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ast.cpp
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ast.cpp
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#include "ast.h"
#include "CodeGenerator.h"
using namespace std;
void LOG_I(const string & msg)
{
//cout << "[INFO]" << msg << endl;
}
void printType(llvm::Value* v)
{
if (v->getType()->isIntegerTy())
{
cout << "int " << v->getType()->getIntegerBitWidth() << endl;
}
else if (v->getType()->isFloatTy())
{
cout << "float" << endl;
}
else if (v->getType()->isDoubleTy())
{
cout << "double" << endl;
}
else
{
cout << "unknown" << endl;
}
}
template <typename T>
void printT(T* vt)
{
string str;
llvm::raw_string_ostream stream(str);
vt->print(stream);
cout << str << endl;
}
llvm::AllocaInst *CreateEntryBlockAlloca(llvm::Function *TheFunction, llvm::StringRef VarName, llvm::Type* type)
{
llvm::IRBuilder<> TmpB(&TheFunction->getEntryBlock(), TheFunction->getEntryBlock().begin());
return TmpB.CreateAlloca(type, nullptr, VarName);
}
llvm::Type* toLLVMPtrType(const BuildInType & type)
{
switch (type)
{
case SPL_INTEGER: return llvm::Type::getInt32PtrTy(TheContext);
case SPL_REAL: return llvm::Type::getDoublePtrTy(TheContext);
case SPL_CHAR: return llvm::Type::getInt8PtrTy(TheContext);
case SPL_BOOLEAN: return llvm::Type::getInt1PtrTy(TheContext);
default: throw logic_error("Not supported pointer type.");
}
}
llvm::Type* AstType::toLLVMType()
{
switch (this->type)
{
case SPL_ARRAY:
if (this->arrayType->range->type == SPL_CONST_RANGE)
{
return llvm::ArrayType::get(this->arrayType->type->toLLVMType(), this->arrayType->range->constRangeType->size());
}
else
{
return llvm::ArrayType::get(this->arrayType->type->toLLVMType(), this->arrayType->range->enumRangeType->size());
}
case SPL_CONST_RANGE: return TheBuilder.getInt32Ty();
case SPL_ENUM_RANGE: return TheBuilder.getInt32Ty();
case SPL_BUILD_IN:
switch (buildInType)
{
case SPL_INTEGER: return TheBuilder.getInt32Ty();
case SPL_REAL: return TheBuilder.getDoubleTy();
case SPL_CHAR: return TheBuilder.getInt8Ty();
case SPL_BOOLEAN: return TheBuilder.getInt1Ty();
}
break;
case SPL_ENUM:
case SPL_RECORD:
case SPL_USER_DEFINE:
case SPL_VOID: return TheBuilder.getVoidTy();
}
}
llvm::Constant* AstType::initValue(ConstValue *v)
{
vector<llvm::Constant*> element;
llvm::ArrayType* arrayType;;
size_t size = 0;
if (v != nullptr)
{
switch (this->type)
{
case SPL_ARRAY:
if (this->arrayType->range->type == SPL_CONST_RANGE)
{
size = this->arrayType->range->constRangeType->size();
}
else
{
size = this->arrayType->range->enumRangeType->size();
}
for (int i = 0; i < size; i++)
{
element.push_back(this->arrayType->type->initValue(v));
}
arrayType = (llvm::ArrayType*)this->toLLVMType();
return llvm::ConstantArray::get(arrayType, element);
case SPL_CONST_RANGE:
case SPL_ENUM_RANGE: return TheBuilder.getInt32(v->getValue().i);
case SPL_BUILD_IN:
switch (buildInType)
{
case SPL_INTEGER: return TheBuilder.getInt32(v->getValue().i);
case SPL_REAL: return llvm::ConstantFP::get(TheBuilder.getDoubleTy(), v->getValue().r);
case SPL_CHAR: return TheBuilder.getInt8(v->getValue().c);
case SPL_BOOLEAN: return TheBuilder.getInt1(v->getValue().b);
}
break;
case SPL_ENUM:
case SPL_RECORD:
case SPL_USER_DEFINE:
case SPL_VOID: return nullptr;
}
}
else
{
switch (this->type)
{
case SPL_ARRAY:
if (this->arrayType->range->type == SPL_CONST_RANGE)
{
size = this->arrayType->range->constRangeType->size();
}
else
{
size = this->arrayType->range->enumRangeType->size();
}
for (int i = 0; i < size; i++)
{
element.push_back(this->arrayType->type->initValue());
}
arrayType = (llvm::ArrayType*)this->toLLVMType();
return llvm::ConstantArray::get(arrayType, element);
case SPL_CONST_RANGE:
