text: //===-- llvm/MC/MCAsmInfo.h - Asm info --------------------------*- C++ -*-===//
  //
  // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  // See https://llvm.org/LICENSE.txt for license information.
  // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  //
  //===----------------------------------------------------------------------===//
  //
  // This file contains a class to be used as the basis for target specific
  // asm writers.  This class primarily takes care of global printing constants,
  // which are used in very similar ways across all targets.
  //
  //===----------------------------------------------------------------------===//
  
  #ifndef LLVM_MC_MCASMINFO_H
  #define LLVM_MC_MCASMINFO_H
  
  #include "llvm/ADT/StringRef.h"
  #include "llvm/MC/MCDirectives.h"
  #include "llvm/MC/MCTargetOptions.h"
  #include <vector>
  
  namespace llvm {
  
  class MCContext;
  class MCCFIInstruction;
  class MCExpr;
  class MCSection;
  class MCStreamer;
  class MCSubtargetInfo;
  class MCSymbol;
  
  namespace WinEH {
  
  enum class EncodingType {
    Invalid, /// Invalid
    Alpha,   /// Windows Alpha
    Alpha64, /// Windows AXP64
    ARM,     /// Windows NT (Windows on ARM)
    CE,      /// Windows CE ARM, PowerPC, SH3, SH4
    Itanium, /// Windows x64, Windows Itanium (IA-64)
    X86,     /// Windows x86, uses no CFI, just EH tables
    MIPS = Alpha,
  };
  
  } // end namespace WinEH
  
  namespace LCOMM {
  
  enum LCOMMType { NoAlignment, ByteAlignment, Log2Alignment };
  
  } // end namespace LCOMM
  
  /// This class is intended to be used as a base class for asm
  /// properties and features specific to the target.
  class MCAsmInfo {
  public:
    /// Assembly character literal syntax types.
    enum AsmCharLiteralSyntax {
      ACLS_Unknown, /// Unknown; character literals not used by LLVM for this
                    /// target.
      ACLS_SingleQuotePrefix, /// The desired character is prefixed by a single
                              /// quote, e.g., `'A`.
    };
  
  protected:
    //===------------------------------------------------------------------===//
    // Properties to be set by the target writer, used to configure asm printer.
    //
  
    /// Code pointer size in bytes.  Default is 4.
    unsigned CodePointerSize = 4;
  
    /// Size of the stack slot reserved for callee-saved registers, in bytes.
    /// Default is same as pointer size.
    unsigned CalleeSaveStackSlotSize = 4;
  
    /// True if target is little endian.  Default is true.
    bool IsLittleEndian = true;
  
    /// True if target stack grow up.  Default is false.
    bool StackGrowsUp = false;
  
    /// True if this target has the MachO .subsections_via_symbols directive.
    /// Default is false.
    bool HasSubsectionsViaSymbols = false;
  
    /// True if this is a MachO target that supports the macho-specific .zerofill
    /// directive for emitting BSS Symbols.  Default is false.
    bool HasMachoZeroFillDirective = false;
  
    /// True if this is a MachO target that supports the macho-specific .tbss
    /// directive for emitting thread local BSS Symbols.  Default is false.
    bool HasMachoTBSSDirective = false;
  
    /// True if this is a non-GNU COFF target. The COFF port of the GNU linker
    /// doesn't handle associative comdats in the way that we would like to use
    /// them.
    bool HasCOFFAssociativeComdats = false;
  
    /// True if this is a non-GNU COFF target. For GNU targets, we don't generate
    /// constants into comdat sections.
    bool HasCOFFComdatConstants = false;
  
    /// True if this is an XCOFF target that supports visibility attributes as
    /// part of .global, .weak, .extern, and .comm. Default is false.
    bool HasVisibilityOnlyWithLinkage = false;
  
    /// This is the maximum possible length of an instruction, which is needed to
    /// compute the size of an inline asm.  Defaults to 4.
    unsigned MaxInstLength = 4;
  
    /// Every possible instruction length is a multiple of this value.  Factored
    /// out in .debug_frame and .debug_line.  Defaults to 1.
    unsigned MinInstAlignment = 1;
  
    /// The '$' token, when not referencing an identifier or constant, refers to
    /// the current PC.  Defaults to false.
    bool DollarIsPC = false;
  
    /// Allow '.' token, when not referencing an identifier or constant, to refer
    /// to the current PC. Defaults to true.
    bool DotIsPC = true;
  
