Esempio n. 1
0
void initCodegen() {
    llvm::InitializeNativeTarget();
    llvm::InitializeNativeTargetAsmPrinter();
    llvm::InitializeNativeTargetAsmParser();

    g.stdlib_module = loadStdlib();

    llvm::EngineBuilder eb(new llvm::Module("empty_initial_module", g.context));
    eb.setEngineKind(llvm::EngineKind::JIT); // specify we only want the JIT, and not the interpreter fallback
    eb.setUseMCJIT(true);
    eb.setMCJITMemoryManager(createMemoryManager());
    // eb.setOptLevel(llvm::CodeGenOpt::None); // -O0
    // eb.setOptLevel(llvm::CodeGenOpt::Less); // -O1
    // eb.setOptLevel(llvm::CodeGenOpt::Default); // -O2, -Os
    // eb.setOptLevel(llvm::CodeGenOpt::Aggressive); // -O3

    llvm::TargetOptions target_options;
    target_options.NoFramePointerElim = true;
    // target_options.EnableFastISel = true;
    eb.setTargetOptions(target_options);

    g.tm = eb.selectTarget();
    assert(g.tm && "failed to get a target machine");
    g.engine = eb.create(g.tm);
    assert(g.engine && "engine creation failed?");

    // g.engine->setObjectCache(new MyObjectCache());

    g.i1 = llvm::Type::getInt1Ty(g.context);
    g.i8 = llvm::Type::getInt8Ty(g.context);
    g.i8_ptr = g.i8->getPointerTo();
    g.i32 = llvm::Type::getInt32Ty(g.context);
    g.i64 = llvm::Type::getInt64Ty(g.context);
    g.void_ = llvm::Type::getVoidTy(g.context);
    g.double_ = llvm::Type::getDoubleTy(g.context);

    std::vector<llvm::JITEventListener*> listeners = makeJITEventListeners();
    for (int i = 0; i < listeners.size(); i++) {
        g.jit_listeners.push_back(listeners[i]);
        g.engine->RegisterJITEventListener(listeners[i]);
    }

    llvm::JITEventListener* stackmap_listener = makeStackMapListener();
    g.jit_listeners.push_back(stackmap_listener);
    g.engine->RegisterJITEventListener(stackmap_listener);

    llvm::JITEventListener* registry_listener = makeRegistryListener();
    g.jit_listeners.push_back(registry_listener);
    g.engine->RegisterJITEventListener(registry_listener);

    llvm::JITEventListener* tracebacks_listener = makeTracebacksListener();
    g.jit_listeners.push_back(tracebacks_listener);
    g.engine->RegisterJITEventListener(tracebacks_listener);

    if (SHOW_DISASM) {
        llvm::JITEventListener* listener = new PystonJITEventListener();
        g.jit_listeners.push_back(listener);
        g.engine->RegisterJITEventListener(listener);
    }

    initGlobalFuncs(g);

    setupRuntime();

    signal(SIGFPE, &handle_sigfpe);

    // There are some parts of llvm that are only configurable through command line args,
    // so construct a fake argc/argv pair and pass it to the llvm command line machinery:
    const char* llvm_args[] = {
        "fake_name", "--enable-stackmap-liveness", "--enable-patchpoint-liveness",

// Enabling and debugging fast-isel:
//"--fast-isel",
//"--fast-isel-verbose",
////"--fast-isel-abort",
#ifndef NDEBUG
//"--debug-only=debug-ir",
//"--debug-only=regalloc",
//"--debug-only=stackmaps",
#endif
        //"--print-after-all",
        //"--print-machineinstrs",
    };
    int num_llvm_args = sizeof(llvm_args) / sizeof(llvm_args[0]);
    llvm::cl::ParseCommandLineOptions(num_llvm_args, llvm_args, "<you should never see this>\n");
}
Esempio n. 2
0
void initCodegen() {
    llvm::InitializeNativeTarget();
    llvm::InitializeNativeTargetAsmPrinter();
    llvm::InitializeNativeTargetAsmParser();

    g.stdlib_module = loadStdlib();

#if LLVMREV < 215967
    llvm::EngineBuilder eb(new llvm::Module("empty_initial_module", g.context));
#else
    llvm::EngineBuilder eb(std::unique_ptr<llvm::Module>(new llvm::Module("empty_initial_module", g.context)));
#endif

#if LLVMREV < 216982
    eb.setUseMCJIT(true);
#endif

    eb.setEngineKind(llvm::EngineKind::JIT); // specify we only want the JIT, and not the interpreter fallback
#if LLVMREV < 223183
    eb.setMCJITMemoryManager(createMemoryManager().release());
#else
    eb.setMCJITMemoryManager(createMemoryManager());
#endif
    // eb.setOptLevel(llvm::CodeGenOpt::None); // -O0
    // eb.setOptLevel(llvm::CodeGenOpt::Less); // -O1
    // eb.setOptLevel(llvm::CodeGenOpt::Default); // -O2, -Os
    // eb.setOptLevel(llvm::CodeGenOpt::Aggressive); // -O3

    llvm::TargetOptions target_options;
    target_options.NoFramePointerElim = true;
    // target_options.EnableFastISel = true;
    eb.setTargetOptions(target_options);

