Merge "Update prebuilt Clang to r353983." into p9.0HEADp9.0-backupp9.0

1 files changed, 666 insertions, 0 deletions

diff --git a/clang-r353983/include/llvm/ExecutionEngine/ExecutionEngine.h b/clang-r353983/include/llvm/ExecutionEngine/ExecutionEngine.h
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+++ b/clang-r353983/include/llvm/ExecutionEngine/ExecutionEngine.h
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+//===- ExecutionEngine.h - Abstract Execution Engine Interface --*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the abstract interface that implements execution support
+// for LLVM.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_EXECUTIONENGINE_EXECUTIONENGINE_H
+#define LLVM_EXECUTIONENGINE_EXECUTIONENGINE_H
+
+#include "llvm-c/ExecutionEngine.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/Optional.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ExecutionEngine/JITSymbol.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/Module.h"
+#include "llvm/Object/Binary.h"
+#include "llvm/Support/CBindingWrapping.h"
+#include "llvm/Support/CodeGen.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/Mutex.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetOptions.h"
+#include <algorithm>
+#include <cstdint>
+#include <functional>
+#include <map>
+#include <memory>
+#include <string>
+#include <vector>
+
+namespace llvm {
+
+class Constant;
+class Function;
+struct GenericValue;
+class GlobalValue;
+class GlobalVariable;
+class JITEventListener;
+class MCJITMemoryManager;
+class ObjectCache;
+class RTDyldMemoryManager;
+class Triple;
+class Type;
+
+namespace object {
+
+class Archive;
+class ObjectFile;
+
+} // end namespace object
+
+/// Helper class for helping synchronize access to the global address map
+/// table.  Access to this class should be serialized under a mutex.
+class ExecutionEngineState {
+public:
+  using GlobalAddressMapTy = StringMap<uint64_t>;
+
+private:
+  /// GlobalAddressMap - A mapping between LLVM global symbol names values and
+  /// their actualized version...
+  GlobalAddressMapTy GlobalAddressMap;
+
+  /// GlobalAddressReverseMap - This is the reverse mapping of GlobalAddressMap,
+  /// used to convert raw addresses into the LLVM global value that is emitted
+  /// at the address.  This map is not computed unless getGlobalValueAtAddress
+  /// is called at some point.
+  std::map<uint64_t, std::string> GlobalAddressReverseMap;
+
+public:
+  GlobalAddressMapTy &getGlobalAddressMap() {
+    return GlobalAddressMap;
+  }
+
+  std::map<uint64_t, std::string> &getGlobalAddressReverseMap() {
+    return GlobalAddressReverseMap;
+  }
+
+  /// Erase an entry from the mapping table.
+  ///
+  /// \returns The address that \p ToUnmap was happed to.
+  uint64_t RemoveMapping(StringRef Name);
+};
+
+using FunctionCreator = std::function<void *(const std::string &)>;
+
+/// Abstract interface for implementation execution of LLVM modules,
+/// designed to support both interpreter and just-in-time (JIT) compiler
+/// implementations.
+class ExecutionEngine {
+  /// The state object holding the global address mapping, which must be
+  /// accessed synchronously.
+  //
+  // FIXME: There is no particular need the entire map needs to be
+  // synchronized.  Wouldn't a reader-writer design be better here?
+  ExecutionEngineState EEState;
+
+  /// The target data for the platform for which execution is being performed.
+  ///
+  /// Note: the DataLayout is LLVMContext specific because it has an
+  /// internal cache based on type pointers. It makes unsafe to reuse the
+  /// ExecutionEngine across context, we don't enforce this rule but undefined
+  /// behavior can occurs if the user tries to do it.
+  const DataLayout DL;
+
+  /// Whether lazy JIT compilation is enabled.
+  bool CompilingLazily;
+
+  /// Whether JIT compilation of external global variables is allowed.
+  bool GVCompilationDisabled;
+
+  /// Whether the JIT should perform lookups of external symbols (e.g.,
+  /// using dlsym).
