Fix divmod buitin to call the right special method

Author: msimacek

graalpython/com.oracle.graal.python.test/src/tests/unittest_tags/test_class.txt

@@ -1,7 +1,9 @@
 *graalpython.lib-python.3.test.test_class.ClassTests.testBadTypeReturned
+*graalpython.lib-python.3.test.test_class.ClassTests.testBinaryOps
 *graalpython.lib-python.3.test.test_class.ClassTests.testForExceptionsRaisedInInstanceGetattr2
 *graalpython.lib-python.3.test.test_class.ClassTests.testGetSetAndDel
 *graalpython.lib-python.3.test.test_class.ClassTests.testInit
+*graalpython.lib-python.3.test.test_class.ClassTests.testListAndDictOps
 *graalpython.lib-python.3.test.test_class.ClassTests.testMisc
 *graalpython.lib-python.3.test.test_class.ClassTests.testSFBug532646
 *graalpython.lib-python.3.test.test_class.ClassTests.testSetattrNonStringName

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/BuiltinFunctions.java

@@ -524,12 +524,9 @@ public PTuple doDouble(double a, double b) {
         }
 
         @Specialization
-        public PTuple doObject(VirtualFrame frame, Object a, Object b,
-                        @Cached("FloorDiv.create()") LookupAndCallBinaryNode floordivNode,
-                        @Cached("Mod.create()") LookupAndCallBinaryNode modNode) {
-            Object div = floordivNode.executeObject(frame, a, b);
-            Object mod = modNode.executeObject(frame, a, b);
-            return factory().createTuple(new Object[]{div, mod});
+        public Object doObject(VirtualFrame frame, Object a, Object b,
+                        @Cached("create(__DIVMOD__, __RDIVMOD__)") LookupAndCallBinaryNode callDivmod) {
+            return callDivmod.executeObject(frame, a, b);
         }
 
     }