gcc/testsuite/gcc.dg/pr82274-2.c

   1 /* PR target/82274 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O2" } */
   4
   5 int
   6 main ()
   7 {
   8 #ifdef __SIZEOF_INT128__
   9   __int128 m = -(((__int128) 1) << (__CHAR_BIT__ * __SIZEOF_INT128__ / 2));
  10   volatile __int128 mv = m;
  11   __int128 r;
  12 #else
  13   long long m = -(1LL << (__CHAR_BIT__ * __SIZEOF_LONG_LONG__ / 2));
  14   volatile long long mv = m;
  15   long long r;
  16 #endif
  17   if (!__builtin_mul_overflow (mv, mv, &r))
  18     __builtin_abort ();
  19   if (!__builtin_mul_overflow_p (mv, mv, r))
  20     __builtin_abort ();
  21   if (!__builtin_mul_overflow (m, m, &r))
  22     __builtin_abort ();
  23   if (!__builtin_mul_overflow_p (m, m, r))
  24     __builtin_abort ();
  25   return 0;
  26 }