[clang] [LifetimeSafety] Analyze synthesized constructors for dangling NSDMIs (PR #206375)

[Utkarsh Saxena via cfe-commits]

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@@ -3005,6 +3010,51 @@ void clang::sema::AnalysisBasedWarnings::IssueWarnings(
     LifetimeSafetyTUAnalysis(S, TU, LSStats);
 }
 
+void clang::sema::AnalysisBasedWarnings::
+    IssueLifetimeSafetyWarningsForImplicitFunction(const Decl *D) {
+  if (!D || !D->getBody())
+    return;
+  // TU-end analysis reaches such definitions via its own call-graph walk; only
+  // handle the per-function mode here. The remaining guards mirror
+  // IssueWarnings.
+  if (S.getLangOpts().EnableLifetimeSafetyTUAnalysis ||
+      !S.getLangOpts().CPlusPlus || !lifetimes::IsLifetimeSafetyEnabled(S, D))
+    return;
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usx95 wrote:

I think `lifetimes::IsLifetimeSafetyEnabled` alone should be able to handle this. E.g. if `EnableLifetimeSafetyTUAnalysis` is true, it returns true only for TUDecls. Also takes care of language enablement.

https://github.com/llvm/llvm-project/pull/206375