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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 <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 WinEH {
     32 enum class EncodingType {
     33   Invalid, /// Invalid
     34   Alpha,   /// Windows Alpha
     35   Alpha64, /// Windows AXP64
     36   ARM,     /// Windows NT (Windows on ARM)
     37   CE,      /// Windows CE ARM, PowerPC, SH3, SH4
     38   Itanium, /// Windows x64, Windows Itanium (IA-64)
     39   X86,     /// Windows x86, uses no CFI, just EH tables
     40   MIPS = Alpha,
     41 };
     42 }
     43 
     44 enum class ExceptionHandling {
     45   None,     /// No exception support
     46   DwarfCFI, /// DWARF-like instruction based exceptions
     47   SjLj,     /// setjmp/longjmp based exceptions
     48   ARM,      /// ARM EHABI
     49   WinEH,    /// Windows Exception Handling
     50 };
     51 
     52 namespace LCOMM {
     53 enum LCOMMType { NoAlignment, ByteAlignment, Log2Alignment };
     54 }
     55 
     56 enum class DebugCompressionType {
     57   DCT_None,    // no compression
     58   DCT_Zlib,    // zlib style complession
     59   DCT_ZlibGnu  // zlib-gnu style compression
     60 };
     61 
     62 /// This class is intended to be used as a base class for asm
     63 /// properties and features specific to the target.
     64 class MCAsmInfo {
     65 protected:
     66   //===------------------------------------------------------------------===//
     67   // Properties to be set by the target writer, used to configure asm printer.
     68   //
     69 
     70   /// Pointer size in bytes.  Default is 4.
     71   unsigned PointerSize;
     72 
     73   /// Size of the stack slot reserved for callee-saved registers, in bytes.
     74   /// Default is same as pointer size.
     75   unsigned CalleeSaveStackSlotSize;
     76 
     77   /// True if target is little endian.  Default is true.
     78   bool IsLittleEndian;
     79 
     80   /// True if target stack grow up.  Default is false.
     81   bool StackGrowsUp;
     82 
     83   /// True if this target has the MachO .subsections_via_symbols directive.
     84   /// Default is false.
     85   bool HasSubsectionsViaSymbols;
     86 
     87   /// True if this is a MachO target that supports the macho-specific .zerofill
     88   /// directive for emitting BSS Symbols.  Default is false.
     89   bool HasMachoZeroFillDirective;
     90 
     91   /// True if this is a MachO target that supports the macho-specific .tbss
     92   /// directive for emitting thread local BSS Symbols.  Default is false.
     93   bool HasMachoTBSSDirective;
     94 
     95   /// True if the compiler should emit a ".reference .constructors_used" or
     96   /// ".reference .destructors_used" directive after the static ctor/dtor
     97   /// list.  This directive is only emitted in Static relocation model.  Default
     98   /// is false.
     99   bool HasStaticCtorDtorReferenceInStaticMode;
    100 
    101   /// This is the maximum possible length of an instruction, which is needed to
    102   /// compute the size of an inline asm.  Defaults to 4.
    103   unsigned MaxInstLength;
    104 
    105   /// Every possible instruction length is a multiple of this value.  Factored
    106   /// out in .debug_frame and .debug_line.  Defaults to 1.
    107   unsigned MinInstAlignment;
    108 
    109   /// The '$' token, when not referencing an identifier or constant, refers to
    110   /// the current PC.  Defaults to false.
    111   bool DollarIsPC;
    112 
    113   /// This string, if specified, is used to separate instructions from each
    114   /// other when on the same line.  Defaults to ';'
    115   const char *SeparatorString;
    116 
    117   /// This indicates the comment character used by the assembler.  Defaults to
    118   /// "#"
    119   const char *CommentString;
    120 
    121   /// This is appended to emitted labels.  Defaults to ":"
    122   const char *LabelSuffix;
    123 
    124   // Print the EH begin symbol with an assignment. Defaults to false.
    125   bool UseAssignmentForEHBegin;
    126 
    127   // Do we need to create a local symbol for .size?
    128   bool NeedsLocalForSize;
    129 
    130   /// This prefix is used for globals like constant pool entries that are
    131   /// completely private to the .s file and should not have names in the .o
    132   /// file.  Defaults to "L"
    133   const char *PrivateGlobalPrefix;
    134 
    135   /// This prefix is used for labels for basic blocks. Defaults to the same as
    136   /// PrivateGlobalPrefix.
