remove more unused loop stuff

[libfirm] / ir / ana / irlivechk.h

diff --git a/ir/ana/irlivechk.h b/ir/ana/irlivechk.h
index 750dd0c..87405fa 100644 (file)
--- a/ir/ana/irlivechk.h
+++ b/ir/ana/irlivechk.h
@@ -33,7 +33,7 @@
 
 #include "irgraph.h"
 #include "irnode.h"
-#include "dfs.h"
+#include <stdbool.h>
 
 typedef enum {
        lv_chk_state_in  = 1,
@@ -44,13 +44,32 @@ 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.
- * @param dfs A forward DFS on CFG of the given irg.
  * @return    The environment.
  */
-extern lv_chk_t *lv_chk_new(ir_graph *irg, const dfs_t *dfs);
+extern lv_chk_t *lv_chk_new(ir_graph *irg);
 
 /**
  * Free liveness check information.