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"
21 static cl::opt<string>
22 InputFilename(cl::Positional, cl::desc("<input .llvm file>"), cl::init("-"));
24 static cl::opt<string>
25 OutputFilename("o", cl::desc("Override output filename"),
26 cl::value_desc("filename"));
29 Force("f", cl::desc("Overwrite output files"));
32 DumpAsm("d", cl::desc("Print assembly as parsed"), cl::Hidden);
34 int main(int argc, char **argv) {
35 cl::ParseCommandLineOptions(argc, argv, " llvm .ll -> .bc assembler\n");
37 std::ostream *Out = 0;
39 // Parse the file now...
40 std::auto_ptr<Module> M(ParseAssemblyFile(InputFilename));
42 cerr << "assembly didn't read correctly.\n";
46 if (DumpAsm) cerr << "Here's the assembly:\n" << M.get();
48 if (OutputFilename != "") { // Specified an output filename?
49 if (!Force && std::ifstream(OutputFilename.c_str())) {
50 // If force is not specified, make sure not to overwrite a file!
51 cerr << "Error opening '" << OutputFilename << "': File exists!\n"
52 << "Use -f command line argument to force output\n";
55 Out = new std::ofstream(OutputFilename.c_str());
57 if (InputFilename == "-") {
61 std::string IFN = InputFilename;
62 int Len = IFN.length();
63 if (IFN[Len-3] == '.' && IFN[Len-2] == 'l' && IFN[Len-1] == 'l') {
65 OutputFilename = std::string(IFN.begin(), IFN.end()-3);
67 OutputFilename = IFN; // Append a .bc to it
69 OutputFilename += ".bc";
71 if (!Force && std::ifstream(OutputFilename.c_str())) {
72 // If force is not specified, make sure not to overwrite a file!
73 cerr << "Error opening '" << OutputFilename << "': File exists!\n"
74 << "Use -f command line argument to force output\n";
78 Out = new std::ofstream(OutputFilename.c_str());
79 // Make sure that the Out file gets unlink'd from the disk if we get a
81 RemoveFileOnSignal(OutputFilename);
86 cerr << "Error opening " << OutputFilename << "!\n";
90 WriteBytecodeToFile(M.get(), *Out);
91 } catch (const ParseException &E) {
92 cerr << E.getMessage() << std::endl;
96 if (Out != &std::cout) delete Out;