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MCAssembler.h
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1 //===- MCAssembler.h - Object File Generation -------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef LLVM_MC_MCASSEMBLER_H
10 #define LLVM_MC_MCASSEMBLER_H
11 
12 #include "llvm/ADT/ArrayRef.h"
13 #include "llvm/ADT/STLExtras.h"
14 #include "llvm/ADT/SmallPtrSet.h"
15 #include "llvm/ADT/StringRef.h"
16 #include "llvm/ADT/iterator.h"
19 #include "llvm/MC/MCDirectives.h"
20 #include "llvm/MC/MCDwarf.h"
21 #include "llvm/MC/MCFixup.h"
22 #include "llvm/MC/MCFragment.h"
24 #include "llvm/MC/MCSymbol.h"
26 #include <cassert>
27 #include <cstddef>
28 #include <cstdint>
29 #include <string>
30 #include <utility>
31 #include <vector>
32 
33 namespace llvm {
34 
35 class MCAsmBackend;
36 class MCAsmLayout;
37 class MCContext;
38 class MCCodeEmitter;
39 class MCFragment;
40 class MCObjectWriter;
41 class MCSection;
42 class MCValue;
43 
44 // FIXME: This really doesn't belong here. See comments below.
48 };
49 
50 // FIXME: Ditto this. Purely so the Streamer and the ObjectWriter can talk
51 // to one another.
53  // This enum should be kept in sync w/ the mach-o definition in
54  // llvm/Object/MachOFormat.h.
55  enum KindTy { Data = 1, JumpTable8, JumpTable16, JumpTable32 } Kind;
58 };
59 
60 class MCAssembler {
61  friend class MCAsmLayout;
62 
63 public:
64  using SectionListType = std::vector<MCSection *>;
65  using SymbolDataListType = std::vector<const MCSymbol *>;
66 
69 
70  using const_symbol_iterator =
73 
76 
78  std::vector<IndirectSymbolData>::const_iterator;
79  using indirect_symbol_iterator = std::vector<IndirectSymbolData>::iterator;
80 
82  std::vector<DataRegionData>::const_iterator;
83  using data_region_iterator = std::vector<DataRegionData>::iterator;
84 
85  /// MachO specific deployment target version info.
86  // A Major version of 0 indicates that no version information was supplied
87  // and so the corresponding load command should not be emitted.
88  using VersionInfoType = struct {
89  bool EmitBuildVersion;
90  union {
91  MCVersionMinType Type; ///< Used when EmitBuildVersion==false.
92  MachO::PlatformType Platform; ///< Used when EmitBuildVersion==true.
93  } TypeOrPlatform;
94  unsigned Major;
95  unsigned Minor;
96  unsigned Update;
97  /// An optional version of the SDK that was used to build the source.
99  };
100 
101 private:
103 
104  std::unique_ptr<MCAsmBackend> Backend;
105 
106  std::unique_ptr<MCCodeEmitter> Emitter;
107 
108  std::unique_ptr<MCObjectWriter> Writer;
109 
110  SectionListType Sections;
111 
112  SymbolDataListType Symbols;
113 
114  std::vector<IndirectSymbolData> IndirectSymbols;
115 
116  std::vector<DataRegionData> DataRegions;
117 
118  /// The list of linker options to propagate into the object file.
119  std::vector<std::vector<std::string>> LinkerOptions;
120 
121  /// List of declared file names
122  std::vector<std::string> FileNames;
123 
124  MCDwarfLineTableParams LTParams;
125 
126  /// The set of function symbols for which a .thumb_func directive has
127  /// been seen.
128  //
129  // FIXME: We really would like this in target specific code rather than
130  // here. Maybe when the relocation stuff moves to target specific,
131  // this can go with it? The streamer would need some target specific
132  // refactoring too.
133  mutable SmallPtrSet<const MCSymbol *, 32> ThumbFuncs;
134 
135  /// The bundle alignment size currently set in the assembler.
136  ///
137  /// By default it's 0, which means bundling is disabled.
138  unsigned BundleAlignSize;
139 
140  bool RelaxAll : 1;
141  bool SubsectionsViaSymbols : 1;
142  bool IncrementalLinkerCompatible : 1;
143 
144  /// ELF specific e_header flags
145  // It would be good if there were an MCELFAssembler class to hold this.
146  // ELF header flags are used both by the integrated and standalone assemblers.
147  // Access to the flags is necessary in cases where assembler directives affect
148  // which flags to be set.
