76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
//== llvm/CodeGen/GlobalISel/InstructionSelect.h -----------------*- C++ -*-==//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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/// \file This file describes the interface of the MachineFunctionPass
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/// responsible for selecting (possibly generic) machine instructions to
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/// target-specific instructions.
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_GLOBALISEL_INSTRUCTIONSELECT_H
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#define LLVM_CODEGEN_GLOBALISEL_INSTRUCTIONSELECT_H
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#include "llvm/ADT/StringRef.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/Support/CodeGen.h"
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#include "llvm/Support/Compiler.h"
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namespace llvm {
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class InstructionSelector;
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class GISelValueTracking;
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class BlockFrequencyInfo;
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class ProfileSummaryInfo;
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/// This pass is responsible for selecting generic machine instructions to
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/// target-specific instructions. It relies on the InstructionSelector provided
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/// by the target.
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/// Selection is done by examining blocks in post-order, and instructions in
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/// reverse order.
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///
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/// \post for all inst in MF: not isPreISelGenericOpcode(inst.opcode)
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class LLVM_ABI InstructionSelect : public MachineFunctionPass {
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public:
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static char ID;
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StringRef getPassName() const override { return "InstructionSelect"; }
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void getAnalysisUsage(AnalysisUsage &AU) const override;
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MachineFunctionProperties getRequiredProperties() const override {
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return MachineFunctionProperties()
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.setIsSSA()
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.setLegalized()
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.setRegBankSelected();
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}
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MachineFunctionProperties getSetProperties() const override {
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return MachineFunctionProperties().setSelected();
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}
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InstructionSelect(CodeGenOptLevel OL = CodeGenOptLevel::Default,
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char &PassID = ID);
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bool runOnMachineFunction(MachineFunction &MF) override;
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bool selectMachineFunction(MachineFunction &MF);
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void setInstructionSelector(InstructionSelector *NewISel) { ISel = NewISel; }
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protected:
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class MIIteratorMaintainer;
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InstructionSelector *ISel = nullptr;
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GISelValueTracking *VT = nullptr;
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BlockFrequencyInfo *BFI = nullptr;
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ProfileSummaryInfo *PSI = nullptr;
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CodeGenOptLevel OptLevel = CodeGenOptLevel::None;
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bool selectInstr(MachineInstr &MI);
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};
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} // End namespace llvm.
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#endif
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