1 //== llvm/CodeGen/GlobalISel/LegalizePass.h ------------- -*- C++ -*-==// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 /// \file A pass to convert the target-illegal operations created by IR -> MIR 11 /// translation into ones the target expects to be able to select. This may 12 /// occur in multiple phases, for example G_ADD <2 x i8> -> G_ADD <2 x i16> -> 13 /// G_ADD <4 x i16>. 14 /// 15 /// The LegalizeHelper class is where most of the work happens, and is designed 16 /// to be callable from other passes that find themselves with an illegal 17 /// instruction. 18 // 19 //===----------------------------------------------------------------------===// 20 21 #ifndef LLVM_CODEGEN_GLOBALISEL_LEGALIZEMACHINEIRPASS_H 22 #define LLVM_CODEGEN_GLOBALISEL_LEGALIZEMACHINEIRPASS_H 23 24 #include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h" 25 #include "llvm/CodeGen/MachineFunctionPass.h" 26 27 namespace llvm { 28 29 class MachineRegisterInfo; 30 31 class Legalizer : public MachineFunctionPass { 32 public: 33 static char ID; 34 35 private: 36 37 /// Initialize the field members using \p MF. 38 void init(MachineFunction &MF); 39 40 public: 41 // Ctor, nothing fancy. 42 Legalizer(); 43 44 StringRef getPassName() const override { return "Legalizer"; } 45 46 void getAnalysisUsage(AnalysisUsage &AU) const override; 47 48 MachineFunctionProperties getRequiredProperties() const override { 49 return MachineFunctionProperties().set( 50 MachineFunctionProperties::Property::IsSSA); 51 } 52 53 MachineFunctionProperties getSetProperties() const override { 54 return MachineFunctionProperties().set( 55 MachineFunctionProperties::Property::Legalized); 56 } 57 58 bool combineExtracts(MachineInstr &MI, MachineRegisterInfo &MRI, 59 const TargetInstrInfo &TII); 60 61 bool combineMerges(MachineInstr &MI, MachineRegisterInfo &MRI, 62 const TargetInstrInfo &TII); 63 64 bool runOnMachineFunction(MachineFunction &MF) override; 65 }; 66 } // End namespace llvm. 67 68 #endif 69
