| //== 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_LEGALIZEMACHINEIRPASS_H |
| #define LLVM_CODEGEN_GLOBALISEL_LEGALIZEMACHINEIRPASS_H |
| |
| #include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h" |
| #include "llvm/CodeGen/MachineFunctionPass.h" |
| |
| namespace llvm { |
| |
| class MachineRegisterInfo; |
| |
| class Legalizer : public MachineFunctionPass { |
| public: |
| static char ID; |
| |
| 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); |
| } |
| |
| bool combineExtracts(MachineInstr &MI, MachineRegisterInfo &MRI, |
| const TargetInstrInfo &TII); |
| |
| bool runOnMachineFunction(MachineFunction &MF) override; |
| }; |
| } // End namespace llvm. |
| |
| #endif |