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Generate only one var_decl opcodes for each variable declared in a scope

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This commit is contained in:
Ilmir Usmanov 2014-10-09 15:30:30 +04:00
parent 29ffa6f777
commit bfa186d43a
1 changed files with 38 additions and 2 deletions
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40
src/libjsparser/parser.c
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@ -284,6 +284,8 @@ do { \
: I == NESTING_SWITCH \
? "switch" : "unknown")
#define OPCODE_IS(OP, ID) (OP.op_idx == __op__idx_##ID)
typedef enum
{
AL_FUNC_DECL,
@ -2072,7 +2074,7 @@ parse_assignment_expression (void)
if (STACK_TOP (U8))
{
STACK_PUSH (ops, deserialize_opcode (STACK_TOP (U16)));
JERRY_ASSERT (STACK_TOP (ops).op_idx == __op__idx_prop_getter);
JERRY_ASSERT (OPCODE_IS (STACK_TOP (ops), prop_getter));
DECR_OPCODE_COUNTER ();
serializer_set_writing_position (OPCODE_COUNTER ());
NEXT (assignment_expression);
@ -3352,6 +3354,37 @@ skip_parens (void)
STACK_CHECK_USAGE (U8);
}
static bool
var_declared (idx_t var_id)
{
STACK_DECLARE_USAGE (U16)
STACK_DECLARE_USAGE (ops)
bool result = false;
STACK_PUSH (U16, (opcode_counter_t) (OPCODE_COUNTER () - 1));
STACK_PUSH (ops, deserialize_opcode (STACK_TOP (U16)));
while (OPCODE_IS (STACK_TOP (ops), var_decl))
{
if (STACK_TOP (ops).data.var_decl.variable_name == var_id)
{
result = true;
goto cleanup;
}
STACK_DECR_HEAD (U16, 1);
STACK_SET_HEAD (ops, 1, deserialize_opcode (STACK_TOP (U16)));
}
cleanup:
STACK_DROP (U16, 1);
STACK_DROP (ops, 1);
STACK_CHECK_USAGE (U16);
STACK_CHECK_USAGE (ops);
return result;
}
static void
preparse_var_decls (void)
{
@ -3362,7 +3395,10 @@ preparse_var_decls (void)
{
if (token_is (TOK_NAME))
{
DUMP_OPCODE_1 (var_decl, token_data ());
if (!var_declared (token_data ()))
{
DUMP_OPCODE_1 (var_decl, token_data ());
}
skip_token ();
continue;
}