uniform half4 colorGreen, colorRed;

struct S { int i; };

half4 fnGreen(bool b, float2) {
    return colorGreen;
}

half4 fnRed(int, float f, S) {
    return colorRed;
}

half4 main(float2 coords) {
    return bool(colorGreen.g) ? fnGreen(true, coords) : fnRed(123, 3.14, S(0));
}