diff options
Diffstat (limited to 'lib/Target/ARM/ARMISelLowering.cpp')
| -rw-r--r-- | lib/Target/ARM/ARMISelLowering.cpp | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp index 0091df7..444e30e 100644 --- a/lib/Target/ARM/ARMISelLowering.cpp +++ b/lib/Target/ARM/ARMISelLowering.cpp @@ -2403,8 +2403,9 @@ ARMTargetLowering::OptimizeVFPBrcond(SDValue Op, SelectionDAG &DAG) const { bool SeenZero = false; if (canChangeToInt(LHS, SeenZero, Subtarget) && canChangeToInt(RHS, SeenZero, Subtarget) && - // If one of the operand is zero, it's safe to ignore the NaN case. - (FiniteOnlyFPMath() || SeenZero)) { + // If one of the operand is zero, it's safe to ignore the NaN case since + // we only care about equality comparisons. + (SeenZero || (DAG.isKnownNeverNaN(LHS) && DAG.isKnownNeverNaN(RHS)))) { // If unsafe fp math optimization is enabled and there are no othter uses of // the CMP operands, and the condition code is EQ oe NE, we can optimize it // to an integer comparison. @@ -4561,7 +4562,7 @@ static SDValue PerformExtendCombine(SDNode *N, SelectionDAG &DAG, static SDValue PerformSELECT_CCCombine(SDNode *N, SelectionDAG &DAG, const ARMSubtarget *ST) { // If the target supports NEON, try to use vmax/vmin instructions for f32 - // selects like "x < y ? x : y". Unless the FiniteOnlyFPMath option is set, + // selects like "x < y ? x : y". Unless the NoNaNsFPMath option is set, // be careful about NaNs: NEON's vmax/vmin return NaN if either operand is // a NaN; only do the transformation when it matches that behavior. |