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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_MC_MCASMINFO_H
     17 #define LLVM_MC_MCASMINFO_H
     18 
     19 #include "llvm/MC/MCDirectives.h"
     20 #include "llvm/MC/MCDwarf.h"
     21 #include "llvm/MC/MachineLocation.h"
     22 #include <cassert>
     23 #include <vector>
     24 
     25 namespace llvm {
     26   class MCExpr;
     27   class MCSection;
     28   class MCStreamer;
     29   class MCSymbol;
     30   class MCContext;
     31 
     32   namespace ExceptionHandling {
     33     enum ExceptionsType { None, DwarfCFI, SjLj, ARM, Win64 };
     34   }
     35 
     36   namespace LCOMM {
     37     enum LCOMMType { NoAlignment, ByteAlignment, Log2Alignment };
     38   }
     39 
     40   /// MCAsmInfo - This class is intended to be used as a base class for asm
     41   /// properties and features specific to the target.
     42   class MCAsmInfo {
     43   protected:
     44     //===------------------------------------------------------------------===//
     45     // Properties to be set by the target writer, used to configure asm printer.
     46     //
     47 
     48     /// PointerSize - Pointer size in bytes.
     49     ///               Default is 4.
     50     unsigned PointerSize;
     51 
     52     /// CalleeSaveStackSlotSize - Size of the stack slot reserved for
     53     ///                           callee-saved registers, in bytes.
     54     ///                           Default is same as pointer size.
     55     unsigned CalleeSaveStackSlotSize;
     56 
     57     /// IsLittleEndian - True if target is little endian.
     58     ///                  Default is true.
     59     bool IsLittleEndian;
     60 
     61     /// StackGrowsUp - True if target stack grow up.
     62     ///                Default is false.
     63     bool StackGrowsUp;
     64 
     65     /// HasSubsectionsViaSymbols - True if this target has the MachO
     66     /// .subsections_via_symbols directive.
     67     bool HasSubsectionsViaSymbols;           // Default is false.
     68 
     69     /// HasMachoZeroFillDirective - True if this is a MachO target that supports
     70     /// the macho-specific .zerofill directive for emitting BSS Symbols.
     71     bool HasMachoZeroFillDirective;               // Default is false.
     72 
     73     /// HasMachoTBSSDirective - True if this is a MachO target that supports
     74     /// the macho-specific .tbss directive for emitting thread local BSS Symbols
     75     bool HasMachoTBSSDirective;                 // Default is false.
     76 
     77     /// HasStaticCtorDtorReferenceInStaticMode - True if the compiler should
     78     /// emit a ".reference .constructors_used" or ".reference .destructors_used"
     79     /// directive after the a static ctor/dtor list.  This directive is only
     80     /// emitted in Static relocation model.
     81     bool HasStaticCtorDtorReferenceInStaticMode;  // Default is false.
     82 
     83     /// LinkerRequiresNonEmptyDwarfLines - True if the linker has a bug and
     84     /// requires that the debug_line section be of a minimum size. In practice
     85     /// such a linker requires a non empty line sequence if a file is present.
     86     bool LinkerRequiresNonEmptyDwarfLines; // Default to false.
     87 
     88     /// MaxInstLength - This is the maximum possible length of an instruction,
     89     /// which is needed to compute the size of an inline asm.
     90     unsigned MaxInstLength;                  // Defaults to 4.
     91 
     92     /// MinInstAlignment - Every possible instruction length is a multiple of
     93     /// this value.  Factored out in .debug_frame and .debug_line.
     94     unsigned MinInstAlignment;                  // Defaults to 1.
     95 
     96     /// PCSymbol - The symbol used to represent the current PC.  Used in PC
     97     /// relative expressions.
     98     const char *PCSymbol;                    // Defaults to "$".
     99 
    100     /// SeparatorString - This string, if specified, is used to separate
    101     /// instructions from each other when on the same line.
    102     const char *SeparatorString;             // Defaults to ';'
    103 
    104     /// CommentColumn - This indicates the comment num (zero-based) at
    105     /// which asm comments should be printed.
    106     unsigned CommentColumn;                  // Defaults to 40
    107 
    108     /// CommentString - This indicates the comment character used by the
    109     /// assembler.