    /// Whether the '*' token refers to the current PC. This is used for the
    /// HLASM dialect.
    bool StarIsPC = false;
  
    /// This string, if specified, is used to separate instructions from each
    /// other when on the same line.  Defaults to ';'
    const char *SeparatorString;
  
    /// This indicates the comment string used by the assembler.  Defaults to
    /// "#"
    StringRef CommentString;
  
    /// This indicates whether the comment string is only accepted as a comment
    /// at the beginning of statements. Defaults to false.
    bool RestrictCommentStringToStartOfStatement = false;
  
    /// This indicates whether to allow additional "comment strings" to be lexed
    /// as a comment. Setting this attribute to true, will ensure that C-style
    /// line comments (// ..), C-style block comments (/* .. */), and "#" are
    /// all treated as comments in addition to the string specified by the
    /// CommentString attribute.
    /// Default is true.
    bool AllowAdditionalComments = true;
  
    /// Should we emit the '\t' as the starting indentation marker for GNU inline
    /// asm statements. Defaults to true.
    bool EmitGNUAsmStartIndentationMarker = true;
  
    /// This is appended to emitted labels.  Defaults to ":"
    const char *LabelSuffix;
  
    /// Emit labels in purely upper case. Defaults to false.
    bool EmitLabelsInUpperCase = false;
  
    // Print the EH begin symbol with an assignment. Defaults to false.
    bool UseAssignmentForEHBegin = false;
  
    // Do we need to create a local symbol for .size?
    bool NeedsLocalForSize = false;
  
    /// This prefix is used for globals like constant pool entries that are
    /// completely private to the .s file and should not have names in the .o
    /// file.  Defaults to "L"
    StringRef PrivateGlobalPrefix;
  
    /// This prefix is used for labels for basic blocks. Defaults to the same as
    /// PrivateGlobalPrefix.
    StringRef PrivateLabelPrefix;
  
    /// This prefix is used for symbols that should be passed through the
    /// assembler but be removed by the linker.  This is 'l' on Darwin, currently
    /// used for some ObjC metadata.  The default of "" meast that for this system
    /// a plain private symbol should be used.  Defaults to "".
    StringRef LinkerPrivateGlobalPrefix;
  
    /// If these are nonempty, they contain a directive to emit before and after
    /// an inline assembly statement.  Defaults to "#APP\n", "#NO_APP\n"
    const char *InlineAsmStart;
    const char *InlineAsmEnd;
  
    /// These are assembly directives that tells the assembler to interpret the
    /// following instructions differently.  Defaults to ".code16", ".code32",
    /// ".code64".
    const char *Code16Directive;
    const char *Code32Directive;
    const char *Code64Directive;
  
    /// Which dialect of an assembler variant to use.  Defaults to 0
    unsigned AssemblerDialect = 0;
  
    /// This is true if the assembler allows @ characters in symbol names.
    /// Defaults to false.
    bool AllowAtInName = false;
  
    /// This is true if the assembler allows the "?" character at the start of
    /// of a string to be lexed as an AsmToken::Identifier.
    /// If the AsmLexer determines that the string can be lexed as a possible
    /// comment, setting this option will have no effect, and the string will
    /// still be lexed as a comment.
    bool AllowQuestionAtStartOfIdentifier = false;
  
    /// This is true if the assembler allows the "$" character at the start of
    /// of a string to be lexed as an AsmToken::Identifier.
    /// If the AsmLexer determines that the string can be lexed as a possible
    /// comment, setting this option will have no effect, and the string will
    /// still be lexed as a comment.
    bool AllowDollarAtStartOfIdentifier = false;
  
    /// This is true if the assembler allows the "@" character at the start of
    /// a string to be lexed as an AsmToken::Identifier.
    /// If the AsmLexer determines that the string can be lexed as a possible
    /// comment, setting this option will have no effect, and the string will
    /// still be lexed as a comment.
    bool AllowAtAtStartOfIdentifier = false;
  
    /// This is true if the assembler allows the "#" character at the start of
    /// a string to be lexed as an AsmToken::Identifier.
    /// If the AsmLexer determines that the string can be lexed as a possible
    /// comment, setting this option will have no effect, and the string will
    /// still be lexed as a comment.
    bool AllowHashAtStartOfIdentifier = false;
  
    /// If this is true, symbol names with invalid characters will be printed in
    /// quotes.
    bool SupportsQuotedNames = true;
  
