--- a/hotspot/src/share/vm/opto/loopTransform.cpp	Wed Oct 16 10:52:41 2013 +0200
+++ b/hotspot/src/share/vm/opto/loopTransform.cpp	Tue Nov 05 17:38:04 2013 -0800
@@ -713,6 +713,10 @@
       case Op_ModL: body_size += 30; break;
       case Op_DivL: body_size += 30; break;
       case Op_MulL: body_size += 10; break;
+      case Op_FlagsProj:
+        // Can't handle unrolling of loops containing
+        // nodes that generate a FlagsProj at the moment
+        return false;
       case Op_StrComp:
       case Op_StrEquals:
       case Op_StrIndexOf:
@@ -776,6 +780,9 @@
         continue; // not RC
 
       Node *cmp = bol->in(1);
+      if (cmp->is_FlagsProj()) {
+        continue;
+      }
 
       Node *rc_exp = cmp->in(1);
       Node *limit = cmp->in(2);