149  unsigned ELFHeaderEFlags;
150 
151  /// Used to communicate Linker Optimization Hint information between
152  /// the Streamer and the .o writer
153  MCLOHContainer LOHContainer;
154 
155  VersionInfoType VersionInfo;
156 
157  /// Evaluate a fixup to a relocatable expression and the value which should be
158  /// placed into the fixup.
159  ///
160  /// \param Layout The layout to use for evaluation.
161  /// \param Fixup The fixup to evaluate.
162  /// \param DF The fragment the fixup is inside.
163  /// \param Target [out] On return, the relocatable expression the fixup
164  /// evaluates to.
165  /// \param Value [out] On return, the value of the fixup as currently laid
166  /// out.
167  /// \param WasForced [out] On return, the value in the fixup is set to the
168  /// correct value if WasForced is true, even if evaluateFixup returns false.
169  /// \return Whether the fixup value was fully resolved. This is true if the
170  /// \p Value result is fixed, otherwise the value may change due to
171  /// relocation.
172  bool evaluateFixup(const MCAsmLayout &Layout, const MCFixup &Fixup,
173  const MCFragment *DF, MCValue &Target,
174  uint64_t &Value, bool &WasForced) const;
175 
176  /// Check whether a fixup can be satisfied, or whether it needs to be relaxed
177  /// (increased in size, in order to hold its value correctly).
178  bool fixupNeedsRelaxation(const MCFixup &Fixup, const MCRelaxableFragment *DF,
179  const MCAsmLayout &Layout) const;
180 
181  /// Check whether the given fragment needs relaxation.
182  bool fragmentNeedsRelaxation(const MCRelaxableFragment *IF,
183  const MCAsmLayout &Layout) const;
184 
185  /// Perform one layout iteration and return true if any offsets
186  /// were adjusted.
187  bool layoutOnce(MCAsmLayout &Layout);
188 
189  /// Perform one layout iteration of the given section and return true
190  /// if any offsets were adjusted.
191  bool layoutSectionOnce(MCAsmLayout &Layout, MCSection &Sec);
192 
193  bool relaxInstruction(MCAsmLayout &Layout, MCRelaxableFragment &IF);
194 
195  bool relaxPaddingFragment(MCAsmLayout &Layout, MCPaddingFragment &PF);
196 
197  bool relaxLEB(MCAsmLayout &Layout, MCLEBFragment &IF);
198 
199  bool relaxDwarfLineAddr(MCAsmLayout &Layout, MCDwarfLineAddrFragment &DF);
200  bool relaxDwarfCallFrameFragment(MCAsmLayout &Layout,
202  bool relaxCVInlineLineTable(MCAsmLayout &Layout,
204  bool relaxCVDefRange(MCAsmLayout &Layout, MCCVDefRangeFragment &DF);
205 
206  /// finishLayout - Finalize a layout, including fragment lowering.
207  void finishLayout(MCAsmLayout &Layout);
208 
209  std::tuple<MCValue, uint64_t, bool>
210  handleFixup(const MCAsmLayout &Layout, MCFragment &F, const MCFixup &Fixup);
211 
212 public:
213  std::vector<std::pair<StringRef, const MCSymbol *>> Symvers;
214 
215  /// Construct a new assembler instance.
216  //
217  // FIXME: How are we going to parameterize this? Two obvious options are stay
218  // concrete and require clients to pass in a target like object. The other
219  // option is to make this abstract, and have targets provide concrete
220  // implementations as we do with AsmParser.
221  MCAssembler(MCContext &Context, std::unique_ptr<MCAsmBackend> Backend,
222  std::unique_ptr<MCCodeEmitter> Emitter,
223  std::unique_ptr<MCObjectWriter> Writer);
224  MCAssembler(const MCAssembler &) = delete;
225  MCAssembler &operator=(const MCAssembler &) = delete;
226  ~MCAssembler();
227 
228  /// Compute the effective fragment size assuming it is laid out at the given
229  /// \p SectionAddress and \p FragmentOffset.
230  uint64_t computeFragmentSize(const MCAsmLayout &Layout,
231  const MCFragment &F) const;
232 
233  /// Find the symbol which defines the atom containing the given symbol, or
234  /// null if there is no such symbol.
235  const MCSymbol *getAtom(const MCSymbol &S) const;
236 
237  /// Check whether a particular symbol is visible to the linker and is required
238  /// in the symbol table, or whether it can be discarded by the assembler. This
239  /// also effects whether the assembler treats the label as potentially
240  /// defining a separate atom.
