diff options
Diffstat (limited to 'llvm/lib/Analysis/InstructionSimplify.cpp')
| -rw-r--r-- | llvm/lib/Analysis/InstructionSimplify.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/Analysis/InstructionSimplify.cpp b/llvm/lib/Analysis/InstructionSimplify.cpp index 800382079c1..d753c47ef6d 100644 --- a/llvm/lib/Analysis/InstructionSimplify.cpp +++ b/llvm/lib/Analysis/InstructionSimplify.cpp @@ -4049,6 +4049,9 @@ static Value *foldIdentityShuffles(int DestElt, Value *Op0, Value *Op1, static Value *SimplifyShuffleVectorInst(Value *Op0, Value *Op1, Constant *Mask, Type *RetTy, const SimplifyQuery &Q, unsigned MaxRecurse) { + if (isa<UndefValue>(Mask)) + return UndefValue::get(RetTy); + Type *InVecTy = Op0->getType(); unsigned MaskNumElts = Mask->getType()->getVectorNumElements(); unsigned InVecNumElts = InVecTy->getVectorNumElements(); |
