http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56510
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-03-04 10:56:14 UTC --- Because TERed stmts won't be expanded, so there is nothing to refer to. Furthermore, in many cases expand_debug_expr relies on seeing the inner operand.
