From: Jan Hubicka <hubicka@ucw.cz>
Date: Wed, 23 Oct 2019 20:01:25 +0000 (+0200)
Subject: lto-streamer-out.c (cmp_symbol_files): Watch for overflow.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=7c1bc95a48ba184da800007a5eb123f8ca81c509;p=gcc.git

lto-streamer-out.c (cmp_symbol_files): Watch for overflow.


	* lto-streamer-out.c (cmp_symbol_files): Watch for overflow.

From-SVN: r277348
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d6c0c9ec6ee..b975798166c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2019-10-23  Jan Hubicka  <hubicka@ucw.cz>
+
+	* lto-streamer-out.c (cmp_symbol_files): Watch for overflow.
+
 2019-10-23  Jan Hubicka  <hubicka@ucw.cz>
 
 	* ipa-reference.c (varpool_removal_hook, ipa_reference_c_finalize): Fix
diff --git a/gcc/lto-streamer-out.c b/gcc/lto-streamer-out.c
index 2c712926f32..3ecadddec52 100644
--- a/gcc/lto-streamer-out.c
+++ b/gcc/lto-streamer-out.c
@@ -2447,7 +2447,12 @@ cmp_symbol_files (const void *pn1, const void *pn2)
 
   /* Order within static library.  */
   if (n1->lto_file_data && n1->lto_file_data->id != n2->lto_file_data->id)
-    return n1->lto_file_data->id - n2->lto_file_data->id;
+    {
+      if (n1->lto_file_data->id > n2->lto_file_data->id)
+	return 1;
+      if (n1->lto_file_data->id < n2->lto_file_data->id)
+	return -1;
+    }
 
   /* And finaly order by the definition order.  */
   return n1->order - n2->order;