diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/llvm/Support/BlockFrequency.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/include/llvm/Support/BlockFrequency.h b/include/llvm/Support/BlockFrequency.h index 666b3c8..21879e7 100644 --- a/include/llvm/Support/BlockFrequency.h +++ b/include/llvm/Support/BlockFrequency.h @@ -27,8 +27,10 @@ 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); + /// \brief Scale the given BlockFrequency by N/D. Return the remainder from + /// the division by D. Upon overflow, the routine will saturate and + /// additionally will return the remainder set to D. + uint32_t scale(uint32_t N, uint32_t D); public: BlockFrequency(uint64_t Freq = 0) : Frequency(Freq) { } @@ -57,6 +59,10 @@ public: BlockFrequency &operator+=(const BlockFrequency &Freq); const BlockFrequency operator+(const BlockFrequency &Freq) const; + /// \brief Scale the given BlockFrequency by N/D. Return the remainder from + /// the division by D. Upon overflow, the routine will saturate. + uint32_t scale(const BranchProbability &Prob); + bool operator<(const BlockFrequency &RHS) const { return Frequency < RHS.Frequency; } |