include/llvm/MC/MCAsmInfo.h

   1 //===-- llvm/MC/MCAsmInfo.h - Asm info --------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file contains a class to be used as the basis for target specific
  10 // asm writers.  This class primarily takes care of global printing constants,
  11 // which are used in very similar ways across all targets.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef LLVM_MC_MCASMINFO_H
  16 #define LLVM_MC_MCASMINFO_H
  17
  18 #include "llvm/ADT/StringRef.h"
  19 #include "llvm/MC/MCDirectives.h"
  20 #include "llvm/MC/MCDwarf.h"
  21 #include "llvm/MC/MCTargetOptions.h"
  22 #include <vector>
  23
  24 namespace llvm {
  25
  26 class MCContext;
  27 class MCExpr;
  28 class MCSection;
  29 class MCStreamer;
  30 class MCSymbol;
  31
  32 namespace WinEH {
  33
  34 enum class EncodingType {
  35   Invalid, /// Invalid
  36   Alpha,   /// Windows Alpha
  37   Alpha64, /// Windows AXP64
  38   ARM,     /// Windows NT (Windows on ARM)
  39   CE,      /// Windows CE ARM, PowerPC, SH3, SH4
  40   Itanium, /// Windows x64, Windows Itanium (IA-64)
  41   X86,     /// Windows x86, uses no CFI, just EH tables
  42   MIPS = Alpha,
  43 };
  44
  45 } // end namespace WinEH
  46
  47 namespace LCOMM {
  48
  49 enum LCOMMType { NoAlignment, ByteAlignment, Log2Alignment };
  50
  51 } // end namespace LCOMM
  52
  53 /// This class is intended to be used as a base class for asm
  54 /// properties and features specific to the target.
  55 class MCAsmInfo {
  56 protected:
  57   //===------------------------------------------------------------------===//
  58   // Properties to be set by the target writer, used to configure asm printer.
  59   //
  60
  61   /// Code pointer size in bytes.  Default is 4.
  62   unsigned CodePointerSize = 4;
  63
  64   /// Size of the stack slot reserved for callee-saved registers, in bytes.
  65   /// Default is same as pointer size.
  66   unsigned CalleeSaveStackSlotSize = 4;
  67
  68   /// True if target is little endian.  Default is true.
  69   bool IsLittleEndian = true;
  70
  71   /// True if target stack grow up.  Default is false.
  72   bool StackGrowsUp = false;
  73
  74   /// True if this target has the MachO .subsections_via_symbols directive.
  75   /// Default is false.
  76   bool HasSubsectionsViaSymbols = false;
  77
  78   /// True if this is a MachO target that supports the macho-specific .zerofill
  79   /// directive for emitting BSS Symbols.  Default is false.
  80   bool HasMachoZeroFillDirective = false;
  81
  82   /// True if this is a MachO target that supports the macho-specific .tbss
  83   /// directive for emitting thread local BSS Symbols.  Default is false.
  84   bool HasMachoTBSSDirective = false;
  85
  86   /// True if this is a non-GNU COFF target. The COFF port of the GNU linker
  87   /// doesn't handle associative comdats in the way that we would like to use
  88   /// them.
  89   bool HasCOFFAssociativeComdats = false;
  90
  91   /// True if this is a non-GNU COFF target. For GNU targets, we don't generate
  92   /// constants into comdat sections.
  93   bool HasCOFFComdatConstants = false;
  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 = 4;
  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 = 1;
 102
 103   /// The '$' token, when not referencing an identifier or constant, refers to
 104   /// the current PC.  Defaults to false.
 105   bool DollarIsPC = false;
 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   StringRef 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 = false;
 120
 121   // Do we need to create a local symbol for .size?
 122   bool NeedsLocalForSize = false;
 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   StringRef PrivateGlobalPrefix;
 128
 129   /// This prefix is used for labels for basic blocks. Defaults to the same as
 130   /// PrivateGlobalPrefix.
 131   StringRef 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   StringRef 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 = 0;
 153
 154   /// This is true if the assembler allows @ characters in symbol names.
 155   /// Defaults to false.
 156   bool AllowAtInName = false;
 157
 158   /// If this is true, symbol names with invalid characters will be printed in
 159   /// quotes.