+  bool SymbolSearchingDisabled;
+
+  /// Whether the JIT should verify IR modules during compilation.
+  bool VerifyModules;
+
+  friend class EngineBuilder;  // To allow access to JITCtor and InterpCtor.
+
+protected:
+  /// The list of Modules that we are JIT'ing from.  We use a SmallVector to
+  /// optimize for the case where there is only one module.
+  SmallVector<std::unique_ptr<Module>, 1> Modules;
+
+  /// getMemoryforGV - Allocate memory for a global variable.
+  virtual char *getMemoryForGV(const GlobalVariable *GV);
+
+  static ExecutionEngine *(*MCJITCtor)(
+      std::unique_ptr<Module> M, std::string *ErrorStr,
+      std::shared_ptr<MCJITMemoryManager> MM,
+      std::shared_ptr<LegacyJITSymbolResolver> SR,
+      std::unique_ptr<TargetMachine> TM);
+
+  static ExecutionEngine *(*OrcMCJITReplacementCtor)(
+      std::string *ErrorStr, std::shared_ptr<MCJITMemoryManager> MM,
+      std::shared_ptr<LegacyJITSymbolResolver> SR,
+      std::unique_ptr<TargetMachine> TM);
+
+  static ExecutionEngine *(*InterpCtor)(std::unique_ptr<Module> M,
+                                        std::string *ErrorStr);
+
+  /// LazyFunctionCreator - If an unknown function is needed, this function
+  /// pointer is invoked to create it.  If this returns null, the JIT will
+  /// abort.
+  FunctionCreator LazyFunctionCreator;
+
+  /// getMangledName - Get mangled name.
+  std::string getMangledName(const GlobalValue *GV);
+
+public:
+  /// lock - This lock protects the ExecutionEngine and MCJIT classes. It must
+  /// be held while changing the internal state of any of those classes.
+  sys::Mutex lock;
+
+  //===--------------------------------------------------------------------===//
+  //  ExecutionEngine Startup
+  //===--------------------------------------------------------------------===//
+
+  virtual ~ExecutionEngine();
+
+  /// Add a Module to the list of modules that we can JIT from.
+  virtual void addModule(std::unique_ptr<Module> M) {
+    Modules.push_back(std::move(M));
+  }
+
+  /// addObjectFile - Add an ObjectFile to the execution engine.
+  ///
+  /// This method is only supported by MCJIT.  MCJIT will immediately load the
+  /// object into memory and adds its symbols to the list used to resolve
+  /// external symbols while preparing other objects for execution.
+  ///
+  /// Objects added using this function will not be made executable until
+  /// needed by another object.
+  ///
+  /// MCJIT will take ownership of the ObjectFile.
+  virtual void addObjectFile(std::unique_ptr<object::ObjectFile> O);
+  virtual void addObjectFile(object::OwningBinary<object::ObjectFile> O);
+
+  /// addArchive - Add an Archive to the execution engine.
+  ///
+  /// This method is only supported by MCJIT.  MCJIT will use the archive to
+  /// resolve external symbols in objects it is loading.  If a symbol is found
+  /// in the Archive the contained object file will be extracted (in memory)
+  /// and loaded for possible execution.
+  virtual void addArchive(object::OwningBinary<object::Archive> A);
+
+  //===--------------------------------------------------------------------===//
+
+  const DataLayout &getDataLayout() const { return DL; }
+
+  /// removeModule - Removes a Module from the list of modules, but does not
+  /// free the module's memory. Returns true if M is found, in which case the
+  /// caller assumes responsibility for deleting the module.
+  //
+  // FIXME: This stealth ownership transfer is horrible. This will probably be
+  //        fixed by deleting ExecutionEngine.
+  virtual bool removeModule(Module *M);
+
+  /// FindFunctionNamed - Search all of the active modules to find the function that
+  /// defines FnName.  This is very slow operation and shouldn't be used for
+  /// general code.
