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 abort (void);
   4
   5 void
   6 foo (unsigned long *start, unsigned long *end)
   7 {
   8   unsigned long *temp = end - 1;
   9
  10   while (end > start)
  11     *end-- = *temp--;
  12 }
  13
  14 int
  15 main (void)
  16 {
  17   unsigned long a[5];
  18   int start, end, k;
  19
  20   for (start = 0; start < 5; start++)
  21     for (end = 0; end < 5; end++)
  22       {
  23         for (k = 0; k < 5; k++)
  24           a[k] = k;
  25
  26         foo (a + start, a + end);
  27
  28         for (k = 0; k <= start; k++)
  29           if (a[k] != k)
  30             abort ();
  31
  32         for (k = start + 1; k <= end; k++)
  33           if (a[k] != k - 1)
  34             abort ();
  35
  36         for (k = end + 1; k < 5; k++)
  37           if (a[k] != k)
  38             abort ();
  39       }
  40
  41   return 0;
  42 }