    110     const char *CommentString;               // Defaults to "#"
    111 
    112     /// LabelSuffix - This is appended to emitted labels.
    113     const char *LabelSuffix;                 // Defaults to ":"
    114 
    115     /// LabelSuffix - This is appended to emitted labels.
    116     const char *DebugLabelSuffix;                 // Defaults to ":"
    117 
    118     /// GlobalPrefix - If this is set to a non-empty string, it is prepended
    119     /// onto all global symbols.  This is often used for "_" or ".".
    120     const char *GlobalPrefix;                // Defaults to ""
    121 
    122     /// PrivateGlobalPrefix - This prefix is used for globals like constant
    123     /// pool entries that are completely private to the .s file and should not
    124     /// have names in the .o file.  This is often "." or "L".
    125     const char *PrivateGlobalPrefix;         // Defaults to "."
    126 
    127     /// LinkerPrivateGlobalPrefix - This prefix is used for symbols that should
    128     /// be passed through the assembler but be removed by the linker.  This
    129     /// is "l" on Darwin, currently used for some ObjC metadata.
    130     const char *LinkerPrivateGlobalPrefix;   // Defaults to ""
    131 
    132     /// InlineAsmStart/End - If these are nonempty, they contain a directive to
    133     /// emit before and after an inline assembly statement.
    134     const char *InlineAsmStart;              // Defaults to "#APP\n"
    135     const char *InlineAsmEnd;                // Defaults to "#NO_APP\n"
    136 
    137     /// Code16Directive, Code32Directive, Code64Directive - These are assembly
    138     /// directives that tells the assembler to interpret the following
    139     /// instructions differently.
    140     const char *Code16Directive;             // Defaults to ".code16"
    141     const char *Code32Directive;             // Defaults to ".code32"
    142     const char *Code64Directive;             // Defaults to ".code64"
    143 
    144     /// AssemblerDialect - Which dialect of an assembler variant to use.
    145     unsigned AssemblerDialect;               // Defaults to 0
    146 
    147     /// AllowQuotesInName - This is true if the assembler allows for complex
    148     /// symbol names to be surrounded in quotes.  This defaults to false.
    149     bool AllowQuotesInName;
    150 
    151     /// AllowNameToStartWithDigit - This is true if the assembler allows symbol
    152     /// names to start with a digit (e.g., "0x0021").  This defaults to false.
    153     bool AllowNameToStartWithDigit;
    154 
    155     /// AllowPeriodsInName - This is true if the assembler allows periods in
    156     /// symbol names.  This defaults to true.
    157     bool AllowPeriodsInName;
    158 
    159     /// AllowUTF8 - This is true if the assembler accepts UTF-8 input.
    160     // FIXME: Make this a more general encoding setting?
    161     bool AllowUTF8;
    162 
    163     /// UseDataRegionDirectives - This is true if data region markers should
    164     /// be printed as ".data_region/.end_data_region" directives. If false,
    165     /// use "$d/$a" labels instead.
    166     bool UseDataRegionDirectives;
    167 
    168     //===--- Data Emission Directives -------------------------------------===//
    169 
    170     /// ZeroDirective - this should be set to the directive used to get some
    171     /// number of zero bytes emitted to the current section.  Common cases are
    172     /// "\t.zero\t" and "\t.space\t".  If this is set to null, the
    173     /// Data*bitsDirective's will be used to emit zero bytes.
    174     const char *ZeroDirective;               // Defaults to "\t.zero\t"
    175 
    176     /// AsciiDirective - This directive allows emission of an ascii string with
    177     /// the standard C escape characters embedded into it.
    178     const char *AsciiDirective;              // Defaults to "\t.ascii\t"
    179 
    180     /// AscizDirective - If not null, this allows for special handling of
    181     /// zero terminated strings on this target.  This is commonly supported as
    182     /// ".asciz".  If a target doesn't support this, it can be set to null.
    183     const char *AscizDirective;              // Defaults to "\t.asciz\t"
    184 
    185     /// DataDirectives - These directives are used to output some unit of
    186     /// integer data to the current section.  If a data directive is set to
    187     /// null, smaller data directives will be used to emit the large sizes.
