compilepass.cpp
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Created: Tue, Jul 7, 3:53 PM

compilepass.cpp
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	/* This Source Code Form is subject to the terms of the Mozilla Public
	* License, v. 2.0. If a copy of the MPL was not distributed with this
	* file, You can obtain one at http://mozilla.org/MPL/2.0/.
	*
	* Author: pgess <v.melnychenko@xreate.org>
	*/

	/**
	* \file compilepass.h
	* \brief Main compilation routine. See \ref xreate::CompilePass
	*/

	#include "compilepass.h"
	#include "transcendlayer.h"
	#include "ast.h"
	#include "llvmlayer.h"

	#include "compilation/decorators.h"
	#include "compilation/pointers.h"
	#include "analysis/typeinference.h"
	#include "compilation/control.h"
	#include "compilation/demand.h"
	#include "analysis/resources.h"
	#ifdef XREATE_ENABLE_EXTERN
	#include "ExternLayer.h"
	#endif

	#include "compilation/containers.h"
	#include "compilation/containers/arrays.h"

	#ifndef XREATE_CONFIG_MIN
	#include "query/containers.h"

	#include "pass/versionspass.h"
	#include "compilation/targetinterpretation.h"
	#endif

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

	using namespace std;
	using namespace llvm;
	using namespace xreate::typehints;
	using namespace xreate::containers;

	namespace xreate{
	namespace compilation{
	#define DEFAULT(x) (hintAlias.empty()? x: hintAlias)

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

	string name = ast->getFnSpecializations(__function->__name).size() > 1 ?
	__function->__name + std::to_string(__function.id()) :
	__function->__name;

	return name;
	}

	std::vector<llvm::Type*>
	BasicBruteFunction::prepareSignature() {
	CodeScope* entry = __function->__entry;

	return getScopeSignature(entry);
	}

	llvm::Type*
	BasicBruteFunction::prepareResult() {
	LLVMLayer* llvm = IBruteFunction::pass->man->llvm;
	AST* ast = IBruteFunction::pass->man->root;
	CodeScope* entry = __function->__entry;
	const Expression retE = entry->__declarations.at(ScopedSymbol::RetSymbol);
	const ExpandedType& retT = ast->getType(retE);
	return llvm->toLLVMType(retT, retE);
	}

	llvm::Function::arg_iterator
	BasicBruteFunction::prepareBindings() {
	CodeScope* entry = __function->__entry;
	IBruteScope* entryCompilation = IBruteFunction::getBruteScope(entry);
	llvm::Function::arg_iterator fargsI = IBruteFunction::raw->arg_begin();

	for (std::string &arg : entry->__bindings) {
	ScopedSymbol argid{entry->__identifiers[arg], versions::VERSION_NONE};

	entryCompilation->bindArg(&*fargsI, argid);
	fargsI->setName(arg);
	++fargsI;
	}

	return fargsI;
	}

	void
	BasicBruteFunction::applyAttributes(){}

	IBruteScope::IBruteScope(const CodeScope * const codeScope, IBruteFunction* f, CompilePass* compilePass)
	: pass(compilePass), function(f), scope(codeScope), lastBlockRaw(nullptr) { }

	llvm::Value*
	BruteFnInvocation::operator()(std::vector<llvm::Value *>&& args, const std::string& hintDecl) {
	if (__calleeTy) {
	auto argsFormalT = __calleeTy->params();
	size_t sizeArgsF = __calleeTy->getNumParams();
	assert(args.size() >= sizeArgsF);
	assert(__calleeTy->isVarArg() \|\| args.size() == sizeArgsF);

	auto argFormalT = argsFormalT.begin();
	for(size_t argId = 0; argId < args.size(); ++argId){
	if(argFormalT != argsFormalT.end()){
	args[argId] = typeinference::doAutomaticTypeConversion(
	args.at(argId), *argFormalT, llvm->irBuilder);
	++argFormalT;
	}
	}
	}

