-/* Copyright (C) 1998 - 2001 by Universitaet Karlsruhe
-* All rights reserved.
-*/
+/*
+ * Project: libFIRM
+ * File name: ir/ir/irgopt.h
+ * Purpose: Optimizations for a whole ir graph, i.e., a procedure.
+ * Author: Christian Schaefer, Goetz Lindenmaier
+ * Modified by: Sebastian Felis
+ * Created:
+ * CVS-ID: $Id$
+ * Copyright: (c) 1998-2003 Universität Karlsruhe
+ * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
+ */
/**
-* @file irgopts.h
-*
-* Optimizations for a whole ir graph, i.e., a procedure.
-*
-* @author Christian Schaefer, Goetz Lindenmaier
-*/
-
-/* $Id$ */
+ * @file irgopt.h
+ *
+ * Optimizations for a whole ir graph, i.e., a procedure.
+ *
+ * @author Christian Schaefer, Goetz Lindenmaier
+ */
# ifndef _IRGOPT_H_
# define _IRGOPT_H_
/** Control flow optimization.
* Removes empty blocks doing if simplifications and loop simplifications.
- * A block is empty if it contains only a Jmp node and
- * Phi nodes.
+ * A block is empty if it contains only a Jmp node and Phi nodes.
* Merges single entry single exit blocks with their predecessor
* and propagates dead control flow by calling equivalent_node.
* Independent of compiler flag it removes Tuples from cf edges,
* Bad predecessors form blocks and unnecessary predecessors of End.
*
* @bug So far destroys backedge information.
+ * @bug Chokes on Id nodes if called in a certain order with other
+ * optimizations. Call local_optimize_graph before to remove
+ * Ids.
*/
void optimize_cf(ir_graph *irg);
+
/** Places an empty basic block on critical control flow edges thereby
removing them.
-
A critical control flow edge is an edge from a block with several
control exits to a block with several control entries (See Muchnic
p. 407).
-
- @todo not yet implemented!!! */
+ Is only executed if flag set_opt_critical_edges() is set.
+ @param irg IR Graph
+*/
void remove_critical_cf_edges(ir_graph *irg);
# endif /* _IRGOPT_H_ */