    188     const char *Data8bitsDirective;          // Defaults to "\t.byte\t"
    189     const char *Data16bitsDirective;         // Defaults to "\t.short\t"
    190     const char *Data32bitsDirective;         // Defaults to "\t.long\t"
    191     const char *Data64bitsDirective;         // Defaults to "\t.quad\t"
    192 
    193     /// GPRel64Directive - if non-null, a directive that is used to emit a word
    194     /// which should be relocated as a 64-bit GP-relative offset, e.g. .gpdword
    195     /// on Mips.
    196     const char *GPRel64Directive;            // Defaults to NULL.
    197 
    198     /// GPRel32Directive - if non-null, a directive that is used to emit a word
    199     /// which should be relocated as a 32-bit GP-relative offset, e.g. .gpword
    200     /// on Mips or .gprel32 on Alpha.
    201     const char *GPRel32Directive;            // Defaults to NULL.
    202 
    203     /// SunStyleELFSectionSwitchSyntax - This is true if this target uses "Sun
    204     /// Style" syntax for section switching ("#alloc,#write" etc) instead of the
    205     /// normal ELF syntax (,"a,w") in .section directives.
    206     bool SunStyleELFSectionSwitchSyntax;     // Defaults to false.
    207 
    208     /// UsesELFSectionDirectiveForBSS - This is true if this target uses ELF
    209     /// '.section' directive before the '.bss' one. It's used for PPC/Linux
    210     /// which doesn't support the '.bss' directive only.
    211     bool UsesELFSectionDirectiveForBSS;      // Defaults to false.
    212 
    213     /// HasMicrosoftFastStdCallMangling - True if this target uses microsoft
    214     /// style mangling for functions with X86_StdCall/X86_FastCall calling
    215     /// convention.
    216     bool HasMicrosoftFastStdCallMangling;    // Defaults to false.
    217 
    218     bool NeedsDwarfSectionOffsetDirective;
    219 
    220     //===--- Alignment Information ----------------------------------------===//
    221 
    222     /// AlignDirective - The directive used to emit round up to an alignment
    223     /// boundary.
    224     ///
    225     const char *AlignDirective;              // Defaults to "\t.align\t"
    226 
    227     /// AlignmentIsInBytes - If this is true (the default) then the asmprinter
    228     /// emits ".align N" directives, where N is the number of bytes to align to.
    229     /// Otherwise, it emits ".align log2(N)", e.g. 3 to align to an 8 byte
    230     /// boundary.
    231     bool AlignmentIsInBytes;                 // Defaults to true
    232 
    233     /// TextAlignFillValue - If non-zero, this is used to fill the executable
    234     /// space created as the result of a alignment directive.
    235     unsigned TextAlignFillValue;             // Defaults to 0
    236 
    237     //===--- Global Variable Emission Directives --------------------------===//
    238 
    239     /// GlobalDirective - This is the directive used to declare a global entity.
    240     ///
    241     const char *GlobalDirective;             // Defaults to NULL.
    242 
    243     /// ExternDirective - This is the directive used to declare external
    244     /// globals.
    245     ///
    246     const char *ExternDirective;             // Defaults to NULL.
    247 
    248     /// HasSetDirective - True if the assembler supports the .set directive.
    249     bool HasSetDirective;                    // Defaults to true.
    250 
    251     /// HasAggressiveSymbolFolding - False if the assembler requires that we use
    252     /// Lc = a - b
    253     /// .long Lc
    254     /// instead of
    255     /// .long a - b
    256     bool HasAggressiveSymbolFolding;           // Defaults to true.
    257 
    258     /// COMMDirectiveAlignmentIsInBytes - True is .comm's and .lcomms optional
    259     /// alignment is to be specified in bytes instead of log2(n).
    260     bool COMMDirectiveAlignmentIsInBytes;    // Defaults to true;
    261 
    262     /// LCOMMDirectiveAlignment - Describes if the .lcomm directive for the
    263     /// target supports an alignment argument and how it is interpreted.
    264     LCOMM::LCOMMType LCOMMDirectiveAlignmentType; // Defaults to NoAlignment.
    265 
    266     /// HasDotTypeDotSizeDirective - True if the target has .type and .size
    267     /// directives, this is true for most ELF targets.
    268     bool HasDotTypeDotSizeDirective;         // Defaults to true.
    269 
    270     /// HasSingleParameterDotFile - True if the target has a single parameter
    271     /// .file directive, this is true for ELF targets.
