From: Jakub Jelinek <jakub@redhat.com>
Date: Mon, 30 Jun 2014 07:33:41 +0000 (+0200)
Subject: ira-build.c (sort_conflict_id_map): Don't call qsort if num is 0, as ira_object_id_ma... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=85c00e0b91c40959852cbd7a0cacc85f2663ceee;p=gcc.git

ira-build.c (sort_conflict_id_map): Don't call qsort if num is 0, as ira_object_id_map might be NULL, or 1.

	* ira-build.c (sort_conflict_id_map): Don't call
	qsort if num is 0, as ira_object_id_map might be NULL, or 1.

From-SVN: r212136
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 4cc167ab98a..a316102edcb 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2014-06-30  Jakub Jelinek  <jakub@redhat.com>
+
+	* ira-build.c (sort_conflict_id_map): Don't call
+	qsort if num is 0, as ira_object_id_map might be NULL, or 1.
+
 2014-06-30  Zhenqiang Chen  <zhenqiang.chen@linaro.org>
 
 	* loop-invariant.c (get_inv_cost): Handle register class.
diff --git a/gcc/ira-build.c b/gcc/ira-build.c
index 000c25c83a7..ee20c09fcb6 100644
--- a/gcc/ira-build.c
+++ b/gcc/ira-build.c
@@ -2821,8 +2821,9 @@ sort_conflict_id_map (void)
       FOR_EACH_ALLOCNO_OBJECT (a, obj, oi)
 	ira_object_id_map[num++] = obj;
     }
-  qsort (ira_object_id_map, num, sizeof (ira_object_t),
-	 object_range_compare_func);
+  if (num > 1)
+    qsort (ira_object_id_map, num, sizeof (ira_object_t),
+	   object_range_compare_func);
   for (i = 0; i < num; i++)
     {
       ira_object_t obj = ira_object_id_map[i];