LLVM  7.0.0svn
MCAsmInfo.h
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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/ADT/StringRef.h"
20 #include "llvm/MC/MCDirectives.h"
21 #include "llvm/MC/MCDwarf.h"
23 #include <vector>
24 
25 namespace llvm {
26 
27 class MCContext;
28 class MCExpr;
29 class MCSection;
30 class MCStreamer;
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 
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  /// This is the maximum possible length of an instruction, which is needed to
88  /// compute the size of an inline asm. Defaults to 4.
89  unsigned MaxInstLength = 4;
90 
91  /// Every possible instruction length is a multiple of this value. Factored
92  /// out in .debug_frame and .debug_line. Defaults to 1.
93  unsigned MinInstAlignment = 1;
94 
95  /// The '$' token, when not referencing an identifier or constant, refers to
96  /// the current PC. Defaults to false.
97  bool DollarIsPC = false;
98 
99  /// This string, if specified, is used to separate instructions from each
100  /// other when on the same line. Defaults to ';'
101  const char *SeparatorString;
102 
103  /// This indicates the comment character used by the assembler. Defaults to
104  /// "#"
106 
107  /// This is appended to emitted labels. Defaults to ":"
108  const char *LabelSuffix;
109 
110  // Print the EH begin symbol with an assignment. Defaults to false.
111  bool UseAssignmentForEHBegin = false;
112 
113  // Do we need to create a local symbol for .size?
114  bool NeedsLocalForSize = false;
115 
116  /// This prefix is used for globals like constant pool entries that are
117  /// completely private to the .s file and should not have names in the .o
118  /// file. Defaults to "L"
120 
121  /// This prefix is used for labels for basic blocks. Defaults to the same as
122  /// PrivateGlobalPrefix.
124 
125  /// This prefix is used for symbols that should be passed through the
126  /// assembler but be removed by the linker. This is 'l' on Darwin, currently
127  /// used for some ObjC metadata. The default of "" meast that for this system
128  /// a plain private symbol should be used. Defaults to "".
130 
131  /// If these are nonempty, they contain a directive to emit before and after
132  /// an inline assembly statement. Defaults to "#APP\n", "#NO_APP\n"
133  const char *InlineAsmStart;
134  const char *InlineAsmEnd;
135 
136  /// These are assembly directives that tells the assembler to interpret the
137  /// following instructions differently. Defaults to ".code16", ".code32",
138  /// ".code64".
139  const char *Code16Directive;
140  const char *Code32Directive;
141  const char *Code64Directive;
142 
143  /// Which dialect of an assembler variant to use. Defaults to 0
144  unsigned AssemblerDialect = 0;
145 
146  /// This is true if the assembler allows @ characters in symbol names.
147  /// Defaults to false.
148  bool AllowAtInName = false;
149 
150  /// If this is true, symbol names with invalid characters will be printed in
151  /// quotes.
152  bool SupportsQuotedNames = true;
153 
154  /// This is true if data region markers should be printed as
155  /// ".data_region/.end_data_region" directives. If false, use "$d/$a" labels
156  /// instead.
157  bool UseDataRegionDirectives = false;
158 
159  //===--- Data Emission Directives -------------------------------------===//
160 
161  /// This should be set to the directive used to get some number of zero bytes
162  /// emitted to the current section. Common cases are "\t.zero\t" and
163  /// "\t.space\t". If this is set to null, the Data*bitsDirective's will be
164  /// used to emit zero bytes. Defaults to "\t.zero\t"
165  const char *ZeroDirective;
166 
167  /// This directive allows emission of an ascii string with the standard C
168  /// escape characters embedded into it. If a target doesn't support this, it
169  /// can be set to null. Defaults to "\t.ascii\t"
170  const char *AsciiDirective;
171 
172  /// If not null, this allows for special handling of zero terminated strings
173  /// on this target. This is commonly supported as ".asciz". If a target
174  /// doesn't support this, it can be set to null. Defaults to "\t.asciz\t"
175  const char *AscizDirective;
176 
177  /// These directives are used to output some unit of integer data to the
178  /// current section. If a data directive is set to null, smaller data
179  /// directives will be used to emit the large sizes. Defaults to "\t.byte\t",
180  /// "\t.short\t", "\t.long\t", "\t.quad\t"
181  const char *Data8bitsDirective;
182  const char *Data16bitsDirective;
183  const char *Data32bitsDirective;
184  const char *Data64bitsDirective;
185 
186  /// If non-null, a directive that is used to emit a word which should be
187  /// relocated as a 64-bit GP-relative offset, e.g. .gpdword on Mips. Defaults
188  /// to nullptr.
