// This class represents Block Frequency as a 64-bit value.
class BlockFrequency {
-
uint64_t Frequency;
- static const int64_t ENTRY_FREQ = 1 << 14;
-
- // Scale frequency by N/D, saturating on overflow.
- void scale(uint32_t N, uint32_t D);
public:
BlockFrequency(uint64_t Freq = 0) : Frequency(Freq) { }
- /// \brief Returns the frequency of the entry block of the function.
- static uint64_t getEntryFrequency() { return ENTRY_FREQ; }
-
- /// \brief Returns the maximum possible prequency, the saturation value.
+ /// \brief Returns the maximum possible frequency, the saturation value.
static uint64_t getMaxFrequency() { return -1ULL; }
/// \brief Returns the frequency as a fixpoint number scaled by the entry
BlockFrequency &operator+=(const BlockFrequency &Freq);
const BlockFrequency operator+(const BlockFrequency &Freq) const;
+ /// \brief Shift block frequency to the right by count digits saturating to 1.
+ BlockFrequency &operator>>=(const unsigned count);
+
bool operator<(const BlockFrequency &RHS) const {
return Frequency < RHS.Frequency;
}
bool operator>=(const BlockFrequency &RHS) const {
return Frequency >= RHS.Frequency;
}
-
- void print(raw_ostream &OS) const;
};
-raw_ostream &operator<<(raw_ostream &OS, const BlockFrequency &Freq);
-
}
#endif