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MCStreamer.h
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1 //===- MCStreamer.h - High-level Streaming Machine Code Output --*- 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 declares the MCStreamer class.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_MC_MCSTREAMER_H
15 #define LLVM_MC_MCSTREAMER_H
16 
17 #include "llvm/ADT/ArrayRef.h"
18 #include "llvm/ADT/DenseMap.h"
19 #include "llvm/ADT/Optional.h"
20 #include "llvm/ADT/SmallVector.h"
21 #include "llvm/ADT/StringRef.h"
22 #include "llvm/MC/MCDirectives.h"
23 #include "llvm/MC/MCDwarf.h"
25 #include "llvm/MC/MCSymbol.h"
26 #include "llvm/MC/MCWinEH.h"
27 #include "llvm/Support/Error.h"
28 #include "llvm/Support/MD5.h"
29 #include "llvm/Support/SMLoc.h"
31 #include <cassert>
32 #include <cstdint>
33 #include <memory>
34 #include <string>
35 #include <utility>
36 #include <vector>
37 
38 namespace llvm {
39 
40 class AssemblerConstantPools;
41 class formatted_raw_ostream;
42 class MCAsmBackend;
43 class MCCodeEmitter;
44 struct MCCodePaddingContext;
45 class MCContext;
46 class MCExpr;
47 class MCInst;
48 class MCInstPrinter;
49 class MCSection;
50 class MCStreamer;
51 class MCSymbolRefExpr;
52 class MCSubtargetInfo;
53 class raw_ostream;
54 class Twine;
55 
56 using MCSectionSubPair = std::pair<MCSection *, const MCExpr *>;
57 
58 /// Target specific streamer interface. This is used so that targets can
59 /// implement support for target specific assembly directives.
60 ///
61 /// If target foo wants to use this, it should implement 3 classes:
62 /// * FooTargetStreamer : public MCTargetStreamer
63 /// * FooTargetAsmStreamer : public FooTargetStreamer
64 /// * FooTargetELFStreamer : public FooTargetStreamer
65 ///
66 /// FooTargetStreamer should have a pure virtual method for each directive. For
67 /// example, for a ".bar symbol_name" directive, it should have
68 /// virtual emitBar(const MCSymbol &Symbol) = 0;
69 ///
70 /// The FooTargetAsmStreamer and FooTargetELFStreamer classes implement the
71 /// method. The assembly streamer just prints ".bar symbol_name". The object
72 /// streamer does whatever is needed to implement .bar in the object file.
73 ///
74 /// In the assembly printer and parser the target streamer can be used by
75 /// calling getTargetStreamer and casting it to FooTargetStreamer:
76 ///
77 /// MCTargetStreamer &TS = OutStreamer.getTargetStreamer();
78 /// FooTargetStreamer &ATS = static_cast<FooTargetStreamer &>(TS);
79 ///
80 /// The base classes FooTargetAsmStreamer and FooTargetELFStreamer should
81 /// *never* be treated differently. Callers should always talk to a
82 /// FooTargetStreamer.
84 protected:
86 
87 public:
89  virtual ~MCTargetStreamer();
90 
92 
93  // Allow a target to add behavior to the EmitLabel of MCStreamer.
94  virtual void emitLabel(MCSymbol *Symbol);
95  // Allow a target to add behavior to the emitAssignment of MCStreamer.
96  virtual void emitAssignment(MCSymbol *Symbol, const MCExpr *Value);
97 
98  virtual void prettyPrintAsm(MCInstPrinter &InstPrinter, raw_ostream &OS,
99  const MCInst &Inst, const MCSubtargetInfo &STI);
100 
101  virtual void emitDwarfFileDirective(StringRef Directive);
102 
103  /// Update streamer for a new active section.
104  ///
105  /// This is called by PopSection and SwitchSection, if the current
106  /// section changes.
107  virtual void changeSection(const MCSection *CurSection, MCSection *Section,
108  const MCExpr *SubSection, raw_ostream &OS);
109 
110  virtual void emitValue(const MCExpr *Value);
111 
112  /// Emit the bytes in \p Data into the output.
113  ///
114  /// This is used to emit bytes in \p Data as sequence of .byte directives.
115  virtual void emitRawBytes(StringRef Data);
116 
117  virtual void finish();
118 };
119 
120 // FIXME: declared here because it is used from
121 // lib/CodeGen/AsmPrinter/ARMException.cpp.
123 public:
125  ~ARMTargetStreamer() override;
126 
127  virtual void emitFnStart();
128  virtual void emitFnEnd();
129  virtual void emitCantUnwind();
130  virtual void emitPersonality(const MCSymbol *Personality);
131  virtual void emitPersonalityIndex(unsigned Index);
132  virtual void emitHandlerData();
133  virtual void emitSetFP(unsigned FpReg, unsigned SpReg,
134  int64_t Offset = 0);
135  virtual void emitMovSP(unsigned Reg, int64_t Offset = 0);
136  virtual void emitPad(int64_t Offset);
137  virtual void emitRegSave(const SmallVectorImpl<unsigned> &RegList,
138  bool isVector);
139  virtual void emitUnwindRaw(int64_t StackOffset,
140  const SmallVectorImpl<uint8_t> &Opcodes);
141 
142  virtual void switchVendor(StringRef Vendor);
143  virtual void emitAttribute(unsigned Attribute, unsigned Value);
144  virtual void emitTextAttribute(unsigned Attribute, StringRef String);
145  virtual void emitIntTextAttribute(unsigned Attribute, unsigned IntValue,
146  StringRef StringValue = "");
147  virtual void emitFPU(unsigned FPU);
148  virtual void emitArch(ARM::ArchKind Arch);
149  virtual void emitArchExtension(unsigned ArchExt);
150  virtual void emitObjectArch(ARM::ArchKind Arch);
151  void emitTargetAttributes(const MCSubtargetInfo &STI);
152  virtual void finishAttributeSection();
153  virtual void emitInst(uint32_t Inst, char Suffix = '\0');
154 
155  virtual void AnnotateTLSDescriptorSequence(const MCSymbolRefExpr *SRE);
156 
157  virtual void emitThumbSet(MCSymbol *Symbol, const MCExpr *Value);
158 
159  void finish() override;
160 
161  /// Reset any state between object emissions, i.e. the equivalent of
162  /// MCStreamer's reset method.
163  virtual void reset();
164 
165  /// Callback used to implement the ldr= pseudo.
166  /// Add a new entry to the constant pool for the current section and return an
167  /// MCExpr that can be used to refer to the constant pool location.
