LLVM  8.0.0svn
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  /// 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  /// This is the maximum possible length of an instruction, which is needed to
97  /// compute the size of an inline asm. Defaults to 4.
98  unsigned MaxInstLength = 4;
99 
100  /// Every possible instruction length is a multiple of this value. Factored
101  /// out in .debug_frame and .debug_line. Defaults to 1.
102  unsigned MinInstAlignment = 1;
103 
104  /// The '$' token, when not referencing an identifier or constant, refers to
105  /// the current PC. Defaults to false.
106  bool DollarIsPC = false;
107 
108  /// This string, if specified, is used to separate instructions from each
109  /// other when on the same line. Defaults to ';'
110  const char *SeparatorString;
111 
112  /// This indicates the comment character used by the assembler. Defaults to
113  /// "#"
115 
116  /// This is appended to emitted labels. Defaults to ":"
117  const char *LabelSuffix;
118 
119  // Print the EH begin symbol with an assignment. Defaults to false.
120  bool UseAssignmentForEHBegin = false;
121 
122  // Do we need to create a local symbol for .size?
123  bool NeedsLocalForSize = false;
124 
125  /// This prefix is used for globals like constant pool entries that are
126  /// completely private to the .s file and should not have names in the .o
127  /// file. Defaults to "L"
129 
130  /// This prefix is used for labels for basic blocks. Defaults to the same as
131  /// PrivateGlobalPrefix.
133 
134  /// This prefix is used for symbols that should be passed through the
135  /// assembler but be removed by the linker. This is 'l' on Darwin, currently
136  /// used for some ObjC metadata. The default of "" meast that for this system
137  /// a plain private symbol should be used. Defaults to "".
139 
140  /// If these are nonempty, they contain a directive to emit before and after
141  /// an inline assembly statement. Defaults to "#APP\n", "#NO_APP\n"
142  const char *InlineAsmStart;
143  const char *InlineAsmEnd;
144 
145  /// These are assembly directives that tells the assembler to interpret the
146  /// following instructions differently. Defaults to ".code16", ".code32",
147  /// ".code64".
148  const char *Code16Directive;
149  const char *Code32Directive;
150  const char *Code64Directive;
151 
152  /// Which dialect of an assembler variant to use. Defaults to 0
153  unsigned AssemblerDialect = 0;
154 
155  /// This is true if the assembler allows @ characters in symbol names.
156  /// Defaults to false.
157  bool AllowAtInName = false;
158 
159  /// If this is true, symbol names with invalid characters will be printed in
160  /// quotes.
161  bool SupportsQuotedNames = true;
162 
163  /// This is true if data region markers should be printed as
164  /// ".data_region/.end_data_region" directives. If false, use "$d/$a" labels
165  /// instead.
166  bool UseDataRegionDirectives = false;
167 
168  //===--- Data Emission Directives -------------------------------------===//
169 
170  /// This should be set to the directive used to get some number of zero bytes
171  /// emitted to the current section. Common cases are "\t.zero\t" and
172  /// "\t.space\t". If this is set to null, the Data*bitsDirective's will be
173  /// used to emit zero bytes. Defaults to "\t.zero\t"
174  const char *ZeroDirective;
175 
176  /// This directive allows emission of an ascii string with the standard C
177  /// escape characters embedded into it. If a target doesn't support this, it
178  /// can be set to null. Defaults to "\t.ascii\t"
179  const char *AsciiDirective;
180 
181  /// If not null, this allows for special handling of zero terminated strings
182  /// on this target. This is commonly supported as ".asciz". If a target
183  /// doesn't support this, it can be set to null. Defaults to "\t.asciz\t"
184  const char *AscizDirective;
185 
186  /// These directives are used to output some unit of integer data to the
187  /// current section. If a data directive is set to null, smaller data
188  /// directives will be used to emit the large sizes. Defaults to "\t.byte\t",
189  /// "\t.short\t", "\t.long\t", "\t.quad\t"
190  const char *Data8bitsDirective;
191  const char *Data16bitsDirective;
192  const char *Data32bitsDirective;
193  const char *Data64bitsDirective;
194 
195  /// If non-null, a directive that is used to emit a word which should be
196  /// relocated as a 64-bit GP-relative offset, e.g. .gpdword on Mips. Defaults
197  /// to nullptr.
