CVS:

[libfirm] / ir / ir / irgopt.h

diff --git a/ir/ir/irgopt.h b/ir/ir/irgopt.h
index aef48b4..f64f7ec 100644 (file)
--- a/ir/ir/irgopt.h
+++ b/ir/ir/irgopt.h
@@ -1,11 +1,9 @@
-/* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
+/* Copyright (C) 1998 - 2001 by Universitaet Karlsruhe
 ** All rights reserved.
 **
-** Author: Christian Schaefer
+** Author: Christian Schaefer, Goetz Lindenmaier
 **
-**  dead node elemination
-**  walks one time through the whole graph and copies it into another graph,
-**  so unreachable nodes will be lost.
+** Optimizations for a whole ir graph, i.e., a procedure.
 */
 
 # ifndef _IRGOPT_H_
@@ -13,9 +11,14 @@
 
 # include "irgraph.h"
 
-
+/* Applies local optimizations (see iropt.h) to all nodes in the graph. */
 void local_optimize_graph (ir_graph *irg);
 
-void dead_node_elemination(ir_graph *irg);
+/* Performs dead node elimination by copying the ir graph to a new obstack.
+   Further removes Bad predecesors from Blocks and the corresponding
+   inputs to Phi nodes.
+   Attention: the numbers assigned to nodes if the library is compiled for
+   development/debugging are not conserved by copying. */
+void dead_node_elimination(ir_graph *irg);
 
 # endif /* _IRGOPT_H_ */