/// selectTarget - Pick a target either via -march or by guessing the native
/// arch. Add any CPU features specified via -mcpu or -mattr.
TargetMachine *MCJIT::selectTarget(Module *Mod,
StringRef MArch,
StringRef MCPU,
const SmallVectorImpl<std::string>& MAttrs,
std::string *ErrorStr) {
Triple TheTriple(Mod->getTargetTriple());
if (TheTriple.getTriple().empty())
TheTriple.setTriple(sys::getHostTriple());
// Adjust the triple to match what the user requested.
const Target *TheTarget = 0;
if (!MArch.empty()) {
for (TargetRegistry::iterator it = TargetRegistry::begin(),
ie = TargetRegistry::end(); it != ie; ++it) {
if (MArch == it->getName()) {
TheTarget = &*it;
break;
}
}
if (!TheTarget) {
*ErrorStr = "No available targets are compatible with this -march, "
"see -version for the available targets.\n";
return 0;
}
// Adjust the triple to match (if known), otherwise stick with the
// module/host triple.
Triple::ArchType Type = Triple::getArchTypeForLLVMName(MArch);
if (Type != Triple::UnknownArch)
TheTriple.setArch(Type);
} else {
std::string Error;
TheTarget = TargetRegistry::lookupTarget(TheTriple.getTriple(), Error);
if (TheTarget == 0) {
if (ErrorStr)
*ErrorStr = Error;
return 0;
}
}
if (!TheTarget->hasJIT()) {
errs() << "WARNING: This target JIT is not designed for the host you are"
<< " running. If bad things happen, please choose a different "
<< "-march switch.\n";
}
// Package up features to be passed to target/subtarget
std::string FeaturesStr;
if (!MCPU.empty() || !MAttrs.empty()) {
SubtargetFeatures Features;
Features.setCPU(MCPU);
for (unsigned i = 0; i != MAttrs.size(); ++i)
Features.AddFeature(MAttrs[i]);
FeaturesStr = Features.getString();
}
// Allocate a target...
TargetMachine *Target =
TheTarget->createTargetMachine(TheTriple.getTriple(), FeaturesStr);
assert(Target && "Could not allocate target machine!");
return Target;
}
// 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();
InitializeAllAsmPrinters();
InitializeAllAsmParsers();
cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n");
// Load the module to be compiled...
SMDiagnostic Err;
std::auto_ptr<Module> M;
M.reset(ParseIRFile(InputFilename, Err, Context));
if (M.get() == 0) {
Err.Print(argv[0], errs());
return 1;
}
Module &mod = *M.get();
// If we are supposed to override the target triple, do so now.
if (!TargetTriple.empty())
mod.setTargetTriple(Triple::normalize(TargetTriple));
Triple TheTriple(mod.getTargetTriple());
if (TheTriple.getTriple().empty())
TheTriple.setTriple(sys::getHostTriple());
// Allocate target machine. First, check whether the user has explicitly
// specified an architecture to compile for. If so we have to look it up by
// name, because it might be a backend that has no mapping to a target triple.
const Target *TheTarget = 0;
if (!MArch.empty()) {
for (TargetRegistry::iterator it = TargetRegistry::begin(),
ie = TargetRegistry::end(); it != ie; ++it) {
if (MArch == it->getName()) {
TheTarget = &*it;
break;
}
}
if (!TheTarget) {
errs() << argv[0] << ": error: invalid target '" << MArch << "'.\n";
return 1;
}
// Adjust the triple to match (if known), otherwise stick with the
// module/host triple.