	//Do not name function call that returns Void.
	std::string hintName = (!__calleeTy->getReturnType()->isVoidTy()) ? hintDecl : "";
	return llvm->irBuilder.CreateCall(__calleeTy, __callee, args, hintName);
	}

	llvm::Value*
	HiddenArgsFnInvocation::operator() (std::vector<llvm::Value *>&& args, const std::string& hintDecl) {
	args.insert(args.end(), __args.begin(), __args.end());
	return __parent->operator ()(std::move(args), hintDecl);
	}

	class CallStatementInline : public IFnInvocation{
	public:

	CallStatementInline(IBruteFunction* caller, IBruteFunction* callee, LLVMLayer* l)
	: __caller(caller), __callee(callee), llvm(l) { }

	llvm::Value* operator()(std::vector<llvm::Value *>&& args, const std::string& hintDecl) {
	return nullptr;
	}

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

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

	BasicBruteScope::BasicBruteScope(const CodeScope * const codeScope, IBruteFunction* f, CompilePass* compilePass)
	: IBruteScope(codeScope, f, compilePass) { }

	llvm::Value*
	BasicBruteScope::processSymbol(const Symbol& s, std::string hintRetVar) {
	Expression declaration = CodeScope::getDefinition(s);
	const CodeScope* scopeExternal = s.scope;
	IBruteScope* scopeBruteExternal = IBruteScope::function->getBruteScope(scopeExternal);
	assert(scopeBruteExternal->lastBlockRaw);

	llvm::Value* resultRaw;
	llvm::BasicBlock* blockOwn = pass->man->llvm->irBuilder.GetInsertBlock();

	if (scopeBruteExternal->lastBlockRaw == blockOwn) {
	resultRaw = scopeBruteExternal->process(declaration, hintRetVar);
	scopeBruteExternal->lastBlockRaw = lastBlockRaw =
	pass->man->llvm->irBuilder.GetInsertBlock();

	} else {
	pass->man->llvm->irBuilder.SetInsertPoint(scopeBruteExternal->lastBlockRaw);
	resultRaw = scopeBruteExternal->processSymbol(s, hintRetVar);
	pass->man->llvm->irBuilder.SetInsertPoint(blockOwn);
	}

	return resultRaw;
	}

	IFnInvocation*
	BasicBruteScope::findFunction(const Expression& opCall) {
	const std::string& calleeName = opCall.getValueString();
	LLVMLayer* llvm = pass->man->llvm;
	const std::list<ManagedFnPtr>& specializations = pass->man->root->getFnSpecializations(calleeName);

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

	llvm::outs() << "Debug/External function: " << calleeName;
	external->getType()->print(llvm::outs(), true);
	llvm::outs() << "\n";

	return new BruteFnInvocation(external, llvm);
	}
	#endif

	//There should be only one specialization without any valid guards at this point
	return new BruteFnInvocation(pass->getBruteFn(
	pass->man->root->findFunction(calleeName))->compile(),
	llvm);
	}

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

	llvm::Value*
	BasicBruteScope::process(const Expression& expr, const std::string& hintAlias, const TypeAnnotation& expectedT) {
	llvm::Value *leftRaw;
	llvm::Value *rightRaw;
	LLVMLayer& l = *pass->man->llvm;
	Context ctx{this, function, pass};
	xreate::compilation::ControlIR controlIR = xreate::compilation::ControlIR({this, function, pass});

	switch (expr.op) {
	case Operator::ADD:
	case Operator::SUB: case Operator::MUL: case Operator::MOD:
	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);

	leftRaw = process(expr.operands.at(0));
	rightRaw = process(expr.operands.at(1));

	break;

	default:;
	}

	switch (expr.op) {
	case Operator::AND:
	{
	assert(expr.operands.size());
	llvm::Value* resultRaw = process(expr.operands.at(0));
	if (expr.operands.size() == 1) return resultRaw;

	for(size_t i=1; i< expr.operands.size()-1; ++i){
	resultRaw = l.irBuilder.CreateAnd(resultRaw, process(expr.operands.at(i)));
	}
	return l.irBuilder.CreateAnd(resultRaw, process(expr.operands.at(expr.operands.size()-1)), hintAlias);
	}

	case Operator::OR:
	{
	assert(expr.operands.size());
	llvm::Value* resultRaw = process(expr.operands.at(0));
	if (expr.operands.size() == 1) return resultRaw;

