--- old/src/share/vm/opto/chaitin.cpp	2018-06-18 09:07:30.481367747 -0700
+++ new/src/share/vm/opto/chaitin.cpp	2018-06-18 09:07:30.365357346 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -755,7 +755,7 @@
         const RegMask &rm = n->out_RegMask();
         lrg.AND( rm );
 
-        int ireg = n->ideal_reg();
+        uint ireg = n->ideal_reg();
         assert( !n->bottom_type()->isa_oop_ptr() || ireg == Op_RegP,
                 "oops must be in Op_RegP's" );
 
@@ -961,7 +961,7 @@
 
         // Check for bound register masks
         const RegMask &lrgmask = lrg.mask();
-        int kreg = n->in(k)->ideal_reg();
+        uint kreg = n->in(k)->ideal_reg();
         bool is_vect = RegMask::is_vector(kreg);
         assert(n->in(k)->bottom_type()->isa_vect() == NULL ||
                is_vect || kreg == Op_RegD || kreg == Op_RegL,