diff options
Diffstat (limited to 'lib/VMCore/ConstantFold.cpp')
| -rw-r--r-- | lib/VMCore/ConstantFold.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/VMCore/ConstantFold.cpp b/lib/VMCore/ConstantFold.cpp index 47c693b030..458f224575 100644 --- a/lib/VMCore/ConstantFold.cpp +++ b/lib/VMCore/ConstantFold.cpp @@ -761,6 +761,10 @@ Constant *llvm::ConstantFoldExtractElementInstruction(Constant *Val, if (ConstantVector *CVal = dyn_cast<ConstantVector>(Val)) { if (ConstantInt *CIdx = dyn_cast<ConstantInt>(Idx)) { + uint64_t Index = CIdx->getZExtValue(); + if (Index >= CVal->getNumOperands()) + // ee({w,x,y,z}, wrong_value) -> w (an arbitrary value). + return CVal->getOperand(0); return CVal->getOperand(CIdx->getZExtValue()); } else if (isa<UndefValue>(Idx)) { // ee({w,x,y,z}, undef) -> w (an arbitrary value). |