Coverage Report

Created: 2019-07-24 05:18

/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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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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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16.7M
  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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55.3M
  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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11.5k
inline raw_ostream &operator<<(raw_ostream &OS, const MCExpr &E) {
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11.5k
  E.print(OS, nullptr);
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11.5k
  return OS;
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11.5k
}
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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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  bool PrintInHex = false;
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  explicit MCConstantExpr(int64_t Value)
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0
      : MCExpr(MCExpr::Constant, SMLoc()), Value(Value) {}
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  MCConstantExpr(int64_t Value, bool PrintInHex)
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      : MCExpr(MCExpr::Constant, SMLoc()), Value(Value),
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3.68M
        PrintInHex(PrintInHex) {}
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public:
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  /// \name Construction
148
  /// @{
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  static const MCConstantExpr *create(int64_t Value, MCContext &Ctx,
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                                      bool PrintInHex = false);
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  /// @}
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  /// \name Accessors
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  /// @{
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5.42M
  int64_t getValue() const { return Value; }
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644k
  bool useHexFormat() const { return PrintInHex; }
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  /// @}
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10.0M
  static bool classof(const MCExpr *E) {
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10.0M
    return E->getKind() == MCExpr::Constant;
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10.0M
  }
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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_WASM_TYPEINDEX, // Reference to a symbol's type (signature)
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    VK_WASM_MBREL,     // Memory address relative to memory base
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    VK_WASM_TBREL,     // Table index relative to table bare
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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_AMDGPU_ABS32_LO,      // symbol@abs32@lo
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    VK_AMDGPU_ABS32_HI,      // symbol@abs32@hi
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    VK_TPREL,
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    VK_DTPREL
309
  };
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private:
312
  /// The symbol reference modifier.
313
  const VariantKind Kind;
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  /// Specifies how the variant kind should be printed.
316
  const unsigned UseParensForSymbolVariant : 1;
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  // FIXME: Remove this bit.
319
  const unsigned HasSubsectionsViaSymbols : 1;
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321
  /// The symbol being referenced.
322
  const MCSymbol *Symbol;
323
324
  explicit MCSymbolRefExpr(const MCSymbol *Symbol, VariantKind Kind,
325
                           const MCAsmInfo *MAI, SMLoc Loc = SMLoc());
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327
public:
328
  /// \name Construction
329
  /// @{
330
331
4.26M
  static const MCSymbolRefExpr *create(const MCSymbol *Symbol, MCContext &Ctx) {
332
4.26M
    return MCSymbolRefExpr::create(Symbol, VK_None, Ctx);
333
4.26M
  }
334
335
  static const MCSymbolRefExpr *create(const MCSymbol *Symbol, VariantKind Kind,
336
                                       MCContext &Ctx, SMLoc Loc = SMLoc());
337
  static const MCSymbolRefExpr *create(StringRef Name, VariantKind Kind,
338
                                       MCContext &Ctx);
339
340
  /// @}
341
  /// \name Accessors
342
  /// @{
343
344
62.3M
  const MCSymbol &getSymbol() const { return *Symbol; }
345
346
17.1M
  VariantKind getKind() const { return Kind; }
347
348
  void printVariantKind(raw_ostream &OS) const;
349
350
1.31M
  bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; }
351
352
  /// @}
353
  /// \name Static Utility Functions
354
  /// @{
355
356
  static StringRef getVariantKindName(VariantKind Kind);
357
358
  static VariantKind getVariantKindForName(StringRef Name);
359
360
  /// @}
361
362
1.71M
  static bool classof(const MCExpr *E) {
363
1.71M
    return E->getKind() == MCExpr::SymbolRef;
364
1.71M
  }
365
};
366
367
/// Unary assembler expressions.
368
class MCUnaryExpr : public MCExpr {
369
public:
370
  enum Opcode {
371
    LNot,  ///< Logical negation.
372
    Minus, ///< Unary minus.
373
    Not,   ///< Bitwise negation.
374
    Plus   ///< Unary plus.
375
  };
376
377
private:
378
  Opcode Op;
379
  const MCExpr *Expr;
380
381
  MCUnaryExpr(Opcode Op, const MCExpr *Expr, SMLoc Loc)
382
37.5k
      : MCExpr(MCExpr::Unary, Loc), Op(Op), Expr(Expr) {}
383
384
public:
385
  /// \name Construction
386
  /// @{
387
388
  static const MCUnaryExpr *create(Opcode Op, const MCExpr *Expr,
389
                                   MCContext &Ctx, SMLoc Loc = SMLoc());
390
391
20
  static const MCUnaryExpr *createLNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
392
20
    return create(LNot, Expr, Ctx, Loc);
393
20
  }
394
395
37.2k
  static const MCUnaryExpr *createMinus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
396
37.2k
    return create(Minus, Expr, Ctx, Loc);
397
37.2k
  }
398
399
164
  static const MCUnaryExpr *createNot(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
400
164
    return create(Not, Expr, Ctx, Loc);
401
164
  }
402
403
44
  static const MCUnaryExpr *createPlus(const MCExpr *Expr, MCContext &Ctx, SMLoc Loc = SMLoc()) {
404
44
    return create(Plus, Expr, Ctx, Loc);
405
44
  }
406
407
  /// @}
408
  /// \name Accessors
409
  /// @{
410
411
  /// Get the kind of this unary expression.
