================
@@ -14690,6 +14690,13 @@ void Sema::FinalizeDeclaration(Decl *ThisDecl) {
}
}
+ // The result of __builtin_counted_by_ref cannot be assigned to a variable.
+ // It allows leaking and modification of bounds safety information.
+ if (IsBuiltinCountedByRef(VD->getInit()))
+ Diag(VD->getInit()->getExprLoc(),
+ diag::err_builtin_counted_by_ref_cannot_leak_reference)
+ << VD->getInit()->getSourceRange();
----------------
AaronBallman wrote:
Should we split this off into a helper function like `bool
CheckInvalidBuiltinCountedByRef(const Expr *E);` ?
https://github.com/llvm/llvm-project/pull/116719
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