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//===--- Main.cpp - The LLVM Compiler Driver --------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open
// Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// llvmc::Main function - driver entry point.
//
//===----------------------------------------------------------------------===//
#include "llvm/CompilerDriver/BuiltinOptions.h"
#include "llvm/CompilerDriver/CompilationGraph.h"
#include "llvm/CompilerDriver/Error.h"
#include "llvm/CompilerDriver/Plugin.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/System/Path.h"
#include <sstream>
#include <stdexcept>
#include <string>
namespace cl = llvm::cl;
namespace sys = llvm::sys;
using namespace llvmc;
namespace {
std::stringstream* GlobalTimeLog;
sys::Path getTempDir() {
sys::Path tempDir;
// The --temp-dir option.
if (!TempDirname.empty()) {
tempDir = TempDirname;
}
// GCC 4.5-style -save-temps handling.
else if (SaveTemps == SaveTempsEnum::Unset) {
tempDir = sys::Path::GetTemporaryDirectory();
return tempDir;
}
else if (SaveTemps == SaveTempsEnum::Obj && !OutputFilename.empty()) {
tempDir = OutputFilename;
tempDir = tempDir.getDirname();
}
else {
// SaveTemps == Cwd --> use current dir (leave tempDir empty).
return tempDir;
}
if (!tempDir.exists()) {
std::string ErrMsg;
if (tempDir.createDirectoryOnDisk(true, &ErrMsg))
throw std::runtime_error(ErrMsg);
}
return tempDir;
}
/// BuildTargets - A small wrapper for CompilationGraph::Build.
int BuildTargets(CompilationGraph& graph, const LanguageMap& langMap) {
int ret;
const sys::Path& tempDir = getTempDir();
bool toDelete = (SaveTemps == SaveTempsEnum::Unset);
try {
ret = graph.Build(tempDir, langMap);
}
catch(...) {
if (toDelete)
tempDir.eraseFromDisk(true);
throw;
}
if (toDelete)
tempDir.eraseFromDisk(true);
return ret;
}
}
namespace llvmc {
// Used to implement -time option. External linkage is intentional.
void AppendToGlobalTimeLog(const std::string& cmd, double time) {
*GlobalTimeLog << "# " << cmd << ' ' << time << '\n';
}
// Sometimes plugins want to condition on the value in argv[0].
const char* ProgramName;
int Main(int argc, char** argv) {
try {
LanguageMap langMap;
CompilationGraph graph;
ProgramName = argv[0];
cl::ParseCommandLineOptions
(argc, argv, "LLVM Compiler Driver (Work In Progress)",
/* ReadResponseFiles = */ false);
PluginLoader Plugins;
Plugins.RunInitialization(langMap, graph);
if (CheckGraph) {
int ret = graph.Check();
if (!ret)
llvm::errs() << "check-graph: no errors found.\n";
return ret;
}
if (ViewGraph) {
graph.viewGraph();
if (!WriteGraph)
return 0;
}
if (WriteGraph) {
graph.writeGraph(OutputFilename.empty()
? std::string("compilation-graph.dot")
: OutputFilename);
return 0;
}
if (Time) {
GlobalTimeLog = new std::stringstream;
GlobalTimeLog->precision(2);
}
int ret = BuildTargets(graph, langMap);
if (Time) {
llvm::errs() << GlobalTimeLog->str();
delete GlobalTimeLog;
}
return ret;
}
catch(llvmc::error_code& ec) {
return ec.code();
}
catch(const std::exception& ex) {
llvm::errs() << argv[0] << ": " << ex.what() << '\n';
}
catch(...) {
llvm::errs() << argv[0] << ": unknown error!\n";
}
return 1;
}
} // end namespace llvmc
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