lib/VMCore/LLVMContextImpl.h

   1 //===----------------- LLVMContextImpl.h - Implementation ------*- C++ -*--===//
   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 declares LLVMContextImpl, the opaque implementation
  11 //  of LLVMContext.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef LLVM_LLVMCONTEXT_IMPL_H
  16 #define LLVM_LLVMCONTEXT_IMPL_H
  17
  18 #include "ConstantsContext.h"
  19 #include "TypesContext.h"
  20 #include "llvm/LLVMContext.h"
  21 #include "llvm/Constants.h"
  22 #include "llvm/DerivedTypes.h"
  23 #include "llvm/System/RWMutex.h"
  24 #include "llvm/ADT/APFloat.h"
  25 #include "llvm/ADT/APInt.h"
  26 #include "llvm/ADT/DenseMap.h"
  27 #include "llvm/ADT/FoldingSet.h"
  28 #include "llvm/ADT/StringMap.h"
  29 #include <vector>
  30
  31 namespace llvm {
  32
  33 class ConstantInt;
  34 class ConstantFP;
  35 class MDString;
  36 class MDNode;
  37 class LLVMContext;
  38 class Type;
  39 class Value;
  40
  41 struct DenseMapAPIntKeyInfo {
  42   struct KeyTy {
  43     APInt val;
  44     const Type* type;
  45     KeyTy(const APInt& V, const Type* Ty) : val(V), type(Ty) {}
  46     KeyTy(const KeyTy& that) : val(that.val), type(that.type) {}
  47     bool operator==(const KeyTy& that) const {
  48       return type == that.type && this->val == that.val;
  49     }
  50     bool operator!=(const KeyTy& that) const {
  51       return !this->operator==(that);
  52     }
  53   };
  54   static inline KeyTy getEmptyKey() { return KeyTy(APInt(1,0), 0); }
  55   static inline KeyTy getTombstoneKey() { return KeyTy(APInt(1,1), 0); }
  56   static unsigned getHashValue(const KeyTy &Key) {
  57     return DenseMapInfo<void*>::getHashValue(Key.type) ^
  58       Key.val.getHashValue();
  59   }
  60   static bool isEqual(const KeyTy &LHS, const KeyTy &RHS) {
  61     return LHS == RHS;
  62   }
  63   static bool isPod() { return false; }
  64 };
  65
  66 struct DenseMapAPFloatKeyInfo {
  67   struct KeyTy {
  68     APFloat val;
  69     KeyTy(const APFloat& V) : val(V){}
  70     KeyTy(const KeyTy& that) : val(that.val) {}
  71     bool operator==(const KeyTy& that) const {
  72       return this->val.bitwiseIsEqual(that.val);
  73     }
  74     bool operator!=(const KeyTy& that) const {
  75       return !this->operator==(that);
  76     }
  77   };
  78   static inline KeyTy getEmptyKey() {
  79     return KeyTy(APFloat(APFloat::Bogus,1));
  80   }
  81   static inline KeyTy getTombstoneKey() {
  82     return KeyTy(APFloat(APFloat::Bogus,2));
  83   }
  84   static unsigned getHashValue(const KeyTy &Key) {
  85     return Key.val.getHashValue();
  86   }
  87   static bool isEqual(const KeyTy &LHS, const KeyTy &RHS) {
  88     return LHS == RHS;
  89   }
  90   static bool isPod() { return false; }
  91 };
  92
  93 class LLVMContextImpl {
  94 public:
  95   sys::SmartRWMutex<true> ConstantsLock;
  96
  97   typedef DenseMap<DenseMapAPIntKeyInfo::KeyTy, ConstantInt*,
  98                          DenseMapAPIntKeyInfo> IntMapTy;
  99   IntMapTy IntConstants;
 100
 101   typedef DenseMap<DenseMapAPFloatKeyInfo::KeyTy, ConstantFP*,
 102                          DenseMapAPFloatKeyInfo> FPMapTy;
 103   FPMapTy FPConstants;
 104
