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diff --git a/gcc/signop.h b/gcc/signop.h
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index 00000000000..05dac902df5
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+++ b/gcc/signop.h
@@ -0,0 +1,35 @@
+/* Operations with SIGNED and UNSIGNED.  -*- C++ -*-
+   Copyright (C) 2012-2013 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 3, or (at your option) any
+later version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#ifndef SIGNOP_H
+#define SIGNOP_H
+
+/* This type is used for the large number of functions that produce
+   different results depending on if the operands are signed types or
+   unsigned types.  The signedness of a tree type can be found by
+   using the TYPE_SIGN macro.  */
+
+enum signop_e {
+  SIGNED,
+  UNSIGNED
+};
+
+typedef enum signop_e signop;
+
+#endif