[llvm] Reapply "[DFAJumpThreading] Enable DFAJumpThread by default." (PR #169183)

[Aiden Grossman via llvm-commits]

boomanaiden154 wrote:

I am seeing some failures that look like miscompiles still. No crashes from what I've seen yet, and there were one or two before.

I'll try and spend some time debugging tomorrow, along with digging through the rest of the results. The one failure I've seen so far is in https://github.com/google/xls in `partial_ops_test` if anyone else wants to try and take a stab at it before I get to it.

https://github.com/llvm/llvm-project/pull/169183