[Bug target/65233] [5 Regression] ICE (segfault) on arm-linux-gnueabihf

[doko at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65233

--- Comment #8 from Matthias Klose <doko at gcc dot gnu.org> ---
this is the testcase from ardour3:

$ g++ -c -g -O3 -fPIC track3.ii    
track3.ii: In member function 'void F::apply(void (Track::*)(T, void*), T,
void*) [with T = bool]':
track3.ii:108:1: internal compiler error: Segmentation fault
 F::apply (void (Track::*p1) (T, void *), T p2, void *)
 ^
Please submit a full bug report,
with preprocessed source if appropriate.

$ cat track3.ii
namespace std
{
template < typename _Tp > void swap (_Tp p1, _Tp & p2)
{
    p2 = p1;
} template < typename _Tp > struct A
{
    _Tp & operator* ();
};
template < typename _Tp > class B
{
public:
    typedef A < _Tp > iterator;
};
}

int a;
class C
{
    int use_count_;
public:
    virtual void destroy ();
    void release ()
    {
        if (use_count_)
            destroy ();
    }
};
class shared_count
{
    C *pi_;
public:
    shared_count ():pi_ ()
    {
    }
    ~shared_count ()
    {
        if (pi_)
            pi_->release ();
    }
    shared_count (shared_count const &p1):pi_ (p1.pi_)
    {
        if (pi_)
            __sync_fetch_and_add (&a, 1);
    }
    void swap (shared_count & p1)
    {
        C *b = p1.pi_;
        p1.pi_ = pi_;
        pi_ = b;
    }
};

template < class T > class D
{
    typedef D this_type;
public:
    typedef T element_type;
    D ()
    {
    } template < class Y > D (D < Y > p1, element_type * p2):px (p2),
    pn (p1.pn)
    {
    } D & operator= (D p1)
    {
        this_type (p1).swap (*this);
        return *this;
    }
    element_type *get ()
    {
    }
    typedef element_type *this_type::*unspecified_bool_type;
    operator      unspecified_bool_type ()
    {
        return px ? 0 : &this_type::px;
    }
    void swap (D & p1)
    {
        std::swap (px, p1.px);
        pn.swap (p1.pn);
    } element_type *px;
    shared_count pn;
};

class Track;
template < class, class U > D < Track > dynamic_pointer_cast (D < U > &p1)
{
    Track *p;
    return p ? D < Track > (p1, p) : D < Track > ();
}

class F
{
public:
    template < class T > void apply (void (Track::*)(T, void *), T,
                                     void *);
};
class G
{
protected:
    F _route_group;
};
class Track:G
{
    void prep_record_enabled (bool, void *);
};
template < class T > void
F::apply (void (Track::*p1) (T, void *), T p2, void *)
{
    for (std::B < D < int > >::iterator i;;)
    {
        D < Track > c;
        if (c = dynamic_pointer_cast < Track > (*i))
            (c.get ()->*p1) (p2, this);
    }
}

void
Track::prep_record_enabled (bool p1, void *)
{
    _route_group.apply (&Track::prep_record_enabled, p1, &_route_group);
}