Do not call chkp_type_bounds_count if MPX is not enabled (PR target/84988).

2018-03-28  Martin Liska  <mliska@suse.cz>

	PR target/84988
	* config/i386/i386.c (ix86_function_arg_advance): Do not call
	chkp_type_bounds_count if MPX is not enabled.

From-SVN: r258923

gcc/ChangeLog

+2018-03-28  Martin Liska  <mliska@suse.cz>
+
+	PR target/84988
+	* config/i386/i386.c (ix86_function_arg_advance): Do not call
+	chkp_type_bounds_count if MPX is not enabled.
+
 2018-03-27  Chung-Ju Wu  <jasonwucj@gmail.com>
 
 	* config/nds32/nds32.h (BRANCH_COST): Adjust cost.

gcc/config/i386/i386.c

@@ -8618,7 +8618,8 @@ ix86_function_arg_advance (cumulative_args_t cum_v, machine_mode mode,
       if (cum->caller)
 	cfun->machine->outgoing_args_on_stack = true;
 
-      cum->bnds_in_bt = chkp_type_bounds_count (type);
+      if (flag_check_pointer_bounds)
+	cum->bnds_in_bt = chkp_type_bounds_count (type);
     }
 }