case SPL_ENUM_RANGE: return TheBuilder.getInt32(0);
case SPL_BUILD_IN:
switch (buildInType)
{
case SPL_INTEGER: return TheBuilder.getInt32(0);
case SPL_REAL: return llvm::ConstantFP::get(TheBuilder.getDoubleTy(), 0.0);
case SPL_CHAR: return TheBuilder.getInt8(0);
case SPL_BOOLEAN: return TheBuilder.getInt1(0);
}
break;
case SPL_ENUM:
case SPL_RECORD:
case SPL_USER_DEFINE:
case SPL_VOID: return nullptr;
}
}
}
llvm::Value *BinaryOp(llvm::Value *lValue, BinaryExpression::BinaryOperator op, llvm::Value *rValue)
{
// printType(lValue);
// printType(rValue);
bool flag = lValue->getType()->isDoubleTy() || rValue->getType()->isDoubleTy();
switch (op)
{
case BinaryExpression::SPL_PLUS: return flag ? TheBuilder.CreateFAdd(lValue, rValue, "addtmpf") : TheBuilder.CreateAdd(lValue, rValue, "addtmpi");
case BinaryExpression::SPL_MINUS: return flag ? TheBuilder.CreateFSub(lValue, rValue, "subtmpf") : TheBuilder.CreateSub(lValue, rValue, "subtmpi");
case BinaryExpression::SPL_MUL: return flag ? TheBuilder.CreateFMul(lValue, rValue, "multmpf") : TheBuilder.CreateMul(lValue, rValue, "multmpi");
case BinaryExpression::SPL_DIV: return TheBuilder.CreateSDiv(lValue, rValue, "tmpDiv");
case BinaryExpression::SPL_GE: return TheBuilder.CreateICmpSGE(lValue, rValue, "tmpSGE");
case BinaryExpression::SPL_GT: return TheBuilder.CreateICmpSGT(lValue, rValue, "tmpSGT");
case BinaryExpression::SPL_LT: return TheBuilder.CreateICmpSLT(lValue, rValue, "tmpSLT");
case BinaryExpression::SPL_LE: return TheBuilder.CreateICmpSLE(lValue, rValue, "tmpSLE");
case BinaryExpression::SPL_EQUAL: return TheBuilder.CreateICmpEQ(lValue, rValue, "tmpEQ");
case BinaryExpression::SPL_UNEQUAL: return TheBuilder.CreateICmpNE(lValue, rValue, "tmpNE");
case BinaryExpression::SPL_OR: return TheBuilder.CreateOr(lValue, rValue, "tmpOR");
case BinaryExpression::SPL_MOD: return TheBuilder.CreateSRem(lValue, rValue, "tmpSREM");
case BinaryExpression::SPL_AND: return TheBuilder.CreateAnd(lValue, rValue, "tmpAND");
case BinaryExpression::SPL_XOR: return TheBuilder.CreateXor(lValue, rValue, "tmpXOR");
}
}
llvm::Value *Identifier::codeGen(CodeGenerator & generator) {
LOG_I("Idnetifier");
// return TheBuilder.CreateLoad(generator.findValue(*(this->name)), *(this->name));
return new llvm::LoadInst(generator.findValue(*(this->name)), "tmp", false, TheBuilder.GetInsertBlock());
}
llvm::Value *Integer::codeGen(CodeGenerator & generator) {
LOG_I("Integer");
return TheBuilder.getInt32(this->value);
}
llvm::Value *Char::codeGen(CodeGenerator & generator) {
LOG_I("Char");
return TheBuilder.getInt8(this->value);
}
llvm::Value *Real::codeGen(CodeGenerator & generator) {
LOG_I("Real");
// return llvm::ConstantFP::get(TheContext, llvm::APFloat(this->value));
return llvm::ConstantFP::get(TheBuilder.getDoubleTy(), this->value);
}
llvm::Value *Boolean::codeGen(CodeGenerator & generator) {
LOG_I("Boolean");
return TheBuilder.getInt1(this->value);
}
llvm::Value *ConstDeclaration::codeGen(CodeGenerator & generator) {
LOG_I("Const Declaration");
string name = this->name->getName();
this->type = new AstType(this->value->getType());
if (this->isGlobal())
{
return new llvm::GlobalVariable(*generator.TheModule, this->type->toLLVMType(), true, llvm::GlobalValue::ExternalLinkage, this->type->initValue(this->value), name);
}
else
{
auto alloc = CreateEntryBlockAlloca(generator.getCurFunction(), name, this->type->toLLVMType());
return TheBuilder.CreateStore(this->value->codeGen(generator), alloc);
}
}
llvm::Value *TypeDeclaration::codeGen(CodeGenerator & generator) {
LOG_I("Type Declaration");
return nullptr;
}
llvm::Value *AstType::codeGen(CodeGenerator & generator) {
LOG_I("Type");
switch (this->type)
{
