uniform half4 colorRed, colorGreen;

bool test() {
    bool ok = true;
    ok = ok &&  (float3x2(2) == float3x2(float2(2.0, 0.0), float2(0.0, 2.0), float2(0.0)));
    return ok;
}

half4 main(float2 coords) {
    return test() ? colorGreen : colorRed;
}