void tree_unroll_loops_completely (struct loops *);
void tree_ssa_iv_optimize (struct loops *);
-void number_of_iterations_cond (tree, tree, tree, enum tree_code, tree, tree,
- struct tree_niter_desc *);
bool number_of_iterations_exit (struct loop *, edge,
struct tree_niter_desc *niter);
tree find_loop_niter (struct loop *, edge *);