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Introduce parser-time optimization that moves function's argument values to registers.

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For functions with the optimization applied:
 - vm puts arguments values immediately to registers without putting them to variables in lexical environment;
 - number of arguments is extracted from corresponding 'reg_var_decl' instruction's argument;
 - for functions that also don't have local variables, lexical environments are not created.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
This commit is contained in:
Ruben Ayrapetyan 2015-10-26 16:23:06 +03:00
parent 46c65985e5
commit 1fe2817457
16 changed files with 604 additions and 194 deletions
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163
jerry-core/ecma/operations/ecma-function-object.cpp
View File

@ -46,14 +46,21 @@ static uint32_t
ecma_pack_code_internal_property_value (bool is_strict, /**< is code strict? */
bool do_instantiate_args_obj, /**< should an Arguments object be
* instantiated for the code */
bool is_arguments_moved_to_regs, /**< values of the function's arguments
* are placed on registers */
bool is_no_lex_env, /**< the function needs no lexical environment */
vm_instr_counter_t instr_oc) /**< position of first instruction */
{
uint32_t value = instr_oc;
const uint32_t is_strict_bit_offset = (uint32_t) (sizeof (value) * JERRY_BITSINBYTE - 1);
const uint32_t do_instantiate_arguments_object_bit_offset = (uint32_t) (sizeof (value) * JERRY_BITSINBYTE - 2);
const uint32_t arguments_moved_to_regs_bit_offset = (uint32_t) (sizeof (value) * JERRY_BITSINBYTE - 3);
const uint32_t no_lex_env_bit_offset = (uint32_t) (sizeof (value) * JERRY_BITSINBYTE - 4);
JERRY_ASSERT (((value) & (1u << is_strict_bit_offset)) == 0);
JERRY_ASSERT (((value) & (1u << do_instantiate_arguments_object_bit_offset)) == 0);
JERRY_ASSERT (((value) & (1u << arguments_moved_to_regs_bit_offset)) == 0);
JERRY_ASSERT (((value) & (1u << no_lex_env_bit_offset)) == 0);
if (is_strict)
{
@ -65,6 +72,16 @@ ecma_pack_code_internal_property_value (bool is_strict, /**< is code strict? */
value |= (1u << do_instantiate_arguments_object_bit_offset);
}
if (is_arguments_moved_to_regs)
{
value |= (1u << arguments_moved_to_regs_bit_offset);
}
if (is_no_lex_env)
{
value |= (1u << no_lex_env_bit_offset);
}
return value;
} /* ecma_pack_code_internal_property_value */
@ -77,18 +94,31 @@ ecma_pack_code_internal_property_value (bool is_strict, /**< is code strict? */
static vm_instr_counter_t
ecma_unpack_code_internal_property_value (uint32_t value, /**< packed value */
bool* out_is_strict_p, /**< out: is code strict? */
bool* out_do_instantiate_args_obj_p) /**< should an Arguments object be
bool* out_do_instantiate_args_obj_p, /**< should an Arguments object be
* instantiated for the code */
bool* out_is_arguments_moved_to_regs_p, /**< values of the function's
* arguments are placed
* on registers */
bool* out_is_no_lex_env_p) /**< the function needs no lexical environment */
{
JERRY_ASSERT (out_is_strict_p != NULL);
JERRY_ASSERT (out_do_instantiate_args_obj_p != NULL);
JERRY_ASSERT (out_is_arguments_moved_to_regs_p != NULL);
JERRY_ASSERT (out_is_no_lex_env_p != NULL);
const uint32_t is_strict_bit_offset = (uint32_t) (sizeof (value) * JERRY_BITSINBYTE - 1);
const uint32_t do_instantiate_arguments_object_bit_offset = (uint32_t) (sizeof (value) * JERRY_BITSINBYTE - 2);
const uint32_t is_arguments_moved_to_regs_bit_offset = (uint32_t) (sizeof (value) * JERRY_BITSINBYTE - 3);
const uint32_t is_no_lex_env_bit_offset = (uint32_t) (sizeof (value) * JERRY_BITSINBYTE - 4);
*out_is_strict_p = ((value & (1u << is_strict_bit_offset)) != 0);
*out_do_instantiate_args_obj_p = ((value & (1u << do_instantiate_arguments_object_bit_offset)) != 0);
value &= ~((1u << is_strict_bit_offset) | (1u << do_instantiate_arguments_object_bit_offset));
*out_is_arguments_moved_to_regs_p = ((value & (1u << is_arguments_moved_to_regs_bit_offset)) != 0);
*out_is_no_lex_env_p = ((value & (1u << is_no_lex_env_bit_offset)) != 0);
value &= ~((1u << is_strict_bit_offset)
| (1u << do_instantiate_arguments_object_bit_offset)
| (1u << is_arguments_moved_to_regs_bit_offset)
| (1u << is_no_lex_env_bit_offset));
return (vm_instr_counter_t) value;
} /* ecma_unpack_code_internal_property_value */
@ -221,6 +251,8 @@ ecma_op_create_function_object (ecma_collection_header_t *formal_params_collecti
{
bool is_strict_mode_code = is_decl_in_strict_mode;
bool do_instantiate_arguments_object = true;
bool is_arguments_moved_to_regs = false;
bool is_no_lex_env = false;
vm_instr_counter_t instr_pos = first_instr_pos;
opcode_scope_code_flags_t scope_flags = vm_get_scope_flags (bytecode_header_p, instr_pos++);
@ -229,6 +261,7 @@ ecma_op_create_function_object (ecma_collection_header_t *formal_params_collecti
{
is_strict_mode_code = true;
}
if ((scope_flags & OPCODE_SCOPE_CODE_FLAGS_NOT_REF_ARGUMENTS_IDENTIFIER)
&& (scope_flags & OPCODE_SCOPE_CODE_FLAGS_NOT_REF_EVAL_IDENTIFIER))
{
@ -238,6 +271,16 @@ ecma_op_create_function_object (ecma_collection_header_t *formal_params_collecti
do_instantiate_arguments_object = false;
}
if (scope_flags & OPCODE_SCOPE_CODE_FLAGS_ARGUMENTS_ON_REGISTERS)
{
is_arguments_moved_to_regs = true;
}
if (scope_flags & OPCODE_SCOPE_CODE_FLAGS_NO_LEX_ENV)
{
is_no_lex_env = true;
}
// 1., 4., 13.
ecma_object_t *prototype_obj_p = ecma_builtin_get (ECMA_BUILTIN_ID_FUNCTION_PROTOTYPE);
@ -279,6 +322,8 @@ ecma_op_create_function_object (ecma_collection_header_t *formal_params_collecti
ecma_property_t *code_prop_p = ecma_create_internal_property (f, ECMA_INTERNAL_PROPERTY_CODE_FLAGS_AND_OFFSET);
code_prop_p->u.internal_property.value = ecma_pack_code_internal_property_value (is_strict_mode_code,
do_instantiate_arguments_object,
is_arguments_moved_to_regs,
is_no_lex_env,
instr_pos);
// 14.
@ -405,7 +450,26 @@ ecma_op_function_try_lazy_instantiate_property (ecma_object_t *obj_p, /**< the f
ECMA_INTERNAL_PROPERTY_FORMAL_PARAMETERS);
if (formal_parameters_prop_p == NULL)
{
*len_p = 0;
ecma_property_t *bytecode_prop_p = ecma_get_internal_property (obj_p, ECMA_INTERNAL_PROPERTY_CODE_BYTECODE);
ecma_property_t *code_prop_p = ecma_get_internal_property (obj_p, ECMA_INTERNAL_PROPERTY_CODE_FLAGS_AND_OFFSET);
uint32_t code_prop_value = code_prop_p->u.internal_property.value;
bool is_strict;
bool do_instantiate_args_obj;
bool is_arguments_moved_to_regs;
bool is_no_lex_env;
const bytecode_data_header_t *bytecode_header_p;
bytecode_header_p = MEM_CP_GET_POINTER (const bytecode_data_header_t, bytecode_prop_p->u.internal_property.value);
vm_instr_counter_t code_first_instr_pos = ecma_unpack_code_internal_property_value (code_prop_value,
&is_strict,
&do_instantiate_args_obj,
&is_arguments_moved_to_regs,
&is_no_lex_env);
*len_p = vm_get_scope_args_num (bytecode_header_p, code_first_instr_pos);
}
else
{
@ -871,11 +935,17 @@ ecma_op_function_call (ecma_object_t *func_obj_p, /**< Function object */
// 8.
bool is_strict;
bool do_instantiate_args_obj;
bool is_arguments_moved_to_regs;
bool is_no_lex_env;
const bytecode_data_header_t *bytecode_data_p;
bytecode_data_p = MEM_CP_GET_POINTER (const bytecode_data_header_t, bytecode_prop_p->u.internal_property.value);
vm_instr_counter_t code_first_instr_pos = ecma_unpack_code_internal_property_value (code_prop_value,
&is_strict,
&do_instantiate_args_obj);
&do_instantiate_args_obj,
&is_arguments_moved_to_regs,
&is_no_lex_env);
ecma_value_t this_binding;
// 1.
@ -899,36 +969,75 @@ ecma_op_function_call (ecma_object_t *func_obj_p, /**< Function object */
}
// 5.
ecma_object_t *local_env_p = ecma_create_decl_lex_env (scope_p);
// 9.
ECMA_TRY_CATCH (args_var_declaration_ret,
ecma_function_call_setup_args_variables (func_obj_p,
local_env_p,
arg_collection_p,
is_strict,
do_instantiate_args_obj),
ret_value);
ecma_completion_value_t completion = vm_run_from_pos (bytecode_data_p,
code_first_instr_pos,
this_binding,
local_env_p,
is_strict,
false);
if (ecma_is_completion_value_return (completion))
ecma_object_t *local_env_p;
if (is_no_lex_env)
{
ret_value = ecma_make_normal_completion_value (ecma_get_completion_value_value (completion));
local_env_p = scope_p;
}
else
{
ret_value = completion;
local_env_p = ecma_create_decl_lex_env (scope_p);
}
ECMA_FINALIZE (args_var_declaration_ret);
if (is_arguments_moved_to_regs)
{
ecma_completion_value_t completion = vm_run_from_pos (bytecode_data_p,
code_first_instr_pos,
this_binding,
local_env_p,
is_strict,
false,
arg_collection_p);
if (ecma_is_completion_value_return (completion))
{
ret_value = ecma_make_normal_completion_value (ecma_get_completion_value_value (completion));
}
else
{
ret_value = completion;
}
}
else
{
// 9.
ECMA_TRY_CATCH (args_var_declaration_ret,
ecma_function_call_setup_args_variables (func_obj_p,
local_env_p,
arg_collection_p,
is_strict,
do_instantiate_args_obj),
ret_value);
ecma_completion_value_t completion = vm_run_from_pos (bytecode_data_p,
code_first_instr_pos,
this_binding,
local_env_p,
is_strict,
false,
NULL);
if (ecma_is_completion_value_return (completion))
{
ret_value = ecma_make_normal_completion_value (ecma_get_completion_value_value (completion));
}
else
{
ret_value = completion;
}
ECMA_FINALIZE (args_var_declaration_ret);
}
if (is_no_lex_env)
{
/* do nothing */
}
else
{
ecma_deref_object (local_env_p);
}
ecma_deref_object (local_env_p);
ecma_free_value (this_binding, true);
}
}