    /// This is true if data region markers should be printed as
    /// ".data_region/.end_data_region" directives. If false, use "$d/$a" labels
    /// instead.
    bool UseDataRegionDirectives = false;
  
    /// True if .align is to be used for alignment. Only power-of-two
    /// alignment is supported.
    bool UseDotAlignForAlignment = false;
  
    /// True if the target supports LEB128 directives.
    bool HasLEB128Directives = true;
  
    //===--- Data Emission Directives -------------------------------------===//
  
    /// This should be set to the directive used to get some number of zero (and
    /// non-zero if supported by the directive) bytes emitted to the current
    /// section. Common cases are "\t.zero\t" and "\t.space\t". Defaults to
    /// "\t.zero\t"
    const char *ZeroDirective;
  
    /// This should be set to true if the zero directive supports a value to emit
    /// other than zero. If this is set to false, the Data*bitsDirective's will be
    /// used to emit these bytes. Defaults to true.
    bool ZeroDirectiveSupportsNonZeroValue = true;
  
    /// This directive allows emission of an ascii string with the standard C
    /// escape characters embedded into it.  If a target doesn't support this, it
    /// can be set to null. Defaults to "\t.ascii\t"
    const char *AsciiDirective;
  
    /// If not null, this allows for special handling of zero terminated strings
    /// on this target.  This is commonly supported as ".asciz".  If a target
    /// doesn't support this, it can be set to null.  Defaults to "\t.asciz\t"
    const char *AscizDirective;
  
    /// This directive accepts a comma-separated list of bytes for emission as a
    /// string of bytes.  For targets that do not support this, it shall be set to
    /// null.  Defaults to null.
    const char *ByteListDirective = nullptr;
  
    /// This directive allows emission of a zero-terminated ascii string without
    /// the standard C escape characters embedded into it.  If a target doesn't
    /// support this, it can be set to null. Defaults to null.
    const char *PlainStringDirective = nullptr;
  
    /// Form used for character literals in the assembly syntax.  Useful for
    /// producing strings as byte lists.  If a target does not use or support
    /// this, it shall be set to ACLS_Unknown.  Defaults to ACLS_Unknown.
    AsmCharLiteralSyntax CharacterLiteralSyntax = ACLS_Unknown;
  
    /// These directives are used to output some unit of integer data to the
    /// current section.  If a data directive is set to null, smaller data
    /// directives will be used to emit the large sizes.  Defaults to "\t.byte\t",
    /// "\t.short\t", "\t.long\t", "\t.quad\t"
    const char *Data8bitsDirective;
    const char *Data16bitsDirective;
    const char *Data32bitsDirective;
    const char *Data64bitsDirective;
  
    /// True if data directives support signed values
    bool SupportsSignedData = true;
  
    /// If non-null, a directive that is used to emit a word which should be
    /// relocated as a 64-bit GP-relative offset, e.g. .gpdword on Mips.  Defaults
    /// to nullptr.
    const char *GPRel64Directive = nullptr;
  
    /// If non-null, a directive that is used to emit a word which should be
    /// relocated as a 32-bit GP-relative offset, e.g. .gpword on Mips or .gprel32
    /// on Alpha.  Defaults to nullptr.
    const char *GPRel32Directive = nullptr;
  
    /// If non-null, directives that are used to emit a word/dword which should
    /// be relocated as a 32/64-bit DTP/TP-relative offset, e.g. .dtprelword/
    /// .dtpreldword/.tprelword/.tpreldword on Mips.
    const char *DTPRel32Directive = nullptr;
    const char *DTPRel64Directive = nullptr;
    const char *TPRel32Directive = nullptr;
    const char *TPRel64Directive = nullptr;
  
    /// This is true if this target uses "Sun Style" syntax for section switching
    /// ("#alloc,#write" etc) instead of the normal ELF syntax (,"a,w") in
    /// .section directives.  Defaults to false.
    bool SunStyleELFSectionSwitchSyntax = false;
  
    /// This is true if this target uses ELF '.section' directive before the
    /// '.bss' one. It's used for PPC/Linux which doesn't support the '.bss'
    /// directive only.  Defaults to false.
    bool UsesELFSectionDirectiveForBSS = false;
  
    bool NeedsDwarfSectionOffsetDirective = false;
  
    //===--- Alignment Information ----------------------------------------===//
  
    /// If this is true (the default) then the asmprinter emits ".align N"
    /// directives, where N is the number of bytes to align to.  Otherwise, it
    /// emits ".align log2(N)", e.g. 3 to align to an 8 byte boundary.  Defaults
    /// to true.
    bool AlignmentIsInBytes = true;
  
