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e2d02349c3
folders and not having it here fails to compile if you actually try to use it. Also, CreatePointerCast was failing to do the part where it does TD-aware constant folding. Granted there is exactly one case where that it will ever do anything, but there's no reason to skip it. For reference, that case is a subtraction between two constant offsets on the same global variable, eg., "&A[123] - &A[4].f". git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164760 91177308-0d34-0410-b5e6-96231b3b80d8
263 lines
10 KiB
C++
263 lines
10 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, in addition to the same target-independent
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// folding that the ConstantFolder class provides. For general constant
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// creation and folding, use ConstantExpr and the routines in
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// 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/InstrTypes.h"
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#include "llvm/ADT/ArrayRef.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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explicit 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,
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bool HasNUW = false, bool HasNSW = false) const {
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return Fold(ConstantExpr::getAdd(LHS, RHS, HasNUW, HasNSW));
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}
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Constant *CreateFAdd(Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::getFAdd(LHS, RHS));
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}
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Constant *CreateSub(Constant *LHS, Constant *RHS,
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bool HasNUW = false, bool HasNSW = false) const {
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return Fold(ConstantExpr::getSub(LHS, RHS, HasNUW, HasNSW));
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}
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Constant *CreateFSub(Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::getFSub(LHS, RHS));
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}
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Constant *CreateMul(Constant *LHS, Constant *RHS,
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bool HasNUW = false, bool HasNSW = false) const {
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return Fold(ConstantExpr::getMul(LHS, RHS, HasNUW, HasNSW));
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}
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Constant *CreateFMul(Constant *LHS, Constant *RHS) const {
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return Fold(ConstantExpr::getFMul(LHS, RHS));
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}
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Constant *CreateUDiv(Constant *LHS, Constant *RHS, bool isExact = false)const{
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return Fold(ConstantExpr::getUDiv(LHS, RHS, isExact));
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}
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Constant *CreateSDiv(Constant *LHS, Constant *RHS, bool isExact = false)const{
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return Fold(ConstantExpr::getSDiv(LHS, RHS, isExact));
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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,
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bool HasNUW = false, bool HasNSW = false) const {
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return Fold(ConstantExpr::getShl(LHS, RHS, HasNUW, HasNSW));
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}
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Constant *CreateLShr(Constant *LHS, Constant *RHS, bool isExact = false)const{
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return Fold(ConstantExpr::getLShr(LHS, RHS, isExact));
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}
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Constant *CreateAShr(Constant *LHS, Constant *RHS, bool isExact = false)const{
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return Fold(ConstantExpr::getAShr(LHS, RHS, isExact));
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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,
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bool HasNUW = false, bool HasNSW = false) const {
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return Fold(ConstantExpr::getNeg(C, HasNUW, HasNSW));
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}
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Constant *CreateFNeg(Constant *C) const {
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return Fold(ConstantExpr::getFNeg(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,
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ArrayRef<Constant *> IdxList) const {
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return Fold(ConstantExpr::getGetElementPtr(C, IdxList));
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}
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Constant *CreateGetElementPtr(Constant *C, Constant *Idx) const {
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// This form of the function only exists to avoid ambiguous overload
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// warnings about whether to convert Idx to ArrayRef<Constant *> or
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// ArrayRef<Value *>.
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return Fold(ConstantExpr::getGetElementPtr(C, Idx));
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}
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Constant *CreateGetElementPtr(Constant *C,
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ArrayRef<Value *> IdxList) const {
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return Fold(ConstantExpr::getGetElementPtr(C, IdxList));
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}
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Constant *CreateInBoundsGetElementPtr(Constant *C,
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ArrayRef<Constant *> IdxList) const {
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return Fold(ConstantExpr::getInBoundsGetElementPtr(C, IdxList));
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}
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Constant *CreateInBoundsGetElementPtr(Constant *C, Constant *Idx) const {
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// This form of the function only exists to avoid ambiguous overload
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// warnings about whether to convert Idx to ArrayRef<Constant *> or
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// ArrayRef<Value *>.
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return Fold(ConstantExpr::getInBoundsGetElementPtr(C, Idx));
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}
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Constant *CreateInBoundsGetElementPtr(Constant *C,
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ArrayRef<Value *> IdxList) const {
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return Fold(ConstantExpr::getInBoundsGetElementPtr(C, IdxList));
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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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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, 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 *CreatePointerCast(Constant *C, 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::getPointerCast(C, DestTy));
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}
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Constant *CreateFPCast(Constant *C, 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::getFPCast(C, DestTy));
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}
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Constant *CreateBitCast(Constant *C, 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, 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, Type *DestTy) const {
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return CreateCast(Instruction::PtrToInt, C, DestTy);
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}
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Constant *CreateZExtOrBitCast(Constant *C, 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::getZExtOrBitCast(C, DestTy));
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}
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Constant *CreateSExtOrBitCast(Constant *C, 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::getSExtOrBitCast(C, DestTy));
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}
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Constant *CreateTruncOrBitCast(Constant *C, 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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//===--------------------------------------------------------------------===//
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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,
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ArrayRef<unsigned> IdxList) const {
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return Fold(ConstantExpr::getExtractValue(Agg, IdxList));
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}
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Constant *CreateInsertValue(Constant *Agg, Constant *Val,
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ArrayRef<unsigned> IdxList) const {
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return Fold(ConstantExpr::getInsertValue(Agg, Val, IdxList));
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}
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};
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}
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#endif
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