https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79593
--- Comment #22 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Well, RTL DSE isn't a very good fit either, it doesn't track the loads at all, it will only process them and immediately forget, only stores are recorded. To optimize these it would need to remember them somewhere, invalidate whenever we clobber the registers etc.
