/// Bundle the files. Return true if an error was found.
static bool BundleFiles() {
std::error_code EC;
// Create output file.
raw_fd_ostream OutputFile(OutputFileNames.front(), EC, sys::fs::F_None);
if (EC) {
errs() << "error: Can't open file " << OutputFileNames.front() << ".\n";
return true;
}
// Open input files.
std::vector<std::unique_ptr<MemoryBuffer>> InputBuffers(
InputFileNames.size());
unsigned Idx = 0;
for (auto &I : InputFileNames) {
ErrorOr<std::unique_ptr<MemoryBuffer>> CodeOrErr =
MemoryBuffer::getFileOrSTDIN(I);
if (std::error_code EC = CodeOrErr.getError()) {
errs() << "error: Can't open file " << I << ": " << EC.message() << "\n";
return true;
}
InputBuffers[Idx++] = std::move(CodeOrErr.get());
}
// Get the file handler. We use the host buffer as reference.
assert(HostInputIndex != ~0u && "Host input index undefined??");
std::unique_ptr<FileHandler> FH;
FH.reset(CreateFileHandler(*InputBuffers[HostInputIndex].get()));
// Quit if we don't have a handler.
if (!FH.get())
return true;
// Write header.
FH.get()->WriteHeader(OutputFile, InputBuffers);
// Write all bundles along with the start/end markers. If an error was found
// writing the end of the bundle component, abort the bundle writing.
auto Input = InputBuffers.begin();
for (auto &Triple : TargetNames) {
FH.get()->WriteBundleStart(OutputFile, Triple);
FH.get()->WriteBundle(OutputFile, *Input->get());
if (FH.get()->WriteBundleEnd(OutputFile, Triple))
return true;
++Input;
}
return false;
}
// main - Entry point for the llc compiler.
//
int main(int argc, char **argv) {
sys::PrintStackTraceOnErrorSignal();
PrettyStackTraceProgram X(argc, argv);
// Enable debug stream buffering.
EnableDebugBuffering = true;
LLVMContext &Context = getGlobalContext();
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
// Initialize targets first, so that --version shows registered targets.
InitializeAllTargets();
InitializeAllTargetMCs();
InitializeAllAsmPrinters();
InitializeAllAsmParsers();
// Initialize codegen and IR passes used by llc so that the -print-after,
// -print-before, and -stop-after options work.
PassRegistry *Registry = PassRegistry::getPassRegistry();
initializeCore(*Registry);
initializeCodeGen(*Registry);
initializeLoopStrengthReducePass(*Registry);
initializeLowerIntrinsicsPass(*Registry);
initializeUnreachableBlockElimPass(*Registry);
// Register the target printer for --version.
cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n");
// Load the module to be compiled...
SMDiagnostic Err;
std::auto_ptr<Module> M;
Module *mod = 0;
Triple TheTriple;
bool SkipModule = MCPU == "help" ||
(!MAttrs.empty() && MAttrs.front() == "help");
// If user just wants to list available options, skip module loading
if (!SkipModule) {
M.reset(ParseIRFile(InputFilename, Err, Context));
mod = M.get();
if (mod == 0) {
Err.print(argv[0], errs());
return 1;
}
// If we are supposed to override the target triple, do so now.
if (!TargetTriple.empty())
mod->setTargetTriple(Triple::normalize(TargetTriple));
TheTriple = Triple(mod->getTargetTriple());
} else {
TheTriple = Triple(Triple::normalize(TargetTriple));
}
if (TheTriple.getTriple().empty())
TheTriple.setTriple(sys::getDefaultTargetTriple());
// Get the target specific parser.
