1 //===------------------------------------------------------------------------=== 2 // LLVM 'AS' UTILITY 3 // 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 8 // to the x.bc file. 9 // 10 //===------------------------------------------------------------------------=== 11 12 #include <iostream.h> 13 #include <fstream.h> 14 #include <string> 15 #include "llvm/Module.h" 16 #include "llvm/Assembly/Parser.h" 17 #include "llvm/Assembly/Writer.h" 18 #include "llvm/Bytecode/Writer.h" 19 #include "llvm/Support/CommandLine.h" 20 21 cl::String InputFilename ("", "Parse <arg> file, compile to bytecode", 0, "-"); 22 cl::String OutputFilename("o", "Override output filename", cl::NoFlags, ""); 23 cl::Flag Force ("f", "Overwrite output files", cl::NoFlags, false); 24 cl::Flag DumpAsm ("d", "Print assembly as parsed", cl::Hidden, false); 25 26 int main(int argc, char **argv) { 27 cl::ParseCommandLineOptions(argc, argv, " llvm .ll -> .bc assembler\n"); 28 29 ostream *Out = 0; 30 try { 31 // Parse the file now... 32 Module *C = ParseAssemblyFile(InputFilename); 33 if (C == 0) { 34 cerr << "assembly didn't read correctly.\n"; 35 return 1; 36 } 37 38 if (DumpAsm) 39 cerr << "Here's the assembly:\n" << C; 40 41 if (OutputFilename != "") { // Specified an output filename? 42 Out = new ofstream(OutputFilename.c_str(), 43 (Force ? 0 : ios::noreplace)|ios::out); 44 } else { 45 if (InputFilename == "-") { 46 OutputFilename = "-"; 47 Out = &cout; 48 } else { 49 string IFN = InputFilename; 50 int Len = IFN.length(); 51 if (IFN[Len-3] == '.' && IFN[Len-2] == 'l' && IFN[Len-1] == 'l') { 52 // Source ends in .ll 53 OutputFilename = string(IFN.begin(), IFN.end()-3); 54 } else { 55 OutputFilename = IFN; // Append a .bc to it 56 } 57 OutputFilename += ".bc"; 58 Out = new ofstream(OutputFilename.c_str(), 59 (Force ? 0 : ios::noreplace)|ios::out); 60 } 61 62 if (!Out->good()) { 63 cerr << "Error opening " << OutputFilename << "!\n"; 64 delete C; 65 return 1; 66 } 67 } 68 69 WriteBytecodeToFile(C, *Out); 70 71 delete C; 72 } catch (const ParseException &E) { 73 cerr << E.getMessage() << endl; 74 return 1; 75 } 76 77 if (Out != &cout) delete Out; 78 return 0; 79 } 80 81