case SPL_ARRAY: this->arrayType->codeGen(generator); break;
case SPL_CONST_RANGE: this->constRangeType->codeGen(generator); break;
case SPL_ENUM_RANGE: this->enumRangeType->codeGen(generator); break;
case SPL_RECORD: this->recordType->codeGen(generator); break;
case SPL_ENUM: this->enumType->codeGen(generator); break;
case SPL_USER_DEFINE: this->userDefineType->codeGen(generator); break;
case SPL_BUILD_IN: break;
case SPL_VOID: break;
}
return (llvm::Value*)this->toLLVMType();
}
llvm::Value *EnumType::codeGen(CodeGenerator & generator) {
LOG_I("Enum Type");
//TODO
return nullptr;
}
llvm::Value *AstArrayType::codeGen(CodeGenerator & generator) {
LOG_I("Array Type");
return this->range->codeGen(generator);
}
llvm::Value *RecordType::codeGen(CodeGenerator & generator) {
LOG_I("Record Type");
return nullptr;
}
llvm::Value *ConstRangeType::mapIndex(llvm::Value *indexValue, CodeGenerator & generator)
{
return BinaryOp(indexValue, BinaryExpression::SPL_MINUS, this->lowBound->codeGen(generator));
}
llvm::Value *ConstRangeType::codeGen(CodeGenerator & generator) {
LOG_I("Const Range Type");
this->size();
return nullptr;
}
llvm::Value *EnumRangeType::mapIndex(llvm::Value *indexValue, CodeGenerator & generator)
{
return BinaryOp(indexValue, BinaryExpression::SPL_MINUS, this->lowValue);
}
int64_t getActualValue(llvm::Value *v)
{
llvm::Constant *constValue = llvm::cast<llvm::GlobalVariable>(v)->getInitializer();
llvm::ConstantInt *constInt = llvm::cast<llvm::ConstantInt>(constValue);
return constInt->getSExtValue();
}
size_t EnumRangeType::size()
{
int64_t low = 1, up = 0;
if (this->lowValue->getType() == this->upValue->getType())
{
low = getActualValue(this->lowValueAddr);
up = getActualValue(this->upValueAddr);
// cout << "low: " << low << " up: " << up << endl;
if (low > up)
{
throw std::range_error("[ERROR]low > up.");
}
}
else
{
throw std::domain_error("[ERROR]Invalid range type.");
}
return up - low + 1;
}
llvm::Value *EnumRangeType::codeGen(CodeGenerator & generator) {
LOG_I("Enum Range Type");
this->upValue = this->upBound->codeGen(generator);
this->lowValue = this->lowBound->codeGen(generator);
this->upValueAddr = generator.findValue(this->upBound->getName());
this->lowValueAddr = generator.findValue(this->lowBound->getName());
this->size();
return nullptr;
}
llvm::Value *FieldDeclaration::codeGen(CodeGenerator & generator) {
LOG_I("Field Declaration");
return nullptr;
}
llvm::Value *VarDeclaration::codeGen(CodeGenerator & generator) {
LOG_I("Var Declaration");
llvm::Value* alloc = nullptr;
llvm::Type* varType;
for (auto & id : *(this->nameList))
{
if (this->type->type == AstType::SPL_ARRAY)
{
generator.arrayMap[id->getName()] = this->type->arrayType;
}
varType = (llvm::Type*)(this->type->codeGen(generator));
if (this->isGlobal())
{
alloc = new llvm::GlobalVariable(*generator.TheModule, varType, false, llvm::GlobalValue::ExternalLinkage, this->type->initValue(), id->getName());
}
else
{
alloc = CreateEntryBlockAlloca(generator.getCurFunction(), id->getName(), varType);
}
}
return alloc;
}
llvm::Value *FuncDeclaration::codeGen(CodeGenerator & generator) {
LOG_I("Function Declaration");
//Prototype
vector<llvm::Type*> argTypes;
for (auto & argType : *(this->paraList))
{
if (argType->isVar)
{
argTypes.insert(argTypes.end(), argType->nameList->size(), toLLVMPtrType(argType->getType()->buildInType));
}
else
{
argTypes.insert(argTypes.end(), argType->nameList->size(), argType->getType()->toLLVMType());
}
}
llvm::FunctionType *funcType = llvm::FunctionType::get(this->returnType->toLLVMType(), argTypes, false);
llvm::Function *function = llvm::Function::Create(funcType, llvm::GlobalValue::InternalLinkage, this->name->getName(), generator.TheModule.get());
