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/IntrusiveRefCntPtr.h" 18 #include "llvm/ADT/StringRef.h" 19 #include "llvm/CodeGen/MachineFunctionPass.h" 20 #include "llvm/Support/Discriminator.h" 21 #include <memory> 22 #include <string> 23 24 namespace llvm { 25 class AnalysisUsage; 26 class MachineBlockFrequencyInfo; 27 class MachineFunction; 28 class Module; 29 30 namespace vfs { 31 class FileSystem; 32 } // namespace vfs 33 34 using namespace sampleprof; 35 36 class MIRProfileLoader; 37 class MIRProfileLoaderPass : public MachineFunctionPass { 38 MachineFunction *MF; 39 std::string ProfileFileName; 40 FSDiscriminatorPass P; 41 unsigned LowBit; 42 unsigned HighBit; 43 44 public: 45 static char ID; 46 /// FS bits will only use the '1' bits in the Mask. 47 MIRProfileLoaderPass(std::string FileName = "", 48 std::string RemappingFileName = "", 49 FSDiscriminatorPass P = FSDiscriminatorPass::Pass1, 50 IntrusiveRefCntPtr<vfs::FileSystem> FS = nullptr); 51 52 /// getMachineFunction - Return the last machine function computed. 53 const MachineFunction *getMachineFunction() const { return MF; } 54 55 StringRef getPassName() const override { return "SampleFDO loader in MIR"; } 56 57 private: 58 void init(MachineFunction &MF); 59 bool runOnMachineFunction(MachineFunction &) override; 60 bool doInitialization(Module &M) override; 61 void getAnalysisUsage(AnalysisUsage &AU) const override; 62 63 std::unique_ptr<MIRProfileLoader> MIRSampleLoader; 64 /// Hold the information of the basic block frequency. 65 MachineBlockFrequencyInfo *MBFI; 66 }; 67 68 } // namespace llvm 69 70 #endif // LLVM_CODEGEN_MIRSAMPLEPROFILE_H 71