+
−/* PR tree-optimization/68835 */
+
−/* { dg-do run { target int128 } } */
+
−/* { dg-options "-O2" } */
+
−
+
−__attribute__((noinline, noclone)) unsigned __int128
+
−foo (void)
+
−{
+
−  unsigned __int128 x = (unsigned __int128) 0xffffffffffffffffULL;
+
−  struct { unsigned __int128 a : 65; } w;
+
−  w.a = x;
+
−  w.a += x;
+
−  return w.a;
+
−}
+
−
+
−int
+
−main ()
+
−{
+
−  unsigned __int128 x = foo ();
+
−  if ((unsigned long long) x != 0xfffffffffffffffeULL
+
−      || (unsigned long long) (x >> 64) != 1)
+
−    __builtin_abort ();
+
−  return 0;
+
−}