http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53083
--- Comment #4 from Uros Bizjak <ubizjak at gmail dot com> 2012-04-23 14:50:54 UTC --- Unfortunately, this is a runtime failure, so we will also need a runtime testcase (probably minimized) that fails when compiled with options that expose the bug. In comment #8 of the linked bugreport, you have testing failures, so this is a good starting point to locate the problem.