spv.viewportindex.tese
// Module Version 10000
// Generated by (magic number): 8000b
// Id's are bound by 10

                              Capability Tessellation
                              Capability ShaderViewportIndexLayerNV
                              Extension  "SPV_EXT_shader_viewport_index_layer"
               1:             ExtInstImport  "GLSL.std.450"
                              MemoryModel Logical GLSL450
                              EntryPoint TessellationEvaluation 4  "main" 8
                              ExecutionMode 4 Triangles
                              ExecutionMode 4 SpacingEqual
                              ExecutionMode 4 VertexOrderCcw
                              Source GLSL 450
                              SourceExtension  "GL_ARB_shader_viewport_layer_array"
                              Name 4  "main"
                              Name 8  "gl_ViewportIndex"
                              Decorate 8(gl_ViewportIndex) BuiltIn ViewportIndex
               2:             TypeVoid
               3:             TypeFunction 2
               6:             TypeInt 32 1
               7:             TypePointer Output 6(int)
8(gl_ViewportIndex):      7(ptr) Variable Output
               9:      6(int) Constant 1
         4(main):           2 Function None 3
               5:             Label
                              Store 8(gl_ViewportIndex) 9
                              Return
                              FunctionEnd