llvm-mc.cpp revision f9f065e45500823cdeb25bde2154d871ab6e9125 
1//===-- llvm-dis.cpp - The low-level LLVM disassembler --------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This utility may be invoked in the following manner:
11//  llvm-dis [options]      - Read LLVM bitcode from stdin, write asm to stdout
12//  llvm-dis [options] x.bc - Read LLVM bitcode from the x.bc file, write asm
13//                            to the x.ll file.
14//  Options:
15//      --help   - Output information about command line switches
16//
17//===----------------------------------------------------------------------===//
18
19#include "llvm/Support/CommandLine.h"
20#include "llvm/Support/ManagedStatic.h"
21#include "llvm/Support/MemoryBuffer.h"
22#include "llvm/Support/PrettyStackTrace.h"
23#include "llvm/Support/raw_ostream.h"
24#include "llvm/System/Signals.h"
25using namespace llvm;
26
27static cl::opt<std::string>
28InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
29
30static cl::opt<std::string>
31OutputFilename("o", cl::desc("Output filename"),
32               cl::value_desc("filename"));
33
34int main(int argc, char **argv) {
35  // Print a stack trace if we signal out.
36  sys::PrintStackTraceOnErrorSignal();
37  PrettyStackTraceProgram X(argc, argv);
38
39  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
40
41  cl::ParseCommandLineOptions(argc, argv, "llvm machine code playground\n");
42
43  std::string ErrorMessage;
44
45  MemoryBuffer *Buffer
46    = MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage);
47
48  if (Buffer == 0) {
49    errs() << argv[0] << ": ";
50    if (ErrorMessage.size())
51      errs() << ErrorMessage << "\n";
52    else
53      errs() << "input file didn't read correctly.\n";
54    return 1;
55  }
56
57
58
59  return 0;
60}
61
62