Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/CodeGen/ExpandReductions.h b/linux-x64/clang/include/llvm/CodeGen/ExpandReductions.h
new file mode 100644
index 0000000..c6aaaad
--- /dev/null
+++ b/linux-x64/clang/include/llvm/CodeGen/ExpandReductions.h
@@ -0,0 +1,24 @@
+//===----- ExpandReductions.h - Expand experimental reduction intrinsics --===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CODEGEN_EXPANDREDUCTIONS_H
+#define LLVM_CODEGEN_EXPANDREDUCTIONS_H
+
+#include "llvm/IR/PassManager.h"
+
+namespace llvm {
+
+class ExpandReductionsPass
+ : public PassInfoMixin<ExpandReductionsPass> {
+public:
+ PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+};
+} // end namespace llvm
+
+#endif // LLVM_CODEGEN_EXPANDREDUCTIONS_H