struct UBO {
  data: array<vec4<i32>, 4>,
  dynamic_idx: i32,
};
@group(0) @binding(0) var<uniform> ubo: UBO;
struct Result {
  out: i32,
};
@group(0) @binding(2) var<storage, read_write> result: Result;

@compute @workgroup_size(1)
fn f() {
  result.out = ubo.data[ubo.dynamic_idx].x;
}