272
jerry-core/parser/js/opcodes-dumper.cpp
View File

@ -42,10 +42,24 @@ static vm_idx_t jsp_reg_max_for_temps;
* so the value, if not equal to VM_IDX_EMPTY, is always greater than jsp_reg_max_for_temps.
*
* See also:
* dumper_try_replace_var_with_reg
* dumper_try_replace_identifier_name_with_reg
*/
static vm_idx_t jsp_reg_max_for_local_var;
/**
* Maximum identifier of a register, allocated for storage of an argument value.
*
* The value can be VM_IDX_EMPTY, indicating that no registers were allocated for argument values.
*
* Note:
* Registers for argument values are always allocated after registers for variable values,
* so the value, if not equal to VM_IDX_EMPTY, is always greater than jsp_reg_max_for_local_var.
*
* See also:
* dumper_try_replace_identifier_name_with_reg
*/
static vm_idx_t jsp_reg_max_for_args;
enum
{
U8_global_size
@ -130,12 +144,6 @@ enum
};
STATIC_STACK (jsp_reg_id_stack, vm_idx_t)
enum
{
reg_var_decls_global_size
};
STATIC_STACK (reg_var_decls, vm_instr_counter_t)
/**
* Allocate next register for intermediate value
*
@ -145,6 +153,7 @@ static vm_idx_t
jsp_alloc_reg_for_temp (void)
{
JERRY_ASSERT (jsp_reg_max_for_local_var == VM_IDX_EMPTY);
JERRY_ASSERT (jsp_reg_max_for_args == VM_IDX_EMPTY);
vm_idx_t next_reg = jsp_reg_next++;
@ -166,6 +175,51 @@ jsp_alloc_reg_for_temp (void)
} /* jsp_alloc_reg_for_temp */
#ifdef CONFIG_PARSER_ENABLE_PARSE_TIME_BYTE_CODE_OPTIMIZER
/**
* Start move of variable values to registers optimization pass
*/
void
dumper_start_move_of_vars_to_regs ()
{
JERRY_ASSERT (jsp_reg_max_for_local_var == VM_IDX_EMPTY);
JERRY_ASSERT (jsp_reg_max_for_args == VM_IDX_EMPTY);
jsp_reg_max_for_local_var = jsp_reg_max_for_temps;
} /* dumper_start_move_of_vars_to_regs */
/**
* Start move of argument values to registers optimization pass
*
* @return true - if optimization can be performed successfully (i.e. there are enough free registers),
* false - otherwise.
*/
bool
dumper_start_move_of_args_to_regs (uint32_t args_num) /**< number of arguments */
{
JERRY_ASSERT (jsp_reg_max_for_args == VM_IDX_EMPTY);
if (jsp_reg_max_for_local_var == VM_IDX_EMPTY)
{
if (args_num + jsp_reg_max_for_temps >= VM_REG_GENERAL_LAST)
{
return false;
}
jsp_reg_max_for_args = jsp_reg_max_for_temps;
}
else
{
if (args_num + jsp_reg_max_for_local_var >= VM_REG_GENERAL_LAST)
{
return false;
}
jsp_reg_max_for_args = jsp_reg_max_for_local_var;
}
return true;
} /* dumper_start_move_of_args_to_regs */
/**
* Try to move local variable to a register
*
@ -183,72 +237,63 @@ jsp_alloc_reg_for_temp (void)
* false - otherwise.
*/
bool
dumper_try_replace_var_with_reg (scopes_tree tree, /**< a function scope, created for
* function declaration or function expresssion */
op_meta *var_decl_om_p) /**< operation meta of corresponding variable declaration */
dumper_try_replace_identifier_name_with_reg (scopes_tree tree, /**< a function scope, created for
* function declaration or function expresssion */
op_meta *om_p) /**< operation meta of corresponding
* variable declaration */
{
JERRY_ASSERT (tree->type == SCOPE_TYPE_FUNCTION);
JERRY_ASSERT (var_decl_om_p->op.op_idx == VM_OP_VAR_DECL);
JERRY_ASSERT (var_decl_om_p->lit_id[0].packed_value != NOT_A_LITERAL.packed_value);
JERRY_ASSERT (var_decl_om_p->lit_id[1].packed_value == NOT_A_LITERAL.packed_value);
JERRY_ASSERT (var_decl_om_p->lit_id[2].packed_value == NOT_A_LITERAL.packed_value);
lit_cpointer_t lit_cp;
bool is_arg;
vm_instr_counter_t instr_pos = 0;
op_meta header_opm = scopes_tree_op_meta (tree, instr_pos++);
JERRY_ASSERT (header_opm.op.op_idx == VM_OP_FUNC_EXPR_N || header_opm.op.op_idx == VM_OP_FUNC_DECL_N);
while (true)
if (om_p->op.op_idx == VM_OP_VAR_DECL)
{
op_meta meta_opm = scopes_tree_op_meta (tree, instr_pos++);
JERRY_ASSERT (meta_opm.op.op_idx == VM_OP_META);
JERRY_ASSERT (om_p->lit_id[0].packed_value != NOT_A_LITERAL.packed_value);
JERRY_ASSERT (om_p->lit_id[1].packed_value == NOT_A_LITERAL.packed_value);
JERRY_ASSERT (om_p->lit_id[2].packed_value == NOT_A_LITERAL.packed_value);
opcode_meta_type meta_type = (opcode_meta_type) meta_opm.op.data.meta.type;
lit_cp = om_p->lit_id[0];
if (meta_type == OPCODE_META_TYPE_FUNCTION_END)
is_arg = false;
}
else
{
JERRY_ASSERT (om_p->op.op_idx == VM_OP_META);
JERRY_ASSERT (om_p->op.data.meta.type == OPCODE_META_TYPE_VARG);
JERRY_ASSERT (om_p->lit_id[0].packed_value == NOT_A_LITERAL.packed_value);
JERRY_ASSERT (om_p->lit_id[1].packed_value != NOT_A_LITERAL.packed_value);
JERRY_ASSERT (om_p->lit_id[2].packed_value == NOT_A_LITERAL.packed_value);
lit_cp = om_p->lit_id[1];
is_arg = true;
}
vm_idx_t reg;
if (is_arg)
{
JERRY_ASSERT (jsp_reg_max_for_args != VM_IDX_EMPTY);
JERRY_ASSERT (jsp_reg_max_for_args < VM_REG_GENERAL_LAST);
reg = ++jsp_reg_max_for_args;
}
else
{
JERRY_ASSERT (jsp_reg_max_for_local_var != VM_IDX_EMPTY);
if (jsp_reg_max_for_local_var == VM_REG_GENERAL_LAST)
{
/* marker of function argument list end reached */
break;
/* not enough registers */
return false;
}
else
{
JERRY_ASSERT (meta_type == OPCODE_META_TYPE_VARG);
JERRY_ASSERT (jsp_reg_max_for_local_var < VM_REG_GENERAL_LAST);
/* the varg specifies argument name, and so should be a string literal */
JERRY_ASSERT (meta_opm.op.data.meta.data_1 == VM_IDX_REWRITE_LITERAL_UID);
JERRY_ASSERT (meta_opm.lit_id[1].packed_value != NOT_A_LITERAL.packed_value);
if (meta_opm.lit_id[1].packed_value == var_decl_om_p->lit_id[0].packed_value)
{
/*
* Optimization is not performed, because the variable's name is equal to an argument name,
* and the argument's value would be initialized by its name in run-time.
