From 0de016dbb7c774dce539e6f85023a2e2422ec684 Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Fri, 6 May 2011 23:32:38 +0000
Subject: [PATCH] Implement a minor optimization by not introducing
 declarations into DeclContext's lookup table when they aren't in any
 identifier namespace.

llvm-svn: 131037
---
 clang/lib/AST/DeclBase.cpp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/clang/lib/AST/DeclBase.cpp b/clang/lib/AST/DeclBase.cpp
index 8f3388ee5895..1766d39c1405 100644
--- a/clang/lib/AST/DeclBase.cpp
+++ b/clang/lib/AST/DeclBase.cpp
@@ -1166,10 +1166,10 @@ void DeclContext::makeDeclVisibleInContextImpl(NamedDecl *D) {
   if (!D->getDeclName())
     return;
 
-  // FIXME: This feels like a hack. Should DeclarationName support
-  // template-ids, or is there a better way to keep specializations
-  // from being visible?
-  if (isa<ClassTemplateSpecializationDecl>(D) || D->isTemplateParameter())
+  // Skip entities that can't be found by name lookup into a particular
+  // context.
+  if ((D->getIdentifierNamespace() == 0 && !isa<UsingDirectiveDecl>(D)) ||
+      D->isTemplateParameter())
     return;
 
   ASTContext *C = 0;