http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55092
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> 2012-10-26 22:56:55 UTC --- The testcase is compiled with -O2, not -O0.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55092
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> 2012-10-26 22:56:55 UTC --- The testcase is compiled with -O2, not -O0.