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/MCTargetOptions.h" 21 #include <vector> 22 23 namespace llvm { 24 25 class MCContext; 26 class MCCFIInstruction; 27 class MCExpr; 28 class MCSection; 29 class MCStreamer; 30 class MCSubtargetInfo; 31 class MCSymbol; 32 33 namespace WinEH { 34 35 enum class EncodingType { 36 Invalid, /// Invalid 37 Alpha, /// Windows Alpha 38 Alpha64, /// Windows AXP64 39 ARM, /// Windows NT (Windows on ARM) 40 CE, /// Windows CE ARM, PowerPC, SH3, SH4 41 Itanium, /// Windows x64, Windows Itanium (IA-64) 42 X86, /// Windows x86, uses no CFI, just EH tables 43 MIPS = Alpha, 44 }; 45 46 } // end namespace WinEH 47 48 namespace LCOMM { 49 50 enum LCOMMType { NoAlignment, ByteAlignment, Log2Alignment }; 51 52 } // end namespace LCOMM 53 54 /// This class is intended to be used as a base class for asm 55 /// properties and features specific to the target. 56 class MCAsmInfo { 57 protected: 58 //===------------------------------------------------------------------===// 59 // Properties to be set by the target writer, used to configure asm printer. 60 // 61 62 /// Code pointer size in bytes. Default is 4. 63 unsigned CodePointerSize = 4; 64 65 /// Size of the stack slot reserved for callee-saved registers, in bytes. 66 /// Default is same as pointer size. 67 unsigned CalleeSaveStackSlotSize = 4; 68 69 /// True if target is little endian. Default is true. 70 bool IsLittleEndian = true; 71 72 /// True if target stack grow up. Default is false. 73 bool StackGrowsUp = false; 74 75 /// True if this target has the MachO .subsections_via_symbols directive. 76 /// Default is false. 77 bool HasSubsectionsViaSymbols = false; 78 79 /// True if this is a MachO target that supports the macho-specific .zerofill 80 /// directive for emitting BSS Symbols. Default is false. 81 bool HasMachoZeroFillDirective = false; 82 83 /// True if this is a MachO target that supports the macho-specific .tbss 84 /// directive for emitting thread local BSS Symbols. Default is false. 85 bool HasMachoTBSSDirective = false; 86 87 /// True if this is a non-GNU COFF target. The COFF port of the GNU linker 88 /// doesn't handle associative comdats in the way that we would like to use 89 /// them. 90 bool HasCOFFAssociativeComdats = false; 91 92 /// True if this is a non-GNU COFF target. For GNU targets, we don't generate 93 /// constants into comdat sections. 94 bool HasCOFFComdatConstants = false; 95 96 /// True if this is an XCOFF target that supports visibility attributes as 97 /// part of .global, .weak, .extern, and .comm. Default is false. 98 bool HasVisibilityOnlyWithLinkage = false; 99 100 /// This is the maximum possible length of an instruction, which is needed to 101 /// compute the size of an inline asm. Defaults to 4. 102 unsigned MaxInstLength = 4; 103 104 /// Every possible instruction length is a multiple of this value. Factored 105 /// out in .debug_frame and .debug_line. Defaults to 1. 106 unsigned MinInstAlignment = 1; 107 108 /// The '$' token, when not referencing an identifier or constant, refers to 109 /// the current PC. Defaults to false. 110 bool DollarIsPC = false; 111 112 /// This string, if specified, is used to separate instructions from each 113 /// other when on the same line. Defaults to ';' 114 const char *SeparatorString; 115 116 /// This indicates the comment character used by the assembler. Defaults to 117 /// "#" 118 StringRef CommentString; 119 120 /// This is appended to emitted labels. Defaults to ":" 121 const char *LabelSuffix; 122 123 // Print the EH begin symbol with an assignment. Defaults to false. 