NeXT: Emit lazy reference to Protocol class for forward protocol

references (to match gcc).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@55760 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/CGObjCMac.cpp b/lib/CodeGen/CGObjCMac.cpp
index d1a165127712c28bbcfdd363df95c3420302e796..9638bc1430819eeecdfb11004ecc10fd39ad6774 100644 (file)
--- a/lib/CodeGen/CGObjCMac.cpp
+++ b/lib/CodeGen/CGObjCMac.cpp
@@ -509,6 +509,11 @@ CodeGen::RValue CGObjCMac::EmitMessageSend(CodeGen::CodeGenFunction &CGF,
 
 llvm::Value *CGObjCMac::GenerateProtocolRef(llvm::IRBuilder<> &Builder, 
                                             const ObjCProtocolDecl *PD) {
+  // FIXME: I don't understand why gcc generates this, or where it is
+  // resolved. Investigate. Its also wasteful to look this up over and
+  // over.
+  LazySymbols.insert(&CGM.getContext().Idents.get("Protocol"));
+
   return llvm::ConstantExpr::getBitCast(GetProtocolRef(PD),
                                         ObjCTypes.ExternalProtocolPtrTy);
 }