    272     bool HasSingleParameterDotFile;          // Defaults to true.
    273 
    274     /// HasNoDeadStrip - True if this target supports the MachO .no_dead_strip
    275     /// directive.
    276     bool HasNoDeadStrip;                     // Defaults to false.
    277 
    278     /// HasSymbolResolver - True if this target supports the MachO
    279     /// .symbol_resolver directive.
    280     bool HasSymbolResolver;                     // Defaults to false.
    281 
    282     /// WeakRefDirective - This directive, if non-null, is used to declare a
    283     /// global as being a weak undefined symbol.
    284     const char *WeakRefDirective;            // Defaults to NULL.
    285 
    286     /// WeakDefDirective - This directive, if non-null, is used to declare a
    287     /// global as being a weak defined symbol.
    288     const char *WeakDefDirective;            // Defaults to NULL.
    289 
    290     /// LinkOnceDirective - This directive, if non-null is used to declare a
    291     /// global as being a weak defined symbol.  This is used on cygwin/mingw.
    292     const char *LinkOnceDirective;           // Defaults to NULL.
    293 
    294     /// HiddenVisibilityAttr - This attribute, if not MCSA_Invalid, is used to
    295     /// declare a symbol as having hidden visibility.
    296     MCSymbolAttr HiddenVisibilityAttr;       // Defaults to MCSA_Hidden.
    297 
    298     /// HiddenDeclarationVisibilityAttr - This attribute, if not MCSA_Invalid,
    299     /// is used to declare an undefined symbol as having hidden visibility.
    300     MCSymbolAttr HiddenDeclarationVisibilityAttr;   // Defaults to MCSA_Hidden.
    301 
    302 
    303     /// ProtectedVisibilityAttr - This attribute, if not MCSA_Invalid, is used
    304     /// to declare a symbol as having protected visibility.
    305     MCSymbolAttr ProtectedVisibilityAttr;    // Defaults to MCSA_Protected
    306 
    307     //===--- Dwarf Emission Directives -----------------------------------===//
    308 
    309     /// HasLEB128 - True if target asm supports leb128 directives.
    310     bool HasLEB128;                          // Defaults to false.
    311 
    312     /// SupportsDebugInformation - True if target supports emission of debugging
    313     /// information.
    314     bool SupportsDebugInformation;           // Defaults to false.
    315 
    316     /// SupportsExceptionHandling - True if target supports exception handling.
    317     ExceptionHandling::ExceptionsType ExceptionsType; // Defaults to None
    318 
    319     /// DwarfUsesInlineInfoSection - True if DwarfDebugInlineSection is used to
    320     /// encode inline subroutine information.
    321     bool DwarfUsesInlineInfoSection;         // Defaults to false.
    322 
    323     /// DwarfUsesRelocationsAcrossSections - True if Dwarf2 output generally
    324     /// uses relocations for references to other .debug_* sections.
    325     bool DwarfUsesRelocationsAcrossSections;
    326 
    327     /// DwarfRegNumForCFI - True if dwarf register numbers are printed
    328     /// instead of symbolic register names in .cfi_* directives.
    329     bool DwarfRegNumForCFI;  // Defaults to false;
    330 
    331     //===--- Prologue State ----------------------------------------------===//
    332 
    333     std::vector<MCCFIInstruction> InitialFrameState;
    334 
    335   public:
    336     explicit MCAsmInfo();
    337     virtual ~MCAsmInfo();
    338 
    339     // FIXME: move these methods to DwarfPrinter when the JIT stops using them.
    340     static unsigned getSLEB128Size(int64_t Value);
    341     static unsigned getULEB128Size(uint64_t Value);
    342 
    343     /// getPointerSize - Get the pointer size in bytes.
    344     unsigned getPointerSize() const {
    345       return PointerSize;
    346     }
    347 
    348     /// getCalleeSaveStackSlotSize - Get the callee-saved register stack slot
    349     /// size in bytes.
    350     unsigned getCalleeSaveStackSlotSize() const {
    351       return CalleeSaveStackSlotSize;
    352     }
    353 
    354     /// isLittleEndian - True if the target is little endian.
    355     bool isLittleEndian() const {
    356       return IsLittleEndian;
    357     }
    358 
    359     /// isStackGrowthDirectionUp - True if target stack grow up.
