
49 | friend bool operator>=(Align Lhs, Align Rhs); |
50 | friend bool operator<(Align Lhs, Align Rhs); |
51 | friend bool operator>(Align Lhs, Align Rhs); |
52 | friend unsigned encode(struct MaybeAlign A); |
53 | friend struct MaybeAlign decodeMaybeAlign(unsigned Value); |
54 | |
55 | |
56 | |
57 | |
58 | |
59 | |
60 | |
61 | |
62 | struct LogValue { |
63 | uint8_t Log; |
64 | }; |
65 | |
66 | public: |
67 | |
68 | constexpr Align() = default; |
69 | |
70 | |
71 | constexpr Align(const Align &Other) = default; |
72 | constexpr Align(Align &&Other) = default; |
73 | Align &operator=(const Align &Other) = default; |
74 | Align &operator=(Align &&Other) = default; |
75 | |
76 | explicit Align(uint64_t Value) { |
77 | assert(Value > 0 && "Value must not be 0"); |
78 | assert(llvm::isPowerOf2_64(Value) && "Alignment is not a power of 2"); |
79 | ShiftValue = Log2_64(Value); |
80 | assert(ShiftValue < 64 && "Broken invariant"); |
81 | } |
82 | |
83 | |
84 | |
85 | uint64_t value() const { return uint64_t(1) << ShiftValue; } |
| 11 | | The result of the left shift is undefined due to shifting by '255', which is greater or equal to the width of type 'uint64_t' |
|
86 | |
87 | |
88 | template <size_t kValue> constexpr static LogValue Constant() { |
89 | return LogValue{static_cast<uint8_t>(CTLog2<kValue>())}; |
90 | } |
91 | |
92 | |
93 | |
94 | template <typename T> constexpr static LogValue Of() { |
95 | return Constant<std::alignment_of<T>::value>(); |
96 | } |
97 | |
98 | |
99 | constexpr Align(LogValue CA) : ShiftValue(CA.Log) {} |
100 | }; |
101 | |
102 | |
103 | inline Align assumeAligned(uint64_t Value) { |
104 | return Value ? Align(Value) : Align(); |
105 | } |
106 | |
107 | |
108 | |
109 | struct MaybeAlign : public llvm::Optional<Align> { |
110 | private: |
111 | using UP = llvm::Optional<Align>; |
112 | |
113 | public: |
114 | |
115 | MaybeAlign() = default; |
116 | |
117 | |
118 | MaybeAlign(const MaybeAlign &Other) = default; |
119 | MaybeAlign &operator=(const MaybeAlign &Other) = default; |
120 | MaybeAlign(MaybeAlign &&Other) = default; |
121 | MaybeAlign &operator=(MaybeAlign &&Other) = default; |
122 | |
123 | |
124 | using UP::UP; |
125 | |
126 | explicit MaybeAlign(uint64_t Value) { |
127 | assert((Value == 0 || llvm::isPowerOf2_64(Value)) && |
128 | "Alignment is neither 0 nor a power of 2"); |
129 | if (Value) |
130 | emplace(Value); |
131 | } |
132 | |
133 | |
134 | Align valueOrOne() const { return hasValue() ? getValue() : Align(); } |
135 | }; |
136 | |
137 | |
138 | inline bool isAligned(Align Lhs, uint64_t SizeInBytes) { |
139 | return SizeInBytes % Lhs.value() == 0; |
140 | } |
141 | |
142 | |
143 | inline bool isAddrAligned(Align Lhs, const void *Addr) { |
144 | return isAligned(Lhs, reinterpret_cast<uintptr_t>(Addr)); |
145 | } |
146 | |
147 | |
148 | inline uint64_t alignTo(uint64_t Size, Align A) { |
149 | const uint64_t Value = A.value(); |
150 | |
151 | |
152 | |
153 | |
154 | |
155 | |
156 | |
157 | |
158 | |
159 | return (Size + Value - 1) & ~(Value - 1U); |
160 | } |
161 | |
162 | |
163 | |
164 | |
165 | |
166 | |
167 | |
168 | |
169 | |
170 | |
171 | |
172 | |
