removed unused header

[libfirm] / ir / opt / strength_red.c

diff --git a/ir/opt/strength_red.c b/ir/opt/strength_red.c
index 0a9ae3a..804d7b5 100644 (file)
--- a/ir/opt/strength_red.c
+++ b/ir/opt/strength_red.c
@@ -1,3 +1,22 @@
+/*
+ * Copyright (C) 1995-2007 University of Karlsruhe.  All right reserved.
+ *
+ * This file is part of libFirm.
+ *
+ * This file may be distributed and/or modified under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation and appearing in the file LICENSE.GPL included in the
+ * packaging of this file.
+ *
+ * Licensees holding valid libFirm Professional Edition licenses may use
+ * this file in accordance with the libFirm Commercial License.
+ * Agreement provided with the Software.
+ *
+ * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+ * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+
 /**
  *
  * @file strength_red.c
@@ -10,7 +29,6 @@
  * Created:     22.8.2004
  * CVS-ID:      $Id$
  * Copyright:   (c) 2004 Universität Karlsruhe
- * Licence:     This file protected by GPL -  GNU GENERAL PUBLIC LICENSE.
  */
 #ifdef HAVE_CONFIG_H
 #include "config.h"
@@ -38,10 +56,10 @@ static int n_made_new_phis;
  * @verbatim
  *
  *       init
- *       /|\
+ *        ^
  *        |
  *   +-- Phi
- *   |   /|\
+ *   |    ^
  *   |    |
  *   +-->op
  *
@@ -568,12 +586,13 @@ static void reduce_itervar(ir_node *itervar_phi, void *env)
   /* check if a iteration variable be reduced.*/
   int reduced = 0;
 
-  if (get_irn_op(itervar_phi) != op_Phi)
+  if (! is_Phi(itervar_phi))
     return;
-  /* A candidate is found.*/
+
+  /* A potential candidate is found.*/
   ivi.itervar_phi = itervar_phi;
 
-  /* It musss be a induction variable.*/
+  /* check if it's a induction variable.*/
   if (is_induction_variable(&ivi)) {
     int i, op_out;