124 bool UseAssignmentForEHBegin = false; 125 126 // Do we need to create a local symbol for .size? 127 bool NeedsLocalForSize = false; 128 129 /// This prefix is used for globals like constant pool entries that are 130 /// completely private to the .s file and should not have names in the .o 131 /// file. Defaults to "L" 132 StringRef PrivateGlobalPrefix; 133 134 /// This prefix is used for labels for basic blocks. Defaults to the same as 135 /// PrivateGlobalPrefix. 136 StringRef PrivateLabelPrefix; 137 138 /// This prefix is used for symbols that should be passed through the 139 /// assembler but be removed by the linker. This is 'l' on Darwin, currently 140 /// used for some ObjC metadata. The default of "" meast that for this system 141 /// a plain private symbol should be used. Defaults to "". 142 StringRef LinkerPrivateGlobalPrefix; 143 144 /// If these are nonempty, they contain a directive to emit before and after 145 /// an inline assembly statement. Defaults to "#APP\n", "#NO_APP\n" 146 const char *InlineAsmStart; 147 const char *InlineAsmEnd; 148 149 /// These are assembly directives that tells the assembler to interpret the 150 /// following instructions differently. Defaults to ".code16", ".code32", 151 /// ".code64". 152 const char *Code16Directive; 153 const char *Code32Directive; 154 const char *Code64Directive; 155 156 /// Which dialect of an assembler variant to use. Defaults to 0 157 unsigned AssemblerDialect = 0; 158 159 /// This is true if the assembler allows @ characters in symbol names. 160 /// Defaults to false. 161 bool AllowAtInName = false; 162 163 /// This is true if the assembler allows $ @ ? characters at the start of 164 /// symbol names. Defaults to false. 165 bool AllowSymbolAtNameStart = false; 166 167 /// If this is true, symbol names with invalid characters will be printed in 168 /// quotes. 169 bool SupportsQuotedNames = true; 170 171 /// This is true if data region markers should be printed as 172 /// ".data_region/.end_data_region" directives. If false, use "$d/$a" labels 173 /// instead. 174 bool UseDataRegionDirectives = false; 175 176 /// True if .align is to be used for alignment. Only power-of-two 177 /// alignment is supported. 178 bool UseDotAlignForAlignment = false; 179 180 //===--- Data Emission Directives -------------------------------------===// 181 182 /// This should be set to the directive used to get some number of zero (and 183 /// non-zero if supported by the directive) bytes emitted to the current 184 /// section. Common cases are "\t.zero\t" and "\t.space\t". Defaults to 185 /// "\t.zero\t" 186 const char *ZeroDirective; 187 188 /// This should be set to true if the zero directive supports a value to emit 189 /// other than zero. If this is set to false, the Data*bitsDirective's will be 190 /// used to emit these bytes. Defaults to true. 191 bool ZeroDirectiveSupportsNonZeroValue = true; 192 193 /// This directive allows emission of an ascii string with the standard C 194 /// escape characters embedded into it. If a target doesn't support this, it 195 /// can be set to null. Defaults to "\t.ascii\t" 196 const char *AsciiDirective; 197 198 /// If not null, this allows for special handling of zero terminated strings 199 /// on this target. This is commonly supported as ".asciz". If a target 200 /// doesn't support this, it can be set to null. Defaults to "\t.asciz\t" 201 const char *AscizDirective; 202 203 /// These directives are used to output some unit of integer data to the 204 /// current section. If a data directive is set to null, smaller data 205 /// directives will be used to emit the large sizes. Defaults to "\t.byte\t", 206 /// "\t.short\t", "\t.long\t", "\t.quad\t" 207 const char *Data8bitsDirective; 208 const char *Data16bitsDirective; 209 const char *Data32bitsDirective; 210 const char *Data64bitsDirective; 211 212 /// If non-null, a directive that is used to emit a word which should be 213 /// relocated as a 64-bit GP-relative offset, e.g. .gpdword on Mips. Defaults 214 /// to nullptr. 