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//===-- llvm/LLVMContext.h - Class for managing "global" state --*- 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 LLVMContext, a container of "global" state in LLVM, such
// as the global type and constant uniquing tables.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LLVMCONTEXT_H
#define LLVM_LLVMCONTEXT_H
#include "llvm/Support/DataTypes.h"
#include <vector>
#include <string>
namespace llvm {
class APFloat;
class APInt;
class ArrayType;
class Constant;
class ConstantAggregateZero;
class ConstantArray;
class ConstantFP;
class ConstantInt;
class ConstantPointerNull;
class ConstantStruct;
class ConstantVector;
class FunctionType;
class IntegerType;
class LLVMContextImpl;
class MDNode;
class MDString;
class OpaqueType;
class PointerType;
class StringRef;
class StructType;
class Type;
class UndefValue;
class Use;
class Value;
class VectorType;
/// This is an important class for using LLVM in a threaded context. It
/// (opaquely) owns and manages the core "global" data of LLVM's core
/// infrastructure, including the type and constant uniquing tables.
/// LLVMContext itself provides no locking guarantees, so you should be careful
/// to have one context per thread.
class LLVMContext {
LLVMContextImpl* pImpl;
friend class ConstantInt;
friend class ConstantFP;
friend class ConstantStruct;
friend class ConstantArray;
friend class ConstantVector;
public:
LLVMContext();
~LLVMContext();
// Constant accessors
Constant* getNullValue(const Type* Ty);
/// @returns the value for an integer constant of the given type that has all
/// its bits set to true.
/// @brief Get the all ones value
Constant* getAllOnesValue(const Type* Ty);
// UndefValue accessors
UndefValue* getUndef(const Type* Ty);
// ConstantInt accessors
ConstantInt* getTrue();
ConstantInt* getFalse();
// ConstantPointerNull accessors
ConstantPointerNull* getConstantPointerNull(const PointerType* T);
// ConstantAggregateZero accessors
ConstantAggregateZero* getConstantAggregateZero(const Type* Ty);
// MDNode accessors
MDNode* getMDNode(Value* const* Vals, unsigned NumVals);
// MDString accessors
MDString* getMDString(const StringRef &Str);
// FunctionType accessors
FunctionType* getFunctionType(const Type* Result, bool isVarArg);
FunctionType* getFunctionType(const Type* Result,
const std::vector<const Type*>& Params,
bool isVarArg);
// IntegerType accessors
const IntegerType* getIntegerType(unsigned NumBits);
// OpaqueType accessors
OpaqueType* getOpaqueType();
// StructType accessors
StructType* getStructType(bool isPacked=false);
StructType* getStructType(const std::vector<const Type*>& Params,
bool isPacked = false);
StructType* getStructType(const Type* type, ...);
// ArrayType accessors
ArrayType* getArrayType(const Type* ElementType, uint64_t NumElements);
// PointerType accessors
PointerType* getPointerType(const Type* ElementType, unsigned AddressSpace);
PointerType* getPointerTypeUnqual(const Type* ElementType);
// VectorType accessors
VectorType* getVectorType(const Type* ElementType, unsigned NumElements);
VectorType* getVectorTypeInteger(const VectorType* VTy);
VectorType* getVectorTypeExtendedElement(const VectorType* VTy);
VectorType* getVectorTypeTruncatedElement(const VectorType* VTy);
// Other helpers
/// @brief Create a result type for fcmp/icmp
const Type* makeCmpResultType(const Type* opnd_type);
// Methods for erasing constants
void erase(MDString *M);
void erase(MDNode *M);
void erase(ConstantAggregateZero *Z);
};
/// FOR BACKWARDS COMPATIBILITY - Returns a global context.
extern LLVMContext& getGlobalContext();
}
#endif
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