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

["xinliangli at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

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

--- Comment #25 from davidxl <xinliangli at gmail dot com> 2011-06-16 07:41:57 UTC ---
On Wed, Jun 15, 2011 at 10:26 PM, ebotcazou at gcc dot gnu.org <
gcc-bugzilla@gcc.gnu.org> wrote:

> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44194
>
> --- Comment #24 from Eric Botcazou <ebotcazou at gcc dot gnu.org>
> 2011-06-16 05:26:56 UTC ---
> > It would be nice if the expander does not spill the return into memory in
> the
> > first place if possible.  On other hand tagging compiler created memory
> > location with temp decls so that aliaser has the symbolic information
> seems a
> > useful mechanism.
>
> But a poor kludge if you can avoid spilling to memory in the first place.
>

No I am talking about more general situation where temporary memory is
created in RTL pass.

David


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