generator.pushFunction(function);
//Block
llvm::BasicBlock *newBlock = llvm::BasicBlock::Create(TheContext, "entrypoint", function, nullptr);
TheBuilder.SetInsertPoint(newBlock);
//Parameters
llvm::Function::arg_iterator argIt = function->arg_begin();
int index = 1;
for (auto & args : *(this->paraList))
{
for (auto & arg : *(args->nameList))
{
llvm::Value *alloc = nullptr;
if (args->isVar)
{
//Check value
// alloc = generator.findValue(arg->getName());
function->addAttribute(index, llvm::Attribute::NonNull);
alloc = TheBuilder.CreateGEP(argIt++, TheBuilder.getInt32(0), arg->getName());
}
else
{
alloc = CreateEntryBlockAlloca(function, arg->getName(), args->type->toLLVMType());
TheBuilder.CreateStore(argIt++, alloc);
}
index++;
}
}
//Return
llvm::Value *res = nullptr;
if (this->returnType->type != AstType::SPL_VOID)
{
res = CreateEntryBlockAlloca(function, this->name->getName(), this->returnType->toLLVMType());
}
//Sub routine
this->subRoutine->codeGen(generator);
//Return value
if (this->returnType->type != AstType::SPL_VOID)
{
auto returnInst = this->name->codeGen(generator);
TheBuilder.CreateRet(returnInst);
}
else
{
TheBuilder.CreateRetVoid();
}
//Pop back
generator.popFunction();
TheBuilder.SetInsertPoint(&(generator.getCurFunction())->getBasicBlockList().back());
return function;
}
llvm::Value *Parameter::codeGen(CodeGenerator & generator) {
LOG_I("Parameter");
//Not need
return nullptr;
}
llvm::Value *Routine::codeGen(CodeGenerator & generator) {
LOG_I("Routine");
llvm::Value* res = nullptr;
//Const declareation part
for (auto & constDecl : *(this->constDeclList))
{
res = constDecl->codeGen(generator);
}
//Variable declareation part
for (auto & varDecl : *(this->varDeclList))
{
res = varDecl->codeGen(generator);
}
//Type declareation part
for (auto & typeDecl : *(this->typeDeclList))
{
res = typeDecl->codeGen(generator);
}
//Routine declareation part
for (auto & routineDecl : *(this->routineList))
{
res = routineDecl->codeGen(generator);
}
//Routine body
res = routineBody->codeGen(generator);
return res;
}
llvm::Value *Program::codeGen(CodeGenerator & generator) {
LOG_I("Program");
//Main function prototype
vector<llvm::Type*> argTypes;
llvm::FunctionType * funcType = llvm::FunctionType::get(TheBuilder.getVoidTy(), makeArrayRef(argTypes), false);
generator.mainFunction = llvm::Function::Create(funcType, llvm::GlobalValue::InternalLinkage, "main", generator.TheModule.get());
llvm::BasicBlock * basicBlock = llvm::BasicBlock::Create(TheContext, "entrypoint", generator.mainFunction, 0);
generator.pushFunction(generator.mainFunction);
TheBuilder.SetInsertPoint(basicBlock);
//Create System functions
generator.printf = generator.createPrintf();
generator.scanf = generator.createScanf();
//Code generate
this->routine->setGlobal();
this->routine->codeGen(generator);
TheBuilder.CreateRetVoid();
generator.popFunction();
return nullptr;
}
llvm::Value *AssignStatement::codeGen(CodeGenerator & generator) {
LOG_I("Assign Statement");
llvm::Value *res = nullptr;
this->forward(generator);
switch (this->type)
{
case ID_ASSIGN: res = TheBuilder.CreateStore(this->rhs->codeGen(generator), generator.findValue(this->lhs->getName())); break;
case ARRAY_ASSIGN: res = TheBuilder.CreateStore(this->rhs->codeGen(generator), (new ArrayReference(this->lhs, this->sub))->getReference(generator)); break;
case RECORD_ASSIGN: res = nullptr; break;
}
this->backward(generator);
return res;
}
llvm::Value *BinaryExpression::codeGen(CodeGenerator & generator) {
LOG_I("Binary Expression");
llvm::Value* lValue = this->lhs->codeGen(generator);
llvm::Value* rValue = this->rhs->codeGen(generator);
return BinaryOp(lValue, this->op, rValue);
}
