/// create - Create an return a new JIT compiler if there is one available
/// for the current target. Otherwise, return null.
///
ExecutionEngine *JIT::create(ModuleProvider *MP, IntrinsicLowering *IL) {
if (MArch == 0) {
std::string Error;
MArch = TargetMachineRegistry::getClosestTargetForJIT(Error);
if (MArch == 0) return 0;
} else if (MArch->JITMatchQualityFn() == 0) {
std::cerr << "WARNING: This target JIT is not designed for the host you are"
<< " running. If bad things happen, please choose a different "
<< "-march switch.\n";
}
// Allocate a target...
TargetMachine *Target = MArch->CtorFn(*MP->getModule(), IL);
assert(Target && "Could not allocate target machine!");
// If the target supports JIT code generation, return a new JIT now.
if (TargetJITInfo *TJ = Target->getJITInfo())
return new JIT(MP, *Target, *TJ);
return 0;
}
// main - Entry point for the llc compiler.
//
int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv, " llvm system compiler\n");
PrintStackTraceOnErrorSignal();
// Load the module to be compiled...
std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
if (M.get() == 0) {
std::cerr << argv[0] << ": bytecode didn't read correctly.\n";
return 1;
}
Module &mod = *M.get();
// Allocate target machine. First, check whether the user has
// explicitly specified an architecture to compile for.
TargetMachine* (*TargetMachineAllocator)(const Module&,
IntrinsicLowering *) = 0;
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;
}
}
std::auto_ptr<TargetMachine> target(MArch->CtorFn(mod, 0));
assert(target.get() && "Could not allocate target machine!");
TargetMachine &Target = *target.get();
const TargetData &TD = Target.getTargetData();
// Build up all of the passes that we want to do to the module...
PassManager Passes;
Passes.add(new TargetData("llc", TD.isLittleEndian(), TD.getPointerSize(),
TD.getPointerAlignment(), TD.getDoubleAlignment()));
// Figure out where we are going to send the output...
std::ostream *Out = 0;
if (OutputFilename != "") {
if (OutputFilename != "-") {
// Specified an output filename?
if (!Force && std::ifstream(OutputFilename.c_str())) {
// If force is not specified, make sure not to overwrite a file!
std::cerr << argv[0] << ": error opening '" << OutputFilename
<< "': file exists!\n"
<< "Use -f command line argument to force output\n";
return 1;
}
Out = new std::ofstream(OutputFilename.c_str());
// Make sure that the Out file gets unlinked from the disk if we get a
// SIGINT
RemoveFileOnSignal(OutputFilename);
} else {
Out = &std::cout;
}
} else {
if (InputFilename == "-") {
OutputFilename = "-";
Out = &std::cout;
} else {
OutputFilename = GetFileNameRoot(InputFilename);
if (MArch->Name[0] != 'c' || MArch->Name[1] != 0) // not CBE
OutputFilename += ".s";
else
OutputFilename += ".cbe.c";
if (!Force && std::ifstream(OutputFilename.c_str())) {
// If force is not specified, make sure not to overwrite a file!
std::cerr << argv[0] << ": error opening '" << OutputFilename
<< "': file exists!\n"
<< "Use -f command line argument to force output\n";
return 1;
}
Out = new std::ofstream(OutputFilename.c_str());
if (!Out->good()) {
std::cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
delete Out;
return 1;
}
// Make sure that the Out file gets unlinked from the disk if we get a
// SIGINT
RemoveFileOnSignal(OutputFilename);
}
}
// Ask the target to add backend passes as necessary
if (Target.addPassesToEmitAssembly(Passes, *Out)) {
std::cerr << argv[0] << ": target '" << Target.getName()
<< "' does not support static compilation!\n";
if (Out != &std::cout) delete Out;
// And the Out file is empty and useless, so remove it now.
std::remove(OutputFilename.c_str());
return 1;
} else {
// Run our queue of passes all at once now, efficiently.
Passes.run(*M.get());
}
// 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) {
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;
}
