[Bug target/87370] [7/8/9 Regression] Inefficient return code of struct values

[trashyankes at wp dot pl]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87370

--- Comment #12 from trashyankes at wp dot pl ---
(In reply to H.J. Lu from comment #11)
> (In reply to trashyankes from comment #10)
> 
> Which GCC are you using? GCC 8.2 generates:

GCC Explorer :D

g++ (GCC-Explorer-Build) 9.0.0 20181211 (experimental)

https://gcc.godbolt.org/z/7AQXiq

Code is copy paste of test case.
Compiler is x86-64
Important are flags: `-O3 -march=skylake-avx512`
Without it compile this code fine.