Coverage Report

Created: 2018-09-17 19:50

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/include/llvm/MC/MCExpr.h
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//===- MCExpr.h - Assembly Level Expressions --------------------*- C++ -*-===//
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//
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//                     The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCEXPR_H
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#define LLVM_MC_MCEXPR_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/Support/SMLoc.h"
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#include <cstdint>
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namespace llvm {
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class MCAsmInfo;
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class MCAsmLayout;
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class MCAssembler;
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class MCContext;
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class MCFixup;
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class MCFragment;
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class MCSection;
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class MCStreamer;
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class MCSymbol;
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class MCValue;
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class raw_ostream;
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class StringRef;
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using SectionAddrMap = DenseMap<const MCSection *, uint64_t>;
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/// Base class for the full range of assembler expressions which are
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/// needed for parsing.
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class MCExpr {
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public:
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  enum ExprKind {
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    Binary,    ///< Binary expressions.
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    Constant,  ///< Constant expressions.
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    SymbolRef, ///< References to labels and assigned expressions.
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    Unary,     ///< Unary expressions.
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    Target     ///< Target specific expression.
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  };
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private:
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  ExprKind Kind;
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  SMLoc Loc;
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  bool evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
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                          const MCAsmLayout *Layout,
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                          const SectionAddrMap *Addrs) const;
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  bool evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm,
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                          const MCAsmLayout *Layout,
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                          const SectionAddrMap *Addrs, bool InSet) const;
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protected:
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16.2M
  explicit MCExpr(ExprKind Kind, SMLoc Loc) : Kind(Kind), Loc(Loc) {}
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  bool evaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm,
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                                 const MCAsmLayout *Layout,
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                                 const MCFixup *Fixup,
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                                 const SectionAddrMap *Addrs, bool InSet) const;
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public:
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  MCExpr(const MCExpr &) = delete;
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  MCExpr &operator=(const MCExpr &) = delete;
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  /// \name Accessors
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  /// @{
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73
56.8M
  ExprKind getKind() const { return Kind; }
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11
  SMLoc getLoc() const { return Loc; }
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  /// @}
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  /// \name Utility Methods
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  /// @{
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  void print(raw_ostream &OS, const MCAsmInfo *MAI,
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             bool InParens = false) const;
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  void dump() const;
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  /// @}
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  /// \name Expression Evaluation
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  /// @{
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  /// Try to evaluate the expression to an absolute value.
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  ///
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  /// \param Res - The absolute value, if evaluation succeeds.
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  /// \param Layout - The assembler layout object to use for evaluating symbol
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  /// values. If not given, then only non-symbolic expressions will be
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  /// evaluated.
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  /// \return - True on success.
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  bool evaluateAsAbsolute(int64_t &Res, const MCAsmLayout &Layout,
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                          const SectionAddrMap &Addrs) const;
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  bool evaluateAsAbsolute(int64_t &Res) const;
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  bool evaluateAsAbsolute(int64_t &Res, const MCAssembler &Asm) const;
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  bool evaluateAsAbsolute(int64_t &Res, const MCAssembler *Asm) const;
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  bool evaluateAsAbsolute(int64_t &Res, const MCAsmLayout &Layout) const;
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  bool evaluateKnownAbsolute(int64_t &Res, const MCAsmLayout &Layout) const;
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  /// Try to evaluate the expression to a relocatable value, i.e. an
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  /// expression of the fixed form (a - b + constant).
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  ///
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  /// \param Res - The relocatable value, if evaluation succeeds.
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  /// \param Layout - The assembler layout object to use for evaluating values.
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  /// \param Fixup - The Fixup object if available.
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  /// \return - True on success.
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  bool evaluateAsRelocatable(MCValue &Res, const MCAsmLayout *Layout,
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                             const MCFixup *Fixup) const;
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  /// Try to evaluate the expression to the form (a - b + constant) where
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  /// neither a nor b are variables.
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  ///
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  /// This is a more aggressive variant of evaluateAsRelocatable. The intended
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  /// use is for when relocations are not available, like the .size directive.
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  bool evaluateAsValue(MCValue &Res, const MCAsmLayout &Layout) const;
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  /// Find the "associated section" for this expression, which is
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  /// currently defined as the absolute section for constants, or
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  /// otherwise the section associated with the first defined symbol in the
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  /// expression.
