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