198  const char *GPRel64Directive = nullptr;
199 
200  /// If non-null, a directive that is used to emit a word which should be
201  /// relocated as a 32-bit GP-relative offset, e.g. .gpword on Mips or .gprel32
202  /// on Alpha. Defaults to nullptr.
203  const char *GPRel32Directive = nullptr;
204 
205  /// If non-null, directives that are used to emit a word/dword which should
206  /// be relocated as a 32/64-bit DTP/TP-relative offset, e.g. .dtprelword/
207  /// .dtpreldword/.tprelword/.tpreldword on Mips.
208  const char *DTPRel32Directive = nullptr;
209  const char *DTPRel64Directive = nullptr;
210  const char *TPRel32Directive = nullptr;
211  const char *TPRel64Directive = nullptr;
212 
213  /// This is true if this target uses "Sun Style" syntax for section switching
214  /// ("#alloc,#write" etc) instead of the normal ELF syntax (,"a,w") in
215  /// .section directives. Defaults to false.
216  bool SunStyleELFSectionSwitchSyntax = false;
217 
218  /// This is true if this target uses ELF '.section' directive before the
219  /// '.bss' one. It's used for PPC/Linux which doesn't support the '.bss'
220  /// directive only. Defaults to false.
221  bool UsesELFSectionDirectiveForBSS = false;
222 
223  bool NeedsDwarfSectionOffsetDirective = false;
224 
225  //===--- Alignment Information ----------------------------------------===//
226 
227  /// If this is true (the default) then the asmprinter emits ".align N"
228  /// directives, where N is the number of bytes to align to. Otherwise, it
229  /// emits ".align log2(N)", e.g. 3 to align to an 8 byte boundary. Defaults
230  /// to true.
231  bool AlignmentIsInBytes = true;
232 
233  /// If non-zero, this is used to fill the executable space created as the
234  /// result of a alignment directive. Defaults to 0
235  unsigned TextAlignFillValue = 0;
236 
237  //===--- Global Variable Emission Directives --------------------------===//
238 
239  /// This is the directive used to declare a global entity. Defaults to
240  /// ".globl".
241  const char *GlobalDirective;
242 
243  /// True if the expression
244  /// .long f - g
245  /// uses a relocation but it can be suppressed by writing
246  /// a = f - g
247  /// .long a
248  bool SetDirectiveSuppressesReloc = false;
249 
250  /// False if the assembler requires that we use
251  /// \code
252  /// Lc = a - b
253  /// .long Lc
254  /// \endcode
255  //
256  /// instead of
257  //
258  /// \code
259  /// .long a - b
260  /// \endcode
261  ///
262  /// Defaults to true.
263  bool HasAggressiveSymbolFolding = true;
264 
265  /// True is .comm's and .lcomms optional alignment is to be specified in bytes
266  /// instead of log2(n). Defaults to true.
267  bool COMMDirectiveAlignmentIsInBytes = true;
268 
269  /// Describes if the .lcomm directive for the target supports an alignment
270  /// argument and how it is interpreted. Defaults to NoAlignment.
271  LCOMM::LCOMMType LCOMMDirectiveAlignmentType = LCOMM::NoAlignment;
272 
273  // True if the target allows .align directives on functions. This is true for
274  // most targets, so defaults to true.
275  bool HasFunctionAlignment = true;
276 
277  /// True if the target has .type and .size directives, this is true for most
278  /// ELF targets. Defaults to true.
279  bool HasDotTypeDotSizeDirective = true;
280 
281  /// True if the target has a single parameter .file directive, this is true
282  /// for ELF targets. Defaults to true.
283  bool HasSingleParameterDotFile = true;
284 
285  /// True if the target has a .ident directive, this is true for ELF targets.
286  /// Defaults to false.
287  bool HasIdentDirective = false;
288 
289  /// True if this target supports the MachO .no_dead_strip directive. Defaults
290  /// to false.
291  bool HasNoDeadStrip = false;
292 
293  /// True if this target supports the MachO .alt_entry directive. Defaults to
294  /// false.
295  bool HasAltEntry = false;
296 
297  /// Used to declare a global as being a weak symbol. Defaults to ".weak".
