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"
22#include "llvm/MC/MCTargetOptions.h"
23#include <vector>
24
25namespace llvm {
26
27class MCContext;
28class MCExpr;
29class MCSection;
30class MCStreamer;
31class MCSymbol;
32
33namespace WinEH {
34
35enum 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
48namespace LCOMM {
49
50enum 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.
56class MCAsmInfo {
57protected:
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  /// "#"
105  StringRef CommentString;
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"
119  StringRef PrivateGlobalPrefix;
120
121  /// This prefix is used for labels for basic blocks. Defaults to the same as
122  /// PrivateGlobalPrefix.
123  StringRef PrivateLabelPrefix;
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 "".
129  StringRef LinkerPrivateGlobalPrefix;
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.  Defaults to "\t.ascii\t"
169  const char *AsciiDirective;
170
171  /// If not null, this allows for special handling of zero terminated strings
172  /// on this target.  This is commonly supported as ".asciz".  If a target
173  /// doesn't support this, it can be set to null.  Defaults to "\t.asciz\t"
174  const char *AscizDirective;
175
176  /// These directives are used to output some unit of integer data to the
177  /// current section.  If a data directive is set to null, smaller data
178  /// directives will be used to emit the large sizes.  Defaults to "\t.byte\t",
179  /// "\t.short\t", "\t.long\t", "\t.quad\t"
180  const char *Data8bitsDirective;
181  const char *Data16bitsDirective;
182  const char *Data32bitsDirective;
183  const char *Data64bitsDirective;
184
185  /// If non-null, a directive that is used to emit a word which should be
186  /// relocated as a 64-bit GP-relative offset, e.g. .gpdword on Mips.  Defaults
187  /// to nullptr.
188  const char *GPRel64Directive = nullptr;
189
190  /// If non-null, a directive that is used to emit a word which should be
191  /// relocated as a 32-bit GP-relative offset, e.g. .gpword on Mips or .gprel32
192  /// on Alpha.  Defaults to nullptr.
193  const char *GPRel32Directive = nullptr;
194
195  /// If non-null, directives that are used to emit a word/dword which should
196  /// be relocated as a 32/64-bit DTP/TP-relative offset, e.g. .dtprelword/
197  /// .dtpreldword/.tprelword/.tpreldword on Mips.
198  const char *DTPRel32Directive = nullptr;
199  const char *DTPRel64Directive = nullptr;
200  const char *TPRel32Directive = nullptr;
201  const char *TPRel64Directive = nullptr;
202
203  /// This is true if this target uses "Sun Style" syntax for section switching
204  /// ("#alloc,#write" etc) instead of the normal ELF syntax (,"a,w") in
205  /// .section directives.  Defaults to false.
206  bool SunStyleELFSectionSwitchSyntax = false;
207
208  /// This is true if this target uses ELF '.section' directive before the
209  /// '.bss' one. It's used for PPC/Linux which doesn't support the '.bss'
210  /// directive only.  Defaults to false.
211  bool UsesELFSectionDirectiveForBSS = false;
212
213  bool NeedsDwarfSectionOffsetDirective = false;
214
215  //===--- Alignment Information ----------------------------------------===//
216
217  /// If this is true (the default) then the asmprinter emits ".align N"
218  /// directives, where N is the number of bytes to align to.  Otherwise, it
219  /// emits ".align log2(N)", e.g. 3 to align to an 8 byte boundary.  Defaults
220  /// to true.
221  bool AlignmentIsInBytes = true;
222
223  /// If non-zero, this is used to fill the executable space created as the
224  /// result of a alignment directive.  Defaults to 0
225  unsigned TextAlignFillValue = 0;
226
227  //===--- Global Variable Emission Directives --------------------------===//
228
229  /// This is the directive used to declare a global entity. Defaults to
230  /// ".globl".
231  const char *GlobalDirective;
232
233  /// True if the expression
234  ///   .long f - g
235  /// uses a relocation but it can be suppressed by writing
236  ///   a = f - g
237  ///   .long a
238  bool SetDirectiveSuppressesReloc = false;
239
240  /// False if the assembler requires that we use
241  /// \code
242  ///   Lc = a - b
243  ///   .long Lc
244  /// \endcode
245  //
246  /// instead of
247  //
248  /// \code
249  ///   .long a - b
250  /// \endcode
251  ///
252  ///  Defaults to true.
