[Bug c/105495] `__atomic_compare_exchange` prevents tail-call optimization

[lh_mouse at 126 dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105495

--- Comment #3 from LIU Hao <lh_mouse at 126 dot com> ---
Wouldn't that go away if the value in it is never read back?