[[stage(fragment)]]
fn main([[builtin(position)]] position : vec4<f32>, [[builtin(front_facing)]] front_facing : bool, [[builtin(sample_index)]] sample_index : u32, [[builtin(sample_mask)]] sample_mask : u32) {
  if (front_facing) {
    let foo : vec4<f32> = position;
    let bar : u32 = (sample_index + sample_mask);
  }
}