llvm-project/clang/test/CodeGenCXX/devirtualize-virtual-function-calls-final.cpp

// RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s

namespace Test1 {
  struct A {
    virtual int f() final;
  };

  // CHECK: define i32 @_ZN5Test11fEPNS_1AE
  int f(A *a) {
    // CHECK: call i32 @_ZN5Test11A1fEv
    return a->f();
  }
}

namespace Test2 {
  struct A final {
    virtual int f();
  };

  // CHECK: define i32 @_ZN5Test21fEPNS_1AE
  int f(A *a) {
    // CHECK: call i32 @_ZN5Test21A1fEv
    return a->f();
  }
}

namespace Test3 {
  struct A {
    virtual int f();
  };

  struct B final : A { };

  // CHECK: define i32 @_ZN5Test31fEPNS_1BE
  int f(B *b) {
    // CHECK: call i32 @_ZN5Test31A1fEv
    return b->f();
  }

  // CHECK: define i32 @_ZN5Test31fERNS_1BE
  int f(B &b) {
    // CHECK: call i32 @_ZN5Test31A1fEv
    return b.f();
  }

  // CHECK: define i32 @_ZN5Test31fEPv
  int f(void *v) {
    // CHECK: call i32 @_ZN5Test31A1fEv
    return static_cast<B*>(v)->f();
  }
}