    360     bool isStackGrowthDirectionUp() const {
    361       return StackGrowsUp;
    362     }
    363 
    364     bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; }
    365 
    366     // Data directive accessors.
    367     //
    368     const char *getData8bitsDirective() const {
    369       return Data8bitsDirective;
    370     }
    371     const char *getData16bitsDirective() const {
    372       return Data16bitsDirective;
    373     }
    374     const char *getData32bitsDirective() const {
    375       return Data32bitsDirective;
    376     }
    377     const char *getData64bitsDirective() const {
    378       return Data64bitsDirective;
    379     }
    380     const char *getGPRel64Directive() const { return GPRel64Directive; }
    381     const char *getGPRel32Directive() const { return GPRel32Directive; }
    382 
    383     /// getNonexecutableStackSection - Targets can implement this method to
    384     /// specify a section to switch to if the translation unit doesn't have any
    385     /// trampolines that require an executable stack.
    386     virtual const MCSection *getNonexecutableStackSection(MCContext &Ctx) const{
    387       return 0;
    388     }
    389 
    390     virtual const MCExpr *
    391     getExprForPersonalitySymbol(const MCSymbol *Sym,
    392                                 unsigned Encoding,
    393                                 MCStreamer &Streamer) const;
    394 
    395     const MCExpr *
    396     getExprForFDESymbol(const MCSymbol *Sym,
    397                         unsigned Encoding,
    398                         MCStreamer &Streamer) const;
    399 
    400     bool usesSunStyleELFSectionSwitchSyntax() const {
    401       return SunStyleELFSectionSwitchSyntax;
    402     }
    403 
    404     bool usesELFSectionDirectiveForBSS() const {
    405       return UsesELFSectionDirectiveForBSS;
    406     }
    407 
    408     bool hasMicrosoftFastStdCallMangling() const {
    409       return HasMicrosoftFastStdCallMangling;
    410     }
    411 
    412     bool needsDwarfSectionOffsetDirective() const {
    413       return NeedsDwarfSectionOffsetDirective;
    414     }
    415 
    416     // Accessors.
    417     //
    418     bool hasMachoZeroFillDirective() const { return HasMachoZeroFillDirective; }
    419     bool hasMachoTBSSDirective() const { return HasMachoTBSSDirective; }
    420     bool hasStaticCtorDtorReferenceInStaticMode() const {
    421       return HasStaticCtorDtorReferenceInStaticMode;
    422     }
    423     bool getLinkerRequiresNonEmptyDwarfLines() const {
    424       return LinkerRequiresNonEmptyDwarfLines;
    425     }
    426     unsigned getMaxInstLength() const {
    427       return MaxInstLength;
    428     }
    429     unsigned getMinInstAlignment() const {
    430       return MinInstAlignment;
    431     }
    432     const char *getPCSymbol() const {
    433       return PCSymbol;
    434     }
    435     const char *getSeparatorString() const {
    436       return SeparatorString;
    437     }
    438     unsigned getCommentColumn() const {
    439       return CommentColumn;
    440     }
    441     const char *getCommentString() const {
    442       return CommentString;
    443     }
    444     const char *getLabelSuffix() const {
    445       return LabelSuffix;
    446     }
    447 
    448     const char *getDebugLabelSuffix() const {
    449       return DebugLabelSuffix;
    450     }
    451 
    452     const char *getGlobalPrefix() const {
    453       return GlobalPrefix;
    454     }
    455     const char *getPrivateGlobalPrefix() const {
    456       return PrivateGlobalPrefix;
    457     }
    458     const char *getLinkerPrivateGlobalPrefix() const {
    459       return LinkerPrivateGlobalPrefix;
    460     }
    461     const char *getInlineAsmStart() const {
    462       return InlineAsmStart;
    463     }
    464     const char *getInlineAsmEnd() const {
    465       return InlineAsmEnd;
    466     }
    467     const char *getCode16Directive() const {
    468       return Code16Directive;
    469     }
    470     const char *getCode32Directive() const {
    471       return Code32Directive;
    472     }
    473     const char *getCode64Directive() const {
