Added some of the implementation but not complete #t51

src/intermediate_code.c

@@ -100,6 +100,8 @@ void emit_function_call(char* result, char* name){
 }
 void emit_return(char* value){
         emit_helper();
+        current->opcode = RETURN;
+        current->operand1 = look_up(cur, name);
         return;
 }
 void emit_reserve(char* result, char* type_name, int size){