241  bool isSymbolLinkerVisible(const MCSymbol &SD) const;
242 
243  /// Emit the section contents to \p OS.
244  void writeSectionData(raw_ostream &OS, const MCSection *Section,
245  const MCAsmLayout &Layout) const;
246 
247  /// Check whether a given symbol has been flagged with .thumb_func.
248  bool isThumbFunc(const MCSymbol *Func) const;
249 
250  /// Flag a function symbol as the target of a .thumb_func directive.
251  void setIsThumbFunc(const MCSymbol *Func) { ThumbFuncs.insert(Func); }
252 
253  /// ELF e_header flags
254  unsigned getELFHeaderEFlags() const { return ELFHeaderEFlags; }
255  void setELFHeaderEFlags(unsigned Flags) { ELFHeaderEFlags = Flags; }
256 
257  /// MachO deployment target version information.
258  const VersionInfoType &getVersionInfo() const { return VersionInfo; }
259  void setVersionMin(MCVersionMinType Type, unsigned Major, unsigned Minor,
260  unsigned Update,
261  VersionTuple SDKVersion = VersionTuple()) {
262  VersionInfo.EmitBuildVersion = false;
263  VersionInfo.TypeOrPlatform.Type = Type;
264  VersionInfo.Major = Major;
265  VersionInfo.Minor = Minor;
266  VersionInfo.Update = Update;
267  VersionInfo.SDKVersion = SDKVersion;
268  }
269  void setBuildVersion(MachO::PlatformType Platform, unsigned Major,
270  unsigned Minor, unsigned Update,
271  VersionTuple SDKVersion = VersionTuple()) {
272  VersionInfo.EmitBuildVersion = true;
273  VersionInfo.TypeOrPlatform.Platform = Platform;
274  VersionInfo.Major = Major;
275  VersionInfo.Minor = Minor;
276  VersionInfo.Update = Update;
277  VersionInfo.SDKVersion = SDKVersion;
278  }
279 
280  /// Reuse an assembler instance
281  ///
282  void reset();
283 
284  MCContext &getContext() const { return Context; }
285 
286  MCAsmBackend *getBackendPtr() const { return Backend.get(); }
287 
288  MCCodeEmitter *getEmitterPtr() const { return Emitter.get(); }
289 
290  MCObjectWriter *getWriterPtr() const { return Writer.get(); }
291 
292  MCAsmBackend &getBackend() const { return *Backend; }
293 
294  MCCodeEmitter &getEmitter() const { return *Emitter; }
295 
296  MCObjectWriter &getWriter() const { return *Writer; }
297 
298  MCDwarfLineTableParams getDWARFLinetableParams() const { return LTParams; }
300 
301  /// Finish - Do final processing and write the object to the output stream.
302  /// \p Writer is used for custom object writer (as the MCJIT does),
303  /// if not specified it is automatically created from backend.
304  void Finish();
305 
306  // Layout all section and prepare them for emission.
307  void layout(MCAsmLayout &Layout);
308 
309  // FIXME: This does not belong here.
310  bool getSubsectionsViaSymbols() const { return SubsectionsViaSymbols; }
311  void setSubsectionsViaSymbols(bool Value) { SubsectionsViaSymbols = Value; }
312 
314  return IncrementalLinkerCompatible;
315  }
317  IncrementalLinkerCompatible = Value;
318  }
319 
320  bool getRelaxAll() const { return RelaxAll; }
321  void setRelaxAll(bool Value) { RelaxAll = Value; }
322 
323  bool isBundlingEnabled() const { return BundleAlignSize != 0; }
324 
325  unsigned getBundleAlignSize() const { return BundleAlignSize; }
326 
327  void setBundleAlignSize(unsigned Size) {
328  assert((Size == 0 || !(Size & (Size - 1))) &&
329  "Expect a power-of-two bundle align size");
330  BundleAlignSize = Size;
331  }
332 
333  /// \name Section List Access
334  /// @{
335 
336  iterator begin() { return Sections.begin(); }
337  const_iterator begin() const { return Sections.begin(); }
338 
339  iterator end() { return Sections.end(); }
340  const_iterator end() const { return Sections.end(); }
341 
342  size_t size() const { return Sections.size(); }
343 
344  /// @}
345  /// \name Symbol List Access
346  /// @{
347  symbol_iterator symbol_begin() { return Symbols.begin(); }
348  const_symbol_iterator symbol_begin() const { return Symbols.begin(); }
349 
350  symbol_iterator symbol_end() { return Symbols.end(); }
351  const_symbol_iterator symbol_end() const { return Symbols.end(); }
352 
353  symbol_range symbols() { return make_range(symbol_begin(), symbol_end()); }
355  return make_range(symbol_begin(), symbol_end());
356  }
357 
358  size_t symbol_size() const { return Symbols.size(); }
359 
360  /// @}
361  /// \name Indirect Symbol List Access
362  /// @{
363 
364  // FIXME: This is a total hack, this should not be here. Once things are
365  // factored so that the streamer has direct access to the .o writer, it can
366  // disappear.