168  const MCExpr *addConstantPoolEntry(const MCExpr *, SMLoc Loc);
169 
170  /// Callback used to implemnt the .ltorg directive.
171  /// Emit contents of constant pool for the current section.
172  void emitCurrentConstantPool();
173 
174 private:
175  std::unique_ptr<AssemblerConstantPools> ConstantPools;
176 };
177 
178 /// Streaming machine code generation interface.
179 ///
180 /// This interface is intended to provide a programatic interface that is very
181 /// similar to the level that an assembler .s file provides. It has callbacks
182 /// to emit bytes, handle directives, etc. The implementation of this interface
183 /// retains state to know what the current section is etc.
184 ///
185 /// There are multiple implementations of this interface: one for writing out
186 /// a .s file, and implementations that write out .o files of various formats.
187 ///
188 class MCStreamer {
190  std::unique_ptr<MCTargetStreamer> TargetStreamer;
191 
192  std::vector<MCDwarfFrameInfo> DwarfFrameInfos;
193  MCDwarfFrameInfo *getCurrentDwarfFrameInfo();
194 
195  /// Similar to DwarfFrameInfos, but for SEH unwind info. Chained frames may
196  /// refer to each other, so use std::unique_ptr to provide pointer stability.
197  std::vector<std::unique_ptr<WinEH::FrameInfo>> WinFrameInfos;
198 
199  WinEH::FrameInfo *CurrentWinFrameInfo;
200 
201  /// Tracks an index to represent the order a symbol was emitted in.
202  /// Zero means we did not emit that symbol.
204 
205  /// This is stack of current and previous section values saved by
206  /// PushSection.
208 
209  /// The next unique ID to use when creating a WinCFI-related section (.pdata
210  /// or .xdata). This ID ensures that we have a one-to-one mapping from
211  /// code section to unwind info section, which MSVC's incremental linker
212  /// requires.
213  unsigned NextWinCFIID = 0;
214 
215  bool UseAssemblerInfoForParsing;
216 
217 protected:
218  MCStreamer(MCContext &Ctx);
219 
220  virtual void EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame);
221  virtual void EmitCFIEndProcImpl(MCDwarfFrameInfo &CurFrame);
222 
224  return CurrentWinFrameInfo;
225  }
226 
227  virtual void EmitWindowsUnwindTables();
228 
229  virtual void EmitRawTextImpl(StringRef String);
230 
231  /// Returns true if the the .cv_loc directive is in the right section.
232  bool checkCVLocSection(unsigned FuncId, unsigned FileNo, SMLoc Loc);
233 
234 public:
235  MCStreamer(const MCStreamer &) = delete;
236  MCStreamer &operator=(const MCStreamer &) = delete;
237  virtual ~MCStreamer();
238 
239  void visitUsedExpr(const MCExpr &Expr);
240  virtual void visitUsedSymbol(const MCSymbol &Sym);
241 
243  TargetStreamer.reset(TS);
244  }
245 
246  /// State management
247  ///
248  virtual void reset();
249 
250  MCContext &getContext() const { return Context; }
251 
252  virtual MCAssembler *getAssemblerPtr() { return nullptr; }
253 
254  void setUseAssemblerInfoForParsing(bool v) { UseAssemblerInfoForParsing = v; }
255  bool getUseAssemblerInfoForParsing() { return UseAssemblerInfoForParsing; }
256 
258  return TargetStreamer.get();
259  }
260 
261  /// When emitting an object file, create and emit a real label. When emitting
262  /// textual assembly, this should do nothing to avoid polluting our output.
263  virtual MCSymbol *EmitCFILabel();
264 
265  /// Retreive the current frame info if one is available and it is not yet
266  /// closed. Otherwise, issue an error and return null.
267  WinEH::FrameInfo *EnsureValidWinFrameInfo(SMLoc Loc);
268 
269  unsigned getNumFrameInfos() { return DwarfFrameInfos.size(); }
271  return DwarfFrameInfos;
272  }
273 
274  bool hasUnfinishedDwarfFrameInfo();
275 
276  unsigned getNumWinFrameInfos() { return WinFrameInfos.size(); }
278  return WinFrameInfos;
279  }
280 
281  void generateCompactUnwindEncodings(MCAsmBackend *MAB);
282 
283  /// \name Assembly File Formatting.
284  /// @{
285 
286  /// Return true if this streamer supports verbose assembly and if it is
287  /// enabled.
288  virtual bool isVerboseAsm() const { return false; }
289 
290  /// Return true if this asm streamer supports emitting unformatted text
291  /// to the .s file with EmitRawText.
292  virtual bool hasRawTextSupport() const { return false; }
293 
294  /// Is the integrated assembler required for this streamer to function
295  /// correctly?
296  virtual bool isIntegratedAssemblerRequired() const { return false; }
297 
298  /// Add a textual comment.
299  ///
300  /// Typically for comments that can be emitted to the generated .s
301  /// file if applicable as a QoI issue to make the output of the compiler
302  /// more readable. This only affects the MCAsmStreamer, and only when
303  /// verbose assembly output is enabled.
304  ///
305  /// If the comment includes embedded \n's, they will each get the comment
306  /// prefix as appropriate. The added comment should not end with a \n.
307  /// By default, each comment is terminated with an end of line, i.e. the
308  /// EOL param is set to true by default. If one prefers not to end the
309  /// comment with a new line then the EOL param should be passed
310  /// with a false value.
311  virtual void AddComment(const Twine &T, bool EOL = true) {}
312 
313  /// Return a raw_ostream that comments can be written to. Unlike
314  /// AddComment, you are required to terminate comments with \n if you use this
315  /// method.
316  virtual raw_ostream &GetCommentOS();
317 
318  /// Print T and prefix it with the comment string (normally #) and
319  /// optionally a tab. This prints the comment immediately, not at the end of
320  /// the current line. It is basically a safe version of EmitRawText: since it
321  /// only prints comments, the object streamer ignores it instead of asserting.
322  virtual void emitRawComment(const Twine &T, bool TabPrefix = true);
323 
324  /// Add explicit comment T. T is required to be a valid
325  /// comment in the output and does not need to be escaped.
326  virtual void addExplicitComment(const Twine &T);
327 
328  /// Emit added explicit comments.
329  virtual void emitExplicitComments();
330 
331  /// AddBlankLine - Emit a blank line to a .s file to pretty it up.
332  virtual void AddBlankLine() {}
333 
334  /// @}
335 
336  /// \name Symbol & Section Management
337  /// @{
338 
339  /// Return the current section that the streamer is emitting code to.