	for(size_t i=1; i< expr.operands.size()-1; ++i){
	resultRaw = l.irBuilder.CreateOr(resultRaw, process(expr.operands.at(i)));
	}
	return l.irBuilder.CreateOr(resultRaw, process(expr.operands.at(expr.operands.size()-1)), hintAlias);
	}

	case Operator::ADD:
	{
	return l.irBuilder.CreateAdd(leftRaw, rightRaw, hintAlias);
	}

	case Operator::SUB:
	return l.irBuilder.CreateSub(leftRaw, rightRaw, hintAlias);
	break;

	case Operator::MUL:
	return l.irBuilder.CreateMul(leftRaw, rightRaw, hintAlias);
	break;

	case Operator::DIV:
	if (leftRaw->getType()->isIntegerTy()) return l.irBuilder.CreateSDiv(leftRaw, rightRaw, hintAlias);
	if (leftRaw->getType()->isFloatingPointTy()) return l.irBuilder.CreateFDiv(leftRaw, rightRaw, hintAlias);
	break;

	case Operator::MOD:{
	return l.irBuilder.CreateSRem(leftRaw, rightRaw, hintAlias);
	}

	case Operator::EQU: {
	if (leftRaw->getType()->isIntegerTy()) return l.irBuilder.CreateICmpEQ(leftRaw, rightRaw, hintAlias);
	if (leftRaw->getType()->isFloatingPointTy()) return l.irBuilder.CreateFCmpOEQ(leftRaw, rightRaw, hintAlias);

	const ExpandedType& leftT = pass->man->root->getType(expr.operands[0]);
	const ExpandedType& rightT = pass->man->root->getType(expr.operands[1]);

	if(leftT->__operator == TypeOperator::VARIANT && rightT->__operator == TypeOperator::VARIANT){
	llvm::Type* selectorT = llvm::cast<llvm::StructType>(leftRaw->getType())->getElementType(0);
	llvm::Value* leftUnwapped = typeinference::doAutomaticTypeConversion(leftRaw, selectorT, l.irBuilder);
	llvm::Value* rightUnwapped = typeinference::doAutomaticTypeConversion(rightRaw, selectorT, l.irBuilder);
	return l.irBuilder.CreateICmpEQ(leftUnwapped, rightUnwapped, hintAlias);
	}
	break;
	}

	case Operator::NE:
	return l.irBuilder.CreateICmpNE(leftRaw, rightRaw, hintAlias);
	break;

	case Operator::LSS:
	return l.irBuilder.CreateICmpSLT(leftRaw, rightRaw, hintAlias);
	break;

	case Operator::LSE:
	return l.irBuilder.CreateICmpSLE(leftRaw, rightRaw, hintAlias);
	break;

	case Operator::GTR:
	return l.irBuilder.CreateICmpSGT(leftRaw, rightRaw, hintAlias);
	break;

	case Operator::GTE:
	return l.irBuilder.CreateICmpSGE(leftRaw, rightRaw, hintAlias);
	break;

	case Operator::NEG:
	{
	leftRaw = process(expr.operands[0]);
	ExpandedType leftTy = pass->man->root->getType(expr.operands[0]);

	if (leftTy->__value == TypePrimitive::Bool){
	return l.irBuilder.CreateNot(leftRaw, hintAlias);
	} else {
	return l.irBuilder.CreateNeg(leftRaw, hintAlias);
	}
	break;
	}

	case Operator::CALL:
	{
	assert(expr.__state == Expression::COMPOUND);
	shared_ptr<IFnInvocation> callee(findFunction(expr));
	const std::string& nameCallee = expr.getValueString();

	//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);
	}
	);

	return (*callee)(move(args), hintAlias);
	}

	case Operator::IF:
	{
	return controlIR.compileIf(expr, hintAlias);
	}

	case Operator::SWITCH:
	{
	return controlIR.compileSwitch(expr, hintAlias);
	}

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

	case Operator::LIST: //init record or array
	{
	ExpandedType exprT = l.ast->getType(expr, expectedT);
	TypesHelper helper(pass->man->llvm);

	enum {RECORD, ARRAY} kind;
	if (helper.isArrayT(exprT)){
	kind = ARRAY;

