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| author | Sanjay Patel <spatel@rotateright.com> | 2016-10-30 18:13:30 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2016-10-30 18:13:30 +0000 |
| commit | 13aee345cae5ba7016d32c23685910607698c404 (patch) | |
| tree | 45e5d6064e4f28060c60119820e6222bc15e5b58 /llvm/lib | |
| parent | 8a5f9810a07077a772c0816e07d7f4b9ee41b99c (diff) | |
| download | bcm5719-llvm-13aee345cae5ba7016d32c23685910607698c404.tar.gz bcm5719-llvm-13aee345cae5ba7016d32c23685910607698c404.zip | |
[DAG] x & x --> x
llvm-svn: 285521
Diffstat (limited to 'llvm/lib')
| -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 f5aeb8cb533..e78a3562a05 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -3134,6 +3134,10 @@ SDValue DAGCombiner::visitAND(SDNode *N) { SDValue N1 = N->getOperand(1); EVT VT = N1.getValueType(); + // x & x --> x + if (N0 == N1) + return N0; + // fold vector ops if (VT.isVector()) { if (SDValue FoldedVOp = SimplifyVBinOp(N)) |
