Commit 47f99d2c authored by Simon Pilgrim's avatar Simon Pilgrim
Browse files

[SelectionDAG] GetDemandedBits - remove ANY_EXTEND handling 

Rely on SimplifyMultipleUseDemandedBits fallback instead.
parent b065902e

llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp

+0 −13
Original line number Diff line number Diff line
@@ -2226,19 +2226,6 @@ SDValue SelectionDAG::GetDemandedBits(SDValue V, const APInt &DemandedBits, 
    }

    break;

  }

  case ISD::ANY_EXTEND: {

    SDValue Src = V.getOperand(0);

    unsigned SrcBitWidth = Src.getScalarValueSizeInBits();

    // Being conservative here - only peek through if we only demand bits in the

    // non-extended source (even though the extended bits are technically

    // undef).

    if (DemandedBits.getActiveBits() > SrcBitWidth)

      break;

    APInt SrcDemandedBits = DemandedBits.trunc(SrcBitWidth);

    if (SDValue DemandedSrc = GetDemandedBits(Src, SrcDemandedBits))

      return getNode(ISD::ANY_EXTEND, SDLoc(V), V.getValueType(), DemandedSrc);

    break;

  }

  }

  return SDValue();

}