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/ADT/StringRef.h" 17 #include "llvm/CodeGen/MachineFunction.h" 18 #include "llvm/CodeGen/MachineFunctionPass.h" 19 #include "llvm/Support/CodeGen.h" 20 21 namespace llvm { 22 23 class BlockFrequencyInfo; 24 class ProfileSummaryInfo; 25 26 /// This pass is responsible for selecting generic machine instructions to 27 /// target-specific instructions. It relies on the InstructionSelector provided 28 /// by the target. 29 /// Selection is done by examining blocks in post-order, and instructions in 30 /// reverse order. 31 /// 32 /// \post for all inst in MF: not isPreISelGenericOpcode(inst.opcode) 33 class InstructionSelect : public MachineFunctionPass { 34 public: 35 static char ID; 36 StringRef getPassName() const override { return "InstructionSelect"; } 37 38 void getAnalysisUsage(AnalysisUsage &AU) const override; 39 40 MachineFunctionProperties getRequiredProperties() const override { 41 return MachineFunctionProperties() 42 .set(MachineFunctionProperties::Property::IsSSA) 43 .set(MachineFunctionProperties::Property::Legalized) 44 .set(MachineFunctionProperties::Property::RegBankSelected); 45 } 46 47 MachineFunctionProperties getSetProperties() const override { 48 return MachineFunctionProperties().set( 49 MachineFunctionProperties::Property::Selected); 50 } 51 52 InstructionSelect(CodeGenOpt::Level OL); 53 InstructionSelect(); 54 55 bool runOnMachineFunction(MachineFunction &MF) override; 56 57 protected: 58 BlockFrequencyInfo *BFI = nullptr; 59 ProfileSummaryInfo *PSI = nullptr; 60 61 CodeGenOpt::Level OptLevel = CodeGenOpt::None; 62 }; 63 } // End namespace llvm. 64 65 #endif 66