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  MCFragment *findAssociatedFragment() const;
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  /// @}
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};
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10.9k
inline raw_ostream &operator<<(raw_ostream &OS, const MCExpr &E) {
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10.9k
  E.print(OS, nullptr);
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10.9k
  return OS;
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10.9k
}
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////  Represent a constant integer expression.
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class MCConstantExpr : public MCExpr {
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  int64_t Value;
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  explicit MCConstantExpr(int64_t Value)
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3.05M
      : MCExpr(MCExpr::Constant, SMLoc()), Value(Value) {}
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public:
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  /// \name Construction
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  /// @{
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  static const MCConstantExpr *create(int64_t Value, MCContext &Ctx);
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  /// @}
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  /// \name Accessors
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  /// @{
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4.81M
  int64_t getValue() const { return Value; }
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  /// @}
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9.69M
  static bool classof(const MCExpr *E) {
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9.69M
    return E->getKind() == MCExpr::Constant;
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9.69M
  }
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};
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///  Represent a reference to a symbol from inside an expression.
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///
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/// A symbol reference in an expression may be a use of a label, a use of an
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/// assembler variable (defined constant), or constitute an implicit definition
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/// of the symbol as external.
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class MCSymbolRefExpr : public MCExpr {
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public:
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  enum VariantKind : uint16_t {
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    VK_None,
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    VK_Invalid,
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    VK_GOT,
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    VK_GOTOFF,
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    VK_GOTREL,
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    VK_GOTPCREL,
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    VK_GOTTPOFF,
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    VK_INDNTPOFF,
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    VK_NTPOFF,
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    VK_GOTNTPOFF,
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    VK_PLT,
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    VK_TLSGD,
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    VK_TLSLD,
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    VK_TLSLDM,
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    VK_TPOFF,
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    VK_DTPOFF,
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    VK_TLSCALL,   // symbol(tlscall)
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    VK_TLSDESC,   // symbol(tlsdesc)
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    VK_TLVP,      // Mach-O thread local variable relocations
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    VK_TLVPPAGE,
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    VK_TLVPPAGEOFF,
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    VK_PAGE,
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    VK_PAGEOFF,
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    VK_GOTPAGE,
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    VK_GOTPAGEOFF,
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    VK_SECREL,
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    VK_SIZE,      // symbol@SIZE
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    VK_WEAKREF,   // The link between the symbols in .weakref foo, bar
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    VK_X86_ABS8,
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    VK_ARM_NONE,
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    VK_ARM_GOT_PREL,
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    VK_ARM_TARGET1,
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    VK_ARM_TARGET2,
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    VK_ARM_PREL31,
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    VK_ARM_SBREL,          // symbol(sbrel)
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    VK_ARM_TLSLDO,         // symbol(tlsldo)
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    VK_ARM_TLSDESCSEQ,
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    VK_AVR_NONE,
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    VK_AVR_LO8,
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    VK_AVR_HI8,
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    VK_AVR_HLO8,
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    VK_AVR_DIFF8,
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    VK_AVR_DIFF16,
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    VK_AVR_DIFF32,
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    VK_PPC_LO,             // symbol@l
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    VK_PPC_HI,             // symbol@h
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    VK_PPC_HA,             // symbol@ha
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    VK_PPC_HIGH,           // symbol@high
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    VK_PPC_HIGHA,          // symbol@higha
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    VK_PPC_HIGHER,         // symbol@higher
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    VK_PPC_HIGHERA,        // symbol@highera
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    VK_PPC_HIGHEST,        // symbol@highest
