third_party/llvm-7.0/llvm/lib/ExecutionEngine/ExecutionEngineBindings.cpp - SwiftShader - Git at Google

 //===-- ExecutionEngineBindings.cpp - C bindings for EEs ------------------===//
 //
 //                     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 C bindings for the ExecutionEngine library.
 //
 //===----------------------------------------------------------------------===//

 #include "llvm-c/ExecutionEngine.h"
 #include "llvm/ExecutionEngine/ExecutionEngine.h"
 #include "llvm/ExecutionEngine/GenericValue.h"
 #include "llvm/ExecutionEngine/JITEventListener.h"
 #include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
 #include "llvm/IR/DerivedTypes.h"
 #include "llvm/IR/Module.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Target/CodeGenCWrappers.h"
 #include "llvm/Target/TargetOptions.h"
 #include <cstring>

 using namespace llvm;

 #define DEBUG_TYPE "jit"

 // Wrapping the C bindings types.
 DEFINE_SIMPLE_CONVERSION_FUNCTIONS(GenericValue, LLVMGenericValueRef)


 static LLVMTargetMachineRef wrap(const TargetMachine *P) {
   return
   reinterpret_cast<LLVMTargetMachineRef>(const_cast<TargetMachine*>(P));
 }

 /*===-- Operations on generic values --------------------------------------===*/

 LLVMGenericValueRef LLVMCreateGenericValueOfInt(LLVMTypeRef Ty,
                                                 unsigned long long N,
                                                 LLVMBool IsSigned) {
   GenericValue *GenVal = new GenericValue();
   GenVal->IntVal = APInt(unwrap<IntegerType>(Ty)->getBitWidth(), N, IsSigned);
   return wrap(GenVal);
 }

 LLVMGenericValueRef LLVMCreateGenericValueOfPointer(void *P) {
   GenericValue *GenVal = new GenericValue();
   GenVal->PointerVal = P;
   return wrap(GenVal);
 }

 LLVMGenericValueRef LLVMCreateGenericValueOfFloat(LLVMTypeRef TyRef, double N) {
   GenericValue *GenVal = new GenericValue();
   switch (unwrap(TyRef)->getTypeID()) {
   case Type::FloatTyID:
     GenVal->FloatVal = N;
     break;
   case Type::DoubleTyID:
     GenVal->DoubleVal = N;
     break;
   default:
     llvm_unreachable("LLVMGenericValueToFloat supports only float and double.");
   }
   return wrap(GenVal);
 }

 unsigned LLVMGenericValueIntWidth(LLVMGenericValueRef GenValRef) {
   return unwrap(GenValRef)->IntVal.getBitWidth();
 }

 unsigned long long LLVMGenericValueToInt(LLVMGenericValueRef GenValRef,
                                          LLVMBool IsSigned) {
   GenericValue *GenVal = unwrap(GenValRef);
   if (IsSigned)
     return GenVal->IntVal.getSExtValue();
   else
     return GenVal->IntVal.getZExtValue();
 }

 void *LLVMGenericValueToPointer(LLVMGenericValueRef GenVal) {
   return unwrap(GenVal)->PointerVal;
 }

 double LLVMGenericValueToFloat(LLVMTypeRef TyRef, LLVMGenericValueRef GenVal) {
   switch (unwrap(TyRef)->getTypeID()) {
   case Type::FloatTyID:
     return unwrap(GenVal)->FloatVal;
   case Type::DoubleTyID:
     return unwrap(GenVal)->DoubleVal;
   default:
     llvm_unreachable("LLVMGenericValueToFloat supports only float and double.");
   }
 }

 void LLVMDisposeGenericValue(LLVMGenericValueRef GenVal) {
   delete unwrap(GenVal);
 }

 /*===-- Operations on execution engines -----------------------------------===*/

 LLVMBool LLVMCreateExecutionEngineForModule(LLVMExecutionEngineRef *OutEE,
                                             LLVMModuleRef M,
                                             char **OutError) {
   std::string Error;
   EngineBuilder builder(std::unique_ptr<Module>(unwrap(M)));
   builder.setEngineKind(EngineKind::Either)
          .setErrorStr(&Error);
   if (ExecutionEngine *EE = builder.create()){
     *OutEE = wrap(EE);
     return 0;
   }
   *OutError = strdup(Error.c_str());
   return 1;
 }

