[llvm] [LLVM][Transforms] Correct LoopSimplify unique block placement. (PR #105538)

[Tim Besard via llvm-commits]

maleadt wrote:

The only failure here is LLDB's `Unwind/trap_frame_sym_ctx.test`, which I can reproduce locally, but also happens on main.



https://github.com/llvm/llvm-project/pull/105538