CodeGen/SelectionDAG/TargetLowering.cpp

376   APInt NewMask = DemandedMask;
391     // just set the NewMask to all bits.
392     NewMask = APInt::getAllOnesValue(BitWidth);
419       if ((LHSZero & NewMask) == (~RHSC->getAPIntValue() & NewMask))
423       if (TLO.ShrinkDemandedConstant(Op, ~LHSZero & NewMask))
427     if (SimplifyDemandedBits(Op.getOperand(1), NewMask, KnownZero,
431     if (SimplifyDemandedBits(Op.getOperand(0), ~KnownZero & NewMask,
438     if ((NewMask & ~KnownZero2 & KnownOne) == (~KnownZero2 & NewMask))
440     if ((NewMask & ~KnownZero & KnownOne2) == (~KnownZero & NewMask))
443     if ((NewMask & (KnownZero|KnownZero2)) == NewMask)
446     if (TLO.ShrinkDemandedConstant(Op, ~KnownZero2 & NewMask))
449     if (TLO.ShrinkDemandedOp(Op, BitWidth, NewMask, dl))
458     if (SimplifyDemandedBits(Op.getOperand(1), NewMask, KnownZero,
462     if (SimplifyDemandedBits(Op.getOperand(0), ~KnownOne & NewMask,
469     if ((NewMask & ~KnownOne2 & KnownZero) == (~KnownOne2 & NewMask))
471     if ((NewMask & ~KnownOne & KnownZero2) == (~KnownOne & NewMask))
475     if ((NewMask & ~KnownZero & KnownOne2) == (~KnownZero & NewMask))
477     if ((NewMask & ~KnownZero2 & KnownOne) == (~KnownZero2 & NewMask))
480     if (TLO.ShrinkDemandedConstant(Op, NewMask))
483     if (TLO.ShrinkDemandedOp(Op, BitWidth, NewMask, dl))
492     if (SimplifyDemandedBits(Op.getOperand(1), NewMask, KnownZero,
496     if (SimplifyDemandedBits(Op.getOperand(0), NewMask, KnownZero2,
503     if ((KnownZero & NewMask) == NewMask)
505     if ((KnownZero2 & NewMask) == NewMask)
508     if (TLO.ShrinkDemandedOp(Op, BitWidth, NewMask, dl))
514     if ((NewMask & ~KnownZero & ~KnownZero2) == 0)
529     if ((NewMask & (KnownZero|KnownOne)) == NewMask) { // all known on one side
532         SDValue ANDC = TLO.DAG.getConstant(~KnownOne & NewMask, VT);
542       APInt Expanded = C->getAPIntValue() | (~NewMask);
553       } else if (TLO.ShrinkDemandedConstant(Op, NewMask)) {
562     if (SimplifyDemandedBits(Op.getOperand(2), NewMask, KnownZero,
565     if (SimplifyDemandedBits(Op.getOperand(1), NewMask, KnownZero2,
572     if (TLO.ShrinkDemandedConstant(Op, NewMask))
580     if (SimplifyDemandedBits(Op.getOperand(3), NewMask, KnownZero,
583     if (SimplifyDemandedBits(Op.getOperand(2), NewMask, KnownZero2,
590     if (TLO.ShrinkDemandedConstant(Op, NewMask))
611         if (ShAmt && (NewMask & APInt::getLowBitsSet(BitWidth, ShAmt)) == 0) {
628       if (SimplifyDemandedBits(InOp, NewMask.lshr(ShAmt),
638         if (ShAmt < InnerBits && NewMask.lshr(InnerBits) == 0 &&
664               NewMask.lshr(InnerBits - InnerShAmt + ShAmt) == 0 &&
665               NewMask.trunc(ShAmt) == 0) {
700         if (ShAmt && (NewMask & APInt::getHighBitsSet(VTSize, ShAmt)) == 0) {
717       if (SimplifyDemandedBits(InOp, (NewMask << ShAmt),
733     if (NewMask == 1)
746       APInt InDemandedMask = (NewMask << ShAmt);
751       if (HighBits.intersects(NewMask))
766       if (KnownZero.intersects(SignBit) || (HighBits & ~NewMask) == HighBits)
771       int Log2 = NewMask.exactLogBase2();
813     if ((NewBits & NewMask) == 0)
821       NewMask;
852     APInt InMask = NewMask.trunc(OperandBitWidth);
856       APInt::getHighBitsSet(BitWidth, BitWidth - OperandBitWidth) & NewMask;
857     if (!NewBits.intersects(NewMask))
876     APInt NewBits   = ~InMask & NewMask;
886     APInt InDemandedBits = InMask & NewMask;
915     APInt InMask = NewMask.trunc(OperandBitWidth);
929     APInt TruncMask = NewMask.zext(OperandBitWidth);
964         if (ShAmt->getZExtValue() < BitWidth && !(HighBits & NewMask)) {
988     if (SimplifyDemandedBits(Op.getOperand(0), ~InMask | NewMask,
993     KnownZero |= ~InMask & NewMask;
1002         NewMask == APInt::getSignBit(Op.getValueType().getSizeInBits()) &&
1028                                         BitWidth - NewMask.countLeadingZeros());
1036     if (TLO.ShrinkDemandedOp(Op, BitWidth, NewMask, dl))
1048   if ((NewMask & (KnownZero|KnownOne)) == NewMask)