libsanitizer merge from upstream r208536

[Peter Bergner]

> On Mon, May 26, 2014 at 9:57 AM, Jakub Jelinek <jakub@redhat.com> wrote:
> > Doesn't look like the ppc32 port would be in any worse shape than the 64-bit
> > one.
> > Peter has brought a real problem, in particular the allocator now newly relying on
> > 2 x word size atomics which is definitely non-portable, I don't see why the answer
> > to that should be disable your port or build a buildbot.

Right, the ppc32 results definitely show it's on par with the ppc64 results.


On Mon, 2014-05-26 at 10:36 +0400, Konstantin Serebryany wrote:
> Because this is my default reply to any such case. :)

I hope that is a humorous reply and not a serious one.
In one of my other posts, I asked should 32-bit ports even attempt
to use the 2 * word_size atomics.  What is the code doing such that
it wants to use a 2 * word_size atomic?  Is it as simple as commenting
that code out for 32-bit builds of the library or do we really have
to support that?

Peter