 LLVMBool LLVMCreateInterpreterForModule(LLVMExecutionEngineRef *OutInterp,
                                         LLVMModuleRef M,
                                         char **OutError) {
   std::string Error;
   EngineBuilder builder(std::unique_ptr<Module>(unwrap(M)));
   builder.setEngineKind(EngineKind::Interpreter)
          .setErrorStr(&Error);
   if (ExecutionEngine *Interp = builder.create()) {
     *OutInterp = wrap(Interp);
     return 0;
   }
   *OutError = strdup(Error.c_str());
   return 1;
 }

 LLVMBool LLVMCreateJITCompilerForModule(LLVMExecutionEngineRef *OutJIT,
                                         LLVMModuleRef M,
                                         unsigned OptLevel,
                                         char **OutError) {
   std::string Error;
   EngineBuilder builder(std::unique_ptr<Module>(unwrap(M)));
   builder.setEngineKind(EngineKind::JIT)
          .setErrorStr(&Error)
          .setOptLevel((CodeGenOpt::Level)OptLevel);
   if (ExecutionEngine *JIT = builder.create()) {
     *OutJIT = wrap(JIT);
     return 0;
   }
   *OutError = strdup(Error.c_str());
   return 1;
 }

 void LLVMInitializeMCJITCompilerOptions(LLVMMCJITCompilerOptions *PassedOptions,
                                         size_t SizeOfPassedOptions) {
   LLVMMCJITCompilerOptions options;
   memset(&options, 0, sizeof(options)); // Most fields are zero by default.
   options.CodeModel = LLVMCodeModelJITDefault;

   memcpy(PassedOptions, &options,
          std::min(sizeof(options), SizeOfPassedOptions));
 }

 LLVMBool LLVMCreateMCJITCompilerForModule(
     LLVMExecutionEngineRef *OutJIT, LLVMModuleRef M,
     LLVMMCJITCompilerOptions *PassedOptions, size_t SizeOfPassedOptions,
     char **OutError) {
   LLVMMCJITCompilerOptions options;
   // If the user passed a larger sized options struct, then they were compiled
   // against a newer LLVM. Tell them that something is wrong.
   if (SizeOfPassedOptions > sizeof(options)) {
     *OutError = strdup(
       "Refusing to use options struct that is larger than my own; assuming "
       "LLVM library mismatch.");
     return 1;
   }

   // Defend against the user having an old version of the API by ensuring that
   // any fields they didn't see are cleared. We must defend against fields being
   // set to the bitwise equivalent of zero, and assume that this means "do the
   // default" as if that option hadn't been available.
   LLVMInitializeMCJITCompilerOptions(&options, sizeof(options));
   memcpy(&options, PassedOptions, SizeOfPassedOptions);

   TargetOptions targetOptions;
   targetOptions.EnableFastISel = options.EnableFastISel;
   std::unique_ptr<Module> Mod(unwrap(M));

   if (Mod)
     // Set function attribute "no-frame-pointer-elim" based on
     // NoFramePointerElim.
     for (auto &F : *Mod) {
       auto Attrs = F.getAttributes();
       StringRef Value(options.NoFramePointerElim ? "true" : "false");
       Attrs = Attrs.addAttribute(F.getContext(), AttributeList::FunctionIndex,
                                  "no-frame-pointer-elim", Value);
       F.setAttributes(Attrs);
     }

   std::string Error;
   EngineBuilder builder(std::move(Mod));
   builder.setEngineKind(EngineKind::JIT)
          .setErrorStr(&Error)
          .setOptLevel((CodeGenOpt::Level)options.OptLevel)
          .setTargetOptions(targetOptions);
   bool JIT;
   if (Optional<CodeModel::Model> CM = unwrap(options.CodeModel, JIT))
     builder.setCodeModel(*CM);
   if (options.MCJMM)
     builder.setMCJITMemoryManager(
       std::unique_ptr<RTDyldMemoryManager>(unwrap(options.MCJMM)));
   if (ExecutionEngine *JIT = builder.create()) {
     *OutJIT = wrap(JIT);
     return 0;
   }
   *OutError = strdup(Error.c_str());
   return 1;
 }

