https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115847
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Yeah, the Intel ABI for this only handles scalar integral/pointer/enum/bool/floating point types and _Complex, and our variant thereof doesn't even handle _Complex. Returning arrays is returning pointers, so that works, but returning other types should be handled like the struct cases.