341  if (!SectionStack.empty())
342  return SectionStack.back().first;
343  return MCSectionSubPair();
344  }
345  MCSection *getCurrentSectionOnly() const { return getCurrentSection().first; }
346 
347  /// Return the previous section that the streamer is emitting code to.
349  if (!SectionStack.empty())
350  return SectionStack.back().second;
351  return MCSectionSubPair();
352  }
353 
354  /// Returns an index to represent the order a symbol was emitted in.
355  /// (zero if we did not emit that symbol)
356  unsigned GetSymbolOrder(const MCSymbol *Sym) const {
357  return SymbolOrdering.lookup(Sym);
358  }
359 
360  /// Update streamer for a new active section.
361  ///
362  /// This is called by PopSection and SwitchSection, if the current
363  /// section changes.
364  virtual void ChangeSection(MCSection *, const MCExpr *);
365 
366  /// Save the current and previous section on the section stack.
367  void PushSection() {
368  SectionStack.push_back(
369  std::make_pair(getCurrentSection(), getPreviousSection()));
370  }
371 
372  /// Restore the current and previous section from the section stack.
373  /// Calls ChangeSection as needed.
374  ///
375  /// Returns false if the stack was empty.
376  bool PopSection() {
377  if (SectionStack.size() <= 1)
378  return false;
379  auto I = SectionStack.end();
380  --I;
381  MCSectionSubPair OldSection = I->first;
382  --I;
383  MCSectionSubPair NewSection = I->first;
384 
385  if (OldSection != NewSection)
386  ChangeSection(NewSection.first, NewSection.second);
387  SectionStack.pop_back();
388  return true;
389  }
390 
391  bool SubSection(const MCExpr *Subsection) {
392  if (SectionStack.empty())
393  return false;
394 
395  SwitchSection(SectionStack.back().first.first, Subsection);
396  return true;
397  }
398 
399  /// Set the current section where code is being emitted to \p Section. This
400  /// is required to update CurSection.
401  ///
402  /// This corresponds to assembler directives like .section, .text, etc.
403  virtual void SwitchSection(MCSection *Section,
404  const MCExpr *Subsection = nullptr);
405 
406  /// Set the current section where code is being emitted to \p Section.
407  /// This is required to update CurSection. This version does not call
408  /// ChangeSection.
410  const MCExpr *Subsection = nullptr) {
411  assert(Section && "Cannot switch to a null section!");
412  MCSectionSubPair curSection = SectionStack.back().first;
413  SectionStack.back().second = curSection;
414  if (MCSectionSubPair(Section, Subsection) != curSection)
415  SectionStack.back().first = MCSectionSubPair(Section, Subsection);
416  }
417 
418  /// Create the default sections and set the initial one.
419  virtual void InitSections(bool NoExecStack);
420 
421  MCSymbol *endSection(MCSection *Section);
422 
423  /// Sets the symbol's section.
424  ///
425  /// Each emitted symbol will be tracked in the ordering table,
426  /// so we can sort on them later.
427  void AssignFragment(MCSymbol *Symbol, MCFragment *Fragment);
428 
429  /// Emit a label for \p Symbol into the current section.
430  ///
431  /// This corresponds to an assembler statement such as:
432  /// foo:
433  ///
434  /// \param Symbol - The symbol to emit. A given symbol should only be
435  /// emitted as a label once, and symbols emitted as a label should never be
436  /// used in an assignment.
437  // FIXME: These emission are non-const because we mutate the symbol to
438  // add the section we're emitting it to later.
439  virtual void EmitLabel(MCSymbol *Symbol, SMLoc Loc = SMLoc());
440 
441  virtual void EmitEHSymAttributes(const MCSymbol *Symbol, MCSymbol *EHSymbol);
442 
443  /// Note in the output the specified \p Flag.
444  virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
445 
446  /// Emit the given list \p Options of strings as linker
447  /// options into the output.
449 
450  /// Note in the output the specified region \p Kind.
452 
453  /// Specify the Mach-O minimum deployment target version.
454  virtual void EmitVersionMin(MCVersionMinType Type, unsigned Major,
455  unsigned Minor, unsigned Update) {}
456 
457  /// Emit/Specify Mach-O build version command.
458  /// \p Platform should be one of MachO::PlatformType.
459  virtual void EmitBuildVersion(unsigned Platform, unsigned Major,
460  unsigned Minor, unsigned Update) {}
461 
462  void EmitVersionForTarget(const Triple &Target);
463 
464  /// Note in the output that the specified \p Func is a Thumb mode
465  /// function (ARM target only).
466  virtual void EmitThumbFunc(MCSymbol *Func);
467 
468  /// Emit an assignment of \p Value to \p Symbol.
469  ///
470  /// This corresponds to an assembler statement such as:
471  /// symbol = value
472  ///
473  /// The assignment generates no code, but has the side effect of binding the
474  /// value in the current context. For the assembly streamer, this prints the
475  /// binding into the .s file.
476  ///
477  /// \param Symbol - The symbol being assigned to.
478  /// \param Value - The value for the symbol.
479  virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value);
480 
481  /// Emit an weak reference from \p Alias to \p Symbol.
482  ///
483  /// This corresponds to an assembler statement such as:
484  /// .weakref alias, symbol
485  ///
486  /// \param Alias - The alias that is being created.
487  /// \param Symbol - The symbol being aliased.
488  virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol);
489 
490  /// Add the given \p Attribute to \p Symbol.
491  virtual bool EmitSymbolAttribute(MCSymbol *Symbol,
492  MCSymbolAttr Attribute) = 0;
493 
494  /// Set the \p DescValue for the \p Symbol.
495  ///
496  /// \param Symbol - The symbol to have its n_desc field set.
497  /// \param DescValue - The value to set into the n_desc field.
498  virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue);
499 
500  /// Start emitting COFF symbol definition
501  ///
502  /// \param Symbol - The symbol to have its External & Type fields set.
503  virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol);
504 
505  /// Emit the storage class of the symbol.
506  ///
507  /// \param StorageClass - The storage class the symbol should have.
508  virtual void EmitCOFFSymbolStorageClass(int StorageClass);
509 
510  /// Emit the type of the symbol.
511  ///
512  /// \param Type - A COFF type identifier (see COFF::SymbolType in X86COFF.h)
513  virtual void EmitCOFFSymbolType(int Type);
514 
515  /// Marks the end of the symbol definition.
516  virtual void EndCOFFSymbolDef();
517 
518  virtual void EmitCOFFSafeSEH(MCSymbol const *Symbol);
519 
520  /// Emits the symbol table index of a Symbol into the current section.
521  virtual void EmitCOFFSymbolIndex(MCSymbol const *Symbol);
522 
523  /// Emits a COFF section index.
