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

[Nikita Popov via llvm-commits]

nikic wrote:

> After effort on reducing compile-time, we get a better number: https://llvm-compile-time-tracker.com/compare.php?from=ed113e7904943565b4cd05588f6b639e40187510&to=2b901ca2e1b77d2b7a31cbcb57a921aa662341f9&stat=instructions:u. @nikic, are you satisfied with the current compile-time?

Yeah, those results look great.

I also started a compile-time run on llvm-opt-benchmark with these results: https://github.com/dtcxzyw/llvm-opt-benchmark/pull/2906#issuecomment-3377606148 If you have time, looking at the big outlier there (openssl/smime.ll with +175%) would be good.

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