1 //===- llvm/CodeGen/AsmPrinter.h - AsmPrinter Framework ---------*- C++ -*-===//
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
7 //===----------------------------------------------------------------------===//
9 // This file contains a class to be used as the base class for target specific
10 // asm writers. This class primarily handles common functionality used by
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_CODEGEN_ASMPRINTER_H
16 #define LLVM_CODEGEN_ASMPRINTER_H
18 #include "llvm/ADT/MapVector.h"
19 #include "llvm/ADT/SmallVector.h"
20 #include "llvm/ADT/StringRef.h"
21 #include "llvm/ADT/Twine.h"
22 #include "llvm/CodeGen/AsmPrinterHandler.h"
23 #include "llvm/CodeGen/DwarfStringPoolEntry.h"
24 #include "llvm/CodeGen/MachineFunctionPass.h"
25 #include "llvm/IR/InlineAsm.h"
26 #include "llvm/IR/LLVMContext.h"
27 #include "llvm/Support/ErrorHandling.h"
28 #include "llvm/Support/SourceMgr.h"
44 class GCMetadataPrinter;
46 class GlobalIndirectSymbol;
50 class MachineBasicBlock;
51 class MachineBlockFrequencyInfo;
52 class MachineConstantPoolValue;
53 class MachineDominatorTree;
54 class MachineFunction;
56 class MachineJumpTableInfo;
57 class MachineLoopInfo;
58 class MachineModuleInfo;
59 class MachineOptimizationRemarkEmitter;
61 class MCCFIInstruction;
67 class MCSubtargetInfo;
69 class MCTargetOptions;
72 class ProfileSummaryInfo;
76 class TargetLoweringObjectFile;
79 /// This class is intended to be used as a driving class for all asm writers.
80 class AsmPrinter : public MachineFunctionPass {
82 /// Target machine description.
85 /// Target Asm Printer information.
88 /// This is the context for the output file that we are streaming. This owns
89 /// all of the global MC-related objects for the generated translation unit.
90 MCContext &OutContext;
92 /// This is the MCStreamer object for the file we are generating. This
93 /// contains the transient state for the current translation unit that we are
94 /// generating (such as the current section etc).
95 std::unique_ptr<MCStreamer> OutStreamer;
97 /// The current machine function.
98 MachineFunction *MF = nullptr;
100 /// This is a pointer to the current MachineModuleInfo.
101 MachineModuleInfo *MMI = nullptr;
103 /// This is a pointer to the current MachineLoopInfo.
104 MachineDominatorTree *MDT = nullptr;
106 /// This is a pointer to the current MachineLoopInfo.
107 MachineLoopInfo *MLI = nullptr;
109 /// Optimization remark emitter.
110 MachineOptimizationRemarkEmitter *ORE;
112 MachineBlockFrequencyInfo *MBFI;
114 ProfileSummaryInfo *PSI;
116 /// The symbol for the entry in __patchable_function_entires.
117 MCSymbol *CurrentPatchableFunctionEntrySym = nullptr;
119 /// The symbol for the current function. This is recalculated at the beginning
120 /// of each call to runOnMachineFunction().
121 MCSymbol *CurrentFnSym = nullptr;
123 /// The symbol for the current function descriptor on AIX. This is created
124 /// at the beginning of each call to SetupMachineFunction().
125 MCSymbol *CurrentFnDescSym = nullptr;
127 /// The symbol used to represent the start of the current function for the
128 /// purpose of calculating its size (e.g. using the .size directive). By
129 /// default, this is equal to CurrentFnSym.
130 MCSymbol *CurrentFnSymForSize = nullptr;
132 /// Map global GOT equivalent MCSymbols to GlobalVariables and keep track of
133 /// its number of uses by other globals.
134 using GOTEquivUsePair = std::pair<const GlobalVariable *, unsigned>;
135 MapVector<const MCSymbol *, GOTEquivUsePair> GlobalGOTEquivs;
138 MCSymbol *CurrentFnBegin = nullptr;
139 MCSymbol *CurrentFnEnd = nullptr;
140 MCSymbol *CurExceptionSym = nullptr;
142 // The garbage collection metadata printer table.
143 void *GCMetadataPrinters = nullptr; // Really a DenseMap.
145 /// Emit comments in assembly output if this is true.
151 /// Protected struct HandlerInfo and Handlers permit target extended
152 /// AsmPrinter adds their own handlers.
154 std::unique_ptr<AsmPrinterHandler> Handler;
155 const char *TimerName;
156 const char *TimerDescription;
157 const char *TimerGroupName;
158 const char *TimerGroupDescription;
160 HandlerInfo(std::unique_ptr<AsmPrinterHandler> Handler,
161 const char *TimerName, const char *TimerDescription,
162 const char *TimerGroupName, const char *TimerGroupDescription)
163 : Handler(std::move(Handler)), TimerName(TimerName),
164 TimerDescription(TimerDescription), TimerGroupName(TimerGroupName),
165 TimerGroupDescription(TimerGroupDescription) {}
168 /// A vector of all debug/EH info emitters we should use. This vector
169 /// maintains ownership of the emitters.
