Add #includes to make some dependencies explicit.
llvm-svn: 51496
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 066952d..31cbdb9 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -29,6 +29,7 @@
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
#include <algorithm>
+#include <set>
using namespace llvm;
STATISTIC(NodesCombined , "Number of dag nodes combined");