1 //===-------- BlockFrequency.h - Block Frequency Wrapper --------*- 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 // 10 // This file implements Block Frequency class. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_SUPPORT_BLOCKFREQUENCY_H 15 #define LLVM_SUPPORT_BLOCKFREQUENCY_H 16 17 #include "llvm/Support/DataTypes.h" 18 19 namespace llvm { 20 21 class raw_ostream; 22 class BranchProbability; 23 24 // This class represents Block Frequency as a 64-bit value. 25 class BlockFrequency { 26 27 uint64_t Frequency; 28 static const int64_t ENTRY_FREQ = 1024; 29 30 public: 31 BlockFrequency(uint64_t Freq = 0) : Frequency(Freq) { } 32 33 static uint64_t getEntryFrequency() { return ENTRY_FREQ; } 34 uint64_t getFrequency() const { return Frequency; } 35 36 BlockFrequency &operator*=(const BranchProbability &Prob); 37 const BlockFrequency operator*(const BranchProbability &Prob) const; 38 39 BlockFrequency &operator+=(const BlockFrequency &Freq); 40 const BlockFrequency operator+(const BlockFrequency &Freq) const; 41 42 bool operator<(const BlockFrequency &RHS) const { 43 return Frequency < RHS.Frequency; 44 } 45 46 bool operator<=(const BlockFrequency &RHS) const { 47 return Frequency <= RHS.Frequency; 48 } 49 50 bool operator>(const BlockFrequency &RHS) const { 51 return Frequency > RHS.Frequency; 52 } 53 54 bool operator>=(const BlockFrequency &RHS) const { 55 return Frequency >= RHS.Frequency; 56 } 57 58 void print(raw_ostream &OS) const; 59 }; 60 61 raw_ostream &operator<<(raw_ostream &OS, const BlockFrequency &Freq); 62 63 } 64 65 #endif 66
