[Bug c/105363] -ftree-slp-vectorize decreases performance significantly (x64)

[crazylht at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105363

--- Comment #2 from Hongtao.liu <crazylht at gmail dot com> ---
Looks like neither ICC nor LLVM vectorized the loop
https://godbolt.org/z/sbheqbE6Y