253  bool HasAggressiveSymbolFolding = true;
254
255  /// True is .comm's and .lcomms optional alignment is to be specified in bytes
256  /// instead of log2(n).  Defaults to true.
257  bool COMMDirectiveAlignmentIsInBytes = true;
258
259  /// Describes if the .lcomm directive for the target supports an alignment
260  /// argument and how it is interpreted.  Defaults to NoAlignment.
261  LCOMM::LCOMMType LCOMMDirectiveAlignmentType = LCOMM::NoAlignment;
262
263  // True if the target allows .align directives on functions. This is true for
264  // most targets, so defaults to true.
265  bool HasFunctionAlignment = true;
266
267  /// True if the target has .type and .size directives, this is true for most
268  /// ELF targets.  Defaults to true.
269  bool HasDotTypeDotSizeDirective = true;
270
271  /// True if the target has a single parameter .file directive, this is true
272  /// for ELF targets.  Defaults to true.
273  bool HasSingleParameterDotFile = true;
274
275  /// True if the target has a .ident directive, this is true for ELF targets.
276  /// Defaults to false.
277  bool HasIdentDirective = false;
278
279  /// True if this target supports the MachO .no_dead_strip directive.  Defaults
280  /// to false.
281  bool HasNoDeadStrip = false;
282
283  /// True if this target supports the MachO .alt_entry directive.  Defaults to
284  /// false.
285  bool HasAltEntry = false;
286
287  /// Used to declare a global as being a weak symbol. Defaults to ".weak".
288  const char *WeakDirective;
289
290  /// This directive, if non-null, is used to declare a global as being a weak
291  /// undefined symbol.  Defaults to nullptr.
292  const char *WeakRefDirective = nullptr;
293
294  /// True if we have a directive to declare a global as being a weak defined
295  /// symbol.  Defaults to false.
296  bool HasWeakDefDirective = false;
297
298  /// True if we have a directive to declare a global as being a weak defined
299  /// symbol that can be hidden (unexported).  Defaults to false.
300  bool HasWeakDefCanBeHiddenDirective = false;
301
302  /// True if we have a .linkonce directive.  This is used on cygwin/mingw.
303  /// Defaults to false.
304  bool HasLinkOnceDirective = false;
305
306  /// This attribute, if not MCSA_Invalid, is used to declare a symbol as having
307  /// hidden visibility.  Defaults to MCSA_Hidden.
308  MCSymbolAttr HiddenVisibilityAttr = MCSA_Hidden;
309
310  /// This attribute, if not MCSA_Invalid, is used to declare an undefined
311  /// symbol as having hidden visibility. Defaults to MCSA_Hidden.
312  MCSymbolAttr HiddenDeclarationVisibilityAttr = MCSA_Hidden;
313
314  /// This attribute, if not MCSA_Invalid, is used to declare a symbol as having
315  /// protected visibility.  Defaults to MCSA_Protected
316  MCSymbolAttr ProtectedVisibilityAttr = MCSA_Protected;
317
318  //===--- Dwarf Emission Directives -----------------------------------===//
319
320  /// True if target supports emission of debugging information.  Defaults to
321  /// false.
322  bool SupportsDebugInformation = false;
323
324  /// Exception handling format for the target.  Defaults to None.
325  ExceptionHandling ExceptionsType = ExceptionHandling::None;
326
327  /// Windows exception handling data (.pdata) encoding.  Defaults to Invalid.
328  WinEH::EncodingType WinEHEncodingType = WinEH::EncodingType::Invalid;
329
330  /// True if Dwarf2 output generally uses relocations for references to other
331  /// .debug_* sections.
332  bool DwarfUsesRelocationsAcrossSections = true;
333
334  /// True if DWARF FDE symbol reference relocations should be replaced by an
335  /// absolute difference.
336  bool DwarfFDESymbolsUseAbsDiff = false;
337
338  /// True if dwarf register numbers are printed instead of symbolic register
339  /// names in .cfi_* directives.  Defaults to false.
