[Bug middle-end/81318] [8 regression] ICE in to_reg_br_prob_base, at profile-count.h:189

["trippels at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81318

--- Comment #8 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Reduced Boost testcase:

struct A;
struct B {
  typedef A *type;
};
struct C {
  B::type operator->();
};
struct D {
  struct F {
    F(void(void *), F *, void());
  };
  template <typename FunT> struct J : F {
    FunT m_Function;
    J(FunT) : F(m_fn1, 0, 0) {}
    static void m_fn1(void *) { static_cast<J *>(0)->m_Function(); }
  };
  F *m_pImpl;
  template <typename FunT> D(FunT p1) : m_pImpl(new J<FunT>(p1)) {}
};
struct A {
  void m_fn2(D);
};
struct G {
  void operator()() { throw; }
};
struct H {
  void operator()() try { G()(); } catch (int) {
  }
};
struct I {
  void operator()() { H()(); }
};
void fn1() {
  I a;
  C b;
  b->m_fn2(a);
}