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    VK_PPC_HIGHESTA,       // symbol@highesta
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    VK_PPC_GOT_LO,         // symbol@got@l
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    VK_PPC_GOT_HI,         // symbol@got@h
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    VK_PPC_GOT_HA,         // symbol@got@ha
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    VK_PPC_TOCBASE,        // symbol@tocbase
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    VK_PPC_TOC,            // symbol@toc
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    VK_PPC_TOC_LO,         // symbol@toc@l
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    VK_PPC_TOC_HI,         // symbol@toc@h
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    VK_PPC_TOC_HA,         // symbol@toc@ha
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    VK_PPC_DTPMOD,         // symbol@dtpmod
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    VK_PPC_TPREL_LO,       // symbol@tprel@l
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    VK_PPC_TPREL_HI,       // symbol@tprel@h
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    VK_PPC_TPREL_HA,       // symbol@tprel@ha
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    VK_PPC_TPREL_HIGH,     // symbol@tprel@high
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    VK_PPC_TPREL_HIGHA,    // symbol@tprel@higha
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    VK_PPC_TPREL_HIGHER,   // symbol@tprel@higher
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    VK_PPC_TPREL_HIGHERA,  // symbol@tprel@highera
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    VK_PPC_TPREL_HIGHEST,  // symbol@tprel@highest
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    VK_PPC_TPREL_HIGHESTA, // symbol@tprel@highesta
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    VK_PPC_DTPREL_LO,      // symbol@dtprel@l
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    VK_PPC_DTPREL_HI,      // symbol@dtprel@h
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    VK_PPC_DTPREL_HA,      // symbol@dtprel@ha
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    VK_PPC_DTPREL_HIGH,    // symbol@dtprel@high
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    VK_PPC_DTPREL_HIGHA,   // symbol@dtprel@higha
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    VK_PPC_DTPREL_HIGHER,  // symbol@dtprel@higher
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    VK_PPC_DTPREL_HIGHERA, // symbol@dtprel@highera
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    VK_PPC_DTPREL_HIGHEST, // symbol@dtprel@highest
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    VK_PPC_DTPREL_HIGHESTA,// symbol@dtprel@highesta
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    VK_PPC_GOT_TPREL,      // symbol@got@tprel
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    VK_PPC_GOT_TPREL_LO,   // symbol@got@tprel@l
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    VK_PPC_GOT_TPREL_HI,   // symbol@got@tprel@h
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    VK_PPC_GOT_TPREL_HA,   // symbol@got@tprel@ha
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    VK_PPC_GOT_DTPREL,     // symbol@got@dtprel
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    VK_PPC_GOT_DTPREL_LO,  // symbol@got@dtprel@l
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    VK_PPC_GOT_DTPREL_HI,  // symbol@got@dtprel@h
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    VK_PPC_GOT_DTPREL_HA,  // symbol@got@dtprel@ha
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    VK_PPC_TLS,            // symbol@tls
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    VK_PPC_GOT_TLSGD,      // symbol@got@tlsgd
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    VK_PPC_GOT_TLSGD_LO,   // symbol@got@tlsgd@l
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    VK_PPC_GOT_TLSGD_HI,   // symbol@got@tlsgd@h
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    VK_PPC_GOT_TLSGD_HA,   // symbol@got@tlsgd@ha
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    VK_PPC_TLSGD,          // symbol@tlsgd
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    VK_PPC_GOT_TLSLD,      // symbol@got@tlsld
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    VK_PPC_GOT_TLSLD_LO,   // symbol@got@tlsld@l
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    VK_PPC_GOT_TLSLD_HI,   // symbol@got@tlsld@h
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    VK_PPC_GOT_TLSLD_HA,   // symbol@got@tlsld@ha
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    VK_PPC_TLSLD,          // symbol@tlsld
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    VK_PPC_LOCAL,          // symbol@local
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    VK_COFF_IMGREL32, // symbol@imgrel (image-relative)
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    VK_Hexagon_PCREL,
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    VK_Hexagon_LO16,
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    VK_Hexagon_HI16,
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    VK_Hexagon_GPREL,
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    VK_Hexagon_GD_GOT,
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    VK_Hexagon_LD_GOT,
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    VK_Hexagon_GD_PLT,
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    VK_Hexagon_LD_PLT,
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    VK_Hexagon_IE,
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    VK_Hexagon_IE_GOT,
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    VK_WebAssembly_FUNCTION, // Function table index, rather than virtual addr
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    VK_WebAssembly_GLOBAL,   // Global object index
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    VK_WebAssembly_TYPEINDEX,// Type table index
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    VK_AMDGPU_GOTPCREL32_LO, // symbol@gotpcrel32@lo
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    VK_AMDGPU_GOTPCREL32_HI, // symbol@gotpcrel32@hi
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    VK_AMDGPU_REL32_LO,      // symbol@rel32@lo
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    VK_AMDGPU_REL32_HI,      // symbol@rel32@hi
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    VK_AMDGPU_REL64,         // symbol@rel64
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    VK_TPREL,
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    VK_DTPREL
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  };
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private:
303
  /// The symbol reference modifier.