	} else if (helper.isRecordT(exprT)){
	kind = RECORD;
	} else {
	assert(false && "Inapproriate type");
	}

	#ifdef XREATE_ENABLE_EXTERN
	if (exprT->__operator == TypeOperator::ALIAS){
	if (l.layerExtern->isArrayType(exprT->__valueCustom)){
	flagIsArray = true;
	break;
	}

	if (l.layerExtern->isRecordType(exprT->__valueCustom)){
	flagIsArray = false;
	break;
	}

	assert(false && "Inapproriate external type");
	}
	#endif

	switch(kind){
	case RECORD:{
	const std::vector<string> fieldsFormal = helper.getRecordFields(exprT);
	containers::RecordIR irRecords(ctx);
	llvm::StructType *recordTRaw = llvm::cast<llvm::StructType>(l.toLLVMType(exprT));
	llvm::Value *resultRaw = irRecords.init(recordTRaw);
	return irRecords.update(resultRaw, exprT, expr);
	}

	case ARRAY: {
	std::unique_ptr<containers::IContainersIR> containerIR(
	containers::IContainersIR::create(expr, expectedT, ctx));
	llvm::Value* aggrRaw = containerIR->init(hintAlias);
	return containerIR->update(aggrRaw, expr, hintAlias);
	}
	}
	break;
	};

	case Operator::LIST_RANGE:
	{
	containers::RangeIR compiler(ctx);
	const ExpandedType& aggrT = pass->man->root->getType(expr);

	return compiler.init(expr, aggrT, hintAlias);
	};

	case Operator::MAP:
	{
	assert(expr.blocks.size());

	containers::ImplementationType implType = containers::IContainersIR::getImplementation(expr, pass->man->root);

	switch(implType){
	case containers::ImplementationType::SOLID: {
	ExpandedType exprT = pass->man->root->getType(expr, expectedT);
	ArrayHint hint = find(expr, ArrayHint{});

	containers::ArrayIR compiler(exprT, hint, ctx);
	return compiler.operatorMap(expr, hintAlias);
	}

	case containers::ImplementationType::ON_THE_FLY:{
	FlyHint hint = find<FlyHint>(expr, {});
	containers::FlyIR compiler(hint, ctx);

	return compiler.operatorMap(expr, hintAlias);
	}

	default:
	break;
	}
	assert(false && "Operator MAP does not support this container impl");
	return nullptr;
	};

	case Operator::FOLD:
	{
	return controlIR.compileFold(expr, hintAlias);
	};

	case Operator::FOLD_INF:
	{
	return controlIR.compileFoldInf(expr, hintAlias);
	};

	case Operator::INDEX:
	{
	assert(expr.operands.size() > 1);

	const Expression& aggrE = expr.operands[0];
	const ExpandedType& aggrT = pass->man->root->getType(aggrE);
	llvm::Value* aggrRaw = process(aggrE);
	switch (aggrT->__operator) {
	case TypeOperator::RECORD:
	{
	list<string> fieldsList;
	for(auto opIt = ++expr.operands.begin(); opIt!=expr.operands.end(); ++opIt){
	fieldsList.push_back(getIndexStr(*opIt));
	}

	return controlIR.compileStructIndex(aggrRaw, aggrT, fieldsList);
	};

	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);
	}
	);

	std::unique_ptr<containers::IContainersIR> containersIR(
	containers::IContainersIR::create(aggrE, expectedT, ctx)
	);

	containers::ArrayIR* arraysIR = static_cast<containers::ArrayIR*>(containersIR.get());
	return arraysIR->get(aggrRaw, indexes, hintAlias);
	};

	default:
	assert(false);
	}
	};

	case Operator::CALL_INTRINSIC:
	{
	// const std::string op = expr.getValueString();
	//
	// if (op == "copy") {
	// llvm::Value* result = process(expr.getOperands().at(0));
	//
	// auto decoratorVersions = Decorators<VersionsScopeDecoratorTag>::getInterface(this);
	// llvm::Value* storage = decoratorVersions->processIntrinsicInit(result->getType());
	// decoratorVersions->processIntrinsicCopy(result, storage);
	//
	// return l.irBuilder.CreateLoad(storage, hintAlias);
	// }

