[Clang] nonblocking/nonallocating attributes: 2nd pass caller/callee analysis (#99656) - In Sema, when encountering Decls with function effects needing verification, add them to a vector, DeclsWithEffectsToVerify. - Update AST serialization to include DeclsWithEffectsToVerify. - In AnalysisBasedWarnings, use DeclsWithEffectsToVerify as a work queue, verifying functions with declared effects, and inferring (when permitted and necessary) whether their callees have effects. --------- Co-authored-by: Doug Wyatt <dwyatt@apple.com> Co-authored-by: Sirraide <aeternalmail@gmail.com> Co-authored-by: Erich Keane <ekeane@nvidia.com>
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