PR82396 workaround

r253236 broke AArch64 bootstrap.  This is a temporary workaround that
disables qsort checking in the scheduler to enable continued development
and testing on AArch64.  This will be removed once the autopref scheduling
code has been fixed.

    gcc/
	PR rtl-optimization/82396
	* haifa-sched.c (ready_sort_real): Disable qsort checking.

From-SVN: r253487

gcc/ChangeLog

+2017-10-06  Wilco Dijkstra  <wdijkstr@arm.com>
+
+	PR rtl-optimization/82396
+	* haifa-sched.c (ready_sort_real): Disable qsort checking.
+
 2017-10-06  Sebastian Pop  <sebpop@gmail.com>
 
 	* graphite-dependences.c (scop_get_reads): Move code to...

gcc/haifa-sched.c

@@ -3084,7 +3084,8 @@ ready_sort_real (struct ready_list *ready)
   if (n_ready_real == 2)
     swap_sort (first, n_ready_real);
   else if (n_ready_real > 2)
-    qsort (first, n_ready_real, sizeof (rtx), rank_for_schedule);
+    /* HACK: Disable qsort checking for now (PR82396).  */
+    (qsort) (first, n_ready_real, sizeof (rtx), rank_for_schedule);
 
   if (sched_verbose >= 4)
     {