clang/test/CodeGenCXX/dllimport-template-sdm.cpp

   1 // RUN: %clang_cc1 -triple x86_64-windows-msvc -emit-llvm -std=c++14 -fms-extensions -o - %s | FileCheck %s --check-prefix=IMPORT
   2 // RUN: %clang_cc1 -triple x86_64-windows-msvc -emit-llvm -std=c++14 -fms-extensions -o - %s -DTEST_EXPORT | FileCheck %s --check-prefix=EXPORT
   3
   4 #ifndef TEST_EXPORT
   5 #define DLLATTR __declspec(dllimport)
   6 #else
   7 #define DLLATTR __declspec(dllexport)
   8 #endif
   9
  10 // PR37232: When a dllimport attribute is propagated from a derived class to a
  11 // base class that happens to be a template specialization, it is only applied
  12 // to template *methods*, and not static data members. If a dllexport attribute
  13 // is propagated, it still applies to static data members.
  14
  15 // IMPORT-DAG: @"?sdm@Exporter@@2HB" = available_externally dllimport constant i32 2, align 4
  16 // IMPORT-DAG: @"?csdm@?$A@H@@2HB" = linkonce_odr dso_local constant i32 2, comdat, align 4
  17 // IMPORT-DAG: @"?sdm@?$A@H@@2HA" = linkonce_odr dso_local global i32 1, comdat, align 4
  18 // IMPORT-DAG: @"?sdm@?$B@H@@2HB" = available_externally dllimport constant i32 2, align 4
  19 // IMPORT-DAG: @"?sdm@?$C@H@@2HB" = available_externally dllimport constant i32 2, align 4
  20
  21 // EXPORT-DAG: @"?sdm@Exporter@@2HB" = weak_odr dso_local dllexport constant i32 2, comdat, align 4
  22 // EXPORT-DAG: @"?csdm@?$A@H@@2HB" = weak_odr dso_local dllexport constant i32 2, comdat, align 4
  23 // EXPORT-DAG: @"?sdm@?$A@H@@2HA" = weak_odr dso_local dllexport global i32 1, comdat, align 4
  24 // EXPORT-DAG: @"?sdm@?$B@H@@2HB" = weak_odr dso_local dllexport constant i32 2, comdat, align 4
  25 // EXPORT-DAG: @"?sdm@?$C@H@@2HB" = weak_odr dso_local dllexport constant i32 2, comdat, align 4
  26
  27
  28 template <typename T> struct A {
  29   static constexpr int csdm = 2;
  30   static int sdm;
  31 };
  32 template <typename T> int A<T>::sdm = 1;
  33
  34 struct DLLATTR Exporter : A<int> {
  35   static constexpr int sdm = 2;
  36 };
  37
  38 template <typename T> struct DLLATTR B { static constexpr int sdm = 2; };
  39
  40 template <typename T> struct DLLATTR C;
  41 template <typename T> struct C { static constexpr int sdm = 2; };
  42
  43 void takeRef(const int &_Args) {}
  44
  45 int main() {
  46   takeRef(Exporter::sdm);
  47   takeRef(A<int>::csdm);
  48   takeRef(A<int>::sdm);
  49   takeRef(B<int>::sdm);
  50   takeRef(C<int>::sdm);
  51
  52   return 1;
  53 }