std::string Error;
const Target *TheTarget = TargetRegistry::lookupTarget(MArch, TheTriple,
Error);
if (!TheTarget) {
errs() << argv[0] << ": " << Error;
return 1;
}
// Package up features to be passed to target/subtarget
std::string FeaturesStr;
if (MAttrs.size()) {
SubtargetFeatures Features;
for (unsigned i = 0; i != MAttrs.size(); ++i)
Features.AddFeature(MAttrs[i]);
FeaturesStr = Features.getString();
}
CodeGenOpt::Level OLvl = CodeGenOpt::Default;
switch (OptLevel) {
default:
errs() << argv[0] << ": invalid optimization level.\n";
return 1;
case ' ': break;
case '0': OLvl = CodeGenOpt::None; break;
case '1': OLvl = CodeGenOpt::Less; break;
case '2': OLvl = CodeGenOpt::Default; break;
case '3': OLvl = CodeGenOpt::Aggressive; break;
}
TargetOptions Options;
Options.LessPreciseFPMADOption = EnableFPMAD;
Options.NoFramePointerElim = DisableFPElim;
Options.NoFramePointerElimNonLeaf = DisableFPElimNonLeaf;
Options.AllowFPOpFusion = FuseFPOps;
Options.UnsafeFPMath = EnableUnsafeFPMath;
Options.NoInfsFPMath = EnableNoInfsFPMath;
Options.NoNaNsFPMath = EnableNoNaNsFPMath;
Options.HonorSignDependentRoundingFPMathOption =
EnableHonorSignDependentRoundingFPMath;
Options.UseSoftFloat = GenerateSoftFloatCalls;
if (FloatABIForCalls != FloatABI::Default)
Options.FloatABIType = FloatABIForCalls;
Options.NoZerosInBSS = DontPlaceZerosInBSS;
Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
Options.DisableTailCalls = DisableTailCalls;
Options.StackAlignmentOverride = OverrideStackAlignment;
Options.RealignStack = EnableRealignStack;
Options.TrapFuncName = TrapFuncName;
Options.PositionIndependentExecutable = EnablePIE;
Options.EnableSegmentedStacks = SegmentedStacks;
Options.UseInitArray = UseInitArray;
std::auto_ptr<TargetMachine>
target(TheTarget->createTargetMachine(TheTriple.getTriple(),
MCPU, FeaturesStr, Options,
RelocModel, CMModel, OLvl));
assert(target.get() && "Could not allocate target machine!");
assert(mod && "Should have exited after outputting help!");
TargetMachine &Target = *target.get();
if (DisableDotLoc)
Target.setMCUseLoc(false);
if (DisableCFI)
Target.setMCUseCFI(false);
if (EnableDwarfDirectory)
Target.setMCUseDwarfDirectory(true);
if (GenerateSoftFloatCalls)
FloatABIForCalls = FloatABI::Soft;
// Disable .loc support for older OS X versions.
if (TheTriple.isMacOSX() &&
TheTriple.isMacOSXVersionLT(10, 6))
Target.setMCUseLoc(false);
// Figure out where we are going to send the output.
OwningPtr<tool_output_file> Out
(GetOutputStream(TheTarget->getName(), TheTriple.getOS(), argv[0]));
if (!Out) return 1;
// Build up all of the passes that we want to do to the module.
PassManager PM;
// Add an appropriate TargetLibraryInfo pass for the module's triple.
TargetLibraryInfo *TLI = new TargetLibraryInfo(TheTriple);
if (DisableSimplifyLibCalls)
TLI->disableAllFunctions();
PM.add(TLI);
// Add the target data from the target machine, if it exists, or the module.
if (const TargetData *TD = Target.getTargetData())
PM.add(new TargetData(*TD));
else
PM.add(new TargetData(mod));
// Override default to generate verbose assembly.
Target.setAsmVerbosityDefault(true);
if (RelaxAll) {
if (FileType != TargetMachine::CGFT_ObjectFile)
errs() << argv[0]
<< ": warning: ignoring -mc-relax-all because filetype != obj";
else
Target.setMCRelaxAll(true);
}
{
formatted_raw_ostream FOS(Out->os());
AnalysisID StartAfterID = 0;
AnalysisID StopAfterID = 0;
const PassRegistry *PR = PassRegistry::getPassRegistry();
if (!StartAfter.empty()) {
const PassInfo *PI = PR->getPassInfo(StartAfter);
if (!PI) {
errs() << argv[0] << ": start-after pass is not registered.\n";
return 1;
}
StartAfterID = PI->getTypeInfo();
}
if (!StopAfter.empty()) {
const PassInfo *PI = PR->getPassInfo(StopAfter);
if (!PI) {
errs() << argv[0] << ": stop-after pass is not registered.\n";
return 1;
}
StopAfterID = PI->getTypeInfo();
}
// Ask the target to add backend passes as necessary.
if (Target.addPassesToEmitFile(PM, FOS, FileType, NoVerify,
StartAfterID, StopAfterID)) {
errs() << argv[0] << ": target does not support generation of this"
<< " file type!\n";
return 1;
}
// Before executing passes, print the final values of the LLVM options.
cl::PrintOptionValues();
PM.run(*mod);
}
// Declare success.
Out->keep();
return 0;
}
// Unbundle the files. Return true if an error was found.
static bool UnbundleFiles() {
// Open Input file.
ErrorOr<std::unique_ptr<MemoryBuffer>> CodeOrErr =
MemoryBuffer::getFileOrSTDIN(InputFileNames.front());
if (std::error_code EC = CodeOrErr.getError()) {
errs() << "error: Can't open file " << InputFileNames.front() << ": "
<< EC.message() << "\n";
return true;
}
MemoryBuffer &Input = *CodeOrErr.get();
// Select the right files handler.
std::unique_ptr<FileHandler> FH;
FH.reset(CreateFileHandler(Input));
// Quit if we don't have a handler.
if (!FH.get())
return true;
// Read the header of the bundled file.
FH.get()->ReadHeader(Input);
// Create a work list that consist of the map triple/output file.
