               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %main "main" %_GLF_color %frag_color
               OpExecutionMode %main OriginUpperLeft
               OpSource ESSL 310
               OpName %main "main"
               OpName %_GLF_color "_GLF_color"
               OpName %frag_color "frag_color"
               OpDecorate %_GLF_color Location 0
               OpDecorate %frag_color Location 0
       %void = OpTypeVoid
          %6 = OpTypeFunction %void
      %float = OpTypeFloat 32
    %v4float = OpTypeVector %float 4
%_ptr_Output_v4float = OpTypePointer Output %v4float
 %_GLF_color = OpVariable %_ptr_Output_v4float Output
%_ptr_Input_v4float = OpTypePointer Input %v4float
 %frag_color = OpVariable %_ptr_Input_v4float Input
       %main = OpFunction %void None %6
         %11 = OpLabel
         %12 = OpLoad %v4float %frag_color
               OpStore %_GLF_color %12
               OpReturn
               OpFunctionEnd