215 const char *GPRel64Directive = nullptr; 216 217 /// If non-null, a directive that is used to emit a word which should be 218 /// relocated as a 32-bit GP-relative offset, e.g. .gpword on Mips or .gprel32 219 /// on Alpha. Defaults to nullptr. 220 const char *GPRel32Directive = nullptr; 221 222 /// If non-null, directives that are used to emit a word/dword which should 223 /// be relocated as a 32/64-bit DTP/TP-relative offset, e.g. .dtprelword/ 224 /// .dtpreldword/.tprelword/.tpreldword on Mips. 225 const char *DTPRel32Directive = nullptr; 226 const char *DTPRel64Directive = nullptr; 227 const char *TPRel32Directive = nullptr; 228 const char *TPRel64Directive = nullptr; 229 230 /// This is true if this target uses "Sun Style" syntax for section switching 231 /// ("#alloc,#write" etc) instead of the normal ELF syntax (,"a,w") in 232 /// .section directives. Defaults to false. 233 bool SunStyleELFSectionSwitchSyntax = false; 234 235 /// This is true if this target uses ELF '.section' directive before the 236 /// '.bss' one. It's used for PPC/Linux which doesn't support the '.bss' 237 /// directive only. Defaults to false. 238 bool UsesELFSectionDirectiveForBSS = false; 239 240 bool NeedsDwarfSectionOffsetDirective = false; 241 242 //===--- Alignment Information ----------------------------------------===// 243 244 /// If this is true (the default) then the asmprinter emits ".align N" 245 /// directives, where N is the number of bytes to align to. Otherwise, it 246 /// emits ".align log2(N)", e.g. 3 to align to an 8 byte boundary. Defaults 247 /// to true. 248 bool AlignmentIsInBytes = true; 249 250 /// If non-zero, this is used to fill the executable space created as the 251 /// result of a alignment directive. Defaults to 0 252 unsigned TextAlignFillValue = 0; 253 254 //===--- Global Variable Emission Directives --------------------------===// 255 256 /// This is the directive used to declare a global entity. Defaults to 257 /// ".globl". 258 const char *GlobalDirective; 259 260 /// True if the expression 261 /// .long f - g 262 /// uses a relocation but it can be suppressed by writing 263 /// a = f - g 264 /// .long a 265 bool SetDirectiveSuppressesReloc = false; 266 267 /// False if the assembler requires that we use 268 /// \code 269 /// Lc = a - b 270 /// .long Lc 271 /// \endcode 272 // 273 /// instead of 274 // 275 /// \code 276 /// .long a - b 277 /// \endcode 278 /// 279 /// Defaults to true. 280 bool HasAggressiveSymbolFolding = true; 281 282 /// True is .comm's and .lcomms optional alignment is to be specified in bytes 283 /// instead of log2(n). Defaults to true. 284 bool COMMDirectiveAlignmentIsInBytes = true; 285 286 /// Describes if the .lcomm directive for the target supports an alignment 287 /// argument and how it is interpreted. Defaults to NoAlignment. 288 LCOMM::LCOMMType LCOMMDirectiveAlignmentType = LCOMM::NoAlignment; 289 290 // True if the target allows .align directives on functions. This is true for 291 // most targets, so defaults to true. 292 bool HasFunctionAlignment = true; 293 294 /// True if the target has .type and .size directives, this is true for most 295 /// ELF targets. Defaults to true. 296 bool HasDotTypeDotSizeDirective = true; 297 298 /// True if the target has a single parameter .file directive, this is true 299 /// for ELF targets. Defaults to true. 300 bool HasSingleParameterDotFile = true; 301 302 /// True if the target has a .ident directive, this is true for ELF targets. 