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      1 //===-- llvm/MC/MCAsmInfo.h - Asm info --------------------------*- C++ -*-===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 //
     10 // This file contains a class to be used as the basis for target specific
     11 // asm writers.  This class primarily takes care of global printing constants,
     12 // which are used in very similar ways across all targets.
     13 //
     14 //===----------------------------------------------------------------------===//
     15 
     16 #ifndef LLVM_TARGET_ASM_INFO_H
     17 #define LLVM_TARGET_ASM_INFO_H
     18 
     19 #include "llvm/MC/MachineLocation.h"
     20 #include "llvm/MC/MCDirectives.h"
     21 #include <cassert>
     22 #include <vector>
     23 
     24 namespace llvm {
     25   class MCExpr;
     26   class MCSection;
     27   class MCStreamer;
     28   class MCSymbol;
     29   class MCContext;
     30 
     31   namespace ExceptionHandling {
     32     enum ExceptionsType { None, DwarfCFI, SjLj, ARM, Win64 };
     33   }
     34 
     35   namespace LCOMM {
     36     enum LCOMMType { None, NoAlignment, ByteAlignment };
     37   }
     38 
     39   namespace Structors {
     40     enum OutputOrder { None, PriorityOrder, ReversePriorityOrder };
     41   }
     42 
     43   /// MCAsmInfo - This class is intended to be used as a base class for asm
     44   /// properties and features specific to the target.
     45   class MCAsmInfo {
     46   protected:
     47     //===------------------------------------------------------------------===//
     48     // Properties to be set by the target writer, used to configure asm printer.
     49     //
     50 
     51     /// PointerSize - Pointer size in bytes.
     52     ///               Default is 4.
     53     unsigned PointerSize;
     54 
     55     /// IsLittleEndian - True if target is little endian.
     56     ///                  Default is true.
     57     bool IsLittleEndian;
     58 
     59     /// StackGrowsUp - True if target stack grow up.
     60     ///                Default is false.
     61     bool StackGrowsUp;
     62 
     63     /// HasSubsectionsViaSymbols - True if this target has the MachO
     64     /// .subsections_via_symbols directive.
     65     bool HasSubsectionsViaSymbols;           // Default is false.
     66 
     67     /// HasMachoZeroFillDirective - True if this is a MachO target that supports
     68     /// the macho-specific .zerofill directive for emitting BSS Symbols.
     69     bool HasMachoZeroFillDirective;               // Default is false.
     70 
     71     /// HasMachoTBSSDirective - True if this is a MachO target that supports
     72     /// the macho-specific .tbss directive for emitting thread local BSS Symbols
     73     bool HasMachoTBSSDirective;                 // Default is false.
     74 
     75     /// StructorOutputOrder - Whether the static ctor/dtor list should be output
     76     /// in no particular order, in order of increasing priority or the reverse:
     77     /// in order of decreasing priority (the default).
     78     Structors::OutputOrder StructorOutputOrder; // Default is reverse order.
     79 
     80     /// HasStaticCtorDtorReferenceInStaticMode - True if the compiler should
     81     /// emit a ".reference .constructors_used" or ".reference .destructors_used"
     82     /// directive after the a static ctor/dtor list.  This directive is only
     83     /// emitted in Static relocation model.
     84     bool HasStaticCtorDtorReferenceInStaticMode;  // Default is false.
     85 
     86     /// LinkerRequiresNonEmptyDwarfLines - True if the linker has a bug and
     87     /// requires that the debug_line section be of a minimum size. In practice
     88     /// such a linker requires a non empty line sequence if a file is present.
     89     bool LinkerRequiresNonEmptyDwarfLines; // Default to false.
     90 
     91     /// MaxInstLength - This is the maximum possible length of an instruction,
     92     /// which is needed to compute the size of an inline asm.
     93     unsigned MaxInstLength;                  // Defaults to 4.
     94 
     95     /// PCSymbol - The symbol used to represent the current PC.  Used in PC
     96     /// relative expressions.
     97     const char *PCSymbol;                    // Defaults to "$".
     98 
     99     /// SeparatorString - This string, if specified, is used to separate
    100     /// instructions from each other when on the same line.
    101     const char *SeparatorString;             // Defaults to ';'
    102 
    103     /// CommentColumn - This indicates the comment num (zero-based) at
    104     /// which asm comments should be printed.
    105     unsigned CommentColumn;                  // Defaults to 40
    106 
    107     /// CommentString - This indicates the comment character used by the
    108     /// assembler.
