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GH-111848: Tidy up tier 2 handling of FOR_ITER specialization by using DEOPT_IF instead of jumps. (GH-111849)

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Mark Shannon 2023-11-08 13:31:55 +00:00 • committed by GitHub
parent 11e83488c5
commit 06efb60264
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8 changed files with 59 additions and 136 deletions
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43
Python/executor_cases.c.h generated
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@ -2138,26 +2138,14 @@
break;
}
case _IS_ITER_EXHAUSTED_LIST: {
case _GUARD_NOT_EXHAUSTED_LIST: {
PyObject *iter;
PyObject *exhausted;
iter = stack_pointer[-1];
_PyListIterObject *it = (_PyListIterObject *)iter;
assert(Py_TYPE(iter) == &PyListIter_Type);
PyListObject *seq = it->it_seq;
if (seq == NULL) {
exhausted = Py_True;
}
else if (it->it_index >= PyList_GET_SIZE(seq)) {
Py_DECREF(seq);
it->it_seq = NULL;
exhausted = Py_True;
}
else {
exhausted = Py_False;
}
STACK_GROW(1);
stack_pointer[-1] = exhausted;
DEOPT_IF(seq == NULL, _GUARD_NOT_EXHAUSTED_LIST);
DEOPT_IF(it->it_index >= PyList_GET_SIZE(seq), _GUARD_NOT_EXHAUSTED_LIST);
break;
}
@ -2183,26 +2171,14 @@
break;
}
case _IS_ITER_EXHAUSTED_TUPLE: {
case _GUARD_NOT_EXHAUSTED_TUPLE: {
PyObject *iter;
PyObject *exhausted;
iter = stack_pointer[-1];
_PyTupleIterObject *it = (_PyTupleIterObject *)iter;
assert(Py_TYPE(iter) == &PyTupleIter_Type);
PyTupleObject *seq = it->it_seq;
if (seq == NULL) {
exhausted = Py_True;
}
else if (it->it_index >= PyTuple_GET_SIZE(seq)) {
Py_DECREF(seq);
it->it_seq = NULL;
exhausted = Py_True;
}
else {
exhausted = Py_False;
}
STACK_GROW(1);
stack_pointer[-1] = exhausted;
DEOPT_IF(seq == NULL, _GUARD_NOT_EXHAUSTED_TUPLE);
DEOPT_IF(it->it_index >= PyTuple_GET_SIZE(seq), _GUARD_NOT_EXHAUSTED_TUPLE);
break;
}
@ -2229,15 +2205,12 @@
break;
}
case _IS_ITER_EXHAUSTED_RANGE: {
case _GUARD_NOT_EXHAUSTED_RANGE: {
PyObject *iter;
PyObject *exhausted;
iter = stack_pointer[-1];
_PyRangeIterObject *r = (_PyRangeIterObject *)iter;
assert(Py_TYPE(r) == &PyRangeIter_Type);
exhausted = r->len <= 0 ? Py_True : Py_False;
STACK_GROW(1);
stack_pointer[-1] = exhausted;
DEOPT_IF(r->len <= 0, _GUARD_NOT_EXHAUSTED_RANGE);
break;
}