1 files changed, 0 insertions, 302 deletions
diff --git a/contrib/llvm/lib/ExecutionEngine/Orc/CompileOnDemandLayer.cpp b/contrib/llvm/lib/ExecutionEngine/Orc/CompileOnDemandLayer.cpp
deleted file mode 100644
index 99bf53bc3afa..000000000000
--- a/contrib/llvm/lib/ExecutionEngine/Orc/CompileOnDemandLayer.cpp
+++ /dev/null
@@ -1,302 +0,0 @@
-//===----- CompileOnDemandLayer.cpp - Lazily emit IR on first call --------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/ExecutionEngine/Orc/CompileOnDemandLayer.h"
-#include "llvm/IR/Mangler.h"
-#include "llvm/IR/Module.h"
-
-using namespace llvm;
-using namespace llvm::orc;
-
-static ThreadSafeModule extractSubModule(ThreadSafeModule &TSM,
-                                         StringRef Suffix,
-                                         GVPredicate ShouldExtract) {
-
-  auto DeleteExtractedDefs = [](GlobalValue &GV) {
-    // Bump the linkage: this global will be provided by the external module.
-    GV.setLinkage(GlobalValue::ExternalLinkage);
-
-    // Delete the definition in the source module.
-    if (isa<Function>(GV)) {
-      auto &F = cast<Function>(GV);
-      F.deleteBody();
-      F.setPersonalityFn(nullptr);
-    } else if (isa<GlobalVariable>(GV)) {
-      cast<GlobalVariable>(GV).setInitializer(nullptr);
-    } else if (isa<GlobalAlias>(GV)) {
-      // We need to turn deleted aliases into function or variable decls based
-      // on the type of their aliasee.
-      auto &A = cast<GlobalAlias>(GV);
-      Constant *Aliasee = A.getAliasee();
-      assert(A.hasName() && "Anonymous alias?");
-      assert(Aliasee->hasName() && "Anonymous aliasee");
-      std::string AliasName = A.getName();
-
-      if (isa<Function>(Aliasee)) {
-        auto *F = cloneFunctionDecl(*A.getParent(), *cast<Function>(Aliasee));
-        A.replaceAllUsesWith(F);
-        A.eraseFromParent();
-        F->setName(AliasName);
-      } else if (isa<GlobalVariable>(Aliasee)) {
-        auto *G = cloneGlobalVariableDecl(*A.getParent(),
-                                          *cast<GlobalVariable>(Aliasee));
-        A.replaceAllUsesWith(G);
-        A.eraseFromParent();
-        G->setName(AliasName);
-      } else
-        llvm_unreachable("Alias to unsupported type");
-    } else
-      llvm_unreachable("Unsupported global type");
-  };
-
-  auto NewTSMod = cloneToNewContext(TSM, ShouldExtract, DeleteExtractedDefs);
-  auto &M = *NewTSMod.getModule();
-  M.setModuleIdentifier((M.getModuleIdentifier() + Suffix).str());
-
-  return NewTSMod;
-}
-
-namespace llvm {
-namespace orc {
-
-class PartitioningIRMaterializationUnit : public IRMaterializationUnit {
-public:
-  PartitioningIRMaterializationUnit(ExecutionSession &ES, ThreadSafeModule TSM,
-                                    VModuleKey K, CompileOnDemandLayer &Parent)
-      : IRMaterializationUnit(ES, std::move(TSM), std::move(K)),
-        Parent(Parent) {}
-
-  PartitioningIRMaterializationUnit(
-      ThreadSafeModule TSM, SymbolFlagsMap SymbolFlags,
-      SymbolNameToDefinitionMap SymbolToDefinition,
-      CompileOnDemandLayer &Parent)
-      : IRMaterializationUnit(std::move(TSM), std::move(K),
-                              std::move(SymbolFlags),
-                              std::move(SymbolToDefinition)),
-        Parent(Parent) {}
-
-private:
-  void materialize(MaterializationResponsibility R) override {
-    Parent.emitPartition(std::move(R), std::move(TSM),
-                         std::move(SymbolToDefinition));
-  }
-
-  void discard(const JITDylib &V, const SymbolStringPtr &Name) override {
-    // All original symbols were materialized by the CODLayer and should be
-    // final. The function bodies provided by M should never be overridden.