    109     const char *CommentString;               // Defaults to "#"
    110 
    111     /// LabelSuffix - This is appended to emitted labels.
    112     const char *LabelSuffix;                 // Defaults to ":"
    113 
    114     /// GlobalPrefix - If this is set to a non-empty string, it is prepended
    115     /// onto all global symbols.  This is often used for "_" or ".".
    116     const char *GlobalPrefix;                // Defaults to ""
    117 
    118     /// PrivateGlobalPrefix - This prefix is used for globals like constant
    119     /// pool entries that are completely private to the .s file and should not
    120     /// have names in the .o file.  This is often "." or "L".
    121     const char *PrivateGlobalPrefix;         // Defaults to "."
    122 
    123     /// LinkerPrivateGlobalPrefix - This prefix is used for symbols that should
    124     /// be passed through the assembler but be removed by the linker.  This
    125     /// is "l" on Darwin, currently used for some ObjC metadata.
    126     const char *LinkerPrivateGlobalPrefix;   // Defaults to ""
    127 
    128     /// InlineAsmStart/End - If these are nonempty, they contain a directive to
    129     /// emit before and after an inline assembly statement.
    130     const char *InlineAsmStart;              // Defaults to "#APP\n"
    131     const char *InlineAsmEnd;                // Defaults to "#NO_APP\n"
    132 
    133     /// Code16Directive, Code32Directive, Code64Directive - These are assembly
    134     /// directives that tells the assembler to interpret the following
    135     /// instructions differently.
    136     const char *Code16Directive;             // Defaults to ".code16"
    137     const char *Code32Directive;             // Defaults to ".code32"
    138     const char *Code64Directive;             // Defaults to ".code64"
    139 
    140     /// AssemblerDialect - Which dialect of an assembler variant to use.
    141     unsigned AssemblerDialect;               // Defaults to 0
    142 
    143     /// AllowQuotesInName - This is true if the assembler allows for complex
    144     /// symbol names to be surrounded in quotes.  This defaults to false.
    145     bool AllowQuotesInName;
    146 
    147     /// AllowNameToStartWithDigit - This is true if the assembler allows symbol
    148     /// names to start with a digit (e.g., "0x0021").  This defaults to false.
    149     bool AllowNameToStartWithDigit;
    150 
    151     /// AllowPeriodsInName - This is true if the assembler allows periods in
    152     /// symbol names.  This defaults to true.
    153     bool AllowPeriodsInName;
    154 
    155     //===--- Data Emission Directives -------------------------------------===//
    156 
    157     /// ZeroDirective - this should be set to the directive used to get some
    158     /// number of zero bytes emitted to the current section.  Common cases are
    159     /// "\t.zero\t" and "\t.space\t".  If this is set to null, the
    160     /// Data*bitsDirective's will be used to emit zero bytes.
    161     const char *ZeroDirective;               // Defaults to "\t.zero\t"
    162 
    163     /// AsciiDirective - This directive allows emission of an ascii string with
    164     /// the standard C escape characters embedded into it.
    165     const char *AsciiDirective;              // Defaults to "\t.ascii\t"
    166 
    167     /// AscizDirective - If not null, this allows for special handling of
    168     /// zero terminated strings on this target.  This is commonly supported as
    169     /// ".asciz".  If a target doesn't support this, it can be set to null.
    170     const char *AscizDirective;              // Defaults to "\t.asciz\t"
    171 
    172     /// DataDirectives - These directives are used to output some unit of
    173     /// integer data to the current section.  If a data directive is set to
    174     /// null, smaller data directives will be used to emit the large sizes.
    175     const char *Data8bitsDirective;          // Defaults to "\t.byte\t"
    176     const char *Data16bitsDirective;         // Defaults to "\t.short\t"
    177     const char *Data32bitsDirective;         // Defaults to "\t.long\t"
    178     const char *Data64bitsDirective;         // Defaults to "\t.quad\t"
    179 
    180     /// [Data|Code]Begin - These magic labels are used to marked a region as
    181     /// data or code, and are used to provide additional information for
    182     /// correct disassembly on targets that like to mix data and code within
    183     /// a segment.  These labels will be implicitly suffixed by the streamer
    184     /// to give them unique names.
    185     const char *DataBegin;                   // Defaults to "$d."
    186     const char *CodeBegin;                   // Defaults to "$a."
    187     const char *JT8Begin;                    // Defaults to "$a."
    188     const char *JT16Begin;                   // Defaults to "$a."