    /// If non-zero, this is used to fill the executable space created as the
    /// result of a alignment directive.  Defaults to 0
    unsigned TextAlignFillValue = 0;
  
    //===--- Global Variable Emission Directives --------------------------===//
  
    /// This is the directive used to declare a global entity. Defaults to
    /// ".globl".
    const char *GlobalDirective;
  
    /// True if the expression
    ///   .long f - g
    /// uses a relocation but it can be suppressed by writing
    ///   a = f - g
    ///   .long a
    bool SetDirectiveSuppressesReloc = false;
  
    /// False if the assembler requires that we use
    /// \code
    ///   Lc = a - b
    ///   .long Lc
    /// \endcode
    //
    /// instead of
    //
    /// \code
    ///   .long a - b
    /// \endcode
    ///
    ///  Defaults to true.
    bool HasAggressiveSymbolFolding = true;
  
    /// True is .comm's and .lcomms optional alignment is to be specified in bytes
    /// instead of log2(n).  Defaults to true.
    bool COMMDirectiveAlignmentIsInBytes = true;
  
    /// Describes if the .lcomm directive for the target supports an alignment
    /// argument and how it is interpreted.  Defaults to NoAlignment.
    LCOMM::LCOMMType LCOMMDirectiveAlignmentType = LCOMM::NoAlignment;
  
    /// True if the target only has basename for .file directive. False if the
    /// target also needs the directory along with the basename. Defaults to true.
    bool HasBasenameOnlyForFileDirective = true;
  
    /// True if the target represents string constants as mostly raw characters in
    /// paired double quotation with paired double quotation marks as the escape
    /// mechanism to represent a double quotation mark within the string. Defaults
    /// to false.
    bool HasPairedDoubleQuoteStringConstants = false;
  
    // True if the target allows .align directives on functions. This is true for
    // most targets, so defaults to true.
    bool HasFunctionAlignment = true;
  
    /// True if the target has .type and .size directives, this is true for most
    /// ELF targets.  Defaults to true.
    bool HasDotTypeDotSizeDirective = true;
  
    /// True if the target has a single parameter .file directive, this is true
    /// for ELF targets.  Defaults to true.
    bool HasSingleParameterDotFile = true;
  
    /// True if the target has a four strings .file directive, strings seperated
    /// by comma. Defaults to false.
    bool HasFourStringsDotFile = false;
  
    /// True if the target has a .ident directive, this is true for ELF targets.
    /// Defaults to false.
    bool HasIdentDirective = false;
  
    /// True if this target supports the MachO .no_dead_strip directive.  Defaults
    /// to false.
    bool HasNoDeadStrip = false;
  
    /// True if this target supports the MachO .alt_entry directive.  Defaults to
    /// false.
    bool HasAltEntry = false;
  
    /// Used to declare a global as being a weak symbol. Defaults to ".weak".
    const char *WeakDirective;
  
    /// This directive, if non-null, is used to declare a global as being a weak
    /// undefined symbol.  Defaults to nullptr.
    const char *WeakRefDirective = nullptr;
  
    /// True if we have a directive to declare a global as being a weak defined
    /// symbol.  Defaults to false.
    bool HasWeakDefDirective = false;
  
    /// True if we have a directive to declare a global as being a weak defined
    /// symbol that can be hidden (unexported).  Defaults to false.
    bool HasWeakDefCanBeHiddenDirective = false;
  
    /// True if we should mark symbols as global instead of weak, for
    /// weak*/linkonce*, if the symbol has a comdat.
    /// Defaults to false.
    bool AvoidWeakIfComdat = false;
  
    /// This attribute, if not MCSA_Invalid, is used to declare a symbol as having
    /// hidden visibility.  Defaults to MCSA_Hidden.
    MCSymbolAttr HiddenVisibilityAttr = MCSA_Hidden;
  
    /// This attribute, if not MCSA_Invalid, is used to declare an undefined
    /// symbol as having hidden visibility. Defaults to MCSA_Hidden.
    MCSymbolAttr HiddenDeclarationVisibilityAttr = MCSA_Hidden;
  
    /// This attribute, if not MCSA_Invalid, is used to declare a symbol as having
    /// protected visibility.  Defaults to MCSA_Protected
    MCSymbolAttr ProtectedVisibilityAttr = MCSA_Protected;
  