 void LLVMDisposeExecutionEngine(LLVMExecutionEngineRef EE) {
   delete unwrap(EE);
 }

 void LLVMRunStaticConstructors(LLVMExecutionEngineRef EE) {
   unwrap(EE)->finalizeObject();
   unwrap(EE)->runStaticConstructorsDestructors(false);
 }

 void LLVMRunStaticDestructors(LLVMExecutionEngineRef EE) {
   unwrap(EE)->finalizeObject();
   unwrap(EE)->runStaticConstructorsDestructors(true);
 }

 int LLVMRunFunctionAsMain(LLVMExecutionEngineRef EE, LLVMValueRef F,
                           unsigned ArgC, const char * const *ArgV,
                           const char * const *EnvP) {
   unwrap(EE)->finalizeObject();

   std::vector<std::string> ArgVec(ArgV, ArgV + ArgC);
   return unwrap(EE)->runFunctionAsMain(unwrap<Function>(F), ArgVec, EnvP);
 }

 LLVMGenericValueRef LLVMRunFunction(LLVMExecutionEngineRef EE, LLVMValueRef F,
                                     unsigned NumArgs,
                                     LLVMGenericValueRef *Args) {
   unwrap(EE)->finalizeObject();

   std::vector<GenericValue> ArgVec;
   ArgVec.reserve(NumArgs);
   for (unsigned I = 0; I != NumArgs; ++I)
     ArgVec.push_back(*unwrap(Args[I]));

   GenericValue *Result = new GenericValue();
   *Result = unwrap(EE)->runFunction(unwrap<Function>(F), ArgVec);
   return wrap(Result);
 }

 void LLVMFreeMachineCodeForFunction(LLVMExecutionEngineRef EE, LLVMValueRef F) {
 }

 void LLVMAddModule(LLVMExecutionEngineRef EE, LLVMModuleRef M){
   unwrap(EE)->addModule(std::unique_ptr<Module>(unwrap(M)));
 }

 LLVMBool LLVMRemoveModule(LLVMExecutionEngineRef EE, LLVMModuleRef M,
                           LLVMModuleRef *OutMod, char **OutError) {
   Module *Mod = unwrap(M);
   unwrap(EE)->removeModule(Mod);
   *OutMod = wrap(Mod);
   return 0;
 }

 LLVMBool LLVMFindFunction(LLVMExecutionEngineRef EE, const char *Name,
                           LLVMValueRef *OutFn) {
   if (Function *F = unwrap(EE)->FindFunctionNamed(Name)) {
     *OutFn = wrap(F);
     return 0;
   }
   return 1;
 }

 void *LLVMRecompileAndRelinkFunction(LLVMExecutionEngineRef EE,
                                      LLVMValueRef Fn) {
   return nullptr;
 }

 LLVMTargetDataRef LLVMGetExecutionEngineTargetData(LLVMExecutionEngineRef EE) {
   return wrap(&unwrap(EE)->getDataLayout());
 }

 LLVMTargetMachineRef
 LLVMGetExecutionEngineTargetMachine(LLVMExecutionEngineRef EE) {
   return wrap(unwrap(EE)->getTargetMachine());
 }

 void LLVMAddGlobalMapping(LLVMExecutionEngineRef EE, LLVMValueRef Global,
                           void* Addr) {
   unwrap(EE)->addGlobalMapping(unwrap<GlobalValue>(Global), Addr);
 }

 void *LLVMGetPointerToGlobal(LLVMExecutionEngineRef EE, LLVMValueRef Global) {
   unwrap(EE)->finalizeObject();

   return unwrap(EE)->getPointerToGlobal(unwrap<GlobalValue>(Global));
 }

 uint64_t LLVMGetGlobalValueAddress(LLVMExecutionEngineRef EE, const char *Name) {
   return unwrap(EE)->getGlobalValueAddress(Name);
 }

 uint64_t LLVMGetFunctionAddress(LLVMExecutionEngineRef EE, const char *Name) {
   return unwrap(EE)->getFunctionAddress(Name);
 }

