1 //===----------------- LLVMContextImpl.h - Implementation ------*- C++ -*--===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares LLVMContextImpl, the opaque implementation
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_LLVMCONTEXT_IMPL_H
16 #define LLVM_LLVMCONTEXT_IMPL_H
18 #include "ConstantsContext.h"
19 #include "LeaksContext.h"
20 #include "TypesContext.h"
21 #include "llvm/LLVMContext.h"
22 #include "llvm/Constants.h"
23 #include "llvm/DerivedTypes.h"
24 #include "llvm/System/Mutex.h"
25 #include "llvm/System/RWMutex.h"
26 #include "llvm/Assembly/Writer.h"
27 #include "llvm/ADT/APFloat.h"
28 #include "llvm/ADT/APInt.h"
29 #include "llvm/ADT/DenseMap.h"
30 #include "llvm/ADT/FoldingSet.h"
31 #include "llvm/ADT/StringMap.h"
44 struct DenseMapAPIntKeyInfo {
48 KeyTy(const APInt& V, const Type* Ty) : val(V), type(Ty) {}
49 KeyTy(const KeyTy& that) : val(that.val), type(that.type) {}
50 bool operator==(const KeyTy& that) const {
51 return type == that.type && this->val == that.val;
53 bool operator!=(const KeyTy& that) const {
54 return !this->operator==(that);
57 static inline KeyTy getEmptyKey() { return KeyTy(APInt(1,0), 0); }
58 static inline KeyTy getTombstoneKey() { return KeyTy(APInt(1,1), 0); }
59 static unsigned getHashValue(const KeyTy &Key) {
60 return DenseMapInfo<void*>::getHashValue(Key.type) ^
61 Key.val.getHashValue();
63 static bool isEqual(const KeyTy &LHS, const KeyTy &RHS) {
66 static bool isPod() { return false; }
69 struct DenseMapAPFloatKeyInfo {
72 KeyTy(const APFloat& V) : val(V){}
73 KeyTy(const KeyTy& that) : val(that.val) {}
74 bool operator==(const KeyTy& that) const {
75 return this->val.bitwiseIsEqual(that.val);
77 bool operator!=(const KeyTy& that) const {
78 return !this->operator==(that);
81 static inline KeyTy getEmptyKey() {
82 return KeyTy(APFloat(APFloat::Bogus,1));
84 static inline KeyTy getTombstoneKey() {
85 return KeyTy(APFloat(APFloat::Bogus,2));
87 static unsigned getHashValue(const KeyTy &Key) {
88 return Key.val.getHashValue();
90 static bool isEqual(const KeyTy &LHS, const KeyTy &RHS) {
93 static bool isPod() { return false; }
96 class LLVMContextImpl {
98 sys::SmartRWMutex<true> ConstantsLock;
100 typedef DenseMap<DenseMapAPIntKeyInfo::KeyTy, ConstantInt*,
101 DenseMapAPIntKeyInfo> IntMapTy;
102 IntMapTy IntConstants;
104 typedef DenseMap<DenseMapAPFloatKeyInfo::KeyTy, ConstantFP*,
105 DenseMapAPFloatKeyInfo> FPMapTy;
108 StringMap<MDString*> MDStringCache;
110 ValueMap<char, Type, ConstantAggregateZero> AggZeroConstants;
112 typedef ValueMap<std::vector<Value*>, Type, MDNode, true /*largekey*/>
117 typedef ValueMap<std::vector<Constant*>, ArrayType,
118 ConstantArray, true /*largekey*/> ArrayConstantsTy;
119 ArrayConstantsTy ArrayConstants;
121 typedef ValueMap<std::vector<Constant*>, StructType,
122 ConstantStruct, true /*largekey*/> StructConstantsTy;
123 StructConstantsTy StructConstants;
125 typedef ValueMap<std::vector<Constant*>, VectorType,
126 ConstantVector> VectorConstantsTy;
127 VectorConstantsTy VectorConstants;
129 ValueMap<char, PointerType, ConstantPointerNull> NullPtrConstants;
131 ValueMap<char, Type, UndefValue> UndefValueConstants;
133 ValueMap<ExprMapKeyType, Type, ConstantExpr> ExprConstants;
135 ConstantInt *TheTrueVal;
136 ConstantInt *TheFalseVal;
138 // Lock used for guarding access to the leak detector
139 sys::SmartMutex<true> LLVMObjectsLock;
140 LeakDetectorImpl<Value> LLVMObjects;
142 // Lock used for guarding access to the type maps.
143 sys::SmartMutex<true> TypeMapLock;
145 // Recursive lock used for guarding access to AbstractTypeUsers.
146 // NOTE: The true template parameter means this will no-op when we're not in
147 // multithreaded mode.
148 sys::SmartMutex<true> AbstractTypeUsersLock;
150 // Concrete/Abstract TypeDescriptions - We lazily calculate type descriptions
151 // for types as they are needed. Because resolution of types must invalidate
152 // all of the abstract type descriptions, we keep them in a seperate map to
154 TypePrinting ConcreteTypeDescriptions;
155 TypePrinting AbstractTypeDescriptions;
157 TypeMap<ArrayValType, ArrayType> ArrayTypes;
158 TypeMap<VectorValType, VectorType> VectorTypes;
159 TypeMap<PointerValType, PointerType> PointerTypes;
160 TypeMap<FunctionValType, FunctionType> FunctionTypes;
161 TypeMap<StructValType, StructType> StructTypes;
162 TypeMap<IntegerValType, IntegerType> IntegerTypes;
167 const Type *DoubleTy;
168 const Type *MetadataTy;
169 const Type *X86_FP80Ty;
171 const Type *PPC_FP128Ty;
173 const IntegerType *Int1Ty;
174 const IntegerType *Int8Ty;
175 const IntegerType *Int16Ty;
176 const IntegerType *Int32Ty;
177 const IntegerType *Int64Ty;
179 /// ValueHandles - This map keeps track of all of the value handles that are
180 /// watching a Value*. The Value::HasValueHandle bit is used to know
181 // whether or not a value has an entry in this map.
182 typedef DenseMap<Value*, ValueHandleBase*> ValueHandlesTy;
183 ValueHandlesTy ValueHandles;
185 LLVMContextImpl(LLVMContext &C) : TheTrueVal(0), TheFalseVal(0),
186 VoidTy(new Type(C, Type::VoidTyID)),
187 LabelTy(new Type(C, Type::LabelTyID)),
188 FloatTy(new Type(C, Type::FloatTyID)),
189 DoubleTy(new Type(C, Type::DoubleTyID)),
190 MetadataTy(new Type(C, Type::MetadataTyID)),
191 X86_FP80Ty(new Type(C, Type::X86_FP80TyID)),
192 FP128Ty(new Type(C, Type::FP128TyID)),
193 PPC_FP128Ty(new Type(C, Type::PPC_FP128TyID)),
194 Int1Ty(new IntegerType(C, 1)),
195 Int8Ty(new IntegerType(C, 8)),
196 Int16Ty(new IntegerType(C, 16)),
197 Int32Ty(new IntegerType(C, 32)),
198 Int64Ty(new IntegerType(C, 64)) { }
201 // In principle, we should delete the member types here. However,
202 // this causes destruction order issues with the types in the TypeMaps.
203 // For now, just leak this, which is at least not a regression from the
204 // previous behavior, though still undesirable.