[Bug tree-optimization/92344] Missing considering fre optimization of vector load in auto-vectorization

[crazylht at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92344

--- Comment #2 from Hongtao.liu <crazylht at gmail dot com> ---
@hj Maybe we should set -mprefer-vector-width=128 as default, I'll have a test
on SPEC2017 to see the influence.