*
* See also:
* parser_parse_program
*/
return false;
}
}
reg = ++jsp_reg_max_for_local_var;
}
if (jsp_reg_max_for_local_var == VM_IDX_EMPTY)
{
jsp_reg_max_for_local_var = jsp_reg_max_for_temps;
}
if (jsp_reg_max_for_local_var == VM_REG_GENERAL_LAST)
{
/* not enough registers */
return false;
}
JERRY_ASSERT (jsp_reg_max_for_local_var < VM_REG_GENERAL_LAST);
vm_idx_t reg = ++jsp_reg_max_for_local_var;
lit_cpointer_t lit_cp = var_decl_om_p->lit_id[0];
for (vm_instr_counter_t instr_pos = 0;
instr_pos < tree->instrs_count;
instr_pos++)
@ -320,9 +365,21 @@ dumper_try_replace_var_with_reg (scopes_tree tree, /**< a function scope, create
}
return true;
} /* dumper_try_replace_var_with_reg */
} /* dumper_try_replace_identifier_name_with_reg */
#endif /* CONFIG_PARSER_ENABLE_PARSE_TIME_BYTE_CODE_OPTIMIZER */
/**
* Just allocate register for argument that is never used due to duplicated argument names
*/
void
dumper_alloc_reg_for_unused_arg (void)
{
JERRY_ASSERT (jsp_reg_max_for_args != VM_IDX_EMPTY);
JERRY_ASSERT (jsp_reg_max_for_args < VM_REG_GENERAL_LAST);
++jsp_reg_max_for_args;
} /* dumper_alloc_reg_for_unused_arg */
/**
* Generate instruction with specified opcode and operands
*
@ -650,6 +707,7 @@ void
dumper_new_scope (void)
{
JERRY_ASSERT (jsp_reg_max_for_local_var == VM_IDX_EMPTY);
JERRY_ASSERT (jsp_reg_max_for_args == VM_IDX_EMPTY);
STACK_PUSH (jsp_reg_id_stack, jsp_reg_next);
STACK_PUSH (jsp_reg_id_stack, jsp_reg_max_for_temps);
@ -662,6 +720,7 @@ void
dumper_finish_scope (void)
{
JERRY_ASSERT (jsp_reg_max_for_local_var == VM_IDX_EMPTY);
JERRY_ASSERT (jsp_reg_max_for_args == VM_IDX_EMPTY);
jsp_reg_max_for_temps = STACK_TOP (jsp_reg_id_stack);
STACK_DROP (jsp_reg_id_stack, 1);
@ -1182,6 +1241,23 @@ rewrite_function_end ()
STACK_DROP (function_ends, 1);
}
/**
* Decrement position of 'function_end' instruction (the position is stored in "function_ends" stack)
*
* Note:
* The operation is used upon deleting a 'varg' meta, describing element of a function's formal parameters list
*/
void
dumper_decrement_function_end_pos (void)
{
vm_instr_counter_t oc = STACK_TOP (function_ends);
oc--;
STACK_DROP (function_ends, 1);
STACK_PUSH (function_ends, oc);
} /* dumper_decrement_function_end_pos */
jsp_operand_t
dump_this_res (void)
{
@ -2308,27 +2384,6 @@ dump_throw (jsp_operand_t op)
dump_single_address (VM_OP_THROW_VALUE, op);
}
/**
* Checks if variable is already declared
*
* @return true if variable declaration already exists
* false otherwise
*/
bool
dumper_variable_declaration_exists (lit_cpointer_t lit_id) /**< literal which holds variable's name */
{
vm_instr_counter_t var_decls_count = (vm_instr_counter_t) serializer_get_current_var_decls_counter ();
for (vm_instr_counter_t oc = (vm_instr_counter_t) (0); oc < var_decls_count; oc++)
{
const op_meta var_decl_op_meta = serializer_get_var_decl (oc);
if (var_decl_op_meta.lit_id[0].packed_value == lit_id.packed_value)
{
return true;
}
}
return false;
} /* dumper_variable_declaration_exists */
/**
* Dump instruction designating variable declaration
*/
@ -2386,20 +2441,30 @@ dump_ret (void)
serializer_dump_op_meta (jsp_dmp_create_op_meta_0 (VM_OP_RET));
}
void
/**
* Dump 'reg_var_decl' instruction template
*
* @return position of the dumped instruction
*/
vm_instr_counter_t
dump_reg_var_decl_for_rewrite (void)
{
STACK_PUSH (reg_var_decls, serializer_get_current_instr_counter ());
dump_double_address (VM_OP_REG_VAR_DECL,
vm_instr_counter_t oc = serializer_get_current_instr_counter ();
dump_triple_address (VM_OP_REG_VAR_DECL,
jsp_operand_t::make_unknown_operand (),
jsp_operand_t::make_unknown_operand (),
jsp_operand_t::make_unknown_operand ());
}
return oc;
} /* dump_reg_var_decl_for_rewrite */
/**
* Rewrite 'reg_var_decl' instruction's template with current scope's register counts
*/
void
rewrite_reg_var_decl (void)
rewrite_reg_var_decl (vm_instr_counter_t reg_var_decl_oc) /**< position of dumped 'reg_var_decl' template */
{
vm_instr_counter_t reg_var_decl_oc = STACK_TOP (reg_var_decls);
op_meta opm = serializer_get_op_meta (reg_var_decl_oc);
JERRY_ASSERT (opm.op.op_idx == VM_OP_REG_VAR_DECL);
@ -2417,10 +2482,28 @@ rewrite_reg_var_decl (void)
opm.op.data.reg_var_decl.local_var_regs_num = 0;
}
serializer_rewrite_op_meta (reg_var_decl_oc, opm);
if (jsp_reg_max_for_args != VM_IDX_EMPTY)
{
if (jsp_reg_max_for_local_var != VM_IDX_EMPTY)
{
JERRY_ASSERT (jsp_reg_max_for_args >= jsp_reg_max_for_local_var);
opm.op.data.reg_var_decl.arg_regs_num = (vm_idx_t) (jsp_reg_max_for_args - jsp_reg_max_for_local_var);
}
else
{
JERRY_ASSERT (jsp_reg_max_for_args >= jsp_reg_max_for_temps);
opm.op.data.reg_var_decl.arg_regs_num = (vm_idx_t) (jsp_reg_max_for_args - jsp_reg_max_for_temps);
}
STACK_DROP (reg_var_decls, 1);
}
jsp_reg_max_for_args = VM_IDX_EMPTY;
}
else
{
opm.op.data.reg_var_decl.arg_regs_num = 0;
}
serializer_rewrite_op_meta (reg_var_decl_oc, opm);
} /* rewrite_reg_var_decl */
void
dump_retval (jsp_operand_t op)
@ -2434,6 +2517,7 @@ dumper_init (void)
jsp_reg_next = VM_REG_GENERAL_FIRST;
jsp_reg_max_for_temps = VM_REG_GENERAL_FIRST;
jsp_reg_max_for_local_var = VM_IDX_EMPTY;
jsp_reg_max_for_args = VM_IDX_EMPTY;
STACK_INIT (U8);
STACK_INIT (varg_headers);
@ -2449,7 +2533,6 @@ dumper_init (void)
STACK_INIT (finallies);
STACK_INIT (tries);
STACK_INIT (jsp_reg_id_stack);
STACK_INIT (reg_var_decls);
}
void
@ -2469,5 +2552,4 @@ dumper_free (void)
STACK_FREE (finallies);
STACK_FREE (tries);
STACK_FREE (jsp_reg_id_stack);
STACK_FREE (reg_var_decls);
}

