https://gcc.gnu.org/bugzilla/show_bug.cgi?id=32667
--- Comment #27 from Jakub Jelinek <jakub at gcc dot gnu.org> --- (In reply to Rich Felker from comment #26) > > The only reasonable fix on the compiler side is to never emit memcpy but > > always use memmove. > > No, it can literally just emit (equivalent at whatever intermediate form of): > > cmp src,dst > je 1f > call memcpy > 1: > > in place of memcpy. No, that is not a reasonable fix, because it severely pessimizes common code for a theoretical only problem.