189  const char *GPRel64Directive = nullptr;
190 
191  /// If non-null, a directive that is used to emit a word which should be
192  /// relocated as a 32-bit GP-relative offset, e.g. .gpword on Mips or .gprel32
193  /// on Alpha. Defaults to nullptr.
194  const char *GPRel32Directive = nullptr;
195 
196  /// If non-null, directives that are used to emit a word/dword which should
197  /// be relocated as a 32/64-bit DTP/TP-relative offset, e.g. .dtprelword/
198  /// .dtpreldword/.tprelword/.tpreldword on Mips.
199  const char *DTPRel32Directive = nullptr;
200  const char *DTPRel64Directive = nullptr;
201  const char *TPRel32Directive = nullptr;
202  const char *TPRel64Directive = nullptr;
203 
204  /// This is true if this target uses "Sun Style" syntax for section switching
205  /// ("#alloc,#write" etc) instead of the normal ELF syntax (,"a,w") in
206  /// .section directives. Defaults to false.
207  bool SunStyleELFSectionSwitchSyntax = false;
208 
209  /// This is true if this target uses ELF '.section' directive before the
210  /// '.bss' one. It's used for PPC/Linux which doesn't support the '.bss'
211  /// directive only. Defaults to false.
212  bool UsesELFSectionDirectiveForBSS = false;
213 
214  bool NeedsDwarfSectionOffsetDirective = false;
215 
216  //===--- Alignment Information ----------------------------------------===//
217 
218  /// If this is true (the default) then the asmprinter emits ".align N"
219  /// directives, where N is the number of bytes to align to. Otherwise, it
220  /// emits ".align log2(N)", e.g. 3 to align to an 8 byte boundary. Defaults
221  /// to true.
222  bool AlignmentIsInBytes = true;
223 
224  /// If non-zero, this is used to fill the executable space created as the
225  /// result of a alignment directive. Defaults to 0
226  unsigned TextAlignFillValue = 0;
227 
228  //===--- Global Variable Emission Directives --------------------------===//
229 
230  /// This is the directive used to declare a global entity. Defaults to
231  /// ".globl".
232  const char *GlobalDirective;
233 
234  /// True if the expression
235  /// .long f - g
236  /// uses a relocation but it can be suppressed by writing
237  /// a = f - g
238  /// .long a
239  bool SetDirectiveSuppressesReloc = false;
240 
241  /// False if the assembler requires that we use
242  /// \code
243  /// Lc = a - b
244  /// .long Lc
245  /// \endcode
246  //
247  /// instead of
248  //
249  /// \code
250  /// .long a - b
251  /// \endcode
252  ///
253  /// Defaults to true.
254  bool HasAggressiveSymbolFolding = true;
255 
256  /// True is .comm's and .lcomms optional alignment is to be specified in bytes
257  /// instead of log2(n). Defaults to true.
258  bool COMMDirectiveAlignmentIsInBytes = true;
259 
260  /// Describes if the .lcomm directive for the target supports an alignment
261  /// argument and how it is interpreted. Defaults to NoAlignment.
262  LCOMM::LCOMMType LCOMMDirectiveAlignmentType = LCOMM::NoAlignment;
263 
264  // True if the target allows .align directives on functions. This is true for
265  // most targets, so defaults to true.
266  bool HasFunctionAlignment = true;
267 
268  /// True if the target has .type and .size directives, this is true for most
269  /// ELF targets. Defaults to true.
270  bool HasDotTypeDotSizeDirective = true;
271 
272  /// True if the target has a single parameter .file directive, this is true
273  /// for ELF targets. Defaults to true.
274  bool HasSingleParameterDotFile = true;
275 
276  /// True if the target has a .ident directive, this is true for ELF targets.
277  /// Defaults to false.
