For dllexport class templates, export specializations of member functions (PR34849) (take 2)

This is a re-commit of r315025, but making sure to only apply this to
specializations of class template member functions; i.e. not when the function
itself is a template.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@315330 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 15 insertions, 0 deletions

diff --git a/test/CodeGenCXX/dllexport.cpp b/test/CodeGenCXX/dllexport.cpp
index bdef2eb06e..1c96de9b6c 100644
--- a/test/CodeGenCXX/dllexport.cpp
+++ b/test/CodeGenCXX/dllexport.cpp
@@ -831,6 +831,21 @@ template <typename T> struct ExplicitInstantiationTwoAttributes { void f() {} };
 template struct __declspec(dllexport) __declspec(dllimport) ExplicitInstantiationTwoAttributes<int>;
 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?f@?$ExplicitInstantiationTwoAttributes@H@@QAEXXZ"
 
+namespace pr34849 {
+// Specializations of exported class template member functions get exported.
+template <typename> struct __declspec(dllexport) ExportedClassTemplate { void foo(); };
+template<> void ExportedClassTemplate<int>::foo() {}
+template struct ExportedClassTemplate<int>;
+// M32-DAG: define dllexport x86_thiscallcc void @"\01?foo@?$ExportedClassTemplate@H@pr34849@@QAEXXZ"
+
+// Specializations of exported class member template functions do not get exported.
+struct __declspec(dllexport) ExportedClass { template <typename> void bar() ; };
+template<> void ExportedClass::bar<int>() {}
+// M32-DAG: define x86_thiscallcc void @"\01??$bar@H@ExportedClass@pr34849@@QAEXXZ"
+template <typename> struct __declspec(dllexport) ExportedClassTemplate2 { template <typename> void baz(); };
+template<> template<> void ExportedClassTemplate2<int>::baz<int>() {}
+// M32-DAG: define x86_thiscallcc void @"\01??$baz@H@?$ExportedClassTemplate2@H@pr34849@@QAEXXZ"
+}
 
 //===----------------------------------------------------------------------===//
 // Classes with template base classes