Bitcode streaming

include/llvm/Support/IRReader.h

Index: include/llvm/Support/IRReader.h
diff --git a/include/llvm/Support/IRReader.h b/include/llvm/Support/IRReader.h
index 6d8a9b30ae1fd8bfee9f0c9b7f6bdceb765a2743..6f5bc3aa3e496a37e82bc4aa9e1d2661821ad470 100644
--- a/include/llvm/Support/IRReader.h
+++ b/include/llvm/Support/IRReader.h
@@ -21,6 +21,7 @@
 
 #include "llvm/ADT/OwningPtr.h"
 #include "llvm/Assembly/Parser.h"
+#include "llvm/Bitcode/BitcodeStream.h"
 #include "llvm/Bitcode/ReaderWriter.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/SourceMgr.h"
@@ -69,6 +70,22 @@ namespace llvm {
     return getLazyIRModule(File.take(), Err, Context);
   }
 
+  // like lazy file module but does not read the whole file at the start;

[jasonwkim, 2011/10/25 21:34:12]

Use /// for doxygen

[(google.com) Derek Schuff, 2011/10/25 22:23:22]

Done.

+  // instead executes a callback to get more bytes as needed by the parser.
+  // The stream must contain bitcode.
+  inline Module *getLazyIRStreamModule(const std::string &Filename,
+                                       SMDiagnostic &Err,
+                                       LLVMContext &Context,
+                                       StreamChunkCallback cb) {
+    std::string ErrMsg;
+    Module *M = getLazyBitcodeStreamModule(Filename, cb, Context, &ErrMsg);
+    if (M == 0) {
+      Err = SMDiagnostic(Filename, SourceMgr::DK_Error, ErrMsg);
+      return 0;
+    }
+    return M;
+  }
+
   /// If the given MemoryBuffer holds a bitcode image, return a Module
   /// for it.  Otherwise, attempt to parse it as LLVM Assembly and return
   /// a Module for it. This function *always* takes ownership of the given