1 //===----- MIRSampleProfile.h: SampleFDO Support in MIR ---*- 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 // 9 // This file contains the supoorting functions for machine level Sample FDO 10 // loader. This is used in Flow Sensitive SampelFDO. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_CODEGEN_MIRSAMPLEPROFILE_H 15 #define LLVM_CODEGEN_MIRSAMPLEPROFILE_H 16 17 #include "llvm/ADT/StringRef.h" 18 #include "llvm/CodeGen/MachineFunctionPass.h" 19 #include "llvm/Support/Discriminator.h" 20 #include <memory> 21 #include <string> 22 23 namespace llvm { 24 class AnalysisUsage; 25 class MachineBlockFrequencyInfo; 26 class MachineFunction; 27 class Module; 28 29 using namespace sampleprof; 30 31 class MIRProfileLoader; 32 class MIRProfileLoaderPass : public MachineFunctionPass { 33 MachineFunction *MF; 34 std::string ProfileFileName; 35 FSDiscriminatorPass P; 36 unsigned LowBit; 37 unsigned HighBit; 38 39 public: 40 static char ID; 41 /// FS bits will only use the '1' bits in the Mask. 42 MIRProfileLoaderPass(std::string FileName = "", 43 std::string RemappingFileName = "", 44 FSDiscriminatorPass P = FSDiscriminatorPass::Pass1); 45 46 /// getMachineFunction - Return the last machine function computed. 47 const MachineFunction *getMachineFunction() const { return MF; } 48 49 StringRef getPassName() const override { return "SampleFDO loader in MIR"; } 50 51 private: 52 void init(MachineFunction &MF); 53 bool runOnMachineFunction(MachineFunction &) override; 54 bool doInitialization(Module &M) override; 55 void getAnalysisUsage(AnalysisUsage &AU) const override; 56 57 std::unique_ptr<MIRProfileLoader> MIRSampleLoader; 58 /// Hold the information of the basic block frequency. 59 MachineBlockFrequencyInfo *MBFI; 60 }; 61 62 } // namespace llvm 63 64 #endif // LLVM_CODEGEN_MIRSAMPLEPROFILE_H 65