304
  const VariantKind Kind;
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  /// Specifies how the variant kind should be printed.
307
  const unsigned UseParensForSymbolVariant : 1;
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309
  // FIXME: Remove this bit.
310
  const unsigned HasSubsectionsViaSymbols : 1;
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  /// The symbol being referenced.
313
  const MCSymbol *Symbol;
314
315
  explicit MCSymbolRefExpr(const MCSymbol *Symbol, VariantKind Kind,
316
                           const MCAsmInfo *MAI, SMLoc Loc = SMLoc());
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318
public:
319
  /// \name Construction
320
  /// @{
321
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4.25M
  static const MCSymbolRefExpr *create(const MCSymbol *Symbol, MCContext &Ctx) {
323
4.25M
    return MCSymbolRefExpr::create(Symbol, VK_None, Ctx);
324
4.25M
  }
325
326
  static const MCSymbolRefExpr *create(const MCSymbol *Symbol, VariantKind Kind,
327
                                       MCContext &Ctx, SMLoc Loc = SMLoc());
328
  static const MCSymbolRefExpr *create(StringRef Name, VariantKind Kind,
329
                                       MCContext &Ctx);
330
331
  /// @}
332
  /// \name Accessors
333
  /// @{
334
335
66.7M
  const MCSymbol &getSymbol() const { return *Symbol; }
336
337
18.3M
  VariantKind getKind() const { return Kind; }
338
339
  void printVariantKind(raw_ostream &OS) const;
340
341
1.46M
  bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; }
342
343
  /// @}
344
  /// \name Static Utility Functions
345
  /// @{
346
347
  static StringRef getVariantKindName(VariantKind Kind);
348
349
  static VariantKind getVariantKindForName(StringRef Name);
350
351
  /// @}
352
353
1.71M
  static bool classof(const MCExpr *E) {
354
1.71M
    return E->getKind() == MCExpr::SymbolRef;
355
1.71M
  }
356
};
357
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/// Unary assembler expressions.
359
class MCUnaryExpr : public MCExpr {
360
public:
361
  enum Opcode {
362
    LNot,  ///< Logical negation.
363
    Minus, ///< Unary minus.
364
    Not,   ///< Bitwise negation.
365
    Plus   ///< Unary plus.
366
  };
367
368
private:
369
  Opcode Op;
370
  const MCExpr *Expr;
371
372
  MCUnaryExpr(Opcode Op, const MCExpr *Expr, SMLoc Loc)
373
20.3k
      : MCExpr(MCExpr::Unary, Loc), Op(Op), Expr(Expr) {}
374
375
public:
376
  /// \name Construction
377
  /// @{
378
379
  static const MCUnaryExpr *create(Opcode Op, const MCExpr *Expr,
380
                                   MCContext &Ctx, SMLoc Loc = SMLoc());
381
382
4
  static const MCUnaryExpr *createLNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
383
4
    return create(LNot, Expr, Ctx, Loc);
384
4
  }
385
386
20.1k
  static const MCUnaryExpr *createMinus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
387
20.1k
    return create(Minus, Expr, Ctx, Loc);
388
20.1k
  }
389
390
148
  static const MCUnaryExpr *createNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
391
148
    return create(Not, Expr, Ctx, Loc);
392
148
  }
393
394
21
  static const MCUnaryExpr *createPlus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
395
21
    return create(Plus, Expr, Ctx, Loc);
396
21
  }
397
398
  /// @}
399
  /// \name Accessors
400
  /// @{
401
402
  /// Get the kind of this unary expression.
403
20.3k
  Opcode getOpcode() const { return Op; }
404
405
  /// Get the child of this unary expression.
406
20.4k
  const MCExpr *getSubExpr() const { return Expr; }
407
408
  /// @}
409
410
6
  static bool classof(const MCExpr *E) {
411
6
    return E->getKind() == MCExpr::Unary;
412
6
  }
413
};
414
415
/// Binary assembler expressions.
416
class MCBinaryExpr : public MCExpr {
417
public:
418
  enum Opcode {
419
    Add,  ///< Addition.
