https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62018
--- Comment #16 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> --- (In reply to rguent...@suse.de from comment #15) > Your example directly calling __addvsi3 should suffice for that. I've filed it (radar #18924081), but I don't expect them to fix anything, because it is an undocumented internal function, supported for backward compatibility.