compilepass.cpp
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Created: Tue, Jul 7, 12:39 PM

compilepass.cpp
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	#include "compilepass.h"
	#include "clasplayer.h"
	#include <ast.h>
	#include "llvmlayer.h"

	#include "query/containers.h"
	#include "query/context.h"
	#include "compilation/containers.h"
	#include "compilation/transformations.h"
	#include "compilation/latecontextcompiler2.h"
	#include "ExternLayer.h"
	#include "pass/adhocpass.h"
	#include "compilation/targetinterpretation.h"

	#include <boost/optional.hpp>
	#include <memory>
	#include <iostream>

	using namespace std;
	using namespace xreate;
	using namespace xreate::compilation;
	using namespace llvm;

	//TODO use Scope<TargetLlvm>

	//SECTIONTAG types/convert implementation
	//TODO type conversion:
	//a) automatically expand types int -> bigger int; int -> floating
	//b) detect exact type of `num` based on max used numeral / function type
	//c) warning if need to truncate (allow/dissalow based on annotations)

	namespace xreate {

	llvm::Value*
	doAutomaticTypeConversion(llvm::Value* source, llvm::Type* tyTarget, llvm::IRBuilder<>& builder){
	if (tyTarget->isIntegerTy() && source->getType()->isIntegerTy())
	{
	llvm::IntegerType* tyTargetInt = llvm::dyn_cast<IntegerType>(tyTarget);
	llvm::IntegerType* tySourceInt = llvm::dyn_cast<IntegerType>(source->getType());

	if (tyTargetInt->getBitWidth() < tySourceInt->getBitWidth()){
	return builder.CreateCast(llvm::Instruction::Trunc, source, tyTarget);
	}

	if (tyTargetInt->getBitWidth() > tySourceInt->getBitWidth()){
	return builder.CreateCast(llvm::Instruction::SExt, source, tyTarget);
	}
	}

	if (source->getType()->isIntegerTy() && tyTarget->isFloatingPointTy()){
	return builder.CreateCast(llvm::Instruction::SIToFP, source, tyTarget);
	}

	return source;
	}


	std::string
	BasicFunctionDecorator::prepareName(){
	AST* ast = FunctionUnit::pass->man->root;

	string name = ast->getFunctionVariants(FunctionUnit::function->__name).size() > 1?
	FunctionUnit::function->__name + std::to_string(FunctionUnit::function.id()) :
	FunctionUnit::function->__name;

	return name;
	}

	std::vector<llvm::Type*>
	BasicFunctionDecorator::prepareArguments(){
	LLVMLayer* llvm = FunctionUnit::pass->man->llvm;
	AST* ast = FunctionUnit::pass->man->root;
	CodeScope* entry = FunctionUnit::function->__entry;
	std::vector<llvm::Type*> signature;

	std::transform(entry->__bindings.begin(), entry->__bindings.end(), std::inserter(signature, signature.end()),
	[llvm, ast, entry](const std::string &arg)->llvm::Type* {
	assert(entry->__identifiers.count(arg));

	ScopedSymbol argid{entry->__identifiers.at(arg), VERSION_NONE};
	return llvm->toLLVMType(ast->expandType(entry->__declarations.at(argid).type));
	});

	return signature;
	}

	llvm::Type*
	BasicFunctionDecorator::prepareResult(){
	LLVMLayer* llvm = FunctionUnit::pass->man->llvm;
	AST* ast = FunctionUnit::pass->man->root;
	CodeScope* entry = FunctionUnit::function->__entry;

	return llvm->toLLVMType(ast->expandType(entry->__declarations.at(ScopedSymbol::RetSymbol).type));
	}

	llvm::Function::arg_iterator
	BasicFunctionDecorator::prepareBindings(){
	CodeScope* entry = FunctionUnit::function->__entry;
	CodeScopeUnit* entryCompilation = FunctionUnit::getScopeUnit(entry);
	llvm::Function::arg_iterator fargsI = FunctionUnit::raw->arg_begin();