11
jerry-core/parser/js/opcodes-dumper.h
View File

@ -305,7 +305,10 @@ bool operand_is_empty (jsp_operand_t);
void dumper_init (void);
void dumper_free (void);
bool dumper_try_replace_var_with_reg (scopes_tree, op_meta *);
void dumper_start_move_of_vars_to_regs ();
bool dumper_start_move_of_args_to_regs (uint32_t args_num);
bool dumper_try_replace_identifier_name_with_reg (scopes_tree, op_meta *);
void dumper_alloc_reg_for_unused_arg (void);
void dumper_new_statement (void);
void dumper_new_scope (void);
@ -347,6 +350,7 @@ void dump_prop_setter (jsp_operand_t, jsp_operand_t, jsp_operand_t);
void dump_function_end_for_rewrite (void);
void rewrite_function_end ();
void dumper_decrement_function_end_pos (void);
jsp_operand_t dump_this_res (void);
@ -474,14 +478,13 @@ void rewrite_finally (void);
void dump_end_try_catch_finally (void);
void dump_throw (jsp_operand_t);
bool dumper_variable_declaration_exists (lit_cpointer_t);
void dump_variable_declaration (lit_cpointer_t);
vm_instr_counter_t dump_scope_code_flags_for_rewrite (void);
void rewrite_scope_code_flags (vm_instr_counter_t, opcode_scope_code_flags_t);
void dump_reg_var_decl_for_rewrite (void);
void rewrite_reg_var_decl (void);
vm_instr_counter_t dump_reg_var_decl_for_rewrite (void);
void rewrite_reg_var_decl (vm_instr_counter_t);
void dump_ret (void);
void dump_retval (jsp_operand_t);