367  std::vector<IndirectSymbolData> &getIndirectSymbols() {
368  return IndirectSymbols;
369  }
370 
372  return IndirectSymbols.begin();
373  }
375  return IndirectSymbols.begin();
376  }
377 
379  return IndirectSymbols.end();
380  }
382  return IndirectSymbols.end();
383  }
384 
385  size_t indirect_symbol_size() const { return IndirectSymbols.size(); }
386 
387  /// @}
388  /// \name Linker Option List Access
389  /// @{
390 
391  std::vector<std::vector<std::string>> &getLinkerOptions() {
392  return LinkerOptions;
393  }
394 
395  /// @}
396  /// \name Data Region List Access
397  /// @{
398 
399  // FIXME: This is a total hack, this should not be here. Once things are
400  // factored so that the streamer has direct access to the .o writer, it can
401  // disappear.
402  std::vector<DataRegionData> &getDataRegions() { return DataRegions; }
403 
404  data_region_iterator data_region_begin() { return DataRegions.begin(); }
406  return DataRegions.begin();
407  }
408 
409  data_region_iterator data_region_end() { return DataRegions.end(); }
411  return DataRegions.end();
412  }
413 
414  size_t data_region_size() const { return DataRegions.size(); }
415 
416  /// @}
417  /// \name Data Region List Access
418  /// @{
419 
420  // FIXME: This is a total hack, this should not be here. Once things are
421  // factored so that the streamer has direct access to the .o writer, it can
422  // disappear.
423  MCLOHContainer &getLOHContainer() { return LOHContainer; }
425  return const_cast<MCAssembler *>(this)->getLOHContainer();
426  }
427 
428  struct CGProfileEntry {
431  uint64_t Count;
432  };
433  std::vector<CGProfileEntry> CGProfile;
434  /// @}
435  /// \name Backend Data Access
436  /// @{
437 
438  bool registerSection(MCSection &Section);
439 
440  void registerSymbol(const MCSymbol &Symbol, bool *Created = nullptr);
441 
442  ArrayRef<std::string> getFileNames() { return FileNames; }
443 
444  void addFileName(StringRef FileName) {
445  if (!is_contained(FileNames, FileName))
446  FileNames.push_back(FileName);
447  }
448 
449  /// Write the necessary bundle padding to \p OS.
450  /// Expects a fragment \p F containing instructions and its size \p FSize.
451  void writeFragmentPadding(raw_ostream &OS, const MCEncodedFragment &F,
452  uint64_t FSize) const;
453 
454  /// @}
455 
456  void dump() const;
457 };
458 
459 /// Compute the amount of padding required before the fragment \p F to
460 /// obey bundling restrictions, where \p FOffset is the fragment's offset in
461 /// its section and \p FSize is the fragment's size.
462 uint64_t computeBundlePadding(const MCAssembler &Assembler,
463  const MCEncodedFragment *F, uint64_t FOffset,
464  uint64_t FSize);
465 
466 } // end namespace llvm
467 
468 #endif // LLVM_MC_MCASSEMBLER_H
void setIsThumbFunc(const MCSymbol *Func)
Flag a function symbol as the target of a .thumb_func directive.
Definition: MCAssembler.h:251
void setVersionMin(MCVersionMinType Type, unsigned Major, unsigned Minor, unsigned Update, VersionTuple SDKVersion=VersionTuple())
Definition: MCAssembler.h:259
void setELFHeaderEFlags(unsigned Flags)
Definition: MCAssembler.h:255
Instances of this class represent a uniqued identifier for a section in the current translation unit...
Definition: MCSection.h:39
Fragment for adding required padding.
Definition: MCFragment.h:342
LLVMContext & Context
This class represents lattice values for constants.
