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//===----------------- LLVMContextImpl.h - Implementation ------*- C++ -*--===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares LLVMContextImpl, the opaque implementation
// of LLVMContext.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LLVMCONTEXT_IMPL_H
#define LLVM_LLVMCONTEXT_IMPL_H
#include "llvm/LLVMContext.h"
#include "llvm/DerivedTypes.h"
#include "llvm/System/RWMutex.h"
#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/StringMap.h"
namespace llvm {
class ConstantInt;
class ConstantFP;
class MDString;
class MDNode;
class LLVMContext;
class Type;
class Value;
struct DenseMapAPIntKeyInfo {
struct KeyTy {
APInt val;
const Type* type;
KeyTy(const APInt& V, const Type* Ty) : val(V), type(Ty) {}
KeyTy(const KeyTy& that) : val(that.val), type(that.type) {}
bool operator==(const KeyTy& that) const {
return type == that.type && this->val == that.val;
}
bool operator!=(const KeyTy& that) const {
return !this->operator==(that);
}
};
static inline KeyTy getEmptyKey() { return KeyTy(APInt(1,0), 0); }
static inline KeyTy getTombstoneKey() { return KeyTy(APInt(1,1), 0); }
static unsigned getHashValue(const KeyTy &Key) {
return DenseMapInfo<void*>::getHashValue(Key.type) ^
Key.val.getHashValue();
}
static bool isEqual(const KeyTy &LHS, const KeyTy &RHS) {
return LHS == RHS;
}
static bool isPod() { return false; }
};
struct DenseMapAPFloatKeyInfo {
struct KeyTy {
APFloat val;
KeyTy(const APFloat& V) : val(V){}
KeyTy(const KeyTy& that) : val(that.val) {}
bool operator==(const KeyTy& that) const {
return this->val.bitwiseIsEqual(that.val);
}
bool operator!=(const KeyTy& that) const {
return !this->operator==(that);
}
};
static inline KeyTy getEmptyKey() {
return KeyTy(APFloat(APFloat::Bogus,1));
}
static inline KeyTy getTombstoneKey() {
return KeyTy(APFloat(APFloat::Bogus,2));
}
static unsigned getHashValue(const KeyTy &Key) {
return Key.val.getHashValue();
}
static bool isEqual(const KeyTy &LHS, const KeyTy &RHS) {
return LHS == RHS;
}
static bool isPod() { return false; }
};
class LLVMContextImpl {
sys::SmartRWMutex<true> ConstantsLock;
typedef DenseMap<DenseMapAPIntKeyInfo::KeyTy, ConstantInt*,
DenseMapAPIntKeyInfo> IntMapTy;
IntMapTy IntConstants;
typedef DenseMap<DenseMapAPFloatKeyInfo::KeyTy, ConstantFP*,
DenseMapAPFloatKeyInfo> FPMapTy;
FPMapTy FPConstants;
StringMap<MDString*> MDStringCache;
FoldingSet<MDNode> MDNodeSet;
LLVMContext &Context;
ConstantInt *TheTrueVal;
ConstantInt *TheFalseVal;
LLVMContextImpl();
LLVMContextImpl(const LLVMContextImpl&);
public:
LLVMContextImpl(LLVMContext &C) : Context(C), TheTrueVal(0), TheFalseVal(0) {}
/// Return a ConstantInt with the specified value and an implied Type. The
/// type is the integer type that corresponds to the bit width of the value.
ConstantInt *getConstantInt(const APInt &V);
ConstantFP *getConstantFP(const APFloat &V);
MDString *getMDString(const char *StrBegin, const char *StrEnd);
MDNode *getMDNode(Value*const* Vals, unsigned NumVals);
ConstantInt *getTrue() {
if (TheTrueVal)
return TheTrueVal;
else
return (TheTrueVal = Context.getConstantInt(IntegerType::get(1), 1));
}
ConstantInt *getFalse() {
if (TheFalseVal)
return TheFalseVal;
else
return (TheFalseVal = Context.getConstantInt(IntegerType::get(1), 0));
}
void erase(MDString *M);
void erase(MDNode *M);
};
}
#endif
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