	for (std::string &arg : entry->__bindings) {
	ScopedSymbol argid = entry->__identifiers[arg];

	entryCompilation->__rawVars[argid] = &*fargsI;
	fargsI->setName(arg);
	++fargsI;
	}

	return fargsI;
	}

	//SECTIONTAG late-context FunctionDecorator
	template<class Parent>
	class LateContextFunctionDecorator: public Parent{
	public:
	LateContextFunctionDecorator(ManagedFnPtr f, CompilePass* p)
	: Parent(f, p), contextCompiler(this, p)
	{}

	protected:
	std::vector<llvm::Type*> prepareArguments(){
	std::vector<llvm::Type*>&& arguments = Parent::prepareArguments();

	size_t sizeLateContextDemand = contextCompiler.getFunctionDemandSize();
	if (sizeLateContextDemand) {
	llvm::Type* ty32 = llvm::Type::getInt32Ty(llvm::getGlobalContext());
	llvm::Type* tyDemand = llvm::ArrayType::get(ty32, sizeLateContextDemand);

	arguments.push_back(tyDemand);
	}

	return arguments;
	}

	llvm::Function::arg_iterator prepareBindings(){
	llvm::Function::arg_iterator fargsI = Parent::prepareBindings();

	size_t sizeLateContextDemand = contextCompiler.getFunctionDemandSize();
	if (sizeLateContextDemand){
	fargsI->setName("latecontext");
	contextCompiler.rawContextArgument = &*fargsI;
	++fargsI;
	}

	return fargsI;
	}

	public:
	LateContextCompiler2 contextCompiler;

	};

	//SECTIONTAG adhoc FunctionDecorator
	template<class Parent>
	class AdhocFunctionDecorator: public Parent{
	public:
	AdhocFunctionDecorator(ManagedFnPtr f, CompilePass* p)
	: Parent(f, p) {}

	protected:
	llvm::Type* prepareResult(){
	PassManager* man = Parent::pass->man;
	CodeScope* entry = Parent::function->__entry;
	LLVMLayer* llvm = Parent::pass->man->llvm;
	AST* ast = Parent::pass->man->root;
	AdhocPass* adhocpass = reinterpret_cast<AdhocPass*>(man->getPassById(PassId::AdhocPass));

	if (! Parent::function->isPrefunction){
	return Parent::prepareResult();
	}

	adhocImplementation = adhocpass->determineForScope(entry);
	return llvm->toLLVMType(ast->expandType(adhocImplementation->getResultType()));
	}

	public:
	AdhocScheme* adhocImplementation=nullptr;

	};

	typedef LateContextFunctionDecorator<
	AdhocFunctionDecorator<
	BasicFunctionDecorator>> DefaultFunctionUnit;


	CodeScopeUnit::CodeScopeUnit(CodeScope* codeScope, FunctionUnit* f, CompilePass* compilePass)
	: scope(codeScope), pass(compilePass), function(f)
	{}


	llvm::Value*
	CallStatementRaw::operator() (std::vector<llvm::Value *>&& args, const std::string& hintDecl) {
	llvm::Function* calleeInfo = dyn_cast<llvm::Function>(__callee);

	if (calleeInfo){
	auto argsFormal = calleeInfo->args();

	int pos=0;
	//SECTIONTAG types/convert function ret value
	for (auto argFormal = argsFormal.begin(); argFormal!=argsFormal.end(); ++argFormal, ++pos){
	args[pos] = doAutomaticTypeConversion(args[pos], argFormal->getType(), llvm->builder);
	}
	}

	return llvm->builder.CreateCall(__calleeTy, __callee, args, hintDecl);
	}

	//DEBT implement inlining
	class CallStatementInline: public CallStatement{
	public:
	CallStatementInline(FunctionUnit* caller, FunctionUnit* callee, LLVMLayer* l)
	: __caller(caller), __callee(callee), llvm(l) {}

