//===-- MipsMCExpr.h - Mips specific MC expression classes ------*- C++ -*-===//

//

//                     The LLVM Compiler Infrastructure

//

// This file is distributed under the University of Illinois Open Source

// License. See LICENSE.TXT for details.

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSMCEXPR_H

#define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSMCEXPR_H

#include "llvm/MC/MCAsmLayout.h"

#include "llvm/MC/MCExpr.h"

#include "llvm/MC/MCValue.h"

namespace llvm_ks {

class MipsMCExpr : public MCTargetExpr {

public:

  enum VariantKind {

    VK_Mips_None,

    VK_Mips_LO,

    VK_Mips_HI,

    VK_Mips_HIGHER,

    VK_Mips_HIGHEST

  };

private:

  const VariantKind Kind;

  const MCExpr *Expr;

  explicit MipsMCExpr(VariantKind Kind, const MCExpr *Expr)

    : Kind(Kind), Expr(Expr) {}

public:

  static bool isSupportedBinaryExpr(MCSymbolRefExpr::VariantKind VK,

                                    const MCBinaryExpr *BE);

  static const MipsMCExpr *create(MCSymbolRefExpr::VariantKind VK,

                                  const MCExpr *Expr, MCContext &Ctx);

  /// getOpcode - Get the kind of this expression.

  VariantKind getKind() const { return Kind; }

  /// getSubExpr - Get the child of this expression.

  const MCExpr *getSubExpr() const { return Expr; }

  void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;

  bool evaluateAsRelocatableImpl(MCValue &Res,

                                 const MCAsmLayout *Layout,

                                 const MCFixup *Fixup) const override;

  void visitUsedExpr(MCStreamer &Streamer) const override;

  MCFragment *findAssociatedFragment() const override {

    return getSubExpr()->findAssociatedFragment();

  }

  // There are no TLS MipsMCExprs at the moment.

  void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override {}

  static bool classof(const MCExpr *E) {

    return E->getKind() == MCExpr::Target;

  }

};

} // end namespace llvm_ks

#endif