convert bitfield initializer tarvals before using them

[libfirm] / ir / be / bespillbelady.c

diff --git a/ir/be/bespillbelady.c b/ir/be/bespillbelady.c
index 6f0b45a..0966693 100644 (file)
--- a/ir/be/bespillbelady.c
+++ b/ir/be/bespillbelady.c
@@ -870,10 +870,14 @@ static void fix_block_borders(ir_node *block, void *data)
        DB((dbg, DBG_FIX, "\n"));
        DB((dbg, DBG_FIX, "Fixing %+F\n", block));
 
+       arity = get_irn_arity(block);
+       /* can happen for endless loops */
+       if (arity == 0)
+               return;
+
        start_workset = get_block_info(block)->start_workset;
 
        /* process all pred blocks */
-       arity = get_irn_arity(block);
        for (i = 0; i < arity; ++i) {
                ir_node   *pred = get_Block_cfgpred_block(block, i);
                workset_t *pred_end_workset = get_block_info(pred)->end_workset;