[clang] [LifetimeSafety] Detect use-after-return (PR #165370)

[Kashika Akhouri via cfe-commits]

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@@ -120,6 +144,14 @@ class AnalysisImpl
                                LivenessInfo(&UF, LivenessKind::Must)));
   }
 
+  // A return operation makes the origin live with definite confidence, as it
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kashika0112 wrote:

Done

https://github.com/llvm/llvm-project/pull/165370