diff options
| -rw-r--r-- | lib/VMCore/ConstantFold.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/VMCore/ConstantFold.cpp b/lib/VMCore/ConstantFold.cpp index 4983a036be..06dc9dc89f 100644 --- a/lib/VMCore/ConstantFold.cpp +++ b/lib/VMCore/ConstantFold.cpp @@ -175,7 +175,9 @@ Constant *llvm::ConstantFoldCastInstruction(unsigned opc, const Constant *V, if (isa<UndefValue>(V)) { // zext(undef) = 0, because the top bits will be zero. // sext(undef) = 0, because the top bits will all be the same. - if (opc == Instruction::ZExt || opc == Instruction::SExt) + // [us]itofp(undef) = 0, because the result value is bounded. + if (opc == Instruction::ZExt || opc == Instruction::SExt || + opc == Instruction::UIToFP || opc == Instruction::SIToFP) return Constant::getNullValue(DestTy); return UndefValue::get(DestTy); } |