diff -r 04d32e7fad07 -r de95063c0e34 src/share/vm/opto/parse3.cpp
--- a/src/share/vm/opto/parse3.cpp	Tue Jan 14 17:46:48 2014 -0800
+++ b/src/share/vm/opto/parse3.cpp	Fri Jan 24 09:31:53 2014 +0100
@@ -337,7 +337,7 @@
     //   should_be_constant = (oop not scavengable || ScavengeRootsInCode >= 2)
     // An oop is not scavengable if it is in the perm gen.
     if (stable_type != NULL && con_type != NULL && con_type->isa_oopptr())
-      con_type = con_type->join(stable_type);
+      con_type = con_type->join_speculative(stable_type);
     break;
 
   case T_ILLEGAL: