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Make it possible to use different constant

Browse Source 
folding policies with IRBuilder.  The default,
provided by ConstantFolder, is to do minimal
folding like now: what ConstantExpr provides.
An alternative is to use TargetFolder, which
uses target information to fold constants more.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54640 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2008-08-11 15:29:30 +00:00
parent 4630e4ddcf
commit 1e7f7865eb
3 changed files with 455 additions and 81 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

175
include/llvm/Support/ConstantFolder.h Normal file
View File

@ -0,0 +1,175 @@
//===-- llvm/Support/ConstantFolder.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 ConstantFolder class, which provides a set of methods
// for creating constants, with minimal folding.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_CONSTANTFOLDER_H
#define LLVM_SUPPORT_CONSTANTFOLDER_H
#include "llvm/Constants.h"
namespace llvm {
/// ConstantFolder - Create constants with minimum, target independent, folding.
class ConstantFolder {
public:
//===--------------------------------------------------------------------===//
// Binary Operators
//===--------------------------------------------------------------------===//
Constant *CreateAdd(Constant *LHS, Constant *RHS) const {
return ConstantExpr::getAdd(LHS, RHS);
}
Constant *CreateSub(Constant *LHS, Constant *RHS) const {
return ConstantExpr::getSub(LHS, RHS);
}
Constant *CreateMul(Constant *LHS, Constant *RHS) const {
return ConstantExpr::getMul(LHS, RHS);
}
Constant *CreateUDiv(Constant *LHS, Constant *RHS) const {
return ConstantExpr::getUDiv(LHS, RHS);
}
Constant *CreateSDiv(Constant *LHS, Constant *RHS) const {
return ConstantExpr::getSDiv(LHS, RHS);
}
Constant *CreateFDiv(Constant *LHS, Constant *RHS) const {
return ConstantExpr::getFDiv(LHS, RHS);
}
Constant *CreateURem(Constant *LHS, Constant *RHS) const {
return ConstantExpr::getURem(LHS, RHS);
}
Constant *CreateSRem(Constant *LHS, Constant *RHS) const {
return ConstantExpr::getSRem(LHS, RHS);
}
Constant *CreateFRem(Constant *LHS, Constant *RHS) const {
return ConstantExpr::getFRem(LHS, RHS);
}
Constant *CreateShl(Constant *LHS, Constant *RHS) const {
return ConstantExpr::getShl(LHS, RHS);
}
Constant *CreateLShr(Constant *LHS, Constant *RHS) const {
return ConstantExpr::getLShr(LHS, RHS);
}
Constant *CreateAShr(Constant *LHS, Constant *RHS) const {
return ConstantExpr::getAShr(LHS, RHS);
}
Constant *CreateAnd(Constant *LHS, Constant *RHS) const {
return ConstantExpr::getAnd(LHS, RHS);
}
Constant *CreateOr(Constant *LHS, Constant *RHS) const {
return ConstantExpr::getOr(LHS, RHS);
}
Constant *CreateXor(Constant *LHS, Constant *RHS) const {
return ConstantExpr::getXor(LHS, RHS);
}
Constant *CreateBinOp(Instruction::BinaryOps Opc,
Constant *LHS, Constant *RHS) const {
return ConstantExpr::get(Opc, LHS, RHS);
}
//===--------------------------------------------------------------------===//
// Unary Operators
//===--------------------------------------------------------------------===//
Constant *CreateNeg(Constant *C) const {
return ConstantExpr::getNeg(C);
}
Constant *CreateNot(Constant *C) const {
return ConstantExpr::getNot(C);
}
//===--------------------------------------------------------------------===//
// Memory Instructions
//===--------------------------------------------------------------------===//
Constant *CreateGetElementPtr(Constant *C, Constant* const *IdxList,
unsigned NumIdx) const {
return ConstantExpr::getGetElementPtr(C, IdxList, NumIdx);
}
Constant *CreateGetElementPtr(Constant *C, Value* const *IdxList,
unsigned NumIdx) const {
return ConstantExpr::getGetElementPtr(C, IdxList, NumIdx);
}
//===--------------------------------------------------------------------===//
// Cast/Conversion Operators
