http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52294
--- Comment #4 from Steven Bosscher <steven at gcc dot gnu.org> 2012-02-18 12:36:29 UTC --- (If the pattern of comment #3 is to blame, then this goes back all the way to the check-in of that pattern, see http://gcc.gnu.org/viewcvs?view=revision&revision=33028)