Reinstate "Nuke the old JIT."

Approved by Jim Grosbach, Lang Hames, Rafael Espindola.

This reinstates commits r215111, 215115, 215116, 215117, 215136.

llvm-svn: 216982

17 files changed, 12 insertions, 2293 deletions

diff --git a/llvm/lib/ExecutionEngine/CMakeLists.txt b/llvm/lib/ExecutionEngine/CMakeLists.txt
index 3102c7bd582..208495c8847 100644
--- a/llvm/lib/ExecutionEngine/CMakeLists.txt
+++ b/llvm/lib/ExecutionEngine/CMakeLists.txt
@@ -8,7 +8,6 @@ add_llvm_library(LLVMExecutionEngine
   )
 
 add_subdirectory(Interpreter)
-add_subdirectory(JIT)
 add_subdirectory(MCJIT)
 add_subdirectory(RuntimeDyld)
 
diff --git a/llvm/lib/ExecutionEngine/ExecutionEngine.cpp b/llvm/lib/ExecutionEngine/ExecutionEngine.cpp
index a73d8ca8a2b..315dee4944c 100644
--- a/llvm/lib/ExecutionEngine/ExecutionEngine.cpp
+++ b/llvm/lib/ExecutionEngine/ExecutionEngine.cpp
@@ -48,12 +48,6 @@ void ObjectCache::anchor() {}
 void ObjectBuffer::anchor() {}
 void ObjectBufferStream::anchor() {}
 
-ExecutionEngine *(*ExecutionEngine::JITCtor)(
-  std::unique_ptr<Module> M,
-  std::string *ErrorStr,
-  JITMemoryManager *JMM,
-  bool GVsWithCode,
-  TargetMachine *TM) = nullptr;
 ExecutionEngine *(*ExecutionEngine::MCJITCtor)(
   std::unique_ptr<Module >M,
   std::string *ErrorStr,
@@ -411,10 +405,8 @@ void EngineBuilder::InitEngine() {
   MCJMM = nullptr;
   JMM = nullptr;
   Options = TargetOptions();
-  AllocateGVsWithCode = false;
   RelocModel = Reloc::Default;
   CMModel = CodeModel::JITDefault;
-  UseMCJIT = false;
 
 // IR module verification is enabled by default in debug builds, and disabled
 // by default in release builds.
@@ -447,14 +439,6 @@ ExecutionEngine *EngineBuilder::create(TargetMachine *TM) {
       return nullptr;
     }
   }
-  
-  if (MCJMM && ! UseMCJIT) {
-    if (ErrorStr)
-      *ErrorStr =
-        "Cannot create a legacy JIT with a runtime dyld memory "
-        "manager.";
-    return nullptr;
-  }
 
   // Unless the interpreter was explicitly selected or the JIT is not linked,
   // try making a JIT.
@@ -467,13 +451,9 @@ ExecutionEngine *EngineBuilder::create(TargetMachine *TM) {
     }
 
     ExecutionEngine *EE = nullptr;
-    if (UseMCJIT && ExecutionEngine::MCJITCtor)
+    if (ExecutionEngine::MCJITCtor)
       EE = ExecutionEngine::MCJITCtor(std::move(M), ErrorStr,
                                       MCJMM ? MCJMM : JMM, TheTM.release());
-    else if (ExecutionEngine::JITCtor)
-      EE = ExecutionEngine::JITCtor(std::move(M), ErrorStr, JMM,
-                                    AllocateGVsWithCode, TheTM.release());
-
     if (EE) {
       EE->setVerifyModules(VerifyModules);
       return EE;
@@ -490,8 +470,7 @@ ExecutionEngine *EngineBuilder::create(TargetMachine *TM) {
     return nullptr;
   }
 
-  if ((WhichEngine & EngineKind::JIT) && !ExecutionEngine::JITCtor &&
-      !ExecutionEngine::MCJITCtor) {
+  if ((WhichEngine & EngineKind::JIT) && !ExecutionEngine::MCJITCtor) {
     if (ErrorStr)
       *ErrorStr = "JIT has not been linked in.";
   }
@@ -837,9 +816,6 @@ GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
       Result = PTOGV(getPointerToFunctionOrStub(const_cast<Function*>(F)));
     else if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(C))
       Result = PTOGV(getOrEmitGlobalVariable(const_cast<GlobalVariable*>(GV)));
-    else if (const BlockAddress *BA = dyn_cast<BlockAddress>(C))
-      Result = PTOGV(getPointerToBasicBlock(const_cast<BasicBlock*>(
-                                                        BA->getBasicBlock())));
     else
       llvm_unreachable("Unknown constant pointer type!");
     break;
diff --git a/llvm/lib/ExecutionEngine/ExecutionEngineBindings.cpp b/llvm/lib/ExecutionEngine/ExecutionEngineBindings.cpp
index 3771a8f2f59..58271df85a3 100644
--- a/llvm/lib/ExecutionEngine/ExecutionEngineBindings.cpp
+++ b/llvm/lib/ExecutionEngine/ExecutionEngineBindings.cpp
@@ -184,7 +184,6 @@ LLVMBool LLVMCreateMCJITCompilerForModule(
   EngineBuilder builder(std::unique_ptr<Module>(unwrap(M)));
   builder.setEngineKind(EngineKind::JIT)
          .setErrorStr(&Error)
-         .setUseMCJIT(true)
          .setOptLevel((CodeGenOpt::Level)options.OptLevel)
          .setCodeModel(unwrap(options.CodeModel))
          .setTargetOptions(targetOptions);
@@ -267,7 +266,6 @@ LLVMGenericValueRef LLVMRunFunction(LLVMExecutionEngineRef EE, LLVMValueRef F,
 }
 
 void LLVMFreeMachineCodeForFunction(LLVMExecutionEngineRef EE, LLVMValueRef F) {
-  unwrap(EE)->freeMachineCodeForFunction(unwrap<Function>(F));
 }
 
 void LLVMAddModule(LLVMExecutionEngineRef EE, LLVMModuleRef M){
@@ -306,7 +304,7 @@ LLVMBool LLVMFindFunction(LLVMExecutionEngineRef EE, const char *Name,
 
 void *LLVMRecompileAndRelinkFunction(LLVMExecutionEngineRef EE,
                                      LLVMValueRef Fn) {
-  return unwrap(EE)->recompileAndRelinkFunction(unwrap<Function>(Fn));
+  return nullptr;
 }
 
 LLVMTargetDataRef LLVMGetExecutionEngineTargetData(LLVMExecutionEngineRef EE) {
diff --git a/llvm/lib/ExecutionEngine/Interpreter/Interpreter.h b/llvm/lib/ExecutionEngine/Interpreter/Interpreter.h
index 4a5fbb96dfd..70b07d5bece 100644
--- a/llvm/lib/ExecutionEngine/Interpreter/Interpreter.h
+++ b/llvm/lib/ExecutionEngine/Interpreter/Interpreter.h
@@ -122,17 +122,6 @@ public:
     return nullptr;
   }
 
-  /// recompileAndRelinkFunction - For the interpreter, functions are always
-  /// up-to-date.
-  ///
-  void *recompileAndRelinkFunction(Function *F) override {
-    return getPointerToFunction(F);
-  }
-
-  /// freeMachineCodeForFunction - The interpreter does not generate any code.
-  ///
-  void freeMachineCodeForFunction(Function *F) override { }
-
   // Methods used to execute code:
   // Place a call on the stack
   void callFunction(Function *F, const std::vector<GenericValue> &ArgVals);
@@ -214,7 +203,6 @@ private:  // Helper functions
   void SwitchToNewBasicBlock(BasicBlock *Dest, ExecutionContext &SF);
 
   void *getPointerToFunction(Function *F) override { return (void*)F; }
-  void *getPointerToBasicBlock(BasicBlock *BB) override { return (void*)BB; }
 