 160   bool SupportsQuotedNames = true;
 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 = false;
 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.  If a target doesn't support this, it
 177   /// can be set to null. Defaults to "\t.ascii\t"
 178   const char *AsciiDirective;
 179
 180   /// If not null, this allows for special handling of zero terminated strings
 181   /// on this target.  This is commonly supported as ".asciz".  If a target
 182   /// doesn't support this, it can be set to null.  Defaults to "\t.asciz\t"
 183   const char *AscizDirective;
 184
 185   /// These directives are used to output some unit of integer data to the
 186   /// current section.  If a data directive is set to null, smaller data
 187   /// directives will be used to emit the large sizes.  Defaults to "\t.byte\t",
 188   /// "\t.short\t", "\t.long\t", "\t.quad\t"
 189   const char *Data8bitsDirective;
 190   const char *Data16bitsDirective;
 191   const char *Data32bitsDirective;
 192   const char *Data64bitsDirective;
 193
 194   /// If non-null, a directive that is used to emit a word which should be
 195   /// relocated as a 64-bit GP-relative offset, e.g. .gpdword on Mips.  Defaults
 196   /// to nullptr.
 197   const char *GPRel64Directive = nullptr;
 198
 199   /// If non-null, a directive that is used to emit a word which should be
 200   /// relocated as a 32-bit GP-relative offset, e.g. .gpword on Mips or .gprel32
 201   /// on Alpha.  Defaults to nullptr.
 202   const char *GPRel32Directive = nullptr;
 203
 204   /// If non-null, directives that are used to emit a word/dword which should
 205   /// be relocated as a 32/64-bit DTP/TP-relative offset, e.g. .dtprelword/
 206   /// .dtpreldword/.tprelword/.tpreldword on Mips.
 207   const char *DTPRel32Directive = nullptr;
 208   const char *DTPRel64Directive = nullptr;
 209   const char *TPRel32Directive = nullptr;
 210   const char *TPRel64Directive = nullptr;
 211
 212   /// This is true if this target uses "Sun Style" syntax for section switching
 213   /// ("#alloc,#write" etc) instead of the normal ELF syntax (,"a,w") in
 214   /// .section directives.  Defaults to false.
 215   bool SunStyleELFSectionSwitchSyntax = false;
 216
 217   /// This is true if this target uses ELF '.section' directive before the
 218   /// '.bss' one. It's used for PPC/Linux which doesn't support the '.bss'
 219   /// directive only.  Defaults to false.
 220   bool UsesELFSectionDirectiveForBSS = false;
 221
 222   bool NeedsDwarfSectionOffsetDirective = false;
 223
 224   //===--- Alignment Information ----------------------------------------===//
 225
 226   /// If this is true (the default) then the asmprinter emits ".align N"
 227   /// directives, where N is the number of bytes to align to.  Otherwise, it
 228   /// emits ".align log2(N)", e.g. 3 to align to an 8 byte boundary.  Defaults
 229   /// to true.
 230   bool AlignmentIsInBytes = true;
 231
 232   /// If non-zero, this is used to fill the executable space created as the
 233   /// result of a alignment directive.  Defaults to 0
 234   unsigned TextAlignFillValue = 0;
 235
 236   //===--- Global Variable Emission Directives --------------------------===//
 237
 238   /// This is the directive used to declare a global entity. Defaults to
 239   /// ".globl".
 240   const char *GlobalDirective;
 241
 242   /// True if the expression
 243   ///   .long f - g
 244   /// uses a relocation but it can be suppressed by writing
 245   ///   a = f - g
 246   ///   .long a
 247   bool SetDirectiveSuppressesReloc = false;
 248
 249   /// False if the assembler requires that we use
 250   /// \code
 251   ///   Lc = a - b
 252   ///   .long Lc
 253   /// \endcode
 254   //
 255   /// instead of
 256   //
 257   /// \code
 258   ///   .long a - b
 259   /// \endcode
 260   ///
 261   ///  Defaults to true.
 262   bool HasAggressiveSymbolFolding = true;
 263
 264   /// True is .comm's and .lcomms optional alignment is to be specified in bytes
 265   /// instead of log2(n).  Defaults to true.
 266   bool COMMDirectiveAlignmentIsInBytes = true;
 267
 268   /// Describes if the .lcomm directive for the target supports an alignment
 269   /// argument and how it is interpreted.  Defaults to NoAlignment.
