objective-C blocks: Provide layout map for byref
variables captured in a block. // rdar://12184410

llvm-svn: 167931
diff --git a/clang/lib/CodeGen/CGObjCRuntime.h b/clang/lib/CodeGen/CGObjCRuntime.h
index 3e77875..17e7a9d 100644
--- a/clang/lib/CodeGen/CGObjCRuntime.h
+++ b/clang/lib/CodeGen/CGObjCRuntime.h
@@ -263,6 +263,8 @@
                                   const CodeGen::CGBlockInfo &blockInfo) = 0;
   virtual llvm::Constant *BuildRCBlockLayout(CodeGen::CodeGenModule &CGM,
                                   const CodeGen::CGBlockInfo &blockInfo) = 0;
+  virtual llvm::Constant *BuildByrefLayout(CodeGen::CodeGenModule &CGM,
+                                           QualType T) = 0;
   virtual llvm::GlobalVariable *GetClassGlobal(const std::string &Name) = 0;
 
   struct MessageSendInfo {