420
    And,  ///< Bitwise and.
421
    Div,  ///< Signed division.
422
    EQ,   ///< Equality comparison.
423
    GT,   ///< Signed greater than comparison (result is either 0 or some
424
          ///< target-specific non-zero value)
425
    GTE,  ///< Signed greater than or equal comparison (result is either 0 or
426
          ///< some target-specific non-zero value).
427
    LAnd, ///< Logical and.
428
    LOr,  ///< Logical or.
429
    LT,   ///< Signed less than comparison (result is either 0 or
430
          ///< some target-specific non-zero value).
431
    LTE,  ///< Signed less than or equal comparison (result is either 0 or
432
          ///< some target-specific non-zero value).
433
    Mod,  ///< Signed remainder.
434
    Mul,  ///< Multiplication.
435
    NE,   ///< Inequality comparison.
436
    Or,   ///< Bitwise or.
437
    Shl,  ///< Shift left.
438
    AShr, ///< Arithmetic shift right.
439
    LShr, ///< Logical shift right.
440
    Sub,  ///< Subtraction.
441
    Xor   ///< Bitwise exclusive or.
442
  };
443
444
private:
445
  Opcode Op;
446
  const MCExpr *LHS, *RHS;
447
448
  MCBinaryExpr(Opcode Op, const MCExpr *LHS, const MCExpr *RHS,
449
               SMLoc Loc = SMLoc())
450
2.84M
      : MCExpr(MCExpr::Binary, Loc), Op(Op), LHS(LHS), RHS(RHS) {}
451
452
public:
453
  /// \name Construction
454
  /// @{
455
456
  static const MCBinaryExpr *create(Opcode Op, const MCExpr *LHS,
457
                                    const MCExpr *RHS, MCContext &Ctx,
458
                                    SMLoc Loc = SMLoc());
459
460
  static const MCBinaryExpr *createAdd(const MCExpr *LHS, const MCExpr *RHS,
461
580k
                                       MCContext &Ctx) {
462
580k
    return create(Add, LHS, RHS, Ctx);
463
580k
  }
464
465
  static const MCBinaryExpr *createAnd(const MCExpr *LHS, const MCExpr *RHS,
466
12
                                       MCContext &Ctx) {
467
12
    return create(And, LHS, RHS, Ctx);
468
12
  }
469
470
  static const MCBinaryExpr *createDiv(const MCExpr *LHS, const MCExpr *RHS,
471
4.63k
                                       MCContext &Ctx) {
472
4.63k
    return create(Div, LHS, RHS, Ctx);
473
4.63k
  }
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475
  static const MCBinaryExpr *createEQ(const MCExpr *LHS, const MCExpr *RHS,
476
                                      MCContext &Ctx) {
477
    return create(EQ, LHS, RHS, Ctx);
478
  }
479
480
  static const MCBinaryExpr *createGT(const MCExpr *LHS, const MCExpr *RHS,
481
                                      MCContext &Ctx) {
482
    return create(GT, LHS, RHS, Ctx);
483
  }
484
485
  static const MCBinaryExpr *createGTE(const MCExpr *LHS, const MCExpr *RHS,
486
                                       MCContext &Ctx) {
487
    return create(GTE, LHS, RHS, Ctx);
488
  }
489
490
  static const MCBinaryExpr *createLAnd(const MCExpr *LHS, const MCExpr *RHS,
491
                                        MCContext &Ctx) {
492
    return create(LAnd, LHS, RHS, Ctx);
493
  }
494
495
  static const MCBinaryExpr *createLOr(const MCExpr *LHS, const MCExpr *RHS,
496
                                       MCContext &Ctx) {
497
    return create(LOr, LHS, RHS, Ctx);
498
  }
499
500
  static const MCBinaryExpr *createLT(const MCExpr *LHS, const MCExpr *RHS,
501
                                      MCContext &Ctx) {
502
    return create(LT, LHS, RHS, Ctx);
503
  }
504
505
  static const MCBinaryExpr *createLTE(const MCExpr *LHS, const MCExpr *RHS,
506
                                       MCContext &Ctx) {
507
    return create(LTE, LHS, RHS, Ctx);
508
  }
509
510
  static const MCBinaryExpr *createMod(const MCExpr *LHS, const MCExpr *RHS,
511
0
                                       MCContext &Ctx) {
