1//===- KaleidoscopeJIT.h - A simple JIT for Kaleidoscope --------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// Contains a simple JIT definition for use in the kaleidoscope tutorials.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_EXECUTIONENGINE_ORC_KALEIDOSCOPEJIT_H
14#define LLVM_EXECUTIONENGINE_ORC_KALEIDOSCOPEJIT_H
15
16#include "llvm/ADT/StringRef.h"
17#include "llvm/ExecutionEngine/Orc/CompileUtils.h"
18#include "llvm/ExecutionEngine/Orc/Core.h"
19#include "llvm/ExecutionEngine/Orc/ExecutionUtils.h"
20#include "llvm/ExecutionEngine/Orc/ExecutorProcessControl.h"
21#include "llvm/ExecutionEngine/Orc/IRCompileLayer.h"
22#include "llvm/ExecutionEngine/Orc/JITTargetMachineBuilder.h"
23#include "llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h"
24#include "llvm/ExecutionEngine/Orc/Shared/ExecutorSymbolDef.h"
25#include "llvm/ExecutionEngine/SectionMemoryManager.h"
26#include "llvm/IR/DataLayout.h"
27#include "llvm/IR/LLVMContext.h"
28#include <memory>
29
30namespace llvm {
31namespace orc {
32
33class KaleidoscopeJIT {
34private:
35 std::unique_ptr<ExecutionSession> ES;
36
37 DataLayout DL;
38 MangleAndInterner Mangle;
39
40 RTDyldObjectLinkingLayer ObjectLayer;
41 IRCompileLayer CompileLayer;
42
43 JITDylib &MainJD;
44
45public:
46 KaleidoscopeJIT(std::unique_ptr<ExecutionSession> ES,
47 JITTargetMachineBuilder JTMB, DataLayout DL)
48 : ES(std::move(ES)), DL(std::move(DL)), Mangle(*this->ES, this->DL),
49 ObjectLayer(*this->ES,
50 []() { return std::make_unique<SectionMemoryManager>(); }),
51 CompileLayer(*this->ES, ObjectLayer,
52 std::make_unique<ConcurrentIRCompiler>(args: std::move(JTMB))),
53 MainJD(this->ES->createBareJITDylib(Name: "<main>")) {
54 MainJD.addGenerator(
55 DefGenerator: cantFail(ValOrErr: DynamicLibrarySearchGenerator::GetForCurrentProcess(
56 GlobalPrefix: DL.getGlobalPrefix())));
57 }
58
59 ~KaleidoscopeJIT() {
60 if (auto Err = ES->endSession())
61 ES->reportError(Err: std::move(Err));
62 }
63
64 static Expected<std::unique_ptr<KaleidoscopeJIT>> Create() {
65 auto EPC = SelfExecutorProcessControl::Create();
66 if (!EPC)
67 return EPC.takeError();
68
69 auto ES = std::make_unique<ExecutionSession>(args: std::move(*EPC));
70
71 JITTargetMachineBuilder JTMB(
72 ES->getExecutorProcessControl().getTargetTriple());
73
74 auto DL = JTMB.getDefaultDataLayoutForTarget();
75 if (!DL)
76 return DL.takeError();
77
78 return std::make_unique<KaleidoscopeJIT>(args: std::move(ES), args: std::move(JTMB),
79 args: std::move(*DL));
80 }
81
82 const DataLayout &getDataLayout() const { return DL; }
83
84 JITDylib &getMainJITDylib() { return MainJD; }
85
86 Error addModule(ThreadSafeModule TSM, ResourceTrackerSP RT = nullptr) {
87 if (!RT)
88 RT = MainJD.getDefaultResourceTracker();
89 return CompileLayer.add(RT, TSM: std::move(TSM));
90 }
91
92 Expected<ExecutorSymbolDef> lookup(StringRef Name) {
93 return ES->lookup(SearchOrder: {&MainJD}, Symbol: Mangle(Name.str()));
94 }
95};
96
97} // end namespace orc
98} // end namespace llvm
99
100#endif // LLVM_EXECUTIONENGINE_ORC_KALEIDOSCOPEJIT_H
101

source code of llvm/examples/Kaleidoscope/BuildingAJIT/Chapter1/KaleidoscopeJIT.h