   void initializeExecutionEngine() { }
   void initializeExternalFunctions();
diff --git a/llvm/lib/ExecutionEngine/JIT/CMakeLists.txt b/llvm/lib/ExecutionEngine/JIT/CMakeLists.txt
deleted file mode 100644
index e16baede50f..00000000000
--- a/llvm/lib/ExecutionEngine/JIT/CMakeLists.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-# TODO: Support other architectures. See Makefile.
-add_definitions(-DENABLE_X86_JIT)
-
-add_llvm_library(LLVMJIT
-  JIT.cpp
-  JITEmitter.cpp
-  JITMemoryManager.cpp
-  )
diff --git a/llvm/lib/ExecutionEngine/JIT/JIT.cpp b/llvm/lib/ExecutionEngine/JIT/JIT.cpp
deleted file mode 100644
index b7ab6470c21..00000000000
--- a/llvm/lib/ExecutionEngine/JIT/JIT.cpp
+++ /dev/null
@@ -1,694 +0,0 @@
-//===-- JIT.cpp - LLVM Just in Time Compiler ------------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This tool implements a just-in-time compiler for LLVM, allowing direct
-// execution of LLVM bitcode in an efficient manner.
-//
-//===----------------------------------------------------------------------===//
-
-#include "JIT.h"
-#include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/CodeGen/JITCodeEmitter.h"
-#include "llvm/CodeGen/MachineCodeInfo.h"
-#include "llvm/Config/config.h"
-#include "llvm/ExecutionEngine/GenericValue.h"
-#include "llvm/ExecutionEngine/JITEventListener.h"
-#include "llvm/ExecutionEngine/JITMemoryManager.h"
-#include "llvm/IR/Constants.h"
-#include "llvm/IR/DataLayout.h"
-#include "llvm/IR/DerivedTypes.h"
-#include "llvm/IR/Function.h"
-#include "llvm/IR/GlobalVariable.h"
-#include "llvm/IR/Instructions.h"
-#include "llvm/IR/Module.h"
-#include "llvm/Support/Dwarf.h"
-#include "llvm/Support/DynamicLibrary.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/ManagedStatic.h"
-#include "llvm/Support/MutexGuard.h"
-#include "llvm/Target/TargetJITInfo.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetSubtargetInfo.h"
-
-using namespace llvm;
-
-#ifdef __APPLE__
-// Apple gcc defaults to -fuse-cxa-atexit (i.e. calls __cxa_atexit instead
-// of atexit). It passes the address of linker generated symbol __dso_handle
-// to the function.
-// This configuration change happened at version 5330.
-# include <AvailabilityMacros.h>
-# if defined(MAC_OS_X_VERSION_10_4) && \
-     ((MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4) || \
-      (MAC_OS_X_VERSION_MIN_REQUIRED == MAC_OS_X_VERSION_10_4 && \
-       __APPLE_CC__ >= 5330))
-#  ifndef HAVE___DSO_HANDLE
-#   define HAVE___DSO_HANDLE 1
-#  endif
-# endif
-#endif
-
-#if HAVE___DSO_HANDLE
-extern void *__dso_handle __attribute__ ((__visibility__ ("hidden")));
-#endif
-
-namespace {
-
-static struct RegisterJIT {
-  RegisterJIT() { JIT::Register(); }
-} JITRegistrator;
-
-}
-
-extern "C" void LLVMLinkInJIT() {
-}
-
-/// This is the factory method for creating a JIT for the current machine, it
-/// does not fall back to the interpreter.
-ExecutionEngine *JIT::createJIT(std::unique_ptr<Module> M,
-                                std::string *ErrorStr,
-                                JITMemoryManager *JMM,
-                                bool GVsWithCode,
-                                TargetMachine *TM) {
-  // Try to register the program as a source of symbols to resolve against.
-  //
-  // FIXME: Don't do this here.
-  sys::DynamicLibrary::LoadLibraryPermanently(nullptr, nullptr);
-
-  // If the target supports JIT code generation, create the JIT.
-  if (TargetJITInfo *TJ = TM->getSubtargetImpl()->getJITInfo()) {
-    return new JIT(std::move(M), *TM, *TJ, JMM, GVsWithCode);
-  } else {
-    if (ErrorStr)
-      *ErrorStr = "target does not support JIT code generation";
-    return nullptr;
-  }
-}
-
-namespace {
-/// This class supports the global getPointerToNamedFunction(), which allows
-/// bugpoint or gdb users to search for a function by name without any context.
-class JitPool {
-  SmallPtrSet<JIT*, 1> JITs;  // Optimize for process containing just 1 JIT.
-  mutable sys::Mutex Lock;
-public:
-  void Add(JIT *jit) {
-    MutexGuard guard(Lock);
-    JITs.insert(jit);
-  }
-  void Remove(JIT *jit) {
-    MutexGuard guard(Lock);
-    JITs.erase(jit);
-  }
-  void *getPointerToNamedFunction(const char *Name) const {
-    MutexGuard guard(Lock);
-    assert(JITs.size() != 0 && "No Jit registered");
-    //search function in every instance of JIT
-    for (JIT *Jit : JITs) {
-      if (Function *F = Jit->FindFunctionNamed(Name))
-        return Jit->getPointerToFunction(F);
-    }
-    // The function is not available : fallback on the first created (will
-    // search in symbol of the current program/library)
-    return (*JITs.begin())->getPointerToNamedFunction(Name);
-  }
-};
-ManagedStatic<JitPool> AllJits;
-}
-extern "C" {
-  // getPointerToNamedFunction - This function is used as a global wrapper to
-  // JIT::getPointerToNamedFunction for the purpose of resolving symbols when
-  // bugpoint is debugging the JIT. In that scenario, we are loading an .so and
-  // need to resolve function(s) that are being mis-codegenerated, so we need to
-  // resolve their addresses at runtime, and this is the way to do it.
-  void *getPointerToNamedFunction(const char *Name) {
-    return AllJits->getPointerToNamedFunction(Name);
-  }
-}
-
-JIT::JIT(std::unique_ptr<Module> M, TargetMachine &tm, TargetJITInfo &tji,
-         JITMemoryManager *jmm, bool GVsWithCode)
-  : ExecutionEngine(std::move(M)), TM(tm), TJI(tji),
-    JMM(jmm ? jmm : JITMemoryManager::CreateDefaultMemManager()),
-    AllocateGVsWithCode(GVsWithCode), isAlreadyCodeGenerating(false) {
-  setDataLayout(TM.getSubtargetImpl()->getDataLayout());
-
-  Module *Mod = Modules.back().get();
-  jitstate = new JITState(Mod);
-
-  // Initialize JCE
-  JCE = createEmitter(*this, JMM, TM);
-
-  // Register in global list of all JITs.
-  AllJits->Add(this);
-
-  // Add target data
-  MutexGuard locked(lock);
-  FunctionPassManager &PM = jitstate->getPM();
-  Mod->setDataLayout(TM.getSubtargetImpl()->getDataLayout());
-  PM.add(new DataLayoutPass(Mod));
-
-  // Turn the machine code intermediate representation into bytes in memory that
-  // may be executed.
-  if (TM.addPassesToEmitMachineCode(PM, *JCE, !getVerifyModules())) {
-    report_fatal_error("Target does not support machine code emission!");
-  }
-
-  // Initialize passes.
-  PM.doInitialization();
-}
-
-JIT::~JIT() {
-  // Cleanup.
-  AllJits->Remove(this);
-  delete jitstate;
-  delete JCE;
-  // JMM is a ownership of JCE, so we no need delete JMM here.
-  delete &TM;
-}
-
-/// Add a new Module to the JIT. If we previously removed the last Module, we
-/// need re-initialize jitstate with a valid Module.
-void JIT::addModule(std::unique_ptr<Module> M) {
-  MutexGuard locked(lock);
-
-  if (Modules.empty()) {
-    assert(!jitstate && "jitstate should be NULL if Modules vector is empty!");
-
-    jitstate = new JITState(M.get());
-
-    FunctionPassManager &PM = jitstate->getPM();
-    M->setDataLayout(TM.getSubtargetImpl()->getDataLayout());
-    PM.add(new DataLayoutPass(M.get()));
-
-    // Turn the machine code intermediate representation into bytes in memory
-    // that may be executed.
-    if (TM.addPassesToEmitMachineCode(PM, *JCE, !getVerifyModules())) {
-      report_fatal_error("Target does not support machine code emission!");
-    }
-
-    // Initialize passes.
-    PM.doInitialization();
-  }
-
-  ExecutionEngine::addModule(std::move(M));
-}
-
-///  If we are removing the last Module, invalidate the jitstate since the
-///  PassManager it contains references a released Module.
-bool JIT::removeModule(Module *M) {
-  bool result = ExecutionEngine::removeModule(M);
-
-  MutexGuard locked(lock);
-
-  if (jitstate && jitstate->getModule() == M) {
-    delete jitstate;
-    jitstate = nullptr;
-  }
-
-  if (!jitstate && !Modules.empty()) {
-    jitstate = new JITState(Modules[0].get());
-
-    FunctionPassManager &PM = jitstate->getPM();
-    M->setDataLayout(TM.getSubtargetImpl()->getDataLayout());
-    PM.add(new DataLayoutPass(M));
-
-    // Turn the machine code intermediate representation into bytes in memory
-    // that may be executed.
-    if (TM.addPassesToEmitMachineCode(PM, *JCE, !getVerifyModules())) {
-      report_fatal_error("Target does not support machine code emission!");
-    }
-
-    // Initialize passes.
-    PM.doInitialization();
-  }
-  return result;
-}
-
-/// run - Start execution with the specified function and arguments.
-///
-GenericValue JIT::runFunction(Function *F,
-                              const std::vector<GenericValue> &ArgValues) {
-  assert(F && "Function *F was null at entry to run()");
-
-  void *FPtr = getPointerToFunction(F);
-  assert(FPtr && "Pointer to fn's code was null after getPointerToFunction");
-  FunctionType *FTy = F->getFunctionType();
-  Type *RetTy = FTy->getReturnType();
-
-  assert((FTy->getNumParams() == ArgValues.size() ||
-          (FTy->isVarArg() && FTy->getNumParams() <= ArgValues.size())) &&
-         "Wrong number of arguments passed into function!");
-  assert(FTy->getNumParams() == ArgValues.size() &&
-         "This doesn't support passing arguments through varargs (yet)!");
-
-  // Handle some common cases first.  These cases correspond to common `main'
-  // prototypes.
-  if (RetTy->isIntegerTy(32) || RetTy->isVoidTy()) {
-    switch (ArgValues.size()) {
-    case 3:
-      if (FTy->getParamType(0)->isIntegerTy(32) &&
-          FTy->getParamType(1)->isPointerTy() &&
-          FTy->getParamType(2)->isPointerTy()) {
-        int (*PF)(int, char **, const char **) =
-          (int(*)(int, char **, const char **))(intptr_t)FPtr;
-
-        // Call the function.
-        GenericValue rv;
-        rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue(),
-                                 (char **)GVTOP(ArgValues[1]),
-                                 (const char **)GVTOP(ArgValues[2])));
-        return rv;
-      }
-      break;
-    case 2:
-      if (FTy->getParamType(0)->isIntegerTy(32) &&
-          FTy->getParamType(1)->isPointerTy()) {
-        int (*PF)(int, char **) = (int(*)(int, char **))(intptr_t)FPtr;
-
-        // Call the function.
-        GenericValue rv;
-        rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue(),
-                                 (char **)GVTOP(ArgValues[1])));
-        return rv;
-      }
-      break;
-    case 1:
-      if (FTy->getParamType(0)->isIntegerTy(32)) {
-        GenericValue rv;
-        int (*PF)(int) = (int(*)(int))(intptr_t)FPtr;
-        rv.IntVal = APInt(32, PF(ArgValues[0].IntVal.getZExtValue()));
-        return rv;
-      }
-      if (FTy->getParamType(0)->isPointerTy()) {
-        GenericValue rv;
-        int (*PF)(char *) = (int(*)(char *))(intptr_t)FPtr;
-        rv.IntVal = APInt(32, PF((char*)GVTOP(ArgValues[0])));
-        return rv;
-      }
-      break;
-    }
-  }
-
-  // Handle cases where no arguments are passed first.
-  if (ArgValues.empty()) {
-    GenericValue rv;
-    switch (RetTy->getTypeID()) {
-    default: llvm_unreachable("Unknown return type for function call!");
-    case Type::IntegerTyID: {
-      unsigned BitWidth = cast<IntegerType>(RetTy)->getBitWidth();
-      if (BitWidth == 1)
-        rv.IntVal = APInt(BitWidth, ((bool(*)())(intptr_t)FPtr)());
-      else if (BitWidth <= 8)
-        rv.IntVal = APInt(BitWidth, ((char(*)())(intptr_t)FPtr)());
-      else if (BitWidth <= 16)
-        rv.IntVal = APInt(BitWidth, ((short(*)())(intptr_t)FPtr)());
-      else if (BitWidth <= 32)
-        rv.IntVal = APInt(BitWidth, ((int(*)())(intptr_t)FPtr)());
-      else if (BitWidth <= 64)
-        rv.IntVal = APInt(BitWidth, ((int64_t(*)())(intptr_t)FPtr)());
-      else
-        llvm_unreachable("Integer types > 64 bits not supported");
-      return rv;
-    }
-    case Type::VoidTyID:
-      rv.IntVal = APInt(32, ((int(*)())(intptr_t)FPtr)());
-      return rv;
-    case Type::FloatTyID:
-      rv.FloatVal = ((float(*)())(intptr_t)FPtr)();
-      return rv;
-    case Type::DoubleTyID:
-      rv.DoubleVal = ((double(*)())(intptr_t)FPtr)();
-      return rv;
-    case Type::X86_FP80TyID:
-    case Type::FP128TyID:
-    case Type::PPC_FP128TyID:
-      llvm_unreachable("long double not supported yet");
-    case Type::PointerTyID:
-      return PTOGV(((void*(*)())(intptr_t)FPtr)());
-    }
-  }
-
-  // Okay, this is not one of our quick and easy cases.  Because we don't have a
-  // full FFI, we have to codegen a nullary stub function that just calls the
-  // function we are interested in, passing in constants for all of the
-  // arguments.  Make this function and return.
-
-  // First, create the function.
-  FunctionType *STy=FunctionType::get(RetTy, false);
-  Function *Stub = Function::Create(STy, Function::InternalLinkage, "",
-                                    F->getParent());
-
-  // Insert a basic block.
-  BasicBlock *StubBB = BasicBlock::Create(F->getContext(), "", Stub);
-
-  // Convert all of the GenericValue arguments over to constants.  Note that we
-  // currently don't support varargs.
-  SmallVector<Value*, 8> Args;
-  for (unsigned i = 0, e = ArgValues.size(); i != e; ++i) {
-    Constant *C = nullptr;
-    Type *ArgTy = FTy->getParamType(i);
-    const GenericValue &AV = ArgValues[i];
-    switch (ArgTy->getTypeID()) {
-    default: llvm_unreachable("Unknown argument type for function call!");
-    case Type::IntegerTyID:
-        C = ConstantInt::get(F->getContext(), AV.IntVal);
-        break;
-    case Type::FloatTyID:
-        C = ConstantFP::get(F->getContext(), APFloat(AV.FloatVal));
-        break;
-    case Type::DoubleTyID:
-        C = ConstantFP::get(F->getContext(), APFloat(AV.DoubleVal));
-        break;
-    case Type::PPC_FP128TyID:
-    case Type::X86_FP80TyID:
-    case Type::FP128TyID:
-        C = ConstantFP::get(F->getContext(), APFloat(ArgTy->getFltSemantics(),
-                                                     AV.IntVal));
-        break;
-    case Type::PointerTyID:
-      void *ArgPtr = GVTOP(AV);
-      if (sizeof(void*) == 4)
-        C = ConstantInt::get(Type::getInt32Ty(F->getContext()),
-                             (int)(intptr_t)ArgPtr);
-      else
-        C = ConstantInt::get(Type::getInt64Ty(F->getContext()),
-                             (intptr_t)ArgPtr);
-      // Cast the integer to pointer
-      C = ConstantExpr::getIntToPtr(C, ArgTy);
-      break;
-    }
-    Args.push_back(C);
-  }
-
-  CallInst *TheCall = CallInst::Create(F, Args, "", StubBB);
-  TheCall->setCallingConv(F->getCallingConv());
-  TheCall->setTailCall();
-  if (!TheCall->getType()->isVoidTy())
-    // Return result of the call.
-    ReturnInst::Create(F->getContext(), TheCall, StubBB);
-  else
-    ReturnInst::Create(F->getContext(), StubBB);           // Just return void.
-
-  // Finally, call our nullary stub function.
-  GenericValue Result = runFunction(Stub, std::vector<GenericValue>());
-  // Erase it, since no other function can have a reference to it.
-  Stub->eraseFromParent();
-  // And return the result.
-  return Result;
-}
-
-void JIT::RegisterJITEventListener(JITEventListener *L) {
-  if (!L)
-    return;
-  MutexGuard locked(lock);
-  EventListeners.push_back(L);
-}
-void JIT::UnregisterJITEventListener(JITEventListener *L) {
-  if (!L)
-    return;
-  MutexGuard locked(lock);
-  std::vector<JITEventListener*>::reverse_iterator I=
-      std::find(EventListeners.rbegin(), EventListeners.rend(), L);
-  if (I != EventListeners.rend()) {
-    std::swap(*I, EventListeners.back());
-    EventListeners.pop_back();
-  }
-}
-void JIT::NotifyFunctionEmitted(
-    const Function &F,
-    void *Code, size_t Size,
-    const JITEvent_EmittedFunctionDetails &Details) {
-  MutexGuard locked(lock);
-  for (unsigned I = 0, S = EventListeners.size(); I < S; ++I) {
-    EventListeners[I]->NotifyFunctionEmitted(F, Code, Size, Details);
-  }
-}
-
-void JIT::NotifyFreeingMachineCode(void *OldPtr) {
-  MutexGuard locked(lock);
-  for (unsigned I = 0, S = EventListeners.size(); I < S; ++I) {
-    EventListeners[I]->NotifyFreeingMachineCode(OldPtr);
-  }
-}
-
-/// runJITOnFunction - Run the FunctionPassManager full of
-/// just-in-time compilation passes on F, hopefully filling in
-/// GlobalAddress[F] with the address of F's machine code.
-///
-void JIT::runJITOnFunction(Function *F, MachineCodeInfo *MCI) {
-  MutexGuard locked(lock);
-
-  class MCIListener : public JITEventListener {
-    MachineCodeInfo *const MCI;
-   public:
-    MCIListener(MachineCodeInfo *mci) : MCI(mci) {}
-    void NotifyFunctionEmitted(const Function &, void *Code, size_t Size,
-                               const EmittedFunctionDetails &) override {
-      MCI->setAddress(Code);
-      MCI->setSize(Size);
-    }
-  };
-  MCIListener MCIL(MCI);
-  if (MCI)
-    RegisterJITEventListener(&MCIL);
-
-  runJITOnFunctionUnlocked(F);
-
-  if (MCI)
-    UnregisterJITEventListener(&MCIL);
-}
-
-void JIT::runJITOnFunctionUnlocked(Function *F) {
-  assert(!isAlreadyCodeGenerating && "Error: Recursive compilation detected!");
-
-  jitTheFunctionUnlocked(F);
-
-  // If the function referred to another function that had not yet been
-  // read from bitcode, and we are jitting non-lazily, emit it now.
-  while (!jitstate->getPendingFunctions().empty()) {
-    Function *PF = jitstate->getPendingFunctions().back();
-    jitstate->getPendingFunctions().pop_back();
-
-    assert(!PF->hasAvailableExternallyLinkage() &&
-           "Externally-defined function should not be in pending list.");
-
-    jitTheFunctionUnlocked(PF);
-
-    // Now that the function has been jitted, ask the JITEmitter to rewrite
-    // the stub with real address of the function.
-    updateFunctionStubUnlocked(PF);
-  }
-}
-
-void JIT::jitTheFunctionUnlocked(Function *F) {
-  isAlreadyCodeGenerating = true;
-  jitstate->getPM().run(*F);
-  isAlreadyCodeGenerating = false;
-
-  // clear basic block addresses after this function is done
-  getBasicBlockAddressMap().clear();
-}
-
-/// getPointerToFunction - This method is used to get the address of the
-/// specified function, compiling it if necessary.
-///
-void *JIT::getPointerToFunction(Function *F) {
-
-  if (void *Addr = getPointerToGlobalIfAvailable(F))
-    return Addr;   // Check if function already code gen'd
-
-  MutexGuard locked(lock);
-
-  // Now that this thread owns the lock, make sure we read in the function if it
-  // exists in this Module.
-  std::string ErrorMsg;
-  if (F->Materialize(&ErrorMsg)) {
-    report_fatal_error("Error reading function '" + F->getName()+
-                      "' from bitcode file: " + ErrorMsg);
-  }
-
-  // ... and check if another thread has already code gen'd the function.
-  if (void *Addr = getPointerToGlobalIfAvailable(F))
-    return Addr;
-
-  if (F->isDeclaration() || F->hasAvailableExternallyLinkage()) {
-    bool AbortOnFailure = !F->hasExternalWeakLinkage();
-    void *Addr = getPointerToNamedFunction(F->getName(), AbortOnFailure);
-    addGlobalMapping(F, Addr);
-    return Addr;
-  }
-
-  runJITOnFunctionUnlocked(F);
-
-  void *Addr = getPointerToGlobalIfAvailable(F);
-  assert(Addr && "Code generation didn't add function to GlobalAddress table!");
-  return Addr;
-}
-
-void JIT::addPointerToBasicBlock(const BasicBlock *BB, void *Addr) {
-  MutexGuard locked(lock);
-
-  BasicBlockAddressMapTy::iterator I =
-    getBasicBlockAddressMap().find(BB);
-  if (I == getBasicBlockAddressMap().end()) {
-    getBasicBlockAddressMap()[BB] = Addr;
-  } else {
-    // ignore repeats: some BBs can be split into few MBBs?
-  }
-}
-
-void JIT::clearPointerToBasicBlock(const BasicBlock *BB) {
-  MutexGuard locked(lock);
-  getBasicBlockAddressMap().erase(BB);
-}
-
-void *JIT::getPointerToBasicBlock(BasicBlock *BB) {
-  // make sure it's function is compiled by JIT
-  (void)getPointerToFunction(BB->getParent());
-
-  // resolve basic block address
-  MutexGuard locked(lock);
-
-  BasicBlockAddressMapTy::iterator I =
-    getBasicBlockAddressMap().find(BB);
-  if (I != getBasicBlockAddressMap().end()) {
-    return I->second;
-  } else {
-    llvm_unreachable("JIT does not have BB address for address-of-label, was"
-                     " it eliminated by optimizer?");
-  }
-}
-
-void *JIT::getPointerToNamedFunction(const std::string &Name,
-                                     bool AbortOnFailure){
-  if (!isSymbolSearchingDisabled()) {
-    void *ptr = JMM->getPointerToNamedFunction(Name, false);
-    if (ptr)
-      return ptr;
-  }
-
-  /// If a LazyFunctionCreator is installed, use it to get/create the function.
-  if (LazyFunctionCreator)
-    if (void *RP = LazyFunctionCreator(Name))
-      return RP;
-
-  if (AbortOnFailure) {
