extern tree chrec_fold_plus (tree, tree, tree);
extern tree chrec_fold_minus (tree, tree, tree);
extern tree chrec_fold_multiply (tree, tree, tree);
-extern tree chrec_convert (tree, tree, tree);
-extern tree chrec_convert_rhs (tree, tree, tree);
+extern tree chrec_convert (tree, tree, gimple);
+extern tree chrec_convert_rhs (tree, tree, gimple);
extern tree chrec_convert_aggressive (tree, tree);
/* Operations. */
extern tree hide_evolution_in_other_loops_than_loop (tree, unsigned);
extern tree reset_evolution_in_loop (unsigned, tree, tree);
extern tree chrec_merge (tree, tree);
+extern void for_each_scev_op (tree *, bool (*) (tree *, void *), void *);
/* Observers. */
extern bool eq_evolutions_p (const_tree, const_tree);