 270   LCOMM::LCOMMType LCOMMDirectiveAlignmentType = LCOMM::NoAlignment;
 271
 272   // True if the target allows .align directives on functions. This is true for
 273   // most targets, so defaults to true.
 274   bool HasFunctionAlignment = true;
 275
 276   /// True if the target has .type and .size directives, this is true for most
 277   /// ELF targets.  Defaults to true.
 278   bool HasDotTypeDotSizeDirective = true;
 279
 280   /// True if the target has a single parameter .file directive, this is true
 281   /// for ELF targets.  Defaults to true.
 282   bool HasSingleParameterDotFile = true;
 283
 284   /// True if the target has a .ident directive, this is true for ELF targets.
 285   /// Defaults to false.
 286   bool HasIdentDirective = false;
 287
 288   /// True if this target supports the MachO .no_dead_strip directive.  Defaults
 289   /// to false.
 290   bool HasNoDeadStrip = false;
 291
 292   /// True if this target supports the MachO .alt_entry directive.  Defaults to
 293   /// false.
 294   bool HasAltEntry = false;
 295
 296   /// Used to declare a global as being a weak symbol. Defaults to ".weak".
 297   const char *WeakDirective;
 298
 299   /// This directive, if non-null, is used to declare a global as being a weak
 300   /// undefined symbol.  Defaults to nullptr.
 301   const char *WeakRefDirective = nullptr;
 302
 303   /// True if we have a directive to declare a global as being a weak defined
 304   /// symbol.  Defaults to false.
 305   bool HasWeakDefDirective = false;
 306
 307   /// True if we have a directive to declare a global as being a weak defined
 308   /// symbol that can be hidden (unexported).  Defaults to false.
 309   bool HasWeakDefCanBeHiddenDirective = false;
 310
 311   /// True if we have a .linkonce directive.  This is used on cygwin/mingw.
 312   /// Defaults to false.
 313   bool HasLinkOnceDirective = false;
 314
 315   /// This attribute, if not MCSA_Invalid, is used to declare a symbol as having
 316   /// hidden visibility.  Defaults to MCSA_Hidden.
 317   MCSymbolAttr HiddenVisibilityAttr = MCSA_Hidden;
 318
 319   /// This attribute, if not MCSA_Invalid, is used to declare an undefined
 320   /// symbol as having hidden visibility. Defaults to MCSA_Hidden.
 321   MCSymbolAttr HiddenDeclarationVisibilityAttr = MCSA_Hidden;
 322
 323   /// This attribute, if not MCSA_Invalid, is used to declare a symbol as having
 324   /// protected visibility.  Defaults to MCSA_Protected
 325   MCSymbolAttr ProtectedVisibilityAttr = MCSA_Protected;
 326
 327   //===--- Dwarf Emission Directives -----------------------------------===//
 328
 329   /// True if target supports emission of debugging information.  Defaults to
 330   /// false.
 331   bool SupportsDebugInformation = false;
 332
 333   /// Exception handling format for the target.  Defaults to None.
 334   ExceptionHandling ExceptionsType = ExceptionHandling::None;
 335
 336   /// Windows exception handling data (.pdata) encoding.  Defaults to Invalid.
 337   WinEH::EncodingType WinEHEncodingType = WinEH::EncodingType::Invalid;
 338
 339   /// True if Dwarf2 output generally uses relocations for references to other
 340   /// .debug_* sections.
 341   bool DwarfUsesRelocationsAcrossSections = true;
 342
 343   /// True if DWARF FDE symbol reference relocations should be replaced by an
 344   /// absolute difference.
 345   bool DwarfFDESymbolsUseAbsDiff = false;
 346
 347   /// True if dwarf register numbers are printed instead of symbolic register
 348   /// names in .cfi_* directives.  Defaults to false.
 349   bool DwarfRegNumForCFI = false;
 350
 351   /// True if target uses parens to indicate the symbol variant instead of @.
 352   /// For example, foo(plt) instead of foo@plt.  Defaults to false.
 353   bool UseParensForSymbolVariant = false;
 354
 355   /// True if the target supports flags in ".loc" directive, false if only
 356   /// location is allowed.
 357   bool SupportsExtendedDwarfLocDirective = true;
 358
 359   //===--- Prologue State ----------------------------------------------===//
 360
 361   std::vector<MCCFIInstruction> InitialFrameState;
 362
 363   //===--- Integrated Assembler Information ----------------------------===//
 364
 365   /// Should we use the integrated assembler?
