[PATCH] D143074: [LangRef] improve documentation of SNaN in the default FP environment

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a comment.

In D143074#4125991 <https://reviews.llvm.org/D143074#4125991>, @jyknight wrote:

> Only one final nit: "Floating-point math operations treat all NaNs as quiet NaNs." sounds like they _always_ do, so how about: "Floating-point math operations are permitted to treat all NaNs as if they were quiet NaNs." instead?

Yes, that's a better description. If the optimizer doesn't know if something is a NaN at compile-time, then it's going to pass through to the backend and asm, so the final behavior depends on the target.


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