https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111870
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> --- If you don't use the return value of atomic_fetch_or_explicit, there is no need for a compare-and-exchange (swap) loop. If you need the fetch part, the compare-and-exchange loop needs to be used as `lock or` does not provide that. I still don't understand what exactly you are saying is wrong except you want to use `lock or` in both cases but you can't since that will not get the right atomic fetch part of the atomic_fetch_or.
