[ARM] Use BranchProbability::scale() to scale an integer with a probability in ARMBas...

[oota-llvm.git] / lib / Target / ARM / ARMBaseInstrInfo.cpp

diff --git a/lib/Target/ARM/ARMBaseInstrInfo.cpp b/lib/Target/ARM/ARMBaseInstrInfo.cpp
index 2f97b2ef4d2edf7d17457b580c693e58dc171092..47a6338f4c3141c7bc09ff974e8b6e5a77046481 100644 (file)
--- a/lib/Target/ARM/ARMBaseInstrInfo.cpp
+++ b/lib/Target/ARM/ARMBaseInstrInfo.cpp
@@ -1670,8 +1670,7 @@ isProfitableToIfCvt(MachineBasicBlock &MBB,
   }
 
   // Attempt to estimate the relative costs of predication versus branching.
-  unsigned UnpredCost = Probability.getNumerator() * NumCycles;
-  UnpredCost /= Probability.getDenominator();
+  unsigned UnpredCost = Probability.scale(NumCycles);
   UnpredCost += 1; // The branch itself
   UnpredCost += Subtarget.getMispredictionPenalty() / 10;
 
@@ -1688,13 +1687,8 @@ isProfitableToIfCvt(MachineBasicBlock &TMBB,
     return false;
 
   // Attempt to estimate the relative costs of predication versus branching.
-  unsigned TUnpredCost = Probability.getNumerator() * TCycles;
-  TUnpredCost /= Probability.getDenominator();
-
-  uint32_t Comp = Probability.getDenominator() - Probability.getNumerator();
-  unsigned FUnpredCost = Comp * FCycles;
-  FUnpredCost /= Probability.getDenominator();
-
+  unsigned TUnpredCost = Probability.scale(TCycles);
+  unsigned FUnpredCost = Probability.getCompl().scale(FCycles);
   unsigned UnpredCost = TUnpredCost + FUnpredCost;
   UnpredCost += 1; // The branch itself
   UnpredCost += Subtarget.getMispredictionPenalty() / 10;