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#include "TypeManager.hh"
#include "Context.hh"
#include "Log.hh"
namespace pcc {
TypeManager::TypeManager()
: builtins_{std::make_shared<VoidType>(), std::make_shared<BooleanType>(),
std::make_shared<CharType>(), std::make_shared<IntegerType>(),
std::make_shared<RealType>()} {
PointerDifferenceType_ = GetBuiltinType(BuiltinType::INTEGER);
PointerIndexType_ = GetBuiltinType(BuiltinType::INTEGER);
builtins_.push_back(
GetPointerType(GetBuiltinType(BuiltinType::CHAR), "string"));
// llvm doesn't have void* type, we use char* instead
PointerTypes_.emplace(
GetBuiltinType(BuiltinType::VOID),
std::make_shared<PointerType>(GetBuiltinType(BuiltinType::CHAR),
PointerDifferenceType_, PointerIndexType_,
"^void"));
}
std::shared_ptr<Type> TypeManager::GetBuiltinType(BuiltinType type) {
return builtins_[ToUnderlying(type)];
}
std::pair<std::shared_ptr<Type>, Value>
TypeManager::CreateOperation(BinaryOperator op,
std::shared_ptr<Type> LeftType,
std::shared_ptr<Type> RightType, Value left,
Value right, Context* context) {
llvm::IRBuilder<>* builder = context->GetBuilder();
std::shared_ptr<IntegerBaseType> LeftIntegerBaseType =
std::dynamic_pointer_cast<IntegerBaseType>(LeftType);
std::shared_ptr<IntegerBaseType> RightIntegerBaseType =
std::dynamic_pointer_cast<IntegerBaseType>(RightType);
std::shared_ptr<PointerType> LeftPointerType =
std::dynamic_pointer_cast<PointerType>(LeftType);
std::shared_ptr<ArrayType> LeftArrayType =
std::dynamic_pointer_cast<ArrayType>(LeftType);
// array or pointer access
if (op == BinaryOperator::ARRAY_ACCESS) {
if (LeftArrayType != nullptr) {
if (RightIntegerBaseType == nullptr) {
Log(LogLevel::PCC_ERROR,
"cannot access the array %s with a non-integer type %s",
LeftType->GetCommonName(), RightType->GetCommonName());
return {nullptr, nullptr};
}
std::shared_ptr<Type> LeftIndexType = LeftArrayType->GetIndexType();
Value CastedInedx =
builder->CreateSExtOrTrunc(right, LeftIndexType->GetLLVMType());
return {LeftArrayType->GetElementType(),
LeftType->CreateBinaryOperation(op, left, CastedInedx,
context)};
}
if (LeftPointerType != nullptr) {
if (RightIntegerBaseType == nullptr) {
Log(LogLevel::PCC_ERROR,
"cannot access the pointer %s with a non-integer type %s",
LeftType->GetCommonName(), RightType->GetCommonName());
return {nullptr, nullptr};
}
Value CastedInedx = builder->CreateSExtOrTrunc(
right, PointerIndexType_->GetLLVMType());
return {LeftPointerType->GetElementType(),
LeftType->CreateBinaryOperation(op, left, CastedInedx,
context)};
}
Log(LogLevel::PCC_ERROR,
"the left operand type %s is not array or pointer",
LeftType->GetCommonName());
return {nullptr, nullptr};
}
// add/sub a pointer with a integer
if (op == BinaryOperator::ADD || op == BinaryOperator::SUB) {
if (LeftPointerType != nullptr) {
if (RightIntegerBaseType == nullptr) {
Log(LogLevel::PCC_ERROR,
"can not add pointer with non-integer type %s");
return {nullptr, nullptr};
}
Value CastedInedx = builder->CreateSExtOrTrunc(
right, PointerIndexType_->GetLLVMType());
return {LeftType, builder->CreateInBoundsGEP(left, CastedInedx)};
}
}
// other operations will require the types of left and right are the same.
std::shared_ptr<RealType> LeftRealType =
std::dynamic_pointer_cast<RealType>(LeftType);
std::shared_ptr<RealType> RightRealType =
std::dynamic_pointer_cast<RealType>(RightType);
Value ConvertedLeft, ConvertedRight;
std::shared_ptr<Type> CommonType;
if (op == BinaryOperator::REAL_DIV) {
// we can only set the CommonType to real for REAL_DIV on builtin types,
// for other types, REAL_DIV and DIV are unavailable.
