[Bug tree-optimization/98563] regression: vectorization fails while it worked on gcc 9 and earlier

[nathanael.schaeffer at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98563

--- Comment #1 from N Schaeffer <nathanael.schaeffer at gmail dot com> ---
I just found the -mprefer-vector-width=512 to force to use zmm.
The reported regression however remains.