gcc/testsuite/gcc.dg/pr88563.c

   1 /* PR rtl-optimization/88563 */
   2 /* { dg-do run { target int128 } } */
   3 /* { dg-options "-O2 -fno-code-hoisting -fno-tree-ccp -fno-tree-dominator-opts -fno-tree-forwprop -fno-tree-fre -fno-tree-pre -fno-tree-vrp" } */
   4
   5 int
   6 main ()
   7 {
   8 #if __SIZEOF_LONG_LONG__ == 8 && __SIZEOF_INT128__ == 16 && __CHAR_BIT__ == 8
   9   unsigned __int128 a = 5;
  10   __builtin_mul_overflow (0xffffffffffffffffULL, (unsigned long long) a, &a);
  11   if (a != ((unsigned __int128)4 << 64 | 0xfffffffffffffffb))
  12     __builtin_abort ();
  13 #endif
  14   return 0;
  15 }