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| author | Daniel Sanders <daniel.sanders@imgtec.com> | 2013-11-11 17:23:41 +0000 |
|---|---|---|
| committer | Daniel Sanders <daniel.sanders@imgtec.com> | 2013-11-11 17:23:41 +0000 |
| commit | 028e4d27b1afc62be0687e9c3b57992c36852938 (patch) | |
| tree | 3622a9691dfecf043d2aa73aecad098ebc7c0275 /lib/CodeGen | |
| parent | 12f06e1e0936b01bf329615ec4f0f5488c98c0dd (diff) | |
| download | external_llvm-028e4d27b1afc62be0687e9c3b57992c36852938.zip external_llvm-028e4d27b1afc62be0687e9c3b57992c36852938.tar.gz external_llvm-028e4d27b1afc62be0687e9c3b57992c36852938.tar.bz2 | |
Vector forms of SHL, SRA, and SRL can be constant folded using SimplifyVBinOp too
Reviewers: dsanders
Reviewed By: dsanders
CC: llvm-commits, nadav
Differential Revision: http://llvm-reviews.chandlerc.com/D1958
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194393 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index de0f6ce..7343236 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -3691,6 +3691,12 @@ SDValue DAGCombiner::visitSHL(SDNode *N) { EVT VT = N0.getValueType(); unsigned OpSizeInBits = VT.getScalarType().getSizeInBits(); + // fold vector ops + if (VT.isVector()) { + SDValue FoldedVOp = SimplifyVBinOp(N); + if (FoldedVOp.getNode()) return FoldedVOp; + } + // fold (shl c1, c2) -> c1<<c2 if (N0C && N1C) return DAG.FoldConstantArithmetic(ISD::SHL, VT, N0C, N1C); @@ -3842,6 +3848,12 @@ SDValue DAGCombiner::visitSRA(SDNode *N) { EVT VT = N0.getValueType(); unsigned OpSizeInBits = VT.getScalarType().getSizeInBits(); + // fold vector ops + if (VT.isVector()) { + SDValue FoldedVOp = SimplifyVBinOp(N); + if (FoldedVOp.getNode()) return FoldedVOp; + } + // fold (sra c1, c2) -> (sra c1, c2) if (N0C && N1C) return DAG.FoldConstantArithmetic(ISD::SRA, VT, N0C, N1C); @@ -3987,6 +3999,12 @@ SDValue DAGCombiner::visitSRL(SDNode *N) { EVT VT = N0.getValueType(); unsigned OpSizeInBits = VT.getScalarType().getSizeInBits(); + // fold vector ops + if (VT.isVector()) { + SDValue FoldedVOp = SimplifyVBinOp(N); + if (FoldedVOp.getNode()) return FoldedVOp; + } + // fold (srl c1, c2) -> c1 >>u c2 if (N0C && N1C) return DAG.FoldConstantArithmetic(ISD::SRL, VT, N0C, N1C); |