Rework array hole calculation for fast access mode arrays (#3248)

This patch gives possibility to Array.prototype builtin routine optimizations.

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu

jerry-core/vm/opcodes.h

@@ -93,6 +93,9 @@ vm_op_delete_var (ecma_value_t name_literal, ecma_object_t *lex_env_p);
 ecma_collection_t *
 opfunc_for_in (ecma_value_t left_value, ecma_value_t *result_obj_p);
 
+void
+opfunc_append_array (ecma_value_t *stack_top_p, uint8_t values_length);
+
 /**
  * @}
  * @}