    137   const char *PrivateLabelPrefix;
    138 
    139   /// This prefix is used for symbols that should be passed through the
    140   /// assembler but be removed by the linker.  This is 'l' on Darwin, currently
    141   /// used for some ObjC metadata.  The default of "" meast that for this system
    142   /// a plain private symbol should be used.  Defaults to "".
    143   const char *LinkerPrivateGlobalPrefix;
    144 
    145   /// If these are nonempty, they contain a directive to emit before and after
    146   /// an inline assembly statement.  Defaults to "#APP\n", "#NO_APP\n"
    147   const char *InlineAsmStart;
    148   const char *InlineAsmEnd;
    149 
    150   /// These are assembly directives that tells the assembler to interpret the
    151   /// following instructions differently.  Defaults to ".code16", ".code32",
    152   /// ".code64".
    153   const char *Code16Directive;
    154   const char *Code32Directive;
    155   const char *Code64Directive;
    156 
    157   /// Which dialect of an assembler variant to use.  Defaults to 0
    158   unsigned AssemblerDialect;
    159 
    160   /// This is true if the assembler allows @ characters in symbol names.
    161   /// Defaults to false.
    162   bool AllowAtInName;
    163 
    164   /// If this is true, symbol names with invalid characters will be printed in
    165   /// quotes.
    166   bool SupportsQuotedNames;
    167 
    168   /// This is true if data region markers should be printed as
    169   /// ".data_region/.end_data_region" directives. If false, use "$d/$a" labels
    170   /// instead.
    171   bool UseDataRegionDirectives;
    172 
    173   //===--- Data Emission Directives -------------------------------------===//
    174 
    175   /// This should be set to the directive used to get some number of zero bytes
    176   /// emitted to the current section.  Common cases are "\t.zero\t" and
    177   /// "\t.space\t".  If this is set to null, the Data*bitsDirective's will be
    178   /// used to emit zero bytes.  Defaults to "\t.zero\t"
    179   const char *ZeroDirective;
    180 
    181   /// This directive allows emission of an ascii string with the standard C
    182   /// escape characters embedded into it.  Defaults to "\t.ascii\t"
    183   const char *AsciiDirective;
    184 
    185   /// If not null, this allows for special handling of zero terminated strings
    186   /// on this target.  This is commonly supported as ".asciz".  If a target
    187   /// doesn't support this, it can be set to null.  Defaults to "\t.asciz\t"
    188   const char *AscizDirective;
    189 
    190   /// These directives are used to output some unit of integer data to the
    191   /// current section.  If a data directive is set to null, smaller data
    192   /// directives will be used to emit the large sizes.  Defaults to "\t.byte\t",
    193   /// "\t.short\t", "\t.long\t", "\t.quad\t"
    194   const char *Data8bitsDirective;
    195   const char *Data16bitsDirective;
    196   const char *Data32bitsDirective;
    197   const char *Data64bitsDirective;
    198 
    199   /// If non-null, a directive that is used to emit a word which should be
    200   /// relocated as a 64-bit GP-relative offset, e.g. .gpdword on Mips.  Defaults
    201   /// to NULL.
    202   const char *GPRel64Directive;
    203 
    204   /// If non-null, a directive that is used to emit a word which should be
    205   /// relocated as a 32-bit GP-relative offset, e.g. .gpword on Mips or .gprel32
    206   /// on Alpha.  Defaults to NULL.
    207   const char *GPRel32Directive;
    208 
    209   /// This is true if this target uses "Sun Style" syntax for section switching
    210   /// ("#alloc,#write" etc) instead of the normal ELF syntax (,"a,w") in
    211   /// .section directives.  Defaults to false.
    212   bool SunStyleELFSectionSwitchSyntax;
    213 
    214   /// This is true if this target uses ELF '.section' directive before the
    215   /// '.bss' one. It's used for PPC/Linux which doesn't support the '.bss'
    216   /// directive only.  Defaults to false.
    217   bool UsesELFSectionDirectiveForBSS;
    218 
    219   bool NeedsDwarfSectionOffsetDirective;
    220 
    221   //===--- Alignment Information ----------------------------------------===//
    222 
    223   /// If this is true (the default) then the asmprinter emits ".align N"
    224   /// directives, where N is the number of bytes to align to.  Otherwise, it
    225   /// emits ".align log2(N)", e.g. 3 to align to an 8 byte boundary.  Defaults
    226   /// to true.
