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Rework map_to member of the scope chain that it can store flags. (#3552)

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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
2020-02-13 17:39:56 +01:00
committed by GitHub
parent 8cd5d06620
commit 4b325ea9e3
7 changed files with 116 additions and 31 deletions
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jerry-core/parser/js/js-parser-internal.h
+24 -4
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@@ -352,8 +352,8 @@ typedef struct parser_branch_node_t
typedef struct
{
uint16_t map_from; /**< original literal index */
uint16_t map_to; /**< register or literal index */
} parser_scope_stack;
uint16_t map_to; /**< encoded register or literal index and flags */
} parser_scope_stack_t;
/**
* This item represents a function literal in the scope stack.
@@ -368,6 +368,25 @@ typedef struct
*/
#define PARSER_SCOPE_STACK_FUNC 0xffff
#if ENABLED (JERRY_ES2015)
/**
* Mask for decoding the register index of map_to
*/
#define PARSER_SCOPE_STACK_REGISTER_MASK 0x3fff
/**
* The scope stack item represents a lexical declaration (let/const)
*/
#define PARSER_SCOPE_STACK_IS_LEXICAL 0x4000
/**
* The scope stack item represents a const declaration
*/
#define PARSER_SCOPE_STACK_IS_CONST 0x8000
#endif /* ENABLED (JERRY_ES2015) */
/**
* Starting literal index for registers.
*/
@@ -416,7 +435,7 @@ typedef struct parser_saved_context_t
parser_mem_data_t byte_code; /**< byte code buffer */
uint32_t byte_code_size; /**< byte code size for branches */
parser_mem_data_t literal_pool_data; /**< literal list */
parser_scope_stack *scope_stack_p; /**< scope stack */
parser_scope_stack_t *scope_stack_p; /**< scope stack */
uint16_t scope_stack_size; /**< size of scope stack */
uint16_t scope_stack_top; /**< preserved top of scope stack */
uint16_t scope_stack_reg_top; /**< preserved top register of scope stack */
@@ -486,7 +505,7 @@ typedef struct
uint32_t byte_code_size; /**< current byte code size for branches */
parser_list_t literal_pool; /**< literal list */
parser_mem_data_t stack; /**< storage space */
parser_scope_stack *scope_stack_p; /**< scope stack */
parser_scope_stack_t *scope_stack_p; /**< scope stack */
parser_mem_page_t *free_page_p; /**< space for fast allocation */
uint16_t scope_stack_size; /**< size of scope stack */
uint16_t scope_stack_top; /**< current top of scope stack */
@@ -713,6 +732,7 @@ void scanner_create_variables (parser_context_t *context_p, uint32_t option_flag
void scanner_get_location (scanner_location_t *location_p, parser_context_t *context_p);
void scanner_set_location (parser_context_t *context_p, scanner_location_t *location_p);
uint16_t scanner_decode_map_to (parser_scope_stack_t *stack_item_p);
void scanner_scan_all (parser_context_t *context_p, const uint8_t *arg_list_p, const uint8_t *arg_list_end_p,
const uint8_t *source_p, const uint8_t *source_end_p);