1 //===-- LLVMContextImpl.h - The LLVMContextImpl opaque class --------------===//
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/Metadata.h"
23 #include "llvm/Constants.h"
24 #include "llvm/DerivedTypes.h"
25 #include "llvm/Assembly/Writer.h"
26 #include "llvm/Support/ValueHandle.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/SmallPtrSet.h"
32 #include "llvm/ADT/StringMap.h"
45 struct DenseMapAPIntKeyInfo {
49 KeyTy(const APInt& V, const Type* Ty) : val(V), type(Ty) {}
50 KeyTy(const KeyTy& that) : val(that.val), type(that.type) {}
51 bool operator==(const KeyTy& that) const {
52 return type == that.type && this->val == that.val;
54 bool operator!=(const KeyTy& that) const {
55 return !this->operator==(that);
58 static inline KeyTy getEmptyKey() { return KeyTy(APInt(1,0), 0); }
59 static inline KeyTy getTombstoneKey() { return KeyTy(APInt(1,1), 0); }
60 static unsigned getHashValue(const KeyTy &Key) {
61 return DenseMapInfo<void*>::getHashValue(Key.type) ^
62 Key.val.getHashValue();
64 static bool isEqual(const KeyTy &LHS, const KeyTy &RHS) {
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) {
95 class LLVMContextImpl {
97 typedef DenseMap<DenseMapAPIntKeyInfo::KeyTy, ConstantInt*,
98 DenseMapAPIntKeyInfo> IntMapTy;
99 IntMapTy IntConstants;
101 typedef DenseMap<DenseMapAPFloatKeyInfo::KeyTy, ConstantFP*,
102 DenseMapAPFloatKeyInfo> FPMapTy;
105 StringMap<MDString*> MDStringCache;
107 FoldingSet<MDNode> MDNodeSet;
109 ConstantUniqueMap<char, Type, ConstantAggregateZero> AggZeroConstants;
111 typedef ConstantUniqueMap<std::vector<Constant*>, ArrayType,
112 ConstantArray, true /*largekey*/> ArrayConstantsTy;
113 ArrayConstantsTy ArrayConstants;
115 typedef ConstantUniqueMap<std::vector<Constant*>, StructType,
116 ConstantStruct, true /*largekey*/> StructConstantsTy;
117 StructConstantsTy StructConstants;
119 typedef ConstantUniqueMap<std::vector<Constant*>, VectorType,
120 ConstantVector> VectorConstantsTy;
121 VectorConstantsTy VectorConstants;
123 ConstantUniqueMap<char, PointerType, ConstantPointerNull> NullPtrConstants;
125 ConstantUniqueMap<char, Type, UndefValue> UndefValueConstants;
127 DenseMap<std::pair<Function*, BasicBlock*> , BlockAddress*> BlockAddresses;
128 ConstantUniqueMap<ExprMapKeyType, Type, ConstantExpr> ExprConstants;
130 ConstantInt *TheTrueVal;
131 ConstantInt *TheFalseVal;
133 LeakDetectorImpl<Value> LLVMObjects;
135 // Basic type instances.
140 const Type MetadataTy;
141 const Type X86_FP80Ty;
143 const Type PPC_FP128Ty;
144 const IntegerType Int1Ty;
145 const IntegerType Int8Ty;
146 const IntegerType Int16Ty;
147 const IntegerType Int32Ty;
148 const IntegerType Int64Ty;
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;
164 // Opaque types are not structurally uniqued, so don't use TypeMap.
165 typedef SmallPtrSet<const OpaqueType*, 8> OpaqueTypesTy;
166 OpaqueTypesTy OpaqueTypes;
168 /// Used as an abstract type that will never be resolved.
169 OpaqueType *const AlwaysOpaqueTy;
172 /// ValueHandles - This map keeps track of all of the value handles that are
173 /// watching a Value*. The Value::HasValueHandle bit is used to know
174 // whether or not a value has an entry in this map.
175 typedef DenseMap<Value*, ValueHandleBase*> ValueHandlesTy;
176 ValueHandlesTy ValueHandles;
178 /// CustomMDKindNames - Map to hold the metadata string to ID mapping.
179 StringMap<unsigned> CustomMDKindNames;
181 typedef std::pair<unsigned, TrackingVH<MDNode> > MDPairTy;
182 typedef SmallVector<MDPairTy, 2> MDMapTy;
184 /// MetadataStore - Collection of per-instruction metadata used in this
186 DenseMap<const Instruction *, MDMapTy> MetadataStore;
189 LLVMContextImpl(LLVMContext &C) : TheTrueVal(0), TheFalseVal(0),
190 VoidTy(C, Type::VoidTyID),
191 LabelTy(C, Type::LabelTyID),
192 FloatTy(C, Type::FloatTyID),
193 DoubleTy(C, Type::DoubleTyID),
194 MetadataTy(C, Type::MetadataTyID),
195 X86_FP80Ty(C, Type::X86_FP80TyID),
196 FP128Ty(C, Type::FP128TyID),
197 PPC_FP128Ty(C, Type::PPC_FP128TyID),
203 AlwaysOpaqueTy(new OpaqueType(C)) {
204 // Make sure the AlwaysOpaqueTy stays alive as long as the Context.
205 AlwaysOpaqueTy->addRef();
206 OpaqueTypes.insert(AlwaysOpaqueTy);
210 ExprConstants.freeConstants();
211 ArrayConstants.freeConstants();
212 StructConstants.freeConstants();
213 VectorConstants.freeConstants();
214 AggZeroConstants.freeConstants();
215 NullPtrConstants.freeConstants();
216 UndefValueConstants.freeConstants();
217 for (IntMapTy::iterator I = IntConstants.begin(), E = IntConstants.end();
219 if (I->second->use_empty())
222 for (FPMapTy::iterator I = FPConstants.begin(), E = FPConstants.end();
224 if (I->second->use_empty())
228 AlwaysOpaqueTy->dropRef();
229 for (OpaqueTypesTy::iterator I = OpaqueTypes.begin(), E = OpaqueTypes.end();
231 (*I)->AbstractTypeUsers.clear();