[llvm] [llvm-diff] Add Commutativity on BinOp (PR #123314)

[Nikita Popov via llvm-commits]

nikic wrote:

> Would it be interesting to add a flag to `llvm-diff` to be able to run this normalization pass directly before the `DiffEngine`?

That sounds reasonable to me.

https://github.com/llvm/llvm-project/pull/123314