[Bug c++/67461] Multiple atomic stores generate a StoreLoad barrier between each one, not just at the end

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67461

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Hmm, I think there needs to be a barrier between each store as each store needs
to be observed by the other threads.