diff options
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 036f0392a0..a910e34579 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -7723,12 +7723,13 @@ SDValue DAGCombiner::visitVECTOR_SHUFFLE(SDNode *N) { SmallVector<int, 8> NewMask; for (unsigned i = 0; i != NumElts; ++i) { int Idx = SVN->getMaskElt(i); - if (Idx < 0) - NewMask.push_back(Idx); - else if (Idx < (int)NumElts) - NewMask.push_back(Idx + NumElts); - else - NewMask.push_back(Idx - NumElts); + if (Idx >= 0) { + if (Idx < (int)NumElts) + Idx += NumElts; + else + Idx -= NumElts; + } + NewMask.push_back(Idx); } return DAG.getVectorShuffle(VT, N->getDebugLoc(), N1, DAG.getUNDEF(VT), &NewMask[0]); |