83 lines
2.5 KiB
C++
83 lines
2.5 KiB
C++
//== 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_LEGALIZER_H
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#define LLVM_CODEGEN_GLOBALISEL_LEGALIZER_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/CodeGen/GlobalISel/GISelValueTracking.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/Compiler.h"
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namespace llvm {
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class LegalizerInfo;
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class MachineIRBuilder;
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class MachineInstr;
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class GISelChangeObserver;
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class LibcallLoweringInfo;
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class LostDebugLocObserver;
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class LLVM_ABI 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().setIsSSA();
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}
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MachineFunctionProperties getSetProperties() const override {
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return MachineFunctionProperties().setLegalized();
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}
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MachineFunctionProperties getClearedProperties() const override {
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return MachineFunctionProperties().setNoPHIs().setNoVRegs();
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}
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bool runOnMachineFunction(MachineFunction &MF) override;
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static MFResult legalizeMachineFunction(
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MachineFunction &MF, const LegalizerInfo &LI,
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ArrayRef<GISelChangeObserver *> AuxObservers,
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LostDebugLocObserver &LocObserver, MachineIRBuilder &MIRBuilder,
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const LibcallLoweringInfo *Libcalls, GISelValueTracking *VT);
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};
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} // End namespace llvm.
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#endif
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