1 files changed, 50 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/vect/vect-35-big-array.c b/gcc/testsuite/gcc.dg/vect/vect-35-big-array.c
new file mode 100644
index 00000000000..73b18cf62d8
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/vect-35-big-array.c
@@ -0,0 +1,50 @@
+/* { dg-require-effective-target vect_int } */
+
+#include <stdarg.h>
+#include "tree-vect.h"
+
+#define N 128
+
+__attribute__ ((noinline))
+int main1 ()
+{
+  union {
+    unsigned char a[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
+    unsigned char b[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
+  } s;
+  int i;
+
+  /* Initialization.  */
+  for (i = 0; i < N; i++)
+    {
+      s.b[i] = i;
+    }
+
+  /* Dependence analysis fails cause s.a and s.b may overlap.
+     Use runtime aliasing test with versioning.  */
+  for (i = 0; i < N; i++)
+    {
+      s.a[i] = s.b[i] + 1;
+    }
+
+  /* check results:  */
+  for (i = 0; i < N; i++)
+    {
+      if (s.a[i] != i + 1)
+	abort ();
+    }
+
+  return 0;
+}
+
+int main (void)
+{
+  check_vect ();
+
+  return main1 ();
+}
+
+
+/* { dg-final { scan-tree-dump-times "vectorized 2 loops" 1 "vect"  { xfail { ia64-*-* sparc*-*-* } } } } */
+/* { dg-final { scan-tree-dump-times "can't determine dependence between" 1 "vect" } } */
+/* { dg-final { cleanup-tree-dump "vect" } } */