[clang] [LifetimeSafety] Add suggestion and inference for implicit this (PR #176703)

[Gábor Horváth via cfe-commits]

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@@ -610,10 +610,18 @@ void FactsGenerator::markUseAsWrite(const DeclRefExpr *DRE) {
 // parameter at the function's entry.
 llvm::SmallVector<Fact *> FactsGenerator::issuePlaceholderLoans() {
   const auto *FD = dyn_cast<FunctionDecl>(AC.getDecl());
-  if (!FD)
+  if (!FD || FD->isImplicit())
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Xazax-hun wrote:

I actually wonder if we should move the `implicit` checking somewhere earlier? It is not only we do not want to emit these warnings for implicit functions but we actually might not even want to run the analysis on implicit functions. 

https://github.com/llvm/llvm-project/pull/176703