	llvm::Value* operator() (std::vector<llvm::Value *>&& args, const std::string& hintDecl) {
	//TOTEST inlining
	// CodeScopeUnit* entryCompilation = outer->getScopeUnit(function->__entry);
	// for(int i=0, size = args.size(); i<size; ++i) {
	// entryCompilation->bindArg(args.at(i), string(entryCompilation->scope->__bindings.at(i)));
	// }
	//
	//
	// return entryCompilation->compile();
	}

	private:
	FunctionUnit* __caller;
	FunctionUnit* __callee;
	LLVMLayer* llvm;

	bool isInline(){
	// Symbol ret = Symbol{0, function->__entry};
	// bool flagOnTheFly = SymbolAttachments::get<IsImplementationOnTheFly>(ret, false);
	//TODO consider inlining
	return false;
	}
	};


	}

	void
	CodeScopeUnit::overrideDeclaration(const Symbol binding, Expression&& declaration){
	function->getScopeUnit(binding.scope)->__declarationsOverriden.emplace(binding.identifier, move(declaration));
	}

	//SECTIONTAG late-context find callee function
	//TOTEST static late context decisions
	//TOTEST dynamic late context decisions

	CallStatement*
	CodeScopeUnit::findFunction(const std::string& calleeName){
	LLVMLayer* llvm = pass->man->llvm;
	ClaspLayer* clasp = pass->man->clasp;
	DefaultFunctionUnit* function = dynamic_cast<DefaultFunctionUnit*>(this->function);
	ContextQuery* queryContext = pass->queryContext;

	const std::list<ManagedFnPtr>& specializations = pass->man->root->getFunctionVariants(calleeName);

	//if no specializations registered - check external function
	if (specializations.size()==0){
	llvm::Function* external = llvm->layerExtern->lookupFunction(calleeName);

	return new CallStatementRaw(external, llvm);
	}

	//no decisions required
	if (specializations.size()==1){
	if (!specializations.front()->guardContext.isValid()) {
	return new CallStatementRaw( pass->getFunctionUnit(specializations.front())->compile(), llvm);
	}
	}

	//TODO move dictSpecialization over to a separate function in order to perform cache, etc.
	//prepare specializations dictionary
	std::map<Expression, ManagedFnPtr> dictSpecializations;

	boost::optional<ManagedFnPtr> variantDefault;
	boost::optional<ManagedFnPtr> variant;

	for(const ManagedFnPtr& f: specializations){
	const Expression& guard = f->guardContext;

	//default case:
	if (!guard.isValid()){
	variantDefault = f;
	continue;
	}

	assert(dictSpecializations.emplace(guard, f).second && "Found several identical specializations");
	}

	//check static context
	ScopePacked scopeCaller = clasp->pack(this->scope);
	const string atomSpecialization = "specialization";
	const Expression topicSpecialization(Operator::CALL, {(Atom<Identifier_t>(string(atomSpecialization))), (Atom<Identifier_t>(string(calleeName))), (Atom<Number_t>(scopeCaller))});

	const Decisions& decisions = queryContext->getFinalDecisions(scopeCaller);
	if (decisions.count(topicSpecialization)){
	variant = dictSpecializations.at(decisions.at(topicSpecialization));
	}

	//TODO check only demand for this particular topic.
	size_t sizeDemand = function->contextCompiler.getFunctionDemandSize();

	//decision made if static context found or no late context exists(and there is default variant)
	bool flagHasStaticDecision = variant \|\| (variantDefault && !sizeDemand);

	//if no late context exists
	if (flagHasStaticDecision) {
	FunctionUnit* calleeUnit = pass->getFunctionUnit(variant? variant: variantDefault);

