1 //===--------------------- RegisterFileStatistics.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 /// \file 10 /// 11 /// This view collects and prints register file usage statistics. 12 /// 13 /// Example (-mcpu=btver2): 14 /// ======================== 15 /// 16 /// Register File statistics: 17 /// Total number of mappings created: 6 18 /// Max number of mappings used: 3 19 /// 20 /// * Register File #1 -- FpuPRF: 21 /// Number of physical registers: 72 22 /// Total number of mappings created: 0 23 /// Max number of mappings used: 0 24 /// 25 /// * Register File #2 -- IntegerPRF: 26 /// Number of physical registers: 64 27 /// Total number of mappings created: 6 28 /// Max number of mappings used: 3 29 // 30 //===----------------------------------------------------------------------===// 31 32 #ifndef LLVM_TOOLS_LLVM_MCA_REGISTERFILESTATISTICS_H 33 #define LLVM_TOOLS_LLVM_MCA_REGISTERFILESTATISTICS_H 34 35 #include "View.h" 36 #include "llvm/ADT/SmallVector.h" 37 #include "llvm/MC/MCSubtargetInfo.h" 38 39 namespace mca { 40 41 class RegisterFileStatistics : public View { 42 const llvm::MCSubtargetInfo &STI; 43 44 // Used to track the number of physical registers used in a register file. 45 struct RegisterFileUsage { 46 unsigned TotalMappings; 47 unsigned MaxUsedMappings; 48 unsigned CurrentlyUsedMappings; 49 }; 50 51 // There is one entry for each register file implemented by the processor. 52 llvm::SmallVector<RegisterFileUsage, 4> RegisterFiles; 53 54 void initializeRegisterFileInfo(); 55 56 public: RegisterFileStatistics(const llvm::MCSubtargetInfo & sti)57 RegisterFileStatistics(const llvm::MCSubtargetInfo &sti) : STI(sti) { 58 initializeRegisterFileInfo(); 59 } 60 61 void onEvent(const HWInstructionEvent &Event) override; 62 63 void printView(llvm::raw_ostream &OS) const override; 64 }; 65 } // namespace mca 66 67 #endif 68