303 /// Defaults to false. 304 bool HasIdentDirective = false; 305 306 /// True if this target supports the MachO .no_dead_strip directive. Defaults 307 /// to false. 308 bool HasNoDeadStrip = false; 309 310 /// True if this target supports the MachO .alt_entry directive. Defaults to 311 /// false. 312 bool HasAltEntry = false; 313 314 /// Used to declare a global as being a weak symbol. Defaults to ".weak". 315 const char *WeakDirective; 316 317 /// This directive, if non-null, is used to declare a global as being a weak 318 /// undefined symbol. Defaults to nullptr. 319 const char *WeakRefDirective = nullptr; 320 321 /// True if we have a directive to declare a global as being a weak defined 322 /// symbol. Defaults to false. 323 bool HasWeakDefDirective = false; 324 325 /// True if we have a directive to declare a global as being a weak defined 326 /// symbol that can be hidden (unexported). Defaults to false. 327 bool HasWeakDefCanBeHiddenDirective = false; 328 329 /// True if we should mark symbols as global instead of weak, for 330 /// weak*/linkonce*, if the symbol has a comdat. 331 /// Defaults to false. 332 bool AvoidWeakIfComdat = false; 333 334 /// This attribute, if not MCSA_Invalid, is used to declare a symbol as having 335 /// hidden visibility. Defaults to MCSA_Hidden. 336 MCSymbolAttr HiddenVisibilityAttr = MCSA_Hidden; 337 338 /// This attribute, if not MCSA_Invalid, is used to declare an undefined 339 /// symbol as having hidden visibility. Defaults to MCSA_Hidden. 340 MCSymbolAttr HiddenDeclarationVisibilityAttr = MCSA_Hidden; 341 342 /// This attribute, if not MCSA_Invalid, is used to declare a symbol as having 343 /// protected visibility. Defaults to MCSA_Protected 344 MCSymbolAttr ProtectedVisibilityAttr = MCSA_Protected; 345 346 //===--- Dwarf Emission Directives -----------------------------------===// 347 348 /// True if target supports emission of debugging information. Defaults to 349 /// false. 350 bool SupportsDebugInformation = false; 351 352 /// Exception handling format for the target. Defaults to None. 353 ExceptionHandling ExceptionsType = ExceptionHandling::None; 354 355 /// Windows exception handling data (.pdata) encoding. Defaults to Invalid. 356 WinEH::EncodingType WinEHEncodingType = WinEH::EncodingType::Invalid; 357 358 /// True if Dwarf2 output generally uses relocations for references to other 359 /// .debug_* sections. 360 bool DwarfUsesRelocationsAcrossSections = true; 361 362 /// True if DWARF FDE symbol reference relocations should be replaced by an 363 /// absolute difference. 364 bool DwarfFDESymbolsUseAbsDiff = false; 365 366 /// True if dwarf register numbers are printed instead of symbolic register 367 /// names in .cfi_* directives. Defaults to false. 368 bool DwarfRegNumForCFI = false; 369 370 /// True if target uses parens to indicate the symbol variant instead of @. 371 /// For example, foo(plt) instead of foo@plt. Defaults to false. 372 bool UseParensForSymbolVariant = false; 373 374 /// True if the target supports flags in ".loc" directive, false if only 375 /// location is allowed. 376 bool SupportsExtendedDwarfLocDirective = true; 377 378 //===--- Prologue State ----------------------------------------------===// 379 380 std::vector<MCCFIInstruction> InitialFrameState; 381 382 //===--- Integrated Assembler Information ----------------------------===// 383 384 /// Should we use the integrated assembler? 