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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76639 91177308-0d34-0410-b5e6-96231b3b80d8
173 lines
4.8 KiB
C++
173 lines
4.8 KiB
C++
//===----------------- LLVMContextImpl.h - Implementation ------*- C++ -*--===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares LLVMContextImpl, the opaque implementation
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// of LLVMContext.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LLVMCONTEXT_IMPL_H
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#define LLVM_LLVMCONTEXT_IMPL_H
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#include "llvm/LLVMContext.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/System/Mutex.h"
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#include "llvm/System/RWMutex.h"
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#include "llvm/ADT/APFloat.h"
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#include "llvm/ADT/APInt.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/FoldingSet.h"
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#include "llvm/ADT/StringMap.h"
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#include <map>
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template<class ValType, class TypeClass, class ConstantClass,
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bool HasLargeKey = false /*true for arrays and structs*/ >
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class ValueMap;
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namespace llvm {
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template<class ValType>
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struct ConstantTraits;
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class ConstantInt;
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class ConstantFP;
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class MDString;
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class MDNode;
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class LLVMContext;
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class Type;
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class Value;
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struct DenseMapAPIntKeyInfo {
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struct KeyTy {
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APInt val;
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const Type* type;
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KeyTy(const APInt& V, const Type* Ty) : val(V), type(Ty) {}
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KeyTy(const KeyTy& that) : val(that.val), type(that.type) {}
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bool operator==(const KeyTy& that) const {
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return type == that.type && this->val == that.val;
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}
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bool operator!=(const KeyTy& that) const {
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return !this->operator==(that);
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}
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};
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static inline KeyTy getEmptyKey() { return KeyTy(APInt(1,0), 0); }
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static inline KeyTy getTombstoneKey() { return KeyTy(APInt(1,1), 0); }
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static unsigned getHashValue(const KeyTy &Key) {
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return DenseMapInfo<void*>::getHashValue(Key.type) ^
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Key.val.getHashValue();
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}
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static bool isEqual(const KeyTy &LHS, const KeyTy &RHS) {
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return LHS == RHS;
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}
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static bool isPod() { return false; }
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};
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struct DenseMapAPFloatKeyInfo {
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struct KeyTy {
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APFloat val;
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KeyTy(const APFloat& V) : val(V){}
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KeyTy(const KeyTy& that) : val(that.val) {}
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bool operator==(const KeyTy& that) const {
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return this->val.bitwiseIsEqual(that.val);
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}
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bool operator!=(const KeyTy& that) const {
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return !this->operator==(that);
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}
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};
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static inline KeyTy getEmptyKey() {
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return KeyTy(APFloat(APFloat::Bogus,1));
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}
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static inline KeyTy getTombstoneKey() {
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return KeyTy(APFloat(APFloat::Bogus,2));
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}
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static unsigned getHashValue(const KeyTy &Key) {
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return Key.val.getHashValue();
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}
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static bool isEqual(const KeyTy &LHS, const KeyTy &RHS) {
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return LHS == RHS;
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}
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static bool isPod() { return false; }
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};
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class LLVMContextImpl {
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sys::SmartRWMutex<true> ConstantsLock;
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typedef DenseMap<DenseMapAPIntKeyInfo::KeyTy, ConstantInt*,
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DenseMapAPIntKeyInfo> IntMapTy;
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IntMapTy IntConstants;
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typedef DenseMap<DenseMapAPFloatKeyInfo::KeyTy, ConstantFP*,
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DenseMapAPFloatKeyInfo> FPMapTy;
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FPMapTy FPConstants;
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StringMap<MDString*> MDStringCache;
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FoldingSet<MDNode> MDNodeSet;
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ValueMap<char, Type, ConstantAggregateZero> *AggZeroConstants;
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typedef ValueMap<std::vector<Constant*>, ArrayType,
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ConstantArray, true /*largekey*/> ArrayConstantsTy;
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ArrayConstantsTy *ArrayConstants;
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LLVMContext &Context;
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ConstantInt *TheTrueVal;
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ConstantInt *TheFalseVal;
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LLVMContextImpl();
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LLVMContextImpl(const LLVMContextImpl&);
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public:
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LLVMContextImpl(LLVMContext &C);
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~LLVMContextImpl();
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/// Return a ConstantInt with the specified value and an implied Type. The
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/// type is the integer type that corresponds to the bit width of the value.
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ConstantInt *getConstantInt(const APInt &V);
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ConstantFP *getConstantFP(const APFloat &V);
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MDString *getMDString(const char *StrBegin, const char *StrEnd);
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MDNode *getMDNode(Value*const* Vals, unsigned NumVals);
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ConstantAggregateZero *getConstantAggregateZero(const Type *Ty);
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Constant *getConstantArray(const ArrayType *Ty,
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const std::vector<Constant*> &V);
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ConstantInt *getTrue() {
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if (TheTrueVal)
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return TheTrueVal;
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else
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return (TheTrueVal = Context.getConstantInt(IntegerType::get(1), 1));
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}
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ConstantInt *getFalse() {
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if (TheFalseVal)
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return TheFalseVal;
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else
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return (TheFalseVal = Context.getConstantInt(IntegerType::get(1), 0));
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}
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void erase(MDString *M);
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void erase(MDNode *M);
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void erase(ConstantAggregateZero *Z);
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void erase(ConstantArray *C);
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// RAUW helpers
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Constant *replaceUsesOfWithOnConstant(ConstantArray *CA, Value *From,
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Value *To, Use *U);
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};
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}
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#endif
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