Rework function.bind (#1406)

The new code does not use value collections which reduces the argument array size by half.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

jerry-core/ecma/base/ecma-globals.h

@@ -199,12 +199,6 @@ typedef enum
 {
   ECMA_INTERNAL_PROPERTY_NATIVE_HANDLE, /**< native handle associated with an object */
   ECMA_INTERNAL_PROPERTY_FREE_CALLBACK, /**< object's native free callback */
-
-  /** Bound function internal properties **/
-  ECMA_INTERNAL_PROPERTY_BOUND_FUNCTION_TARGET_FUNCTION,
-  ECMA_INTERNAL_PROPERTY_BOUND_FUNCTION_BOUND_THIS,
-  ECMA_INTERNAL_PROPERTY_BOUND_FUNCTION_BOUND_ARGS,
-
   ECMA_INTERNAL_PROPERTY_INSTANTIATED_MASK_32_63, /**< Bit-mask of non-instantiated
                                                    *   built-in's properties (bits 32-63) */
 
@@ -612,6 +606,15 @@ typedef struct
       uint32_t length; /**< length of names */
     } arguments;
 
+    /*
+     * Description of bound function object.
+     */
+    struct
+    {
+      ecma_value_t target_function; /**< target function */
+      ecma_length_t args_length; /**< length of arguments */
+    } bound_function;
+
     ecma_external_pointer_t external_function; /**< external function */
   } u;
 } ecma_extended_object_t;