static inline tree get_subvar_at (tree, unsigned HOST_WIDE_INT);
static inline bool ref_contains_array_ref (tree);
static inline bool array_ref_contains_indirect_ref (tree);
-extern tree okay_component_ref_for_subvars (tree, unsigned HOST_WIDE_INT *,
- unsigned HOST_WIDE_INT *);
+extern tree get_ref_base_and_extent (tree, HOST_WIDE_INT *,
+ HOST_WIDE_INT *, HOST_WIDE_INT *);
static inline bool var_can_have_subvars (tree);
static inline bool overlap_subvar (unsigned HOST_WIDE_INT,
unsigned HOST_WIDE_INT,