385 /// The integrated assembler should be enabled by default (by the 386 /// constructors) when failing to parse a valid piece of assembly (inline 387 /// or otherwise) is considered a bug. It may then be overridden after 388 /// construction (see LLVMTargetMachine::initAsmInfo()). 389 bool UseIntegratedAssembler; 390 391 /// Preserve Comments in assembly 392 bool PreserveAsmComments; 393 394 /// Compress DWARF debug sections. Defaults to no compression. 395 DebugCompressionType CompressDebugSections = DebugCompressionType::None; 396 397 /// True if the integrated assembler should interpret 'a >> b' constant 398 /// expressions as logical rather than arithmetic. 399 bool UseLogicalShr = true; 400 401 // If true, emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL, on 402 // X86_64 ELF. 403 bool RelaxELFRelocations = true; 404 405 // If true, then the lexer and expression parser will support %neg(), 406 // %hi(), and similar unary operators. 407 bool HasMipsExpressions = false; 408 409 // If true, emit function descriptor symbol on AIX. 410 bool NeedsFunctionDescriptors = false; 411 412 public: 413 explicit MCAsmInfo(); 414 virtual ~MCAsmInfo(); 415 416 /// Get the code pointer size in bytes. getCodePointerSize()417 unsigned getCodePointerSize() const { return CodePointerSize; } 418 419 /// Get the callee-saved register stack slot 420 /// size in bytes. getCalleeSaveStackSlotSize()421 unsigned getCalleeSaveStackSlotSize() const { 422 return CalleeSaveStackSlotSize; 423 } 424 425 /// True if the target is little endian. isLittleEndian()426 bool isLittleEndian() const { return IsLittleEndian; } 427 428 /// True if target stack grow up. isStackGrowthDirectionUp()429 bool isStackGrowthDirectionUp() const { return StackGrowsUp; } 430 hasSubsectionsViaSymbols()431 bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; } 432 433 // Data directive accessors. 434 getData8bitsDirective()435 const char *getData8bitsDirective() const { return Data8bitsDirective; } getData16bitsDirective()436 const char *getData16bitsDirective() const { return Data16bitsDirective; } getData32bitsDirective()437 const char *getData32bitsDirective() const { return Data32bitsDirective; } getData64bitsDirective()438 const char *getData64bitsDirective() const { return Data64bitsDirective; } getGPRel64Directive()439 const char *getGPRel64Directive() const { return GPRel64Directive; } getGPRel32Directive()440 const char *getGPRel32Directive() const { return GPRel32Directive; } getDTPRel64Directive()441 const char *getDTPRel64Directive() const { return DTPRel64Directive; } getDTPRel32Directive()442 const char *getDTPRel32Directive() const { return DTPRel32Directive; } getTPRel64Directive()443 const char *getTPRel64Directive() const { return TPRel64Directive; } getTPRel32Directive()444 const char *getTPRel32Directive() const { return TPRel32Directive; } 445 446 /// Targets can implement this method to specify a section to switch to if the 447 /// translation unit doesn't have any trampolines that require an executable 448 /// stack. getNonexecutableStackSection(MCContext & Ctx)449 virtual MCSection *getNonexecutableStackSection(MCContext &Ctx) const { 450 return nullptr; 451 } 452 453 /// True if the section is atomized using the symbols in it. 454 /// This is false if the section is not atomized at all (most ELF sections) or 455 /// if it is atomized based on its contents (MachO' __TEXT,__cstring for 456 /// example). 