Added support in serializer and deserializer to create arbitrary blocks.

Added detection of end-of-stream in deserializer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43736 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Bitcode/Deserialize.h

@@ -153,6 +153,8 @@ public:
   void RegisterPtr(const void* Ptr) {
     RegisterPtr(ReadInt(),Ptr);
   }
+  
+  bool AtEnd();
 
 private:
   void ReadRecord();