Re: -freg-struct-return?

[H. Peter Anvin]

Andi Kleen wrote:
> On Thu, Feb 22, 2007 at 09:39:04AM -0800, Jeremy Fitzhardinge wrote:
> > H. Peter Anvin wrote:
> > > Sometimes returning small structures is really nice.  If you can pass
> > > them in registers, it's often generates the fastest possible code;
> > > much better than using a pointer. 
> > Yes, but specifically, are there any pieces of assembler which return
> > structures?  It appears there are none (since Ingo got a booting
> > kernel), but there might be something obscure in some corner.
>
> When I did the x86-64 port I went over all assembler and I can't remember
> anything that did that. Of course there might be out of tree drivers
> that do, but they just have to fix it up.
>
> BTW would it make sense to have a special announcement list for such changes?

To some degree linux-arch would be a good list for it, but it's closed, 
even to monitor.

	-hpa
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