Simplify some decref-set patterns using the __Pyx_Py_XDECREF_SET() macro.

Cython/Utility/Coroutine.c

@@ -1294,8 +1294,6 @@ __Pyx_Coroutine_get_name(__pyx_CoroutineObject *self, CYTHON_UNUSED void *contex
 static int
 __Pyx_Coroutine_set_name(__pyx_CoroutineObject *self, PyObject *value, CYTHON_UNUSED void *context)
 {
-    PyObject *tmp;
-
 #if PY_MAJOR_VERSION >= 3
     if (unlikely(value == NULL || !PyUnicode_Check(value)))
 #else
@@ -1306,10 +1304,8 @@ __Pyx_Coroutine_set_name(__pyx_CoroutineObject *self, PyObject *value, CYTHON_UN
                         "__name__ must be set to a string object");
         return -1;
     }
-    tmp = self->gi_name;
     Py_INCREF(value);
-    self->gi_name = value;
-    Py_XDECREF(tmp);
+    __Pyx_Py_XDECREF_SET(self->gi_name, value);
     return 0;
 }
 
@@ -1326,8 +1322,6 @@ __Pyx_Coroutine_get_qualname(__pyx_CoroutineObject *self, CYTHON_UNUSED void *co
 static int
 __Pyx_Coroutine_set_qualname(__pyx_CoroutineObject *self, PyObject *value, CYTHON_UNUSED void *context)
 {
-    PyObject *tmp;
-
 #if PY_MAJOR_VERSION >= 3
     if (unlikely(value == NULL || !PyUnicode_Check(value)))
 #else
@@ -1338,10 +1332,8 @@ __Pyx_Coroutine_set_qualname(__pyx_CoroutineObject *self, PyObject *value, CYTHO
                         "__qualname__ must be set to a string object");
         return -1;
     }
-    tmp = self->gi_qualname;
     Py_INCREF(value);
-    self->gi_qualname = value;
-    Py_XDECREF(tmp);
+    __Pyx_Py_XDECREF_SET(self->gi_qualname, value);
     return 0;
 }
 

Cython/Utility/CythonFunction.c

@@ -117,14 +117,12 @@ __Pyx_CyFunction_get_doc(__pyx_CyFunctionObject *op, CYTHON_UNUSED void *closure
 static int
 __Pyx_CyFunction_set_doc(__pyx_CyFunctionObject *op, PyObject *value, CYTHON_UNUSED void *context)
 {
-    PyObject *tmp = op->func_doc;
     if (value == NULL) {
         // Mark as deleted
         value = Py_None;
     }
     Py_INCREF(value);
-    op->func_doc = value;
-    Py_XDECREF(tmp);
+    __Pyx_Py_XDECREF_SET(op->func_doc, value);
     return 0;
 }
 
@@ -147,8 +145,6 @@ __Pyx_CyFunction_get_name(__pyx_CyFunctionObject *op, CYTHON_UNUSED void *contex
 static int
 __Pyx_CyFunction_set_name(__pyx_CyFunctionObject *op, PyObject *value, CYTHON_UNUSED void *context)
 {
-    PyObject *tmp;
-
 #if PY_MAJOR_VERSION >= 3
     if (unlikely(value == NULL || !PyUnicode_Check(value)))
 #else
@@ -159,10 +155,8 @@ __Pyx_CyFunction_set_name(__pyx_CyFunctionObject *op, PyObject *value, CYTHON_UN
                         "__name__ must be set to a string object");
         return -1;
     }
-    tmp = op->func_name;
     Py_INCREF(value);
-    op->func_name = value;
-    Py_XDECREF(tmp);
+    __Pyx_Py_XDECREF_SET(op->func_name, value);
     return 0;
 }
 
@@ -176,8 +170,6 @@ __Pyx_CyFunction_get_qualname(__pyx_CyFunctionObject *op, CYTHON_UNUSED void *co
 static int
 __Pyx_CyFunction_set_qualname(__pyx_CyFunctionObject *op, PyObject *value, CYTHON_UNUSED void *context)
 {
-    PyObject *tmp;
-
 #if PY_MAJOR_VERSION >= 3
     if (unlikely(value == NULL || !PyUnicode_Check(value)))
 #else
@@ -188,10 +180,8 @@ __Pyx_CyFunction_set_qualname(__pyx_CyFunctionObject *op, PyObject *value, CYTHO
                         "__qualname__ must be set to a string object");
         return -1;
     }
-    tmp = op->func_qualname;
     Py_INCREF(value);
-    op->func_qualname = value;
-    Py_XDECREF(tmp);
+    __Pyx_Py_XDECREF_SET(op->func_qualname, value);
     return 0;
 }
 
