GH-122616: Simplify LOAD_ATTR_WITH_HINT and STORE_ATTR_WITH_HINT (GH-122620)

Author: markshannon

Python/bytecodes.c

@@ -2053,16 +2053,10 @@ dummy_func(
             PyDictObject *dict = _PyObject_GetManagedDict(owner_o);
             DEOPT_IF(hint >= (size_t)dict->ma_keys->dk_nentries);
             PyObject *name = GETITEM(FRAME_CO_NAMES, oparg>>1);
-            if (DK_IS_UNICODE(dict->ma_keys)) {
-                PyDictUnicodeEntry *ep = DK_UNICODE_ENTRIES(dict->ma_keys) + hint;
-                DEOPT_IF(ep->me_key != name);
-                attr_o = ep->me_value;
-            }
-            else {
-                PyDictKeyEntry *ep = DK_ENTRIES(dict->ma_keys) + hint;
-                DEOPT_IF(ep->me_key != name);
-                attr_o = ep->me_value;
-            }
+            DEOPT_IF(!DK_IS_UNICODE(dict->ma_keys));
+            PyDictUnicodeEntry *ep = DK_UNICODE_ENTRIES(dict->ma_keys) + hint;
+            DEOPT_IF(ep->me_key != name);
+            attr_o = ep->me_value;
             DEOPT_IF(attr_o == NULL);
             STAT_INC(LOAD_ATTR, hit);
             Py_INCREF(attr_o);
@@ -2214,23 +2208,14 @@ dummy_func(
             DEOPT_IF(hint >= (size_t)dict->ma_keys->dk_nentries);
             PyObject *old_value;
             uint64_t new_version;
-            if (DK_IS_UNICODE(dict->ma_keys)) {
-                PyDictUnicodeEntry *ep = DK_UNICODE_ENTRIES(dict->ma_keys) + hint;
-                DEOPT_IF(ep->me_key != name);
-                old_value = ep->me_value;
-                DEOPT_IF(old_value == NULL);
-                new_version = _PyDict_NotifyEvent(tstate->interp, PyDict_EVENT_MODIFIED, dict, name, PyStackRef_AsPyObjectBorrow(value));
-                ep->me_value = PyStackRef_AsPyObjectSteal(value);
-            }
-            else {
-                PyDictKeyEntry *ep = DK_ENTRIES(dict->ma_keys) + hint;
-                DEOPT_IF(ep->me_key != name);
-                old_value = ep->me_value;
-                DEOPT_IF(old_value == NULL);
-                new_version = _PyDict_NotifyEvent(tstate->interp, PyDict_EVENT_MODIFIED, dict, name, PyStackRef_AsPyObjectBorrow(value));
-                ep->me_value = PyStackRef_AsPyObjectSteal(value);
-            }
-            Py_DECREF(old_value);
+            DEOPT_IF(!DK_IS_UNICODE(dict->ma_keys));
+            PyDictUnicodeEntry *ep = DK_UNICODE_ENTRIES(dict->ma_keys) + hint;
+            DEOPT_IF(ep->me_key != name);
+            old_value = ep->me_value;
+            PyDict_WatchEvent event = old_value == NULL ? PyDict_EVENT_ADDED : PyDict_EVENT_MODIFIED;
+            new_version = _PyDict_NotifyEvent(tstate->interp, event, dict, name, PyStackRef_AsPyObjectBorrow(value));
+            ep->me_value = PyStackRef_AsPyObjectSteal(value);
+            Py_XDECREF(old_value);
             STAT_INC(STORE_ATTR, hit);
             /* Ensure dict is GC tracked if it needs to be */
             if (!_PyObject_GC_IS_TRACKED(dict) && _PyObject_GC_MAY_BE_TRACKED(PyStackRef_AsPyObjectBorrow(value))) {