[Bug rtl-optimization/78116] [7 regression] Performance drop after r241173 on avx512 target

[amker at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78116

--- Comment #13 from amker at gcc dot gnu.org ---
We should create another PR for additional copy instructions after my patch and
close this one.  IMHO they are two different issues.