-//===------------------------------------------------------------------------===
-// 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/Module.h"
-#include "llvm/Assembly/Writer.h"
-#include "llvm/Bytecode/Reader.h"
-#include "llvm/Tools/CommandLine.h"
+#include "llvm/PassManager.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/Assembly/PrintModulePass.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/Streams.h"
+#include "llvm/System/Signals.h"
+#include <iostream>
+#include <fstream>
+#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("Overwrite output files"));
+
+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);
-
- // 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";
+ llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
+ try {
+ cl::ParseCommandLineOptions(argc, argv, "llvm .bc -> .ll disassembler\n");
+ sys::PrintStackTraceOnErrorSignal();
+
+ std::ostream *Out = &std::cout; // Default to printing to stdout.
+ std::string ErrorMessage;
+
+ std::auto_ptr<Module> M;
+
+ if (MemoryBuffer *Buffer
+ = MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage)) {
+ M.reset(ParseBitcodeFile(Buffer, &ErrorMessage));
+ delete Buffer;
+ }
+
+ if (M.get() == 0) {
+ cerr << argv[0] << ": ";
+ if (ErrorMessage.size())
+ cerr << ErrorMessage << "\n";
+ else
+ cerr << "bitcode didn't read correctly.\n";
+ return 1;
}
- 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;
- }
-
- ostream *Out = &cout; // Default to printing to stdout...
+ if (DontPrint) {
+ // Just use stdout. We won't actually print anything on it.
+ } else if (OutputFilename != "") { // Specified an output filename?
+ if (OutputFilename != "-") { // Not stdout?
+ if (!Force && std::ifstream(OutputFilename.c_str())) {
+ // If force is not specified, make sure not to overwrite a file!
+ cerr << argv[0] << ": error opening '" << OutputFilename
+ << "': file exists! Sending to standard output.\n";
+ } else {
+ Out = new std::ofstream(OutputFilename.c_str());
+ }
+ }
+ } else {
+ if (InputFilename == "-") {
+ OutputFilename = "-";
+ } else {
+ std::string IFN = InputFilename;
+ int Len = IFN.length();
+ if (IFN[Len-3] == '.' && IFN[Len-2] == 'b' && IFN[Len-1] == 'c') {
+ // Source ends in .bc
+ OutputFilename = std::string(IFN.begin(), IFN.end()-3)+".ll";
+ } else {
+ OutputFilename = IFN+".ll";
+ }
+
+ if (!Force && std::ifstream(OutputFilename.c_str())) {
+ // If force is not specified, make sure not to overwrite a file!
+ cerr << argv[0] << ": error opening '" << OutputFilename
+ << "': file exists! Sending to standard output.\n";
+ } else {
+ Out = new std::ofstream(OutputFilename.c_str());
+
+ // Make sure that the Out file gets unlinked from the disk if we get a
+ // SIGINT
+ sys::RemoveFileOnSignal(sys::Path(OutputFilename));
+ }
+ }
+ }
- Module *C = ParseBytecodeFile(Opts.getInputFilename());
- if (C == 0) {
- cerr << "bytecode 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()
+ cerr << argv[0] << ": error opening " << OutputFilename
<< ": sending to stdout instead!\n";
- Out = &cout;
- }
+ Out = &std::cout;
+ }
+
+ // All that llvm-dis does is write the assembly to a file.
+ if (!DontPrint) {
+ PassManager Passes;
+ OStream L(*Out);
+ Passes.add(new PrintModulePass(&L));
+ Passes.run(*M.get());
+ }
+
+ if (Out != &std::cout) {
+ ((std::ofstream*)Out)->close();
+ delete Out;
+ }
+ return 0;
+ } catch (const std::string& msg) {
+ cerr << argv[0] << ": " << msg << "\n";
+ } catch (...) {
+ cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
}
-
- // 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;
- return 0;
+ return 1;
}
+
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