diff options
Diffstat (limited to 'llvm/lib/Transforms/Utils/SimplifyCFG.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/SimplifyCFG.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp index ab1a474..79d4857 100644 --- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp @@ -2425,7 +2425,12 @@ static bool FoldTwoEntryPHINode(PHINode *PN, const TargetTransformInfo &TTI, if (IfBlock2) hoistAllInstructionsInto(DomBlock, InsertPt, IfBlock2); + // Propagate fast-math-flags from phi nodes to replacement selects. + IRBuilder<>::FastMathFlagGuard FMFGuard(Builder); while (PHINode *PN = dyn_cast<PHINode>(BB->begin())) { + if (isa<FPMathOperator>(PN)) + Builder.setFastMathFlags(PN->getFastMathFlags()); + // Change the PHI node into a select instruction. Value *TrueVal = PN->getIncomingValue(PN->getIncomingBlock(0) == IfFalse); Value *FalseVal = PN->getIncomingValue(PN->getIncomingBlock(0) == IfTrue); |