-    llvm_unreachable("Discard should never be called on an "
-                     "ExtractingIRMaterializationUnit");
-  }
-
-  mutable std::mutex SourceModuleMutex;
-  CompileOnDemandLayer &Parent;
-};
-
-Optional<CompileOnDemandLayer::GlobalValueSet>
-CompileOnDemandLayer::compileRequested(GlobalValueSet Requested) {
-  return std::move(Requested);
-}
-
-Optional<CompileOnDemandLayer::GlobalValueSet>
-CompileOnDemandLayer::compileWholeModule(GlobalValueSet Requested) {
-  return None;
-}
-
-CompileOnDemandLayer::CompileOnDemandLayer(
-    ExecutionSession &ES, IRLayer &BaseLayer, LazyCallThroughManager &LCTMgr,
-    IndirectStubsManagerBuilder BuildIndirectStubsManager)
-    : IRLayer(ES), BaseLayer(BaseLayer), LCTMgr(LCTMgr),
-      BuildIndirectStubsManager(std::move(BuildIndirectStubsManager)) {}
-
-void CompileOnDemandLayer::setPartitionFunction(PartitionFunction Partition) {
-  this->Partition = std::move(Partition);
-}
-
-void CompileOnDemandLayer::emit(MaterializationResponsibility R,
-                                ThreadSafeModule TSM) {
-  assert(TSM.getModule() && "Null module");
-
-  auto &ES = getExecutionSession();
-  auto &M = *TSM.getModule();
-
-  // First, do some cleanup on the module:
-  cleanUpModule(M);
-
-  // Now sort the callables and non-callables, build re-exports and lodge the
-  // actual module with the implementation dylib.
-  auto &PDR = getPerDylibResources(R.getTargetJITDylib());
-
-  MangleAndInterner Mangle(ES, M.getDataLayout());
-  SymbolAliasMap NonCallables;
-  SymbolAliasMap Callables;
-  for (auto &GV : M.global_values()) {
-    if (GV.isDeclaration() || GV.hasLocalLinkage() || GV.hasAppendingLinkage())
-      continue;
-
-    auto Name = Mangle(GV.getName());
-    auto Flags = JITSymbolFlags::fromGlobalValue(GV);
-    if (Flags.isCallable())
-      Callables[Name] = SymbolAliasMapEntry(Name, Flags);
-    else
-      NonCallables[Name] = SymbolAliasMapEntry(Name, Flags);
-  }
-
-  // Create a partitioning materialization unit and lodge it with the
-  // implementation dylib.
-  if (auto Err = PDR.getImplDylib().define(
-          llvm::make_unique<PartitioningIRMaterializationUnit>(
-              ES, std::move(TSM), R.getVModuleKey(), *this))) {
-    ES.reportError(std::move(Err));
-    R.failMaterialization();
-    return;
-  }
-
-  R.replace(reexports(PDR.getImplDylib(), std::move(NonCallables), true));
-  R.replace(lazyReexports(LCTMgr, PDR.getISManager(), PDR.getImplDylib(),
-                          std::move(Callables)));
-}
-
-CompileOnDemandLayer::PerDylibResources &
-CompileOnDemandLayer::getPerDylibResources(JITDylib &TargetD) {
-  auto I = DylibResources.find(&TargetD);
-  if (I == DylibResources.end()) {
-    auto &ImplD = getExecutionSession().createJITDylib(
-        TargetD.getName() + ".impl", false);
-    TargetD.withSearchOrderDo([&](const JITDylibSearchList &TargetSearchOrder) {
-      auto NewSearchOrder = TargetSearchOrder;
-      assert(!NewSearchOrder.empty() &&
-             NewSearchOrder.front().first == &TargetD &&
-             NewSearchOrder.front().second == true &&
-             "TargetD must be at the front of its own search order and match "
-             "non-exported symbol");
-      NewSearchOrder.insert(std::next(NewSearchOrder.begin()), {&ImplD, true});
-      ImplD.setSearchOrder(std::move(NewSearchOrder), false);
-    });
-    PerDylibResources PDR(ImplD, BuildIndirectStubsManager());
-    I = DylibResources.insert(std::make_pair(&TargetD, std::move(PDR))).first;
-  }
-
-  return I->second;
-}
-
-void CompileOnDemandLayer::cleanUpModule(Module &M) {
-  for (auto &F : M.functions()) {
-    if (F.isDeclaration())
-      continue;
-
-    if (F.hasAvailableExternallyLinkage()) {
-      F.deleteBody();
-      F.setPersonalityFn(nullptr);
-      continue;
-    }
-  }
-}
-
-void CompileOnDemandLayer::expandPartition(GlobalValueSet &Partition) {
-  // Expands the partition to ensure the following rules hold:
-  // (1) If any alias is in the partition, its aliasee is also in the partition.
