[llvm] IR: introduce ICmpInst::isImpliedByMatchingCmp (PR #122597)

[Yingwei Zheng via llvm-commits]

https://github.com/dtcxzyw approved this pull request.

Please add some positive tests (this patch is not a NFC).
You can extract tests from https://github.com/dtcxzyw/llvm-opt-benchmark/pull/1956/files.


https://github.com/llvm/llvm-project/pull/122597