 366   /// The integrated assembler should be enabled by default (by the
 367   /// constructors) when failing to parse a valid piece of assembly (inline
 368   /// or otherwise) is considered a bug. It may then be overridden after
 369   /// construction (see LLVMTargetMachine::initAsmInfo()).
 370   bool UseIntegratedAssembler;
 371
 372   /// Preserve Comments in assembly
 373   bool PreserveAsmComments;
 374
 375   /// Compress DWARF debug sections. Defaults to no compression.
 376   DebugCompressionType CompressDebugSections = DebugCompressionType::None;
 377
 378   /// True if the integrated assembler should interpret 'a >> b' constant
 379   /// expressions as logical rather than arithmetic.
 380   bool UseLogicalShr = true;
 381
 382   // If true, emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL, on
 383   // X86_64 ELF.
 384   bool RelaxELFRelocations = true;
 385
 386   // If true, then the lexer and expression parser will support %neg(),
 387   // %hi(), and similar unary operators.
 388   bool HasMipsExpressions = false;
 389
 390 public:
 391   explicit MCAsmInfo();
 392   virtual ~MCAsmInfo();
 393
 394   /// Get the code pointer size in bytes.
 395   unsigned getCodePointerSize() const { return CodePointerSize; }
 396
 397   /// Get the callee-saved register stack slot
 398   /// size in bytes.
 399   unsigned getCalleeSaveStackSlotSize() const {
 400     return CalleeSaveStackSlotSize;
 401   }
 402
 403   /// True if the target is little endian.
 404   bool isLittleEndian() const { return IsLittleEndian; }
 405
 406   /// True if target stack grow up.
 407   bool isStackGrowthDirectionUp() const { return StackGrowsUp; }
 408
 409   bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; }
 410
 411   // Data directive accessors.
 412
 413   const char *getData8bitsDirective() const { return Data8bitsDirective; }
 414   const char *getData16bitsDirective() const { return Data16bitsDirective; }
 415   const char *getData32bitsDirective() const { return Data32bitsDirective; }
 416   const char *getData64bitsDirective() const { return Data64bitsDirective; }
 417   const char *getGPRel64Directive() const { return GPRel64Directive; }
 418   const char *getGPRel32Directive() const { return GPRel32Directive; }
 419   const char *getDTPRel64Directive() const { return DTPRel64Directive; }
 420   const char *getDTPRel32Directive() const { return DTPRel32Directive; }
 421   const char *getTPRel64Directive() const { return TPRel64Directive; }
 422   const char *getTPRel32Directive() const { return TPRel32Directive; }
 423
 424   /// Targets can implement this method to specify a section to switch to if the
 425   /// translation unit doesn't have any trampolines that require an executable
 426   /// stack.
 427   virtual MCSection *getNonexecutableStackSection(MCContext &Ctx) const {
 428     return nullptr;
 429   }
 430
 431   /// True if the section is atomized using the symbols in it.
 432   /// This is false if the section is not atomized at all (most ELF sections) or
 433   /// if it is atomized based on its contents (MachO' __TEXT,__cstring for
 434   /// example).
 435   virtual bool isSectionAtomizableBySymbols(const MCSection &Section) const;
 436
 437   virtual const MCExpr *getExprForPersonalitySymbol(const MCSymbol *Sym,
 438                                                     unsigned Encoding,
 439                                                     MCStreamer &Streamer) const;
 440
 441   virtual const MCExpr *getExprForFDESymbol(const MCSymbol *Sym,
 442                                             unsigned Encoding,
 443                                             MCStreamer &Streamer) const;
 444
 445   /// Return true if the identifier \p Name does not need quotes to be
 446   /// syntactically correct.
 447   virtual bool isValidUnquotedName(StringRef Name) const;
 448
 449   /// Return true if the .section directive should be omitted when
 450   /// emitting \p SectionName.  For example:
 451   ///
 452   /// shouldOmitSectionDirective(".text")
 453   ///
 454   /// returns false => .section .text,#alloc,#execinstr
 455   /// returns true  => .text
 456   virtual bool shouldOmitSectionDirective(StringRef SectionName) const;
 457
 458   bool usesSunStyleELFSectionSwitchSyntax() const {
 459     return SunStyleELFSectionSwitchSyntax;
 460   }
 461
 462   bool usesELFSectionDirectiveForBSS() const {
 463     return UsesELFSectionDirectiveForBSS;
 464   }
 465
 466   bool needsDwarfSectionOffsetDirective() const {
 467     return NeedsDwarfSectionOffsetDirective;
 468   }
 469
 470   // Accessors.
