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gh-98831: rewrite pattern matching opcodes in the instruction definition DSL (#101287)

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Irit Katriel 2023-01-24 22:39:13 +00:00 • committed by GitHub
parent f02fa64bf2
commit 1a9d8c750b
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5 changed files with 64 additions and 73 deletions
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50
Python/bytecodes.c
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@ -2092,61 +2092,37 @@ dummy_func(
PUSH(len_o);
}
// stack effect: (__0, __1 -- )
inst(MATCH_CLASS) {
inst(MATCH_CLASS, (subject, type, names -- attrs)) {
// Pop TOS and TOS1. Set TOS to a tuple of attributes on success, or
// None on failure.
PyObject *names = POP();
PyObject *type = POP();
PyObject *subject = TOP();
assert(PyTuple_CheckExact(names));
PyObject *attrs = match_class(tstate, subject, type, oparg, names);
Py_DECREF(names);
Py_DECREF(type);
attrs = match_class(tstate, subject, type, oparg, names);
DECREF_INPUTS();
if (attrs) {
// Success!
assert(PyTuple_CheckExact(attrs));
SET_TOP(attrs);
}
else if (_PyErr_Occurred(tstate)) {
// Error!
goto error;
assert(PyTuple_CheckExact(attrs)); // Success!
}
else {
// Failure!
SET_TOP(Py_NewRef(Py_None));
ERROR_IF(_PyErr_Occurred(tstate), error); // Error!
attrs = Py_NewRef(Py_None); // Failure!
}
Py_DECREF(subject);
}
// stack effect: ( -- __0)
inst(MATCH_MAPPING) {
PyObject *subject = TOP();
inst(MATCH_MAPPING, (subject -- subject, res)) {
int match = Py_TYPE(subject)->tp_flags & Py_TPFLAGS_MAPPING;
PyObject *res = match ? Py_True : Py_False;
PUSH(Py_NewRef(res));
res = Py_NewRef(match ? Py_True : Py_False);
PREDICT(POP_JUMP_IF_FALSE);
}
// stack effect: ( -- __0)
inst(MATCH_SEQUENCE) {
PyObject *subject = TOP();
inst(MATCH_SEQUENCE, (subject -- subject, res)) {
int match = Py_TYPE(subject)->tp_flags & Py_TPFLAGS_SEQUENCE;
PyObject *res = match ? Py_True : Py_False;
PUSH(Py_NewRef(res));
res = Py_NewRef(match ? Py_True : Py_False);
PREDICT(POP_JUMP_IF_FALSE);
}
// stack effect: ( -- __0)
inst(MATCH_KEYS) {
inst(MATCH_KEYS, (subject, keys -- subject, keys, values_or_none)) {
// On successful match, PUSH(values). Otherwise, PUSH(None).
PyObject *keys = TOP();
PyObject *subject = SECOND();
PyObject *values_or_none = match_keys(tstate, subject, keys);
if (values_or_none == NULL) {
goto error;
}
PUSH(values_or_none);
values_or_none = match_keys(tstate, subject, keys);
ERROR_IF(values_or_none == NULL, error);
}
// stack effect: ( -- )