-  // (2) If any aliasee is in the partition, its aliases are also in the
-  //     partiton.
-  // (3) If any global variable is in the partition then all global variables
-  //     are in the partition.
-  assert(!Partition.empty() && "Unexpected empty partition");
-
-  const Module &M = *(*Partition.begin())->getParent();
-  bool ContainsGlobalVariables = false;
-  std::vector<const GlobalValue *> GVsToAdd;
-
-  for (auto *GV : Partition)
-    if (isa<GlobalAlias>(GV))
-      GVsToAdd.push_back(
-          cast<GlobalValue>(cast<GlobalAlias>(GV)->getAliasee()));
-    else if (isa<GlobalVariable>(GV))
-      ContainsGlobalVariables = true;
-
-  for (auto &A : M.aliases())
-    if (Partition.count(cast<GlobalValue>(A.getAliasee())))
-      GVsToAdd.push_back(&A);
-
-  if (ContainsGlobalVariables)
-    for (auto &G : M.globals())
-      GVsToAdd.push_back(&G);
-
-  for (auto *GV : GVsToAdd)
-    Partition.insert(GV);
-}
-
-void CompileOnDemandLayer::emitPartition(
-    MaterializationResponsibility R, ThreadSafeModule TSM,
-    IRMaterializationUnit::SymbolNameToDefinitionMap Defs) {
-
-  // FIXME: Need a 'notify lazy-extracting/emitting' callback to tie the
-  //        extracted module key, extracted module, and source module key
-  //        together. This could be used, for example, to provide a specific
-  //        memory manager instance to the linking layer.
-
-  auto &ES = getExecutionSession();
-
-  GlobalValueSet RequestedGVs;
-  for (auto &Name : R.getRequestedSymbols()) {
-    assert(Defs.count(Name) && "No definition for symbol");
-    RequestedGVs.insert(Defs[Name]);
-  }
-
-  auto GVsToExtract = Partition(RequestedGVs);
-
-  // Take a 'None' partition to mean the whole module (as opposed to an empty
-  // partition, which means "materialize nothing"). Emit the whole module
-  // unmodified to the base layer.
-  if (GVsToExtract == None) {
-    Defs.clear();
-    BaseLayer.emit(std::move(R), std::move(TSM));
-    return;
-  }
-
-  // If the partition is empty, return the whole module to the symbol table.
-  if (GVsToExtract->empty()) {
-    R.replace(llvm::make_unique<PartitioningIRMaterializationUnit>(
-        std::move(TSM), R.getSymbols(), std::move(Defs), *this));
-    return;
-  }
-
-  // Ok -- we actually need to partition the symbols. Promote the symbol
-  // linkages/names.
-  // FIXME: We apply this once per partitioning. It's safe, but overkill.
-  {
-    auto PromotedGlobals = PromoteSymbols(*TSM.getModule());
-    if (!PromotedGlobals.empty()) {
-      MangleAndInterner Mangle(ES, TSM.getModule()->getDataLayout());
-      SymbolFlagsMap SymbolFlags;
-      for (auto &GV : PromotedGlobals)
-        SymbolFlags[Mangle(GV->getName())] =
-            JITSymbolFlags::fromGlobalValue(*GV);
-      if (auto Err = R.defineMaterializing(SymbolFlags)) {
-        ES.reportError(std::move(Err));
-        R.failMaterialization();
-        return;
-      }
-    }
-  }
-
-  expandPartition(*GVsToExtract);
-
-  // Extract the requested partiton (plus any necessary aliases) and
-  // put the rest back into the impl dylib.
-  auto ShouldExtract = [&](const GlobalValue &GV) -> bool {
-    return GVsToExtract->count(&GV);
-  };
-
-  auto ExtractedTSM = extractSubModule(TSM, ".submodule", ShouldExtract);
-  R.replace(llvm::make_unique<PartitioningIRMaterializationUnit>(
-      ES, std::move(TSM), R.getVModuleKey(), *this));
-
-  BaseLayer.emit(std::move(R), std::move(ExtractedTSM));
-}
-
-} // end namespace orc
-} // end namespace llvm