-//===------------------------------------------------------------------------===
-// LLVM 'DIS' UTILITY
+//===-- llvm-dis.cpp - The low-level LLVM disassembler --------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
//
// This utility may be invoked in the following manner:
-// dis --help - Output information about command line switches
-// dis [options] - Read LLVM bytecode from stdin, write assembly to stdout
-// dis [options] x.bc - Read LLVM bytecode from the x.bc file, write assembly
-// to the x.ll file.
+// llvm-dis [options] - Read LLVM bitcode from stdin, write asm to stdout
+// llvm-dis [options] x.bc - Read LLVM bitcode from the x.bc file, write asm
+// to the x.ll file.
+// Options:
+// --help - Output information about command line switches
//
-//===------------------------------------------------------------------------===
+//===----------------------------------------------------------------------===//
-#include <iostream.h>
-#include <fstream.h>
+#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
-#include "llvm/Assembly/Writer.h"
-#include "llvm/Bytecode/Reader.h"
-#include "llvm/Tools/CommandLine.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/System/Signals.h"
+#include <memory>
+using namespace llvm;
+
+static cl::opt<std::string>
+InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
+
+static cl::opt<std::string>
+OutputFilename("o", cl::desc("Override output filename"),
+ cl::value_desc("filename"));
+
+static cl::opt<bool>
+Force("f", cl::desc("Enable binary output on terminals"));
+
+static cl::opt<bool>
+DontPrint("disable-output", cl::desc("Don't output the .ll file"), cl::Hidden);
int main(int argc, char **argv) {
- ToolCommandLine Opts(argc, argv, false);
+ // Print a stack trace if we signal out.
+ sys::PrintStackTraceOnErrorSignal();
+ PrettyStackTraceProgram X(argc, argv);
+
+ LLVMContext &Context = getGlobalContext();
+ llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+
+
+ cl::ParseCommandLineOptions(argc, argv, "llvm .bc -> .ll disassembler\n");
- // We only support the options that the system parser does... if it left any
- // then we don't know what to do.
- //
- if (argc > 1) {
- for (int i = 1; i < argc; i++) {
- if (string(argv[i]) != string("--help"))
- cerr << argv[0] << ": argument not recognized: '" << argv[i] << "'!\n";
- }
-
- cerr << argv[0] << " usage:\n"
- << " " << argv[0] << " --help - Print this usage information\n"
- << " " << argv[0] << " x.bc - Parse <x.bc> file and output "
- << "assembly to x.ll\n"
- << " " << argv[0] << " - Parse stdin and write to stdout.\n";
- return 1;
+ std::string ErrorMessage;
+ std::auto_ptr<Module> M;
+
+ if (MemoryBuffer *Buffer
+ = MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage)) {
+ M.reset(ParseBitcodeFile(Buffer, Context, &ErrorMessage));
+ delete Buffer;
}
-
- ostream *Out = &cout; // Default to printing to stdout...
- Module *C = ParseBytecodeFile(Opts.getInputFilename());
- if (C == 0) {
- cerr << "bytecode didn't read correctly.\n";
+ if (M.get() == 0) {
+ errs() << argv[0] << ": ";
+ if (ErrorMessage.size())
+ errs() << ErrorMessage << "\n";
+ else
+ errs() << "bitcode didn't read correctly.\n";
return 1;
}
- if (Opts.getOutputFilename() != "-") {
- Out = new ofstream(Opts.getOutputFilename().c_str(),
- (Opts.getForce() ? 0 : ios::noreplace)|ios::out);
- if (!Out->good()) {
- cerr << "Error opening " << Opts.getOutputFilename()
- << ": sending to stdout instead!\n";
- Out = &cout;
- }
+ // Just use stdout. We won't actually print anything on it.
+ if (DontPrint)
+ OutputFilename = "-";
+
+ if (OutputFilename.empty()) { // Unspecified output, infer it.
+ if (InputFilename == "-") {
+ OutputFilename = "-";
+ } else {
+ const std::string &IFN = InputFilename;
+ int Len = IFN.length();
+ // If the source ends in .bc, strip it off.
+ if (IFN[Len-3] == '.' && IFN[Len-2] == 'b' && IFN[Len-1] == 'c')
+ OutputFilename = std::string(IFN.begin(), IFN.end()-3)+".ll";
+ else
+ OutputFilename = IFN+".ll";
+ }
+ }
+
+ // Make sure that the Out file gets unlinked from the disk if we get a
+ // SIGINT.
+ if (OutputFilename != "-")
+ sys::RemoveFileOnSignal(sys::Path(OutputFilename));
+
+ std::string ErrorInfo;
+ std::auto_ptr<raw_fd_ostream>
+ Out(new raw_fd_ostream(OutputFilename.c_str(), ErrorInfo,
+ raw_fd_ostream::F_Binary));
+ if (!ErrorInfo.empty()) {
+ errs() << ErrorInfo << '\n';
+ return 1;
}
-
- // All that dis does is write the assembly out to a file... which is exactly
- // what the writer library is supposed to do...
- (*Out) << C;
- delete C;
- if (Out != &cout) delete Out;
+ // All that llvm-dis does is write the assembly to a file.
+ if (!DontPrint)
+ *Out << *M;
+
return 0;
}
+
projects / oota-llvm.git / blobdiff