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 
17 namespace llvm {
18 
19 class MipsMCExpr : public MCTargetExpr {
20 public:
21   enum MipsExprKind {
22     MEK_None,
23     MEK_CALL_HI16,
24     MEK_CALL_LO16,
25     MEK_DTPREL,
26     MEK_DTPREL_HI,
27     MEK_DTPREL_LO,
28     MEK_GOT,
29     MEK_GOTTPREL,
30     MEK_GOT_CALL,
31     MEK_GOT_DISP,
32     MEK_GOT_HI16,
33     MEK_GOT_LO16,
34     MEK_GOT_OFST,
35     MEK_GOT_PAGE,
36     MEK_GPREL,
37     MEK_HI,
38     MEK_HIGHER,
39     MEK_HIGHEST,
40     MEK_LO,
41     MEK_NEG,
42     MEK_PCREL_HI16,
43     MEK_PCREL_LO16,
44     MEK_TLSGD,
45     MEK_TLSLDM,
46     MEK_TPREL_HI,
47     MEK_TPREL_LO,
48     MEK_Special,
49   };
50 
51 private:
52   const MipsExprKind Kind;
53   const MCExpr *Expr;
54 
MipsMCExpr(MipsExprKind Kind,const MCExpr * Expr)55   explicit MipsMCExpr(MipsExprKind Kind, const MCExpr *Expr)
56       : Kind(Kind), Expr(Expr) {}
57 
58 public:
59   static const MipsMCExpr *create(MipsExprKind Kind, const MCExpr *Expr,
60                                   MCContext &Ctx);
61   static const MipsMCExpr *createGpOff(MipsExprKind Kind, const MCExpr *Expr,
62                                        MCContext &Ctx);
63 
64   /// Get the kind of this expression.
getKind()65   MipsExprKind getKind() const { return Kind; }
66 
67   /// Get the child of this expression.
getSubExpr()68   const MCExpr *getSubExpr() const { return Expr; }
69 
70   void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;
71   bool evaluateAsRelocatableImpl(MCValue &Res, const MCAsmLayout *Layout,
72                                  const MCFixup *Fixup) const override;
73   void visitUsedExpr(MCStreamer &Streamer) const override;
74 
findAssociatedFragment()75   MCFragment *findAssociatedFragment() const override {
76     return getSubExpr()->findAssociatedFragment();
77   }
78 
79   void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override;
80 
classof(const MCExpr * E)81   static bool classof(const MCExpr *E) {
82     return E->getKind() == MCExpr::Target;
83   }
84 
85   bool isGpOff(MipsExprKind &Kind) const;
isGpOff()86   bool isGpOff() const {
87     MipsExprKind Kind;
88     return isGpOff(Kind);
89   }
90 };
91 
92 } // end namespace llvm
93 
94 #endif // LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSMCEXPR_H
95