[Bug tree-optimization/104521] wrong code at -O2 and -O3 on x86_64-linux-gnu

[zhendong.su at inf dot ethz.ch via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104521

--- Comment #1 from Zhendong Su <zhendong.su at inf dot ethz.ch> ---
>From Compiler Explorer: https://godbolt.org/z/Y37Wo9e8c