457 virtual bool isSectionAtomizableBySymbols(const MCSection &Section) const; 458 459 virtual const MCExpr *getExprForPersonalitySymbol(const MCSymbol *Sym, 460 unsigned Encoding, 461 MCStreamer &Streamer) const; 462 463 virtual const MCExpr *getExprForFDESymbol(const MCSymbol *Sym, 464 unsigned Encoding, 465 MCStreamer &Streamer) const; 466 467 /// Return true if C is an acceptable character inside a symbol name. 468 virtual bool isAcceptableChar(char C) const; 469 470 /// Return true if the identifier \p Name does not need quotes to be 471 /// syntactically correct. 472 virtual bool isValidUnquotedName(StringRef Name) const; 473 474 /// Return true if the .section directive should be omitted when 475 /// emitting \p SectionName. For example: 476 /// 477 /// shouldOmitSectionDirective(".text") 478 /// 479 /// returns false => .section .text,#alloc,#execinstr 480 /// returns true => .text 481 virtual bool shouldOmitSectionDirective(StringRef SectionName) const; 482 usesSunStyleELFSectionSwitchSyntax()483 bool usesSunStyleELFSectionSwitchSyntax() const { 484 return SunStyleELFSectionSwitchSyntax; 485 } 486 usesELFSectionDirectiveForBSS()487 bool usesELFSectionDirectiveForBSS() const { 488 return UsesELFSectionDirectiveForBSS; 489 } 490 needsDwarfSectionOffsetDirective()491 bool needsDwarfSectionOffsetDirective() const { 492 return NeedsDwarfSectionOffsetDirective; 493 } 494 495 // Accessors. 496 hasMachoZeroFillDirective()497 bool hasMachoZeroFillDirective() const { return HasMachoZeroFillDirective; } hasMachoTBSSDirective()498 bool hasMachoTBSSDirective() const { return HasMachoTBSSDirective; } hasCOFFAssociativeComdats()499 bool hasCOFFAssociativeComdats() const { return HasCOFFAssociativeComdats; } hasCOFFComdatConstants()500 bool hasCOFFComdatConstants() const { return HasCOFFComdatConstants; } hasVisibilityOnlyWithLinkage()501 bool hasVisibilityOnlyWithLinkage() const { 502 return HasVisibilityOnlyWithLinkage; 503 } 504 505 /// Returns the maximum possible encoded instruction size in bytes. If \p STI 506 /// is null, this should be the maximum size for any subtarget. 507 virtual unsigned getMaxInstLength(const MCSubtargetInfo *STI = nullptr) const { 508 return MaxInstLength; 509 } 510 getMinInstAlignment()511 unsigned getMinInstAlignment() const { return MinInstAlignment; } getDollarIsPC()512 bool getDollarIsPC() const { return DollarIsPC; } getSeparatorString()513 const char *getSeparatorString() const { return SeparatorString; } 514 515 /// This indicates the column (zero-based) at which asm comments should be 516 /// printed. getCommentColumn()517 unsigned getCommentColumn() const { return 40; } 518 getCommentString()519 StringRef getCommentString() const { return CommentString; } getLabelSuffix()520 const char *getLabelSuffix() const { return LabelSuffix; } 521 useAssignmentForEHBegin()522 bool useAssignmentForEHBegin() const { return UseAssignmentForEHBegin; } needsLocalForSize()523 bool needsLocalForSize() const { return NeedsLocalForSize; } getPrivateGlobalPrefix()524 StringRef getPrivateGlobalPrefix() const { return PrivateGlobalPrefix; } getPrivateLabelPrefix()525 StringRef getPrivateLabelPrefix() const { return PrivateLabelPrefix; } 526 hasLinkerPrivateGlobalPrefix()527 bool hasLinkerPrivateGlobalPrefix() const { 528 return !LinkerPrivateGlobalPrefix.empty(); 529 } 530 getLinkerPrivateGlobalPrefix()531 StringRef getLinkerPrivateGlobalPrefix() const { 532 if (hasLinkerPrivateGlobalPrefix()) 533 return LinkerPrivateGlobalPrefix; 534 return getPrivateGlobalPrefix(); 535 } 536 getInlineAsmStart()537 const char *getInlineAsmStart() const { return