	//inlining possible based on static decision only
	// if (calleeUnit->isInline()) {
	// return new CallStatementInline(function, calleeUnit);
	// }

	return new CallStatementRaw(calleeUnit->compile(), llvm);
	}

	//require default variant if no static decision made
	assert(variantDefault);

	llvm::Function* functionVariantDefault = this->pass->getFunctionUnit(*variantDefault)->compile();
	llvm::Value* resultFn = function->contextCompiler.findFunction(calleeName, functionVariantDefault, scopeCaller);
	llvm::PointerType *resultPTy = cast<llvm::PointerType>(resultFn->getType());
	llvm::FunctionType *resultFTy = cast<llvm::FunctionType>(resultPTy->getElementType());
	return new CallStatementRaw(resultFn, resultFTy, llvm);
	}

	void
	CodeScopeUnit::bindArg(llvm::Value* value, std::string&& alias)
	{
	//reset cached compiled value if any
	raw = nullptr;

	//ensure existing of an alias
	assert(scope->__identifiers.count(alias));

	//memorize new value for an alias
	ScopedSymbol id = scope->__identifiers.at(alias);
	__rawVars[id] = value;
	}

	llvm::Value*
	CodeScopeUnit::process(const Expression& expr, const std::string& hintVarDecl){

	Context ctx{this, this->function, this->pass};

	if (pass->targetInterpretation->isAcceptable(expr)){
	return pass->targetInterpretation->compile(expr, ctx);
	}

	llvm::Value* result = processLowlevel(expr, hintVarDecl);

	if (pass->transformations->isAcceptable(expr)){
	return pass->transformations->transform(expr, result, ctx);
	}

	return result;
	}

	llvm::Value*
	CodeScopeUnit::processLowlevel(const Expression& expr, const std::string& hintVarDecl){
	#define DEFAULT(x) (hintVarDecl.empty()? x: hintVarDecl)
	llvm::Value left; llvm::Value right;
	LLVMLayer& l = *pass->man->llvm;
	xreate::compilation::Advanced instructions = xreate::compilation::Advanced({this, function, pass});

	switch (expr.op) {
	case Operator::ADD: case Operator::SUB: case Operator::MUL:
	case Operator::DIV: case Operator::EQU: case Operator::LSS:
	case Operator::GTR: case Operator::NE: case Operator::LSE:
	case Operator::GTE:

	assert(expr.__state == Expression::COMPOUND);
	assert(expr.operands.size() == 2);

	left = process(expr.operands[0]);
	right = process(expr.operands[1]);

	//SECTIONTAG types/convert binary operation
	right = doAutomaticTypeConversion(right, left->getType(), l.builder);
	break;

	default:;
	}

	switch (expr.op) {
	case Operator::ADD:
	return l.builder.CreateAdd(left, right, DEFAULT("tmp_add"));
	break;

	case Operator::SUB:
	return l.builder.CreateSub(left, right, DEFAULT("tmp_sub"));
	break;

	case Operator::MUL:
	return l.builder.CreateMul(left, right, DEFAULT("tmp_mul"));
	break;

	case Operator::DIV:
	return l.builder.CreateSDiv(left, right, DEFAULT("tmp_div"));
	break;

	case Operator::EQU:
	if (left->getType()->isIntegerTy()) return l.builder.CreateICmpEQ(left, right, DEFAULT("tmp_equ"));
	if (left->getType()->isFloatingPointTy()) return l.builder.CreateFCmpOEQ(left, right, DEFAULT("tmp_equ"));
	break;

	case Operator::NE:
	return l.builder.CreateICmpNE(left, right, DEFAULT("tmp_ne"));
	break;

	case Operator::LSS:
	return l.builder.CreateICmpSLT(left, right, DEFAULT("tmp_lss"));
	break;

	case Operator::LSE:
	return l.builder.CreateICmpSLE(left, right, DEFAULT("tmp_lse"));
	break;

	case Operator::GTR:
	return l.builder.CreateICmpSGT(left, right, DEFAULT("tmp_gtr"));
	break;

	case Operator::GTE:
	return l.builder.CreateICmpSGE(left, right, DEFAULT("tmp_gte"));
	break;

	case Operator::NEG:
	left = process(expr.operands[0]);
	return l.builder.CreateNeg(left, DEFAULT("tmp_neg"));
	break;

	case Operator::CALL: {
	assert(expr.__state == Expression::COMPOUND);

	std::string nameCallee = expr.getValueString();
	shared_ptr<CallStatement> callee(findFunction(nameCallee));