278  bool HasIdentDirective = false;
279 
280  /// True if this target supports the MachO .no_dead_strip directive. Defaults
281  /// to false.
282  bool HasNoDeadStrip = false;
283 
284  /// True if this target supports the MachO .alt_entry directive. Defaults to
285  /// false.
286  bool HasAltEntry = false;
287 
288  /// Used to declare a global as being a weak symbol. Defaults to ".weak".
289  const char *WeakDirective;
290 
291  /// This directive, if non-null, is used to declare a global as being a weak
292  /// undefined symbol. Defaults to nullptr.
293  const char *WeakRefDirective = nullptr;
294 
295  /// True if we have a directive to declare a global as being a weak defined
296  /// symbol. Defaults to false.
297  bool HasWeakDefDirective = false;
298 
299  /// True if we have a directive to declare a global as being a weak defined
300  /// symbol that can be hidden (unexported). Defaults to false.
301  bool HasWeakDefCanBeHiddenDirective = false;
302 
303  /// True if we have a .linkonce directive. This is used on cygwin/mingw.
304  /// Defaults to false.
305  bool HasLinkOnceDirective = false;
306 
307  /// This attribute, if not MCSA_Invalid, is used to declare a symbol as having
308  /// hidden visibility. Defaults to MCSA_Hidden.
309  MCSymbolAttr HiddenVisibilityAttr = MCSA_Hidden;
310 
311  /// This attribute, if not MCSA_Invalid, is used to declare an undefined
312  /// symbol as having hidden visibility. Defaults to MCSA_Hidden.
313  MCSymbolAttr HiddenDeclarationVisibilityAttr = MCSA_Hidden;
314 
315  /// This attribute, if not MCSA_Invalid, is used to declare a symbol as having
316  /// protected visibility. Defaults to MCSA_Protected
317  MCSymbolAttr ProtectedVisibilityAttr = MCSA_Protected;
318 
319  //===--- Dwarf Emission Directives -----------------------------------===//
320 
321  /// True if target supports emission of debugging information. Defaults to
322  /// false.
323  bool SupportsDebugInformation = false;
324 
325  /// Exception handling format for the target. Defaults to None.
327 
328  /// Windows exception handling data (.pdata) encoding. Defaults to Invalid.
330 
331  /// True if Dwarf2 output generally uses relocations for references to other
332  /// .debug_* sections.
333  bool DwarfUsesRelocationsAcrossSections = true;
334 
335  /// True if DWARF FDE symbol reference relocations should be replaced by an
336  /// absolute difference.
337  bool DwarfFDESymbolsUseAbsDiff = false;
338 
339  /// True if dwarf register numbers are printed instead of symbolic register
340  /// names in .cfi_* directives. Defaults to false.
341  bool DwarfRegNumForCFI = false;
342 
343  /// True if target uses parens to indicate the symbol variant instead of @.
344  /// For example, foo(plt) instead of foo@plt. Defaults to false.
345  bool UseParensForSymbolVariant = false;
346 
347  //===--- Prologue State ----------------------------------------------===//
348 
349  std::vector<MCCFIInstruction> InitialFrameState;
350 
351  //===--- Integrated Assembler Information ----------------------------===//
352 
353  /// Should we use the integrated assembler?
354  /// The integrated assembler should be enabled by default (by the
355  /// constructors) when failing to parse a valid piece of assembly (inline
356  /// or otherwise) is considered a bug. It may then be overridden after
357  /// construction (see LLVMTargetMachine::initAsmInfo()).
359 
360  /// Preserve Comments in assembly
362 
363  /// Compress DWARF debug sections. Defaults to no compression.
365 
366  /// True if the integrated assembler should interpret 'a >> b' constant
367  /// expressions as logical rather than arithmetic.
368  bool UseLogicalShr = true;
369 
370  // If true, emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL, on
371  // X86_64 ELF.
372  bool RelaxELFRelocations = true;
373 
374  // If true, then the lexer and expression parser will support %neg(),
375  // %hi(), and similar unary operators.
376  bool HasMipsExpressions = false;
377 
378 public:
379  explicit MCAsmInfo();
380  virtual ~MCAsmInfo();
381 
382  /// Get the code pointer size in bytes.
383  unsigned getCodePointerSize() const { return CodePointerSize; }
384 
385  /// Get the callee-saved register stack slot
386  /// size in bytes.