//===--------------------------------------------------------------------===//
Constant *CreateCast(Instruction::CastOps Op, Constant *C,
const Type *DestTy) const {
return ConstantExpr::getCast(Op, C, DestTy);
}
Constant *CreateIntCast(Constant *C, const Type *DestTy,
bool isSigned) const {
return ConstantExpr::getIntegerCast(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 {
return ConstantExpr::getTruncOrBitCast(C, DestTy);
}
//===--------------------------------------------------------------------===//
// Compare Instructions
//===--------------------------------------------------------------------===//
Constant *CreateCompare(CmpInst::Predicate P, Constant *LHS,
Constant *RHS) const {
return ConstantExpr::getCompare(P, LHS, RHS);
}
//===--------------------------------------------------------------------===//
// Other Instructions
//===--------------------------------------------------------------------===//
Constant *CreateSelect(Constant *C, Constant *True, Constant *False) const {
return ConstantExpr::getSelect(C, True, False);
}
Constant *CreateExtractElement(Constant *Vec, Constant *Idx) const {
return ConstantExpr::getExtractElement(Vec, Idx);
}
Constant *CreateInsertElement(Constant *Vec, Constant *NewElt,
Constant *Idx) const {
return ConstantExpr::getInsertElement(Vec, NewElt, Idx);
}
Constant *CreateShuffleVector(Constant *V1, Constant *V2,
Constant *Mask) const {
return ConstantExpr::getShuffleVector(V1, V2, Mask);
}
Constant *CreateExtractValue(Constant *Agg, const unsigned *IdxList,
unsigned NumIdx) const {
return ConstantExpr::getExtractValue(Agg, IdxList, NumIdx);
}
Constant *CreateInsertValue(Constant *Agg, Constant *Val,
const unsigned *IdxList, unsigned NumIdx) const {
return ConstantExpr::getInsertValue(Agg, Val, IdxList, NumIdx);
}
};
}
#endif

168
include/llvm/Support/IRBuilder.h
View File

@ -16,15 +16,16 @@
#define LLVM_SUPPORT_IRBUILDER_H
#include "llvm/BasicBlock.h"
#include "llvm/Instructions.h"
#include "llvm/Constants.h"
#include "llvm/Instructions.h"
#include "llvm/GlobalVariable.h"
#include "llvm/Function.h"
#include "llvm/Support/ConstantFolder.h"
namespace llvm {
/// IRBuilder - This provides a uniform API for creating instructions and
/// inserting them into a basic block: either at the end of a BasicBlock, or
/// inserting them into a basic block: either at the end of a BasicBlock, or
/// at a specific iterator location in a block.
///
/// Note that the builder does not expose the full generality of LLVM
@ -33,17 +34,23 @@ namespace llvm {
/// supports nul-terminated C strings. For fully generic names, use
/// I->setName(). For access to extra instruction properties, use the mutators
/// (e.g. setVolatile) on the instructions after they have been created.
/// The template argument handles whether or not to preserve names in the final
/// instruction output. This defaults to on.
template <bool preserveNames=true> class IRBuilder {
/// The first template argument handles whether or not to preserve names in the
/// final instruction output. This defaults to on. The second template argument
/// specifies a class to use for creating constants. This defaults to creating
/// minimally folded constants.
template <bool preserveNames=true, typename T = ConstantFolder> class IRBuilder{
BasicBlock *BB;
BasicBlock::iterator InsertPt;
T Folder;
public:
IRBuilder() { ClearInsertionPoint(); }
explicit IRBuilder(BasicBlock *TheBB) { SetInsertPoint(TheBB); }
IRBuilder(BasicBlock *TheBB, BasicBlock::iterator IP) {
SetInsertPoint(TheBB, IP);
}
IRBuilder(const T& F = T()) : Folder(F) { ClearInsertionPoint(); }
explicit IRBuilder(BasicBlock *TheBB, const T& F = T())
: Folder(F) { SetInsertPoint(TheBB); }
IRBuilder(BasicBlock *TheBB, BasicBlock::iterator IP, const T& F = T())
: Folder(F) { SetInsertPoint(TheBB, IP); }
/// getFolder - Get the constant folder being used.
