[clang] nonblocking/nonallocating attributes: 2nd pass caller/callee analysis (PR #99656)

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Sirraide wrote:

> I also agree that documentation is wanting. I will look into expanding this, whether in the general attributes documentation or a new page (I'm speaking from a rusty memory of precedents, will go explore).

We have a separate page for e.g. `nonnull` and friends; effects feel like a ‘big enough’ feature to warrant a separate page too imo; I’m not too familiar with where all of that is though unfortunately.

Also, imo that can also be a separate pr; this one is already big enough.



https://github.com/llvm/llvm-project/pull/99656