clang/test/CodeGenCXX/mingw-template-dllexport.cpp

   1 // RUN: %clang_cc1 -emit-llvm -triple i686-mingw32 %s -o - | FileCheck %s
   2
   3 #define JOIN2(x, y) x##y
   4 #define JOIN(x, y) JOIN2(x, y)
   5 #define UNIQ(name) JOIN(name, __LINE__)
   6 #define USEMEMFUNC(class, func) void (class::*UNIQ(use)())() { return &class::func; }
   7
   8 template <class T>
   9 class c {
  10   void f() {}
  11 };
  12
  13 template class __declspec(dllexport) c<int>;
  14
  15 // CHECK: define {{.*}} dllexport {{.*}} @_ZN1cIiE1fEv
  16
  17 extern template class __declspec(dllexport) c<char>;
  18 template class c<char>;
  19
  20 // CHECK: define {{.*}} dllexport {{.*}} @_ZN1cIcE1fEv
  21
  22 extern template class c<double>;
  23 template class __declspec(dllexport) c<double>;
  24
  25 // CHECK-NOT: define {{.*}} dllexport {{.*}} @_ZN1cIdE1fEv
  26
  27 template <class T>
  28 struct outer {
  29   void f();
  30   struct inner {
  31     void f();
  32   };
  33 };
  34
  35 template <class T> void outer<T>::f() {}
  36 template <class T> void outer<T>::inner::f() {}
  37
  38 template class __declspec(dllexport) outer<int>;
  39
  40 // CHECK: define {{.*}} dllexport {{.*}} @_ZN5outerIiE1fEv
  41 // CHECK-NOT: define {{.*}} dllexport {{.*}} @_ZN5outerIiE5inner1fEv
  42
  43 extern template class __declspec(dllimport) outer<char>;
  44 USEMEMFUNC(outer<char>, f)
  45 USEMEMFUNC(outer<char>::inner, f)
  46
  47 // CHECK: declare dllimport {{.*}} @_ZN5outerIcE1fEv
  48 // CHECK: define {{.*}} @_ZN5outerIcE5inner1fEv