https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117761
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Andrew Pinski from comment #1) > https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2020/p1787r6.html That is gcc does not currently implements this paper.