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| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2017-01-16 14:49:26 +0000 |
|---|---|---|
| committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2017-01-16 14:49:26 +0000 |
| commit | 3e91519a1c21ac9343483ff2a3294ee2f5cd7142 (patch) | |
| tree | dbe8fb11bdffb131513cf4ee26fbfb8e40648b36 /llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | |
| parent | 7630b8c5ee3109986a013b71f7b9352b23101aad (diff) | |
| download | bcm5719-llvm-3e91519a1c21ac9343483ff2a3294ee2f5cd7142.tar.gz bcm5719-llvm-3e91519a1c21ac9343483ff2a3294ee2f5cd7142.zip | |
[SelectionDAG] Add knownbits support for BITREVERSE
llvm-svn: 292130
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index 6b2123f1940..24aed22e228 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -2673,6 +2673,13 @@ void SelectionDAG::computeKnownBits(SDValue Op, APInt &KnownZero, } break; } + case ISD::BITREVERSE: { + computeKnownBits(Op.getOperand(0), KnownZero2, KnownOne2, DemandedElts, + Depth + 1); + KnownZero = KnownZero2.reverseBits(); + KnownOne = KnownOne2.reverseBits(); + break; + } case ISD::BSWAP: { computeKnownBits(Op.getOperand(0), KnownZero2, KnownOne2, DemandedElts, Depth + 1); |