387  unsigned getCalleeSaveStackSlotSize() const {
388  return CalleeSaveStackSlotSize;
389  }
390 
391  /// True if the target is little endian.
392  bool isLittleEndian() const { return IsLittleEndian; }
393 
394  /// True if target stack grow up.
395  bool isStackGrowthDirectionUp() const { return StackGrowsUp; }
396 
397  bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; }
398 
399  // Data directive accessors.
400 
401  const char *getData8bitsDirective() const { return Data8bitsDirective; }
402  const char *getData16bitsDirective() const { return Data16bitsDirective; }
403  const char *getData32bitsDirective() const { return Data32bitsDirective; }
404  const char *getData64bitsDirective() const { return Data64bitsDirective; }
405  const char *getGPRel64Directive() const { return GPRel64Directive; }
406  const char *getGPRel32Directive() const { return GPRel32Directive; }
407  const char *getDTPRel64Directive() const { return DTPRel64Directive; }
408  const char *getDTPRel32Directive() const { return DTPRel32Directive; }
409  const char *getTPRel64Directive() const { return TPRel64Directive; }
410  const char *getTPRel32Directive() const { return TPRel32Directive; }
411 
412  /// Targets can implement this method to specify a section to switch to if the
413  /// translation unit doesn't have any trampolines that require an executable
414  /// stack.
416  return nullptr;
417  }
418 
419  /// \brief True if the section is atomized using the symbols in it.
420  /// This is false if the section is not atomized at all (most ELF sections) or
421  /// if it is atomized based on its contents (MachO' __TEXT,__cstring for
422  /// example).
423  virtual bool isSectionAtomizableBySymbols(const MCSection &Section) const;
424 
425  virtual const MCExpr *getExprForPersonalitySymbol(const MCSymbol *Sym,
426  unsigned Encoding,
427  MCStreamer &Streamer) const;
428 
429  virtual const MCExpr *getExprForFDESymbol(const MCSymbol *Sym,
430  unsigned Encoding,
431  MCStreamer &Streamer) const;
432 
433  /// Return true if the identifier \p Name does not need quotes to be
434  /// syntactically correct.
435  virtual bool isValidUnquotedName(StringRef Name) const;
436 
437  /// Return true if the .section directive should be omitted when
438  /// emitting \p SectionName. For example:
439  ///
440  /// shouldOmitSectionDirective(".text")
441  ///
442  /// returns false => .section .text,#alloc,#execinstr
443  /// returns true => .text
444  virtual bool shouldOmitSectionDirective(StringRef SectionName) const;
445 
447  return SunStyleELFSectionSwitchSyntax;
448  }
449 
451  return UsesELFSectionDirectiveForBSS;
452  }
453 
455  return NeedsDwarfSectionOffsetDirective;
456  }
457 
458  // Accessors.
459 
460  bool hasMachoZeroFillDirective() const { return HasMachoZeroFillDirective; }
461  bool hasMachoTBSSDirective() const { return HasMachoTBSSDirective; }
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  StringRef 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  StringRef getPrivateGlobalPrefix() const { return PrivateGlobalPrefix; }
477  StringRef getPrivateLabelPrefix() const { return PrivateLabelPrefix; }
478 
480  return LinkerPrivateGlobalPrefix[0] != '\0';
481  }
482 
484  if (hasLinkerPrivateGlobalPrefix())
485  return LinkerPrivateGlobalPrefix;
486  return getPrivateGlobalPrefix();
487  }
488 
489  const char *getInlineAsmStart() const { return InlineAsmStart; }
490  const char *getInlineAsmEnd() const { return InlineAsmEnd; }
491  const char *getCode16Directive() const { return Code16Directive; }
492  const char *getCode32Directive() const { return Code32Directive; }
493  const char *getCode64Directive() const { return Code64Directive; }
494  unsigned getAssemblerDialect() const { return AssemblerDialect; }
