Method GenerateFunctionDefinition

Source/SpireCore/SpirVCodeGen.cpp:4684–4733

			}

			int GenerateFunctionDefinition(CompiledFunction *func, ILOperand *vertexOutput = nullptr)
				//return the ID of the Function
			{
				ctx.ClearBuffer();

				ctx.PushScope();

				int funcID = ctx.FunctionNameToFunctionID[func->Name]();
				int funcTypeID = ctx.FunctionNameToFunctionTypeID[func->Name]();

				ctx.AddInstrFunction(funcID, ctx.DefineType(func->ReturnType), funcTypeID, GetFuncOriginalName(func->Name));

				for (auto & instr : *func->Code)
					if (auto arg = instr.As<FetchArgInstruction>())
						if (arg->ArgId != 0)
						{
							if (!ctx.ParameterNameToID.ContainsKey((ILOperand*)&instr))
							{
								ctx.DefineType(arg->Type);
								int typeID = ctx.DefineTypePointer(arg->Type, StorageClass::Function);
								ctx.AddInstrFunctionParameter((ILOperand*)&instr, typeID, arg->Name);
							}
						}

				++ctx.CurrentID;
				ctx.AddInstrLabel_AtFunctionHeader(ctx.CurrentID);

				func->Code->NameAllInstructions();
				GenerateCode(func->Code.Ptr(), ctx.CurrentID);

				if (vertexOutput)
				{
					int valueID = ctx.AddInstrLoad(nullptr, vertexOutput, MemoryAccess::None);
					int gl_PositionID = ctx.AddInstrAccessChain_StructMember(
						0,
						ctx.InterfaceNameToID["variable_gl_PerVertex"],
						"gl_Position"
					);
					ctx.AddInstrStore(0, gl_PositionID, valueID);
				}

				ctx.AddInstrReturn();
				ctx.AddInstrFunctionEnd();

				ctx.ProduceFunction();

				ctx.PopScope();

				return funcID;
			}

			void Decorate(int ID, Decoration deco, int op1 = -1)
			{