-    report_fatal_error("Program used external function '"+Name+
-                      "' which could not be resolved!");
-  }
-  return nullptr;
-}
-
-
-/// getOrEmitGlobalVariable - Return the address of the specified global
-/// variable, possibly emitting it to memory if needed.  This is used by the
-/// Emitter.
-void *JIT::getOrEmitGlobalVariable(const GlobalVariable *GV) {
-  MutexGuard locked(lock);
-
-  void *Ptr = getPointerToGlobalIfAvailable(GV);
-  if (Ptr) return Ptr;
-
-  // If the global is external, just remember the address.
-  if (GV->isDeclaration() || GV->hasAvailableExternallyLinkage()) {
-#if HAVE___DSO_HANDLE
-    if (GV->getName() == "__dso_handle")
-      return (void*)&__dso_handle;
-#endif
-    Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(GV->getName());
-    if (!Ptr) {
-      report_fatal_error("Could not resolve external global address: "
-                        +GV->getName());
-    }
-    addGlobalMapping(GV, Ptr);
-  } else {
-    // If the global hasn't been emitted to memory yet, allocate space and
-    // emit it into memory.
-    Ptr = getMemoryForGV(GV);
-    addGlobalMapping(GV, Ptr);
-    EmitGlobalVariable(GV);  // Initialize the variable.
-  }
-  return Ptr;
-}
-
-/// recompileAndRelinkFunction - This method is used to force a function
-/// which has already been compiled, to be compiled again, possibly
-/// after it has been modified. Then the entry to the old copy is overwritten
-/// with a branch to the new copy. If there was no old copy, this acts
-/// just like JIT::getPointerToFunction().
-///
-void *JIT::recompileAndRelinkFunction(Function *F) {
-  void *OldAddr = getPointerToGlobalIfAvailable(F);
-
-  // If it's not already compiled there is no reason to patch it up.
-  if (!OldAddr) return getPointerToFunction(F);
-
-  // Delete the old function mapping.
-  addGlobalMapping(F, nullptr);
-
-  // Recodegen the function
-  runJITOnFunction(F);
-
-  // Update state, forward the old function to the new function.
-  void *Addr = getPointerToGlobalIfAvailable(F);
-  assert(Addr && "Code generation didn't add function to GlobalAddress table!");
-  TJI.replaceMachineCodeForFunction(OldAddr, Addr);
-  return Addr;
-}
-
-/// getMemoryForGV - This method abstracts memory allocation of global
-/// variable so that the JIT can allocate thread local variables depending
-/// on the target.
-///
-char* JIT::getMemoryForGV(const GlobalVariable* GV) {
-  char *Ptr;
-
-  // GlobalVariable's which are not "constant" will cause trouble in a server
-  // situation. It's returned in the same block of memory as code which may
-  // not be writable.
-  if (isGVCompilationDisabled() && !GV->isConstant()) {
-    report_fatal_error("Compilation of non-internal GlobalValue is disabled!");
-  }
-
-  // Some applications require globals and code to live together, so they may
-  // be allocated into the same buffer, but in general globals are allocated
-  // through the memory manager which puts them near the code but not in the
-  // same buffer.
-  Type *GlobalType = GV->getType()->getElementType();
-  size_t S = getDataLayout()->getTypeAllocSize(GlobalType);
-  size_t A = getDataLayout()->getPreferredAlignment(GV);
-  if (GV->isThreadLocal()) {
-    MutexGuard locked(lock);
-    Ptr = TJI.allocateThreadLocalMemory(S);
-  } else if (TJI.allocateSeparateGVMemory()) {
-    if (A <= 8) {
-      Ptr = (char*)malloc(S);
-    } else {
-      // Allocate S+A bytes of memory, then use an aligned pointer within that
-      // space.
-      Ptr = (char*)malloc(S+A);
-      unsigned MisAligned = ((intptr_t)Ptr & (A-1));
-      Ptr = Ptr + (MisAligned ? (A-MisAligned) : 0);
-    }
-  } else if (AllocateGVsWithCode) {
-    Ptr = (char*)JCE->allocateSpace(S, A);
-  } else {
-    Ptr = (char*)JCE->allocateGlobal(S, A);
-  }
-  return Ptr;
-}
-
-void JIT::addPendingFunction(Function *F) {
-  MutexGuard locked(lock);
-  jitstate->getPendingFunctions().push_back(F);
-}
-
-
-JITEventListener::~JITEventListener() {}
diff --git a/llvm/lib/ExecutionEngine/JIT/JIT.h b/llvm/lib/ExecutionEngine/JIT/JIT.h
deleted file mode 100644
index c3bc740d7ec..00000000000
--- a/llvm/lib/ExecutionEngine/JIT/JIT.h
+++ /dev/null
@@ -1,214 +0,0 @@
-//===-- JIT.h - Class definition for the JIT --------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file defines the top-level JIT data structure.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_LIB_EXECUTIONENGINE_JIT_JIT_H
-#define LLVM_LIB_EXECUTIONENGINE_JIT_JIT_H
-
-#include "llvm/ExecutionEngine/ExecutionEngine.h"
-#include "llvm/IR/ValueHandle.h"
-#include "llvm/PassManager.h"
-
-namespace llvm {
-
-class Function;
-struct JITEvent_EmittedFunctionDetails;
-class MachineCodeEmitter;
-class MachineCodeInfo;
-class TargetJITInfo;
-class TargetMachine;
-
-class JITState {
-private:
-  FunctionPassManager PM;  // Passes to compile a function
-  Module *M;               // Module used to create the PM
-
-  /// PendingFunctions - Functions which have not been code generated yet, but
-  /// were called from a function being code generated.
-  std::vector<AssertingVH<Function> > PendingFunctions;
-
-public:
-  explicit JITState(Module *M) : PM(M), M(M) {}
-
-  FunctionPassManager &getPM() {
-    return PM;
-  }
-
-  Module *getModule() const { return M; }
-  std::vector<AssertingVH<Function> > &getPendingFunctions() {
-    return PendingFunctions;
-  }
-};
-
-
-class JIT : public ExecutionEngine {
-  /// types
-  typedef ValueMap<const BasicBlock *, void *>
-      BasicBlockAddressMapTy;
-  /// data
-  TargetMachine &TM;       // The current target we are compiling to
-  TargetJITInfo &TJI;      // The JITInfo for the target we are compiling to
-  JITCodeEmitter *JCE;     // JCE object
-  JITMemoryManager *JMM;
-  std::vector<JITEventListener*> EventListeners;
-
-  /// AllocateGVsWithCode - Some applications require that global variables and
-  /// code be allocated into the same region of memory, in which case this flag
-  /// should be set to true.  Doing so breaks freeMachineCodeForFunction.
-  bool AllocateGVsWithCode;
-
-  /// True while the JIT is generating code.  Used to assert against recursive
-  /// entry.
-  bool isAlreadyCodeGenerating;
-
-  JITState *jitstate;
-
-  /// BasicBlockAddressMap - A mapping between LLVM basic blocks and their
-  /// actualized version, only filled for basic blocks that have their address
-  /// taken.
-  BasicBlockAddressMapTy BasicBlockAddressMap;
-
-
-  JIT(std::unique_ptr<Module> M, TargetMachine &tm, TargetJITInfo &tji,
-      JITMemoryManager *JMM, bool AllocateGVsWithCode);
-public:
-  ~JIT();
-
-  static void Register() {
-    JITCtor = createJIT;
-  }
-
-  /// getJITInfo - Return the target JIT information structure.
-  ///
-  TargetJITInfo &getJITInfo() const { return TJI; }
-
-  void addModule(std::unique_ptr<Module> M) override;
-
-  /// removeModule - Remove a Module from the list of modules.  Returns true if
-  /// M is found.
-  bool removeModule(Module *M) override;
-
-  /// runFunction - Start execution with the specified function and arguments.
-  ///
-  GenericValue runFunction(Function *F,
-                           const std::vector<GenericValue> &ArgValues) override;
-
-  /// getPointerToNamedFunction - This method returns the address of the
-  /// specified function by using the MemoryManager. As such it is only
-  /// useful for resolving library symbols, not code generated symbols.
-  ///
-  /// If AbortOnFailure is false and no function with the given name is
-  /// found, this function silently returns a null pointer. Otherwise,
-  /// it prints a message to stderr and aborts.
-  ///
-  void *getPointerToNamedFunction(const std::string &Name,
-                                  bool AbortOnFailure = true) override;
-
-  // CompilationCallback - Invoked the first time that a call site is found,
-  // which causes lazy compilation of the target function.
-  //
-  static void CompilationCallback();
-
-  /// getPointerToFunction - This returns the address of the specified function,
-  /// compiling it if necessary.
-  ///
-  void *getPointerToFunction(Function *F) override;
-
-  /// addPointerToBasicBlock - Adds address of the specific basic block.
-  void addPointerToBasicBlock(const BasicBlock *BB, void *Addr);
-
-  /// clearPointerToBasicBlock - Removes address of specific basic block.
-  void clearPointerToBasicBlock(const BasicBlock *BB);
-
-  /// getPointerToBasicBlock - This returns the address of the specified basic
-  /// block, assuming function is compiled.
-  void *getPointerToBasicBlock(BasicBlock *BB) override;
-
-  /// getOrEmitGlobalVariable - Return the address of the specified global
-  /// variable, possibly emitting it to memory if needed.  This is used by the
-  /// Emitter.
-  void *getOrEmitGlobalVariable(const GlobalVariable *GV) override;
-
-  /// getPointerToFunctionOrStub - If the specified function has been
-  /// code-gen'd, return a pointer to the function.  If not, compile it, or use
-  /// a stub to implement lazy compilation if available.
-  ///
-  void *getPointerToFunctionOrStub(Function *F) override;
-
-  /// recompileAndRelinkFunction - This method is used to force a function
-  /// which has already been compiled, to be compiled again, possibly
-  /// after it has been modified. Then the entry to the old copy is overwritten
-  /// with a branch to the new copy. If there was no old copy, this acts
-  /// just like JIT::getPointerToFunction().
-  ///
-  void *recompileAndRelinkFunction(Function *F) override;
-
-  /// freeMachineCodeForFunction - deallocate memory used to code-generate this
-  /// Function.
-  ///
-  void freeMachineCodeForFunction(Function *F) override;
-
-  /// addPendingFunction - while jitting non-lazily, a called but non-codegen'd
-  /// function was encountered.  Add it to a pending list to be processed after
-  /// the current function.
-  ///
-  void addPendingFunction(Function *F);
-
-  /// getCodeEmitter - Return the code emitter this JIT is emitting into.
-  ///
-  JITCodeEmitter *getCodeEmitter() const { return JCE; }
-
-  static ExecutionEngine *createJIT(std::unique_ptr<Module> M,
-                                    std::string *ErrorStr,
-                                    JITMemoryManager *JMM,
-                                    bool GVsWithCode,
-                                    TargetMachine *TM);
-
-  // Run the JIT on F and return information about the generated code
-  void runJITOnFunction(Function *F, MachineCodeInfo *MCI = nullptr) override;
-
-  void RegisterJITEventListener(JITEventListener *L) override;
-  void UnregisterJITEventListener(JITEventListener *L) override;
-
-  TargetMachine *getTargetMachine() override { return &TM; }
-
-  /// These functions correspond to the methods on JITEventListener.  They
-  /// iterate over the registered listeners and call the corresponding method on
-  /// each.
-  void NotifyFunctionEmitted(
-      const Function &F, void *Code, size_t Size,
-      const JITEvent_EmittedFunctionDetails &Details);
-  void NotifyFreeingMachineCode(void *OldPtr);
-
-  BasicBlockAddressMapTy &
-  getBasicBlockAddressMap() {
-    return BasicBlockAddressMap;
-  }
-
-
-private:
-  static JITCodeEmitter *createEmitter(JIT &J, JITMemoryManager *JMM,
-                                       TargetMachine &tm);
-  void runJITOnFunctionUnlocked(Function *F);
-  void updateFunctionStubUnlocked(Function *F);
-  void jitTheFunctionUnlocked(Function *F);
-
-protected:
-
-  /// getMemoryforGV - Allocate memory for a global variable.
-  char* getMemoryForGV(const GlobalVariable* GV) override;
-
-};
-
-} // End llvm namespace
-
-#endif
diff --git a/llvm/lib/ExecutionEngine/JIT/JITEmitter.cpp b/llvm/lib/ExecutionEngine/JIT/JITEmitter.cpp
deleted file mode 100644
index 61eb7f4c3ec..00000000000
--- a/llvm/lib/ExecutionEngine/JIT/JITEmitter.cpp
+++ /dev/null
@@ -1,1248 +0,0 @@
-//===-- JITEmitter.cpp - Write machine code to executable memory ----------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file defines a MachineCodeEmitter object that is used by the JIT to
-// write machine code to memory and remember where relocatable values are.
-//
-//===----------------------------------------------------------------------===//
-
-#include "JIT.h"
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/CodeGen/JITCodeEmitter.h"
-#include "llvm/CodeGen/MachineCodeInfo.h"
-#include "llvm/CodeGen/MachineConstantPool.h"
-#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/CodeGen/MachineJumpTableInfo.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
-#include "llvm/CodeGen/MachineRelocation.h"
-#include "llvm/ExecutionEngine/GenericValue.h"
-#include "llvm/ExecutionEngine/JITEventListener.h"
-#include "llvm/ExecutionEngine/JITMemoryManager.h"
-#include "llvm/IR/Constants.h"
-#include "llvm/IR/DataLayout.h"
-#include "llvm/IR/DebugInfo.h"
-#include "llvm/IR/DerivedTypes.h"
-#include "llvm/IR/Module.h"
-#include "llvm/IR/Operator.h"
-#include "llvm/IR/ValueHandle.h"
-#include "llvm/IR/ValueMap.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/ManagedStatic.h"
-#include "llvm/Support/Memory.h"
-#include "llvm/Support/MutexGuard.h"
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/Target/TargetJITInfo.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetOptions.h"
-#include <algorithm>
-#ifndef NDEBUG
-#include <iomanip>
-#endif
-using namespace llvm;
-
-#define DEBUG_TYPE "jit"
-
-STATISTIC(NumBytes, "Number of bytes of machine code compiled");
-STATISTIC(NumRelos, "Number of relocations applied");
-STATISTIC(NumRetries, "Number of retries with more memory");
-
-
-// A declaration may stop being a declaration once it's fully read from bitcode.
-// This function returns true if F is fully read and is still a declaration.
-static bool isNonGhostDeclaration(const Function *F) {
-  return F->isDeclaration() && !F->isMaterializable();
-}
-
-//===----------------------------------------------------------------------===//
-// JIT lazy compilation code.
-//
-namespace {
-  class JITEmitter;
-  class JITResolverState;
-
-  template<typename ValueTy>
-  struct NoRAUWValueMapConfig : public ValueMapConfig<ValueTy> {
-    typedef JITResolverState *ExtraData;
-    static void onRAUW(JITResolverState *, Value *Old, Value *New) {
-      llvm_unreachable("The JIT doesn't know how to handle a"
-                       " RAUW on a value it has emitted.");
-    }
-  };
-
-  struct CallSiteValueMapConfig : public NoRAUWValueMapConfig<Function*> {
-    typedef JITResolverState *ExtraData;
-    static void onDelete(JITResolverState *JRS, Function *F);
-  };
-
-  class JITResolverState {
-  public:
-    typedef ValueMap<Function*, void*, NoRAUWValueMapConfig<Function*> >
-      FunctionToLazyStubMapTy;
-    typedef std::map<void*, AssertingVH<Function> > CallSiteToFunctionMapTy;
-    typedef ValueMap<Function *, SmallPtrSet<void*, 1>,
-                     CallSiteValueMapConfig> FunctionToCallSitesMapTy;
-    typedef std::map<AssertingVH<GlobalValue>, void*> GlobalToIndirectSymMapTy;
-  private:
-    /// FunctionToLazyStubMap - Keep track of the lazy stub created for a
-    /// particular function so that we can reuse them if necessary.
-    FunctionToLazyStubMapTy FunctionToLazyStubMap;
-
-    /// CallSiteToFunctionMap - Keep track of the function that each lazy call
-    /// site corresponds to, and vice versa.
-    CallSiteToFunctionMapTy CallSiteToFunctionMap;
-    FunctionToCallSitesMapTy FunctionToCallSitesMap;
-
-    /// GlobalToIndirectSymMap - Keep track of the indirect symbol created for a
-    /// particular GlobalVariable so that we can reuse them if necessary.
-    GlobalToIndirectSymMapTy GlobalToIndirectSymMap;
-
-#ifndef NDEBUG
-    /// Instance of the JIT this ResolverState serves.
-    JIT *TheJIT;
-#endif
-
-  public:
-    JITResolverState(JIT *jit) : FunctionToLazyStubMap(this),
-                                 FunctionToCallSitesMap(this) {
-#ifndef NDEBUG
-      TheJIT = jit;
-#endif
-    }
-
-    FunctionToLazyStubMapTy& getFunctionToLazyStubMap() {
-      return FunctionToLazyStubMap;
-    }
-
-    GlobalToIndirectSymMapTy& getGlobalToIndirectSymMap() {
-      return GlobalToIndirectSymMap;
-    }
-
-    std::pair<void *, Function *> LookupFunctionFromCallSite(
-        void *CallSite) const {
-      // The address given to us for the stub may not be exactly right, it
-      // might be a little bit after the stub.  As such, use upper_bound to
-      // find it.
-      CallSiteToFunctionMapTy::const_iterator I =
-        CallSiteToFunctionMap.upper_bound(CallSite);
-      assert(I != CallSiteToFunctionMap.begin() &&
-             "This is not a known call site!");
-      --I;
-      return *I;
-    }
-
-    void AddCallSite(void *CallSite, Function *F) {
-      bool Inserted = CallSiteToFunctionMap.insert(
-          std::make_pair(CallSite, F)).second;
-      (void)Inserted;
-      assert(Inserted && "Pair was already in CallSiteToFunctionMap");
-      FunctionToCallSitesMap[F].insert(CallSite);
-    }
-
-    void EraseAllCallSitesForPrelocked(Function *F);
-
-    // Erases _all_ call sites regardless of their function.  This is used to
-    // unregister the stub addresses from the StubToResolverMap in
-    // ~JITResolver().
-    void EraseAllCallSitesPrelocked();
-  };
-
-  /// JITResolver - Keep track of, and resolve, call sites for functions that
-  /// have not yet been compiled.
-  class JITResolver {
-    typedef JITResolverState::FunctionToLazyStubMapTy FunctionToLazyStubMapTy;
-    typedef JITResolverState::CallSiteToFunctionMapTy CallSiteToFunctionMapTy;
-    typedef JITResolverState::GlobalToIndirectSymMapTy GlobalToIndirectSymMapTy;
-
-    /// LazyResolverFn - The target lazy resolver function that we actually
-    /// rewrite instructions to use.
-    TargetJITInfo::LazyResolverFn LazyResolverFn;
-
-    JITResolverState state;
-
-    /// ExternalFnToStubMap - This is the equivalent of FunctionToLazyStubMap
-    /// for external functions.  TODO: Of course, external functions don't need
-    /// a lazy stub.  It's actually here to make it more likely that far calls
-    /// succeed, but no single stub can guarantee that.  I'll remove this in a
-    /// subsequent checkin when I actually fix far calls.
-    std::map<void*, void*> ExternalFnToStubMap;
-
-    /// revGOTMap - map addresses to indexes in the GOT
-    std::map<void*, unsigned> revGOTMap;
-    unsigned nextGOTIndex;
-
-    JITEmitter &JE;
-
-    /// Instance of JIT corresponding to this Resolver.
-    JIT *TheJIT;
-
-  public:
-    explicit JITResolver(JIT &jit, JITEmitter &je)
-      : state(&jit), nextGOTIndex(0), JE(je), TheJIT(&jit) {
-      LazyResolverFn = jit.getJITInfo().getLazyResolverFunction(JITCompilerFn);
-    }
-
-    ~JITResolver();
-
-    /// getLazyFunctionStubIfAvailable - This returns a pointer to a function's
-    /// lazy-compilation stub if it has already been created.
-    void *getLazyFunctionStubIfAvailable(Function *F);
-
-    /// getLazyFunctionStub - This returns a pointer to a function's
-    /// lazy-compilation stub, creating one on demand as needed.
-    void *getLazyFunctionStub(Function *F);
-
-    /// getExternalFunctionStub - Return a stub for the function at the
-    /// specified address, created lazily on demand.
-    void *getExternalFunctionStub(void *FnAddr);
-
-    /// getGlobalValueIndirectSym - Return an indirect symbol containing the
-    /// specified GV address.
-    void *getGlobalValueIndirectSym(GlobalValue *V, void *GVAddress);
-
-    /// getGOTIndexForAddress - Return a new or existing index in the GOT for
-    /// an address.  This function only manages slots, it does not manage the
-    /// contents of the slots or the memory associated with the GOT.
-    unsigned getGOTIndexForAddr(void *addr);
-
-    /// JITCompilerFn - This function is called to resolve a stub to a compiled
-    /// address.  If the LLVM Function corresponding to the stub has not yet
-    /// been compiled, this function compiles it first.
-    static void *JITCompilerFn(void *Stub);
-  };
-
-  class StubToResolverMapTy {
-    /// Map a stub address to a specific instance of a JITResolver so that
-    /// lazily-compiled functions can find the right resolver to use.
-    ///
-    /// Guarded by Lock.
-    std::map<void*, JITResolver*> Map;
-
-    /// Guards Map from concurrent accesses.
-    mutable sys::Mutex Lock;
-
-  public:
-    /// Registers a Stub to be resolved by Resolver.
-    void RegisterStubResolver(void *Stub, JITResolver *Resolver) {
-      MutexGuard guard(Lock);
-      Map.insert(std::make_pair(Stub, Resolver));
-    }