173 | inline uint64_t alignTo(uint64_t Size, Align A, uint64_t Skew) { |
174 | const uint64_t Value = A.value(); |
175 | Skew %= Value; |
176 | return ((Size + Value - 1 - Skew) & ~(Value - 1U)) + Skew; |
177 | } |
178 | |
179 | |
180 | |
181 | inline uint64_t alignTo(uint64_t Size, MaybeAlign A) { |
182 | return A ? alignTo(Size, A.getValue()) : Size; |
183 | } |
184 | |
185 | |
186 | inline uintptr_t alignAddr(const void *Addr, Align Alignment) { |
187 | uintptr_t ArithAddr = reinterpret_cast<uintptr_t>(Addr); |
188 | assert(static_cast<uintptr_t>(ArithAddr + Alignment.value() - 1) >= |
189 | ArithAddr && |
190 | "Overflow"); |
191 | return alignTo(ArithAddr, Alignment); |
192 | } |
193 | |
194 | |
195 | |
196 | inline uint64_t offsetToAlignment(uint64_t Value, Align Alignment) { |
197 | return alignTo(Value, Alignment) - Value; |
198 | } |
199 | |
200 | |
201 | |
202 | inline uint64_t offsetToAlignedAddr(const void *Addr, Align Alignment) { |
203 | return offsetToAlignment(reinterpret_cast<uintptr_t>(Addr), Alignment); |
204 | } |
205 | |
206 | |
207 | inline unsigned Log2(Align A) { return A.ShiftValue; } |
208 | |
209 | |
210 | |
211 | inline Align commonAlignment(Align A, Align B) { return std::min(A, B); } |
212 | |
213 | |
214 | |
215 | inline Align commonAlignment(Align A, uint64_t Offset) { |
216 | return Align(MinAlign(A.value(), Offset)); |
217 | } |
218 | |
219 | |
220 | |
221 | inline MaybeAlign commonAlignment(MaybeAlign A, MaybeAlign B) { |
222 | return A && B ? commonAlignment(*A, *B) : A ? A : B; |
223 | } |
224 | |
225 | |
226 | |
227 | inline MaybeAlign commonAlignment(MaybeAlign A, uint64_t Offset) { |
228 | return MaybeAlign(MinAlign((*A).value(), Offset)); |
229 | } |
230 | |
231 | |
232 | inline unsigned encode(MaybeAlign A) { return A ? A->ShiftValue + 1 : 0; } |
233 | |
234 | |
235 | inline MaybeAlign decodeMaybeAlign(unsigned Value) { |
236 | if (Value == 0) |
237 | return MaybeAlign(); |
238 | Align Out; |
239 | Out.ShiftValue = Value - 1; |
240 | return Out; |
241 | } |
242 | |
243 | |
244 | |
245 | inline unsigned encode(Align A) { return encode(MaybeAlign(A)); } |
246 | |
247 | |
248 | inline bool operator==(Align Lhs, uint64_t Rhs) { |
249 | ALIGN_CHECK_ISPOSITIVE(Rhs); |
250 | return Lhs.value() == Rhs; |
251 | } |
252 | inline bool operator!=(Align Lhs, uint64_t Rhs) { |
253 | ALIGN_CHECK_ISPOSITIVE(Rhs); |
254 | return Lhs.value() != Rhs; |
255 | } |
256 | inline bool operator<=(Align Lhs, uint64_t Rhs) { |
257 | ALIGN_CHECK_ISPOSITIVE(Rhs); |
258 | return Lhs.value() <= Rhs; |
259 | } |
260 | inline bool operator>=(Align Lhs, uint64_t Rhs) { |
261 | ALIGN_CHECK_ISPOSITIVE(Rhs); |
262 | return Lhs.value() >= Rhs; |
263 | } |
264 | inline bool operator<(Align Lhs, uint64_t Rhs) { |
265 | ALIGN_CHECK_ISPOSITIVE(Rhs); |
266 | return Lhs.value() < Rhs; |
267 | } |
268 | inline bool operator>(Align Lhs, uint64_t Rhs) { |
269 | ALIGN_CHECK_ISPOSITIVE(Rhs); |
270 | return Lhs.value() > Rhs; |
271 | } |
272 | |
273 | |
274 | inline bool operator==(MaybeAlign Lhs, uint64_t Rhs) { |
275 | return Lhs ? (*Lhs).value() == Rhs : Rhs == 0; |
276 | } |
