test/tint/expressions/type_ctor/mat3x3/explicit/identity/f32.wgsl

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

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

@compute @workgroup_size(1)
fn f() {
  out = mat3x3<f32>(m);
}