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Optimize lexenv binding creation (#4502)

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- Declarative environment no longer need to lookup the created binding for setting it's value
- Unfold vm_decl_var and vm_set_var into vm_loop to reduce error checks
- Reduce code duplication in ecma_module_connect_imports
- Fix deleted binding setting in `ecma_op_set_mutable_binding` (fixes #4468)

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
This commit is contained in:
Robert Fancsik
2021-01-18 17:38:54 +01:00
committed by GitHub
parent 3b77117a2e
commit 2ade072e53
8 changed files with 104 additions and 119 deletions
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jerry-core/ecma/operations/ecma-lex-env.c
+20 -10
View File
@@ -144,10 +144,11 @@ ecma_op_has_binding (ecma_object_t *lex_env_p, /**< lexical environment */
*
* See also: ECMA-262 v5, 10.2.1
*
* @return ecma value
* Returned value must be freed with ecma_free_value
* @return ECMA_PROPERTY_POINTER_ERROR - if the operation raises error
* pointer to the created property - if the binding was created into a declerative environment
* NULL - otherwise
*/
ecma_value_t
ecma_property_t *
ecma_op_create_mutable_binding (ecma_object_t *lex_env_p, /**< lexical environment */
ecma_string_t *name_p, /**< argument N */
bool is_deletable) /**< argument D */
@@ -165,10 +166,13 @@ ecma_op_create_mutable_binding (ecma_object_t *lex_env_p, /**< lexical environme
prop_attributes = (uint8_t) (prop_attributes | ECMA_PROPERTY_FLAG_CONFIGURABLE);
}
ecma_property_t *prop_p;
ecma_create_named_data_property (lex_env_p,
name_p,
prop_attributes,
NULL);
&prop_p);
return prop_p;
}
else
{
@@ -183,22 +187,22 @@ ecma_op_create_mutable_binding (ecma_object_t *lex_env_p, /**< lexical environme
if (ECMA_IS_VALUE_ERROR (result))
{
return result;
return ECMA_PROPERTY_POINTER_ERROR;
}
if (result == ECMA_VALUE_FALSE)
{
return ECMA_VALUE_EMPTY;
return NULL;
}
}
else if (!ecma_op_ordinary_object_is_extensible (binding_obj_p))
{
return ECMA_VALUE_EMPTY;
return NULL;
}
#else /* !ENABLED (JERRY_BUILTIN_PROXY) || !ENABLED (JERRY_BUILTIN_REALMS) */
if (!ecma_op_ordinary_object_is_extensible (binding_obj_p))
{
return ECMA_VALUE_EMPTY;
return NULL;
}
#endif /* ENABLED (JERRY_BUILTIN_PROXY) && ENABLED (JERRY_BUILTIN_REALMS) */
@@ -212,7 +216,7 @@ ecma_op_create_mutable_binding (ecma_object_t *lex_env_p, /**< lexical environme
if (ECMA_IS_VALUE_ERROR (completion))
{
return completion;
return ECMA_PROPERTY_POINTER_ERROR;
}
else
{
@@ -220,7 +224,7 @@ ecma_op_create_mutable_binding (ecma_object_t *lex_env_p, /**< lexical environme
}
}
return ECMA_VALUE_EMPTY;
return NULL;
} /* ecma_op_create_mutable_binding */
/**
@@ -245,6 +249,12 @@ ecma_op_set_mutable_binding (ecma_object_t *lex_env_p, /**< lexical environment
{
ecma_property_t *property_p = ecma_find_named_property (lex_env_p, name_p);
if (JERRY_UNLIKELY (property_p == NULL))
{
property_p = ecma_op_create_mutable_binding (lex_env_p, name_p, is_strict);
JERRY_ASSERT (property_p != ECMA_PROPERTY_POINTER_ERROR);
}
JERRY_ASSERT (property_p != NULL && ECMA_PROPERTY_IS_RAW_DATA (*property_p));
if (ecma_is_property_writable (*property_p))
jerry-core/ecma/operations/ecma-lex-env.h
+1 -1
View File
@@ -56,7 +56,7 @@ ecma_value_t ecma_op_put_value_lex_env_base (ecma_object_t *lex_env_p, ecma_stri
/* ECMA-262 v5, Table 17. Abstract methods of Environment Records */
ecma_value_t ecma_op_has_binding (ecma_object_t *lex_env_p, ecma_string_t *name_p);
ecma_value_t ecma_op_create_mutable_binding (ecma_object_t *lex_env_p, ecma_string_t *name_p, bool is_deletable);
ecma_property_t *ecma_op_create_mutable_binding (ecma_object_t *lex_env_p, ecma_string_t *name_p, bool is_deletable);
ecma_value_t ecma_op_set_mutable_binding (ecma_object_t *lex_env_p, ecma_string_t *name_p, ecma_value_t value,
bool is_strict);
ecma_value_t ecma_op_get_binding_value (ecma_object_t *lex_env_p, ecma_string_t *name_p, bool is_strict);