http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49068
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-05-19 18:17:17 UTC --- It does say which argument too: "argument 6".
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49068
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-05-19 18:17:17 UTC --- It does say which argument too: "argument 6".