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#include "llvm/ExecutionEngine/Orc/CompileOnDemandLayer.h"
#include "llvm/ExecutionEngine/Orc/CompileUtils.h"
#include "llvm/ExecutionEngine/Orc/Core.h"
#include "llvm/ExecutionEngine/Orc/ExecutionUtils.h"
#include "llvm/ExecutionEngine/Orc/IRCompileLayer.h"
#include "llvm/ExecutionEngine/Orc/IndirectionUtils.h"
#include "llvm/ExecutionEngine/Orc/JITTargetMachineBuilder.h"
#include "llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h"
#include "llvm/ExecutionEngine/Orc/SpeculateAnalyses.h"
#include "llvm/ExecutionEngine/Orc/Speculation.h"
#include "llvm/ExecutionEngine/Orc/TargetProcess/TargetExecutionUtils.h"
#include "llvm/ExecutionEngine/SectionMemoryManager.h"
#include "llvm/IRReader/IRReader.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/ThreadPool.h"
#include <list>
#include <string>
using namespace llvm;
using namespace llvm::orc;
static cl::list<std::string> InputFiles(cl::Positional, cl::OneOrMore,
cl::desc("input files"));
static cl::list<std::string> InputArgv("args", cl::Positional,
cl::desc("<program arguments>..."),
cl::ZeroOrMore, cl::PositionalEatsArgs);
static cl::opt<unsigned> NumThreads("num-threads", cl::Optional,
cl::desc("Number of compile threads"),
cl::init(4));
ExitOnError ExitOnErr;
// Add Layers
class SpeculativeJIT {
public:
static Expected<std::unique_ptr<SpeculativeJIT>> Create() {
auto JTMB = orc::JITTargetMachineBuilder::detectHost();
if (!JTMB)
return JTMB.takeError();
auto DL = JTMB->getDefaultDataLayoutForTarget();
if (!DL)
return DL.takeError();
auto EPC = SelfExecutorProcessControl::Create();
if (!EPC)
return EPC.takeError();
auto ES = std::make_unique<ExecutionSession>(std::move(*EPC));
auto LCTMgr = createLocalLazyCallThroughManager(
JTMB->getTargetTriple(), *ES,
pointerToJITTargetAddress(explodeOnLazyCompileFailure));
if (!LCTMgr)
return LCTMgr.takeError();
auto ISMBuilder =
createLocalIndirectStubsManagerBuilder(JTMB->getTargetTriple());
if (!ISMBuilder)
return make_error<StringError>("No indirect stubs manager for target",
inconvertibleErrorCode());
auto ProcessSymbolsSearchGenerator =
DynamicLibrarySearchGenerator::GetForCurrentProcess(
DL->getGlobalPrefix());
if (!ProcessSymbolsSearchGenerator)
return ProcessSymbolsSearchGenerator.takeError();
std::unique_ptr<SpeculativeJIT> SJ(new SpeculativeJIT(
std::move(ES), std::move(*DL), std::move(*JTMB), std::move(*LCTMgr),
std::move(ISMBuilder), std::move(*ProcessSymbolsSearchGenerator)));
return std::move(SJ);
}
ExecutionSession &getES() { return *ES; }
Error addModule(ThreadSafeModule TSM) {
return CODLayer.add(MainJD, std::move(TSM));
}
Expected<JITEvaluatedSymbol> lookup(StringRef UnmangledName) {
return ES->lookup({&MainJD}, Mangle(UnmangledName));
}
~SpeculativeJIT() { CompileThreads.wait(); }
private:
using IndirectStubsManagerBuilderFunction =
std::function<std::unique_ptr<IndirectStubsManager>()>;
static void explodeOnLazyCompileFailure() {
errs() << "Lazy compilation failed, Symbol Implmentation not found!\n";
exit(1);
}
SpeculativeJIT(
std::unique_ptr<ExecutionSession> ES, DataLayout DL,
orc::JITTargetMachineBuilder JTMB,
std::unique_ptr<LazyCallThroughManager> LCTMgr,
IndirectStubsManagerBuilderFunction ISMBuilder,
std::unique_ptr<DynamicLibrarySearchGenerator> ProcessSymbolsGenerator)
: ES(std::move(ES)), DL(std::move(DL)),
MainJD(this->ES->createBareJITDylib("<main>")), LCTMgr(std::move(LCTMgr)),
CompileLayer(*this->ES, ObjLayer,
std::make_unique<ConcurrentIRCompiler>(std::move(JTMB))),
S(Imps, *this->ES),
SpeculateLayer(*this->ES, CompileLayer, S, Mangle, BlockFreqQuery()),
CODLayer(*this->ES, SpeculateLayer, *this->LCTMgr,
std::move(ISMBuilder)) {
MainJD.addGenerator(std::move(ProcessSymbolsGenerator));
this->CODLayer.setImplMap(&Imps);
this->ES->setDispatchTask(
[this](std::unique_ptr<Task> T) {
CompileThreads.async(
[UnownedT = T.release()]() {
std::unique_ptr<Task> T(UnownedT);
T->run();
});
});
ExitOnErr(S.addSpeculationRuntime(MainJD, Mangle));
LocalCXXRuntimeOverrides CXXRuntimeoverrides;
ExitOnErr(CXXRuntimeoverrides.enable(MainJD, Mangle));
}
static std::unique_ptr<SectionMemoryManager> createMemMgr() {
return std::make_unique<SectionMemoryManager>();
}
std::unique_ptr<ExecutionSession> ES;
DataLayout DL;
MangleAndInterner Mangle{*ES, DL};
ThreadPool CompileThreads{llvm::hardware_concurrency(NumThreads)};
JITDylib &MainJD;
Triple TT;
std::unique_ptr<LazyCallThroughManager> LCTMgr;
IRCompileLayer CompileLayer;
ImplSymbolMap Imps;
Speculator S;
RTDyldObjectLinkingLayer ObjLayer{*ES, createMemMgr};
IRSpeculationLayer SpeculateLayer;
CompileOnDemandLayer CODLayer;
};
int main(int argc, char *argv[]) {
// Initialize LLVM.
InitLLVM X(argc, argv);
InitializeNativeTarget();
InitializeNativeTargetAsmPrinter();
cl::ParseCommandLineOptions(argc, argv, "SpeculativeJIT");
ExitOnErr.setBanner(std::string(argv[0]) + ": ");
if (NumThreads < 1) {
errs() << "Speculative compilation requires one or more dedicated compile "
"threads\n";
return 1;
}
// Create a JIT instance.
auto SJ = ExitOnErr(SpeculativeJIT::Create());
// Load the IR inputs.
for (const auto &InputFile : InputFiles) {
SMDiagnostic Err;
auto Ctx = std::make_unique<LLVMContext>();
auto M = parseIRFile(InputFile, Err, *Ctx);
if (!M) {
Err.print(argv[0], errs());
return 1;
}
ExitOnErr(SJ->addModule(ThreadSafeModule(std::move(M), std::move(Ctx))));
}
auto MainSym = ExitOnErr(SJ->lookup("main"));
auto Main =
jitTargetAddressToFunction<int (*)(int, char *[])>(MainSym.getAddress());
return runAsMain(Main, InputArgv, StringRef(InputFiles.front()));
return 0;
}
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