 /*===-- Operations on memory managers -------------------------------------===*/

 namespace {

 struct SimpleBindingMMFunctions {
   LLVMMemoryManagerAllocateCodeSectionCallback AllocateCodeSection;
   LLVMMemoryManagerAllocateDataSectionCallback AllocateDataSection;
   LLVMMemoryManagerFinalizeMemoryCallback FinalizeMemory;
   LLVMMemoryManagerDestroyCallback Destroy;
 };

 class SimpleBindingMemoryManager : public RTDyldMemoryManager {
 public:
   SimpleBindingMemoryManager(const SimpleBindingMMFunctions& Functions,
                              void *Opaque);
   ~SimpleBindingMemoryManager() override;

   uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
                                unsigned SectionID,
                                StringRef SectionName) override;

   uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
                                unsigned SectionID, StringRef SectionName,
                                bool isReadOnly) override;

   bool finalizeMemory(std::string *ErrMsg) override;

 private:
   SimpleBindingMMFunctions Functions;
   void *Opaque;
 };

 SimpleBindingMemoryManager::SimpleBindingMemoryManager(
   const SimpleBindingMMFunctions& Functions,
   void *Opaque)
   : Functions(Functions), Opaque(Opaque) {
   assert(Functions.AllocateCodeSection &&
          "No AllocateCodeSection function provided!");
   assert(Functions.AllocateDataSection &&
          "No AllocateDataSection function provided!");
   assert(Functions.FinalizeMemory &&
          "No FinalizeMemory function provided!");
   assert(Functions.Destroy &&
          "No Destroy function provided!");
 }

 SimpleBindingMemoryManager::~SimpleBindingMemoryManager() {
   Functions.Destroy(Opaque);
 }

 uint8_t *SimpleBindingMemoryManager::allocateCodeSection(
   uintptr_t Size, unsigned Alignment, unsigned SectionID,
   StringRef SectionName) {
   return Functions.AllocateCodeSection(Opaque, Size, Alignment, SectionID,
                                        SectionName.str().c_str());
 }

 uint8_t *SimpleBindingMemoryManager::allocateDataSection(
   uintptr_t Size, unsigned Alignment, unsigned SectionID,
   StringRef SectionName, bool isReadOnly) {
   return Functions.AllocateDataSection(Opaque, Size, Alignment, SectionID,
                                        SectionName.str().c_str(),
                                        isReadOnly);
 }

 bool SimpleBindingMemoryManager::finalizeMemory(std::string *ErrMsg) {
   char *errMsgCString = nullptr;
   bool result = Functions.FinalizeMemory(Opaque, &errMsgCString);
   assert((result || !errMsgCString) &&
          "Did not expect an error message if FinalizeMemory succeeded");
   if (errMsgCString) {
     if (ErrMsg)
       *ErrMsg = errMsgCString;
     free(errMsgCString);
   }
   return result;
 }

 } // anonymous namespace

 LLVMMCJITMemoryManagerRef LLVMCreateSimpleMCJITMemoryManager(
   void *Opaque,
   LLVMMemoryManagerAllocateCodeSectionCallback AllocateCodeSection,
   LLVMMemoryManagerAllocateDataSectionCallback AllocateDataSection,
   LLVMMemoryManagerFinalizeMemoryCallback FinalizeMemory,
   LLVMMemoryManagerDestroyCallback Destroy) {

   if (!AllocateCodeSection || !AllocateDataSection || !FinalizeMemory ||
       !Destroy)
     return nullptr;

   SimpleBindingMMFunctions functions;
   functions.AllocateCodeSection = AllocateCodeSection;
   functions.AllocateDataSection = AllocateDataSection;
   functions.FinalizeMemory = FinalizeMemory;
   functions.Destroy = Destroy;
   return wrap(new SimpleBindingMemoryManager(functions, Opaque));
 }

 void LLVMDisposeMCJITMemoryManager(LLVMMCJITMemoryManagerRef MM) {
   delete unwrap(MM);
 }

 /*===-- JIT Event Listener functions -------------------------------------===*/


 #if !LLVM_USE_INTEL_JITEVENTS
 LLVMJITEventListenerRef LLVMCreateIntelJITEventListener(void)
 {
   return nullptr;
 }
 #endif

 #if !LLVM_USE_OPROFILE
 LLVMJITEventListenerRef LLVMCreateOProfileJITEventListener(void)
 {
   return nullptr;
 }
 #endif