-    /// Unregisters the Stub when it's invalidated.
-    void UnregisterStubResolver(void *Stub) {
-      MutexGuard guard(Lock);
-      Map.erase(Stub);
-    }
-    /// Returns the JITResolver instance that owns the Stub.
-    JITResolver *getResolverFromStub(void *Stub) const {
-      MutexGuard guard(Lock);
-      // The address given to us for the stub may not be exactly right, it might
-      // be a little bit after the stub.  As such, use upper_bound to find it.
-      // This is the same trick as in LookupFunctionFromCallSite from
-      // JITResolverState.
-      std::map<void*, JITResolver*>::const_iterator I = Map.upper_bound(Stub);
-      assert(I != Map.begin() && "This is not a known stub!");
-      --I;
-      return I->second;
-    }
-    /// True if any stubs refer to the given resolver. Only used in an assert().
-    /// O(N)
-    bool ResolverHasStubs(JITResolver* Resolver) const {
-      MutexGuard guard(Lock);
-      for (std::map<void*, JITResolver*>::const_iterator I = Map.begin(),
-             E = Map.end(); I != E; ++I) {
-        if (I->second == Resolver)
-          return true;
-      }
-      return false;
-    }
-  };
-  /// This needs to be static so that a lazy call stub can access it with no
-  /// context except the address of the stub.
-  ManagedStatic<StubToResolverMapTy> StubToResolverMap;
-
-  /// JITEmitter - The JIT implementation of the MachineCodeEmitter, which is
-  /// used to output functions to memory for execution.
-  class JITEmitter : public JITCodeEmitter {
-    JITMemoryManager *MemMgr;
-
-    // When outputting a function stub in the context of some other function, we
-    // save BufferBegin/BufferEnd/CurBufferPtr here.
-    uint8_t *SavedBufferBegin, *SavedBufferEnd, *SavedCurBufferPtr;
-
-    // When reattempting to JIT a function after running out of space, we store
-    // the estimated size of the function we're trying to JIT here, so we can
-    // ask the memory manager for at least this much space.  When we
-    // successfully emit the function, we reset this back to zero.
-    uintptr_t SizeEstimate;
-
-    /// Relocations - These are the relocations that the function needs, as
-    /// emitted.
-    std::vector<MachineRelocation> Relocations;
-
-    /// MBBLocations - This vector is a mapping from MBB ID's to their address.
-    /// It is filled in by the StartMachineBasicBlock callback and queried by
-    /// the getMachineBasicBlockAddress callback.
-    std::vector<uintptr_t> MBBLocations;
-
-    /// ConstantPool - The constant pool for the current function.
-    ///
-    MachineConstantPool *ConstantPool;
-
-    /// ConstantPoolBase - A pointer to the first entry in the constant pool.
-    ///
-    void *ConstantPoolBase;
-
-    /// ConstPoolAddresses - Addresses of individual constant pool entries.
-    ///
-    SmallVector<uintptr_t, 8> ConstPoolAddresses;
-
-    /// JumpTable - The jump tables for the current function.
-    ///
-    MachineJumpTableInfo *JumpTable;
-
-    /// JumpTableBase - A pointer to the first entry in the jump table.
-    ///
-    void *JumpTableBase;
-
-    /// Resolver - This contains info about the currently resolved functions.
-    JITResolver Resolver;
-
-    /// LabelLocations - This vector is a mapping from Label ID's to their
-    /// address.
-    DenseMap<MCSymbol*, uintptr_t> LabelLocations;
-
-    /// MMI - Machine module info for exception informations
-    MachineModuleInfo* MMI;
-
-    // CurFn - The llvm function being emitted.  Only valid during
-    // finishFunction().
-    const Function *CurFn;
-
-    /// Information about emitted code, which is passed to the
-    /// JITEventListeners.  This is reset in startFunction and used in
-    /// finishFunction.
-    JITEvent_EmittedFunctionDetails EmissionDetails;
-
-    struct EmittedCode {
-      void *FunctionBody;  // Beginning of the function's allocation.
-      void *Code;  // The address the function's code actually starts at.
-      void *ExceptionTable;
-      EmittedCode() : FunctionBody(nullptr), Code(nullptr),
-                      ExceptionTable(nullptr) {}
-    };
-    struct EmittedFunctionConfig : public ValueMapConfig<const Function*> {
-      typedef JITEmitter *ExtraData;
-      static void onDelete(JITEmitter *, const Function*);
-      static void onRAUW(JITEmitter *, const Function*, const Function*);
-    };
-    ValueMap<const Function *, EmittedCode,
-             EmittedFunctionConfig> EmittedFunctions;
-
-    DebugLoc PrevDL;
-
-    /// Instance of the JIT
-    JIT *TheJIT;
-
-  public:
-    JITEmitter(JIT &jit, JITMemoryManager *JMM, TargetMachine &TM)
-      : SizeEstimate(0), Resolver(jit, *this), MMI(nullptr), CurFn(nullptr),
-        EmittedFunctions(this), TheJIT(&jit) {
-      MemMgr = JMM ? JMM : JITMemoryManager::CreateDefaultMemManager();
-      if (jit.getJITInfo().needsGOT()) {
-        MemMgr->AllocateGOT();
-        DEBUG(dbgs() << "JIT is managing a GOT\n");
-      }
-
-    }
-    ~JITEmitter() {
-      delete MemMgr;
-    }
-
-    JITResolver &getJITResolver() { return Resolver; }
-
-    void startFunction(MachineFunction &F) override;
-    bool finishFunction(MachineFunction &F) override;
-
-    void emitConstantPool(MachineConstantPool *MCP);
-    void initJumpTableInfo(MachineJumpTableInfo *MJTI);
-    void emitJumpTableInfo(MachineJumpTableInfo *MJTI);
-
-    void startGVStub(const GlobalValue* GV,
-                     unsigned StubSize, unsigned Alignment = 1);
-    void startGVStub(void *Buffer, unsigned StubSize);
-    void finishGVStub();
-    void *allocIndirectGV(const GlobalValue *GV, const uint8_t *Buffer,
-                          size_t Size, unsigned Alignment) override;
-
-    /// allocateSpace - Reserves space in the current block if any, or
-    /// allocate a new one of the given size.
-    void *allocateSpace(uintptr_t Size, unsigned Alignment) override;
-
-    /// allocateGlobal - Allocate memory for a global.  Unlike allocateSpace,
-    /// this method does not allocate memory in the current output buffer,
-    /// because a global may live longer than the current function.
-    void *allocateGlobal(uintptr_t Size, unsigned Alignment) override;
-
-    void addRelocation(const MachineRelocation &MR) override {
-      Relocations.push_back(MR);
-    }
-
-    void StartMachineBasicBlock(MachineBasicBlock *MBB) override {
-      if (MBBLocations.size() <= (unsigned)MBB->getNumber())
-        MBBLocations.resize((MBB->getNumber()+1)*2);
-      MBBLocations[MBB->getNumber()] = getCurrentPCValue();
-      if (MBB->hasAddressTaken())
-        TheJIT->addPointerToBasicBlock(MBB->getBasicBlock(),
-                                       (void*)getCurrentPCValue());
-      DEBUG(dbgs() << "JIT: Emitting BB" << MBB->getNumber() << " at ["
-                   << (void*) getCurrentPCValue() << "]\n");
-    }
-
-    uintptr_t getConstantPoolEntryAddress(unsigned Entry) const override;
-    uintptr_t getJumpTableEntryAddress(unsigned Entry) const override;
-
-    uintptr_t
-    getMachineBasicBlockAddress(MachineBasicBlock *MBB) const override {
-      assert(MBBLocations.size() > (unsigned)MBB->getNumber() &&
-             MBBLocations[MBB->getNumber()] && "MBB not emitted!");
-      return MBBLocations[MBB->getNumber()];
-    }
-
-    /// retryWithMoreMemory - Log a retry and deallocate all memory for the
-    /// given function.  Increase the minimum allocation size so that we get
-    /// more memory next time.
-    void retryWithMoreMemory(MachineFunction &F);
-
-    /// deallocateMemForFunction - Deallocate all memory for the specified
-    /// function body.
-    void deallocateMemForFunction(const Function *F);
-
-    void processDebugLoc(DebugLoc DL, bool BeforePrintingInsn) override;
-
-    void emitLabel(MCSymbol *Label) override {
-      LabelLocations[Label] = getCurrentPCValue();
-    }
-
-    DenseMap<MCSymbol*, uintptr_t> *getLabelLocations() override {
-      return &LabelLocations;
-    }
-
-    uintptr_t getLabelAddress(MCSymbol *Label) const override {
-      assert(LabelLocations.count(Label) && "Label not emitted!");
-      return LabelLocations.find(Label)->second;
-    }
-
-    void setModuleInfo(MachineModuleInfo* Info) override {
-      MMI = Info;
-    }
-
-  private:
-    void *getPointerToGlobal(GlobalValue *GV, void *Reference,
-                             bool MayNeedFarStub);
-    void *getPointerToGVIndirectSym(GlobalValue *V, void *Reference);
-  };
-}
-
-void CallSiteValueMapConfig::onDelete(JITResolverState *JRS, Function *F) {
-  JRS->EraseAllCallSitesForPrelocked(F);
-}
-
-void JITResolverState::EraseAllCallSitesForPrelocked(Function *F) {
-  FunctionToCallSitesMapTy::iterator F2C = FunctionToCallSitesMap.find(F);
-  if (F2C == FunctionToCallSitesMap.end())
-    return;
-  StubToResolverMapTy &S2RMap = *StubToResolverMap;
-  for (void *C : F2C->second) {
-    S2RMap.UnregisterStubResolver(C);
-    bool Erased = CallSiteToFunctionMap.erase(C);
-    (void)Erased;
-    assert(Erased && "Missing call site->function mapping");
-  }
-  FunctionToCallSitesMap.erase(F2C);
-}
-
-void JITResolverState::EraseAllCallSitesPrelocked() {
-  StubToResolverMapTy &S2RMap = *StubToResolverMap;
-  for (CallSiteToFunctionMapTy::const_iterator
-         I = CallSiteToFunctionMap.begin(),
-         E = CallSiteToFunctionMap.end(); I != E; ++I) {
-    S2RMap.UnregisterStubResolver(I->first);
-  }
-  CallSiteToFunctionMap.clear();
-  FunctionToCallSitesMap.clear();
-}
-
-JITResolver::~JITResolver() {
-  // No need to lock because we're in the destructor, and state isn't shared.
-  state.EraseAllCallSitesPrelocked();
-  assert(!StubToResolverMap->ResolverHasStubs(this) &&
-         "Resolver destroyed with stubs still alive.");
-}
-
-/// getLazyFunctionStubIfAvailable - This returns a pointer to a function stub
-/// if it has already been created.
-void *JITResolver::getLazyFunctionStubIfAvailable(Function *F) {
-  MutexGuard locked(TheJIT->lock);
-
-  // If we already have a stub for this function, recycle it.
-  return state.getFunctionToLazyStubMap().lookup(F);
-}
-
-/// getFunctionStub - This returns a pointer to a function stub, creating
-/// one on demand as needed.
-void *JITResolver::getLazyFunctionStub(Function *F) {
-  MutexGuard locked(TheJIT->lock);
-
-  // If we already have a lazy stub for this function, recycle it.
-  void *&Stub = state.getFunctionToLazyStubMap()[F];
-  if (Stub) return Stub;
-
-  // Call the lazy resolver function if we are JIT'ing lazily.  Otherwise we
-  // must resolve the symbol now.
-  void *Actual = TheJIT->isCompilingLazily()
-    ? (void *)(intptr_t)LazyResolverFn : (void *)nullptr;
-
-  // If this is an external declaration, attempt to resolve the address now
-  // to place in the stub.
-  if (isNonGhostDeclaration(F) || F->hasAvailableExternallyLinkage()) {
-    Actual = TheJIT->getPointerToFunction(F);
-
-    // If we resolved the symbol to a null address (eg. a weak external)
-    // don't emit a stub. Return a null pointer to the application.
-    if (!Actual) return nullptr;
-  }
-
-  TargetJITInfo::StubLayout SL = TheJIT->getJITInfo().getStubLayout();
-  JE.startGVStub(F, SL.Size, SL.Alignment);
-  // Codegen a new stub, calling the lazy resolver or the actual address of the
-  // external function, if it was resolved.
-  Stub = TheJIT->getJITInfo().emitFunctionStub(F, Actual, JE);
-  JE.finishGVStub();
-
-  if (Actual != (void*)(intptr_t)LazyResolverFn) {
-    // If we are getting the stub for an external function, we really want the
-    // address of the stub in the GlobalAddressMap for the JIT, not the address
-    // of the external function.
-    TheJIT->updateGlobalMapping(F, Stub);
-  }
-
-  DEBUG(dbgs() << "JIT: Lazy stub emitted at [" << Stub << "] for function '"
-        << F->getName() << "'\n");
-
-  if (TheJIT->isCompilingLazily()) {
-    // Register this JITResolver as the one corresponding to this call site so
-    // JITCompilerFn will be able to find it.
-    StubToResolverMap->RegisterStubResolver(Stub, this);
-
-    // Finally, keep track of the stub-to-Function mapping so that the
-    // JITCompilerFn knows which function to compile!
-    state.AddCallSite(Stub, F);
-  } else if (!Actual) {
-    // If we are JIT'ing non-lazily but need to call a function that does not
-    // exist yet, add it to the JIT's work list so that we can fill in the
-    // stub address later.
-    assert(!isNonGhostDeclaration(F) && !F->hasAvailableExternallyLinkage() &&
-           "'Actual' should have been set above.");
-    TheJIT->addPendingFunction(F);
-  }
-
-  return Stub;
-}
-
-/// getGlobalValueIndirectSym - Return a lazy pointer containing the specified
-/// GV address.
-void *JITResolver::getGlobalValueIndirectSym(GlobalValue *GV, void *GVAddress) {
-  MutexGuard locked(TheJIT->lock);
-
-  // If we already have a stub for this global variable, recycle it.
-  void *&IndirectSym = state.getGlobalToIndirectSymMap()[GV];
-  if (IndirectSym) return IndirectSym;
-
-  // Otherwise, codegen a new indirect symbol.
-  IndirectSym = TheJIT->getJITInfo().emitGlobalValueIndirectSym(GV, GVAddress,
-                                                                JE);
-
-  DEBUG(dbgs() << "JIT: Indirect symbol emitted at [" << IndirectSym
-        << "] for GV '" << GV->getName() << "'\n");
-
-  return IndirectSym;
-}
-
-/// getExternalFunctionStub - Return a stub for the function at the
-/// specified address, created lazily on demand.
-void *JITResolver::getExternalFunctionStub(void *FnAddr) {
-  // If we already have a stub for this function, recycle it.
-  void *&Stub = ExternalFnToStubMap[FnAddr];
-  if (Stub) return Stub;
-
-  TargetJITInfo::StubLayout SL = TheJIT->getJITInfo().getStubLayout();
-  JE.startGVStub(nullptr, SL.Size, SL.Alignment);
-  Stub = TheJIT->getJITInfo().emitFunctionStub(nullptr, FnAddr, JE);
-  JE.finishGVStub();
-
-  DEBUG(dbgs() << "JIT: Stub emitted at [" << Stub
-               << "] for external function at '" << FnAddr << "'\n");
-  return Stub;
-}
-
-unsigned JITResolver::getGOTIndexForAddr(void* addr) {
-  unsigned idx = revGOTMap[addr];
-  if (!idx) {
-    idx = ++nextGOTIndex;
-    revGOTMap[addr] = idx;
-    DEBUG(dbgs() << "JIT: Adding GOT entry " << idx << " for addr ["
-                 << addr << "]\n");
-  }
-  return idx;
-}
-
-/// JITCompilerFn - This function is called when a lazy compilation stub has
-/// been entered.  It looks up which function this stub corresponds to, compiles
-/// it if necessary, then returns the resultant function pointer.
-void *JITResolver::JITCompilerFn(void *Stub) {
-  JITResolver *JR = StubToResolverMap->getResolverFromStub(Stub);
-  assert(JR && "Unable to find the corresponding JITResolver to the call site");
-
-  Function* F = nullptr;
-  void* ActualPtr = nullptr;
-
-  {
-    // Only lock for getting the Function. The call getPointerToFunction made
-    // in this function might trigger function materializing, which requires
-    // JIT lock to be unlocked.
-    MutexGuard locked(JR->TheJIT->lock);
-
-    // The address given to us for the stub may not be exactly right, it might
-    // be a little bit after the stub.  As such, use upper_bound to find it.
-    std::pair<void*, Function*> I =
-      JR->state.LookupFunctionFromCallSite(Stub);
-    F = I.second;
-    ActualPtr = I.first;
-  }
-
-  // If we have already code generated the function, just return the address.
-  void *Result = JR->TheJIT->getPointerToGlobalIfAvailable(F);
-
-  if (!Result) {
-    // Otherwise we don't have it, do lazy compilation now.
-
-    // If lazy compilation is disabled, emit a useful error message and abort.
-    if (!JR->TheJIT->isCompilingLazily()) {
-      report_fatal_error("LLVM JIT requested to do lazy compilation of"
-                         " function '"
-                        + F->getName() + "' when lazy compiles are disabled!");
-    }
-
-    DEBUG(dbgs() << "JIT: Lazily resolving function '" << F->getName()
-          << "' In stub ptr = " << Stub << " actual ptr = "
-          << ActualPtr << "\n");
-    (void)ActualPtr;
-
-    Result = JR->TheJIT->getPointerToFunction(F);
-  }
-
-  // Reacquire the lock to update the GOT map.
-  MutexGuard locked(JR->TheJIT->lock);
-
-  // We might like to remove the call site from the CallSiteToFunction map, but
-  // we can't do that! Multiple threads could be stuck, waiting to acquire the
-  // lock above. As soon as the 1st function finishes compiling the function,
-  // the next one will be released, and needs to be able to find the function it
-  // needs to call.
-
-  // FIXME: We could rewrite all references to this stub if we knew them.
-
-  // What we will do is set the compiled function address to map to the
-  // same GOT entry as the stub so that later clients may update the GOT
-  // if they see it still using the stub address.
-  // Note: this is done so the Resolver doesn't have to manage GOT memory
-  // Do this without allocating map space if the target isn't using a GOT
-  if(JR->revGOTMap.find(Stub) != JR->revGOTMap.end())
-    JR->revGOTMap[Result] = JR->revGOTMap[Stub];
-
-  return Result;
-}
-
-//===----------------------------------------------------------------------===//
-// JITEmitter code.
-//
-
-static GlobalObject *getSimpleAliasee(Constant *C) {
-  C = C->stripPointerCasts();
-  return dyn_cast<GlobalObject>(C);
-}
-
-void *JITEmitter::getPointerToGlobal(GlobalValue *V, void *Reference,
-                                     bool MayNeedFarStub) {
-  if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V))
-    return TheJIT->getOrEmitGlobalVariable(GV);
-
-  if (GlobalAlias *GA = dyn_cast<GlobalAlias>(V)) {
-    // We can only handle simple cases.
-    if (GlobalValue *GV = getSimpleAliasee(GA->getAliasee()))
-      return TheJIT->getPointerToGlobal(GV);
-    return nullptr;
-  }
-
-  // If we have already compiled the function, return a pointer to its body.
-  Function *F = cast<Function>(V);
-
-  void *FnStub = Resolver.getLazyFunctionStubIfAvailable(F);
-  if (FnStub) {
-    // Return the function stub if it's already created.  We do this first so
-    // that we're returning the same address for the function as any previous
-    // call.  TODO: Yes, this is wrong. The lazy stub isn't guaranteed to be
-    // close enough to call.
-    return FnStub;
-  }
-
-  // If we know the target can handle arbitrary-distance calls, try to
-  // return a direct pointer.
-  if (!MayNeedFarStub) {
-    // If we have code, go ahead and return that.
-    void *ResultPtr = TheJIT->getPointerToGlobalIfAvailable(F);
-    if (ResultPtr) return ResultPtr;
-
-    // If this is an external function pointer, we can force the JIT to
-    // 'compile' it, which really just adds it to the map.
-    if (isNonGhostDeclaration(F) || F->hasAvailableExternallyLinkage())
-      return TheJIT->getPointerToFunction(F);
-  }
-
-  // Otherwise, we may need a to emit a stub, and, conservatively, we always do
-  // so.  Note that it's possible to return null from getLazyFunctionStub in the
-  // case of a weak extern that fails to resolve.
-  return Resolver.getLazyFunctionStub(F);
-}
-
-void *JITEmitter::getPointerToGVIndirectSym(GlobalValue *V, void *Reference) {
-  // Make sure GV is emitted first, and create a stub containing the fully
-  // resolved address.
-  void *GVAddress = getPointerToGlobal(V, Reference, false);
-  void *StubAddr = Resolver.getGlobalValueIndirectSym(V, GVAddress);
-  return StubAddr;
-}
-
-void JITEmitter::processDebugLoc(DebugLoc DL, bool BeforePrintingInsn) {
-  if (DL.isUnknown()) return;
-  if (!BeforePrintingInsn) return;
-
-  const LLVMContext &Context = EmissionDetails.MF->getFunction()->getContext();
-
-  if (DL.getScope(Context) != nullptr && PrevDL != DL) {
-    JITEvent_EmittedFunctionDetails::LineStart NextLine;
-    NextLine.Address = getCurrentPCValue();
-    NextLine.Loc = DL;
-    EmissionDetails.LineStarts.push_back(NextLine);
-  }
-
-  PrevDL = DL;
-}
-
-static unsigned GetConstantPoolSizeInBytes(MachineConstantPool *MCP,
-                                           const DataLayout *TD) {
-  const std::vector<MachineConstantPoolEntry> &Constants = MCP->getConstants();
-  if (Constants.empty()) return 0;
-
-  unsigned Size = 0;
-  for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
-    MachineConstantPoolEntry CPE = Constants[i];
-    unsigned AlignMask = CPE.getAlignment() - 1;
-    Size = (Size + AlignMask) & ~AlignMask;
-    Type *Ty = CPE.getType();
-    Size += TD->getTypeAllocSize(Ty);
-  }
-  return Size;
-}
-
-void JITEmitter::startFunction(MachineFunction &F) {
-  DEBUG(dbgs() << "JIT: Starting CodeGen of Function "
-        << F.getName() << "\n");
