------- Comment #18 from jakub at gcc dot gnu dot org 2010-07-07 13:55 ------- That's not SSA name, but DECL_UID of the underlying decl. I believe such changes are considered ok if it just means different gaps between uids with -g vs. -g0.
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44832