Triple::ArchType Type = Triple::getArchTypeForLLVMName(MArch);
if (Type != Triple::UnknownArch)
TheTriple.setArch(Type);
} else {
std::string Err;
TheTarget = TargetRegistry::lookupTarget(TheTriple.getTriple(), Err);
if (TheTarget == 0) {
errs() << argv[0] << ": error auto-selecting target for module '"
<< Err << "'. Please use the -march option to explicitly "
<< "pick a target.\n";
return 1;
}
}
// Package up features to be passed to target/subtarget
std::string FeaturesStr;
if (MCPU.size() || MAttrs.size()) {
SubtargetFeatures Features;
Features.setCPU(MCPU);
for (unsigned i = 0; i != MAttrs.size(); ++i)
Features.AddFeature(MAttrs[i]);
FeaturesStr = Features.getString();
}
std::auto_ptr<TargetMachine>
target(TheTarget->createTargetMachine(TheTriple.getTriple(), FeaturesStr));
assert(target.get() && "Could not allocate target machine!");
TargetMachine &Target = *target.get();
if (DisableDotLoc)
Target.setMCUseLoc(false);
if (TheTriple.getOS() == Triple::Darwin) {
switch (TheTriple.getDarwinMajorNumber()) {
case 7:
case 8:
case 9:
// disable .loc support for older darwin OS.
Target.setMCUseLoc(false);
break;
default:
break;
}
}
// 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;
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;
}
// Build up all of the passes that we want to do to the module.
PassManager PM;
// 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());
// Ask the target to add backend passes as necessary.
if (Target.addPassesToEmitFile(PM, FOS, FileType, OLvl, NoVerify)) {
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;
}
// main - Entry point for the llc compiler.
//
int main(int argc, char **argv) {
llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n");
sys::PrintStackTraceOnErrorSignal();
// Load the module to be compiled...
std::string ErrorMessage;
std::auto_ptr<Module> M;
std::auto_ptr<MemoryBuffer> Buffer(
MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage));
if (Buffer.get())
M.reset(ParseBitcodeFile(Buffer.get(), &ErrorMessage));
if (M.get() == 0) {
std::cerr << argv[0] << ": bitcode didn't read correctly.\n";
std::cerr << "Reason: " << ErrorMessage << "\n";
return 1;
}
Module &mod = *M.get();
// If we are supposed to override the target triple, do so now.
if (!TargetTriple.empty())
mod.setTargetTriple(TargetTriple);
// Allocate target machine. First, check whether the user has
// explicitly specified an architecture to compile for.
if (MArch == 0) {
std::string Err;
MArch = TargetMachineRegistry::getClosestStaticTargetForModule(mod, Err);
if (MArch == 0) {
std::cerr << argv[0] << ": error auto-selecting target for module '"
<< Err << "'. Please use the -march option to explicitly "
<< "pick a target.\n";
return 1;
}
}
// Package up features to be passed to target/subtarget
std::string FeaturesStr;
if (MCPU.size() || MAttrs.size()) {
SubtargetFeatures Features;
Features.setCPU(MCPU);
for (unsigned i = 0; i != MAttrs.size(); ++i)
Features.AddFeature(MAttrs[i]);
FeaturesStr = Features.getString();
}
std::auto_ptr<TargetMachine> target(MArch->CtorFn(mod, FeaturesStr));
assert(target.get() && "Could not allocate target machine!");
TargetMachine &Target = *target.get();
// Figure out where we are going to send the output...
std::ostream *Out = GetOutputStream(argv[0]);
if (Out == 0) return 1;
// If this target requires addPassesToEmitWholeFile, do it now. This is
// used by strange things like the C backend.
if (Target.WantsWholeFile()) {
PassManager PM;
PM.add(new TargetData(*Target.getTargetData()));
if (!NoVerify)
PM.add(createVerifierPass());
// Ask the target to add backend passes as necessary.
if (Target.addPassesToEmitWholeFile(PM, *Out, FileType, Fast)) {
std::cerr << argv[0] << ": target does not support generation of this"
<< " file type!\n";
if (Out != &std::cout) delete Out;
// And the Out file is empty and useless, so remove it now.
sys::Path(OutputFilename).eraseFromDisk();
return 1;
}
PM.run(mod);
} else {
// Build up all of the passes that we want to do to the module.
ExistingModuleProvider Provider(M.release());
FunctionPassManager Passes(&Provider);
Passes.add(new TargetData(*Target.getTargetData()));
#ifndef NDEBUG
if (!NoVerify)
Passes.add(createVerifierPass());
#endif
// Ask the target to add backend passes as necessary.
