[Piglit] Loop unrolling tests

[Eric Anholt]

On Thu, 1 Jul 2010 18:36:45 -0700, Tom Stellard <tstellar at gmail.com> wrote:
> On Thu, Jul 01, 2010 at 03:19:18PM -0700, Eric Anholt wrote:
> > On Thu, 1 Jul 2010 14:50:55 -0700, Tom Stellard <tstellar at gmail.com> wrote:
> > > Hi,
> > > 
> > > Attached is a patch to add some new loop tests to piglit.  The main
> > > purpose of these tests is to test loop unrolling.
> > 
> > One thing I've been doing in recent tests that have just one execution
> > path is instead of:
> > 
> > > +ortho
> > > +clear color 0.5 0.5 0.5 0.5
> > > +clear
> > > +draw rect 10 10 10 10
> > > +draw rect 30 10 10 10
> > > +probe rgb 15 15 0.6 0.6 0.5
> > > +probe rgb 35 15 0.6 0.6 0.5
> > 
> > do:
> > 
> > draw rect -1 -1 2 2
> > probe rgb 1 1 0.6 0.6 0.5
> > 
> > (where 1 1 is just "look at a pixel".  We may also want a "probe rect
> > rgb x y w h r g b" mode, since sometimes not all pixels are wrong)
> > 
> > This way when you're tracing the test app, you get just the shader
> > you're interested in instead of also a bunch of matrix
> > setup, a clear shader, etc.
> > 
> > Want to do that to your shaders here?
> 
> Yes, this makes sense.  Attached is an updated patch.

Looks good!  Pushed.
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