[clang] Thread Safety Analysis: Improved pointer handling (PR #127396)

[via cfe-commits]

aoates wrote:

As an additional data point --- I patched in these commits and have been testing with them on my C codebase and
a) so far I have no found any false positives
b) it has made a _huge_ difference in the effectiveness of TSA

I'm a strong supporter of this independent of the Linux kernel annotation work (which is, of course, also awesome).

https://github.com/llvm/llvm-project/pull/127396