diff options
Diffstat (limited to 'lib/Analysis/ConstantFolding.cpp')
| -rw-r--r-- | lib/Analysis/ConstantFolding.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/Analysis/ConstantFolding.cpp b/lib/Analysis/ConstantFolding.cpp index 96656a3c73..d3596d1c86 100644 --- a/lib/Analysis/ConstantFolding.cpp +++ b/lib/Analysis/ConstantFolding.cpp @@ -1094,6 +1094,13 @@ llvm::ConstantFoldCall(Function *F, if (!Ty->isFloatTy() && !Ty->isDoubleTy()) return 0; + + /// We only fold functions with finite arguments. Folding NaN and inf is + /// likely to be aborted with an exception anyway, and some host libms + /// have known errors raising exceptions. + if (Op->getValueAPF().isNaN() || Op->getValueAPF().isInfinity()) + return 0; + /// Currently APFloat versions of these functions do not exist, so we use /// the host native double versions. Float versions are not called /// directly but for all these it is true (float)(f((double)arg)) == |