[Bug target/52941] SH Target: Add support for movco.l / movli.l atomics on SH4A

[olegendo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52941

--- Comment #15 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #14)
> Hm, maybe it would make sense to add a target specific option to allow
> setting set the minimum atomic variable alignment (MINIMUM_ATOMIC_ALIGNMENT
> macro).

The macro MINIMUM_ATOMIC_ALIGNMENT is a bit misleading.  It's used only for
ADA.  
A new target hook TARGET_ATOMIC_ALIGN_FOR_MODE has been added recently, which
serves the purpose.