const T& getFolder() { return Folder; }
//===--------------------------------------------------------------------===//
// Builder configuration methods
@ -54,30 +61,30 @@ public:
void ClearInsertionPoint() {
BB = 0;
}
BasicBlock *GetInsertBlock() const { return BB; }
/// SetInsertPoint - This specifies that created instructions should be
/// appended to the end of the specified block.
void SetInsertPoint(BasicBlock *TheBB) {
BB = TheBB;
InsertPt = BB->end();
}
/// SetInsertPoint - This specifies that created instructions should be
/// inserted at the specified point.
void SetInsertPoint(BasicBlock *TheBB, BasicBlock::iterator IP) {
BB = TheBB;
InsertPt = IP;
}
/// Insert - Insert and return the specified instruction.
template<typename InstTy>
InstTy *Insert(InstTy *I, const char *Name = "") const {
InsertHelper(I, Name);
return I;
}
/// InsertHelper - Insert the specified instruction at the specified insertion
/// point. This is split out of Insert so that it isn't duplicated for every
/// template instantiation.
@ -86,7 +93,7 @@ public:
if (preserveNames && Name[0])
I->setName(Name);
}
//===--------------------------------------------------------------------===//
// Instruction creation methods: Terminators
//===--------------------------------------------------------------------===//
@ -96,8 +103,8 @@ public:
return Insert(ReturnInst::Create());
}
/// @verbatim
/// CreateRet - Create a 'ret <val>' instruction.
/// @verbatim
/// CreateRet - Create a 'ret <val>' instruction.
/// @endverbatim
ReturnInst *CreateRet(Value *V) {
return Insert(ReturnInst::Create(V));
@ -117,7 +124,7 @@ public:
V = CreateInsertValue(V, retVals[i], i, "mrv");
return Insert(ReturnInst::Create(V));
}
/// CreateBr - Create an unconditional 'br label X' instruction.
BranchInst *CreateBr(BasicBlock *Dest) {
return Insert(BranchInst::Create(Dest));
@ -128,23 +135,23 @@ public:
BranchInst *CreateCondBr(Value *Cond, BasicBlock *True, BasicBlock *False) {
return Insert(BranchInst::Create(True, False, Cond));
}
/// CreateSwitch - Create a switch instruction with the specified value,
/// default dest, and with a hint for the number of cases that will be added
/// (for efficient allocation).
SwitchInst *CreateSwitch(Value *V, BasicBlock *Dest, unsigned NumCases = 10) {
return Insert(SwitchInst::Create(V, Dest, NumCases));
}
/// CreateInvoke - Create an invoke instruction.
template<typename InputIterator>
InvokeInst *CreateInvoke(Value *Callee, BasicBlock *NormalDest,
BasicBlock *UnwindDest, InputIterator ArgBegin,
InvokeInst *CreateInvoke(Value *Callee, BasicBlock *NormalDest,
BasicBlock *UnwindDest, InputIterator ArgBegin,
InputIterator ArgEnd, const char *Name = "") {
return Insert(InvokeInst::Create(Callee, NormalDest, UnwindDest,
ArgBegin, ArgEnd), Name);
}
UnwindInst *CreateUnwind() {
return Insert(new UnwindInst());
}
@ -152,7 +159,7 @@ public:
UnreachableInst *CreateUnreachable() {
return Insert(new UnreachableInst());
}
//===--------------------------------------------------------------------===//
// Instruction creation methods: Binary Operators
//===--------------------------------------------------------------------===//
@ -160,91 +167,91 @@ public:
Value *CreateAdd(Value *LHS, Value *RHS, const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getAdd(LC, RC);
return Folder.CreateAdd(LC, RC);
return Insert(BinaryOperator::CreateAdd(LHS, RHS), Name);
}
Value *CreateSub(Value *LHS, Value *RHS, const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getSub(LC, RC);
return Folder.CreateSub(LC, RC);
return Insert(BinaryOperator::CreateSub(LHS, RHS), Name);
}
Value *CreateMul(Value *LHS, Value *RHS, const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getMul(LC, RC);
return Folder.CreateMul(LC, RC);
return Insert(BinaryOperator::CreateMul(LHS, RHS), Name);
}
