[require]
GLSL >= 1.20

[vertex shader]
attribute vec4 position;
void main () {
    gl_Position = position;
}

[fragment shader]
void main() {
    vec4 color;
    if (gl_FragCoord.x < 250)
        color = vec4(1.0f, 1.0f, 1.0f, 1.0f);
    else
        // changing the color on the line below
        // affects R600_LLVM=1 output although it shouldn't
        color = vec4(1.0f,0.0f,0.0f,1.0f);

    if (gl_FragCoord.x >= 250) {
        gl_FragColor = vec4(0.0f,1.0f,0.0f,1.0f);
    } else {
        gl_FragColor = vec4(color.xyz / 2, 1.0f);
    }
}

[test]
draw rect -1 -1 2 2
probe all rgba 0.5 0.5 0.5 1.0