[code]
fn promote_f32_to_f64(x: f32) -> f64 {
    return x as f64;
}

fn demote_f64_to_f32(x: f64) -> f32 {
    return x as f32;
}

[harness]
extern double promote_f32_to_f64(float x);
extern float demote_f64_to_f32(double x);

int main() {
    if (promote_f32_to_f64(3.5f) != 3.5) return 1;
    if (demote_f64_to_f32(2.25) != 2.25f) return 2;
    return 0;
}

[expected_return_code]
0