412
37.5k
  Opcode getOpcode() const { return Op; }
413
414
  /// Get the child of this unary expression.
415
37.6k
  const MCExpr *getSubExpr() const { return Expr; }
416
417
  /// @}
418
419
11
  static bool classof(const MCExpr *E) {
420
11
    return E->getKind() == MCExpr::Unary;
421
11
  }
422
};
423
424
/// Binary assembler expressions.
425
class MCBinaryExpr : public MCExpr {
426
public:
427
  enum Opcode {
428
    Add,  ///< Addition.
429
    And,  ///< Bitwise and.
430
    Div,  ///< Signed division.
431
    EQ,   ///< Equality comparison.
432
    GT,   ///< Signed greater than comparison (result is either 0 or some
433
          ///< target-specific non-zero value)
434
    GTE,  ///< Signed greater than or equal comparison (result is either 0 or
435
          ///< some target-specific non-zero value).
436
    LAnd, ///< Logical and.
437
    LOr,  ///< Logical or.
438
    LT,   ///< Signed less than comparison (result is either 0 or
439
          ///< some target-specific non-zero value).
440
    LTE,  ///< Signed less than or equal comparison (result is either 0 or
441
          ///< some target-specific non-zero value).
442
    Mod,  ///< Signed remainder.
443
    Mul,  ///< Multiplication.
444
    NE,   ///< Inequality comparison.
445
    Or,   ///< Bitwise or.
446
    Shl,  ///< Shift left.
447
    AShr, ///< Arithmetic shift right.
448
    LShr, ///< Logical shift right.
449
    Sub,  ///< Subtraction.
450
    Xor   ///< Bitwise exclusive or.
451
  };
452
453
private:
454
  Opcode Op;
455
  const MCExpr *LHS, *RHS;
456
457
  MCBinaryExpr(Opcode Op, const MCExpr *LHS, const MCExpr *RHS,
458
               SMLoc Loc = SMLoc())
459
2.69M
      : MCExpr(MCExpr::Binary, Loc), Op(Op), LHS(LHS), RHS(RHS) {}
460
461
public:
462
  /// \name Construction
463
  /// @{
464
465
  static const MCBinaryExpr *create(Opcode Op, const MCExpr *LHS,
466
                                    const MCExpr *RHS, MCContext &Ctx,
467
                                    SMLoc Loc = SMLoc());
468
469
  static const MCBinaryExpr *createAdd(const MCExpr *LHS, const MCExpr *RHS,
470
528k
                                       MCContext &Ctx) {
471
528k
    return create(Add, LHS, RHS, Ctx);
472
528k
  }
473
474
  static const MCBinaryExpr *createAnd(const MCExpr *LHS, const MCExpr *RHS,
475
11
                                       MCContext &Ctx) {
476
11
    return create(And, LHS, RHS, Ctx);
477
11
  }
478
479
  static const MCBinaryExpr *createDiv(const MCExpr *LHS, const MCExpr *RHS,
480
5.68k
                                       MCContext &Ctx) {
481
5.68k
    return create(Div, LHS, RHS, Ctx);
482
5.68k
  }
483
484
  static const MCBinaryExpr *createEQ(const MCExpr *LHS, const MCExpr *RHS,
485
0
                                      MCContext &Ctx) {
486
0
    return create(EQ, LHS, RHS, Ctx);
487
0
  }
488
489
  static const MCBinaryExpr *createGT(const MCExpr *LHS, const MCExpr *RHS,
490
0
                                      MCContext &Ctx) {
491
0
    return create(GT, LHS, RHS, Ctx);
492
0
  }
493
494
  static const MCBinaryExpr *createGTE(const MCExpr *LHS, const MCExpr *RHS,
495
0
                                       MCContext &Ctx) {
496
0
    return create(GTE, LHS, RHS, Ctx);
497
0
  }
498
499
  static const MCBinaryExpr *createLAnd(const MCExpr *LHS, const MCExpr *RHS,
500
0
                                        MCContext &Ctx) {
501
0
    return create(LAnd, LHS, RHS, Ctx);
502
0
  }
503
504
  static const MCBinaryExpr *createLOr(const MCExpr *LHS, const MCExpr *RHS,
505
0
                                       MCContext &Ctx) {
506
0
    return create(LOr, LHS, RHS, Ctx);
507
0
  }
508
509
  static const MCBinaryExpr *createLT(const MCExpr *LHS, const MCExpr *RHS,
510
0
                                      MCContext &Ctx) {
511
0
    return create(LT, LHS, RHS, Ctx);
512
0
  }
513
514
  static const MCBinaryExpr *createLTE(const MCExpr *LHS, const MCExpr *RHS,
515
0