    //===--- Dwarf Emission Directives -----------------------------------===//
  
    /// True if target supports emission of debugging information.  Defaults to
    /// false.
    bool SupportsDebugInformation = false;
  
    /// Exception handling format for the target.  Defaults to None.
    ExceptionHandling ExceptionsType = ExceptionHandling::None;
  
    /// True if target uses CFI unwind information for debugging purpose when
    /// `ExceptionsType == ExceptionHandling::None`.
    bool UsesCFIForDebug = false;
  
    /// Windows exception handling data (.pdata) encoding.  Defaults to Invalid.
    WinEH::EncodingType WinEHEncodingType = WinEH::EncodingType::Invalid;
  
    /// True if Dwarf2 output generally uses relocations for references to other
    /// .debug_* sections.
    bool DwarfUsesRelocationsAcrossSections = true;
  
    /// True if DWARF FDE symbol reference relocations should be replaced by an
    /// absolute difference.
    bool DwarfFDESymbolsUseAbsDiff = false;
  
    /// True if the target supports generating the DWARF line table through using
    /// the .loc/.file directives. Defaults to true.
    bool UsesDwarfFileAndLocDirectives = true;
  
    /// True if the target needs the DWARF section length in the header (if any)
    /// of the DWARF section in the assembly file. Defaults to true.
    bool DwarfSectionSizeRequired = true;
  
    /// True if dwarf register numbers are printed instead of symbolic register
    /// names in .cfi_* directives.  Defaults to false.
    bool DwarfRegNumForCFI = false;
  
    /// True if target uses parens to indicate the symbol variant instead of @.
    /// For example, foo(plt) instead of foo@plt.  Defaults to false.
    bool UseParensForSymbolVariant = false;
  
    /// True if the target supports flags in ".loc" directive, false if only
    /// location is allowed.
    bool SupportsExtendedDwarfLocDirective = true;
  
    //===--- Prologue State ----------------------------------------------===//
  
    std::vector<MCCFIInstruction> InitialFrameState;
  
    //===--- Integrated Assembler Information ----------------------------===//
  
    // Generated object files can use all ELF features supported by GNU ld of
    // this binutils version and later. INT_MAX means all features can be used,
    // regardless of GNU ld support. The default value is referenced by
    // clang/Driver/Options.td.
    std::pair<int, int> BinutilsVersion = {2, 26};
  
    /// Should we use the integrated assembler?
    /// The integrated assembler should be enabled by default (by the
    /// constructors) when failing to parse a valid piece of assembly (inline
    /// or otherwise) is considered a bug. It may then be overridden after
    /// construction (see LLVMTargetMachine::initAsmInfo()).
    bool UseIntegratedAssembler;
  
    /// Use AsmParser to parse inlineAsm when UseIntegratedAssembler is not set.
    bool ParseInlineAsmUsingAsmParser;
  
    /// Preserve Comments in assembly
    bool PreserveAsmComments;
  
    /// Compress DWARF debug sections. Defaults to no compression.
    DebugCompressionType CompressDebugSections = DebugCompressionType::None;
  
    /// True if the integrated assembler should interpret 'a >> b' constant
    /// expressions as logical rather than arithmetic.
    bool UseLogicalShr = true;
  
    // If true, emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL, on
    // X86_64 ELF.
    bool RelaxELFRelocations = true;
  
    // If true, then the lexer and expression parser will support %neg(),
    // %hi(), and similar unary operators.
    bool HasMipsExpressions = false;
  
    // If true, use Motorola-style integers in Assembly (ex. $0ac).
    bool UseMotorolaIntegers = false;
  
    // If true, emit function descriptor symbol on AIX.
    bool NeedsFunctionDescriptors = false;
  
  public:
    explicit MCAsmInfo();
    virtual ~MCAsmInfo();
  
    /// Get the code pointer size in bytes.
    unsigned getCodePointerSize() const { return CodePointerSize; }
  
    /// Get the callee-saved register stack slot
    /// size in bytes.
    unsigned getCalleeSaveStackSlotSize() const {
      return CalleeSaveStackSlotSize;
    }
  
    /// True if the target is little endian.
    bool isLittleEndian() const { return IsLittleEndian; }
  
    /// True if target stack grow up.
    bool isStackGrowthDirectionUp() const { return StackGrowsUp; }
  
    bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; }
  
    // Data directive accessors.
  