    227   bool AlignmentIsInBytes;
    228 
    229   /// If non-zero, this is used to fill the executable space created as the
    230   /// result of a alignment directive.  Defaults to 0
    231   unsigned TextAlignFillValue;
    232 
    233   //===--- Global Variable Emission Directives --------------------------===//
    234 
    235   /// This is the directive used to declare a global entity. Defaults to
    236   /// ".globl".
    237   const char *GlobalDirective;
    238 
    239   /// True if the expression
    240   ///   .long f - g
    241   /// uses a relocation but it can be suppressed by writing
    242   ///   a = f - g
    243   ///   .long a
    244   bool SetDirectiveSuppressesReloc;
    245 
    246   /// False if the assembler requires that we use
    247   /// \code
    248   ///   Lc = a - b
    249   ///   .long Lc
    250   /// \endcode
    251   //
    252   /// instead of
    253   //
    254   /// \code
    255   ///   .long a - b
    256   /// \endcode
    257   ///
    258   ///  Defaults to true.
    259   bool HasAggressiveSymbolFolding;
    260 
    261   /// True is .comm's and .lcomms optional alignment is to be specified in bytes
    262   /// instead of log2(n).  Defaults to true.
    263   bool COMMDirectiveAlignmentIsInBytes;
    264 
    265   /// Describes if the .lcomm directive for the target supports an alignment
    266   /// argument and how it is interpreted.  Defaults to NoAlignment.
    267   LCOMM::LCOMMType LCOMMDirectiveAlignmentType;
    268 
    269   // True if the target allows .align directives on functions. This is true for
    270   // most targets, so defaults to true.
    271   bool HasFunctionAlignment;
    272 
    273   /// True if the target has .type and .size directives, this is true for most
    274   /// ELF targets.  Defaults to true.
    275   bool HasDotTypeDotSizeDirective;
    276 
    277   /// True if the target has a single parameter .file directive, this is true
    278   /// for ELF targets.  Defaults to true.
    279   bool HasSingleParameterDotFile;
    280 
    281   /// True if the target has a .ident directive, this is true for ELF targets.
    282   /// Defaults to false.
    283   bool HasIdentDirective;
    284 
    285   /// True if this target supports the MachO .no_dead_strip directive.  Defaults
    286   /// to false.
    287   bool HasNoDeadStrip;
    288 
    289   /// True if this target supports the MachO .alt_entry directive.  Defaults to
    290   /// false.
    291   bool HasAltEntry;
    292 
    293   /// Used to declare a global as being a weak symbol. Defaults to ".weak".
    294   const char *WeakDirective;
    295 
    296   /// This directive, if non-null, is used to declare a global as being a weak
    297   /// undefined symbol.  Defaults to NULL.
    298   const char *WeakRefDirective;
    299 
    300   /// True if we have a directive to declare a global as being a weak defined
    301   /// symbol.  Defaults to false.
    302   bool HasWeakDefDirective;
    303 
    304   /// True if we have a directive to declare a global as being a weak defined
    305   /// symbol that can be hidden (unexported).  Defaults to false.
    306   bool HasWeakDefCanBeHiddenDirective;
    307 
    308   /// True if we have a .linkonce directive.  This is used on cygwin/mingw.
    309   /// Defaults to false.
    310   bool HasLinkOnceDirective;
    311 
    312   /// This attribute, if not MCSA_Invalid, is used to declare a symbol as having
    313   /// hidden visibility.  Defaults to MCSA_Hidden.
    314   MCSymbolAttr HiddenVisibilityAttr;
    315 
    316   /// This attribute, if not MCSA_Invalid, is used to declare an undefined
    317   /// symbol as having hidden visibility. Defaults to MCSA_Hidden.
    318   MCSymbolAttr HiddenDeclarationVisibilityAttr;
    319 
    320   /// This attribute, if not MCSA_Invalid, is used to declare a symbol as having
    321   /// protected visibility.  Defaults to MCSA_Protected
    322   MCSymbolAttr ProtectedVisibilityAttr;
    323 
    324   //===--- Dwarf Emission Directives -----------------------------------===//
    325 
    326   /// True if target supports emission of debugging information.  Defaults to
    327   /// false.
    328   bool SupportsDebugInformation;
    329 
    330   /// Exception handling format for the target.  Defaults to None.
    331   ExceptionHandling ExceptionsType;
    332 
    333   /// Windows exception handling data (.pdata) encoding.  Defaults to Invalid.