193
jerry-core/parser/js/parser.cpp
View File

@ -1852,18 +1852,19 @@ static jsp_operand_t
parse_variable_declaration (void)
{
current_token_must_be (TOK_NAME);
const jsp_operand_t name = literal_operand (token_data_as_lit_cp ());
if (!dumper_variable_declaration_exists (token_data_as_lit_cp ()))
const lit_cpointer_t lit_cp = token_data_as_lit_cp ();
const jsp_operand_t name = literal_operand (lit_cp);
if (!scopes_tree_variable_declaration_exists (STACK_TOP (scopes), lit_cp))
{
jsp_early_error_check_for_eval_and_arguments_in_strict_mode (literal_operand (token_data_as_lit_cp ()),
is_strict_mode (),
tok.loc);
jsp_early_error_check_for_eval_and_arguments_in_strict_mode (name, is_strict_mode (), tok.loc);
dump_variable_declaration (token_data_as_lit_cp ());
dump_variable_declaration (lit_cp);
}
skip_newlines ();
if (token_is (TOK_EQ))
{
skip_newlines ();
@ -3014,7 +3015,7 @@ parse_source_element_list (bool is_global, /**< flag, indicating that we parsing
check_directive_prologue_for_use_strict ();
dump_reg_var_decl_for_rewrite ();
vm_instr_counter_t reg_var_decl_oc = dump_reg_var_decl_for_rewrite ();
if (inside_eval
&& !inside_function)
@ -3054,8 +3055,6 @@ parse_source_element_list (bool is_global, /**< flag, indicating that we parsing
scope_flags = (opcode_scope_code_flags_t) (scope_flags | OPCODE_SCOPE_CODE_FLAGS_NOT_REF_EVAL_IDENTIFIER);
}
rewrite_scope_code_flags (scope_code_flags_oc, scope_flags);
#ifdef CONFIG_PARSER_ENABLE_PARSE_TIME_BYTE_CODE_OPTIMIZER
if (is_try_replace_local_vars_with_regs
&& fe_scope_tree->type == SCOPE_TYPE_FUNCTION)
@ -3083,30 +3082,167 @@ parse_source_element_list (bool is_global, /**< flag, indicating that we parsing
/* no subscopes, as no function declarations / eval etc. in the scope */
JERRY_ASSERT (fe_scope_tree->t.children_num == 0);
bool are_all_vars_replaced = true;
for (vm_instr_counter_t var_decl_pos = 0;
var_decl_pos < linked_list_get_length (fe_scope_tree->var_decls);
var_decl_pos++)
{
op_meta *om_p = (op_meta *) linked_list_element (fe_scope_tree->var_decls, var_decl_pos);
vm_instr_counter_t instr_pos = 0u;
if (!dumper_try_replace_var_with_reg (fe_scope_tree, om_p))
const vm_instr_counter_t header_oc = instr_pos++;
op_meta header_opm = scopes_tree_op_meta (fe_scope_tree, header_oc);
JERRY_ASSERT (header_opm.op.op_idx == VM_OP_FUNC_EXPR_N || header_opm.op.op_idx == VM_OP_FUNC_DECL_N);
vm_instr_counter_t function_end_pos = instr_pos;
while (true)
{
op_meta meta_opm = scopes_tree_op_meta (fe_scope_tree, function_end_pos);
JERRY_ASSERT (meta_opm.op.op_idx == VM_OP_META);
opcode_meta_type meta_type = (opcode_meta_type) meta_opm.op.data.meta.type;
if (meta_type == OPCODE_META_TYPE_FUNCTION_END)
{
are_all_vars_replaced = false;
/* marker of function argument list end reached */
break;
}
else
{
JERRY_ASSERT (meta_type == OPCODE_META_TYPE_VARG);
function_end_pos++;
}
}
if (are_all_vars_replaced)
{
/*
* All local variables were replaced with registers, so variable declarations could be removed.
*
* TODO:
* Support removal of a particular variable declaration, without removing the whole list.
*/
uint32_t args_num = (uint32_t) (function_end_pos - instr_pos);
linked_list_free (fe_scope_tree->var_decls);
fe_scope_tree->var_decls = linked_list_init (sizeof (op_meta));
dumper_start_move_of_vars_to_regs ();
/* remove declarations of variables with names equal to an argument's name */
vm_instr_counter_t var_decl_pos = 0;
while (var_decl_pos < linked_list_get_length (fe_scope_tree->var_decls))
{
op_meta *om_p = (op_meta *) linked_list_element (fe_scope_tree->var_decls, var_decl_pos);
bool is_removed = false;
for (vm_instr_counter_t arg_index = instr_pos;
arg_index < function_end_pos;
arg_index++)
{
op_meta meta_opm = scopes_tree_op_meta (fe_scope_tree, arg_index);
JERRY_ASSERT (meta_opm.op.op_idx == VM_OP_META);
JERRY_ASSERT (meta_opm.op.data.meta.data_1 == VM_IDX_REWRITE_LITERAL_UID);
JERRY_ASSERT (om_p->op.data.var_decl.variable_name == VM_IDX_REWRITE_LITERAL_UID);
if (meta_opm.lit_id[1].packed_value == om_p->lit_id[0].packed_value)
{
linked_list_remove_element (fe_scope_tree->var_decls, var_decl_pos);
is_removed = true;
break;
}
}
if (!is_removed)
{
if (!dumper_try_replace_identifier_name_with_reg (fe_scope_tree, om_p))
{
var_decl_pos++;
}
else
{
linked_list_remove_element (fe_scope_tree->var_decls, var_decl_pos);
}
}
}
if (dumper_start_move_of_args_to_regs (args_num))
{
scope_flags = (opcode_scope_code_flags_t) (scope_flags | OPCODE_SCOPE_CODE_FLAGS_ARGUMENTS_ON_REGISTERS);
JERRY_ASSERT (linked_list_get_length (fe_scope_tree->var_decls) == 0);
scope_flags = (opcode_scope_code_flags_t) (scope_flags | OPCODE_SCOPE_CODE_FLAGS_NO_LEX_ENV);
/* at this point all arguments can be moved to registers */
if (header_opm.op.op_idx == VM_OP_FUNC_EXPR_N)
{
header_opm.op.data.func_expr_n.arg_list = 0;
}
else
{
JERRY_ASSERT (header_opm.op.op_idx == VM_OP_FUNC_DECL_N);
header_opm.op.data.func_decl_n.arg_list = 0;
}
scopes_tree_set_op_meta (fe_scope_tree, header_oc, header_opm);
/*
* Mark duplicated arguments names as empty,
* leaving only last declaration for each duplicated
* argument name
*/
for (vm_instr_counter_t arg1_index = instr_pos;
arg1_index < function_end_pos;
arg1_index++)
{
op_meta meta_opm1 = scopes_tree_op_meta (fe_scope_tree, arg1_index);
JERRY_ASSERT (meta_opm1.op.op_idx == VM_OP_META);
for (vm_instr_counter_t arg2_index = (vm_instr_counter_t) (arg1_index + 1u);
arg2_index < function_end_pos;
arg2_index++)
{
op_meta meta_opm2 = scopes_tree_op_meta (fe_scope_tree, arg2_index);
JERRY_ASSERT (meta_opm2.op.op_idx == VM_OP_META);
if (meta_opm1.lit_id[1].packed_value == meta_opm2.lit_id[1].packed_value)
{
meta_opm1.op.data.meta.data_1 = VM_IDX_EMPTY;
meta_opm1.lit_id[1] = NOT_A_LITERAL;
scopes_tree_set_op_meta (fe_scope_tree, arg1_index, meta_opm1);
break;
}
}
}
while (true)
{
op_meta meta_opm = scopes_tree_op_meta (fe_scope_tree, instr_pos);
JERRY_ASSERT (meta_opm.op.op_idx == VM_OP_META);
opcode_meta_type meta_type = (opcode_meta_type) meta_opm.op.data.meta.type;
if (meta_type == OPCODE_META_TYPE_FUNCTION_END)
{
/* marker of function argument list end reached */
break;
}
else
{
JERRY_ASSERT (meta_type == OPCODE_META_TYPE_VARG);
if (meta_opm.op.data.meta.data_1 == VM_IDX_EMPTY)
{
JERRY_ASSERT (meta_opm.lit_id[1].packed_value == NOT_A_LITERAL.packed_value);
dumper_alloc_reg_for_unused_arg ();
}
else
{
/* the varg specifies argument name, and so should be a string literal */
JERRY_ASSERT (meta_opm.op.data.meta.data_1 == VM_IDX_REWRITE_LITERAL_UID);
JERRY_ASSERT (meta_opm.lit_id[1].packed_value != NOT_A_LITERAL.packed_value);
bool is_replaced = dumper_try_replace_identifier_name_with_reg (fe_scope_tree, &meta_opm);
JERRY_ASSERT (is_replaced);
}
scopes_tree_remove_op_meta (fe_scope_tree, instr_pos);
reg_var_decl_oc--;
scope_code_flags_oc--;
dumper_decrement_function_end_pos ();
}
}
}
}
}
@ -3114,7 +3250,8 @@ parse_source_element_list (bool is_global, /**< flag, indicating that we parsing
(void) is_try_replace_local_vars_with_regs;
#endif /* !CONFIG_PARSER_ENABLE_PARSE_TIME_BYTE_CODE_OPTIMIZER */
rewrite_reg_var_decl ();
rewrite_scope_code_flags (scope_code_flags_oc, scope_flags);
rewrite_reg_var_decl (reg_var_decl_oc);
dumper_finish_scope ();
} /* parse_source_element_list */

