1OpCapability Shader 2%1 = OpExtInstImport "GLSL.std.450" 3OpMemoryModel Logical GLSL450 4OpEntryPoint Fragment %main "main" %sk_Clockwise 5OpExecutionMode %main OriginUpperLeft 6OpName %sk_Clockwise "sk_Clockwise" 7OpName %main "main" 8OpDecorate %sk_Clockwise BuiltIn FrontFacing 9%bool = OpTypeBool 10%_ptr_Input_bool = OpTypePointer Input %bool 11%sk_Clockwise = OpVariable %_ptr_Input_bool Input 12%void = OpTypeVoid 13%7 = OpTypeFunction %void 14%false = OpConstantFalse %bool 15%main = OpFunction %void None %7 16%8 = OpLabel 17OpReturn 18OpFunctionEnd 19