beefytech.Beef/IDEHelper/Compiler/BfIRCodeGen.cpp

#include "BfIRCodeGen.h"
#include "BfModule.h"
#include "BeefySysLib/util/BeefPerf.h"

#pragma warning(push)
#pragma warning(disable:4141)
#pragma warning(disable:4146)
#pragma warning(disable:4291)
#pragma warning(disable:4244)
#pragma warning(disable:4267)
#pragma warning(disable:4624)
#pragma warning(disable:4800)
#pragma warning(disable:4996)

#include "llvm/IR/Module.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/IR/InlineAsm.h"
#include "llvm/IR/Attributes.h"
#include "llvm/Support/FileSystem.h"
//#include "llvm/Support/Dwarf.h"
#include "llvm/IR/DIBuilder.h"

#include "llvm/ADT/Triple.h"
//#include "llvm/CodeGen/CommandFlags.h"
#include "llvm/CodeGen/LinkAllAsmWriterComponents.h"
#include "llvm/CodeGen/LinkAllCodegenComponents.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/IRPrintingPasses.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IRReader/IRReader.h"
#include "llvm/MC/SubtargetFeature.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/Pass.h"
#include "llvm/Transforms/IPO/PassManagerBuilder.h"
#include "llvm/Transforms/Utils.h"
#include "llvm/Transforms/Scalar/InstSimplifyPass.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/PluginLoader.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/ToolOutputFile.h"
//#include "llvm/Target/TargetLibraryInfo.h"
#include "llvm/Target/TargetMachine.h"
//#include "llvm/Target/TargetSubtargetInfo.h"
#include "llvm/Transforms/IPO/PassManagerBuilder.h"
#include "llvm-c/Transforms/PassManagerBuilder.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Analysis/Passes.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/Verifier.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Analysis/BasicAliasAnalysis.h"
//#include "llvm/Analysis/CFLAliasAnalysis.h"
#include "llvm/Analysis/CFLAndersAliasAnalysis.h"
#include "llvm/Analysis/CFLSteensAliasAnalysis.h"
#include "llvm/Analysis/GlobalsModRef.h"
#include "llvm/Analysis/ScopedNoAliasAA.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/Analysis/TypeBasedAliasAnalysis.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Transforms/IPO.h"
#include "llvm/Transforms/IPO/ForceFunctionAttrs.h"
#include "llvm/Transforms/IPO/FunctionAttrs.h"
#include "llvm/Transforms/IPO/InferFunctionAttrs.h"
#include "llvm/Transforms/IPO/AlwaysInliner.h"
#include "llvm/Transforms/Instrumentation.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Transforms/Scalar/GVN.h"
#include "llvm/Transforms/Vectorize.h"
#include "llvm/Transforms/AggressiveInstCombine/AggressiveInstCombine.h"
#include "llvm/Transforms/InstCombine/InstCombine.h"
#include "llvm/Transforms/Scalar/SimpleLoopUnswitch.h"

//#include "llvm/Bitcode/ReaderWriter.h"

#include "llvm/Analysis/Passes.h"
#include "llvm/Transforms/IPO.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Transforms/Vectorize.h"
#include "llvm/Pass.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/Support/raw_ostream.h"

#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/Support/TargetRegistry.h"

#include "llvm/LTO/LTOBackend.h"
#include "llvm/Bitcode/BitcodeWriter.h"
#include "llvm/Bitcode/BitcodeReader.h"
#include "llvm/Bitcode/BitcodeWriterPass.h"
#include "llvm/Transforms/IPO/ThinLTOBitcodeWriter.h"

#include "../LLVMUtils.h"

#pragma warning(pop)

USING_NS_BF;

#pragma warning(disable:4146)

struct BuiltinEntry
{
	const char* mName;
	bool operator<(const StringImpl& rhs) const
	{
		return strcmp(mName, rhs.c_str()) < 0;
	}
};

static const BuiltinEntry gIntrinEntries[] =
{
	{"atomic_add"},
	{"atomic_and"},
	{"atomic_cmpstore"},
	{"atomic_cmpstore_weak"},
	{"atomic_cmpxchg"},	
	{"atomic_fence"},
	{"atomic_load"},	
	{"atomic_max"},
	{"atomic_min"},
	{"atomic_nand"},
	{"atomic_or"},
	{"atomic_store"},
	{"atomic_sub"},
	{"atomic_umax"},
	{"atomic_umin"},
	{"atomic_xchg"},
	{"atomic_xor"},
	{"bswap"},
	{"cos"},
	{"floor"},
	{"free"},
	{"log"},
	{"log10"},
	{"log2"},
	{"malloc"},
	{"memcpy"},
	{"memmove"},
	{"memset"},
	{"pow"},
	{"powi"},
	{"round"},
	{"sin"},
	{"sqrt"},
};

#define CMD_PARAM(ty, name) ty name; Read(name);
BF_STATIC_ASSERT(BF_ARRAY_COUNT(gIntrinEntries) == BfIRIntrinsic_COUNT);

template <typename T>
class CmdParamVec : public llvm::SmallVector<T, 8>
{};

static int GetLLVMCallingConv(BfIRCallingConv callingConv)
{
	int llvmCallingConv = llvm::CallingConv::C;
	if (callingConv == BfIRCallingConv_ThisCall)
		llvmCallingConv = llvm::CallingConv::X86_ThisCall;
	else if (callingConv == BfIRCallingConv_StdCall)
		llvmCallingConv = llvm::CallingConv::X86_StdCall;
	else if (callingConv == BfIRCallingConv_CDecl)
		llvmCallingConv = llvm::CallingConv::C;
	return llvmCallingConv;
}

static llvm::GlobalValue::LinkageTypes LLVMMapLinkageType(BfIRLinkageType linkageType)
{
	llvm::GlobalValue::LinkageTypes llvmLinkageType;
	if (linkageType == BfIRLinkageType_Internal)
		llvmLinkageType = llvm::GlobalValue::InternalLinkage;
	else
		llvmLinkageType = llvm::GlobalValue::ExternalLinkage;
	return llvmLinkageType;
}

static llvm::Attribute::AttrKind LLVMMapAttribute(BfIRAttribute attr)
{
	switch (attr)
	{
	case BfIRAttribute_NoReturn: return llvm::Attribute::NoReturn;
	case BfIRAttribute_NoAlias: return llvm::Attribute::NoAlias;
	case BfIRAttribute_NoCapture: return llvm::Attribute::NoCapture;
	case BfIRAttribute_StructRet: return llvm::Attribute::StructRet;
	case BfIRAttribute_ZExt: return llvm::Attribute::ZExt;
	case BFIRAttribute_NoUnwind: return llvm::Attribute::NoUnwind;
	case BFIRAttribute_UWTable: return llvm::Attribute::UWTable;
	case BFIRAttribute_AlwaysInline: return llvm::Attribute::AlwaysInline;
	default: break;
	}
	return llvm::Attribute::None;
}

void BfIRCodeGen::PrintModule()
{
	Beefy::debug_ostream os;
	mLLVMModule->print(os, NULL, false, true);
	os << "\n";
	os.flush();
}

void BfIRCodeGen::PrintFunction()
{
	Beefy::debug_ostream os;
	mActiveFunction->print(os);
	os << "\n";
	os.flush();
}

BfTypeCode BfIRCodeGen::GetTypeCode(llvm::Type* type, bool isSigned)
{
	if (type->isIntegerTy())
	{
		switch (type->getIntegerBitWidth())
		{
		case 8:
			return isSigned ? BfTypeCode_Int8 : BfTypeCode_UInt8;			
		case 16:
			return isSigned ? BfTypeCode_Int16 : BfTypeCode_UInt16;
		case 32:
			return isSigned ? BfTypeCode_Int32 : BfTypeCode_UInt32;
		case 64:
			return isSigned ? BfTypeCode_Int64 : BfTypeCode_UInt64;
		}
	}

	if (type->isFloatingPointTy())
		return BfTypeCode_Single;
	if (type->isDoubleTy())
		return BfTypeCode_Double;

	return BfTypeCode_None;
}

llvm::Type* BfIRCodeGen::GetLLVMType(BfTypeCode typeCode, bool& isSigned)
{
	if ((typeCode == BfTypeCode_IntPtr) || (typeCode == BfTypeCode_UIntPtr))
	{
		/*isSigned = typeCode == BfTypeCode_IntPtr;
		if (mModule->mSystem->mPtrSize == 4)
			return llvm::Type::getInt32Ty(*mLLVMContext);
		else
			return llvm::Type::getInt64Ty(*mLLVMContext);*/
		BF_FATAL("Unsupported");
	}

	isSigned = false;
	switch (typeCode)
	{
	case BfTypeCode_None:
		return llvm::Type::getVoidTy(*mLLVMContext);
	case BfTypeCode_NullPtr:
		return llvm::Type::getInt8PtrTy(*mLLVMContext);
	case BfTypeCode_Boolean:
		return llvm::Type::getInt1Ty(*mLLVMContext);
	case BfTypeCode_Int8:
		isSigned = true;
		return llvm::Type::getInt8Ty(*mLLVMContext);
	case BfTypeCode_UInt8:
	case BfTypeCode_Char8:
		return llvm::Type::getInt8Ty(*mLLVMContext);
	case BfTypeCode_Int16:
		isSigned = true;
		return llvm::Type::getInt16Ty(*mLLVMContext);
	case BfTypeCode_UInt16:
	case BfTypeCode_Char16:
		return llvm::Type::getInt16Ty(*mLLVMContext);
	case BfTypeCode_Int32:
		isSigned = true;
		return llvm::Type::getInt32Ty(*mLLVMContext);
	case BfTypeCode_UInt32:
	case BfTypeCode_Char32:
		return llvm::Type::getInt32Ty(*mLLVMContext);
	case BfTypeCode_Int64:
		isSigned = true;
		return llvm::Type::getInt64Ty(*mLLVMContext);
	case BfTypeCode_UInt64:
		return llvm::Type::getInt64Ty(*mLLVMContext);
	case BfTypeCode_IntPtr:
		BF_FATAL("Illegal");
		/*isSigned = true;
		if (mModule->mSystem->mPtrSize == 4)
			return llvm::Type::getInt32Ty(*mLLVMContext);
		else
			return llvm::Type::getInt64Ty(*mLLVMContext);*/
	case BfTypeCode_UIntPtr:
		BF_FATAL("Illegal");
		/*if (mModule->mSystem->mPtrSize == 4)
			return llvm::Type::getInt32Ty(*mLLVMContext);
		else
			return llvm::Type::getInt64Ty(*mLLVMContext);*/
	case BfTypeCode_Single:
		return llvm::Type::getFloatTy(*mLLVMContext);
	case BfTypeCode_Double:	
		return llvm::Type::getDoubleTy(*mLLVMContext);
	default: break;
	}
	return NULL;
}

BfIRTypeEntry& BfIRCodeGen::GetTypeEntry(int typeId)
{
	BfIRTypeEntry& typeEntry = mTypes[typeId];
	if (typeEntry.mTypeId == -1)
		typeEntry.mTypeId = typeId;
	return typeEntry;
}

void BfIRCodeGen::SetResult(int id, llvm::Value* value)
{
	BfIRCodeGenEntry entry;
	entry.mKind = BfIRCodeGenEntryKind_LLVMValue;
	entry.mLLVMValue = value;
	mResults.TryAdd(id, entry);
}

void BfIRCodeGen::SetResult(int id, llvm::Type* type)
{	
	BfIRCodeGenEntry entry;
	entry.mKind = BfIRCodeGenEntryKind_LLVMType;	
	entry.mLLVMType = type;
	mResults.TryAdd(id, entry);
}

void BfIRCodeGen::SetResult(int id, llvm::BasicBlock * value)
{
	BfIRCodeGenEntry entry;
	entry.mKind = BfIRCodeGenEntryKind_LLVMBasicBlock;
	entry.mLLVMBlock = value;
	mResults.TryAdd(id, entry);
}

void BfIRCodeGen::SetResult(int id, llvm::MDNode* md)
{
	BfIRCodeGenEntry entry;
	entry.mKind = BfIRCodeGenEntryKind_LLVMMetadata;
	entry.mLLVMMetadata = md;
	mResults.TryAdd(id, entry);
}

BfIRCodeGen::BfIRCodeGen()
{
	mStream = NULL;
	mBfIRBuilder = NULL;
	
	mNopInlineAsm = NULL;
	mAsmObjectCheckAsm = NULL;
	mHasDebugLoc = false;
	mAttrSet = NULL;	
	mIRBuilder = NULL;
	mDIBuilder = NULL;
	mDICompileUnit = NULL;
	mActiveFunction = NULL;

    mLLVMContext = new llvm::LLVMContext();
	mLLVMModule = NULL;
	mIsCodeView = false;
	mCmdCount = 0;
}

BfIRCodeGen::~BfIRCodeGen()
{
	mDebugLoc = llvm::DebugLoc();
	mSavedDebugLocs.Clear();

	delete mStream;
	delete mIRBuilder;
	delete mDIBuilder;	
	delete mLLVMModule;
	delete mLLVMContext;		
}

void BfIRCodeGen::Fail(const StringImpl& error)
{
	if (mFailed)
		return;

	if (mHasDebugLoc)
	{
		auto dbgLoc = mIRBuilder->getCurrentDebugLocation();
		if (dbgLoc)
		{
			llvm::DIFile* file = NULL;
			if (llvm::DIScope* scope = llvm::dyn_cast<llvm::DIScope>(dbgLoc.getScope()))		
			{			
				BfIRCodeGenBase::Fail(StrFormat("%s at line %d:%d in %s/%s", error.c_str(), dbgLoc.getLine(), dbgLoc.getCol(), scope->getDirectory().data(), scope->getFilename().data()));
				return;
			}
		}
	}
	
	BfIRCodeGenBase::Fail(error);
}

void BfIRCodeGen::ProcessBfIRData(const BfSizedArray<uint8>& buffer)
{
	struct InlineAsmErrorHook
	{		
		static void StaticHandler(const llvm::SMDiagnostic& diag, void *context, unsigned locCookie)
		{
			if (diag.getKind() == llvm::SourceMgr::DK_Error)
			{
				BfIRCodeGen* irCodeGen = (BfIRCodeGen*)context;
				
				if (!irCodeGen->mErrorMsg.empty())
					irCodeGen->mErrorMsg += "\n";
				irCodeGen->mErrorMsg += StrFormat("Inline assembly error: \"%s\" : %s", diag.getMessage().data(), diag.getLineContents().data());
			}
		}		
	};	
	mLLVMContext->setInlineAsmDiagnosticHandler(InlineAsmErrorHook::StaticHandler, this);

	BF_ASSERT(mStream == NULL);
	mStream = new ChunkedDataBuffer();
	mStream->InitFlatRef(buffer.mVals, buffer.mSize);

	while (mStream->GetReadPos() < buffer.mSize)
	{	
		if (mFailed)
			break;
		HandleNextCmd();
	}

	BF_ASSERT((mFailed) || (mStream->GetReadPos() == buffer.mSize));
}

int64 BfIRCodeGen::ReadSLEB128()
{
	int64 val = 0;
	int64 shift = 0;
	uint8 byteVal;
	do
	{
		byteVal = mStream->Read();
		val |= ((int64)(byteVal & 0x7f)) << shift;
		shift += 7;

	} while (byteVal >= 128);
	// Sign extend negative numbers.
	if ((byteVal & 0x40) && (shift < 64))
		val |= (-1ULL) << shift;
	return val;
}

void BfIRCodeGen::Read(StringImpl& str)
{													   
	int len = (int)ReadSLEB128();	
	str.Append('?', len);
	mStream->Read((void*)str.c_str(), len);
}

void BfIRCodeGen::Read(int& i)
{
	i = (int)ReadSLEB128();
}

void BfIRCodeGen::Read(int64& i)
{
	i = ReadSLEB128();
}

void BfIRCodeGen::Read(bool& val)
{
	val = mStream->Read() != 0;
}

void BfIRCodeGen::Read(BfIRTypeEntry*& type)
{
	int typeId = (int)ReadSLEB128();
	type = &GetTypeEntry(typeId);
}

void BfIRCodeGen::Read(llvm::Type*& llvmType)
{
	BfIRType::TypeKind typeKind = (BfIRType::TypeKind)mStream->Read();
	if (typeKind == BfIRType::TypeKind::TypeKind_None)
	{
		llvmType = NULL;
		return;
	}

	if (typeKind == BfIRType::TypeKind::TypeKind_Stream)
	{
		int streamId = (int)ReadSLEB128();
		if (streamId == -1)
		{
			llvmType = NULL;
			return;
		}
		auto& result = mResults[streamId];
		BF_ASSERT(result.mKind == BfIRCodeGenEntryKind_LLVMType);
		llvmType = result.mLLVMType;
		return;
	}

	int typeId = (int)ReadSLEB128();
	auto& typeEntry = GetTypeEntry(typeId);
	if (typeKind == BfIRType::TypeKind::TypeKind_TypeId)
		llvmType = typeEntry.mLLVMType;
	else if (typeKind == BfIRType::TypeKind::TypeKind_TypeInstId)
		llvmType = typeEntry.mInstLLVMType;
	else if (typeKind == BfIRType::TypeKind::TypeKind_TypeInstPtrId)
		llvmType = typeEntry.mInstLLVMType->getPointerTo();
}

void BfIRCodeGen::Read(llvm::FunctionType*& llvmType)
{
	int streamId = (int)ReadSLEB128();
	auto& result = mResults[streamId];
	BF_ASSERT(result.mKind == BfIRCodeGenEntryKind_LLVMType);
	llvmType = (llvm::FunctionType*)result.mLLVMType;
}

void BfIRCodeGen::Read(llvm::Value*& llvmValue, BfIRCodeGenEntry** codeGenEntry)
{
	BfIRParamType paramType = (BfIRParamType)mStream->Read();
	if (paramType == BfIRParamType_None)
	{
		llvmValue = NULL;
	}
	else if (paramType == BfIRParamType_Const)
	{
		BfTypeCode typeCode = (BfTypeCode)mStream->Read();
		BfConstType constType = (BfConstType)typeCode;
		if (constType == BfConstType_GlobalVar)
		{
			CMD_PARAM(int, streamId);
			if (streamId == -1)
			{
				int streamId = mCmdCount++;

				CMD_PARAM(llvm::Type*, varType);
				CMD_PARAM(bool, isConstant);
				BfIRLinkageType linkageType = (BfIRLinkageType)mStream->Read();
				CMD_PARAM(llvm::Constant*, initializer);
				CMD_PARAM(String, name);
				CMD_PARAM(bool, isTLS);

				auto globalVariable = new llvm::GlobalVariable(
					*mLLVMModule,
					varType,
					isConstant,
					LLVMMapLinkageType(linkageType),
					initializer,
					name.c_str(), NULL, isTLS ? llvm::GlobalValue::GeneralDynamicTLSModel : llvm::GlobalValue::NotThreadLocal);
				llvmValue = globalVariable;

				SetResult(streamId, globalVariable);
			}
			else
				llvmValue = GetLLVMValue(streamId);
			return;
		}
		/*else if (constType == BfConstType_GlobalVar_TypeInst)
		{
			CMD_PARAM(int, streamId);
			if (streamId == -1)
			{
				int streamId = mStream->GetReadPos();

				CMD_PARAM(int, varTypeId);
				auto& typeEntry = GetTypeEntry(varTypeId);
				auto varType = typeEntry.mInstLLVMType;

				CMD_PARAM(bool, isConstant);
				BfIRLinkageType linkageType = (BfIRLinkageType)mStream->Read();
				CMD_PARAM(llvm::Constant*, initializer);
				CMD_PARAM(String, name);
				CMD_PARAM(bool, isTLS);

				auto globalVariable = new llvm::GlobalVariable(
					*mLLVMModule,
					varType,
					isConstant,
					LLVMMapLinkageType(linkageType),
					initializer,
					name, NULL, isTLS ? llvm::GlobalValue::GeneralDynamicTLSModel : llvm::GlobalValue::NotThreadLocal);
				llvmValue = globalVariable;