    189     const char *JT32Begin;                   // Defaults to "$a."
    190     bool SupportsDataRegions;
    191 
    192     /// GPRel32Directive - if non-null, a directive that is used to emit a word
    193     /// which should be relocated as a 32-bit GP-relative offset, e.g. .gpword
    194     /// on Mips or .gprel32 on Alpha.
    195     const char *GPRel32Directive;            // Defaults to NULL.
    196 
    197     /// getDataASDirective - Return the directive that should be used to emit
    198     /// data of the specified size to the specified numeric address space.
    199     virtual const char *getDataASDirective(unsigned Size, unsigned AS) const {
    200       assert(AS != 0 && "Don't know the directives for default addr space");
    201       return 0;
    202     }
    203 
    204     /// SunStyleELFSectionSwitchSyntax - This is true if this target uses "Sun
    205     /// Style" syntax for section switching ("#alloc,#write" etc) instead of the
    206     /// normal ELF syntax (,"a,w") in .section directives.
    207     bool SunStyleELFSectionSwitchSyntax;     // Defaults to false.
    208 
    209     /// UsesELFSectionDirectiveForBSS - This is true if this target uses ELF
    210     /// '.section' directive before the '.bss' one. It's used for PPC/Linux
    211     /// which doesn't support the '.bss' directive only.
    212     bool UsesELFSectionDirectiveForBSS;      // Defaults to false.
    213 
    214     /// HasMicrosoftFastStdCallMangling - True if this target uses microsoft
    215     /// style mangling for functions with X86_StdCall/X86_FastCall calling
    216     /// convention.
    217     bool HasMicrosoftFastStdCallMangling;    // Defaults to false.
    218 
    219     //===--- Alignment Information ----------------------------------------===//
    220 
    221     /// AlignDirective - The directive used to emit round up to an alignment
    222     /// boundary.
    223     ///
    224     const char *AlignDirective;              // Defaults to "\t.align\t"
    225 
    226     /// AlignmentIsInBytes - If this is true (the default) then the asmprinter
    227     /// emits ".align N" directives, where N is the number of bytes to align to.
    228     /// Otherwise, it emits ".align log2(N)", e.g. 3 to align to an 8 byte
    229     /// boundary.
    230     bool AlignmentIsInBytes;                 // Defaults to true
    231 
    232     /// TextAlignFillValue - If non-zero, this is used to fill the executable
    233     /// space created as the result of a alignment directive.
    234     unsigned TextAlignFillValue;             // Defaults to 0
    235 
    236     //===--- Global Variable Emission Directives --------------------------===//
    237 
    238     /// GlobalDirective - This is the directive used to declare a global entity.
    239     ///
    240     const char *GlobalDirective;             // Defaults to NULL.
    241 
    242     /// ExternDirective - This is the directive used to declare external
    243     /// globals.
    244     ///
    245     const char *ExternDirective;             // Defaults to NULL.
    246 
    247     /// HasSetDirective - True if the assembler supports the .set directive.
    248     bool HasSetDirective;                    // Defaults to true.
    249 
    250     /// HasAggressiveSymbolFolding - False if the assembler requires that we use
    251     /// Lc = a - b
    252     /// .long Lc
    253     /// instead of
    254     /// .long a - b
    255     bool HasAggressiveSymbolFolding;           // Defaults to true.
    256 
    257     /// LCOMMDirectiveType - Describes if the target supports the .lcomm
    258     /// directive and whether it has an alignment parameter.
    259     LCOMM::LCOMMType LCOMMDirectiveType;     // Defaults to LCOMM::None.
    260 
    261     /// COMMDirectiveAlignmentIsInBytes - True is COMMDirective's optional
    262     /// alignment is to be specified in bytes instead of log2(n).
    263     bool COMMDirectiveAlignmentIsInBytes;    // Defaults to true;
    264 
    265     /// HasDotTypeDotSizeDirective - True if the target has .type and .size
    266     /// directives, this is true for most ELF targets.
    267     bool HasDotTypeDotSizeDirective;         // Defaults to true.
    268 
    269     /// HasSingleParameterDotFile - True if the target has a single parameter
    270     /// .file directive, this is true for ELF targets.
    271     bool HasSingleParameterDotFile;          // Defaults to true.
    272 
    273     /// HasNoDeadStrip - True if this target supports the MachO .no_dead_strip
    274     /// directive.
    275     bool HasNoDeadStrip;                     // Defaults to false.
