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

[Nikita Popov via llvm-commits]

nikic wrote:

Compile-time: https://llvm-compile-time-tracker.com/compare.php?from=d685508bec02a676383b284d268fe8a2e4cbf7f3&to=ba220372f5c68b12c15ce2efbccf4edc9ea300f1&stat=instructions:u

Generally looks okay, with some outliers (libclamav_nsis_LZMADecode.c +95%, NativeInlineSiteSymbol.cpp +33%). These might be fine assuming the increase is due to unavoidable second order effects from the transformation being performed.

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