[Bug target/111905] -O3 vectorization terribly pessimizes the code for an already unrolled loop

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111905

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
          Component|tree-optimization           |target
             Target|                            |x86_64-linux-gnu

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Why are you using `-mprefer-vector-width=512` here?

512 causes the loop to be needing to be unrolled once more and that is why the
confusion happening.