[Bug rtl-optimization/44194] struct returned by value generates useless stores

[xinliangli at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44194

--- Comment #34 from davidxl <xinliangli at gmail dot com> 2011-06-20 16:25:04 UTC ---
(In reply to comment #33)
> > I think these two are totally independent of each other -- one should not be
> > gated against each other. If Eawaran's approach is completely flawed, that is
> > different story.  With this change, we at least make incremental improvement.  
> > Not familiar with the rtl expander, but I guess the spilling was there probably
> > for a deeper reason. If you have an insight, you can of course point it out.
> 
> See comment #22.  It's an incremental improvement, but maybe we can avoid
> wasting time and memory by creating RTXes and Trees that will be thrown away
> immediately after.  I don't really see what we risk by trying.

yes, of course -- since you have explicit suggestion, it can be tried. Easwaran
might have looked into this more ..

David