@@ -222,8 +212,6 @@ __Pyx_CyFunction_get_dict(__pyx_CyFunctionObject *op, CYTHON_UNUSED void *contex
 static int
 __Pyx_CyFunction_set_dict(__pyx_CyFunctionObject *op, PyObject *value, CYTHON_UNUSED void *context)
 {
-    PyObject *tmp;
-
     if (unlikely(value == NULL)) {
         PyErr_SetString(PyExc_TypeError,
                "function's dictionary may not be deleted");
@@ -234,10 +222,8 @@ __Pyx_CyFunction_set_dict(__pyx_CyFunctionObject *op, PyObject *value, CYTHON_UN
                "setting function's dictionary to a non-dict");
         return -1;
     }
-    tmp = op->func_dict;
     Py_INCREF(value);
-    op->func_dict = value;
-    Py_XDECREF(tmp);
+    __Pyx_Py_XDECREF_SET(op->func_dict, value);
     return 0;
 }
 
@@ -290,7 +276,6 @@ __Pyx_CyFunction_init_defaults(__pyx_CyFunctionObject *op) {
 
 static int
 __Pyx_CyFunction_set_defaults(__pyx_CyFunctionObject *op, PyObject* value, CYTHON_UNUSED void *context) {
-    PyObject* tmp;
     if (!value) {
         // del => explicit None to prevent rebuilding
         value = Py_None;
@@ -300,9 +285,7 @@ __Pyx_CyFunction_set_defaults(__pyx_CyFunctionObject *op, PyObject* value, CYTHO
         return -1;
     }
     Py_INCREF(value);
-    tmp = op->defaults_tuple;
-    op->defaults_tuple = value;
-    Py_XDECREF(tmp);
+    __Pyx_Py_XDECREF_SET(op->defaults_tuple, value);
     return 0;
 }
 
@@ -323,7 +306,6 @@ __Pyx_CyFunction_get_defaults(__pyx_CyFunctionObject *op, CYTHON_UNUSED void *co
 
 static int
 __Pyx_CyFunction_set_kwdefaults(__pyx_CyFunctionObject *op, PyObject* value, CYTHON_UNUSED void *context) {
-    PyObject* tmp;
     if (!value) {
         // del => explicit None to prevent rebuilding
         value = Py_None;
@@ -333,9 +315,7 @@ __Pyx_CyFunction_set_kwdefaults(__pyx_CyFunctionObject *op, PyObject* value, CYT
         return -1;
     }
     Py_INCREF(value);
-    tmp = op->defaults_kwdict;
-    op->defaults_kwdict = value;
-    Py_XDECREF(tmp);
+    __Pyx_Py_XDECREF_SET(op->defaults_kwdict, value);
     return 0;
 }
 
@@ -356,7 +336,6 @@ __Pyx_CyFunction_get_kwdefaults(__pyx_CyFunctionObject *op, CYTHON_UNUSED void *
 
 static int
 __Pyx_CyFunction_set_annotations(__pyx_CyFunctionObject *op, PyObject* value, CYTHON_UNUSED void *context) {
-    PyObject* tmp;
     if (!value || value == Py_None) {
         value = NULL;
     } else if (!PyDict_Check(value)) {
@@ -365,9 +344,7 @@ __Pyx_CyFunction_set_annotations(__pyx_CyFunctionObject *op, PyObject* value, CY
         return -1;
     }
     Py_XINCREF(value);
-    tmp = op->func_annotations;
-    op->func_annotations = value;
-    Py_XDECREF(tmp);
+    __Pyx_Py_XDECREF_SET(op->func_annotations, value);
     return 0;
 }
 
@@ -1222,9 +1199,8 @@ __pyx_err:
             __pyx_FusedFunctionObject *unbound = (__pyx_FusedFunctionObject *) unbound_result_func;
 
             // TODO: move this to InitClassCell
-            Py_CLEAR(unbound->func.func_classobj);
             Py_XINCREF(self->func.func_classobj);
-            unbound->func.func_classobj = self->func.func_classobj;
+            __Pyx_Py_XDECREF_SET(unbound->func.func_classobj, self->func.func_classobj);
 
             result_func = __pyx_FusedFunction_descr_get(unbound_result_func,
                                                         self->self, self->self);
@@ -1320,8 +1296,7 @@ __pyx_FusedFunction_call(PyObject *func, PyObject *args, PyObject *kw)
             goto bad;
 
         Py_XINCREF(binding_func->func.func_classobj);
-        Py_CLEAR(new_func->func.func_classobj);
-        new_func->func.func_classobj = binding_func->func.func_classobj;
+        __Pyx_Py_XDECREF_SET(new_func->func.func_classobj, binding_func->func.func_classobj);
 
         func = (PyObject *) new_func;
     }

Cython/Utility/ModuleSetupCode.c

@@ -1377,6 +1377,10 @@ static CYTHON_INLINE int __Pyx_Is_Little_Endian(void)
   #define __Pyx_XGIVEREF(r)
 #endif /* CYTHON_REFNANNY */
 
+#define __Pyx_Py_XDECREF_SET(r, v) do {                         \
+        PyObject *tmp = (PyObject *) r;                         \
+        r = v; Py_XDECREF(tmp);                                 \
+    } while (0)
 #define __Pyx_XDECREF_SET(r, v) do {                            \
         PyObject *tmp = (PyObject *) r;                         \
         r = v; __Pyx_XDECREF(tmp);                              \