[llvm] [InstCombine] Avoid infinite loop in `foldSelectValueEquivalence` (PR #142754)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

Compile-time improvement: https://llvm-compile-time-tracker.com/compare.php?from=7e1fa09ce2a228c949ce4490c98f2c73ed8ada00&to=0d9b39884236fce8387d64e806985777664155b9&stat=instructions:u


https://github.com/llvm/llvm-project/pull/142754