340  bool DwarfRegNumForCFI = false;
341
342  /// True if target uses parens to indicate the symbol variant instead of @.
343  /// For example, foo(plt) instead of foo@plt.  Defaults to false.
344  bool UseParensForSymbolVariant = false;
345
346  //===--- Prologue State ----------------------------------------------===//
347
348  std::vector<MCCFIInstruction> InitialFrameState;
349
350  //===--- Integrated Assembler Information ----------------------------===//
351
352  /// Should we use the integrated assembler?
353  /// The integrated assembler should be enabled by default (by the
354  /// constructors) when failing to parse a valid piece of assembly (inline
355  /// or otherwise) is considered a bug. It may then be overridden after
356  /// construction (see LLVMTargetMachine::initAsmInfo()).
357  bool UseIntegratedAssembler;
358
359  /// Preserve Comments in assembly
360  bool PreserveAsmComments;
361
362  /// Compress DWARF debug sections. Defaults to no compression.
363  DebugCompressionType CompressDebugSections = DebugCompressionType::None;
364
365  /// True if the integrated assembler should interpret 'a >> b' constant
366  /// expressions as logical rather than arithmetic.
367  bool UseLogicalShr = true;
368
369  // If true, emit GOTPCRELX/REX_GOTPCRELX instead of GOTPCREL, on
370  // X86_64 ELF.
371  bool RelaxELFRelocations = true;
372
373  // If true, then the lexer and expression parser will support %neg(),
374  // %hi(), and similar unary operators.
375  bool HasMipsExpressions = false;
376
377public:
378  explicit MCAsmInfo();
379  virtual ~MCAsmInfo();
380
381  /// Get the code pointer size in bytes.
382  unsigned getCodePointerSize() const { return CodePointerSize; }
383
384  /// Get the callee-saved register stack slot
385  /// size in bytes.
386  unsigned getCalleeSaveStackSlotSize() const {
387    return CalleeSaveStackSlotSize;
388  }
389
390  /// True if the target is little endian.
391  bool isLittleEndian() const { return IsLittleEndian; }
392
393  /// True if target stack grow up.
394  bool isStackGrowthDirectionUp() const { return StackGrowsUp; }
395
396  bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; }
397
398  // Data directive accessors.
399
400  const char *getData8bitsDirective() const { return Data8bitsDirective; }
401  const char *getData16bitsDirective() const { return Data16bitsDirective; }
402  const char *getData32bitsDirective() const { return Data32bitsDirective; }
403  const char *getData64bitsDirective() const { return Data64bitsDirective; }
404  const char *getGPRel64Directive() const { return GPRel64Directive; }
405  const char *getGPRel32Directive() const { return GPRel32Directive; }
406  const char *getDTPRel64Directive() const { return DTPRel64Directive; }
407  const char *getDTPRel32Directive() const { return DTPRel32Directive; }
408  const char *getTPRel64Directive() const { return TPRel64Directive; }
409  const char *getTPRel32Directive() const { return TPRel32Directive; }
410
411  /// Targets can implement this method to specify a section to switch to if the
412  /// translation unit doesn't have any trampolines that require an executable
413  /// stack.
414  virtual MCSection *getNonexecutableStackSection(MCContext &Ctx) const {
415    return nullptr;
416  }
417
418  /// \brief True if the section is atomized using the symbols in it.
419  /// This is false if the section is not atomized at all (most ELF sections) or
420  /// if it is atomized based on its contents (MachO' __TEXT,__cstring for
421  /// example).
422  virtual bool isSectionAtomizableBySymbols(const MCSection &Section) const;
423
424  virtual const MCExpr *getExprForPersonalitySymbol(const MCSymbol *Sym,
425                                                    unsigned Encoding,
426                                                    MCStreamer &Streamer) const;
427
428  virtual const MCExpr *getExprForFDESymbol(const MCSymbol *Sym,
429                                            unsigned Encoding,
430                                            MCStreamer &Streamer) const;
431
432  /// Return true if the identifier \p Name does not need quotes to be
433  /// syntactically correct.
