[PATCH] D101840: [InstSimplify] ctlz(x) -> 0 if x is known negative number

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

What's the advantage of doing this in InstSimplfy when InstCombine can already do it via computeKnownBits?


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  https://reviews.llvm.org/D101840/new/

https://reviews.llvm.org/D101840