-/**
- * Checks if a node is optimizable, viz. has something to do with coalescing
- * @param arch The architecture environment
- * @param irn The irn to check
- */
-int co_is_optimizable_root(const copy_opt_t *co, ir_node *irn);
-
-/**
- * Checks if the irn is a non-interfering argument of a node which 'is_optimizable'
- */
-int co_is_optimizable_arg(const copy_opt_t *co, ir_node *irn);
-