dawn-cmake/test/shader_io/fragment_input_locations.wgsl

[[stage(fragment)]]
fn main(
  [[location(0), interpolate(flat)]] loc0 : i32,
  [[location(1), interpolate(flat)]] loc1 : u32,
  [[location(2)]] loc2 : f32,
  [[location(3)]] loc3 : vec4<f32>,
) {
  let i : i32 = loc0;
  let u : u32 = loc1;
  let f : f32 = loc2;
  let v : vec4<f32> = loc3;
}