gh-128262: Allow specialization of calls to classes with __slots__ (GH-128263)

1 files changed, 4 insertions, 2 deletions

diff --git a/Python/bytecodes.c b/Python/bytecodes.c
index 63cf197..602cf7f 100644
--- a/Python/bytecodes.c
+++ b/Python/bytecodes.c
@@ -3765,13 +3765,15 @@ dummy_func(
             DEOPT_IF(!PyType_Check(callable_o));
             PyTypeObject *tp = (PyTypeObject *)callable_o;
             DEOPT_IF(FT_ATOMIC_LOAD_UINT32_RELAXED(tp->tp_version_tag) != type_version);
-            assert(tp->tp_flags & Py_TPFLAGS_INLINE_VALUES);
+            assert(tp->tp_new == PyBaseObject_Type.tp_new);
+            assert(tp->tp_flags & Py_TPFLAGS_HEAPTYPE);
+            assert(tp->tp_alloc == PyType_GenericAlloc);
             PyHeapTypeObject *cls = (PyHeapTypeObject *)callable_o;
             PyFunctionObject *init_func = (PyFunctionObject *)FT_ATOMIC_LOAD_PTR_ACQUIRE(cls->_spec_cache.init);
             PyCodeObject *code = (PyCodeObject *)init_func->func_code;
             DEOPT_IF(!_PyThreadState_HasStackSpace(tstate, code->co_framesize + _Py_InitCleanup.co_framesize));
             STAT_INC(CALL, hit);
-            PyObject *self_o = _PyType_NewManagedObject(tp);
+            PyObject *self_o = PyType_GenericAlloc(tp, 0);
             if (self_o == NULL) {
                 ERROR_NO_POP();
             }