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This may be used as the second IRBuilder template parameter, the idea being that people learning LLVM may find it helpful (several people asked on IRC if it was possible to turn off constant folding because it made it hard for them to see what was going on). Compiles, but otherwise completely untested. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54698 91177308-0d34-0410-b5e6-96231b3b80d8
210 lines
7.6 KiB
C++
210 lines
7.6 KiB
C++
//====-- llvm/Support/TargetFolder.h - Constant folding helper -*- 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 defines the TargetFolder class, a helper for IRBuilder.
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// It provides IRBuilder with a set of methods for creating constants with
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// target dependent folding. For general constant creation and folding,
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// use ConstantExpr and the routines in llvm/Analysis/ConstantFolding.h.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_TARGETFOLDER_H
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#define LLVM_SUPPORT_TARGETFOLDER_H
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#include "llvm/Constants.h"
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#include "llvm/Analysis/ConstantFolding.h"
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namespace llvm {
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class TargetData;
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/// TargetFolder - Create constants with target dependent folding.
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class TargetFolder {
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const TargetData &TD;
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/// Fold - Fold the constant using target specific information.
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Constant *Fold(Constant *C) const {
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if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C))
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if (Constant *CF = ConstantFoldConstantExpression(CE, &TD))
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return CF;
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return C;
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}
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public:
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TargetFolder(const TargetData &TheTD) : TD(TheTD) {}
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//===--------------------------------------------------------------------===//
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// Binary Operators
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//===--------------------------------------------------------------------===//
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Constant *CreateAdd(Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::getAdd(LHS, RHS));
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}
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Constant *CreateSub(Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::getSub(LHS, RHS));
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}
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Constant *CreateMul(Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::getMul(LHS, RHS));
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}
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Constant *CreateUDiv(Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::getUDiv(LHS, RHS));
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}
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Constant *CreateSDiv(Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::getSDiv(LHS, RHS));
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}
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Constant *CreateFDiv(Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::getFDiv(LHS, RHS));
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}
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Constant *CreateURem(Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::getURem(LHS, RHS));
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}
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Constant *CreateSRem(Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::getSRem(LHS, RHS));
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}
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Constant *CreateFRem(Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::getFRem(LHS, RHS));
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}
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Constant *CreateShl(Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::getShl(LHS, RHS));
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}
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Constant *CreateLShr(Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::getLShr(LHS, RHS));
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}
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Constant *CreateAShr(Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::getAShr(LHS, RHS));
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}
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Constant *CreateAnd(Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::getAnd(LHS, RHS));
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}
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Constant *CreateOr(Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::getOr(LHS, RHS));
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}
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Constant *CreateXor(Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::getXor(LHS, RHS));
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}
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Constant *CreateBinOp(Instruction::BinaryOps Opc,
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Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::get(Opc, LHS, RHS));
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}
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//===--------------------------------------------------------------------===//
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// Unary Operators
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//===--------------------------------------------------------------------===//
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Constant *CreateNeg(Constant *C) const {
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return Fold(ConstantExpr::getNeg(C));
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}
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Constant *CreateNot(Constant *C) const {
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return Fold(ConstantExpr::getNot(C));
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}
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//===--------------------------------------------------------------------===//
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// Memory Instructions
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//===--------------------------------------------------------------------===//
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Constant *CreateGetElementPtr(Constant *C, Constant* const *IdxList,
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unsigned NumIdx) const {
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return Fold(ConstantExpr::getGetElementPtr(C, IdxList, NumIdx));
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}
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Constant *CreateGetElementPtr(Constant *C, Value* const *IdxList,
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unsigned NumIdx) const {
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return Fold(ConstantExpr::getGetElementPtr(C, IdxList, NumIdx));
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}
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//===--------------------------------------------------------------------===//
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// Cast/Conversion Operators
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//===--------------------------------------------------------------------===//
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Constant *CreateCast(Instruction::CastOps Op, Constant *C,
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const Type *DestTy) const {
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if (C->getType() == DestTy)
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return C; // avoid calling Fold
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return Fold(ConstantExpr::getCast(Op, C, DestTy));
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}
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Constant *CreateIntCast(Constant *C, const Type *DestTy,
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bool isSigned) const {
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if (C->getType() == DestTy)
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return C; // avoid calling Fold
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return Fold(ConstantExpr::getIntegerCast(C, DestTy, isSigned));
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}
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Constant *CreateBitCast(Constant *C, const Type *DestTy) const {
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return CreateCast(Instruction::BitCast, C, DestTy);
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}
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Constant *CreateIntToPtr(Constant *C, const Type *DestTy) const {
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return CreateCast(Instruction::IntToPtr, C, DestTy);
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}
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Constant *CreatePtrToInt(Constant *C, const Type *DestTy) const {
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return CreateCast(Instruction::PtrToInt, C, DestTy);
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}
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Constant *CreateTruncOrBitCast(Constant *C, const Type *DestTy) const {
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if (C->getType() == DestTy)
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return C; // avoid calling Fold
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return Fold(ConstantExpr::getTruncOrBitCast(C, DestTy));
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}
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//===--------------------------------------------------------------------===//
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// Compare Instructions
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//===--------------------------------------------------------------------===//
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Constant *CreateICmp(CmpInst::Predicate P, Constant *LHS,
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Constant *RHS) const {
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return Fold(ConstantExpr::getCompare(P, LHS, RHS));
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}
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Constant *CreateFCmp(CmpInst::Predicate P, Constant *LHS,
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Constant *RHS) const {
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return Fold(ConstantExpr::getCompare(P, LHS, RHS));
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}
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Constant *CreateVICmp(CmpInst::Predicate P, Constant *LHS,
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Constant *RHS) const {
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return Fold(ConstantExpr::getCompare(P, LHS, RHS));
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}
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Constant *CreateVFCmp(CmpInst::Predicate P, Constant *LHS,
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Constant *RHS) const {
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return Fold(ConstantExpr::getCompare(P, LHS, RHS));
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}
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//===--------------------------------------------------------------------===//
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// Other Instructions
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//===--------------------------------------------------------------------===//
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Constant *CreateSelect(Constant *C, Constant *True, Constant *False) const {
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return Fold(ConstantExpr::getSelect(C, True, False));
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}
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Constant *CreateExtractElement(Constant *Vec, Constant *Idx) const {
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return Fold(ConstantExpr::getExtractElement(Vec, Idx));
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}
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Constant *CreateInsertElement(Constant *Vec, Constant *NewElt,
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Constant *Idx) const {
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return Fold(ConstantExpr::getInsertElement(Vec, NewElt, Idx));
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}
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Constant *CreateShuffleVector(Constant *V1, Constant *V2,
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Constant *Mask) const {
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return Fold(ConstantExpr::getShuffleVector(V1, V2, Mask));
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}
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Constant *CreateExtractValue(Constant *Agg, const unsigned *IdxList,
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unsigned NumIdx) const {
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return Fold(ConstantExpr::getExtractValue(Agg, IdxList, NumIdx));
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}
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Constant *CreateInsertValue(Constant *Agg, Constant *Val,
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const unsigned *IdxList, unsigned NumIdx) const {
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return Fold(ConstantExpr::getInsertValue(Agg, Val, IdxList, NumIdx));
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}
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};
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}
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#endif
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