/Users/buildslave/jenkins/sharedspace/clang-stage2-coverage-R@2/llvm/lib/IR/MDBuilder.cpp
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1 | | //===---- llvm/MDBuilder.cpp - Builder for LLVM metadata ------------------===// |
2 | | // |
3 | | // The LLVM Compiler Infrastructure |
4 | | // |
5 | | // This file is distributed under the University of Illinois Open Source |
6 | | // License. See LICENSE.TXT for details. |
7 | | // |
8 | | //===----------------------------------------------------------------------===// |
9 | | // |
10 | | // This file defines the MDBuilder class, which is used as a convenient way to |
11 | | // create LLVM metadata with a consistent and simplified interface. |
12 | | // |
13 | | //===----------------------------------------------------------------------===// |
14 | | |
15 | | #include "llvm/IR/MDBuilder.h" |
16 | | #include "llvm/IR/Constants.h" |
17 | | #include "llvm/IR/Metadata.h" |
18 | | using namespace llvm; |
19 | | |
20 | 125k | MDString *MDBuilder::createString(StringRef Str) { |
21 | 125k | return MDString::get(Context, Str); |
22 | 125k | } |
23 | | |
24 | 455k | ConstantAsMetadata *MDBuilder::createConstant(Constant *C) { |
25 | 455k | return ConstantAsMetadata::get(C); |
26 | 455k | } |
27 | | |
28 | 17 | MDNode *MDBuilder::createFPMath(float Accuracy) { |
29 | 17 | if (Accuracy == 0.0) |
30 | 1 | return nullptr; |
31 | 17 | assert(Accuracy > 0.0 && "Invalid fpmath accuracy!"); |
32 | 16 | auto *Op = |
33 | 16 | createConstant(ConstantFP::get(Type::getFloatTy(Context), Accuracy)); |
34 | 16 | return MDNode::get(Context, Op); |
35 | 16 | } |
36 | | |
37 | | MDNode *MDBuilder::createBranchWeights(uint32_t TrueWeight, |
38 | 7.44k | uint32_t FalseWeight) { |
39 | 7.44k | return createBranchWeights({TrueWeight, FalseWeight}); |
40 | 7.44k | } |
41 | | |
42 | 9.29k | MDNode *MDBuilder::createBranchWeights(ArrayRef<uint32_t> Weights) { |
43 | 9.29k | assert(Weights.size() >= 1 && "Need at least one branch weights!"); |
44 | 9.29k | |
45 | 9.29k | SmallVector<Metadata *, 4> Vals(Weights.size() + 1); |
46 | 9.29k | Vals[0] = createString("branch_weights"); |
47 | 9.29k | |
48 | 9.29k | Type *Int32Ty = Type::getInt32Ty(Context); |
49 | 29.4k | for (unsigned i = 0, e = Weights.size(); i != e29.4k ; ++i20.1k ) |
50 | 20.1k | Vals[i + 1] = createConstant(ConstantInt::get(Int32Ty, Weights[i])); |
51 | 9.29k | |
52 | 9.29k | return MDNode::get(Context, Vals); |
53 | 9.29k | } |
54 | | |
55 | 2 | MDNode *MDBuilder::createUnpredictable() { |
56 | 2 | return MDNode::get(Context, None); |
57 | 2 | } |
58 | | |
59 | | MDNode *MDBuilder::createFunctionEntryCount( |
60 | 349 | uint64_t Count, const DenseSet<GlobalValue::GUID> *Imports) { |
61 | 349 | Type *Int64Ty = Type::getInt64Ty(Context); |
62 | 349 | SmallVector<Metadata *, 8> Ops; |
63 | 349 | Ops.push_back(createString("function_entry_count")); |
64 | 349 | Ops.push_back(createConstant(ConstantInt::get(Int64Ty, Count))); |
65 | 349 | if (Imports349 ) { |
66 | 70 | SmallVector<GlobalValue::GUID, 2> OrderID(Imports->begin(), Imports->end()); |
