https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110743
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> --- So I see some suppress_warning (tmp_dst, OPT_Wuninitialized) in clear-padding lowering. We might want to have a way to copy suppressed warnings from one location to another (I think that one is on locations?). The vectorizer throws away locations because in general locations correspond to different stmts (not in this case).
