[llvm] [BasicBlockUtils] Remove redundant llvm.dbg instructions after blocks to reduce compile time (PR #89069)

[Florian Hahn via llvm-commits]

fhahn wrote:


> Please also add a loop-unroll test based on the issue.

@coderchenlin I might have missed it somewhere, but is it possible add a loop-unroll test based on the reproducer from https://github.com/llvm/llvm-project/issues/89073?

https://github.com/llvm/llvm-project/pull/89069