Definition: AllocatorList.h:23
MCObjectWriter * getWriterPtr() const
Definition: MCAssembler.h:290
This represents an "assembler immediate".
Definition: MCValue.h:39
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:41
iterator begin()
Definition: MCAssembler.h:336
const_symbol_iterator symbol_end() const
Definition: MCAssembler.h:351
This provides a very simple, boring adaptor for a begin and end iterator into a range type...
size_t symbol_size() const
Definition: MCAssembler.h:358
F(f)
std::vector< IndirectSymbolData > & getIndirectSymbols()
Definition: MCAssembler.h:367
const_data_region_iterator data_region_begin() const
Definition: MCAssembler.h:405
const_iterator end() const
Definition: MCAssembler.h:340
bool isBundlingEnabled() const
Definition: MCAssembler.h:323
Defines the object file and target independent interfaces used by the assembler backend to write nati...
symbol_iterator symbol_begin()
Definition: MCAssembler.h:347
std::vector< DataRegionData >::iterator data_region_iterator
Definition: MCAssembler.h:83
Encode information on a single operation to perform on a byte sequence (e.g., an encoded instruction)...
Definition: MCFixup.h:77
unsigned getBundleAlignSize() const
Definition: MCAssembler.h:325
const_indirect_symbol_iterator indirect_symbol_end() const
Definition: MCAssembler.h:381
MCContext & getContext() const
Definition: MCAssembler.h:284
Interface implemented by fragments that contain encoded instructions and/or data. ...
Definition: MCFragment.h:127
MCDwarfLineTableParams getDWARFLinetableParams() const
Definition: MCAssembler.h:298
Encapsulates the layout of an assembly file at a particular point in time.
Definition: MCAsmLayout.h:28
MCCodeEmitter & getEmitter() const
Definition: MCAssembler.h:294
void setRelaxAll(bool Value)
Definition: MCAssembler.h:321
const MCSymbolRefExpr * From
Definition: MCAssembler.h:429
static bool isThumbFunc(object::symbol_iterator Symbol, const object::ObjectFile &Obj, object::section_iterator Section)
Represent a reference to a symbol from inside an expression.
Definition: MCExpr.h:169
const MCLOHContainer & getLOHContainer() const
Definition: MCAssembler.h:424
MCObjectWriter & getWriter() const
Definition: MCAssembler.h:296
void setSubsectionsViaSymbols(bool Value)
Definition: MCAssembler.h:311
PlatformType
Definition: MachO.h:484
MCVersionMinType Type
Used when EmitBuildVersion==false.
Definition: MCAssembler.h:91
ArrayRef< std::string > getFileNames()
Definition: MCAssembler.h:442
Context object for machine code objects.
Definition: MCContext.h:65
void setDWARFLinetableParams(MCDwarfLineTableParams P)
Definition: MCAssembler.h:299
const_symbol_iterator symbol_begin() const
Definition: MCAssembler.h:348
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory)...
Definition: APInt.h:32
void setBundleAlignSize(unsigned Size)
Definition: MCAssembler.h:327
const MCSymbolRefExpr * To
Definition: MCAssembler.h:430
const VersionInfoType & getVersionInfo() const
MachO deployment target version information.
Definition: MCAssembler.h:258
iterator end()
Definition: MCAssembler.h:339
A relaxable fragment holds on to its MCInst, since it may need to be relaxed during the assembler lay...
Definition: MCFragment.h:272
#define P(N)
void dump(const SparseBitVector< ElementSize > &LHS, raw_ostream &out)
The instances of the Type class are immutable: once they are created, they are never changed...
Definition: Type.h:46
MCCodeEmitter - Generic instruction encoding interface.
Definition: MCCodeEmitter.h:21
std::pair< iterator, bool > insert(PtrType Ptr)
Inserts Ptr if and only if there is no element in the container equal to Ptr.
Definition: SmallPtrSet.h:370
struct { bool EmitBuildVersion VersionInfoType
MachO specific deployment target version info.
Definition: MCAssembler.h:89
MachO::PlatformType Platform
Used when EmitBuildVersion==true.
Definition: MCAssembler.h:92
std::vector< DataRegionData >::const_iterator const_data_region_iterator
Definition: MCAssembler.h:82
std::vector< IndirectSymbolData >::const_iterator const_indirect_symbol_iterator
Definition: MCAssembler.h:78
data_region_iterator data_region_begin()
Definition: MCAssembler.h:404
unsigned getELFHeaderEFlags() const
ELF e_header flags.