-
-  uintptr_t ActualSize = 0;
-  // Set the memory writable, if it's not already
-  MemMgr->setMemoryWritable();
-
-  if (SizeEstimate > 0) {
-    // SizeEstimate will be non-zero on reallocation attempts.
-    ActualSize = SizeEstimate;
-  }
-
-  BufferBegin = CurBufferPtr = MemMgr->startFunctionBody(F.getFunction(),
-                                                         ActualSize);
-  BufferEnd = BufferBegin+ActualSize;
-  EmittedFunctions[F.getFunction()].FunctionBody = BufferBegin;
-
-  // Ensure the constant pool/jump table info is at least 4-byte aligned.
-  emitAlignment(16);
-
-  emitConstantPool(F.getConstantPool());
-  if (MachineJumpTableInfo *MJTI = F.getJumpTableInfo())
-    initJumpTableInfo(MJTI);
-
-  // About to start emitting the machine code for the function.
-  emitAlignment(std::max(F.getFunction()->getAlignment(), 8U));
-  TheJIT->updateGlobalMapping(F.getFunction(), CurBufferPtr);
-  EmittedFunctions[F.getFunction()].Code = CurBufferPtr;
-
-  MBBLocations.clear();
-
-  EmissionDetails.MF = &F;
-  EmissionDetails.LineStarts.clear();
-}
-
-bool JITEmitter::finishFunction(MachineFunction &F) {
-  if (CurBufferPtr == BufferEnd) {
-    // We must call endFunctionBody before retrying, because
-    // deallocateMemForFunction requires it.
-    MemMgr->endFunctionBody(F.getFunction(), BufferBegin, CurBufferPtr);
-    retryWithMoreMemory(F);
-    return true;
-  }
-
-  if (MachineJumpTableInfo *MJTI = F.getJumpTableInfo())
-    emitJumpTableInfo(MJTI);
-
-  // FnStart is the start of the text, not the start of the constant pool and
-  // other per-function data.
-  uint8_t *FnStart =
-    (uint8_t *)TheJIT->getPointerToGlobalIfAvailable(F.getFunction());
-
-  // FnEnd is the end of the function's machine code.
-  uint8_t *FnEnd = CurBufferPtr;
-
-  if (!Relocations.empty()) {
-    CurFn = F.getFunction();
-    NumRelos += Relocations.size();
-
-    // Resolve the relocations to concrete pointers.
-    for (unsigned i = 0, e = Relocations.size(); i != e; ++i) {
-      MachineRelocation &MR = Relocations[i];
-      void *ResultPtr = nullptr;
-      if (!MR.letTargetResolve()) {
-        if (MR.isExternalSymbol()) {
-          ResultPtr = TheJIT->getPointerToNamedFunction(MR.getExternalSymbol(),
-                                                        false);
-          DEBUG(dbgs() << "JIT: Map \'" << MR.getExternalSymbol() << "\' to ["
-                       << ResultPtr << "]\n");
-
-          // If the target REALLY wants a stub for this function, emit it now.
-          if (MR.mayNeedFarStub()) {
-            ResultPtr = Resolver.getExternalFunctionStub(ResultPtr);
-          }
-        } else if (MR.isGlobalValue()) {
-          ResultPtr = getPointerToGlobal(MR.getGlobalValue(),
-                                         BufferBegin+MR.getMachineCodeOffset(),
-                                         MR.mayNeedFarStub());
-        } else if (MR.isIndirectSymbol()) {
-          ResultPtr = getPointerToGVIndirectSym(
-              MR.getGlobalValue(), BufferBegin+MR.getMachineCodeOffset());
-        } else if (MR.isBasicBlock()) {
-          ResultPtr = (void*)getMachineBasicBlockAddress(MR.getBasicBlock());
-        } else if (MR.isConstantPoolIndex()) {
-          ResultPtr =
-            (void*)getConstantPoolEntryAddress(MR.getConstantPoolIndex());
-        } else {
-          assert(MR.isJumpTableIndex());
-          ResultPtr=(void*)getJumpTableEntryAddress(MR.getJumpTableIndex());
-        }
-
-        MR.setResultPointer(ResultPtr);
-      }
-
-      // if we are managing the GOT and the relocation wants an index,
-      // give it one
-      if (MR.isGOTRelative() && MemMgr->isManagingGOT()) {
-        unsigned idx = Resolver.getGOTIndexForAddr(ResultPtr);
-        MR.setGOTIndex(idx);
-        if (((void**)MemMgr->getGOTBase())[idx] != ResultPtr) {
-          DEBUG(dbgs() << "JIT: GOT was out of date for " << ResultPtr
-                       << " pointing at " << ((void**)MemMgr->getGOTBase())[idx]
-                       << "\n");
-          ((void**)MemMgr->getGOTBase())[idx] = ResultPtr;
-        }
-      }
-    }
-
-    CurFn = nullptr;
-    TheJIT->getJITInfo().relocate(BufferBegin, &Relocations[0],
-                                  Relocations.size(), MemMgr->getGOTBase());
-  }
-
-  // Update the GOT entry for F to point to the new code.
-  if (MemMgr->isManagingGOT()) {
-    unsigned idx = Resolver.getGOTIndexForAddr((void*)BufferBegin);
-    if (((void**)MemMgr->getGOTBase())[idx] != (void*)BufferBegin) {
-      DEBUG(dbgs() << "JIT: GOT was out of date for " << (void*)BufferBegin
-                   << " pointing at " << ((void**)MemMgr->getGOTBase())[idx]
-                   << "\n");
-      ((void**)MemMgr->getGOTBase())[idx] = (void*)BufferBegin;
-    }
-  }
-
-  // CurBufferPtr may have moved beyond FnEnd, due to memory allocation for
-  // global variables that were referenced in the relocations.
-  MemMgr->endFunctionBody(F.getFunction(), BufferBegin, CurBufferPtr);
-
-  if (CurBufferPtr == BufferEnd) {
-    retryWithMoreMemory(F);
-    return true;
-  } else {
-    // Now that we've succeeded in emitting the function, reset the
-    // SizeEstimate back down to zero.
-    SizeEstimate = 0;
-  }
-
-  BufferBegin = CurBufferPtr = nullptr;
-  NumBytes += FnEnd-FnStart;
-
-  // Invalidate the icache if necessary.
-  sys::Memory::InvalidateInstructionCache(FnStart, FnEnd-FnStart);
-
-  TheJIT->NotifyFunctionEmitted(*F.getFunction(), FnStart, FnEnd-FnStart,
-                                EmissionDetails);
-
-  // Reset the previous debug location.
-  PrevDL = DebugLoc();
-
-  DEBUG(dbgs() << "JIT: Finished CodeGen of [" << (void*)FnStart
-        << "] Function: " << F.getName()
-        << ": " << (FnEnd-FnStart) << " bytes of text, "
-        << Relocations.size() << " relocations\n");
-
-  Relocations.clear();
-  ConstPoolAddresses.clear();
-
-  // Mark code region readable and executable if it's not so already.
-  MemMgr->setMemoryExecutable();
-
-  DEBUG({
-        dbgs() << "JIT: Binary code:\n";
-        uint8_t* q = FnStart;
-        for (int i = 0; q < FnEnd; q += 4, ++i) {
-          if (i == 4)
-            i = 0;
-          if (i == 0)
-            dbgs() << "JIT: " << (long)(q - FnStart) << ": ";
-          bool Done = false;
-          for (int j = 3; j >= 0; --j) {
-            if (q + j >= FnEnd)
-              Done = true;
-            else
-              dbgs() << (unsigned short)q[j];
-          }
-          if (Done)
-            break;
-          dbgs() << ' ';
-          if (i == 3)
-            dbgs() << '\n';
-        }
-        dbgs()<< '\n';
-    });
-
-  if (MMI)
-    MMI->EndFunction();
-
-  return false;
-}
-
-void JITEmitter::retryWithMoreMemory(MachineFunction &F) {
-  DEBUG(dbgs() << "JIT: Ran out of space for native code.  Reattempting.\n");
-  Relocations.clear();  // Clear the old relocations or we'll reapply them.
-  ConstPoolAddresses.clear();
-  ++NumRetries;
-  deallocateMemForFunction(F.getFunction());
-  // Try again with at least twice as much free space.
-  SizeEstimate = (uintptr_t)(2 * (BufferEnd - BufferBegin));
-
-  for (MachineFunction::iterator MBB = F.begin(), E = F.end(); MBB != E; ++MBB){
-    if (MBB->hasAddressTaken())
-      TheJIT->clearPointerToBasicBlock(MBB->getBasicBlock());
-  }
-}
-
-/// deallocateMemForFunction - Deallocate all memory for the specified
-/// function body.  Also drop any references the function has to stubs.
-/// May be called while the Function is being destroyed inside ~Value().
-void JITEmitter::deallocateMemForFunction(const Function *F) {
-  ValueMap<const Function *, EmittedCode, EmittedFunctionConfig>::iterator
-    Emitted = EmittedFunctions.find(F);
-  if (Emitted != EmittedFunctions.end()) {
-    MemMgr->deallocateFunctionBody(Emitted->second.FunctionBody);
-    TheJIT->NotifyFreeingMachineCode(Emitted->second.Code);
-
-    EmittedFunctions.erase(Emitted);
-  }
-}
-
-
-void *JITEmitter::allocateSpace(uintptr_t Size, unsigned Alignment) {
-  if (BufferBegin)
-    return JITCodeEmitter::allocateSpace(Size, Alignment);
-
-  // create a new memory block if there is no active one.
-  // care must be taken so that BufferBegin is invalidated when a
-  // block is trimmed
-  BufferBegin = CurBufferPtr = MemMgr->allocateSpace(Size, Alignment);
-  BufferEnd = BufferBegin+Size;
-  return CurBufferPtr;
-}
-
-void *JITEmitter::allocateGlobal(uintptr_t Size, unsigned Alignment) {
-  // Delegate this call through the memory manager.
-  return MemMgr->allocateGlobal(Size, Alignment);
-}
-
-void JITEmitter::emitConstantPool(MachineConstantPool *MCP) {
-  if (TheJIT->getJITInfo().hasCustomConstantPool())
-    return;
-
-  const std::vector<MachineConstantPoolEntry> &Constants = MCP->getConstants();
-  if (Constants.empty()) return;
-
-  unsigned Size = GetConstantPoolSizeInBytes(MCP, TheJIT->getDataLayout());
-  unsigned Align = MCP->getConstantPoolAlignment();
-  ConstantPoolBase = allocateSpace(Size, Align);
-  ConstantPool = MCP;
-
-  if (!ConstantPoolBase) return;  // Buffer overflow.
-
-  DEBUG(dbgs() << "JIT: Emitted constant pool at [" << ConstantPoolBase
-               << "] (size: " << Size << ", alignment: " << Align << ")\n");
-
-  // Initialize the memory for all of the constant pool entries.
-  unsigned Offset = 0;
-  for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
-    MachineConstantPoolEntry CPE = Constants[i];
-    unsigned AlignMask = CPE.getAlignment() - 1;
-    Offset = (Offset + AlignMask) & ~AlignMask;
-
-    uintptr_t CAddr = (uintptr_t)ConstantPoolBase + Offset;
-    ConstPoolAddresses.push_back(CAddr);
-    if (CPE.isMachineConstantPoolEntry()) {
-      // FIXME: add support to lower machine constant pool values into bytes!
-      report_fatal_error("Initialize memory with machine specific constant pool"
-                        "entry has not been implemented!");
-    }
-    TheJIT->InitializeMemory(CPE.Val.ConstVal, (void*)CAddr);
-    DEBUG(dbgs() << "JIT:   CP" << i << " at [0x";
-          dbgs().write_hex(CAddr) << "]\n");
-
-    Type *Ty = CPE.Val.ConstVal->getType();
-    Offset += TheJIT->getDataLayout()->getTypeAllocSize(Ty);
-  }
-}
-
-void JITEmitter::initJumpTableInfo(MachineJumpTableInfo *MJTI) {
-  if (TheJIT->getJITInfo().hasCustomJumpTables())
-    return;
-  if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_Inline)
-    return;
-
-  const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
-  if (JT.empty()) return;
-
-  unsigned NumEntries = 0;
-  for (unsigned i = 0, e = JT.size(); i != e; ++i)
-    NumEntries += JT[i].MBBs.size();
-
-  unsigned EntrySize = MJTI->getEntrySize(*TheJIT->getDataLayout());
-
-  // Just allocate space for all the jump tables now.  We will fix up the actual
-  // MBB entries in the tables after we emit the code for each block, since then
-  // we will know the final locations of the MBBs in memory.
-  JumpTable = MJTI;
-  JumpTableBase = allocateSpace(NumEntries * EntrySize,
-                             MJTI->getEntryAlignment(*TheJIT->getDataLayout()));
-}
-
-void JITEmitter::emitJumpTableInfo(MachineJumpTableInfo *MJTI) {
-  if (TheJIT->getJITInfo().hasCustomJumpTables())
-    return;
-
-  const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
-  if (JT.empty() || !JumpTableBase) return;
-
-
-  switch (MJTI->getEntryKind()) {
-  case MachineJumpTableInfo::EK_Inline:
-    return;
-  case MachineJumpTableInfo::EK_BlockAddress: {
-    // EK_BlockAddress - Each entry is a plain address of block, e.g.:
-    //     .word LBB123
-    assert(MJTI->getEntrySize(*TheJIT->getDataLayout()) == sizeof(void*) &&
-           "Cross JIT'ing?");
-
-    // For each jump table, map each target in the jump table to the address of
-    // an emitted MachineBasicBlock.
-    intptr_t *SlotPtr = (intptr_t*)JumpTableBase;
-
-    for (unsigned i = 0, e = JT.size(); i != e; ++i) {
-      const std::vector<MachineBasicBlock*> &MBBs = JT[i].MBBs;
-      // Store the address of the basic block for this jump table slot in the
-      // memory we allocated for the jump table in 'initJumpTableInfo'
-      for (unsigned mi = 0, me = MBBs.size(); mi != me; ++mi)
-        *SlotPtr++ = getMachineBasicBlockAddress(MBBs[mi]);
-    }
-    break;
-  }
-
-  case MachineJumpTableInfo::EK_Custom32:
-  case MachineJumpTableInfo::EK_GPRel32BlockAddress:
-  case MachineJumpTableInfo::EK_LabelDifference32: {
-    assert(MJTI->getEntrySize(*TheJIT->getDataLayout()) == 4&&"Cross JIT'ing?");
-    // For each jump table, place the offset from the beginning of the table
-    // to the target address.
-    int *SlotPtr = (int*)JumpTableBase;
-
-    for (unsigned i = 0, e = JT.size(); i != e; ++i) {
-      const std::vector<MachineBasicBlock*> &MBBs = JT[i].MBBs;
-      // Store the offset of the basic block for this jump table slot in the
-      // memory we allocated for the jump table in 'initJumpTableInfo'
-      uintptr_t Base = (uintptr_t)SlotPtr;
-      for (unsigned mi = 0, me = MBBs.size(); mi != me; ++mi) {
-        uintptr_t MBBAddr = getMachineBasicBlockAddress(MBBs[mi]);
-        /// FIXME: USe EntryKind instead of magic "getPICJumpTableEntry" hook.
-        *SlotPtr++ = TheJIT->getJITInfo().getPICJumpTableEntry(MBBAddr, Base);
-      }
-    }
-    break;
-  }
-  case MachineJumpTableInfo::EK_GPRel64BlockAddress:
-    llvm_unreachable(
-           "JT Info emission not implemented for GPRel64BlockAddress yet.");
-  }
-}
-
-void JITEmitter::startGVStub(const GlobalValue* GV,
-                             unsigned StubSize, unsigned Alignment) {
-  SavedBufferBegin = BufferBegin;
-  SavedBufferEnd = BufferEnd;
-  SavedCurBufferPtr = CurBufferPtr;
-
-  BufferBegin = CurBufferPtr = MemMgr->allocateStub(GV, StubSize, Alignment);
-  BufferEnd = BufferBegin+StubSize+1;
-}
-
-void JITEmitter::startGVStub(void *Buffer, unsigned StubSize) {
-  SavedBufferBegin = BufferBegin;
-  SavedBufferEnd = BufferEnd;
-  SavedCurBufferPtr = CurBufferPtr;
-
-  BufferBegin = CurBufferPtr = (uint8_t *)Buffer;
-  BufferEnd = BufferBegin+StubSize+1;
-}
-
-void JITEmitter::finishGVStub() {
-  assert(CurBufferPtr != BufferEnd && "Stub overflowed allocated space.");
-  NumBytes += getCurrentPCOffset();
-  BufferBegin = SavedBufferBegin;
-  BufferEnd = SavedBufferEnd;
-  CurBufferPtr = SavedCurBufferPtr;
-}
-
-void *JITEmitter::allocIndirectGV(const GlobalValue *GV,
-                                  const uint8_t *Buffer, size_t Size,
-                                  unsigned Alignment) {
-  uint8_t *IndGV = MemMgr->allocateStub(GV, Size, Alignment);
-  memcpy(IndGV, Buffer, Size);
-  return IndGV;
-}
-
-// getConstantPoolEntryAddress - Return the address of the 'ConstantNum' entry
-// in the constant pool that was last emitted with the 'emitConstantPool'
-// method.
-//
-uintptr_t JITEmitter::getConstantPoolEntryAddress(unsigned ConstantNum) const {
-  assert(ConstantNum < ConstantPool->getConstants().size() &&
-         "Invalid ConstantPoolIndex!");
-  return ConstPoolAddresses[ConstantNum];
-}
-
-// getJumpTableEntryAddress - Return the address of the JumpTable with index
-// 'Index' in the jumpp table that was last initialized with 'initJumpTableInfo'
-//
-uintptr_t JITEmitter::getJumpTableEntryAddress(unsigned Index) const {
-  const std::vector<MachineJumpTableEntry> &JT = JumpTable->getJumpTables();
-  assert(Index < JT.size() && "Invalid jump table index!");
-
-  unsigned EntrySize = JumpTable->getEntrySize(*TheJIT->getDataLayout());
-
-  unsigned Offset = 0;
-  for (unsigned i = 0; i < Index; ++i)
-    Offset += JT[i].MBBs.size();
-
-   Offset *= EntrySize;
-
-  return (uintptr_t)((char *)JumpTableBase + Offset);
-}
-
-void JITEmitter::EmittedFunctionConfig::onDelete(
-  JITEmitter *Emitter, const Function *F) {
-  Emitter->deallocateMemForFunction(F);
-}
-void JITEmitter::EmittedFunctionConfig::onRAUW(
-  JITEmitter *, const Function*, const Function*) {
-  llvm_unreachable("The JIT doesn't know how to handle a"
-                   " RAUW on a value it has emitted.");
-}
-
-
-//===----------------------------------------------------------------------===//
-//  Public interface to this file
-//===----------------------------------------------------------------------===//
-
-JITCodeEmitter *JIT::createEmitter(JIT &jit, JITMemoryManager *JMM,
-                                   TargetMachine &tm) {
-  return new JITEmitter(jit, JMM, tm);
-}
-
-// getPointerToFunctionOrStub - If the specified function has been
-// code-gen'd, return a pointer to the function.  If not, compile it, or use
-// a stub to implement lazy compilation if available.
-//
-void *JIT::getPointerToFunctionOrStub(Function *F) {
-  // If we have already code generated the function, just return the address.
-  if (void *Addr = getPointerToGlobalIfAvailable(F))
-    return Addr;
-
-  // Get a stub if the target supports it.
-  JITEmitter *JE = static_cast<JITEmitter*>(getCodeEmitter());
-  return JE->getJITResolver().getLazyFunctionStub(F);
-}
-
-void JIT::updateFunctionStubUnlocked(Function *F) {
-  // Get the empty stub we generated earlier.
-  JITEmitter *JE = static_cast<JITEmitter*>(getCodeEmitter());
-  void *Stub = JE->getJITResolver().getLazyFunctionStub(F);
-  void *Addr = getPointerToGlobalIfAvailable(F);
-  assert(Addr != Stub && "Function must have non-stub address to be updated.");
-
-  // Tell the target jit info to rewrite the stub at the specified address,
-  // rather than creating a new one.
-  TargetJITInfo::StubLayout layout = getJITInfo().getStubLayout();
-  JE->startGVStub(Stub, layout.Size);
-  getJITInfo().emitFunctionStub(F, Addr, *getCodeEmitter());
-  JE->finishGVStub();
-}
-
-/// freeMachineCodeForFunction - release machine code memory for given Function.
-///
-void JIT::freeMachineCodeForFunction(Function *F) {
-  // Delete translation for this from the ExecutionEngine, so it will get
-  // retranslated next time it is used.
-  updateGlobalMapping(F, nullptr);
-
-  // Free the actual memory for the function body and related stuff.
-  static_cast<JITEmitter*>(JCE)->deallocateMemForFunction(F);
-}
diff --git a/llvm/lib/ExecutionEngine/JIT/LLVMBuild.txt b/llvm/lib/ExecutionEngine/JIT/LLVMBuild.txt
deleted file mode 100644
index dd22f1b464a..00000000000
--- a/llvm/lib/ExecutionEngine/JIT/LLVMBuild.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-;===- ./lib/ExecutionEngine/JIT/LLVMBuild.txt ------------------*- Conf -*--===;
-;
-;                     The LLVM Compiler Infrastructure
-;
-; This file is distributed under the University of Illinois Open Source
-; License. See LICENSE.TXT for details.
-;
-;===------------------------------------------------------------------------===;
-;
-; This is an LLVMBuild description file for the components in this subdirectory.
-;
-; For more information on the LLVMBuild system, please see:
-;
-;   http://llvm.org/docs/LLVMBuild.html
-;
-;===------------------------------------------------------------------------===;
-
-[component_0]
-type = Library
-name = JIT
-parent = ExecutionEngine
-required_libraries = CodeGen Core ExecutionEngine Support
diff --git a/llvm/lib/ExecutionEngine/JIT/Makefile b/llvm/lib/ExecutionEngine/JIT/Makefile
deleted file mode 100644
index aafa3d9d420..00000000000
--- a/llvm/lib/ExecutionEngine/JIT/Makefile
+++ /dev/null
@@ -1,38 +0,0 @@
-##===- lib/ExecutionEngine/JIT/Makefile --------------------*- Makefile -*-===##
-#
-#                     The LLVM Compiler Infrastructure
-#
-# This file is distributed under the University of Illinois Open Source
-# License. See LICENSE.TXT for details.
-#
-##===----------------------------------------------------------------------===##
-
-LEVEL = ../../..
-LIBRARYNAME = LLVMJIT
-
-# Get the $(ARCH) setting
-include $(LEVEL)/Makefile.config
-
-# Enable the X86 JIT if compiling on X86
-ifeq ($(ARCH), x86)
-  ENABLE_X86_JIT = 1
-endif
-
-# This flag can also be used on the command line to force inclusion
-# of the X86 JIT on non-X86 hosts
-ifdef ENABLE_X86_JIT
-  CPPFLAGS += -DENABLE_X86_JIT
-endif
-
-# Enable the Sparc JIT if compiling on Sparc
-ifeq ($(ARCH), Sparc)
-  ENABLE_SPARC_JIT = 1
-endif
-
-# This flag can also be used on the command line to force inclusion
-# of the Sparc JIT on non-Sparc hosts
-ifdef ENABLE_SPARC_JIT
-  CPPFLAGS += -DENABLE_SPARC_JIT
-endif
-
-include $(LEVEL)/Makefile.common
diff --git a/llvm/lib/ExecutionEngine/LLVMBuild.txt b/llvm/lib/ExecutionEngine/LLVMBuild.txt
index 6dc75af2ec9..ecae078ec7d 100644
--- a/llvm/lib/ExecutionEngine/LLVMBuild.txt
+++ b/llvm/lib/ExecutionEngine/LLVMBuild.txt
@@ -16,7 +16,7 @@
 ;===------------------------------------------------------------------------===;
 
