[LTO] free_language_specifics crashes C++ pretty-printer

[Richard Guenther]

On Thu, Oct 9, 2008 at 10:24 AM, Doug Kwan (關振德) <dougkwan@google.com> wrote:
> The error happens during output of a qualified typename.   Do we store
> strings of fully qualified type names

No, but I don't see how this matters here.  announce_function
is a debugging thing, and in the end we shouldn't emit new
diagnostics from the link-time run of LTO.

Richard.

> -Doug
>
> 2008/10/9 Richard Guenther <richard.guenther@gmail.com>:
>> 2008/10/9 Doug Kwan (關振德) <dougkwan@google.com>:
>>> Without -quiet, cc1plus prints out declaration of functions inside
>>> cgraph_expand_function.
>>
>> Ah, I see.  I think it would be better to dump the mangled
>> name in this case, DECL_ASSEMBLER_NAME.  So maybe
>> just add a flag to announce_function whether the mangled
>> or unmangled name is to be printed.
>>
>> Richard.
>>
>>> -Doug
>>>
>>> in cgraphunit.c ...
>>>
>>> static void
>>> cgraph_expand_function (struct cgraph_node *node)
>>> {
>>>  tree decl = node->decl;
>>>
>>>  /* We ought to not compile any inline clones.  */
>>>  gcc_assert (!node->global.inlined_to);
>>>
>>>  announce_function (decl);
>>>  ^^^^^^^^^^^^^^^^^^^^^^^^
>>>
>>> ... in toplev.c
>>>
>>> /* Called when the start of a function definition is parsed,
>>>   this function prints on stderr the name of the function.  */
>>> void
>>> announce_function (tree decl)
>>> {
>>>  if (!quiet_flag)
>>>    {
>>>      if (rtl_dump_and_exit)
>>>        fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
>>>      else
>>>        fprintf (stderr, " %s", lang_hooks.decl_printable_name (decl, 2));
>>>      fflush (stderr);
>>>      pp_needs_newline (global_dc->printer) = true;
>>>      diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL);
>>>    }
>>> }
>>>
>>>
>>> 2008/10/9 Richard Guenther <richard.guenther@gmail.com>:
>>>> On Thu, Oct 9, 2008 at 8:35 AM, Doug Kwan (關振德) <dougkwan@google.com> wrote:
>>>>> I am working on a bug where free_language_specifics caused the C++
>>>>> pretty-printer crash because it clears all TYPE_CONTEXT.  I can add a
>>>>> band-aid in dump_typename but that does not look like the right fix to
>>>>> me.  Is there a better solution?
>>>>
>>>> How do we end up calling the pretty-printer?
>>>>
>>>> Richard.
>>>>
>>>>>
>>>>> -Doug
>>>>>
>>>>
>>>
>>
>