[PATCH] D80437: [CodeGen] Let computeKnownBits do something sensible for scalable vectors

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

The code looks right.

For both this and the SimplifyDemandedBits/VectorElts patches, I'm not sure what we want to do about testing.  Currently, I assume some optimizations "work", and this breaks them.  And probably we do some incorrect optimizations.  It would be nice if we could have at least a little test coverage showing these changes have some effect.


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  https://reviews.llvm.org/D80437/new/

https://reviews.llvm.org/D80437