test/tint/expressions/type_ctor/mat2x2/inferred/identity/f32.wgsl

var<private> m = mat2x2(mat2x2(0.0f, 1.0f,
                               2.0f, 3.0f));

@group(0) @binding(0)
var<storage, read_write> out : mat2x2<f32>;

@compute @workgroup_size(1)
fn f() {
  out = mat2x2(m);
}