	//prepare arguments
	std::vector<llvm::Value *> args;
	args.reserve(expr.operands.size());

	std::transform(expr.operands.begin(), expr.operands.end(), std::inserter(args, args.end()),
	[this](const Expression &operand) {
	return process(operand);
	}
	);

	ScopePacked outerScopeId = pass->man->clasp->pack(this->scope);

	//TASK a) refactor CALL/ADHOC/find function
	//SECTIONTAG late-context propagation arg
	size_t calleeDemandSize = pass->queryContext->getFunctionDemand(nameCallee).size();
	if (calleeDemandSize){
	DefaultFunctionUnit* function = dynamic_cast<DefaultFunctionUnit*>(this->function);
	llvm::Value* argLateContext = function->contextCompiler.compileContextArgument(nameCallee, outerScopeId);
	args.push_back(argLateContext);
	}

	return (*callee)(move(args), DEFAULT("res_"+nameCallee));
	}

	case Operator::IF:
	{
	return instructions.compileIf(expr, DEFAULT("tmp_if"));
	}

	case Operator::SWITCH:
	{
	return instructions.compileSwitch(expr, DEFAULT("tmp_switch"));
	}

	case Operator::LOOP_CONTEXT:
	{
	return instructions.compileLoopContext(expr, DEFAULT("tmp_loop"));
	}

	case Operator::LOGIC_AND: {
	assert(expr.operands.size() == 1);
	return process (expr.operands[0]);
	}

	case Operator::LIST:
	{
	return instructions.compileListAsSolidArray(expr, DEFAULT("tmp_list"));
	};

	case Operator::LIST_RANGE:
	{
	assert(false); //no compilation phase for a range list
	// return InstructionList(this).compileConstantArray(expr, l, hintRetVar);
	};

	case Operator::LIST_NAMED:
	{
	typedef Expanded<TypeAnnotation> ExpandedType;

	ExpandedType tyRaw = l.ast->expandType(expr.type);

	const std::vector<string> fields = (tyRaw.get().__operator == TypeOperator::CUSTOM)?
	l.layerExtern->getStructFields(l.layerExtern->lookupType(tyRaw.get().__valueCustom))
	: tyRaw.get().fields;

	std::map<std::string, size_t> indexFields;
	for(size_t i=0, size = fields.size(); i<size; ++i){
	indexFields.emplace(fields[i], i);
	}

	llvm::StructType* tyRecord = llvm::cast<llvm::StructType>(l.toLLVMType(tyRaw));
	llvm::Value* record = llvm::UndefValue::get(tyRecord);

	for (size_t i=0; i<expr.operands.size(); ++i){
	const Expression& operand = expr.operands.at(i);
	unsigned int fieldId = indexFields.at(expr.bindings.at(i));

	llvm::Value* result = 0;

	//TODO Null ad hoc Llvm implementation
	// if (operand.isNone()){
	// llvm::Type* tyNullField = tyRecord->getElementType(fieldId);
	// result = llvm::UndefValue::get(tyNullField);
	//
	// } else {
	result = process(operand);
	// }

	assert (result);
	record = l.builder.CreateInsertValue(record, result, llvm::ArrayRef<unsigned>({fieldId}));
	}

	return record;
	};



	case Operator::MAP:
	{
	assert(expr.blocks.size());
	return instructions.compileMapSolidOutput(expr, DEFAULT("map"));
	};