InlineAsmStart; } getInlineAsmEnd()538 const char *getInlineAsmEnd() const { return InlineAsmEnd; } getCode16Directive()539 const char *getCode16Directive() const { return Code16Directive; } getCode32Directive()540 const char *getCode32Directive() const { return Code32Directive; } getCode64Directive()541 const char *getCode64Directive() const { return Code64Directive; } getAssemblerDialect()542 unsigned getAssemblerDialect() const { return AssemblerDialect; } doesAllowAtInName()543 bool doesAllowAtInName() const { return AllowAtInName; } doesAllowSymbolAtNameStart()544 bool doesAllowSymbolAtNameStart() const { return AllowSymbolAtNameStart; } supportsNameQuoting()545 bool supportsNameQuoting() const { return SupportsQuotedNames; } 546 doesSupportDataRegionDirectives()547 bool doesSupportDataRegionDirectives() const { 548 return UseDataRegionDirectives; 549 } 550 useDotAlignForAlignment()551 bool useDotAlignForAlignment() const { 552 return UseDotAlignForAlignment; 553 } 554 getZeroDirective()555 const char *getZeroDirective() const { return ZeroDirective; } doesZeroDirectiveSupportNonZeroValue()556 bool doesZeroDirectiveSupportNonZeroValue() const { 557 return ZeroDirectiveSupportsNonZeroValue; 558 } getAsciiDirective()559 const char *getAsciiDirective() const { return AsciiDirective; } getAscizDirective()560 const char *getAscizDirective() const { return AscizDirective; } getAlignmentIsInBytes()561 bool getAlignmentIsInBytes() const { return AlignmentIsInBytes; } getTextAlignFillValue()562 unsigned getTextAlignFillValue() const { return TextAlignFillValue; } getGlobalDirective()563 const char *getGlobalDirective() const { return GlobalDirective; } 564 doesSetDirectiveSuppressReloc()565 bool doesSetDirectiveSuppressReloc() const { 566 return SetDirectiveSuppressesReloc; 567 } 568 hasAggressiveSymbolFolding()569 bool hasAggressiveSymbolFolding() const { return HasAggressiveSymbolFolding; } 570 getCOMMDirectiveAlignmentIsInBytes()571 bool getCOMMDirectiveAlignmentIsInBytes() const { 572 return COMMDirectiveAlignmentIsInBytes; 573 } 574 getLCOMMDirectiveAlignmentType()575 LCOMM::LCOMMType getLCOMMDirectiveAlignmentType() const { 576 return LCOMMDirectiveAlignmentType; 577 } 578 hasFunctionAlignment()579 bool hasFunctionAlignment() const { return HasFunctionAlignment; } hasDotTypeDotSizeDirective()580 bool hasDotTypeDotSizeDirective() const { return HasDotTypeDotSizeDirective; } hasSingleParameterDotFile()581 bool hasSingleParameterDotFile() const { return HasSingleParameterDotFile; } hasIdentDirective()582 bool hasIdentDirective() const { return HasIdentDirective; } hasNoDeadStrip()583 bool hasNoDeadStrip() const { return HasNoDeadStrip; } hasAltEntry()584 bool hasAltEntry() const { return HasAltEntry; } getWeakDirective()585 const char *getWeakDirective() const { return WeakDirective; } getWeakRefDirective()586 const char *getWeakRefDirective() const { return WeakRefDirective; } hasWeakDefDirective()587 bool hasWeakDefDirective() const { return HasWeakDefDirective; } 588 hasWeakDefCanBeHiddenDirective()589 bool hasWeakDefCanBeHiddenDirective() const { 590 return HasWeakDefCanBeHiddenDirective; 591 } 592 avoidWeakIfComdat()593 bool avoidWeakIfComdat() const { return AvoidWeakIfComdat; } 594 getHiddenVisibilityAttr()595 MCSymbolAttr getHiddenVisibilityAttr() const { return HiddenVisibilityAttr; } 596 getHiddenDeclarationVisibilityAttr()597 MCSymbolAttr getHiddenDeclarationVisibilityAttr() const { 598 return HiddenDeclarationVisibilityAttr; 599 } 600 getProtectedVisibilityAttr()601 MCSymbolAttr getProtectedVisibilityAttr() const { 602 return