-/*
-Returns the pos`th loop element.
-This may be a loop_node or a ir_node. The caller of this function has
-to check the *(loop_element.kind) field for "k_ir_node" or "k_ir_loop"
-and then select the appropriate "loop_element.node" or "loop_element.son".
-*/
-loop_element get_loop_element(const ir_loop *loop, int pos)