64 lines
2 KiB
C++
64 lines
2 KiB
C++
//===------------------- X86CustomBehaviour.cpp -----------------*-C++ -* -===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
/// \file
|
|
///
|
|
/// This file implements methods from the X86CustomBehaviour class.
|
|
///
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "X86CustomBehaviour.h"
|
|
#include "TargetInfo/X86TargetInfo.h"
|
|
#include "MCTargetDesc/X86BaseInfo.h"
|
|
#include "llvm/MC/TargetRegistry.h"
|
|
#include "llvm/Support/WithColor.h"
|
|
|
|
namespace llvm {
|
|
namespace mca {
|
|
|
|
void X86InstrPostProcess::setMemBarriers(std::unique_ptr<Instruction> &Inst,
|
|
const MCInst &MCI) {
|
|
switch (MCI.getOpcode()) {
|
|
case X86::MFENCE:
|
|
Inst->setLoadBarrier(true);
|
|
Inst->setStoreBarrier(true);
|
|
break;
|
|
case X86::LFENCE:
|
|
Inst->setLoadBarrier(true);
|
|
break;
|
|
case X86::SFENCE:
|
|
Inst->setStoreBarrier(true);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void X86InstrPostProcess::postProcessInstruction(
|
|
std::unique_ptr<Instruction> &Inst, const MCInst &MCI) {
|
|
// Currently, we only modify certain instructions' IsALoadBarrier and
|
|
// IsAStoreBarrier flags.
|
|
setMemBarriers(Inst, MCI);
|
|
}
|
|
|
|
} // namespace mca
|
|
} // namespace llvm
|
|
|
|
using namespace llvm;
|
|
using namespace mca;
|
|
|
|
static InstrPostProcess *createX86InstrPostProcess(const MCSubtargetInfo &STI,
|
|
const MCInstrInfo &MCII) {
|
|
return new X86InstrPostProcess(STI, MCII);
|
|
}
|
|
|
|
/// Extern function to initialize the targets for the X86 backend
|
|
|
|
extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeX86TargetMCA() {
|
|
TargetRegistry::RegisterInstrPostProcess(getTheX86_32Target(),
|
|
createX86InstrPostProcess);
|
|
TargetRegistry::RegisterInstrPostProcess(getTheX86_64Target(),
|
|
createX86InstrPostProcess);
|
|
}
|