diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineVectorOps.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineVectorOps.cpp b/lib/Transforms/InstCombine/InstCombineVectorOps.cpp index 4f71db1a4b..bbfad8693e 100644 --- a/lib/Transforms/InstCombine/InstCombineVectorOps.cpp +++ b/lib/Transforms/InstCombine/InstCombineVectorOps.cpp @@ -336,6 +336,10 @@ static Value *CollectShuffleElements(Value *V, SmallVectorImpl<Constant*> &Mask, if (VecOp == RHS) { Value *V = CollectShuffleElements(EI->getOperand(0), Mask, RHS); + // Update Mask to reflect that `ScalarOp' has been inserted at + // position `InsertedIdx' within the vector returned by IEI. + Mask[InsertedIdx % NumElts] = Mask[ExtractedIdx]; + // Everything but the extracted element is replaced with the RHS. for (unsigned i = 0; i != NumElts; ++i) { if (i != InsertedIdx) |