diff options
Diffstat (limited to 'lib/VMCore/ConstantFold.cpp')
| -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 9c2919ea1d..f1b97dfce1 100644 --- a/lib/VMCore/ConstantFold.cpp +++ b/lib/VMCore/ConstantFold.cpp @@ -787,6 +787,9 @@ Constant *llvm::ConstantFoldShuffleVectorInstruction(Constant *V1, // Undefined shuffle mask -> undefined value. if (isa<UndefValue>(Mask)) return UndefValue::get(V1->getType()); + // 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(); |