524  ///
525  /// \param Symbol - Symbol the section number relocation should point to.
526  virtual void EmitCOFFSectionIndex(MCSymbol const *Symbol);
527 
528  /// Emits a COFF section relative relocation.
529  ///
530  /// \param Symbol - Symbol the section relative relocation should point to.
531  virtual void EmitCOFFSecRel32(MCSymbol const *Symbol, uint64_t Offset);
532 
533  /// Emits a COFF image relative relocation.
534  ///
535  /// \param Symbol - Symbol the image relative relocation should point to.
536  virtual void EmitCOFFImgRel32(MCSymbol const *Symbol, int64_t Offset);
537 
538  /// Emit an ELF .size directive.
539  ///
540  /// This corresponds to an assembler statement such as:
541  /// .size symbol, expression
542  virtual void emitELFSize(MCSymbol *Symbol, const MCExpr *Value);
543 
544  /// Emit an ELF .symver directive.
545  ///
546  /// This corresponds to an assembler statement such as:
547  /// .symver _start, foo@@SOME_VERSION
548  /// \param AliasName - The versioned alias (i.e. "foo@@SOME_VERSION")
549  /// \param Aliasee - The aliased symbol (i.e. "_start")
550  virtual void emitELFSymverDirective(StringRef AliasName,
551  const MCSymbol *Aliasee);
552 
553  /// Emit a Linker Optimization Hint (LOH) directive.
554  /// \param Args - Arguments of the LOH.
555  virtual void EmitLOHDirective(MCLOHType Kind, const MCLOHArgs &Args) {}
556 
557  /// Emit a common symbol.
558  ///
559  /// \param Symbol - The common symbol to emit.
560  /// \param Size - The size of the common symbol.
561  /// \param ByteAlignment - The alignment of the symbol if
562  /// non-zero. This must be a power of 2.
563  virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
564  unsigned ByteAlignment) = 0;
565 
566  /// Emit a local common (.lcomm) symbol.
567  ///
568  /// \param Symbol - The common symbol to emit.
569  /// \param Size - The size of the common symbol.
570  /// \param ByteAlignment - The alignment of the common symbol in bytes.
571  virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
572  unsigned ByteAlignment);
573 
574  /// Emit the zerofill section and an optional symbol.
575  ///
576  /// \param Section - The zerofill section to create and or to put the symbol
577  /// \param Symbol - The zerofill symbol to emit, if non-NULL.
578  /// \param Size - The size of the zerofill symbol.
579  /// \param ByteAlignment - The alignment of the zerofill symbol if
580  /// non-zero. This must be a power of 2 on some targets.
581  virtual void EmitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr,
582  uint64_t Size = 0, unsigned ByteAlignment = 0,
583  SMLoc Loc = SMLoc()) = 0;
584 
585  /// Emit a thread local bss (.tbss) symbol.
586  ///
587  /// \param Section - The thread local common section.
588  /// \param Symbol - The thread local common symbol to emit.
589  /// \param Size - The size of the symbol.
590  /// \param ByteAlignment - The alignment of the thread local common symbol
591  /// if non-zero. This must be a power of 2 on some targets.
592  virtual void EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol,
593  uint64_t Size, unsigned ByteAlignment = 0);
594 
595  /// @}
596  /// \name Generating Data
597  /// @{
598 
599  /// Emit the bytes in \p Data into the output.
600  ///
601  /// This is used to implement assembler directives such as .byte, .ascii,
602  /// etc.
603  virtual void EmitBytes(StringRef Data);
604 
605  /// Functionally identical to EmitBytes. When emitting textual assembly, this
606  /// method uses .byte directives instead of .ascii or .asciz for readability.
607  virtual void EmitBinaryData(StringRef Data);
608 
609  /// Emit the expression \p Value into the output as a native
610  /// integer of the given \p Size bytes.
611  ///
612  /// This is used to implement assembler directives such as .word, .quad,
613  /// etc.
614  ///
615  /// \param Value - The value to emit.
616  /// \param Size - The size of the integer (in bytes) to emit. This must
617  /// match a native machine width.
618  /// \param Loc - The location of the expression for error reporting.
619  virtual void EmitValueImpl(const MCExpr *Value, unsigned Size,
620  SMLoc Loc = SMLoc());
621 
622  void EmitValue(const MCExpr *Value, unsigned Size, SMLoc Loc = SMLoc());
623 
624  /// Special case of EmitValue that avoids the client having
625  /// to pass in a MCExpr for constant integers.
626  virtual void EmitIntValue(uint64_t Value, unsigned Size);
627 
628  virtual void EmitULEB128Value(const MCExpr *Value);
629 
630  virtual void EmitSLEB128Value(const MCExpr *Value);
631 
632  /// Special case of EmitULEB128Value that avoids the client having to
633  /// pass in a MCExpr for constant integers.
634  void EmitULEB128IntValue(uint64_t Value);
635 
636  /// Special case of EmitSLEB128Value that avoids the client having to
637  /// pass in a MCExpr for constant integers.
638  void EmitSLEB128IntValue(int64_t Value);
639 
640  /// Special case of EmitValue that avoids the client having to pass in
641  /// a MCExpr for MCSymbols.
642  void EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
643  bool IsSectionRelative = false);
644 
645  /// Emit the expression \p Value into the output as a dtprel
646  /// (64-bit DTP relative) value.
647  ///
648  /// This is used to implement assembler directives such as .dtpreldword on
649  /// targets that support them.
650  virtual void EmitDTPRel64Value(const MCExpr *Value);
651 
652  /// Emit the expression \p Value into the output as a dtprel
653  /// (32-bit DTP relative) value.
654  ///
655  /// This is used to implement assembler directives such as .dtprelword on
656  /// targets that support them.
657  virtual void EmitDTPRel32Value(const MCExpr *Value);
658 
659  /// Emit the expression \p Value into the output as a tprel
660  /// (64-bit TP relative) value.
661  ///
662  /// This is used to implement assembler directives such as .tpreldword on
663  /// targets that support them.
664  virtual void EmitTPRel64Value(const MCExpr *Value);
665 
666  /// Emit the expression \p Value into the output as a tprel
667  /// (32-bit TP relative) value.
668  ///
669  /// This is used to implement assembler directives such as .tprelword on
670  /// targets that support them.
671  virtual void EmitTPRel32Value(const MCExpr *Value);
672 
673  /// Emit the expression \p Value into the output as a gprel64 (64-bit
674  /// GP relative) value.
675  ///
676  /// This is used to implement assembler directives such as .gpdword on
677  /// targets that support them.
