From: Martin Liska <mliska@suse.cz>
Date: Mon, 18 Jul 2016 12:57:25 +0000 (+0200)
Subject: re PR rtl-optimization/71634 (Invalid write with in mark_loops_for_removal (ira-build... 
X-Git-Tag: releases/gcc-4.9.4~68
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b95f91ba177ab2595dee37b6f64461cfe1a95f70;p=thirdparty%2Fgcc.git

re PR rtl-optimization/71634 (Invalid write with in mark_loops_for_removal (ira-build.c:2256) with --param ira-max-loops-num=0)

Fix PR rtl-optimization/71634

	Backported from mainline
	2016-07-12  Martin Liska  <mliska@suse.cz>

	* ira-build.c (mark_loops_for_removal): Properly iterate
	loops.

From-SVN: r238429
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 683efeb1a2ef..d87ee9b2fad0 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2016-07-18  Martin Liska  <mliska@suse.cz>
+
+	Backported from mainline
+	2016-07-12  Martin Liska  <mliska@suse.cz>
+
+	PR rtl-optimization/71634
+	* ira-build.c (mark_loops_for_removal): Properly iterate
+	loops.
+
 2016-07-08  Martin Liska  <mliska@suse.cz>
 
 	Backported from mainline
diff --git a/gcc/ira-build.c b/gcc/ira-build.c
index 643bbe9a08be..b13a87c58728 100644
--- a/gcc/ira-build.c
+++ b/gcc/ira-build.c
@@ -2277,7 +2277,7 @@ mark_loops_for_removal (void)
 	     );
       }
   qsort (sorted_loops, n, sizeof (ira_loop_tree_node_t), loop_compare_func);
-  for (i = 0; n - i + 1 > IRA_MAX_LOOPS_NUM; i++)
+  for (i = 0; i < n - IRA_MAX_LOOPS_NUM; i++)
     {
       sorted_loops[i]->to_remove_p = true;
       if (internal_flag_ira_verbose > 1 && ira_dump_file != NULL)