67 | 70 | std::stable_sort(OrderID.begin(), OrderID.end(), |
68 | 3 | [] (GlobalValue::GUID A, GlobalValue::GUID B) { |
69 | 3 | return A < B;}); |
70 | 70 | for (auto ID : OrderID) |
71 | 8 | Ops.push_back(createConstant(ConstantInt::get(Int64Ty, ID))); |
72 | 70 | } |
73 | 349 | return MDNode::get(Context, Ops); |
74 | 349 | } |
75 | | |
76 | 14 | MDNode *MDBuilder::createFunctionSectionPrefix(StringRef Prefix) { |
77 | 14 | return MDNode::get(Context, |
78 | 14 | {createString("function_section_prefix"), |
79 | 14 | createString(Prefix)}); |
80 | 14 | } |
81 | | |
82 | 9.16k | MDNode *MDBuilder::createRange(const APInt &Lo, const APInt &Hi) { |
83 | 9.16k | assert(Lo.getBitWidth() == Hi.getBitWidth() && "Mismatched bitwidths!"); |
84 | 9.16k | |
85 | 9.16k | Type *Ty = IntegerType::get(Context, Lo.getBitWidth()); |
86 | 9.16k | return createRange(ConstantInt::get(Ty, Lo), ConstantInt::get(Ty, Hi)); |
87 | 9.16k | } |
88 | | |
89 | 9.16k | MDNode *MDBuilder::createRange(Constant *Lo, Constant *Hi) { |
90 | 9.16k | // If the range is everything then it is useless. |
91 | 9.16k | if (Hi == Lo) |
92 | 4 | return nullptr; |
93 | 9.16k | |
94 | 9.16k | // Return the range [Lo, Hi). |
95 | 9.16k | return MDNode::get(Context, {createConstant(Lo), createConstant(Hi)}); |
96 | 9.16k | } |
97 | | |
98 | 10.2k | MDNode *MDBuilder::createAnonymousAARoot(StringRef Name, MDNode *Extra) { |
99 | 10.2k | // To ensure uniqueness the root node is self-referential. |
100 | 10.2k | auto Dummy = MDNode::getTemporary(Context, None); |
101 | 10.2k | |
102 | 10.2k | SmallVector<Metadata *, 3> Args(1, Dummy.get()); |
103 | 10.2k | if (Extra) |
104 | 6.97k | Args.push_back(Extra); |
105 | 10.2k | if (!Name.empty()) |
106 | 4.34k | Args.push_back(createString(Name)); |
107 | 10.2k | MDNode *Root = MDNode::get(Context, Args); |
108 | 10.2k | |
109 | 10.2k | // At this point we have |
110 | 10.2k | // !0 = metadata !{} <- dummy |
111 | 10.2k | // !1 = metadata !{metadata !0} <- root |
112 | 10.2k | // Replace the dummy operand with the root node itself and delete the dummy. |
113 | 10.2k | Root->replaceOperandWith(0, Root); |
114 | 10.2k | |
115 | 10.2k | // We now have |
116 | 10.2k | // !1 = metadata !{metadata !1} <- self-referential root |
117 | 10.2k | return Root; |
118 | 10.2k | } |
119 | | |
120 | 7.96k | MDNode *MDBuilder::createTBAARoot(StringRef Name) { |
121 | 7.96k | return MDNode::get(Context, createString(Name)); |
122 | 7.96k | } |
123 | | |
124 | | /// \brief Return metadata for a non-root TBAA node with the given name, |
125 | | /// parent in the TBAA tree, and value for 'pointsToConstantMemory'. |
126 | | MDNode *MDBuilder::createTBAANode(StringRef Name, MDNode *Parent, |
127 | 8 | bool isConstant) { |
128 | 8 | if (isConstant8 ) { |
129 | 1 | Constant *Flags = ConstantInt::get(Type::getInt64Ty(Context), 1); |
130 | 1 | return MDNode::get(Context, |
131 | 1 | {createString(Name), Parent, createConstant(Flags)}); |
132 | 1 | } |
133 | 7 | return MDNode::get(Context, {createString(Name), Parent}); |
134 | 7 | } |
135 | | |
