gcc/testsuite/gcc.c-torture/execute/loop-2e.c

   1 void abort (void);
   2
   3 void f (int *p, int **q)
   4 {
   5   int i;
   6   for (i = 0; i < 40; i++)
   7     {
   8       *q++ = &p[i];
   9     }
  10 }
  11
  12 int main ()
  13 {
  14   void *p;
  15   int *q[40];
  16   __SIZE_TYPE__ start;
  17
  18   /* Find the signed middle of the address space.  */
  19   if (sizeof(start) == sizeof(int))
  20     start = (__SIZE_TYPE__) __INT_MAX__;
  21   else if (sizeof(start) == sizeof(long))
  22     start = (__SIZE_TYPE__) __LONG_MAX__;
  23   else if (sizeof(start) == sizeof(long long))
  24     start = (__SIZE_TYPE__) __LONG_LONG_MAX__;
  25   else
  26     return 0;
  27
  28   /* Arbitrarily align the pointer.  */
  29   start &= -32;
  30
  31   /* Pretend that's good enough to start address arithmetic.  */
  32   p = (void *)start;
  33
  34   /* Verify that GIV replacement computes the correct results.  */
  35   q[39] = 0;
  36   f (p, q);
  37   if (q[39] != (int *)p + 39)
  38     abort ();
  39
  40   return 0;
  41 }