[Bug symtab/26095] New: gdb bug worked around in gcc/bb-reorder.c:pass_partition_blocks::gate

[Bug symtab/26095] New: gdb bug worked around in gcc/bb-reorder.c:pass_partition_blocks::gate

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26095

            Bug ID: 26095
           Summary: gdb bug worked around in
                    gcc/bb-reorder.c:pass_partition_blocks::gate
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: symtab
          Assignee: unassigned at sourceware dot org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

Current GCC contains this workaround in bb-reorder.c:
...
          /* Workaround a bug in GDB where read_partial_die doesn't cope        
             with DIEs with DW_AT_ranges, see PR81115.  */
          && !(in_lto_p && MAIN_NAME_P (DECL_NAME (fun->decl))));
...

The PR81115 is a typo, it actually refers to gcc PR 81155, as we can see from
the log message:
...
commit 8f72ce2cec8b8961f381995eb6e2c5de1cd0f3d3
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Fri Jan 12 19:20:49 2018 +0100

    re PR debug/81155 (Debug make check regressions in GCC 8.0)

            PR debug/81155
            * bb-reorder.c (pass_partition_blocks::gate): In lto don't
partition
            main to workaround a bug in GDB.

    From-SVN: r256592
...

The gcc PR (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81155 ) discusses a
GDB bug, but unfortunately it seems no GDB counterpart was filed to track it to
completion. 

So, I'm filing this PR for the specific purpose of acting as GDB counterpart
for the GCC PR.

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[Bug symtab/26095] gdb bug worked around in gcc/bb-reorder.c:pass_partition_blocks::gate

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26095

--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
My guess from the description of the problem is that this is a duplicate of
PR23331.

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[Bug symtab/26095] gdb bug worked around in gcc/bb-reorder.c:pass_partition_blocks::gate

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26095

--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #1)
> My guess from the description of the problem is that this is a duplicate of
> PR23331.

Which is fixed starting release 9.1, so I've filed a gcc PR to test whether the
workaround is still required, and possibly remove the workaround, PR gcc/95601
- "Remove workaround for GDB PR in pass_partition_blocks::gate".

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[Bug symtab/26095] gdb bug worked around in gcc/bb-reorder.c:pass_partition_blocks::gate

[pinskia at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26095

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=95601
                 CC|                            |pinskia at gcc dot gnu.org

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[Bug symtab/26095] gdb bug worked around in gcc/bb-reorder.c:pass_partition_blocks::gate

[pinskia at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26095

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://sourceware.org/bugz
                   |                            |illa/show_bug.cgi?id=23331

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