http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52941
--- Comment #14 from Oleg Endo <olegendo at gcc dot gnu.org> --- 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). If set to 32 bit, movco.l and movli.l insns can be used more efficiently for variables < 32 bit. The existing '-matomic-model' option could be extended with an optional parameter 'align=' which would default to '1'.
