diff options
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp index 94170420d0..f3948f9ee8 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp @@ -2423,7 +2423,8 @@ void SelectionDAGLowering::visitShuffleVector(User &I) { StartIdx[Input] = 0; } else { StartIdx[Input] = (MinRange[Input]/MaskNumElts)*MaskNumElts; - if (MaxRange[Input] - StartIdx[Input] < MaskNumElts) + if (MaxRange[Input] - StartIdx[Input] < MaskNumElts && + StartIdx[Input] + MaskNumElts < SrcNumElts) RangeUse[Input] = 1; // Extract from a multiple of the mask length. } } |