re PR target/85401 (segfault building code for VAX)

	PR target/85401
	* ira-color.c (allocno_copy_cost_saving): Call
	ira_init_register_move_cost_if_necessary.

From-SVN: r276426

gcc/ChangeLog

+2019-10-01  Maya Rashish  <coypu@sdf.org>
+
+	PR target/85401
+	* ira-color.c (allocno_copy_cost_saving): Call
+	ira_init_register_move_cost_if_necessary.
+
 2019-10-01  Maciej W. Rozycki  <macro@wdc.com>
 
 	* Makefile.in (gnat_install_lib): New variable.

gcc/ira-color.c

@@ -2817,6 +2817,7 @@ allocno_copy_cost_saving (ira_allocno_t allocno, int hard_regno)
 	}
       else
 	gcc_unreachable ();
+      ira_init_register_move_cost_if_necessary (allocno_mode);
       cost += cp->freq * ira_register_move_cost[allocno_mode][rclass][rclass];
     }
   return cost;