277 | inline bool operator!=(MaybeAlign Lhs, uint64_t Rhs) { |
278 | return Lhs ? (*Lhs).value() != Rhs : Rhs != 0; |
279 | } |
280 | |
281 | |
282 | inline bool operator==(Align Lhs, Align Rhs) { |
283 | return Lhs.ShiftValue == Rhs.ShiftValue; |
284 | } |
285 | inline bool operator!=(Align Lhs, Align Rhs) { |
286 | return Lhs.ShiftValue != Rhs.ShiftValue; |
287 | } |
288 | inline bool operator<=(Align Lhs, Align Rhs) { |
289 | return Lhs.ShiftValue <= Rhs.ShiftValue; |
290 | } |
291 | inline bool operator>=(Align Lhs, Align Rhs) { |
292 | return Lhs.ShiftValue >= Rhs.ShiftValue; |
293 | } |
294 | inline bool operator<(Align Lhs, Align Rhs) { |
295 | return Lhs.ShiftValue < Rhs.ShiftValue; |
296 | } |
297 | inline bool operator>(Align Lhs, Align Rhs) { |
298 | return Lhs.ShiftValue > Rhs.ShiftValue; |
299 | } |
300 | |
301 | |
302 | bool operator<=(Align Lhs, MaybeAlign Rhs) = delete; |
303 | bool operator>=(Align Lhs, MaybeAlign Rhs) = delete; |
304 | bool operator<(Align Lhs, MaybeAlign Rhs) = delete; |
305 | bool operator>(Align Lhs, MaybeAlign Rhs) = delete; |
306 | |
307 | bool operator<=(MaybeAlign Lhs, Align Rhs) = delete; |
308 | bool operator>=(MaybeAlign Lhs, Align Rhs) = delete; |
309 | bool operator<(MaybeAlign Lhs, Align Rhs) = delete; |
310 | bool operator>(MaybeAlign Lhs, Align Rhs) = delete; |
311 | |
312 | bool operator<=(MaybeAlign Lhs, MaybeAlign Rhs) = delete; |
313 | bool operator>=(MaybeAlign Lhs, MaybeAlign Rhs) = delete; |
314 | bool operator<(MaybeAlign Lhs, MaybeAlign Rhs) = delete; |
315 | bool operator>(MaybeAlign Lhs, MaybeAlign Rhs) = delete; |
316 | |
317 | inline Align operator*(Align Lhs, uint64_t Rhs) { |
318 | assert(Rhs > 0 && "Rhs must be positive"); |
319 | return Align(Lhs.value() * Rhs); |
320 | } |
321 | |
322 | inline MaybeAlign operator*(MaybeAlign Lhs, uint64_t Rhs) { |
323 | assert(Rhs > 0 && "Rhs must be positive"); |
324 | return Lhs ? Lhs.getValue() * Rhs : MaybeAlign(); |
325 | } |
326 | |
327 | inline Align operator/(Align Lhs, uint64_t Divisor) { |
328 | assert(llvm::isPowerOf2_64(Divisor) && |
329 | "Divisor must be positive and a power of 2"); |
330 | assert(Lhs != 1 && "Can't halve byte alignment"); |
331 | return Align(Lhs.value() / Divisor); |
332 | } |
333 | |
334 | inline MaybeAlign operator/(MaybeAlign Lhs, uint64_t Divisor) { |
335 | assert(llvm::isPowerOf2_64(Divisor) && |
336 | "Divisor must be positive and a power of 2"); |
337 | return Lhs ? Lhs.getValue() / Divisor : MaybeAlign(); |
338 | } |
339 | |
340 | inline Align max(MaybeAlign Lhs, Align Rhs) { |
341 | return Lhs && *Lhs > Rhs ? *Lhs : Rhs; |
342 | } |
343 | |
344 | inline Align max(Align Lhs, MaybeAlign Rhs) { |
345 | return Rhs && *Rhs > Lhs ? *Rhs : Lhs; |
346 | } |
347 | |
348 | #ifndef NDEBUG |
349 | |
350 | inline std::string DebugStr(const Align &A) { |
351 | return std::to_string(A.value()); |
352 | } |
353 | |
354 | inline std::string DebugStr(const MaybeAlign &MA) { |
355 | if (MA) |
356 | return std::to_string(MA->value()); |
357 | return "None"; |
358 | } |
359 | #endif // NDEBUG |
360 | |
361 | #undef ALIGN_CHECK_ISPOSITIVE |
362 | |
363 | } |
364 | |
365 | #endif // LLVM_SUPPORT_ALIGNMENT_H_ |