[llvm] [llvm][Dwarf] Add LanguageDescription API that accounts for version (PR #162048)

[Michael Buch via llvm-commits]

Michael137 wrote:

> Be good to have some test coverage - either as a unit test, or if there's some useful way to render this data in llvm-dwarfdump, even better.

Added unittests in latest commit. Testing using dwarfdump wouldn't work yet because we don't emit version names yet in LLVM (LLDB synthesizes them from the `DW_LANG_` codes). Once we implement the DWARFv6 language version scheme (which I'm currently doing but don't have anything to review yet), we could test this further.

https://github.com/llvm/llvm-project/pull/162048