				SetResult(streamId, globalVariable);
			}
			else
				llvmValue = GetLLVMValue(streamId);
			return;
		}*/
		else if ((constType == BfConstType_BitCast) || (constType == BfConstType_BitCastNull))
		{
			CMD_PARAM(llvm::Constant*, target);
			CMD_PARAM(llvm::Type*, toType);

			if ((constType == BfConstType_BitCastNull) && (toType->isIntegerTy()))
			{
				llvmValue = llvm::ConstantInt::getNullValue(toType);
			}
			else if (target->getType()->isIntegerTy())
				llvmValue = llvm::ConstantExpr::getIntToPtr(target, toType);
			else
				llvmValue = llvm::ConstantExpr::getBitCast(target, toType);
			return;
		}
		else if (constType == BfConstType_GEP32_2)
		{
			CMD_PARAM(llvm::Constant*, target);
			CMD_PARAM(int, idx0);
			CMD_PARAM(int, idx1);
			llvm::Value* gepArgs[] = { 
				llvm::ConstantInt::get(llvm::Type::getInt32Ty(*mLLVMContext), idx0),
				llvm::ConstantInt::get(llvm::Type::getInt32Ty(*mLLVMContext), idx1)};
			llvmValue = llvm::ConstantExpr::getInBoundsGetElementPtr(NULL, target, gepArgs);
			return;
		}
		else if (constType == BfConstType_PtrToInt)
		{
			CMD_PARAM(llvm::Constant*, target);
			BfTypeCode toTypeCode = (BfTypeCode)mStream->Read();

			bool isSigned;
			llvm::Type* llvmToType = GetLLVMType(toTypeCode, isSigned);
			llvmValue = llvm::ConstantExpr::getPtrToInt(target, llvmToType);
			return;
		}
		else if (constType == BfConstType_AggZero)
		{
			CMD_PARAM(llvm::Type*, type);
			llvmValue = llvm::ConstantAggregateZero::get((llvm::CompositeType*)type);
			return;
		}
		else if (constType == BfConstType_Array)
		{
			CMD_PARAM(llvm::Type*, type);
			CMD_PARAM(CmdParamVec<llvm::Constant*>, values);

			auto arrayType = (llvm::ArrayType*)type;
			int fillCount = (int)(arrayType->getNumElements() - values.size());
			if (fillCount > 0)
			{
				auto lastValue = values.back();				
				for (int i = 0; i < fillCount; i++)
					values.push_back(lastValue);				
			}

			llvmValue = llvm::ConstantArray::get((llvm::ArrayType*)type, values);
			return;
		}

		bool isSigned;
		llvm::Type* llvmConstType = GetLLVMType(typeCode, isSigned);

		if (typeCode == BfTypeCode_Single)
		{
			float f;
			mStream->Read(&f, sizeof(float));
			llvmValue = llvm::ConstantFP::get(llvmConstType, f);
		}
		else if (typeCode == BfTypeCode_Double)
		{
			double d;
			mStream->Read(&d, sizeof(double));
			llvmValue = llvm::ConstantFP::get(llvmConstType, d);
		}
		else if (typeCode == BfTypeCode_Boolean)
		{
			CMD_PARAM(bool, boolVal);
			llvmValue = llvm::ConstantInt::get(llvmConstType, boolVal ? 1 : 0);
		}
		else if (typeCode == BfTypeCode_None)
		{
			llvmValue = NULL;			
		}
		else if (typeCode == BfTypeCode_NullPtr)
		{
			CMD_PARAM(llvm::Type*, nullType);
			if (nullType != NULL)
				llvmValue = llvm::ConstantPointerNull::get((llvm::PointerType*)nullType);
			else
				llvmValue = llvm::ConstantPointerNull::get((llvm::PointerType*)llvmConstType);
		}
		else if (BfIRBuilder::IsInt(typeCode))
		{			
			int64 intVal = ReadSLEB128();
			auto constVal = llvm::ConstantInt::get(llvmConstType, intVal);
			auto constInt = (llvm::ConstantInt*)constVal;
			llvmValue = constInt;
		}
		else
		{
			BF_FATAL("Unhandled");
		}
	}
	else if (paramType == BfIRParamType_Arg)
	{
		int argIdx = mStream->Read();
		BF_ASSERT(argIdx < mActiveFunction->arg_size());
		auto argItr = mActiveFunction->arg_begin();
		for (int i = 0; i < argIdx; i++)
			argItr++;
		llvmValue = &(*argItr);
	}
	else
	{
		int cmdId = -1;
		if (paramType == BfIRParamType_StreamId_Abs8)
		{
			cmdId = mStream->Read();			
		}
		else if (paramType == BfIRParamType_StreamId_Rel)
		{
			cmdId = mCmdCount - (int)ReadSLEB128();			
		}	
		else
		{
			cmdId = mCmdCount - (paramType - BfIRParamType_StreamId_Back1) - 1;			
		}	

		auto& result = mResults[cmdId];
		if (result.mKind != BfIRCodeGenEntryKind_LLVMValue)
		{
			if ((codeGenEntry != NULL) && (result.mKind != BfIRCodeGenEntryKind_None))
			{
				*codeGenEntry = &result;
				return;
			}
		}

		BF_ASSERT(result.mKind == BfIRCodeGenEntryKind_LLVMValue);
		llvmValue = result.mLLVMValue;
	}
}

void BfIRCodeGen::Read(llvm::Constant*& llvmConstant)
{
	llvm::Value* value;
	Read(value);
	if (value == NULL)
	{
		llvmConstant = NULL;
	}
	else
	{
		BF_ASSERT(llvm::isa<llvm::Constant>(value));
		llvmConstant = (llvm::Constant*)value;
	}
}

void BfIRCodeGen::Read(llvm::Function*& llvmFunc)
{
	int streamId = (int)ReadSLEB128();
	if (streamId == -1)
	{
		llvmFunc = NULL;
		return;
	}
	auto& result = mResults[streamId];
	BF_ASSERT(result.mKind == BfIRCodeGenEntryKind_LLVMValue);	
	BF_ASSERT(llvm::isa<llvm::Function>(result.mLLVMValue));
	llvmFunc = (llvm::Function*)result.mLLVMValue;
}

void BfIRCodeGen::Read(llvm::BasicBlock*& llvmBlock)
{
	int streamId = (int)ReadSLEB128();
	auto& result = mResults[streamId];
	BF_ASSERT(result.mKind == BfIRCodeGenEntryKind_LLVMBasicBlock);
	llvmBlock = (llvm::BasicBlock*)result.mLLVMType;
}

void BfIRCodeGen::Read(llvm::MDNode*& llvmMD)
{
	int streamId = (int)ReadSLEB128();
	if (streamId == -1)
	{
		llvmMD = NULL;
		return;
	}
	auto& result = mResults[streamId];
	BF_ASSERT(result.mKind == BfIRCodeGenEntryKind_LLVMMetadata);
	llvmMD = result.mLLVMMetadata;
}

void BfIRCodeGen::Read(llvm::Metadata*& llvmMD)
{
	int streamId = (int)ReadSLEB128();
	if (streamId == -1)
	{
		llvmMD = NULL;
		return;
	}
	auto& result = mResults[streamId];
	BF_ASSERT(result.mKind == BfIRCodeGenEntryKind_LLVMMetadata);
	llvmMD = result.mLLVMMetadata;
}

void BfIRCodeGen::AddNop()
{
	if ((mTargetTriple.GetMachineType() != BfMachineType_x86) && (mTargetTriple.GetMachineType() != BfMachineType_x64))
		return;

	if (mNopInlineAsm == NULL)
	{
		llvm::SmallVector<llvm::Type*, 8> paramTypes;
		llvm::FunctionType* funcType = llvm::FunctionType::get(llvm::Type::getVoidTy(*mLLVMContext), paramTypes, false);
		mNopInlineAsm = llvm::InlineAsm::get(funcType,
			"nop", "", true, false, llvm::InlineAsm::AD_ATT);
	}

	llvm::CallInst* callInst = mIRBuilder->CreateCall(mNopInlineAsm);
	callInst->addAttribute(llvm::AttributeList::FunctionIndex, llvm::Attribute::NoUnwind);
}

void BfIRCodeGen::CreateMemSet(llvm::Value* addr, llvm::Value* val, llvm::Value* size, int alignment, bool isVolatile)
{
	auto sizeConst = llvm::dyn_cast<llvm::ConstantInt>(size);
	auto valConst = llvm::dyn_cast<llvm::ConstantInt>(val);
	if ((!mIsOptimized) && (sizeConst != NULL) && (valConst != NULL))
	{
		int64 sizeVal = sizeConst->getSExtValue();
		uint8 setVal = (uint8)valConst->getSExtValue();
		if (sizeVal <= 128)
		{
			//llvm::Value* intVal = mIRBuilder->CreatePtrToInt(addr, llvm::Type::getInt32Ty(*mLLVMContext))

			int curOffset = 0;
			int sizeLeft = (int)sizeVal;
			llvm::Value* headVal;

			if (mPtrSize >= 8)
			{
				headVal = NULL;
				auto intTy = llvm::Type::getInt64Ty(*mLLVMContext);
				auto constVal = llvm::ConstantInt::get(intTy,
					((int64)setVal << 56) | ((int64)setVal << 48) | ((int64)setVal << 40) | ((int64)setVal << 32) |
					((int64)setVal << 24) | ((int64)setVal << 16) | ((int64)setVal << 8) | ((int64)setVal));
				while (sizeLeft >= 8)
				{
					if (headVal == NULL)
						headVal = mIRBuilder->CreateBitCast(addr, intTy->getPointerTo());
					llvm::Value* ptrVal = headVal;
					if (curOffset != 0)
						ptrVal = mIRBuilder->CreateConstInBoundsGEP1_32(NULL, headVal, curOffset / 8);
					mIRBuilder->CreateStore(constVal, ptrVal, isVolatile);

					curOffset += 8;
					sizeLeft -= 8;
				}
			}

			if (sizeLeft >= 4)
			{
				headVal = NULL;
				auto intTy = llvm::Type::getInt32Ty(*mLLVMContext);
				auto constVal = llvm::ConstantInt::get(intTy, ((int)setVal << 24) | ((int)setVal << 16) | ((int)setVal << 8) | ((int)setVal));
				while (sizeLeft >= 4)
				{
					if (headVal == NULL)
						headVal = mIRBuilder->CreateBitCast(addr, intTy->getPointerTo());
					llvm::Value* ptrVal = headVal;
					if (curOffset != 0)
						ptrVal = mIRBuilder->CreateConstInBoundsGEP1_32(NULL, headVal, curOffset / 4);
					mIRBuilder->CreateStore(constVal, ptrVal, isVolatile);

					curOffset += 4;
					sizeLeft -= 4;
				}
			}

			if (sizeLeft >= 2)
			{
				headVal = NULL;
				auto intTy = llvm::Type::getInt16Ty(*mLLVMContext);
				auto constVal = llvm::ConstantInt::get(intTy, ((int)setVal << 8) | ((int)setVal));
				while (sizeLeft >= 2)
				{
					if (headVal == NULL)
						headVal = mIRBuilder->CreateBitCast(addr, intTy->getPointerTo());
					llvm::Value* ptrVal = headVal;
					if (curOffset != 0)
						ptrVal = mIRBuilder->CreateConstInBoundsGEP1_32(NULL, headVal, curOffset / 2);
					mIRBuilder->CreateStore(constVal, ptrVal, isVolatile);

					curOffset += 2;
					sizeLeft -= 2;
				}
			}

			if (sizeLeft >= 1)
			{
				headVal = NULL;
				auto intTy = llvm::Type::getInt8Ty(*mLLVMContext);
				auto constVal = llvm::ConstantInt::get(intTy, ((int)setVal));
				while (sizeLeft >= 1)
				{
					if (headVal == NULL)
						headVal = mIRBuilder->CreateBitCast(addr, intTy->getPointerTo());
					llvm::Value* ptrVal = headVal;
					if (curOffset != 0)
						ptrVal = mIRBuilder->CreateConstInBoundsGEP1_32(NULL, headVal, curOffset / 1);
					mIRBuilder->CreateStore(constVal, ptrVal, isVolatile);

					curOffset += 1;
					sizeLeft -= 1;
				}
			}

			return;
		}
	}

	mIRBuilder->CreateMemSet(addr, val, size, alignment, isVolatile);
}

void BfIRCodeGen::HandleNextCmd()
{	
	int curId = mCmdCount;

	BfIRCmd cmd = (BfIRCmd)mStream->Read();
	mCmdCount++;

	switch (cmd)
	{
	case BfIRCmd_Module_Start:		
		{			
			CMD_PARAM(String, moduleName);
			CMD_PARAM(int, ptrSize);
			CMD_PARAM(bool, isOptimized);

			BF_ASSERT(mLLVMModule == NULL);
            mModuleName = moduleName;
			mPtrSize = ptrSize;
			mIsOptimized = isOptimized;
			mLLVMModule = new llvm::Module(moduleName.c_str(), *mLLVMContext);
			mIRBuilder = new llvm::IRBuilder<>(*mLLVMContext);

            //OutputDebugStrF("-------- Starting Module %s --------\n", moduleName.c_str());
		}
		break;
	case BfIRCmd_Module_SetTargetTriple:
		{
			CMD_PARAM(String, targetTriple);
			mTargetTriple.Set(targetTriple);
            if (targetTriple.IsEmpty())
                mLLVMModule->setTargetTriple(llvm::sys::getDefaultTargetTriple());
            else
                mLLVMModule->setTargetTriple(targetTriple.c_str());
		}
		break;
	case BfIRCmd_Module_AddModuleFlag:
		{
			CMD_PARAM(String, flag);
			CMD_PARAM(int, val);
			mLLVMModule->addModuleFlag(llvm::Module::Warning, flag.c_str(), val);

			if (flag == "CodeView")
				mIsCodeView = true;
		}
		break;
	case BfIRCmd_WriteIR:
		{
			CMD_PARAM(String, fileName);
			std::error_code ec;
			llvm::raw_fd_ostream outStream(fileName.c_str(), ec, llvm::sys::fs::OpenFlags::F_Text);
			if (ec)
			{
				Fail("Failed writing IR '" + fileName + "': " + ec.message());
			}
			else
				mLLVMModule->print(outStream, NULL);
		}
		break;
	case BfIRCmd_SetType:
		{
			CMD_PARAM(int, typeId);
			CMD_PARAM(llvm::Type*, type);						
			GetTypeEntry(typeId).mLLVMType = type;
		}
		break;
	case BfIRCmd_SetInstType:
		{
			CMD_PARAM(int, typeId);
			CMD_PARAM(llvm::Type*, type);
			GetTypeEntry(typeId).mInstLLVMType = type;
		}
		break;	
	case BfIRCmd_PrimitiveType:
		{
			BfTypeCode typeCode = (BfTypeCode)mStream->Read();
			bool isSigned;
			SetResult(curId, GetLLVMType(typeCode, isSigned));
		}
		break;
	case BfIRCmd_CreateStruct:
		{
			CMD_PARAM(String, typeName);
			SetResult(curId, llvm::StructType::create(*mLLVMContext, typeName.c_str()));
		}
		break;
	case BfIRCmd_StructSetBody:
		{
			CMD_PARAM(llvm::Type*, type);
			CMD_PARAM(CmdParamVec<llvm::Type*>, members);
			CMD_PARAM(bool, isPacked);
			BF_ASSERT(llvm::isa<llvm::StructType>(type));
			auto structType = (llvm::StructType*)type;
			if (structType->isOpaque())
				structType->setBody(members, isPacked);
		}
		break;
	case  BfIRCmd_Type:
		{
			CMD_PARAM(BfIRTypeEntry*, typeEntry);
			auto type = typeEntry->mLLVMType;
			SetResult(curId, type);
		}
		break;
	case  BfIRCmd_TypeInst:
		{
			CMD_PARAM(BfIRTypeEntry*, typeEntry);
			SetResult(curId, typeEntry->mInstLLVMType);
		}
		break;
	case BfIRCmd_TypeInstPtr:
		{
			CMD_PARAM(BfIRTypeEntry*, typeEntry);
			SetResult(curId, typeEntry->mInstLLVMType->getPointerTo());
		}
		break;	
	case BfIRCmd_GetType:
		{
			CMD_PARAM(llvm::Value*, value);
			auto type = value->getType();
			SetResult(curId, type);
		}
		break;	
	case BfIRCmd_GetPointerToFuncType:
		{
			CMD_PARAM(llvm::FunctionType*, funcType);
			SetResult(curId, funcType->getPointerTo());
		}
		break;
	case BfIRCmd_GetPointerToType:
		{
			CMD_PARAM(llvm::Type*, type);
			SetResult(curId, type->getPointerTo());
		}
		break;
	case BfIRCmd_GetSizedArrayType:
		{
			CMD_PARAM(llvm::Type*, elementType);
			CMD_PARAM(int, length);
			SetResult(curId, llvm::ArrayType::get(elementType, length));
		}
		break;	
	case BfIRCmd_CreateConstStruct:
		{
			CMD_PARAM(llvm::Type*, type);
			CMD_PARAM(CmdParamVec<llvm::Value*>, values)
			llvm::SmallVector<llvm::Constant*, 8> copyValues; 
			for (auto val : values)
				copyValues.push_back(llvm::dyn_cast<llvm::Constant>(val));
			SetResult(curId, llvm::ConstantStruct::get((llvm::StructType*)type, copyValues));
		}
		break;
	case BfIRCmd_CreateConstStructZero:
		{
			CMD_PARAM(llvm::Type*, type);
			SetResult(curId, llvm::ConstantAggregateZero::get((llvm::CompositeType*)type));
		}
		break;
	case BfIRCmd_CreateConstArray:
		{
			CMD_PARAM(llvm::Type*, type);
			CMD_PARAM(CmdParamVec<llvm::Constant*>, values);
			SetResult(curId, llvm::ConstantArray::get((llvm::ArrayType*)type, values));
		}
		break;
	case BfIRCmd_CreateConstString:
		{
			CMD_PARAM(String, str);
			SetResult(curId, llvm::ConstantDataArray::getString(*mLLVMContext, llvm::StringRef(str.c_str(), str.length())));
		}
		break;
	case BfIRCmd_ConfigConst:
		{
			CMD_PARAM(int, constIdx);
			BfTypeCode typeCode = (BfTypeCode)mStream->Read();
			if (typeCode == BfTypeCode_IntPtr)
				typeCode = (mPtrSize == 4) ? BfTypeCode_Int32 : BfTypeCode_Int64;
			llvm::Constant* constVal = (typeCode == BfTypeCode_Int32) ?
				mConfigConsts32[constIdx] :
				mConfigConsts64[constIdx];
			SetResult(curId, constVal);
		}
		break;
	case BfIRCmd_SetName:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(String, name);
			val->setName(name.c_str());
		}
		break;
	case BfIRCmd_CreateUndefValue:
		{
			CMD_PARAM(llvm::Type*, type);
			SetResult(curId, llvm::UndefValue::get(type));
		}
		break;
	case BfIRCmd_NumericCast:
		{	
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(bool, valIsSigned);
			BfTypeCode typeCode = (BfTypeCode)mStream->Read();
			BfTypeCode valTypeCode = GetTypeCode(val->getType(), valIsSigned);		
			bool toSigned;
			auto toLLVMType = GetLLVMType(typeCode, toSigned);		

			llvm::Value* retVal = NULL;