43
jerry-core/parser/js/scopes-tree.cpp
View File

@ -118,6 +118,20 @@ scopes_tree_var_decl (scopes_tree tree, /**< scope, from which variable declarat
return *(op_meta *) linked_list_element (tree->var_decls, oc);
} /* scopes_tree_var_decl */
/**
* Remove specified instruction from scopes tree node's instructions list
*/
void
scopes_tree_remove_op_meta (scopes_tree tree, /**< scopes tree node */
vm_instr_counter_t oc) /**< position of instruction to remove */
{
assert_tree (tree);
JERRY_ASSERT (oc < tree->instrs_count);
linked_list_remove_element (tree->instrs, oc);
tree->instrs_count--;
} /* scopes_tree_remove_op_meta */
vm_instr_counter_t
scopes_tree_count_instructions (scopes_tree t)
{
@ -132,6 +146,35 @@ scopes_tree_count_instructions (scopes_tree t)
return res;
}
/**
* Checks if variable declaration exists in the scope
*
* @return true / false
*/
bool
scopes_tree_variable_declaration_exists (scopes_tree tree, /**< scope */
lit_cpointer_t lit_id) /**< literal which holds variable's name */
{
assert_tree (tree);
for (vm_instr_counter_t oc = 0u;
oc < linked_list_get_length (tree->var_decls);
oc++)
{
const op_meta* var_decl_om_p = (op_meta *) linked_list_element (tree->var_decls, oc);
JERRY_ASSERT (var_decl_om_p->op.op_idx == VM_OP_VAR_DECL);
JERRY_ASSERT (var_decl_om_p->op.data.var_decl.variable_name == VM_IDX_REWRITE_LITERAL_UID);
if (var_decl_om_p->lit_id[0].packed_value == lit_id.packed_value)
{
return true;
}
}
return false;
} /* scopes_tree_variable_declaration_exists */
static uint16_t
lit_id_hash (void * lit_id)
{

2
jerry-core/parser/js/scopes-tree.h
View File

@ -90,8 +90,10 @@ void scopes_tree_set_op_meta (scopes_tree, vm_instr_counter_t, op_meta);
void scopes_tree_set_instrs_num (scopes_tree, vm_instr_counter_t);
op_meta scopes_tree_op_meta (scopes_tree, vm_instr_counter_t);
op_meta scopes_tree_var_decl (scopes_tree, vm_instr_counter_t);
void scopes_tree_remove_op_meta (scopes_tree tree, vm_instr_counter_t oc);
size_t scopes_tree_count_literals_in_blocks (scopes_tree);
vm_instr_counter_t scopes_tree_count_instructions (scopes_tree);
bool scopes_tree_variable_declaration_exists (scopes_tree, lit_cpointer_t);
vm_instr_t *scopes_tree_raw_data (scopes_tree, uint8_t *, size_t, lit_id_hash_table *);
void scopes_tree_set_strict_mode (scopes_tree, bool);
void scopes_tree_set_arguments_used (scopes_tree);

23
jerry-core/parser/js/serializer.cpp
View File

@ -34,18 +34,6 @@ serializer_get_op_meta (vm_instr_counter_t oc)
return scopes_tree_op_meta (current_scope, oc);
}
/**
* Get variable declaration of the current scope
*
* @return variable declaration instruction
*/
op_meta
serializer_get_var_decl (vm_instr_counter_t oc) /**< index of variable declaration */
{
JERRY_ASSERT (current_scope);
return scopes_tree_var_decl (current_scope, oc);
} /* serializer_get_var_decl */
/**
* Get byte-code instruction from current scope, or specified byte-code array
*
@ -231,17 +219,6 @@ serializer_get_current_instr_counter (void)
return scopes_tree_instrs_num (current_scope);
}
/**
* Get number of variable declarations in the current scope
*
* @return count of variable declarations
*/
vm_instr_counter_t
serializer_get_current_var_decls_counter (void)
{
return scopes_tree_var_decls_num (current_scope);
} /* serializer_get_current_var_decls_counter */
vm_instr_counter_t
serializer_count_instrs_in_subscopes (void)
{

