-//===------------------------------------------------------------------------===
+//===----------------------------------------------------------------------===//
// LLVM 'DIS' UTILITY
//
// 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.
+// Options:
+// --help - Output information about command line switches
+// -c - Print C code instead of LLVM assembly
//
-//===------------------------------------------------------------------------===
+//===----------------------------------------------------------------------===//
-#include <iostream.h>
-#include <fstream.h>
#include "llvm/Module.h"
-#include "llvm/Assembly/Writer.h"
+#include "llvm/PassManager.h"
#include "llvm/Bytecode/Reader.h"
-#include "llvm/Tools/CommandLine.h"
+#include "llvm/Assembly/CWriter.h"
+#include "llvm/Assembly/PrintModulePass.h"
+#include "Support/CommandLine.h"
+#include "Support/Signals.h"
+#include <fstream>
+#include <memory>
+using std::cerr;
+
+// OutputMode - The different orderings to print basic blocks in...
+enum OutputMode {
+ llvm = 0, // Generate LLVM assembly (the default)
+ c, // Generate C code
+};
+
+static cl::opt<std::string>
+InputFilename(cl::Positional, cl::desc("<input bytecode>"), 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<enum OutputMode>
+WriteMode(cl::desc("Specify the output format:"),
+ cl::values(
+ clEnumVal(llvm, "Output LLVM assembly"),
+ clEnumVal(c , "Output C code for program"),
+ 0));
int main(int argc, char **argv) {
- ToolCommandLine Opts(argc, argv, false);
+ cl::ParseCommandLineOptions(argc, argv, " llvm .bc -> .ll disassembler\n");
+ std::ostream *Out = &std::cout; // Default to printing to stdout...
- // 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";
+ std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
+ if (M.get() == 0) {
+ cerr << argv[0] << ": bytecode didn't read correctly.\n";
return 1;
}
- ostream *Out = &cout; // Default to printing to stdout...
+ if (OutputFilename != "") { // Specified an output filename?
+ 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);
+ } else {
+ OutputFilename = IFN; // Append a .ll to it
+ }
+ if (WriteMode == c)
+ OutputFilename += ".c";
+ else
+ OutputFilename += ".ll";
- 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()
- << ": sending to stdout instead!\n";
- Out = &cout;
+ 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 unlink'd from the disk if we get a
+ // SIGINT
+ RemoveFileOnSignal(OutputFilename);
}
+ }
+ }
+
+ if (!Out->good()) {
+ cerr << argv[0] << ": error opening " << OutputFilename
+ << ": sending to stdout instead!\n";
+ Out = &std::cout;
}
-
- // 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 dis does is write the assembly or C out to a file...
+ //
+ PassManager Passes;
+
+ switch (WriteMode) {
+ case llvm: // Output LLVM assembly
+ Passes.add(new PrintModulePass(Out));
+ break;
+ case c: // Convert LLVM to C
+ Passes.add(createWriteToCPass(*Out));
+ break;
+ }
+
+ Passes.run(*M.get());
+
+ if (Out != &std::cout) {
+ ((std::ofstream*)Out)->close();
+ delete Out;
+ }
return 0;
}
+
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