[PATCH] D43142: Experimental pass to convert all floating point operations to the equivalent constrained intrinsics

[Cameron McInally via Phabricator via llvm-commits]

cameron.mcinally added a comment.

In https://reviews.llvm.org/D43142#1285692, @kpn wrote:

> Hmmm. A clang option to turn on FENV_ACCESS for entire compilations would work around this issue. So the behavior you are describing here would work for me.


This is interesting. I was thinking the same thing (and maybe even changing the Standard to match).

I'm struggling to find a good use case for dynamically changing FENV_ACCESS in a translation unit. My current belief is that if a user wants to run with traps, they would want trap-safe code everywhere. If that was the case, the user would still be able to toggle signals with the feenableexcept() and friends functions (similar for rounding mode too).


https://reviews.llvm.org/D43142