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 char char_123 = 123;
      12  volatile unsigned char char_0 = 0;
      13  volatile unsigned char char_1 = 1;
      14  
      15  unsigned int
      16  test_loop_char (unsigned char n)
      17  {
      18    unsigned char i;
      19    volatile unsigned int s = 0;
      20  
      21    for (i = 0; i < n; i++)
      22      s++;
      23    return s;
      24  }
      25  
      26  int
      27  main (int argc, char** argv)
      28  {
      29    if (test_loop_char (char_0) != 0)
      30      abort();
      31    if (test_loop_char (char_1) != 1)
      32      abort();
      33    if (test_loop_char (char_123) != 123)
      34      abort();
      35  
      36    return 0;
      37  }
      38