3 files changed, 8 insertions, 5 deletions
diff --git a/lib/Sema/SemaDeclAttr.cpp b/lib/Sema/SemaDeclAttr.cpp
index 244f70a2db..746c5dbb37 100644
--- a/lib/Sema/SemaDeclAttr.cpp
+++ b/lib/Sema/SemaDeclAttr.cpp
@@ -3175,7 +3175,7 @@ void Sema::HandleDelayedDeprecationCheck(DelayedDiagnostic &DD,
 
 void Sema::EmitDeprecationWarning(NamedDecl *D, llvm::StringRef Message,
                                   SourceLocation Loc,
-                                  bool UnknownObjCClass) {
+                                  const ObjCInterfaceDecl *UnknownObjCClass) {
   // Delay if we're currently parsing a declaration.
   if (DelayedDiagnostics.shouldDelayDiagnostics()) {
     DelayedDiagnostics.add(DelayedDiagnostic::makeDeprecation(Loc, D, Message));
@@ -3191,7 +3191,9 @@ void Sema::EmitDeprecationWarning(NamedDecl *D, llvm::StringRef Message,
   else {
     if (!UnknownObjCClass)
       Diag(Loc, diag::warn_deprecated) << D->getDeclName();
-    else
+    else {
       Diag(Loc, diag::warn_deprecated_fwdclass_message) << D->getDeclName();
+      Diag(UnknownObjCClass->getLocation(), diag::note_forward_class);
+    }
   }
 }
diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index a773c3a817..da7619d0f4 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -56,7 +56,7 @@ using namespace sema;
 /// referenced), false otherwise.
 ///
 bool Sema::DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc,
-                             bool UnknownObjCClass) {
+                             const ObjCInterfaceDecl *UnknownObjCClass) {
   if (getLangOptions().CPlusPlus && isa<FunctionDecl>(D)) {
     // If there were any diagnostics suppressed by template argument deduction,
     // emit them now.
diff --git a/lib/Sema/SemaExprObjC.cpp b/lib/Sema/SemaExprObjC.cpp
index 04f5e32bda..2a262f0939 100644
--- a/lib/Sema/SemaExprObjC.cpp
+++ b/lib/Sema/SemaExprObjC.cpp
@@ -1155,7 +1155,7 @@ ExprResult Sema::BuildInstanceMessage(Expr *Receiver,
           // Search protocol qualifiers.
           Method = LookupMethodInQualifiedType(Sel, OCIType, true);
         
-        bool forwardClass = false;
+        const ObjCInterfaceDecl *forwardClass = 0;
         if (!Method) {
           // If we have implementations in scope, check "private" methods.
           Method = LookupPrivateInstanceMethod(Sel, ClassDecl);
@@ -1167,7 +1167,8 @@ ExprResult Sema::BuildInstanceMessage(Expr *Receiver,
             if (OCIType->qual_empty()) {
               Method = LookupInstanceMethodInGlobalPool(Sel,
                                                  SourceRange(LBracLoc, RBracLoc));
-              forwardClass = OCIType->getInterfaceDecl()->isForwardDecl();
+              if (OCIType->getInterfaceDecl()->isForwardDecl())
+                forwardClass = OCIType->getInterfaceDecl();
               if (Method && !forwardClass)
                 Diag(Loc, diag::warn_maynot_respond)
                   << OCIType->getInterfaceDecl()->getIdentifier() << Sel;