                                       MCContext &Ctx) {
516
0
    return create(LTE, LHS, RHS, Ctx);
517
0
  }
518
519
  static const MCBinaryExpr *createMod(const MCExpr *LHS, const MCExpr *RHS,
520
0
                                       MCContext &Ctx) {
521
0
    return create(Mod, LHS, RHS, Ctx);
522
0
  }
523
524
  static const MCBinaryExpr *createMul(const MCExpr *LHS, const MCExpr *RHS,
525
1
                                       MCContext &Ctx) {
526
1
    return create(Mul, LHS, RHS, Ctx);
527
1
  }
528
529
  static const MCBinaryExpr *createNE(const MCExpr *LHS, const MCExpr *RHS,
530
0
                                      MCContext &Ctx) {
531
0
    return create(NE, LHS, RHS, Ctx);
532
0
  }
533
534
  static const MCBinaryExpr *createOr(const MCExpr *LHS, const MCExpr *RHS,
535
0
                                      MCContext &Ctx) {
536
0
    return create(Or, LHS, RHS, Ctx);
537
0
  }
538
539
  static const MCBinaryExpr *createShl(const MCExpr *LHS, const MCExpr *RHS,
540
0
                                       MCContext &Ctx) {
541
0
    return create(Shl, LHS, RHS, Ctx);
542
0
  }
543
544
  static const MCBinaryExpr *createAShr(const MCExpr *LHS, const MCExpr *RHS,
545
0
                                       MCContext &Ctx) {
546
0
    return create(AShr, LHS, RHS, Ctx);
547
0
  }
548
549
  static const MCBinaryExpr *createLShr(const MCExpr *LHS, const MCExpr *RHS,
550
36.0k
                                       MCContext &Ctx) {
551
36.0k
    return create(LShr, LHS, RHS, Ctx);
552
36.0k
  }
553
554
  static const MCBinaryExpr *createSub(const MCExpr *LHS, const MCExpr *RHS,
555
724k
                                       MCContext &Ctx) {
556
724k
    return create(Sub, LHS, RHS, Ctx);
557
724k
  }
558
559
  static const MCBinaryExpr *createXor(const MCExpr *LHS, const MCExpr *RHS,
560
0
                                       MCContext &Ctx) {
561
0
    return create(Xor, LHS, RHS, Ctx);
562
0
  }
563
564
  /// @}
565
  /// \name Accessors
566
  /// @{
567
568
  /// Get the kind of this binary expression.
569
8.53M
  Opcode getOpcode() const { return Op; }
570
571
  /// Get the left-hand side expression of the binary operator.
572
10.0M
  const MCExpr *getLHS() const { return LHS; }
573
574
  /// Get the right-hand side expression of the binary operator.
575
10.0M
  const MCExpr *getRHS() const { return RHS; }
576
577
  /// @}
578
579
13.4k
  static bool classof(const MCExpr *E) {
580
13.4k
    return E->getKind() == MCExpr::Binary;
581
13.4k
  }
582
};
583
584
/// This is an extension point for target-specific MCExpr subclasses to
585
/// implement.
586
///
587
/// NOTE: All subclasses are required to have trivial destructors because
588
/// MCExprs are bump pointer allocated and not destructed.
589
class MCTargetExpr : public MCExpr {
590
  virtual void anchor();
591
592
protected:
593
442k
  MCTargetExpr() : MCExpr(Target, SMLoc()) {}
594
0
  virtual ~MCTargetExpr() = default;
595
596
public:
597
  virtual void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const = 0;
598
  virtual bool evaluateAsRelocatableImpl(MCValue &Res,
599
                                         const MCAsmLayout *Layout,
600
                                         const MCFixup *Fixup) const = 0;
601
  // allow Target Expressions to be checked for equality
602
0
  virtual bool isEqualTo(const MCExpr *x) const { return false; }
603
  // This should be set when assigned expressions are not valid ".set"
604
  // expressions, e.g. registers, and must be inlined.
605
0
  virtual bool inlineAssignedExpr() const { return false; }
606
  virtual void visitUsedExpr(MCStreamer& Streamer) const = 0;
607
  virtual MCFragment *findAssociatedFragment() const = 0;
608
609
  virtual void fixELFSymbolsInTLSFixups(MCAssembler &) const = 0;
610
611
7.48k
  static bool classof(const MCExpr *E) {
612
7.48k
    return E->getKind() == MCExpr::Target;
613
7.48k
  }
614
};
615
616
} // end namespace llvm
617
618
#endif // LLVM_MC_MCEXPR_H