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