llvm::Value *ArrayReference::codeGen(CodeGenerator & generator) {
LOG_I("Array Reference");
return TheBuilder.CreateLoad(this->getReference(generator), "arrRef");
}
llvm::Value *ArrayReference::getReference(CodeGenerator & generator)
{
string name = this->array->getName();
llvm::Value* arrayValue = generator.findValue(name), *indexValue;
if (generator.arrayMap[name]->range->type == AstType::SPL_CONST_RANGE)
{
indexValue = generator.arrayMap[name]->range->constRangeType->mapIndex(this->index->codeGen(generator), generator);
}
else
{
indexValue = generator.arrayMap[name]->range->enumRangeType->mapIndex(this->index->codeGen(generator), generator);
}
vector<llvm::Value*> indexList;
indexList.push_back(TheBuilder.getInt32(0));
indexList.push_back(indexValue);
return TheBuilder.CreateInBoundsGEP(arrayValue, llvm::ArrayRef<llvm::Value*>(indexList));
}
llvm::Value *RecordReference::codeGen(CodeGenerator & generator) {
LOG_I("Record Reference");
return nullptr;
}
llvm::Value *FunctionCall::codeGen(CodeGenerator & generator) {
LOG_I("Function Call");
this->forward(generator);
llvm::Function *function = generator.TheModule->getFunction(this->function->getName());
if (function == nullptr)
{
throw domain_error("[ERROR] Function not defined: " + this->function->getName());
}
vector<llvm::Value*> args;
llvm::Function::arg_iterator argIt = function->arg_begin();
for (auto & arg : *(this->args))
{
if (argIt->hasNonNullAttr())
{
// cout << "Pass a pointer" << endl;
llvm::Value * addr = generator.findValue(dynamic_cast<Identifier*>(arg)->getName());
args.push_back(addr);
}
else
{
// cout << "Pass a value" << endl;
args.push_back(arg->codeGen(generator));
}
argIt++;
}
llvm::Value *res = TheBuilder.CreateCall(function, args, "calltmp");
this->backward(generator);
return res;
}
llvm::Value *ProcedureCall::codeGen(CodeGenerator & generator) {
LOG_I("Procedure Call");
this->forward(generator);
llvm::Function *function = generator.TheModule->getFunction(this->function->getName());
if (function == nullptr)
{
throw domain_error("[ERROR] Function not defined: " + this->function->getName());
}
vector<llvm::Value*> args;
llvm::Function::arg_iterator argIt = function->arg_begin();
for (auto & arg : *(this->args))
{
if (argIt->hasNonNullAttr())
{
// cout << "Pass a pointer" << endl;
llvm::Value * addr = generator.findValue(dynamic_cast<Identifier*>(arg)->getName());
args.push_back(addr);
}
else
{
// cout << "Pass a value" << endl;
args.push_back(arg->codeGen(generator));
}
argIt++;
}
llvm::Value* res = TheBuilder.CreateCall(function, args, "calltmp");
this->backward(generator);
return res;
}
llvm::Value *SysFunctionCall::codeGen(CodeGenerator & generator) {
LOG_I("System Function Call");
this->forward(generator);
//TODO::Code gen
this->backward(generator);
return nullptr;
}
llvm::Value *SysProcedureCall::SysProcWrite(CodeGenerator & generator, bool isLineBreak)
{
string formatStr = "";
vector<llvm::Value*> params;
for (auto & arg : *(this->args))
{
llvm::Value* argValue = arg->codeGen(generator);
if (argValue->getType() == TheBuilder.getInt32Ty())
{
formatStr += "%d";
}
else if (argValue->getType() == TheBuilder.getInt8Ty())
{
formatStr += "%c";
}
else if (argValue->getType() == TheBuilder.getInt1Ty())
{
formatStr += "%d";
}
else if (argValue->getType()->isDoubleTy())
{
formatStr += "%lf";
}
else
{
throw logic_error("[ERROR]Invalid type to write.");
}
params.push_back(argValue);
}
if (isLineBreak)
{
formatStr += "\n";
}
auto formatConst = llvm::ConstantDataArray::getString(TheContext, formatStr.c_str());
auto formatStrVar = new llvm::GlobalVariable(*(generator.TheModule), llvm::ArrayType::get(TheBuilder.getInt8Ty(), formatStr.size() + 1), true, llvm::GlobalValue::ExternalLinkage, formatConst, ".str");
