[Bug debug/51564] New: [4.7 Regression] ICE in force_type_die, at dwarf2out.c:19288

[Bug debug/51564] New: [4.7 Regression] ICE in force_type_die, at dwarf2out.c:19288

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51564

             Bug #: 51564
           Summary: [4.7 Regression] ICE in force_type_die, at
                    dwarf2out.c:19288
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Keywords: lto
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: rguenth@gcc.gnu.org


typedef long int time_t;
void foo(void) {}
int main()
{
  foo();
  using ::time_t;
}

[Bug debug/51564] [4.7 Regression] ICE in force_type_die, at dwarf2out.c:19288

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51564

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2011-12-15
   Target Milestone|---                         |4.7.0
     Ever Confirmed|0                           |1

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-12-15 10:26:13 UTC ---
With -g -flto.

[Bug debug/51564] [4.7 Regression] ICE in force_type_die, at dwarf2out.c:19288

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51564

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
         AssignedTo|unassigned at gcc dot       |rguenth at gcc dot gnu.org
                   |gnu.org                     |

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-12-15 10:47:14 UTC ---
I have a patch.

[Bug debug/51564] [4.7 Regression] ICE in force_type_die, at dwarf2out.c:19288

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51564

--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-12-15 12:43:52 UTC ---
Author: rguenth
Date: Thu Dec 15 12:43:48 2011
New Revision: 182367

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=182367
Log:
2011-12-15  Richard Guenther  <rguenther@suse.de>

    PR lto/51564
    * tree.h (REGISTER_DEFS_IN_THIS_STMT, NECESSARY,
    STMT_IN_SSA_EDGE_WORKLIST): Remove no longer existing flag
    uses documentation.
    (TREE_ASM_WRITTEN): Update documentation to mention its use
    on TYPE_DECLs from debug info generation.
    * tree-streamer-out.c (pack_ts_base_value_fields): Stream
    TREE_ASM_WRITTEN as always zero for TYPE_DECLs, similar to
    all other types.

    * g++.dg/lto/pr51564-1_0.C: New testcase.

Added:
    trunk/gcc/testsuite/g++.dg/lto/pr51564-1_0.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-streamer-out.c
    trunk/gcc/tree.h

[Bug debug/51564] [4.7 Regression] ICE in force_type_die, at dwarf2out.c:19288

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51564

Richard Guenther <rguenth at gcc dot gnu.org> changed:

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

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-12-15 12:44:32 UTC ---
Fixed.

[Bug debug/51564] [4.7 Regression] ICE in force_type_die, at dwarf2out.c:19288

[matt at use dot net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51564

Matt Hargett <matt at use dot net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |matt at use dot net

--- Comment #5 from Matt Hargett <matt at use dot net> 2012-05-03 20:56:40 UTC ---
I believe I'm hitting (what I'm pretty sure is) this with same bug GCC 4.6
trunk as well. Can you apply the patch to lto-streamer-out.c on the 4_6 branch
as well? Thanks!

In member function ‘__base_dtor ’:
lto1: internal compiler error: in force_type_die, at dwarf2out.c:21059

[Bug debug/51564] [4.7 Regression] ICE in force_type_die, at dwarf2out.c:19288

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51564

--- Comment #6 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-05-04 08:42:31 UTC ---
I'm always relucant in backporting this kind of fixes as the LTO state is
so different on branches.  Can you confirm that backporting this fix fixes
problems for you?  I ask because type-decls do not survive on the 4.6 branch
AFAIK.

[Bug debug/51564] [4.7 Regression] ICE in force_type_die, at dwarf2out.c:19288

[matt at use dot net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51564

--- Comment #7 from Matt Hargett <matt at use dot net> 2012-05-11 20:19:01 UTC ---
Applying the patch does allow DWARF serialization to get further, but now it
dies here:
internal compiler error: in add_AT_specification, at dwarf2out.c:7536

It looks like this problem (hiding beneath the original) is related to PR47839,
whose fix was fortran front-end specific.

Should I just file a new bug and reference these other bugs?

[Bug debug/51564] [4.7 Regression] ICE in force_type_die, at dwarf2out.c:19288

[rguenther at suse dot de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51564

--- Comment #8 from rguenther at suse dot de <rguenther at suse dot de> 2012-05-14 08:12:44 UTC ---
On Fri, 11 May 2012, matt at use dot net wrote:

> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51564
> 
> --- Comment #7 from Matt Hargett <matt at use dot net> 2012-05-11 20:19:01 UTC ---
> Applying the patch does allow DWARF serialization to get further, but now it
> dies here:
> internal compiler error: in add_AT_specification, at dwarf2out.c:7536
> 
> It looks like this problem (hiding beneath the original) is related to PR47839,
> whose fix was fortran front-end specific.
> 
> Should I just file a new bug and reference these other bugs?

No, it just means that -g is (expected) somewhat broken still in GCC 4.6.
Only with GCC 4.7 I spent considerable time trying to solve all ICEs
in that area.

It's not worth cherry-picking selcted fixes because they usually expose
other bugs.

Richard.