MipsMCExpr.h revision 36b56886974eae4f9c5ebc96befd3e7bfe5de338 
1//===-- MipsMCExpr.h - Mips specific MC expression classes ------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef MIPSMCEXPR_H
11#define MIPSMCEXPR_H
12
13#include "llvm/MC/MCAsmLayout.h"
14#include "llvm/MC/MCExpr.h"
15#include "llvm/MC/MCValue.h"
16
17namespace llvm {
18
19class MipsMCExpr : public MCTargetExpr {
20public:
21  enum VariantKind {
22    VK_Mips_None,
23    VK_Mips_LO,
24    VK_Mips_HI,
25    VK_Mips_HIGHER,
26    VK_Mips_HIGHEST
27  };
28
29private:
30  const VariantKind Kind;
31  const MCExpr *Expr;
32
33  explicit MipsMCExpr(VariantKind Kind, const MCExpr *Expr)
34    : Kind(Kind), Expr(Expr) {}
35
36public:
37  static bool isSupportedBinaryExpr(MCSymbolRefExpr::VariantKind VK,
38                                    const MCBinaryExpr *BE);
39
40  static const MipsMCExpr *Create(MCSymbolRefExpr::VariantKind VK,
41                                  const MCExpr *Expr, MCContext &Ctx);
42
43  /// getOpcode - Get the kind of this expression.
44  VariantKind getKind() const { return Kind; }
45
46  /// getSubExpr - Get the child of this expression.
47  const MCExpr *getSubExpr() const { return Expr; }
48
49  void PrintImpl(raw_ostream &OS) const;
50  bool EvaluateAsRelocatableImpl(MCValue &Res,
51                                 const MCAsmLayout *Layout) const;
52  void AddValueSymbols(MCAssembler *) const;
53  const MCSection *FindAssociatedSection() const {
54    return getSubExpr()->FindAssociatedSection();
55  }
56
57  // There are no TLS MipsMCExprs at the moment.
58  void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const {}
59
60  static bool classof(const MCExpr *E) {
61    return E->getKind() == MCExpr::Target;
62  }
63};
64} // end namespace llvm
65
66#endif
67