Backport r255818

2018-03-07  Martin Liska  <mliska@suse.cz>

	Backport from mainline
	2017-12-19  Martin Liska  <mliska@suse.cz>

	PR rtl-optimization/82675
	* loop-unroll.c (unroll_loop_constant_iterations): Allocate one
	more element in sbitmap.

From-SVN: r258327

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ea0a7dcd912e662de48be494eac81ccc4f6168d2..010614b14ef0b04533dee22a7ca14494bf3dfc8b 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2018-03-07  Martin Liska  <mliska@suse.cz>
+
+       Backport from mainline
+       2017-12-19  Martin Liska  <mliska@suse.cz>
+
+       PR rtl-optimization/82675
+       * loop-unroll.c (unroll_loop_constant_iterations): Allocate one
+       more element in sbitmap.
+
 2018-03-07  Martin Liska  <mliska@suse.cz>
 
        Backport from mainline

diff --git a/gcc/loop-unroll.c b/gcc/loop-unroll.c
index 4d26e2f7cd1a19131b2443c30a37c1f8ec68509b..c68cbc54892f550fddad0cf41bda2b2158c76a77 100644 (file)
--- a/gcc/loop-unroll.c
+++ b/gcc/loop-unroll.c
@@ -477,7 +477,7 @@ unroll_loop_constant_iterations (struct loop *loop)
 
   exit_mod = niter % (max_unroll + 1);
 
-  wont_exit = sbitmap_alloc (max_unroll + 1);
+  wont_exit = sbitmap_alloc (max_unroll + 2);
   bitmap_ones (wont_exit);
 
   auto_vec<edge> remove_edges;