test/benchmark/simple_compute.wgsl

struct SB {
  data : array<i32>;
};

[[group(0), binding(0)]] var<storage, read_write> buffer : SB;

[[stage(compute), workgroup_size(1, 2, 3)]]
fn main([[builtin(global_invocation_id)]] id : vec3<u32>) {
  buffer.data[id.x] = buffer.data[id.x] + 1;
}