diff options
| -rw-r--r-- | lib/VMCore/ConstantFold.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/VMCore/ConstantFold.cpp b/lib/VMCore/ConstantFold.cpp index d63fb6b2db..94c8651609 100644 --- a/lib/VMCore/ConstantFold.cpp +++ b/lib/VMCore/ConstantFold.cpp @@ -836,6 +836,9 @@ Constant *llvm::ConstantFoldExtractElementInstruction(const Constant *Val, const Constant *Idx) { if (isa<UndefValue>(Val)) // ee(undef, x) -> undef return UndefValue::get(cast<PackedType>(Val->getType())->getElementType()); + if (Val->isNullValue()) // ee(zero, x) -> zero + return Constant::getNullValue( + cast<PackedType>(Val->getType())->getElementType()); if (const ConstantPacked *CVal = dyn_cast<ConstantPacked>(Val)) { if (const ConstantUInt *CIdx = dyn_cast<ConstantUInt>(Idx)) { |