gcc/testsuite/gcc.c-torture/execute/loop-15.c

   1 /* Bombed with a segfault on powerpc-linux.  doloop.c generated wrong
   2    loop count.  */
   3 void
   4 foo (unsigned long *start, unsigned long *end)
   5 {
   6   unsigned long *temp = end - 1;
   7
   8   while (end > start)
   9     *end-- = *temp--;
  10 }
  11
  12 int
  13 main (void)
  14 {
  15   unsigned long a[5];
  16   int start, end, k;
  17
  18   for (start = 0; start < 5; start++)
  19     for (end = 0; end < 5; end++)
  20       {
  21         for (k = 0; k < 5; k++)
  22           a[k] = k;
  23
  24         foo (a + start, a + end);
  25
  26         for (k = 0; k <= start; k++)
  27           if (a[k] != k)
  28             abort ();
  29
  30         for (k = start + 1; k <= end; k++)
  31           if (a[k] != k - 1)
  32             abort ();
  33
  34         for (k = end + 1; k < 5; k++)
  35           if (a[k] != k)
  36             abort ();
  37       }
  38
  39   return 0;
  40 }