+  virtual Function *FindFunctionNamed(StringRef FnName);
+
+  /// FindGlobalVariableNamed - Search all of the active modules to find the global variable
+  /// that defines Name.  This is very slow operation and shouldn't be used for
+  /// general code.
+  virtual GlobalVariable *FindGlobalVariableNamed(StringRef Name, bool AllowInternal = false);
+
+  /// runFunction - Execute the specified function with the specified arguments,
+  /// and return the result.
+  ///
+  /// For MCJIT execution engines, clients are encouraged to use the
+  /// "GetFunctionAddress" method (rather than runFunction) and cast the
+  /// returned uint64_t to the desired function pointer type. However, for
+  /// backwards compatibility MCJIT's implementation can execute 'main-like'
+  /// function (i.e. those returning void or int, and taking either no
+  /// arguments or (int, char*[])).
+  virtual GenericValue runFunction(Function *F,
+                                   ArrayRef<GenericValue> ArgValues) = 0;
+
+  /// getPointerToNamedFunction - This method returns the address of the
+  /// specified function by using the dlsym function call.  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.
+  ///
+  /// This function is deprecated for the MCJIT execution engine.
+  virtual void *getPointerToNamedFunction(StringRef Name,
+                                          bool AbortOnFailure = true) = 0;
+
+  /// mapSectionAddress - map a section to its target address space value.
+  /// Map the address of a JIT section as returned from the memory manager
+  /// to the address in the target process as the running code will see it.
+  /// This is the address which will be used for relocation resolution.
+  virtual void mapSectionAddress(const void *LocalAddress,
+                                 uint64_t TargetAddress) {
+    llvm_unreachable("Re-mapping of section addresses not supported with this "
+                     "EE!");
+  }
+
+  /// generateCodeForModule - Run code generation for the specified module and
+  /// load it into memory.
+  ///
+  /// When this function has completed, all code and data for the specified
+  /// module, and any module on which this module depends, will be generated
+  /// and loaded into memory, but relocations will not yet have been applied
+  /// and all memory will be readable and writable but not executable.
+  ///
+  /// This function is primarily useful when generating code for an external
+  /// target, allowing the client an opportunity to remap section addresses
+  /// before relocations are applied.  Clients that intend to execute code
+  /// locally can use the getFunctionAddress call, which will generate code
+  /// and apply final preparations all in one step.
+  ///
+  /// This method has no effect for the interpeter.
+  virtual void generateCodeForModule(Module *M) {}
+
+  /// finalizeObject - ensure the module is fully processed and is usable.
+  ///
+  /// It is the user-level function for completing the process of making the
+  /// object usable for execution.  It should be called after sections within an
+  /// object have been relocated using mapSectionAddress.  When this method is
+  /// called the MCJIT execution engine will reapply relocations for a loaded
+  /// object.  This method has no effect for the interpeter.
+  virtual void finalizeObject() {}
+
+  /// runStaticConstructorsDestructors - This method is used to execute all of
+  /// the static constructors or destructors for a program.
+  ///
+  /// \param isDtors - Run the destructors instead of constructors.
+  virtual void runStaticConstructorsDestructors(bool isDtors);
+
+  /// This method is used to execute all of the static constructors or
+  /// destructors for a particular module.
+  ///
+  /// \param isDtors - Run the destructors instead of constructors.
+  void runStaticConstructorsDestructors(Module &module, bool isDtors);
+
+
+  /// runFunctionAsMain - This is a helper function which wraps runFunction to
+  /// handle the common task of starting up main with the specified argc, argv,
+  /// and envp parameters.
+  int runFunctionAsMain(Function *Fn, const std::vector<std::string> &argv,
+                        const char * const * envp);
+
+
+  /// addGlobalMapping - Tell the execution engine that the specified global is
+  /// at the specified location.  This is used internally as functions are JIT'd
+  /// and as global variables are laid out in memory.  It can and should also be
+  /// used by clients of the EE that want to have an LLVM global overlay
+  /// existing data in memory. Values to be mapped should be named, and have
+  /// external or weak linkage. Mappings are automatically removed when their
+  /// GlobalValue is destroyed.