CommonType = builtins_[ToUnderlying(BuiltinType::REAL)];
op = BinaryOperator::DIV;
} else if (LeftType != RightType) {
// we can cast the boolean, char, integer and real.
if (op == BinaryOperator::REAL_DIV) {
CommonType = builtins_[ToUnderlying(BuiltinType::REAL)];
} else if (LeftRealType != nullptr && RightIntegerBaseType != nullptr) {
CommonType = LeftType;
} else if (RightRealType != nullptr && LeftIntegerBaseType != nullptr) {
CommonType = RightType;
} else if (LeftIntegerBaseType != nullptr &&
RightIntegerBaseType != nullptr) {
CommonType = (LeftIntegerBaseType->GetWidth() >
RightIntegerBaseType->GetWidth()
? LeftType
: RightType);
} else {
Log(LogLevel::PCC_ERROR,
"can not apply binary operator on two different type %s and %s",
LeftType->GetCommonName(), RightType->GetCommonName());
return {nullptr, nullptr};
}
} else {
CommonType = LeftType;
}
ConvertedLeft = CreateCast(CommonType, LeftType, left, context);
ConvertedRight = CreateCast(CommonType, RightType, right, context);
Value result = CommonType->CreateBinaryOperation(op, ConvertedLeft,
ConvertedRight, context);
if (result == nullptr) {
Log(LogLevel::PCC_ERROR,
"binary operator %s is not supported on type %s",
GetOperatorName(op), CommonType->GetCommonName());
}
// logical operators return boolean type
if (ToUnderlying(op) >= ToUnderlying(BinaryOperator::LT) &&
ToUnderlying(op) <= ToUnderlying(BinaryOperator::NE)) {
CommonType = builtins_[ToUnderlying(BuiltinType::BOOLEAN)];
}
return {CommonType, result};
}
Value TypeManager::CreateOperation(UnaryOperator op, std::shared_ptr<Type> type,
Value v, Context* context) {
Value result = type->CreateUnaryOperation(op, v, context);
if (result == nullptr) {
Log(LogLevel::PCC_ERROR,
"unary operator %s is not supported on type %s",
GetOperatorName(op), type->GetCommonName());
}
return result;
}
Value TypeManager::CreateCast(std::shared_ptr<Type> DstType,
std::shared_ptr<Type> SrcType, Value v,
Context* context) {
if (DstType == SrcType) {
return v;
}
llvm::IRBuilder<>* builder = context->GetBuilder();
// we can only cast between integer and real
std::shared_ptr<IntegerBaseType> DstIntegerBaseType =
std::dynamic_pointer_cast<IntegerBaseType>(DstType);
std::shared_ptr<IntegerBaseType> SrcIntegerBaseType =
std::dynamic_pointer_cast<IntegerBaseType>(SrcType);
std::shared_ptr<RealType> DstRealType =
std::dynamic_pointer_cast<RealType>(DstType);
std::shared_ptr<RealType> SrcRealType =
std::dynamic_pointer_cast<RealType>(SrcType);
if (SrcRealType != nullptr && DstIntegerBaseType != nullptr) {
return builder->CreateFPToSI(v, DstType->GetLLVMType());
} else if (SrcIntegerBaseType != nullptr) {
if (DstRealType != nullptr) {
return builder->CreateSIToFP(v, DstType->GetLLVMType());
} else if (DstIntegerBaseType != nullptr) {
return builder->CreateSExtOrTrunc(v, DstType->GetLLVMType());
}
}
Log(LogLevel::PCC_ERROR, "unsupported type casting from %s to %s",
SrcType->GetCommonName(), DstType->GetCommonName());
return nullptr;
}
std::shared_ptr<PointerType>
TypeManager::GetPointerType(std::shared_ptr<Type> ElementType,
const char* CustomName) {
decltype(PointerTypes_)::iterator result = PointerTypes_.find(ElementType);
if (result != PointerTypes_.end()) {
return std::get<1>(*result);
}
std::shared_ptr<PointerType> NewType = std::make_shared<PointerType>(
ElementType, PointerDifferenceType_, PointerIndexType_,
CustomName == nullptr ? "^" + std::string(ElementType->GetCommonName())
: CustomName);
PointerTypes_.insert({ElementType, NewType});
return NewType;
}
std::shared_ptr<FunctionType> TypeManager::CreateFunctionType(
std::shared_ptr<Type> ReturnType,
std::vector<std::shared_ptr<Type>> ArgTypes) {
decltype(ArgTypes)::const_iterator ArgIt = ArgTypes.cbegin();
std::string name = " (*)(";
if (!ArgTypes.empty()) {
name.append((*ArgIt)->GetCommonName());
for (++ArgIt; ArgIt != ArgTypes.cend(); ++ArgIt) {
name.append(", ");
name.append((*ArgIt)->GetCommonName());
}
}
std::shared_ptr<FunctionType> NewType = std::make_shared<FunctionType>(
ReturnType, ArgTypes, ReturnType->GetCommonName() + name + ")");
FunctionTypes_.push_back(NewType);
return NewType;
}
} // namespace pcc
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