KnownZero = KnownZero.trunc(SrcBitWidth);
KnownOne = KnownOne.trunc(SrcBitWidth);
computeKnownBits(I->getOperand(0), KnownZero, KnownOne, Depth + 1, Q);
- KnownZero = KnownZero.zext(BitWidth);
- KnownOne = KnownOne.zext(BitWidth);
-
// If the sign bit of the input is known set or clear, then we know the
// top bits of the result.
- if (KnownZero[SrcBitWidth-1]) // Input sign bit known zero
- KnownZero.setBitsFrom(SrcBitWidth);
- else if (KnownOne[SrcBitWidth-1]) // Input sign bit known set
- KnownOne.setBitsFrom(SrcBitWidth);
+ KnownZero = KnownZero.sext(BitWidth);
+ KnownOne = KnownOne.sext(BitWidth);
break;
}
case Instruction::Shl: {