/** Returns non-zero if the predecessor pos is a backedge. */
FIRM_API int is_backedge(const ir_node *n, int pos);
/** Marks edge pos as a backedge. */
/** Returns non-zero if the predecessor pos is a backedge. */
FIRM_API int is_backedge(const ir_node *n, int pos);
/** Marks edge pos as a backedge. */