[Bug lto/78908] [6/7 Regression] lto1: internal compiler error: in lto_read_decls, at lto/lto.c:1814

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78908

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-12-23
                 CC|                            |hubicka at gcc dot gnu.org,
                   |                            |trippels at gcc dot gnu.org
      Known to work|                            |5.4.1
            Summary|lto1: internal compiler     |[6/7 Regression] lto1:
                   |error: in lto_read_decls,   |internal compiler error: in
                   |at lto/lto.c:1814           |lto_read_decls, at
                   |                            |lto/lto.c:1814
     Ever confirmed|0                           |1
      Known to fail|                            |6.3.0, 7.0

--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
markus@x4 tmp % cat lto_read_decls_reduce_ut.ii
struct A {
  unsigned depth : 1;
};
template <typename> struct Writer_Endpoint;
template <unsigned long> struct B;
struct C {
  struct D {
    template <typename> static Writer_Endpoint<B<0>> *__test();
    typedef decltype(__test<int>()) type;
  };
  D::type operator->();
};
enum Participant_Id { NYSE_MKT };
using participant_id = Participant_Id;
struct F {
  virtual void on_inner_remove(unsigned long, A const &);
};
template <typename> struct O : F {
  void on_inner_remove(unsigned long, A const &);
};
template <typename Logger> struct G {
  template <typename T> void insert(T p1) { logger_->insert(p1); }
  Logger *logger_;
};
template <typename Logger, typename T> void operator<<(Logger p1, T p2) {
  p1.insert(p2);
}
struct H;
struct I {
  H *operator->();
};
struct J {
  using size_type = int;
};
template <unsigned long queue_size> struct Writer_Endpoint<B<queue_size>> : J {
  template <typename, typename, typename...> void emplace();
  struct K;
  template <typename> size_type next_index();
};
template <unsigned long queue_size> struct Writer_Endpoint<B<queue_size>>::K {
  K(Writer_Endpoint *, size_type);
};
template <unsigned long queue_size>
template <typename, typename, typename...>
void Writer_Endpoint<B<queue_size>>::emplace() {
  size_type a = next_index<int>();
  K(0, a);
}
struct H {
  C __trans_tmp_4;
  template <typename T> void insert(T const &);
  decltype(__trans_tmp_4) wep_;
};
template <typename T> void H::insert(T const &) { wep_->emplace<T, int>(); }
template <typename> struct L {
  template <typename T> void insert(T const &);
  I backend_;
};
template <typename Tag> template <typename T> void L<Tag>::insert(T const &p1)
{
  backend_->insert(p1);
}
G<L<int>> b, c;
template <typename T_ENCODER>
void O<T_ENCODER>::on_inner_remove(unsigned long, A const &p2) try {
  b << p2.depth;
} catch (...) {
}
struct M;
template <class = int> struct UT_Merger;
template <> struct UT_Merger<> : O<M> {
  UT_Merger() {}
};
template <unsigned long> struct N {
  int const *process();
  N(F p1, int, participant_id, int) : handler_(p1) {}
  void process(int const &, int const &, unsigned short);
  void process(int const &, A const &, unsigned short);
  unsigned char expected_detail_level_;
  F &handler_;
};
template <unsigned long TBookDepth> int const *N<TBookDepth>::process() {
  process(0, 0, 0);
  process(0, *reinterpret_cast<A *>(0), 0);
}
template <unsigned long TBookDepth>
void N<TBookDepth>::process(int const &, int const &, unsigned short) try {
  c << expected_detail_level_;
} catch (...) {
}
template <unsigned long TBookDepth>
void N<TBookDepth>::process(int const &, A const &p2, unsigned short) {
  handler_.on_inner_remove(0, p2);
}
void Synsip_Book_ut_channel_info_TestTestBody() {
  F h;
  N<0> d(h, 0, NYSE_MKT, 0);
  d.process();
}


markus@x4 tmp % g++ -std=c++11 -flto -shared -fPIC -O2
lto_read_decls_reduce_ut.ii
lto_read_decls_reduce_ut.ii:98:1: error: Two symbols with same comdat_group are
not linked by the same_comdat_group list.
 }
 ^
_ZN15Writer_EndpointI1BILm0EEE7emplaceIhiJEEEvv/37 (void
Writer_Endpoint<B<queue_size> >::emplace() [with <template-parameter-2-1> =
unsigned char:1; <template-parameter-2-2> = int; <template-parameter-2-3> = {};
long unsigned int queue_size = 0]) @0x7ffbc66efa10
  Type: function definition analyzed
  Visibility: public weak comdat
comdat_group:_ZN15Writer_EndpointI1BILm0EEE7emplaceIhiJEEEvv one_only
  previous sharing asm name: 25
  References:
  Referring:
  First run: 0
  Function flags: body
  Called by: _ZN1H6insertIhEEvRKT_/36 (1.00 per call) (can throw external)
  Calls: _ZN15Writer_EndpointI1BILm0EEE1KC1EPS2_i/46 (1.00 per call) (can throw
external) _ZN15Writer_EndpointI1BILm0EEE10next_indexIiEEiv/45 (1.00 per call)
(can throw external)
_ZN15Writer_EndpointI1BILm0EEE7emplaceIhiJEEEvv/25 (void
Writer_Endpoint<B<queue_size> >::emplace() [with <template-parameter-2-1> =
unsigned char; <template-parameter-2-2> = int; <template-parameter-2-3> = {};
long unsigned int queue_size = 0]) @0x7ffbc66ef170
  Type: function definition analyzed
  Visibility: public weak comdat
comdat_group:_ZN15Writer_EndpointI1BILm0EEE7emplaceIhiJEEEvv one_only
  next sharing asm name: 37
  References:
  Referring:
  First run: 0
  Function flags: body
  Called by: _ZN1H6insertIhEEvRKT_/24 (1.00 per call) (can throw external)
  Calls: _ZN15Writer_EndpointI1BILm0EEE1KC1EPS2_i/46 (1.00 per call) (can throw
external) _ZN15Writer_EndpointI1BILm0EEE10next_indexIiEEiv/45 (1.00 per call)
(can throw external)
lto_read_decls_reduce_ut.ii:98:1: internal compiler error: symtab_node::verify
failed
0x94ff61 symtab_node::verify_symtab_nodes()
        /home/markus/gcc/gcc/symtab.c:1217
0x9630bf symtab_node::checking_verify_symtab_nodes()
        /home/markus/gcc/gcc/cgraph.h:614
0x9630bf symbol_table::compile()
        /home/markus/gcc/gcc/cgraphunit.c:2403
0x965ca6 symbol_table::compile()
        /home/markus/gcc/gcc/cgraphunit.c:2587
0x965ca6 symbol_table::finalize_compilation_unit()
        /home/markus/gcc/gcc/cgraphunit.c:2584