[Bug c/59708] clang-compatible checked arithmetic builtins

[josh at joshtriplett dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59708

--- Comment #4 from Josh Triplett <josh at joshtriplett dot org> ---
(In reply to Jakub Jelinek from comment #2)
> Not sure I like their naming though, I'd say they should be type generic
> builtins handled in the FEs depending on the first argument's type, so that
> it works even for say __int128_t and similar.

I'd like to have builtins compatible with the clang versions, but adding a set
of type-generic versions sounds like a great idea as well.