MachineCodeEmitter *MCE = 0;
switch (Target.addPassesToEmitFile(Passes, *Out, FileType, Fast)) {
default:
assert(0 && "Invalid file model!");
return 1;
case FileModel::Error:
std::cerr << argv[0] << ": target does not support generation of this"
<< " file type!\n";
if (Out != &std::cout) delete Out;
// And the Out file is empty and useless, so remove it now.
sys::Path(OutputFilename).eraseFromDisk();
return 1;
case FileModel::AsmFile:
break;
case FileModel::MachOFile:
MCE = AddMachOWriter(Passes, *Out, Target);
break;
case FileModel::ElfFile:
MCE = AddELFWriter(Passes, *Out, Target);
break;
}
if (Target.addPassesToEmitFileFinish(Passes, MCE, Fast)) {
std::cerr << argv[0] << ": target does not support generation of this"
<< " file type!\n";
if (Out != &std::cout) delete Out;
// And the Out file is empty and useless, so remove it now.
sys::Path(OutputFilename).eraseFromDisk();
return 1;
}
Passes.doInitialization();
// Run our queue of passes all at once now, efficiently.
// TODO: this could lazily stream functions out of the module.
for (Module::iterator I = mod.begin(), E = mod.end(); I != E; ++I)
if (!I->isDeclaration())
Passes.run(*I);
Passes.doFinalization();
}
// Delete the ostream if it's not a stdout stream
if (Out != &std::cout) delete Out;
return 0;
}
// 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();
InitializeAllAsmPrinters();
cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n");
// Load the module to be compiled...
SMDiagnostic Err;
std::auto_ptr<Module> M;
M.reset(ParseIRFile(InputFilename, Err, Context));
if (M.get() == 0) {
Err.Print(argv[0], errs());
return 1;
}
Module &mod = *M.get();
// If we are supposed to override the target triple, do so now.
if (!TargetTriple.empty())
mod.setTargetTriple(TargetTriple);
Triple TheTriple(mod.getTargetTriple());
if (TheTriple.getTriple().empty())
TheTriple.setTriple(sys::getHostTriple());
// Allocate target machine. First, check whether the user has explicitly
// specified an architecture to compile for. If so we have to look it up by
// name, because it might be a backend that has no mapping to a target triple.
const Target *TheTarget = 0;
if (!MArch.empty()) {
for (TargetRegistry::iterator it = TargetRegistry::begin(),
ie = TargetRegistry::end(); it != ie; ++it) {
if (MArch == it->getName()) {
TheTarget = &*it;
break;
}
}
if (!TheTarget) {
errs() << argv[0] << ": error: invalid target '" << MArch << "'.\n";
return 1;
}
// Adjust the triple to match (if known), otherwise stick with the
// module/host triple.
Triple::ArchType Type = Triple::getArchTypeForLLVMName(MArch);
if (Type != Triple::UnknownArch)
TheTriple.setArch(Type);
} else {
std::string Err;
TheTarget = TargetRegistry::lookupTarget(TheTriple.getTriple(), Err);
if (TheTarget == 0) {
errs() << argv[0] << ": error auto-selecting target for module '"
<< Err << "'. Please use the -march option to explicitly "
<< "pick a target.\n";
return 1;
}
}
// Package up features to be passed to target/subtarget
std::string FeaturesStr;
if (MCPU.size() || MAttrs.size()) {
SubtargetFeatures Features;
Features.setCPU(MCPU);
for (unsigned i = 0; i != MAttrs.size(); ++i)
Features.AddFeature(MAttrs[i]);
FeaturesStr = Features.getString();
}
std::auto_ptr<TargetMachine>
target(TheTarget->createTargetMachine(TheTriple.getTriple(), FeaturesStr));
assert(target.get() && "Could not allocate target machine!");
TargetMachine &Target = *target.get();
// Figure out where we are going to send the output...
formatted_raw_ostream *Out = GetOutputStream(TheTarget->getName(), argv[0]);
if (Out == 0) return 1;
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;
}
// Request that addPassesToEmitFile run the Verifier after running
// passes which modify the IR.