 471
 472   bool hasMachoZeroFillDirective() const { return HasMachoZeroFillDirective; }
 473   bool hasMachoTBSSDirective() const { return HasMachoTBSSDirective; }
 474   bool hasCOFFAssociativeComdats() const { return HasCOFFAssociativeComdats; }
 475   bool hasCOFFComdatConstants() const { return HasCOFFComdatConstants; }
 476   unsigned getMaxInstLength() const { return MaxInstLength; }
 477   unsigned getMinInstAlignment() const { return MinInstAlignment; }
 478   bool getDollarIsPC() const { return DollarIsPC; }
 479   const char *getSeparatorString() const { return SeparatorString; }
 480
 481   /// This indicates the column (zero-based) at which asm comments should be
 482   /// printed.
 483   unsigned getCommentColumn() const { return 40; }
 484
 485   StringRef getCommentString() const { return CommentString; }
 486   const char *getLabelSuffix() const { return LabelSuffix; }
 487
 488   bool useAssignmentForEHBegin() const { return UseAssignmentForEHBegin; }
 489   bool needsLocalForSize() const { return NeedsLocalForSize; }
 490   StringRef getPrivateGlobalPrefix() const { return PrivateGlobalPrefix; }
 491   StringRef getPrivateLabelPrefix() const { return PrivateLabelPrefix; }
 492
 493   bool hasLinkerPrivateGlobalPrefix() const {
 494     return !LinkerPrivateGlobalPrefix.empty();
 495   }
 496
 497   StringRef getLinkerPrivateGlobalPrefix() const {
 498     if (hasLinkerPrivateGlobalPrefix())
 499       return LinkerPrivateGlobalPrefix;
 500     return getPrivateGlobalPrefix();
 501   }
 502
 503   const char *getInlineAsmStart() const { return InlineAsmStart; }
 504   const char *getInlineAsmEnd() const { return InlineAsmEnd; }
 505   const char *getCode16Directive() const { return Code16Directive; }
 506   const char *getCode32Directive() const { return Code32Directive; }
 507   const char *getCode64Directive() const { return Code64Directive; }
 508   unsigned getAssemblerDialect() const { return AssemblerDialect; }
 509   bool doesAllowAtInName() const { return AllowAtInName; }
 510   bool supportsNameQuoting() const { return SupportsQuotedNames; }
 511
 512   bool doesSupportDataRegionDirectives() const {
 513     return UseDataRegionDirectives;
 514   }
 515
 516   const char *getZeroDirective() const { return ZeroDirective; }
 517   const char *getAsciiDirective() const { return AsciiDirective; }
 518   const char *getAscizDirective() const { return AscizDirective; }
 519   bool getAlignmentIsInBytes() const { return AlignmentIsInBytes; }
 520   unsigned getTextAlignFillValue() const { return TextAlignFillValue; }
 521   const char *getGlobalDirective() const { return GlobalDirective; }
 522
 523   bool doesSetDirectiveSuppressReloc() const {
 524     return SetDirectiveSuppressesReloc;
 525   }
 526
 527   bool hasAggressiveSymbolFolding() const { return HasAggressiveSymbolFolding; }
 528
 529   bool getCOMMDirectiveAlignmentIsInBytes() const {
 530     return COMMDirectiveAlignmentIsInBytes;
 531   }
 532
 533   LCOMM::LCOMMType getLCOMMDirectiveAlignmentType() const {
 534     return LCOMMDirectiveAlignmentType;
 535   }
 536
 537   bool hasFunctionAlignment() const { return HasFunctionAlignment; }
 538   bool hasDotTypeDotSizeDirective() const { return HasDotTypeDotSizeDirective; }
 539   bool hasSingleParameterDotFile() const { return HasSingleParameterDotFile; }
 540   bool hasIdentDirective() const { return HasIdentDirective; }
 541   bool hasNoDeadStrip() const { return HasNoDeadStrip; }
 542   bool hasAltEntry() const { return HasAltEntry; }
 543   const char *getWeakDirective() const { return WeakDirective; }
 544   const char *getWeakRefDirective() const { return WeakRefDirective; }
