http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20020
--- Comment #31 from Chip Salzenberg <chip at pobox dot com> 2012-08-14 22:46:12 UTC --- I've tested the attached patch, and I find that it succeeds in preventing the current missed optimizations in structs passed by value from affecting 128-bit structs. IOW: Works for me. Thanks!
