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📄 CSEInfo.cpp(12.25 KB)
📄 CSEMIRBuilder.cpp(8.85 KB)
📄 CallLowering.cpp(19.93 KB)
📄 Combiner.cpp(5.58 KB)
📄 CombinerHelper.cpp(62.81 KB)
📄 GISelChangeObserver.cpp(1.69 KB)
📄 GISelKnownBits.cpp(18.45 KB)
📄 GlobalISel.cpp(901 B)
📄 IRTranslator.cpp(90.61 KB)
📄 InlineAsmLowering.cpp(24.72 KB)
📄 InstructionSelect.cpp(9.31 KB)
📄 InstructionSelector.cpp(2.88 KB)
📄 LegalityPredicates.cpp(6.61 KB)
📄 LegalizeMutations.cpp(2.68 KB)
📄 Legalizer.cpp(14.52 KB)
📄 LegalizerHelper.cpp(185.18 KB)
📄 LegalizerInfo.cpp(27.83 KB)
📄 Localizer.cpp(7.14 KB)
📄 LostDebugLocObserver.cpp(3.38 KB)
📄 MachineIRBuilder.cpp(45.42 KB)
📄 RegBankSelect.cpp(41.82 KB)
📄 RegisterBank.cpp(3.96 KB)
📄 RegisterBankInfo.cpp(30.26 KB)
📄 Utils.cpp(19.66 KB)

Editing: InstructionSelector.cpp

//===- llvm/CodeGen/GlobalISel/InstructionSelector.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
//
//===----------------------------------------------------------------------===//
//
/// \file
/// This file implements the InstructionSelector class.
//
//===----------------------------------------------------------------------===//

#include "llvm/CodeGen/GlobalISel/InstructionSelector.h"
#include "llvm/CodeGen/GlobalISel/Utils.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
#include "llvm/MC/MCInstrDesc.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include <cassert>

#define DEBUG_TYPE "instructionselector"

using namespace llvm;

InstructionSelector::MatcherState::MatcherState(unsigned MaxRenderers)
    : Renderers(MaxRenderers), MIs() {}

InstructionSelector::InstructionSelector() = default;

bool InstructionSelector::constrainOperandRegToRegClass(
    MachineInstr &I, unsigned OpIdx, const TargetRegisterClass &RC,
    const TargetInstrInfo &TII, const TargetRegisterInfo &TRI,
    const RegisterBankInfo &RBI) const {
  MachineBasicBlock &MBB = *I.getParent();
  MachineFunction &MF = *MBB.getParent();
  MachineRegisterInfo &MRI = MF.getRegInfo();

return constrainOperandRegClass(MF, TRI, MRI, TII, RBI, I, RC,
                                  I.getOperand(OpIdx));
}

bool InstructionSelector::isOperandImmEqual(
    const MachineOperand &MO, int64_t Value,
    const MachineRegisterInfo &MRI) const {
  if (MO.isReg() && MO.getReg())
    if (auto VRegVal = getConstantVRegValWithLookThrough(MO.getReg(), MRI))
      return VRegVal->Value == Value;
  return false;
}

bool InstructionSelector::isBaseWithConstantOffset(
    const MachineOperand &Root, const MachineRegisterInfo &MRI) const {
  if (!Root.isReg())
    return false;

MachineInstr *RootI = MRI.getVRegDef(Root.getReg());
  if (RootI->getOpcode() != TargetOpcode::G_PTR_ADD)
    return false;

MachineOperand &RHS = RootI->getOperand(2);
  MachineInstr *RHSI = MRI.getVRegDef(RHS.getReg());
  if (RHSI->getOpcode() != TargetOpcode::G_CONSTANT)
    return false;

return true;
}

bool InstructionSelector::isObviouslySafeToFold(MachineInstr &MI,
                                                MachineInstr &IntoMI) const {
  // Immediate neighbours are already folded.
  if (MI.getParent() == IntoMI.getParent() &&
      std::next(MI.getIterator()) == IntoMI.getIterator())
    return true;

return !MI.mayLoadOrStore() && !MI.mayRaiseFPException() &&
         !MI.hasUnmodeledSideEffects() && MI.implicit_operands().empty();
}

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Editing: InstructionSelector.cpp

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