495  bool doesAllowAtInName() const { return AllowAtInName; }
496  bool supportsNameQuoting() const { return SupportsQuotedNames; }
497 
499  return UseDataRegionDirectives;
500  }
501 
502  const char *getZeroDirective() const { return ZeroDirective; }
503  const char *getAsciiDirective() const { return AsciiDirective; }
504  const char *getAscizDirective() const { return AscizDirective; }
505  bool getAlignmentIsInBytes() const { return AlignmentIsInBytes; }
506  unsigned getTextAlignFillValue() const { return TextAlignFillValue; }
507  const char *getGlobalDirective() const { return GlobalDirective; }
508 
510  return SetDirectiveSuppressesReloc;
511  }
512 
513  bool hasAggressiveSymbolFolding() const { return HasAggressiveSymbolFolding; }
514 
516  return COMMDirectiveAlignmentIsInBytes;
517  }
518 
520  return LCOMMDirectiveAlignmentType;
521  }
522 
523  bool hasFunctionAlignment() const { return HasFunctionAlignment; }
524  bool hasDotTypeDotSizeDirective() const { return HasDotTypeDotSizeDirective; }
525  bool hasSingleParameterDotFile() const { return HasSingleParameterDotFile; }
526  bool hasIdentDirective() const { return HasIdentDirective; }
527  bool hasNoDeadStrip() const { return HasNoDeadStrip; }
528  bool hasAltEntry() const { return HasAltEntry; }
529  const char *getWeakDirective() const { return WeakDirective; }
530  const char *getWeakRefDirective() const { return WeakRefDirective; }
531  bool hasWeakDefDirective() const { return HasWeakDefDirective; }
532 
534  return HasWeakDefCanBeHiddenDirective;
535  }
536 
537  bool hasLinkOnceDirective() const { return HasLinkOnceDirective; }
538 
539  MCSymbolAttr getHiddenVisibilityAttr() const { return HiddenVisibilityAttr; }
540 
542  return HiddenDeclarationVisibilityAttr;
543  }
544 
546  return ProtectedVisibilityAttr;
547  }
548 
549  bool doesSupportDebugInformation() const { return SupportsDebugInformation; }
550 
552  return ExceptionsType != ExceptionHandling::None;
553  }
554 
555  ExceptionHandling getExceptionHandlingType() const { return ExceptionsType; }
556  WinEH::EncodingType getWinEHEncodingType() const { return WinEHEncodingType; }
557 
559  ExceptionsType = EH;
560  }
561 
562  /// Returns true if the exception handling method for the platform uses call
563  /// frame information to unwind.
564  bool usesCFIForEH() const {
565  return (ExceptionsType == ExceptionHandling::DwarfCFI ||
566  ExceptionsType == ExceptionHandling::ARM || usesWindowsCFI());
567  }
568 
569  bool usesWindowsCFI() const {
570  return ExceptionsType == ExceptionHandling::WinEH &&
571  (WinEHEncodingType != WinEH::EncodingType::Invalid &&
572  WinEHEncodingType != WinEH::EncodingType::X86);
573  }
574 
576  return DwarfUsesRelocationsAcrossSections;
577  }
578 
579  bool doDwarfFDESymbolsUseAbsDiff() const { return DwarfFDESymbolsUseAbsDiff; }
580  bool useDwarfRegNumForCFI() const { return DwarfRegNumForCFI; }
581  bool useParensForSymbolVariant() const { return UseParensForSymbolVariant; }
582 
584  InitialFrameState.push_back(Inst);
585  }
586 
587  const std::vector<MCCFIInstruction> &getInitialFrameState() const {
588  return InitialFrameState;
589  }
590 
591  /// Return true if assembly (inline or otherwise) should be parsed.
592  bool useIntegratedAssembler() const { return UseIntegratedAssembler; }
593 
594  /// Set whether assembly (inline or otherwise) should be parsed.
595  virtual void setUseIntegratedAssembler(bool Value) {
596  UseIntegratedAssembler = Value;
597  }
598 
599  /// Return true if assembly (inline or otherwise) should be parsed.
600  bool preserveAsmComments() const { return PreserveAsmComments; }
601 
602  /// Set whether assembly (inline or otherwise) should be parsed.
