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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 <iostream.h>
#include <fstream.h>
#include <string>
#include "llvm/Module.h"
#include "llvm/Assembly/Parser.h"
#include "llvm/Assembly/Writer.h"
#include "llvm/Bytecode/Writer.h"
#include "llvm/Tools/CommandLine.h"
cl::String InputFilename ("", "Parse <arg> file, compile to bytecode", 0, "-");
cl::String OutputFilename("o", "Override output filename", 0, "");
cl::Flag Force ("f", "Overwrite output files", 0, 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...
Module *C = ParseAssemblyFile(InputFilename.getValue());
if (C == 0) {
cerr << "assembly didn't read correctly.\n";
return 1;
}
if (DumpAsm.getValue())
cerr << "Here's the assembly:\n" << C;
if (OutputFilename.getValue() != "") { // Specified an output filename?
Out = new ofstream(OutputFilename.getValue().c_str(),
(Force.getValue() ? 0 : ios::noreplace)|ios::out);
} else {
if (InputFilename.getValue() == "-") {
OutputFilename.setValue("-");
Out = &cout;
} else {
string IFN = InputFilename.getValue();
int Len = IFN.length();
if (IFN[Len-3] == '.' && IFN[Len-2] == 'l' && IFN[Len-1] == 'l') {
// Source ends in .ll
OutputFilename.setValue(string(IFN.begin(), IFN.end()-3));
} else {
OutputFilename.setValue(IFN); // Append a .bc to it
}
OutputFilename.setValue(OutputFilename.getValue() + ".bc");
Out = new ofstream(OutputFilename.getValue().c_str(),
(Force.getValue() ? 0 : ios::noreplace)|ios::out);
}
if (!Out->good()) {
cerr << "Error opening " << OutputFilename.getValue() << "!\n";
delete C;
return 1;
}
}
WriteBytecodeToFile(C, *Out);
delete C;
} catch (const ParseException &E) {
cerr << E.getMessage() << endl;
return 1;
}
if (Out != &cout) delete Out;
return 0;
}
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