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+------------------------------------------------------------------------------
+-- --
+-- GNAT COMPILER COMPONENTS --
+-- --
+-- H L O --
+-- --
+-- S p e c --
+-- --
+-- Copyright (C) 1998-2007, Free Software Foundation, Inc. --
+-- --
+-- GNAT is free software; you can redistribute it and/or modify it under --
+-- terms of the GNU General Public License as published by the Free Soft- --
+-- ware Foundation; either version 3, or (at your option) any later ver- --
+-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT 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 distributed with GNAT; see file COPYING3. If not, go to --
+-- http://www.gnu.org/licenses for a complete copy of the license. --
+-- --
+-- GNAT was originally developed by the GNAT team at New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
+-- --
+------------------------------------------------------------------------------
+
+with Types; use Types;
+
+package HLO is
+
+ procedure High_Level_Optimize (N : Node_Id);
+ -- This procedure activates the high level optimizer. At the time it is
+ -- called, the tree for compilation unit N has been fully analyzed, but
+ -- not expanded, but the Analyzed flags have been reset. On return, the
+ -- tree may be modified (and will be reanalyzed and expanded as required).
+
+end HLO;