gcc/testsuite/gcc.dg/torture/pr28045.c

   1 /* { dg-do run } */
   2
   3 extern void abort(void);
   4 struct a
   5 {
   6    unsigned int bits : 1;
   7    signed long val : ((sizeof(long) * 8) - 1);
   8 };
   9 int Fnegate (struct a b)
  10 {
  11   if ((-((long)b.val)) <= ((long) ((1UL << ((sizeof(long) * 8) - 2)) -1UL))
  12       && (-((long)b.val)) >= (-(((long) ((1UL << ((sizeof(long) * 8) - 2)) -1UL))) - 1))
  13      return 0 ;
  14   abort ();
  15 }
  16 int main ()
  17 {
  18   struct a b = {1, 1};
  19   Fnegate (b);
  20   return 0;
  21 }
  22