[llvm] [SimplifyCFG] Support not in chain of comparisons. (PR #156497)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> LGTM. As for the regression, can we fix it in CVP/SCCP?

https://github.com/llvm/llvm-project/compare/main...dtcxzyw:llvm-project:perf/sccp-relax-icmp

https://github.com/llvm/llvm-project/pull/156497