http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41082
--- Comment #56 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-11-26 16:20:18 UTC --- That is an unimportant difference. It is fine if a different uid is used, as long as it used consistently through the whole source. You can -fdump-tree-all-nouid and -fdump-rtl-all-nouid alternatively and look for differences in that case.