678  virtual void EmitGPRel64Value(const MCExpr *Value);
679 
680  /// Emit the expression \p Value into the output as a gprel32 (32-bit
681  /// GP relative) value.
682  ///
683  /// This is used to implement assembler directives such as .gprel32 on
684  /// targets that support them.
685  virtual void EmitGPRel32Value(const MCExpr *Value);
686 
687  /// Emit NumBytes bytes worth of the value specified by FillValue.
688  /// This implements directives such as '.space'.
689  void emitFill(uint64_t NumBytes, uint8_t FillValue);
690 
691  /// Emit \p Size bytes worth of the value specified by \p FillValue.
692  ///
693  /// This is used to implement assembler directives such as .space or .skip.
694  ///
695  /// \param NumBytes - The number of bytes to emit.
696  /// \param FillValue - The value to use when filling bytes.
697  /// \param Loc - The location of the expression for error reporting.
698  virtual void emitFill(const MCExpr &NumBytes, uint64_t FillValue,
699  SMLoc Loc = SMLoc());
700 
701  /// Emit \p NumValues copies of \p Size bytes. Each \p Size bytes is
702  /// taken from the lowest order 4 bytes of \p Expr expression.
703  ///
704  /// This is used to implement assembler directives such as .fill.
705  ///
706  /// \param NumValues - The number of copies of \p Size bytes to emit.
707  /// \param Size - The size (in bytes) of each repeated value.
708  /// \param Expr - The expression from which \p Size bytes are used.
709  virtual void emitFill(const MCExpr &NumValues, int64_t Size, int64_t Expr,
710  SMLoc Loc = SMLoc());
711 
712  /// Emit NumBytes worth of zeros.
713  /// This function properly handles data in virtual sections.
714  void EmitZeros(uint64_t NumBytes);
715 
716  /// Emit some number of copies of \p Value until the byte alignment \p
717  /// ByteAlignment is reached.
718  ///
719  /// If the number of bytes need to emit for the alignment is not a multiple
720  /// of \p ValueSize, then the contents of the emitted fill bytes is
721  /// undefined.
722  ///
723  /// This used to implement the .align assembler directive.
724  ///
725  /// \param ByteAlignment - The alignment to reach. This must be a power of
726  /// two on some targets.
727  /// \param Value - The value to use when filling bytes.
728  /// \param ValueSize - The size of the integer (in bytes) to emit for
729  /// \p Value. This must match a native machine width.
730  /// \param MaxBytesToEmit - The maximum numbers of bytes to emit, or 0. If
731  /// the alignment cannot be reached in this many bytes, no bytes are
732  /// emitted.
733  virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
734  unsigned ValueSize = 1,
735  unsigned MaxBytesToEmit = 0);
736 
737  /// Emit nops until the byte alignment \p ByteAlignment is reached.
738  ///
739  /// This used to align code where the alignment bytes may be executed. This
740  /// can emit different bytes for different sizes to optimize execution.
741  ///
742  /// \param ByteAlignment - The alignment to reach. This must be a power of
743  /// two on some targets.
744  /// \param MaxBytesToEmit - The maximum numbers of bytes to emit, or 0. If
745  /// the alignment cannot be reached in this many bytes, no bytes are
746  /// emitted.
747  virtual void EmitCodeAlignment(unsigned ByteAlignment,
748  unsigned MaxBytesToEmit = 0);
749 
750  /// Emit some number of copies of \p Value until the byte offset \p
751  /// Offset is reached.
752  ///
753  /// This is used to implement assembler directives such as .org.
754  ///
755  /// \param Offset - The offset to reach. This may be an expression, but the
756  /// expression must be associated with the current section.
757  /// \param Value - The value to use when filling bytes.
758  virtual void emitValueToOffset(const MCExpr *Offset, unsigned char Value,
759  SMLoc Loc);
760 
761  virtual void
763 
764  virtual void
766 
767  /// @}
768 
769  /// Switch to a new logical file. This is used to implement the '.file
770  /// "foo.c"' assembler directive.
771  virtual void EmitFileDirective(StringRef Filename);
772 
773  /// Emit the "identifiers" directive. This implements the
774  /// '.ident "version foo"' assembler directive.
775  virtual void EmitIdent(StringRef IdentString) {}
776 
777  /// Associate a filename with a specified logical file number. This
778  /// implements the DWARF2 '.file 4 "foo.c"' assembler directive.
779  unsigned EmitDwarfFileDirective(unsigned FileNo, StringRef Directory,
780  StringRef Filename,
781  MD5::MD5Result *Checksum = nullptr,
783  unsigned CUID = 0) {
784  return cantFail(
785  tryEmitDwarfFileDirective(FileNo, Directory, Filename, Checksum,
786  Source, CUID));
787  }
788 
789  /// Associate a filename with a specified logical file number.
790  /// Also associate a directory, optional checksum, and optional source
791  /// text with the logical file. This implements the DWARF2
792  /// '.file 4 "dir/foo.c"' assembler directive, and the DWARF5
793  /// '.file 4 "dir/foo.c" md5 "..." source "..."' assembler directive.
794  virtual Expected<unsigned> tryEmitDwarfFileDirective(
795  unsigned FileNo, StringRef Directory, StringRef Filename,
796  MD5::MD5Result *Checksum = nullptr, Optional<StringRef> Source = None,
797  unsigned CUID = 0);
798 
799  /// Specify the "root" file of the compilation, using the ".file 0" extension.
800  virtual void emitDwarfFile0Directive(StringRef Directory, StringRef Filename,
801  MD5::MD5Result *Checksum,
803  unsigned CUID = 0);
804 
805  /// This implements the DWARF2 '.loc fileno lineno ...' assembler
806  /// directive.
807  virtual void EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
808  unsigned Column, unsigned Flags,
809  unsigned Isa, unsigned Discriminator,
810  StringRef FileName);
811 
812  /// Associate a filename with a specified logical file number, and also
813  /// specify that file's checksum information. This implements the '.cv_file 4
814  /// "foo.c"' assembler directive. Returns true on success.
815  virtual bool EmitCVFileDirective(unsigned FileNo, StringRef Filename,
816  ArrayRef<uint8_t> Checksum,
817  unsigned ChecksumKind);
818 
819  /// Introduces a function id for use with .cv_loc.
820  virtual bool EmitCVFuncIdDirective(unsigned FunctionId);
821 
822  /// Introduces an inline call site id for use with .cv_loc. Includes
823  /// extra information for inline line table generation.