    // TODO enable this?  should let us get better code:
    // eb.setMCPU(llvm::sys::getHostCPUName());

    g.tm = eb.selectTarget();
    assert(g.tm && "failed to get a target machine");
    g.engine = eb.create(g.tm);
    assert(g.engine && "engine creation failed?");

    if (ENABLE_JIT_OBJECT_CACHE) {
        g.object_cache = new PystonObjectCache;
        g.engine->setObjectCache(g.object_cache);
    }

    g.i1 = llvm::Type::getInt1Ty(g.context);
    g.i8 = llvm::Type::getInt8Ty(g.context);
    g.i8_ptr = g.i8->getPointerTo();
    g.i32 = llvm::Type::getInt32Ty(g.context);
    g.i64 = llvm::Type::getInt64Ty(g.context);
    g.void_ = llvm::Type::getVoidTy(g.context);
    g.double_ = llvm::Type::getDoubleTy(g.context);

    std::vector<llvm::JITEventListener*> listeners = makeJITEventListeners();
    for (int i = 0; i < listeners.size(); i++) {
        g.jit_listeners.push_back(listeners[i]);
        g.engine->RegisterJITEventListener(listeners[i]);
    }

    llvm::JITEventListener* stackmap_listener = makeStackMapListener();
    g.jit_listeners.push_back(stackmap_listener);
    g.engine->RegisterJITEventListener(stackmap_listener);

#if ENABLE_INTEL_JIT_EVENTS
    llvm::JITEventListener* intel_listener = llvm::JITEventListener::createIntelJITEventListener();
    g.jit_listeners.push_back(intel_listener);
    g.engine->RegisterJITEventListener(intel_listener);
#endif

    llvm::JITEventListener* registry_listener = makeRegistryListener();
    g.jit_listeners.push_back(registry_listener);
    g.engine->RegisterJITEventListener(registry_listener);

    llvm::JITEventListener* tracebacks_listener = makeTracebacksListener();
    g.jit_listeners.push_back(tracebacks_listener);
    g.engine->RegisterJITEventListener(tracebacks_listener);

    if (SHOW_DISASM) {
#if LLVMREV < 216983
        llvm::JITEventListener* listener = new DisassemblerJITEventListener();
        g.jit_listeners.push_back(listener);
        g.engine->RegisterJITEventListener(listener);
#else
        fprintf(stderr, "The LLVM disassembler has been removed\n");
        abort();
#endif
    }

    initGlobalFuncs(g);

    setupRuntime();

// signal(SIGFPE, &handle_sigfpe);
// signal(SIGUSR1, &handle_sigusr1);

#if ENABLE_SAMPLING_PROFILER
    struct itimerval prof_timer;
    prof_timer.it_value.tv_sec = prof_timer.it_interval.tv_sec = 0;
    prof_timer.it_value.tv_usec = prof_timer.it_interval.tv_usec = 1000;
    signal(SIGPROF, handle_sigprof);
    setitimer(ITIMER_PROF, &prof_timer, NULL);
#endif

#ifdef INVESTIGATE_STAT_TIMER
    struct itimerval prof_timer;
    prof_timer.it_value.tv_sec = prof_timer.it_interval.tv_sec = 0;
    prof_timer.it_value.tv_usec = prof_timer.it_interval.tv_usec = 1000;
    signal(SIGPROF, handle_sigprof_investigate_stattimer);
    setitimer(ITIMER_PROF, &prof_timer, NULL);
#endif

    // There are some parts of llvm that are only configurable through command line args,
    // so construct a fake argc/argv pair and pass it to the llvm command line machinery:
    std::vector<const char*> llvm_args = { "fake_name" };

    llvm_args.push_back("--enable-patchpoint-liveness");
    if (0) {
        // Enabling and debugging fast-isel:
        // llvm_args.push_back("--fast-isel");
        // llvm_args.push_back("--fast-isel-verbose");
        ////llvm_args.push_back("--fast-isel-abort");
    }

#ifndef NDEBUG
// llvm_args.push_back("--debug-only=debug-ir");
// llvm_args.push_back("--debug-only=regalloc");
// llvm_args.push_back("--debug-only=stackmaps");
#endif

    // llvm_args.push_back("--time-passes");

    // llvm_args.push_back("--print-after-all");
    // llvm_args.push_back("--print-machineinstrs");
    if (USE_REGALLOC_BASIC)
        llvm_args.push_back("--regalloc=basic");

    llvm::cl::ParseCommandLineOptions(llvm_args.size(), &llvm_args[0], "<you should never see this>\n");
}