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| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2015-06-13 14:08:15 +0000 |
|---|---|---|
| committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2015-06-13 14:08:15 +0000 |
| commit | 011381d48b1a5d2bd85c54b697f902f958c181c2 (patch) | |
| tree | f3c491c61da3fdef67f72ba7efb2c41c1f28a67d /llvm/lib/CodeGen/SelectionDAG | |
| parent | 096cccd01a9e66bd43282e406eb0268716971546 (diff) | |
| download | bcm5719-llvm-011381d48b1a5d2bd85c54b697f902f958c181c2.tar.gz bcm5719-llvm-011381d48b1a5d2bd85c54b697f902f958c181c2.zip | |
[DAGCombiner] Added BSWAP vector constant folding support.
llvm-svn: 239675
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 12 | ||||
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 1 |
2 files changed, 13 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 35943351665..1e33f1ed10f 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -255,6 +255,7 @@ namespace { SDValue visitSRA(SDNode *N); SDValue visitSRL(SDNode *N); SDValue visitRotate(SDNode *N); + SDValue visitBSWAP(SDNode *N); SDValue visitCTLZ(SDNode *N); SDValue visitCTLZ_ZERO_UNDEF(SDNode *N); SDValue visitCTTZ(SDNode *N); @@ -1335,6 +1336,7 @@ SDValue DAGCombiner::visit(SDNode *N) { case ISD::SRL: return visitSRL(N); case ISD::ROTR: case ISD::ROTL: return visitRotate(N); + case ISD::BSWAP: return visitBSWAP(N); case ISD::CTLZ: return visitCTLZ(N); case ISD::CTLZ_ZERO_UNDEF: return visitCTLZ_ZERO_UNDEF(N); case ISD::CTTZ: return visitCTTZ(N); @@ -4764,6 +4766,16 @@ SDValue DAGCombiner::visitSRL(SDNode *N) { return SDValue(); } +SDValue DAGCombiner::visitBSWAP(SDNode *N) { + SDValue N0 = N->getOperand(0); + EVT VT = N->getValueType(0); + + // fold (bswap c1) -> c2 + if (isConstantIntBuildVectorOrConstantInt(N0)) + return DAG.getNode(ISD::BSWAP, SDLoc(N), VT, N0); + return SDValue(); +} + SDValue DAGCombiner::visitCTLZ(SDNode *N) { SDValue N0 = N->getOperand(0); EVT VT = N->getValueType(0); diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index cf51e756d84..27fa3d2b1e3 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -2932,6 +2932,7 @@ SDValue SelectionDAG::getNode(unsigned Opcode, SDLoc DL, case ISD::TRUNCATE: case ISD::UINT_TO_FP: case ISD::SINT_TO_FP: + case ISD::BSWAP: case ISD::CTLZ: case ISD::CTLZ_ZERO_UNDEF: case ISD::CTTZ: |
