[Mesa-dev] [PATCH] st/mesa: remove copy-propagation pass

[Ilia Mirkin]

On Wed, Mar 25, 2015 at 4:27 PM, Dave Airlie <airlied at gmail.com> wrote:
> On 26 March 2015 at 06:07, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
>> So.... what do you do when someone goes to shadertoy.com which on
>> average uses 1000 temps?
>
> Fall over in a heap, like every other driver on shadertoy,

nouveau (nv50/nvc0) tends to do pretty well. There's one particular
shader that ends up being shifted over for reasons unknown, but no
compilation failures. i965 tends to do OK too, although I've seen
weird rendering artifacts, although those could well be due to the
shaders relying on unspecified behaviour.

>
> This would be raelly bad for r600g in its present state, since it
> doesn't go TGSI->SB yet, and thus has a TEMP limit that this would
> only make worse.

D'oh, right, r600 relies on there being no more than 124 or 128
registers. Forgot about that.

>
> so Nak from me.
>
> Dave.

So I suppose you want to fix the copy_propagation issue? :)

  -ilia