Definition: MCAssembler.h:254
std::vector< const MCSymbol * > SymbolDataListType
Definition: MCAssembler.h:65
Fragment representing the .cv_def_range directive.
Definition: MCFragment.h:631
size_t data_region_size() const
Definition: MCAssembler.h:414
const_indirect_symbol_iterator indirect_symbol_begin() const
Definition: MCAssembler.h:374
iterator_range< T > make_range(T x, T y)
Convenience function for iterating over sub-ranges.
std::vector< std::vector< std::string > > & getLinkerOptions()
Definition: MCAssembler.h:391
SmallPtrSet - This class implements a set which is optimized for holding SmallSize or less elements...
Definition: SmallPtrSet.h:417
indirect_symbol_iterator indirect_symbol_begin()
Definition: MCAssembler.h:371
MCAsmBackend * getBackendPtr() const
Definition: MCAssembler.h:286
void setIncrementalLinkerCompatible(bool Value)
Definition: MCAssembler.h:316
MCAsmBackend & getBackend() const
Definition: MCAssembler.h:292
An iterator type that allows iterating over the pointees via some other iterator. ...
Definition: iterator.h:286
bool getSubsectionsViaSymbols() const
Definition: MCAssembler.h:310
size_t indirect_symbol_size() const
Definition: MCAssembler.h:385
MCLOHContainer & getLOHContainer()
Definition: MCAssembler.h:423
void addFileName(StringRef FileName)
Definition: MCAssembler.h:444
uint64_t computeBundlePadding(const MCAssembler &Assembler, const MCEncodedFragment *F, uint64_t FOffset, uint64_t FSize)
Compute the amount of padding required before the fragment F to obey bundling restrictions, where FOffset is the fragment&#39;s offset in its section and FSize is the fragment&#39;s size.
Definition: MCFragment.cpp:190
VersionTuple SDKVersion
An optional version of the SDK that was used to build the source.
Definition: MCAssembler.h:98
bool getRelaxAll() const
Definition: MCAssembler.h:320
A range adaptor for a pair of iterators.
Target - Wrapper for Target specific information.
const_iterator begin() const
Definition: MCAssembler.h:337
Fragment representing the binary annotations produced by the .cv_inline_linetable directive...
Definition: MCFragment.h:593
std::vector< CGProfileEntry > CGProfile
Definition: MCAssembler.h:433
Represents a version number in the form major[.minor[.subminor[.build]]].
Definition: VersionTuple.h:26
const_data_region_iterator data_region_end() const
Definition: MCAssembler.h:410
static LocationDescriptor layout(BlobAllocator &File, yaml::BinaryRef Data)
uint32_t Size
Definition: Profile.cpp:46
symbol_range symbols()
Definition: MCAssembler.h:353
data_region_iterator data_region_end()
Definition: MCAssembler.h:409
size_t size() const
Definition: MCAssembler.h:342
std::vector< IndirectSymbolData >::iterator indirect_symbol_iterator
Definition: MCAssembler.h:79
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
bool isIncrementalLinkerCompatible() const
Definition: MCAssembler.h:313
MCVersionMinType
Definition: MCDirectives.h:65
LLVM Value Representation.
Definition: Value.h:73
Generic interface to target specific assembler backends.
Definition: MCAsmBackend.h:41
indirect_symbol_iterator indirect_symbol_end()
Definition: MCAssembler.h:378
Defines the llvm::VersionTuple class, which represents a version in the form major[.minor[.subminor]].
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:45
const_symbol_range symbols() const
Definition: MCAssembler.h:354
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
std::vector< DataRegionData > & getDataRegions()
Definition: MCAssembler.h:402
std::vector< MCSection * > SectionListType
Definition: MCAssembler.h:64
void setBuildVersion(MachO::PlatformType Platform, unsigned Major, unsigned Minor, unsigned Update, VersionTuple SDKVersion=VersionTuple())
Definition: MCAssembler.h:269
std::vector< std::pair< StringRef, const MCSymbol * > > Symvers
Definition: MCAssembler.h:213
MCCodeEmitter * getEmitterPtr() const
Definition: MCAssembler.h:288
symbol_iterator symbol_end()
Definition: MCAssembler.h:350
bool is_contained(R &&Range, const E &Element)
Wrapper function around std::find to detect if an element exists in a container.
Definition: STLExtras.h:1224