	case Operator::FOLD:
	{
	return instructions.compileFold(expr, DEFAULT("fold"));
	};

	case Operator::FOLD_INF:
	{
	return instructions.compileFoldInf(expr, DEFAULT("fold"));
	};

	case Operator::INDEX:
	{
	//TODO allow multiindex
	assert(expr.operands.size()==2);
	assert(expr.operands[0].__state == Expression::IDENT);

	const std::string& hintIdent= expr.operands[0].getValueString();
	Symbol s = Attachments::get<Symbol>(expr.operands[0]);
	const ExpandedType& t2 = pass->man->root->expandType(CodeScope::findDeclaration(s).type);

	llvm::Value* aggr = compileSymbol(s, hintIdent);

	switch (t2.get().__operator)
	{
	case TypeOperator::STRUCT: case TypeOperator::CUSTOM:
	{
	const Expression& idx = expr.operands.at(1);
	assert(idx.__state == Expression::STRING);
	std::string idxField = idx.getValueString();

	return instructions.compileStructIndex(aggr, t2, idxField);
	};

	case TypeOperator::ARRAY: {
	std::vector<llvm::Value*> indexes;
	std::transform(++expr.operands.begin(), expr.operands.end(), std::inserter(indexes, indexes.end()),
	[this] (const Expression& op){
	return process(op);
	}
	);

	return instructions.compileArrayIndex(aggr, indexes, DEFAULT(string("el_") + hintIdent));
	};

	default:
	assert(false);
	}
	};

	//SECTIONTAG adhoc actual compilation
	//TODO a) make sure that it's correct: function->adhocImplementation built for Entry scope and used in another scope
	case Operator::ADHOC: {
	DefaultFunctionUnit* function = dynamic_cast<DefaultFunctionUnit*>(this->function);
	assert(function->adhocImplementation && "Adhoc implementation not found");
	string comm = expr.operands[0].getValueString();

	CodeScope* scope = function->adhocImplementation->getImplementationForCommand(comm);
	CodeScopeUnit* unitScope = function->getScopeUnit(scope);

	//SECTIONTAG types/convert ADHOC ret convertation
	llvm::Type* resultTy = l.toLLVMType( pass->man->root->expandType(function->adhocImplementation->getResultType()));
	return doAutomaticTypeConversion(unitScope->compile(), resultTy, l.builder);
	};

	case Operator::NONE:
	assert(expr.__state != Expression::COMPOUND);

	switch (expr.__state) {
	case Expression::IDENT: {
	Symbol s = Attachments::get<Symbol>(expr);
	return compileSymbol(s, expr.getValueString());
	}

	case Expression::NUMBER: {
	int literal = expr.getValueDouble();
	return llvm::ConstantInt::get(llvm::Type::getInt32Ty(llvm::getGlobalContext()), literal);
	}

	case Expression::STRING: {
	return instructions.compileConstantStringAsPChar(expr.getValueString(), DEFAULT("tmp_str"));
	};

	case Expression::VARIANT: {
	const ExpandedType& typVariant = pass->man->root->expandType(expr.type);
	llvm::Type* typRaw = l.toLLVMType(typVariant);
	int value = expr.getValueDouble();
	return llvm::ConstantInt::get(typRaw, value);
	}

	default: {
	break;
	}
	};

	break;

	default: break;

	}

	assert(false);
	return 0;
	}

	llvm::Value*
	CodeScopeUnit::compile(const std::string& hintBlockDecl){
	if (raw != nullptr) return raw;


	if (!hintBlockDecl.empty()) {
	llvm::BasicBlock *block = llvm::BasicBlock::Create(llvm::getGlobalContext(), hintBlockDecl, function->raw);
	pass->man->llvm->builder.SetInsertPoint(block);
	}

	raw = process(scope->getBody());
	return raw;
	}

	llvm::Value*
	CodeScopeUnit::compileSymbol(const Symbol& s, std::string hintRetVar)
	{
	CodeScope* scope = s.scope;
	CodeScopeUnit* self = function->getScopeUnit(scope);

	if (self->__rawVars.count(s.identifier)) {
	return self->__rawVars[s.identifier];
	}

