diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
-rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 8f4da5a567..da9559ee87 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -4402,6 +4402,13 @@ SDValue DAGCombiner::visitVSELECT(SDNode *N) { return DAG.getNode(ISD::CONCAT_VECTORS, DL, VT, Lo, Hi); } + // Fold (vselect (build_vector all_ones), N1, N2) -> N1 + if (ISD::isBuildVectorAllOnes(N0.getNode())) + return N1; + // Fold (vselect (build_vector all_zeros), N1, N2) -> N2 + if (ISD::isBuildVectorAllZeros(N0.getNode())) + return N2; + return SDValue(); } |