<dawn>/test/tint/diagnostic_filtering/if_statement_attribute.wgsl:8:14 warning: 'dpdx' must only be called from uniform control flow
  } else if (dpdx(1.0) > 0)  {
             ^^^^^^^^^

<dawn>/test/tint/diagnostic_filtering/if_statement_attribute.wgsl:7:3 note: control flow depends on possibly non-uniform value
  if (x > 0) {
  ^^

<dawn>/test/tint/diagnostic_filtering/if_statement_attribute.wgsl:7:7 note: user-defined input 'x' of 'main' may be non-uniform
  if (x > 0) {
      ^

#include <metal_stdlib>
using namespace metal;

struct tint_symbol_inputs {
  float x [[user(locn0)]];
};

void tint_symbol_inner(float x) {
  if ((x > 0.0f)) {
  } else {
    if ((dfdx(1.0f) > 0.0f)) {
    }
  }
}

fragment void tint_symbol(tint_symbol_inputs inputs [[stage_in]]) {
  tint_symbol_inner(inputs.x);
}