Index: test/CodeGenObjC/selector-ref-invariance.m
===================================================================
--- test/CodeGenObjC/selector-ref-invariance.m	(revision 0)
+++ test/CodeGenObjC/selector-ref-invariance.m	(revision 0)
@@ -0,0 +1,10 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin11 -emit-llvm -fblocks -o - %s | FileCheck %s
+
+// rdar://6027699
+
+#include <Cocoa/Cocoa.h>
+void test(id x) {
+// CHECK: load i8** @"\01L_OBJC_SELECTOR_REFERENCES_", !invariant.load
+// CHECK: @objc_msgSend
+  [x foo];
+}
Index: lib/CodeGen/CGObjCMac.cpp
===================================================================
--- lib/CodeGen/CGObjCMac.cpp	(revision 144239)
+++ lib/CodeGen/CGObjCMac.cpp	(working copy)
@@ -5887,7 +5887,12 @@
 
   if (lval)
     return Entry;
-  return Builder.CreateLoad(Entry);
+  llvm::LoadInst* LI = Builder.CreateLoad(Entry);
+  
+  LI->setMetadata(CGM.getModule().getMDKindID("invariant.load"), 
+                  llvm::MDNode::get(VMContext,
+                                    ArrayRef<llvm::Value*>()));
+  return LI;
 }
 /// EmitObjCIvarAssign - Code gen for assigning to a __strong object.
 /// objc_assign_ivar (id src, id *dst, ptrdiff_t)