1 //===------------------------------------------------------------------------===
4 // This utility may be invoked in the following manner:
5 // as --help - Output information about command line switches
6 // as [options] - Read LLVM assembly from stdin, write bytecode to stdout
7 // as [options] x.ll - Read LLVM assembly from the x.ll file, write bytecode
10 //===------------------------------------------------------------------------===
12 #include "llvm/Module.h"
13 #include "llvm/Assembly/Parser.h"
14 #include "llvm/Bytecode/Writer.h"
15 #include "Support/CommandLine.h"
16 #include "Support/Signals.h"
22 cl::String InputFilename ("", "Parse <arg> file, compile to bytecode", 0, "-");
23 cl::String OutputFilename("o", "Override output filename", cl::NoFlags, "");
24 cl::Flag Force ("f", "Overwrite output files", cl::NoFlags, false);
25 cl::Flag DumpAsm ("d", "Print assembly as parsed", cl::Hidden, false);
27 int main(int argc, char **argv) {
28 cl::ParseCommandLineOptions(argc, argv, " llvm .ll -> .bc assembler\n");
30 std::ostream *Out = 0;
32 // Parse the file now...
33 std::auto_ptr<Module> M(ParseAssemblyFile(InputFilename));
35 cerr << "assembly didn't read correctly.\n";
39 if (DumpAsm) cerr << "Here's the assembly:\n" << M.get();
41 if (OutputFilename != "") { // Specified an output filename?
42 if (!Force && std::ifstream(OutputFilename.c_str())) {
43 // If force is not specified, make sure not to overwrite a file!
44 cerr << "Error opening '" << OutputFilename << "': File exists!\n"
45 << "Use -f command line argument to force output\n";
48 Out = new std::ofstream(OutputFilename.c_str());
50 if (InputFilename == "-") {
54 std::string IFN = InputFilename;
55 int Len = IFN.length();
56 if (IFN[Len-3] == '.' && IFN[Len-2] == 'l' && IFN[Len-1] == 'l') {
58 OutputFilename = std::string(IFN.begin(), IFN.end()-3);
60 OutputFilename = IFN; // Append a .bc to it
62 OutputFilename += ".bc";
64 if (!Force && std::ifstream(OutputFilename.c_str())) {
65 // If force is not specified, make sure not to overwrite a file!
66 cerr << "Error opening '" << OutputFilename << "': File exists!\n"
67 << "Use -f command line argument to force output\n";
71 Out = new std::ofstream(OutputFilename.c_str());
72 // Make sure that the Out file gets unlink'd from the disk if we get a
74 RemoveFileOnSignal(OutputFilename);
79 cerr << "Error opening " << OutputFilename << "!\n";
83 WriteBytecodeToFile(M.get(), *Out);
84 } catch (const ParseException &E) {
85 cerr << E.getMessage() << std::endl;
89 if (Out != &std::cout) delete Out;