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//===- CompileOnDemandLayer.h - Compile each function on demand -*- 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
//
//===----------------------------------------------------------------------===//
//
// JIT layer for breaking up modules and inserting callbacks to allow
// individual functions to be compiled on demand.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_EXECUTIONENGINE_ORC_COMPILEONDEMANDLAYER_H
#define LLVM_EXECUTIONENGINE_ORC_COMPILEONDEMANDLAYER_H
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ExecutionEngine/JITSymbol.h"
#include "llvm/ExecutionEngine/Orc/IndirectionUtils.h"
#include "llvm/ExecutionEngine/Orc/Layer.h"
#include "llvm/ExecutionEngine/Orc/LazyReexports.h"
#include "llvm/ExecutionEngine/Orc/Shared/OrcError.h"
#include "llvm/ExecutionEngine/Orc/Speculation.h"
#include "llvm/ExecutionEngine/RuntimeDyld.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/Constant.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalAlias.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/Mangler.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Type.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Transforms/Utils/ValueMapper.h"
#include <algorithm>
#include <cassert>
#include <functional>
#include <iterator>
#include <list>
#include <memory>
#include <optional>
#include <set>
#include <utility>
namespace llvm {
namespace orc {
class CompileOnDemandLayer : public IRLayer {
friend class PartitioningIRMaterializationUnit;
public:
/// Builder for IndirectStubsManagers.
using IndirectStubsManagerBuilder =
std::function<std::unique_ptr<IndirectStubsManager>()>;
using GlobalValueSet = std::set<const GlobalValue *>;
/// Partitioning function.
using PartitionFunction =
std::function<std::optional<GlobalValueSet>(GlobalValueSet Requested)>;
/// Off-the-shelf partitioning which compiles all requested symbols (usually
/// a single function at a time).
static std::optional<GlobalValueSet>
compileRequested(GlobalValueSet Requested);
/// Off-the-shelf partitioning which compiles whole modules whenever any
/// symbol in them is requested.
static std::optional<GlobalValueSet>
compileWholeModule(GlobalValueSet Requested);
/// Construct a CompileOnDemandLayer.
CompileOnDemandLayer(ExecutionSession &ES, IRLayer &BaseLayer,
LazyCallThroughManager &LCTMgr,
IndirectStubsManagerBuilder BuildIndirectStubsManager);
/// Sets the partition function.
void setPartitionFunction(PartitionFunction Partition);
/// Sets the ImplSymbolMap
void setImplMap(ImplSymbolMap *Imp);
/// Emits the given module. This should not be called by clients: it will be
/// called by the JIT when a definition added via the add method is requested.
void emit(std::unique_ptr<MaterializationResponsibility> R,
ThreadSafeModule TSM) override;
private:
struct PerDylibResources {
public:
PerDylibResources(JITDylib &ImplD,
std::unique_ptr<IndirectStubsManager> ISMgr)
: ImplD(ImplD), ISMgr(std::move(ISMgr)) {}
JITDylib &getImplDylib() { return ImplD; }
IndirectStubsManager &getISManager() { return *ISMgr; }
private:
JITDylib &ImplD;
std::unique_ptr<IndirectStubsManager> ISMgr;
};
using PerDylibResourcesMap = std::map<const JITDylib *, PerDylibResources>;
PerDylibResources &getPerDylibResources(JITDylib &TargetD);
void cleanUpModule(Module &M);
void expandPartition(GlobalValueSet &Partition);
void emitPartition(std::unique_ptr<MaterializationResponsibility> R,
ThreadSafeModule TSM,
IRMaterializationUnit::SymbolNameToDefinitionMap Defs);
mutable std::mutex CODLayerMutex;
IRLayer &BaseLayer;
LazyCallThroughManager &LCTMgr;
IndirectStubsManagerBuilder BuildIndirectStubsManager;
PerDylibResourcesMap DylibResources;
PartitionFunction Partition = compileRequested;
SymbolLinkagePromoter PromoteSymbols;
ImplSymbolMap *AliaseeImpls = nullptr;
};
} // end namespace orc
} // end namespace llvm
#endif // LLVM_EXECUTIONENGINE_ORC_COMPILEONDEMANDLAYER_H
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