slight bugfix

[libfirm] / ir / be / belive.c

diff --git a/ir/be/belive.c b/ir/be/belive.c
index 646cd4b..753a510 100644 (file)
--- a/ir/be/belive.c
+++ b/ir/be/belive.c
@@ -23,6 +23,19 @@
 #define LV_USE_BINARY_SEARCH
 #undef  LV_INTESIVE_CHECKS
 
+static INLINE int is_liveness_node(const ir_node *irn)
+{
+       switch(get_irn_opcode(irn)) {
+       case iro_Block:
+       case iro_Bad:
+       case iro_End:
+               return 0;
+       default:;
+       }
+
+       return 1;
+}
+
 int (be_lv_next_irn)(const struct _be_lv_t *lv, const ir_node *bl, unsigned flags, int i)
 {
        return _be_lv_next_irn(lv, bl, flags, i);
@@ -334,7 +347,7 @@ static void liveness_for_node(ir_node *irn, void *data)
        ir_node *def_block;
 
        /* Don't compute liveness information for non-data nodes. */
-       if(!is_data_node(irn))
+       if(!is_liveness_node(irn))
                return;
 
        bitset_clear_all(visited);
@@ -346,29 +359,29 @@ static void liveness_for_node(ir_node *irn, void *data)
                ir_node *use_block;
 
                /*
-               * If the usage is no data node, skip this use, since it does not
-               * affect the liveness of the node.
-               */
-               if(!is_data_node(use))
+                * If the usage is no data node, skip this use, since it does not
+                * affect the liveness of the node.
+                */
+               if(!is_liveness_node(use))
                        continue;
 
                /* Get the block where the usage is in. */
                use_block = get_nodes_block(use);
 
                /*
-               * If the use is a phi function, determine the corresponding block
-               * through which the value reaches the phi function and mark the
-               * value as live out of that block.
-               */
+                * If the use is a phi function, determine the corresponding block
+                * through which the value reaches the phi function and mark the
+                * value as live out of that block.
+                */
                if(is_Phi(use)) {
                        ir_node *pred_block = get_Block_cfgpred_block(use_block, edge->pos);
                        live_end_at_block(lv, irn, pred_block, visited, 0);
                }
 
                /*
-               * Else, the value is live in at this block. Mark it and call live
-               * out on the predecessors.
-               */
+                * Else, the value is live in at this block. Mark it and call live
+                * out on the predecessors.
+                */
                else if(def_block != use_block) {
                        int i, n;