 #if !LLVM_USE_PERF
 LLVMJITEventListenerRef LLVMCreatePerfJITEventListener(void)
 {
   return nullptr;
 }
 #endif
	//===-- ExecutionEngineBindings.cpp - C bindings for EEs ------------------===//
	//
	// 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 C bindings for the ExecutionEngine library.
	//
	//===----------------------------------------------------------------------===//

	#include "llvm-c/ExecutionEngine.h"
	#include "llvm/ExecutionEngine/ExecutionEngine.h"
	#include "llvm/ExecutionEngine/GenericValue.h"
	#include "llvm/ExecutionEngine/JITEventListener.h"
	#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
	#include "llvm/IR/DerivedTypes.h"
	#include "llvm/IR/Module.h"
	#include "llvm/Support/ErrorHandling.h"
	#include "llvm/Target/CodeGenCWrappers.h"
	#include "llvm/Target/TargetOptions.h"
	#include <cstring>

	using namespace llvm;

	#define DEBUG_TYPE "jit"

	// Wrapping the C bindings types.
	DEFINE_SIMPLE_CONVERSION_FUNCTIONS(GenericValue, LLVMGenericValueRef)


	static LLVMTargetMachineRef wrap(const TargetMachine *P) {
	return
	reinterpret_cast<LLVMTargetMachineRef>(const_cast<TargetMachine*>(P));
	}

	/===-- Operations on generic values --------------------------------------===/

	LLVMGenericValueRef LLVMCreateGenericValueOfInt(LLVMTypeRef Ty,
	unsigned long long N,
	LLVMBool IsSigned) {
	GenericValue *GenVal = new GenericValue();
	GenVal->IntVal = APInt(unwrap<IntegerType>(Ty)->getBitWidth(), N, IsSigned);
	return wrap(GenVal);
	}

	LLVMGenericValueRef LLVMCreateGenericValueOfPointer(void *P) {
	GenericValue *GenVal = new GenericValue();
	GenVal->PointerVal = P;
	return wrap(GenVal);
	}

	LLVMGenericValueRef LLVMCreateGenericValueOfFloat(LLVMTypeRef TyRef, double N) {
	GenericValue *GenVal = new GenericValue();
	switch (unwrap(TyRef)->getTypeID()) {
	case Type::FloatTyID:
	GenVal->FloatVal = N;
	break;
	case Type::DoubleTyID:
	GenVal->DoubleVal = N;
	break;
	default:
	llvm_unreachable("LLVMGenericValueToFloat supports only float and double.");
	}
	return wrap(GenVal);
	}

	unsigned LLVMGenericValueIntWidth(LLVMGenericValueRef GenValRef) {
	return unwrap(GenValRef)->IntVal.getBitWidth();
	}

	unsigned long long LLVMGenericValueToInt(LLVMGenericValueRef GenValRef,
	LLVMBool IsSigned) {
	GenericValue *GenVal = unwrap(GenValRef);
	if (IsSigned)
	return GenVal->IntVal.getSExtValue();
	else
	return GenVal->IntVal.getZExtValue();
	}

	void *LLVMGenericValueToPointer(LLVMGenericValueRef GenVal) {
	return unwrap(GenVal)->PointerVal;
	}

	double LLVMGenericValueToFloat(LLVMTypeRef TyRef, LLVMGenericValueRef GenVal) {
	switch (unwrap(TyRef)->getTypeID()) {
	case Type::FloatTyID:
	return unwrap(GenVal)->FloatVal;
	case Type::DoubleTyID:
	return unwrap(GenVal)->DoubleVal;
	default:
	llvm_unreachable("LLVMGenericValueToFloat supports only float and double.");
	}
	}

	void LLVMDisposeGenericValue(LLVMGenericValueRef GenVal) {
	delete unwrap(GenVal);
	}

	/===-- Operations on execution engines -----------------------------------===/

	LLVMBool LLVMCreateExecutionEngineForModule(LLVMExecutionEngineRef *OutEE,
	LLVMModuleRef M,
	char **OutError) {
	std::string Error;
	EngineBuilder builder(std::unique_ptr<Module>(unwrap(M)));
	builder.setEngineKind(EngineKind::Either)
	.setErrorStr(&Error);
	if (ExecutionEngine *EE = builder.create()){
	*OutEE = wrap(EE);
	return 0;
	}
	*OutError = strdup(Error.c_str());
	return 1;
	}

