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GH-131798: Narrow the return type of _GET_LEN to int (GH-133345)

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Nadeshiko Manju 2025-05-21 06:02:50 +08:00 • committed by GitHub
parent e4fbfb1288
commit e1c0c451a2
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4 changed files with 87 additions and 1 deletions
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19
Python/optimizer_bytecodes.c
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@ -1116,6 +1116,25 @@ dummy_func(void) {
res = sym_new_type(ctx, &PyLong_Type);
}
op(_GET_LEN, (obj -- obj, len)) {
int tuple_length = sym_tuple_length(obj);
if (tuple_length == -1) {
len = sym_new_type(ctx, &PyLong_Type);
}
else {
assert(tuple_length >= 0);
PyObject *temp = PyLong_FromLong(tuple_length);
if (temp == NULL) {
goto error;
}
if (_Py_IsImmortal(temp)) {
REPLACE_OP(this_instr, _LOAD_CONST_INLINE_BORROW, 0, (uintptr_t)temp);
}
len = sym_new_const(ctx, temp);
Py_DECREF(temp);
}
}
op(_GUARD_CALLABLE_LEN, (callable, unused, unused -- callable, unused, unused)) {
PyObject *len = _PyInterpreterState_GET()->callable_cache.len;
if (sym_get_const(ctx, callable) == len) {

23
Python/optimizer_cases.c.h generated
View file

@ -1463,8 +1463,29 @@
}
case _GET_LEN: {
JitOptSymbol *obj;
JitOptSymbol *len;
len = sym_new_not_null(ctx);
obj = stack_pointer[-1];
int tuple_length = sym_tuple_length(obj);
if (tuple_length == -1) {
len = sym_new_type(ctx, &PyLong_Type);
}
else {
assert(tuple_length >= 0);
PyObject *temp = PyLong_FromLong(tuple_length);
if (temp == NULL) {
goto error;
}
if (_Py_IsImmortal(temp)) {
REPLACE_OP(this_instr, _LOAD_CONST_INLINE_BORROW, 0, (uintptr_t)temp);
}
len = sym_new_const(ctx, temp);
stack_pointer[0] = len;
stack_pointer += 1;
assert(WITHIN_STACK_BOUNDS());
Py_DECREF(temp);
stack_pointer += -1;
}
stack_pointer[0] = len;
stack_pointer += 1;
assert(WITHIN_STACK_BOUNDS());