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| 14 | pmbaty | 1 | //== llvm/CodeGen/GlobalISel/Legalizer.h ---------------- -*- C++ -*-==// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | /// \file A pass to convert the target-illegal operations created by IR -> MIR |
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| 10 | /// translation into ones the target expects to be able to select. This may |
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| 11 | /// occur in multiple phases, for example G_ADD <2 x i8> -> G_ADD <2 x i16> -> |
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| 12 | /// G_ADD <4 x i16>. |
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| 13 | /// |
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| 14 | /// The LegalizeHelper class is where most of the work happens, and is designed |
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| 15 | /// to be callable from other passes that find themselves with an illegal |
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| 16 | /// instruction. |
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| 17 | // |
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| 18 | //===----------------------------------------------------------------------===// |
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| 19 | |||
| 20 | #ifndef LLVM_CODEGEN_GLOBALISEL_LEGALIZER_H |
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| 21 | #define LLVM_CODEGEN_GLOBALISEL_LEGALIZER_H |
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| 22 | |||
| 23 | #include "llvm/ADT/ArrayRef.h" |
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| 24 | #include "llvm/ADT/StringRef.h" |
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| 25 | #include "llvm/CodeGen/MachineFunction.h" |
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| 26 | #include "llvm/CodeGen/MachineFunctionPass.h" |
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| 27 | |||
| 28 | namespace llvm { |
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| 29 | |||
| 30 | class LegalizerInfo; |
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| 31 | class MachineIRBuilder; |
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| 32 | class MachineInstr; |
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| 33 | class GISelChangeObserver; |
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| 34 | class LostDebugLocObserver; |
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| 35 | |||
| 36 | class Legalizer : public MachineFunctionPass { |
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| 37 | public: |
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| 38 | static char ID; |
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| 39 | |||
| 40 | struct MFResult { |
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| 41 | bool Changed; |
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| 42 | const MachineInstr *FailedOn; |
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| 43 | }; |
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| 44 | |||
| 45 | private: |
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| 46 | /// Initialize the field members using \p MF. |
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| 47 | void init(MachineFunction &MF); |
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| 48 | |||
| 49 | public: |
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| 50 | // Ctor, nothing fancy. |
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| 51 | Legalizer(); |
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| 52 | |||
| 53 | StringRef getPassName() const override { return "Legalizer"; } |
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| 54 | |||
| 55 | void getAnalysisUsage(AnalysisUsage &AU) const override; |
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| 56 | |||
| 57 | MachineFunctionProperties getRequiredProperties() const override { |
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| 58 | return MachineFunctionProperties().set( |
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| 59 | MachineFunctionProperties::Property::IsSSA); |
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| 60 | } |
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| 61 | |||
| 62 | MachineFunctionProperties getSetProperties() const override { |
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| 63 | return MachineFunctionProperties().set( |
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| 64 | MachineFunctionProperties::Property::Legalized); |
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| 65 | } |
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| 66 | |||
| 67 | MachineFunctionProperties getClearedProperties() const override { |
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| 68 | return MachineFunctionProperties().set( |
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| 69 | MachineFunctionProperties::Property::NoPHIs); |
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| 70 | } |
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| 71 | |||
| 72 | bool runOnMachineFunction(MachineFunction &MF) override; |
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| 73 | |||
| 74 | static MFResult |
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| 75 | legalizeMachineFunction(MachineFunction &MF, const LegalizerInfo &LI, |
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| 76 | ArrayRef<GISelChangeObserver *> AuxObservers, |
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| 77 | LostDebugLocObserver &LocObserver, |
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| 78 | MachineIRBuilder &MIRBuilder); |
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| 79 | }; |
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| 80 | } // End namespace llvm. |
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| 81 | |||
| 82 | #endif |