    const char *getData8bitsDirective() const { return Data8bitsDirective; }
    const char *getData16bitsDirective() const { return Data16bitsDirective; }
    const char *getData32bitsDirective() const { return Data32bitsDirective; }
    const char *getData64bitsDirective() const { return Data64bitsDirective; }
    bool supportsSignedData() const { return SupportsSignedData; }
    const char *getGPRel64Directive() const { return GPRel64Directive; }
    const char *getGPRel32Directive() const { return GPRel32Directive; }
    const char *getDTPRel64Directive() const { return DTPRel64Directive; }
    const char *getDTPRel32Directive() const { return DTPRel32Directive; }
    const char *getTPRel64Directive() const { return TPRel64Directive; }
    const char *getTPRel32Directive() const { return TPRel32Directive; }
  
    /// Targets can implement this method to specify a section to switch to if the
    /// translation unit doesn't have any trampolines that require an executable
    /// stack.
    virtual MCSection *getNonexecutableStackSection(MCContext &Ctx) const {
      return nullptr;
    }
  
    /// True if the section is atomized using the symbols in it.
    /// This is false if the section is not atomized at all (most ELF sections) or
    /// if it is atomized based on its contents (MachO' __TEXT,__cstring for
    /// example).
    virtual bool isSectionAtomizableBySymbols(const MCSection &Section) const;
  
    virtual const MCExpr *getExprForPersonalitySymbol(const MCSymbol *Sym,
                                                      unsigned Encoding,
                                                      MCStreamer &Streamer) const;
  
    virtual const MCExpr *getExprForFDESymbol(const MCSymbol *Sym,
                                              unsigned Encoding,
                                              MCStreamer &Streamer) const;
  
    /// Return true if C is an acceptable character inside a symbol name.
    virtual bool isAcceptableChar(char C) const;
  
    /// Return true if the identifier \p Name does not need quotes to be
    /// syntactically correct.
    virtual bool isValidUnquotedName(StringRef Name) const;
  
    /// Return true if the .section directive should be omitted when
    /// emitting \p SectionName.  For example:
    ///
    /// shouldOmitSectionDirective(".text")
    ///
    /// returns false => .section .text,#alloc,#execinstr
    /// returns true  => .text
    virtual bool shouldOmitSectionDirective(StringRef SectionName) const;
  
    bool usesSunStyleELFSectionSwitchSyntax() const {
      return SunStyleELFSectionSwitchSyntax;
    }
  
    bool usesELFSectionDirectiveForBSS() const {
      return UsesELFSectionDirectiveForBSS;
    }
  
    bool needsDwarfSectionOffsetDirective() const {
      return NeedsDwarfSectionOffsetDirective;
    }
  
    // Accessors.
  
    bool hasMachoZeroFillDirective() const { return HasMachoZeroFillDirective; }
    bool hasMachoTBSSDirective() const { return HasMachoTBSSDirective; }
    bool hasCOFFAssociativeComdats() const { return HasCOFFAssociativeComdats; }
    bool hasCOFFComdatConstants() const { return HasCOFFComdatConstants; }
    bool hasVisibilityOnlyWithLinkage() const {
      return HasVisibilityOnlyWithLinkage;
    }
  
    /// Returns the maximum possible encoded instruction size in bytes. If \p STI
    /// is null, this should be the maximum size for any subtarget.
    virtual unsigned getMaxInstLength(const MCSubtargetInfo *STI = nullptr) const {
      return MaxInstLength;
    }
  
    unsigned getMinInstAlignment() const { return MinInstAlignment; }
    bool getDollarIsPC() const { return DollarIsPC; }
    bool getDotIsPC() const { return DotIsPC; }
    bool getStarIsPC() const { return StarIsPC; }
    const char *getSeparatorString() const { return SeparatorString; }
  
    /// This indicates the column (zero-based) at which asm comments should be
    /// printed.
    unsigned getCommentColumn() const { return 40; }
  
    StringRef getCommentString() const { return CommentString; }
    bool getRestrictCommentStringToStartOfStatement() const {
      return RestrictCommentStringToStartOfStatement;
    }
    bool shouldAllowAdditionalComments() const { return AllowAdditionalComments; }
    bool getEmitGNUAsmStartIndentationMarker() const {
      return EmitGNUAsmStartIndentationMarker;
    }
    const char *getLabelSuffix() const { return LabelSuffix; }
    bool shouldEmitLabelsInUpperCase() const { return EmitLabelsInUpperCase; }
  
    bool useAssignmentForEHBegin() const { return UseAssignmentForEHBegin; }
    bool needsLocalForSize() const { return NeedsLocalForSize; }
    StringRef getPrivateGlobalPrefix() const { return PrivateGlobalPrefix; }
    StringRef getPrivateLabelPrefix() const { return PrivateLabelPrefix; }
  
    bool hasLinkerPrivateGlobalPrefix() const {
      return !LinkerPrivateGlobalPrefix.empty();
    }
  