298  const char *WeakDirective;
299 
300  /// This directive, if non-null, is used to declare a global as being a weak
301  /// undefined symbol. Defaults to nullptr.
302  const char *WeakRefDirective = nullptr;
303 
304  /// True if we have a directive to declare a global as being a weak defined
305  /// symbol. Defaults to false.
306  bool HasWeakDefDirective = false;
307 
308  /// True if we have a directive to declare a global as being a weak defined
309  /// symbol that can be hidden (unexported). Defaults to false.
310  bool HasWeakDefCanBeHiddenDirective = false;
311 
312  /// True if we have a .linkonce directive. This is used on cygwin/mingw.
313  /// Defaults to false.
314  bool HasLinkOnceDirective = false;
315 
316  /// This attribute, if not MCSA_Invalid, is used to declare a symbol as having
317  /// hidden visibility. Defaults to MCSA_Hidden.
318  MCSymbolAttr HiddenVisibilityAttr = MCSA_Hidden;
319 
320  /// This attribute, if not MCSA_Invalid, is used to declare an undefined
321  /// symbol as having hidden visibility. Defaults to MCSA_Hidden.
322  MCSymbolAttr HiddenDeclarationVisibilityAttr = MCSA_Hidden;
323 
324  /// This attribute, if not MCSA_Invalid, is used to declare a symbol as having
325  /// protected visibility. Defaults to MCSA_Protected
326  MCSymbolAttr ProtectedVisibilityAttr = MCSA_Protected;
327 
328  //===--- Dwarf Emission Directives -----------------------------------===//
329 
330  /// True if target supports emission of debugging information. Defaults to
331  /// false.
332  bool SupportsDebugInformation = false;
333 
334  /// Exception handling format for the target. Defaults to None.
336 
337  /// Windows exception handling data (.pdata) encoding. Defaults to Invalid.
339 
340  /// True if Dwarf2 output generally uses relocations for references to other
341  /// .debug_* sections.
342  bool DwarfUsesRelocationsAcrossSections = true;
343 
344  /// True if DWARF FDE symbol reference relocations should be replaced by an
345  /// absolute difference.
346  bool DwarfFDESymbolsUseAbsDiff = false;
347 
348  /// True if dwarf register numbers are printed instead of symbolic register
349  /// names in .cfi_* directives. Defaults to false.
350  bool DwarfRegNumForCFI = false;
351 
352  /// True if target uses parens to indicate the symbol variant instead of @.
353  /// For example, foo(plt) instead of foo@plt. Defaults to false.
354  bool UseParensForSymbolVariant = false;
355 
356  /// True if the target supports flags in ".loc" directive, false if only
357  /// location is allowed.
358  bool SupportsExtendedDwarfLocDirective = true;
359 
360  //===--- Prologue State ----------------------------------------------===//
361 
362  std::vector<MCCFIInstruction> InitialFrameState;
363 
364  //===--- Integrated Assembler Information ----------------------------===//
365 
366  /// Should we use the integrated assembler?
367  /// The integrated assembler should be enabled by default (by the
368  /// constructors) when failing to parse a valid piece of assembly (inline
369  /// or otherwise) is considered a bug. It may then be overridden after
370  /// construction (see LLVMTargetMachine::initAsmInfo()).
372 
373  /// Preserve Comments in assembly
375 
376  /// Compress DWARF debug sections. Defaults to no compression.
378 
379  /// True if the integrated assembler should interpret 'a >> b' constant
380  /// expressions as logical rather than arithmetic.
381  bool UseLogicalShr = true;
382 
383  // If true, emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL, on
384  // X86_64 ELF.
385  bool RelaxELFRelocations = true;
386 
387  // If true, then the lexer and expression parser will support %neg(),
388  // %hi(), and similar unary operators.
389  bool HasMipsExpressions = false;
390 
391 public:
392  explicit MCAsmInfo();
393  virtual ~MCAsmInfo();
394 
395  /// Get the code pointer size in bytes.
396  unsigned getCodePointerSize() const { return CodePointerSize; }
397 
398  /// Get the callee-saved register stack slot
399  /// size in bytes.
