From 20831e21ae00ee10e9d9d906f565a66f9fe1d2d1 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Fri, 25 May 2012 15:51:26 +0000
Subject: [PATCH] Consider the linkage for member class templates even when we
 have to ignore the visibility.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157475 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/AST/Decl.cpp               | 20 ++++++++++++++------
 test/CodeGenCXX/visibility.cpp | 17 +++++++++++++++++
 2 files changed, 31 insertions(+), 6 deletions(-)

diff --git a/lib/AST/Decl.cpp b/lib/AST/Decl.cpp
index 979971c7c3..e8d7093a3f 100644
--- a/lib/AST/Decl.cpp
+++ b/lib/AST/Decl.cpp
@@ -546,14 +546,22 @@ static LinkageInfo getLVForClassMember(const NamedDecl *D, bool OnlyTemplate) {
   } else if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D)) {
     if (const ClassTemplateSpecializationDecl *spec
         = dyn_cast<ClassTemplateSpecializationDecl>(RD)) {
+      // Merge template argument/parameter information for member
+      // class template specializations.
+      const TemplateArgumentList &TemplateArgs = spec->getTemplateArgs();
+      LinkageInfo ArgsLV = getLVForTemplateArgumentList(TemplateArgs,
+                                                        OnlyTemplate);
+      TemplateParameterList *TemplateParams =
+        spec->getSpecializedTemplate()->getTemplateParameters();
+      LinkageInfo ParamsLV = getLVForTemplateParameterList(TemplateParams);
       if (shouldConsiderTemplateVis(spec)) {
-        // Merge template argument/parameter information for member
-        // class template specializations.
-        LV.mergeWithMin(getLVForTemplateArgumentList(spec->getTemplateArgs(),
-                                                     OnlyTemplate));
+        LV.mergeWithMin(ArgsLV);
         if (!OnlyTemplate)
-          LV.merge(getLVForTemplateParameterList(
-                      spec->getSpecializedTemplate()->getTemplateParameters()));
+          LV.merge(ParamsLV);
+      } else {
+        LV.mergeLinkage(ArgsLV);
+        if (!OnlyTemplate)
+          LV.mergeLinkage(ParamsLV);
       }
     }
 
diff --git a/test/CodeGenCXX/visibility.cpp b/test/CodeGenCXX/visibility.cpp
index d889684314..17ba33dabe 100644
--- a/test/CodeGenCXX/visibility.cpp
+++ b/test/CodeGenCXX/visibility.cpp
@@ -832,3 +832,20 @@ namespace test44 {
   // CHECK: define internal void @_ZN6test443fooINS_12_GLOBAL__N_13barEEC1Ev
   // CHECK-HIDDEN: define internal void @_ZN6test443fooINS_12_GLOBAL__N_13barEEC1Ev
 }
+
+namespace test45 {
+  template <typename T>
+  struct foo {
+    template <typename T2>
+    struct bar {
+      bar() {};
+    };
+  };
+  namespace {
+    struct zed;
+  }
+  template struct DEFAULT foo<int>::bar<zed>;
+  foo<int>::bar<zed> x;
+  // CHECK: define internal void @_ZN6test453fooIiE3barINS_12_GLOBAL__N_13zedEEC1Ev
+  // CHECK-HIDDEN: define internal void @_ZN6test453fooIiE3barINS_12_GLOBAL__N_13zedEEC1Ev
+}
-- 
2.40.0