[clang] [clang] ODR hashes depth+index and not name of TemplateTypeParm (PR #144796)

[Ilya Biryukov via cfe-commits]

https://github.com/ilya-biryukov requested changes to this pull request.

Thanks, I believe we've seen some related breakages in the past and had to workaround the module structure because of this. It would definitely save some cycles for us in the future!

My only request is to keep this change focused on fixing the particular issue and split the variadics into a separate one.

https://github.com/llvm/llvm-project/pull/144796