[Bug tree-optimization/90883] Generated code is worse if returned struct is unnamed

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90883

--- Comment #26 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #25)
> The FRE redundant store removal went away in r273135 aka PR91091 fix.

I'll see whether I can do something about FRE.  Redundant store removal
there isn't a good fit and thus not easy to get semantically correct.