http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34949 --- Comment #9 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-09-01 09:10:11 UTC --- It looks to me that the C++ FE could detect that the vtable pointer update would adjust it to itself (I even can't construct a testcase that would adjust it _not_ to itself ...).