+extern struct ptr_info_def *get_ptr_info (tree);
+static inline subvar_t get_subvars_for_var (tree);
+static inline bool ref_contains_array_ref (tree);
+extern tree okay_component_ref_for_subvars (tree, HOST_WIDE_INT *,
+ HOST_WIDE_INT *);
+static inline bool var_can_have_subvars (tree);
+static inline bool overlap_subvar (HOST_WIDE_INT, HOST_WIDE_INT,
+ subvar_t, bool *);