[Bug c/110738] GCC trunk failed to do some optimizations since GCC-8

[shaohua.li at inf dot ethz.ch via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110738

--- Comment #3 from Shaohua Li <shaohua.li at inf dot ethz.ch> ---
Would this test case be interesting? If no, I won't report other similar
issues.

https://godbolt.org/z/9xr1rv37s