2
jerry-core/parser/js/serializer.h
View File

@ -28,7 +28,6 @@
void serializer_init ();
void serializer_set_show_instrs (bool);
op_meta serializer_get_op_meta (vm_instr_counter_t);
op_meta serializer_get_var_decl (vm_instr_counter_t);
vm_instr_t serializer_get_instr (const bytecode_data_header_t *, vm_instr_counter_t);
lit_cpointer_t serializer_get_literal_cp_by_uid (uint8_t, const bytecode_data_header_t *, vm_instr_counter_t);
void serializer_set_scope (scopes_tree);
@ -37,7 +36,6 @@ const bytecode_data_header_t *serializer_merge_scopes_into_bytecode (void);
void serializer_dump_op_meta (op_meta);
void serializer_dump_var_decl (op_meta);
vm_instr_counter_t serializer_get_current_instr_counter (void);
vm_instr_counter_t serializer_get_current_var_decls_counter (void);
vm_instr_counter_t serializer_count_instrs_in_subscopes (void);
void serializer_set_writing_position (vm_instr_counter_t);
void serializer_rewrite_op_meta (vm_instr_counter_t, op_meta);

6
jerry-core/vm/opcodes.h
View File

@ -164,8 +164,12 @@ typedef enum : vm_idx_t
OPCODE_SCOPE_CODE_FLAGS_STRICT = (1u << 0), /**< code is strict mode code */
OPCODE_SCOPE_CODE_FLAGS_NOT_REF_ARGUMENTS_IDENTIFIER = (1u << 1), /**< code doesn't reference
* 'arguments' identifier */
OPCODE_SCOPE_CODE_FLAGS_NOT_REF_EVAL_IDENTIFIER = (1u << 2) /**< code doesn't reference
OPCODE_SCOPE_CODE_FLAGS_NOT_REF_EVAL_IDENTIFIER = (1u << 2), /**< code doesn't reference
* 'eval' identifier */
OPCODE_SCOPE_CODE_FLAGS_ARGUMENTS_ON_REGISTERS = (1u << 3), /**< function's arguments are moved to registers,
* so should be initialized in vm registers,
* and not in lexical environment */
OPCODE_SCOPE_CODE_FLAGS_NO_LEX_ENV = (1u << 4) /**< no lex. env. is necessary for the function */
} opcode_scope_code_flags_t;
/**

12
jerry-core/vm/pretty-printer.cpp
View File

@ -221,7 +221,7 @@ pp_op_meta (const bytecode_data_header_t *bytecode_data_p,
PP_OP (VM_OP_PRE_INCR, "%s = ++%s;");
PP_OP (VM_OP_PRE_DECR, "%s = --%s;");
PP_OP (VM_OP_THROW_VALUE, "throw %s;");
PP_OP (VM_OP_REG_VAR_DECL, "%d tmp regs, %d local variable regs");
PP_OP (VM_OP_REG_VAR_DECL, "%d tmp regs, %d local variable regs, %d argument variable regs");
PP_OP (VM_OP_VAR_DECL, "var %s;");
PP_OP (VM_OP_RETVAL, "return %s;");
PP_OP (VM_OP_RET, "ret;");
@ -572,6 +572,16 @@ pp_op_meta (const bytecode_data_header_t *bytecode_data_p,
printf ("[no 'eval'] ");
scope_flags &= (vm_idx_t) ~(OPCODE_SCOPE_CODE_FLAGS_NOT_REF_EVAL_IDENTIFIER);
}
if (scope_flags & OPCODE_SCOPE_CODE_FLAGS_ARGUMENTS_ON_REGISTERS)
{
printf ("[arguments are placed on registers] ");
scope_flags &= (vm_idx_t) ~(OPCODE_SCOPE_CODE_FLAGS_ARGUMENTS_ON_REGISTERS);
}
if (scope_flags & OPCODE_SCOPE_CODE_FLAGS_NO_LEX_ENV)
{
printf ("[no lexical environment should be created for the scope] ");
scope_flags &= (vm_idx_t) ~(OPCODE_SCOPE_CODE_FLAGS_NO_LEX_ENV);
}
JERRY_ASSERT (scope_flags == 0);
}

5
jerry-core/vm/vm-opcodes.inc.h
View File

@ -292,9 +292,10 @@ VM_OP_3 (is_false_jmp_down, IS_FALSE_JMP_DOWN,
VM_OP_1 (var_decl, VAR_DECL,
variable_name, VM_OP_ARG_TYPE_STRING)
VM_OP_2 (reg_var_decl, REG_VAR_DECL,
VM_OP_3 (reg_var_decl, REG_VAR_DECL,
tmp_regs_num, VM_OP_ARG_TYPE_INTEGER_CONST,
local_var_regs_num, VM_OP_ARG_TYPE_INTEGER_CONST)
local_var_regs_num, VM_OP_ARG_TYPE_INTEGER_CONST,
arg_regs_num, VM_OP_ARG_TYPE_INTEGER_CONST)
VM_OP_3 (meta, META,
type, VM_OP_ARG_TYPE_INTEGER_CONST,

24
jerry-core/vm/vm-stack.cpp
View File

@ -77,8 +77,13 @@ void
vm_stack_add_frame (vm_stack_frame_t *frame_p, /**< frame to initialize */
ecma_value_t *regs_p, /**< array of register variables' values */
uint32_t regs_num, /**< total number of register variables */
uint32_t local_vars_regs_num) /**< number of register variables,
uint32_t local_vars_regs_num, /**< number of register variables,
* used for local variables */
uint32_t arg_regs_num, /**< number of register variables,
* used for arguments */
ecma_collection_header_t *arguments_p) /**< collection of arguments
* (for case, their values
* are moved to registers) */
{
frame_p->prev_frame_p = vm_stack_top_frame_p;
vm_stack_top_frame_p = frame_p;
@ -91,17 +96,30 @@ vm_stack_add_frame (vm_stack_frame_t *frame_p, /**< frame to initialize */
JERRY_ASSERT (regs_num >= VM_SPECIAL_REGS_NUMBER);
for (uint32_t i = 0; i < regs_num - local_vars_regs_num; i++)
for (uint32_t i = 0; i < regs_num - local_vars_regs_num - arg_regs_num; i++)
{
regs_p[i] = ecma_make_simple_value (ECMA_SIMPLE_VALUE_EMPTY);
}
for (uint32_t i = regs_num - local_vars_regs_num;
for (uint32_t i = regs_num - local_vars_regs_num - arg_regs_num;
i < regs_num;
i++)
{
regs_p[i] = ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED);
}
if (arg_regs_num != 0)
{
ecma_collection_iterator_t args_iterator;
ecma_collection_iterator_init (&args_iterator, arguments_p);
for (uint32_t i = regs_num - arg_regs_num;
i < regs_num && ecma_collection_iterator_next (&args_iterator);
i++)
{
regs_p[i] = ecma_copy_value (*args_iterator.current_value_p, false);
}
}
} /* vm_stack_add_frame */
/**

