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283 lines
12 KiB
C++
283 lines
12 KiB
C++
//===-- llvm/LLVMContext.h - Class for managing "global" state --*- 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 LLVMContext, a container of "global" state in LLVM, such
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// as the global type and constant uniquing tables.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LLVMCONTEXT_H
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#define LLVM_LLVMCONTEXT_H
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#include "llvm/Support/DataTypes.h"
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#include <vector>
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#include <string>
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namespace llvm {
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class LLVMContextImpl;
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class Constant;
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class ConstantInt;
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class ConstantPointerNull;
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class ConstantStruct;
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class ConstantAggregateZero;
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class ConstantArray;
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class ConstantFP;
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class ConstantVector;
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class UndefValue;
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class MDNode;
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class MDString;
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class IntegerType;
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class PointerType;
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class StructType;
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class ArrayType;
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class VectorType;
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class OpaqueType;
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class FunctionType;
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class Type;
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class APInt;
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class APFloat;
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class Value;
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/// This is an important class for using LLVM in a threaded context. It
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/// (opaquely) owns and manages the core "global" data of LLVM's core
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/// infrastructure, including the type and constant uniquing tables.
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/// LLVMContext itself provides no locking guarantees, so you should be careful
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/// to have one context per thread.
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class LLVMContext {
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LLVMContextImpl* pImpl;
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public:
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LLVMContext();
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~LLVMContext();
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// Constant accessors
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Constant* getNullValue(const Type* Ty);
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/// @returns the value for an integer constant of the given type that has all
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/// its bits set to true.
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/// @brief Get the all ones value
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Constant* getAllOnesValue(const Type* Ty);
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// UndefValue accessors
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UndefValue* getUndef(const Type* Ty);
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// ConstantInt accessors
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ConstantInt* getConstantIntTrue();
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ConstantInt* getConstantIntFalse();
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/// If Ty is a vector type, return a Constant with a splat of the given
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/// value. Otherwise return a ConstantInt for the given value.
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Constant* getConstantInt(const Type* Ty, uint64_t V,
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bool isSigned = false);
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/// Return a ConstantInt with the specified integer value for the specified
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/// type. If the type is wider than 64 bits, the value will be zero-extended
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/// to fit the type, unless isSigned is true, in which case the value will
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/// be interpreted as a 64-bit signed integer and sign-extended to fit
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/// the type.
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/// @brief Get a ConstantInt for a specific value.
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ConstantInt* getConstantInt(const IntegerType* Ty, uint64_t V,
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bool isSigned = false);
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/// Return a ConstantInt with the specified value for the specified type. The
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/// value V will be canonicalized to a an unsigned APInt. Accessing it with
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/// either getSExtValue() or getZExtValue() will yield a correctly sized and
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/// signed value for the type Ty.
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/// @brief Get a ConstantInt for a specific signed value.
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ConstantInt* getConstantIntSigned(const IntegerType* Ty, int64_t V);
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Constant *getConstantIntSigned(const Type *Ty, int64_t V);
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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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/// If Ty is a vector type, return a Constant with a splat of the given
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/// value. Otherwise return a ConstantInt for the given value.
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Constant* getConstantInt(const Type* Ty, const APInt& V);
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// ConstantPointerNull accessors
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ConstantPointerNull* getConstantPointerNull(const PointerType* T);
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// ConstantStruct accessors
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Constant* getConstantStruct(const StructType* T,
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const std::vector<Constant*>& V);
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Constant* getConstantStruct(const std::vector<Constant*>& V,
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bool Packed = false);
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Constant* getConstantStruct(Constant* const *Vals, unsigned NumVals,
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bool Packed = false);
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// ConstantAggregateZero accessors
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ConstantAggregateZero* getConstantAggregateZero(const Type* Ty);
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// ConstantArray accessors
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Constant* getConstantArray(const ArrayType* T,
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const std::vector<Constant*>& V);
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Constant* getConstantArray(const ArrayType* T, Constant* const* Vals,
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unsigned NumVals);
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/// This method constructs a ConstantArray and initializes it with a text
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/// string. The default behavior (AddNull==true) causes a null terminator to
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/// be placed at the end of the array. This effectively increases the length
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/// of the array by one (you've been warned). However, in some situations
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/// this is not desired so if AddNull==false then the string is copied without
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/// null termination.
