re PR rtl-optimization/71634 (Invalid write with in mark_loops_for_removal (ira-build...

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: r238430

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 3e640861e53704e6895f0636356dca29e150aa57..971b92ef500d1f4a383fe499b587cc12aa7d82a8 100644 (file)
--- 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.
+
 2016-07-12  Segher Boessenkool  <segher@kernel.crashing.org>
 
        Backport from mainline

diff --git a/gcc/ira-build.c b/gcc/ira-build.c
index 189f340800aacf29b031e784d44816f1fa841d39..c278da428159753ace6eb4f932dadee4d6e1c981 100644 (file)
--- a/gcc/ira-build.c
+++ b/gcc/ira-build.c
@@ -2291,7 +2291,7 @@ 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)