			if (BfIRBuilder::IsInt(typeCode))
			{			
				// Int -> Int
				if (BfIRBuilder::IsInt(valTypeCode))
				{
					retVal = mIRBuilder->CreateIntCast(val, toLLVMType, toSigned && valIsSigned);
				}
				else // Float -> Int
				{
					if (BfIRBuilder::IsSigned(typeCode))
						retVal = mIRBuilder->CreateFPToSI(val, toLLVMType);
					else
						retVal = mIRBuilder->CreateFPToUI(val, toLLVMType);
				}
			}
			else
			{
				// Int -> Float
				if (BfIRBuilder::IsInt(valTypeCode))
				{				
					if (BfIRBuilder::IsSigned(valTypeCode))
						retVal = mIRBuilder->CreateSIToFP(val, toLLVMType);
					else
						retVal = mIRBuilder->CreateUIToFP(val, toLLVMType);
				}
				else // Float -> Float
				{
					retVal = mIRBuilder->CreateFPCast(val, toLLVMType);
				}
			}
			SetResult(curId, retVal);
		}
		break;
	case BfIRCmd_CmpEQ:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);
			if (lhs->getType()->isFloatingPointTy())
				SetResult(curId, mIRBuilder->CreateFCmpOEQ(lhs, rhs));
			else
				SetResult(curId, mIRBuilder->CreateICmpEQ(lhs, rhs));
		}
		break;
	case BfIRCmd_CmpNE:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);
			if (lhs->getType()->isFloatingPointTy())
				SetResult(curId, mIRBuilder->CreateFCmpONE(lhs, rhs));
			else
				SetResult(curId, mIRBuilder->CreateICmpNE(lhs, rhs));
		}
		break;
	case BfIRCmd_CmpSLT:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);
			if (lhs->getType()->isFloatingPointTy())
				SetResult(curId, mIRBuilder->CreateFCmpOLT(lhs, rhs));
			else
				SetResult(curId, mIRBuilder->CreateICmpSLT(lhs, rhs));
		}
		break;
	case BfIRCmd_CmpULT:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);			
			if (lhs->getType()->isFloatingPointTy())
				SetResult(curId, mIRBuilder->CreateFCmpOLT(lhs, rhs));
			else
				SetResult(curId, mIRBuilder->CreateICmpULT(lhs, rhs));
		}
		break;
	case BfIRCmd_CmpSLE:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);
			if (lhs->getType()->isFloatingPointTy())
				SetResult(curId, mIRBuilder->CreateFCmpOLE(lhs, rhs));
			else
				SetResult(curId, mIRBuilder->CreateICmpSLE(lhs, rhs));
		}
		break;
	case BfIRCmd_CmpULE:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);			
			if (lhs->getType()->isFloatingPointTy())
				SetResult(curId, mIRBuilder->CreateFCmpOLE(lhs, rhs));
			else
				SetResult(curId, mIRBuilder->CreateICmpULE(lhs, rhs));
		}
		break;
	case BfIRCmd_CmpSGT:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);
			if (lhs->getType()->isFloatingPointTy())
				SetResult(curId, mIRBuilder->CreateFCmpUGT(lhs, rhs));
			else
				SetResult(curId, mIRBuilder->CreateICmpSGT(lhs, rhs));
		}
		break;
	case BfIRCmd_CmpUGT:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);			
			if (lhs->getType()->isFloatingPointTy())
				SetResult(curId, mIRBuilder->CreateFCmpOGT(lhs, rhs));
			else
				SetResult(curId, mIRBuilder->CreateICmpUGT(lhs, rhs));
		}
		break;
	case BfIRCmd_CmpSGE:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);
			if (lhs->getType()->isFloatingPointTy())
				SetResult(curId, mIRBuilder->CreateFCmpOGE(lhs, rhs));
			else
				SetResult(curId, mIRBuilder->CreateICmpSGE(lhs, rhs));
		}
		break;
	case BfIRCmd_CmpUGE:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);			
			if (lhs->getType()->isFloatingPointTy())
				SetResult(curId, mIRBuilder->CreateFCmpOGE(lhs, rhs));
			else
				SetResult(curId, mIRBuilder->CreateICmpUGE(lhs, rhs));
		}
		break;
	case BfIRCmd_Add:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);
			if (lhs->getType()->isFloatingPointTy())
				SetResult(curId, mIRBuilder->CreateFAdd(lhs, rhs));
			else
				SetResult(curId, mIRBuilder->CreateAdd(lhs, rhs));
		}
		break;
	case BfIRCmd_Sub:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);
			if (lhs->getType()->isFloatingPointTy())
				SetResult(curId, mIRBuilder->CreateFSub(lhs, rhs));
			else
				SetResult(curId, mIRBuilder->CreateSub(lhs, rhs));
		}
		break;
	case BfIRCmd_Mul:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);
			if (lhs->getType()->isFloatingPointTy())
				SetResult(curId, mIRBuilder->CreateFMul(lhs, rhs));
			else
				SetResult(curId, mIRBuilder->CreateMul(lhs, rhs));
		}
		break;
	case BfIRCmd_SDiv:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);
			if (lhs->getType()->isFloatingPointTy())
				SetResult(curId, mIRBuilder->CreateFDiv(lhs, rhs));
			else
				SetResult(curId, mIRBuilder->CreateSDiv(lhs, rhs));
		}
		break;
	case BfIRCmd_UDiv:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);			
			SetResult(curId, mIRBuilder->CreateUDiv(lhs, rhs));
		}
		break;
	case BfIRCmd_SRem:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);
			if (lhs->getType()->isFloatingPointTy())
				SetResult(curId, mIRBuilder->CreateFRem(lhs, rhs));
			else
				SetResult(curId, mIRBuilder->CreateSRem(lhs, rhs));
		}
		break;
	case BfIRCmd_URem:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);			
			SetResult(curId, mIRBuilder->CreateURem(lhs, rhs));
		}
		break;
	case BfIRCmd_And:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);			
			SetResult(curId, mIRBuilder->CreateAnd(lhs, rhs));
		}
		break;
	case BfIRCmd_Or:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);			
			SetResult(curId, mIRBuilder->CreateOr(lhs, rhs));
		}
		break;
	case BfIRCmd_Xor:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);			
			SetResult(curId, mIRBuilder->CreateXor(lhs, rhs));
		}
		break;
	case BfIRCmd_Shl:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);			
			SetResult(curId, mIRBuilder->CreateShl(lhs, rhs));
		}
		break;
	case BfIRCmd_AShr:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);			
			SetResult(curId, mIRBuilder->CreateAShr(lhs, rhs));
		}
		break;
	case BfIRCmd_LShr:
		{
			CMD_PARAM(llvm::Value*, lhs);
			CMD_PARAM(llvm::Value*, rhs);			
			SetResult(curId, mIRBuilder->CreateLShr(lhs, rhs));
		}
		break;
	case BfIRCmd_Neg:
		{
			CMD_PARAM(llvm::Value*, val);
			if (val->getType()->isFloatingPointTy())
				SetResult(curId, mIRBuilder->CreateFNeg(val));		
			else
				SetResult(curId, mIRBuilder->CreateNeg(val));
		}
		break;
	case BfIRCmd_Not:
		{
			CMD_PARAM(llvm::Value*, val);			
			SetResult(curId, mIRBuilder->CreateNot(val));
		}
		break;
	case BfIRCmd_BitCast:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(llvm::Type*, toType);

			auto fromType = val->getType();
			if ((!fromType->isPointerTy()) || (!toType->isPointerTy()))
			{
				if (fromType->isIntegerTy())
				{
					SetResult(curId, mIRBuilder->CreateIntToPtr(val, toType));
					break;
				}
				SetResult(curId, mIRBuilder->CreatePtrToInt(val, toType));
				break;
			}

			SetResult(curId, mIRBuilder->CreateBitCast(val, toType));
		}
		break;
	case BfIRCmd_PtrToInt:
		{
			CMD_PARAM(llvm::Value*, val);
			auto typeCode = (BfTypeCode)mStream->Read();
			bool isSigned;
			auto llvmType = GetLLVMType(typeCode, isSigned);
			SetResult(curId, mIRBuilder->CreatePtrToInt(val, llvmType));
		}
		break;
	case BfIRCmd_IntToPtr:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(llvm::Type*, toType);
			SetResult(curId, mIRBuilder->CreateIntToPtr(val, toType));
		}
		break;
	case BfIRCmd_InboundsGEP1_32:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(int, idx0);
			SetResult(curId, mIRBuilder->CreateConstInBoundsGEP1_32(NULL, val, idx0));
		}
		break;
	case BfIRCmd_InboundsGEP2_32:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(int, idx0);
			CMD_PARAM(int, idx1);
			SetResult(curId, mIRBuilder->CreateConstInBoundsGEP2_32(NULL, val, idx0, idx1));
		}
		break;
	case BfIRCmd_InBoundsGEP1:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(llvm::Value*, idx0);
			SetResult(curId, mIRBuilder->CreateInBoundsGEP(val, idx0));
		}
		break;
	case BfIRCmd_InBoundsGEP2:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(llvm::Value*, idx0);
			CMD_PARAM(llvm::Value*, idx1);
			llvm::Value* indices[2] = { idx0, idx1 };			
			SetResult(curId, mIRBuilder->CreateInBoundsGEP(val, llvm::makeArrayRef(indices)));
		}
		break;
	case BfIRCmd_IsNull:
		{
			CMD_PARAM(llvm::Value*, val);
			SetResult(curId, mIRBuilder->CreateIsNull(val));
		}
		break;
	case BfIRCmd_IsNotNull:
		{
			CMD_PARAM(llvm::Value*, val);
			SetResult(curId, mIRBuilder->CreateIsNotNull(val));
		}
		break;
	case BfIRCmd_ExtractValue:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(int, idx);
			SetResult(curId, mIRBuilder->CreateExtractValue(val, llvm::makeArrayRef((unsigned)idx)));
		}
		break;
	case BfIRCmd_InsertValue:
		{
			CMD_PARAM(llvm::Value*, agg);
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(int, idx);

			/*if (idx < 0)
			{
				idx = -idx;
				auto elementType = ((llvm::StructType*)agg->getType())->getElementType(idx);
				val = mIRBuilder->CreateBitCast(val, elementType);
			}*/

			SetResult(curId, mIRBuilder->CreateInsertValue(agg, val, llvm::makeArrayRef((unsigned)idx)));
		}
		break;
	case BfIRCmd_Alloca:
		{
			CMD_PARAM(llvm::Type*, type);
			if (type->isStructTy())
			{				
				BF_ASSERT(!((llvm::StructType*)type)->isOpaque());
			}
			
			SetResult(curId, mIRBuilder->CreateAlloca(type));
		}
		break;
	case BfIRCmd_AllocaArray:
		{
			CMD_PARAM(llvm::Type*, type);
			CMD_PARAM(llvm::Value*, arraySize);
			SetResult(curId, mIRBuilder->CreateAlloca(type, arraySize));
		}
		break;
	case BfIRCmd_SetAllocaAlignment:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(int, alignment);
			auto inst = llvm::dyn_cast<llvm::AllocaInst>(val);
			inst->setAlignment(alignment);
		}
		break;
	case BfIRCmd_SetAllocaNoChkStkHint:
		{
			CMD_PARAM(llvm::Value*, val);
			// LLVM does not support this
		}
		break;
	case BfIRCmd_LifetimeStart:
		{
			CMD_PARAM(llvm::Value*, val);
			SetResult(curId, mIRBuilder->CreateLifetimeStart(val));
		}
		break;
	case BfIRCmd_LifetimeEnd:
		{
			CMD_PARAM(llvm::Value*, val);
			SetResult(curId, mIRBuilder->CreateLifetimeEnd(val));
		}
		break;
	case BfIRCmd_LifetimeExtend:
		{
			CMD_PARAM(llvm::Value*, val);			
		}
		break;
	case BfIRCmd_Load:
		{
			CMD_PARAM(llvm::Value*, val);			
			CMD_PARAM(bool, isVolatile);
			SetResult(curId, mIRBuilder->CreateLoad(val, isVolatile));
		}
		break;
	case BfIRCmd_AlignedLoad:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(int, alignment);
			CMD_PARAM(bool, isVolatile);
			SetResult(curId, mIRBuilder->CreateAlignedLoad(val, alignment, isVolatile));
		}
		break;
	case BfIRCmd_Store:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(llvm::Value*, ptr);
			CMD_PARAM(bool, isVolatile);
			SetResult(curId, mIRBuilder->CreateStore(val, ptr, isVolatile));
		}
		break;
	case BfIRCmd_AlignedStore:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(llvm::Value*, ptr);
			CMD_PARAM(int, alignment);
			CMD_PARAM(bool, isVolatile);
			SetResult(curId, mIRBuilder->CreateAlignedStore(val, ptr, alignment, isVolatile));
		}
		break;
	case BfIRCmd_MemSet:
		{
			CMD_PARAM(llvm::Value*, addr);
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(llvm::Value*, size);
			CMD_PARAM(int, alignment);

			CreateMemSet(addr, val, size, alignment);
		}
		break;
	case BfIRCmd_Fence:
		{
			BfIRFenceType fenceType = (BfIRFenceType)mStream->Read();
			if (fenceType == BfIRFenceType_AcquireRelease)
				mIRBuilder->CreateFence(llvm::AtomicOrdering::AcquireRelease);
		}
		break;
	case BfIRCmd_StackSave:
		{
			auto intrin = llvm::Intrinsic::getDeclaration(mLLVMModule, llvm::Intrinsic::stacksave);
			auto callInst = mIRBuilder->CreateCall(intrin);
			SetResult(curId, callInst);
		}
		break;
	case BfIRCmd_StackRestore:
		{
			CMD_PARAM(llvm::Value*, stackVal);
			auto intrin = llvm::Intrinsic::getDeclaration(mLLVMModule, llvm::Intrinsic::stackrestore);
			auto callInst = mIRBuilder->CreateCall(intrin, llvm::SmallVector<llvm::Value*, 1> {stackVal });			
			SetResult(curId, callInst);
		}
		break;
	case BfIRCmd_GlobalVariable:
		{
			CMD_PARAM(llvm::Type*, varType);
			CMD_PARAM(bool, isConstant);
			BfIRLinkageType linkageType = (BfIRLinkageType)mStream->Read();
			CMD_PARAM(llvm::Constant*, initializer);
			CMD_PARAM(String, name);
			CMD_PARAM(bool, isTLS);

			auto globalVariable = new llvm::GlobalVariable(
				*mLLVMModule,
				varType,
				isConstant,
				LLVMMapLinkageType(linkageType),
				initializer,
				name.c_str(), NULL, isTLS ? llvm::GlobalValue::GeneralDynamicTLSModel : llvm::GlobalValue::NotThreadLocal);
			SetResult(curId, globalVariable);
		}
		break;
	case BfIRCmd_GlobalVar_SetUnnamedAddr:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(bool, unnamedAddr);
			((llvm::GlobalVariable*)val)->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
		}
		break;
	case BfIRCmd_GlobalVar_SetInitializer:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(llvm::Constant*, initializer);
			((llvm::GlobalVariable*)val)->setInitializer(initializer);
		}
		break;
	case BfIRCmd_GlobalVar_SetAlignment:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(int, alignment);
			((llvm::GlobalVariable*)val)->setAlignment(alignment);
		}
		break;
	case BfIRCmd_GlobalStringPtr:
		{
			CMD_PARAM(String, str);
			SetResult(curId, mIRBuilder->CreateGlobalStringPtr(llvm::StringRef(str.c_str(), str.length())));
		}
		break;
	case BfIRCmd_CreateBlock:
		{
			CMD_PARAM(String, name);
			CMD_PARAM(bool, addNow);
			auto block = llvm::BasicBlock::Create(*mLLVMContext, name.c_str());
			if (addNow)
				mActiveFunction->getBasicBlockList().push_back(block);
			SetResult(curId, block);
		}
		break;
	case BfIRCmd_MaybeChainNewBlock:
		{
			CMD_PARAM(String, name);
			auto newBlock = mIRBuilder->GetInsertBlock();
			if (!newBlock->empty())
			{
				auto bb = llvm::BasicBlock::Create(*mLLVMContext, name.c_str());
				mIRBuilder->CreateBr(bb);				
				mActiveFunction->getBasicBlockList().push_back(bb);
				mIRBuilder->SetInsertPoint(bb);				
				newBlock = bb;
			}
			SetResult(curId, newBlock);
		}
		break;
	case BfIRCmd_AddBlock:
		{
			CMD_PARAM(llvm::BasicBlock*, block);
			mActiveFunction->getBasicBlockList().push_back(block);
		}
		break;
	case BfIRCmd_DropBlocks:
		{
			CMD_PARAM(llvm::BasicBlock*, startingBlock);
			auto& basicBlockList = mActiveFunction->getBasicBlockList();
			int postExitBlockIdx = -1;

			auto itr = basicBlockList.rbegin();	
			int blockIdx = (int)basicBlockList.size() - 1;
			while (itr != basicBlockList.rend())
			{
				auto& block = *itr++;
				block.dropAllReferences();
				if (&block == startingBlock)
				{
					postExitBlockIdx = blockIdx;
					break;
				}						
				blockIdx--;
			}

			while ((int)basicBlockList.size() > postExitBlockIdx)
			{
				auto& block = basicBlockList.back();		
				block.eraseFromParent();
			}
		}
		break;
	case BfIRCmd_MergeBlockDown:
		{
			CMD_PARAM(llvm::BasicBlock*, fromBlock);
			CMD_PARAM(llvm::BasicBlock*, intoBlock);			
			llvm::BasicBlock::InstListType& fromInstList = fromBlock->getInstList();
			llvm::BasicBlock::InstListType& intoInstList = intoBlock->getInstList();
			intoInstList.splice(intoInstList.begin(), fromInstList, fromInstList.begin(), fromInstList.end());
			fromBlock->eraseFromParent();
		}
		break;	
	case BfIRCmd_SetInsertPoint:
		{			
			CMD_PARAM(llvm::BasicBlock*, block);
			mIRBuilder->SetInsertPoint(block);
		}
		break;
	case BfIRCmd_SetInsertPointAtStart:
		{
			CMD_PARAM(llvm::BasicBlock*, block);
			mIRBuilder->SetInsertPoint(block, block->begin());
		}
		break;
	case BfIRCmd_EraseFromParent:
		{
			CMD_PARAM(llvm::BasicBlock*, block);
			block->eraseFromParent();
		}
		break;
	case BfIRCmd_DeleteBlock:
		{
			CMD_PARAM(llvm::BasicBlock*, block);
			delete block;
		}
		break;	
	case BfIRCmd_EraseInstFromParent:
		{
			CMD_PARAM(llvm::Value*, instVal);
			BF_ASSERT(llvm::isa<llvm::Instruction>(instVal));
			((llvm::Instruction*)instVal)->eraseFromParent();
		}
		break;
	case BfIRCmd_CreateBr:
	case BfIRCmd_CreateBr_NoCollapse:
		{
			CMD_PARAM(llvm::BasicBlock*, block);
			mIRBuilder->CreateBr(block);
		}
		break;
	case BfIRCmd_CreateBr_Fake:
		{
			CMD_PARAM(llvm::BasicBlock*, block);
			// Do nothing
		}
		break;
	case BfIRCmd_CreateCondBr:
		{
			CMD_PARAM(llvm::Value*, condVal);
			CMD_PARAM(llvm::BasicBlock*, trueBlock);
			CMD_PARAM(llvm::BasicBlock*, falseBlock);
			mIRBuilder->CreateCondBr(condVal, trueBlock, falseBlock);
		}
		break;
	case BfIRCmd_MoveBlockToEnd:
		{
			CMD_PARAM(llvm::BasicBlock*, block);
			block->moveAfter(&block->getParent()->getBasicBlockList().back());
		}
		break;
	case BfIRCmd_CreateSwitch:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(llvm::BasicBlock*, dest);
			CMD_PARAM(int, numCases);
			SetResult(curId, mIRBuilder->CreateSwitch(val, dest, numCases));
		}
		break;
	case BfIRCmd_AddSwitchCase:
		{
			CMD_PARAM(llvm::Value*, switchVal);
			CMD_PARAM(llvm::Value*, caseVal);
			CMD_PARAM(llvm::BasicBlock*, caseBlock);
			BF_ASSERT(llvm::isa<llvm::SwitchInst>(switchVal));
			BF_ASSERT(llvm::isa<llvm::ConstantInt>(caseVal));
			((llvm::SwitchInst*)switchVal)->addCase((llvm::ConstantInt*)caseVal, caseBlock);
		}
		break;
	case BfIRCmd_SetSwitchDefaultDest:
		{
			CMD_PARAM(llvm::Value*, switchVal);			
			CMD_PARAM(llvm::BasicBlock*, caseBlock);			
			((llvm::SwitchInst*)switchVal)->setDefaultDest(caseBlock);
		}
		break;
	case BfIRCmd_CreatePhi:
		{
			CMD_PARAM(llvm::Type*, type);
			CMD_PARAM(int, incomingCount);
			SetResult(curId, mIRBuilder->CreatePHI(type, incomingCount));
		}
		break;
	case BfIRCmd_AddPhiIncoming:
		{
			CMD_PARAM(llvm::Value*, phiValue);
			CMD_PARAM(llvm::Value*, value);
			CMD_PARAM(llvm::BasicBlock*, comingFrom);
			BF_ASSERT(llvm::isa<llvm::PHINode>(phiValue));
			((llvm::PHINode*)phiValue)->addIncoming(value, comingFrom);
		}
		break;
	case BfIRCmd_GetIntrinsic:
		{
			CMD_PARAM(int, intrinId);
			CMD_PARAM(CmdParamVec<llvm::Type*>, paramTypes);

			bool isFakeIntrinsic = false;
			if ((intrinId >= BfIRIntrinsic_Atomic_FIRST) && (intrinId <= BfIRIntrinsic_Atomic_LAST))
			{
				isFakeIntrinsic = true;
			}
			if (isFakeIntrinsic)
			{				
				BfIRCodeGenEntry entry;
				entry.mKind = BfIRCodeGenEntryKind_FakeIntrinsic;
				entry.mIntrinsic = (BfIRIntrinsic)intrinId;
				mResults.TryAdd(curId, entry);
				break;
			}
			
			llvm::Function* func = NULL;
			llvm::Function** funcPtr = NULL;			
			if (mIntrinsicMap.TryAdd(intrinId, NULL, &funcPtr))
			{
				struct _Intrinsics
				{
					llvm::Intrinsic::ID mID;
					int mArg0;
					int mArg1;
					int mArg2;
				};

				static _Intrinsics intrinsics[] =
				{
					{ (llvm::Intrinsic::ID)-1, -1}, // AtomicAdd,
					{ (llvm::Intrinsic::ID)-1, -1}, // AtomicAnd,
					{ (llvm::Intrinsic::ID)-1, -1}, // AtomicCmpStore,
					{ (llvm::Intrinsic::ID)-1, -1}, // AtomicCmpStore_Weak,
					{ (llvm::Intrinsic::ID)-1, -1}, // AtomicCmpXChg,
					{ (llvm::Intrinsic::ID)-1, -1}, // AtomicFence,
					{ (llvm::Intrinsic::ID)-1, -1}, // AtomicLoad,					
					{ (llvm::Intrinsic::ID)-1, -1}, // AtomicMax,
					{ (llvm::Intrinsic::ID)-1, -1}, // AtomicMin,
					{ (llvm::Intrinsic::ID)-1, -1}, // AtomicNAnd,
					{ (llvm::Intrinsic::ID)-1, -1}, // AtomicOr,
					{ (llvm::Intrinsic::ID)-1, -1}, // AtomicStore,
					{ (llvm::Intrinsic::ID)-1, -1}, // AtomicSub,
					{ (llvm::Intrinsic::ID)-1, -1}, // AtomicUMax,
					{ (llvm::Intrinsic::ID)-1, -1}, // AtomicUMin,
					{ (llvm::Intrinsic::ID)-1, -1}, // AtomicXChg,
					{ (llvm::Intrinsic::ID)-1, -1}, // AtomicXor,
					{ llvm::Intrinsic::bswap, -1},
					{ llvm::Intrinsic::cos, -1},
					{ llvm::Intrinsic::floor, -1},
					{ (llvm::Intrinsic::ID)-1, -1}, // free					
					{ llvm::Intrinsic::log, -1},
					{ llvm::Intrinsic::log10, -1},
					{ llvm::Intrinsic::log2, -1},
					{ (llvm::Intrinsic::ID)-1}, // memset
					{ llvm::Intrinsic::memcpy, 0, 1, 2},
					{ llvm::Intrinsic::memmove, 0, 2},
					{ llvm::Intrinsic::memset, 0, 2},
					{ llvm::Intrinsic::pow, 0, -1},
					{ llvm::Intrinsic::powi, 0, -1},
					{ llvm::Intrinsic::round, 0, -1},
					{ llvm::Intrinsic::sin, 0, -1},
					{ llvm::Intrinsic::sqrt, 0, -1},					
				};
				BF_STATIC_ASSERT(BF_ARRAY_COUNT(intrinsics) == BfIRIntrinsic_COUNT);

