[Bug tree-optimization/103462] GCC failed to reduce bit clear in loop.

[crazylht at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103462

--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
Should it be done in vectorizer or ldist(just like memory op), or somewhere
else?