diagnostic_filtering/switch_statement_attribute.wgsl:7:27 warning: 'dpdx' must only be called from uniform control flow
  switch (i32(x == 0.0 && dpdx(1.0) == 0.0)) {
                          ^^^^^^^^^

diagnostic_filtering/switch_statement_attribute.wgsl:7:24 note: control flow depends on possibly non-uniform value
  switch (i32(x == 0.0 && dpdx(1.0) == 0.0)) {
                       ^^

diagnostic_filtering/switch_statement_attribute.wgsl:7:15 note: user-defined input 'x' of 'main' may be non-uniform
  switch (i32(x == 0.0 && dpdx(1.0) == 0.0)) {
              ^

; SPIR-V
; Version: 1.3
; Generator: Google Tint Compiler; 0
; Bound: 35
; Schema: 0
               OpCapability Shader
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %main "main" %x_1
               OpExecutionMode %main OriginUpperLeft
               OpName %x_1 "x_1"
               OpName %t "t"
               OpName %s "s"
               OpName %main_inner "main_inner"
               OpName %x "x"
               OpName %main "main"
               OpDecorate %x_1 Location 0
               OpDecorate %t DescriptorSet 0
               OpDecorate %t Binding 1
               OpDecorate %s DescriptorSet 0
               OpDecorate %s Binding 2
      %float = OpTypeFloat 32
%_ptr_Input_float = OpTypePointer Input %float
        %x_1 = OpVariable %_ptr_Input_float Input
          %6 = OpTypeImage %float 2D 0 0 0 1 Unknown
%_ptr_UniformConstant_6 = OpTypePointer UniformConstant %6
          %t = OpVariable %_ptr_UniformConstant_6 UniformConstant
          %9 = OpTypeSampler
%_ptr_UniformConstant_9 = OpTypePointer UniformConstant %9
          %s = OpVariable %_ptr_UniformConstant_9 UniformConstant
       %void = OpTypeVoid
         %10 = OpTypeFunction %void %float
        %int = OpTypeInt 32 1
         %18 = OpConstantNull %float
       %bool = OpTypeBool
    %float_1 = OpConstant %float 1
      %int_0 = OpConstant %int 0
      %int_1 = OpConstant %int 1
         %30 = OpTypeFunction %void
 %main_inner = OpFunction %void None %10
          %x = OpFunctionParameter %float
         %14 = OpLabel
         %19 = OpFOrdEqual %bool %x %18
               OpSelectionMerge %21 None
               OpBranchConditional %19 %22 %21
         %22 = OpLabel
         %23 = OpDPdx %float %float_1
         %25 = OpFOrdEqual %bool %23 %18
               OpBranch %21
         %21 = OpLabel
         %26 = OpPhi %bool %19 %14 %25 %22
         %16 = OpSelect %int %26 %int_1 %int_0
               OpSelectionMerge %15 None
               OpSwitch %16 %29
         %29 = OpLabel
               OpBranch %15
         %15 = OpLabel
               OpReturn
               OpFunctionEnd
       %main = OpFunction %void None %30
         %32 = OpLabel
         %34 = OpLoad %float %x_1
         %33 = OpFunctionCall %void %main_inner %34
               OpReturn
               OpFunctionEnd