[llvm] r227414 - [LPM] Try again to appease powerpc64 in its self host. I've been unable

[Chandler Carruth]

On Wed, Jan 28, 2015 at 7:19 PM, Hal Finkel <hfinkel at anl.gov> wrote:

> ----- Original Message -----
> > From: "Chandler Carruth" <chandlerc at gmail.com>
> > To: llvm-commits at cs.uiuc.edu
> > Sent: Wednesday, January 28, 2015 8:34:17 PM
> > Subject: [llvm] r227414 - [LPM] Try again to appease powerpc64 in its
> self    host. I've been unable
> >
> > Author: chandlerc
> > Date: Wed Jan 28 20:34:17 2015
> > New Revision: 227414
> >
> > URL: http://llvm.org/viewvc/llvm-project?rev=227414&view=rev
> > Log:
> > [LPM] Try again to appease powerpc64 in its self host. I've been
> > unable
> > to get a powerpc64 host so that I can reproduce and test this, but it
> > only impacts that platform so trying the only other realistic option.
> >
> > According to Ulrich, who debugged this initially, initial-exec is
> > likely
> > to be sufficient for our needs and not subject to this bug. Will
> > watch
> > the build bots to see.
> >
> > If this doesn't work, I'll be forced to cut a really ugly
> > pthread-based
> > approach into the primary user (our stack trace printing) as that
> > user
> > cannot use the ThreadLocal implementation due to lifetime issues.
>
> What about if we added -Wl,--no-tls-optimize
> -Wl,--no-tls-get-addr-optimize to our self-hosting build flags for now?
>
>  -Hal


It happens that I managed to get a self host going on a PPC machine, and
initial-exec fixed the issue for me. But not the build bot! Oh no, that one
is still broken.
http://lab.llvm.org:8011/builders/clang-ppc64-elf-linux2/builds/17257/steps/compile.llvm.stage2/logs/stdio

I am at a loss, and not really competent to propose a fix as even with the
only ppc machine I have, I no longer can reproduce this.
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