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122 lines
4.0 KiB
C++
122 lines
4.0 KiB
C++
//===--- llvm-as.cpp - The low-level LLVM assembler -----------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This utility may be invoked in the following manner:
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// llvm-as --help - Output information about command line switches
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// llvm-as [options] - Read LLVM asm from stdin, write bytecode to stdout
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// llvm-as [options] x.ll - Read LLVM asm from the x.ll file, write bytecode
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// to the x.bc file.
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//
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//===------------------------------------------------------------------------===
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#include "llvm/Module.h"
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#include "llvm/Assembly/Parser.h"
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#include "llvm/Bytecode/Writer.h"
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#include "llvm/Analysis/Verifier.h"
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#include "Support/CommandLine.h"
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#include "Support/Signals.h"
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#include <fstream>
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#include <memory>
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static cl::opt<std::string>
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InputFilename(cl::Positional, cl::desc("<input .llvm file>"), cl::init("-"));
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static cl::opt<std::string>
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OutputFilename("o", cl::desc("Override output filename"),
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cl::value_desc("filename"));
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static cl::opt<bool>
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Force("f", cl::desc("Overwrite output files"));
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static cl::opt<bool>
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DumpAsm("d", cl::desc("Print assembly as parsed"), cl::Hidden);
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static cl::opt<bool>
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DisableVerify("disable-verify", cl::Hidden,
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cl::desc("Do not run verifier on input LLVM (dangerous!"));
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int main(int argc, char **argv) {
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cl::ParseCommandLineOptions(argc, argv, " llvm .ll -> .bc assembler\n");
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std::ostream *Out = 0;
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try {
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// Parse the file now...
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std::auto_ptr<Module> M(ParseAssemblyFile(InputFilename));
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if (M.get() == 0) {
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std::cerr << argv[0] << ": assembly didn't read correctly.\n";
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return 1;
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}
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if (!DisableVerify && verifyModule(*M.get())) {
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std::cerr << argv[0]
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<< ": assembly parsed, but does not verify as correct!\n";
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return 1;
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}
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if (DumpAsm) std::cerr << "Here's the assembly:\n" << M.get();
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if (OutputFilename != "") { // Specified an output filename?
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if (OutputFilename != "-") { // Not stdout?
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if (!Force && std::ifstream(OutputFilename.c_str())) {
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// If force is not specified, make sure not to overwrite a file!
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std::cerr << argv[0] << ": error opening '" << OutputFilename
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<< "': file exists!\n"
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<< "Use -f command line argument to force output\n";
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return 1;
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}
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Out = new std::ofstream(OutputFilename.c_str());
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} else { // Specified stdout
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Out = &std::cout;
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}
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} else {
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if (InputFilename == "-") {
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OutputFilename = "-";
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Out = &std::cout;
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} else {
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std::string IFN = InputFilename;
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int Len = IFN.length();
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if (IFN[Len-3] == '.' && IFN[Len-2] == 'l' && IFN[Len-1] == 'l') {
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// Source ends in .ll
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OutputFilename = std::string(IFN.begin(), IFN.end()-3);
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} else {
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OutputFilename = IFN; // Append a .bc to it
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}
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OutputFilename += ".bc";
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if (!Force && std::ifstream(OutputFilename.c_str())) {
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// If force is not specified, make sure not to overwrite a file!
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std::cerr << argv[0] << ": error opening '" << OutputFilename
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<< "': file exists!\n"
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<< "Use -f command line argument to force output\n";
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return 1;
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}
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Out = new std::ofstream(OutputFilename.c_str());
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// Make sure that the Out file gets unlinked from the disk if we get a
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// SIGINT
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RemoveFileOnSignal(OutputFilename);
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}
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}
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if (!Out->good()) {
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std::cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
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return 1;
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}
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WriteBytecodeToFile(M.get(), *Out);
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} catch (const ParseException &E) {
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std::cerr << argv[0] << ": " << E.getMessage() << "\n";
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return 1;
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}
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if (Out != &std::cout) delete Out;
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return 0;
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}
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