[clang] Thread Safety Analysis: Don't warn at joins that re-branch on a try-lock result (PR #209796)

[Marco Elver via cfe-commits]

melver wrote:

Thanks for sending the PR - give me a few days to take a deeper look as I'm traveling right now.

Side note, the LLVM Github workflow ends up squashing all commits into a single one that is merged (so you can just add more commits for fixups), and the PR description becoming the final commit message - so you can just move all the description into the PR description. It's a little different to how we do things in the kernel, but it is what it is: https://llvm.org/docs/GitHub.html

https://github.com/llvm/llvm-project/pull/209796