ProtectedVisibilityAttr; 603 } 604 doesSupportDebugInformation()605 bool doesSupportDebugInformation() const { return SupportsDebugInformation; } 606 doesSupportExceptionHandling()607 bool doesSupportExceptionHandling() const { 608 return ExceptionsType != ExceptionHandling::None; 609 } 610 getExceptionHandlingType()611 ExceptionHandling getExceptionHandlingType() const { return ExceptionsType; } getWinEHEncodingType()612 WinEH::EncodingType getWinEHEncodingType() const { return WinEHEncodingType; } 613 setExceptionsType(ExceptionHandling EH)614 void setExceptionsType(ExceptionHandling EH) { 615 ExceptionsType = EH; 616 } 617 618 /// Returns true if the exception handling method for the platform uses call 619 /// frame information to unwind. usesCFIForEH()620 bool usesCFIForEH() const { 621 return (ExceptionsType == ExceptionHandling::DwarfCFI || 622 ExceptionsType == ExceptionHandling::ARM || usesWindowsCFI()); 623 } 624 usesWindowsCFI()625 bool usesWindowsCFI() const { 626 return ExceptionsType == ExceptionHandling::WinEH && 627 (WinEHEncodingType != WinEH::EncodingType::Invalid && 628 WinEHEncodingType != WinEH::EncodingType::X86); 629 } 630 doesDwarfUseRelocationsAcrossSections()631 bool doesDwarfUseRelocationsAcrossSections() const { 632 return DwarfUsesRelocationsAcrossSections; 633 } 634 doDwarfFDESymbolsUseAbsDiff()635 bool doDwarfFDESymbolsUseAbsDiff() const { return DwarfFDESymbolsUseAbsDiff; } useDwarfRegNumForCFI()636 bool useDwarfRegNumForCFI() const { return DwarfRegNumForCFI; } useParensForSymbolVariant()637 bool useParensForSymbolVariant() const { return UseParensForSymbolVariant; } supportsExtendedDwarfLocDirective()638 bool supportsExtendedDwarfLocDirective() const { 639 return SupportsExtendedDwarfLocDirective; 640 } 641 642 void addInitialFrameState(const MCCFIInstruction &Inst); 643 getInitialFrameState()644 const std::vector<MCCFIInstruction> &getInitialFrameState() const { 645 return InitialFrameState; 646 } 647 648 /// Return true if assembly (inline or otherwise) should be parsed. useIntegratedAssembler()649 bool useIntegratedAssembler() const { return UseIntegratedAssembler; } 650 651 /// Set whether assembly (inline or otherwise) should be parsed. setUseIntegratedAssembler(bool Value)652 virtual void setUseIntegratedAssembler(bool Value) { 653 UseIntegratedAssembler = Value; 654 } 655 656 /// Return true if assembly (inline or otherwise) should be parsed. preserveAsmComments()657 bool preserveAsmComments() const { return PreserveAsmComments; } 658 659 /// Set whether assembly (inline or otherwise) should be parsed. setPreserveAsmComments(bool Value)660 virtual void setPreserveAsmComments(bool Value) { 661 PreserveAsmComments = Value; 662 } 663 compressDebugSections()664 DebugCompressionType compressDebugSections() const { 665 return CompressDebugSections; 666 } 667 setCompressDebugSections(DebugCompressionType CompressDebugSections)668 void setCompressDebugSections(DebugCompressionType CompressDebugSections) { 669 this->CompressDebugSections = CompressDebugSections; 670 } 671 shouldUseLogicalShr()672 bool shouldUseLogicalShr() const { return UseLogicalShr; } 673 canRelaxRelocations()674 bool canRelaxRelocations() const { return RelaxELFRelocations; } setRelaxELFRelocations(bool V)675 void setRelaxELFRelocations(bool V) { RelaxELFRelocations = V; } hasMipsExpressions()676 bool hasMipsExpressions() const { return HasMipsExpressions; } needsFunctionDescriptors()677 bool needsFunctionDescriptors() const { return NeedsFunctionDescriptors; } 678 }; 679 680 } // end namespace llvm 681 682 #endif // LLVM_MC_MCASMINFO_H 683