Add explicit #includes of <iostream>

llvm-svn: 25515
diff --git a/llvm/lib/Target/X86/X86ISelPattern.cpp b/llvm/lib/Target/X86/X86ISelPattern.cpp
index b895be2..2a2ebd9 100644
--- a/llvm/lib/Target/X86/X86ISelPattern.cpp
+++ b/llvm/lib/Target/X86/X86ISelPattern.cpp
@@ -34,6 +34,7 @@
 #include "llvm/Support/MathExtras.h"
 #include "llvm/ADT/Statistic.h"
 #include <set>
+#include <iostream>
 #include <algorithm>
 using namespace llvm;