				CmdParamVec<llvm::Type*> useParams;
				if (intrinsics[intrinId].mArg0 != -1)
				{
					useParams.push_back(paramTypes[0]);
					if (intrinsics[intrinId].mArg1 != -1)
					{
						useParams.push_back(paramTypes[1]);
						if (intrinsics[intrinId].mArg2 != -1)
						{
							useParams.push_back(paramTypes[2]);
						}
					}
				}

				BF_ASSERT(intrinsics[intrinId].mID != (llvm::Intrinsic::ID) - 1);
				func = llvm::Intrinsic::getDeclaration(mLLVMModule, intrinsics[intrinId].mID, useParams);
				*funcPtr = func;
				mIntrinsicReverseMap[func] = intrinId;				
			}
			else
			{
				func = *funcPtr;
			}
			SetResult(curId, func);			
		}
		break;
	case BfIRCmd_CreateFunctionType:
		{
			CMD_PARAM(llvm::Type*, resultType);
			CMD_PARAM(CmdParamVec<llvm::Type*>, paramTypes);
			CMD_PARAM(bool, isVarArg);
			SetResult(curId, llvm::FunctionType::get(resultType, paramTypes, isVarArg));
		}
		break;
	case BfIRCmd_CreateFunction:
		{
			CMD_PARAM(llvm::FunctionType*, type);
			BfIRLinkageType linkageType = (BfIRLinkageType)mStream->Read();
			CMD_PARAM(String, name);			
			SetResult(curId, llvm::Function::Create(type, LLVMMapLinkageType(linkageType), name.c_str(), mLLVMModule));
		}
		break;
	case BfIRCmd_EnsureFunctionPatchable:
		{			
			int minPatchSize = 5;

			int guessInstBytes = 1; // ret
			guessInstBytes += mActiveFunction->getFunctionType()->getNumParams() * 4;

			if (guessInstBytes < 5)
			{
				for (auto& block : mActiveFunction->getBasicBlockList())
				{
					for (auto& inst : block)
					{
						if (auto loadInst = llvm::dyn_cast<llvm::LoadInst>(&inst))						
							guessInstBytes += 2;
						else if (auto storeInst = llvm::dyn_cast<llvm::StoreInst>(&inst))
							guessInstBytes += 2;
						else if (auto callInst = llvm::dyn_cast<llvm::CallInst>(&inst))
						{
							auto calledValue = callInst->getCalledValue();
							
							if (calledValue == mNopInlineAsm)
								guessInstBytes += 1;
							else if (auto func = llvm::dyn_cast<llvm::Function>(calledValue))
							{
								if (!func->isIntrinsic())
									guessInstBytes += 4;
							}							
							else
								guessInstBytes += 4;
						}

						if (guessInstBytes >= minPatchSize)
							break;
					}
				}
			}

			for (int i = guessInstBytes; i < minPatchSize; i++)
				AddNop();
		}
		break;
	case BfIRCmd_RemapBindFunction:
		{
			CMD_PARAM(llvm::Value*, func);
			// We need to store this value to a data segment so we get a symbol we can remap during hot swap
			//  We actually do this to ensure that we don't bind to the NEW method but rather the old one- so
			//  delegate equality checks still work

			llvm::Function* llvmFunc = llvm::dyn_cast<llvm::Function>(func);

			if (llvmFunc != NULL)
			{
				// I don't know why we mixed in HSPreserveIdx - that causes bound address to change after reloading, basically totally breaking
				//  the whole point of this.
				//String funcName = StrFormat("bf_hs_preserve@%d@%s", mModule->mCompiler->mHSPreserveIdx++, func->getName());
				String funcName = StrFormat("bf_hs_preserve@%s_%s", llvmFunc->getName().data(), mLLVMModule->getName().data());
				llvm::GlobalVariable* globalVariable = mLLVMModule->getGlobalVariable(funcName.c_str());
				if (globalVariable == NULL)
				{
					globalVariable = new llvm::GlobalVariable(*mLLVMModule, func->getType(), true, llvm::GlobalValue::ExternalLinkage, (llvm::Constant*)func, funcName.c_str());
				}

				SetResult(curId, mIRBuilder->CreateLoad(globalVariable));
			}
			else
				SetResult(curId, func);
		}
		break;
	case BfIRCmd_SetActiveFunction:
		{
			CMD_PARAM(llvm::Function*, func);			
			mActiveFunction = func;
		}
		break;
	case BfIRCmd_CreateCall:
		{			
			llvm::Value* func = NULL;
			BfIRCodeGenEntry* codeGenEntry = NULL;
			Read(func, &codeGenEntry);
			CMD_PARAM(CmdParamVec<llvm::Value*>, args);

			if ((func == NULL) && (codeGenEntry != NULL) && (codeGenEntry->mKind == BfIRCodeGenEntryKind_FakeIntrinsic))
			{
				switch (codeGenEntry->mIntrinsic)
				{
				case BfIRIntrinsic_AtomicCmpStore:
				case BfIRIntrinsic_AtomicCmpStore_Weak:
				case BfIRIntrinsic_AtomicCmpXChg:
					{
						auto memoryKindConst = llvm::dyn_cast<llvm::ConstantInt>(args[3]);
						if (memoryKindConst == NULL)
						{
							Fail("Non-constant success ordering on Atomic_CmpXChg");
							break;
						}
						auto memoryKind = (BfIRAtomicOrdering)memoryKindConst->getSExtValue();

						auto successOrdering = llvm::AtomicOrdering::Unordered;
						auto failOrdering = llvm::AtomicOrdering::Unordered;
						switch (memoryKind & BfIRAtomicOrdering_ORDERMASK)
						{						
						case BfIRAtomicOrdering_Acquire:
							successOrdering = llvm::AtomicOrdering::Acquire;
							failOrdering = llvm::AtomicOrdering::Acquire;
							break;
						case BfIRAtomicOrdering_AcqRel:
							successOrdering = llvm::AtomicOrdering::AcquireRelease;
							failOrdering = llvm::AtomicOrdering::Acquire;
							break;
						case BfIRAtomicOrdering_Relaxed:
							successOrdering = llvm::AtomicOrdering::Monotonic;
							failOrdering = llvm::AtomicOrdering::Monotonic;
							break;
						case BfIRAtomicOrdering_Release:
							successOrdering = llvm::AtomicOrdering::Release;
							failOrdering = llvm::AtomicOrdering::Monotonic;
							break;
						case BfIRAtomicOrdering_SeqCst:
							successOrdering = llvm::AtomicOrdering::SequentiallyConsistent;
							failOrdering = llvm::AtomicOrdering::SequentiallyConsistent;
							break;
						default:
							Fail("Invalid success ordering on Atomic_CmpXChg");
							break;
						}

						if (args.size() >= 5)
						{
							auto memoryKindConst = llvm::dyn_cast<llvm::ConstantInt>(args[4]);
							if (memoryKindConst == NULL)
							{
								Fail("Non-constant fail ordering on Atomic_CmpXChg");
								break;
							}
							auto memoryKind = (BfIRAtomicOrdering)memoryKindConst->getSExtValue();
							switch (memoryKind & BfIRAtomicOrdering_ORDERMASK)
							{							
							case BfIRAtomicOrdering_Acquire:								
								failOrdering = llvm::AtomicOrdering::Acquire;
								break;							
							case BfIRAtomicOrdering_Relaxed:								
								failOrdering = llvm::AtomicOrdering::Monotonic;
								break;							
							case BfIRAtomicOrdering_SeqCst:								
								failOrdering = llvm::AtomicOrdering::SequentiallyConsistent;
								break;
							default:
								Fail("Invalid fail ordering on Atomic_CmpXChg");
								break;
							}
						}

						auto inst = mIRBuilder->CreateAtomicCmpXchg(args[0], args[1], args[2], successOrdering, failOrdering);
						if (codeGenEntry->mIntrinsic == BfIRIntrinsic_AtomicCmpStore_Weak)
							inst->setWeak(true);
						if ((memoryKind & BfIRAtomicOrdering_Volatile) != 0)
							inst->setVolatile(true);
						if (codeGenEntry->mIntrinsic == BfIRIntrinsic_AtomicCmpXChg)
						{
							auto prevVal = mIRBuilder->CreateExtractValue(inst, 0);
							SetResult(curId, prevVal);
						}
						else
						{
							auto successVal = mIRBuilder->CreateExtractValue(inst, 1);
							SetResult(curId, successVal);
						}						
					}
					break;
				case BfIRIntrinsic_AtomicFence:
					{
						if (args.size() == 0)
						{
							if ((mTargetTriple.GetMachineType() != BfMachineType_x86) && (mTargetTriple.GetMachineType() != BfMachineType_x64))
							{
								Fail("Unable to create compiler barrier on this platform");
							}
							else
							{
								// Compiler barrier

								llvm::SmallVector<llvm::Type*, 8> paramTypes;
								llvm::FunctionType* funcType = llvm::FunctionType::get(llvm::Type::getVoidTy(*mLLVMContext), paramTypes, false);
								auto fenceFunc = llvm::InlineAsm::get(funcType,
									"", "~{memory},~{dirflag},~{fpsr},~{flags}", true, false, llvm::InlineAsm::AD_ATT);
								mIRBuilder->CreateCall(fenceFunc);
							}
							break;
						}

						auto memoryKindConst = llvm::dyn_cast<llvm::ConstantInt>(args[0]);
						if (memoryKindConst == NULL)
						{
							Fail("Non-constant success ordering on AtomicFence");
							break;
						}

						auto memoryKind = (BfIRAtomicOrdering)memoryKindConst->getSExtValue();
						auto ordering = llvm::AtomicOrdering::SequentiallyConsistent;
						switch (memoryKind & BfIRAtomicOrdering_ORDERMASK)
						{
						case BfIRAtomicOrdering_Acquire:
							ordering = llvm::AtomicOrdering::Acquire;
							break;
						case BfIRAtomicOrdering_AcqRel:
							ordering = llvm::AtomicOrdering::AcquireRelease;
							break;						
						case BfIRAtomicOrdering_Release:
							ordering = llvm::AtomicOrdering::Release;
							break;
						case BfIRAtomicOrdering_SeqCst:
							ordering = llvm::AtomicOrdering::SequentiallyConsistent;
							break;
						default:
							Fail("Invalid ordering on atomic operation");
							break;
						}

						mIRBuilder->CreateFence(ordering);
					}
					break;
				case BfIRIntrinsic_AtomicLoad:
					{
						auto memoryKindConst = llvm::dyn_cast<llvm::ConstantInt>(args[1]);
						if (memoryKindConst == NULL)
						{
							Fail("Non-constant success ordering on AtomicLoad");
							break;
						}						
						auto memoryKind = (BfIRAtomicOrdering)memoryKindConst->getSExtValue();
						auto ptrType = llvm::dyn_cast<llvm::PointerType>(args[0]->getType());						
						auto loadInst = mIRBuilder->CreateAlignedLoad(args[0], ptrType->getElementType()->getPrimitiveSizeInBits() / 8);
						switch (memoryKind & BfIRAtomicOrdering_ORDERMASK)
						{
						case BfIRAtomicOrdering_Acquire:
							loadInst->setAtomic(llvm::AtomicOrdering::Acquire);
							break;
						case BfIRAtomicOrdering_Relaxed:
							loadInst->setAtomic(llvm::AtomicOrdering::Monotonic);
							break;
						case BfIRAtomicOrdering_SeqCst:
							loadInst->setAtomic(llvm::AtomicOrdering::SequentiallyConsistent);
							break;
						default:
							BF_FATAL("BadAtomic");
						}
						if ((memoryKind & BfIRAtomicOrdering_Volatile) != 0)
							loadInst->setVolatile(true);
						SetResult(curId, loadInst);
					}
					break;
				case BfIRIntrinsic_AtomicStore:														
					{							
						auto memoryKindConst = llvm::dyn_cast<llvm::ConstantInt>(args[1]);
						if (memoryKindConst == NULL)
						{
							Fail("Non-constant success ordering on AtomicLoad");
							break;
						}
						auto memoryKind = (BfIRAtomicOrdering)memoryKindConst->getSExtValue();

						auto storeInst = mIRBuilder->CreateAlignedStore(args[1], args[0], args[1]->getType()->getPrimitiveSizeInBits()/8);
						switch (memoryKind & BfIRAtomicOrdering_ORDERMASK)
						{
						case BfIRAtomicOrdering_Relaxed:
							storeInst->setAtomic(llvm::AtomicOrdering::Monotonic);
							break;
						case BfIRAtomicOrdering_Release:
							storeInst->setAtomic(llvm::AtomicOrdering::Release);
							break;
						case BfIRAtomicOrdering_SeqCst:
							storeInst->setAtomic(llvm::AtomicOrdering::SequentiallyConsistent);
							break;
						}
						if ((memoryKind & BfIRAtomicOrdering_Volatile) != 0)
							storeInst->setVolatile(true);
						SetResult(curId, storeInst);
					}
					break;
				case BfIRIntrinsic_AtomicAdd:				
				case BfIRIntrinsic_AtomicAnd:
				case BfIRIntrinsic_AtomicMax:
				case BfIRIntrinsic_AtomicMin:
				case BfIRIntrinsic_AtomicNAnd:
				case BfIRIntrinsic_AtomicOr:
				case BfIRIntrinsic_AtomicSub:					
				case BfIRIntrinsic_AtomicUMax:					
				case BfIRIntrinsic_AtomicUMin:					
				case BfIRIntrinsic_AtomicXChg:
				case BfIRIntrinsic_AtomicXor:
					{
						bool isFloat = args[1]->getType()->isFloatingPointTy();

						auto op = llvm::AtomicRMWInst::BinOp::Add;
						switch (codeGenEntry->mIntrinsic)
						{
						case BfIRIntrinsic_AtomicAdd:							
							op = llvm::AtomicRMWInst::BinOp::Add;
							break;
						case BfIRIntrinsic_AtomicAnd:
							op = llvm::AtomicRMWInst::BinOp::And;
							break;
						case BfIRIntrinsic_AtomicMax:							
							op = llvm::AtomicRMWInst::BinOp::Max;
							break;
						case BfIRIntrinsic_AtomicMin:
							op = llvm::AtomicRMWInst::BinOp::Min;
							break;
						case BfIRIntrinsic_AtomicNAnd:
							op = llvm::AtomicRMWInst::BinOp::Nand;
							break;
						case BfIRIntrinsic_AtomicOr:
							op = llvm::AtomicRMWInst::BinOp::Or;
							break;
						case BfIRIntrinsic_AtomicSub:
							op = llvm::AtomicRMWInst::BinOp::Sub;
							break;
						case BfIRIntrinsic_AtomicUMax:
							op = llvm::AtomicRMWInst::BinOp::UMax;
							break;
						case BfIRIntrinsic_AtomicUMin:
							op = llvm::AtomicRMWInst::BinOp::UMin;
							break;
						case BfIRIntrinsic_AtomicXChg:
							op = llvm::AtomicRMWInst::BinOp::Xchg;
							break;
						case BfIRIntrinsic_AtomicXor:
							op = llvm::AtomicRMWInst::BinOp::Xor;
							break;
						default: break;
						}						

						auto memoryKindConst = llvm::dyn_cast<llvm::ConstantInt>(args[2]);
						if (memoryKindConst == NULL)
						{
							Fail("Non-constant ordering on atomic operation");
							break;
						}

						auto memoryKind = (BfIRAtomicOrdering)memoryKindConst->getSExtValue();
						auto ordering = llvm::AtomicOrdering::Unordered;
						switch (memoryKind & BfIRAtomicOrdering_ORDERMASK)
						{
						case BfIRAtomicOrdering_Acquire:
							ordering = llvm::AtomicOrdering::Acquire;							
							break;
						case BfIRAtomicOrdering_AcqRel:
							ordering = llvm::AtomicOrdering::AcquireRelease;							
							break;
						case BfIRAtomicOrdering_Relaxed:
							ordering = llvm::AtomicOrdering::Monotonic;							
							break;
						case BfIRAtomicOrdering_Release:
							ordering = llvm::AtomicOrdering::Release;							
							break;
						case BfIRAtomicOrdering_SeqCst:
							ordering = llvm::AtomicOrdering::SequentiallyConsistent;							
							break;
						default:
							Fail("Invalid ordering on atomic operation");
							break;
						}
												
						auto atomicRMW = mIRBuilder->CreateAtomicRMW(op, args[0], args[1], ordering);
						if ((memoryKind & BfIRAtomicOrdering_Volatile) != 0)
							atomicRMW->setVolatile(true);
						llvm::Value* result = atomicRMW;
						if ((memoryKind & BfIRAtomicOrdering_ReturnModified) != 0)
						{
							switch (codeGenEntry->mIntrinsic)
							{
							case BfIRIntrinsic_AtomicAdd:
								if (isFloat)
									result = mIRBuilder->CreateFAdd(atomicRMW, args[1]);
								else
									result = mIRBuilder->CreateAdd(atomicRMW, args[1]);
								break;
							case BfIRIntrinsic_AtomicAnd:
								result = mIRBuilder->CreateAnd(atomicRMW, args[1]);
								break;
							case BfIRIntrinsic_AtomicMax:
							case BfIRIntrinsic_AtomicMin:
							case BfIRIntrinsic_AtomicUMax:
							case BfIRIntrinsic_AtomicUMin:
								{
									llvm::Value* cmpVal = NULL;
									switch (codeGenEntry->mIntrinsic)
									{
									case BfIRIntrinsic_AtomicMax:
										if (isFloat)
											cmpVal = mIRBuilder->CreateFCmpOGE(atomicRMW, args[1]);
										else
											cmpVal = mIRBuilder->CreateICmpSGE(atomicRMW, args[1]);
										break;
									case BfIRIntrinsic_AtomicMin:
										if (isFloat)
											cmpVal = mIRBuilder->CreateFCmpOLE(atomicRMW, args[1]);
										else
											cmpVal = mIRBuilder->CreateICmpSLE(atomicRMW, args[1]);
										break;
									case BfIRIntrinsic_AtomicUMax:
										cmpVal = mIRBuilder->CreateICmpUGE(atomicRMW, args[1]);
										break;
									case BfIRIntrinsic_AtomicUMin:
										cmpVal = mIRBuilder->CreateICmpULE(atomicRMW, args[1]);
										break;
									default: break;
									}
									result = mIRBuilder->CreateSelect(cmpVal, atomicRMW, args[1]);
								}
								break;																							
							case BfIRIntrinsic_AtomicNAnd:
								result = mIRBuilder->CreateAnd(atomicRMW, args[1]);
								result = mIRBuilder->CreateNot(result);
								break;
							case BfIRIntrinsic_AtomicOr:
								result = mIRBuilder->CreateOr(atomicRMW, args[1]);
								break;
							case BfIRIntrinsic_AtomicSub:
								if (isFloat)
									result = mIRBuilder->CreateFSub(atomicRMW, args[1]);
								else
									result = mIRBuilder->CreateSub(atomicRMW, args[1]);
								break;
							case BfIRIntrinsic_AtomicXor:
								result = mIRBuilder->CreateXor(atomicRMW, args[1]);
								break;
							case BfIRIntrinsic_AtomicXChg:
								result = args[1];
								break;
							default: break;
							}
						}
						SetResult(curId, result);
					}
					break;
				default:
					Fail("Unhandled intrinsic");
				}
				break;
			}

