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//===------------------------------------------------------------------------===
// LLVM 'AS' UTILITY
//
// This utility may be invoked in the following manner:
// as --help - Output information about command line switches
// as [options] - Read LLVM assembly from stdin, write bytecode to stdout
// as [options] x.ll - Read LLVM assembly from the x.ll file, write bytecode
// to the x.bc file.
//
//===------------------------------------------------------------------------===
#include "llvm/Module.h"
#include "llvm/Assembly/Parser.h"
#include "llvm/Bytecode/Writer.h"
#include "Support/CommandLine.h"
#include <fstream>
#include <string>
#include <memory>
cl::String InputFilename ("", "Parse <arg> file, compile to bytecode", 0, "-");
cl::String OutputFilename("o", "Override output filename", cl::NoFlags, "");
cl::Flag Force ("f", "Overwrite output files", cl::NoFlags, false);
cl::Flag DumpAsm ("d", "Print assembly as parsed", cl::Hidden, false);
int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv, " llvm .ll -> .bc assembler\n");
ostream *Out = 0;
try {
// Parse the file now...
std::auto_ptr<Module> M(ParseAssemblyFile(InputFilename));
if (M.get() == 0) {
cerr << "assembly didn't read correctly.\n";
return 1;
}
if (DumpAsm) {
cerr << "Here's the assembly:\n";
M.get()->dump();
}
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 << "Error opening '" << OutputFilename << "': File exists!\n"
<< "Use -f command line argument to force output\n";
return 1;
}
Out = new std::ofstream(OutputFilename.c_str());
} else {
if (InputFilename == "-") {
OutputFilename = "-";
Out = &cout;
} else {
std::string IFN = InputFilename;
int Len = IFN.length();
if (IFN[Len-3] == '.' && IFN[Len-2] == 'l' && IFN[Len-1] == 'l') {
// Source ends in .ll
OutputFilename = std::string(IFN.begin(), IFN.end()-3);
} else {
OutputFilename = IFN; // Append a .bc to it
}
OutputFilename += ".bc";
if (!Force && std::ifstream(OutputFilename.c_str())) {
// If force is not specified, make sure not to overwrite a file!
cerr << "Error opening '" << OutputFilename << "': File exists!\n"
<< "Use -f command line argument to force output\n";
return 1;
}
Out = new std::ofstream(OutputFilename.c_str());
}
}
if (!Out->good()) {
cerr << "Error opening " << OutputFilename << "!\n";
return 1;
}
WriteBytecodeToFile(M.get(), *Out);
} catch (const ParseException &E) {
cerr << E.getMessage() << endl;
return 1;
}
if (Out != &cout) delete Out;
return 0;
}
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