From 6c620b0744af235ceb1c07c214772895e0f73c15 Mon Sep 17 00:00:00 2001
From: Jakub Jelinek <jakub@redhat.com>
Date: Wed, 5 Dec 2018 00:27:39 +0100
Subject: [PATCH] re PR tree-optimization/87320 (Last iteration of vectorized
 loop not executed when peeling for gaps)

	PR tree-optimization/87320
	* gcc.dg/pr87320.c: New test.

From-SVN: r266805
---
 gcc/testsuite/ChangeLog        |  5 +++++
 gcc/testsuite/gcc.dg/pr87320.c | 28 ++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+)
 create mode 100644 gcc/testsuite/gcc.dg/pr87320.c

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 7aad09dae78..c1b1bc49e39 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-12-04  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/87320
+	* gcc.dg/pr87320.c: New test.
+
 2018-12-04  Jeff Law  <law@redhat.com>
 
 	* gcc.dg/strlenopt-58.c: Handle targets with 2 byte wchar_t.
diff --git a/gcc/testsuite/gcc.dg/pr87320.c b/gcc/testsuite/gcc.dg/pr87320.c
new file mode 100644
index 00000000000..38ece590aab
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr87320.c
@@ -0,0 +1,28 @@
+/* PR tree-optimization/87320 */
+/* { dg-do run } */
+/* { dg-options "-O3" } */
+/* { dg-additional-options "-mavx" { target avx_runtime } } */
+
+static void __attribute__ ((noinline))
+transpose_vector (unsigned long n)
+{
+  unsigned long data[2 * n];
+  for (unsigned long i = 0; i < 2 * n; i++)
+    data[i] = 4 * i + 2;
+
+  unsigned long transposed[n];
+  for (unsigned long i = 0; i < n; i++)
+    transposed[i] = data[2 * i];
+
+  for (unsigned long i = 0; i < n; i++)
+    if (transposed[i] != 8 * i + 2)
+      __builtin_abort ();
+}
+
+int
+main ()
+{
+  transpose_vector (4);
+  transpose_vector (120);
+  return 0;
+}
-- 
2.30.2