auto zero = llvm::Constant::getNullValue(TheBuilder.getInt32Ty());
llvm::Constant* indices[] = {zero, zero};
auto varRef = llvm::ConstantExpr::getGetElementPtr(formatStrVar->getType()->getElementType(), formatStrVar, indices);
// auto varRef
params.insert(params.begin(), varRef);
return TheBuilder.CreateCall(generator.printf, llvm::makeArrayRef(params), "printf");
}
llvm::Value *SysProcedureCall::SysProcRead(CodeGenerator & generator)
{
string formatStr = "";
vector<llvm::Value*> params;
auto arg = this->args->front();
llvm::Value *argAddr, *argValue;
//Just common variable
argAddr = generator.findValue(dynamic_cast<Identifier*>(arg)->getName());
argValue = arg->codeGen(generator);
if (argValue->getType() == TheBuilder.getInt32Ty())
{
formatStr += "%d";
}
else if (argValue->getType() == TheBuilder.getInt8Ty())
{
formatStr += "%c";
}
else if (argValue->getType() == TheBuilder.getInt1Ty())
{
formatStr += "%d";
}
else if (argValue->getType()->isDoubleTy())
{
formatStr += "%lf";
}
else
{
throw logic_error("[ERROR]Invalid type to read.");
}
params.push_back(argAddr);
params.insert(params.begin(), TheBuilder.CreateGlobalStringPtr(formatStr));
return TheBuilder.CreateCall(generator.scanf, params, "scanf");
}
llvm::Value *SysProcedureCall::codeGen(CodeGenerator & generator) {
LOG_I("System Procedure Call");
llvm::Value *res = nullptr;
this->forward(generator);
switch (this->procedure) {
case SPL_READ: res = this->SysProcRead(generator); break;
case SPL_WRITE: res = this->SysProcWrite(generator, false); break;
case SPL_WRITELN: res = this->SysProcWrite(generator, true); break;
case SPL_ERROR_PROCEDURE: throw domain_error("[ERROR]Unknown System Procedure");
}
this->backward(generator);
return res;
}
llvm::Value *IfStatement::codeGen(CodeGenerator & generator) {
LOG_I("If Statement");
this->forward(generator);
llvm::Value *condValue = this->condition->codeGen(generator), *thenValue = nullptr, *elseValue = nullptr;
condValue = TheBuilder.CreateICmpNE(condValue, llvm::ConstantInt::get(llvm::Type::getInt1Ty(TheContext), 0, true), "ifCond");
llvm::Function *TheFunction = generator.getCurFunction();
llvm::BasicBlock *thenBB = llvm::BasicBlock::Create(TheContext, "then", TheFunction);
llvm::BasicBlock *elseBB = llvm::BasicBlock::Create(TheContext, "else", TheFunction);
llvm::BasicBlock *mergeBB = llvm::BasicBlock::Create(TheContext, "merge", TheFunction);
//Then
auto branch = TheBuilder.CreateCondBr(condValue, thenBB, elseBB);
TheBuilder.SetInsertPoint(thenBB);
thenValue = this->thenStatement->codeGen(generator);
TheBuilder.CreateBr(mergeBB);
thenBB = TheBuilder.GetInsertBlock();
//Else
// if (TheFunction != generator.mainFunction)
// {
// TheFunction->getBasicBlockList().push_back(elseBB);
// }
TheBuilder.SetInsertPoint(elseBB);
if (this->elseStatement != nullptr)
{
elseValue = this->elseStatement->codeGen(generator);
}
TheBuilder.CreateBr(mergeBB);
elseBB = TheBuilder.GetInsertBlock();
//Merge
// if (TheFunction != generator.mainFunction)
// {
// TheFunction->getBasicBlockList().push_back(mergeBB);
// }
TheBuilder.SetInsertPoint(mergeBB);
this->backward(generator);
return branch;
}
llvm::Value *RepeatStatement::codeGen(CodeGenerator & generator) {
LOG_I("Repeate Statement");
this->forward(generator);
llvm::Function *TheFunction = generator.getCurFunction();
llvm::BasicBlock *condBB = llvm::BasicBlock::Create(TheContext, "cond", TheFunction);
llvm::BasicBlock *loopBB = llvm::BasicBlock::Create(TheContext, "loop", TheFunction);
llvm::BasicBlock *afterBB = llvm::BasicBlock::Create(TheContext, "afterLoop", TheFunction);
//Loop
TheBuilder.CreateBr(loopBB);
TheBuilder.SetInsertPoint(loopBB);
for (auto & stmt : *(this->repeatStatement))
