1  /* Test C2X support for empty initializers: valid use cases with GNU
       2     extensions.  */
       3  /* { dg-do run } */
       4  /* { dg-options "-std=gnu2x" } */
       5  
       6  extern void exit (int);
       7  extern void abort (void);
       8  
       9  void
      10  f (int a)
      11  {
      12    struct s { volatile int x[a]; };
      13    struct s b = {};
      14    for (int i = 0; i < a; i++)
      15      if (b.x[i] != 0)
      16        abort ();
      17    /* Overwrite contents of b.x before second call to make it more likely stack
      18       contents are nonzero if proper initialization did not occur.  */
      19    for (int i = 0; i < a; i++)
      20      b.x[i] = -1;
      21  }
      22  
      23  int
      24  main (void)
      25  {
      26    f (100);
      27    f (100);
      28    exit (0);
      29  }