603  virtual void setPreserveAsmComments(bool Value) {
604  PreserveAsmComments = Value;
605  }
606 
608  return CompressDebugSections;
609  }
610 
611  void setCompressDebugSections(DebugCompressionType CompressDebugSections) {
612  this->CompressDebugSections = CompressDebugSections;
613  }
614 
615  bool shouldUseLogicalShr() const { return UseLogicalShr; }
616 
617  bool canRelaxRelocations() const { return RelaxELFRelocations; }
618  void setRelaxELFRelocations(bool V) { RelaxELFRelocations = V; }
619  bool hasMipsExpressions() const { return HasMipsExpressions; }
620 };
621 
622 } // end namespace llvm
623 
624 #endif // LLVM_MC_MCASMINFO_H
const char * Code16Directive
These are assembly directives that tells the assembler to interpret the following instructions differ...
Definition: MCAsmInfo.h:139
bool doesSupportDataRegionDirectives() const
Definition: MCAsmInfo.h:498
bool getCOMMDirectiveAlignmentIsInBytes() const
Definition: MCAsmInfo.h:515
Instances of this class represent a uniqued identifier for a section in the current translation unit...
Definition: MCSection.h:39
bool doesSetDirectiveSuppressReloc() const
Definition: MCAsmInfo.h:509
bool usesWindowsCFI() const
Definition: MCAsmInfo.h:569
MCSymbolAttr getHiddenVisibilityAttr() const
Definition: MCAsmInfo.h:539
const char * getInlineAsmStart() const
Definition: MCAsmInfo.h:489
const char * getLabelSuffix() const
Definition: MCAsmInfo.h:472
bool UseIntegratedAssembler
Should we use the integrated assembler? The integrated assembler should be enabled by default (by the...
Definition: MCAsmInfo.h:358
StringRef PrivateLabelPrefix
This prefix is used for labels for basic blocks.
Definition: MCAsmInfo.h:123
const char * WeakDirective
Used to declare a global as being a weak symbol. Defaults to ".weak".
Definition: MCAsmInfo.h:289
Compute iterated dominance frontiers using a linear time algorithm.
Definition: AllocatorList.h:24
const char * getGlobalDirective() const
Definition: MCAsmInfo.h:507
void setCompressDebugSections(DebugCompressionType CompressDebugSections)
Definition: MCAsmInfo.h:611
bool hasMachoTBSSDirective() const
Definition: MCAsmInfo.h:461
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:42
virtual void setUseIntegratedAssembler(bool Value)
Set whether assembly (inline or otherwise) should be parsed.
Definition: MCAsmInfo.h:595
bool doesSupportDebugInformation() const
Definition: MCAsmInfo.h:549
bool hasSingleParameterDotFile() const
Definition: MCAsmInfo.h:525
bool hasLinkOnceDirective() const
Definition: MCAsmInfo.h:537
StringRef getLinkerPrivateGlobalPrefix() const
Definition: MCAsmInfo.h:483
const char * Data64bitsDirective
Definition: MCAsmInfo.h:184
const char * ZeroDirective
This should be set to the directive used to get some number of zero bytes emitted to the current sect...
Definition: MCAsmInfo.h:165
const char * getCode16Directive() const
Definition: MCAsmInfo.h:491
bool hasDotTypeDotSizeDirective() const
Definition: MCAsmInfo.h:524
bool needsDwarfSectionOffsetDirective() const
Definition: MCAsmInfo.h:454
const char * GlobalDirective
This is the directive used to declare a global entity.
Definition: MCAsmInfo.h:232
bool supportsNameQuoting() const
Definition: MCAsmInfo.h:496
const char * getData64bitsDirective() const
Definition: MCAsmInfo.h:404
const char * getTPRel64Directive() const
Definition: MCAsmInfo.h:409
const char * getInlineAsmEnd() const
Definition: MCAsmInfo.h:490
StringRef getPrivateGlobalPrefix() const
Definition: MCAsmInfo.h:476
bool hasIdentDirective() const
Definition: MCAsmInfo.h:526
const char * AsciiDirective
This directive allows emission of an ascii string with the standard C escape characters embedded into...
Definition: MCAsmInfo.h:170
bool useParensForSymbolVariant() const
Definition: MCAsmInfo.h:581
bool hasMachoZeroFillDirective() const
Definition: MCAsmInfo.h:460
WinEH::EncodingType getWinEHEncodingType() const
Definition: MCAsmInfo.h:556
bool canRelaxRelocations() const
Definition: MCAsmInfo.h:617
const char * SeparatorString
This string, if specified, is used to separate instructions from each other when on the same line...
