end block can also have 0 predecessors

[r16374]

diff --git a/ir/be/beblocksched.c b/ir/be/beblocksched.c
index 953ca6d..69422b5 100644 (file)
--- a/ir/be/beblocksched.c
+++ b/ir/be/beblocksched.c
@@ -147,8 +147,10 @@ static void collect_egde_frequency(ir_node *block, void *data)
        arity = get_Block_n_cfgpreds(block);
 
        if (arity == 0) {
-               assert(block == get_irg_start_block(env->irg));
-               /* must be the start block, nothing to do here */
+               assert(block == get_irg_start_block(env->irg)
+                               || block == get_irg_end_block(env->irg));
+               /* must be the start block (or end-block for endless loops), nothing to
+                * do here */
                return;
        } else if (arity == 1) {
                edge.block            = block;