[PATCH] D80432: AMDGPU: Refine rcp/rsq intrinsic folding for modern FP rules

[Jay Foad via Phabricator via llvm-commits]

foad added a comment.

> We have to assume undef could be an snan, which would need quieting so returning qnan is safer than undef.

So you've chosen to optimize assuming that an undef input was a nan. Is that better than assuming it was something more ordinary like 0?


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https://reviews.llvm.org/D80432