StringMap<StringRef> Worklist;
auto Output = OutputFileNames.begin();
for (auto &Triple : TargetNames) {
Worklist[Triple] = *Output;
++Output;
}
// Read all the bundles that are in the work list. If we find no bundles we
// assume the file is meant for the host target.
bool FoundHostBundle = false;
while (!Worklist.empty()) {
StringRef CurTriple = FH.get()->ReadBundleStart(Input);
// We don't have more bundles.
if (CurTriple.empty())
break;
auto Output = Worklist.find(CurTriple);
// The file may have more bundles for other targets, that we don't care
// about. Therefore, move on to the next triple
if (Output == Worklist.end()) {
continue;
}
// Check if the output file can be opened and copy the bundle to it.
std::error_code EC;
raw_fd_ostream OutputFile(Output->second, EC, sys::fs::F_None);
if (EC) {
errs() << "error: Can't open file " << Output->second << ": "
<< EC.message() << "\n";
return true;
}
FH.get()->ReadBundle(OutputFile, Input);
FH.get()->ReadBundleEnd(Input);
Worklist.erase(Output);
// Record if we found the host bundle.
if (hasHostKind(CurTriple))
FoundHostBundle = true;
}
// If no bundles were found, assume the input file is the host bundle and
// create empty files for the remaining targets.
if (Worklist.size() == TargetNames.size()) {
for (auto &E : Worklist) {
std::error_code EC;
raw_fd_ostream OutputFile(E.second, EC, sys::fs::F_None);
if (EC) {
errs() << "error: Can't open file " << E.second << ": " << EC.message()
<< "\n";
return true;
}
// If this entry has a host kind, copy the input file to the output file.
if (hasHostKind(E.first()))
OutputFile.write(Input.getBufferStart(), Input.getBufferSize());
}
return false;
}
// If we found elements, we emit an error if none of those were for the host.
if (!FoundHostBundle) {
errs() << "error: Can't find bundle for the host target\n";
return true;
}
// If we still have any elements in the worklist, create empty files for them.
for (auto &E : Worklist) {
std::error_code EC;
raw_fd_ostream OutputFile(E.second, EC, sys::fs::F_None);
if (EC) {
errs() << "error: Can't open file " << E.second << ": " << EC.message()
<< "\n";
return true;
}
}
return false;
}
bool WriteBundleEnd(raw_fd_ostream &OS, StringRef TargetTriple) final {
assert(NumberOfProcessedInputs <= NumberOfInputs &&
"Processing more inputs that actually exist!");
assert(HostInputIndex != ~0u && "Host input index not defined.");
// If this is not the last output, we don't have to do anything.
if (NumberOfProcessedInputs != NumberOfInputs)
return false;
// Create the bitcode file name to write the resulting code to. Keep it if
// save-temps is active.
SmallString<128> BitcodeFileName;
if (sys::fs::createTemporaryFile("clang-offload-bundler", "bc",
BitcodeFileName)) {
errs() << "error: unable to create temporary file.\n";
return true;
}
// Dump the contents of the temporary file if that was requested.
if (DumpTemporaryFiles) {
errs() << ";\n; Object file bundler IR file.\n;\n";
AuxModule.get()->print(errs(), nullptr,
/*ShouldPreserveUseListOrder=*/false,
/*IsForDebug=*/true);
errs() << '\n';
}
// Find clang in order to create the bundle binary.
StringRef Dir = sys::path::parent_path(BundlerExecutable);
auto ClangBinary = sys::findProgramByName("clang", Dir);
if (ClangBinary.getError()) {
// Remove bitcode file.
sys::fs::remove(BitcodeFileName);
errs() << "error: unable to find 'clang' in path.\n";
return true;
}
// Do the incremental linking. We write to the output file directly. So, we
// close it and use the name to pass down to clang.
OS.close();
SmallString<128> TargetName = getTriple(TargetNames[HostInputIndex]);
std::vector<StringRef> ClangArgs = {"clang",
"-r",
"-target",
TargetName.c_str(),
"-o",
OutputFileNames.front().c_str(),
InputFileNames[HostInputIndex].c_str(),
BitcodeFileName.c_str(),
"-nostdlib"};
// If the user asked for the commands to be printed out, we do that instead
// of executing it.
if (PrintExternalCommands) {
errs() << "\"" << ClangBinary.get() << "\"";
for (StringRef Arg : ClangArgs)
errs() << " \"" << Arg << "\"";
errs() << "\n";
} else {
// Write the bitcode contents to the temporary file.
{
std::error_code EC;
raw_fd_ostream BitcodeFile(BitcodeFileName, EC, sys::fs::F_None);
if (EC) {
errs() << "error: unable to open temporary file.\n";
return true;
}
WriteBitcodeToFile(*AuxModule, BitcodeFile);
}
bool Failed = sys::ExecuteAndWait(ClangBinary.get(), ClangArgs);
// Remove bitcode file.
sys::fs::remove(BitcodeFileName);
if (Failed) {
errs() << "error: incremental linking by external tool failed.\n";
return true;
}
}
return false;
}