X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fana%2Firlivechk.h;h=6b3c1ecc67cf6f1dba1e0f1f074f439b38a15297;hb=e775a978fff2841e0722c47f13545b54d48b8f98;hp=44ecd183f49c53fe5294aa54ac772ec21d129065;hpb=6c694085a1d9ea8d0be49170e2f1ce64682f4d54;p=libfirm

diff --git a/ir/ana/irlivechk.h b/ir/ana/irlivechk.h
index 44ecd183f..6b3c1ecc6 100644
--- a/ir/ana/irlivechk.h
+++ b/ir/ana/irlivechk.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 1995-2007 University of Karlsruhe.  All right reserved.
+ * Copyright (C) 1995-2007 Inria Rhone-Alpes.  All right reserved.
  *
  * This file is part of libFirm.
  *
@@ -21,30 +21,37 @@
  * @file    irlivechk.h
  * @author  Sebastian Hack
  * @date    22.04.2007
- * @version $Id: $
- * @summary
+ * @version $Id$
+ * @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.
- *
- * Copyright (C) 2007 Universitaet Karlsruhe
- * Released under the GPL
  */
+
 #ifndef FIRM_ANA_IRLIVECHK_H
 #define FIRM_ANA_IRLIVECHK_H
 
 #include "irgraph.h"
 #include "irnode.h"
+#include "dfs.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;
 
 /**
  * Make a new liveness check environment.
  * @param irg The graph.
+ * @param dfs A forward DFS on CFG of the given irg.
  * @return    The environment.
  */
-extern lv_chk_t *lv_chk_new(ir_graph *irg);
+extern lv_chk_t *lv_chk_new(ir_graph *irg, const dfs_t *dfs);
 
 /**
  * Free liveness check information.
@@ -52,31 +59,18 @@ extern lv_chk_t *lv_chk_new(ir_graph *irg);
  */
 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(const 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 */