diff options
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
| -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 5a933dd8be2..b462aabad2f 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -7144,6 +7144,10 @@ SDValue DAGCombiner::visitFunnelShift(SDNode *N) { if (N0 == N1 && hasOperation(RotOpc, VT)) return DAG.getNode(RotOpc, SDLoc(N), VT, N0, N2); + // Simplify, based on bits shifted out of N0/N1. + if (SimplifyDemandedBits(SDValue(N, 0))) + return SDValue(N, 0); + return SDValue(); } |
