test/CodeGenCXX/template-linkage.cpp

   1 // RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm -o - | FileCheck %s
   2 template<typename T> struct A {
   3   virtual void f(T) { }
   4   inline void g() { }
   5 };
   6
   7 // Explicit instantiations have external linkage.
   8
   9 // CHECK: define weak_odr void @_ZN1AIiE1gEv(
  10 template void A<int>::g();
  11
  12 // CHECK: define weak_odr void @_ZN1AIfE1fEf(
  13 // CHECK: define weak_odr void @_ZN1AIfE1gEv(
  14 // FIXME: This should also emit the vtable.
  15 template struct A<float>;
  16
  17 // CHECK: define weak_odr void @_Z1fIiEvT_
  18 template <typename T> void f(T) { }
  19 template void f<int>(int);
  20
  21 // CHECK: define weak_odr void @_Z1gIiEvT_
  22 template <typename T> inline void g(T) { }
  23 template void g<int>(int);
  24
  25 template<typename T>
  26 struct X0 {
  27   virtual ~X0() { }
  28 };
  29
  30 template<typename T>
  31 struct X1 : X0<T> {
  32   virtual void blarg();
  33 };
  34
  35 template<typename T> void X1<T>::blarg() { }
  36
  37 extern template struct X0<char>;
  38 extern template struct X1<char>;
  39
  40 // CHECK: define linkonce_odr void @_ZN2X1IcED1Ev(
  41 void test_X1() {
  42   X1<char> i1c;
  43 }
  44