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

1 files changed, 6 insertions, 2 deletions

diff --git a/Python/generated_cases.c.h b/Python/generated_cases.c.h
index bed16b60b76..98743c27c38 100644
--- a/Python/generated_cases.c.h
+++ b/Python/generated_cases.c.h
@@ -1048,13 +1048,17 @@
                 DEOPT_IF(!PyType_Check(callable_o), CALL);
                 PyTypeObject *tp = (PyTypeObject *)callable_o;
                 DEOPT_IF(FT_ATOMIC_LOAD_UINT32_RELAXED(tp->tp_version_tag) != type_version, CALL);
-                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), CALL);
                 STAT_INC(CALL, hit);
-                PyObject *self_o = _PyType_NewManagedObject(tp);
+                _PyFrame_SetStackPointer(frame, stack_pointer);
+                PyObject *self_o = PyType_GenericAlloc(tp, 0);
+                stack_pointer = _PyFrame_GetStackPointer(frame);
                 if (self_o == NULL) {
                     goto error;
                 }