From fead20c1de136b5a199a5cc4225f64be771452e4 Mon Sep 17 00:00:00 2001
From: John McCall <rjmccall@apple.com>
Date: Tue, 8 Dec 2009 22:45:53 +0000
Subject: [PATCH] Handle unresolved using decls in bare lookups.  These are not
 being adequately tested.  Fixes PR5727.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90893 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Sema/SemaExpr.cpp                               |  6 +++---
 .../dcl.dcl/basic.namespace/namespace.udecl/p12.cpp | 13 +++++++++++++
 2 files changed, 16 insertions(+), 3 deletions(-)
 create mode 100644 test/CXX/dcl.dcl/basic.namespace/namespace.udecl/p12.cpp

diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index 4920206b25..b284f83074 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -1346,9 +1346,9 @@ Sema::OwningExprResult
 Sema::BuildDeclarationNameExpr(const CXXScopeSpec &SS,
                                LookupResult &R,
                                bool NeedsADL) {
-  // If this isn't an overloaded result and we don't need ADL, just
-  // build an ordinary singleton decl ref.
-  if (!NeedsADL && !R.isOverloadedResult())
+  // If this is a single, fully-resolved result and we don't need ADL,
+  // just build an ordinary singleton decl ref.
+  if (!NeedsADL && R.isSingleResult())
     return BuildDeclarationNameExpr(SS, R.getNameLoc(), R.getFoundDecl());
 
   // We only need to check the declaration if there's exactly one
diff --git a/test/CXX/dcl.dcl/basic.namespace/namespace.udecl/p12.cpp b/test/CXX/dcl.dcl/basic.namespace/namespace.udecl/p12.cpp
new file mode 100644
index 0000000000..9386e6c025
--- /dev/null
+++ b/test/CXX/dcl.dcl/basic.namespace/namespace.udecl/p12.cpp
@@ -0,0 +1,13 @@
+// RUN: clang -fsyntax-only -verify %s
+
+// PR5727
+namespace test0 {
+  template<typename> struct RefPtr { };
+  template<typename> struct PtrHash {
+    static void f() { }
+  };
+  template<typename T> struct PtrHash<RefPtr<T> > : PtrHash<T*> {
+    using PtrHash<T*>::f;
+    static void f() { f(); }
+  };
+}
-- 
2.50.1