Broken LTO bootstrtap for more than a month

Broken LTO bootstrtap for more than a month

[H.J. Lu]

Hi,

LTO bootstrap has been broken for more than a month:

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48148

In the meantime, we have more LTO bootstrap regressions:

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48652
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48671

Do we have a plan to fix LTO bootstrap

Thanks.

-- 
H.J.

Re: Broken LTO bootstrtap for more than a month

[Eric Botcazou]

> LTO bootstrap has been broken for more than a month:
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48148

I'm about to submit a fix for the .Ldebug_info0 failure.

-- 
Eric Botcazou

Re: Broken LTO bootstrtap for more than a month

[Michael Matz]

Hi,

On Mon, 18 Apr 2011, H.J. Lu wrote:

> LTO bootstrap has been broken for more than a month:

I was LTO bootstrapping yesterday just fine.  You're talking about 
bootstrap-profiled.


Ciao,
Michael.

Re: Broken LTO bootstrtap for more than a month

[Eric Botcazou]

> I was LTO bootstrapping yesterday just fine.  You're talking about
> bootstrap-profiled.

Not clear at all, a regular LTO bootstrap had failed on cc1 for days here.

-- 
Eric Botcazou

Re: Broken LTO bootstrtap for more than a month

[Michael Matz]

Hi,

On Tue, 19 Apr 2011, Eric Botcazou wrote:

> > I was LTO bootstrapping yesterday just fine.  You're talking about
> > bootstrap-profiled.
> 
> Not clear at all, a regular LTO bootstrap had failed on cc1 for days here.

Hmpf.  Strange.  I've bootstrapped with all languages except Ada 
yesterday, with gold as plugin-ld.


Ciao,
Michael.

Re: Broken LTO bootstrtap for more than a month

[Eric Botcazou]

> Hmpf.  Strange.  I've bootstrapped with all languages except Ada
> yesterday, with gold as plugin-ld.

GNU ld (with plugins) for me, but --enable-checking=yes,rtl.  Maybe H.J. had 
e.g. --enable-checking=release.  In any case, something is brittle ATM.

-- 
Eric Botcazou

Re: Broken LTO bootstrtap for more than a month

[Richard Guenther]

On Tue, Apr 19, 2011 at 3:51 PM, Eric Botcazou <ebotcazou@adacore.com> wrote:
>> Hmpf.  Strange.  I've bootstrapped with all languages except Ada
>> yesterday, with gold as plugin-ld.
>
> GNU ld (with plugins) for me, but --enable-checking=yes,rtl.  Maybe H.J. had
> e.g. --enable-checking=release.  In any case, something is brittle ATM.

Not really unexpected - LTO testing coverage is pretty low unless we force
everyone to do LTO bootstraps (and then LTO bootstrap is slow because
of the redundant linking for the checksums and re-optimizing libbackend.a
all the time).

Richard.

Re: Broken LTO bootstrtap for more than a month

[H.J. Lu]

On Tue, Apr 19, 2011 at 7:01 AM, Richard Guenther
<richard.guenther@gmail.com> wrote:
> On Tue, Apr 19, 2011 at 3:51 PM, Eric Botcazou <ebotcazou@adacore.com> wrote:
>>> Hmpf.  Strange.  I've bootstrapped with all languages except Ada
>>> yesterday, with gold as plugin-ld.
>>
>> GNU ld (with plugins) for me, but --enable-checking=yes,rtl.  Maybe H.J. had
>> e.g. --enable-checking=release.  In any case, something is brittle ATM.
>
> Not really unexpected - LTO testing coverage is pretty low unless we force
> everyone to do LTO bootstraps (and then LTO bootstrap is slow because
> of the redundant linking for the checksums and re-optimizing libbackend.a
> all the time).
>

I have been doing LTO bootstrap and reporting failures. The current
LTO bootstrap failure us

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48671

-- 
H.J.

Re: Broken LTO bootstrtap for more than a month

[Jan Hubicka]

> Hi,
> 
> On Mon, 18 Apr 2011, H.J. Lu wrote:
> 
> > LTO bootstrap has been broken for more than a month:
> 
> I was LTO bootstrapping yesterday just fine.  You're talking about 
> bootstrap-profiled.

I just fixed at least the inliner profiledbootstrap ICE.  I will try to profiledltobootstrap next.

Honza
> 
> 
> Ciao,
> Michael.

Re: Broken LTO bootstrtap for more than a month

[Jan Hubicka]

> On Tue, Apr 19, 2011 at 7:01 AM, Richard Guenther
> <richard.guenther@gmail.com> wrote:
> > On Tue, Apr 19, 2011 at 3:51 PM, Eric Botcazou <ebotcazou@adacore.com> wrote:
> >>> Hmpf.  Strange.  I've bootstrapped with all languages except Ada
> >>> yesterday, with gold as plugin-ld.
> >>
> >> GNU ld (with plugins) for me, but --enable-checking=yes,rtl.  Maybe H.J. had
> >> e.g. --enable-checking=release.  In any case, something is brittle ATM.
> >
> > Not really unexpected - LTO testing coverage is pretty low unless we force
> > everyone to do LTO bootstraps (and then LTO bootstrap is slow because
> > of the redundant linking for the checksums and re-optimizing libbackend.a
> > all the time).
> >
> 
> I have been doing LTO bootstrap and reporting failures. The current
> LTO bootstrap failure us
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48671

This is FDO problem, not LTO problem and should be fixed now.

Honza
> 
> -- 
> H.J.

Re: Broken LTO bootstrtap for more than a month

[Toon Moene]

On 04/20/2011 03:16 AM, Jan Hubicka wrote:

>> On Tue, Apr 19, 2011 at 7:01 AM, Richard Guenther

>> I have been doing LTO bootstrap and reporting failures. The current
>> LTO bootstrap failure us
>>
>> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48671
>
> This is FDO problem, not LTO problem and should be fixed now.
>
> Honza

Perhaps more kinds of LTO bootstraps are needed.

I can squeeze what I did here:

http://gcc.gnu.org/ml/gcc-testresults/2011-04/msg01900.html

between the 18 UTC and 00 UTC run of the weather model (it needs about 1 
hour 45 minutes) [ between 0:20 and 2:05 UTC daily ].

It only tests C and Fortran, but those are the most tested frontends 
anyway (/snark)

[ counting tests in the Summary list ]

-- 
Toon Moene - e-mail: toon@moene.org - phone: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
At home: http://moene.org/~toon/; weather: http://moene.org/~hirlam/
Progress of GNU Fortran: http://gcc.gnu.org/wiki/GFortran#news