OpCapability Shader
          %5 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint GLCompute %main "main" %sk_GlobalInvocationID %sk_LocalInvocationID %sk_LocalInvocationIndex %sk_NumWorkgroups %sk_WorkgroupID
               OpExecutionMode %main LocalSize 64 1 1

               ; Debug Information
               OpName %outputs "outputs"            ; id %11
               OpMemberName %outputs 0 "outputBuffer"
               OpName %sk_GlobalInvocationID "sk_GlobalInvocationID"    ; id %13
               OpName %sk_LocalInvocationID "sk_LocalInvocationID"      ; id %16
               OpName %sk_LocalInvocationIndex "sk_LocalInvocationIndex"    ; id %17
               OpName %sk_NumWorkgroups "sk_NumWorkgroups"                  ; id %19
               OpName %sk_WorkgroupID "sk_WorkgroupID"                      ; id %20
               OpName %helper_I "helper_I"                                  ; id %6
               OpName %main "main"                                          ; id %7

               ; Annotations
               OpDecorate %_runtimearr_uint ArrayStride 4
               OpMemberDecorate %outputs 0 Offset 0
               OpDecorate %outputs BufferBlock
               OpDecorate %8 Binding 0
               OpDecorate %8 DescriptorSet 0
               OpDecorate %sk_GlobalInvocationID BuiltIn GlobalInvocationId
               OpDecorate %sk_LocalInvocationID BuiltIn LocalInvocationId
               OpDecorate %sk_LocalInvocationIndex BuiltIn LocalInvocationIndex
               OpDecorate %sk_NumWorkgroups BuiltIn NumWorkgroups
               OpDecorate %sk_WorkgroupID BuiltIn WorkgroupId

               ; Types, variables and constants
        %int = OpTypeInt 32 1
%_ptr_Input_int = OpTypePointer Input %int
       %uint = OpTypeInt 32 0
%_runtimearr_uint = OpTypeRuntimeArray %uint        ; ArrayStride 4
    %outputs = OpTypeStruct %_runtimearr_uint       ; BufferBlock
%_ptr_Uniform_outputs = OpTypePointer Uniform %outputs
          %8 = OpVariable %_ptr_Uniform_outputs Uniform     ; Binding 0, DescriptorSet 0
     %v3uint = OpTypeVector %uint 3
%_ptr_Input_v3uint = OpTypePointer Input %v3uint
%sk_GlobalInvocationID = OpVariable %_ptr_Input_v3uint Input    ; BuiltIn GlobalInvocationId
%sk_LocalInvocationID = OpVariable %_ptr_Input_v3uint Input     ; BuiltIn LocalInvocationId
%_ptr_Input_uint = OpTypePointer Input %uint
%sk_LocalInvocationIndex = OpVariable %_ptr_Input_uint Input    ; BuiltIn LocalInvocationIndex
%sk_NumWorkgroups = OpVariable %_ptr_Input_v3uint Input         ; BuiltIn NumWorkgroups
%sk_WorkgroupID = OpVariable %_ptr_Input_v3uint Input           ; BuiltIn WorkgroupId
         %21 = OpTypeFunction %uint
       %void = OpTypeVoid
         %35 = OpTypeFunction %void
      %int_0 = OpConstant %int 0
%_ptr_Uniform_uint = OpTypePointer Uniform %uint


               ; Function helper_I
   %helper_I = OpFunction %uint None %21

         %22 = OpLabel
         %23 =   OpLoad %v3uint %sk_NumWorkgroups
         %24 =   OpCompositeExtract %uint %23 0
         %25 =   OpLoad %v3uint %sk_WorkgroupID
         %26 =   OpCompositeExtract %uint %25 0
         %27 =   OpIAdd %uint %24 %26
         %28 =   OpLoad %v3uint %sk_LocalInvocationID
         %29 =   OpCompositeExtract %uint %28 0
         %30 =   OpIAdd %uint %27 %29
         %31 =   OpLoad %v3uint %sk_GlobalInvocationID
         %32 =   OpCompositeExtract %uint %31 0
         %33 =   OpIAdd %uint %30 %32
                 OpReturnValue %33
               OpFunctionEnd


               ; Function main
       %main = OpFunction %void None %35

         %36 = OpLabel
         %37 =   OpFunctionCall %uint %helper_I
         %39 =   OpLoad %uint %sk_LocalInvocationIndex
         %40 =   OpAccessChain %_ptr_Uniform_uint %8 %int_0 %39
                 OpStore %40 %37
                 OpReturn
               OpFunctionEnd