	LLVMBool LLVMCreateInterpreterForModule(LLVMExecutionEngineRef *OutInterp,
	LLVMModuleRef M,
	char **OutError) {
	std::string Error;
	EngineBuilder builder(std::unique_ptr<Module>(unwrap(M)));
	builder.setEngineKind(EngineKind::Interpreter)
	.setErrorStr(&Error);
	if (ExecutionEngine *Interp = builder.create()) {
	*OutInterp = wrap(Interp);
	return 0;
	}
	*OutError = strdup(Error.c_str());
	return 1;
	}

	LLVMBool LLVMCreateJITCompilerForModule(LLVMExecutionEngineRef *OutJIT,
	LLVMModuleRef M,
	unsigned OptLevel,
	char **OutError) {
	std::string Error;
	EngineBuilder builder(std::unique_ptr<Module>(unwrap(M)));
	builder.setEngineKind(EngineKind::JIT)
	.setErrorStr(&Error)
	.setOptLevel((CodeGenOpt::Level)OptLevel);
	if (ExecutionEngine *JIT = builder.create()) {
	*OutJIT = wrap(JIT);
	return 0;
	}
	*OutError = strdup(Error.c_str());
	return 1;
	}

	void LLVMInitializeMCJITCompilerOptions(LLVMMCJITCompilerOptions *PassedOptions,
	size_t SizeOfPassedOptions) {
	LLVMMCJITCompilerOptions options;
	memset(&options, 0, sizeof(options)); // Most fields are zero by default.
	options.CodeModel = LLVMCodeModelJITDefault;

	memcpy(PassedOptions, &options,
	std::min(sizeof(options), SizeOfPassedOptions));
	}

	LLVMBool LLVMCreateMCJITCompilerForModule(
	LLVMExecutionEngineRef *OutJIT, LLVMModuleRef M,
	LLVMMCJITCompilerOptions *PassedOptions, size_t SizeOfPassedOptions,
	char **OutError) {
	LLVMMCJITCompilerOptions options;
	// If the user passed a larger sized options struct, then they were compiled
	// against a newer LLVM. Tell them that something is wrong.
	if (SizeOfPassedOptions > sizeof(options)) {
	*OutError = strdup(
	"Refusing to use options struct that is larger than my own; assuming "
	"LLVM library mismatch.");
	return 1;
	}

	// Defend against the user having an old version of the API by ensuring that
	// any fields they didn't see are cleared. We must defend against fields being
	// set to the bitwise equivalent of zero, and assume that this means "do the
	// default" as if that option hadn't been available.
	LLVMInitializeMCJITCompilerOptions(&options, sizeof(options));
	memcpy(&options, PassedOptions, SizeOfPassedOptions);

	TargetOptions targetOptions;
	targetOptions.EnableFastISel = options.EnableFastISel;
	std::unique_ptr<Module> Mod(unwrap(M));

	if (Mod)
	// Set function attribute "no-frame-pointer-elim" based on
	// NoFramePointerElim.
	for (auto &F : *Mod) {
	auto Attrs = F.getAttributes();
	StringRef Value(options.NoFramePointerElim ? "true" : "false");
	Attrs = Attrs.addAttribute(F.getContext(), AttributeList::FunctionIndex,
	"no-frame-pointer-elim", Value);
	F.setAttributes(Attrs);
	}

	std::string Error;
	EngineBuilder builder(std::move(Mod));
	builder.setEngineKind(EngineKind::JIT)
	.setErrorStr(&Error)
	.setOptLevel((CodeGenOpt::Level)options.OptLevel)
	.setTargetOptions(targetOptions);
	bool JIT;
	if (Optional<CodeModel::Model> CM = unwrap(options.CodeModel, JIT))
	builder.setCodeModel(*CM);
	if (options.MCJMM)
	builder.setMCJITMemoryManager(
	std::unique_ptr<RTDyldMemoryManager>(unwrap(options.MCJMM)));
	if (ExecutionEngine *JIT = builder.create()) {
	*OutJIT = wrap(JIT);
	return 0;
	}
	*OutError = strdup(Error.c_str());
	return 1;
	}

	void LLVMDisposeExecutionEngine(LLVMExecutionEngineRef EE) {
	delete unwrap(EE);
	}

