+
+extern void cselib_reset_table (unsigned int);
+extern unsigned int cselib_get_next_uid (void);
+extern void cselib_preserve_value (cselib_val *);
+extern bool cselib_preserved_value_p (cselib_val *);
+extern void cselib_preserve_only_values (void);
+extern void cselib_preserve_cfa_base_value (cselib_val *, unsigned int);
+extern void cselib_add_permanent_equiv (cselib_val *, rtx, rtx);
+extern bool cselib_have_permanent_equivalences (void);
+
+extern void dump_cselib_table (FILE *);
+
+/* Return the canonical value for VAL, following the equivalence chain
+ towards the earliest (== lowest uid) equivalent value. */
+
+static inline cselib_val *
+canonical_cselib_val (cselib_val *val)
+{
+ cselib_val *canon;
+
+ if (!val->locs || val->locs->next
+ || !val->locs->loc || GET_CODE (val->locs->loc) != VALUE
+ || val->uid < CSELIB_VAL_PTR (val->locs->loc)->uid)
+ return val;
+
+ canon = CSELIB_VAL_PTR (val->locs->loc);
+ gcc_checking_assert (canonical_cselib_val (canon) == canon);
+ return canon;
+}