http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49777
--- Comment #5 from kun.he <hekun_hekun at 163 dot com> 2011-10-15 01:47:14 UTC --- Thanks Paolo & Nick, When I replace gcc-4.5.1 by Gcc-linaro-4.5-2011.06, the issue disappeared. And I found patch http://bazaar.launchpad.net/~linaro-toolchain-dev/gcc-linaro/4.5/revision/99352