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//===--------- LLJIT.cpp - An ORC-based JIT for compiling LLVM IR ---------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/ExecutionEngine/Orc/LLJIT.h"
#include "llvm/ExecutionEngine/Orc/OrcError.h"
#include "llvm/ExecutionEngine/SectionMemoryManager.h"
#include "llvm/IR/Mangler.h"
namespace llvm {
namespace orc {
Expected<std::unique_ptr<LLJIT>>
LLJIT::Create(std::unique_ptr<ExecutionSession> ES,
std::unique_ptr<TargetMachine> TM, DataLayout DL) {
return std::unique_ptr<LLJIT>(
new LLJIT(std::move(ES), std::move(TM), std::move(DL)));
}
Error LLJIT::defineAbsolute(StringRef Name, JITEvaluatedSymbol Sym) {
auto InternedName = ES->getSymbolStringPool().intern(Name);
SymbolMap Symbols({{InternedName, Sym}});
return Main.define(absoluteSymbols(std::move(Symbols)));
}
Error LLJIT::addIRModule(VSO &V, std::unique_ptr<Module> M) {
assert(M && "Can not add null module");
if (auto Err = applyDataLayout(*M))
return Err;
auto K = ES->allocateVModule();
Resolvers[K] = createResolverFor(V);
return CompileLayer.add(V, K, std::move(M));
}
Expected<JITEvaluatedSymbol> LLJIT::lookupLinkerMangled(VSO &V,
StringRef Name) {
return llvm::orc::lookup({&V}, ES->getSymbolStringPool().intern(Name));
}
LLJIT::LLJIT(std::unique_ptr<ExecutionSession> ES,
std::unique_ptr<TargetMachine> TM, DataLayout DL)
: ES(std::move(ES)), Main(this->ES->createVSO("main")), TM(std::move(TM)),
DL(std::move(DL)),
ObjLinkingLayer(*this->ES,
[this](VModuleKey K) { return getRTDyldResources(K); }),
CompileLayer(*this->ES, ObjLinkingLayer, SimpleCompiler(*this->TM)),
CtorRunner(Main), DtorRunner(Main) {
VSOLookupOrder[&Main] = VSOList({&Main});
}
std::shared_ptr<SymbolResolver> LLJIT::takeSymbolResolver(VModuleKey K) {
auto ResolverI = Resolvers.find(K);
assert(ResolverI != Resolvers.end() && "Missing resolver");
auto Resolver = std::move(ResolverI->second);
Resolvers.erase(ResolverI);
return Resolver;
}
RTDyldObjectLinkingLayer2::Resources LLJIT::getRTDyldResources(VModuleKey K) {
return orc::RTDyldObjectLinkingLayer2::Resources(
{llvm::make_unique<SectionMemoryManager>(), takeSymbolResolver(K)});
}
std::string LLJIT::mangle(StringRef UnmangledName) {
std::string MangledName;
{
raw_string_ostream MangledNameStream(MangledName);
Mangler::getNameWithPrefix(MangledNameStream, UnmangledName, DL);
}
return MangledName;
}
std::unique_ptr<SymbolResolver> LLJIT::createResolverFor(VSO &V) {
return createSymbolResolver(
[&](SymbolFlagsMap &Flags, const SymbolNameSet &Symbols) {
return V.lookupFlags(Flags, Symbols);
},
[&, this](std::shared_ptr<AsynchronousSymbolQuery> Q,
SymbolNameSet Symbols) {
assert(VSOLookupOrder.count(&V) && "No VSO lookup order for V");
SymbolNameSet Unresolved = std::move(Symbols);
for (auto *LV : VSOLookupOrder[&V])
Unresolved = LV->lookup(Q, std::move(Unresolved));
return Unresolved;
});
}
Error LLJIT::applyDataLayout(Module &M) {
if (M.getDataLayout().isDefault())
M.setDataLayout(DL);
if (M.getDataLayout() != DL)
return make_error<StringError>(
"Added modules have incompatible data layouts",
inconvertibleErrorCode());
return Error::success();
}
void LLJIT::recordCtorDtors(Module &M) {
CtorRunner.add(getConstructors(M));
DtorRunner.add(getDestructors(M));
}
Expected<std::unique_ptr<LLLazyJIT>>
LLLazyJIT::Create(std::unique_ptr<ExecutionSession> ES,
std::unique_ptr<TargetMachine> TM, DataLayout DL,
LLVMContext &Ctx) {
const Triple &TT = TM->getTargetTriple();
auto CCMgr = createLocalCompileCallbackManager(TT, *ES, 0);
if (!CCMgr)
return make_error<StringError>(
std::string("No callback manager available for ") + TT.str(),
inconvertibleErrorCode());
auto ISMBuilder = createLocalIndirectStubsManagerBuilder(TT);
if (!ISMBuilder)
return make_error<StringError>(
std::string("No indirect stubs manager builder for ") + TT.str(),
inconvertibleErrorCode());
return std::unique_ptr<LLLazyJIT>(
new LLLazyJIT(std::move(ES), std::move(TM), std::move(DL), Ctx,
std::move(CCMgr), std::move(ISMBuilder)));
}
Error LLLazyJIT::addLazyIRModule(VSO &V, std::unique_ptr<Module> M) {
assert(M && "Can not add null module");
if (auto Err = applyDataLayout(*M))
return Err;
makeAllSymbolsExternallyAccessible(*M);
recordCtorDtors(*M);
auto K = ES->allocateVModule();
setSymbolResolver(K, createResolverFor(V));
return CODLayer.add(V, K, std::move(M));
}
LLLazyJIT::LLLazyJIT(
std::unique_ptr<ExecutionSession> ES, std::unique_ptr<TargetMachine> TM,
DataLayout DL, LLVMContext &Ctx,
std::unique_ptr<JITCompileCallbackManager> CCMgr,
std::function<std::unique_ptr<IndirectStubsManager>()> ISMBuilder)
: LLJIT(std::move(ES), std::move(TM), std::move(DL)),
CCMgr(std::move(CCMgr)), TransformLayer(*this->ES, CompileLayer),
CODLayer(*this->ES, TransformLayer, *this->CCMgr, std::move(ISMBuilder),
[this](VModuleKey K) { return takeSymbolResolver(K); },
[this](VModuleKey K, std::shared_ptr<SymbolResolver> R) {
setSymbolResolver(K, std::move(R));
},
[&]() -> LLVMContext & { return Ctx; }) {}
void LLLazyJIT::setSymbolResolver(VModuleKey K,
std::shared_ptr<SymbolResolver> R) {
assert(!Resolvers.count(K) && "Resolver already present for VModule K");
Resolvers[K] = std::move(R);
}
} // End namespace orc.
} // End namespace llvm.
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