[lldb] [libclc] [libc] [clang] [compiler-rt] [mlir] [flang] [clang-tools-extra] [libcxx] [lld] [llvm] [libcxxabi] [ELF] Add internal InputFile (PR #78944)

[Fangrui Song via cfe-commits]

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MaskRay wrote:

Hi, do you have more information (like a reproduce tarball) about a `file` that references a file of `InternalKind`? Could it be a patch in your downstream?

If `file` references a file of `InternalKind`, we probably should make it `nullptr` instead. But I don't know a code path where it is the case for the upstream lld.

https://github.com/llvm/llvm-project/pull/78944