From 5dd34744c5c04fdbbf4d1fb3f00c2502ecc5162f Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Mon, 21 Jun 2010 18:41:26 +0000
Subject: Instantiations subject to an explicit template instantiation
 declaration have default visibility even under -fvisibility=hidden. Fixes
 <rdar://problem/8109763>.

llvm-svn: 106440
---
 clang/lib/CodeGen/CodeGenModule.cpp | 39 ++++++++++++++++++++++++++++++-------
 1 file changed, 32 insertions(+), 7 deletions(-)

(limited to 'clang/lib/CodeGen/CodeGenModule.cpp')

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 28f73d6..a9a55bf 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -23,6 +23,7 @@
 #include "clang/AST/CharUnits.h"
 #include "clang/AST/DeclObjC.h"
 #include "clang/AST/DeclCXX.h"
+#include "clang/AST/DeclTemplate.h"
 #include "clang/AST/RecordLayout.h"
 #include "clang/Basic/Builtins.h"
 #include "clang/Basic/Diagnostic.h"
@@ -151,14 +152,38 @@ CodeGenModule::getDeclVisibilityMode(const Decl *D) const {
       return LangOptions::Protected;
     }
   }
-
-  // If -fvisibility-inlines-hidden was provided, then inline C++ member
-  // functions get "hidden" visibility by default.
-  if (getLangOptions().InlineVisibilityHidden)
-    if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D))
-      if (Method->isInlined())
-        return LangOptions::Hidden;
   
+  if (getLangOptions().CPlusPlus) {
+    // Entities subject to an explicit instantiation declaration get default
+    // visibility.
+    if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) {
+      if (Function->getTemplateSpecializationKind()
+                                        == TSK_ExplicitInstantiationDeclaration)
+        return LangOptions::Default;
+    } else if (const ClassTemplateSpecializationDecl *ClassSpec
+                              = dyn_cast<ClassTemplateSpecializationDecl>(D)) {
+      if (ClassSpec->getSpecializationKind()
+                                        == TSK_ExplicitInstantiationDeclaration)
+        return LangOptions::Default;
+    } else if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D)) {
+      if (Record->getTemplateSpecializationKind()
+                                        == TSK_ExplicitInstantiationDeclaration)
+        return LangOptions::Default;
+    } else if (const VarDecl *Var = dyn_cast<VarDecl>(D)) {
+      if (Var->isStaticDataMember() &&
+          (Var->getTemplateSpecializationKind()
+                                      == TSK_ExplicitInstantiationDeclaration))
+        return LangOptions::Default;
+    }
+
+    // If -fvisibility-inlines-hidden was provided, then inline C++ member
+    // functions get "hidden" visibility by default.
+    if (getLangOptions().InlineVisibilityHidden)
+      if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D))
+        if (Method->isInlined())
+          return LangOptions::Hidden;
+  }
+           
   // This decl should have the same visibility as its parent.
   if (const DeclContext *DC = D->getDeclContext()) 
     return getDeclVisibilityMode(cast<Decl>(DC));
-- 
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