<dawn>/test/tint/diagnostic_filtering/while_loop_attribute.wgsl:5:21 warning: 'dpdx' must only be called from uniform control flow
  while (x > 0.0 && dpdx(1.0) > 0.0)  {
                    ^^^^^^^^^

<dawn>/test/tint/diagnostic_filtering/while_loop_attribute.wgsl:5:3 note: control flow depends on possibly non-uniform value
  while (x > 0.0 && dpdx(1.0) > 0.0)  {
  ^^^^^

<dawn>/test/tint/diagnostic_filtering/while_loop_attribute.wgsl:5:21 note: return value of 'dpdx' may be non-uniform
  while (x > 0.0 && dpdx(1.0) > 0.0)  {
                    ^^^^^^^^^

@fragment
fn main(@location(0) x : f32) {
  var v = vec4<f32>(0);
  @diagnostic(warning, derivative_uniformity) while(((x > 0.0) && (dpdx(1.0) > 0.0))) {
  }
}