[PATCH] D150922: [KnownBits] Return `0` for poison {s,u}div inputs

[Nikita Popov via Phabricator via llvm-commits]

nikic added a comment.

IMHO we shouldn't go of the way to handle such cases -- if we need to handle this for other reasons (e.g. for shift amounts, or for conflicts) that's one thing, but explicitly checking for poison result for known constant cases is pretty pointless -- those will get folded to actual poison values by code that can do so.


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  https://reviews.llvm.org/D150922/new/

https://reviews.llvm.org/D150922