https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69922
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Created attachment 37780 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37780&action=edit gcc6-pr69922.patch Well, setting TREE_NO_WARNING on the spot where the C++ FE adds the artificial compares is not that hard, I think I've spotted all (not 100% sure about nonnull attribute pointer to members). But there is a major problem that the TREE_NO_WARNING flag should survive folding, and I'm not sure what to do there.