    StringRef getLinkerPrivateGlobalPrefix() const {
      if (hasLinkerPrivateGlobalPrefix())
        return LinkerPrivateGlobalPrefix;
      return getPrivateGlobalPrefix();
    }
  
    const char *getInlineAsmStart() const { return InlineAsmStart; }
    const char *getInlineAsmEnd() const { return InlineAsmEnd; }
    const char *getCode16Directive() const { return Code16Directive; }
    const char *getCode32Directive() const { return Code32Directive; }
    const char *getCode64Directive() const { return Code64Directive; }
    unsigned getAssemblerDialect() const { return AssemblerDialect; }
    bool doesAllowAtInName() const { return AllowAtInName; }
    bool doesAllowQuestionAtStartOfIdentifier() const {
      return AllowQuestionAtStartOfIdentifier;
    }
    bool doesAllowAtAtStartOfIdentifier() const {
      return AllowAtAtStartOfIdentifier;
    }
    bool doesAllowDollarAtStartOfIdentifier() const {
      return AllowDollarAtStartOfIdentifier;
    }
    bool doesAllowHashAtStartOfIdentifier() const {
      return AllowHashAtStartOfIdentifier;
    }
    bool supportsNameQuoting() const { return SupportsQuotedNames; }
  
    bool doesSupportDataRegionDirectives() const {
      return UseDataRegionDirectives;
    }
  
    bool useDotAlignForAlignment() const {
      return UseDotAlignForAlignment;
    }
  
    bool hasLEB128Directives() const { return HasLEB128Directives; }
  
    const char *getZeroDirective() const { return ZeroDirective; }
    bool doesZeroDirectiveSupportNonZeroValue() const {
      return ZeroDirectiveSupportsNonZeroValue;
    }
    const char *getAsciiDirective() const { return AsciiDirective; }
    const char *getAscizDirective() const { return AscizDirective; }
    const char *getByteListDirective() const { return ByteListDirective; }
    const char *getPlainStringDirective() const { return PlainStringDirective; }
    AsmCharLiteralSyntax characterLiteralSyntax() const {
      return CharacterLiteralSyntax;
    }
    bool getAlignmentIsInBytes() const { return AlignmentIsInBytes; }
    unsigned getTextAlignFillValue() const { return TextAlignFillValue; }
    const char *getGlobalDirective() const { return GlobalDirective; }
  
    bool doesSetDirectiveSuppressReloc() const {
      return SetDirectiveSuppressesReloc;
    }
  
    bool hasAggressiveSymbolFolding() const { return HasAggressiveSymbolFolding; }
  
    bool getCOMMDirectiveAlignmentIsInBytes() const {
      return COMMDirectiveAlignmentIsInBytes;
    }
  
    LCOMM::LCOMMType getLCOMMDirectiveAlignmentType() const {
      return LCOMMDirectiveAlignmentType;
    }
  
    bool hasBasenameOnlyForFileDirective() const {
      return HasBasenameOnlyForFileDirective;
    }
    bool hasPairedDoubleQuoteStringConstants() const {
      return HasPairedDoubleQuoteStringConstants;
    }
    bool hasFunctionAlignment() const { return HasFunctionAlignment; }
    bool hasDotTypeDotSizeDirective() const { return HasDotTypeDotSizeDirective; }
    bool hasSingleParameterDotFile() const { return HasSingleParameterDotFile; }
    bool hasFourStringsDotFile() const { return HasFourStringsDotFile; }
    bool hasIdentDirective() const { return HasIdentDirective; }
    bool hasNoDeadStrip() const { return HasNoDeadStrip; }
    bool hasAltEntry() const { return HasAltEntry; }
    const char *getWeakDirective() const { return WeakDirective; }
    const char *getWeakRefDirective() const { return WeakRefDirective; }
    bool hasWeakDefDirective() const { return HasWeakDefDirective; }
  
    bool hasWeakDefCanBeHiddenDirective() const {
      return HasWeakDefCanBeHiddenDirective;
    }
  
    bool avoidWeakIfComdat() const { return AvoidWeakIfComdat; }
  
    MCSymbolAttr getHiddenVisibilityAttr() const { return HiddenVisibilityAttr; }
  
    MCSymbolAttr getHiddenDeclarationVisibilityAttr() const {
      return HiddenDeclarationVisibilityAttr;
    }
  