			//mIRBuilder->CreateAtomicCmpXchg();

			if (auto funcPtr = llvm::dyn_cast<llvm::Function>(func))
			{
				int intrinId = -1;
				if (mIntrinsicReverseMap.TryGetValue(funcPtr, &intrinId))
				{
					if (intrinId == BfIRIntrinsic_MemSet)
					{
						int align = 1;

						BF_ASSERT(args.size() == 5);
						auto alignConst = llvm::dyn_cast<llvm::ConstantInt>(args[3]);					
						if (alignConst != NULL)
							align = (int)alignConst->getSExtValue();						
						bool isVolatile = false;
						auto volatileConst = llvm::dyn_cast<llvm::ConstantInt>(args[4]);
						if ((volatileConst != NULL) && (volatileConst->getSExtValue() != 0))
							isVolatile = true;
						CreateMemSet(args[0], args[1], args[2], align, isVolatile);						
						break;				
					}
					else if ((intrinId == BfIRIntrinsic_MemCpy) || (intrinId == BfIRIntrinsic_MemMove))
					{
						int align = 1;

						BF_ASSERT(args.size() == 5);
						auto alignConst = llvm::dyn_cast<llvm::ConstantInt>(args[3]);						
						if (alignConst != NULL)
							align = (int)alignConst->getSExtValue();
						bool isVolatile = false;
						auto volatileConst = llvm::dyn_cast<llvm::ConstantInt>(args[4]);
						if ((volatileConst != NULL) && (volatileConst->getSExtValue() != 0))
							isVolatile = true;
						if (intrinId == BfIRIntrinsic_MemCpy)
							mIRBuilder->CreateMemCpy(args[0], align, args[1], align, args[2], isVolatile);
						else
							mIRBuilder->CreateMemMove(args[0], align, args[1], align, args[2], isVolatile);
						break;
					}					
				}
			}

            llvm::Value* val0 = NULL;
            llvm::Value* val1 = NULL;
            if (args.size() > 0)
            {
                val0 = args[0];
            }
            if (args.size() > 1)
            {
                val1 = args[1];
            }

			SetResult(curId, mIRBuilder->CreateCall(func, args));
		}
		break;
	case BfIRCmd_SetCallCallingConv:
		{
			CMD_PARAM(llvm::Value*, callInst);
			BfIRCallingConv callingConv = (BfIRCallingConv)mStream->Read();
			BF_ASSERT(llvm::isa<llvm::CallInst>(callInst));
			((llvm::CallInst*)callInst)->setCallingConv(GetLLVMCallingConv(callingConv));
		}
		break;
	case BfIRCmd_SetFuncCallingConv:
		{
			CMD_PARAM(llvm::Function*, func);
			BfIRCallingConv callingConv = (BfIRCallingConv)mStream->Read();			
			((llvm::Function*)func)->setCallingConv(GetLLVMCallingConv(callingConv));
		}
		break;
	case BfIRCmd_SetTailCall:
		{
			CMD_PARAM(llvm::Value*, callInst);
			BF_ASSERT(llvm::isa<llvm::CallInst>(callInst));
			((llvm::CallInst*)callInst)->setTailCall();
		}
		break;
	case BfIRCmd_SetCallAttribute:
		{
			CMD_PARAM(llvm::Value*, callInst);	
			CMD_PARAM(int, paramIdx);
			BfIRAttribute attribute = (BfIRAttribute)mStream->Read();
			BF_ASSERT(llvm::isa<llvm::CallInst>(callInst));					
			llvm::Attribute::AttrKind attr = llvm::Attribute::None;
			if (attribute == BfIRAttribute_NoReturn)
				attr = llvm::Attribute::NoReturn;
			((llvm::CallInst*)callInst)->addAttribute(paramIdx, attr);
		}
		break;
	case BfIRCmd_CreateRet:
		{
			CMD_PARAM(llvm::Value*, val);
			SetResult(curId, mIRBuilder->CreateRet(val));
		}
		break;
	case BfIRCmd_CreateRetVoid:
		{
			mIRBuilder->CreateRetVoid();
		}
		break;
	case BfIRCmd_CreateUnreachable:
		{
			mIRBuilder->CreateUnreachable();
		}
		break;
	case BfIRCmd_Call_AddAttribute:
		{
			CMD_PARAM(llvm::Value*, callInst);
			CMD_PARAM(int, argIdx);
			BfIRAttribute attribute = (BfIRAttribute)mStream->Read();
			BF_ASSERT(llvm::isa<llvm::CallInst>(callInst));
			((llvm::CallInst*)callInst)->addAttribute(argIdx, LLVMMapAttribute(attribute));
		}
		break;
	case BfIRCmd_Call_AddAttribute1:
		{
			CMD_PARAM(llvm::Value*, inst);
			CMD_PARAM(int, argIdx);
			BfIRAttribute attribute = (BfIRAttribute)mStream->Read();
			CMD_PARAM(int, arg);
			auto callInst = llvm::dyn_cast<llvm::CallInst>(inst);
			if (callInst != NULL)
			{
				if (attribute == BfIRAttribute_Dereferencable)
				{
					((llvm::CallInst*)callInst)->addDereferenceableAttr(argIdx, arg);
				}
			}
		}
		break;
	case BfIRCmd_Func_AddAttribute:
		{
			CMD_PARAM(llvm::Function*, func);
			CMD_PARAM(int, argIdx);
			BfIRAttribute attribute = (BfIRAttribute)mStream->Read();			
			if (attribute == BFIRAttribute_DllImport)
			{
				func->setDLLStorageClass(llvm::GlobalValue::DLLImportStorageClass);
			}
			else if (attribute == BFIRAttribute_DllExport)
			{
				func->setDLLStorageClass(llvm::GlobalValue::DLLExportStorageClass);
			}
			else if (attribute == BFIRAttribute_NoFramePointerElim)
			{
				func->addFnAttr("no-frame-pointer-elim", "true");
			}
			else
				func->addAttribute(argIdx, LLVMMapAttribute(attribute));
		}
		break;
	case BfIRCmd_Func_AddAttribute1:
		{
			CMD_PARAM(llvm::Function*, func);
			CMD_PARAM(int, argIdx);
			BfIRAttribute attribute = (BfIRAttribute)mStream->Read();
			CMD_PARAM(int, arg);			
			if (attribute == BfIRAttribute_Dereferencable)
			{
				((llvm::Function*)func)->addDereferenceableAttr(argIdx, arg);		
			}
		}
		break;
	case BfIRCmd_Func_SetParamName:
		{
			CMD_PARAM(llvm::Function*, func);
			CMD_PARAM(int, argIdx);
			CMD_PARAM(String, name);

			auto argItr = ((llvm::Function*)func)->arg_begin();
			for (int i = 1; i < argIdx; i++)
				++argItr;
			argItr->setName(name.c_str());
		}
		break;		
	case BfIRCmd_Func_DeleteBody:
		{
			CMD_PARAM(llvm::Function*, func);
			BF_ASSERT(llvm::isa<llvm::Function>(func));
			((llvm::Function*)func)->deleteBody();
		}
		break;
	case BfIRCmd_Func_SetLinkage:
		{
			CMD_PARAM(llvm::Function*, func);
			BfIRLinkageType linkageType = (BfIRLinkageType)mStream->Read();			
			((llvm::Function*)func)->setLinkage(LLVMMapLinkageType(linkageType));
		}
		break;
	case BfIRCmd_SaveDebugLocation:
		{
			mSavedDebugLocs.push_back(mIRBuilder->getCurrentDebugLocation());
		}
		break;
	case BfIRCmd_RestoreDebugLocation:
		{
			mDebugLoc = mSavedDebugLocs[mSavedDebugLocs.size() - 1];
			mIRBuilder->SetCurrentDebugLocation(mDebugLoc);
			mSavedDebugLocs.pop_back();
		}
		break;
	case BfIRCmd_ClearDebugLocation:
		{
			mDebugLoc = llvm::DebugLoc();
			mIRBuilder->SetCurrentDebugLocation(llvm::DebugLoc());
		}
		break;
	case BfIRCmd_ClearDebugLocationInst:
		{
			CMD_PARAM(llvm::Value*, instValue);
			BF_ASSERT(llvm::isa<llvm::Instruction>(instValue));
			((llvm::Instruction*)instValue)->setDebugLoc(llvm::DebugLoc());
		}
		break;
	case BfIRCmd_ClearDebugLocationInstLast:
		{
			llvm::BasicBlock* bb = mIRBuilder->GetInsertBlock();
			if (bb != NULL)
			{
				auto& instList = bb->getInstList();
				if (!instList.empty())
				{
					auto& inst = instList.back();
					inst.setDebugLoc(llvm::DebugLoc());
				}
			}
		}
		break;
	case BfIRCmd_UpdateDebugLocation:
		{
			CMD_PARAM(llvm::Value*, instValue);
			BF_ASSERT(llvm::isa<llvm::Instruction>(instValue));
			((llvm::Instruction*)instValue)->setDebugLoc(mIRBuilder->getCurrentDebugLocation());
		}
		break;
	case BfIRCmd_SetCurrentDebugLocation:
		{
			CMD_PARAM(int, line);
			CMD_PARAM(int, column);
			CMD_PARAM(llvm::MDNode*, diScope);
			CMD_PARAM(llvm::MDNode*, diInlinedAt);
			mDebugLoc = llvm::DebugLoc::get(line, column, diScope, diInlinedAt);			
		}
		break;
	case BfIRCmd_Nop:
	case BfIRCmd_EnsureInstructionAt:		
		AddNop();
		break;
	case BfIRCmd_StatementStart:
		// We only commit the debug loc for statement starts
		mIRBuilder->SetCurrentDebugLocation(mDebugLoc);
		mHasDebugLoc = true;
		break;
	case BfIRCmd_ObjectAccessCheck:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(bool, useAsm);
			auto curLLVMFunc = mActiveFunction;
			auto irBuilder = mIRBuilder;

			if ((mTargetTriple.GetMachineType() != BfMachineType_x86) && (mTargetTriple.GetMachineType() != BfMachineType_x64))
				useAsm = false;

			if (!useAsm)
			{
				// This is generates slower code than the inline asm in debug mode, but can optimize well in release
				auto int8Ty = llvm::Type::getInt8Ty(*mLLVMContext);			
				auto int8Ptr = irBuilder->CreateBitCast(val, int8Ty->getPointerTo());
				auto int8Val = irBuilder->CreateLoad(int8Ptr);
				auto cmpResult = irBuilder->CreateICmpUGE(int8Val, llvm::ConstantInt::get(int8Ty, 0x80));

				auto failBB = llvm::BasicBlock::Create(*mLLVMContext, "access.fail");
				auto passBB = llvm::BasicBlock::Create(*mLLVMContext, "access.pass");

				irBuilder->CreateCondBr(cmpResult, failBB, passBB);

				curLLVMFunc->getBasicBlockList().push_back(failBB);
				irBuilder->SetInsertPoint(failBB);				

				auto trapDecl = llvm::Intrinsic::getDeclaration(mLLVMModule, llvm::Intrinsic::trap);		
				auto callInst = irBuilder->CreateCall(trapDecl);
				callInst->addAttribute(llvm::AttributeList::FunctionIndex, llvm::Attribute::NoReturn);
				irBuilder->CreateBr(passBB);

				curLLVMFunc->getBasicBlockList().push_back(passBB);
				irBuilder->SetInsertPoint(passBB);

				SetResult(curId, passBB);
			}
			else
			{
				llvm::Type* voidPtrType = llvm::Type::getInt8PtrTy(*mLLVMContext);
				if (mAsmObjectCheckAsm == NULL)
				{
					std::vector<llvm::Type*> paramTypes;
					paramTypes.push_back(voidPtrType);
					auto funcType = llvm::FunctionType::get(llvm::Type::getVoidTy(*mLLVMContext), paramTypes, false);

					String asmStr =
						"cmpb $$128, ($0)\n"
						"jb 1f\n"
						"int $$3\n"
						"1:";

					mAsmObjectCheckAsm = llvm::InlineAsm::get(funcType,
						asmStr.c_str(), "r,~{dirflag},~{fpsr},~{flags}", true,
						false, llvm::InlineAsm::AD_ATT);
				}

				llvm::SmallVector<llvm::Value*, 1> llvmArgs;
				llvmArgs.push_back(mIRBuilder->CreateBitCast(val, voidPtrType));

				llvm::CallInst* callInst = irBuilder->CreateCall(mAsmObjectCheckAsm, llvmArgs);
				callInst->addAttribute(llvm::AttributeList::FunctionIndex, llvm::Attribute::NoUnwind);

				SetResult(curId, mIRBuilder->GetInsertBlock());
			}			
		}
		break;
	case BfIRCmd_DbgInit:
		{
			mDIBuilder = new llvm::DIBuilder(*mLLVMModule);			
		}
		break;
	case BfIRCmd_DbgFinalize:
		{
			for (auto& typeEntryPair : mTypes)
			{
				auto& typeEntry = typeEntryPair.mValue;
				if (typeEntry.mInstDIType != NULL)
					typeEntry.mInstDIType->resolveCycles();
			}
			mDIBuilder->finalize();
		}
		break;
	case BfIRCmd_DbgCreateCompileUnit:
		{
			CMD_PARAM(int, lang);
			CMD_PARAM(String, fileName);
			CMD_PARAM(String, directory);
			CMD_PARAM(String, producer);
			CMD_PARAM(bool, isOptimized);
			CMD_PARAM(String, flags);
			CMD_PARAM(int, runtimeVer);
			CMD_PARAM(bool, linesOnly);

			auto diFile = mDIBuilder->createFile(fileName.c_str(), directory.c_str());
			mDICompileUnit = mDIBuilder->createCompileUnit(lang, diFile, producer.c_str(), isOptimized, flags.c_str(), runtimeVer, "", linesOnly ? llvm::DICompileUnit::LineTablesOnly : llvm::DICompileUnit::FullDebug);
			SetResult(curId, mDICompileUnit);
		}
		break;
	case BfIRCmd_DbgCreateFile:
		{
			CMD_PARAM(String, fileName);
			CMD_PARAM(String, directory);
			SetResult(curId, mDIBuilder->createFile(fileName.c_str(), directory.c_str()));
		}
		break;
	case BfIRCmd_ConstValueI64:
		{
			CMD_PARAM(int64, val);
			SetResult(curId, mDIBuilder->createConstantValueExpression((uint64)val));
		}
		break;
	case BfIRCmd_DbgGetCurrentLocation:
		{			
			SetResult(curId, mIRBuilder->getCurrentDebugLocation());
		}
		break;
	case BfIRCmd_DbgSetType:
		{
			CMD_PARAM(int, typeId);
			CMD_PARAM(llvm::MDNode*, type);
			GetTypeEntry(typeId).mDIType = (llvm::DIType*)type;
		}
		break;
	case BfIRCmd_DbgSetInstType:
		{
			CMD_PARAM(int, typeId);
			CMD_PARAM(llvm::MDNode*, type);
			GetTypeEntry(typeId).mInstDIType = (llvm::DIType*)type;
		}
		break;
	case BfIRCmd_DbgGetType:
		{
			CMD_PARAM(int, typeId);
			SetResult(curId, GetTypeEntry(typeId).mDIType);
		}
		break;
	case BfIRCmd_DbgGetTypeInst:
		{
			CMD_PARAM(int, typeId);
			SetResult(curId, GetTypeEntry(typeId).mInstDIType);
		}
		break;
	case BfIRCmd_DbgTrackDITypes:
		{
            CMD_PARAM(int, typeId);
			auto& typeEntry = GetTypeEntry(typeId);

            if (typeEntry.mDIType != NULL)
				llvm::MetadataTracking::track(*(llvm::Metadata**)&typeEntry.mDIType);
			if (typeEntry.mInstDIType != NULL)
                llvm::MetadataTracking::track(*(llvm::Metadata**)&typeEntry.mInstDIType);
		}
		break;
	case BfIRCmd_DbgCreateNamespace:
		{
			CMD_PARAM(llvm::MDNode*, scope);
			CMD_PARAM(String, name);
			CMD_PARAM(llvm::MDNode*, file);
			CMD_PARAM(int, lineNum);
			BF_ASSERT(file != NULL);
			SetResult(curId, mDIBuilder->createNameSpace((llvm::DIScope*)scope, name.c_str(), true));
		}
		break;
	case BfIRCmd_DbgCreateImportedModule:
		{
			CMD_PARAM(llvm::MDNode*, context);
			CMD_PARAM(llvm::MDNode*, namespaceNode);
			CMD_PARAM(int, lineNum);
			//SetResult(curId, mDIBuilder->createImportedModule((llvm::DIScope*)context, (llvm::DINamespace*)namespaceNode, lineNum));
		}
		break;
	case BfIRCmd_DbgCreateBasicType:
		{
			CMD_PARAM(String, name);
			CMD_PARAM(int64, sizeInBits);
			CMD_PARAM(int64, alignInBits);
			CMD_PARAM(int, encoding);
			SetResult(curId, mDIBuilder->createBasicType(name.c_str(), sizeInBits, encoding));
		}
		break;
	case BfIRCmd_DbgCreateStructType:
		{
			CMD_PARAM(llvm::MDNode*, context);
			CMD_PARAM(String, name);
			CMD_PARAM(llvm::MDNode*, file);
			CMD_PARAM(int, lineNum);
			CMD_PARAM(int64, sizeInBits);
			CMD_PARAM(int64, alignInBits);
			CMD_PARAM(int, flags);
			CMD_PARAM(llvm::MDNode*, derivedFrom);
			CMD_PARAM(CmdParamVec<llvm::Metadata*>, members);
			auto diMembersArray = mDIBuilder->getOrCreateArray(members);
			BF_ASSERT(file != NULL);
			llvm::DINode::DIFlags diFlags = (llvm::DINode::DIFlags)flags;
            auto mdStruct = mDIBuilder->createStructType((llvm::DIScope*)context, name.c_str(), (llvm::DIFile*)file, lineNum, sizeInBits, (uint32)alignInBits, diFlags, (llvm::DIType*)derivedFrom, diMembersArray);
            SetResult(curId, mdStruct);

            //OutputDebugStrF("BfIRCmd_DbgCreateStructType %p\n", mdStruct);
		}
		break;	
	case BfIRCmd_DbgCreateEnumerationType:
		{
			CMD_PARAM(llvm::MDNode*, context);
			CMD_PARAM(String, name);
			CMD_PARAM(llvm::MDNode*, file);
			CMD_PARAM(int, lineNum);
			CMD_PARAM(int64, sizeInBits);
			CMD_PARAM(int64, alignInBits);								
			CMD_PARAM(CmdParamVec<llvm::Metadata*>, members);
			CMD_PARAM(llvm::MDNode*, underlyingType);
			auto diMembersArray = mDIBuilder->getOrCreateArray(members);

