https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61729
--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> --- Okay, I'll make it work for SVR4 in the rs6000 backend then. The generic code makes suboptimal code, many ABIs need to update (even those that haven't changed for 25 years), and more backends will need to adjust; but if this is what C++ decided, we'll have to work with that. Thanks for the confirmation.
