http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53902
--- Comment #2 from T.J. Yang <tjyang2001 at gmail dot com> 2012-08-09 10:58:54 UTC --- Found following URLs could be helpful to resolve the issue. http://echelog.com/logs/browse/oi-dev/1315000800. https://github.com/richlowe/gcc/commit/610511a2a04185795a2e0d08ff25369126719346