	assert(false && "undefined intrinsic");
	}

	case Operator::QUERY:
	case Operator::QUERY_LATE:
	{
	assert(false && "Should be processed by interpretation");
	}

	case Operator::VARIANT:
	{
	const ExpandedType& typResult = pass->man->root->getType(expr);
	llvm::Type* typResultRaw = l.toLLVMType(typResult);
	llvm::Type* typIdRaw = llvm::cast<llvm::StructType>(typResultRaw)->getElementType(0);

	uint64_t id = expr.getValueDouble();
	llvm::Value* resultRaw = llvm::UndefValue::get(typResultRaw);
	resultRaw = l.irBuilder.CreateInsertValue(resultRaw, llvm::ConstantInt::get(typIdRaw, id), llvm::ArrayRef<unsigned>({0}));

	const ExpandedType& typVariant = ExpandedType(typResult->__operands.at(id));
	llvm::Type* typVariantRaw = l.toLLVMType(typVariant);
	llvm::Value* variantRaw = llvm::UndefValue::get(typVariantRaw);
	assert(expr.operands.size() == typVariant->__operands.size() && "Wrong variant arguments count");
	if (!typVariant->__operands.size()) return resultRaw;

	for (unsigned int fieldId = 0; fieldId < expr.operands.size(); ++fieldId) {
	const ExpandedType& typField = ExpandedType(typVariant->__operands.at(fieldId));
	Attachments::put<TypeInferred>(expr.operands.at(fieldId), typField);
	llvm::Value* fieldRaw = process(expr.operands.at(fieldId));
	assert(fieldRaw);

	variantRaw = l.irBuilder.CreateInsertValue(variantRaw, fieldRaw, llvm::ArrayRef<unsigned>({fieldId}));
	}

	llvm::Type* typStorageRaw = llvm::cast<llvm::StructType>(typResultRaw)->getElementType(1);
	llvm::Value* addrAsStorage = l.irBuilder.CreateAlloca(typStorageRaw);
	llvm::Value* addrAsVariant = l.irBuilder.CreateBitOrPointerCast(addrAsStorage, typVariantRaw->getPointerTo());

	l.irBuilder.CreateStore(variantRaw, addrAsVariant);
	llvm::Value* storageRaw = l.irBuilder.CreateLoad(typStorageRaw, addrAsStorage);
	resultRaw = l.irBuilder.CreateInsertValue(resultRaw, storageRaw, llvm::ArrayRef<unsigned>({1}));

	return resultRaw;
	}

	case Operator::SWITCH_VARIANT:
	{
	return controlIR.compileSwitchVariant(expr, hintAlias);
	}

	case Operator::SWITCH_LATE:
	{
	assert(false && "Instruction's compilation should've been redirected to interpretation");
	return nullptr;
	}

	case Operator::SEQUENCE:
	{
	return controlIR.compileSequence(expr);
	}

	case Operator::UNDEF:
	{
	llvm::Type* typExprUndef = l.toLLVMType(pass->man->root->getType(expr, expectedT));
	return llvm::UndefValue::get(typExprUndef);
	}

	case Operator::UPDATE:
	{
	TypesHelper helper(pass->man->llvm);
	containers::RecordIR irRecords(ctx);

	const Expression& aggrE = expr.operands.at(0);
	const Expression& updE = expr.operands.at(1);
	const ExpandedType& aggrT = pass->man->root->getType(aggrE);
	llvm::Value* aggrRaw = process(aggrE);

	if (helper.isRecordT(aggrT)){
	return irRecords.update(aggrRaw, aggrT, updE);
	}

	if (helper.isArrayT(aggrT)){
	if (updE.op == Operator::LIST_INDEX){

	std::unique_ptr<containers::IContainersIR> containersIR(
	containers::IContainersIR::create(aggrE, TypeAnnotation(), ctx
	));

	return containersIR->update(aggrRaw, updE, hintAlias);
	}
	}

	assert(false);
	return nullptr;
	}

	case Operator::INVALID:
	assert(expr.__state != Expression::COMPOUND);

