From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-479076-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 110399 invoked by alias); 2 Mar 2015 23:29:24 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Received: (qmail 110148 invoked by uid 48); 2 Mar 2015 23:29:21 -0000
From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/65277] [5 Regression] ice in get_untransformed_body with -O2
Date: Mon, 02 Mar 2015 23:29:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 5.0
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: hubicka at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Priority: P1
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 5.0
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields:
Message-ID: <bug-65277-4-8NkenfUz5u@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-65277-4@http.gcc.gnu.org/bugzilla/>
References: <bug-65277-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2015-03/txt/msg00220.txt.bz2

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65277

--- Comment #4 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
get_untransformed_body should turn itself into noop in !in_lto_p compilation as
all function bodies have DECL_RESULT. (it probably deserves comment, but that
way we check if the body was read)

Formatting is off:

  for (i = new_order_pos - 1; i >= 0; i--)
    {
      node = order[i];

      if (node->process)
        {
     expanded_func_count++;
     if(node->tp_first_run)
       profiled_func_count++;

    if (symtab->dump_file)
          fprintf (symtab->dump_file,
                   "Time profile order in expand_all_functions:%s:%d\n",
                   node->asm_name (), node->tp_first_run);
          node->process = 0;
          node->expand ();
        }
    }

but actual code makes sense. Node in question is:
_ZTch0_v0_n40_N3Ent4ThisEv/7 (virtual Ent& Ent::_ZTch0_v0_n40_N3Ent4ThisEv())
@0x7ffff6c5d620
  Type: function
  Body removed by symtab_remove_unreachable_nodes
  Visibility: externally_visible public weak comdat comdat_group:_ZN3Ent4ThisEv
one_only section:.text._ZN3Ent4ThisEv (implicit_section) virtual artificial
  Same comdat group as: _ZN3Ent4ThisEv/5
  References: 
  Referring: 
  Availability: not_available
  First run: 0
  Function flags: icf_merged
  Called by: 
  Calls: 

it was removed, so it is wrong that we try to output it.

The removal happens in ipa-icf and it is based on
cgraph_can_remove_if_no_direct_calls_p being wrong - if symbol is in comdat
group removing all direct calls to it may not make it removable if other
symbols hold it around... Will fix that.