dawn-cmake/test/shader_io/compute_input_builtins.wgsl

[[stage(compute), workgroup_size(1)]]
fn main(
  [[builtin(local_invocation_id)]] local_invocation_id : vec3<u32>,
  [[builtin(local_invocation_index)]] local_invocation_index : u32,
  [[builtin(global_invocation_id)]] global_invocation_id : vec3<u32>,
  [[builtin(workgroup_id)]] workgroup_id : vec3<u32>,
  // TODO(crbug.com/tint/752): [[builtin(num_workgroups)]] num_workgroups : vec3<u32>;
) {
  let foo : u32 =
    local_invocation_id.x +
    local_invocation_index + 
    global_invocation_id.x + 
    workgroup_id.x;
}