Bitcode streaming

include/llvm/Bitcode/ReaderWriter.h

Index: include/llvm/Bitcode/ReaderWriter.h
diff --git a/include/llvm/Bitcode/ReaderWriter.h b/include/llvm/Bitcode/ReaderWriter.h
index fa754c014621f52af5698561d1718ae014f24bca..803373c04603e8ee1dedca1132b1a5b74d9a5a43 100644
--- a/include/llvm/Bitcode/ReaderWriter.h
+++ b/include/llvm/Bitcode/ReaderWriter.h
@@ -14,6 +14,7 @@
 #ifndef LLVM_BITCODE_H
 #define LLVM_BITCODE_H
 
+#include "llvm/Bitcode/BitcodeStream.h"
 #include <string>
 
 namespace llvm {
@@ -33,6 +34,13 @@ namespace llvm {
                                LLVMContext& Context,
                                std::string *ErrMsg = 0);
 
+  /// Like getLazyBitcodeModule, except it calls cb to get chunks of the
+  /// bitcode instead of needing the whole buffer ahead of time.
+  Module *getLazyBitcodeStreamModule(const std::string &name,
+                                     StreamChunkCallback cb,
+                                     LLVMContext& Context,
+                                     std::string *ErrMsg = 0);
+
   /// getBitcodeTargetTriple - Read the header of the specified bitcode
   /// buffer and extract just the triple information. If successful,
   /// this returns a string and *does not* take ownership
@@ -113,8 +121,10 @@ namespace llvm {
   /// This function is called when we find a file with a matching magic number.
   /// In this case, skip down to the subsection of the file that is actually a
   /// BC file.
-  static inline bool SkipBitcodeWrapperHeader(unsigned char *&BufPtr,
-                                              unsigned char *&BufEnd) {
+  /// If 'verify' is true, check that the file fits in the buffer.
+  static inline bool SkipBitcodeWrapperHeader(const unsigned char *&BufPtr,
+                                              const unsigned char *&BufEnd,
+                                              bool Verify) {
     enum {
       KnownHeaderSize = 4*4,  // Size of header we read.
       OffsetField = 2*4,      // Offset in bytes to Offset field.
@@ -134,7 +144,7 @@ namespace llvm {
                        (BufPtr[SizeField  +3] << 24));
     
     // Verify that Offset+Size fits in the file.
-    if (Offset+Size > unsigned(BufEnd-BufPtr))
+    if (Verify && Offset+Size > unsigned(BufEnd-BufPtr))
       return true;
     BufPtr += Offset;
     BufEnd = BufPtr+Size;