Switch the bitcode reader interface to take a MemoryBuffer instead of knowing

anything about disk I/O itself.  This greatly simplifies its interface -
eliminating the need for the ReaderWrappers.cpp file.

This adds a new option to llvm-dis (-bitcode) which instructs it to read
the input file as bitcode.  Until/unless the bytecode reader is taught to
read from MemoryBuffer, there is no way to handle stdin reading without it.

I don't plan to switch the bytecode reader over, I'd rather delete it :),
so the option will stay around temporarily.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36554 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 98 deletions

diff --git a/lib/Bitcode/Reader/ReaderWrappers.cpp b/lib/Bitcode/Reader/ReaderWrappers.cpp
deleted file mode 100644
index 8bf81a2f83..0000000000
--- a/lib/Bitcode/Reader/ReaderWrappers.cpp
+++ /dev/null
@@ -1,98 +0,0 @@
-//===- ReaderWrappers.cpp - Parse bitcode from file or buffer -------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file was developed by Chris Lattner and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements loading and parsing a bitcode file and parsing a
-// module from a memory buffer.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Bitcode/ReaderWriter.h"
-#include "BitcodeReader.h"
-#include "llvm/System/MappedFile.h"
-using namespace llvm;
-
-//===----------------------------------------------------------------------===//
-// BitcodeFileReader - Read from an mmap'able file descriptor.
-
-namespace {
-  /// BitcodeFileReader - parses bitcode from a file.
-  ///
-  class BitcodeFileReader : public BitcodeReader {
-  private:
-    std::string Filename;
-    sys::MappedFile File;
-    
-    BitcodeFileReader(const BitcodeFileReader&); // DO NOT IMPLEMENT
-    void operator=(const BitcodeFileReader&); // DO NOT IMPLEMENT
-  public:
-    BitcodeFileReader(const std::string &FN) : Filename(FN) {}
-    bool Read(std::string *ErrMsg);
-    
-    void FreeState() {
-      BitcodeReader::FreeState();
-      File.close();
-    }
-  };
-}
-
-bool BitcodeFileReader::Read(std::string *ErrMsg) {
-  if (File.open(sys::Path(Filename), sys::MappedFile::READ_ACCESS, ErrMsg))
-    return true;
-  if (!File.map(ErrMsg)) {
-    File.close();
-    return true;
-  }
-  unsigned char *Buffer = reinterpret_cast<unsigned char*>(File.base());
-  if (!ParseBitcode(Buffer, File.size(), Filename))
-    return false;
-  assert(getErrorString() && "Didn't set an error string?");
-  if (ErrMsg) *ErrMsg = getErrorString();
-  return true;
-}
-
-
-
-//===----------------------------------------------------------------------===//
-// External interface
-//===----------------------------------------------------------------------===//
-
-/// getBitcodeModuleProvider - lazy function-at-a-time loading from a file.
-///
-ModuleProvider *llvm::getBitcodeModuleProvider(const std::string &Filename,
-                                               std::string *ErrMsg) {
-  if (Filename != std::string("-")) {
-    BitcodeFileReader *R = new BitcodeFileReader(Filename);
-    if (R->Read(ErrMsg)) {
-      delete R;
-      return 0;
-    }
-    return R;
-  }
-  
-  assert(0 && "FIXME: stdin reading unimp!");
-#if 0
-  // Read from stdin
-  BytecodeStdinReader *R = new BytecodeStdinReader();
-  if (R->Read(ErrMsg)) {
-    delete R;
-    return 0;
-  }
-  return R;
-#endif
-}
-
-/// ParseBitcodeFile - Read the specified bitcode file, returning the module.
-/// If an error occurs, return null and fill in *ErrMsg if non-null.
-Module *llvm::ParseBitcodeFile(const std::string &Filename,std::string *ErrMsg){
-  ModuleProvider *MP = getBitcodeModuleProvider(Filename, ErrMsg);
-  if (!MP) return 0;
-  Module *M = MP->releaseModule(ErrMsg);
-  delete MP;
-  return M;
-}