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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/AutoGenerated.h"
#include "llvm/CompilerDriver/BuiltinOptions.h"
#include "llvm/CompilerDriver/CompilationGraph.h"
#include "llvm/CompilerDriver/Error.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/System/Path.h"
#include <sstream>
#include <string>
namespace cl = llvm::cl;
namespace sys = llvm::sys;
using namespace llvmc;
namespace {
std::stringstream* GlobalTimeLog;
/// GetTempDir - Get the temporary directory location. Returns non-zero value
/// on error.
int 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 0;
}
else if (SaveTemps == SaveTempsEnum::Obj && !OutputFilename.empty()) {
tempDir = OutputFilename;
tempDir = tempDir.getDirname();
}
else {
// SaveTemps == Cwd --> use current dir (leave tempDir empty).
return 0;
}
if (!tempDir.exists()) {
std::string ErrMsg;
if (tempDir.createDirectoryOnDisk(true, &ErrMsg)) {
PrintError(ErrMsg);
return 1;
}
}
return 0;
}
/// BuildTargets - A small wrapper for CompilationGraph::Build. Returns
/// non-zero value in case of error.
int BuildTargets(CompilationGraph& graph, const LanguageMap& langMap) {
int ret;
sys::Path tempDir;
bool toDelete = (SaveTemps == SaveTempsEnum::Unset);
if (int ret = GetTempDir(tempDir))
return ret;
ret = graph.Build(tempDir, langMap);
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 user code wants to access the argv[0] value.
const char* ProgramName;
int Main(int argc, char** argv) {
int ret = 0;
LanguageMap langMap;
CompilationGraph graph;
ProgramName = argv[0];
cl::ParseCommandLineOptions
(argc, argv,
/* Overview = */ "LLVM Compiler Driver (Work In Progress)",
/* ReadResponseFiles = */ false);
if (int ret = autogenerated::RunInitialization(langMap, graph))
return ret;
if (CheckGraph) {
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) {
const std::string& Out = (OutputFilename.empty()
? std::string("compilation-graph.dot")
: OutputFilename);
return graph.writeGraph(Out);
}
if (Time) {
GlobalTimeLog = new std::stringstream;
GlobalTimeLog->precision(2);
}
ret = BuildTargets(graph, langMap);
if (Time) {
llvm::errs() << GlobalTimeLog->str();
delete GlobalTimeLog;
}
return ret;
}
} // end namespace llvmc
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