3-stage bootstrap build bots?

Do any of the current build bots for llvm.org perform 3-stage
bootstraps with file comparison of the stage2 and stage3 object files
and generated headers? On x86_64-apple-darwin16 using the fink
projects llvm packaging methodology (crafted by David Fang), I am
seeing non-deterministic file comparison failures in current trunk
that goes back as far as r296837.

http://bugs.llvm.org/show_bug.cgi?id=32342

The non-deterministic nature of this bug is making it rather difficult
to pinpoint the actual commit that triggered it.
       Jack
ps The issue seems to be non-deterministic in both its appearance and
the exact subset of stage2/stage3 object files that differ when it
triggers.

Interesting.
I 3-stage basically every day on darwin, and have not gotten a single failure yet.
i just use cmake + ninja though
Are you sure it’s not related to the computer involved?

Interesting.
I 3-stage basically every day on darwin, and have not gotten a single
failure yet.
i just use cmake + ninja though
Are you sure it's not related to the computer involved?

These builds are on a MacPro 3,1 using Xcode 8,2,1 as the system
compiler. The same build approach...

http://fink.cvs.sourceforge.net/viewvc/fink/dists/10.9-libcxx/stable/main/finkinfo/languages/llvm39.info?revision=1.2&view=markup

has been used to test
llvm/clang/clang-tools-extra/compiler-rt/openmp/polly trunk for
several years now and this is the first time I've seen instability in
the file comparison of the stage2/stage3 build.
       Jack
ps I've repeated the build of
llvm/clang/clang-tools-extra/compiler-rt/openmp/polly for the 4.0.0
release and it still passes the file comparison of the stage2/stage3
without issue. The fact that the exact list of files failing the
stage2/stage3 comparison varies seems especially concerning.