http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56560
--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> 2013-03-11 19:34:29 UTC --- Created attachment 29645 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29645 A patch This patch adds expand_args to track library calls to expend arguments. We add vzeroupper when expand_args == 1, which indicates we are expanding the actual function.
