Bitcode streaming

include/llvm/Bitcode/BitcodeStream.h

Index: include/llvm/Bitcode/BitcodeStream.h
diff --git a/include/llvm/Bitcode/BitcodeStream.h b/include/llvm/Bitcode/BitcodeStream.h
new file mode 100644
index 0000000000000000000000000000000000000000..5c1dd7b3e97ef8dd67eb322b321926c5a528f6bd
--- /dev/null
+++ b/include/llvm/Bitcode/BitcodeStream.h
@@ -0,0 +1,30 @@
+//===---- llvm/Bitcode/BitcodeStream.h -  ----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Support for streaming (lazy reading) of bitcode files on disk
+//
+//===----------------------------------------------------------------------===//
+
+
+#ifndef BITCODESTREAM_H_
+#define BITCODESTREAM_H_
+
+#include <stddef.h>
+#include <string>
+
+namespace llvm {
+class SMDiagnostic;
+
+typedef size_t (*StreamChunkCallback)(unsigned char*, size_t);
+
+StreamChunkCallback GetBitcodeFileStream(const std::string &Filename,
+                                         SMDiagnostic &Err);
+}
+
+#endif  // BITCODESTREAM_H_