gcc/testsuite/gcc.dg/pr87320.c

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