https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111411
--- Comment #2 from Sam James <sjames at gcc dot gnu.org> --- Created attachment 55897 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55897&action=edit reduced.i I've attached a reduced version but the memcpy bit could do with cleaning up for it to be a bit more sensible.