diff options
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index 446067aeb8d..93ca120e3cc 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -2422,7 +2422,8 @@ void SelectionDAG::computeKnownBits(SDValue Op, APInt &KnownZero, unsigned NLZ = (CLHS->getAPIntValue()+1).countLeadingZeros(); // NLZ can't be BitWidth with no sign bit APInt MaskV = APInt::getHighBitsSet(BitWidth, NLZ+1); - computeKnownBits(Op.getOperand(1), KnownZero2, KnownOne2, Depth+1); + computeKnownBits(Op.getOperand(1), KnownZero2, KnownOne2, DemandedElts, + Depth + 1); // If all of the MaskV bits are known to be zero, then we know the // output top bits are zero, because we now know that the output is @@ -2445,11 +2446,13 @@ void SelectionDAG::computeKnownBits(SDValue Op, APInt &KnownZero, // known to be clear. For example, if one input has the top 10 bits clear // and the other has the top 8 bits clear, we know the top 7 bits of the // output must be clear. - computeKnownBits(Op.getOperand(0), KnownZero2, KnownOne2, Depth+1); + computeKnownBits(Op.getOperand(0), KnownZero2, KnownOne2, DemandedElts, + Depth + 1); unsigned KnownZeroHigh = KnownZero2.countLeadingOnes(); unsigned KnownZeroLow = KnownZero2.countTrailingOnes(); - computeKnownBits(Op.getOperand(1), KnownZero2, KnownOne2, Depth+1); + computeKnownBits(Op.getOperand(1), KnownZero2, KnownOne2, DemandedElts, + Depth + 1); KnownZeroHigh = std::min(KnownZeroHigh, KnownZero2.countLeadingOnes()); KnownZeroLow = std::min(KnownZeroLow, |
