[PATCH] D142429: [InstCombine] Use `computeKnownBits` in `SimplifyDemandedUseBits` for and/xor/or

[Nikita Popov via Phabricator via llvm-commits]

nikic requested changes to this revision.
nikic added a comment.
This revision now requires changes to proceed.

This is going to unnecessarily recompute known bits we already have. Please go with the helpers instead. Doing a recursive computeKnownBits() call for an operand we didn't check yet is fine, but we shouldn't recompute the known bits we already have.


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  https://reviews.llvm.org/D142429/new/

https://reviews.llvm.org/D142429