give Bad nodes a mode

[libfirm] / ir / be / bedomfront.c

diff --git a/ir/be/bedomfront.c b/ir/be/bedomfront.c
index dd54d1d..6736b34 100644 (file)
--- a/ir/be/bedomfront.c
+++ b/ir/be/bedomfront.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
+ * Copyright (C) 1995-2011 University of Karlsruhe.  All right reserved.
  *
  * This file is part of libFirm.
  *
@@ -72,7 +72,7 @@ static ir_node **compute_df(ir_node *blk, be_dom_front_info_t *info)
        const ir_edge_t *edge;
        ir_node **df_list = NEW_ARR_F(ir_node *, 0);
        ir_node **df;
-       int len;
+       size_t len;
 
        /* Add local dominance frontiers */
        foreach_block_succ(blk, edge) {
@@ -89,11 +89,11 @@ static ir_node **compute_df(ir_node *blk, be_dom_front_info_t *info)
         * dominated by the given block.
         */
        for (c = get_Block_dominated_first(blk); c; c = get_Block_dominated_next(c)) {
-               int i;
+               size_t i;
                ir_node **df_c_list = compute_df(c, info);
 
-               for (i = ARR_LEN(df_c_list) - 1; i >= 0; --i) {
-                       ir_node *w = df_c_list[i];
+               for (i = ARR_LEN(df_c_list); i > 0;) {
+                       ir_node *w = df_c_list[--i];
                        if (get_idom(w) != blk)
                                ARR_APP1(ir_node *, df_list, w);
                }