1 files changed, 11 insertions, 0 deletions
diff --git a/clang/lib/Sema/SemaLookup.cpp b/clang/lib/Sema/SemaLookup.cpp
index 82f404f1f2f..fc8b6b9c09a 100644
--- a/clang/lib/Sema/SemaLookup.cpp
+++ b/clang/lib/Sema/SemaLookup.cpp
@@ -217,6 +217,7 @@ static inline unsigned getIDNS(Sema::LookupNameKind NameKind,
   case Sema::LookupObjCImplicitSelfParam:
   case Sema::LookupOrdinaryName:
   case Sema::LookupRedeclarationWithLinkage:
+  case Sema::LookupLocalFriendName:
     IDNS = Decl::IDNS_Ordinary;
     if (CPlusPlus) {
       IDNS |= Decl::IDNS_Tag | Decl::IDNS_Member | Decl::IDNS_Namespace;
@@ -908,6 +909,15 @@ bool Sema::CppLookupName(LookupResult &R, Scope *S) {
       return true;
     }
 
+    if (R.getLookupKind() == LookupLocalFriendName && !S->isClassScope()) {
+      // C++11 [class.friend]p11:
+      //   If a friend declaration appears in a local class and the name
+      //   specified is an unqualified name, a prior declaration is
+      //   looked up without considering scopes that are outside the
+      //   innermost enclosing non-class scope.
+      return false;
+    }
+
     if (!Ctx && S->isTemplateParamScope() && OutsideOfTemplateParamDC &&
         S->getParent() && !S->getParent()->isTemplateParamScope()) {
       // We've just searched the last template parameter scope and
@@ -1594,6 +1604,7 @@ bool Sema::LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx,
     case LookupOrdinaryName:
     case LookupMemberName:
     case LookupRedeclarationWithLinkage:
+    case LookupLocalFriendName:
       BaseCallback = &CXXRecordDecl::FindOrdinaryMember;
       break;