1  /* Test LOOP recognition */
       2  
       3  /* { dg-do run } */
       4  /* { dg-options "-O1 -mloop" } */
       5  
       6  /* -O1 in the options is significant.  Without it do-loop will not be
       7     run.  */
       8  
       9  extern void abort (void);
      10  
      11  volatile unsigned int int_12345 = 12345;
      12  volatile unsigned int int_0 = 0;
      13  volatile unsigned int int_1 = 1;
      14  
      15  unsigned int
      16  test_loop (unsigned int n)
      17  {
      18    unsigned int i;
      19    volatile unsigned int s = 0;
      20  
      21    if (n >= 0x10000) return 0;
      22  
      23    for (i = 0; i < n; i++)
      24      s++;
      25    return s;
      26  }
      27  
      28  
      29  int
      30  main (int argc, char** argv)
      31  {
      32    if (test_loop (int_0) != 0)
      33      abort();
      34    if (test_loop (int_1) != 1)
      35      abort();
      36    if (test_loop (int_12345) != 12345)
      37      abort();
      38  
      39    return 0;
      40  }
      41