Add explicit #includes of <iostream>

llvm-svn: 25515
diff --git a/llvm/lib/Target/IA64/IA64ISelDAGToDAG.cpp b/llvm/lib/Target/IA64/IA64ISelDAGToDAG.cpp
index 6329be8..046e30b 100644
--- a/llvm/lib/Target/IA64/IA64ISelDAGToDAG.cpp
+++ b/llvm/lib/Target/IA64/IA64ISelDAGToDAG.cpp
@@ -26,6 +26,7 @@
 #include "llvm/GlobalValue.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/MathExtras.h"
+#include <iostream>
 using namespace llvm;
 
 namespace {