136 | 0 | MDNode *MDBuilder::createAliasScopeDomain(StringRef Name) { |
137 | 0 | return MDNode::get(Context, createString(Name)); |
138 | 0 | } |
139 | | |
140 | 0 | MDNode *MDBuilder::createAliasScope(StringRef Name, MDNode *Domain) { |
141 | 0 | return MDNode::get(Context, {createString(Name), Domain}); |
142 | 0 | } |
143 | | |
144 | | /// \brief Return metadata for a tbaa.struct node with the given |
145 | | /// struct field descriptions. |
146 | 4.20k | MDNode *MDBuilder::createTBAAStructNode(ArrayRef<TBAAStructField> Fields) { |
147 | 4.20k | SmallVector<Metadata *, 4> Vals(Fields.size() * 3); |
148 | 4.20k | Type *Int64 = Type::getInt64Ty(Context); |
149 | 23.2k | for (unsigned i = 0, e = Fields.size(); i != e23.2k ; ++i19.0k ) { |
150 | 19.0k | Vals[i * 3 + 0] = createConstant(ConstantInt::get(Int64, Fields[i].Offset)); |
151 | 19.0k | Vals[i * 3 + 1] = createConstant(ConstantInt::get(Int64, Fields[i].Size)); |
152 | 19.0k | Vals[i * 3 + 2] = Fields[i].TBAA; |
153 | 19.0k | } |
154 | 4.20k | return MDNode::get(Context, Vals); |
155 | 4.20k | } |
156 | | |
157 | | /// \brief Return metadata for a TBAA struct node in the type DAG |
158 | | /// with the given name, a list of pairs (offset, field type in the type DAG). |
159 | | MDNode *MDBuilder::createTBAAStructTypeNode( |
160 | 16.6k | StringRef Name, ArrayRef<std::pair<MDNode *, uint64_t>> Fields) { |
161 | 16.6k | SmallVector<Metadata *, 4> Ops(Fields.size() * 2 + 1); |
162 | 16.6k | Type *Int64 = Type::getInt64Ty(Context); |
163 | 16.6k | Ops[0] = createString(Name); |
164 | 186k | for (unsigned i = 0, e = Fields.size(); i != e186k ; ++i169k ) { |
165 | 169k | Ops[i * 2 + 1] = Fields[i].first; |
166 | 169k | Ops[i * 2 + 2] = createConstant(ConstantInt::get(Int64, Fields[i].second)); |
167 | 169k | } |
168 | 16.6k | return MDNode::get(Context, Ops); |
169 | 16.6k | } |
170 | | |
171 | | /// \brief Return metadata for a TBAA scalar type node with the |
172 | | /// given name, an offset and a parent in the TBAA type DAG. |
173 | | MDNode *MDBuilder::createTBAAScalarTypeNode(StringRef Name, MDNode *Parent, |
174 | 87.2k | uint64_t Offset) { |
175 | 87.2k | ConstantInt *Off = ConstantInt::get(Type::getInt64Ty(Context), Offset); |
176 | 87.2k | return MDNode::get(Context, |
177 | 87.2k | {createString(Name), Parent, createConstant(Off)}); |
178 | 87.2k | } |
179 | | |
180 | | /// \brief Return metadata for a TBAA tag node with the given |
181 | | /// base type, access type and offset relative to the base type. |
182 | | MDNode *MDBuilder::createTBAAStructTagNode(MDNode *BaseType, MDNode *AccessType, |
183 | 121k | uint64_t Offset, bool IsConstant) { |
184 | 121k | IntegerType *Int64 = Type::getInt64Ty(Context); |
185 | 121k | ConstantInt *Off = ConstantInt::get(Int64, Offset); |
186 | 121k | if (IsConstant121k ) { |
187 | 0 | return MDNode::get(Context, {BaseType, AccessType, createConstant(Off), |
188 | 0 | createConstant(ConstantInt::get(Int64, 1))}); |
189 | 0 | } |
190 | 121k | return MDNode::get(Context, {BaseType, AccessType, createConstant(Off)}); |
191 | 121k | } |