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gh-148871: Add CONSTANT_EMPTY_TUPLE to LOAD_COMMON_CONSTANT (GH-149688)

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Pieter Eendebak 2026-05-21 16:54:46 +02:00 • committed by GitHub
parent c35b0f2b62
commit f2fa291db8
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8 changed files with 20 additions and 9 deletions
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4
Python/flowgraph.c
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@ -1468,6 +1468,10 @@ maybe_instr_make_load_common_const(cfg_instr *instr, PyObject *newconst)
&& PyUnicode_GET_LENGTH(newconst) == 0) {
oparg = CONSTANT_EMPTY_STR;
}
else if (PyTuple_CheckExact(newconst)
&& PyTuple_GET_SIZE(newconst) == 0) {
oparg = CONSTANT_EMPTY_TUPLE;
}
else if (PyLong_CheckExact(newconst)) {
int overflow;
long val = PyLong_AsLongAndOverflow(newconst, &overflow);

2
Python/pylifecycle.c
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@ -893,6 +893,8 @@ pycore_init_builtins(PyThreadState *tstate)
interp->common_consts[CONSTANT_MINUS_ONE] =
(PyObject *)&_PyLong_SMALL_INTS[_PY_NSMALLNEGINTS - 1];
interp->common_consts[CONSTANT_BUILTIN_FROZENSET] = (PyObject *)&PyFrozenSet_Type;
interp->common_consts[CONSTANT_EMPTY_TUPLE] =
Py_GetConstantBorrowed(Py_CONSTANT_EMPTY_TUPLE);
for (int i = 0; i < NUM_COMMON_CONSTANTS; i++) {
assert(interp->common_consts[i] != NULL);
}