 [common]
-subdirectories = Interpreter JIT MCJIT RuntimeDyld IntelJITEvents OProfileJIT
+subdirectories = Interpreter MCJIT RuntimeDyld IntelJITEvents OProfileJIT
 
 [component_0]
 type = Library
diff --git a/llvm/lib/ExecutionEngine/MCJIT/CMakeLists.txt b/llvm/lib/ExecutionEngine/MCJIT/CMakeLists.txt
index 088635a0e99..0f42c31060b 100644
--- a/llvm/lib/ExecutionEngine/MCJIT/CMakeLists.txt
+++ b/llvm/lib/ExecutionEngine/MCJIT/CMakeLists.txt
@@ -1,4 +1,5 @@
 add_llvm_library(LLVMMCJIT
+  JITMemoryManager.cpp
   MCJIT.cpp
   SectionMemoryManager.cpp
   )
diff --git a/llvm/lib/ExecutionEngine/JIT/JITMemoryManager.cpp b/llvm/lib/ExecutionEngine/MCJIT/JITMemoryManager.cpp
index 2cd78b5a33a..2cd78b5a33a 100644
--- a/llvm/lib/ExecutionEngine/JIT/JITMemoryManager.cpp
+++ b/llvm/lib/ExecutionEngine/MCJIT/JITMemoryManager.cpp
diff --git a/llvm/lib/ExecutionEngine/MCJIT/MCJIT.cpp b/llvm/lib/ExecutionEngine/MCJIT/MCJIT.cpp
index e7cc12d71eb..b114d487daa 100644
--- a/llvm/lib/ExecutionEngine/MCJIT/MCJIT.cpp
+++ b/llvm/lib/ExecutionEngine/MCJIT/MCJIT.cpp
@@ -253,10 +253,6 @@ void MCJIT::finalizeModule(Module *M) {
   finalizeLoadedModules();
 }
 
