The flag "print-lvi-after-jump-threading" determines if DT and LVI should be preserved in JumpThreading. The default is to disable preservation.
I have concerns with this approach as it requires passes that want to rely on LVI and DT to also understand the conditional nature of JumpThreading. This may complicate work like D34135 .
I am posting it here in case it is useful in profiling compile time deltas.
This patch requires D38558 to be applied first in order to function.