[llvm] [SystemZ] Improve CCMask optimization (PR #171137)

[Dominik Steenken via llvm-commits]

dominik-steenken wrote:

> LLVM Buildbot has detected a new failure on builder `sanitizer-x86_64-linux` running on `sanitizer-buildbot1` while building `llvm` at step 2 "annotate".
> 
> Full details are available at: https://lab.llvm.org/buildbot/#/builders/66/builds/23401
> Here is the relevant piece of the build log for the reference

All of the subvsequent builds of this pass successfully. I think this can be ignored.

https://github.com/llvm/llvm-project/pull/171137