PPCMCExpr.h revision 36b56886974eae4f9c5ebc96befd3e7bfe5de338 
1//===-- PPCMCExpr.h - PPC 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 PPCMCEXPR_H
11#define PPCMCEXPR_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 PPCMCExpr : public MCTargetExpr {
20public:
21  enum VariantKind {
22    VK_PPC_None,
23    VK_PPC_LO,
24    VK_PPC_HI,
25    VK_PPC_HA,
26    VK_PPC_HIGHER,
27    VK_PPC_HIGHERA,
28    VK_PPC_HIGHEST,
29    VK_PPC_HIGHESTA
30  };
31
32private:
33  const VariantKind Kind;
34  const MCExpr *Expr;
35  bool IsDarwin;
36
37  explicit PPCMCExpr(VariantKind _Kind, const MCExpr *_Expr,
38                     bool _IsDarwin)
39    : Kind(_Kind), Expr(_Expr), IsDarwin(_IsDarwin) {}
40
41public:
42  /// @name Construction
43  /// @{
44
45  static const PPCMCExpr *Create(VariantKind Kind, const MCExpr *Expr,
46                                 bool isDarwin, MCContext &Ctx);
47
48  static const PPCMCExpr *CreateLo(const MCExpr *Expr,
49                                   bool isDarwin, MCContext &Ctx) {
50    return Create(VK_PPC_LO, Expr, isDarwin, Ctx);
51  }
52
53  static const PPCMCExpr *CreateHi(const MCExpr *Expr,
54                                   bool isDarwin, MCContext &Ctx) {
55    return Create(VK_PPC_HI, Expr, isDarwin, Ctx);
56  }
57
58  static const PPCMCExpr *CreateHa(const MCExpr *Expr,
59                                   bool isDarwin, MCContext &Ctx) {
60    return Create(VK_PPC_HA, Expr, isDarwin, Ctx);
61  }
62
63  /// @}
64  /// @name Accessors
65  /// @{
66
67  /// getOpcode - Get the kind of this expression.
68  VariantKind getKind() const { return Kind; }
69
70  /// getSubExpr - Get the child of this expression.
71  const MCExpr *getSubExpr() const { return Expr; }
72
73  /// isDarwinSyntax - True if expression is to be printed using Darwin syntax.
74  bool isDarwinSyntax() const { return IsDarwin; }
75
76
77  /// @}
78
79  void PrintImpl(raw_ostream &OS) const;
80  bool EvaluateAsRelocatableImpl(MCValue &Res,
81                                 const MCAsmLayout *Layout) const;
82  void AddValueSymbols(MCAssembler *) const;
83  const MCSection *FindAssociatedSection() const {
84    return getSubExpr()->FindAssociatedSection();
85  }
86
87  // There are no TLS PPCMCExprs at the moment.
88  void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const {}
89
90  static bool classof(const MCExpr *E) {
91    return E->getKind() == MCExpr::Target;
92  }
93};
94} // end namespace llvm
95
96#endif
97