--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/vect/slp-3.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,146 @@
+/* { dg-require-effective-target vect_int } */
+
+#include <stdarg.h>
+#include "tree-vect.h"
+
+#define N 12
+
+unsigned short in[N*8] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31};
+
+int
+main1 ()
+{
+  int i;
+  unsigned short out[N*8];
+
+  for (i = 0; i < N; i++)
+    {
+      out[i*8] = in[i*8];
+      out[i*8 + 1] = in[i*8 + 1];
+      out[i*8 + 2] = in[i*8 + 2];
+      out[i*8 + 3] = in[i*8 + 3];
+      out[i*8 + 4] = in[i*8 + 4];
+      out[i*8 + 5] = in[i*8 + 5];
+      out[i*8 + 6] = in[i*8 + 6];
+      out[i*8 + 7] = in[i*8 + 7];
+    }
+
+  /* check results:  */
+  for (i = 0; i < N; i++)
+    {
+      if (out[i*8] !=  in[i*8]
+         || out[i*8 + 1] != in[i*8 + 1]
+         || out[i*8 + 2] != in[i*8 + 2]
+         || out[i*8 + 3] != in[i*8 + 3]
+         || out[i*8 + 4] != in[i*8 + 4]
+         || out[i*8 + 5] != in[i*8 + 5]
+         || out[i*8 + 6] != in[i*8 + 6]
+         || out[i*8 + 7] != in[i*8 + 7])
+	abort ();
+    }
+
+  for (i = 0; i < N*2; i++)
+    {
+      out[i*4] = in[i*4];
+      out[i*4 + 1] = in[i*4 + 1];
+      out[i*4 + 2] = in[i*4 + 2];
+      out[i*4 + 3] = in[i*4 + 3];
+    }
+
+  /* check results:  */
+  for (i = 0; i < N*2; i++)
+    {
+      if (out[i*4] !=  in[i*4]
+         || out[i*4 + 1] != in[i*4 + 1]
+         || out[i*4 + 2] != in[i*4 + 2]
+         || out[i*4 + 3] != in[i*4 + 3])
+        abort ();
+    }
+
+  for (i = 0; i < N/2; i++)
+    {
+      out[i*16] = in[i*16];
+      out[i*16 + 1] = in[i*16 + 1];
+      out[i*16 + 2] = in[i*16 + 2];
+      out[i*16 + 3] = in[i*16 + 3];
+      out[i*16 + 4] = in[i*16 + 4];
+      out[i*16 + 5] = in[i*16 + 5];
+      out[i*16 + 6] = in[i*16 + 6];
+      out[i*16 + 7] = in[i*16 + 7];
+      out[i*16 + 8] = in[i*16 + 8];
+      out[i*16 + 9] = in[i*16 + 9];
+      out[i*16 + 10] = in[i*16 + 10];
+      out[i*16 + 11] = in[i*16 + 11];
+      out[i*16 + 12] = in[i*16 + 12];
+      out[i*16 + 13] = in[i*16 + 13];
+      out[i*16 + 14] = in[i*16 + 14];
+      out[i*16 + 15] = in[i*16 + 15];
+    }
+
+  /* check results:  */
+  for (i = 0; i < N/2; i++)
+    {
+      if (out[i*16] !=  in[i*16]
+         || out[i*16 + 1] != in[i*16 + 1]
+         || out[i*16 + 2] != in[i*16 + 2]
+         || out[i*16 + 3] != in[i*16 + 3]
+         || out[i*16 + 4] != in[i*16 + 4]
+         || out[i*16 + 5] != in[i*16 + 5]
+         || out[i*16 + 6] != in[i*16 + 6]
+         || out[i*16 + 7] != in[i*16 + 7]
+         || out[i*16 + 8] != in[i*16 + 8]
+         || out[i*16 + 9] != in[i*16 + 9]
+         || out[i*16 + 10] != in[i*16 + 10]
+         || out[i*16 + 11] != in[i*16 + 11]
+         || out[i*16 + 12] != in[i*16 + 12]
+         || out[i*16 + 13] != in[i*16 + 13]
+         || out[i*16 + 14] != in[i*16 + 14]
+         || out[i*16 + 15] != in[i*16 + 15])
+        abort ();
+    }
+
+  /* SLP with unrolling by 8.  */
+  for (i = 0; i < N/4; i++)
+    {
+      out[i*9] = in[i*9];
+      out[i*9 + 1] = in[i*9 + 1];
+      out[i*9 + 2] = in[i*9 + 2];
+      out[i*9 + 3] = in[i*9 + 3];
+      out[i*9 + 4] = in[i*9 + 4];
+      out[i*9 + 5] = in[i*9 + 5];
+      out[i*9 + 6] = in[i*9 + 6];
+      out[i*9 + 7] = in[i*9 + 7];
+      out[i*9 + 8] = in[i*9 + 8];
+    }
+
+  /* check results:  */
+  for (i = 0; i < N/4; i++)
+    {
+      if (out[i*9] !=  in[i*9]
+         || out[i*9 + 1] != in[i*9 + 1]
+         || out[i*9 + 2] != in[i*9 + 2]
+         || out[i*9 + 3] != in[i*9 + 3]
+         || out[i*9 + 4] != in[i*9 + 4]
+         || out[i*9 + 5] != in[i*9 + 5]
+         || out[i*9 + 6] != in[i*9 + 6]
+         || out[i*9 + 7] != in[i*9 + 7]
+         || out[i*9 + 8] != in[i*9 + 8])
+        abort ();
+    }
+
+
+  return 0;
+}
+
+int main (void)
+{
+  check_vect ();
+
+  main1 ();
+
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-times "vectorized 3 loops" 1 "vect" } } */
+/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 3 "vect" } } */
+