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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/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:
ExecutionSession ES;
RTDyldObjectLinkingLayer ObjectLayer;
IRCompileLayer CompileLayer;
IRTransformLayer OptimizeLayer;
DataLayout DL;
MangleAndInterner Mangle;
ThreadSafeContext Ctx;
public:
KaleidoscopeJIT(JITTargetMachineBuilder JTMB, DataLayout DL)
: ObjectLayer(ES,
[]() { return std::make_unique<SectionMemoryManager>(); }),
CompileLayer(ES, ObjectLayer, ConcurrentIRCompiler(std::move(JTMB))),
OptimizeLayer(ES, CompileLayer, optimizeModule),
DL(std::move(DL)), Mangle(ES, this->DL),
Ctx(std::make_unique<LLVMContext>()) {
ES.getMainJITDylib().addGenerator(
cantFail(DynamicLibrarySearchGenerator::GetForCurrentProcess(
DL.getGlobalPrefix())));
}
const DataLayout &getDataLayout() const { return DL; }
LLVMContext &getContext() { return *Ctx.getContext(); }
static Expected<std::unique_ptr<KaleidoscopeJIT>> Create() {
auto JTMB = JITTargetMachineBuilder::detectHost();
if (!JTMB)
return JTMB.takeError();
auto DL = JTMB->getDefaultDataLayoutForTarget();
if (!DL)
return DL.takeError();
return std::make_unique<KaleidoscopeJIT>(std::move(*JTMB), std::move(*DL));
}
Error addModule(std::unique_ptr<Module> M) {
return OptimizeLayer.add(ES.getMainJITDylib(),
ThreadSafeModule(std::move(M), Ctx));
}
Expected<JITEvaluatedSymbol> lookup(StringRef Name) {
return ES.lookup({&ES.getMainJITDylib()}, 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 TSM;
}
};
} // end namespace orc
} // end namespace llvm
#endif // LLVM_EXECUTIONENGINE_ORC_KALEIDOSCOPEJIT_H
|