int estimate_num_insns (tree expr, eni_weights *);
bool tree_versionable_function_p (tree);
void tree_function_versioning (tree, tree, varray_type, bool);
+bool tree_can_inline_p (tree, tree);
extern tree remap_decl (tree decl, copy_body_data *id);
extern tree remap_type (tree type, copy_body_data *id);