400  unsigned getCalleeSaveStackSlotSize() const {
401  return CalleeSaveStackSlotSize;
402  }
403 
404  /// True if the target is little endian.
405  bool isLittleEndian() const { return IsLittleEndian; }
406 
407  /// True if target stack grow up.
408  bool isStackGrowthDirectionUp() const { return StackGrowsUp; }
409 
410  bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; }
411 
412  // Data directive accessors.
413 
414  const char *getData8bitsDirective() const { return Data8bitsDirective; }
415  const char *getData16bitsDirective() const { return Data16bitsDirective; }
416  const char *getData32bitsDirective() const { return Data32bitsDirective; }
417  const char *getData64bitsDirective() const { return Data64bitsDirective; }
418  const char *getGPRel64Directive() const { return GPRel64Directive; }
419  const char *getGPRel32Directive() const { return GPRel32Directive; }
420  const char *getDTPRel64Directive() const { return DTPRel64Directive; }
421  const char *getDTPRel32Directive() const { return DTPRel32Directive; }
422  const char *getTPRel64Directive() const { return TPRel64Directive; }
423  const char *getTPRel32Directive() const { return TPRel32Directive; }
424 
425  /// Targets can implement this method to specify a section to switch to if the
426  /// translation unit doesn't have any trampolines that require an executable
427  /// stack.
429  return nullptr;
430  }
431 
432  /// True if the section is atomized using the symbols in it.
433  /// This is false if the section is not atomized at all (most ELF sections) or
434  /// if it is atomized based on its contents (MachO' __TEXT,__cstring for
435  /// example).
436  virtual bool isSectionAtomizableBySymbols(const MCSection &Section) const;
437 
438  virtual const MCExpr *getExprForPersonalitySymbol(const MCSymbol *Sym,
439  unsigned Encoding,
440  MCStreamer &Streamer) const;
441 
442  virtual const MCExpr *getExprForFDESymbol(const MCSymbol *Sym,
443  unsigned Encoding,
444  MCStreamer &Streamer) const;
445 
446  /// Return true if the identifier \p Name does not need quotes to be
447  /// syntactically correct.
448  virtual bool isValidUnquotedName(StringRef Name) const;
449 
450  /// Return true if the .section directive should be omitted when
451  /// emitting \p SectionName. For example:
452  ///
453  /// shouldOmitSectionDirective(".text")
454  ///
455  /// returns false => .section .text,#alloc,#execinstr
456  /// returns true => .text
457  virtual bool shouldOmitSectionDirective(StringRef SectionName) const;
458 
460  return SunStyleELFSectionSwitchSyntax;
461  }
462 
464  return UsesELFSectionDirectiveForBSS;
465  }
466 
468  return NeedsDwarfSectionOffsetDirective;
469  }
470 
471  // Accessors.
472 
473  bool hasMachoZeroFillDirective() const { return HasMachoZeroFillDirective; }
474  bool hasMachoTBSSDirective() const { return HasMachoTBSSDirective; }
475  bool hasCOFFAssociativeComdats() const { return HasCOFFAssociativeComdats; }
476  bool hasCOFFComdatConstants() const { return HasCOFFComdatConstants; }
477  unsigned getMaxInstLength() const { return MaxInstLength; }
478  unsigned getMinInstAlignment() const { return MinInstAlignment; }
479  bool getDollarIsPC() const { return DollarIsPC; }
480  const char *getSeparatorString() const { return SeparatorString; }
481 
482  /// This indicates the column (zero-based) at which asm comments should be
483  /// printed.
