Move dict version checking code into a separate utility code section since it's getting lengthy.

Cython/Compiler/Nodes.py

@@ -4355,6 +4355,8 @@ class OverrideCheckNode(StatNode):
                 self_arg, self_arg))
 
         code.putln("#if CYTHON_USE_DICT_VERSIONS && CYTHON_USE_PYTYPE_LOOKUP")
+        code.globalstate.use_utility_code(
+            UtilityCode.load_cached("PyDictVersioning", "ObjectHandling.c"))
         # TODO: remove the object dict version check by 'inlining' the getattr implementation for methods.
         # This would allow checking the dict versions around _PyType_Lookup() if it returns a descriptor,
         # and would (tada!) make this check a pure type based thing instead of supporting only a single

Cython/Utility/Exceptions.c

@@ -642,6 +642,7 @@ static int __Pyx_CLineForTraceback(PyThreadState *tstate, int c_line);/*proto*/
 
 /////////////// CLineInTraceback ///////////////
 //@requires: ObjectHandling.c::PyObjectGetAttrStr
+//@requires: ObjectHandling.c::PyDictVersioning
 //@requires: PyErrFetchRestore
 //@substitute: naming
 

Cython/Utility/ModuleSetupCode.c

@@ -428,53 +428,6 @@ class __Pyx_FakeReference {
 #define __Pyx_PyFastCFunction_Check(func) 0
 #endif
 
-#if CYTHON_USE_DICT_VERSIONS
-
-#define __PYX_DICT_VERSION_INIT  ((PY_UINT64_T) -1)
-#define __PYX_GET_DICT_VERSION(dict)  (((PyDictObject*)(dict))->ma_version_tag)
-#define __PYX_UPDATE_DICT_CACHE(dict, value, cache_var, version_var) \
-    (version_var) = __PYX_GET_DICT_VERSION(dict); \
-    (cache_var) = (value);
-
-static CYTHON_INLINE PY_UINT64_T __Pyx_get_tp_dict_version(PyObject *obj) {
-    PyObject *dict = Py_TYPE(obj)->tp_dict;
-    return dict ? __PYX_GET_DICT_VERSION(dict) : 0;
-}
-
-static CYTHON_INLINE PY_UINT64_T __Pyx_get_object_dict_version(PyObject *obj) {
-    PyObject **dictptr = NULL;
-    Py_ssize_t offset = Py_TYPE(obj)->tp_dictoffset;
-    if (offset) {
-        dictptr = (offset > 0) ? (PyObject **) ((char *)obj + offset) : _PyObject_GetDictPtr(obj);
-    }
-    return (dictptr && *dictptr) ? __PYX_GET_DICT_VERSION(*dictptr) : 0;
-}
-
-#define __PYX_PY_DICT_LOOKUP_IF_MODIFIED(VAR, DICT, LOOKUP) { \
-    static PY_UINT64_T __pyx_dict_version = 0; \
-    static PyObject *__pyx_dict_cached_value = NULL; \
-    if (likely(__PYX_GET_DICT_VERSION(DICT) == __pyx_dict_version)) { \
-        (VAR) = __pyx_dict_cached_value; \
-    } else { \
-        (VAR) = __pyx_dict_cached_value = (LOOKUP); \
-        __pyx_dict_version = __PYX_GET_DICT_VERSION(DICT); \
-    } \
-}
-
-static CYTHON_INLINE int __Pyx_object_dict_version_matches(PyObject* obj, PY_UINT64_T tp_dict_version, PY_UINT64_T obj_dict_version) {
-    PyObject *dict = Py_TYPE(obj)->tp_dict;
-    if (!dict || tp_dict_version != __PYX_GET_DICT_VERSION(dict))
-        return 0;
-    return obj_dict_version == __Pyx_get_object_dict_version(obj);
-}
-
-#else
-#define __PYX_GET_DICT_VERSION(dict)  (0)
-#define __PYX_UPDATE_DICT_CACHE(dict, value, cache_var, version_var)
-#define __PYX_PY_DICT_LOOKUP_IF_MODIFIED(VAR, DICT, LOOKUP)  (VAR) = (LOOKUP);
-#endif
-// endif: CYTHON_USE_DICT_VERSIONS
-
 #if CYTHON_COMPILING_IN_PYPY && !defined(PyObject_Malloc)
   #define PyObject_Malloc(s)   PyMem_Malloc(s)
   #define PyObject_Free(p)     PyMem_Free(p)

