[clang] Thread Safety Analysis: Compare values of literals (PR #148551)

[Marco Elver via cfe-commits]

https://github.com/melver approved this pull request.

I completely forgot this PR was still not submitted.

I suppose it supersedes my attempt: https://github.com/llvm/llvm-project/pull/179041 ?

https://github.com/llvm/llvm-project/pull/148551