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#include <vector>
#include "ExprNode.hh"
#include "Log.hh"
#include "TypeManager.hh"
namespace pcc {
ExprNode::ExprNode(Context* context)
: BaseNode(context) {}
std::shared_ptr<Type> ExprNode::GetType() { return type_; }
BinaryExprNode::BinaryExprNode(Context* context, BinaryOperator op,
std::shared_ptr<ExprNode> left,
std::shared_ptr<ExprNode> right)
: ExprNode(context)
, op_(op)
, left_(left)
, right_(right) {}
Value BinaryExprNode::CodeGen() {
Value lhs = left_->CodeGen();
Value rhs = right_->CodeGen();
if (lhs == nullptr || rhs == nullptr) {
return nullptr;
}
std::pair<std::shared_ptr<Type>, Value> result =
context_->GetTypeManager()->CreateOperation(
op_, left_->GetType(), right_->GetType(), lhs, rhs, context_);
if (std::get<1>(result) == nullptr) {
Log(LogLevel::PCC_ERROR, "failed to generate a binary expression");
return nullptr;
}
type_ = std::get<0>(result);
return std::get<1>(result);
}
UnaryExprNode::UnaryExprNode(Context* context, UnaryOperator op,
std::shared_ptr<ExprNode> value)
: ExprNode(context)
, op_(op)
, value_(value) {}
Value UnaryExprNode::CodeGen() {
Value v = value_->CodeGen();
if (v == nullptr) {
return nullptr;
}
Value result = context_->GetTypeManager()->CreateOperation(
op_, value_->GetType(), v, context_);
if (result == nullptr) {
Log(LogLevel::PCC_ERROR, "failed to generate a unary operation");
}
type_ = value_->GetType();
return result;
}
L2RCastingNode::L2RCastingNode(Context* context,
std::shared_ptr<ExprNode> lvalue)
: ExprNode(context)
, lvalue_(lvalue) {}
Value L2RCastingNode::CodeGen() {
Value left = lvalue_->CodeGen();
std::shared_ptr<PointerType> type =
std::dynamic_pointer_cast<PointerType>(lvalue_->GetType());
if (type == nullptr) {
Log(LogLevel::PCC_ERROR,
"type {0} is not a valid pointer type, this lvalue can't be loaded",
lvalue_->GetType()->GetCommonName());
}
type_ = type->GetElementType();
return context_->GetBuilder()->CreateLoad(type_->GetLLVMType(), left);
}
PointerAccessNode::PointerAccessNode(Context* context,
std::shared_ptr<ExprNode> lhs,
std::shared_ptr<ExprNode> rhs)
: ExprNode(context)
, lhs_(lhs)
, rhs_(rhs) {}
Value PointerAccessNode::CodeGen() {
Value left = lhs_->CodeGen();
Value right = rhs_->CodeGen();
std::shared_ptr<PointerType> pointer =
std::dynamic_pointer_cast<PointerType>(lhs_->GetType());
if (pointer == nullptr) {
Log(LogLevel::PCC_ERROR,
"type {0} is not a valid type for pointer access operator[]",
lhs_->GetType()->GetCommonName());
return nullptr;
}
Value CastedRight = context_->GetTypeManager()->CreateCast(
pointer->GetIndexType(), rhs_->GetType(), right, context_);
type_ = pointer;
return context_->GetBuilder()->CreateInBoundsGEP(left, CastedRight);
}
ArrayAccessNode::ArrayAccessNode(Context* context,
std::shared_ptr<ExprNode> lhs,
std::shared_ptr<ExprNode> rhs)
: ExprNode(context)
, lhs_(lhs)
, rhs_(rhs) {}
Value ArrayAccessNode::CodeGen() {
llvm::IRBuilder<>* builder = context_->GetBuilder();
TypeManager* manager = context_->GetTypeManager();
Value left = lhs_->CodeGen();
Value right = rhs_->CodeGen();
std::shared_ptr<PointerType> LeftType =
std::dynamic_pointer_cast<PointerType>(lhs_->GetType());
std::shared_ptr<Type> RightType = rhs_->GetType();
if (LeftType == nullptr) {
Log(LogLevel::PCC_ERROR,
"type {0} is not a valid type for array access operator[]",
lhs_->GetType()->GetCommonName());
return nullptr;
}
std::shared_ptr<Type> type = LeftType->GetElementType();
std::shared_ptr<ArrayType> array =
std::dynamic_pointer_cast<ArrayType>(type);
if (array != nullptr) {
std::shared_ptr<Type> IndexType = array->GetIndexType();
Value indices[2] = {llvm::ConstantInt::get(
manager->GetPointerIndexType()->GetLLVMType(), 0)};
if (array->GetIsZeroStarted() == false) {
Value ConvertedRight =
manager->CreateCast(IndexType, RightType, right, context_);
auto AdjustedRight = IndexType->CreateBinaryOperation(
BinaryOperator::SUB, right, array->GetIndexStart(), context_);
indices[1] = AdjustedRight;
} else {
indices[1] = right;
}
type_ = manager->GetPointerType(array->GetElementType());
return builder->CreateInBoundsGEP(left, indices);
}
std::shared_ptr<PointerType> pointer =