Value *CreateUDiv(Value *LHS, Value *RHS, const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getUDiv(LC, RC);
return Folder.CreateUDiv(LC, RC);
return Insert(BinaryOperator::CreateUDiv(LHS, RHS), Name);
}
Value *CreateSDiv(Value *LHS, Value *RHS, const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getSDiv(LC, RC);
return Folder.CreateSDiv(LC, RC);
return Insert(BinaryOperator::CreateSDiv(LHS, RHS), Name);
}
Value *CreateFDiv(Value *LHS, Value *RHS, const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getFDiv(LC, RC);
return Folder.CreateFDiv(LC, RC);
return Insert(BinaryOperator::CreateFDiv(LHS, RHS), Name);
}
Value *CreateURem(Value *LHS, Value *RHS, const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getURem(LC, RC);
return Folder.CreateURem(LC, RC);
return Insert(BinaryOperator::CreateURem(LHS, RHS), Name);
}
Value *CreateSRem(Value *LHS, Value *RHS, const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getSRem(LC, RC);
return Folder.CreateSRem(LC, RC);
return Insert(BinaryOperator::CreateSRem(LHS, RHS), Name);
}
Value *CreateFRem(Value *LHS, Value *RHS, const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getFRem(LC, RC);
return Folder.CreateFRem(LC, RC);
return Insert(BinaryOperator::CreateFRem(LHS, RHS), Name);
}
Value *CreateShl(Value *LHS, Value *RHS, const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getShl(LC, RC);
return Folder.CreateShl(LC, RC);
return Insert(BinaryOperator::CreateShl(LHS, RHS), Name);
}
Value *CreateLShr(Value *LHS, Value *RHS, const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getLShr(LC, RC);
return Folder.CreateLShr(LC, RC);
return Insert(BinaryOperator::CreateLShr(LHS, RHS), Name);
}
Value *CreateAShr(Value *LHS, Value *RHS, const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getAShr(LC, RC);
return Folder.CreateAShr(LC, RC);
return Insert(BinaryOperator::CreateAShr(LHS, RHS), Name);
}
Value *CreateAnd(Value *LHS, Value *RHS, const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getAnd(LC, RC);
return Folder.CreateAnd(LC, RC);
return Insert(BinaryOperator::CreateAnd(LHS, RHS), Name);
}
Value *CreateOr(Value *LHS, Value *RHS, const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getOr(LC, RC);
return Folder.CreateOr(LC, RC);
return Insert(BinaryOperator::CreateOr(LHS, RHS), Name);
}
Value *CreateXor(Value *LHS, Value *RHS, const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getXor(LC, RC);
return Folder.CreateXor(LC, RC);
return Insert(BinaryOperator::CreateXor(LHS, RHS), Name);
}
@ -252,25 +259,25 @@ public:
Value *LHS, Value *RHS, const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::get(Opc, LC, RC);
return Folder.CreateBinOp(Opc, LC, RC);
return Insert(BinaryOperator::Create(Opc, LHS, RHS), Name);
}
Value *CreateNeg(Value *V, const char *Name = "") {
if (Constant *VC = dyn_cast<Constant>(V))
return ConstantExpr::getNeg(VC);
return Folder.CreateNeg(VC);
return Insert(BinaryOperator::CreateNeg(V), Name);
}
Value *CreateNot(Value *V, const char *Name = "") {
if (Constant *VC = dyn_cast<Constant>(V))
return ConstantExpr::getNot(VC);
return Folder.CreateNot(VC);
return Insert(BinaryOperator::CreateNot(V), Name);
}
//===--------------------------------------------------------------------===//
// Instruction creation methods: Memory Instructions
//===--------------------------------------------------------------------===//
MallocInst *CreateMalloc(const Type *Ty, Value *ArraySize = 0,
const char *Name = "") {
return Insert(new MallocInst(Ty, ArraySize), Name);
@ -292,9 +299,9 @@ public:
return Insert(new StoreInst(Val, Ptr, isVolatile));
}
template<typename InputIterator>
Value *CreateGEP(Value *Ptr, InputIterator IdxBegin,
Value *CreateGEP(Value *Ptr, InputIterator IdxBegin,
InputIterator IdxEnd, const char *Name = "") {
if (Constant *PC = dyn_cast<Constant>(Ptr)) {
// Every index must be constant.
