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| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2017-05-10 12:34:27 +0000 |
|---|---|---|
| committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2017-05-10 12:34:27 +0000 |
| commit | c29af824bff54622ee15364d30048c1a7c8d4715 (patch) | |
| tree | c25a528c601f0516f578c13ee5a09f075a91602e /llvm/lib/CodeGen | |
| parent | f3bd8ddedb7f5641d16b15af8b7b327ae5cbf10b (diff) | |
| download | bcm5719-llvm-c29af824bff54622ee15364d30048c1a7c8d4715.tar.gz bcm5719-llvm-c29af824bff54622ee15364d30048c1a7c8d4715.zip | |
[DAGCombiner] Add vector support to fold (shl/srl 0, x) -> 0
llvm-svn: 302641
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 14b7adfea62..2436a81259f 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -5331,7 +5331,7 @@ SDValue DAGCombiner::visitSHL(SDNode *N) { if (N0C && N1C && !N1C->isOpaque()) return DAG.FoldConstantArithmetic(ISD::SHL, SDLoc(N), VT, N0C, N1C); // fold (shl 0, x) -> 0 - if (isNullConstant(N0)) + if (isNullConstantOrNullSplatConstant(N0)) return N0; // fold (shl x, c >= size(x)) -> undef if (N1C && N1C->getAPIntValue().uge(OpSizeInBits)) @@ -5714,7 +5714,7 @@ SDValue DAGCombiner::visitSRL(SDNode *N) { if (N0C && N1C && !N1C->isOpaque()) return DAG.FoldConstantArithmetic(ISD::SRL, SDLoc(N), VT, N0C, N1C); // fold (srl 0, x) -> 0 - if (isNullConstant(N0)) + if (isNullConstantOrNullSplatConstant(N0)) return N0; // fold (srl x, c >= size(x)) -> undef if (N1C && N1C->getAPIntValue().uge(OpSizeInBits)) |