			/*static int typeIdx = 0;
			if (name == "TypeCode")
				name += StrFormat("_%d", typeIdx);
			typeIdx++;*/

			BF_ASSERT(file != NULL);
			auto enumType = mDIBuilder->createEnumerationType((llvm::DIScope*)context, name.c_str(), (llvm::DIFile*)file, lineNum, sizeInBits, (uint32)alignInBits, diMembersArray, (llvm::DIType*)underlyingType);
			SetResult(curId, enumType);

            //OutputDebugStrF("BfIRCmd_DbgCreateEnumerationType %p\n", enumType);
		}
		break;
	case BfIRCmd_DbgCreatePointerType:
		{
			CMD_PARAM(llvm::MDNode*, diType);			
			SetResult(curId, mDIBuilder->createPointerType((llvm::DIType*)diType, mPtrSize*8, (uint32)mPtrSize * 8));
		}
		break;
	case BfIRCmd_DbgCreateReferenceType:
		{
			CMD_PARAM(llvm::MDNode*, diType);
			SetResult(curId, mDIBuilder->createReferenceType(llvm::dwarf::DW_TAG_reference_type, (llvm::DIType*)diType));
		}
		break;
	case BfIRCmd_DbgCreateConstType:
		{
			CMD_PARAM(llvm::MDNode*, diType);
			SetResult(curId, mDIBuilder->createQualifiedType(llvm::dwarf::DW_TAG_const_type, (llvm::DIType*)diType));
		}
		break;
	case BfIRCmd_DbgCreateArtificialType:
		{
			CMD_PARAM(llvm::MDNode*, diType);
			SetResult(curId, mDIBuilder->createArtificialType((llvm::DIType*)diType));
		}
		break;
	case BfIRCmd_DbgCreateArrayType:
		{
			CMD_PARAM(int64, sizeInBits);
			CMD_PARAM(int64, alignInBits);
			CMD_PARAM(llvm::MDNode*, elementType);
			CMD_PARAM(int64, numElements);
			
			llvm::SmallVector<llvm::Metadata*, 1> diSizeVec;
			diSizeVec.push_back(mDIBuilder->getOrCreateSubrange(0, numElements));
			auto diSizeArray = mDIBuilder->getOrCreateArray(diSizeVec);
			SetResult(curId, mDIBuilder->createArrayType(sizeInBits, (uint32)alignInBits, (llvm::DIType*)elementType, diSizeArray));
		}
		break;
	case BfIRCmd_DbgCreateReplaceableCompositeType:
		{
			CMD_PARAM(int, tag);
			CMD_PARAM(String, name);
			CMD_PARAM(llvm::MDNode*, scope);
			CMD_PARAM(llvm::MDNode*, file);
			CMD_PARAM(int, line);
			CMD_PARAM(int64, sizeInBits);
			CMD_PARAM(int64, alignInBits);
			CMD_PARAM(int, flags);
			BF_ASSERT(file != NULL);
			llvm::DINode::DIFlags diFlags = (llvm::DINode::DIFlags)flags;
			SetResult(curId, mDIBuilder->createReplaceableCompositeType(tag, name.c_str(), (llvm::DIScope*)scope, (llvm::DIFile*)file, line, 0, sizeInBits, (uint32)alignInBits, diFlags));
		}
		break;
	case BfIRCmd_DbgCreateForwardDecl:
		{
			CMD_PARAM(int, tag);
			CMD_PARAM(String, name);
			CMD_PARAM(llvm::MDNode*, scope);
			CMD_PARAM(llvm::MDNode*, file);
			CMD_PARAM(int, line);
			BF_ASSERT(file != NULL);

			auto diType = mDIBuilder->createForwardDecl(tag, name.c_str(), (llvm::DIScope*)scope, (llvm::DIFile*)file, line);
			SetResult(curId, diType);
		}
		break;	
	case BfIRCmd_DbgCreateSizedForwardDecl:
		{
			CMD_PARAM(int, tag);
			CMD_PARAM(String, name);
			CMD_PARAM(llvm::MDNode*, scope);
			CMD_PARAM(llvm::MDNode*, file);
			CMD_PARAM(int, line);
			CMD_PARAM(int64, sizeInBits);
			CMD_PARAM(int64, alignInBits);
			BF_ASSERT(file != NULL);
			SetResult(curId, mDIBuilder->createForwardDecl(tag, name.c_str(), (llvm::DIScope*)scope, (llvm::DIFile*)file, line, 0, sizeInBits, (uint32)alignInBits));
		}
		break;	
	case BeIRCmd_DbgSetTypeSize:
		{
			CMD_PARAM(llvm::MDNode*, mdType);
			CMD_PARAM(int64, sizeInBits);
			CMD_PARAM(int64, alignInBits);

			class DIMutType : public llvm::DIType
			{
			public:
				void Resize(int64 newSize, int32 newAlign)
				{
					init(getLine(), newSize, newAlign, getOffsetInBits(), getFlags());
				}
			};

			auto diType = (DIMutType*)mdType;
			diType->Resize(sizeInBits, (int32)alignInBits);
		}
		break;
	case BfIRCmd_DbgReplaceAllUses:
		{			
			CMD_PARAM(llvm::MDNode*, diPrevNode);
			CMD_PARAM(llvm::MDNode*, diNewNode);
			diPrevNode->replaceAllUsesWith(diNewNode); 			
		}
		break;
	case BfIRCmd_DbgDeleteTemporary:
		{
			CMD_PARAM(llvm::MDNode*, diNode);
			llvm::MDNode::deleteTemporary(diNode);
		}
		break;
	case BfIRCmd_DbgMakePermanent:
		{			
			CMD_PARAM(llvm::MDNode*, diNode);
			CMD_PARAM(llvm::MDNode*, diBaseType);
			CMD_PARAM(CmdParamVec<llvm::Metadata*>, members);

			llvm::MDNode* newNode = diNode;
			if (auto diComposite = llvm::dyn_cast<llvm::DICompositeType>(diNode))
			{	
				//diComposite->getBaseType()

				if (diBaseType != NULL)
				{
					// It's unfortunate we have to hard-code the '3' here
					diComposite->replaceOperandWith(3, diBaseType);
					BF_ASSERT(diComposite->getBaseType() == diBaseType);
				}

				if (members.size() != 0)
				{
					llvm::DINodeArray elements = mDIBuilder->getOrCreateArray(members);
					mDIBuilder->replaceArrays(diComposite, elements);
				}
				newNode = llvm::MDNode::replaceWithPermanent(llvm::TempDICompositeType(diComposite));
			}
			/*else if (auto diEnumerator = llvm::dyn_cast<llvm::DIEnumerator>(diNode))
			{
				if (members.size() != 0)
				{
					llvm::DINodeArray elements = mDIBuilder->getOrCreateArray(diNode);
					mDIBuilder->set(diComposite, elements);
				}
				newNode = llvm::MDNode::replaceWithPermanent(llvm::TempDIEnumerator(diEnumerator));
			}*/

			SetResult(curId, newNode);
			break;
		}
	case BfIRCmd_CreateEnumerator:
		{
			CMD_PARAM(String, name);
			CMD_PARAM(int64, val);
			SetResult(curId, mDIBuilder->createEnumerator(name.c_str(), val));
		}
		break;
	case BfIRCmd_DbgCreateMemberType:
		{
			CMD_PARAM(llvm::MDNode*, scope);
			CMD_PARAM(String, name);
			CMD_PARAM(llvm::MDNode*, file);
			CMD_PARAM(int, lineNumber);
			CMD_PARAM(int64, sizeInBits);
			CMD_PARAM(int64, alignInBits);
			CMD_PARAM(int64, offsetInBits);
			CMD_PARAM(int, flags);
			CMD_PARAM(llvm::MDNode*, type);
			BF_ASSERT(file != NULL);
			llvm::DINode::DIFlags diFlags = (llvm::DINode::DIFlags)flags;

            /*Beefy::debug_ostream os;
            os << "BfIRCmd_DbgCreateMemberType " << name.c_str() << "\n";
            scope->print(os);
            os << "\n";
            type->print(os);
            os << "\n";
            os.flush();*/

            auto member = mDIBuilder->createMemberType((llvm::DIScope*)scope, name.c_str(), (llvm::DIFile*)file, lineNumber, sizeInBits, (uint32)alignInBits, offsetInBits, diFlags, (llvm::DIType*)type);
            SetResult(curId, member);
            //OutputDebugStrF("BfIRCmd_DbgCreateMemberType = %p\n", member);
		}
		break;
	case BfIRCmd_DbgStaticCreateMemberType:
		{
			CMD_PARAM(llvm::MDNode*, scope);
			CMD_PARAM(String, name);
			CMD_PARAM(llvm::MDNode*, file);
			CMD_PARAM(int, lineNumber);
			CMD_PARAM(llvm::MDNode*, type);
			CMD_PARAM(int, flags);
			CMD_PARAM(llvm::Constant*, val);
			BF_ASSERT(file != NULL);
			llvm::DINode::DIFlags diFlags = (llvm::DINode::DIFlags)flags;

            /*Beefy::debug_ostream os;
            os << "BfIRCmd_DbgStaticCreateMemberType " << name.c_str() << "\n";
            scope->print(os);
            os << "\n";
            type->print(os);
            os << "\n";
            os.flush();*/

            auto member = mDIBuilder->createStaticMemberType((llvm::DIScope*)scope, name.c_str(), (llvm::DIFile*)file, lineNumber, (llvm::DIType*)type, diFlags, val);
            SetResult(curId, member);
            //OutputDebugStrF("BfIRCmd_DbgStaticCreateMemberType = %p\n", member);
		}
		break;
	case BfIRCmd_DbgCreateInheritance:
		{
			CMD_PARAM(llvm::MDNode*, type);
			CMD_PARAM(llvm::MDNode*, baseType);
			CMD_PARAM(int64, baseOffset);
			CMD_PARAM(int, flags);
			llvm::DINode::DIFlags diFlags = (llvm::DINode::DIFlags)flags;

            auto member = mDIBuilder->createInheritance((llvm::DIType*)type, (llvm::DIType*)baseType, baseOffset, 0, diFlags);
            SetResult(curId, member);
            //OutputDebugStrF("BfIRCmd_DbgCreateInheritance = %p\n", member);
		}
		break;
	case BfIRCmd_DbgCreateMethod:
		{
			CMD_PARAM(llvm::MDNode*, context);
			CMD_PARAM(String, name);
			CMD_PARAM(String, linkageName);
			CMD_PARAM(llvm::MDNode*, file);
			CMD_PARAM(int, lineNum); 
			CMD_PARAM(llvm::MDNode*, type); 
			CMD_PARAM(bool, isLocalToUnit);
			CMD_PARAM(bool, isDefinition);
			CMD_PARAM(int, vk);
			CMD_PARAM(int, vIndex);
			CMD_PARAM(llvm::MDNode*, vTableHolder);
			CMD_PARAM(int, flags);
			CMD_PARAM(bool, isOptimized);
			CMD_PARAM(llvm::Value*, fn);
			CMD_PARAM(CmdParamVec<llvm::MDNode*>, genericArgs);
			CMD_PARAM(CmdParamVec<llvm::Constant*>, genericConstValueArgs);
			BF_ASSERT(file != NULL);
						
			llvm::DITemplateParameterArray templateParamArr = NULL;
			llvm::DINodeArray templateParamNodes;
			if (genericArgs.size() != 0)
			{
				llvm::SmallVector<llvm::Metadata*, 16> templateParams;
				for (int i = 0; i < (int)genericArgs.size(); i++)
				{
					auto genericArg = (llvm::DIType*)genericArgs[i];
					String name = StrFormat("T%d", i);

					llvm::Constant* constant = NULL;
					if (i < genericConstValueArgs.size())
						constant = genericConstValueArgs[i];

					if (constant != NULL)					
						templateParams.push_back(mDIBuilder->createTemplateValueParameter(mDICompileUnit, name.c_str(), genericArg, constant));					
					else
						templateParams.push_back(mDIBuilder->createTemplateTypeParameter(mDICompileUnit, name.c_str(), genericArg));
				}
				templateParamNodes = mDIBuilder->getOrCreateArray(templateParams);
				templateParamArr = templateParamNodes.get();
			}			

			llvm::DINode::DIFlags diFlags = (llvm::DINode::DIFlags)flags;
			llvm::DISubprogram::DISPFlags dispFlags = llvm::DISubprogram::DISPFlags::SPFlagZero;
			if (isLocalToUnit)
				dispFlags = (llvm::DISubprogram::DISPFlags)(dispFlags | llvm::DISubprogram::DISPFlags::SPFlagLocalToUnit);
			if (isDefinition)
				dispFlags = (llvm::DISubprogram::DISPFlags)(dispFlags | llvm::DISubprogram::DISPFlags::SPFlagDefinition);
			if (isOptimized)
				dispFlags = (llvm::DISubprogram::DISPFlags)(dispFlags | llvm::DISubprogram::DISPFlags::SPFlagOptimized);
			if (vk != 0)
				dispFlags = (llvm::DISubprogram::DISPFlags)(dispFlags | llvm::DISubprogram::DISPFlags::SPFlagVirtual);

			auto diSubProgram = mDIBuilder->createMethod((llvm::DIScope*)context, name.c_str(), linkageName.c_str(), (llvm::DIFile*)file, lineNum,
				(llvm::DISubroutineType*)type, vIndex, 0, (llvm::DIType*)vTableHolder, diFlags, dispFlags, templateParamArr);			
			if (fn != NULL)
				((llvm::Function*)fn)->setSubprogram(diSubProgram);

            SetResult(curId, diSubProgram);

            //OutputDebugStrF("BfIRCmd_DbgCreateMethod = %p\n", diSubProgram);
		}
		break;
	case BfIRCmd_DbgCreateFunction:
		{
			CMD_PARAM(llvm::MDNode*, context);
			CMD_PARAM(String, name);
			CMD_PARAM(String, linkageName);
			CMD_PARAM(llvm::MDNode*, file);
			CMD_PARAM(int, lineNum); 
			CMD_PARAM(llvm::MDNode*, type); 
			CMD_PARAM(bool, isLocalToUnit);
			CMD_PARAM(bool, isDefinition);		
			CMD_PARAM(int, scopeLine);
			CMD_PARAM(int, flags);
			CMD_PARAM(bool, isOptimized);
			CMD_PARAM(llvm::Value*, fn);
			BF_ASSERT(file != NULL);
			llvm::DINode::DIFlags diFlags = (llvm::DINode::DIFlags)flags;

			llvm::DISubprogram::DISPFlags dispFlags = llvm::DISubprogram::DISPFlags::SPFlagZero;
			if (isLocalToUnit)
				dispFlags = (llvm::DISubprogram::DISPFlags)(dispFlags | llvm::DISubprogram::DISPFlags::SPFlagLocalToUnit);
			if (isDefinition)
				dispFlags = (llvm::DISubprogram::DISPFlags)(dispFlags | llvm::DISubprogram::DISPFlags::SPFlagDefinition);
			if (isOptimized)
				dispFlags = (llvm::DISubprogram::DISPFlags)(dispFlags | llvm::DISubprogram::DISPFlags::SPFlagOptimized);

			auto diSubProgram = mDIBuilder->createFunction((llvm::DIScope*)context, name.c_str(), linkageName.c_str(), (llvm::DIFile*)file, lineNum,
				(llvm::DISubroutineType*)type, scopeLine, diFlags, dispFlags);
			if (fn != NULL)
				((llvm::Function*)fn)->setSubprogram(diSubProgram);
			SetResult(curId, diSubProgram);

            //OutputDebugStrF("BfIRCmd_DbgCreateFunction = %p\n", diSubProgram);
		}
		break;
	case BfIRCmd_DbgCreateParameterVariable:
		{
			CMD_PARAM(llvm::MDNode*, scope);
			CMD_PARAM(String, name);
			CMD_PARAM(int, argNo);
			CMD_PARAM(llvm::MDNode*, file);
			CMD_PARAM(int, lineNum);
			CMD_PARAM(llvm::MDNode*, type);
			CMD_PARAM(bool, alwaysPreserve);
			CMD_PARAM(int, flags);
			BF_ASSERT(file != NULL);
			llvm::DINode::DIFlags diFlags = (llvm::DINode::DIFlags)flags;
			SetResult(curId, mDIBuilder->createParameterVariable((llvm::DIScope*)scope, name.c_str(), argNo, (llvm::DIFile*)file, lineNum, (llvm::DIType*)type,
				alwaysPreserve, diFlags));
		}
		break;
	case BfIRCmd_DbgCreateSubroutineType:
		{
			CMD_PARAM(CmdParamVec<llvm::Metadata*>, elements);			
			auto diArray = mDIBuilder->getOrCreateTypeArray(elements);
			SetResult(curId, mDIBuilder->createSubroutineType(diArray));
		}
		break;
	case BfIRCmd_DbgCreateAutoVariable:
		{
			CMD_PARAM(llvm::MDNode*, scope);
			CMD_PARAM(String, name);
			CMD_PARAM(llvm::MDNode*, file);
			CMD_PARAM(int, lineNo);
			CMD_PARAM(llvm::MDNode*, type);
			CMD_PARAM(int, initType);
			BF_ASSERT(file != NULL);
			llvm::DINode::DIFlags diFlags = (llvm::DINode::DIFlags)0;

			auto loc = mIRBuilder->getCurrentDebugLocation();
			auto dbgLoc = loc.getAsMDNode();

			SetResult(curId, mDIBuilder->createAutoVariable((llvm::DIScope*)scope, name.c_str(), (llvm::DIFile*)file, lineNo, (llvm::DIType*)type, false, diFlags));
		}
		break;
	case BfIRCmd_DbgInsertValueIntrinsic:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(llvm::MDNode*, varInfo);

			auto diVariable = (llvm::DILocalVariable*)varInfo;
			
			if (val == NULL)
			{
				val = llvm::ConstantInt::get(llvm::Type::getInt32Ty(*mLLVMContext), 0);
			}
			else if (mIsCodeView)
			{
				if (auto constant = llvm::dyn_cast<llvm::Constant>(val))
				{
					int64 writeVal = 0;
					if (auto constantInt = llvm::dyn_cast<llvm::ConstantInt>(val))
					{
						writeVal = constantInt->getSExtValue();
					}
										
					auto nameRef = diVariable->getName();

					if (writeVal < 0)
						diVariable->replaceOperandWith(1, llvm::MDString::get(*mLLVMContext, (String(nameRef) + StrFormat("$_%llu", -writeVal)).c_str()));
					else
						diVariable->replaceOperandWith(1, llvm::MDString::get(*mLLVMContext, (String(nameRef) + StrFormat("$%llu", writeVal)).c_str()));
				}
			}

			mDIBuilder->insertDbgValueIntrinsic(val, diVariable, mDIBuilder->createExpression(), 
				mIRBuilder->getCurrentDebugLocation(), (llvm::BasicBlock*)mIRBuilder->GetInsertBlock());
		}
		break;
	case BfIRCmd_DbgInsertDeclare:
		{
			CMD_PARAM(llvm::Value*, val);
			CMD_PARAM(llvm::MDNode*, varInfo);
			CMD_PARAM(llvm::Value*, insertBefore);

			llvm::Instruction* insertBeforeInst = NULL;
			if (insertBefore != NULL)
				insertBeforeInst = llvm::dyn_cast<llvm::Instruction>(insertBefore);
			if (insertBeforeInst != NULL)
			{
				SetResult(curId, mDIBuilder->insertDeclare(val, (llvm::DILocalVariable*)varInfo, mDIBuilder->createExpression(),
					mIRBuilder->getCurrentDebugLocation(), insertBeforeInst));
			}
			else
			{
				SetResult(curId, mDIBuilder->insertDeclare(val, (llvm::DILocalVariable*)varInfo, mDIBuilder->createExpression(),
					mIRBuilder->getCurrentDebugLocation(), mIRBuilder->GetInsertBlock()));
			}			
		}
		break;	
	case BfIRCmd_DbgLifetimeEnd:
		{
			CMD_PARAM(llvm::MDNode*, varInfo);
		}		
		break;
	case BfIRCmd_DbgCreateGlobalVariable:
		{
			CMD_PARAM(llvm::MDNode*, context);
			CMD_PARAM(String, name);
			CMD_PARAM(String, linkageName);
			CMD_PARAM(llvm::MDNode*, file);
			CMD_PARAM(int, lineNum);
			CMD_PARAM(llvm::MDNode*, type);
			CMD_PARAM(bool, isLocalToUnit);			
			CMD_PARAM(llvm::Constant*, val);
			CMD_PARAM(llvm::MDNode*, decl);
			//BF_ASSERT(file != NULL);
			llvm::DIExpression* diExpr = NULL;			
			auto gve = mDIBuilder->createGlobalVariableExpression((llvm::DIScope*)context, name.c_str(), linkageName.c_str(), (llvm::DIFile*)file, lineNum, (llvm::DIType*)type,
				isLocalToUnit, diExpr, decl);
			
			if (val != NULL)
			{
				if (auto globalVar = llvm::dyn_cast<llvm::GlobalVariable>(val))
				{
					globalVar->addDebugInfo(gve);
				}
			}

