[clang] Patch series to reapply #118734 and substantially improve it (PR #120534)

[via cfe-commits]

dyung wrote:

> Is there any hope of upgrading MSVC? I know you were looking at that, but not sure what progress happened there.

I didn't go through with it and was hoping you would be able to find a work-around. I'll start talking to people to try and do a stop-gap update to a later version of VS2019 and let you know if/when we have deployed it. (I will be updating our upstream build bot as well at the same time).

https://github.com/llvm/llvm-project/pull/120534