Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/CodeGen/PreISelIntrinsicLowering.h b/linux-x64/clang/include/llvm/CodeGen/PreISelIntrinsicLowering.h
new file mode 100644
index 0000000..7a007eb
--- /dev/null
+++ b/linux-x64/clang/include/llvm/CodeGen/PreISelIntrinsicLowering.h
@@ -0,0 +1,29 @@
+//===- PreISelIntrinsicLowering.h - Pre-ISel intrinsic lowering pass ------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This pass implements IR lowering for the llvm.load.relative intrinsic.
+//
+//===----------------------------------------------------------------------===//
+#ifndef LLVM_CODEGEN_PREISELINTRINSICLOWERING_H
+#define LLVM_CODEGEN_PREISELINTRINSICLOWERING_H
+
+#include "llvm/IR/PassManager.h"
+
+namespace llvm {
+
+class Module;
+
+struct PreISelIntrinsicLoweringPass
+    : PassInfoMixin<PreISelIntrinsicLoweringPass> {
+  PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+};
+
+} // end namespace llvm
+
+#endif // LLVM_CODEGEN_PREISELINTRINSICLOWERING_H