Enable GC for new-style instances. This touches lots of files, since

many types were subclassable but had a xxx_dealloc function that
called PyObject_DEL(self) directly instead of deferring to
self->ob_type->tp_free(self).  It is permissible to set tp_free in the
type object directly to _PyObject_Del, for non-GC types, or to
_PyObject_GC_Del, for GC types.  Still, PyObject_DEL was a tad faster,
so I'm fearing that our pystone rating is going down again.  I'm not
sure if doing something like

void xxx_dealloc(PyObject *self)
{
	if (PyXxxCheckExact(self))
		PyObject_DEL(self);
	else
		self->ob_type->tp_free(self);
}

is any faster than always calling the else branch, so I haven't
attempted that -- however those types whose own dealloc is fancier
(int, float, unicode) do use this pattern.

1 files changed, 4 insertions, 2 deletions

diff --git a/Objects/funcobject.c b/Objects/funcobject.c
index 4e77d52..89dd7f9 100644
--- a/Objects/funcobject.c
+++ b/Objects/funcobject.c
@@ -461,7 +461,7 @@ static void
 cm_dealloc(classmethod *cm)
 {
 	Py_XDECREF(cm->cm_callable);
-	PyObject_DEL(cm);
+	cm->ob_type->tp_free((PyObject *)cm);
 }
 
 static PyObject *
@@ -531,6 +531,7 @@ PyTypeObject PyClassMethod_Type = {
 	cm_init,				/* tp_init */
 	PyType_GenericAlloc,			/* tp_alloc */
 	PyType_GenericNew,			/* tp_new */
+	_PyObject_Del,				/* tp_free */
 };
 
 PyObject *
@@ -571,7 +572,7 @@ static void
 sm_dealloc(staticmethod *sm)
 {
 	Py_XDECREF(sm->sm_callable);
-	PyObject_DEL(sm);
+	sm->ob_type->tp_free((PyObject *)sm);
 }
 
 static PyObject *
@@ -641,6 +642,7 @@ PyTypeObject PyStaticMethod_Type = {
 	sm_init,				/* tp_init */
 	PyType_GenericAlloc,			/* tp_alloc */
 	PyType_GenericNew,			/* tp_new */
+	_PyObject_Del,				/* tp_free */
 };
 
 PyObject *