phi.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 "core/inst.h"
 
 
 
class PhiInst final : public Inst {
public:
  static constexpr Inst::Kind kInstKind = Inst::Kind::PHI;
 
public:
  PhiInst(Type type, AnnotSet &&annot = {});
  PhiInst(Type type, const AnnotSet &annot);
 
  unsigned GetNumRets() const override;
  Type GetType(unsigned i) const override;
 
  void Add(Block *block, Ref<Inst> value);
 
  unsigned GetNumIncoming() const;
 
  void SetBlock(unsigned i, Block *block);
  const Block *GetBlock(unsigned i) const;
  Block *GetBlock(unsigned i);
 
  void SetValue(unsigned i, Ref<Inst> value);
  ConstRef<Inst> GetValue(unsigned i) const;
  Ref<Inst> GetValue(unsigned i);
  Ref<Inst> GetValue(const Block *block);
  inline ConstRef<Inst> GetValue(const Block *block) const
  {
    return const_cast<PhiInst *>(this)->GetValue(block);
  }
 
  void Remove(const Block *block);
  bool HasValue(const Block *block) const;
 
  Type GetType() const { return type_; }
 
  bool HasSideEffects() const override { return false; }
  bool IsConstant() const override { return false; }
  bool IsReturn() const override { return false; }
 
private:
  Type type_;
};