1 //== llvm/CodeGen/GlobalISel/InstructionSelect.h -----------------*- C++ -*-==// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 /// \file This file describes the interface of the MachineFunctionPass 9 /// responsible for selecting (possibly generic) machine instructions to 10 /// target-specific instructions. 11 //===----------------------------------------------------------------------===// 12 13 #ifndef LLVM_CODEGEN_GLOBALISEL_INSTRUCTIONSELECT_H 14 #define LLVM_CODEGEN_GLOBALISEL_INSTRUCTIONSELECT_H 15 16 #include "llvm/CodeGen/GlobalISel/InstructionSelector.h" 17 #include "llvm/CodeGen/MachineFunctionPass.h" 18 19 namespace llvm { 20 /// This pass is responsible for selecting generic machine instructions to 21 /// target-specific instructions. It relies on the InstructionSelector provided 22 /// by the target. 23 /// Selection is done by examining blocks in post-order, and instructions in 24 /// reverse order. 25 /// 26 /// \post for all inst in MF: not isPreISelGenericOpcode(inst.opcode) 27 class InstructionSelect : public MachineFunctionPass { 28 public: 29 static char ID; getPassName()30 StringRef getPassName() const override { return "InstructionSelect"; } 31 32 void getAnalysisUsage(AnalysisUsage &AU) const override; 33 getRequiredProperties()34 MachineFunctionProperties getRequiredProperties() const override { 35 return MachineFunctionProperties() 36 .set(MachineFunctionProperties::Property::IsSSA) 37 .set(MachineFunctionProperties::Property::Legalized) 38 .set(MachineFunctionProperties::Property::RegBankSelected); 39 } 40 getSetProperties()41 MachineFunctionProperties getSetProperties() const override { 42 return MachineFunctionProperties().set( 43 MachineFunctionProperties::Property::Selected); 44 } 45 46 InstructionSelect(); 47 48 bool runOnMachineFunction(MachineFunction &MF) override; 49 }; 50 } // End namespace llvm. 51 52 #endif 53