From 98499013bd70ec584f4c01c45106ec3e8203f16c Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Tue, 31 Jul 2012 19:02:02 +0000
Subject: [PATCH] Consider the visibility of template template arguments. GCC
 doesn't, but it also fails to consider the linkage, which we were already
 considering.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161070 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/AST/Decl.cpp               |  4 ++++
 test/CodeGenCXX/visibility.cpp | 18 ++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/lib/AST/Decl.cpp b/lib/AST/Decl.cpp
index c98853adec..d5b0be3ba4 100644
--- a/lib/AST/Decl.cpp
+++ b/lib/AST/Decl.cpp
@@ -710,6 +710,10 @@ llvm::Optional<Visibility> NamedDecl::getExplicitVisibility() const {
   if (llvm::Optional<Visibility> V = getVisibilityOf(this))
     return V;
 
+  // The visibility of a template is stored in the templated decl.
+  if (const TemplateDecl *TD = dyn_cast<TemplateDecl>(this))
+    return getVisibilityOf(TD->getTemplatedDecl());
+
   // If there wasn't explicit visibility there, and this is a
   // specialization of a class template, check for visibility
   // on the pattern.
diff --git a/test/CodeGenCXX/visibility.cpp b/test/CodeGenCXX/visibility.cpp
index d2f58f968d..014503911a 100644
--- a/test/CodeGenCXX/visibility.cpp
+++ b/test/CodeGenCXX/visibility.cpp
@@ -1094,3 +1094,21 @@ namespace test59 {
     // CHECK-HIDDEN: define linkonce_odr hidden void @_ZN6test594testIXadL_ZNS_1fEvEEXadL_ZNS_1gEvEEEEvv
   }
 }
+
+namespace test60 {
+  template<int i>
+  class __attribute__((visibility("hidden"))) a {};
+  template<int i>
+  class __attribute__((visibility("default"))) b {};
+  template<template<int> class x, template<int> class y>
+  void test() {}
+  void use() {
+    test<a, b>();
+    // CHECK: define linkonce_odr hidden void @_ZN6test604testINS_1aENS_1bEEEvv
+    // CHECK-HIDDEN: define linkonce_odr hidden void @_ZN6test604testINS_1aENS_1bEEEvv
+
+    test<b, a>();
+    // CHECK: define linkonce_odr hidden void @_ZN6test604testINS_1bENS_1aEEEvv
+    // CHECK-HIDDEN: define linkonce_odr hidden void @_ZN6test604testINS_1bENS_1aEEEvv
+  }
+}
-- 
2.40.0