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//===- KaleidoscopeJIT.h - A simple JIT for Kaleidoscope --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// 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/STLExtras.h"
#include "llvm/ExecutionEngine/ExecutionEngine.h"
#include "llvm/ExecutionEngine/JITSymbol.h"
#include "llvm/ExecutionEngine/Orc/CompileOnDemandLayer.h"
#include "llvm/ExecutionEngine/Orc/CompileUtils.h"
#include "llvm/ExecutionEngine/Orc/IRCompileLayer.h"
#include "llvm/ExecutionEngine/Orc/IRTransformLayer.h"
#include "llvm/ExecutionEngine/Orc/LambdaResolver.h"
#include "llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h"
#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
#include "llvm/ExecutionEngine/RuntimeDyld.h"
#include "llvm/ExecutionEngine/SectionMemoryManager.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/IR/Mangler.h"
#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Transforms/Scalar/GVN.h"
#include <algorithm>
#include <map>
#include <memory>
#include <set>
#include <string>
#include <vector>
namespace llvm {
namespace orc {
class KaleidoscopeJIT {
private:
ExecutionSession ES;
std::map<VModuleKey, std::shared_ptr<SymbolResolver>> Resolvers;
std::unique_ptr<TargetMachine> TM;
const DataLayout DL;
RTDyldObjectLinkingLayer ObjectLayer;
IRCompileLayer<decltype(ObjectLayer), SimpleCompiler> CompileLayer;
using OptimizeFunction =
std::function<std::unique_ptr<Module>(std::unique_ptr<Module>)>;
IRTransformLayer<decltype(CompileLayer), OptimizeFunction> OptimizeLayer;
std::unique_ptr<JITCompileCallbackManager> CompileCallbackManager;
CompileOnDemandLayer<decltype(OptimizeLayer)> CODLayer;
public:
KaleidoscopeJIT()
: TM(EngineBuilder().selectTarget()), DL(TM->createDataLayout()),
ObjectLayer(ES,
[this](VModuleKey K) {
return RTDyldObjectLinkingLayer::Resources{
std::make_shared<SectionMemoryManager>(),
Resolvers[K]};
}),
CompileLayer(ObjectLayer, SimpleCompiler(*TM)),
OptimizeLayer(CompileLayer,
[this](std::unique_ptr<Module> M) {
return optimizeModule(std::move(M));
}),
CompileCallbackManager(
orc::createLocalCompileCallbackManager(TM->getTargetTriple(), 0)),
CODLayer(ES, OptimizeLayer,
[&](orc::VModuleKey K) { return Resolvers[K]; },
[&](orc::VModuleKey K, std::shared_ptr<SymbolResolver> R) {
Resolvers[K] = std::move(R);
},
[](Function &F) { return std::set<Function *>({&F}); },
*CompileCallbackManager,
orc::createLocalIndirectStubsManagerBuilder(
TM->getTargetTriple())) {
llvm::sys::DynamicLibrary::LoadLibraryPermanently(nullptr);
}
TargetMachine &getTargetMachine() { return *TM; }
VModuleKey addModule(std::unique_ptr<Module> M) {
// Create a new VModuleKey.
VModuleKey K = ES.allocateVModule();
// Build a resolver and associate it with the new key.
Resolvers[K] = createLegacyLookupResolver(
[this](const std::string &Name) -> JITSymbol {
if (auto Sym = CompileLayer.findSymbol(Name, false))
return Sym;
else if (auto Err = Sym.takeError())
return std::move(Err);
if (auto SymAddr =
RTDyldMemoryManager::getSymbolAddressInProcess(Name))
return JITSymbol(SymAddr, JITSymbolFlags::Exported);
return nullptr;
},
[](Error Err) { cantFail(std::move(Err), "lookupFlags failed"); });
// Add the module to the JIT with the new key.
cantFail(CODLayer.addModule(K, std::move(M)));
return K;
}
JITSymbol findSymbol(const std::string Name) {
std::string MangledName;
raw_string_ostream MangledNameStream(MangledName);
Mangler::getNameWithPrefix(MangledNameStream, Name, DL);
return CODLayer.findSymbol(MangledNameStream.str(), true);
}
void removeModule(VModuleKey K) {
cantFail(CODLayer.removeModule(K));
}
private:
std::unique_ptr<Module> optimizeModule(std::unique_ptr<Module> M) {
// Create a function pass manager.
auto FPM = llvm::make_unique<legacy::FunctionPassManager>(M.get());
// 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 M;
}
};
} // end namespace orc
} // end namespace llvm
#endif // LLVM_EXECUTIONENGINE_ORC_KALEIDOSCOPEJIT_H
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