#ifndef NDEBUG
bool DisableVerify = false;
#else
bool DisableVerify = true;
#endif
// If this target requires addPassesToEmitWholeFile, do it now. This is
// used by strange things like the C backend.
if (Target.WantsWholeFile()) {
PassManager PM;
// 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));
if (!NoVerify)
PM.add(createVerifierPass());
// Ask the target to add backend passes as necessary.
if (Target.addPassesToEmitWholeFile(PM, *Out, FileType, OLvl,
DisableVerify)) {
errs() << argv[0] << ": target does not support generation of this"
<< " file type!\n";
if (Out != &fouts()) delete Out;
// And the Out file is empty and useless, so remove it now.
sys::Path(OutputFilename).eraseFromDisk();
return 1;
}
PM.run(mod);
} else {
// Build up all of the passes that we want to do to the module.
FunctionPassManager Passes(M.get());
// Add the target data from the target machine, if it exists, or the module.
if (const TargetData *TD = Target.getTargetData())
Passes.add(new TargetData(*TD));
else
Passes.add(new TargetData(&mod));
#ifndef NDEBUG
if (!NoVerify)
Passes.add(createVerifierPass());
#endif
// Override default to generate verbose assembly.
Target.setAsmVerbosityDefault(true);
if (Target.addPassesToEmitFile(Passes, *Out, FileType, OLvl,
DisableVerify)) {
errs() << argv[0] << ": target does not support generation of this"
<< " file type!\n";
if (Out != &fouts()) delete Out;
// And the Out file is empty and useless, so remove it now.
sys::Path(OutputFilename).eraseFromDisk();
return 1;
}
Passes.doInitialization();
// Run our queue of passes all at once now, efficiently.
// TODO: this could lazily stream functions out of the module.
for (Module::iterator I = mod.begin(), E = mod.end(); I != E; ++I)
if (!I->isDeclaration()) {
if (DisableRedZone)
I->addFnAttr(Attribute::NoRedZone);
if (NoImplicitFloats)
I->addFnAttr(Attribute::NoImplicitFloat);
Passes.run(*I);
}
Passes.doFinalization();
}
// Delete the ostream if it's not a stdout stream
if (Out != &fouts()) delete Out;
return 0;
}
bool BackendConsumer::AddEmitPasses() {
if (Action == Backend_EmitNothing)
return true;
if (Action == Backend_EmitBC) {
getPerModulePasses()->add(createBitcodeWriterPass(FormattedOutStream));
} else if (Action == Backend_EmitLL) {
getPerModulePasses()->add(createPrintModulePass(&FormattedOutStream));
} else {
bool Fast = CodeGenOpts.OptimizationLevel == 0;
// Create the TargetMachine for generating code.
std::string Error;
std::string Triple = TheModule->getTargetTriple();
const llvm::Target *TheTarget = TargetRegistry::lookupTarget(Triple, Error);
if (!TheTarget) {
Diags.Report(diag::err_fe_unable_to_create_target) << Error;
return false;
}
// FIXME: Expose these capabilities via actual APIs!!!! Aside from just
// being gross, this is also totally broken if we ever care about
// concurrency.
llvm::NoFramePointerElim = CodeGenOpts.DisableFPElim;
if (CodeGenOpts.FloatABI == "soft")
llvm::FloatABIType = llvm::FloatABI::Soft;
else if (CodeGenOpts.FloatABI == "hard")
llvm::FloatABIType = llvm::FloatABI::Hard;
else {
assert(CodeGenOpts.FloatABI.empty() && "Invalid float abi!");
llvm::FloatABIType = llvm::FloatABI::Default;
}
NoZerosInBSS = CodeGenOpts.NoZeroInitializedInBSS;
llvm::UseSoftFloat = CodeGenOpts.SoftFloat;
UnwindTablesMandatory = CodeGenOpts.UnwindTables;
TargetMachine::setAsmVerbosityDefault(CodeGenOpts.AsmVerbose);
// FIXME: Parse this earlier.