434  virtual bool isValidUnquotedName(StringRef Name) const;
435
436  /// Return true if the .section directive should be omitted when
437  /// emitting \p SectionName.  For example:
438  ///
439  /// shouldOmitSectionDirective(".text")
440  ///
441  /// returns false => .section .text,#alloc,#execinstr
442  /// returns true  => .text
443  virtual bool shouldOmitSectionDirective(StringRef SectionName) const;
444
445  bool usesSunStyleELFSectionSwitchSyntax() const {
446    return SunStyleELFSectionSwitchSyntax;
447  }
448
449  bool usesELFSectionDirectiveForBSS() const {
450    return UsesELFSectionDirectiveForBSS;
451  }
452
453  bool needsDwarfSectionOffsetDirective() const {
454    return NeedsDwarfSectionOffsetDirective;
455  }
456
457  // Accessors.
458
459  bool hasMachoZeroFillDirective() const { return HasMachoZeroFillDirective; }
460  bool hasMachoTBSSDirective() const { return HasMachoTBSSDirective; }
461  unsigned getMaxInstLength() const { return MaxInstLength; }
462  unsigned getMinInstAlignment() const { return MinInstAlignment; }
463  bool getDollarIsPC() const { return DollarIsPC; }
464  const char *getSeparatorString() const { return SeparatorString; }
465
466  /// This indicates the column (zero-based) at which asm comments should be
467  /// printed.
468  unsigned getCommentColumn() const { return 40; }
469
470  StringRef getCommentString() const { return CommentString; }
471  const char *getLabelSuffix() const { return LabelSuffix; }
472
473  bool useAssignmentForEHBegin() const { return UseAssignmentForEHBegin; }
474  bool needsLocalForSize() const { return NeedsLocalForSize; }
475  StringRef getPrivateGlobalPrefix() const { return PrivateGlobalPrefix; }
476  StringRef getPrivateLabelPrefix() const { return PrivateLabelPrefix; }
477
478  bool hasLinkerPrivateGlobalPrefix() const {
479    return LinkerPrivateGlobalPrefix[0] != '\0';
480  }
481
482  StringRef getLinkerPrivateGlobalPrefix() const {
483    if (hasLinkerPrivateGlobalPrefix())
484      return LinkerPrivateGlobalPrefix;
485    return getPrivateGlobalPrefix();
486  }
487
488  const char *getInlineAsmStart() const { return InlineAsmStart; }
489  const char *getInlineAsmEnd() const { return InlineAsmEnd; }
490  const char *getCode16Directive() const { return Code16Directive; }
491  const char *getCode32Directive() const { return Code32Directive; }
492  const char *getCode64Directive() const { return Code64Directive; }
493  unsigned getAssemblerDialect() const { return AssemblerDialect; }
494  bool doesAllowAtInName() const { return AllowAtInName; }
495  bool supportsNameQuoting() const { return SupportsQuotedNames; }
496
497  bool doesSupportDataRegionDirectives() const {
498    return UseDataRegionDirectives;
499  }
500
501  const char *getZeroDirective() const { return ZeroDirective; }
502  const char *getAsciiDirective() const { return AsciiDirective; }
503  const char *getAscizDirective() const { return AscizDirective; }
504  bool getAlignmentIsInBytes() const { return AlignmentIsInBytes; }
505  unsigned getTextAlignFillValue() const { return TextAlignFillValue; }
506  const char *getGlobalDirective() const { return GlobalDirective; }
507
508  bool doesSetDirectiveSuppressReloc() const {
509    return SetDirectiveSuppressesReloc;
510  }
511
512  bool hasAggressiveSymbolFolding() const { return HasAggressiveSymbolFolding; }
513
514  bool getCOMMDirectiveAlignmentIsInBytes() const {
515    return COMMDirectiveAlignmentIsInBytes;
516  }
517
518  LCOMM::LCOMMType getLCOMMDirectiveAlignmentType() const {
519    return LCOMMDirectiveAlignmentType;
520  }
521
522  bool hasFunctionAlignment() const { return HasFunctionAlignment; }
523  bool hasDotTypeDotSizeDirective() const { return HasDotTypeDotSizeDirective; }
