[llvm] [JumpThreading] Limit number of free instructions (PR #75671)

[Nick Terrell via llvm-commits]

terrelln wrote:

@aeubanks I believe that these intrinsics are considered free in this context:

https://github.com/llvm/llvm-project/blob/aaa3f72c1ce6e1757df79c0d02e0675201ee07a3/llvm/include/llvm/Analysis/TargetTransformInfoImpl.h#L719

https://github.com/llvm/llvm-project/pull/75671