 105   StringMap<MDString*> MDStringCache;
 106
 107   ValueMap<char, Type, ConstantAggregateZero> AggZeroConstants;
 108
 109   typedef ValueMap<std::vector<Value*>, Type, MDNode, true /*largekey*/>
 110   MDNodeMapTy;
 111
 112   MDNodeMapTy MDNodes;
 113
 114   typedef ValueMap<std::vector<Constant*>, ArrayType,
 115     ConstantArray, true /*largekey*/> ArrayConstantsTy;
 116   ArrayConstantsTy ArrayConstants;
 117
 118   typedef ValueMap<std::vector<Constant*>, StructType,
 119                    ConstantStruct, true /*largekey*/> StructConstantsTy;
 120   StructConstantsTy StructConstants;
 121
 122   typedef ValueMap<std::vector<Constant*>, VectorType,
 123                    ConstantVector> VectorConstantsTy;
 124   VectorConstantsTy VectorConstants;
 125
 126   ValueMap<char, PointerType, ConstantPointerNull> NullPtrConstants;
 127
 128   ValueMap<char, Type, UndefValue> UndefValueConstants;
 129
 130   ValueMap<ExprMapKeyType, Type, ConstantExpr> ExprConstants;
 131
 132   ConstantInt *TheTrueVal;
 133   ConstantInt *TheFalseVal;
 134
 135   TypeMap<ArrayValType, ArrayType> ArrayTypes;
 136   TypeMap<VectorValType, VectorType> VectorTypes;
 137   TypeMap<PointerValType, PointerType> PointerTypes;
 138   TypeMap<FunctionValType, FunctionType> FunctionTypes;
 139   TypeMap<StructValType, StructType> StructTypes;
 140   TypeMap<IntegerValType, IntegerType> IntegerTypes;
 141
 142   const Type *VoidTy;
 143   const Type *LabelTy;
 144   const Type *FloatTy;
 145   const Type *DoubleTy;
 146   const Type *MetadataTy;
 147   const Type *X86_FP80Ty;
 148   const Type *FP128Ty;
 149   const Type *PPC_FP128Ty;
 150
 151   const IntegerType *Int1Ty;
 152   const IntegerType *Int8Ty;
 153   const IntegerType *Int16Ty;
 154   const IntegerType *Int32Ty;
 155   const IntegerType *Int64Ty;
 156
 157   LLVMContextImpl(LLVMContext &C) : TheTrueVal(0), TheFalseVal(0),
 158     VoidTy(new Type(C, Type::VoidTyID)),
 159     LabelTy(new Type(C, Type::LabelTyID)),
 160     FloatTy(new Type(C, Type::FloatTyID)),
 161     DoubleTy(new Type(C, Type::DoubleTyID)),
 162     MetadataTy(new Type(C, Type::MetadataTyID)),
 163     X86_FP80Ty(new Type(C, Type::X86_FP80TyID)),
 164     FP128Ty(new Type(C, Type::FP128TyID)),
 165     PPC_FP128Ty(new Type(C, Type::PPC_FP128TyID)),
 166     Int1Ty(new IntegerType(C, 1)),
 167     Int8Ty(new IntegerType(C, 8)),
 168     Int16Ty(new IntegerType(C, 16)),
 169     Int32Ty(new IntegerType(C, 32)),
 170     Int64Ty(new IntegerType(C, 64)) { }
 171
 172   ~LLVMContextImpl() {
 173     // In principle, we should delete the member types here.  However,
 174     // this causes destruction order issues with the types in the TypeMaps.
 175     // For now, just leak this, which is at least not a regression from the
 176     // previous behavior, though still undesirable.
 177 #if 0
 178     delete VoidTy;
 179     delete LabelTy;
 180     delete FloatTy;
 181     delete DoubleTy;
 182     delete MetadataTy;
 183     delete X86_FP80Ty;
 184     delete FP128Ty;
 185     delete PPC_FP128Ty;
 186
 187     delete Int1Ty;
 188     delete Int8Ty;
 189     delete Int16Ty;
 190     delete Int32Ty;
 191     delete Int64Ty;
 192 #endif
 193   }
 194 };
 195
 196 }
 197
 198 #endif