{
stmt->codeGen(generator);
}
TheBuilder.CreateBr(condBB);
loopBB = TheBuilder.GetInsertBlock();
//Cond
TheBuilder.SetInsertPoint(condBB);
llvm::Value *condValue = this->condition->codeGen(generator);
condValue = TheBuilder.CreateICmpNE(condValue, llvm::ConstantInt::get(llvm::Type::getInt1Ty(TheContext), 0, true), "repeateCond");
auto branch = TheBuilder.CreateCondBr(condValue, loopBB, afterBB);
//After
TheBuilder.SetInsertPoint(afterBB);
this->backward(generator);
return branch;
}
llvm::Value *WhileStatement::codeGen(CodeGenerator & generator) {
LOG_I("While Statement");
this->forward(generator);
llvm::Function *TheFunction = generator.getCurFunction();
llvm::BasicBlock *condBB = llvm::BasicBlock::Create(TheContext, "cond", TheFunction);
llvm::BasicBlock *loopBB = llvm::BasicBlock::Create(TheContext, "loop", TheFunction);
llvm::BasicBlock *afterBB = llvm::BasicBlock::Create(TheContext, "afterLoop", TheFunction);
//Cond
TheBuilder.CreateBr(condBB);
TheBuilder.SetInsertPoint(condBB);
llvm::Value *condValue = this->condition->codeGen(generator);
condValue = TheBuilder.CreateICmpNE(condValue, llvm::ConstantInt::get(llvm::Type::getInt1Ty(TheContext), 0, true), "whileCond");
auto branch = TheBuilder.CreateCondBr(condValue, loopBB, afterBB);
condBB = TheBuilder.GetInsertBlock();
//Loop
TheBuilder.SetInsertPoint(loopBB);
this->stmt->codeGen(generator);
TheBuilder.CreateBr(condBB);
//After
TheBuilder.SetInsertPoint(afterBB);
this->backward(generator);
return branch;
}
llvm::Value *ForStatement::codeGen(CodeGenerator & generator) {
LOG_I("For Statement");
this->forward(generator);
//Init
llvm::Function *TheFunction = generator.getCurFunction();
llvm::Value* startValue = this->value->codeGen(generator);
llvm::Value* endValue = this->step->codeGen(generator);
llvm::Value *condValue = nullptr, *curValue = nullptr, *varValue = generator.findValue(this->var->getName());
TheBuilder.CreateStore(startValue, varValue);
llvm::BasicBlock *condBB = llvm::BasicBlock::Create(TheContext, "cond", TheFunction);
llvm::BasicBlock *loopBB = llvm::BasicBlock::Create(TheContext, "loop", TheFunction);
llvm::BasicBlock *afterBB = llvm::BasicBlock::Create(TheContext, "afterLoop", TheFunction);
//Cond
TheBuilder.CreateBr(condBB);
TheBuilder.SetInsertPoint(condBB);
// curValue = TheBuilder.CreateLoad(varValue, this->var->getName());
curValue = this->var->codeGen(generator);
if (this->isAdd)
{
condValue = TheBuilder.CreateICmpSLE(curValue, endValue);
}
else
{
condValue = TheBuilder.CreateICmpSGE(curValue, endValue);
}
condValue = TheBuilder.CreateICmpNE(condValue, llvm::ConstantInt::get(llvm::Type::getInt1Ty(TheContext), 0, true), "forCond");
auto branch = TheBuilder.CreateCondBr(condValue, loopBB, afterBB);
condBB = TheBuilder.GetInsertBlock();
//Loop
TheBuilder.SetInsertPoint(loopBB);
this->stmt->codeGen(generator);
llvm::Value *tmpValue = TheBuilder.CreateAdd(curValue, TheBuilder.getInt32(this->isAdd ? 1 : -1));
TheBuilder.CreateStore(tmpValue, varValue);
TheBuilder.CreateBr(condBB);
loopBB = TheBuilder.GetInsertBlock();
//After
TheBuilder.SetInsertPoint(afterBB);
this->backward(generator);
return branch;
}
llvm::Value *CaseStatement::codeGen(CodeGenerator & generator) {
LOG_I("Case Statement");
this->forward(generator);
llvm::Value *cmpValue = this->value->codeGen(generator), *condValue = nullptr;
llvm::Function *TheFunction = generator.getCurFunction();
llvm::BasicBlock *afterBB = llvm::BasicBlock::Create(TheContext, "afterCase", TheFunction);
vector<llvm::BasicBlock*> switchBBs, caseBBs;
for (int i = 1; i <= this->caseExprList->size(); i++)
{
switchBBs.push_back(llvm::BasicBlock::Create(TheContext, "switch", TheFunction));
