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| author | Craig Topper <craig.topper@intel.com> | 2019-09-17 18:19:02 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@intel.com> | 2019-09-17 18:19:02 +0000 |
| commit | b5ffbd0b14529f382f9788abf0dd43b20bcdd6b5 (patch) | |
| tree | a268c41165139e38000c6bb61d3108bdb7e196db /llvm/lib/CodeGen | |
| parent | a5aa3353946d7c51cf086629763a5cb507d4a26f (diff) | |
| download | bcm5719-llvm-b5ffbd0b14529f382f9788abf0dd43b20bcdd6b5.tar.gz bcm5719-llvm-b5ffbd0b14529f382f9788abf0dd43b20bcdd6b5.zip | |
[SimplifyDemandedBits] Use APInt::intersects to instead of ANDing and comparing to 0 separately. NFC
llvm-svn: 372158
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp index 41b3ba1733d..cd7f64efa75 100644 --- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp @@ -1285,7 +1285,7 @@ bool TargetLowering::SimplifyDemandedBits( // out) are never demanded. // TODO - support non-uniform vector amounts. if (Op0.getOpcode() == ISD::SRL) { - if ((DemandedBits & APInt::getLowBitsSet(BitWidth, ShAmt)) == 0) { + if (!DemandedBits.intersects(APInt::getLowBitsSet(BitWidth, ShAmt))) { if (ConstantSDNode *SA2 = isConstOrConstSplat(Op0.getOperand(1), DemandedElts)) { if (SA2->getAPIntValue().ult(BitWidth)) { @@ -1392,7 +1392,8 @@ bool TargetLowering::SimplifyDemandedBits( if (Op0.getOpcode() == ISD::SHL) { if (ConstantSDNode *SA2 = isConstOrConstSplat(Op0.getOperand(1), DemandedElts)) { - if ((DemandedBits & APInt::getHighBitsSet(BitWidth, ShAmt)) == 0) { + if (!DemandedBits.intersects( + APInt::getHighBitsSet(BitWidth, ShAmt))) { if (SA2->getAPIntValue().ult(BitWidth)) { unsigned C1 = SA2->getZExtValue(); unsigned Opc = ISD::SRL; |
