[llvm] [llvm][DebugInfo] Add support for DW_OP_GNU_implicit_pointer (PR #142913)

[via llvm-commits]

Thrrreeee wrote:

> Pushed [bc7f1ea](https://github.com/llvm/llvm-project/commit/bc7f1eadbf8bd3377d8fa121f3b6072ec7601724) hopefully that's enough for now.

Thanks!

https://github.com/llvm/llvm-project/pull/142913