-/**
- * @file beuse.h
- * @date 27.06.2005
- * @author Sebastian Hack
+/*
+ * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
+ *
+ * This file is part of libFirm.
*
- * Determine future usages of values.
+ * 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.
*
- * Copyright (C) 2005 Universitaet Karlsruhe
- * Released under the GPL
+ * Licensees holding valid libFirm Professional Edition licenses may use
+ * this file in accordance with the libFirm Commercial License.
+ * Agreement provided with the Software.
+ *
+ * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+ * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
*/
-#ifndef _BEUSES_H
-#define _BEUSES_H
+/**
+ * @file
+ * @brief Methods to compute when a value will be used again.
+ * @author Sebastian Hack, Matthias Braun
+ * @date 27.06.2005
+ * @version $Id$
+ */
+#ifndef FIRM_BE_BEUSES_H
+#define FIRM_BE_BEUSES_H
-#include "bearch.h"
+#include "firm_types.h"
#include "belive.h"
-#define USES_INFINITY 1000000
-#define USES_IS_INIFINITE(x) ((x) >= USES_INFINITY)
+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 _loc_t loc_t;
typedef struct _be_uses_t be_uses_t;
-unsigned be_get_next_use(be_uses_t *uses, const ir_node *from,
- unsigned from_step, const ir_node *def, int skip_from_uses);
+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 be_lv_t *lv, const arch_env_t *arch_env, const arch_register_class_t *cls);
+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 */