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//===- lto-bugpoing.cpp - The lto-bugpoint driver -------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// lto-bugpoint tool identifies minmal set of bitcode files that is causing
// failure when Link Time Optimization is enabled. The failure is identified
// using developer provided validation script.
//
//===----------------------------------------------------------------------===//
#include "LTOBugPoint.h"
#include <iostream>
#include <fstream>
int main(int argc, char **argv) {
try {
if (argc != 4) {
std::cerr << "Invalid number of lto-bugpoint arguments!\n";
return 1;
}
std::ios::openmode input_mode = std::ios::in;
// First argument is linker command line options file. This text file
// is a list of linker command line options, one option per line.
// First line always list the absolute path to invoke the linker.
std::istream *LinkerArgsFile = new std::ifstream(argv[1], input_mode);
if (!LinkerArgsFile->good()) {
std::cerr << argv[0] << ": error opening " << argv[1] << "!\n";
return 1;
}
// Second argment is a text file that includes the linker input
// file paths, one input file path per line.
std::istream *LinkerInputsFile = new std::ifstream(argv[2], input_mode);
if (!LinkerInputsFile->good()) {
std::cerr << argv[0] << ": error opening " << argv[2] << "!\n";
delete LinkerArgsFile;
return 1;
}
// Third argument is absolute path to the validation script. This
// script is used to validate LTO error under investigation.
std::string ValidationScript = argv[3];
LTOBugPoint bugFinder(*LinkerArgsFile, *LinkerInputsFile);
llvm::SmallVector<std::string, 4> TroubleMakers;
if (!bugFinder.findTroubleMakers(TroubleMakers, ValidationScript)) {
std::cerr << "lto-bugpoint:" << bugFinder.getErrMsg() << "\n";
return 1;
}
return 0;
} catch (const std::string& msg) {
std::cerr << argv[0] << ": " << msg << "\n";
} catch (...) {
std::cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
}
return 1;
}
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