    276 
    277     /// HasSymbolResolver - True if this target supports the MachO
    278     /// .symbol_resolver directive.
    279     bool HasSymbolResolver;                     // Defaults to false.
    280 
    281     /// WeakRefDirective - This directive, if non-null, is used to declare a
    282     /// global as being a weak undefined symbol.
    283     const char *WeakRefDirective;            // Defaults to NULL.
    284 
    285     /// WeakDefDirective - This directive, if non-null, is used to declare a
    286     /// global as being a weak defined symbol.
    287     const char *WeakDefDirective;            // Defaults to NULL.
    288 
    289     /// LinkOnceDirective - This directive, if non-null is used to declare a
    290     /// global as being a weak defined symbol.  This is used on cygwin/mingw.
    291     const char *LinkOnceDirective;           // Defaults to NULL.
    292 
    293     /// HiddenVisibilityAttr - This attribute, if not MCSA_Invalid, is used to
    294     /// declare a symbol as having hidden visibility.
    295     MCSymbolAttr HiddenVisibilityAttr;       // Defaults to MCSA_Hidden.
    296 
    297     /// HiddenDeclarationVisibilityAttr - This attribute, if not MCSA_Invalid,
    298     /// is used to declare an undefined symbol as having hidden visibility.
    299     MCSymbolAttr HiddenDeclarationVisibilityAttr;   // Defaults to MCSA_Hidden.
    300 
    301 
    302     /// ProtectedVisibilityAttr - This attribute, if not MCSA_Invalid, is used
    303     /// to declare a symbol as having protected visibility.
    304     MCSymbolAttr ProtectedVisibilityAttr;    // Defaults to MCSA_Protected
    305 
    306     //===--- Dwarf Emission Directives -----------------------------------===//
    307 
    308     /// HasLEB128 - True if target asm supports leb128 directives.
    309     bool HasLEB128;                          // Defaults to false.
    310 
    311     /// SupportsDebugInformation - True if target supports emission of debugging
    312     /// information.
    313     bool SupportsDebugInformation;           // Defaults to false.
    314 
    315     /// SupportsExceptionHandling - True if target supports exception handling.
    316     ExceptionHandling::ExceptionsType ExceptionsType; // Defaults to None
    317 
    318     /// DwarfUsesInlineInfoSection - True if DwarfDebugInlineSection is used to
    319     /// encode inline subroutine information.
    320     bool DwarfUsesInlineInfoSection;         // Defaults to false.
    321 
    322     /// DwarfSectionOffsetDirective - Special section offset directive.
    323     const char* DwarfSectionOffsetDirective; // Defaults to NULL
    324 
    325     /// DwarfRequiresRelocationForSectionOffset - True if we need to produce a
    326     // relocation when we want a section offset in dwarf.
    327     bool DwarfRequiresRelocationForSectionOffset;  // Defaults to true;
    328 
    329     // DwarfUsesLabelOffsetDifference - True if Dwarf2 output can
    330     // use EmitLabelOffsetDifference.
    331     bool DwarfUsesLabelOffsetForRanges;
    332 
    333     /// DwarfRegNumForCFI - True if dwarf register numbers are printed
    334     /// instead of symbolic register names in .cfi_* directives.
    335     bool DwarfRegNumForCFI;  // Defaults to false;
    336 
    337     //===--- CBE Asm Translation Table -----------------------------------===//
    338 
    339     const char *const *AsmTransCBE;          // Defaults to empty
    340 
    341     //===--- Prologue State ----------------------------------------------===//
    342 
    343     std::vector<MachineMove> InitialFrameState;
    344 
    345   public:
    346     explicit MCAsmInfo();
    347     virtual ~MCAsmInfo();
    348 
    349     // FIXME: move these methods to DwarfPrinter when the JIT stops using them.
    350     static unsigned getSLEB128Size(int Value);
    351     static unsigned getULEB128Size(unsigned Value);
    352 
    353     /// getPointerSize - Get the pointer size in bytes.
    354     unsigned getPointerSize() const {
    355       return PointerSize;
    356     }
    357 
    358     /// islittleendian - True if the target is little endian.
    359     bool isLittleEndian() const {
    360       return IsLittleEndian;
    361     }
    362 
    363     /// isStackGrowthDirectionUp - True if target stack grow up.
    364     bool isStackGrowthDirectionUp() const {
    365       return StackGrowsUp;
    366     }
    367 
    368     bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; }
    369 
    370     // Data directive accessors.
