1 //===-------- BlockFrequency.h - Block Frequency Wrapper --------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements Block Frequency class.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_SUPPORT_BLOCKFREQUENCY_H
15 #define LLVM_SUPPORT_BLOCKFREQUENCY_H
20 class BranchProbability;
22 // This class represents Block Frequency as a 64-bit value.
23 class BlockFrequency {
26 static const int64_t ENTRY_FREQ = 1024;
29 BlockFrequency(uint64_t Freq = 0) : Frequency(Freq) { }
31 static uint64_t getEntryFrequency() { return ENTRY_FREQ; }
32 uint64_t getFrequency() const { return Frequency; }
34 BlockFrequency &operator*=(const BranchProbability &Prob);
35 const BlockFrequency operator*(const BranchProbability &Prob) const;
37 BlockFrequency &operator+=(const BlockFrequency &Freq);
38 const BlockFrequency operator+(const BlockFrequency &Freq) const;
40 bool operator<(const BlockFrequency &RHS) const {
41 return Frequency < RHS.Frequency;
44 bool operator<=(const BlockFrequency &RHS) const {
45 return Frequency <= RHS.Frequency;
48 bool operator>(const BlockFrequency &RHS) const {
49 return Frequency > RHS.Frequency;
52 bool operator>=(const BlockFrequency &RHS) const {
53 return Frequency >= RHS.Frequency;
56 void print(raw_ostream &OS) const;
59 raw_ostream &operator<<(raw_ostream &OS, const BlockFrequency &Freq);