+  void addGlobalMapping(const GlobalValue *GV, void *Addr);
+  void addGlobalMapping(StringRef Name, uint64_t Addr);
+
+  /// clearAllGlobalMappings - Clear all global mappings and start over again,
+  /// for use in dynamic compilation scenarios to move globals.
+  void clearAllGlobalMappings();
+
+  /// clearGlobalMappingsFromModule - Clear all global mappings that came from a
+  /// particular module, because it has been removed from the JIT.
+  void clearGlobalMappingsFromModule(Module *M);
+
+  /// updateGlobalMapping - Replace an existing mapping for GV with a new
+  /// address.  This updates both maps as required.  If "Addr" is null, the
+  /// entry for the global is removed from the mappings.  This returns the old
+  /// value of the pointer, or null if it was not in the map.
+  uint64_t updateGlobalMapping(const GlobalValue *GV, void *Addr);
+  uint64_t updateGlobalMapping(StringRef Name, uint64_t Addr);
+
+  /// getAddressToGlobalIfAvailable - This returns the address of the specified
+  /// global symbol.
+  uint64_t getAddressToGlobalIfAvailable(StringRef S);
+
+  /// getPointerToGlobalIfAvailable - This returns the address of the specified
+  /// global value if it is has already been codegen'd, otherwise it returns
+  /// null.
+  void *getPointerToGlobalIfAvailable(StringRef S);
+  void *getPointerToGlobalIfAvailable(const GlobalValue *GV);
+
+  /// getPointerToGlobal - This returns the address of the specified global
+  /// value. This may involve code generation if it's a function.
+  ///
+  /// This function is deprecated for the MCJIT execution engine.  Use
+  /// getGlobalValueAddress instead.
+  void *getPointerToGlobal(const GlobalValue *GV);
+
+  /// getPointerToFunction - The different EE's represent function bodies in
+  /// different ways.  They should each implement this to say what a function
+  /// pointer should look like.  When F is destroyed, the ExecutionEngine will
+  /// remove its global mapping and free any machine code.  Be sure no threads
+  /// are running inside F when that happens.
+  ///
+  /// This function is deprecated for the MCJIT execution engine.  Use
+  /// getFunctionAddress instead.
+  virtual void *getPointerToFunction(Function *F) = 0;
+
+  /// 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.  See
+  /// getPointerToFunction for the requirements on destroying F.
+  ///
+  /// This function is deprecated for the MCJIT execution engine.  Use
+  /// getFunctionAddress instead.
+  virtual void *getPointerToFunctionOrStub(Function *F) {
+    // Default implementation, just codegen the function.
+    return getPointerToFunction(F);
+  }
+
+  /// getGlobalValueAddress - Return the address of the specified global
+  /// value. This may involve code generation.
+  ///
+  /// This function should not be called with the interpreter engine.
+  virtual uint64_t getGlobalValueAddress(const std::string &Name) {
+    // Default implementation for the interpreter.  MCJIT will override this.
+    // JIT and interpreter clients should use getPointerToGlobal instead.
+    return 0;
+  }
+
+  /// getFunctionAddress - Return the address of the specified function.
+  /// This may involve code generation.
+  virtual uint64_t getFunctionAddress(const std::string &Name) {
+    // Default implementation for the interpreter.  MCJIT will override this.
+    // Interpreter clients should use getPointerToFunction instead.
+    return 0;
+  }
+
+  /// getGlobalValueAtAddress - Return the LLVM global value object that starts
+  /// at the specified address.
+  ///
+  const GlobalValue *getGlobalValueAtAddress(void *Addr);
+
+  /// StoreValueToMemory - Stores the data in Val of type Ty at address Ptr.