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

	case Expression::NUMBER:
	{
	llvm::Type* typConst = l.toLLVMType(pass->man->root->getType(expr, expectedT));
	int literal = expr.getValueDouble();

	if (typConst->isFloatingPointTy()) return llvm::ConstantFP::get(typConst, literal);
	if (typConst->isIntegerTy()) return llvm::ConstantInt::get(typConst, literal);

	assert(false && "Can't compile literal");
	}

	case Expression::STRING:
	{
	return controlIR.compileConstantStringAsPChar(expr.getValueString(), hintAlias);
	};

	default:
	{
	break;
	}
	};

	break;

	default: break;

	}

	assert(false && "Can't compile expression");
	return 0;
	}

	llvm::Value*
	BasicBruteScope::compile(const std::string& hintBlockDecl) {
	LLVMLayer* llvm = pass->man->llvm;

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

	lastBlockRaw = pass->man->llvm->irBuilder.GetInsertBlock();
	Symbol symbScope = Symbol{ScopedSymbol::RetSymbol, scope};

	//set hint for an entry scope
	string retAlias = (scope->__parent)? "" : function->prepareName();
	return processSymbol(symbScope, retAlias);
	}

	IBruteScope::~IBruteScope() { }

	IBruteFunction::~IBruteFunction() { }

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

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

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

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

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

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

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

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

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

	IBruteScope*
	IBruteFunction::getBruteScope(const CodeScope * const scope) {
	if (__scopes.count(scope)) {
	auto result = __scopes.at(scope).lock();

	if (result) {
	return result.get();
	}
	}

	std::shared_ptr<IBruteScope> unit(pass->buildCodeScopeUnit(scope, this));

	if (scope->__parent != nullptr) {
	auto parentUnit = Decorators<CachedScopeDecoratorTag>::getInterface(getBruteScope(scope->__parent));
	parentUnit->registerChildScope(unit);

	} else {
	__orphanedScopes.push_back(unit);
	}

	if (!__scopes.emplace(scope, unit).second) {
	__scopes[scope] = unit;
	}

	return unit.get();
	}

	IBruteScope*
	IBruteFunction::getScopeUnit(ManagedScpPtr scope) {
	return getBruteScope(&*scope);
	}

	IBruteScope*
	IBruteFunction::getEntry() {
	return getBruteScope(__entry);
	}

	std::vector<llvm::Type*>
	IBruteFunction::getScopeSignature(CodeScope* scope){
	LLVMLayer* llvm = IBruteFunction::pass->man->llvm;
	AST* ast = IBruteFunction::pass->man->root;
	std::vector<llvm::Type*> result;

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

	ScopedSymbol argS{scope->__identifiers.at(argAlias), versions::VERSION_NONE};
	const Expression& argE = scope->__declarations.at(argS);
	const ExpandedType& argT = ast->expandType(argE.type);

	return llvm->toLLVMType(argT, argE);
	});

	if(scope->trackExternalSymbs){
	std::transform(scope->boundExternalSymbs.begin(), scope->boundExternalSymbs.end(), std::inserter(result, result.end()),
	[llvm, ast](const Symbol& argS){
	const Expression& argE = CodeScope::getDefinition(argS);
	const ExpandedType& argT = ast->expandType(argE.type);

	return llvm->toLLVMType(argT, argE);
	});
	}

	return result;
	}

	template<>
	compilation::IBruteFunction*
	CompilePassCustomDecorators<void, void>
	::buildFunctionUnit(const ManagedFnPtr& function) {
	return new BruteFunctionDefault(function, this);

	}

	template<>
	compilation::IBruteScope*
	CompilePassCustomDecorators<void, void>
	::buildCodeScopeUnit(const CodeScope * const scope, IBruteFunction* function) {
	return new DefaultCodeScopeUnit(scope, function, this);
	}

	std::string
	BasicBruteScope::getIndexStr(const Expression& index){
	switch(index.__state){

	//named struct field
	case Expression::STRING:
	return index.getValueString();
	break;