InputIterator i;
@ -303,15 +310,14 @@ public:
break;
}
if (i == IdxEnd)
return ConstantExpr::getGetElementPtr(PC, &IdxBegin[0],
IdxEnd - IdxBegin);
}
return Folder.CreateGetElementPtr(PC, &IdxBegin[0], IdxEnd - IdxBegin);
}
return Insert(GetElementPtrInst::Create(Ptr, IdxBegin, IdxEnd), Name);
}
Value *CreateGEP(Value *Ptr, Value *Idx, const char *Name = "") {
if (Constant *PC = dyn_cast<Constant>(Ptr))
if (Constant *IC = dyn_cast<Constant>(Idx))
return ConstantExpr::getGetElementPtr(PC, &IC, 1);
return Folder.CreateGetElementPtr(PC, &IC, 1);
return Insert(GetElementPtrInst::Create(Ptr, Idx), Name);
}
Value *CreateStructGEP(Value *Ptr, unsigned Idx, const char *Name = "") {
@ -319,16 +325,16 @@ public:
ConstantInt::get(llvm::Type::Int32Ty, 0),
ConstantInt::get(llvm::Type::Int32Ty, Idx)
};
if (Constant *PC = dyn_cast<Constant>(Ptr))
return ConstantExpr::getGetElementPtr(PC, Idxs, 2);
return Folder.CreateGetElementPtr(PC, Idxs, 2);
return Insert(GetElementPtrInst::Create(Ptr, Idxs, Idxs+2), Name);
}
Value *CreateGlobalString(const char *Str = "", const char *Name = "") {
Constant *StrConstant = ConstantArray::get(Str, true);
GlobalVariable *gv = new llvm::GlobalVariable(StrConstant->getType(),
true,
true,
GlobalValue::InternalLinkage,
StrConstant,
"",
@ -341,12 +347,12 @@ public:
Value *gv = CreateGlobalString(Str, Name);
Value *zero = llvm::ConstantInt::get(llvm::Type::Int32Ty, 0);
Value *Args[] = { zero, zero };
return CreateGEP(gv, Args, Args+2, Name);
return CreateGEP(gv, Args, Args+2, Name);
}
//===--------------------------------------------------------------------===//
// Instruction creation methods: Cast/Conversion Operators
//===--------------------------------------------------------------------===//
Value *CreateTrunc(Value *V, const Type *DestTy, const char *Name = "") {
return CreateCast(Instruction::Trunc, V, DestTy, Name);
}
@ -393,7 +399,7 @@ public:
if (V->getType() == DestTy)
return V;
if (Constant *VC = dyn_cast<Constant>(V))
return ConstantExpr::getCast(Op, VC, DestTy);
return Folder.CreateCast(Op, VC, DestTy);
return Insert(CastInst::Create(Op, V, DestTy), Name);
}
Value *CreateIntCast(Value *V, const Type *DestTy, bool isSigned,
@ -401,14 +407,14 @@ public:
if (V->getType() == DestTy)
return V;
if (Constant *VC = dyn_cast<Constant>(V))
return ConstantExpr::getIntegerCast(VC, DestTy, isSigned);
return Folder.CreateIntCast(VC, DestTy, isSigned);
return Insert(CastInst::CreateIntegerCast(V, DestTy, isSigned), Name);
}
//===--------------------------------------------------------------------===//
// Instruction creation methods: Compare Instructions
//===--------------------------------------------------------------------===//
Value *CreateICmpEQ(Value *LHS, Value *RHS, const char *Name = "") {
return CreateICmp(ICmpInst::ICMP_EQ, LHS, RHS, Name);
}
@ -439,7 +445,7 @@ public:
Value *CreateICmpSLE(Value *LHS, Value *RHS, const char *Name = "") {
return CreateICmp(ICmpInst::ICMP_SLE, LHS, RHS, Name);
}
Value *CreateFCmpOEQ(Value *LHS, Value *RHS, const char *Name = "") {
return CreateFCmp(FCmpInst::FCMP_OEQ, LHS, RHS, Name);
}
@ -483,33 +489,33 @@ public:
return CreateFCmp(FCmpInst::FCMP_UNE, LHS, RHS, Name);
}
Value *CreateICmp(CmpInst::Predicate P, Value *LHS, Value *RHS,
Value *CreateICmp(CmpInst::Predicate P, Value *LHS, Value *RHS,
const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getCompare(P, LC, RC);
return Folder.CreateCompare(P, LC, RC);
return Insert(new ICmpInst(P, LHS, RHS), Name);
}
Value *CreateFCmp(CmpInst::Predicate P, Value *LHS, Value *RHS,
Value *CreateFCmp(CmpInst::Predicate P, Value *LHS, Value *RHS,
const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getCompare(P, LC, RC);
return Folder.CreateCompare(P, LC, RC);
return Insert(new FCmpInst(P, LHS, RHS), Name);
}
Value *CreateVICmp(CmpInst::Predicate P, Value *LHS, Value *RHS,
Value *CreateVICmp(CmpInst::Predicate P, Value *LHS, Value *RHS,
const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getCompare(P, LC, RC);
return Folder.CreateCompare(P, LC, RC);
return Insert(new VICmpInst(P, LHS, RHS), Name);
}
Value *CreateVFCmp(CmpInst::Predicate P, Value *LHS, Value *RHS,
Value *CreateVFCmp(CmpInst::Predicate P, Value *LHS, Value *RHS,
const char *Name = "") {
if (Constant *LC = dyn_cast<Constant>(LHS))
if (Constant *RC = dyn_cast<Constant>(RHS))
return ConstantExpr::getCompare(P, LC, RC);
return Folder.CreateCompare(P, LC, RC);
return Insert(new VFCmpInst(P, LHS, RHS), Name);
}
@ -542,9 +548,9 @@ public:
Value *Args[] = { Arg1, Arg2, Arg3, Arg4 };
return Insert(CallInst::Create(Callee, Args, Args+4), Name);
}
template<typename InputIterator>
CallInst *CreateCall(Value *Callee, InputIterator ArgBegin,
CallInst *CreateCall(Value *Callee, InputIterator ArgBegin,
InputIterator ArgEnd, const char *Name = "") {
return Insert(CallInst::Create(Callee, ArgBegin, ArgEnd), Name);
}
@ -554,7 +560,7 @@ public:
if (Constant *CC = dyn_cast<Constant>(C))
if (Constant *TC = dyn_cast<Constant>(True))
if (Constant *FC = dyn_cast<Constant>(False))
return ConstantExpr::getSelect(CC, TC, FC);
return Folder.CreateSelect(CC, TC, FC);
return Insert(SelectInst::Create(C, True, False), Name);
}
@ -566,7 +572,7 @@ public:
const char *Name = "") {
if (Constant *VC = dyn_cast<Constant>(Vec))
if (Constant *IC = dyn_cast<Constant>(Idx))
return ConstantExpr::getExtractElement(VC, IC);
return Folder.CreateExtractElement(VC, IC);
return Insert(new ExtractElementInst(Vec, Idx), Name);
}
@ -575,7 +581,7 @@ public:
if (Constant *VC = dyn_cast<Constant>(Vec))
if (Constant *NC = dyn_cast<Constant>(NewElt))
if (Constant *IC = dyn_cast<Constant>(Idx))
return ConstantExpr::getInsertElement(VC, NC, IC);
return Folder.CreateInsertElement(VC, NC, IC);
return Insert(InsertElementInst::Create(Vec, NewElt, Idx), Name);
}
@ -584,14 +590,14 @@ public:
if (Constant *V1C = dyn_cast<Constant>(V1))
if (Constant *V2C = dyn_cast<Constant>(V2))
if (Constant *MC = dyn_cast<Constant>(Mask))
return ConstantExpr::getShuffleVector(V1C, V2C, MC);
return Folder.CreateShuffleVector(V1C, V2C, MC);
return Insert(new ShuffleVectorInst(V1, V2, Mask), Name);
}
Value *CreateExtractValue(Value *Agg, unsigned Idx,
const char *Name = "") {
if (Constant *AggC = dyn_cast<Constant>(Agg))
return ConstantExpr::getExtractValue(AggC, &Idx, 1);