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Constant* getConstantArray(const std::string& Initializer,
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bool AddNull = true);
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// ConstantExpr accessors
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Constant* getConstantExpr(unsigned Opcode, Constant* C1, Constant* C2);
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Constant* getConstantExprTrunc(Constant* C, const Type* Ty);
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Constant* getConstantExprSExt(Constant* C, const Type* Ty);
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Constant* getConstantExprZExt(Constant* C, const Type* Ty);
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Constant* getConstantExprFPTrunc(Constant* C, const Type* Ty);
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Constant* getConstantExprFPExtend(Constant* C, const Type* Ty);
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Constant* getConstantExprUIToFP(Constant* C, const Type* Ty);
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Constant* getConstantExprSIToFP(Constant* C, const Type* Ty);
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Constant* getConstantExprFPToUI(Constant* C, const Type* Ty);
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Constant* getConstantExprFPToSI(Constant* C, const Type* Ty);
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Constant* getConstantExprPtrToInt(Constant* C, const Type* Ty);
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Constant* getConstantExprIntToPtr(Constant* C, const Type* Ty);
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Constant* getConstantExprBitCast(Constant* C, const Type* Ty);
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Constant* getConstantExprCast(unsigned ops, Constant* C, const Type* Ty);
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Constant* getConstantExprZExtOrBitCast(Constant* C, const Type* Ty);
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Constant* getConstantExprSExtOrBitCast(Constant* C, const Type* Ty);
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Constant* getConstantExprTruncOrBitCast(Constant* C, const Type* Ty);
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Constant* getConstantExprPointerCast(Constant* C, const Type* Ty);
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Constant* getConstantExprIntegerCast(Constant* C, const Type* Ty,
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bool isSigned);
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Constant* getConstantExprFPCast(Constant* C, const Type* Ty);
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Constant* getConstantExprSelect(Constant* C, Constant* V1, Constant* V2);
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/// getAlignOf constant expr - computes the alignment of a type in a target
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/// independent way (Note: the return type is an i32; Note: assumes that i8
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/// is byte aligned).
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///
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Constant* getConstantExprAlignOf(const Type* Ty);
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Constant* getConstantExprCompare(unsigned short pred,
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Constant* C1, Constant* C2);
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Constant* getConstantExprNeg(Constant* C);
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Constant* getConstantExprFNeg(Constant* C);
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Constant* getConstantExprNot(Constant* C);
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Constant* getConstantExprAdd(Constant* C1, Constant* C2);
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Constant* getConstantExprFAdd(Constant* C1, Constant* C2);
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Constant* getConstantExprSub(Constant* C1, Constant* C2);
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Constant* getConstantExprFSub(Constant* C1, Constant* C2);
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Constant* getConstantExprMul(Constant* C1, Constant* C2);
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Constant* getConstantExprFMul(Constant* C1, Constant* C2);
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Constant* getConstantExprUDiv(Constant* C1, Constant* C2);
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Constant* getConstantExprSDiv(Constant* C1, Constant* C2);
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Constant* getConstantExprFDiv(Constant* C1, Constant* C2);
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Constant* getConstantExprURem(Constant* C1, Constant* C2);
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Constant* getConstantExprSRem(Constant* C1, Constant* C2);
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Constant* getConstantExprFRem(Constant* C1, Constant* C2);
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Constant* getConstantExprAnd(Constant* C1, Constant* C2);
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Constant* getConstantExprOr(Constant* C1, Constant* C2);
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Constant* getConstantExprXor(Constant* C1, Constant* C2);
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Constant* getConstantExprICmp(unsigned short pred, Constant* LHS,
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Constant* RHS);
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Constant* getConstantExprFCmp(unsigned short pred, Constant* LHS,
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Constant* RHS);
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Constant* getConstantExprShl(Constant* C1, Constant* C2);
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Constant* getConstantExprLShr(Constant* C1, Constant* C2);
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Constant* getConstantExprAShr(Constant* C1, Constant* C2);
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Constant* getConstantExprGetElementPtr(Constant* C, Constant* const* IdxList,
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unsigned NumIdx);
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Constant* getConstantExprGetElementPtr(Constant* C, Value* const* IdxList,
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unsigned NumIdx);
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Constant* getConstantExprExtractElement(Constant* Vec, Constant* Idx);
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Constant* getConstantExprInsertElement(Constant* Vec, Constant* Elt,
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Constant* Idx);
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Constant* getConstantExprShuffleVector(Constant* V1, Constant* V2,
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Constant* Mask);
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Constant* getConstantExprExtractValue(Constant* Agg, const unsigned* IdxList,
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unsigned NumIdx);
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Constant* getConstantExprInsertValue(Constant* Agg, Constant* Val,
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const unsigned* IdxList,
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unsigned NumIdx);
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/// getSizeOf constant expr - computes the size of a type in a target
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/// independent way (Note: the return type is an i64).
