- fixed comment: bs cannot be NULL anymore (and was never NULL previously)

[libfirm] / ir / be / beuses.h

diff --git a/ir/be/beuses.h b/ir/be/beuses.h
index 604ae0d..17b838a 100644 (file)
--- a/ir/be/beuses.h
+++ b/ir/be/beuses.h
@@ -1,35 +1,62 @@
-/**
- * @file   beuse.h
- * @date   27.06.2005
- * @author Sebastian Hack, Matthias Braun
+/*
+ * Copyright (C) 1995-2008 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.
  *
- * Determine future usages of values.
+ * Licensees holding valid libFirm Professional Edition licenses may use
+ * this file in accordance with the libFirm Commercial License.
+ * Agreement provided with the Software.
  *
- * Copyright (C) 2005 Universitaet Karlsruhe
- * Released under the GPL
+ * 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
+ * @brief       Methods to compute when a value will be used again.
+ * @author      Sebastian Hack, Matthias Braun
+ * @date        27.06.2005
+ * @version     $Id$
  */
-#ifndef _BEUSES_H
-#define _BEUSES_H
+#ifndef FIRM_BE_BEUSES_H
+#define FIRM_BE_BEUSES_H
 
-#include "bearch.h"
+#include "firm_types.h"
 #include "belive.h"
 
-#define USES_INFINITY                 1000000
+typedef struct _be_next_use_t {
+       unsigned       time;
+       int            outermost_loop;
+       const ir_node *before;
+} be_next_use_t;
+
+#define USES_INFINITY  10000000
+#define USES_PENDING   9999999
 
 static INLINE int USES_IS_INFINITE(unsigned time)
 {
        return time >= USES_INFINITY;
 }
 
+static INLINE int USES_IS_PENDING(unsigned time)
+{
+       return time == USES_PENDING;
+}
+
 typedef struct _be_uses_t be_uses_t;
 
-unsigned be_get_next_use(be_uses_t *uses, const ir_node *from,
+be_next_use_t be_get_next_use(be_uses_t *uses, ir_node *from,
                          unsigned from_step, const ir_node *def,
                          int skip_from_uses);
 
-be_uses_t *be_begin_uses(ir_graph *irg, const exec_freq_t *execfreqs,
-                         const be_lv_t *lv);
+be_uses_t *be_begin_uses(ir_graph *irg, const be_lv_t *lv);
 
 void be_end_uses(be_uses_t *uses);
 
-#endif /* _BEUSES_H */
+#endif /* FIRM_BE_BEUSES_H */