diff --git a/lib/CodeGen/AsmPrinter/ByteStreamer.h b/lib/CodeGen/AsmPrinter/ByteStreamer.h
new file mode 100644
index 00000000000..81b92e41458
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/ByteStreamer.h
@@ -0,0 +1,69 @@
+//===-- llvm/CodeGen/ByteStreamer.h - ByteStreamer class --------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains a class that can take bytes that would normally be
+// streamed via the AsmPrinter.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CODEGEN_BYTESTREAMER_H
+#define LLVM_CODEGEN_BYTESTREAMER_H
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/MC/MCStreamer.h"
+#include "DIEHash.h"
+
+namespace llvm {
+class ByteStreamer {
+ public:
+  // For now we're just handling the calls we need for dwarf emission/hashing.
+  virtual void EmitInt8(uint8_t Byte, const Twine &Comment = "") = 0;
+  virtual void EmitSLEB128(uint64_t DWord, const Twine &Comment = "") = 0;
+  virtual void EmitULEB128(uint64_t DWord, const Twine &Comment = "") = 0;
+};
+
+class APByteStreamer : public ByteStreamer {
+private:
+  AsmPrinter ≈
+
+public:
+  APByteStreamer(AsmPrinter &Asm) : AP(Asm) {}
+  void EmitInt8(uint8_t Byte, const Twine &Comment) {
+    AP.OutStreamer.AddComment(Comment);
+    AP.EmitInt8(Byte);
+  }
+  void EmitSLEB128(uint64_t DWord, const Twine &Comment) {
+    AP.OutStreamer.AddComment(Comment);
+    AP.EmitSLEB128(DWord);
+  }
+  void EmitULEB128(uint64_t DWord, const Twine &Comment) {
+    AP.OutStreamer.AddComment(Comment);
+    AP.EmitULEB128(DWord);
+  }
+};
+
+class HashingByteStreamer : public ByteStreamer {
+ private:
+  DIEHash &Hash;
+ public:
+ HashingByteStreamer(DIEHash &H) : Hash(H) {}
+  void EmitInt8(uint8_t Byte, const Twine &Comment) {
+    Hash.update(Byte);
+  }
+  void EmitSLEB128(uint64_t DWord, const Twine &Comment) {
+    Hash.addSLEB128(DWord);
+  }
+  void EmitULEB128(uint64_t DWord, const Twine &Comment) {
+    Hash.addULEB128(DWord);
+  }
+};
+}
+
+#endif