Enable DLL attribute propagation on explicit instantiation definitions (PR23770)

This is a follow-up to r225570 which enabled adding DLL attributes when a
class template goes from explicit instantiation declaration to explicit
instantiation definition.

llvm-svn: 239375

2 files changed, 11 insertions, 0 deletions

diff --git a/clang/test/CodeGenCXX/dllexport.cpp b/clang/test/CodeGenCXX/dllexport.cpp
index 3795cbcbee6..477e7dcf0b5 100644
--- a/clang/test/CodeGenCXX/dllexport.cpp
+++ b/clang/test/CodeGenCXX/dllexport.cpp
@@ -707,6 +707,11 @@ void PR23308::f(InternalLinkageType*) {}
 long use(PR23308* p) { p->f(nullptr); }
 // M32-DAG: define internal x86_thiscallcc void @"\01?f@PR23308@@QAEXPAUInternalLinkageType@?A@@@Z"
 
+template <typename T> struct PR23770BaseTemplate { void f() {} };
+template <typename T> struct PR23770DerivedTemplate : PR23770BaseTemplate<int> {};
+extern template struct PR23770DerivedTemplate<int>;
+template struct __declspec(dllexport) PR23770DerivedTemplate<int>;
+// M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?f@?$PR23770BaseTemplate@H@@QAEXXZ"
 
 
 //===----------------------------------------------------------------------===//
diff --git a/clang/test/CodeGenCXX/dllimport.cpp b/clang/test/CodeGenCXX/dllimport.cpp
index 9e3813e5e1b..0f15ff0291b 100644
--- a/clang/test/CodeGenCXX/dllimport.cpp
+++ b/clang/test/CodeGenCXX/dllimport.cpp
@@ -741,6 +741,12 @@ USEMEMFUNC(ExplicitInstantiationDeclExportedDefImportedTemplate<int>, f);
 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"\01?f@?$ExplicitInstantiationDeclExportedDefImportedTemplate@H@@QAEXXZ"
 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc %struct.ExplicitInstantiationDeclExportedDefImportedTemplate* @"\01??0?$ExplicitInstantiationDeclExportedDefImportedTemplate@H@@QAE@XZ"
 
+template <typename T> struct PR23770BaseTemplate { void f() {} };
+template <typename T> struct PR23770DerivedTemplate : PR23770BaseTemplate<int> {};
+extern template struct PR23770DerivedTemplate<int>;
+template struct __declspec(dllimport) PR23770DerivedTemplate<int>;
+USEMEMFUNC(PR23770BaseTemplate<int>, f);
+// M32-DAG: declare dllimport x86_thiscallcc void @"\01?f@?$PR23770BaseTemplate@H@@QAEXXZ"
 
 //===----------------------------------------------------------------------===//
 // Classes with template base classes