78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
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//== llvm/CodeGen/GlobalISel/Legalizer.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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//
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/// \file A pass to convert the target-illegal operations created by IR -> MIR
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/// translation into ones the target expects to be able to select. This may
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/// occur in multiple phases, for example G_ADD <2 x i8> -> G_ADD <2 x i16> ->
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/// G_ADD <4 x i16>.
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///
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/// The LegalizeHelper class is where most of the work happens, and is designed
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/// to be callable from other passes that find themselves with an illegal
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/// instruction.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_GLOBALISEL_LEGALIZEMACHINEIRPASS_H
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#define LLVM_CODEGEN_GLOBALISEL_LEGALIZEMACHINEIRPASS_H
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#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
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#include "llvm/CodeGen/MachineFunctionPass.h"
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namespace llvm {
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class MachineRegisterInfo;
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class LostDebugLocObserver;
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class Legalizer : public MachineFunctionPass {
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public:
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static char ID;
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struct MFResult {
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bool Changed;
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const MachineInstr *FailedOn;
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};
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private:
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/// Initialize the field members using \p MF.
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void init(MachineFunction &MF);
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public:
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// Ctor, nothing fancy.
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Legalizer();
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StringRef getPassName() const override { return "Legalizer"; }
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void getAnalysisUsage(AnalysisUsage &AU) const override;
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MachineFunctionProperties getRequiredProperties() const override {
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return MachineFunctionProperties().set(
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MachineFunctionProperties::Property::IsSSA);
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}
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MachineFunctionProperties getSetProperties() const override {
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return MachineFunctionProperties().set(
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MachineFunctionProperties::Property::Legalized);
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}
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MachineFunctionProperties getClearedProperties() const override {
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return MachineFunctionProperties().set(
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MachineFunctionProperties::Property::NoPHIs);
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}
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bool runOnMachineFunction(MachineFunction &MF) override;
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static MFResult
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legalizeMachineFunction(MachineFunction &MF, const LegalizerInfo &LI,
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ArrayRef<GISelChangeObserver *> AuxObservers,
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LostDebugLocObserver &LocObserver,
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MachineIRBuilder &MIRBuilder);
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};
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} // End namespace llvm.
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#endif
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