484  unsigned getCommentColumn() const { return 40; }
485 
486  StringRef getCommentString() const { return CommentString; }
487  const char *getLabelSuffix() const { return LabelSuffix; }
488 
489  bool useAssignmentForEHBegin() const { return UseAssignmentForEHBegin; }
490  bool needsLocalForSize() const { return NeedsLocalForSize; }
491  StringRef getPrivateGlobalPrefix() const { return PrivateGlobalPrefix; }
492  StringRef getPrivateLabelPrefix() const { return PrivateLabelPrefix; }
493 
495  return LinkerPrivateGlobalPrefix[0] != '\0';
496  }
497 
499  if (hasLinkerPrivateGlobalPrefix())
500  return LinkerPrivateGlobalPrefix;
501  return getPrivateGlobalPrefix();
502  }
503 
504  const char *getInlineAsmStart() const { return InlineAsmStart; }
505  const char *getInlineAsmEnd() const { return InlineAsmEnd; }
506  const char *getCode16Directive() const { return Code16Directive; }
507  const char *getCode32Directive() const { return Code32Directive; }
508  const char *getCode64Directive() const { return Code64Directive; }
509  unsigned getAssemblerDialect() const { return AssemblerDialect; }
510  bool doesAllowAtInName() const { return AllowAtInName; }
511  bool supportsNameQuoting() const { return SupportsQuotedNames; }
512 
514  return UseDataRegionDirectives;
515  }
516 
517  const char *getZeroDirective() const { return ZeroDirective; }
518  const char *getAsciiDirective() const { return AsciiDirective; }
519  const char *getAscizDirective() const { return AscizDirective; }
520  bool getAlignmentIsInBytes() const { return AlignmentIsInBytes; }
521  unsigned getTextAlignFillValue() const { return TextAlignFillValue; }
522  const char *getGlobalDirective() const { return GlobalDirective; }
523 
525  return SetDirectiveSuppressesReloc;
526  }
527 
528  bool hasAggressiveSymbolFolding() const { return HasAggressiveSymbolFolding; }
529 
531  return COMMDirectiveAlignmentIsInBytes;
532  }
533 
535  return LCOMMDirectiveAlignmentType;
536  }
537 
538  bool hasFunctionAlignment() const { return HasFunctionAlignment; }
539  bool hasDotTypeDotSizeDirective() const { return HasDotTypeDotSizeDirective; }
540  bool hasSingleParameterDotFile() const { return HasSingleParameterDotFile; }
541  bool hasIdentDirective() const { return HasIdentDirective; }
542  bool hasNoDeadStrip() const { return HasNoDeadStrip; }
543  bool hasAltEntry() const { return HasAltEntry; }
544  const char *getWeakDirective() const { return WeakDirective; }
545  const char *getWeakRefDirective() const { return WeakRefDirective; }
546  bool hasWeakDefDirective() const { return HasWeakDefDirective; }
547 
549  return HasWeakDefCanBeHiddenDirective;
550  }
551 
552  bool hasLinkOnceDirective() const { return HasLinkOnceDirective; }
553 
554  MCSymbolAttr getHiddenVisibilityAttr() const { return HiddenVisibilityAttr; }
555 
557  return HiddenDeclarationVisibilityAttr;
558  }
559 
561  return ProtectedVisibilityAttr;
562  }
563 
564  bool doesSupportDebugInformation() const { return SupportsDebugInformation; }
565 
567  return ExceptionsType != ExceptionHandling::None;
568  }
569 
570  ExceptionHandling getExceptionHandlingType() const { return ExceptionsType; }
571  WinEH::EncodingType getWinEHEncodingType() const { return WinEHEncodingType; }
572 
574  ExceptionsType = EH;
575  }
576 
577  /// Returns true if the exception handling method for the platform uses call
578  /// frame information to unwind.
579  bool usesCFIForEH() const {
580  return (ExceptionsType == ExceptionHandling::DwarfCFI ||
581  ExceptionsType == ExceptionHandling::ARM || usesWindowsCFI());
582  }
583 
584  bool usesWindowsCFI() const {
585  return ExceptionsType == ExceptionHandling::WinEH &&
586  (WinEHEncodingType != WinEH::EncodingType::Invalid &&
587  WinEHEncodingType != WinEH::EncodingType::X86);
588  }
589 
591  return DwarfUsesRelocationsAcrossSections;
592  }
593 
594  bool doDwarfFDESymbolsUseAbsDiff() const { return DwarfFDESymbolsUseAbsDiff; }
595  bool useDwarfRegNumForCFI() const { return DwarfRegNumForCFI; }
596  bool useParensForSymbolVariant() const { return UseParensForSymbolVariant; }
598  return SupportsExtendedDwarfLocDirective;
599  }
600 
602  InitialFrameState.push_back(Inst);
603  }
604 
605  const std::vector<MCCFIInstruction> &getInitialFrameState() const {
606  return InitialFrameState;
607  }
608 
609  /// Return true if assembly (inline or otherwise) should be parsed.