512
0
    return create(Mod, LHS, RHS, Ctx);
513
0
  }
514
515
  static const MCBinaryExpr *createMul(const MCExpr *LHS, const MCExpr *RHS,
516
1
                                       MCContext &Ctx) {
517
1
    return create(Mul, LHS, RHS, Ctx);
518
1
  }
519
520
  static const MCBinaryExpr *createNE(const MCExpr *LHS, const MCExpr *RHS,
521
                                      MCContext &Ctx) {
522
    return create(NE, LHS, RHS, Ctx);
523
  }
524
525
  static const MCBinaryExpr *createOr(const MCExpr *LHS, const MCExpr *RHS,
526
0
                                      MCContext &Ctx) {
527
0
    return create(Or, LHS, RHS, Ctx);
528
0
  }
529
530
  static const MCBinaryExpr *createShl(const MCExpr *LHS, const MCExpr *RHS,
531
0
                                       MCContext &Ctx) {
532
0
    return create(Shl, LHS, RHS, Ctx);
533
0
  }
534
535
  static const MCBinaryExpr *createAShr(const MCExpr *LHS, const MCExpr *RHS,
536
                                       MCContext &Ctx) {
537
    return create(AShr, LHS, RHS, Ctx);
538
  }
539
540
  static const MCBinaryExpr *createLShr(const MCExpr *LHS, const MCExpr *RHS,
541
5
                                       MCContext &Ctx) {
542
5
    return create(LShr, LHS, RHS, Ctx);
543
5
  }
544
545
  static const MCBinaryExpr *createSub(const MCExpr *LHS, const MCExpr *RHS,
546
686k
                                       MCContext &Ctx) {
547
686k
    return create(Sub, LHS, RHS, Ctx);
548
686k
  }
549
550
  static const MCBinaryExpr *createXor(const MCExpr *LHS, const MCExpr *RHS,
551
0
                                       MCContext &Ctx) {
552
0
    return create(Xor, LHS, RHS, Ctx);
553
0
  }
554
555
  /// @}
556
  /// \name Accessors
557
  /// @{
558
559
  /// Get the kind of this binary expression.
560
9.25M
  Opcode getOpcode() const { return Op; }
561
562
  /// Get the left-hand side expression of the binary operator.
563
10.7M
  const MCExpr *getLHS() const { return LHS; }
564
565
  /// Get the right-hand side expression of the binary operator.
566
10.7M
  const MCExpr *getRHS() const { return RHS; }
567
568
  /// @}
569
570
14.0k
  static bool classof(const MCExpr *E) {
571
14.0k
    return E->getKind() == MCExpr::Binary;
572
14.0k
  }
573
};
574
575
/// This is an extension point for target-specific MCExpr subclasses to
576
/// implement.
577
///
578
/// NOTE: All subclasses are required to have trivial destructors because
579
/// MCExprs are bump pointer allocated and not destructed.
580
class MCTargetExpr : public MCExpr {
581
  virtual void anchor();
582
583
protected:
584
137k
  MCTargetExpr() : MCExpr(Target, SMLoc()) {}
585
0
  virtual ~MCTargetExpr() = default;
586
587
public:
588
  virtual void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const = 0;
589
  virtual bool evaluateAsRelocatableImpl(MCValue &Res,
590
                                         const MCAsmLayout *Layout,
591
                                         const MCFixup *Fixup) const = 0;
592
  // allow Target Expressions to be checked for equality
593
0
  virtual bool isEqualTo(const MCExpr *x) const { return false; }
594
  // This should be set when assigned expressions are not valid ".set"
595
  // expressions, e.g. registers, and must be inlined.
596
0
  virtual bool inlineAssignedExpr() const { return false; }
597
  virtual void visitUsedExpr(MCStreamer& Streamer) const = 0;
598
  virtual MCFragment *findAssociatedFragment() const = 0;
599
600
  virtual void fixELFSymbolsInTLSFixups(MCAssembler &) const = 0;
601
602
5.38k
  static bool classof(const MCExpr *E) {
603
5.38k
    return E->getKind() == MCExpr::Target;
604
5.38k
  }
605
};
606
607
} // end namespace llvm
608
609
#endif // LLVM_MC_MCEXPR_H