    371     //
    372     const char *getData8bitsDirective(unsigned AS = 0) const {
    373       return AS == 0 ? Data8bitsDirective : getDataASDirective(8, AS);
    374     }
    375     const char *getData16bitsDirective(unsigned AS = 0) const {
    376       return AS == 0 ? Data16bitsDirective : getDataASDirective(16, AS);
    377     }
    378     const char *getData32bitsDirective(unsigned AS = 0) const {
    379       return AS == 0 ? Data32bitsDirective : getDataASDirective(32, AS);
    380     }
    381     const char *getData64bitsDirective(unsigned AS = 0) const {
    382       return AS == 0 ? Data64bitsDirective : getDataASDirective(64, AS);
    383     }
    384     const char *getGPRel32Directive() const { return GPRel32Directive; }
    385 
    386     /// [Code|Data]Begin label name accessors.
    387     const char *getCodeBeginLabelName() const { return CodeBegin; }
    388     const char *getDataBeginLabelName() const { return DataBegin; }
    389     const char *getJumpTable8BeginLabelName() const { return JT8Begin; }
    390     const char *getJumpTable16BeginLabelName() const { return JT16Begin; }
    391     const char *getJumpTable32BeginLabelName() const { return JT32Begin; }
    392     bool getSupportsDataRegions() const { return SupportsDataRegions; }
    393 
    394     /// getNonexecutableStackSection - Targets can implement this method to
    395     /// specify a section to switch to if the translation unit doesn't have any
    396     /// trampolines that require an executable stack.
    397     virtual const MCSection *getNonexecutableStackSection(MCContext &Ctx) const{
    398       return 0;
    399     }
    400 
    401     virtual const MCExpr *
    402     getExprForPersonalitySymbol(const MCSymbol *Sym,
    403                                 unsigned Encoding,
    404                                 MCStreamer &Streamer) const;
    405 
    406     const MCExpr *
    407     getExprForFDESymbol(const MCSymbol *Sym,
    408                         unsigned Encoding,
    409                         MCStreamer &Streamer) const;
    410 
    411     bool usesSunStyleELFSectionSwitchSyntax() const {
    412       return SunStyleELFSectionSwitchSyntax;
    413     }
    414 
    415     bool usesELFSectionDirectiveForBSS() const {
    416       return UsesELFSectionDirectiveForBSS;
    417     }
    418 
    419     bool hasMicrosoftFastStdCallMangling() const {
    420       return HasMicrosoftFastStdCallMangling;
    421     }
    422 
    423     // Accessors.
    424     //
    425     bool hasMachoZeroFillDirective() const { return HasMachoZeroFillDirective; }
    426     bool hasMachoTBSSDirective() const { return HasMachoTBSSDirective; }
    427     Structors::OutputOrder getStructorOutputOrder() const {
    428       return StructorOutputOrder;
    429     }
    430     bool hasStaticCtorDtorReferenceInStaticMode() const {
    431       return HasStaticCtorDtorReferenceInStaticMode;
    432     }
    433     bool getLinkerRequiresNonEmptyDwarfLines() const {
    434       return LinkerRequiresNonEmptyDwarfLines;
    435     }
    436     unsigned getMaxInstLength() const {
    437       return MaxInstLength;
    438     }
    439     const char *getPCSymbol() const {
    440       return PCSymbol;
    441     }
    442     const char *getSeparatorString() const {
    443       return SeparatorString;
    444     }
    445     unsigned getCommentColumn() const {
    446       return CommentColumn;
    447     }
    448     const char *getCommentString() const {
    449       return CommentString;
    450     }
    451     const char *getLabelSuffix() const {
    452       return LabelSuffix;
    453     }
    454     const char *getGlobalPrefix() const {
    455       return GlobalPrefix;
    456     }
    457     const char *getPrivateGlobalPrefix() const {
    458       return PrivateGlobalPrefix;
    459     }
    460     const char *getLinkerPrivateGlobalPrefix() const {
    461       return LinkerPrivateGlobalPrefix;
    462     }
    463     const char *getInlineAsmStart() const {
    464       return InlineAsmStart;
    465     }
    466     const char *getInlineAsmEnd() const {
    467       return InlineAsmEnd;
    468     }
    469     const char *getCode16Directive() const {
    470       return Code16Directive;
    471     }
    472     const char *getCode32Directive() const {
    473       return Code32Directive;
    474     }
    475     const char *getCode64Directive() const {
