From 496d3346cfeeb96c46d299dc55a86082f544824f Mon Sep 17 00:00:00 2001
From: Richard Biener <rguenther@suse.de>
Date: Wed, 29 Oct 2014 09:22:55 +0000
Subject: [PATCH] re PR tree-optimization/63666 (FAIL: gcc.dg/vect/pr45752.c
(internal compiler error))
2014-10-29 Richard Biener <rguenther@suse.de>
PR tree-optimization/63666
* tree-vect-slp.c (vect_get_mask_element): Properly handle
accessing out-of-bound elements.
From-SVN: r216825
---
gcc/ChangeLog | 6 ++++++
gcc/tree-vect-slp.c | 3 ++-
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 514cdd549900..89665cfacd50 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2014-10-29 Richard Biener <rguenther@suse.de>
+
+ PR tree-optimization/63666
+ * tree-vect-slp.c (vect_get_mask_element): Properly handle
+ accessing out-of-bound elements.
+
2014-10-29 Alexander Ivchenko <alexander.ivchenko@intel.com>
Maxim Kuznetsov <maxim.kuznetsov@intel.com>
Anna Tikhonova <anna.tikhonova@intel.com>
diff --git a/gcc/tree-vect-slp.c b/gcc/tree-vect-slp.c
index 90f5ef4b8da0..84bec9544fec 100644
--- a/gcc/tree-vect-slp.c
+++ b/gcc/tree-vect-slp.c
@@ -2890,7 +2890,7 @@ vect_get_mask_element (gimple stmt, int first_mask_element, int m,
}
/* The mask requires the next vector. */
- if (*current_mask_element >= mask_nunits * 2)
+ while (*current_mask_element >= mask_nunits * 2)
{
if (*needs_first_vector || *mask_fixed)
{
@@ -3041,6 +3041,7 @@ vect_transform_slp_perm_load (slp_tree node, vec<tree> dr_chain,
&number_of_mask_fixes, &mask_fixed,
&needs_first_vector))
return false;
+ gcc_assert (current_mask_element < 2 * nunits);
mask[index++] = current_mask_element;
if (index == nunits)
--
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