2
jerry-core/vm/vm-stack.h
View File

@ -60,7 +60,7 @@ extern void vm_stack_finalize (void);
extern vm_stack_frame_t *
vm_stack_get_top_frame (void);
extern void
vm_stack_add_frame (vm_stack_frame_t *, ecma_value_t *, uint32_t, uint32_t);
vm_stack_add_frame (vm_stack_frame_t *, ecma_value_t *, uint32_t, uint32_t, uint32_t, ecma_collection_header_t *);
extern void vm_stack_free_frame (vm_stack_frame_t *);
extern ecma_value_t vm_stack_frame_get_reg_value (vm_stack_frame_t *, uint32_t);
extern void vm_stack_frame_set_reg_value (vm_stack_frame_t *, uint32_t, ecma_value_t);

35
jerry-core/vm/vm.cpp
View File

@ -411,7 +411,8 @@ vm_run_global (void)
ecma_make_object_value (glob_obj_p),
lex_env_p,
is_strict,
false);
false,
NULL);
jerry_completion_code_t ret_code;
@ -479,7 +480,8 @@ vm_run_eval (const bytecode_data_header_t *bytecode_data_p, /**< byte-code data
this_binding,
lex_env_p,
is_strict,
true);
true,
NULL);
if (ecma_is_completion_value_return (completion))
{
@ -595,7 +597,13 @@ vm_run_from_pos (const bytecode_data_header_t *header_p, /**< byte-code data hea
ecma_value_t this_binding_value, /**< value of 'ThisBinding' */
ecma_object_t *lex_env_p, /**< lexical environment to use */
bool is_strict, /**< is the code is strict mode code (ECMA-262 v5, 10.1.1) */
bool is_eval_code) /**< is the code is eval code (ECMA-262 v5, 10.1) */
bool is_eval_code, /**< is the code is eval code (ECMA-262 v5, 10.1) */
ecma_collection_header_t *arg_collection_p) /**<
* - collection of function call arguments,
* if arguments for the called function
* are placed on registers;
* - NULL - otherwise.
*/
{
ecma_completion_value_t completion;
@ -605,8 +613,9 @@ vm_run_from_pos (const bytecode_data_header_t *header_p, /**< byte-code data hea
const uint32_t tmp_regs_num = curr->data.reg_var_decl.tmp_regs_num;
const uint32_t local_var_regs_num = curr->data.reg_var_decl.local_var_regs_num;
const uint32_t arg_regs_num = curr->data.reg_var_decl.arg_regs_num;
uint32_t regs_num = VM_SPECIAL_REGS_NUMBER + tmp_regs_num + local_var_regs_num;
uint32_t regs_num = VM_SPECIAL_REGS_NUMBER + tmp_regs_num + local_var_regs_num + arg_regs_num;
MEM_DEFINE_LOCAL_ARRAY (regs, regs_num, ecma_value_t);
@ -619,7 +628,7 @@ vm_run_from_pos (const bytecode_data_header_t *header_p, /**< byte-code data hea
frame_ctx.is_call_in_direct_eval_form = false;
frame_ctx.tmp_num_p = ecma_alloc_number ();
vm_stack_add_frame (&frame_ctx.stack_frame, regs, regs_num, local_var_regs_num);
vm_stack_add_frame (&frame_ctx.stack_frame, regs, regs_num, local_var_regs_num, arg_regs_num, arg_collection_p);
vm_stack_frame_set_reg_value (&frame_ctx.stack_frame,
VM_REG_SPECIAL_THIS_BINDING,
ecma_copy_value (this_binding_value, false));
@ -676,6 +685,22 @@ vm_get_scope_flags (const bytecode_data_header_t *bytecode_header_p, /**< byte-c
return (opcode_scope_code_flags_t) flags_instr.data.meta.data_1;
} /* vm_get_scope_flags */
/**
* Get arguments number, encoded in specified reg_var_decl instruction
*
* @return value of "arguments number" reg_var_decl's parameter
*/
uint8_t
vm_get_scope_args_num (const bytecode_data_header_t *bytecode_header_p, /**< byte-code data */
vm_instr_counter_t reg_var_decl_oc) /**< position of reg_var_decl instruction */
{
const vm_instr_t *instrs_p = bytecode_header_p->instrs_p;
const vm_instr_t *reg_var_decl_instr_p = &instrs_p[reg_var_decl_oc];
JERRY_ASSERT (reg_var_decl_instr_p->op_idx == VM_OP_REG_VAR_DECL);
return reg_var_decl_instr_p->data.reg_var_decl.arg_regs_num;
} /* vm_get_scope_args_num */
/**
* Check whether currently executed code is strict mode code
*

3
jerry-core/vm/vm.h
View File

@ -27,10 +27,11 @@ extern ecma_completion_value_t vm_run_eval (const bytecode_data_header_t *, bool
extern ecma_completion_value_t vm_loop (vm_frame_ctx_t *, vm_run_scope_t *);
extern ecma_completion_value_t vm_run_from_pos (const bytecode_data_header_t *, vm_instr_counter_t,
ecma_value_t, ecma_object_t *, bool, bool);
ecma_value_t, ecma_object_t *, bool, bool, ecma_collection_header_t *);
extern vm_instr_t vm_get_instr (const vm_instr_t *, vm_instr_counter_t);
extern opcode_scope_code_flags_t vm_get_scope_flags (const bytecode_data_header_t *, vm_instr_counter_t);
extern uint8_t vm_get_scope_args_num (const bytecode_data_header_t *, vm_instr_counter_t);
extern bool vm_is_strict_mode (void);
extern bool vm_is_direct_eval_form_call (void);

2
tests/unit/test-parser.cpp
View File

@ -121,7 +121,7 @@ main (int __attr_unused___ argc,
OPCODE_SCOPE_CODE_FLAGS_NOT_REF_ARGUMENTS_IDENTIFIER
| OPCODE_SCOPE_CODE_FLAGS_NOT_REF_EVAL_IDENTIFIER,
VM_IDX_EMPTY),
getop_reg_var_decl (1u, 0u),
getop_reg_var_decl (1u, 0u, 0u),
getop_var_decl (0), // var a;
getop_assignment (VM_REG_GENERAL_FIRST, 1, 1), // $tmp0 = 1;
getop_assignment (0, 6, VM_REG_GENERAL_FIRST), // a = $tmp0;