remove_tuples: add missing confirm_irg_properties() call

ir/ir/rm_tuples.c

@@ -22,6 +22,7 @@
  */
 static void exchange_tuple_projs(ir_node *node, void *env)
 {
+	bool *changed = (bool*)env;
 	if (!is_Proj(node))
 		return;
 
@@ -35,19 +36,27 @@ static void exchange_tuple_projs(ir_node *node, void *env)
 	int      pn         = get_Proj_proj(node);
 	ir_node *tuple_pred = get_Tuple_pred(pred, pn);
 	exchange(node, tuple_pred);
+	*changed = true;
 }
 
 void remove_tuples(ir_graph *irg)
 {
-	irg_walk_graph(irg, exchange_tuple_projs, NULL, NULL);
+	bool changed = false;
+	irg_walk_graph(irg, exchange_tuple_projs, NULL, &changed);
 
 	/* remove Tuples only held by keep-alive edges */
 	ir_node *end = get_irg_end(irg);
 	for (int i = get_End_n_keepalives(end); i-- > 0; ) {
 		ir_node *irn = get_End_keepalive(end, i);
-		if (is_Tuple(irn))
+		if (is_Tuple(irn)) {
 			remove_End_n(end, i);
+			changed = true;
+		}
 	}
 
+	confirm_irg_properties(irg, changed
+			? IR_GRAPH_PROPERTIES_CONTROL_FLOW | IR_GRAPH_PROPERTY_ONE_RETURN
+			  | IR_GRAPH_PROPERTY_MANY_RETURNS | IR_GRAPH_PROPERTY_NO_BADS
+			: IR_GRAPH_PROPERTIES_ALL);
 	add_irg_properties(irg, IR_GRAPH_PROPERTY_NO_TUPLES);
 }