This patch adds support for sender-aware dispatch in Objective-C for the GNU runtime, when 
compiled with -fobjc-sender-dependent-dispatch.  This is used in AOP, COP, implementing object 
planes, and a few other things.
Patch by David Chisnall.

llvm-svn: 72275
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index fd071df..abfabbb 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -479,6 +479,7 @@
   Args.AddLastArg(CmdArgs, options::OPT_fno_show_column);
   Args.AddLastArg(CmdArgs, options::OPT_fobjc_gc_only);
   Args.AddLastArg(CmdArgs, options::OPT_fobjc_gc);
+  Args.AddLastArg(CmdArgs, options::OPT_fobjc_sender_dependent_dispatch);
   // FIXME: Should we remove this?
   Args.AddLastArg(CmdArgs, options::OPT_fobjc_nonfragile_abi);
   Args.AddLastArg(CmdArgs, options::OPT_fobjc_tight_layout);