Chuanqi Xu 6345b009c3 [C++20] [Modules] Add mangling number for lambda in non-internal module unit context ...

Close https://github.com/llvm/llvm-project/issues/59513
Close https://github.com/llvm/llvm-project/issues/110146

As we discussed, this is related to ABI:
https://github.com/itanium-cxx-abi/cxx-abi/issues/186

I was intending to fix this after it gets merged into the ItaniumC++ABI
formally. But it looks like ItaniumC++ABI doesn't update it yet and
there are more issue reports for it.

Luckily Richard had a clear direction guide here though. So I think it
should be good to do this without a formal ItaniumC++ABI wording.

The diff of the patch is slightly larger than it was by a simple
refacoration to simple the control flow a little bit.

2025-03-13 15:04:06 +08:00

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