return Folder.CreateExtractValue(AggC, &Idx, 1);
return Insert(ExtractValueInst::Create(Agg, Idx), Name);
}
@ -601,7 +607,7 @@ public:
InputIterator IdxEnd,
const char *Name = "") {
if (Constant *AggC = dyn_cast<Constant>(Agg))
return ConstantExpr::getExtractValue(AggC, IdxBegin, IdxEnd - IdxBegin);
return Folder.CreateExtractValue(AggC, IdxBegin, IdxEnd - IdxBegin);
return Insert(ExtractValueInst::Create(Agg, IdxBegin, IdxEnd), Name);
}
@ -609,7 +615,7 @@ public:
const char *Name = "") {
if (Constant *AggC = dyn_cast<Constant>(Agg))
if (Constant *ValC = dyn_cast<Constant>(Val))
return ConstantExpr::getInsertValue(AggC, ValC, &Idx, 1);
return Folder.CreateInsertValue(AggC, ValC, &Idx, 1);
return Insert(InsertValueInst::Create(Agg, Val, Idx), Name);
}
@ -620,12 +626,12 @@ public:
const char *Name = "") {
if (Constant *AggC = dyn_cast<Constant>(Agg))
if (Constant *ValC = dyn_cast<Constant>(Val))
return ConstantExpr::getInsertValue(AggC, ValC,
return Folder.CreateInsertValue(AggC, ValC,
IdxBegin, IdxEnd - IdxBegin);
return Insert(InsertValueInst::Create(Agg, Val, IdxBegin, IdxEnd), Name);
}
};
}
#endif

193
include/llvm/Support/TargetFolder.h Normal file
View File

@ -0,0 +1,193 @@
//====-- 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, which provides a set of methods
// for creating constants, with target dependent folding.
//
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_TARGETFOLDER_H
#define LLVM_SUPPORT_TARGETFOLDER_H
#include "llvm/Constants.h"
#include "llvm/Analysis/ConstantFolding.h"
namespace llvm {
class TargetData;
/// TargetFolder - Create constants with target dependent folding.
class TargetFolder {
const TargetData &TD;
/// 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, &TD))
return CF;
return C;
}
public:
TargetFolder(const TargetData &TheTD) : TD(TheTD) {}
//===--------------------------------------------------------------------===//
// Binary Operators
//===--------------------------------------------------------------------===//
Constant *CreateAdd(Constant *LHS, Constant *RHS) const {
return Fold(ConstantExpr::getAdd(LHS, RHS));
}
Constant *CreateSub(Constant *LHS, Constant *RHS) const {
return Fold(ConstantExpr::getSub(LHS, RHS));
}
Constant *CreateMul(Constant *LHS, Constant *RHS) const {
return Fold(ConstantExpr::getMul(LHS, RHS));
}
Constant *CreateUDiv(Constant *LHS, Constant *RHS) const {
return Fold(ConstantExpr::getUDiv(LHS, RHS));
}
Constant *CreateSDiv(Constant *LHS, Constant *RHS) const {
return Fold(ConstantExpr::getSDiv(LHS, RHS));
}
Constant *CreateFDiv(Constant *LHS, Constant *RHS) const {
return Fold(ConstantExpr::getFDiv(LHS, RHS));
}
Constant *CreateURem(Constant *LHS, Constant *RHS) const {
return Fold(ConstantExpr::getURem(LHS, RHS));
}
Constant *CreateSRem(Constant *LHS, Constant *RHS) const {
return Fold(ConstantExpr::getSRem(LHS, RHS));
}
Constant *CreateFRem(Constant *LHS, Constant *RHS) const {
return Fold(ConstantExpr::getFRem(LHS, RHS));
}
Constant *CreateShl(Constant *LHS, Constant *RHS) const {
return Fold(ConstantExpr::getShl(LHS, RHS));
}
Constant *CreateLShr(Constant *LHS, Constant *RHS) const {
return Fold(ConstantExpr::getLShr(LHS, RHS));
}
