diff options
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index e3cab19733b..49e64903f46 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -5774,6 +5774,10 @@ SDValue DAGCombiner::visitVSELECT(SDNode *N) { SDValue N2 = N->getOperand(2); SDLoc DL(N); + // fold (vselect C, X, X) -> X + if (N1 == N2) + return N1; + // Canonicalize integer abs. // vselect (setg[te] X, 0), X, -X -> // vselect (setgt X, -1), X, -X -> |
