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Rework the core of class parsing/runtime semantic (#3598)

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Changes:
 - Use the pre-scanner to provide information for the parser about the existence of the class constructor
 - The allocation of the super declarative environment is no longer needed
 - The VM frame context holds the information about the this binding status
 - Reduce the number of class related VM/CBC instructions
 - Improve ecma_op_function_{construct, call} to properly set new.target

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
This commit is contained in:
Robert Fancsik
2020-03-16 14:37:47 +01:00
committed by GitHub
parent 56b9f098ab
commit bfd2639634
49 changed files with 1671 additions and 1490 deletions
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jerry-core/ecma/operations/ecma-reference.c
+41 -12
View File
@@ -21,6 +21,7 @@
#include "ecma-lcache.h"
#include "ecma-lex-env.h"
#include "ecma-objects.h"
#include "ecma-proxy-object.h"
#include "ecma-reference.h"
#include "jrt.h"
@@ -47,7 +48,7 @@ ecma_op_resolve_reference_base (ecma_object_t *lex_env_p, /**< starting lexical
while (true)
{
#if ENABLED (JERRY_ES2015)
if (ecma_get_lex_env_type (lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_SUPER_OBJECT_BOUND)
if (ecma_get_lex_env_type (lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_HOME_OBJECT_BOUND)
{
JERRY_ASSERT (lex_env_p->u2.outer_reference_cp != JMEM_CP_NULL);
lex_env_p = ECMA_GET_NON_NULL_POINTER (ecma_object_t, lex_env_p->u2.outer_reference_cp);
@@ -79,27 +80,55 @@ ecma_op_resolve_reference_base (ecma_object_t *lex_env_p, /**< starting lexical
#if ENABLED (JERRY_ES2015)
/**
* Resolve super reference.
* Perform GetThisEnvironment and GetSuperBase operations
*
* @return value of the reference
* See also: ECMAScript v6, 8.1.1.3.5
*
* @return ECMA_VALUE_ERROR - if the operation fails
* ECMA_VALUE_UNDEFINED - if the home object is null
* value of the [[HomeObject]].[[Prototype]] internal slot - otherwise
*/
ecma_object_t *
ecma_op_resolve_super_reference_value (ecma_object_t *lex_env_p) /**< starting lexical environment */
ecma_value_t
ecma_op_resolve_super_base (ecma_object_t *lex_env_p) /**< starting lexical environment */
{
JERRY_ASSERT (lex_env_p != NULL);
while (true)
{
JERRY_ASSERT (lex_env_p != NULL);
if (ecma_get_lex_env_type (lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_SUPER_OBJECT_BOUND)
if (ecma_get_lex_env_type (lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_HOME_OBJECT_BOUND)
{
return ecma_get_lex_env_binding_object (lex_env_p);
ecma_object_t *home_p = ECMA_GET_NON_NULL_POINTER (ecma_object_t, lex_env_p->u1.home_object_cp);
#if ENABLED (JERRY_ES2015_BUILTIN_PROXY)
if (ECMA_OBJECT_IS_PROXY (home_p))
{
return ecma_proxy_object_get_prototype_of (home_p);
}
#endif /* ENABLED (JERRY_ES2015_BUILTIN_PROXY) */
jmem_cpointer_t proto_cp = ecma_op_ordinary_object_get_prototype_of (home_p);
if (proto_cp == JMEM_CP_NULL)
{
return ECMA_VALUE_NULL;
}
ecma_object_t *proto_p = ECMA_GET_NON_NULL_POINTER (ecma_object_t, proto_cp);
ecma_ref_object (proto_p);
return ecma_make_object_value (proto_p);
}
JERRY_ASSERT (lex_env_p->u2.outer_reference_cp != JMEM_CP_NULL);
if (lex_env_p->u2.outer_reference_cp == JMEM_CP_NULL)
{
break;
}
lex_env_p = ECMA_GET_NON_NULL_POINTER (ecma_object_t, lex_env_p->u2.outer_reference_cp);
}
} /* ecma_op_resolve_super_reference_value */
return ECMA_VALUE_UNDEFINED;
} /* ecma_op_resolve_super_base */
/**
* Helper method for HasBindig operation
@@ -262,7 +291,7 @@ ecma_op_resolve_reference_value (ecma_object_t *lex_env_p, /**< starting lexical
else
{
#if ENABLED (JERRY_ES2015)
JERRY_ASSERT (lex_env_type == ECMA_LEXICAL_ENVIRONMENT_SUPER_OBJECT_BOUND);
JERRY_ASSERT (lex_env_type == ECMA_LEXICAL_ENVIRONMENT_HOME_OBJECT_BOUND);
#else /* !ENABLED (JERRY_ES2015) */
JERRY_UNREACHABLE ();
#endif /* ENABLED (JERRY_ES2015) */