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)  {
                    ^^^^^^^^^

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)  {
  ^^^^^

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)  {
                    ^^^^^^^^^

; SPIR-V
; Version: 1.3
; Generator: Google Tint Compiler; 0
; Bound: 34
; Schema: 0
               OpCapability Shader
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %main "main" %x_1
               OpExecutionMode %main OriginUpperLeft
               OpName %x_1 "x_1"
               OpName %main_inner "main_inner"
               OpName %x "x"
               OpName %v "v"
               OpName %main "main"
               OpDecorate %x_1 Location 0
      %float = OpTypeFloat 32
%_ptr_Input_float = OpTypePointer Input %float
        %x_1 = OpVariable %_ptr_Input_float Input
       %void = OpTypeVoid
          %4 = OpTypeFunction %void %float
    %v4float = OpTypeVector %float 4
         %10 = OpConstantNull %v4float
%_ptr_Function_v4float = OpTypePointer Function %v4float
         %18 = OpConstantNull %float
       %bool = OpTypeBool
    %float_1 = OpConstant %float 1
         %29 = OpTypeFunction %void
 %main_inner = OpFunction %void None %4
          %x = OpFunctionParameter %float
          %8 = OpLabel
          %v = OpVariable %_ptr_Function_v4float Function %10
               OpStore %v %10
               OpBranch %13
         %13 = OpLabel
               OpLoopMerge %14 %15 None
               OpBranch %16
         %16 = OpLabel
         %19 = OpFOrdGreaterThan %bool %x %18
               OpSelectionMerge %21 None
               OpBranchConditional %19 %22 %21
         %22 = OpLabel
         %23 = OpDPdx %float %float_1
         %25 = OpFOrdGreaterThan %bool %23 %18
               OpBranch %21
         %21 = OpLabel
         %26 = OpPhi %bool %19 %16 %25 %22
         %17 = OpLogicalNot %bool %26
               OpSelectionMerge %27 None
               OpBranchConditional %17 %28 %27
         %28 = OpLabel
               OpBranch %14
         %27 = OpLabel
               OpBranch %15
         %15 = OpLabel
               OpBranch %13
         %14 = OpLabel
               OpReturn
               OpFunctionEnd
       %main = OpFunction %void None %29
         %31 = OpLabel
         %33 = OpLoad %float %x_1
         %32 = OpFunctionCall %void %main_inner %33
               OpReturn
               OpFunctionEnd