[llvm] [DFAJumpThreading] Constraint the number of cloned instructions (PR #161632)

[Usman Nadeem via llvm-commits]

UsmanNadeem wrote:

How many transformations are restricted by this (would it be possible to check stats on the test suite)? I fear that restricting possibly beneficial transformations to avoid second-order effects might not be the best way forward.

https://github.com/llvm/llvm-project/pull/161632