var<private> m = mat3x3<f32>(vec3<f32>(0.0f, 1.0f, 2.0f),
                             vec3<f32>(3.0f, 4.0f, 5.0f),
                             vec3<f32>(6.0f, 7.0f, 8.0f));

@group(0) @binding(0)
var<storage, read_write> out : mat3x3<f32>;

@compute @workgroup_size(1)
fn f() {
  out = m;
}