			SetResult(curId, diExpr);
		}
		break;
	case BfIRCmd_DbgCreateLexicalBlock:
		{
			CMD_PARAM(llvm::MDNode*, scope);
			CMD_PARAM(llvm::MDNode*, file);
			CMD_PARAM(int, lineNum);
			CMD_PARAM(int, col);
			BF_ASSERT(file != NULL);
			SetResult(curId, mDIBuilder->createLexicalBlock((llvm::DIScope*)scope, (llvm::DIFile*)file, (unsigned)lineNum, (unsigned)col));
		}
		break;	
	case BfIRCmd_DbgCreateAnnotation:
		{
			CMD_PARAM(llvm::MDNode*, scope);
			CMD_PARAM(String, name);
			CMD_PARAM(llvm::Value*, value);

			if (auto dbgFunc = llvm::dyn_cast<llvm::DISubprogram>(scope))
			{
				auto beType = value->getType();

				auto diType = mDIBuilder->createBasicType("int32", 4 * 8, llvm::dwarf::DW_ATE_signed);

				llvm::DINode::DIFlags diFlags = (llvm::DINode::DIFlags)0;

				auto loc = mIRBuilder->getCurrentDebugLocation();
				auto dbgLoc = loc.getAsMDNode();
				auto diScope = (llvm::DIScope*)scope;

				String dbgName = "#" + name;

				int64 writeVal = 0;
				if (auto constant = llvm::dyn_cast<llvm::ConstantInt>(value))
				{
					writeVal = constant->getSExtValue();
				}
								
				if (writeVal < 0)
					dbgName += StrFormat("$_%llu", -writeVal);
				else
					dbgName += StrFormat("$%llu", writeVal);

				auto dbgVar = mDIBuilder->createAutoVariable((llvm::DIScope*)scope, dbgName.c_str(), (llvm::DIFile*)diScope->getFile(), 0, diType, false, diFlags);

				mDIBuilder->insertDbgValueIntrinsic(value, dbgVar, mDIBuilder->createExpression(),
					mIRBuilder->getCurrentDebugLocation(), (llvm::BasicBlock*)mIRBuilder->GetInsertBlock());
			}
		}
		break;
	default:
		BF_FATAL("Unhandled");
		break;
	}
}

void BfIRCodeGen::SetConfigConst(int idx, int value)
{
	auto constVal = llvm::ConstantInt::get(llvm::Type::getInt32Ty(*mLLVMContext), value);
	BF_ASSERT(idx == (int)mConfigConsts32.size());
	mConfigConsts32.Add(constVal);

	constVal = llvm::ConstantInt::get(llvm::Type::getInt64Ty(*mLLVMContext), value);
	BF_ASSERT(idx == (int)mConfigConsts64.size());
	mConfigConsts64.Add(constVal);
}

llvm::Value* BfIRCodeGen::GetLLVMValue(int id)
{
	auto& result = mResults[id];
	BF_ASSERT(result.mKind == BfIRCodeGenEntryKind_LLVMValue);
	return result.mLLVMValue;
}

llvm::Type* BfIRCodeGen::GetLLVMType(int id)
{
	auto& result = mResults[id];
	BF_ASSERT(result.mKind == BfIRCodeGenEntryKind_LLVMType);
	return result.mLLVMType;
}

llvm::BasicBlock * BfIRCodeGen::GetLLVMBlock(int id)
{
	auto& result = mResults[id];
	BF_ASSERT(result.mKind == BfIRCodeGenEntryKind_LLVMBasicBlock);
	return result.mLLVMBlock;
}

llvm::MDNode* BfIRCodeGen::GetLLVMMetadata(int id)
{
	auto& result = mResults[id];	
	BF_ASSERT(result.mKind == BfIRCodeGenEntryKind_LLVMMetadata);
	return result.mLLVMMetadata;
}

llvm::Type* BfIRCodeGen::GetLLVMTypeById(int id)
{
	return GetTypeEntry(id).mLLVMType;
}

static int GetOptLevel(BfOptLevel optLevel)
{
	switch (optLevel)
	{
	case BfOptLevel_O1: return 1;
	case BfOptLevel_O2: return 2;
	case BfOptLevel_O3: return 3;
	default: return 0;
	}
}

//enum CFLAAType { None, Steensgaard, Andersen, Both };

static void AddInitialAliasAnalysisPasses(llvm::legacy::PassManagerBase &PM, const BfCodeGenOptions& options)
{
	switch (options.mUseCFLAA) {
	case BfCFLAAType_Steensgaard:
		PM.add(llvm::createCFLSteensAAWrapperPass());
		break;
	case BfCFLAAType_Andersen:
		PM.add(llvm::createCFLAndersAAWrapperPass());
		break;
	case BfCFLAAType_Both:
		PM.add(llvm::createCFLSteensAAWrapperPass());
		PM.add(llvm::createCFLAndersAAWrapperPass());
		break;
	default:
		break;
	}

	// Add TypeBasedAliasAnalysis before BasicAliasAnalysis so that
	// BasicAliasAnalysis wins if they disagree. This is intended to help
	// support "obvious" type-punning idioms.
	PM.add(llvm::createTypeBasedAAWrapperPass());
	PM.add(llvm::createScopedNoAliasAAWrapperPass());
}

static void AddInstructionCombiningPass(llvm::legacy::PassManagerBase &PM, const BfCodeGenOptions& options)
{
	bool ExpensiveCombines = GetOptLevel(options.mOptLevel) > 2;
	PM.add(llvm::createInstructionCombiningPass(options.mExpensiveCombines));
}

static void AddFunctionSimplificationPasses(llvm::legacy::PassManagerBase &MPM, const BfCodeGenOptions& options) 
{
	// Start of function pass.
	// Break up aggregate allocas, using SSAUpdater.
	MPM.add(llvm::createSROAPass());
	MPM.add(llvm::createEarlyCSEPass(options.mEnableEarlyCSEMemSSA)); // Catch trivial redundancies
	//if (EnableGVNHoist)
	if (options.mEnableGVNHoist)
		MPM.add(llvm::createGVNHoistPass());
	if (options.mEnableGVNSink) 
	{
		MPM.add(llvm::createGVNSinkPass());
		MPM.add(llvm::createCFGSimplificationPass());
	}

	// Speculative execution if the target has divergent branches; otherwise nop.
	MPM.add(llvm::createSpeculativeExecutionIfHasBranchDivergencePass());
	MPM.add(llvm::createJumpThreadingPass());         // Thread jumps.
	MPM.add(llvm::createCorrelatedValuePropagationPass()); // Propagate conditionals
	MPM.add(llvm::createCFGSimplificationPass());     // Merge & remove BBs
	// Combine silly seq's
	if (GetOptLevel(options.mOptLevel) > 2)
		MPM.add(llvm::createAggressiveInstCombinerPass());
	AddInstructionCombiningPass(MPM, options);
	if (options.mSizeLevel == 0 && !options.mDisableLibCallsShrinkWrap)
		MPM.add(llvm::createLibCallsShrinkWrapPass());
	//AddExtensionsToPM(llvm::EP_Peephole, MPM);

	// Optimize memory intrinsic calls based on the profiled size information.
	if (options.mSizeLevel == 0)
		MPM.add(llvm::createPGOMemOPSizeOptLegacyPass());

	MPM.add(llvm::createTailCallEliminationPass()); // Eliminate tail calls
	MPM.add(llvm::createCFGSimplificationPass());     // Merge & remove BBs
	MPM.add(llvm::createReassociatePass());           // Reassociate expressions

	// Begin the loop pass pipeline.
	if (options.mEnableSimpleLoopUnswitch) {
		// The simple loop unswitch pass relies on separate cleanup passes. Schedule
		// them first so when we re-process a loop they run before other loop
		// passes.
		MPM.add(llvm::createLoopInstSimplifyPass());
		MPM.add(llvm::createLoopSimplifyCFGPass());
	}
	// Rotate Loop - disable header duplication at -Oz
	MPM.add(llvm::createLoopRotatePass(options.mSizeLevel == 2 ? 0 : -1));
	MPM.add(llvm::createLICMPass());                  // Hoist loop invariants
	if (options.mEnableSimpleLoopUnswitch)
		MPM.add(llvm::createSimpleLoopUnswitchLegacyPass());
	else
		MPM.add(llvm::createLoopUnswitchPass(options.mSizeLevel || GetOptLevel(options.mOptLevel) < 3, options.mDivergentTarget));
	// FIXME: We break the loop pass pipeline here in order to do full
	// simplify-cfg. Eventually loop-simplifycfg should be enhanced to replace the
	// need for this.
	MPM.add(llvm::createCFGSimplificationPass());
	AddInstructionCombiningPass(MPM, options);
	// We resume loop passes creating a second loop pipeline here.
	MPM.add(llvm::createIndVarSimplifyPass());        // Canonicalize indvars
	MPM.add(llvm::createLoopIdiomPass());             // Recognize idioms like memset.
	//addExtensionsToPM(EP_LateLoopOptimizations, MPM);
	MPM.add(llvm::createLoopDeletionPass());          // Delete dead loops

	if (options.mEnableLoopInterchange)
		MPM.add(llvm::createLoopInterchangePass()); // Interchange loops

	MPM.add(llvm::createSimpleLoopUnrollPass(GetOptLevel(options.mOptLevel),
		options.mDisableUnrollLoops)); // Unroll small loops
	//addExtensionsToPM(EP_LoopOptimizerEnd, MPM);
	// This ends the loop pass pipelines.

	if (GetOptLevel(options.mOptLevel) > 1) {
		MPM.add(llvm::createMergedLoadStoreMotionPass()); // Merge ld/st in diamonds
		MPM.add(options.mNewGVN ? llvm::createNewGVNPass()
			: llvm::createGVNPass(options.mDisableGVNLoadPRE)); // Remove redundancies
	}
	MPM.add(llvm::createMemCpyOptPass());             // Remove memcpy / form memset
	MPM.add(llvm::createSCCPPass());                  // Constant prop with SCCP

	// Delete dead bit computations (instcombine runs after to fold away the dead
	// computations, and then ADCE will run later to exploit any new DCE
	// opportunities that creates).
	MPM.add(llvm::createBitTrackingDCEPass());        // Delete dead bit computations

	// Run instcombine after redundancy elimination to exploit opportunities
	// opened up by them.
	AddInstructionCombiningPass(MPM, options);
	//addExtensionsToPM(EP_Peephole, MPM);
	MPM.add(llvm::createJumpThreadingPass());         // Thread jumps
	MPM.add(llvm::createCorrelatedValuePropagationPass());
	MPM.add(llvm::createDeadStoreEliminationPass());  // Delete dead stores
	MPM.add(llvm::createLICMPass());

	//addExtensionsToPM(EP_ScalarOptimizerLate, MPM);

	if (options.mRerollLoops)
		MPM.add(llvm::createLoopRerollPass());
	if (!options.mRunSLPAfterLoopVectorization && options.mSLPVectorize)
		MPM.add(llvm::createSLPVectorizerPass()); // Vectorize parallel scalar chains.

	MPM.add(llvm::createAggressiveDCEPass());         // Delete dead instructions
	MPM.add(llvm::createCFGSimplificationPass()); // Merge & remove BBs
	// Clean up after everything.
	AddInstructionCombiningPass(MPM, options);
	//addExtensionsToPM(EP_Peephole, MPM);

// 	if (options.mEnableCHR && options.mOptLevel >= 3 &&
// 		(!PGOInstrUse.empty() || !PGOSampleUse.empty()))
// 		MPM.add(createControlHeightReductionLegacyPass());
}

static void PopulateModulePassManager(llvm::legacy::PassManagerBase &MPM, const BfCodeGenOptions& options)
{
// 	if (!PGOSampleUse.empty()) {
// 		MPM.add(createPruneEHPass());
// 		MPM.add(createSampleProfileLoaderPass(PGOSampleUse));
// 	}
	llvm::Pass* Inliner = NULL;
	bool prepareForLTO = false;
	bool prepareForThinLTO = options.mLTOType == BfLTOType_Thin;
	bool performThinLTO = false;
	bool enableNonLTOGlobalsModRef = false;

	// Allow forcing function attributes as a debugging and tuning aid.
	MPM.add(llvm::createForceFunctionAttrsLegacyPass());

	// If all optimizations are disabled, just run the always-inline pass and,
	// if enabled, the function merging pass.
	if (GetOptLevel(options.mOptLevel) == 0) {
		//addPGOInstrPasses(MPM);
		if (Inliner) {
			MPM.add(Inliner);
			Inliner = nullptr;
		}

		// FIXME: The BarrierNoopPass is a HACK! The inliner pass above implicitly
		// creates a CGSCC pass manager, but we don't want to add extensions into
		// that pass manager. To prevent this we insert a no-op module pass to reset
		// the pass manager to get the same behavior as EP_OptimizerLast in non-O0
		// builds. The function merging pass is
		if (options.mMergeFunctions)
			MPM.add(llvm::createMergeFunctionsPass());
// 		else if (GlobalExtensionsNotEmpty() || !Extensions.empty())
// 			MPM.add(createBarrierNoopPass());

		if (performThinLTO) 
		{
			// Drop available_externally and unreferenced globals. This is necessary
			// with ThinLTO in order to avoid leaving undefined references to dead
			// globals in the object file.
			MPM.add(llvm::createEliminateAvailableExternallyPass());
			MPM.add(llvm::createGlobalDCEPass());
		}

		//addExtensionsToPM(EP_EnabledOnOptLevel0, MPM);

		if (prepareForLTO || prepareForThinLTO) {
			MPM.add(llvm::createCanonicalizeAliasesPass());
			// Rename anon globals to be able to export them in the summary.
			// This has to be done after we add the extensions to the pass manager
			// as there could be passes (e.g. Adddress sanitizer) which introduce
			// new unnamed globals.
			MPM.add(llvm::createNameAnonGlobalPass());
		}
		return;
	}

	// Add LibraryInfo if we have some.
// 	if (LibraryInfo)
// 		MPM.add(new TargetLibraryInfoWrapperPass(*LibraryInfo));

	AddInitialAliasAnalysisPasses(MPM, options);

	// For ThinLTO there are two passes of indirect call promotion. The
	// first is during the compile phase when PerformThinLTO=false and
	// intra-module indirect call targets are promoted. The second is during
	// the ThinLTO backend when PerformThinLTO=true, when we promote imported
	// inter-module indirect calls. For that we perform indirect call promotion
	// earlier in the pass pipeline, here before globalopt. Otherwise imported
	// available_externally functions look unreferenced and are removed.
// 	if (performThinLTO)
// 		MPM.add(llvm::createPGOIndirectCallPromotionLegacyPass(/*InLTO = */ true,
// 			!PGOSampleUse.empty()));

	// For SamplePGO in ThinLTO compile phase, we do not want to unroll loops
	// as it will change the CFG too much to make the 2nd profile annotation
	// in backend more difficult.
// 	bool PrepareForThinLTOUsingPGOSampleProfile =
// 		PrepareForThinLTO && !PGOSampleUse.empty();

	bool disableUnrollLoops = false;
	bool prepareForThinLTOUsingPGOSampleProfile = false;
	if (prepareForThinLTOUsingPGOSampleProfile)
		disableUnrollLoops = true;

	// Infer attributes about declarations if possible.
	MPM.add(llvm::createInferFunctionAttrsLegacyPass());

	//addExtensionsToPM(EP_ModuleOptimizerEarly, MPM);

	if (GetOptLevel(options.mOptLevel) > 2)
		MPM.add(llvm::createCallSiteSplittingPass());

	MPM.add(llvm::createIPSCCPPass());          // IP SCCP
	MPM.add(llvm::createCalledValuePropagationPass());
	MPM.add(llvm::createGlobalOptimizerPass()); // Optimize out global vars
	// Promote any localized global vars.
	MPM.add(llvm::createPromoteMemoryToRegisterPass());

	MPM.add(llvm::createDeadArgEliminationPass()); // Dead argument elimination

	AddInstructionCombiningPass(MPM, options); // Clean up after IPCP & DAE
	//addExtensionsToPM(EP_Peephole, MPM);
	MPM.add(llvm::createCFGSimplificationPass()); // Clean up after IPCP & DAE

	// For SamplePGO in ThinLTO compile phase, we do not want to do indirect
	// call promotion as it will change the CFG too much to make the 2nd
	// profile annotation in backend more difficult.
	// PGO instrumentation is added during the compile phase for ThinLTO, do
	// not run it a second time
// 	if (!performThinLTO && !prepareForThinLTOUsingPGOSampleProfile)
// 		llvm::addPGOInstrPasses(MPM);

	// We add a module alias analysis pass here. In part due to bugs in the
	// analysis infrastructure this "works" in that the analysis stays alive
	// for the entire SCC pass run below.
	MPM.add(llvm::createGlobalsAAWrapperPass());

	// Start of CallGraph SCC passes.
	MPM.add(llvm::createPruneEHPass()); // Remove dead EH info
	bool RunInliner = false;
	if (Inliner) {
		MPM.add(Inliner);
		Inliner = nullptr;
		RunInliner = true;
	}

	MPM.add(llvm::createPostOrderFunctionAttrsLegacyPass());
	if (GetOptLevel(options.mOptLevel) > 2)
		MPM.add(llvm::createArgumentPromotionPass()); // Scalarize uninlined fn args

	//addExtensionsToPM(EP_CGSCCOptimizerLate, MPM);
	AddFunctionSimplificationPasses(MPM, options);

	// FIXME: This is a HACK! The inliner pass above implicitly creates a CGSCC
	// pass manager that we are specifically trying to avoid. To prevent this
	// we must insert a no-op module pass to reset the pass manager.
	MPM.add(llvm::createBarrierNoopPass());

	if (options.mRunPartialInlining)
		MPM.add(llvm::createPartialInliningPass());

	if (GetOptLevel(options.mOptLevel) > 1 && !prepareForLTO && !prepareForThinLTO)
		// Remove avail extern fns and globals definitions if we aren't
		// compiling an object file for later LTO. For LTO we want to preserve
		// these so they are eligible for inlining at link-time. Note if they
		// are unreferenced they will be removed by GlobalDCE later, so
		// this only impacts referenced available externally globals.
		// Eventually they will be suppressed during codegen, but eliminating
		// here enables more opportunity for GlobalDCE as it may make
		// globals referenced by available external functions dead
		// and saves running remaining passes on the eliminated functions.
		MPM.add(llvm::createEliminateAvailableExternallyPass());

	MPM.add(llvm::createReversePostOrderFunctionAttrsPass());

	// The inliner performs some kind of dead code elimination as it goes,
	// but there are cases that are not really caught by it. We might
	// at some point consider teaching the inliner about them, but it
	// is OK for now to run GlobalOpt + GlobalDCE in tandem as their
	// benefits generally outweight the cost, making the whole pipeline
	// faster.
	if (RunInliner) {
		MPM.add(llvm::createGlobalOptimizerPass());
		MPM.add(llvm::createGlobalDCEPass());
	}

	// If we are planning to perform ThinLTO later, let's not bloat the code with
	// unrolling/vectorization/... now. We'll first run the inliner + CGSCC passes
	// during ThinLTO and perform the rest of the optimizations afterward.
	if (prepareForThinLTO) {
		// Ensure we perform any last passes, but do so before renaming anonymous
		// globals in case the passes add any.
		//addExtensionsToPM(EP_OptimizerLast, MPM);
		MPM.add(llvm::createCanonicalizeAliasesPass());
		// Rename anon globals to be able to export them in the summary.
		MPM.add(llvm::createNameAnonGlobalPass());
		return;
	}

	if (performThinLTO)
		// Optimize globals now when performing ThinLTO, this enables more
		// optimizations later.
		MPM.add(llvm::createGlobalOptimizerPass());

