[Mesa-dev] [RFC] Mesa 7.9 release criteria

Marek Olšák maraeo at gmail.com
Thu Sep 2 17:46:17 PDT 2010

On Fri, Sep 3, 2010 at 12:54 AM, Dave Airlie <airlied at gmail.com> wrote:

> >
> >  - Later Radeons and NV chips:  I thought that these each had their own
> > register allocators than ran after Mesa's.  These should be able to do
> > the right thing.  Yes?
> r600c doesn't have anything smart for register allocation yet. We've
> had regression reports since Eric's change
> https://bugs.freedesktop.org/show_bug.cgi?id=29978

If you mean this shader: http://fpaste.org/ejpo/
There is nothing register allocation can do about because there are indexed
temporaries. You can reallocate temporaries starting at instruction index
47, which is too late. Note that this shader can't run on R300->R500 because
the limit is 32 temporaries in vertex shaders. Also a lot of other
optimizations are basically unusable/inapplicable with indexed temporaries.
I'd rather have commit 5ad74779cea07cc6a19a52874cdaef8b018e2f1b reverted. I
consider this a showstopper.

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