    MCSymbolAttr getProtectedVisibilityAttr() const {
      return ProtectedVisibilityAttr;
    }
  
    bool doesSupportDebugInformation() const { return SupportsDebugInformation; }
  
    ExceptionHandling getExceptionHandlingType() const { return ExceptionsType; }
    WinEH::EncodingType getWinEHEncodingType() const { return WinEHEncodingType; }
  
    void setExceptionsType(ExceptionHandling EH) {
      ExceptionsType = EH;
    }
  
    bool doesUseCFIForDebug() const { return UsesCFIForDebug; }
  
    /// Returns true if the exception handling method for the platform uses call
    /// frame information to unwind.
    bool usesCFIForEH() const {
      return (ExceptionsType == ExceptionHandling::DwarfCFI ||
              ExceptionsType == ExceptionHandling::ARM || usesWindowsCFI());
    }
  
    bool usesWindowsCFI() const {
      return ExceptionsType == ExceptionHandling::WinEH &&
             (WinEHEncodingType != WinEH::EncodingType::Invalid &&
              WinEHEncodingType != WinEH::EncodingType::X86);
    }
  
    bool doesDwarfUseRelocationsAcrossSections() const {
      return DwarfUsesRelocationsAcrossSections;
    }
  
    bool doDwarfFDESymbolsUseAbsDiff() const { return DwarfFDESymbolsUseAbsDiff; }
    bool useDwarfRegNumForCFI() const { return DwarfRegNumForCFI; }
    bool useParensForSymbolVariant() const { return UseParensForSymbolVariant; }
    bool supportsExtendedDwarfLocDirective() const {
      return SupportsExtendedDwarfLocDirective;
    }
  
    bool usesDwarfFileAndLocDirectives() const {
      return UsesDwarfFileAndLocDirectives;
    }
  
    bool needsDwarfSectionSizeInHeader() const {
      return DwarfSectionSizeRequired;
    }
  
    void addInitialFrameState(const MCCFIInstruction &Inst);
  
    const std::vector<MCCFIInstruction> &getInitialFrameState() const {
      return InitialFrameState;
    }
  
    void setBinutilsVersion(std::pair<int, int> Value) {
      BinutilsVersion = Value;
    }
  
    /// Return true if assembly (inline or otherwise) should be parsed.
    bool useIntegratedAssembler() const { return UseIntegratedAssembler; }
  
    /// Return true if target want to use AsmParser to parse inlineasm.
    bool parseInlineAsmUsingAsmParser() const {
      return ParseInlineAsmUsingAsmParser;
    }
  
    bool binutilsIsAtLeast(int Major, int Minor) const {
      return BinutilsVersion >= std::make_pair(Major, Minor);
    }
  
    /// Set whether assembly (inline or otherwise) should be parsed.
    virtual void setUseIntegratedAssembler(bool Value) {
      UseIntegratedAssembler = Value;
    }
  
    /// Set whether target want to use AsmParser to parse inlineasm.
    virtual void setParseInlineAsmUsingAsmParser(bool Value) {
      ParseInlineAsmUsingAsmParser = Value;
    }
  
    /// Return true if assembly (inline or otherwise) should be parsed.
    bool preserveAsmComments() const { return PreserveAsmComments; }
  
    /// Set whether assembly (inline or otherwise) should be parsed.
    virtual void setPreserveAsmComments(bool Value) {
      PreserveAsmComments = Value;
    }
  
    DebugCompressionType compressDebugSections() const {
      return CompressDebugSections;
    }
  
    void setCompressDebugSections(DebugCompressionType CompressDebugSections) {
      this->CompressDebugSections = CompressDebugSections;
    }
  
    bool shouldUseLogicalShr() const { return UseLogicalShr; }
  
    bool canRelaxRelocations() const { return RelaxELFRelocations; }
    void setRelaxELFRelocations(bool V) { RelaxELFRelocations = V; }
    bool hasMipsExpressions() const { return HasMipsExpressions; }
    bool needsFunctionDescriptors() const { return NeedsFunctionDescriptors; }
    bool shouldUseMotorolaIntegers() const { return UseMotorolaIntegers; }
  };
  
  } // end namespace llvm
  
  #endif // LLVM_MC_MCASMINFO_H
  