--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/vect/vect-nb-iter-ub-2.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,32 @@
+/* { dg-additional-options "-fdump-tree-cunroll-details" } */
+
+#include "tree-vect.h"
+
+int ii[32];
+char cc[66] __attribute__((aligned(1))) =
+  { 0, 0, 1, 0, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 8, 0, 9, 0,
+    10, 0, 11, 0, 12, 0, 13, 0, 14, 0, 15, 0, 16, 0, 17, 0, 18, 0, 19, 0,
+    20, 0, 21, 0, 22, 0, 23, 0, 24, 0, 25, 0, 26, 0, 27, 0, 28, 0, 29, 0,
+    30, 0, 31, 0 };
+
+void __attribute__((noinline,noclone))
+foo (int s)
+{
+  int i;
+   for (i = 0; i < s; i++)
+     ii[i] = (int) cc[i*2];
+}
+
+int main (int argc, const char **argv)
+{
+  int i;
+  check_vect ();
+  foo (32);
+  for (i = 0; i < 32; i++)
+    if (ii[i] != i)
+      __builtin_abort ();
+}
+
+/* { dg-final { scan-tree-dump "vectorized 1 loops" "vect" { target { i?86-*-* x86_64-*-* } } } } */
+/* { dg-final { scan-tree-dump "loop turned into non-loop; it never loops" "cunroll" { target { i?86-*-* x86_64-*-* } } } } */
+/* { dg-final { scan-tree-dump-not "loop with 2 iterations completely unrolled" "cunroll" { target { i?86-*-* x86_64-*-* } } } } */