llvm-project/clang/test/SemaCXX/attr-notail.cpp

// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
// expected-no-diagnostics

class Base {
public:
  [[clang::not_tail_called]] virtual int foo1();
  virtual int foo2();
  [[clang::not_tail_called]] int foo3();
  virtual ~Base() {}
};

class Derived1 : public Base {
public:
  int foo1() override;
  [[clang::not_tail_called]] int foo2() override;
  [[clang::not_tail_called]] int foo4();
};