[Bug c++/116459] gcc 12.2.0 optimized out functions which has observable side affect

[xiaohuba2021 at 163 dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116459

--- Comment #4 from xiaohuba2021 <xiaohuba2021 at 163 dot com> ---
Yes, it seems that only 12.1 and 12.2 are affected. But I wonder what's the
cause of it, and are there any patches for it?