Fix bootstrap on ia64 with old GCC version.

2018-07-04  Martin Liska  <mliska@suse.cz>

	* tree-switch-conversion.c: Define
        max_ratio_for_speed and max_ratio_for_size constants.

From-SVN: r262376

gcc/ChangeLog

+2018-07-04  Martin Liska  <mliska@suse.cz>
+
+	* tree-switch-conversion.c: Define
+        max_ratio_for_speed and max_ratio_for_size constants.
+
 2018-07-04  Denys Vlasenko  <dvlasenk@redhat.com>
 	    Martin Liska  <mliska@suse.cz>
 

gcc/tree-switch-conversion.c

@@ -1212,6 +1212,11 @@ jump_table_cluster::is_beneficial (const vec<cluster *> &,
   return end - start + 1 >= case_values_threshold ();
 }
 
+/* Definition of jump_table_cluster constants.  */
+
+const unsigned HOST_WIDE_INT jump_table_cluster::max_ratio_for_size;
+const unsigned HOST_WIDE_INT jump_table_cluster::max_ratio_for_speed;
+
 /* Find bit tests of given CLUSTERS, where all members of the vector
    are of type simple_cluster.  New clusters are returned.  */