[Piglit] [PATCH] glsl-1.10/fs-texture-select: new test for a radeonsi bug

[Tapani Pälli]

Reviewed-by: Tapani Pälli <tapani.palli at intel.com>

On 10/04/2016 06:36 PM, Marek Olšák wrote:
> From: Marek Olšák <marek.olsak at amd.com>
>
> ---
>  .../execution/fs-texture-select.shader_test        | 34 ++++++++++++++++++++++
>  1 file changed, 34 insertions(+)
>  create mode 100644 tests/spec/glsl-1.10/execution/fs-texture-select.shader_test
>
> diff --git a/tests/spec/glsl-1.10/execution/fs-texture-select.shader_test b/tests/spec/glsl-1.10/execution/fs-texture-select.shader_test
> new file mode 100644
> index 0000000..4fd57c6
> --- /dev/null
> +++ b/tests/spec/glsl-1.10/execution/fs-texture-select.shader_test
> @@ -0,0 +1,34 @@
> +# Even columns fetch from tex0 (black), while odd columns fetch from tex1 (white).
> +# The shader inverts the color of even collumns to get make them white,
> +# so the final image should be completely white.
> +#
> +# At the moment, radeonsi miscompiles this shader and only fetches from tex0
> +# in both cases.
> +
> +[require]
> +GLSL >= 1.10
> +
> +[vertex shader passthrough]
> +
> +[fragment shader]
> +uniform sampler2D tex0, tex1;
> +
> +void main()
> +{
> +    bool pat = fract(gl_FragCoord.x / 2.0) < 0.5;
> +    gl_FragColor = pat ?
> +             texture2D(tex0, gl_TexCoord[0].xy) :
> +             texture2D(tex1, gl_TexCoord[0].xy);
> +
> +    if (pat)
> +        gl_FragColor = vec4(1.0) - gl_FragColor;
> +}
> +
> +[test]
> +texture checkerboard 0 0 (8, 8) (0, 0, 0, 0) (0, 0, 0, 0)
> +texture checkerboard 1 0 (8, 8) (1, 1, 1, 1) (1, 1, 1, 1)
> +
> +uniform int tex0 0
> +uniform int tex1 1
> +draw rect -1 -1 2 2
> +probe all rgba 1.0 1.0 1.0 1.0
>