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

[Utkarsh Saxena via cfe-commits]

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@@ -93,6 +93,9 @@ class FactsGenerator : public ConstStmtVisitor<FactsGenerator> {
   FactManager &FactMgr;
   AnalysisDeclContext &AC;
   llvm::SmallVector<Fact *> CurrentBlockFacts;
+  // Collect origins that escape the function in this block. These are handled
+  // at the end of the block to ensure `OEFs` appear after `Expire` facts.
+  llvm::SmallVector<Fact *> EscapesInCurrentBlock;
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usx95 wrote:

we can be more precise and explicit about the intention `llvm::SmallVector< OriginEscapesFact *>`

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