Bitcode streaming

tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp

 //===-- llvm-bcanalyzer.cpp - Bitcode Analyzer --------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This tool may be invoked in the following manner:
@@ skipping 467 matching lines @@
   // Read the input file.
   OwningPtr<MemoryBuffer> MemBuf;
 
   if (error_code ec =
         MemoryBuffer::getFileOrSTDIN(InputFilename.c_str(), MemBuf))
     return Error("Error reading '" + InputFilename + "': " + ec.message());
 
   if (MemBuf->getBufferSize() & 3)
     return Error("Bitcode stream should be a multiple of 4 bytes in length");
 
-  unsigned char *BufPtr = (unsigned char *)MemBuf->getBufferStart();
-  unsigned char *EndBufPtr = BufPtr+MemBuf->getBufferSize();
+  const unsigned char *BufPtr = (unsigned char *)MemBuf->getBufferStart();
+  const unsigned char *EndBufPtr = BufPtr+MemBuf->getBufferSize();
 
   // If we have a wrapper header, parse it and ignore the non-bc file contents.
   // The magic number is 0x0B17C0DE stored in little endian.
   if (isBitcodeWrapper(BufPtr, EndBufPtr))
-    if (SkipBitcodeWrapperHeader(BufPtr, EndBufPtr))
+    if (SkipBitcodeWrapperHeader(BufPtr, EndBufPtr, true))
       return Error("Invalid bitcode wrapper header");
 
   BitstreamReader StreamFile(BufPtr, EndBufPtr);
   BitstreamCursor Stream(StreamFile);
   StreamFile.CollectBlockInfoNames();
 
   // Read the stream signature.
   char Signature[6];
   Signature[0] = Stream.Read(8);
   Signature[1] = Stream.Read(8);
@@ skipping 115 matching lines @@
 
 int main(int argc, char **argv) {
   // Print a stack trace if we signal out.
   sys::PrintStackTraceOnErrorSignal();
   PrettyStackTraceProgram X(argc, argv);
   llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
   cl::ParseCommandLineOptions(argc, argv, "llvm-bcanalyzer file analyzer\n");
 
   return AnalyzeBitcode();
 }