Definition: MCAsmInfo.h:101
const char * getDTPRel64Directive() const
Definition: MCAsmInfo.h:407
bool getAlignmentIsInBytes() const
Definition: MCAsmInfo.h:505
const char * getAscizDirective() const
Definition: MCAsmInfo.h:504
StringRef CommentString
This indicates the comment character used by the assembler.
Definition: MCAsmInfo.h:105
const char * getZeroDirective() const
Definition: MCAsmInfo.h:502
const char * Data8bitsDirective
These directives are used to output some unit of integer data to the current section.
Definition: MCAsmInfo.h:181
Base class for the full range of assembler expressions which are needed for parsing.
Definition: MCExpr.h:36
Windows x86, uses no CFI, just EH tables.
Windows NT (Windows on ARM)
const char * getGPRel64Directive() const
Definition: MCAsmInfo.h:405
const char * getWeakRefDirective() const
Definition: MCAsmInfo.h:530
DebugCompressionType compressDebugSections() const
Definition: MCAsmInfo.h:607
bool hasAggressiveSymbolFolding() const
Definition: MCAsmInfo.h:513
Context object for machine code objects.
Definition: MCContext.h:60
const char * getWeakDirective() const
Definition: MCAsmInfo.h:529
void addInitialFrameState(const MCCFIInstruction &Inst)
Definition: MCAsmInfo.h:583
bool doesDwarfUseRelocationsAcrossSections() const
Definition: MCAsmInfo.h:575
const char * Code32Directive
Definition: MCAsmInfo.h:140
.protected (ELF)
Definition: MCDirectives.h:40
bool shouldUseLogicalShr() const
Definition: MCAsmInfo.h:615
bool hasFunctionAlignment() const
Definition: MCAsmInfo.h:523
const char * AscizDirective
If not null, this allows for special handling of zero terminated strings on this target.
Definition: MCAsmInfo.h:175
const char * getTPRel32Directive() const
Definition: MCAsmInfo.h:410
bool hasNoDeadStrip() const
Definition: MCAsmInfo.h:527
const char * getData8bitsDirective() const
Definition: MCAsmInfo.h:401
This class is intended to be used as a base class for asm properties and features specific to the tar...
Definition: MCAsmInfo.h:56
const char * InlineAsmStart
If these are nonempty, they contain a directive to emit before and after an inline assembly statement...
Definition: MCAsmInfo.h:133
virtual MCSection * getNonexecutableStackSection(MCContext &Ctx) const
Targets can implement this method to specify a section to switch to if the translation unit doesn&#39;t h...
Definition: MCAsmInfo.h:415
.hidden (ELF)
Definition: MCDirectives.h:31
Streaming machine code generation interface.
Definition: MCStreamer.h:181
virtual void setPreserveAsmComments(bool Value)
Set whether assembly (inline or otherwise) should be parsed.
Definition: MCAsmInfo.h:603
bool useDwarfRegNumForCFI() const
Definition: MCAsmInfo.h:580
const char * getData16bitsDirective() const
Definition: MCAsmInfo.h:402
unsigned getAssemblerDialect() const
Definition: MCAsmInfo.h:494
bool needsLocalForSize() const
Definition: MCAsmInfo.h:475
const char * getSeparatorString() const
Definition: MCAsmInfo.h:465
StringRef getPrivateLabelPrefix() const
Definition: MCAsmInfo.h:477
StringRef getCommentString() const
Definition: MCAsmInfo.h:471
bool hasWeakDefCanBeHiddenDirective() const
Definition: MCAsmInfo.h:533
LCOMM::LCOMMType getLCOMMDirectiveAlignmentType() const
Definition: MCAsmInfo.h:519
bool useAssignmentForEHBegin() const
Definition: MCAsmInfo.h:474
const char * Data16bitsDirective
Definition: MCAsmInfo.h:182
bool doDwarfFDESymbolsUseAbsDiff() const
Definition: MCAsmInfo.h:579
void setRelaxELFRelocations(bool V)
Definition: MCAsmInfo.h:618
bool hasSubsectionsViaSymbols() const
Definition: MCAsmInfo.h:397
const char * getData32bitsDirective() const
Definition: MCAsmInfo.h:403
bool hasWeakDefDirective() const
Definition: MCAsmInfo.h:531
Windows x64, Windows Itanium (IA-64)
bool preserveAsmComments() const
Return true if assembly (inline or otherwise) should be parsed.
