[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;
+
+  DiagnosticsEngine &Diags = S.getDiagnostics();
+  if (Diags.getIgnoreAllWarnings() ||
+      (Diags.getSuppressSystemWarnings() &&
+       S.SourceMgr.isInSystemHeader(D->getLocation())))
+    return;
+  if (cast<DeclContext>(D)->isDependentContext())
+    return;
+  if (S.hasUncompilableErrorOccurred())
+    return;
+
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usx95 wrote:

I think this is also done in `AnalysisBasedWarnings::IssueWarnings`; consider refactoring to a common function.

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