-void *MCJIT::getPointerToBasicBlock(BasicBlock *BB) {
-  report_fatal_error("not yet implemented");
-}
-
 uint64_t MCJIT::getExistingSymbolAddress(const std::string &Name) {
   Mangler Mang(TM->getSubtargetImpl()->getDataLayout());
   SmallString<128> FullName;
@@ -385,14 +381,6 @@ void *MCJIT::getPointerToFunction(Function *F) {
   return (void*)Dyld.getSymbolLoadAddress(Name);
 }
 
-void *MCJIT::recompileAndRelinkFunction(Function *F) {
-  report_fatal_error("not yet implemented");
-}
-
-void MCJIT::freeMachineCodeForFunction(Function *F) {
-  report_fatal_error("not yet implemented");
-}
-
 void MCJIT::runStaticConstructorsDestructorsInModulePtrSet(
     bool isDtors, ModulePtrSet::iterator I, ModulePtrSet::iterator E) {
   for (; I != E; ++I) {
@@ -562,8 +550,7 @@ void MCJIT::UnregisterJITEventListener(JITEventListener *L) {
   if (!L)
     return;
   MutexGuard locked(lock);
-  SmallVector<JITEventListener*, 2>::reverse_iterator I=
-      std::find(EventListeners.rbegin(), EventListeners.rend(), L);
+  auto I = std::find(EventListeners.rbegin(), EventListeners.rend(), L);
   if (I != EventListeners.rend()) {
     std::swap(*I, EventListeners.back());
     EventListeners.pop_back();
@@ -579,7 +566,8 @@ void MCJIT::NotifyObjectEmitted(const ObjectImage& Obj) {
 void MCJIT::NotifyFreeingObject(const ObjectImage& Obj) {
   MutexGuard locked(lock);
   for (unsigned I = 0, S = EventListeners.size(); I < S; ++I) {
-    EventListeners[I]->NotifyFreeingObject(Obj);
+    JITEventListener *L = EventListeners[I];
+    L->NotifyFreeingObject(Obj);
   }
 }
 
