X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fana%2Firlivechk.h;h=0c7b790c62bbd5228dc5be6e86e8fb73f9cf3866;hb=e97a86a5e90141c2cb4ccdc34195cab035627c3f;hp=ded033b0cf996559a02cd895181bb59d3489f906;hpb=51e652d857c3448114970916285fdbebecdd968b;p=libfirm

diff --git a/ir/ana/irlivechk.h b/ir/ana/irlivechk.h
index ded033b0c..0c7b790c6 100644
--- a/ir/ana/irlivechk.h
+++ b/ir/ana/irlivechk.h
@@ -1,24 +1,10 @@
 /*
- * Copyright (C) 1995-2007 Inria Rhone-Alpes.  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
  * @brief
@@ -33,6 +19,7 @@
 
 #include "irgraph.h"
 #include "irnode.h"
+#include <stdbool.h>
 
 typedef enum {
 	lv_chk_state_in  = 1,
@@ -43,6 +30,26 @@ typedef enum {
 
 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.
  * @param irg The graph.