+  /// Ptr is the address of the memory at which to store Val, cast to
+  /// GenericValue *.  It is not a pointer to a GenericValue containing the
+  /// address at which to store Val.
+  void StoreValueToMemory(const GenericValue &Val, GenericValue *Ptr,
+                          Type *Ty);
+
+  void InitializeMemory(const Constant *Init, void *Addr);
+
+  /// getOrEmitGlobalVariable - Return the address of the specified global
+  /// variable, possibly emitting it to memory if needed.  This is used by the
+  /// Emitter.
+  ///
+  /// This function is deprecated for the MCJIT execution engine.  Use
+  /// getGlobalValueAddress instead.
+  virtual void *getOrEmitGlobalVariable(const GlobalVariable *GV) {
+    return getPointerToGlobal((const GlobalValue *)GV);
+  }
+
+  /// Registers a listener to be called back on various events within
+  /// the JIT.  See JITEventListener.h for more details.  Does not
+  /// take ownership of the argument.  The argument may be NULL, in
+  /// which case these functions do nothing.
+  virtual void RegisterJITEventListener(JITEventListener *) {}
+  virtual void UnregisterJITEventListener(JITEventListener *) {}
+
+  /// Sets the pre-compiled object cache.  The ownership of the ObjectCache is
+  /// not changed.  Supported by MCJIT but not the interpreter.
+  virtual void setObjectCache(ObjectCache *) {
+    llvm_unreachable("No support for an object cache");
+  }
+
+  /// setProcessAllSections (MCJIT Only): By default, only sections that are
+  /// "required for execution" are passed to the RTDyldMemoryManager, and other
+  /// sections are discarded. Passing 'true' to this method will cause
+  /// RuntimeDyld to pass all sections to its RTDyldMemoryManager regardless
+  /// of whether they are "required to execute" in the usual sense.
+  ///
+  /// Rationale: Some MCJIT clients want to be able to inspect metadata
+  /// sections (e.g. Dwarf, Stack-maps) to enable functionality or analyze
+  /// performance. Passing these sections to the memory manager allows the
+  /// client to make policy about the relevant sections, rather than having
+  /// MCJIT do it.
+  virtual void setProcessAllSections(bool ProcessAllSections) {
+    llvm_unreachable("No support for ProcessAllSections option");
+  }
+
+  /// Return the target machine (if available).
+  virtual TargetMachine *getTargetMachine() { return nullptr; }
+
+  /// DisableLazyCompilation - When lazy compilation is off (the default), the
+  /// JIT will eagerly compile every function reachable from the argument to
+  /// getPointerToFunction.  If lazy compilation is turned on, the JIT will only
+  /// compile the one function and emit stubs to compile the rest when they're
+  /// first called.  If lazy compilation is turned off again while some lazy
+  /// stubs are still around, and one of those stubs is called, the program will
+  /// abort.
+  ///
+  /// In order to safely compile lazily in a threaded program, the user must
+  /// ensure that 1) only one thread at a time can call any particular lazy
+  /// stub, and 2) any thread modifying LLVM IR must hold the JIT's lock
+  /// (ExecutionEngine::lock) or otherwise ensure that no other thread calls a
+  /// lazy stub.  See http://llvm.org/PR5184 for details.
+  void DisableLazyCompilation(bool Disabled = true) {
+    CompilingLazily = !Disabled;
+  }
+  bool isCompilingLazily() const {
+    return CompilingLazily;
+  }
+
+  /// DisableGVCompilation - If called, the JIT will abort if it's asked to
+  /// allocate space and populate a GlobalVariable that is not internal to
+  /// the module.
+  void DisableGVCompilation(bool Disabled = true) {
+    GVCompilationDisabled = Disabled;
+  }
+  bool isGVCompilationDisabled() const {
+    return GVCompilationDisabled;
+  }
+
+  /// DisableSymbolSearching - If called, the JIT will not try to lookup unknown
+  /// symbols with dlsym.  A client can still use InstallLazyFunctionCreator to
+  /// resolve symbols in a custom way.
