gnu/dist/gcc4/gcc/testsuite/gcc.c-torture/execute/981001-1.c

   1 #define NG   0x100L
   2
   3 unsigned long flg = 0;
   4
   5 long sub (int n)
   6 {
   7   int a, b ;
   8
   9   if (n >= 2)
  10     {
  11       if (n % 2 == 0)
  12         {
  13           a = sub (n / 2);
  14
  15           return (a + 2 * sub (n / 2 - 1)) * a;
  16         }
  17       else
  18         {
  19           a = sub (n / 2 + 1);
  20           b = sub (n / 2);
  21
  22           return a * a + b * b;
  23         }
  24     }
  25   else
  26     return (long) n;
  27 }
  28
  29 int main (void)
  30 {
  31   if (sub (30) != 832040L)
  32     flg |= NG;
  33
  34   if (flg)
  35     abort ();
  36
  37   exit (0);
  38 }