From: hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 23 Oct 2019 20:01:25 +0000 (+0000)
Subject: 	* lto-streamer-out.c (cmp_symbol_files): Watch for overflow.
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aa0ba62796dc179ff622eab0f2fa1976f1ba98c0;p=thirdparty%2Fgcc.git

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



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@277348 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d6c0c9ec6ee0..b975798166ce 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 2c712926f32a..3ecadddec528 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;