+  void DisableSymbolSearching(bool Disabled = true) {
+    SymbolSearchingDisabled = Disabled;
+  }
+  bool isSymbolSearchingDisabled() const {
+    return SymbolSearchingDisabled;
+  }
+
+  /// Enable/Disable IR module verification.
+  ///
+  /// Note: Module verification is enabled by default in Debug builds, and
+  /// disabled by default in Release. Use this method to override the default.
+  void setVerifyModules(bool Verify) {
+    VerifyModules = Verify;
+  }
+  bool getVerifyModules() const {
+    return VerifyModules;
+  }
+
+  /// InstallLazyFunctionCreator - If an unknown function is needed, the
+  /// specified function pointer is invoked to create it.  If it returns null,
+  /// the JIT will abort.
+  void InstallLazyFunctionCreator(FunctionCreator C) {
+    LazyFunctionCreator = std::move(C);
+  }
+
+protected:
+  ExecutionEngine(DataLayout DL) : DL(std::move(DL)) {}
+  explicit ExecutionEngine(DataLayout DL, std::unique_ptr<Module> M);
+  explicit ExecutionEngine(std::unique_ptr<Module> M);
+
+  void emitGlobals();
+
+  void EmitGlobalVariable(const GlobalVariable *GV);
+
+  GenericValue getConstantValue(const Constant *C);
+  void LoadValueFromMemory(GenericValue &Result, GenericValue *Ptr,
+                           Type *Ty);
+
+private:
+  void Init(std::unique_ptr<Module> M);
+};
+
+namespace EngineKind {
+
+  // These are actually bitmasks that get or-ed together.
+  enum Kind {
+    JIT         = 0x1,
+    Interpreter = 0x2
+  };
+  const static Kind Either = (Kind)(JIT | Interpreter);
+
+} // end namespace EngineKind
+
+/// Builder class for ExecutionEngines. Use this by stack-allocating a builder,
+/// chaining the various set* methods, and terminating it with a .create()
+/// call.
+class EngineBuilder {
+private:
+  std::unique_ptr<Module> M;
+  EngineKind::Kind WhichEngine;
+  std::string *ErrorStr;
+  CodeGenOpt::Level OptLevel;
+  std::shared_ptr<MCJITMemoryManager> MemMgr;
+  std::shared_ptr<LegacyJITSymbolResolver> Resolver;
+  TargetOptions Options;
+  Optional<Reloc::Model> RelocModel;
+  Optional<CodeModel::Model> CMModel;
+  std::string MArch;
+  std::string MCPU;
+  SmallVector<std::string, 4> MAttrs;
+  bool VerifyModules;
+  bool UseOrcMCJITReplacement;
+  bool EmulatedTLS = true;
+
+public:
+  /// Default constructor for EngineBuilder.
+  EngineBuilder();
+
+  /// Constructor for EngineBuilder.
+  EngineBuilder(std::unique_ptr<Module> M);
+
+  // Out-of-line since we don't have the def'n of RTDyldMemoryManager here.
+  ~EngineBuilder();
+
+  /// setEngineKind - Controls whether the user wants the interpreter, the JIT,
+  /// or whichever engine works.  This option defaults to EngineKind::Either.
+  EngineBuilder &setEngineKind(EngineKind::Kind w) {
+    WhichEngine = w;
+    return *this;
+  }
+
+  /// setMCJITMemoryManager - Sets the MCJIT memory manager to use. This allows
+  /// clients to customize their memory allocation policies for the MCJIT. This
+  /// is only appropriate for the MCJIT; setting this and configuring the builder
+  /// to create anything other than MCJIT will cause a runtime error. If create()
+  /// is called and is successful, the created engine takes ownership of the
+  /// memory manager. This option defaults to NULL.