610  bool useIntegratedAssembler() const { return UseIntegratedAssembler; }
611 
612  /// Set whether assembly (inline or otherwise) should be parsed.
613  virtual void setUseIntegratedAssembler(bool Value) {
614  UseIntegratedAssembler = Value;
615  }
616 
617  /// Return true if assembly (inline or otherwise) should be parsed.
618  bool preserveAsmComments() const { return PreserveAsmComments; }
619 
620  /// Set whether assembly (inline or otherwise) should be parsed.
621  virtual void setPreserveAsmComments(bool Value) {
622  PreserveAsmComments = Value;
623  }
624 
626  return CompressDebugSections;
627  }
628 
629  void setCompressDebugSections(DebugCompressionType CompressDebugSections) {
630  this->CompressDebugSections = CompressDebugSections;
631  }
632 
633  bool shouldUseLogicalShr() const { return UseLogicalShr; }
634 
635  bool canRelaxRelocations() const { return RelaxELFRelocations; }
636  void setRelaxELFRelocations(bool V) { RelaxELFRelocations = V; }
637  bool hasMipsExpressions() const { return HasMipsExpressions; }
638 };
639 
640 } // end namespace llvm
641 
642 #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:148
bool doesSupportDataRegionDirectives() const
Definition: MCAsmInfo.h:513
bool getCOMMDirectiveAlignmentIsInBytes() const
Definition: MCAsmInfo.h:530
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:524
bool usesWindowsCFI() const
Definition: MCAsmInfo.h:584
MCSymbolAttr getHiddenVisibilityAttr() const
Definition: MCAsmInfo.h:554
const char * getInlineAsmStart() const
Definition: MCAsmInfo.h:504
const char * getLabelSuffix() const
Definition: MCAsmInfo.h:487
bool UseIntegratedAssembler
Should we use the integrated assembler? The integrated assembler should be enabled by default (by the...
Definition: MCAsmInfo.h:371
StringRef PrivateLabelPrefix
This prefix is used for labels for basic blocks.
Definition: MCAsmInfo.h:132
const char * WeakDirective
Used to declare a global as being a weak symbol. Defaults to ".weak".
Definition: MCAsmInfo.h:298
Compute iterated dominance frontiers using a linear time algorithm.
Definition: AllocatorList.h:24
const char * getGlobalDirective() const
Definition: MCAsmInfo.h:522
void setCompressDebugSections(DebugCompressionType CompressDebugSections)
Definition: MCAsmInfo.h:629
bool hasMachoTBSSDirective() const
Definition: MCAsmInfo.h:474
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:613
bool doesSupportDebugInformation() const
Definition: MCAsmInfo.h:564
bool hasSingleParameterDotFile() const
Definition: MCAsmInfo.h:540
bool hasLinkOnceDirective() const
Definition: MCAsmInfo.h:552
StringRef getLinkerPrivateGlobalPrefix() const
Definition: MCAsmInfo.h:498
const char * Data64bitsDirective
Definition: MCAsmInfo.h:193
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:174
const char * getCode16Directive() const
Definition: MCAsmInfo.h:506
bool hasDotTypeDotSizeDirective() const
Definition: MCAsmInfo.h:539
bool needsDwarfSectionOffsetDirective() const
Definition: MCAsmInfo.h:467
const char * GlobalDirective
This is the directive used to declare a global entity.
Definition: MCAsmInfo.h:241
bool supportsNameQuoting() const
Definition: MCAsmInfo.h:511
const char * getData64bitsDirective() const
Definition: MCAsmInfo.h:417
const char * getTPRel64Directive() const
Definition: MCAsmInfo.h:422
const char * getInlineAsmEnd() const
Definition: MCAsmInfo.h:505
StringRef getPrivateGlobalPrefix() const
Definition: MCAsmInfo.h:491
bool hasIdentDirective() const
Definition: MCAsmInfo.h:541
const char * AsciiDirective
This directive allows emission of an ascii string with the standard C escape characters embedded into...
