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Implement argument redefinition with var statement. (#3811)

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JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2020-06-08 13:43:50 +02:00
committed by GitHub
parent a885664220
commit 36bf1ec09d
9 changed files with 155 additions and 11 deletions
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jerry-core/parser/js/js-scanner-util.c
+52 -8
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@@ -148,7 +148,9 @@ scanner_get_stream_size (scanner_info_t *info_p, /**< scanner info block */
#endif /* ENABLED (JERRY_ES2015_MODULE_SYSTEM) */
case SCANNER_STREAM_TYPE_ARG:
#if ENABLED (JERRY_ES2015)
case SCANNER_STREAM_TYPE_ARG_VAR:
case SCANNER_STREAM_TYPE_DESTRUCTURED_ARG:
case SCANNER_STREAM_TYPE_DESTRUCTURED_ARG_VAR:
#endif /* ENABLED (JERRY_ES2015_MODULE_SYSTEM) */
case SCANNER_STREAM_TYPE_ARG_FUNC:
#if ENABLED (JERRY_ES2015)
@@ -555,7 +557,12 @@ scanner_pop_literal_pool (parser_context_t *context_p, /**< context */
continue;
}
type = (uint8_t) ((type & ~SCANNER_LITERAL_IS_FUNC) | SCANNER_LITERAL_IS_VAR);
if (!(type & SCANNER_LITERAL_IS_ARG))
{
type |= SCANNER_LITERAL_IS_VAR;
}
type &= (uint8_t) ~SCANNER_LITERAL_IS_FUNC;
literal_p->type = type;
}
#endif /* ENABLED (JERRY_ES2015) */
@@ -802,6 +809,14 @@ scanner_pop_literal_pool (parser_context_t *context_p, /**< context */
{
type = SCANNER_STREAM_TYPE_DESTRUCTURED_ARG;
}
if (literal_p->type & SCANNER_LITERAL_IS_VAR)
{
type = (uint8_t) (type + 1);
JERRY_ASSERT (type == SCANNER_STREAM_TYPE_ARG_VAR
|| type == SCANNER_STREAM_TYPE_DESTRUCTURED_ARG_VAR);
}
#endif /* ENABLED (JERRY_ES2015) */
}
#if ENABLED (JERRY_ES2015)
@@ -1731,7 +1746,9 @@ scanner_is_context_needed (parser_context_t *context_p, /**< context */
|| type == SCANNER_STREAM_TYPE_CONST
|| type == SCANNER_STREAM_TYPE_LOCAL
|| type == SCANNER_STREAM_TYPE_ARG
|| type == SCANNER_STREAM_TYPE_ARG_VAR
|| type == SCANNER_STREAM_TYPE_DESTRUCTURED_ARG
|| type == SCANNER_STREAM_TYPE_DESTRUCTURED_ARG_VAR
|| type == SCANNER_STREAM_TYPE_ARG_FUNC
|| type == SCANNER_STREAM_TYPE_DESTRUCTURED_ARG_FUNC
|| type == SCANNER_STREAM_TYPE_FUNC);
@@ -1769,16 +1786,13 @@ scanner_is_context_needed (parser_context_t *context_p, /**< context */
if (JERRY_UNLIKELY (check_type == PARSER_CHECK_FUNCTION_CONTEXT))
{
if (SCANNER_STREAM_TYPE_IS_ARG (type))
{
continue;
}
if (SCANNER_STREAM_TYPE_IS_ARG_FUNC (type))
if (SCANNER_STREAM_TYPE_IS_ARG_FUNC (type)
|| type == SCANNER_STREAM_TYPE_ARG_VAR
|| type == SCANNER_STREAM_TYPE_DESTRUCTURED_ARG_VAR)
{
/* The return value is true, if the variable is stored in the lexical environment
* or all registers have already been used for function arguments. This can be