	//anonymous struct field
	case Expression::NUMBER:
	return to_string((int) index.getValueDouble());
	break;

	default:
	assert(false && "Wrong index for a struct");
	}
	return "";
	}

	} // end of compilation

	compilation::IBruteFunction*
	CompilePass::getBruteFn(const ManagedFnPtr& function) {
	unsigned int id = function.id();

	if (!functions.count(id)) {
	compilation::IBruteFunction* unit = buildFunctionUnit(function);
	functions.emplace(id, unit);
	return unit;
	}

	return functions.at(id);
	}

	void
	CompilePass::prepare(){
	//Initialization:
	#ifndef XREATE_CONFIG_MIN
	#endif
	managerTransformations = new xreate::compilation::TransformationsManager();
	targetInterpretation = new interpretation::TargetInterpretation(man, this);
	}

	void
	CompilePass::run() {
	prepare();

	//Determine entry function:
	StaticModel modelEntry = man->transcend->query(analysis::FN_ENTRY_PREDICATE);

	if (man->options.requireEntryFn){
	assert(modelEntry.size() && "Error: No entry function found");
	assert(modelEntry.size() == 1 && "Error: Ambiguous entry function");
	}

	if(modelEntry.size()){
	string fnEntryName = std::get<0>(TranscendLayer::parse<std::string>(modelEntry.begin()->second));
	compilation::IBruteFunction* fnEntry = getBruteFn(man->root->findFunction(fnEntryName));
	__fnEntryRaw = fnEntry->compile();
	}

	//Compile exterior functions:
	StaticModel modelExterior = man->transcend->query(analysis::FN_EXTERIOR_PREDICATE);
	for(const auto entry: modelExterior){
	const string& fnName = std::get<0>(TranscendLayer::parse<std::string>(entry.second));
	getBruteFn(man->root->findFunction(fnName))->compile();
	}
	}

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

	void
	CompilePass::prepareQueries(TranscendLayer* transcend) {
	#ifndef XREATE_CONFIG_MIN
	transcend->registerQuery(new latex::LatexQuery(), QueryId::LatexQuery);
	#endif

	transcend->registerQuery(new containers::Query(), QueryId::ContainersQuery);
	transcend->registerQuery(new demand::DemandQuery(), QueryId::DemandQuery);
	transcend->registerQuery(new polymorph::PolymorphQuery(), QueryId::PolymorphQuery);
	}

	} //end of namespace xreate

	/**
	* \class xreate::CompilePass
	* \brief The owner of the compilation process. Performs fundamental compilation activities along with the xreate::compilation's routines
	*
	* xreate::CompilePass traverses over xreate::AST tree and produces executable code.
	* The pass performs compilation using the following data sources:
	* - %Attachments: the data gathered by the previous passes. See \ref xreate::Attachments.
	* - Transcend solutions accessible via queries. See \ref xreate::IQuery, \ref xreate::TranscendLayer.
	*
	* The pass generates a bytecode by employing \ref xreate::LLVMLayer(wrapper over LLVM toolchain).
	* Many compilation activities are delegated to more specific routines. Most notable delegated compilation aspects are:
	* - Containers support. See \ref xreate::containers.
	* - Latex compilation. See \ref xreate::latex.
	* - Interpretation support. See \ref xreate::interpretation.
	* - Loop saturation support. See \ref xreate::compilation::TransformationsScopeDecorator.
	* - External code interaction support. See \ref xreate::ExternLayer (wrapper over Clang library).
	*
	* \section adaptability_sect Adaptability
	* xreate::CompilePass's behaviour can be adapted in several ways:
	* - %Function Decorators to alter function-level compilation. See \ref xreate::compilation::IBruteFunction
	* - Code Block Decorators to alter code block level compilation. See \ref xreate::compilation::ICodeScopeUnit.
	* Default functionality defined by \ref xreate::compilation::DefaultCodeScopeUnit
	* - Targets to allow more versitile extensions.
	* Currently only xreate::interpretation::TargetInterpretation use Targets infrastructure. See \ref xreate::compilation::Target.
	* - Altering %function invocation. See \ref xreate::compilation::IFnInvocation.
	*
	* Clients are free to construct a compiler instantiation with the desired decorators by using \ref xreate::compilation::CompilePassCustomDecorators.
	* As a handy alias, `CompilePassCustomDecorators<void, void>` constructs the default compiler.
	*
	*/

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