http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46734
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> 2010-12-05 16:47:26 UTC --- It was caused by revision 154413: http://gcc.gnu.org/ml/gcc-cvs/2009-11/msg00634.html and fixed by revision 161655: http://gcc.gnu.org/ml/gcc-cvs/2010-07/msg00006.html