BugFix: Always invalidate loop-info if data flow was changed.

ir/lower/lower_copyb.c

@@ -182,6 +182,7 @@ void lower_CopyB(ir_graph *irg, unsigned max_size, unsigned native_mode_bytes)
 
 	if (changed) {
 		set_irg_outs_inconsistent(irg);
+		set_irg_loopinfo_inconsistent(irg);
 	}
 
 	obstack_free(&env.obst, NULL);