+  EngineBuilder &setMCJITMemoryManager(std::unique_ptr<RTDyldMemoryManager> mcjmm);
+
+  EngineBuilder&
+  setMemoryManager(std::unique_ptr<MCJITMemoryManager> MM);
+
+  EngineBuilder &setSymbolResolver(std::unique_ptr<LegacyJITSymbolResolver> SR);
+
+  /// setErrorStr - Set the error string to write to on error.  This option
+  /// defaults to NULL.
+  EngineBuilder &setErrorStr(std::string *e) {
+    ErrorStr = e;
+    return *this;
+  }
+
+  /// setOptLevel - Set the optimization level for the JIT.  This option
+  /// defaults to CodeGenOpt::Default.
+  EngineBuilder &setOptLevel(CodeGenOpt::Level l) {
+    OptLevel = l;
+    return *this;
+  }
+
+  /// setTargetOptions - Set the target options that the ExecutionEngine
+  /// target is using. Defaults to TargetOptions().
+  EngineBuilder &setTargetOptions(const TargetOptions &Opts) {
+    Options = Opts;
+    return *this;
+  }
+
+  /// setRelocationModel - Set the relocation model that the ExecutionEngine
+  /// target is using. Defaults to target specific default "Reloc::Default".
+  EngineBuilder &setRelocationModel(Reloc::Model RM) {
+    RelocModel = RM;
+    return *this;
+  }
+
+  /// setCodeModel - Set the CodeModel that the ExecutionEngine target
+  /// data is using. Defaults to target specific default
+  /// "CodeModel::JITDefault".
+  EngineBuilder &setCodeModel(CodeModel::Model M) {
+    CMModel = M;
+    return *this;
+  }
+
+  /// setMArch - Override the architecture set by the Module's triple.
+  EngineBuilder &setMArch(StringRef march) {
+    MArch.assign(march.begin(), march.end());
+    return *this;
+  }
+
+  /// setMCPU - Target a specific cpu type.
+  EngineBuilder &setMCPU(StringRef mcpu) {
+    MCPU.assign(mcpu.begin(), mcpu.end());
+    return *this;
+  }
+
+  /// setVerifyModules - Set whether the JIT implementation should verify
+  /// IR modules during compilation.
+  EngineBuilder &setVerifyModules(bool Verify) {
+    VerifyModules = Verify;
+    return *this;
+  }
+
+  /// setMAttrs - Set cpu-specific attributes.
+  template<typename StringSequence>
+  EngineBuilder &setMAttrs(const StringSequence &mattrs) {
+    MAttrs.clear();
+    MAttrs.append(mattrs.begin(), mattrs.end());
+    return *this;
+  }
+
+  // Use OrcMCJITReplacement instead of MCJIT. Off by default.
+  void setUseOrcMCJITReplacement(bool UseOrcMCJITReplacement) {
+    this->UseOrcMCJITReplacement = UseOrcMCJITReplacement;
+  }
+
+  void setEmulatedTLS(bool EmulatedTLS) {
+    this->EmulatedTLS = EmulatedTLS;
+  }
+
+  TargetMachine *selectTarget();
+
+  /// selectTarget - Pick a target either via -march or by guessing the native
+  /// arch.  Add any CPU features specified via -mcpu or -mattr.
+  TargetMachine *selectTarget(const Triple &TargetTriple,
+                              StringRef MArch,
+                              StringRef MCPU,
+                              const SmallVectorImpl<std::string>& MAttrs);
+
+  ExecutionEngine *create() {
+    return create(selectTarget());
+  }
+
+  ExecutionEngine *create(TargetMachine *TM);
+};
+
+// Create wrappers for C Binding types (see CBindingWrapping.h).
+DEFINE_SIMPLE_CONVERSION_FUNCTIONS(ExecutionEngine, LLVMExecutionEngineRef)
+
+} // end namespace llvm
+
+#endif // LLVM_EXECUTIONENGINE_EXECUTIONENGINE_H