Definition: MCAsmInfo.h:179
bool useParensForSymbolVariant() const
Definition: MCAsmInfo.h:596
bool hasMachoZeroFillDirective() const
Definition: MCAsmInfo.h:473
WinEH::EncodingType getWinEHEncodingType() const
Definition: MCAsmInfo.h:571
bool canRelaxRelocations() const
Definition: MCAsmInfo.h:635
const char * SeparatorString
This string, if specified, is used to separate instructions from each other when on the same line...
Definition: MCAsmInfo.h:110
const char * getDTPRel64Directive() const
Definition: MCAsmInfo.h:420
bool getAlignmentIsInBytes() const
Definition: MCAsmInfo.h:520
amdgpu Simplify well known AMD library false Value Value const Twine & Name
const char * getAscizDirective() const
Definition: MCAsmInfo.h:519
StringRef CommentString
This indicates the comment character used by the assembler.
Definition: MCAsmInfo.h:114
const char * getZeroDirective() const
Definition: MCAsmInfo.h:517
const char * Data8bitsDirective
These directives are used to output some unit of integer data to the current section.
Definition: MCAsmInfo.h:190
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.
bool hasCOFFComdatConstants() const
Definition: MCAsmInfo.h:476
Windows NT (Windows on ARM)
const char * getGPRel64Directive() const
Definition: MCAsmInfo.h:418
const char * getWeakRefDirective() const
Definition: MCAsmInfo.h:545
DebugCompressionType compressDebugSections() const
Definition: MCAsmInfo.h:625
bool hasAggressiveSymbolFolding() const
Definition: MCAsmInfo.h:528
Context object for machine code objects.
Definition: MCContext.h:63
const char * getWeakDirective() const
Definition: MCAsmInfo.h:544
void addInitialFrameState(const MCCFIInstruction &Inst)
Definition: MCAsmInfo.h:601
bool doesDwarfUseRelocationsAcrossSections() const
Definition: MCAsmInfo.h:590
const char * Code32Directive
Definition: MCAsmInfo.h:149
.protected (ELF)
Definition: MCDirectives.h:40
bool shouldUseLogicalShr() const
Definition: MCAsmInfo.h:633
bool hasFunctionAlignment() const
Definition: MCAsmInfo.h:538
const char * AscizDirective
If not null, this allows for special handling of zero terminated strings on this target.
Definition: MCAsmInfo.h:184
const char * getTPRel32Directive() const
Definition: MCAsmInfo.h:423
bool hasNoDeadStrip() const
Definition: MCAsmInfo.h:542
bool supportsExtendedDwarfLocDirective() const
Definition: MCAsmInfo.h:597
const char * getData8bitsDirective() const
Definition: MCAsmInfo.h:414
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:142
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:428
.hidden (ELF)
Definition: MCDirectives.h:31
Streaming machine code generation interface.
Definition: MCStreamer.h:183
virtual void setPreserveAsmComments(bool Value)
Set whether assembly (inline or otherwise) should be parsed.
Definition: MCAsmInfo.h:621
bool useDwarfRegNumForCFI() const
Definition: MCAsmInfo.h:595
const char * getData16bitsDirective() const
Definition: MCAsmInfo.h:415
unsigned getAssemblerDialect() const
Definition: MCAsmInfo.h:509
bool needsLocalForSize() const
Definition: MCAsmInfo.h:490
const char * getSeparatorString() const
Definition: MCAsmInfo.h:480
StringRef getPrivateLabelPrefix() const
Definition: MCAsmInfo.h:492
StringRef getCommentString() const
Definition: MCAsmInfo.h:486
bool hasWeakDefCanBeHiddenDirective() const
Definition: MCAsmInfo.h:548
LCOMM::LCOMMType getLCOMMDirectiveAlignmentType() const
Definition: MCAsmInfo.h:534
bool useAssignmentForEHBegin() const
Definition: MCAsmInfo.h:489
const char * Data16bitsDirective
Definition: MCAsmInfo.h:191
bool doDwarfFDESymbolsUseAbsDiff() const
Definition: MCAsmInfo.h:594
void setRelaxELFRelocations(bool V)
Definition: MCAsmInfo.h:636
bool hasSubsectionsViaSymbols() const
Definition: MCAsmInfo.h:410
const char * getData32bitsDirective() const
Definition: MCAsmInfo.h:416
bool hasWeakDefDirective() const
Definition: MCAsmInfo.h:546
Windows x64, Windows Itanium (IA-64)
bool preserveAsmComments() const
Return true if assembly (inline or otherwise) should be parsed.
