diff -r ae93017b2930 -r 2fccf735a116 src/share/vm/adlc/output_c.cpp
--- a/src/share/vm/adlc/output_c.cpp	Fri Jun 15 15:37:35 2018 +0000
+++ b/src/share/vm/adlc/output_c.cpp	Mon Jun 18 14:39:46 2018 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 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
@@ -4177,11 +4177,11 @@
   fprintf(fp_cpp,"%s\n", _frame->_c_calling_convention);
   fprintf(fp_cpp,"}\n\n");
   // Java Return Value Location
-  fprintf(fp_cpp,"OptoRegPair Matcher::return_value(int ideal_reg, bool is_outgoing) {\n");
+  fprintf(fp_cpp,"OptoRegPair Matcher::return_value(uint ideal_reg, bool is_outgoing) {\n");
   fprintf(fp_cpp,"%s\n", _frame->_return_value);
   fprintf(fp_cpp,"}\n\n");
   // Native Return Value Location
-  fprintf(fp_cpp,"OptoRegPair Matcher::c_return_value(int ideal_reg, bool is_outgoing) {\n");
+  fprintf(fp_cpp,"OptoRegPair Matcher::c_return_value(uint ideal_reg, bool is_outgoing) {\n");
   fprintf(fp_cpp,"%s\n", _frame->_c_return_value);
   fprintf(fp_cpp,"}\n\n");