diff -r ae93017b2930 -r 2fccf735a116 src/share/vm/opto/matcher.cpp
--- a/src/share/vm/opto/matcher.cpp	Fri Jun 15 15:37:35 2018 +0000
+++ b/src/share/vm/opto/matcher.cpp	Mon Jun 18 14:39:46 2018 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 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
@@ -193,7 +193,7 @@
   const TypeTuple *range = C->tf()->range();
   if( range->cnt() > TypeFunc::Parms ) { // If not a void function
     // Get ideal-register return type
-    int ireg = range->field_at(TypeFunc::Parms)->ideal_reg();
+    uint ireg = range->field_at(TypeFunc::Parms)->ideal_reg();
     // Get machine return register
     uint sop = C->start()->Opcode();
     OptoRegPair regs = return_value(ireg, false);