llvm/llvm/lib/Target/RISCV/GISel/RISCVPreLegalizerCombiner.cpp

//=== RISCVPreLegalizerCombiner.cpp ---------------------------------------===//
//
// 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 pass does combining of machine instructions at the generic MI level,
// before the legalizer.
//
//===----------------------------------------------------------------------===//

#include "RISCVSubtarget.h"
#include "llvm/CodeGen/GlobalISel/CSEInfo.h"
#include "llvm/CodeGen/GlobalISel/Combiner.h"
#include "llvm/CodeGen/GlobalISel/CombinerHelper.h"
#include "llvm/CodeGen/GlobalISel/CombinerInfo.h"
#include "llvm/CodeGen/GlobalISel/GIMatchTableExecutorImpl.h"
#include "llvm/CodeGen/GlobalISel/GISelKnownBits.h"
#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
#include "llvm/CodeGen/MachineDominators.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/TargetPassConfig.h"

#define GET_GICOMBINER_DEPS
#include "RISCVGenPreLegalizeGICombiner.inc"
#undef GET_GICOMBINER_DEPS

#define DEBUG_TYPE …

usingnamespacellvm;

namespace {

#define GET_GICOMBINER_TYPES
#include "RISCVGenPreLegalizeGICombiner.inc"
#undef GET_GICOMBINER_TYPES

class RISCVPreLegalizerCombinerImpl : public Combiner { … };

#define GET_GICOMBINER_IMPL
#include "RISCVGenPreLegalizeGICombiner.inc"
#undef GET_GICOMBINER_IMPL

RISCVPreLegalizerCombinerImpl::RISCVPreLegalizerCombinerImpl(
    MachineFunction &MF, CombinerInfo &CInfo, const TargetPassConfig *TPC,
    GISelKnownBits &KB, GISelCSEInfo *CSEInfo,
    const RISCVPreLegalizerCombinerImplRuleConfig &RuleConfig,
    const RISCVSubtarget &STI, MachineDominatorTree *MDT,
    const LegalizerInfo *LI)
    : … { … }

// Pass boilerplate
// ================

class RISCVPreLegalizerCombiner : public MachineFunctionPass { … };
} // end anonymous namespace

void RISCVPreLegalizerCombiner::getAnalysisUsage(AnalysisUsage &AU) const { … }

RISCVPreLegalizerCombiner::RISCVPreLegalizerCombiner()
    : … { … }

bool RISCVPreLegalizerCombiner::runOnMachineFunction(MachineFunction &MF) { … }

char RISCVPreLegalizerCombiner::ID = …;
INITIALIZE_PASS_BEGIN(RISCVPreLegalizerCombiner, DEBUG_TYPE,
                      "Combine RISC-V machine instrs before legalization", false,
                      false)
INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
INITIALIZE_PASS_DEPENDENCY(GISelKnownBitsAnalysis)
INITIALIZE_PASS_DEPENDENCY(GISelCSEAnalysisWrapperPass)
INITIALIZE_PASS_END(RISCVPreLegalizerCombiner, DEBUG_TYPE,
                    "Combine RISC-V machine instrs before legalization", false,
                    false)

namespace llvm {
FunctionPass *createRISCVPreLegalizerCombiner() { … }
} // end namespace llvm