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

[Dave Airlie]

On Fri, Sep 3, 2010 at 10:46 AM, Marek Olšák <maraeo at gmail.com> wrote:
> 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.

I'd agree on that unless there is a nicer solution and the glsl
compiler can hide it from us.

Dave.