https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107115
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> --- If we don't want to treat such copies as noop moves, then either we need to change rtx_equal_p such that it will say MEMs aren't equal if the the alias sets are different, or should tweak in the same spirit the i386.md peephole2 and set_noop_p (and perhaps some other spot). But if we do either of that, it would be nice to get rid of the for assembly actually noop move later on shortly before expansion or emit it as nothing, because assembler then doesn't care about alias sets.
