1  /* { dg-do run } */
       2  /* { dg-options "-O3" } */
       3  
       4  /* Check that "m" array references are effective in preventing the
       5     array initialization from wandering past a use in the asm, and
       6     that the casts remain supported.  */
       7  
       8  static int
       9  f1 (const char *p)
      10  {
      11    int count;
      12  
      13    __asm__ ("repne scasb"
      14  	   : "=c" (count), "+D" (p)
      15  	   : "m" (*(const char (*)[]) p), "0" (-1), "a" (0));
      16    return -2 - count;
      17  }
      18  
      19  static int
      20  f2 (const char *p)
      21  {
      22    int count;
      23  
      24    __asm__ ("repne scasb"
      25  	   : "=c" (count), "+D" (p)
      26  	   : "m" (*(const char (*)[48]) p), "0" (-1), "a" (0));
      27    return -2 - count;
      28  }
      29  
      30  static int
      31  f3 (int n, const char *p)
      32  {
      33    int count;
      34  
      35    __asm__ ("repne scasb"
      36  	   : "=c" (count), "+D" (p)
      37  	   : "m" (*(const char (*)[n]) p), "0" (-1), "a" (0));
      38    return -2 - count;
      39  }
      40  
      41  int
      42  main ()
      43  {
      44    int a;
      45    char buff[48] = "hello world";
      46    buff[4] = 0;
      47    a = f1 (buff);
      48    if (a != 4)
      49      __builtin_abort ();
      50    buff[4] = 'o';
      51    a = f2 (buff);
      52    if (a != 11)
      53      __builtin_abort ();
      54    buff[4] = 0;
      55    a = f3 (48, buff);
      56    if (a != 4)
      57      __builtin_abort ();
      58    return 0;
      59  }