824  virtual bool EmitCVInlineSiteIdDirective(unsigned FunctionId, unsigned IAFunc,
825  unsigned IAFile, unsigned IALine,
826  unsigned IACol, SMLoc Loc);
827 
828  /// This implements the CodeView '.cv_loc' assembler directive.
829  virtual void EmitCVLocDirective(unsigned FunctionId, unsigned FileNo,
830  unsigned Line, unsigned Column,
831  bool PrologueEnd, bool IsStmt,
832  StringRef FileName, SMLoc Loc);
833 
834  /// This implements the CodeView '.cv_linetable' assembler directive.
835  virtual void EmitCVLinetableDirective(unsigned FunctionId,
836  const MCSymbol *FnStart,
837  const MCSymbol *FnEnd);
838 
839  /// This implements the CodeView '.cv_inline_linetable' assembler
840  /// directive.
841  virtual void EmitCVInlineLinetableDirective(unsigned PrimaryFunctionId,
842  unsigned SourceFileId,
843  unsigned SourceLineNum,
844  const MCSymbol *FnStartSym,
845  const MCSymbol *FnEndSym);
846 
847  /// This implements the CodeView '.cv_def_range' assembler
848  /// directive.
849  virtual void EmitCVDefRangeDirective(
850  ArrayRef<std::pair<const MCSymbol *, const MCSymbol *>> Ranges,
851  StringRef FixedSizePortion);
852 
853  /// This implements the CodeView '.cv_stringtable' assembler directive.
854  virtual void EmitCVStringTableDirective() {}
855 
856  /// This implements the CodeView '.cv_filechecksums' assembler directive.
858 
859  /// This implements the CodeView '.cv_filechecksumoffset' assembler
860  /// directive.
861  virtual void EmitCVFileChecksumOffsetDirective(unsigned FileNo) {}
862 
863  /// This implements the CodeView '.cv_fpo_data' assembler directive.
864  virtual void EmitCVFPOData(const MCSymbol *ProcSym, SMLoc Loc = {}) {}
865 
866  /// Emit the absolute difference between two symbols.
867  ///
868  /// \pre Offset of \c Hi is greater than the offset \c Lo.
869  virtual void emitAbsoluteSymbolDiff(const MCSymbol *Hi, const MCSymbol *Lo,
870  unsigned Size);
871 
872  /// Emit the absolute difference between two symbols encoded with ULEB128.
873  virtual void emitAbsoluteSymbolDiffAsULEB128(const MCSymbol *Hi,
874  const MCSymbol *Lo);
875 
876  virtual MCSymbol *getDwarfLineTableSymbol(unsigned CUID);
877  virtual void EmitCFISections(bool EH, bool Debug);
878  void EmitCFIStartProc(bool IsSimple, SMLoc Loc = SMLoc());
879  void EmitCFIEndProc();
880  virtual void EmitCFIDefCfa(int64_t Register, int64_t Offset);
881  virtual void EmitCFIDefCfaOffset(int64_t Offset);
882  virtual void EmitCFIDefCfaRegister(int64_t Register);
883  virtual void EmitCFIOffset(int64_t Register, int64_t Offset);
884  virtual void EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding);
885  virtual void EmitCFILsda(const MCSymbol *Sym, unsigned Encoding);
886  virtual void EmitCFIRememberState();
887  virtual void EmitCFIRestoreState();
888  virtual void EmitCFISameValue(int64_t Register);
889  virtual void EmitCFIRestore(int64_t Register);
890  virtual void EmitCFIRelOffset(int64_t Register, int64_t Offset);
891  virtual void EmitCFIAdjustCfaOffset(int64_t Adjustment);
892  virtual void EmitCFIEscape(StringRef Values);
893  virtual void EmitCFIReturnColumn(int64_t Register);
894  virtual void EmitCFIGnuArgsSize(int64_t Size);
895  virtual void EmitCFISignalFrame();
896  virtual void EmitCFIUndefined(int64_t Register);
897  virtual void EmitCFIRegister(int64_t Register1, int64_t Register2);
898  virtual void EmitCFIWindowSave();
899 
900  virtual void EmitWinCFIStartProc(const MCSymbol *Symbol, SMLoc Loc = SMLoc());
901  virtual void EmitWinCFIEndProc(SMLoc Loc = SMLoc());
902  /// This is used on platforms, such as Windows on ARM64, that require function
903  /// or funclet sizes to be emitted in .xdata before the End marker is emitted
904  /// for the frame. We cannot use the End marker, as it is not set at the
905  /// point of emitting .xdata, in order to indicate that the frame is active.
906  virtual void EmitWinCFIFuncletOrFuncEnd(SMLoc Loc = SMLoc());
907  virtual void EmitWinCFIStartChained(SMLoc Loc = SMLoc());
908  virtual void EmitWinCFIEndChained(SMLoc Loc = SMLoc());
909  virtual void EmitWinCFIPushReg(unsigned Register, SMLoc Loc = SMLoc());
910  virtual void EmitWinCFISetFrame(unsigned Register, unsigned Offset,
911  SMLoc Loc = SMLoc());
912  virtual void EmitWinCFIAllocStack(unsigned Size, SMLoc Loc = SMLoc());
913  virtual void EmitWinCFISaveReg(unsigned Register, unsigned Offset,
914  SMLoc Loc = SMLoc());
915  virtual void EmitWinCFISaveXMM(unsigned Register, unsigned Offset,
916  SMLoc Loc = SMLoc());
917  virtual void EmitWinCFIPushFrame(bool Code, SMLoc Loc = SMLoc());
918  virtual void EmitWinCFIEndProlog(SMLoc Loc = SMLoc());
919  virtual void EmitWinEHHandler(const MCSymbol *Sym, bool Unwind, bool Except,
920  SMLoc Loc = SMLoc());
921  virtual void EmitWinEHHandlerData(SMLoc Loc = SMLoc());
922 
923  virtual void emitCGProfileEntry(const MCSymbolRefExpr *From,
924  const MCSymbolRefExpr *To, uint64_t Count);
925 
926  /// Get the .pdata section used for the given section. Typically the given
927  /// section is either the main .text section or some other COMDAT .text
928  /// section, but it may be any section containing code.
929  MCSection *getAssociatedPDataSection(const MCSection *TextSec);
930 
931  /// Get the .xdata section used for the given section.
932  MCSection *getAssociatedXDataSection(const MCSection *TextSec);
933 
934  virtual void EmitSyntaxDirective();
935 
936  /// Emit a .reloc directive.
937  /// Returns true if the relocation could not be emitted because Name is not
938  /// known.
