[llvm] [NFC] Replace uses of ConstantExpr::getCompare. (PR #91558)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

This is basically fine, but please use ConstantFoldCompareInstOperands instead of ConstantFoldCompareInstruction. The latter should essentially be considered a private API.

https://github.com/llvm/llvm-project/pull/91558