vtable-linkage.cpp revision 891c8b739917ec4d171a62ceaefc640115089e7d 
1// RUN: clang-cc %s -triple=x86_64-apple-darwin10 -emit-llvm -o - | FileCheck %s
2
3namespace {
4  struct A {
5    virtual void f() { }
6  };
7}
8
9void f() { A b; }
10
11struct B {
12  B();
13  virtual void f();
14};
15
16B::B() { }
17
18struct C {
19  C();
20  virtual void f() { }
21};
22
23C::C() { }
24
25// B has a key function that is not defined in this translation unit so its vtable
26// has external linkage.
27// CHECK: @_ZTV1B = external constant
28
29// C has no key function, so its vtable should have weak_odr linkage.
30// CHECK: @_ZTV1C = weak_odr constant
31
32// The A vtable should have internal linkage since it is inside an anonymous
33// namespace.
34// CHECK: @_ZTVN12_GLOBAL__N_11AE = internal constant
35