939  virtual bool EmitRelocDirective(const MCExpr &Offset, StringRef Name,
940  const MCExpr *Expr, SMLoc Loc,
941  const MCSubtargetInfo &STI) {
942  return true;
943  }
944 
945  virtual void EmitAddrsig() {}
946  virtual void EmitAddrsigSym(const MCSymbol *Sym) {}
947 
948  /// Emit the given \p Instruction into the current section.
949  /// PrintSchedInfo == true then schedul comment should be added to output
950  virtual void EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI,
951  bool PrintSchedInfo = false);
952 
953  /// Set the bundle alignment mode from now on in the section.
954  /// The argument is the power of 2 to which the alignment is set. The
955  /// value 0 means turn the bundle alignment off.
956  virtual void EmitBundleAlignMode(unsigned AlignPow2);
957 
958  /// The following instructions are a bundle-locked group.
959  ///
960  /// \param AlignToEnd - If true, the bundle-locked group will be aligned to
961  /// the end of a bundle.
962  virtual void EmitBundleLock(bool AlignToEnd);
963 
964  /// Ends a bundle-locked group.
965  virtual void EmitBundleUnlock();
966 
967  /// If this file is backed by a assembly streamer, this dumps the
968  /// specified string in the output .s file. This capability is indicated by
969  /// the hasRawTextSupport() predicate. By default this aborts.
970  void EmitRawText(const Twine &String);
971 
972  /// Streamer specific finalization.
973  virtual void FinishImpl();
974  /// Finish emission of machine code.
975  void Finish();
976 
977  virtual bool mayHaveInstructions(MCSection &Sec) const { return true; }
978 };
979 
980 /// Create a dummy machine code streamer, which does nothing. This is useful for
981 /// timing the assembler front end.
983 
984 /// Create a machine code streamer which will print out assembly for the native
985 /// target, suitable for compiling with a native assembler.
986 ///
987 /// \param InstPrint - If given, the instruction printer to use. If not given
988 /// the MCInst representation will be printed. This method takes ownership of
989 /// InstPrint.
990 ///
991 /// \param CE - If given, a code emitter to use to show the instruction
992 /// encoding inline with the assembly. This method takes ownership of \p CE.
993 ///
994 /// \param TAB - If given, a target asm backend to use to show the fixup
995 /// information in conjunction with encoding information. This method takes
996 /// ownership of \p TAB.
997 ///
998 /// \param ShowInst - Whether to show the MCInst representation inline with
999 /// the assembly.
1001  std::unique_ptr<formatted_raw_ostream> OS,
1002  bool isVerboseAsm, bool useDwarfDirectory,
1003  MCInstPrinter *InstPrint, MCCodeEmitter *CE,
1004  MCAsmBackend *TAB, bool ShowInst);
1005 
1006 } // end namespace llvm
1007 
1008 #endif // LLVM_MC_MCSTREAMER_H
void cantFail(Error Err, const char *Msg=nullptr)
Report a fatal error if Err is a failure value.
Definition: Error.h:704
Profile::FuncID FuncId
Definition: Profile.cpp:321
Instances of this class represent a uniqued identifier for a section in the current translation unit...
Definition: MCSection.h:39
unsigned GetSymbolOrder(const MCSymbol *Sym) const
Returns an index to represent the order a symbol was emitted in.
Definition: MCStreamer.h:356
virtual void EmitCVStringTableDirective()
This implements the CodeView &#39;.cv_stringtable&#39; assembler directive.
Definition: MCStreamer.h:854
LLVMContext & Context
This class represents lattice values for constants.
Definition: AllocatorList.h:24
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:42
virtual void AddBlankLine()
AddBlankLine - Emit a blank line to a .s file to pretty it up.
Definition: MCStreamer.h:332
virtual void EmitAddrsigSym(const MCSymbol *Sym)
Definition: MCStreamer.h:946
void SwitchSectionNoChange(MCSection *Section, const MCExpr *Subsection=nullptr)
Set the current section where code is being emitted to Section.
Definition: MCStreamer.h:409
Target specific streamer interface.
Definition: MCStreamer.h:83
unsigned Reg
MCStreamer * createNullStreamer(MCContext &Ctx)
Create a dummy machine code streamer, which does nothing.
void PushSection()
Save the current and previous section on the section stack.
Definition: MCStreamer.h:367
virtual void EmitCVFPOData(const MCSymbol *ProcSym, SMLoc Loc={})
This implements the CodeView &#39;.cv_fpo_data&#39; assembler directive.
Definition: MCStreamer.h:864
virtual void emitValue(const MCExpr *Value)
Definition: MCStreamer.cpp:67
MCDataRegionType
Definition: MCDirectives.h:56
COFF::SymbolStorageClass StorageClass
Definition: COFFYAML.cpp:354
unsigned EmitDwarfFileDirective(unsigned FileNo, StringRef Directory, StringRef Filename, MD5::MD5Result *Checksum=nullptr, Optional< StringRef > Source=None, unsigned CUID=0)
Associate a filename with a specified logical file number.
Definition: MCStreamer.h:779
MCContext & getContext() const
Definition: MCStreamer.h:250
amdgpu Simplify well known AMD library false Value Value const Twine & Name
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:81
Base class for the full range of assembler expressions which are needed for parsing.
Definition: MCExpr.h:36
Represent a reference to a symbol from inside an expression.
Definition: MCExpr.h:166
Tagged union holding either a T or a Error.
Definition: CachePruning.h:23
virtual void emitLabel(MCSymbol *Symbol)
Definition: MCStreamer.cpp:49
unsigned getNumWinFrameInfos()
Definition: MCStreamer.h:276
ArrayRef< std::unique_ptr< WinEH::FrameInfo > > getWinFrameInfos() const
Definition: MCStreamer.h:277
Context object for machine code objects.
Definition: MCContext.h:63
MCSectionSubPair getPreviousSection() const
Return the previous section that the streamer is emitting code to.
Definition: MCStreamer.h:348
virtual void AddComment(const Twine &T, bool EOL=true)
Add a textual comment.
Definition: MCStreamer.h:311
virtual void EmitCVFileChecksumsDirective()
This implements the CodeView &#39;.cv_filechecksums&#39; assembler directive.
Definition: MCStreamer.h:857
virtual void finish()
Definition: MCStreamer.cpp:51
MCStreamer * createAsmStreamer(MCContext &Ctx, std::unique_ptr< formatted_raw_ostream > OS, bool isVerboseAsm, bool useDwarfDirectory, MCInstPrinter *InstPrint, MCCodeEmitter *CE, MCAsmBackend *TAB, bool ShowInst)
Create a machine code streamer which will print out assembly for the native target, suitable for compiling with a native assembler.
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory)...
