[Bug 31246] Reproducible hangs on piglit tests with 5850

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https://bugs.freedesktop.org/show_bug.cgi?id=31246

--- Comment #2 from Kjell Rune Skaaraas <temp9476-freedesktop@xxxxxxxx> 2010-11-06 12:44:17 PDT ---
To put it this way, I found the patches you referred to but they don't tell me
much. I did dig through the piglet code and found the definition of the test
though, it's in a bit of meta-code:

[require]
GL >= 2.0
GLSL >= 1.10

[vertex shader]
void main()
{
        gl_Position = gl_Vertex;
}

[fragment shader]
uniform int early;

void main()
{
        gl_FragColor = vec4(0.0, 1.0, 0.0, 0.0);
        if (early != 0) /* always true */
                return;
        gl_FragColor = vec4(1.0, 0.0, 0.0, 0.0);
}

[test]
uniform int early 1
draw rect -1 -1 2 2
probe all rgba 0.0 1.0 0.0 0.0

----

So my next question is really how I can look at what GPU instructions the
driver *would* create for these shaders, without actually running the shaders.
I tried catching that with RADEON_DEBUG=all but that just gives me a zero byte
file after reboot so it's no good.

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