524  bool hasSingleParameterDotFile() const { return HasSingleParameterDotFile; }
525  bool hasIdentDirective() const { return HasIdentDirective; }
526  bool hasNoDeadStrip() const { return HasNoDeadStrip; }
527  bool hasAltEntry() const { return HasAltEntry; }
528  const char *getWeakDirective() const { return WeakDirective; }
529  const char *getWeakRefDirective() const { return WeakRefDirective; }
530  bool hasWeakDefDirective() const { return HasWeakDefDirective; }
531
532  bool hasWeakDefCanBeHiddenDirective() const {
533    return HasWeakDefCanBeHiddenDirective;
534  }
535
536  bool hasLinkOnceDirective() const { return HasLinkOnceDirective; }
537
538  MCSymbolAttr getHiddenVisibilityAttr() const { return HiddenVisibilityAttr; }
539
540  MCSymbolAttr getHiddenDeclarationVisibilityAttr() const {
541    return HiddenDeclarationVisibilityAttr;
542  }
543
544  MCSymbolAttr getProtectedVisibilityAttr() const {
545    return ProtectedVisibilityAttr;
546  }
547
548  bool doesSupportDebugInformation() const { return SupportsDebugInformation; }
549
550  bool doesSupportExceptionHandling() const {
551    return ExceptionsType != ExceptionHandling::None;
552  }
553
554  ExceptionHandling getExceptionHandlingType() const { return ExceptionsType; }
555  WinEH::EncodingType getWinEHEncodingType() const { return WinEHEncodingType; }
556
557  void setExceptionsType(ExceptionHandling EH) {
558    ExceptionsType = EH;
559  }
560
561  /// Returns true if the exception handling method for the platform uses call
562  /// frame information to unwind.
563  bool usesCFIForEH() const {
564    return (ExceptionsType == ExceptionHandling::DwarfCFI ||
565            ExceptionsType == ExceptionHandling::ARM || usesWindowsCFI());
566  }
567
568  bool usesWindowsCFI() const {
569    return ExceptionsType == ExceptionHandling::WinEH &&
570           (WinEHEncodingType != WinEH::EncodingType::Invalid &&
571            WinEHEncodingType != WinEH::EncodingType::X86);
572  }
573
574  bool doesDwarfUseRelocationsAcrossSections() const {
575    return DwarfUsesRelocationsAcrossSections;
576  }
577
578  bool doDwarfFDESymbolsUseAbsDiff() const { return DwarfFDESymbolsUseAbsDiff; }
579  bool useDwarfRegNumForCFI() const { return DwarfRegNumForCFI; }
580  bool useParensForSymbolVariant() const { return UseParensForSymbolVariant; }
581
582  void addInitialFrameState(const MCCFIInstruction &Inst) {
583    InitialFrameState.push_back(Inst);
584  }
585
586  const std::vector<MCCFIInstruction> &getInitialFrameState() const {
587    return InitialFrameState;
588  }
589
590  /// Return true if assembly (inline or otherwise) should be parsed.
591  bool useIntegratedAssembler() const { return UseIntegratedAssembler; }
592
593  /// Set whether assembly (inline or otherwise) should be parsed.
594  virtual void setUseIntegratedAssembler(bool Value) {
595    UseIntegratedAssembler = Value;
596  }
597
598  /// Return true if assembly (inline or otherwise) should be parsed.
599  bool preserveAsmComments() const { return PreserveAsmComments; }
600
601  /// Set whether assembly (inline or otherwise) should be parsed.
602  virtual void setPreserveAsmComments(bool Value) {
603    PreserveAsmComments = Value;
604  }
605
606  DebugCompressionType compressDebugSections() const {
607    return CompressDebugSections;
608  }
609
610  void setCompressDebugSections(DebugCompressionType CompressDebugSections) {
611    this->CompressDebugSections = CompressDebugSections;
612  }
613
614  bool shouldUseLogicalShr() const { return UseLogicalShr; }
615
616  bool canRelaxRelocations() const { return RelaxELFRelocations; }
617  void setRelaxELFRelocations(bool V) { RelaxELFRelocations = V; }
618  bool hasMipsExpressions() const { return HasMipsExpressions; }
619};
620
621} // end namespace llvm
622
623#endif // LLVM_MC_MCASMINFO_H
624