diff options
| author | Craig Topper <craig.topper@gmail.com> | 2012-04-09 05:55:33 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@gmail.com> | 2012-04-09 05:55:33 +0000 |
| commit | 4b206bdfd0839fe61fda3e0b6955a80646a93977 (patch) | |
| tree | f254db10cd8a384e3cb81c9f50000cfeeb32e459 | |
| parent | 3029a0c56a1e4249746ff6b54d825e88fee6cddf (diff) | |
Optimize code slightly. No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154307 91177308-0d34-0410-b5e6-96231b3b80d8
| -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]); |