--- old/src/share/vm/runtime/arguments.cpp	2012-10-08 20:36:57.762006082 +0200
+++ new/src/share/vm/runtime/arguments.cpp	2012-10-08 20:36:57.560934392 +0200
@@ -1423,10 +1423,9 @@
     FLAG_SET_DEFAULT(UseCompressedKlassPointers, false);
   } else {
     // Turn on UseCompressedKlassPointers too
-    // The compiler is broken for this so turn it on when the compiler is fixed.
-    // if (FLAG_IS_DEFAULT(UseCompressedKlassPointers)) {
-    //   FLAG_SET_ERGO(bool, UseCompressedKlassPointers, true);
-    // }
+    if (FLAG_IS_DEFAULT(UseCompressedKlassPointers)) {
+      FLAG_SET_ERGO(bool, UseCompressedKlassPointers, true);
+    }
     // Set the ClassMetaspaceSize to something that will not need to be
     // expanded, since it cannot be expanded.
     if (UseCompressedKlassPointers && FLAG_IS_DEFAULT(ClassMetaspaceSize)) {