	void LLVMRunStaticConstructors(LLVMExecutionEngineRef EE) {
	unwrap(EE)->finalizeObject();
	unwrap(EE)->runStaticConstructorsDestructors(false);
	}

	void LLVMRunStaticDestructors(LLVMExecutionEngineRef EE) {
	unwrap(EE)->finalizeObject();
	unwrap(EE)->runStaticConstructorsDestructors(true);
	}

	int LLVMRunFunctionAsMain(LLVMExecutionEngineRef EE, LLVMValueRef F,
	unsigned ArgC, const char * const *ArgV,
	const char * const *EnvP) {
	unwrap(EE)->finalizeObject();

	std::vector<std::string> ArgVec(ArgV, ArgV + ArgC);
	return unwrap(EE)->runFunctionAsMain(unwrap<Function>(F), ArgVec, EnvP);
	}

	LLVMGenericValueRef LLVMRunFunction(LLVMExecutionEngineRef EE, LLVMValueRef F,
	unsigned NumArgs,
	LLVMGenericValueRef *Args) {
	unwrap(EE)->finalizeObject();

	std::vector<GenericValue> ArgVec;
	ArgVec.reserve(NumArgs);
	for (unsigned I = 0; I != NumArgs; ++I)
	ArgVec.push_back(*unwrap(Args[I]));

	GenericValue *Result = new GenericValue();
	*Result = unwrap(EE)->runFunction(unwrap<Function>(F), ArgVec);
	return wrap(Result);
	}

	void LLVMFreeMachineCodeForFunction(LLVMExecutionEngineRef EE, LLVMValueRef F) {
	}

	void LLVMAddModule(LLVMExecutionEngineRef EE, LLVMModuleRef M){
	unwrap(EE)->addModule(std::unique_ptr<Module>(unwrap(M)));
	}

	LLVMBool LLVMRemoveModule(LLVMExecutionEngineRef EE, LLVMModuleRef M,
	LLVMModuleRef OutMod, char *OutError) {
	Module *Mod = unwrap(M);
	unwrap(EE)->removeModule(Mod);
	*OutMod = wrap(Mod);
	return 0;
	}

	LLVMBool LLVMFindFunction(LLVMExecutionEngineRef EE, const char *Name,
	LLVMValueRef *OutFn) {
	if (Function *F = unwrap(EE)->FindFunctionNamed(Name)) {
	*OutFn = wrap(F);
	return 0;
	}
	return 1;
	}

	void *LLVMRecompileAndRelinkFunction(LLVMExecutionEngineRef EE,
	LLVMValueRef Fn) {
	return nullptr;
	}

	LLVMTargetDataRef LLVMGetExecutionEngineTargetData(LLVMExecutionEngineRef EE) {
	return wrap(&unwrap(EE)->getDataLayout());
	}

	LLVMTargetMachineRef
	LLVMGetExecutionEngineTargetMachine(LLVMExecutionEngineRef EE) {
	return wrap(unwrap(EE)->getTargetMachine());
	}

	void LLVMAddGlobalMapping(LLVMExecutionEngineRef EE, LLVMValueRef Global,
	void* Addr) {
	unwrap(EE)->addGlobalMapping(unwrap<GlobalValue>(Global), Addr);
	}

	void *LLVMGetPointerToGlobal(LLVMExecutionEngineRef EE, LLVMValueRef Global) {
	unwrap(EE)->finalizeObject();

	return unwrap(EE)->getPointerToGlobal(unwrap<GlobalValue>(Global));
	}

	uint64_t LLVMGetGlobalValueAddress(LLVMExecutionEngineRef EE, const char *Name) {
	return unwrap(EE)->getGlobalValueAddress(Name);
	}

	uint64_t LLVMGetFunctionAddress(LLVMExecutionEngineRef EE, const char *Name) {
	return unwrap(EE)->getFunctionAddress(Name);
	}

