[Piglit] [PATCH v2 1/2] shaders: add test to check (0 cmp x+y) optimization

[Samuel Iglesias Gonsálvez]

Hello,

I plan to push these two patches next week, just in case someone wants
to review them in the coming days.

Thanks,

Sam

On Mon, 2015-03-02 at 08:31 +0100, Samuel Iglesias Gonsalvez wrote:
> Signed-off-by: Samuel Iglesias Gonsalvez <siglesias at igalia.com>
> ---
> 
> v2:
> * Implement it as shader_runner test
> 
>  tests/shaders/glsl-opt-0-cmp-xy.shader_test | 33 +++++++++++++++++++++++++++++
>  1 file changed, 33 insertions(+)
>  create mode 100644 tests/shaders/glsl-opt-0-cmp-xy.shader_test
> 
> diff --git a/tests/shaders/glsl-opt-0-cmp-xy.shader_test b/tests/shaders/glsl-opt-0-cmp-xy.shader_test
> new file mode 100644
> index 0000000..57c5716
> --- /dev/null
> +++ b/tests/shaders/glsl-opt-0-cmp-xy.shader_test
> @@ -0,0 +1,33 @@
> +/* Test (0 cmp x+y) optimization. */
> +
> +[require]
> +GLSL >= 1.10
> +
> +[vertex shader]
> +
> +void main()
> +{
> +	gl_Position = ftransform();
> +}
> +
> +[fragment shader]
> +
> +uniform float a;
> +
> +void main()
> +{
> +	if (0.0 >= (a - 1.0))
> +	    gl_FragColor = vec4(0, 1, 0, 1);
> +	else
> +	    gl_FragColor = vec4(1, 0, 0, 1);
> +}
> +
> +[test]
> +clear color 0.5 0.5 0.5 0.5
> +clear
> +uniform float a 0
> +draw rect -1 -1 1 2
> +uniform float a 2
> +draw rect 0 -1 1 2
> +probe rgb 125 0 1.0 0.0 0.0
> +probe rgb 0 0 0.0 1.0 0.0


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