https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102586
--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> --- So, perhaps if RECORD_TYPE type has TYPE_BINFO in clear_padding_type, we should be ignoring all the DECL_ARTIFICIAL unnamed fields in the structure and instead walk the BINFO_BASE_BINFOS ? Though, in the C8 case, the C7 type of the first FIELD_DECL is the same as TREE_TYPE of BINFO_BASE_BINFOS[0], so I'm lost where to find the right types.