[Bug 42435] Suspected loss of varyings between shaders

[bugzilla-daemon@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=42435

--- Comment #7 from Alexander Sabourenkov <screwdriver@lxnt.info> 2011-11-01 17:53:45 PDT ---
Further reducing shaders I got to this point:

#version 120
#line 2 0

varying float idx;

void main() { 
    vec2 posn2 = posz*posn;
    idx = 0.625;
    gl_Position = gl_ModelViewProjectionMatrix*vec4(128, 128, 0.0, 1.0);
    gl_PointSize = 128;
}

#version 120
#line 2 0
varying float idx;

void main() {
    gl_FragColor = vec4(idx, 0, 0, 1);
}

This is in fact very close to glsl-novertexdata from the piglit.

Which still does not work on r600g and swrast while working ok on r600c and
llvmpipe.

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