[PATCH] D122194: [SelectionDAG] Store LeadingZero count in LiveOutInfo instead of KnownBits.

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

In D122194#3399998 <https://reviews.llvm.org/D122194#3399998>, @craig.topper wrote:

> In D122194#3399974 <https://reviews.llvm.org/D122194#3399974>, @RKSimon wrote:
>
>> Alignment, one bit and known negative values would all be nice to have - I'm just not sure if they'd make a huge difference.
>
> For "one bit" would we have to call isKnownToBeAPowerOfTwo in addition to computeKnownBits?

one bit I meant KnownBits::countMaxPopulation() == 1 (i.e. all but one bit is known zero - it might be pow2 or zero)


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https://reviews.llvm.org/D122194