Added missing include.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11129 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp
index dd94d40..497cf63 100644
--- a/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -38,6 +38,7 @@
 #include "llvm/Target/TargetMachine.h"
 #include "Support/Debug.h"
 #include "Support/Statistic.h"
+#include <iostream>
 using namespace llvm;
 
 namespace {