               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %main "main" %sk_Clockwise %sk_FragColor
               OpExecutionMode %main OriginUpperLeft
               OpName %testBlock "testBlock"
               OpMemberName %testBlock 0 "x"
               OpName %sk_Clockwise "sk_Clockwise"
               OpName %sk_FragColor "sk_FragColor"
               OpName %main "main"
               OpMemberDecorate %testBlock 0 Offset 0
               OpDecorate %testBlock Block
               OpDecorate %3 Binding 456
               OpDecorate %3 DescriptorSet 0
               OpDecorate %sk_Clockwise BuiltIn FrontFacing
               OpDecorate %sk_FragColor RelaxedPrecision
               OpDecorate %sk_FragColor Location 0
               OpDecorate %sk_FragColor Index 0
               OpDecorate %21 RelaxedPrecision
      %float = OpTypeFloat 32
  %testBlock = OpTypeStruct %float
%_ptr_Uniform_testBlock = OpTypePointer Uniform %testBlock
          %3 = OpVariable %_ptr_Uniform_testBlock Uniform
       %bool = OpTypeBool
%_ptr_Input_bool = OpTypePointer Input %bool
%sk_Clockwise = OpVariable %_ptr_Input_bool Input
    %v4float = OpTypeVector %float 4
%_ptr_Output_v4float = OpTypePointer Output %v4float
%sk_FragColor = OpVariable %_ptr_Output_v4float Output
       %void = OpTypeVoid
         %14 = OpTypeFunction %void
        %int = OpTypeInt 32 1
      %int_0 = OpConstant %int 0
%_ptr_Uniform_float = OpTypePointer Uniform %float
       %main = OpFunction %void None %14
         %15 = OpLabel
         %18 = OpAccessChain %_ptr_Uniform_float %3 %int_0
         %20 = OpLoad %float %18
         %21 = OpCompositeConstruct %v4float %20 %20 %20 %20
               OpStore %sk_FragColor %21
               OpReturn
               OpFunctionEnd