Definition: MCAsmInfo.h:600
const std::vector< MCCFIInstruction > & getInitialFrameState() const
Definition: MCAsmInfo.h:587
bool hasMipsExpressions() const
Definition: MCAsmInfo.h:619
const char * LabelSuffix
This is appended to emitted labels. Defaults to ":".
Definition: MCAsmInfo.h:108
unsigned getMinInstAlignment() const
Definition: MCAsmInfo.h:463
std::vector< MCCFIInstruction > InitialFrameState
Definition: MCAsmInfo.h:349
const char * InlineAsmEnd
Definition: MCAsmInfo.h:134
MCSymbolAttr
Definition: MCDirectives.h:19
bool usesSunStyleELFSectionSwitchSyntax() const
Definition: MCAsmInfo.h:446
bool getDollarIsPC() const
Definition: MCAsmInfo.h:464
const char * Data32bitsDirective
Definition: MCAsmInfo.h:183
bool usesCFIForEH() const
Returns true if the exception handling method for the platform uses call frame information to unwind...
Definition: MCAsmInfo.h:564
bool doesAllowAtInName() const
Definition: MCAsmInfo.h:495
unsigned getMaxInstLength() const
Definition: MCAsmInfo.h:462
bool useIntegratedAssembler() const
Return true if assembly (inline or otherwise) should be parsed.
Definition: MCAsmInfo.h:592
bool isStackGrowthDirectionUp() const
True if target stack grow up.
Definition: MCAsmInfo.h:395
bool PreserveAsmComments
Preserve Comments in assembly.
Definition: MCAsmInfo.h:361
bool hasLinkerPrivateGlobalPrefix() const
Definition: MCAsmInfo.h:479
StringRef LinkerPrivateGlobalPrefix
This prefix is used for symbols that should be passed through the assembler but be removed by the lin...
Definition: MCAsmInfo.h:129
const char * getDTPRel32Directive() const
Definition: MCAsmInfo.h:408
unsigned getCalleeSaveStackSlotSize() const
Get the callee-saved register stack slot size in bytes.
Definition: MCAsmInfo.h:387
bool hasAltEntry() const
Definition: MCAsmInfo.h:528
bool isLittleEndian() const
True if the target is little endian.
Definition: MCAsmInfo.h:392
const char * getAsciiDirective() const
Definition: MCAsmInfo.h:503
unsigned getCodePointerSize() const
Get the code pointer size in bytes.
Definition: MCAsmInfo.h:383
const char * getGPRel32Directive() const
Definition: MCAsmInfo.h:406
unsigned getTextAlignFillValue() const
Definition: MCAsmInfo.h:506
unsigned getCommentColumn() const
This indicates the column (zero-based) at which asm comments should be printed.
Definition: MCAsmInfo.h:469
bool usesELFSectionDirectiveForBSS() const
Definition: MCAsmInfo.h:450
LLVM Value Representation.
Definition: Value.h:73
ExceptionHandling
Windows CE ARM, PowerPC, SH3, SH4.
ExceptionHandling getExceptionHandlingType() const
Definition: MCAsmInfo.h:555
void setExceptionsType(ExceptionHandling EH)
Definition: MCAsmInfo.h:558
bool doesSupportExceptionHandling() const
Definition: MCAsmInfo.h:551
const char * getCode64Directive() const
Definition: MCAsmInfo.h:493
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:49
No exception support.
MCSymbolAttr getHiddenDeclarationVisibilityAttr() const
Definition: MCAsmInfo.h:541
StringRef PrivateGlobalPrefix
This prefix is used for globals like constant pool entries that are completely private to the ...
Definition: MCAsmInfo.h:119
MCSymbolAttr getProtectedVisibilityAttr() const
Definition: MCAsmInfo.h:545
const char * Code64Directive
Definition: MCAsmInfo.h:141
DebugCompressionType
const char * getCode32Directive() const
Definition: MCAsmInfo.h:492