X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fir%2Firopt.h;h=2bfc58a41f0b7b378242f90b0a6e9819029add7d;hb=637542932dc27dcdfc7def09b58d9d5d4c34fb77;hp=e2e461d5a791139cc7e87e78912db18facde0e6c;hpb=328ae18da3e796f4f9fda2aba629cc34e2849ed7;p=libfirm

diff --git a/ir/ir/iropt.h b/ir/ir/iropt.h
index e2e461d5a..2bfc58a41 100644
--- a/ir/ir/iropt.h
+++ b/ir/ir/iropt.h
@@ -1,12 +1,23 @@
-/* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
-** All rights reserved.
-**
-** Authors: Martin Trapp, Christian Schaefer
-**
-** Declarations for optimizations intertwined with IR construction.
+/*
+ * Project:     libFIRM
+ * File name:   ir/ir/iropt.h
+ * Purpose:     iropt --- optimizations of an ir node.
+ * Author:      Martin Trapp, Christian Schaefer
+ * Modified by: Goetz Lindenmaier
+ * Created:
+ * CVS-ID:      $Id$
+ * Copyright:   (c) 1998-2003 Universität Karlsruhe
+ * Licence:     This file protected by GPL -  GNU GENERAL PUBLIC LICENSE.
+ */
+
+/**
+* @file iropt.h
+*
+* Declarations for optimizations of an ir node.
+*
+* @author Martin Trapp, Christian Schaefer
 */
 
-/* $Id$ */
 
 # ifndef _IROPT_H_
 # define _IROPT_H_
@@ -15,19 +26,19 @@
 # include "irgraph.h"
 # include "irflag.h"
 
-/* optimize_in_place (n) may change the contents of the ir_node itself,
-   [e.g. by making it a Id-node], but does not change its identity.
-   So it is safe to be called on already referenced nodes.
-
-   optimize_in_place (n) returns a pointer to a node equivalent to `n'
-   which should be used instead of `n'.
-
-   optimize (n) may deallocate `n' and everything allocated after `n'! */
-
-tarval  *computed_value (ir_node *n);
-
-ir_node *optimize (ir_node *n);
-
+/** If the expression referenced can be evaluated statically
+ *  computed_value returns a tarval representing the result.
+ *  Else returns tarval_bad. */
+tarval *computed_value (ir_node *n);
+
+/** Applies all optimizations to n that are expressible as a pattern
+ *  in Firm, i.e., they need not a walk of the graph.
+ *  Returns a better node for n.  Does not free n -- other nodes could
+ *  reference n.
+ *
+ *  An equivalent optimization is applied in the constructors defined in
+ *  ircons.ch.  There n is freed if a better node could be found.
+ */
 ir_node *optimize_in_place (ir_node *n);
 
 # endif /* _IROPT_H_ */