test/tint/expressions/type_conv/mat2x2/var/f16-f32.wgsl

// flags:  --hlsl_shader_model 62
enable f16;
var<private> u = mat2x2<f16>(1.0h, 2.0h,
                             3.0h, 4.0h);
fn f() {
    var v : mat2x2<f32> = mat2x2<f32>(u);
}