[PATCH] D137811: InstCombine: Perform basic isnan combines on llvm.is.fpclass

[Jay Foad via Phabricator via llvm-commits]

foad added a comment.

> is.fpclass(x, qnan|snan) -> fcmp uno x, 0.0
> is.fpclass(nnan x, qnan|snan|other) -> is.fpclass(x, other)

The first one sounds good. Do you have a specific motivation for the second one?


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D137811/new/

https://reviews.llvm.org/D137811