Add new checker-specific attribute 'objc_ownership_retain'. This isn't hooked up
to the checker yet, but essentially it allows a user to specify that an
Objective-C method or C function increments the reference count of a passed
object.

llvm-svn: 70005
diff --git a/clang/lib/Parse/AttributeList.cpp b/clang/lib/Parse/AttributeList.cpp
index 3371589..a205c04 100644
--- a/clang/lib/Parse/AttributeList.cpp
+++ b/clang/lib/Parse/AttributeList.cpp
@@ -133,6 +133,9 @@
   case 18:
     if (!memcmp(Str, "warn_unused_result", 18)) return AT_warn_unused_result;
     break;
+  case 21:
+    if (!memcmp(Str, "objc_ownership_retain", 21))
+      return AT_objc_ownership_returns;      
   case 22:
     if (!memcmp(Str, "objc_ownership_returns", 22))
       return AT_objc_ownership_returns;