[Bug target/120428] [14/15/16 regression] Suboptimal autovec involving blocked permutation and std::copy

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120428

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Shawn Xu from comment #0)
> On x86-64 with avx512, PR115444 caused the following code to vectorize
> sub-optimally:

What made you blame PR115444 for this? Did you actually bisect it?