expr.h

// This file if part of the llir-opt project.
// Licensing information can be found in the LICENSE file.
// (C) 2018 Nandor Licker. All rights reserved.
 
#pragma once
 
#include <cstdint>
 
#include "core/user.h"
 
class Context;
class Global;
 
 
 
class Expr : public User {
public:
  static constexpr Value::Kind kValueKind = Value::Kind::EXPR;
 
public:
  enum Kind {
    SYMBOL_OFFSET,
  };
 
  virtual ~Expr();
 
  Kind GetKind() const { return kind_; }
 
  bool Is(Kind kind) const { return GetKind() == kind; }
 
protected:
  Expr(Kind kind, unsigned numOps)
    : User(Value::Kind::EXPR, numOps)
    , kind_(kind)
  {
  }
 
private:
  const Kind kind_;
};
 
 
class SymbolOffsetExpr final : public Expr {
public:
  static constexpr Expr::Kind kExprKind = Expr::Kind::SYMBOL_OFFSET;
 
public:
  static SymbolOffsetExpr *Create(Global *sym, int64_t offset);
  ~SymbolOffsetExpr();
 
  const Global *GetSymbol() const;
  Global *GetSymbol();
 
  int64_t GetOffset() const { return offset_; }
 
private:
  SymbolOffsetExpr(Global *sym, int64_t offset);
 
private:
  int64_t offset_;
};