[Bug c/46073] __builtin_choose_expr outputs warnings for unused expression

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46073

--- Comment #4 from qinzhao at gcc dot gnu.org ---
the adoption of the new builtin __builtin_get_counted_by (PR116016) depends on
fixing this PR.