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gh-134584: Eliminate redundant refcounting in JIT for MATCH_CLASS (GH-144821)

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Sacul 2026-03-14 20:00:18 +08:00 • committed by GitHub
parent 97968564b6
commit 798070d8ca
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11 changed files with 1155 additions and 1070 deletions
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13
Python/bytecodes.c
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@ -3254,7 +3254,7 @@ dummy_func(
len = PyStackRef_FromPyObjectSteal(len_o);
}
inst(MATCH_CLASS, (subject, type, names -- attrs)) {
op(_MATCH_CLASS, (subject, type, names -- attrs, s, tp, n)) {
// Pop TOS and TOS1. Set TOS to a tuple of attributes on success, or
// None on failure.
assert(PyTuple_CheckExact(PyStackRef_AsPyObjectBorrow(names)));
@ -3262,17 +3262,24 @@ dummy_func(
PyStackRef_AsPyObjectBorrow(subject),
PyStackRef_AsPyObjectBorrow(type), oparg,
PyStackRef_AsPyObjectBorrow(names));
DECREF_INPUTS();
if (attrs_o) {
assert(PyTuple_CheckExact(attrs_o)); // Success!
attrs = PyStackRef_FromPyObjectSteal(attrs_o);
}
else {
ERROR_IF(_PyErr_Occurred(tstate)); // Error!
if (_PyErr_Occurred(tstate)) { // Error!
ERROR_NO_POP();
}
attrs = PyStackRef_None; // Failure!
}
s = subject;
tp = type;
n = names;
INPUTS_DEAD();
}
macro(MATCH_CLASS) = _MATCH_CLASS + POP_TOP + POP_TOP + POP_TOP;
inst(MATCH_MAPPING, (subject -- subject, res)) {
int match = PyStackRef_TYPE(subject)->tp_flags & Py_TPFLAGS_MAPPING;
res = match ? PyStackRef_True : PyStackRef_False;