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//===--- llvm-upgrade.cpp - The LLVM Assembly Upgrader --------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Reid Spencer and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This utility will upgrade LLVM 1.9 Assembly to 2.0 format. It may be
// invoked as a filter, like this:
// llvm-1.9/bin/llvm-dis < 1.9.bc | llvm-upgrade | llvm-as > 2.0.bc
//
// or, you can directly upgrade, like this:
// llvm-upgrade -o 2.0.ll < 1.9.ll
//
// llvm-upgrade won't overwrite files by default. Use -f to force it to
// overwrite the output file.
//
//===----------------------------------------------------------------------===//
#include "ParserInternals.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/Streams.h"
#include "llvm/Support/SystemUtils.h"
#include "llvm/System/Signals.h"
#include <fstream>
#include <iostream>
#include <memory>
using namespace llvm;
static cl::opt<std::string>
InputFilename(cl::Positional, cl::desc("<input .llvm file>"), cl::init("-"));
static cl::opt<std::string>
OutputFilename("o", cl::desc("Override output filename"),
cl::value_desc("filename"), cl::init("-"));
static cl::opt<bool>
Force("f", cl::desc("Overwrite output files"));
static cl::opt<bool>
Debug("debug", cl::desc("Print debug output from yacc parser"),cl::Hidden,
cl::init(false));
int main(int argc, char **argv) {
llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
cl::ParseCommandLineOptions(argc, argv, " llvm .ll -> .bc assembler\n");
sys::PrintStackTraceOnErrorSignal();
int exitCode = 0;
std::ostream *Out = 0;
std::istream *In = 0;
try {
if (OutputFilename != "") { // Specified an output filename?
if (OutputFilename != "-") { // Not stdout?
if (!Force && std::ifstream(OutputFilename.c_str())) {
// If force is not specified, make sure not to overwrite a file!
cerr << argv[0] << ": error opening '" << OutputFilename
<< "': file exists!\n"
<< "Use -f command line argument to force output\n";
return 1;
}
Out = new std::ofstream(OutputFilename.c_str(), std::ios::out |
std::ios::trunc);
} else { // Specified stdout
Out = &std::cout;
}
} else {
if (InputFilename == "-") {
OutputFilename = "-";
Out = &std::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 to it
}
OutputFilename += ".llu";
if (!Force && std::ifstream(OutputFilename.c_str())) {
// If force is not specified, make sure not to overwrite a file!
cerr << argv[0] << ": error opening '" << OutputFilename
<< "': file exists!\n"
<< "Use -f command line argument to force output\n";
return 1;
}
Out = new std::ofstream(OutputFilename.c_str(), std::ios::out |
std::ios::trunc);
// Make sure that the Out file gets unlinked from the disk if we get a
// SIGINT
sys::RemoveFileOnSignal(sys::Path(OutputFilename));
}
}
if (InputFilename == "-") {
In = &std::cin;
InputFilename = "<stdin>";
} else {
In = new std::ifstream(InputFilename.c_str());
}
if (!Out->good()) {
cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
return 1;
}
if (!In->good()) {
cerr << argv[0] << ": error opening " << InputFilename << "!\n";
return 1;
}
UpgradeAssembly(InputFilename, *In, *Out, Debug);
} catch (const std::string& caught_message) {
cerr << argv[0] << ": " << caught_message << "\n";
exitCode = 1;
} catch (...) {
cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
exitCode = 1;
}
if (Out != &std::cout) delete Out;
return exitCode;
}
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