lib/Support/BranchProbability.cpp

   1 //===-------------- lib/Support/BranchProbability.cpp -----------*- 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 Branch Probability class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "llvm/Support/BranchProbability.h"
  15 #include "llvm/Support/Debug.h"
  16 #include "llvm/Support/raw_ostream.h"
  17
  18 using namespace llvm;
  19
  20 BranchProbability::BranchProbability(uint32_t n, uint32_t d) {
  21   assert(d > 0 && "Denomiator cannot be 0!");
  22   assert(n <= d && "Probability cannot be bigger than 1!");
  23   N = n;
  24   D = d;
  25 }
  26
  27 raw_ostream &BranchProbability::print(raw_ostream &OS) const {
  28   OS << N << " / " << D << " = " << ((double)N / D);
  29   return OS;
  30 }
  31
  32 void BranchProbability::dump() const {
  33   print(dbgs());
  34   dbgs() << "\n";
  35 }
  36
  37 namespace llvm {
  38
  39 raw_ostream &operator<<(raw_ostream &OS, const BranchProbability &Prob) {
  40   Prob.print(OS);
  41   return OS;
  42 }
  43
  44 }