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///
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Constant* getConstantExprSizeOf(const Type* Ty);
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/// Floating point negation must be implemented with f(x) = -0.0 - x. This
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/// method returns the negative zero constant for floating point or vector
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/// floating point types; for all other types, it returns the null value.
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Constant* getZeroValueForNegation(const Type* Ty);
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// ConstantFP accessors
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ConstantFP* getConstantFP(const APFloat& V);
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/// get() - This returns a ConstantFP, or a vector containing a splat of a
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/// ConstantFP, for the specified value in the specified type. This should
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/// only be used for simple constant values like 2.0/1.0 etc, that are
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/// known-valid both as host double and as the target format.
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Constant* getConstantFP(const Type* Ty, double V);
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ConstantFP* getConstantFPNegativeZero(const Type* Ty);
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// ConstantVector accessors
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Constant* getConstantVector(const VectorType* T,
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const std::vector<Constant*>& V);
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Constant* getConstantVector(const std::vector<Constant*>& V);
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Constant* getConstantVector(Constant* const* Vals, unsigned NumVals);
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// MDNode accessors
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MDNode* getMDNode(Value* const* Vals, unsigned NumVals);
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// MDString accessors
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MDString* getMDString(const char *StrBegin, const char *StrEnd);
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MDString* getMDString(const std::string &Str);
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// FunctionType accessors
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FunctionType* getFunctionType(const Type* Result, bool isVarArg);
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FunctionType* getFunctionType(const Type* Result,
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const std::vector<const Type*>& Params,
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bool isVarArg);
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// IntegerType accessors
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const IntegerType* getIntegerType(unsigned NumBits);
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// OpaqueType accessors
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OpaqueType* getOpaqueType();
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// StructType accessors
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StructType* getStructType(bool isPacked=false);
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StructType* getStructType(const std::vector<const Type*>& Params,
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bool isPacked = false);
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StructType* getStructType(const Type* type, ...);
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// ArrayType accessors
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ArrayType* getArrayType(const Type* ElementType, uint64_t NumElements);
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// PointerType accessors
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PointerType* getPointerType(const Type* ElementType, unsigned AddressSpace);
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PointerType* getPointerTypeUnqual(const Type* ElementType);
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// VectorType accessors
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VectorType* getVectorType(const Type* ElementType, unsigned NumElements);
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VectorType* getVectorTypeInteger(const VectorType* VTy);
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VectorType* getVectorTypeExtendedElement(const VectorType* VTy);
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VectorType* getVectorTypeTruncatedElement(const VectorType* VTy);
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// Other helpers
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/// @brief Create a result type for fcmp/icmp
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const Type* makeCmpResultType(const Type* opnd_type);
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// Methods for erasing constants
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void erase(MDString *M);
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void erase(MDNode *M);
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};
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/// FOR BACKWARDS COMPATIBILITY - Returns a global context.
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extern LLVMContext& getGlobalContext();
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}
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#endif
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