use ir_vfprintf in the panic() function

[libfirm] / ir / opt / ldstopt.h

diff --git a/ir/opt/ldstopt.h b/ir/opt/ldstopt.h
index 1c27025..0fa935a 100644 (file)
--- a/ir/opt/ldstopt.h
+++ b/ir/opt/ldstopt.h
@@ -5,7 +5,7 @@
  * Author:      Michael Beck
  * Created:
  * CVS-ID:      $Id$
- * Copyright:   (c) 1998-2004 Universität Karlsruhe
+ * Copyright:   (c) 1998-2007 Universität Karlsruhe
  * Licence:     This file protected by GPL -  GNU GENERAL PUBLIC LICENSE.
  */
 
@@ -23,9 +23,27 @@
 
 /** Load/Store optimization.
  *
- * Removes redundand non-volatile Loads and Stores.
+ * Removes redundant non-volatile Loads and Stores.
  * May introduce Bad nodes if exceptional control flow
- * is removed.
+ * is removed. The following cases are optimized:
+ *
+ * Load without result: A Load which has only a memory use
+ *   is removed.
+ *
+ * Load after Store: A Load after a Store is removed, if
+ *   the Load doesn't have an exception handler OR is in
+ *   the same block as the Store.
+ *
+ * Load after Load: A Load after a Load is removed, if the
+ *   Load doesn't have an exception handler OR is in the
+ *   same block as the previous Load.
+ *
+ * Store before Store: A Store immediately before another
+ *   Store in the same block is removed, if the Store doesn't
+ *   have an exception handler.
+ *
+ * Store after Load: A Store after a Load is removed, if the
+ *   Store doesn't have an exception handler.
  */
 void optimize_load_store(ir_graph *irg);