clang/test/CodeGenCXX/template-linkage.cpp

   1 // RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm -o - | FileCheck %s
   2
   3 // CHECK: Outer5Inner{{.*}}localE6memberE = external global
   4
   5 template<typename T> struct A {
   6   virtual void f(T) { }
   7   inline void g() { }
   8 };
   9
  10 // Explicit instantiations have external linkage.
  11
  12 // CHECK-LABEL: define weak_odr void @_ZN1AIiE1gEv(
  13 template void A<int>::g();
  14
  15 // CHECK-LABEL: define weak_odr void @_ZN1AIfE1fEf(
  16 // CHECK-LABEL: define weak_odr void @_ZN1AIfE1gEv(
  17 // FIXME: This should also emit the vtable.
  18 template struct A<float>;
  19
  20 // CHECK-LABEL: define weak_odr void @_Z1fIiEvT_
  21 template <typename T> void f(T) { }
  22 template void f<int>(int);
  23
  24 // CHECK-LABEL: define weak_odr void @_Z1gIiEvT_
  25 template <typename T> inline void g(T) { }
  26 template void g<int>(int);
  27
  28 template<typename T>
  29 struct X0 {
  30   virtual ~X0() { }
  31 };
  32
  33 template<typename T>
  34 struct X1 : X0<T> {
  35   virtual void blarg();
  36 };
  37
  38 template<typename T> void X1<T>::blarg() { }
  39
  40 extern template struct X0<char>;
  41 extern template struct X1<char>;
  42
  43 // CHECK-LABEL: define linkonce_odr void @_ZN2X1IcED1Ev(%struct.X1* {{[^,]*}} %this) unnamed_addr
  44 void test_X1() {
  45   X1<char> i1c;
  46 }
  47
  48 namespace PR14825 {
  49 struct Outer {
  50   template <typename T> struct Inner {
  51     static int member;
  52   };
  53   template <typename T> void Get() {
  54     int m = Inner<T>::member;
  55   }
  56 };
  57
  58 void test() {
  59   struct local {};
  60   Outer o;
  61   typedef void (Outer::*mptr)();
  62   mptr method = &Outer::Get<local>;
  63 }
  64 }