	/===-- Operations on memory managers -------------------------------------===/

	namespace {

	struct SimpleBindingMMFunctions {
	LLVMMemoryManagerAllocateCodeSectionCallback AllocateCodeSection;
	LLVMMemoryManagerAllocateDataSectionCallback AllocateDataSection;
	LLVMMemoryManagerFinalizeMemoryCallback FinalizeMemory;
	LLVMMemoryManagerDestroyCallback Destroy;
	};

	class SimpleBindingMemoryManager : public RTDyldMemoryManager {
	public:
	SimpleBindingMemoryManager(const SimpleBindingMMFunctions& Functions,
	void *Opaque);
	~SimpleBindingMemoryManager() override;

	uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
	unsigned SectionID,
	StringRef SectionName) override;

	uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
	unsigned SectionID, StringRef SectionName,
	bool isReadOnly) override;

	bool finalizeMemory(std::string *ErrMsg) override;

	private:
	SimpleBindingMMFunctions Functions;
	void *Opaque;
	};

	SimpleBindingMemoryManager::SimpleBindingMemoryManager(
	const SimpleBindingMMFunctions& Functions,
	void *Opaque)
	: Functions(Functions), Opaque(Opaque) {
	assert(Functions.AllocateCodeSection &&
	"No AllocateCodeSection function provided!");
	assert(Functions.AllocateDataSection &&
	"No AllocateDataSection function provided!");
	assert(Functions.FinalizeMemory &&
	"No FinalizeMemory function provided!");
	assert(Functions.Destroy &&
	"No Destroy function provided!");
	}

	SimpleBindingMemoryManager::~SimpleBindingMemoryManager() {
	Functions.Destroy(Opaque);
	}

	uint8_t *SimpleBindingMemoryManager::allocateCodeSection(
	uintptr_t Size, unsigned Alignment, unsigned SectionID,
	StringRef SectionName) {
	return Functions.AllocateCodeSection(Opaque, Size, Alignment, SectionID,
	SectionName.str().c_str());
	}

	uint8_t *SimpleBindingMemoryManager::allocateDataSection(
	uintptr_t Size, unsigned Alignment, unsigned SectionID,
	StringRef SectionName, bool isReadOnly) {
	return Functions.AllocateDataSection(Opaque, Size, Alignment, SectionID,
	SectionName.str().c_str(),
	isReadOnly);
	}

	bool SimpleBindingMemoryManager::finalizeMemory(std::string *ErrMsg) {
	char *errMsgCString = nullptr;
	bool result = Functions.FinalizeMemory(Opaque, &errMsgCString);
	assert((result \|\| !errMsgCString) &&
	"Did not expect an error message if FinalizeMemory succeeded");
	if (errMsgCString) {
	if (ErrMsg)
	*ErrMsg = errMsgCString;
	free(errMsgCString);
	}
	return result;
	}

	} // anonymous namespace

	LLVMMCJITMemoryManagerRef LLVMCreateSimpleMCJITMemoryManager(
	void *Opaque,
	LLVMMemoryManagerAllocateCodeSectionCallback AllocateCodeSection,
	LLVMMemoryManagerAllocateDataSectionCallback AllocateDataSection,
	LLVMMemoryManagerFinalizeMemoryCallback FinalizeMemory,
	LLVMMemoryManagerDestroyCallback Destroy) {

	if (!AllocateCodeSection \|\| !AllocateDataSection \|\| !FinalizeMemory \|\|
	!Destroy)
	return nullptr;

	SimpleBindingMMFunctions functions;
	functions.AllocateCodeSection = AllocateCodeSection;
	functions.AllocateDataSection = AllocateDataSection;
	functions.FinalizeMemory = FinalizeMemory;
	functions.Destroy = Destroy;
	return wrap(new SimpleBindingMemoryManager(functions, Opaque));
	}

	void LLVMDisposeMCJITMemoryManager(LLVMMCJITMemoryManagerRef MM) {
	delete unwrap(MM);
	}

	/===-- JIT Event Listener functions -------------------------------------===/


	#if !LLVM_USE_INTEL_JITEVENTS
	LLVMJITEventListenerRef LLVMCreateIntelJITEventListener(void)
	{
	return nullptr;
	}
	#endif

	#if !LLVM_USE_OPROFILE
	LLVMJITEventListenerRef LLVMCreateOProfileJITEventListener(void)
	{
	return nullptr;
	}
	#endif

	#if !LLVM_USE_PERF
	LLVMJITEventListenerRef LLVMCreatePerfJITEventListener(void)
	{
	return nullptr;
	}
	#endif