Definition: MCAsmInfo.h:618
const std::vector< MCCFIInstruction > & getInitialFrameState() const
Definition: MCAsmInfo.h:605
bool hasMipsExpressions() const
Definition: MCAsmInfo.h:637
const char * LabelSuffix
This is appended to emitted labels. Defaults to ":".
Definition: MCAsmInfo.h:117
unsigned getMinInstAlignment() const
Definition: MCAsmInfo.h:478
std::vector< MCCFIInstruction > InitialFrameState
Definition: MCAsmInfo.h:362
const char * InlineAsmEnd
Definition: MCAsmInfo.h:143
MCSymbolAttr
Definition: MCDirectives.h:19
bool usesSunStyleELFSectionSwitchSyntax() const
Definition: MCAsmInfo.h:459
bool getDollarIsPC() const
Definition: MCAsmInfo.h:479
const char * Data32bitsDirective
Definition: MCAsmInfo.h:192
bool usesCFIForEH() const
Returns true if the exception handling method for the platform uses call frame information to unwind...
Definition: MCAsmInfo.h:579
bool doesAllowAtInName() const
Definition: MCAsmInfo.h:510
unsigned getMaxInstLength() const
Definition: MCAsmInfo.h:477
bool useIntegratedAssembler() const
Return true if assembly (inline or otherwise) should be parsed.
Definition: MCAsmInfo.h:610
bool isStackGrowthDirectionUp() const
True if target stack grow up.
Definition: MCAsmInfo.h:408
bool PreserveAsmComments
Preserve Comments in assembly.
Definition: MCAsmInfo.h:374
bool hasLinkerPrivateGlobalPrefix() const
Definition: MCAsmInfo.h:494
bool hasCOFFAssociativeComdats() const
Definition: MCAsmInfo.h:475
StringRef LinkerPrivateGlobalPrefix
This prefix is used for symbols that should be passed through the assembler but be removed by the lin...
Definition: MCAsmInfo.h:138
const char * getDTPRel32Directive() const
Definition: MCAsmInfo.h:421
unsigned getCalleeSaveStackSlotSize() const
Get the callee-saved register stack slot size in bytes.
Definition: MCAsmInfo.h:400
bool hasAltEntry() const
Definition: MCAsmInfo.h:543
bool isLittleEndian() const
True if the target is little endian.
Definition: MCAsmInfo.h:405
const char * getAsciiDirective() const
Definition: MCAsmInfo.h:518
unsigned getCodePointerSize() const
Get the code pointer size in bytes.
Definition: MCAsmInfo.h:396
const char * getGPRel32Directive() const
Definition: MCAsmInfo.h:419
unsigned getTextAlignFillValue() const
Definition: MCAsmInfo.h:521
unsigned getCommentColumn() const
This indicates the column (zero-based) at which asm comments should be printed.
Definition: MCAsmInfo.h:484
bool usesELFSectionDirectiveForBSS() const
Definition: MCAsmInfo.h:463
LLVM Value Representation.
Definition: Value.h:73
ExceptionHandling
Windows CE ARM, PowerPC, SH3, SH4.
ExceptionHandling getExceptionHandlingType() const
Definition: MCAsmInfo.h:570
void setExceptionsType(ExceptionHandling EH)
Definition: MCAsmInfo.h:573
bool doesSupportExceptionHandling() const
Definition: MCAsmInfo.h:566
const char * getCode64Directive() const
Definition: MCAsmInfo.h:508
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:49
No exception support.
MCSymbolAttr getHiddenDeclarationVisibilityAttr() const
Definition: MCAsmInfo.h:556
StringRef PrivateGlobalPrefix
This prefix is used for globals like constant pool entries that are completely private to the ...
Definition: MCAsmInfo.h:128
MCSymbolAttr getProtectedVisibilityAttr() const
Definition: MCAsmInfo.h:560
const char * Code64Directive
Definition: MCAsmInfo.h:150
DebugCompressionType
const char * getCode32Directive() const
Definition: MCAsmInfo.h:507