[LLVMdev] Self-hosting failure in ARM again

[Renato Golin]

Folks,

It seems we got the same issue with Clang alignment as before:

http://lab.llvm.org:8011/builders/clang-cmake-armv7-a15-selfhost/builds/3025
http://lab.llvm.org:8011/builders/clang-cmake-armv7-a15-selfhost-neon/builds/485
http://lab.llvm.org:8011/builders/clang-cmake-thumbv7-a15-full-sh/builds/118

Commits between 231213 and 231255.

There are a few issues that could have brought it:
 * Seth's changes to Clang (unlikely)
 * Michael's changes to DAGCombiner (likely)
 * David's generic changes in LLVM (unlikely)

I'll be bisecting this like I did earlier, but I'd like to keep you
guys posted of the potential reverts, since this is not jut breaking
tests, but breaking Clang self-hosting (which cost us weeks during the
release).

Ahmed,

You have a better idea what the real problem is. I think maybe we
should bump its priority up again, or this will keep popping every
month.

Did you file a bug?

cheers,
--renato