Convert to using llvm streams instead of iostreams.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31989 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Analysis/DataStructure/DataStructure.cpp

@@ -25,6 +25,7 @@
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SCCIterator.h"
 #include "llvm/ADT/Statistic.h"
+#include "llvm/Support/Streams.h"
 #include "llvm/Support/Timer.h"
 #include <iostream>
 #include <algorithm>
@@ -1262,7 +1263,7 @@ DSGraph::~DSGraph() {
 }
 
 // dump - Allow inspection of graph in a debugger.
-void DSGraph::dump() const { print(std::cerr); }
+void DSGraph::dump() const { print(llvm_cerr); }
 
 
 /// remapLinks - Change all of the Links in the current node according to the