std::dynamic_pointer_cast<PointerType>(type);
if (pointer != nullptr) {
Value PointerValue = builder->CreateLoad(pointer->GetLLVMType(), left);
Value CastedRight = manager->CreateCast(
pointer->GetIndexType(), rhs_->GetType(), right, context_);
type_ = pointer;
return builder->CreateInBoundsGEP(PointerValue, CastedRight);
}
Log(LogLevel::PCC_ERROR,
"type {0} is not a valid lvalue type for array access operator[]",
lhs_->GetType()->GetCommonName());
return nullptr;
}
DereferenceNode::DereferenceNode(Context* context,
std::shared_ptr<ExprNode> lhs)
: ExprNode(context)
, lhs_(lhs) {}
Value DereferenceNode::CodeGen() {
Value value = lhs_->CodeGen();
std::shared_ptr<PointerType> pointer =
std::dynamic_pointer_cast<PointerType>(lhs_->GetType());
if (pointer == nullptr) {
Log(LogLevel::PCC_ERROR, "type {0} is not a valid type for dereference",
lhs_->GetType()->GetCommonName());
return nullptr;
}
Value zero = llvm::ConstantInt::get(
context_->GetTypeManager()->GetPointerIndexType()->GetLLVMType(), 0);
type_ = pointer;
return context_->GetBuilder()->CreateInBoundsGEP(value, zero);
}
MemberAccessNode::MemberAccessNode(Context* context,
std::shared_ptr<ExprNode> lhs,
std::string&& rhs)
: ExprNode(context)
, lhs_(lhs)
, rhs_(std::move(rhs)) {}
Value MemberAccessNode::CodeGen() {
llvm::IRBuilder<>* builder = context_->GetBuilder();
TypeManager* manager = context_->GetTypeManager();
Value left = lhs_->CodeGen();
std::shared_ptr<PointerType> LeftType =
std::dynamic_pointer_cast<PointerType>(lhs_->GetType());
if (LeftType == nullptr) {
Log(LogLevel::PCC_ERROR,
"type {0} is not a valid type for member access",
lhs_->GetType()->GetCommonName());
return nullptr;
}
std::shared_ptr<RecordType> LeftInner =
std::dynamic_pointer_cast<RecordType>(LeftType->GetElementType());
if (LeftInner == nullptr) {
Log(LogLevel::PCC_ERROR, "type {0} is not a record type",
LeftType->GetElementType()->GetCommonName());
return nullptr;
}
int MemberIndex;
std::shared_ptr<Type> MemberType;
std::tie(MemberIndex, MemberType) = LeftInner->GetMember(rhs_);
llvm::Type* IndexLLLVMType = manager->GetPointerIndexType()->GetLLVMType();
Value indices[2] = {llvm::ConstantInt::get(IndexLLLVMType, 0),
llvm::ConstantInt::get(IndexLLLVMType, MemberIndex)};
type_ = manager->GetPointerType(MemberType);
return builder->CreateInBoundsGEP(left, indices);
}
IdentifierNode::IdentifierNode(Context* context, const std::string& name)
: ExprNode(context)
, name_(name) {}
Value IdentifierNode::CodeGen() {
Variable var = context_->GetCurrentScope()->FindVariable(name_);
type_ = std::get<0>(var);
return std::get<1>(var);
}
FunctionCallNode::FunctionCallNode(Context* context, const std::string& name,
std::list<std::shared_ptr<ExprNode>>&& args)
: ExprNode(context)
, name_(name)
, args_(std::move(args)) {}
Value FunctionCallNode::CodeGen() {
TypeManager* manager = context_->GetTypeManager();
Function function = context_->FindFunction(name_);
std::shared_ptr<FunctionType> type = std::get<0>(function);
if (type == nullptr) {
Log(LogLevel::PCC_ERROR, "call to undefined function {0}",
name_.c_str());
return nullptr;
}
const std::vector<std::shared_ptr<Type>>& ArgTypes = type->GetArgTypes();
if (type->IsVariadic() == false && ArgTypes.size() != args_.size()) {
Log(LogLevel ::PCC_ERROR,
"argument number mismatch, {0} wanted, {1} given", ArgTypes.size(),
args_.size());
return nullptr;
}
std::vector<Value> ArgValues(args_.size());
auto ArgIt = args_.begin();
auto ArgValueIt = ArgValues.begin();
for (auto&& ArgType : ArgTypes) {
Value argv = (*ArgIt)->CodeGen();
Value ConvertedArgv =
manager->CreateCast(ArgType, (*ArgIt)->GetType(), argv, context_);
if (ConvertedArgv == nullptr) {
Log(LogLevel ::PCC_ERROR,
"argument type mismatch, the function type is {0}, an argument "
"of type {1} needed",
type->GetCommonName(), ArgType->GetCommonName());
}
*ArgValueIt = ConvertedArgv;
++ArgIt, ++ArgValueIt;
}
while (ArgIt != args_.end()) {
*ArgValueIt = (*ArgIt)->CodeGen();
++ArgIt, ++ArgValueIt;
}
type_ = type->GetReturnType();
return context_->GetBuilder()->CreateCall(std::get<1>(function), ArgValues);
}
} // namespace pcc
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