[libcxx-commits] [clang] [libcxx] [Clang] Allow __builtin_fma/fmaf/fmal to be used in a constant expression (PR #158048)

[Erich Keane via libcxx-commits]

erichkeane wrote:

> > https://releases.llvm.org/21.1.0/tools/clang/docs/UsersManual.html#cmdoption-f-no-rounding-math. @AaronBallman, do you know if the design decision has been made and whether we have documented it? Relevant prior discussion here: https://discourse.llvm.org/t/rfc-calling-functions-if-pragma-fenv-round-is-present/79372.
> 
> Aaron is away this month. Maybe @jcranmer-intel @rnk @erichkeane can help

I don't have a good feel for that, there doesn't seem to be an obvious answer to me. Should we have an RFC? @andykaylor is on vacation this week, but is also very familiar with these pragmas.

https://github.com/llvm/llvm-project/pull/158048