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

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

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

#include <metal_stdlib>

using namespace metal;
struct tint_symbol_2 {
  float x [[user(locn0)]];
};

void tint_symbol_inner(float x) {
  float4 v = float4(0.0f);
  for(; ((x > v[0]) && (dfdx(1.0f) > 0.0f)); ) {
  }
}

fragment void tint_symbol(tint_symbol_2 tint_symbol_1 [[stage_in]]) {
  tint_symbol_inner(tint_symbol_1.x);
  return;
}