bool need_ssa_update_p (struct function *);
bool name_registered_for_update_p (tree);
void release_ssa_name_after_update_ssa (tree);
-void compute_global_livein (bitmap, bitmap);
void mark_virtual_operands_for_renaming (struct function *);
tree get_current_def (tree);
void set_current_def (tree, tree);