[llvm] [AArch64] Adjust comparison constant if adjusting it means less instructions (PR #151024)

[Benjamin Maxwell via llvm-commits]

MacDue wrote:

Looks like this is failing on the buildbots: https://lab.llvm.org/buildbot/#/builders/51/builds/21763 shows a "should not be -1 here!" assertion. 

https://github.com/llvm/llvm-project/pull/151024