diff options
Diffstat (limited to 'llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp')
| -rw-r--r-- | llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp b/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp index 9a904cd4211..6034b4a114e 100644 --- a/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp +++ b/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp @@ -1201,7 +1201,8 @@ bool ARMBaseInstrInfo::isSchedulingBoundary(const MachineInstr *MI, bool ARMBaseInstrInfo::isProfitableToIfCvt(MachineBasicBlock &MBB, unsigned NumInstrs, - float Probability) const { + float Probability, + float Confidence) const { if (!NumInstrs) return false; @@ -1218,7 +1219,7 @@ bool ARMBaseInstrInfo::isProfitableToIfCvt(MachineBasicBlock &MBB, // Attempt to estimate the relative costs of predication versus branching. float UnpredCost = Probability * NumInstrs; UnpredCost += 1.0; // The branch itself - UnpredCost += 0.1 * Subtarget.getMispredictionPenalty(); + UnpredCost += (1.0 - Confidence) * Subtarget.getMispredictionPenalty(); float PredCost = NumInstrs; @@ -1229,7 +1230,7 @@ bool ARMBaseInstrInfo::isProfitableToIfCvt(MachineBasicBlock &MBB, bool ARMBaseInstrInfo:: isProfitableToIfCvt(MachineBasicBlock &TMBB, unsigned NumT, MachineBasicBlock &FMBB, unsigned NumF, - float Probability) const { + float Probability, float Confidence) const { // Use old-style if-conversion heuristics if (OldARMIfCvt) { return NumT && NumF && NumT <= 2 && NumF <= 2; @@ -1241,7 +1242,7 @@ isProfitableToIfCvt(MachineBasicBlock &TMBB, unsigned NumT, // Attempt to estimate the relative costs of predication versus branching. float UnpredCost = Probability * NumT + (1.0 - Probability) * NumF; UnpredCost += 1.0; // The branch itself - UnpredCost += 0.1 * Subtarget.getMispredictionPenalty(); + UnpredCost += (1.0 - Confidence) * Subtarget.getMispredictionPenalty(); float PredCost = NumT + NumF; |
