------- Comment #16 from hjl dot tools at gmail dot com 2010-09-16 13:59 ------- (In reply to comment #13)
> With that patch the assignment generated from memcpy doesn't need more > that int alignment, but still cfgexpand.c sets DECL_ALIGN of the > decl to 128 so expand uses aligned instructions. > > cfgexpand.c should not increase alignment and not set 'needs stack > alignment' then, based on your comment #10. So this _is_ about > stack alignment (but maybe not exclusively). > When we do float d[4]; __m128 *p = (__m128 *) &d; all bets are off. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45678