 545   bool hasWeakDefDirective() const { return HasWeakDefDirective; }
 546
 547   bool hasWeakDefCanBeHiddenDirective() const {
 548     return HasWeakDefCanBeHiddenDirective;
 549   }
 550
 551   bool hasLinkOnceDirective() const { return HasLinkOnceDirective; }
 552
 553   MCSymbolAttr getHiddenVisibilityAttr() const { return HiddenVisibilityAttr; }
 554
 555   MCSymbolAttr getHiddenDeclarationVisibilityAttr() const {
 556     return HiddenDeclarationVisibilityAttr;
 557   }
 558
 559   MCSymbolAttr getProtectedVisibilityAttr() const {
 560     return ProtectedVisibilityAttr;
 561   }
 562
 563   bool doesSupportDebugInformation() const { return SupportsDebugInformation; }
 564
 565   bool doesSupportExceptionHandling() const {
 566     return ExceptionsType != ExceptionHandling::None;
 567   }
 568
 569   ExceptionHandling getExceptionHandlingType() const { return ExceptionsType; }
 570   WinEH::EncodingType getWinEHEncodingType() const { return WinEHEncodingType; }
 571
 572   void setExceptionsType(ExceptionHandling EH) {
 573     ExceptionsType = EH;
 574   }
 575
 576   /// Returns true if the exception handling method for the platform uses call
 577   /// frame information to unwind.
 578   bool usesCFIForEH() const {
 579     return (ExceptionsType == ExceptionHandling::DwarfCFI ||
 580             ExceptionsType == ExceptionHandling::ARM || usesWindowsCFI());
 581   }
 582
 583   bool usesWindowsCFI() const {
 584     return ExceptionsType == ExceptionHandling::WinEH &&
 585            (WinEHEncodingType != WinEH::EncodingType::Invalid &&
 586             WinEHEncodingType != WinEH::EncodingType::X86);
 587   }
 588
 589   bool doesDwarfUseRelocationsAcrossSections() const {
 590     return DwarfUsesRelocationsAcrossSections;
 591   }
 592
 593   bool doDwarfFDESymbolsUseAbsDiff() const { return DwarfFDESymbolsUseAbsDiff; }
 594   bool useDwarfRegNumForCFI() const { return DwarfRegNumForCFI; }
 595   bool useParensForSymbolVariant() const { return UseParensForSymbolVariant; }
 596   bool supportsExtendedDwarfLocDirective() const {
 597     return SupportsExtendedDwarfLocDirective;
 598   }
 599
 600   void addInitialFrameState(const MCCFIInstruction &Inst) {
 601     InitialFrameState.push_back(Inst);
 602   }
 603
 604   const std::vector<MCCFIInstruction> &getInitialFrameState() const {
 605     return InitialFrameState;
 606   }
 607
 608   /// Return true if assembly (inline or otherwise) should be parsed.
 609   bool useIntegratedAssembler() const { return UseIntegratedAssembler; }
 610
 611   /// Set whether assembly (inline or otherwise) should be parsed.
 612   virtual void setUseIntegratedAssembler(bool Value) {
 613     UseIntegratedAssembler = Value;
 614   }
 615
 616   /// Return true if assembly (inline or otherwise) should be parsed.
 617   bool preserveAsmComments() const { return PreserveAsmComments; }
 618
 619   /// Set whether assembly (inline or otherwise) should be parsed.
 620   virtual void setPreserveAsmComments(bool Value) {
 621     PreserveAsmComments = Value;
 622   }
 623
 624   DebugCompressionType compressDebugSections() const {
 625     return CompressDebugSections;
 626   }
 627
 628   void setCompressDebugSections(DebugCompressionType CompressDebugSections) {
 629     this->CompressDebugSections = CompressDebugSections;
 630   }
 631
 632   bool shouldUseLogicalShr() const { return UseLogicalShr; }
 633
 634   bool canRelaxRelocations() const { return RelaxELFRelocations; }
 635   void setRelaxELFRelocations(bool V) { RelaxELFRelocations = V; }
 636   bool hasMipsExpressions() const { return HasMipsExpressions; }
 637 };
 638
 639 } // end namespace llvm
 640
 641 #endif // LLVM_MC_MCASMINFO_H