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Implement fast access mode arrays (#3028)

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JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
This commit is contained in:
Robert Fancsik
2019-08-30 15:18:15 +02:00
committed by GitHub
parent c6a4a86257
commit 2f1908f894
15 changed files with 982 additions and 262 deletions
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jerry-core/ecma/base/ecma-helpers.c
-153
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@@ -849,159 +849,6 @@ ecma_delete_property (ecma_object_t *object_p, /**< object */
}
} /* ecma_delete_property */
/**
* Low level delete of array items from new_length to old_length
*
* Note: new_length must be less than old_length
*
* @return the updated value of new_length
*/
uint32_t
ecma_delete_array_properties (ecma_object_t *object_p, /**< object */
uint32_t new_length, /**< new length */
uint32_t old_length) /**< old length */
{
JERRY_ASSERT (new_length < old_length);
/* First the minimum value of new_length is updated. */
jmem_cpointer_t current_prop_cp = object_p->u1.property_list_cp;
if (current_prop_cp == JMEM_CP_NULL)
{
return new_length;
}
ecma_property_header_t *current_prop_p;
#if ENABLED (JERRY_PROPRETY_HASHMAP)
current_prop_p = ECMA_GET_NON_NULL_POINTER (ecma_property_header_t, current_prop_cp);
if (current_prop_p->types[0] == ECMA_PROPERTY_TYPE_HASHMAP)
{
current_prop_cp = current_prop_p->next_property_cp;
}
#endif /* ENABLED (JERRY_PROPRETY_HASHMAP) */
while (current_prop_cp != JMEM_CP_NULL)
{
current_prop_p = ECMA_GET_NON_NULL_POINTER (ecma_property_header_t, current_prop_cp);
JERRY_ASSERT (ECMA_PROPERTY_IS_PROPERTY_PAIR (current_prop_p));
ecma_property_pair_t *prop_pair_p = (ecma_property_pair_t *) current_prop_p;
for (int i = 0; i < ECMA_PROPERTY_PAIR_ITEM_COUNT; i++)
{
if (ECMA_PROPERTY_IS_NAMED_PROPERTY (current_prop_p->types[i])
&& !ecma_is_property_configurable (current_prop_p->types[i]))
{
uint32_t index = ecma_string_get_property_index (current_prop_p->types[i],
prop_pair_p->names_cp[i]);
if (index < old_length && index >= new_length)
{
JERRY_ASSERT (index != ECMA_STRING_NOT_ARRAY_INDEX);
new_length = index + 1;
if (new_length == old_length)
{
/* Early return. */
return new_length;
}
}
}
}
current_prop_cp = current_prop_p->next_property_cp;
}
/* Second all properties between new_length and old_length are deleted. */
current_prop_cp = object_p->u1.property_list_cp;
ecma_property_header_t *prev_prop_p = NULL;
#if ENABLED (JERRY_PROPRETY_HASHMAP)
JERRY_ASSERT (current_prop_cp != JMEM_CP_NULL);
ecma_property_hashmap_delete_status hashmap_status = ECMA_PROPERTY_HASHMAP_DELETE_NO_HASHMAP;
current_prop_p = ECMA_GET_NON_NULL_POINTER (ecma_property_header_t, current_prop_cp);
if (current_prop_p->types[0] == ECMA_PROPERTY_TYPE_HASHMAP)
{
prev_prop_p = current_prop_p;
current_prop_cp = current_prop_p->next_property_cp;
hashmap_status = ECMA_PROPERTY_HASHMAP_DELETE_HAS_HASHMAP;
}
#endif /* ENABLED (JERRY_PROPRETY_HASHMAP) */
while (current_prop_cp != JMEM_CP_NULL)
{
current_prop_p = ECMA_GET_NON_NULL_POINTER (ecma_property_header_t, current_prop_cp);
JERRY_ASSERT (ECMA_PROPERTY_IS_PROPERTY_PAIR (current_prop_p));
ecma_property_pair_t *prop_pair_p = (ecma_property_pair_t *) current_prop_p;
for (int i = 0; i < ECMA_PROPERTY_PAIR_ITEM_COUNT; i++)
{
if (ECMA_PROPERTY_IS_NAMED_PROPERTY (current_prop_p->types[i])
&& ecma_is_property_configurable (current_prop_p->types[i]))
{
uint32_t index = ecma_string_get_property_index (current_prop_p->types[i],
prop_pair_p->names_cp[i]);
if (index < old_length && index >= new_length)
{
JERRY_ASSERT (index != ECMA_STRING_NOT_ARRAY_INDEX);
#if ENABLED (JERRY_PROPRETY_HASHMAP)
if (hashmap_status == ECMA_PROPERTY_HASHMAP_DELETE_HAS_HASHMAP)
{
hashmap_status = ecma_property_hashmap_delete (object_p,
prop_pair_p->names_cp[i],
current_prop_p->types + i);
}
#endif /* ENABLED (JERRY_PROPRETY_HASHMAP) */
ecma_free_property (object_p, prop_pair_p->names_cp[i], current_prop_p->types + i);
current_prop_p->types[i] = ECMA_PROPERTY_TYPE_DELETED;
prop_pair_p->names_cp[i] = LIT_INTERNAL_MAGIC_STRING_DELETED;
}
}
}
if (current_prop_p->types[0] == ECMA_PROPERTY_TYPE_DELETED
&& current_prop_p->types[1] == ECMA_PROPERTY_TYPE_DELETED)
{
if (prev_prop_p == NULL)
{
object_p->u1.property_list_cp = current_prop_p->next_property_cp;
}
else
{
prev_prop_p->next_property_cp = current_prop_p->next_property_cp;
}
jmem_cpointer_t next_prop_cp = current_prop_p->next_property_cp;
ecma_dealloc_property_pair ((ecma_property_pair_t *) current_prop_p);
current_prop_cp = next_prop_cp;
}
else
{
prev_prop_p = current_prop_p;
current_prop_cp = current_prop_p->next_property_cp;
}
}
#if ENABLED (JERRY_PROPRETY_HASHMAP)
if (hashmap_status == ECMA_PROPERTY_HASHMAP_DELETE_RECREATE_HASHMAP)
{
ecma_property_hashmap_free (object_p);
ecma_property_hashmap_create (object_p);
}
#endif /* ENABLED (JERRY_PROPRETY_HASHMAP) */
return new_length;
} /* ecma_delete_array_properties */
/**
* Check whether the object contains a property
*/