    334   WinEH::EncodingType WinEHEncodingType;
    335 
    336   /// True if Dwarf2 output generally uses relocations for references to other
    337   /// .debug_* sections.
    338   bool DwarfUsesRelocationsAcrossSections;
    339 
    340   /// True if DWARF FDE symbol reference relocations should be replaced by an
    341   /// absolute difference.
    342   bool DwarfFDESymbolsUseAbsDiff;
    343 
    344   /// True if dwarf register numbers are printed instead of symbolic register
    345   /// names in .cfi_* directives.  Defaults to false.
    346   bool DwarfRegNumForCFI;
    347 
    348   /// True if target uses parens to indicate the symbol variant instead of @.
    349   /// For example, foo(plt) instead of foo@plt.  Defaults to false.
    350   bool UseParensForSymbolVariant;
    351 
    352   //===--- Prologue State ----------------------------------------------===//
    353 
    354   std::vector<MCCFIInstruction> InitialFrameState;
    355 
    356   //===--- Integrated Assembler Information ----------------------------===//
    357 
    358   /// Should we use the integrated assembler?
    359   /// The integrated assembler should be enabled by default (by the
    360   /// constructors) when failing to parse a valid piece of assembly (inline
    361   /// or otherwise) is considered a bug. It may then be overridden after
    362   /// construction (see LLVMTargetMachine::initAsmInfo()).
    363   bool UseIntegratedAssembler;
    364 
    365   /// Preserve Comments in assembly
    366   bool PreserveAsmComments;
    367 
    368   /// Compress DWARF debug sections. Defaults to no compression.
    369   DebugCompressionType CompressDebugSections;
    370 
    371   /// True if the integrated assembler should interpret 'a >> b' constant
    372   /// expressions as logical rather than arithmetic.
    373   bool UseLogicalShr;
    374 
    375   // If true, emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL, on
    376   // X86_64 ELF.
    377   bool RelaxELFRelocations = true;
    378 
    379 public:
    380   explicit MCAsmInfo();
    381   virtual ~MCAsmInfo();
    382 
    383   /// Get the pointer size in bytes.
    384   unsigned getPointerSize() const { return PointerSize; }
    385 
    386   /// Get the callee-saved register stack slot
    387   /// size in bytes.
    388   unsigned getCalleeSaveStackSlotSize() const {
    389     return CalleeSaveStackSlotSize;
    390   }
    391 
    392   /// True if the target is little endian.
    393   bool isLittleEndian() const { return IsLittleEndian; }
    394 
    395   /// True if target stack grow up.
    396   bool isStackGrowthDirectionUp() const { return StackGrowsUp; }
    397 
    398   bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; }
    399 
    400   // Data directive accessors.
    401 
    402   const char *getData8bitsDirective() const { return Data8bitsDirective; }
    403   const char *getData16bitsDirective() const { return Data16bitsDirective; }
    404   const char *getData32bitsDirective() const { return Data32bitsDirective; }
    405   const char *getData64bitsDirective() const { return Data64bitsDirective; }
    406   const char *getGPRel64Directive() const { return GPRel64Directive; }
    407   const char *getGPRel32Directive() const { return GPRel32Directive; }
    408 
    409   /// Targets can implement this method to specify a section to switch to if the
    410   /// translation unit doesn't have any trampolines that require an executable
    411   /// stack.
    412   virtual MCSection *getNonexecutableStackSection(MCContext &Ctx) const {
    413     return nullptr;
    414   }
    415 
    416   /// \brief True if the section is atomized using the symbols in it.
    417   /// This is false if the section is not atomized at all (most ELF sections) or
    418   /// if it is atomized based on its contents (MachO' __TEXT,__cstring for
    419   /// example).
    420   virtual bool isSectionAtomizableBySymbols(const MCSection &Section) const;
    421 
    422   virtual const MCExpr *getExprForPersonalitySymbol(const MCSymbol *Sym,
    423                                                     unsigned Encoding,
    424                                                     MCStreamer &Streamer) const;
    425 
    426   virtual const MCExpr *getExprForFDESymbol(const MCSymbol *Sym,
    427                                             unsigned Encoding,
    428                                             MCStreamer &Streamer) const;
    429 
    430   /// Return true if the identifier \p Name does not need quotes to be
    431   /// syntactically correct.