    476       return Code64Directive;
    477     }
    478     unsigned getAssemblerDialect() const {
    479       return AssemblerDialect;
    480     }
    481     bool doesAllowQuotesInName() const {
    482       return AllowQuotesInName;
    483     }
    484     bool doesAllowNameToStartWithDigit() const {
    485       return AllowNameToStartWithDigit;
    486     }
    487     bool doesAllowPeriodsInName() const {
    488       return AllowPeriodsInName;
    489     }
    490     const char *getZeroDirective() const {
    491       return ZeroDirective;
    492     }
    493     const char *getAsciiDirective() const {
    494       return AsciiDirective;
    495     }
    496     const char *getAscizDirective() const {
    497       return AscizDirective;
    498     }
    499     const char *getAlignDirective() const {
    500       return AlignDirective;
    501     }
    502     bool getAlignmentIsInBytes() const {
    503       return AlignmentIsInBytes;
    504     }
    505     unsigned getTextAlignFillValue() const {
    506       return TextAlignFillValue;
    507     }
    508     const char *getGlobalDirective() const {
    509       return GlobalDirective;
    510     }
    511     const char *getExternDirective() const {
    512       return ExternDirective;
    513     }
    514     bool hasSetDirective() const { return HasSetDirective; }
    515     bool hasAggressiveSymbolFolding() const {
    516       return HasAggressiveSymbolFolding;
    517     }
    518     LCOMM::LCOMMType getLCOMMDirectiveType() const {
    519       return LCOMMDirectiveType;
    520     }
    521     bool hasDotTypeDotSizeDirective() const {return HasDotTypeDotSizeDirective;}
    522     bool getCOMMDirectiveAlignmentIsInBytes() const {
    523       return COMMDirectiveAlignmentIsInBytes;
    524     }
    525     bool hasSingleParameterDotFile() const { return HasSingleParameterDotFile; }
    526     bool hasNoDeadStrip() const { return HasNoDeadStrip; }
    527     bool hasSymbolResolver() const { return HasSymbolResolver; }
    528     const char *getWeakRefDirective() const { return WeakRefDirective; }
    529     const char *getWeakDefDirective() const { return WeakDefDirective; }
    530     const char *getLinkOnceDirective() const { return LinkOnceDirective; }
    531 
    532     MCSymbolAttr getHiddenVisibilityAttr() const { return HiddenVisibilityAttr;}
    533     MCSymbolAttr getHiddenDeclarationVisibilityAttr() const {
    534       return HiddenDeclarationVisibilityAttr;
    535     }
    536     MCSymbolAttr getProtectedVisibilityAttr() const {
    537       return ProtectedVisibilityAttr;
    538     }
    539     bool hasLEB128() const {
    540       return HasLEB128;
    541     }
    542     bool doesSupportDebugInformation() const {
    543       return SupportsDebugInformation;
    544     }
    545     bool doesSupportExceptionHandling() const {
    546       return ExceptionsType != ExceptionHandling::None;
    547     }
    548     ExceptionHandling::ExceptionsType getExceptionHandlingType() const {
    549       return ExceptionsType;
    550     }
    551     bool isExceptionHandlingDwarf() const {
    552       return
    553         (ExceptionsType == ExceptionHandling::DwarfCFI ||
    554          ExceptionsType == ExceptionHandling::ARM ||
    555          ExceptionsType == ExceptionHandling::Win64);
    556     }
    557     bool doesDwarfUsesInlineInfoSection() const {
    558       return DwarfUsesInlineInfoSection;
    559     }
    560     const char *getDwarfSectionOffsetDirective() const {
    561       return DwarfSectionOffsetDirective;
    562     }
    563     bool doesDwarfRequireRelocationForSectionOffset() const {
    564       return DwarfRequiresRelocationForSectionOffset;
    565     }
    566     bool doesDwarfUsesLabelOffsetForRanges() const {
    567       return DwarfUsesLabelOffsetForRanges;
    568     }
    569     bool useDwarfRegNumForCFI() const {
    570       return DwarfRegNumForCFI;
    571     }
    572     const char *const *getAsmCBE() const {
    573       return AsmTransCBE;
    574     }
    575 
    576     void addInitialFrameState(MCSymbol *label, const MachineLocation &D,
    577                               const MachineLocation &S) {
    578       InitialFrameState.push_back(MachineMove(label, D, S));
    579     }
    580     const std::vector<MachineMove> &getInitialFrameState() const {
    581       return InitialFrameState;
    582     }
    583   };
    584 }
    585 
    586 #endif
    587