[Bug c/117266] RFE: builtins for N*N -> 2N multiplication and 2N/N -> N div/mod

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117266

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I don't think these are useful. Especially now with _BitInt.