Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//== llvm/CodeGen/GlobalISel/InstructionSelect.h -----------------*- 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 describes the interface of the MachineFunctionPass

/// responsible for selecting (possibly generic) machine instructions to

/// target-specific instructions.

//===----------------------------------------------------------------------===//

#ifndef LLVM_CODEGEN_GLOBALISEL_INSTRUCTIONSELECT_H

#define LLVM_CODEGEN_GLOBALISEL_INSTRUCTIONSELECT_H

#include "llvm/ADT/StringRef.h"

#include "llvm/CodeGen/MachineFunction.h"

#include "llvm/CodeGen/MachineFunctionPass.h"

#include "llvm/Support/CodeGen.h"

namespace llvm {

class BlockFrequencyInfo;

class ProfileSummaryInfo;

/// This pass is responsible for selecting generic machine instructions to

/// target-specific instructions.  It relies on the InstructionSelector provided

/// by the target.

/// Selection is done by examining blocks in post-order, and instructions in

/// reverse order.

///

/// \post for all inst in MF: not isPreISelGenericOpcode(inst.opcode)

class InstructionSelect : public MachineFunctionPass {

public:

  static char ID;

  StringRef getPassName() const override { return "InstructionSelect"; }

  void getAnalysisUsage(AnalysisUsage &AU) const override;

  MachineFunctionProperties getRequiredProperties() const override {

    return MachineFunctionProperties()

        .set(MachineFunctionProperties::Property::IsSSA)

        .set(MachineFunctionProperties::Property::Legalized)

        .set(MachineFunctionProperties::Property::RegBankSelected);

  }

  MachineFunctionProperties getSetProperties() const override {

    return MachineFunctionProperties().set(

        MachineFunctionProperties::Property::Selected);

  }

  InstructionSelect(CodeGenOpt::Level OL);

  InstructionSelect();

  bool runOnMachineFunction(MachineFunction &MF) override;

protected:

  BlockFrequencyInfo *BFI = nullptr;

  ProfileSummaryInfo *PSI = nullptr;

  CodeGenOpt::Level OptLevel = CodeGenOpt::None;

};

} // End namespace llvm.

#endif