+//===-- 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.
+//
//===----------------------------------------------------------------------===//
-// LLVM 'DIS' UTILITY
//
// This utility may be invoked in the following manner:
-// 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
-// -dfo - Print basic blocks in depth first order
-// -rdfo - Print basic blocks in reverse depth first order
-// -po - Print basic blocks in post order
-// -rpo - Print basic blocks in reverse post order
-//
-// TODO: add -vcg which prints VCG compatible output.
//
//===----------------------------------------------------------------------===//
-#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/Bitcode/ReaderWriter.h"
#include "llvm/Support/CommandLine.h"
-#include "llvm/Method.h"
-#include "llvm/Support/DepthFirstIterator.h"
-#include "llvm/Support/PostOrderIterator.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("-"));
-// OutputMode - The different orderings to print basic blocks in...
-enum OutputMode {
- Default = 0, // Method Order (list order)
- dfo, // Depth First ordering
- rdfo, // Reverse Depth First ordering
- po, // Post Order
- rpo, // Reverse Post Order
-};
+static cl::opt<std::string>
+OutputFilename("o", cl::desc("Override output filename"),
+ cl::value_desc("filename"));
-cl::String InputFilename ("", "Load <arg> file, print as assembly", 0, "-");
-cl::String OutputFilename("o", "Override output filename", cl::NoFlags, "");
-cl::Flag Force ("f", "Overwrite output files", cl::NoFlags, false);
-cl::EnumFlags<enum OutputMode> WriteMode(cl::NoFlags,
- clEnumVal(Default, "Write basic blocks in bytecode order"),
- clEnumVal(dfo , "Write basic blocks in depth first order"),
- clEnumVal(rdfo , "Write basic blocks in reverse DFO"),
- clEnumVal(po , "Write basic blocks in postorder"),
- clEnumVal(rpo , "Write basic blocks in reverse postorder"),
- 0);
+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) {
- cl::ParseCommandLineOptions(argc, argv, " llvm .bc -> .ll disassembler\n");
- ostream *Out = &cout; // Default to printing to stdout...
+ // 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");
- Module *C = ParseBytecodeFile(InputFilename);
- if (C == 0) {
- cerr << "bytecode didn't read correctly.\n";
+ std::string ErrorMessage;
+ std::auto_ptr<Module> M;
+
+ if (MemoryBuffer *Buffer
+ = MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage)) {
+ M.reset(ParseBitcodeFile(Buffer, Context, &ErrorMessage));
+ delete Buffer;
+ }
+
+ if (M.get() == 0) {
+ errs() << argv[0] << ": ";
+ if (ErrorMessage.size())
+ errs() << ErrorMessage << "\n";
+ else
+ errs() << "bitcode didn't read correctly.\n";
return 1;
}
- if (OutputFilename != "") { // Specified an output filename?
- Out = new ofstream(OutputFilename.c_str(),
- (Force ? 0 : ios::noreplace)|ios::out);
- } else {
+ // Just use stdout. We won't actually print anything on it.
+ if (DontPrint)
+ OutputFilename = "-";
+
+ if (OutputFilename.empty()) { // Unspecified output, infer it.
if (InputFilename == "-") {
OutputFilename = "-";
- Out = &cout;
} else {
- string IFN = InputFilename;
+ const 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 = string(IFN.begin(), IFN.end()-3);
- } else {
- OutputFilename = IFN; // Append a .ll to it
- }
- OutputFilename += ".ll";
- Out = new ofstream(OutputFilename.c_str(),
- (Force ? 0 : ios::noreplace)|ios::out);
+ // 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";
}
}
- if (!Out->good()) {
- cerr << "Error opening " << OutputFilename
- << ": sending to stdout instead!\n";
- Out = &cout;
- }
-
- // All that dis does is write the assembly out to a file... which is exactly
- // what the writer library is supposed to do...
- //
- if (WriteMode == Default) {
- (*Out) << C; // Print out in list order
- } else {
- // TODO: This does not print anything other than the basic blocks in the
- // methods... more should definately be printed. It should be valid output
- // consumable by the assembler.
- //
- for (Module::iterator I = C->begin(), End = C->end(); I != End; ++I) {
- Method *M = *I;
- (*Out) << "-------------- Method: " << M->getName() << " -------------\n";
+ // Make sure that the Out file gets unlinked from the disk if we get a
+ // SIGINT.
+ if (OutputFilename != "-")
+ sys::RemoveFileOnSignal(sys::Path(OutputFilename));
- switch (WriteMode) {
- case dfo: // Depth First ordering
- copy(df_begin(M), df_end(M),
- ostream_iterator<BasicBlock*>(*Out, "\n"));
- break;
- case rdfo: // Reverse Depth First ordering
- copy(df_begin(M, true), df_end(M),
- ostream_iterator<BasicBlock*>(*Out, "\n"));
- break;
- case po: // Post Order
- copy(po_begin(M), po_end(M),
- ostream_iterator<BasicBlock*>(*Out, "\n"));
- break;
- case rpo: { // Reverse Post Order
- ReversePostOrderTraversal RPOT(M);
- copy(RPOT.begin(), RPOT.end(),
- ostream_iterator<BasicBlock*>(*Out, "\n"));
- break;
- }
- default:
- abort();
- break;
- }
- }
+ 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;
}
- 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;
}
+