	//compilation transformations could override symbol declarations.
	Expression declaration = CodeScope::findDeclaration(s);
	if (!declaration.isDefined()){
	if (self->__declarationsOverriden.count(s.identifier)){
	declaration = self->__declarationsOverriden[s.identifier];

	} else {
	assert(false); //in case of bindings there should be raws already.
	}
	}

	return self->__rawVars[s.identifier] = self->process(declaration, hintRetVar);
	}



	llvm::Function*
	FunctionUnit::compile(){
	if (raw != nullptr) return raw;

	LLVMLayer* llvm = pass->man->llvm;
	llvm::IRBuilder<>& builder = llvm->builder;

	string&& functionName = prepareName();
	std::vector<llvm::Type*>&& types = prepareArguments();
	llvm::Type* expectedResultType = prepareResult();

	llvm::FunctionType *ft = llvm::FunctionType::get(expectedResultType, types, false);
	raw = llvm::cast<llvm::Function>(llvm->module->getOrInsertFunction(functionName, ft));
	prepareBindings();


	const std::string&blockName = "entry";
	llvm::BasicBlock* blockCurrent = builder.GetInsertBlock();

	llvm::Value* result =getScopeUnit(function->__entry)->compile(blockName);
	assert(result);

	//SECTIONTAG types/convert function ret value
	builder.CreateRet(doAutomaticTypeConversion(result, expectedResultType, llvm->builder));

	if (blockCurrent){
	builder.SetInsertPoint(blockCurrent);
	}

	llvm->moveToGarbage(ft);
	return raw;
	}

	CodeScopeUnit*
	FunctionUnit::getScopeUnit(CodeScope* scope){
	if (!scopes.count(scope)){
	CodeScopeUnit* unit = new CodeScopeUnit(scope, this, pass);
	scopes.emplace(scope, std::unique_ptr<CodeScopeUnit>(unit));
	}

	return scopes.at(scope).get();
	}

	CodeScopeUnit*
	FunctionUnit::getEntry(){
	return getScopeUnit(function->getEntryScope());
	}

	CodeScopeUnit*
	FunctionUnit::getScopeUnit(ManagedScpPtr scope){
	return getScopeUnit(&*scope);
	}

	FunctionUnit*
	CompilePass::getFunctionUnit(const ManagedFnPtr& function){
	unsigned int id = function.id();

	if (!functions.count(id)){
	FunctionUnit* unit = new DefaultFunctionUnit(function, this);
	functions.emplace(id, unit);
	return unit;
	}

	return functions.at(id);
	}

	void
	CompilePass::run(){
	transformations = new Transformations(this);
	transformations->registerTransformer(new TransformerSaturation(transformations));

	targetInterpretation = new TargetInterpretation(this->man->root, this);

	queryContext = reinterpret_cast<ContextQuery*> (man->clasp->getQuery(QueryId::ContextQuery));

	//Find out main function;
	ClaspLayer::ModelFragment model = man->clasp->query(Config::get("function-entry"));
	assert(model && "Error: No entry function found");
	assert(model->first != model->second && "Error: Ambiguous entry function");

	string nameMain = std::get<0>(ClaspLayer::parse<std::string>(model->first->second));
	FunctionUnit* unitMain = getFunctionUnit(man->root->findFunction(nameMain));
	entry = unitMain->compile();
	}

	llvm::Function*
	CompilePass::getEntryFunction(){
	assert(entry);
	return entry;
	}

	void
	CompilePass::prepareQueries(ClaspLayer* clasp){
	clasp->registerQuery(new containers::Query(), QueryId::ContainersQuery);
	clasp->registerQuery(new ContextQuery(), QueryId::ContextQuery);
	}

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