    432   virtual bool isValidUnquotedName(StringRef Name) const;
    433 
    434   /// Return true if the .section directive should be omitted when
    435   /// emitting \p SectionName.  For example:
    436   ///
    437   /// shouldOmitSectionDirective(".text")
    438   ///
    439   /// returns false => .section .text,#alloc,#execinstr
    440   /// returns true  => .text
    441   virtual bool shouldOmitSectionDirective(StringRef SectionName) const;
    442 
    443   bool usesSunStyleELFSectionSwitchSyntax() const {
    444     return SunStyleELFSectionSwitchSyntax;
    445   }
    446 
    447   bool usesELFSectionDirectiveForBSS() const {
    448     return UsesELFSectionDirectiveForBSS;
    449   }
    450 
    451   bool needsDwarfSectionOffsetDirective() const {
    452     return NeedsDwarfSectionOffsetDirective;
    453   }
    454 
    455   // Accessors.
    456 
    457   bool hasMachoZeroFillDirective() const { return HasMachoZeroFillDirective; }
    458   bool hasMachoTBSSDirective() const { return HasMachoTBSSDirective; }
    459   bool hasStaticCtorDtorReferenceInStaticMode() const {
    460     return HasStaticCtorDtorReferenceInStaticMode;
    461   }
    462   unsigned getMaxInstLength() const { return MaxInstLength; }
    463   unsigned getMinInstAlignment() const { return MinInstAlignment; }
    464   bool getDollarIsPC() const { return DollarIsPC; }
    465   const char *getSeparatorString() const { return SeparatorString; }
    466 
    467   /// This indicates the column (zero-based) at which asm comments should be
    468   /// printed.
    469   unsigned getCommentColumn() const { return 40; }
    470 
    471   const char *getCommentString() const { return CommentString; }
    472   const char *getLabelSuffix() const { return LabelSuffix; }
    473 
    474   bool useAssignmentForEHBegin() const { return UseAssignmentForEHBegin; }
    475   bool needsLocalForSize() const { return NeedsLocalForSize; }
    476   const char *getPrivateGlobalPrefix() const { return PrivateGlobalPrefix; }
    477   const char *getPrivateLabelPrefix() const { return PrivateLabelPrefix; }
    478   bool hasLinkerPrivateGlobalPrefix() const {
    479     return LinkerPrivateGlobalPrefix[0] != '\0';
    480   }
    481   const char *getLinkerPrivateGlobalPrefix() const {
    482     if (hasLinkerPrivateGlobalPrefix())
    483       return LinkerPrivateGlobalPrefix;
    484     return getPrivateGlobalPrefix();
    485   }
    486   const char *getInlineAsmStart() const { return InlineAsmStart; }
    487   const char *getInlineAsmEnd() const { return InlineAsmEnd; }
    488   const char *getCode16Directive() const { return Code16Directive; }
    489   const char *getCode32Directive() const { return Code32Directive; }
    490   const char *getCode64Directive() const { return Code64Directive; }
    491   unsigned getAssemblerDialect() const { return AssemblerDialect; }
    492   bool doesAllowAtInName() const { return AllowAtInName; }
    493   bool supportsNameQuoting() const { return SupportsQuotedNames; }
    494   bool doesSupportDataRegionDirectives() const {
    495     return UseDataRegionDirectives;
    496   }
    497   const char *getZeroDirective() const { return ZeroDirective; }
    498   const char *getAsciiDirective() const { return AsciiDirective; }
    499   const char *getAscizDirective() const { return AscizDirective; }
    500   bool getAlignmentIsInBytes() const { return AlignmentIsInBytes; }
    501   unsigned getTextAlignFillValue() const { return TextAlignFillValue; }
    502   const char *getGlobalDirective() const { return GlobalDirective; }
    503   bool doesSetDirectiveSuppressReloc() const {
    504     return SetDirectiveSuppressesReloc;
    505   }
    506   bool hasAggressiveSymbolFolding() const { return HasAggressiveSymbolFolding; }
    507   bool getCOMMDirectiveAlignmentIsInBytes() const {
    508     return COMMDirectiveAlignmentIsInBytes;
    509   }
    510   LCOMM::LCOMMType getLCOMMDirectiveAlignmentType() const {
    511     return LCOMMDirectiveAlignmentType;
    512   }
    513   bool hasFunctionAlignment() const { return HasFunctionAlignment; }
