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// Nodes in flow graph: Abstract Operations
#pragma once
#include "data.h"
#include "storage.h"
#include <memory>
namespace FlowGraph {
// Node in Graph: Building block of the graph
// Abstracts actions of program flow, yet machine independent,
// to be converted later into machine code
// Basic elements:
// - Subroutine calls
// - Arithmetic/logical operations
// Arguments (Data instances) will be provided explicitly from outside
class Node
{
public:
Node(){}
Node(std::vector<Data> operands): mOperands(operands) {}
virtual ~Node() {}; // force class to be polymorphic (e.g. in a container)
std::vector<Data>& operands() { return mOperands; }
Data& destination(); // best-effort return of result/destination; else throw
private:
std::vector<Data> mOperands;
};
// Memory on Heap: new and delete
class AllocateDynamic: public Node
{
public:
AllocateDynamic(Data& location, Data& size):
Node(std::vector<Data>({location, size})) // in/out: Pointer; in: Size
{}
};
class DeallocateDynamic: public Node
{
public:
DeallocateDynamic(Data& location):
Node(std::vector<Data>({location})) // in: Pointer
{}
};
Data MakeConstantInt(int i);
Data MakeLocalInt(std::shared_ptr<FlowGraph::LocalScope> scope, const std::string& name);
Data MakeLocalPointer(std::shared_ptr<FlowGraph::LocalScope> scope, const std::string& name);
Data MakeTemporaryInt(std::shared_ptr<LocalScope> scope);
class MemCopy: public Node
{
public:
MemCopy(Data& destination, Data& source, Data& size): // Pointer, Pointer, size in bytes
Node(std::vector<Data>({destination, source, size}))
{}
};
class Move: public Node
{
public:
Move(Data& destination, Data& source):
Node(std::vector<Data>({destination, source}))
{}
};
enum class JumpVariant: int
{
Unconditional,
GT,
LT,
GE,
LE,
EQ,
NE
};
// Unconditional Jump, conditional Jump
class Jump: public Node
{
public:
Jump(JumpVariant variant, Data& source0, Data& source1, std::shared_ptr<Node> destination):
Node(std::vector<Data>({source0, source1})),
m_variant(variant),
m_destination(destination)
{}
JumpVariant variant() { return m_variant; }
private:
JumpVariant m_variant;
std::shared_ptr<Node> m_destination; // successor on branch
};
// Call Subroutine
class Call: public Node
{
public:
Call(std::shared_ptr<Node> destination, std::vector<Data> arguments):
Node(arguments),
m_destination(destination)
{}
private:
std::shared_ptr<Node> m_destination;
};
// Return from Subroutine
class Return: public Node
{
public:
Return(std::vector<Data> returnValues):
Node(returnValues)
{}
};
enum class UnaryOperationType: int
{
LogicalNot,
BitwiseNot,
Minus,
};
class UnaryOperation: public Node
{
public:
UnaryOperation(UnaryOperationType type, Data& destination, Data& source):
Node(std::vector<Data>({destination, source})),
m_type(type)
{}
UnaryOperationType type() { return m_type; }
private:
UnaryOperationType m_type;
};
// Just take a value e.g. Immediate and store it for later use.
// Should be optimized out later.
class DataNode: public Node
{
public:
DataNode(Data& value):
Node(std::vector<Data>({value}))
{}
};
enum class BinaryOperationType: int
{
Add,
Subtract,
Multiply,
Divide,
Modulo,
ShiftRight,
ShiftLeft,
BitwiseAnd,
BitwiseOr,
BitwiseXor,
BitwiseNot,
LogicalAnd,
LogicalOr,
LogicalNot
};
class BinaryOperation: public Node
{
public:
BinaryOperation(BinaryOperationType type, Data& destination, Data& source0, Data& source1):
Node(std::vector<Data>({destination, source0, source1})),
m_type(type)
{}
BinaryOperationType type() {return m_type;}
private:
BinaryOperationType m_type;
};
// Open a new scope, with stack frame
class CreateScopeOp: public Node
{
public:
CreateScopeOp();
std::shared_ptr<LocalScope> scope();
private:
std::shared_ptr<LocalScope> m_scope;
};
// Close current scope, closing stack frame
class DestroyScopeOp: public Node
{
public:
DestroyScopeOp(std::shared_ptr<LocalScope> scope);
private:
std::shared_ptr<LocalScope> m_scope;
};
} // namespace FlowGraph
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