[llvm] [AllocToken] Introduce AllocToken instrumentation pass (PR #156838)

[Hans Wennborg via llvm-commits]

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+//===- AllocToken.h - Allocation token instrumentation --------------------===//
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zmodem wrote:

With the risk of starting a bikeshed: how about SanitizeAllocToken.h/.cpp, or maybe AllocPartitionSanitizer, or something like that (the pass name might be adjusted too).

Just AllocToken makes it sound like this implements some kind of token, not a sanitizer pass.

https://github.com/llvm/llvm-project/pull/156838