llvm-6502/include/llvm/Support/TargetFolder.h
2009-07-10 00:49:53 +00:00

219 lines
8.1 KiB
C++

//====-- llvm/Support/TargetFolder.h - Constant folding helper -*- C++ -*-====//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the TargetFolder class, a helper for IRBuilder.
// It provides IRBuilder with a set of methods for creating constants with
// target dependent folding, in addition to the same target-independent
// folding that the ConstantFolder class provides. For general constant
// creation and folding, use ConstantExpr and the routines in
// llvm/Analysis/ConstantFolding.h.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_TARGETFOLDER_H
#define LLVM_SUPPORT_TARGETFOLDER_H
#include "llvm/Constants.h"
#include "llvm/Analysis/ConstantFolding.h"
namespace llvm {
class TargetData;
class LLVMContext;
/// TargetFolder - Create constants with target dependent folding.
class TargetFolder {
const TargetData *TD;
LLVMContext &Context;
/// Fold - Fold the constant using target specific information.
Constant *Fold(Constant *C) const {
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
if (Constant *CF = ConstantFoldConstantExpression(CE, &Context, TD))
return CF;
return C;
}
public:
explicit TargetFolder(const TargetData *TheTD, LLVMContext &C) :
TD(TheTD), Context(C) {}
//===--------------------------------------------------------------------===//
// Binary Operators
//===--------------------------------------------------------------------===//
Constant *CreateAdd(Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExprAdd(LHS, RHS));
}
Constant *CreateFAdd(Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExprFAdd(LHS, RHS));
}
Constant *CreateSub(Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExprSub(LHS, RHS));
}
Constant *CreateFSub(Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExprFSub(LHS, RHS));
}
Constant *CreateMul(Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExprMul(LHS, RHS));
}
Constant *CreateFMul(Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExprFMul(LHS, RHS));
}
Constant *CreateUDiv(Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExprUDiv(LHS, RHS));
}
Constant *CreateSDiv(Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExprSDiv(LHS, RHS));
}
Constant *CreateFDiv(Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExprFDiv(LHS, RHS));
}
Constant *CreateURem(Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExprURem(LHS, RHS));
}
Constant *CreateSRem(Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExprSRem(LHS, RHS));
}
Constant *CreateFRem(Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExprFRem(LHS, RHS));
}
Constant *CreateShl(Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExprShl(LHS, RHS));
}
Constant *CreateLShr(Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExprLShr(LHS, RHS));
}
Constant *CreateAShr(Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExprAShr(LHS, RHS));
}
Constant *CreateAnd(Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExprAnd(LHS, RHS));
}
Constant *CreateOr(Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExprOr(LHS, RHS));
}
Constant *CreateXor(Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExprXor(LHS, RHS));
}
Constant *CreateBinOp(Instruction::BinaryOps Opc,
Constant *LHS, Constant *RHS) const {
return Fold(Context.getConstantExpr(Opc, LHS, RHS));
}
//===--------------------------------------------------------------------===//
// Unary Operators
//===--------------------------------------------------------------------===//
Constant *CreateNeg(Constant *C) const {
return Fold(Context.getConstantExprNeg(C));
}
Constant *CreateFNeg(Constant *C) const {
return Fold(Context.getConstantExprFNeg(C));
}
Constant *CreateNot(Constant *C) const {
return Fold(Context.getConstantExprNot(C));
}
//===--------------------------------------------------------------------===//
// Memory Instructions
//===--------------------------------------------------------------------===//
Constant *CreateGetElementPtr(Constant *C, Constant* const *IdxList,
unsigned NumIdx) const {
return Fold(Context.getConstantExprGetElementPtr(C, IdxList, NumIdx));
}
Constant *CreateGetElementPtr(Constant *C, Value* const *IdxList,
unsigned NumIdx) const {
return Fold(Context.getConstantExprGetElementPtr(C, IdxList, NumIdx));
}
//===--------------------------------------------------------------------===//
// Cast/Conversion Operators
//===--------------------------------------------------------------------===//
Constant *CreateCast(Instruction::CastOps Op, Constant *C,
const Type *DestTy) const {
if (C->getType() == DestTy)
return C; // avoid calling Fold
return Fold(Context.getConstantExprCast(Op, C, DestTy));
}
Constant *CreateIntCast(Constant *C, const Type *DestTy,
bool isSigned) const {
if (C->getType() == DestTy)
return C; // avoid calling Fold
return Fold(Context.getConstantExprIntegerCast(C, DestTy, isSigned));
}
Constant *CreateBitCast(Constant *C, const Type *DestTy) const {
return CreateCast(Instruction::BitCast, C, DestTy);
}
Constant *CreateIntToPtr(Constant *C, const Type *DestTy) const {
return CreateCast(Instruction::IntToPtr, C, DestTy);
}
Constant *CreatePtrToInt(Constant *C, const Type *DestTy) const {
return CreateCast(Instruction::PtrToInt, C, DestTy);
}
Constant *CreateTruncOrBitCast(Constant *C, const Type *DestTy) const {
if (C->getType() == DestTy)
return C; // avoid calling Fold
return Fold(Context.getConstantExprTruncOrBitCast(C, DestTy));
}
//===--------------------------------------------------------------------===//
// Compare Instructions
//===--------------------------------------------------------------------===//
Constant *CreateICmp(CmpInst::Predicate P, Constant *LHS,
Constant *RHS) const {
return Fold(Context.getConstantExprCompare(P, LHS, RHS));
}
Constant *CreateFCmp(CmpInst::Predicate P, Constant *LHS,
Constant *RHS) const {
return Fold(Context.getConstantExprCompare(P, LHS, RHS));
}
//===--------------------------------------------------------------------===//
// Other Instructions
//===--------------------------------------------------------------------===//
Constant *CreateSelect(Constant *C, Constant *True, Constant *False) const {
return Fold(Context.getConstantExprSelect(C, True, False));
}
Constant *CreateExtractElement(Constant *Vec, Constant *Idx) const {
return Fold(Context.getConstantExprExtractElement(Vec, Idx));
}
Constant *CreateInsertElement(Constant *Vec, Constant *NewElt,
Constant *Idx) const {
return Fold(Context.getConstantExprInsertElement(Vec, NewElt, Idx));
}
Constant *CreateShuffleVector(Constant *V1, Constant *V2,
Constant *Mask) const {
return Fold(Context.getConstantExprShuffleVector(V1, V2, Mask));
}
Constant *CreateExtractValue(Constant *Agg, const unsigned *IdxList,
unsigned NumIdx) const {
return Fold(Context.getConstantExprExtractValue(Agg, IdxList, NumIdx));
}
Constant *CreateInsertValue(Constant *Agg, Constant *Val,
const unsigned *IdxList, unsigned NumIdx) const {
return Fold(Context.getConstantExprInsertValue(Agg, Val, IdxList, NumIdx));
}
};
}
#endif