http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55030
--- Comment #11 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2013-02-16 09:44:31 UTC --- While we are at it, we could also revert the dse.c and cselib.c hunks of the blockage patch, which weren't strictly necessary. Jakub was really concerned about their impact on volatile asms.