Cython/Utility/ObjectHandling.c

@@ -1165,6 +1165,7 @@ static PyObject *__Pyx__GetNameInClass(PyObject *nmspace, PyObject *name) {
 
 
 /////////////// GetModuleGlobalName.proto ///////////////
+//@requires: PyDictVersioning
 //@substitute: naming
 
 #if CYTHON_USE_DICT_VERSIONS
@@ -2397,3 +2398,59 @@ static PyObject* __Pyx_PyNumber_InPlaceMatrixMultiply(PyObject* x, PyObject* y)
 
 #undef __Pyx_TryMatrixMethod
 #endif
+
+
+/////////////// PyDictVersioning.proto ///////////////
+
+#if CYTHON_USE_DICT_VERSIONS
+#define __PYX_DICT_VERSION_INIT  ((PY_UINT64_T) -1)
+#define __PYX_GET_DICT_VERSION(dict)  (((PyDictObject*)(dict))->ma_version_tag)
+#define __PYX_UPDATE_DICT_CACHE(dict, value, cache_var, version_var) \
+    (version_var) = __PYX_GET_DICT_VERSION(dict); \
+    (cache_var) = (value);
+
+#define __PYX_PY_DICT_LOOKUP_IF_MODIFIED(VAR, DICT, LOOKUP) { \
+    static PY_UINT64_T __pyx_dict_version = 0; \
+    static PyObject *__pyx_dict_cached_value = NULL; \
+    if (likely(__PYX_GET_DICT_VERSION(DICT) == __pyx_dict_version)) { \
+        (VAR) = __pyx_dict_cached_value; \
+    } else { \
+        (VAR) = __pyx_dict_cached_value = (LOOKUP); \
+        __pyx_dict_version = __PYX_GET_DICT_VERSION(DICT); \
+    } \
+}
+
+static CYTHON_INLINE PY_UINT64_T __Pyx_get_tp_dict_version(PyObject *obj); /*proto*/
+static CYTHON_INLINE PY_UINT64_T __Pyx_get_object_dict_version(PyObject *obj); /*proto*/
+static CYTHON_INLINE int __Pyx_object_dict_version_matches(PyObject* obj, PY_UINT64_T tp_dict_version, PY_UINT64_T obj_dict_version); /*proto*/
+
+#else
+#define __PYX_GET_DICT_VERSION(dict)  (0)
+#define __PYX_UPDATE_DICT_CACHE(dict, value, cache_var, version_var)
+#define __PYX_PY_DICT_LOOKUP_IF_MODIFIED(VAR, DICT, LOOKUP)  (VAR) = (LOOKUP);
+#endif
+
+/////////////// PyDictVersioning ///////////////
+
+#if CYTHON_USE_DICT_VERSIONS
+static CYTHON_INLINE PY_UINT64_T __Pyx_get_tp_dict_version(PyObject *obj) {
+    PyObject *dict = Py_TYPE(obj)->tp_dict;
+    return dict ? __PYX_GET_DICT_VERSION(dict) : 0;
+}
+
+static CYTHON_INLINE PY_UINT64_T __Pyx_get_object_dict_version(PyObject *obj) {
+    PyObject **dictptr = NULL;
+    Py_ssize_t offset = Py_TYPE(obj)->tp_dictoffset;
+    if (offset) {
+        dictptr = (offset > 0) ? (PyObject **) ((char *)obj + offset) : _PyObject_GetDictPtr(obj);
+    }
+    return (dictptr && *dictptr) ? __PYX_GET_DICT_VERSION(*dictptr) : 0;
+}
+
+static CYTHON_INLINE int __Pyx_object_dict_version_matches(PyObject* obj, PY_UINT64_T tp_dict_version, PY_UINT64_T obj_dict_version) {
+    PyObject *dict = Py_TYPE(obj)->tp_dict;
+    if (!dict || tp_dict_version != __PYX_GET_DICT_VERSION(dict))
+        return 0;
+    return obj_dict_version == __Pyx_get_object_dict_version(obj);
+}
+#endif