forbid to set current_block to Bad

This was used as a hack to mark unreachable code by some people, but it
is prefered to simply use a new Block without predecessors, or set NULL
if you have to.

diff --git a/ir/ir/ircons.c b/ir/ir/ircons.c
index 29683a4..91577ab 100644 (file)
--- a/ir/ir/ircons.c
+++ b/ir/ir/ircons.c
@@ -528,8 +528,8 @@ void set_cur_block(ir_node *target)
 void set_r_cur_block(ir_graph *irg, ir_node *target)
 {
        assert(get_irg_phase_state(irg) == phase_building);
-       assert(target == NULL || get_irn_mode(target) == mode_BB);
-       assert(target == NULL || get_irn_irg(target)  == irg);
+       assert(target == NULL || is_Block(target));
+       assert(target == NULL || get_irn_irg(target) == irg);
        irg->current_block = target;
 }