[Bug lto/52605] New: LTO -g ICE when looking up context of VMTs of classes defined within functions

[Bug lto/52605] New: LTO -g ICE when looking up context of VMTs of classes defined within functions

[jamborm at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52605

             Bug #: 52605
           Summary: LTO -g ICE when looking up context of VMTs of classes
                    defined within functions
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: jamborm@gcc.gnu.org
              Host: x86_64-linux-gnu
            Target: x86_64-linux-gnu


Created attachment 26905
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26905
Testcase

When compiling the attached testcase with -flto and -g, I get the
following ICE:

lto1: internal compiler error: tree check: expected tree that contains ‘decl
minimal’ structure, have ‘record_type’ in lookup_decl_die, at dwarf2out.c:5118

This is the same problem I first encountered when LTOing Firefox and
which I reported in the mailing list a while ago
(http://gcc.gnu.org/ml/gcc-patches/2012-03/msg00551.html) but this
testcase is close to minimal.

The reason why we do not hit this wrong use of decl_function_context
without LTO is that the function dwarf2out_decl is never called on
VMTs when not doing LTO.

[Bug lto/52605] LTO -g ICE when looking up context of VMTs of classes defined within functions

[jamborm at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52605

Martin Jambor <jamborm at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hubicka at gcc dot gnu.org
      Known to fail|                            |4.7.0, 4.8.0

--- Comment #1 from Martin Jambor <jamborm at gcc dot gnu.org> 2012-04-23 17:04:23 UTC ---
This is still the only problem that prevents me from LTO building
Firefox with -g.  Moreover, I have just verified the problem is also
present also in 4.7 (and it's also the only one).  I really think we
should fix this for 4.7.1.

My patch proposed on the mailing list still applies (to both trunk and
the branch).

[Bug lto/52605] LTO -g ICE when looking up context of VMTs of classes defined within functions

[jamborm at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52605

--- Comment #2 from Martin Jambor <jamborm at gcc dot gnu.org> 2012-05-02 19:50:40 UTC ---
Author: jamborm
Date: Wed May  2 19:50:37 2012
New Revision: 187063

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=187063
Log:
2012-05-02  Martin Jambor  <mjambor@suse.cz>

    PR lto/52605
    * dwarf2out.c (dwarf2out_decl): Only lookup die representing context
    of a variable when the contect is a function.

    * gcc/testsuite/g++.dg/lto/pr52605_0.C: New test.


Added:
    trunk/gcc/testsuite/g++.dg/lto/pr52605_0.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/dwarf2out.c
    trunk/gcc/testsuite/ChangeLog

[Bug lto/52605] LTO -g ICE when looking up context of VMTs of classes defined within functions

[jamborm at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52605

--- Comment #3 from Martin Jambor <jamborm at gcc dot gnu.org> 2012-05-03 17:00:48 UTC ---
Author: jamborm
Date: Thu May  3 17:00:32 2012
New Revision: 187109

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=187109
Log:
2012-05-03  Martin Jambor  <mjambor@suse.cz>

    PR lto/52605
    * dwarf2out.c (dwarf2out_decl): Only lookup die representing context
    of a variable when the contect is a function.

    * gcc/testsuite/g++.dg/lto/pr52605_0.C: New test.


Added:
    branches/gcc-4_7-branch/gcc/testsuite/g++.dg/lto/pr52605_0.C
Modified:
    branches/gcc-4_7-branch/gcc/ChangeLog
    branches/gcc-4_7-branch/gcc/dwarf2out.c
    branches/gcc-4_7-branch/gcc/testsuite/ChangeLog

[Bug lto/52605] LTO -g ICE when looking up context of VMTs of classes defined within functions

[jamborm at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52605

Martin Jambor <jamborm at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED

--- Comment #4 from Martin Jambor <jamborm at gcc dot gnu.org> 2012-05-03 17:01:45 UTC ---
This should now be fixed.