Improve TypeNodes.ProfileClassNode for built-in classes

Author: fangerer

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

@@ -138,6 +138,7 @@
 import com.oracle.truffle.api.CompilerAsserts;
 import com.oracle.truffle.api.CompilerDirectives;
 import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
+import com.oracle.truffle.api.dsl.Bind;
 import com.oracle.truffle.api.dsl.Cached;
 import com.oracle.truffle.api.dsl.Cached.Shared;
 import com.oracle.truffle.api.dsl.CachedContext;
@@ -1191,6 +1192,13 @@ static PythonBuiltinClassType doPythonBuiltinClassType(@SuppressWarnings("unused
             return cachedClassType;
         }
 
+        @Specialization(guards = {"classType == cachedClassType"}, limit = "1")
+        static PythonBuiltinClassType doPythonBuiltinClassType(@SuppressWarnings("unused") PythonBuiltinClass builtinClass,
+                        @Bind("builtinClass.getType()") @SuppressWarnings("unused") PythonBuiltinClassType classType,
+                        @Cached("classType") PythonBuiltinClassType cachedClassType) {
+            return cachedClassType;
+        }
+
         @Specialization(guards = "isPythonAbstractClass(object)", assumptions = "singleContextAssumption()", rewriteOn = NotSameTypeException.class)
         static Object doPythonAbstractClass(Object object,
                         @Cached(value = "object", weak = true) Object cachedObject,