[clang] Diagnose misuse of the cleanup attribute (PR #80040)

[Erich Keane via cfe-commits]

================
@@ -3780,6 +3780,30 @@ static void handleCleanupAttr(Sema &S, Decl *D, const ParsedAttr &AL) {
       << NI.getName() << ParamTy << Ty;
     return;
   }
+  VarDecl *VD = cast<VarDecl>(D);
+  // Create a reference to the variable declaration. This is a fake/dummy
+  // reference.
+  DeclRefExpr *VariableReference = DeclRefExpr::Create(
+      S.Context, NestedNameSpecifierLoc{}, SourceLocation{Loc}, VD, false,
+      DeclarationNameInfo{VD->getDeclName(), VD->getLocation()}, VD->getType(),
+      VK_LValue);
+
+  // Create a unary operator expression that represents taking the address of
+  // the variable. This is a fake/dummy expression.
+  Expr *AddressOfVariable = UnaryOperator::Create(
+      S.Context, VariableReference, UnaryOperatorKind::UO_AddrOf,
+      S.Context.getPointerType(VD->getType()), VK_PRValue, OK_Ordinary,
+      SourceLocation{Loc}, false, FPOptionsOverride{});
+
+  // Create a function call expression. This is a fake/dummy call expression.
+  CallExpr *FunctionCallExpression = CallExpr::Create(
+      S.Context, E, ArrayRef{AddressOfVariable}, S.Context.VoidTy, VK_PRValue,
+      SourceLocation{Loc}, FPOptionsOverride{});
----------------
erichkeane wrote:

```suggestion
      Loc, FPOptionsOverride{});
```

https://github.com/llvm/llvm-project/pull/80040