[PATCH] D104408: AMDGPU/GlobalISel: Treat undef as KnownNeverNaN

[Jay Foad via Phabricator via llvm-commits]

foad added a comment.

`matchUnaryPredicate` already has an `AllowUndefs` argument, so you could do the same.

Incidentally ValueTracking's isKnownNeverNaN treats undef as not-nan, but only when it appears as an element of a vector constant.


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  https://reviews.llvm.org/D104408/new/

https://reviews.llvm.org/D104408