path: root/test/CodeGenCXX/visibility.cpp

// RUN: %clang_cc1 %s -std=c++11 -triple=x86_64-apple-darwin10 -emit-llvm -o - | FileCheck %s
// RUN: %clang_cc1 %s -std=c++11 -triple=x86_64-apple-darwin10 -fvisibility hidden -emit-llvm -o - | FileCheck %s -check-prefix=CHECK-HIDDEN

#define HIDDEN __attribute__((visibility("hidden")))
#define PROTECTED __attribute__((visibility("protected")))
#define DEFAULT __attribute__((visibility("default")))

namespace test30 {
  // When H is hidden, it should make X hidden, even if the template argument
  // is not.
  struct H {
  };
  template<H *T>
  struct X {
  };
  H DEFAULT a;
  X<&a> b;
  // CHECK: _ZN6test301bE = global
  // CHECK-HIDDEN: _ZN6test301bE = hidden global
}

namespace test25 {
  template<typename T>
  struct X {
    template<typename U>
    struct definition {
    };
  };

  class DEFAULT A { };

  X<int>::definition<A> a;
  // CHECK: @_ZN6test251aE = global
  // CHECK-HIDDEN: @_ZN6test251aE = hidden global
}

namespace test28 {
  class DEFAULT foo {
  };
  foo myvec;
  // CHECK: @_ZN6test285myvecE = global
  // CHECK-HIDDEN: @_ZN6test285myvecE = hidden global
}

namespace test29 {
#pragma GCC visibility push(hidden)
  struct RECT {
    int top;
  };
  __attribute__ ((visibility ("default"))) extern RECT data_rect;
  RECT data_rect = { -1};
#pragma GCC visibility pop
  // CHECK: @_ZN6test299data_rectE = global
  // CHECK-HIDDEN: @_ZN6test299data_rectE = global
}

namespace test40 {
  template<typename T>
  struct foo {
    DEFAULT static int bar;
  };
  template<typename T>
  int foo<T>::bar;
  template struct foo<int>;
  // CHECK: _ZN6test403fooIiE3barE = weak_odr global
  // CHECK-HIDDEN: _ZN6test403fooIiE3barE = weak_odr global
}

namespace test41 {
  // Unlike gcc we propagate the information that foo not only is hidden, but
  // has been explicitly marked as so. This lets us produce a hidden undefined
  // reference to bar.
  struct __attribute__((visibility("hidden"))) foo {};
  extern foo bar;
  foo *zed() {
    return &bar;
  }
  // CHECK: @_ZN6test413barE = external hidden global
  // CHECK-HIDDEN: @_ZN6test413barE = external hidden global
}

namespace test48 {
  // Test that we use the visibility of struct foo when instantiating the
  // template. Note that is a case where we disagree with gcc, it produces
  // a default symbol.
  struct HIDDEN foo {
  };
  DEFAULT foo x;

  struct bar {
    template<foo *z>
    struct zed {
    };
  };

  bar::zed<&x> y;
  // CHECK: _ZN6test481yE = hidden global
  // CHECK-HIDDEN: _ZN6test481yE = hidden global
}

// CHECK: @_ZN5Test425VariableInHiddenNamespaceE = hidden global i32 10
// CHECK: @_ZN5Test71aE = hidden global
// CHECK: @_ZN5Test71bE = global
// CHECK: @test9_var = global
// CHECK-HIDDEN: @test9_var = global
// CHECK: @_ZN6Test121A6hiddenE = external hidden global
// CHECK: @_ZN6Test121A7visibleE = external global
// CHECK-HIDDEN: @_ZN6Test121A6hiddenE = external hidden global
// CHECK-HIDDEN: @_ZN6Test121A7visibleE = external global
// CHECK: @_ZN6Test131B1aE = hidden global
// CHECK: @_ZN6Test131C1aE = global
// CHECK-HIDDEN: @_ZN6Test131B1aE = hidden global
// CHECK-HIDDEN: @_ZN6Test131C1aE = global
// CHECK: @_ZN6Test143varE = external global
// CHECK-HIDDEN: @_ZN6Test143varE = external global
// CHECK: @_ZN6Test154TempINS_1AEE5Inner6bufferE = external global [0 x i8]
// CHECK-HIDDEN: @_ZN6Test154TempINS_1AEE5Inner6bufferE = external global [0 x i8]

namespace test27 {
  template<typename T>
  class C {
    class __attribute__((visibility("default"))) D {
      void f();
    };
  };

  template<>
  class C<int>::D {
    virtual void g();
  };

  void C<int>::D::g() {
  }
  // CHECK: _ZTVN6test271CIiE1DE = unnamed_addr constant
  // CHECK-HIDDEN: _ZTVN6test271CIiE1DE = unnamed_addr constant
}

// CHECK: @_ZZN6Test193fooIiEEvvE1a = linkonce_odr global
// CHECK: @_ZGVZN6Test193fooIiEEvvE1a = linkonce_odr global i64
// CHECK-HIDDEN: @_ZZN6Test193fooIiEEvvE1a = linkonce_odr hidden global
// CHECK-HIDDEN: @_ZGVZN6Test193fooIiEEvvE1a = linkonce_odr hidden global i64
// CHECK-HIDDEN: @_ZTVN6Test161AIcEE = external unnamed_addr constant
// CHECK-HIDDEN: @_ZTTN6Test161AIcEE = external unnamed_addr constant
// CHECK: @_ZTVN5Test63fooE = linkonce_odr hidden unnamed_addr constant 

namespace Test1 {
  // CHECK: define hidden void @_ZN5Test11fEv
  void HIDDEN f() { }
  
}

namespace Test2 {
  struct HIDDEN A {
    void f();
  };

  // A::f is a member function of a hidden class.
  // CHECK: define hidden void @_ZN5Test21A1fEv
  void A::f() { }
}
 
namespace Test3 {
  struct HIDDEN A {
    struct B {
      void f();
    };
  };

  // B is a nested class where its parent class is hidden.
  // CHECK: define hidden void @_ZN5Test31A1B1fEv
  void A::B::f() { }  
}

namespace Test4 HIDDEN {
  int VariableInHiddenNamespace = 10;

  // Test4::g is in a hidden namespace.
  // CHECK: define hidden void @_ZN5Test41gEv
  void g() { } 
  
  struct DEFAULT A {
    void f();
  };
  
  // A has default visibility.
  // CHECK: define void @_ZN5Test41A1fEv
  void A::f() { } 
}

namespace Test5 {

  namespace NS HIDDEN {
    // f is in NS which is hidden.
    // CHECK: define hidden void @_ZN5Test52NS1fEv()
    void f() { }
  }
  
  namespace NS {
    // g is in NS, but this NS decl is not hidden.
    // CHECK: define void @_ZN5Test52NS1gEv
    void g() { }
  }
}

// <rdar://problem/8091955>
namespace Test6 {
  struct HIDDEN foo