if (CodeGenOpts.RelocationModel == "static") {
TargetMachine::setRelocationModel(llvm::Reloc::Static);
} else if (CodeGenOpts.RelocationModel == "pic") {
TargetMachine::setRelocationModel(llvm::Reloc::PIC_);
} else {
assert(CodeGenOpts.RelocationModel == "dynamic-no-pic" &&
"Invalid PIC model!");
TargetMachine::setRelocationModel(llvm::Reloc::DynamicNoPIC);
}
// FIXME: Parse this earlier.
if (CodeGenOpts.CodeModel == "small") {
TargetMachine::setCodeModel(llvm::CodeModel::Small);
} else if (CodeGenOpts.CodeModel == "kernel") {
TargetMachine::setCodeModel(llvm::CodeModel::Kernel);
} else if (CodeGenOpts.CodeModel == "medium") {
TargetMachine::setCodeModel(llvm::CodeModel::Medium);
} else if (CodeGenOpts.CodeModel == "large") {
TargetMachine::setCodeModel(llvm::CodeModel::Large);
} else {
assert(CodeGenOpts.CodeModel.empty() && "Invalid code model!");
TargetMachine::setCodeModel(llvm::CodeModel::Default);
}
std::vector<const char *> BackendArgs;
BackendArgs.push_back("clang"); // Fake program name.
if (!CodeGenOpts.DebugPass.empty()) {
BackendArgs.push_back("-debug-pass");
BackendArgs.push_back(CodeGenOpts.DebugPass.c_str());
}
if (!CodeGenOpts.LimitFloatPrecision.empty()) {
BackendArgs.push_back("-limit-float-precision");
BackendArgs.push_back(CodeGenOpts.LimitFloatPrecision.c_str());
}
if (llvm::TimePassesIsEnabled)
BackendArgs.push_back("-time-passes");
BackendArgs.push_back(0);
llvm::cl::ParseCommandLineOptions(BackendArgs.size() - 1,
(char**) &BackendArgs[0]);
std::string FeaturesStr;
if (TargetOpts.CPU.size() || TargetOpts.Features.size()) {
SubtargetFeatures Features;
Features.setCPU(TargetOpts.CPU);
for (std::vector<std::string>::const_iterator
it = TargetOpts.Features.begin(),
ie = TargetOpts.Features.end(); it != ie; ++it)
Features.AddFeature(*it);
FeaturesStr = Features.getString();
}
TargetMachine *TM = TheTarget->createTargetMachine(Triple, FeaturesStr);
// Set register scheduler & allocation policy.
RegisterScheduler::setDefault(createDefaultScheduler);
RegisterRegAlloc::setDefault(Fast ? createLocalRegisterAllocator :
createLinearScanRegisterAllocator);
// From llvm-gcc:
// If there are passes we have to run on the entire module, we do codegen
// as a separate "pass" after that happens.
// FIXME: This is disabled right now until bugs can be worked out. Reenable
// this for fast -O0 compiles!
FunctionPassManager *PM = getCodeGenPasses();
CodeGenOpt::Level OptLevel = CodeGenOpt::Default;
switch (CodeGenOpts.OptimizationLevel) {
default: break;
case 0: OptLevel = CodeGenOpt::None; break;
case 3: OptLevel = CodeGenOpt::Aggressive; break;
}
// Normal mode, emit a .s or .o file by running the code generator. Note,
// this also adds codegenerator level optimization passes.
TargetMachine::CodeGenFileType CGFT = TargetMachine::CGFT_AssemblyFile;
if (Action == Backend_EmitObj)
CGFT = TargetMachine::CGFT_ObjectFile;
if (TM->addPassesToEmitFile(*PM, FormattedOutStream, CGFT, OptLevel)) {
Diags.Report(diag::err_fe_unable_to_interface_with_target);
return false;
}
}
return true;
}
