[llvm] EarlyCSE: fix CmpPredicate duplicate-hashing (PR #119902)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

This looks good to me, but should add a test? You can probably use `-earlycse-debug-hash` to produce a minimal test case.

https://github.com/llvm/llvm-project/pull/119902