MipsMCExpr.h revision 303975 
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 LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSMCEXPR_H
11#define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_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 MCAsmInfo *MAI) const override;
50  bool evaluateAsRelocatableImpl(MCValue &Res,
51                                 const MCAsmLayout *Layout,
52                                 const MCFixup *Fixup) const override;
53  void visitUsedExpr(MCStreamer &Streamer) const override;
54  MCFragment *findAssociatedFragment() const override {
55    return getSubExpr()->findAssociatedFragment();
56  }
57
58  // There are no TLS MipsMCExprs at the moment.
59  void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override {}
60
61  static bool classof(const MCExpr *E) {
62    return E->getKind() == MCExpr::Target;
63  }
64};
65} // end namespace llvm
66
67#endif
68