<dawn>/test/tint/diagnostic_filtering/while_loop_body_attribute.wgsl:8:9 warning: 'textureSample' must only be called from uniform control flow
    v = textureSample(t, s, vec2(0, 0));
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

<dawn>/test/tint/diagnostic_filtering/while_loop_body_attribute.wgsl:7:3 note: control flow depends on possibly non-uniform value
  while (x > v.x) @diagnostic(warning, derivative_uniformity) {
  ^^^^^

<dawn>/test/tint/diagnostic_filtering/while_loop_body_attribute.wgsl:8:9 note: return value of 'textureSample' may be non-uniform
    v = textureSample(t, s, vec2(0, 0));
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

#include <metal_stdlib>

using namespace metal;

#define TINT_ISOLATE_UB(VOLATILE_NAME) \
  volatile bool VOLATILE_NAME = true; \
  if (VOLATILE_NAME)

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

void tint_symbol_inner(float x, texture2d<float, access::sample> tint_symbol_3, sampler tint_symbol_4) {
  float4 v = float4(0.0f);
  TINT_ISOLATE_UB(tint_volatile_true) while((x > v[0])) {
    v = tint_symbol_3.sample(tint_symbol_4, float2(0.0f));
  }
}

fragment void tint_symbol(texture2d<float, access::sample> tint_symbol_5 [[texture(0)]], sampler tint_symbol_6 [[sampler(0)]], tint_symbol_2 tint_symbol_1 [[stage_in]]) {
  tint_symbol_inner(tint_symbol_1.x, tint_symbol_5, tint_symbol_6);
  return;
}