[Bug c++/92384] [8/9/10 Regression] Empty class instances have different equal testing result among GCC versions

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92384

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reduced:

class Empty {};

bool is_same(Empty a, Empty b)
{
  __builtin_printf("%p\n%p\n", &a, &b);
  void* v[] = { &a, &b };
  return v[0] == v[1];
}

int main() {
  Empty a, b;

  if (is_same(a, b))
    __builtin_abort();
}


0x7ffc7b54ad20
0x7ffc7b54ad20
Aborted (core dumped)