[llvm] [DFAJumpThreading] Enable DFAJumpThread by default. (PR #157646)

[Nikita Popov via llvm-commits]

nikic wrote:

One thing that I am wondering about is the position of the pass. It's currently in the function simplification pipeline, but I'm not sure whether this is the right position. It might make more sense to perform it as part of the optimization rather than simplification pipeline. But think doesn't need to block the default enablement, we can always adjust the position later.

https://github.com/llvm/llvm-project/pull/157646