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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
Download Patch File Download Diff File Expand all files Collapse all files
jerry-core/parser/js/js-parser.c
+10 -16
View File
@@ -27,8 +27,8 @@ JERRY_STATIC_ASSERT ((int) ECMA_PARSE_STRICT_MODE == (int) PARSER_IS_STRICT,
ecma_parse_strict_mode_must_be_equal_to_parser_is_strict);
#if ENABLED (JERRY_ES2015)
JERRY_STATIC_ASSERT ((ECMA_PARSE_CLASS_CONSTRUCTOR << PARSER_CLASS_PARSE_OPTS_OFFSET) == PARSER_CLASS_CONSTRUCTOR,
ecma_class_parse_options_must_be_able_to_be_shifted_to_ecma_general_flags);
JERRY_STATIC_ASSERT ((ECMA_PARSE_CLASS_CONSTRUCTOR << PARSER_SAVED_FLAGS_OFFSET) == PARSER_CLASS_CONSTRUCTOR,
ecma_saved_parse_options_must_be_transformed_to_ecma_general_flags);
#endif /* ENABLED (JERRY_ES2015) */
/** \addtogroup parser Parser
@@ -675,7 +675,7 @@ parse_print_final_cbc (ecma_compiled_code_t *compiled_code_p, /**< compiled code
JERRY_DEBUG_MSG (",arrow");
}
if (compiled_code_p->status_flags & CBC_CODE_FLAGS_CONSTRUCTOR)
if (compiled_code_p->status_flags & CBC_CODE_FLAGS_CLASS_CONSTRUCTOR)
{
JERRY_DEBUG_MSG (",constructor");
}
@@ -994,8 +994,7 @@ parser_post_processing (parser_context_t *context_p) /**< context */
length++;
#if ENABLED (JERRY_ES2015)
if (ext_opcode == CBC_EXT_CONSTRUCTOR_RETURN
|| ext_opcode == CBC_EXT_RETURN_PROMISE)
if (ext_opcode == CBC_EXT_RETURN_PROMISE)
{
last_opcode = CBC_RETURN;
}
@@ -1294,7 +1293,7 @@ parser_post_processing (parser_context_t *context_p) /**< context */
if (context_p->status_flags & PARSER_CLASS_CONSTRUCTOR)
{
compiled_code_p->status_flags |= CBC_CODE_FLAGS_CONSTRUCTOR;
compiled_code_p->status_flags |= CBC_CODE_FLAGS_CLASS_CONSTRUCTOR;
}
if (context_p->status_flags & PARSER_IS_GENERATOR_FUNCTION)
@@ -1936,7 +1935,7 @@ parser_parse_source (const uint8_t *arg_list_p, /**< function argument list */
}
#if ENABLED (JERRY_ES2015)
context.status_flags |= PARSER_GET_CLASS_PARSER_OPTS (parse_opts);
context.status_flags |= PARSER_GET_SAVED_FLAGS (parse_opts);
context.tagged_template_literal_cp = JMEM_CP_NULL;
#endif /* ENABLED (JERRY_ES2015) */
@@ -2374,13 +2373,6 @@ parser_parse_function (parser_context_t *context_p, /**< context */
}
lexer_next_token (context_p);
#if ENABLED (JERRY_ES2015)
if ((context_p->status_flags & PARSER_CLASS_CONSTRUCTOR_SUPER) == PARSER_CLASS_CONSTRUCTOR_SUPER)
{
context_p->status_flags |= PARSER_LEXICAL_ENV_NEEDED;
}
#endif /* ENABLED (JERRY_ES2015) */
parser_parse_statements (context_p);
compiled_code_p = parser_post_processing (context_p);
@@ -2416,12 +2408,14 @@ parser_parse_arrow_function (parser_context_t *context_p, /**< context */
parser_saved_context_t saved_context;
ecma_compiled_code_t *compiled_code_p;
JERRY_ASSERT ((status_flags & PARSER_IS_FUNCTION)
JERRY_ASSERT (!(status_flags & PARSER_IS_FUNCTION)
&& (status_flags & PARSER_IS_ARROW_FUNCTION));
parser_save_context (context_p, &saved_context);
context_p->status_flags |= status_flags;
#if ENABLED (JERRY_ES2015)
context_p->status_flags |= saved_context.status_flags & PARSER_CLASS_HAS_SUPER;
context_p->status_flags |= saved_context.status_flags & (PARSER_IS_FUNCTION
| PARSER_ALLOW_SUPER
| PARSER_ALLOW_SUPER_CALL);
#endif /* ENABLED (JERRY_ES2015) */
#if ENABLED (JERRY_PARSER_DUMP_BYTE_CODE)