1  /* PR tree-optimization/87320 */
       2  /* { dg-do run } */
       3  /* { dg-require-effective-target alloca } */
       4  /* { dg-options "-O3" } */
       5  /* { dg-additional-options "-mavx" { target avx_runtime } } */
       6  
       7  static void __attribute__ ((noinline))
       8  transpose_vector (unsigned long n)
       9  {
      10    unsigned long data[2 * n];
      11    for (unsigned long i = 0; i < 2 * n; i++)
      12      data[i] = 4 * i + 2;
      13  
      14    unsigned long transposed[n];
      15    for (unsigned long i = 0; i < n; i++)
      16      transposed[i] = data[2 * i];
      17  
      18    for (unsigned long i = 0; i < n; i++)
      19      if (transposed[i] != 8 * i + 2)
      20        __builtin_abort ();
      21  }
      22  
      23  int
      24  main ()
      25  {
      26    transpose_vector (4);
      27    transpose_vector (120);
      28    return 0;
      29  }