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//===- KaleidoscopeJIT.h - A simple JIT for Kaleidoscope --------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Contains a simple JIT definition for use in the kaleidoscope tutorials.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_EXECUTIONENGINE_ORC_KALEIDOSCOPEJIT_H
#define LLVM_EXECUTIONENGINE_ORC_KALEIDOSCOPEJIT_H
#include "llvm/ADT/StringRef.h"
#include "llvm/ExecutionEngine/JITSymbol.h"
#include "llvm/ExecutionEngine/Orc/CompileUtils.h"
#include "llvm/ExecutionEngine/Orc/Core.h"
#include "llvm/ExecutionEngine/Orc/ExecutionUtils.h"
#include "llvm/ExecutionEngine/Orc/ExecutorProcessControl.h"
#include "llvm/ExecutionEngine/Orc/IRCompileLayer.h"
#include "llvm/ExecutionEngine/Orc/IRTransformLayer.h"
#include "llvm/ExecutionEngine/Orc/JITTargetMachineBuilder.h"
#include "llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h"
#include "llvm/ExecutionEngine/SectionMemoryManager.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/Transforms/InstCombine/InstCombine.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Transforms/Scalar/GVN.h"
#include <memory>
namespace llvm {
namespace orc {
class KaleidoscopeJIT {
private:
std::unique_ptr<ExecutionSession> ES;
DataLayout DL;
MangleAndInterner Mangle;
RTDyldObjectLinkingLayer ObjectLayer;
IRCompileLayer CompileLayer;
IRTransformLayer OptimizeLayer;
JITDylib &MainJD;
public:
KaleidoscopeJIT(std::unique_ptr<ExecutionSession> ES,
JITTargetMachineBuilder JTMB, DataLayout DL)
: ES(std::move(ES)), DL(std::move(DL)), Mangle(*this->ES, this->DL),
ObjectLayer(*this->ES,
[]() { return std::make_unique<SectionMemoryManager>(); }),
CompileLayer(*this->ES, ObjectLayer,
std::make_unique<ConcurrentIRCompiler>(std::move(JTMB))),
OptimizeLayer(*this->ES, CompileLayer, optimizeModule),
MainJD(this->ES->createBareJITDylib("<main>")) {
MainJD.addGenerator(
cantFail(DynamicLibrarySearchGenerator::GetForCurrentProcess(
DL.getGlobalPrefix())));
}
~KaleidoscopeJIT() {
if (auto Err = ES->endSession())
ES->reportError(std::move(Err));
}
static Expected<std::unique_ptr<KaleidoscopeJIT>> Create() {
auto EPC = SelfExecutorProcessControl::Create();
if (!EPC)
return EPC.takeError();
auto ES = std::make_unique<ExecutionSession>(std::move(*EPC));
JITTargetMachineBuilder JTMB(
ES->getExecutorProcessControl().getTargetTriple());
auto DL = JTMB.getDefaultDataLayoutForTarget();
if (!DL)
return DL.takeError();
return std::make_unique<KaleidoscopeJIT>(std::move(ES), std::move(JTMB),
std::move(*DL));
}
const DataLayout &getDataLayout() const { return DL; }
JITDylib &getMainJITDylib() { return MainJD; }
Error addModule(ThreadSafeModule TSM, ResourceTrackerSP RT = nullptr) {
if (!RT)
RT = MainJD.getDefaultResourceTracker();
return OptimizeLayer.add(RT, std::move(TSM));
}
Expected<JITEvaluatedSymbol> lookup(StringRef Name) {
return ES->lookup({&MainJD}, Mangle(Name.str()));
}
private:
static Expected<ThreadSafeModule>
optimizeModule(ThreadSafeModule TSM, const MaterializationResponsibility &R) {
TSM.withModuleDo([](Module &M) {
// Create a function pass manager.
auto FPM = std::make_unique<legacy::FunctionPassManager>(&M);
// Add some optimizations.
FPM->add(createInstructionCombiningPass());
FPM->add(createReassociatePass());
FPM->add(createGVNPass());
FPM->add(createCFGSimplificationPass());
FPM->doInitialization();
// Run the optimizations over all functions in the module being added to
// the JIT.
for (auto &F : M)
FPM->run(F);
});
return std::move(TSM);
}
};
} // end namespace orc
} // end namespace llvm
#endif // LLVM_EXECUTIONENGINE_ORC_KALEIDOSCOPEJIT_H
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