    474       return Code64Directive;
    475     }
    476     unsigned getAssemblerDialect() const {
    477       return AssemblerDialect;
    478     }
    479     bool doesAllowQuotesInName() const {
    480       return AllowQuotesInName;
    481     }
    482     bool doesAllowNameToStartWithDigit() const {
    483       return AllowNameToStartWithDigit;
    484     }
    485     bool doesAllowPeriodsInName() const {
    486       return AllowPeriodsInName;
    487     }
    488     bool doesAllowUTF8() const {
    489       return AllowUTF8;
    490     }
    491     bool doesSupportDataRegionDirectives() const {
    492       return UseDataRegionDirectives;
    493     }
    494     const char *getZeroDirective() const {
    495       return ZeroDirective;
    496     }
    497     const char *getAsciiDirective() const {
    498       return AsciiDirective;
    499     }
    500     const char *getAscizDirective() const {
    501       return AscizDirective;
    502     }
    503     const char *getAlignDirective() const {
    504       return AlignDirective;
    505     }
    506     bool getAlignmentIsInBytes() const {
    507       return AlignmentIsInBytes;
    508     }
    509     unsigned getTextAlignFillValue() const {
    510       return TextAlignFillValue;
    511     }
    512     const char *getGlobalDirective() const {
    513       return GlobalDirective;
    514     }
    515     const char *getExternDirective() const {
    516       return ExternDirective;
    517     }
    518     bool hasSetDirective() const { return HasSetDirective; }
    519     bool hasAggressiveSymbolFolding() const {
    520       return HasAggressiveSymbolFolding;
    521     }
    522     bool getCOMMDirectiveAlignmentIsInBytes() const {
    523       return COMMDirectiveAlignmentIsInBytes;
    524     }
    525     LCOMM::LCOMMType getLCOMMDirectiveAlignmentType() const {
    526       return LCOMMDirectiveAlignmentType;
    527     }
    528     bool hasDotTypeDotSizeDirective() const {return HasDotTypeDotSizeDirective;}
    529     bool hasSingleParameterDotFile() const { return HasSingleParameterDotFile; }
    530     bool hasNoDeadStrip() const { return HasNoDeadStrip; }
    531     bool hasSymbolResolver() const { return HasSymbolResolver; }
    532     const char *getWeakRefDirective() const { return WeakRefDirective; }
    533     const char *getWeakDefDirective() const { return WeakDefDirective; }
    534     const char *getLinkOnceDirective() const { return LinkOnceDirective; }
    535 
    536     MCSymbolAttr getHiddenVisibilityAttr() const { return HiddenVisibilityAttr;}
    537     MCSymbolAttr getHiddenDeclarationVisibilityAttr() const {
    538       return HiddenDeclarationVisibilityAttr;
    539     }
    540     MCSymbolAttr getProtectedVisibilityAttr() const {
    541       return ProtectedVisibilityAttr;
    542     }
    543     bool hasLEB128() const {
    544       return HasLEB128;
    545     }
    546     bool doesSupportDebugInformation() const {
    547       return SupportsDebugInformation;
    548     }
    549     bool doesSupportExceptionHandling() const {
    550       return ExceptionsType != ExceptionHandling::None;
    551     }
    552     ExceptionHandling::ExceptionsType getExceptionHandlingType() const {
    553       return ExceptionsType;
    554     }
    555     bool isExceptionHandlingDwarf() const {
    556       return
    557         (ExceptionsType == ExceptionHandling::DwarfCFI ||
    558          ExceptionsType == ExceptionHandling::ARM ||
    559          ExceptionsType == ExceptionHandling::Win64);
    560     }
    561     bool doesDwarfUseInlineInfoSection() const {
    562       return DwarfUsesInlineInfoSection;
    563     }
    564     bool doesDwarfUseRelocationsAcrossSections() const {
    565       return DwarfUsesRelocationsAcrossSections;
    566     }
    567     bool useDwarfRegNumForCFI() const {
    568       return DwarfRegNumForCFI;
    569     }
    570 
    571     void addInitialFrameState(const MCCFIInstruction &Inst) {
    572       InitialFrameState.push_back(Inst);
    573     }
    574 
    575     const std::vector<MCCFIInstruction> &getInitialFrameState() const {
    576       return InitialFrameState;
    577     }
    578   };
    579 }
    580 
    581 #endif
    582