[PATCH] D47963: [LangRef] Clarify that nnan and ninf don't produce undef or poison.

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a subscriber: sunfish.
efriedma added a comment.

> Only if the fcmp is marked with nnan or ninf right?

Yes, but it's inconvenient in C because fast-math flags work on a per-file basis.

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If the consensus is that we need to produce poison for nnan/ninf instead of an unspecified value, I can change that.  I guess it allows more aggressive fcmp transforms in some cases?


Repository:
  rL LLVM

https://reviews.llvm.org/D47963