forked from OSchip/llvm-project
72 lines
2.4 KiB
C++
72 lines
2.4 KiB
C++
//===- ReplaceConstant.cpp - Replace LLVM constant expression--------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements a utility function for replacing LLVM constant
|
|
// expressions by instructions.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/IR/ReplaceConstant.h"
|
|
#include "llvm/IR/IRBuilder.h"
|
|
#include "llvm/IR/Instructions.h"
|
|
#include "llvm/IR/NoFolder.h"
|
|
|
|
namespace llvm {
|
|
// Replace a constant expression by instructions with equivalent operations at
|
|
// a specified location.
|
|
Instruction *createReplacementInstr(ConstantExpr *CE, Instruction *Instr) {
|
|
IRBuilder<NoFolder> Builder(Instr);
|
|
unsigned OpCode = CE->getOpcode();
|
|
switch (OpCode) {
|
|
case Instruction::GetElementPtr: {
|
|
SmallVector<Value *, 4> CEOpVec(CE->operands());
|
|
ArrayRef<Value *> CEOps(CEOpVec);
|
|
return dyn_cast<Instruction>(
|
|
Builder.CreateInBoundsGEP(cast<GEPOperator>(CE)->getSourceElementType(),
|
|
CEOps[0], CEOps.slice(1)));
|
|
}
|
|
case Instruction::Add:
|
|
case Instruction::Sub:
|
|
case Instruction::Mul:
|
|
case Instruction::UDiv:
|
|
case Instruction::SDiv:
|
|
case Instruction::FDiv:
|
|
case Instruction::URem:
|
|
case Instruction::SRem:
|
|
case Instruction::FRem:
|
|
case Instruction::Shl:
|
|
case Instruction::LShr:
|
|
case Instruction::AShr:
|
|
case Instruction::And:
|
|
case Instruction::Or:
|
|
case Instruction::Xor:
|
|
return dyn_cast<Instruction>(
|
|
Builder.CreateBinOp((Instruction::BinaryOps)OpCode, CE->getOperand(0),
|
|
CE->getOperand(1), CE->getName()));
|
|
case Instruction::Trunc:
|
|
case Instruction::ZExt:
|
|
case Instruction::SExt:
|
|
case Instruction::FPToUI:
|
|
case Instruction::FPToSI:
|
|
case Instruction::UIToFP:
|
|
case Instruction::SIToFP:
|
|
case Instruction::FPTrunc:
|
|
case Instruction::FPExt:
|
|
case Instruction::PtrToInt:
|
|
case Instruction::IntToPtr:
|
|
case Instruction::BitCast:
|
|
case Instruction::AddrSpaceCast:
|
|
return dyn_cast<Instruction>(
|
|
Builder.CreateCast((Instruction::CastOps)OpCode, CE->getOperand(0),
|
|
CE->getType(), CE->getName()));
|
|
default:
|
|
llvm_unreachable("Unhandled constant expression!\n");
|
|
}
|
|
}
|
|
} // namespace llvm
|