Fix processing of elision in array literal.

JerryScript-DCO-1.0-Signed-off-by: Andrey Shitov a.shitov@samsung.com

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

@@ -82,6 +82,7 @@ typedef enum
   ECMA_SIMPLE_VALUE_ARRAY_REDIRECT, /**< implementation defined value for an array's elements that exist,
                                          but are stored directly in the array's property list
                                          (used for array elements with non-default attribute values) */
+  ECMA_SIMPLE_VALUE_ARRAY_HOLE, /**< array hole, used for initialization of an array literal */
   ECMA_SIMPLE_VALUE__COUNT /** count of simple ecma-values */
 } ecma_simple_value_t;
 

jerry-core/ecma/base/ecma-helpers-value.cpp

@@ -155,6 +155,19 @@ ecma_is_value_true (ecma_value_t value) /**< ecma-value */
           && ecma_get_value_value_field (value) == ECMA_SIMPLE_VALUE_TRUE);
 } /* ecma_is_value_true */
 
+/**
+ * Check if the value is array hole.
+ *
+ * @return true - if the value contains ecma-array-hole simple value,
+ *         false - otherwise.
+ */
+bool __attr_pure___ __attr_always_inline___
+ecma_is_value_array_hole (ecma_value_t value) /**< ecma-value */
+{
+  return (ecma_get_value_type_field (value) == ECMA_TYPE_SIMPLE
+          && ecma_get_value_value_field (value) == ECMA_SIMPLE_VALUE_ARRAY_HOLE);
+} /* ecma_is_value_array_hole */
+
 /**
  * Check if the value is ecma-number.
  *

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

@@ -58,6 +58,7 @@ extern bool ecma_is_value_undefined (ecma_value_t value);
 extern bool ecma_is_value_null (ecma_value_t value);
 extern bool ecma_is_value_boolean (ecma_value_t value);
 extern bool ecma_is_value_true (ecma_value_t value);
+extern bool ecma_is_value_array_hole (ecma_value_t value);
 
 extern bool ecma_is_value_number (ecma_value_t value);
 extern bool ecma_is_value_string (ecma_value_t value);

jerry-core/ecma/operations/ecma-array-object.cpp

@@ -131,6 +131,11 @@ ecma_op_create_array_object (const ecma_value_t *arguments_list_p, /**< list of
        index < array_items_count;
        index++)
   {
+    if (ecma_is_value_array_hole (array_items_p[index]))
+    {
+      continue;
+    }
+
     ecma_string_t* item_name_string_p = ecma_new_ecma_string_from_uint32 (index);
 
     ecma_property_descriptor_t item_prop_desc = ecma_make_empty_property_descriptor ();