Use specialized DynamicObjectLibrary

Author: otethal

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/type/PythonManagedClass.java

@@ -353,6 +353,11 @@ public static PythonManagedClass cast(Object object) {
         }
     }
 
+    /**
+     * Sets the {@link PythonObject#HAS_SLOTS_BUT_NO_DICT_FLAG} shape flag in the
+     * {@code instanceShape}. This method must not be called after the type has been initialized and
+     * used.
+     */
     @TruffleBoundary
     public void setHasSlotsButNoDictFlag() {
         instanceShape = Shape.newBuilder(instanceShape).shapeFlags(PythonObject.HAS_SLOTS_BUT_NO_DICT_FLAG).build();

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/attributes/WriteAttributeToObjectNode.java

@@ -119,7 +119,7 @@ protected boolean writeToDynamicStorage(PythonObject object, Object key, Object
                     @CachedLibrary("object") @SuppressWarnings("unused") PythonObjectLibrary lib,
                     @Cached("create()") WriteAttributeToDynamicObjectNode writeAttributeToDynamicObjectNode,
                     @Exclusive @Cached("createBinaryProfile()") ConditionProfile isClassProfile,
-                    @CachedLibrary(limit = "1") @SuppressWarnings("unused") DynamicObjectLibrary dyLib,
+                    @CachedLibrary("object") @SuppressWarnings("unused") DynamicObjectLibrary dyLib,
                     @Exclusive @Cached @SuppressWarnings("unused") IsBuiltinClassProfile exactBuiltinInstanceProfile) {
         handlePythonClass(isClassProfile, object, key);
         return writeAttributeToDynamicObjectNode.execute(object.getStorage(), key, value);