    514   bool hasDotTypeDotSizeDirective() const { return HasDotTypeDotSizeDirective; }
    515   bool hasSingleParameterDotFile() const { return HasSingleParameterDotFile; }
    516   bool hasIdentDirective() const { return HasIdentDirective; }
    517   bool hasNoDeadStrip() const { return HasNoDeadStrip; }
    518   bool hasAltEntry() const { return HasAltEntry; }
    519   const char *getWeakDirective() const { return WeakDirective; }
    520   const char *getWeakRefDirective() const { return WeakRefDirective; }
    521   bool hasWeakDefDirective() const { return HasWeakDefDirective; }
    522   bool hasWeakDefCanBeHiddenDirective() const {
    523     return HasWeakDefCanBeHiddenDirective;
    524   }
    525   bool hasLinkOnceDirective() const { return HasLinkOnceDirective; }
    526 
    527   MCSymbolAttr getHiddenVisibilityAttr() const { return HiddenVisibilityAttr; }
    528   MCSymbolAttr getHiddenDeclarationVisibilityAttr() const {
    529     return HiddenDeclarationVisibilityAttr;
    530   }
    531   MCSymbolAttr getProtectedVisibilityAttr() const {
    532     return ProtectedVisibilityAttr;
    533   }
    534   bool doesSupportDebugInformation() const { return SupportsDebugInformation; }
    535   bool doesSupportExceptionHandling() const {
    536     return ExceptionsType != ExceptionHandling::None;
    537   }
    538   ExceptionHandling getExceptionHandlingType() const { return ExceptionsType; }
    539   WinEH::EncodingType getWinEHEncodingType() const { return WinEHEncodingType; }
    540 
    541   void setExceptionsType(ExceptionHandling EH) {
    542     ExceptionsType = EH;
    543   }
    544 
    545   /// Returns true if the exception handling method for the platform uses call
    546   /// frame information to unwind.
    547   bool usesCFIForEH() const {
    548     return (ExceptionsType == ExceptionHandling::DwarfCFI ||
    549             ExceptionsType == ExceptionHandling::ARM || usesWindowsCFI());
    550   }
    551 
    552   bool usesWindowsCFI() const {
    553     return ExceptionsType == ExceptionHandling::WinEH &&
    554            (WinEHEncodingType != WinEH::EncodingType::Invalid &&
    555             WinEHEncodingType != WinEH::EncodingType::X86);
    556   }
    557 
    558   bool doesDwarfUseRelocationsAcrossSections() const {
    559     return DwarfUsesRelocationsAcrossSections;
    560   }
    561   bool doDwarfFDESymbolsUseAbsDiff() const { return DwarfFDESymbolsUseAbsDiff; }
    562   bool useDwarfRegNumForCFI() const { return DwarfRegNumForCFI; }
    563   bool useParensForSymbolVariant() const { return UseParensForSymbolVariant; }
    564 
    565   void addInitialFrameState(const MCCFIInstruction &Inst) {
    566     InitialFrameState.push_back(Inst);
    567   }
    568 
    569   const std::vector<MCCFIInstruction> &getInitialFrameState() const {
    570     return InitialFrameState;
    571   }
    572 
    573   /// Return true if assembly (inline or otherwise) should be parsed.
    574   bool useIntegratedAssembler() const { return UseIntegratedAssembler; }
    575 
    576   /// Set whether assembly (inline or otherwise) should be parsed.
    577   virtual void setUseIntegratedAssembler(bool Value) {
    578     UseIntegratedAssembler = Value;
    579   }
    580 
    581   /// Return true if assembly (inline or otherwise) should be parsed.
    582   bool preserveAsmComments() const { return PreserveAsmComments; }
    583 
    584   /// Set whether assembly (inline or otherwise) should be parsed.
    585   virtual void setPreserveAsmComments(bool Value) {
    586     PreserveAsmComments = Value;
    587   }
    588 
    589   DebugCompressionType compressDebugSections() const {
    590     return CompressDebugSections;
    591   }
    592 
    593   void setCompressDebugSections(DebugCompressionType CompressDebugSections) {
    594     this->CompressDebugSections = CompressDebugSections;
    595   }
    596 
    597   bool shouldUseLogicalShr() const { return UseLogicalShr; }
    598 
    599   bool canRelaxRelocations() const { return RelaxELFRelocations; }
    600   void setRelaxELFRelocations(bool V) { RelaxELFRelocations = V; }
    601 };
    602 }
    603 
    604 #endif
    605