Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/CodeGen/DAGCombine.h b/linux-x64/clang/include/llvm/CodeGen/DAGCombine.h
new file mode 100644
index 0000000..8b59190
--- /dev/null
+++ b/linux-x64/clang/include/llvm/CodeGen/DAGCombine.h
@@ -0,0 +1,25 @@
+//===-- llvm/CodeGen/DAGCombine.h ------- SelectionDAG Nodes ---*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+
+#ifndef LLVM_CODEGEN_DAGCOMBINE_H
+#define LLVM_CODEGEN_DAGCOMBINE_H
+
+namespace llvm {
+
+enum CombineLevel {
+ BeforeLegalizeTypes,
+ AfterLegalizeTypes,
+ AfterLegalizeVectorOps,
+ AfterLegalizeDAG
+};
+
+} // end llvm namespace
+
+#endif