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