diff --git a/llvm/lib/ExecutionEngine/MCJIT/MCJIT.h b/llvm/lib/ExecutionEngine/MCJIT/MCJIT.h
index e90138473d5..be32716433a 100644
--- a/llvm/lib/ExecutionEngine/MCJIT/MCJIT.h
+++ b/llvm/lib/ExecutionEngine/MCJIT/MCJIT.h
@@ -212,7 +212,7 @@ class MCJIT : public ExecutionEngine {
   MCContext *Ctx;
   LinkingMemoryManager MemMgr;
   RuntimeDyld Dyld;
-  SmallVector<JITEventListener*, 2> EventListeners;
+  std::vector<JITEventListener*> EventListeners;
 
   OwningModuleContainer OwnedModules;
 
@@ -278,14 +278,8 @@ public:
   /// \param isDtors - Run the destructors instead of constructors.
   void runStaticConstructorsDestructors(bool isDtors) override;
 
-  void *getPointerToBasicBlock(BasicBlock *BB) override;
-
   void *getPointerToFunction(Function *F) override;
 
-  void *recompileAndRelinkFunction(Function *F) override;
-
-  void freeMachineCodeForFunction(Function *F) override;
-
   GenericValue runFunction(Function *F,
                            const std::vector<GenericValue> &ArgValues) override;
 
diff --git a/llvm/lib/ExecutionEngine/Makefile b/llvm/lib/ExecutionEngine/Makefile
index c26e0ada5bc..cf714324e3b 100644
--- a/llvm/lib/ExecutionEngine/Makefile
+++ b/llvm/lib/ExecutionEngine/Makefile
@@ -11,7 +11,7 @@ LIBRARYNAME = LLVMExecutionEngine
 
 include $(LEVEL)/Makefile.config
 
-PARALLEL_DIRS = Interpreter JIT MCJIT RuntimeDyld
+PARALLEL_DIRS = Interpreter MCJIT RuntimeDyld
 
 ifeq ($(USE_INTEL_JITEVENTS), 1)
 PARALLEL_DIRS += IntelJITEvents
diff --git a/llvm/lib/ExecutionEngine/TargetSelect.cpp b/llvm/lib/ExecutionEngine/TargetSelect.cpp
index b10d51f6486..e6679cfb7f7 100644
--- a/llvm/lib/ExecutionEngine/TargetSelect.cpp
+++ b/llvm/lib/ExecutionEngine/TargetSelect.cpp
@@ -30,7 +30,7 @@ TargetMachine *EngineBuilder::selectTarget() {
 
   // MCJIT can generate code for remote targets, but the old JIT and Interpreter
   // must use the host architecture.
-  if (UseMCJIT && WhichEngine != EngineKind::Interpreter && M)
+  if (WhichEngine != EngineKind::Interpreter && M)
     TT.setTriple(M->getTargetTriple());
 
   return selectTarget(TT, MArch, MCPU, MAttrs);
@@ -89,8 +89,7 @@ TargetMachine *EngineBuilder::selectTarget(const Triple &TargetTriple,
   }
 
   // FIXME: non-iOS ARM FastISel is broken with MCJIT.
-  if (UseMCJIT &&
-      TheTriple.getArch() == Triple::arm &&
+  if (TheTriple.getArch() == Triple::arm &&
       !TheTriple.isiOS() &&
       OptLevel == CodeGenOpt::None) {
     OptLevel = CodeGenOpt::Less;