caseBBs.push_back(llvm::BasicBlock::Create(TheContext, "case", TheFunction));
}
TheBuilder.CreateBr(switchBBs[0]);
for (int i = 0; i < this->caseExprList->size(); i++)
{
//Switch
TheBuilder.SetInsertPoint(switchBBs[i]);
condValue = BinaryOp(cmpValue, BinaryExpression::SPL_EQUAL, (*caseExprList)[i]->value->codeGen(generator));
if (i < this->caseExprList->size() - 1)
{
TheBuilder.CreateCondBr(condValue, caseBBs[i], switchBBs[i + 1]);
}
else
{
TheBuilder.CreateCondBr(condValue, caseBBs[i], afterBB);
}
//Case
TheBuilder.SetInsertPoint(caseBBs[i]);
(*caseExprList)[i]->codeGen(generator);
TheBuilder.CreateBr(afterBB);
}
//After
TheBuilder.SetInsertPoint(afterBB);
this->backward(generator);
return nullptr;
}
llvm::Value *CaseExpression::codeGen(CodeGenerator & generator) {
LOG_I("Case Expression");
return this->stmt->codeGen(generator);
}
void Statement::forward(CodeGenerator & generator)
{
llvm::Function *TheFunction = generator.getCurFunction();
if (this->label >= 0)
{
if (generator.labelBlock[this->label] == nullptr)
{
generator.labelBlock[this->label] = llvm::BasicBlock::Create(TheContext, "Label_" + to_string(label), TheFunction);
}
if (this->afterBB == nullptr)
{
this->afterBB = llvm::BasicBlock::Create(TheContext, "afterLabel_" + to_string(this->label), TheFunction);
}
TheBuilder.CreateBr(generator.labelBlock[this->label]);
TheBuilder.SetInsertPoint(generator.labelBlock[this->label]);
}
}
void Statement::backward(CodeGenerator & generator)
{
if (this->label >= 0 && afterBB != nullptr)
{
TheBuilder.SetInsertPoint(generator.labelBlock[this->label]);
TheBuilder.CreateBr(this->afterBB);
TheBuilder.SetInsertPoint(this->afterBB);
}
}
llvm::Value *GotoStatement::codeGen(CodeGenerator & generator) {
LOG_I("Goto Statement");
this->forward(generator);
llvm::Value *res = nullptr;
if (generator.labelBlock[this->toLabel] == nullptr)
{
generator.labelBlock[this->toLabel] = llvm::BasicBlock::Create(TheContext, "Label_" + to_string(this->toLabel), generator.getCurFunction());
}
res = TheBuilder.CreateBr(generator.labelBlock[this->toLabel]);
// if (this->afterBB == nullptr)
// {
// this->afterBB = llvm::BasicBlock::Create(TheContext, "afterLabel_" + to_string(this->toLabel), generator.getCurFunction());
// }
// TheBuilder.SetInsertPoint(this->afterBB);
this->backward(generator);
return res;
}
llvm::Value *CompoundStatement::codeGen(CodeGenerator & generator) {
LOG_I("CompoundStatement");
this->forward(generator);
llvm::Value *lastValue = nullptr;
for (auto & stmt : *(this->stmtList))
{
lastValue = stmt->codeGen(generator);
}
this->backward(generator);
return lastValue;
}
string getJsonString(string name) {
return "{ \"name\" : \"" + name + "\" }";
}
string getJsonString(string name, vector<string> children) {
string result = "{ \"name\" : \"" + name + "\", \"children\" : [ ";
int i = 0;
for(auto &child : children) {
if(i != children.size() - 1)
result += child + ", ";
else
result += child + " ";
i++;
}
return result + " ] }";
}
string getJsonString(string name, string value) {
return getJsonString(name, vector<string>{value});
}
string getJsonString(string name, string value, vector<string> children) {
string result = "{ \"name\" : \"" + name + "\", \"value\" : \"" + value + "\", \"children\" : [ ";
int i = 0;
for(auto &child : children) {
if(i != children.size() - 1)
result += child + ", ";
else
result += child + " ";
i++;
}
return result + " ] }";
}
string Program::getJson() {
return getJsonString("program", *programID, vector<string>{routine->getJson()});
}
string Identifier::getJson() {
return getJsonString("Identifier", getJsonString(*name));
}
string Integer::getJson() {
return getJsonString("Integer", getJsonString(to_string(value)));
}
string Real::getJson() {