[clang] Supports viewing class member variables in lambda when using the vs debugger (PR #71564)

[Zequan Wu via cfe-commits]

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+// RUN: %clang_cl --target=x86_64-windows-msvc /c /Z7 -o %t.obj -- %s
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ZequanWu wrote:

I think you are missing `-gcodeview` in the command line to emit the debug info. The change should reflect on a metadata. `llvm/test/DebugInfo/COFF` is the place to test the phase when IR being lowered to object file.  `clang/test/CodeGenCXX` is for testing C++ code to IR.

https://github.com/llvm/llvm-project/pull/71564