/*
- * Copyright (C) 1995-2007 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.
- *
- * 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.
+ * Copyright (C) 2012 Inria Rhone-Alpes.
*/
/**
- * @file irlivechk.h
+ * @file
* @author Sebastian Hack
* @date 22.04.2007
- * @version $Id$
- * @summary
+ * @brief
*
* Live in/end checks whose only precomputation concerns the structure of the CFG.
* Hence, nothing has to be updated if the program is modified unless the CFG is touched.
* See .c file for more comments.
*/
+
#ifndef FIRM_ANA_IRLIVECHK_H
#define FIRM_ANA_IRLIVECHK_H
#include "irgraph.h"
#include "irnode.h"
+#include <stdbool.h>
-typedef struct _lv_chk_t lv_chk_t;
+typedef enum {
+ lv_chk_state_in = 1,
+ lv_chk_state_end = 2,
+ lv_chk_state_out = 4,
+ lv_chk_state_through = lv_chk_state_in | lv_chk_state_out | lv_chk_state_end,
+} lv_chk_state_t;
+
+typedef struct lv_chk_t lv_chk_t;
+
+/**
+ * Filter out some nodes for which we never need liveness.
+ *
+ * @param irn the node t check
+ * @return 0 if no liveness info is needed, 1 else
+ */
+static inline bool is_liveness_node(const ir_node *irn)
+{
+ switch (get_irn_opcode(irn)) {
+ case iro_Block:
+ case iro_Bad:
+ case iro_End:
+ case iro_Anchor:
+ case iro_NoMem:
+ return 0;
+ default:
+ return 1;
+ }
+}
/**
* Make a new liveness check environment.
*/
extern void lv_chk_free(lv_chk_t *lv);
-/**
- * Check, if a node is live end of a given block.
- * @param lv The liveness environment.
- * @param bl The block to investigate.
- * @param irn The node to check for.
- * @return 1, if @p what is live end at @p bl, 0 else.
- */
-extern int lv_chk_bl_end(const lv_chk_t *lv, const ir_node *bl, const ir_node *irn);
/**
- * Check, if a node is live out of a given block.
+ * Return liveness information for a node concerning a block.
* @param lv The liveness environment.
* @param bl The block to investigate.
* @param irn The node to check for.
- * @return 1, if @p what is live out at @p bl, 0 else.
+ * @return A bitmask of <code>lv_chk_state_t</code>.
*/
-extern int lv_chk_bl_out(const lv_chk_t *lv, const ir_node *bl, const ir_node *irn);
+extern unsigned lv_chk_bl_xxx(lv_chk_t *lv, const ir_node *bl, const ir_node *irn);
-/**
- * Check, if a node is live in of a given block.
- * @param lv The liveness environment.
- * @param bl The block to investigate.
- * @param irn The node to check for.
- * @return 1, if @p what is live in at @p bl, 0 else.
- */
-extern int lv_chk_bl_in(const lv_chk_t *lv, const ir_node *bl, const ir_node *irn);
+#define lv_chk_bl_in(lv, bl, irn) ((lv_chk_bl_xxx((lv), (bl), (irn)) & lv_chk_state_in) != 0)
+#define lv_chk_bl_end(lv, bl, irn) ((lv_chk_bl_xxx((lv), (bl), (irn)) & lv_chk_state_end) != 0)
+#define lv_chk_bl_out(lv, bl, irn) ((lv_chk_bl_xxx((lv), (bl), (irn)) & lv_chk_state_out) != 0)
#endif /* FIRM_ANA_IRLIVECHK_H */