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gh-134584: Eliminate redundant refcounting from _STORE_SUBSCR_LIST_INT (gh-142703)

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Donghee Na 2025-12-14 21:26:00 +09:00 • committed by GitHub
parent af7cca3c39
commit 04da416e6b
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GPG key ID: B5690EEEBB952194
9 changed files with 96 additions and 21 deletions
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10
Python/bytecodes.c
View file

@ -1126,9 +1126,9 @@ dummy_func(
macro(STORE_SUBSCR) = _SPECIALIZE_STORE_SUBSCR + _STORE_SUBSCR;
macro(STORE_SUBSCR_LIST_INT) =
_GUARD_TOS_INT + _GUARD_NOS_LIST + unused/1 + _STORE_SUBSCR_LIST_INT;
_GUARD_TOS_INT + _GUARD_NOS_LIST + unused/1 + _STORE_SUBSCR_LIST_INT + _POP_TOP_INT + POP_TOP;
op(_STORE_SUBSCR_LIST_INT, (value, list_st, sub_st -- )) {
op(_STORE_SUBSCR_LIST_INT, (value, list_st, sub_st -- ls, ss)) {
PyObject *sub = PyStackRef_AsPyObjectBorrow(sub_st);
PyObject *list = PyStackRef_AsPyObjectBorrow(list_st);
@ -1151,9 +1151,9 @@ dummy_func(
PyStackRef_AsPyObjectSteal(value));
assert(old_value != NULL);
UNLOCK_OBJECT(list); // unlock before decrefs!
PyStackRef_CLOSE_SPECIALIZED(sub_st, _PyLong_ExactDealloc);
DEAD(sub_st);
PyStackRef_CLOSE(list_st);
INPUTS_DEAD();
ls = list_st;
ss = sub_st;
Py_DECREF(old_value);
}

20
Python/executor_cases.c.h generated
View file

@ -5703,12 +5703,14 @@
break;
}
case _STORE_SUBSCR_LIST_INT_r30: {
case _STORE_SUBSCR_LIST_INT_r32: {
CHECK_CURRENT_CACHED_VALUES(3);
assert(WITHIN_STACK_BOUNDS_WITH_CACHE());
_PyStackRef sub_st;
_PyStackRef list_st;
_PyStackRef value;
_PyStackRef ls;
_PyStackRef ss;
_PyStackRef _stack_item_0 = _tos_cache0;
_PyStackRef _stack_item_1 = _tos_cache1;
_PyStackRef _stack_item_2 = _tos_cache2;
@ -5744,15 +5746,21 @@
PyStackRef_AsPyObjectSteal(value));
assert(old_value != NULL);
UNLOCK_OBJECT(list);
PyStackRef_CLOSE_SPECIALIZED(sub_st, _PyLong_ExactDealloc);
ls = list_st;
ss = sub_st;
stack_pointer[0] = ls;
stack_pointer[1] = ss;
stack_pointer += 2;
ASSERT_WITHIN_STACK_BOUNDS(__FILE__, __LINE__);
_PyFrame_SetStackPointer(frame, stack_pointer);
PyStackRef_CLOSE(list_st);
Py_DECREF(old_value);
stack_pointer = _PyFrame_GetStackPointer(frame);
_tos_cache0 = PyStackRef_ZERO_BITS;
_tos_cache1 = PyStackRef_ZERO_BITS;
_tos_cache1 = ss;
_tos_cache0 = ls;
_tos_cache2 = PyStackRef_ZERO_BITS;
SET_CURRENT_CACHED_VALUES(0);
SET_CURRENT_CACHED_VALUES(2);
stack_pointer += -2;
ASSERT_WITHIN_STACK_BOUNDS(__FILE__, __LINE__);
assert(WITHIN_STACK_BOUNDS_WITH_CACHE());
break;
}

25
Python/generated_cases.c.h generated
View file

@ -11024,6 +11024,8 @@
_PyStackRef nos;
_PyStackRef list_st;
_PyStackRef sub_st;
_PyStackRef ls;
_PyStackRef ss;
// _GUARD_TOS_INT
{
value = stack_pointer[-1];
@ -11079,14 +11081,31 @@
PyStackRef_AsPyObjectSteal(value));
assert(old_value != NULL);
UNLOCK_OBJECT(list);
PyStackRef_CLOSE_SPECIALIZED(sub_st, _PyLong_ExactDealloc);
stack_pointer += -3;
ls = list_st;
ss = sub_st;
stack_pointer[-3] = ls;
stack_pointer[-2] = ss;
stack_pointer += -1;
ASSERT_WITHIN_STACK_BOUNDS(__FILE__, __LINE__);
_PyFrame_SetStackPointer(frame, stack_pointer);
PyStackRef_CLOSE(list_st);
Py_DECREF(old_value);
stack_pointer = _PyFrame_GetStackPointer(frame);
}
// _POP_TOP_INT
{
value = ss;
assert(PyLong_CheckExact(PyStackRef_AsPyObjectBorrow(value)));
PyStackRef_CLOSE_SPECIALIZED(value, _PyLong_ExactDealloc);
}
// _POP_TOP
{
value = ls;
stack_pointer += -2;
ASSERT_WITHIN_STACK_BOUNDS(__FILE__, __LINE__);
_PyFrame_SetStackPointer(frame, stack_pointer);
PyStackRef_XCLOSE(value);
stack_pointer = _PyFrame_GetStackPointer(frame);
}
DISPATCH();
}

12
Python/optimizer_bytecodes.c
View file

@ -103,6 +103,12 @@ dummy_func(void) {
GETLOCAL(oparg) = value;
}
op(_STORE_SUBSCR_LIST_INT, (value, list_st, sub_st -- ls, ss)) {
(void)value;
ls = list_st;
ss = sub_st;
}
op(_PUSH_NULL, (-- res)) {
res = sym_new_null(ctx);
}
@ -529,6 +535,12 @@ dummy_func(void) {
}
}
op(_POP_TOP_INT, (value --)) {
if (PyJitRef_IsBorrowed(value)) {
REPLACE_OP(this_instr, _POP_TOP_NOP, 0, 0);
}
}
op(_COPY, (bottom, unused[oparg-1] -- bottom, unused[oparg-1], top)) {
assert(oparg > 0);
top = bottom;

22
Python/optimizer_cases.c.h generated
View file

@ -141,6 +141,11 @@
}
case _POP_TOP_INT: {
JitOptRef value;
value = stack_pointer[-1];
if (PyJitRef_IsBorrowed(value)) {
REPLACE_OP(this_instr, _POP_TOP_NOP, 0, 0);
}
CHECK_STACK_BOUNDS(-1);
stack_pointer += -1;
ASSERT_WITHIN_STACK_BOUNDS(__FILE__, __LINE__);
@ -1123,8 +1128,21 @@
}
case _STORE_SUBSCR_LIST_INT: {
CHECK_STACK_BOUNDS(-3);
stack_pointer += -3;
JitOptRef sub_st;
JitOptRef list_st;
JitOptRef value;
JitOptRef ls;
JitOptRef ss;
sub_st = stack_pointer[-1];
list_st = stack_pointer[-2];
value = stack_pointer[-3];
(void)value;
ls = list_st;
ss = sub_st;
CHECK_STACK_BOUNDS(-1);
stack_pointer[-3] = ls;
stack_pointer[-2] = ss;
stack_pointer += -1;
ASSERT_WITHIN_STACK_BOUNDS(__FILE__, __LINE__);
break;
}