1 //===------ IRCompileLayer.h -- Eagerly compile IR for JIT ------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Contains the definition for a basic, eagerly compiling layer of the JIT.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_EXECUTIONENGINE_ORC_IRCOMPILELAYER_H
15 #define LLVM_EXECUTIONENGINE_ORC_IRCOMPILELAYER_H
17 #include "JITSymbol.h"
18 #include "llvm/ExecutionEngine/ObjectCache.h"
19 #include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
20 #include "llvm/Object/ObjectFile.h"
26 /// @brief Eager IR compiling layer.
28 /// This layer accepts sets of LLVM IR Modules (via addModuleSet). It
29 /// immediately compiles each IR module to an object file (each IR Module is
30 /// compiled separately). The resulting set of object files is then added to
31 /// the layer below, which must implement the object layer concept.
32 template <typename BaseLayerT> class IRCompileLayer {
34 typedef std::function<object::OwningBinary<object::ObjectFile>(Module &)>
38 typedef typename BaseLayerT::ObjSetHandleT ObjSetHandleT;
41 /// @brief Handle to a set of compiled modules.
42 typedef ObjSetHandleT ModuleSetHandleT;
44 /// @brief Construct an IRCompileLayer with the given BaseLayer, which must
45 /// implement the ObjectLayer concept.
46 IRCompileLayer(BaseLayerT &BaseLayer, CompileFtor Compile)
47 : BaseLayer(BaseLayer), Compile(std::move(Compile)), ObjCache(nullptr) {}
49 /// @brief Set an ObjectCache to query before compiling.
50 void setObjectCache(ObjectCache *NewCache) { ObjCache = NewCache; }
52 /// @brief Compile each module in the given module set, then add the resulting
53 /// set of objects to the base layer along with the memory manager and
56 /// @return A handle for the added modules.
57 template <typename ModuleSetT, typename MemoryManagerPtrT,
58 typename SymbolResolverPtrT>
59 ModuleSetHandleT addModuleSet(ModuleSetT Ms,
60 MemoryManagerPtrT MemMgr,
61 SymbolResolverPtrT Resolver) {
62 std::vector<std::unique_ptr<object::OwningBinary<object::ObjectFile>>>
65 for (const auto &M : Ms) {
67 llvm::make_unique<object::OwningBinary<object::ObjectFile>>();
70 *Object = tryToLoadFromObjectCache(*M);
72 if (!Object->getBinary()) {
73 *Object = Compile(*M);
75 ObjCache->notifyObjectCompiled(&*M,
76 Object->getBinary()->getMemoryBufferRef());
79 Objects.push_back(std::move(Object));
83 BaseLayer.addObjectSet(std::move(Objects), std::move(MemMgr),
89 /// @brief Remove the module set associated with the handle H.
90 void removeModuleSet(ModuleSetHandleT H) { BaseLayer.removeObjectSet(H); }
92 /// @brief Search for the given named symbol.
93 /// @param Name The name of the symbol to search for.
94 /// @param ExportedSymbolsOnly If true, search only for exported symbols.
95 /// @return A handle for the given named symbol, if it exists.
96 JITSymbol findSymbol(const std::string &Name, bool ExportedSymbolsOnly) {
97 return BaseLayer.findSymbol(Name, ExportedSymbolsOnly);
100 /// @brief Get the address of the given symbol in the context of the set of
101 /// compiled modules represented by the handle H. This call is
102 /// forwarded to the base layer's implementation.
103 /// @param H The handle for the module set to search in.
104 /// @param Name The name of the symbol to search for.
105 /// @param ExportedSymbolsOnly If true, search only for exported symbols.
106 /// @return A handle for the given named symbol, if it is found in the
107 /// given module set.
108 JITSymbol findSymbolIn(ModuleSetHandleT H, const std::string &Name,
109 bool ExportedSymbolsOnly) {
110 return BaseLayer.findSymbolIn(H, Name, ExportedSymbolsOnly);
113 /// @brief Immediately emit and finalize the moduleOB set represented by the
115 /// @param H Handle for module set to emit/finalize.
116 void emitAndFinalize(ModuleSetHandleT H) {
117 BaseLayer.emitAndFinalize(H);
121 object::OwningBinary<object::ObjectFile>
122 tryToLoadFromObjectCache(const Module &M) {
123 std::unique_ptr<MemoryBuffer> ObjBuffer = ObjCache->getObject(&M);
125 return object::OwningBinary<object::ObjectFile>();
127 Expected<std::unique_ptr<object::ObjectFile>> Obj =
128 object::ObjectFile::createObjectFile(ObjBuffer->getMemBufferRef());
130 // TODO: Actually report errors helpfully.
131 consumeError(Obj.takeError());
132 return object::OwningBinary<object::ObjectFile>();
135 return object::OwningBinary<object::ObjectFile>(std::move(*Obj),
136 std::move(ObjBuffer));
139 BaseLayerT &BaseLayer;
141 ObjectCache *ObjCache;
144 } // End namespace orc.
145 } // End namespace llvm.
147 #endif // LLVM_EXECUTIONENGINE_ORC_IRCOMPILINGLAYER_H