2 %1 = OpExtInstImport "GLSL.std.450"
3 OpMemoryModel Logical GLSL450
4 OpEntryPoint Vertex %main "main" %sk_VertexID %id
5 OpName %sk_VertexID "sk_VertexID"
8 OpDecorate %sk_VertexID BuiltIn VertexIndex
9 OpDecorate %id Location 1
11 %_ptr_Input_int = OpTypePointer Input %int
12 %sk_VertexID = OpVariable %_ptr_Input_int Input
13 %_ptr_Output_int = OpTypePointer Output %int
14 %id = OpVariable %_ptr_Output_int Output
16 %9 = OpTypeFunction %void
17 %main = OpFunction %void None %9
19 %11 = OpLoad %int %sk_VertexID