lib/Target/Mips/MCTargetDesc/MipsMCExpr.h

   1 //===- MipsMCExpr.h - Mips specific MC expression classes -------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSMCEXPR_H
  10 #define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSMCEXPR_H
  11
  12 #include "llvm/MC/MCAsmLayout.h"
  13 #include "llvm/MC/MCExpr.h"
  14 #include "llvm/MC/MCValue.h"
  15
  16 namespace llvm {
  17
  18 class MipsMCExpr : public MCTargetExpr {
  19 public:
  20   enum MipsExprKind {
  21     MEK_None,
  22     MEK_CALL_HI16,
  23     MEK_CALL_LO16,
  24     MEK_DTPREL,
  25     MEK_DTPREL_HI,
  26     MEK_DTPREL_LO,
  27     MEK_GOT,
  28     MEK_GOTTPREL,
  29     MEK_GOT_CALL,
  30     MEK_GOT_DISP,
  31     MEK_GOT_HI16,
  32     MEK_GOT_LO16,
  33     MEK_GOT_OFST,
  34     MEK_GOT_PAGE,
  35     MEK_GPREL,
  36     MEK_HI,
  37     MEK_HIGHER,
  38     MEK_HIGHEST,
  39     MEK_LO,
  40     MEK_NEG,
  41     MEK_PCREL_HI16,
  42     MEK_PCREL_LO16,
  43     MEK_TLSGD,
  44     MEK_TLSLDM,
  45     MEK_TPREL_HI,
  46     MEK_TPREL_LO,
  47     MEK_Special,
  48   };
  49
  50 private:
  51   const MipsExprKind Kind;
  52   const MCExpr *Expr;
  53
  54   explicit MipsMCExpr(MipsExprKind Kind, const MCExpr *Expr)
  55       : Kind(Kind), Expr(Expr) {}
  56
  57 public:
  58   static const MipsMCExpr *create(MipsExprKind Kind, const MCExpr *Expr,
  59                                   MCContext &Ctx);
  60   static const MipsMCExpr *createGpOff(MipsExprKind Kind, const MCExpr *Expr,
  61                                        MCContext &Ctx);
  62
  63   /// Get the kind of this expression.
  64   MipsExprKind getKind() const { return Kind; }
  65
  66   /// Get the child of this expression.
  67   const MCExpr *getSubExpr() const { return Expr; }
  68
  69   void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;
  70   bool evaluateAsRelocatableImpl(MCValue &Res, const MCAsmLayout *Layout,
  71                                  const MCFixup *Fixup) const override;
  72   void visitUsedExpr(MCStreamer &Streamer) const override;
  73
  74   MCFragment *findAssociatedFragment() const override {
  75     return getSubExpr()->findAssociatedFragment();
  76   }
  77
  78   void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override;
  79
  80   static bool classof(const MCExpr *E) {
  81     return E->getKind() == MCExpr::Target;
  82   }
  83
  84   bool isGpOff(MipsExprKind &Kind) const;
  85   bool isGpOff() const {
  86     MipsExprKind Kind;
  87     return isGpOff(Kind);
  88   }
  89 };
  90
  91 } // end namespace llvm
  92
  93 #endif // LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSMCEXPR_H