gcc/testsuite/gcc.dg/torture/pr78546-2.c

   1 /* PR rtl-optimization/78546 */
   2 /* { dg-do run { target int128 } } */
   3
   4 typedef unsigned __int128 u128;
   5 u128 b;
   6
   7 int
   8 main ()
   9 {
  10   asm volatile ("" : : : "memory");
  11   u128 x = ((u128) ~0x7fffffffffffffffLL) - b;
  12   u128 y = 1 - x;
  13   if (y != 0x8000000000000001ULL)
  14     __builtin_abort ();
  15   return 0;
  16 }