	// Scheduling LoopVersioningLICM when inlining is over, because after that
	// we may see more accurate aliasing. Reason to run this late is that too
	// early versioning may prevent further inlining due to increase of code
	// size. By placing it just after inlining other optimizations which runs
	// later might get benefit of no-alias assumption in clone loop.
	if (options.mUseLoopVersioningLICM) {
		MPM.add(llvm::createLoopVersioningLICMPass());    // Do LoopVersioningLICM
		MPM.add(llvm::createLICMPass());                  // Hoist loop invariants
	}

	// We add a fresh GlobalsModRef run at this point. This is particularly
	// useful as the above will have inlined, DCE'ed, and function-attr
	// propagated everything. We should at this point have a reasonably minimal
	// and richly annotated call graph. By computing aliasing and mod/ref
	// information for all local globals here, the late loop passes and notably
	// the vectorizer will be able to use them to help recognize vectorizable
	// memory operations.
	//
	// Note that this relies on a bug in the pass manager which preserves
	// a module analysis into a function pass pipeline (and throughout it) so
	// long as the first function pass doesn't invalidate the module analysis.
	// Thus both Float2Int and LoopRotate have to preserve AliasAnalysis for
	// this to work. Fortunately, it is trivial to preserve AliasAnalysis
	// (doing nothing preserves it as it is required to be conservatively
	// correct in the face of IR changes).
	MPM.add(llvm::createGlobalsAAWrapperPass());

	MPM.add(llvm::createFloat2IntPass());

	//addExtensionsToPM(EP_VectorizerStart, MPM);

	// Re-rotate loops in all our loop nests. These may have fallout out of
	// rotated form due to GVN or other transformations, and the vectorizer relies
	// on the rotated form. Disable header duplication at -Oz.
	MPM.add(llvm::createLoopRotatePass(options.mSizeLevel == 2 ? 0 : -1));

	// Distribute loops to allow partial vectorization.  I.e. isolate dependences
	// into separate loop that would otherwise inhibit vectorization.  This is
	// currently only performed for loops marked with the metadata
	// llvm.loop.distribute=true or when -enable-loop-distribute is specified.
	MPM.add(llvm::createLoopDistributePass());

	MPM.add(llvm::createLoopVectorizePass(options.mDisableUnrollLoops, !options.mLoopVectorize));

	// Eliminate loads by forwarding stores from the previous iteration to loads
	// of the current iteration.
	MPM.add(llvm::createLoopLoadEliminationPass());

	// FIXME: Because of #pragma vectorize enable, the passes below are always
	// inserted in the pipeline, even when the vectorizer doesn't run (ex. when
	// on -O1 and no #pragma is found). Would be good to have these two passes
	// as function calls, so that we can only pass them when the vectorizer
	// changed the code.
	AddInstructionCombiningPass(MPM, options);
	if (GetOptLevel(options.mOptLevel) > 1 && options.mExtraVectorizerPasses) {
		// At higher optimization levels, try to clean up any runtime overlap and
		// alignment checks inserted by the vectorizer. We want to track correllated
		// runtime checks for two inner loops in the same outer loop, fold any
		// common computations, hoist loop-invariant aspects out of any outer loop,
		// and unswitch the runtime checks if possible. Once hoisted, we may have
		// dead (or speculatable) control flows or more combining opportunities.
		MPM.add(llvm::createEarlyCSEPass());
		MPM.add(llvm::createCorrelatedValuePropagationPass());
		AddInstructionCombiningPass(MPM, options);
		MPM.add(llvm::createLICMPass());
		MPM.add(llvm::createLoopUnswitchPass(options.mSizeLevel || GetOptLevel(options.mOptLevel) < 3, options.mDivergentTarget));
		MPM.add(llvm::createCFGSimplificationPass());
		AddInstructionCombiningPass(MPM, options);
	}

	// Cleanup after loop vectorization, etc. Simplification passes like CVP and
	// GVN, loop transforms, and others have already run, so it's now better to
	// convert to more optimized IR using more aggressive simplify CFG options.
	// The extra sinking transform can create larger basic blocks, so do this
	// before SLP vectorization.
	MPM.add(llvm::createCFGSimplificationPass(1, true, true, false, true));

	if (options.mRunSLPAfterLoopVectorization && options.mSLPVectorize) {
		MPM.add(llvm::createSLPVectorizerPass()); // Vectorize parallel scalar chains.
		if (GetOptLevel(options.mOptLevel) > 1 && options.mExtraVectorizerPasses) {
			MPM.add(llvm::createEarlyCSEPass());
		}
	}

	//addExtensionsToPM(EP_Peephole, MPM);
	AddInstructionCombiningPass(MPM, options);

	if (options.mEnableUnrollAndJam && !disableUnrollLoops) {
		// Unroll and Jam. We do this before unroll but need to be in a separate
		// loop pass manager in order for the outer loop to be processed by
		// unroll and jam before the inner loop is unrolled.
		MPM.add(llvm::createLoopUnrollAndJamPass(GetOptLevel(options.mOptLevel)));
	}

	MPM.add(llvm::createLoopUnrollPass(GetOptLevel(options.mOptLevel),
		disableUnrollLoops)); // Unroll small loops

	if (!disableUnrollLoops) {
		// LoopUnroll may generate some redundency to cleanup.
		AddInstructionCombiningPass(MPM, options);

		// Runtime unrolling will introduce runtime check in loop prologue. If the
		// unrolled loop is a inner loop, then the prologue will be inside the
		// outer loop. LICM pass can help to promote the runtime check out if the
		// checked value is loop invariant.
		MPM.add(llvm::createLICMPass());
	}

	MPM.add(llvm::createWarnMissedTransformationsPass());

	// After vectorization and unrolling, assume intrinsics may tell us more
	// about pointer alignments.
	MPM.add(llvm::createAlignmentFromAssumptionsPass());

	// FIXME: We shouldn't bother with this anymore.
	MPM.add(llvm::createStripDeadPrototypesPass()); // Get rid of dead prototypes

	// GlobalOpt already deletes dead functions and globals, at -O2 try a
	// late pass of GlobalDCE.  It is capable of deleting dead cycles.
	if (GetOptLevel(options.mOptLevel) > 1) {
		MPM.add(llvm::createGlobalDCEPass());         // Remove dead fns and globals.
		MPM.add(llvm::createConstantMergePass());     // Merge dup global constants
	}

	if (options.mMergeFunctions)
		MPM.add(llvm::createMergeFunctionsPass());

	// LoopSink pass sinks instructions hoisted by LICM, which serves as a
	// canonicalization pass that enables other optimizations. As a result,
	// LoopSink pass needs to be a very late IR pass to avoid undoing LICM
	// result too early.
	MPM.add(llvm::createLoopSinkPass());
	// Get rid of LCSSA nodes.
	MPM.add(llvm::createInstSimplifyLegacyPass());

	// This hoists/decomposes div/rem ops. It should run after other sink/hoist
	// passes to avoid re-sinking, but before SimplifyCFG because it can allow
	// flattening of blocks.
	MPM.add(llvm::createDivRemPairsPass());

	if (options.mEnableHotColdSplit)
		MPM.add(llvm::createHotColdSplittingPass());

	// LoopSink (and other loop passes since the last simplifyCFG) might have
	// resulted in single-entry-single-exit or empty blocks. Clean up the CFG.
	MPM.add(llvm::createCFGSimplificationPass());

	//addExtensionsToPM(EP_OptimizerLast, MPM);

	if (prepareForLTO) {
		MPM.add(llvm::createCanonicalizeAliasesPass());
		// Rename anon globals to be able to handle them in the summary
		MPM.add(llvm::createNameAnonGlobalPass());
	}
}


namespace
{
	struct BfPass : public llvm::MachineFunctionPass
	{
		static char ID;
		BfPass() : llvm::MachineFunctionPass(ID) {}

		bool runOnMachineFunction(llvm::MachineFunction &F) override
		{
			//errs() << "Hello: ";
			//errs().write_escaped(F.getName()) << '\n';
			return false;
		}
	};
}

char BfPass::ID = 0;
static llvm::RegisterPass<BfPass> sBfPass("BfPass", "Beef Pass", false, false);

// We need this wrapper to access LangOpts and CGOpts from extension functions
// that we add to the PassManagerBuilder.
class PassManagerBuilderWrapper : public llvm::PassManagerBuilder
{
public:
	/*PassManagerBuilderWrapper(const Triple &TargetTriple,
		const CodeGenOptions &CGOpts,
		const LangOptions &LangOpts)
		: PassManagerBuilder(), TargetTriple(TargetTriple), CGOpts(CGOpts),
		LangOpts(LangOpts) {}
	const Triple &getTargetTriple() const { return TargetTriple; }
	const CodeGenOptions &getCGOpts() const { return CGOpts; }
	const LangOptions &getLangOpts() const { return LangOpts; }

private:
	const Triple &TargetTriple;
	const CodeGenOptions &CGOpts;
	const LangOptions &LangOpts;*/
};

llvm::Expected<llvm::BitcodeModule> FindThinLTOModule(llvm::MemoryBufferRef MBRef)
{
	llvm::Expected<std::vector<llvm::BitcodeModule>> BMsOrErr = getBitcodeModuleList(MBRef);
	if (!BMsOrErr)
		return BMsOrErr.takeError();

	// The bitcode file may contain multiple modules, we want the one that is
	// marked as being the ThinLTO module.
	for (llvm::BitcodeModule &BM : *BMsOrErr) {
		llvm::Expected<llvm::BitcodeLTOInfo> LTOInfo = BM.getLTOInfo();
		if (LTOInfo && LTOInfo->IsThinLTO)
			return BM;
	}

	return llvm::make_error<llvm::StringError>("Could not find module summary",
		llvm::inconvertibleErrorCode());
}

bool BfIRCodeGen::WriteObjectFile(const StringImpl& outFileName, const BfCodeGenOptions& codeGenOptions)
{
	// 	{
	// 		PassManagerBuilderWrapper pmBuilder;
	// 
	// 		
	// 	}
	
	mHasDebugLoc = false; // So fails don't show a line number

	bool enableLTO = codeGenOptions.mLTOType != BfLTOType_None;

	if (enableLTO)
	{
		// We have some constructs which trip up ThinLTO, and it's not useful to LTO here anyway
		if (GetFileName(outFileName) == "vdata.obj")
		{
			enableLTO = false;
		}
	}

	llvm::CodeGenOpt::Level optLvl = llvm::CodeGenOpt::None;

	llvm::SMDiagnostic Err;
	llvm::Triple theTriple;

	theTriple = llvm::Triple(mLLVMModule->getTargetTriple());

	String cpuName = "";
	String arch = "";

	// Get the target specific parser.
	std::string Error;
	const llvm::Target *theTarget = llvm::TargetRegistry::lookupTarget(arch.c_str(), theTriple, Error);
	if (!theTarget)
	{
		Fail(StrFormat("Failed to create LLVM Target: %s", Error.c_str()));
		return false;
	}

	llvm::TargetOptions Options = llvm::TargetOptions(); // InitTargetOptionsFromCodeGenFlags();

	String featuresStr;

	if (codeGenOptions.mOptLevel == BfOptLevel_O1)
	{
		//optLvl = CodeGenOpt::Less;
	}
	else if (codeGenOptions.mOptLevel == BfOptLevel_O2)
		optLvl = llvm::CodeGenOpt::Default;
	else if (codeGenOptions.mOptLevel == BfOptLevel_O3)
		optLvl = llvm::CodeGenOpt::Aggressive;

	if (codeGenOptions.mSIMDSetting == BfSIMDSetting_SSE)
		featuresStr = "+sse";
	else if (codeGenOptions.mSIMDSetting == BfSIMDSetting_SSE2)
		featuresStr = "+sse2";
	else if (codeGenOptions.mSIMDSetting == BfSIMDSetting_SSE3)
		featuresStr = "+sse3";
	else if (codeGenOptions.mSIMDSetting == BfSIMDSetting_SSE4)
		featuresStr = "+sse4";
	else if (codeGenOptions.mSIMDSetting == BfSIMDSetting_SSE41)
		featuresStr = "+sse4.1";
	else if (codeGenOptions.mSIMDSetting == BfSIMDSetting_AVX)
		featuresStr = "+avx";
	else if (codeGenOptions.mSIMDSetting == BfSIMDSetting_AVX2)
		featuresStr = "+avx2";

	llvm::Optional<llvm::Reloc::Model> relocModel;
	llvm::CodeModel::Model cmModel = llvm::CodeModel::Small;

	switch (codeGenOptions.mRelocType)
	{
	case BfRelocType_Static:
		relocModel = llvm::Reloc::Model::DynamicNoPIC;
		break;
	case BfRelocType_PIC:
		relocModel = llvm::Reloc::Model::PIC_;
		break;
	case BfRelocType_DynamicNoPIC:
		relocModel = llvm::Reloc::Model::DynamicNoPIC;
		break;
	case BfRelocType_ROPI:
		relocModel = llvm::Reloc::Model::ROPI;
		break;
	case BfRelocType_RWPI:
		relocModel = llvm::Reloc::Model::RWPI;
		break;
	case BfRelocType_ROPI_RWPI:
		relocModel = llvm::Reloc::Model::ROPI_RWPI;
		break;
	}

	switch (codeGenOptions.mPICLevel)
	{
	case BfPICLevel_Not:
		mLLVMModule->setPICLevel(llvm::PICLevel::Level::NotPIC);
		break;
	case BfPICLevel_Small:
		mLLVMModule->setPICLevel(llvm::PICLevel::Level::SmallPIC);
		break;
	case BfPICLevel_Big:
		mLLVMModule->setPICLevel(llvm::PICLevel::Level::BigPIC);
		break;
	}

	std::unique_ptr<llvm::TargetMachine> target(
		theTarget->createTargetMachine(theTriple.getTriple(), cpuName.c_str(), featuresStr.c_str(),
			Options, relocModel, cmModel, optLvl));	

	std::error_code EC;
	llvm::sys::fs::OpenFlags OpenFlags = llvm::sys::fs::F_None;

	llvm::raw_fd_ostream out(outFileName.c_str(), EC, OpenFlags);

	if (EC)
		return false;
	// Build up all of the passes that we want to do to the module.
	llvm::legacy::PassManager PM;

	// Add an appropriate TargetLibraryInfo pass for the module's triple.	
	llvm::TargetLibraryInfoImpl TLII(theTriple);

	PM.add(new llvm::TargetLibraryInfoWrapperPass(TLII));

	// Add the target data from the target machine, if it exists, or the module.
	mLLVMModule->setDataLayout(target->createDataLayout());
	//PM.add(new DataLayoutPass());
	PopulateModulePassManager(PM, codeGenOptions);

	llvm::raw_fd_ostream* outStream = NULL;
	defer ( delete outStream; );

	if (enableLTO)
	{
		std::error_code ec;
		outStream = new llvm::raw_fd_ostream(outFileName.c_str(), ec, llvm::sys::fs::F_None);
		if (outStream->has_error())
		{
			return false;
		}

		//PM.add()
		PM.add(createWriteThinLTOBitcodePass(*outStream, NULL));
	}

	//TargetPassConfig *PassConfig = target->createPassConfig(PM);
	//PM.add(new BfPass());
	//PM.add(sBfPass);

	/*if ((RelaxAll.getNumOccurrences() > 0) && (FileType != TargetMachine::CGFT_ObjectFile))
	{
		//errs() << argv[0] << ": warning: ignoring -mc-relax-all because filetype != obj";
	}*/

	// Do
	{
		//formatted_raw_ostream FOS(out);
		//raw_pwrite_stream *OS = &out->os();

		llvm::AnalysisID StartAfterID = nullptr;
		llvm::AnalysisID StopAfterID = nullptr;
		const llvm::PassRegistry *PR = llvm::PassRegistry::getPassRegistry();

		//WriteBitcode		
		bool noVerify = false; // Option

		if (!enableLTO)
		{
			// Ask the target to add backend passes as necessary.
			if (target->addPassesToEmitFile(PM, out, NULL,
				(codeGenOptions.mAsmKind != BfAsmKind_None) ? llvm::TargetMachine::CGFT_AssemblyFile : llvm::TargetMachine::CGFT_ObjectFile,
				//TargetMachine::CGFT_AssemblyFile,
				noVerify /*, StartAfterID, StopAfterID*/))
			{
				Fail("Target does not support generation of this file type");
				/*errs() << argv[0] << ": target does not support generation of this"
					<< " file type!\n";*/
				return false;
			}
		}

		bool success = PM.run(*mLLVMModule);

		if ((codeGenOptions.mOptLevel > BfOptLevel_O0) && (codeGenOptions.mWriteLLVMIR))
		{
			BP_ZONE("BfCodeGen::RunLoop.LLVM.IR");
			String fileName = outFileName;
			int dotPos = (int)fileName.LastIndexOf('.');
			if (dotPos != -1)
				fileName.RemoveToEnd(dotPos);

			fileName += "_OPT.ll";
			String irError;
			WriteIR(fileName, irError);			
		}
	}

	return true;
}

bool BfIRCodeGen::WriteIR(const StringImpl& outFileName, StringImpl& error)
{
	std::error_code ec;	
	llvm::raw_fd_ostream outStream(outFileName.c_str(), ec, llvm::sys::fs::OpenFlags::F_Text);
	if (ec)
	{
	 	error = ec.message();
		return false;
	}	
	mLLVMModule->print(outStream, NULL);
	return true;
}

int BfIRCodeGen::GetIntrinsicId(const StringImpl& name)
{
// 	llvm::Intrinsic::ID intrin = llvm::Intrinsic::getIntrinsicForGCCBuiltin("x86", name.c_str());
// 	if (intrin != llvm::Intrinsic::not_intrinsic)
// 		return (int)intrin;
	
	auto itr = std::lower_bound(std::begin(gIntrinEntries), std::end(gIntrinEntries), name);
	if (itr != std::end(gIntrinEntries) && strcmp(itr->mName, name.c_str()) == 0)
	{
		int id = (int)(itr - gIntrinEntries);
		return id;
	}

	return -1;
}

const char* BfIRCodeGen::GetIntrinsicName(int intrinId)
{
	return gIntrinEntries[intrinId].mName;
}

void BfIRCodeGen::SetAsmKind(BfAsmKind asmKind)
{
	const char* args[] = {"", (asmKind == BfAsmKind_ATT) ? "-x86-asm-syntax=att" : "-x86-asm-syntax=intel" };
	llvm::cl::ParseCommandLineOptions(2, args);
}

#ifdef BF_PLATFORM_LINUX
//HACK: I don't know why this is needed, but we get link errors if we don't have it.
int BF_LinuxFixLinkage()
{
	llvm::MCContext* ctx = NULL;
	llvm::raw_pwrite_stream* stream = NULL;

	createWasmStreamer(*ctx, NULL, NULL, NULL, false);
	createMachOStreamer(*ctx, NULL, NULL, NULL, false, false, false);
	createAsmStreamer(*ctx, NULL, false, false, NULL, NULL, NULL, false);
	createELFStreamer(*ctx, NULL, NULL, NULL, false);

	return 0;
}
#endif

//#include "aarch64/Disassembler/X86DisassemblerDecoder.h"
//#include "X86/MCTargetDesc/X86MCTargetDesc.h"
//#include "X86/MCTargetDesc/X86BaseInfo.h"
//#include "X86InstrInfo.h"

#ifdef BF_PLATFORM_MACOS
#include "AArch64/MCTargetDesc/AArch64MCTargetDesc.h"
//#include "AArch64/MCTargetDesc/AArch64BaseInfo.h"
//#include "../X86InstrInfo.h"

int BF_AARC64_Linkage()
{
	LLVMInitializeAArch64TargetInfo();
	LLVMInitializeAArch64Target();
	LLVMInitializeAArch64TargetMC();	
	return 0;
}
#endif

void BfIRCodeGen::StaticInit()
{
	LLVMInitializeX86TargetInfo();
	LLVMInitializeX86Target();
	LLVMInitializeX86TargetMC();
	LLVMInitializeX86AsmPrinter();
	LLVMInitializeX86AsmParser();
	LLVMInitializeX86Disassembler();

	LLVMInitializeARMTargetInfo();
	LLVMInitializeARMTarget();
	LLVMInitializeARMTargetMC();
	LLVMInitializeARMAsmPrinter();

	LLVMInitializeAArch64TargetInfo();
	LLVMInitializeAArch64Target();
	LLVMInitializeAArch64TargetMC();
	LLVMInitializeAArch64AsmPrinter();
	//LLVMInitializeAArch64Parser();
	//LLVMInitializeX86Disassembler();
}