https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89626
--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> --- "vector signed __int128" and "vector unsigned __int128" are both defined, and both work fine. But "vector __int128" is not defined in the ABI, and does not work unless you are building for power8 or up. Bill, what should the ABI say about this?