* inprecise in the latter case, but that is a very rare corner case. A more
* inprecise in the latter case, but this is a very rare corner case. A more
* sophisticated check would require to decode the literal. */
if ((data & SCANNER_STREAM_NO_REG)
|| scope_stack_reg_top >= PARSER_MAXIMUM_NUMBER_OF_REGISTERS)
@@ -1787,6 +1801,11 @@ scanner_is_context_needed (parser_context_t *context_p, /**< context */
}
continue;
}
if (SCANNER_STREAM_TYPE_IS_ARG (type))
{
continue;
}
}
#endif /* ENABLED (JERRY_ES2015) */
@@ -2072,6 +2091,24 @@ scanner_create_variables (parser_context_t *context_p, /**< context */
{
if (option_flags & SCANNER_CREATE_VARS_IS_FUNCTION_BODY)
{
#if ENABLED (JERRY_ES2015)
if ((context_p->status_flags & PARSER_LEXICAL_BLOCK_NEEDED)
&& (type == SCANNER_STREAM_TYPE_ARG_VAR || type == SCANNER_STREAM_TYPE_DESTRUCTURED_ARG_VAR))
{
literal.length = data_p[1];
literal.type = LEXER_IDENT_LITERAL;
literal.has_escape = (data_p[0] & SCANNER_STREAM_HAS_ESCAPE) ? 1 : 0;
/* Literal must be exists. */
lexer_construct_literal_object (context_p, &literal, LEXER_IDENT_LITERAL);
if (context_p->lit_object.index < PARSER_REGISTER_START)
{
parser_emit_cbc_ext_literal_from_token (context_p, CBC_EXT_COPY_FROM_ARG);
}
}
#endif /* ENABLED (JERRY_ES2015) */
literal.char_p += data_p[1];
continue;
}
@@ -2174,7 +2211,9 @@ scanner_create_variables (parser_context_t *context_p, /**< context */
}
case SCANNER_STREAM_TYPE_LET:
case SCANNER_STREAM_TYPE_ARG:
case SCANNER_STREAM_TYPE_ARG_VAR:
case SCANNER_STREAM_TYPE_DESTRUCTURED_ARG:
case SCANNER_STREAM_TYPE_DESTRUCTURED_ARG_VAR:
case SCANNER_STREAM_TYPE_ARG_FUNC:
case SCANNER_STREAM_TYPE_DESTRUCTURED_ARG_FUNC:
{
@@ -2208,6 +2247,7 @@ scanner_create_variables (parser_context_t *context_p, /**< context */
case SCANNER_STREAM_TYPE_LET:
case SCANNER_STREAM_TYPE_CONST:
case SCANNER_STREAM_TYPE_DESTRUCTURED_ARG:
case SCANNER_STREAM_TYPE_DESTRUCTURED_ARG_VAR:
case SCANNER_STREAM_TYPE_DESTRUCTURED_ARG_FUNC:
{
scope_stack_map_to |= PARSER_SCOPE_STACK_NO_FUNCTION_COPY;
@@ -2261,6 +2301,7 @@ scanner_create_variables (parser_context_t *context_p, /**< context */
{
JERRY_ASSERT (type == SCANNER_STREAM_TYPE_LOCAL
|| type == SCANNER_STREAM_TYPE_DESTRUCTURED_ARG
|| type == SCANNER_STREAM_TYPE_DESTRUCTURED_ARG_VAR
|| type == SCANNER_STREAM_TYPE_DESTRUCTURED_ARG_FUNC);
opcode = CBC_CREATE_LOCAL;
@@ -2276,6 +2317,9 @@ scanner_create_variables (parser_context_t *context_p, /**< context */
break;
}
case SCANNER_STREAM_TYPE_ARG:
#if ENABLED (JERRY_ES2015)
case SCANNER_STREAM_TYPE_ARG_VAR:
#endif /* ENABLED (JERRY_ES2015) */
case SCANNER_STREAM_TYPE_ARG_FUNC:
{
#if ENABLED (JERRY_PARSER_DUMP_BYTE_CODE)