[Bug target/92723] ICE in expand_shift_1, at expmed.c:2635

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92723

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Slightly adjusted, so that there are no warnings on it, with -O2 -std=c++17
-Wall -W when it compiles successfully, and with s/O2/O3/ when there is the
ICE:
template <typename> struct d;
template <typename e> struct d<e &> { typedef e g; };
template <typename e> struct ac {
  typedef typename d<e>::g g;
};
template <typename e> using af = typename ac<e>::g;
template <bool, typename, typename ae> using ah = ae;
struct aj {
  template <typename h, typename... ak> void al(h *, ak... an) { h(an...); }
};
template <typename> using ao = aj;
template <typename> class allocator : public ao<int> {};
template <typename> struct ap;
template <typename e> struct ap<allocator<e>> {
  using aq = allocator<e>;
  template <typename h, typename... ak>
  static void al(aq ar, h am, ak... an) {
    ar.al(am, an...);
  }
};
struct as {
  as(allocator<int>);
};
template <typename> struct at { allocator<int> av; };
template <typename e, typename aw> struct ax {
  struct ay : as {
    ay(aw ar) : as(ar) {}
  };

  template <typename... ak> ax(aw ar, ak... an) : az(ar) {
    ap<aw>::al(ar, ba(), an...);
  }
  e *ba();
  ay az;
};
struct bb {
  template <typename e, typename aw, typename... ak>
  bb(e *, at<aw> ar, ak... an) {
    ax<e, aw>(ar.av, an...);
  }
};
template <typename e> struct au {
  using bc = e;
  template <typename aw, typename... ak>
  au(aw bd, ak... an) : be(ba, bd, an...) {}
  bc *ba = nullptr;
  bb be;
};
template <typename e> struct bf : au<e> {
  template <typename aw, typename... ak>
  bf(aw bd, ak... an) : au<e>(bd, an...) {}
  template <typename bg, typename aw, typename... ak>
  friend bf<bg> bh(const aw &, ak &&...);
};
template <typename e, typename aw, typename... ak>
bf<e> bh(const aw &, ak &&... an) {
  bf<e>(at<aw>{}, an...);
  for (;;);
}
template <typename e, typename... ak> void bi(ak... an) {
  bh<e>(allocator<int>(), an...);
}
template <typename> constexpr bool bj = false;
class j;
struct bk {
  j *operator->();
};
struct bn : public bk {
  bn(decltype(nullptr));
};
class br;
template <typename> using bp = br;
template <typename bq, typename bu> bq bs(bu);
template <typename bt> bt *bx();
using bv = struct bw {
  template <typename cb> void by() {
    int bz = 0;
    cb::ca(bz);
  }
};
struct cf {
  using cc = int;
};
struct cd {
  char k;
  void ce();
};
struct br : public cd {
  int &operator[](long l) {
    int *cj = reinterpret_cast<int *>(k);
    return cj[l];
  }
};
struct m {
  using cc = int;
};
template <typename> constexpr bool n = false;
struct j {
  using cg = int;
  using q = bp<cg>;
  q o();
} ch;
template <typename... r, typename ci> bool cn(ci f) {
  ((bs<r *>(ch) ? f(*bs<r *>(ch)) : false) || ...);
  return false;
}
template <typename ck> struct p {
  using cl = int;
  static void co(bp<int> a, int b, bp<cl> c) {
    a.ce();
    for (long i = 0; i < 8; ++i)
      c[i] = ck::apply(a[i], b);
  }
};
template <template <typename, typename> class ck> struct cw {
  template <typename ci> bool da(ci f) { cn<cf, m>(f); return false; }
  template <typename ci> bool cy(ci f) {
    da([&](auto cz) { return da([&](auto dg) { return f(cz, dg); }); });
    return false;
  }
  static bv ca(int bz) { bi<cw>(bz); return bv(); }
  cw(long) {
    cy([](auto &db, auto &de) {
      using cx = af<decltype(db)>;
      using cr = af<decltype(de)>;
      using cv = typename cx::cc;
      using cu = typename cr::cc;
      using dd = ah<bj<cv>, cv, j>;
      using dl = ah<n<int>, int, p<ck<cv, cu>>>;
      bn df = nullptr;
      auto di = df->o();
      if (auto dh = bx<dd>())
        dl::co(dh->o(), 0, di);
      return false;
    });
  }
};
template <typename, typename> struct s {
  using cl = unsigned long;
  template <typename dj = cl> static dj apply(int a, int b) {
    return dj(a)>> b | dj(a) <<(sizeof(dj) * 8 - b);
  }
};
using t = cw<s>;
bw dn;
void dm() { dn.by<t>(); }