PPCMCExpr.h revision f7c1ee79fe90353fcd3f545f9d45a01a837bbf4b 
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/MCExpr.h"
14#include "llvm/MC/MCValue.h"
15#include "llvm/MC/MCAsmLayout.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  const int AssemblerDialect;
36
37  explicit PPCMCExpr(VariantKind _Kind, const MCExpr *_Expr,
38                     int _AssemblerDialect)
39    : Kind(_Kind), Expr(_Expr), AssemblerDialect(_AssemblerDialect) {}
40
41public:
42  /// @name Construction
43  /// @{
44
45  static const PPCMCExpr *Create(VariantKind Kind, const MCExpr *Expr,
46                                      MCContext &Ctx);
47
48  static const PPCMCExpr *CreateLo(const MCExpr *Expr, MCContext &Ctx) {
49    return Create(VK_PPC_LO, Expr, Ctx);
50  }
51
52  static const PPCMCExpr *CreateHi(const MCExpr *Expr, MCContext &Ctx) {
53    return Create(VK_PPC_HI, Expr, Ctx);
54  }
55
56  static const PPCMCExpr *CreateHa(const MCExpr *Expr, MCContext &Ctx) {
57    return Create(VK_PPC_HA, Expr, Ctx);
58  }
59
60  /// @}
61  /// @name Accessors
62  /// @{
63
64  /// getOpcode - Get the kind of this expression.
65  VariantKind getKind() const { return Kind; }
66
67  /// getSubExpr - Get the child of this expression.
68  const MCExpr *getSubExpr() const { return Expr; }
69
70  /// isDarwinSyntax - True if expression is to be printed using Darwin syntax.
71  bool isDarwinSyntax() const { return AssemblerDialect == 1; }
72
73
74  /// @}
75
76  void PrintImpl(raw_ostream &OS) const;
77  bool EvaluateAsRelocatableImpl(MCValue &Res,
78                                 const MCAsmLayout *Layout) const;
79  void AddValueSymbols(MCAssembler *) const;
80  const MCSection *FindAssociatedSection() const {
81    return getSubExpr()->FindAssociatedSection();
82  }
83
84  // There are no TLS PPCMCExprs at the moment.
85  void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const {}
86
87  static bool classof(const MCExpr *E) {
88    return E->getKind() == MCExpr::Target;
89  }
90};
91} // end namespace llvm
92
93#endif
94