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5ba0627233
VSO was a little close to VDSO (an acronym on Linux for Virtual Dynamic Shared Object) for comfort. It also risks giving the impression that instances of this class could be shared between ExecutionSessions, which they can not. JITDylib seems moderately less confusing, while still hinting at how this class is intended to be used, i.e. as a JIT-compiled stand-in for a dynamic library (code that would have been a dynamic library if you had wanted to compile it ahead of time). llvm-svn: 340084
135 lines
4.4 KiB
C++
135 lines
4.4 KiB
C++
//===--------- LLJIT.cpp - An ORC-based JIT for compiling LLVM IR ---------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ExecutionEngine/Orc/LLJIT.h"
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#include "llvm/ExecutionEngine/Orc/OrcError.h"
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#include "llvm/ExecutionEngine/SectionMemoryManager.h"
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#include "llvm/IR/Mangler.h"
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namespace llvm {
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namespace orc {
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Expected<std::unique_ptr<LLJIT>>
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LLJIT::Create(std::unique_ptr<ExecutionSession> ES,
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std::unique_ptr<TargetMachine> TM, DataLayout DL) {
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return std::unique_ptr<LLJIT>(
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new LLJIT(std::move(ES), std::move(TM), std::move(DL)));
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}
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Error LLJIT::defineAbsolute(StringRef Name, JITEvaluatedSymbol Sym) {
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auto InternedName = ES->getSymbolStringPool().intern(Name);
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SymbolMap Symbols({{InternedName, Sym}});
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return Main.define(absoluteSymbols(std::move(Symbols)));
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}
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Error LLJIT::addIRModule(JITDylib &JD, std::unique_ptr<Module> M) {
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assert(M && "Can not add null module");
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if (auto Err = applyDataLayout(*M))
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return Err;
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auto K = ES->allocateVModule();
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return CompileLayer.add(JD, K, std::move(M));
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}
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Expected<JITEvaluatedSymbol> LLJIT::lookupLinkerMangled(JITDylib &JD,
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StringRef Name) {
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return llvm::orc::lookup({&JD}, ES->getSymbolStringPool().intern(Name));
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}
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LLJIT::LLJIT(std::unique_ptr<ExecutionSession> ES,
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std::unique_ptr<TargetMachine> TM, DataLayout DL)
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: ES(std::move(ES)), Main(this->ES->createJITDylib("main")),
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TM(std::move(TM)), DL(std::move(DL)),
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ObjLinkingLayer(*this->ES,
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[this](VModuleKey K) { return getMemoryManager(K); }),
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CompileLayer(*this->ES, ObjLinkingLayer, SimpleCompiler(*this->TM)),
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CtorRunner(Main), DtorRunner(Main) {}
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std::shared_ptr<RuntimeDyld::MemoryManager>
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LLJIT::getMemoryManager(VModuleKey K) {
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return llvm::make_unique<SectionMemoryManager>();
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}
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std::string LLJIT::mangle(StringRef UnmangledName) {
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std::string MangledName;
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{
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raw_string_ostream MangledNameStream(MangledName);
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Mangler::getNameWithPrefix(MangledNameStream, UnmangledName, DL);
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}
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return MangledName;
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}
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Error LLJIT::applyDataLayout(Module &M) {
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if (M.getDataLayout().isDefault())
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M.setDataLayout(DL);
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if (M.getDataLayout() != DL)
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return make_error<StringError>(
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"Added modules have incompatible data layouts",
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inconvertibleErrorCode());
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return Error::success();
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}
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void LLJIT::recordCtorDtors(Module &M) {
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CtorRunner.add(getConstructors(M));
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DtorRunner.add(getDestructors(M));
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}
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Expected<std::unique_ptr<LLLazyJIT>>
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LLLazyJIT::Create(std::unique_ptr<ExecutionSession> ES,
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std::unique_ptr<TargetMachine> TM, DataLayout DL,
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LLVMContext &Ctx) {
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const Triple &TT = TM->getTargetTriple();
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auto CCMgr = createLocalCompileCallbackManager(TT, *ES, 0);
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if (!CCMgr)
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return make_error<StringError>(
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std::string("No callback manager available for ") + TT.str(),
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inconvertibleErrorCode());
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auto ISMBuilder = createLocalIndirectStubsManagerBuilder(TT);
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if (!ISMBuilder)
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return make_error<StringError>(
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std::string("No indirect stubs manager builder for ") + TT.str(),
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inconvertibleErrorCode());
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return std::unique_ptr<LLLazyJIT>(
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new LLLazyJIT(std::move(ES), std::move(TM), std::move(DL), Ctx,
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std::move(CCMgr), std::move(ISMBuilder)));
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}
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Error LLLazyJIT::addLazyIRModule(JITDylib &JD, std::unique_ptr<Module> M) {
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assert(M && "Can not add null module");
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if (auto Err = applyDataLayout(*M))
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return Err;
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makeAllSymbolsExternallyAccessible(*M);
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recordCtorDtors(*M);
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auto K = ES->allocateVModule();
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return CODLayer.add(JD, K, std::move(M));
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}
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LLLazyJIT::LLLazyJIT(
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std::unique_ptr<ExecutionSession> ES, std::unique_ptr<TargetMachine> TM,
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DataLayout DL, LLVMContext &Ctx,
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std::unique_ptr<JITCompileCallbackManager> CCMgr,
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std::function<std::unique_ptr<IndirectStubsManager>()> ISMBuilder)
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: LLJIT(std::move(ES), std::move(TM), std::move(DL)),
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CCMgr(std::move(CCMgr)), TransformLayer(*this->ES, CompileLayer),
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CODLayer(*this->ES, TransformLayer, *this->CCMgr, std::move(ISMBuilder),
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[&]() -> LLVMContext & { return Ctx; }) {}
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} // End namespace orc.
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} // End namespace llvm.
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