Definition: APInt.h:33
bool getUseAssemblerInfoForParsing()
Definition: MCStreamer.h:255
Instances of this class represent a single low-level machine instruction.
Definition: MCInst.h:161
virtual MCAssembler * getAssemblerPtr()
Definition: MCStreamer.h:252
virtual bool hasRawTextSupport() const
Return true if this asm streamer supports emitting unformatted text to the .s file with EmitRawText...
Definition: MCStreamer.h:292
Flag
These should be considered private to the implementation of the MCInstrDesc class.
Definition: MCInstrDesc.h:118
Streaming machine code generation interface.
Definition: MCStreamer.h:188
WinEH::FrameInfo * getCurrentWinFrameInfo()
Definition: MCStreamer.h:223
MCTargetStreamer * getTargetStreamer()
Definition: MCStreamer.h:257
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:22
virtual void EmitCodePaddingBasicBlockStart(const MCCodePaddingContext &Context)
Definition: MCStreamer.h:762
MCLOHType
Linker Optimization Hint Type.
virtual bool mayHaveInstructions(MCSection &Sec) const
Definition: MCStreamer.h:977
void setUseAssemblerInfoForParsing(bool v)
Definition: MCStreamer.h:254
virtual void EmitAddrsig()
Definition: MCStreamer.h:945
virtual void EmitIdent(StringRef IdentString)
Emit the "identifiers" directive.
Definition: MCStreamer.h:775
size_t size() const
Definition: SmallVector.h:53
bool SubSection(const MCExpr *Subsection)
Definition: MCStreamer.h:391
virtual void EmitDataRegion(MCDataRegionType Kind)
Note in the output the specified region Kind.
Definition: MCStreamer.h:451
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:44
MCSectionSubPair getCurrentSection() const
Return the current section that the streamer is emitting code to.
Definition: MCStreamer.h:340
MCStreamer & getStreamer()
Definition: MCStreamer.h:91
std::pair< MCSection *, const MCExpr * > MCSectionSubPair
Definition: MCStreamer.h:56
BlockVerifier::State From
virtual void EmitLOHDirective(MCLOHType Kind, const MCLOHArgs &Args)
Emit a Linker Optimization Hint (LOH) directive.
Definition: MCStreamer.h:555
This is a &#39;vector&#39; (really, a variable-sized array), optimized for the case when the array is small...
Definition: SmallVector.h:847
bool isVector(MCInstrInfo const &MCII, MCInst const &MCI)
virtual bool EmitRelocDirective(const MCExpr &Offset, StringRef Name, const MCExpr *Expr, SMLoc Loc, const MCSubtargetInfo &STI)
Emit a .reloc directive.
Definition: MCStreamer.h:939
MCStreamer & Streamer
Definition: MCStreamer.h:85
Promote Memory to Register
Definition: Mem2Reg.cpp:110
virtual void prettyPrintAsm(MCInstPrinter &InstPrinter, raw_ostream &OS, const MCInst &Inst, const MCSubtargetInfo &STI)
Definition: MCStreamer.cpp:904
virtual void EmitBuildVersion(unsigned Platform, unsigned Major, unsigned Minor, unsigned Update)
Emit/Specify Mach-O build version command.
Definition: MCStreamer.h:459
MCSymbolAttr
Definition: MCDirectives.h:19
virtual void changeSection(const MCSection *CurSection, MCSection *Section, const MCExpr *SubSection, raw_ostream &OS)
Update streamer for a new active section.
Definition: MCStreamer.cpp:53
Target - Wrapper for Target specific information.
MCSection * getCurrentSectionOnly() const
Definition: MCStreamer.h:345
MCTargetStreamer(MCStreamer &S)
Definition: MCStreamer.cpp:42
virtual void EmitCVFileChecksumOffsetDirective(unsigned FileNo)
This implements the CodeView &#39;.cv_filechecksumoffset&#39; assembler directive.
Definition: MCStreamer.h:861
LLVM_ATTRIBUTE_ALWAYS_INLINE iterator end()
Definition: SmallVector.h:133
This is an instance of a target assembly language printer that converts an MCInst to valid target ass...
Definition: MCInstPrinter.h:40
unsigned getNumFrameInfos()
Definition: MCStreamer.h:269
virtual void EmitLinkerOptions(ArrayRef< std::string > Kind)
Emit the given list Options of strings as linker options into the output.
Definition: MCStreamer.h:448
LLVM_NODISCARD bool empty() const
Definition: SmallVector.h:56
MCAssemblerFlag
Definition: MCDirectives.h:48
#define I(x, y, z)
Definition: MD5.cpp:58
virtual void EmitCodePaddingBasicBlockEnd(const MCCodePaddingContext &Context)
Definition: MCStreamer.h:765
Generic base class for all target subtargets.
uint32_t Size
Definition: Profile.cpp:47
ValueT lookup(const_arg_type_t< KeyT > Val) const
lookup - Return the entry for the specified key, or a default constructed value if no such entry exis...
Definition: DenseMap.h:211
const unsigned Kind
virtual void emitRawBytes(StringRef Data)
Emit the bytes in Data into the output.
Definition: MCStreamer.cpp:75
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
bool PopSection()
Restore the current and previous section from the section stack.
Definition: MCStreamer.h:376
MCVersionMinType
Definition: MCDirectives.h:64
LLVM Value Representation.
Definition: Value.h:73
Generic interface to target specific assembler backends.
Definition: MCAsmBackend.h:42
ArrayRef< MCDwarfFrameInfo > getDwarfFrameInfos() const
Definition: MCStreamer.h:270
static cl::opt< bool, true > Debug("debug", cl::desc("Enable debug output"), cl::Hidden, cl::location(DebugFlag))
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:46
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:49
virtual void EmitVersionMin(MCVersionMinType Type, unsigned Major, unsigned Minor, unsigned Update)
Specify the Mach-O minimum deployment target version.
Definition: MCStreamer.h:454
virtual void emitDwarfFileDirective(StringRef Directive)
Definition: MCStreamer.cpp:63
Represents a location in source code.
Definition: SMLoc.h:24
virtual bool isVerboseAsm() const
Return true if this streamer supports verbose assembly and if it is enabled.
Definition: MCStreamer.h:288
void setTargetStreamer(MCTargetStreamer *TS)
Definition: MCStreamer.h:242
virtual void emitAssignment(MCSymbol *Symbol, const MCExpr *Value)
Definition: MCStreamer.cpp:87
constexpr char Args[]
Key for Kernel::Metadata::mArgs.
virtual bool isIntegratedAssemblerRequired() const
Is the integrated assembler required for this streamer to function correctly?
Definition: MCStreamer.h:296