Constant *CreateAShr(Constant *LHS, Constant *RHS) const {
return Fold(ConstantExpr::getAShr(LHS, RHS));
}
Constant *CreateAnd(Constant *LHS, Constant *RHS) const {
return Fold(ConstantExpr::getAnd(LHS, RHS));
}
Constant *CreateOr(Constant *LHS, Constant *RHS) const {
return Fold(ConstantExpr::getOr(LHS, RHS));
}
Constant *CreateXor(Constant *LHS, Constant *RHS) const {
return Fold(ConstantExpr::getXor(LHS, RHS));
}
Constant *CreateBinOp(Instruction::BinaryOps Opc,
Constant *LHS, Constant *RHS) const {
return Fold(ConstantExpr::get(Opc, LHS, RHS));
}
//===--------------------------------------------------------------------===//
// Unary Operators
//===--------------------------------------------------------------------===//
Constant *CreateNeg(Constant *C) const {
return Fold(ConstantExpr::getNeg(C));
}
Constant *CreateNot(Constant *C) const {
return Fold(ConstantExpr::getNot(C));
}
//===--------------------------------------------------------------------===//
// Memory Instructions
//===--------------------------------------------------------------------===//
Constant *CreateGetElementPtr(Constant *C, Constant* const *IdxList,
unsigned NumIdx) const {
return Fold(ConstantExpr::getGetElementPtr(C, IdxList, NumIdx));
}
Constant *CreateGetElementPtr(Constant *C, Value* const *IdxList,
unsigned NumIdx) const {
return Fold(ConstantExpr::getGetElementPtr(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(ConstantExpr::getCast(Op, C, DestTy));
}
Constant *CreateIntCast(Constant *C, const Type *DestTy,
bool isSigned) const {
if (C->getType() == DestTy)
return C; // avoid calling Fold
return Fold(ConstantExpr::getIntegerCast(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(ConstantExpr::getTruncOrBitCast(C, DestTy));
}
//===--------------------------------------------------------------------===//
// Compare Instructions
//===--------------------------------------------------------------------===//
Constant *CreateCompare(CmpInst::Predicate P, Constant *LHS, Constant *RHS) const {
return Fold(ConstantExpr::getCompare(P, LHS, RHS));
}
//===--------------------------------------------------------------------===//
// Other Instructions
//===--------------------------------------------------------------------===//
Constant *CreateSelect(Constant *C, Constant *True, Constant *False) const {
return Fold(ConstantExpr::getSelect(C, True, False));
}
Constant *CreateExtractElement(Constant *Vec, Constant *Idx) const {
return Fold(ConstantExpr::getExtractElement(Vec, Idx));
}
Constant *CreateInsertElement(Constant *Vec, Constant *NewElt, Constant *Idx)const {
return Fold(ConstantExpr::getInsertElement(Vec, NewElt, Idx));
}
Constant *CreateShuffleVector(Constant *V1, Constant *V2, Constant *Mask) const {
return Fold(ConstantExpr::getShuffleVector(V1, V2, Mask));
}
Constant *CreateExtractValue(Constant *Agg, const unsigned *IdxList,
unsigned NumIdx) const {
return Fold(ConstantExpr::getExtractValue(Agg, IdxList, NumIdx));
}
Constant *CreateInsertValue(Constant *Agg, Constant *Val,
const unsigned *IdxList, unsigned NumIdx) const {
return Fold(ConstantExpr::getInsertValue(Agg, Val, IdxList, NumIdx));
}
};
}
#endif