diff options
| -rw-r--r-- | lib/VMCore/ConstantFold.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/lib/VMCore/ConstantFold.cpp b/lib/VMCore/ConstantFold.cpp index 36bd4aba4b..f73e7a76d1 100644 --- a/lib/VMCore/ConstantFold.cpp +++ b/lib/VMCore/ConstantFold.cpp @@ -794,15 +794,17 @@ Constant *llvm::ConstantFoldInsertElementInstruction(Constant *Val, Constant *llvm::ConstantFoldShuffleVectorInstruction(Constant *V1, Constant *V2, Constant *Mask) { + unsigned MaskNumElts = Mask->getType()->getVectorNumElements(); + Type *EltTy = V1->getType()->getVectorElementType(); + // Undefined shuffle mask -> undefined value. - if (isa<UndefValue>(Mask)) return UndefValue::get(V1->getType()); + if (isa<UndefValue>(Mask)) + return UndefValue::get(VectorType::get(EltTy, MaskNumElts)); // Don't break the bitcode reader hack. if (isa<ConstantExpr>(Mask)) return 0; - unsigned MaskNumElts = Mask->getType()->getVectorNumElements(); unsigned SrcNumElts = V1->getType()->getVectorNumElements(); - Type *EltTy = V1->getType()->getVectorElementType(); // Loop over the shuffle mask, evaluating each element. SmallVector<Constant*, 32> Result; |