http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54795
--- Comment #11 from H.J. Lu <hjl.tools at gmail dot com> 2012-11-17 17:30:25 UTC --- It can be reproduced with LTO bootstrap on hjl/valgrind branch at http://gcc.gnu.org/git/?p=gcc.git;a=summary with --enable-checking=valgrind.