170 SmallVector<HandlerInfo, 1> Handlers;
173 struct SrcMgrDiagInfo {
175 std::vector<const MDNode *> LocInfos;
176 LLVMContext::InlineAsmDiagHandlerTy DiagHandler;
181 /// If generated on the fly this own the instance.
182 std::unique_ptr<MachineDominatorTree> OwnedMDT;
184 /// If generated on the fly this own the instance.
185 std::unique_ptr<MachineLoopInfo> OwnedMLI;
187 /// Structure for generating diagnostics for inline assembly. Only initialised
189 mutable std::unique_ptr<SrcMgrDiagInfo> DiagInfo;
191 /// If the target supports dwarf debug info, this pointer is non-null.
192 DwarfDebug *DD = nullptr;
194 /// If the current module uses dwarf CFI annotations strictly for debugging.
195 bool isCFIMoveForDebugging = false;
198 explicit AsmPrinter(TargetMachine &TM, std::unique_ptr<MCStreamer> Streamer);
201 ~AsmPrinter() override;
203 DwarfDebug *getDwarfDebug() { return DD; }
204 DwarfDebug *getDwarfDebug() const { return DD; }
206 uint16_t getDwarfVersion() const;
207 void setDwarfVersion(uint16_t Version);
209 bool isPositionIndependent() const;
211 /// Return true if assembly output should contain comments.
212 bool isVerbose() const { return VerboseAsm; }
214 /// Return a unique ID for the current function.
215 unsigned getFunctionNumber() const;
217 /// Return symbol for the function pseudo stack if the stack frame is not a
219 virtual const MCSymbol *getFunctionFrameSymbol() const { return nullptr; }
221 MCSymbol *getFunctionBegin() const { return CurrentFnBegin; }
222 MCSymbol *getFunctionEnd() const { return CurrentFnEnd; }
223 MCSymbol *getCurExceptionSym();
225 /// Return information about object file lowering.
226 const TargetLoweringObjectFile &getObjFileLowering() const;
228 /// Return information about data layout.
229 const DataLayout &getDataLayout() const;
231 /// Return the pointer size from the TargetMachine
232 unsigned getPointerSize() const;
234 /// Return information about subtarget.
235 const MCSubtargetInfo &getSubtargetInfo() const;
237 void EmitToStreamer(MCStreamer &S, const MCInst &Inst);
239 /// Emits inital debug location directive.
240 void emitInitialRawDwarfLocDirective(const MachineFunction &MF);
242 /// Return the current section we are emitting to.
243 const MCSection *getCurrentSection() const;
245 void getNameWithPrefix(SmallVectorImpl<char> &Name,
246 const GlobalValue *GV) const;
248 MCSymbol *getSymbol(const GlobalValue *GV) const;
250 //===------------------------------------------------------------------===//
251 // XRay instrumentation implementation.
252 //===------------------------------------------------------------------===//
254 // This describes the kind of sled we're storing in the XRay table.
255 enum class SledKind : uint8_t {
264 // The table will contain these structs that point to the sled, the function
265 // containing the sled, and what kind of sled (and whether they should always
266 // be instrumented). We also use a version identifier that the runtime can use
267 // to decide what to do with the sled, depending on the version of the sled.
268 struct XRayFunctionEntry {
269 const MCSymbol *Sled;
270 const MCSymbol *Function;
272 bool AlwaysInstrument;
273 const class Function *Fn;
276 void emit(int, MCStreamer *, const MCSymbol *) const;
279 // All the sleds to be emitted.
280 SmallVector<XRayFunctionEntry, 4> Sleds;
282 // A unique ID used for ELF sections associated with a particular function.
283 unsigned XRayFnUniqueID = 0;
285 // Helper function to record a given XRay sled.
286 void recordSled(MCSymbol *Sled, const MachineInstr &MI, SledKind Kind,
287 uint8_t Version = 0);
289 /// Emit a table with all XRay instrumentation points.
290 void emitXRayTable();
292 DenseMap<const MCSection *, unsigned> PatchableFunctionEntryID;
293 void emitPatchableFunctionEntries();
295 //===------------------------------------------------------------------===//
296 // MachineFunctionPass Implementation.
297 //===------------------------------------------------------------------===//
299 /// Record analysis usage.
300 void getAnalysisUsage(AnalysisUsage &AU) const override;
302 /// Set up the AsmPrinter when we are working on a new module. If your pass
303 /// overrides this, it must make sure to explicitly call this implementation.
304 bool doInitialization(Module &M) override;
306 /// Shut down the asmprinter. If you override this in your pass, you must make
307 /// sure to call it explicitly.
308 bool doFinalization(Module &M) override;
310 /// Emit the specified function out to the OutStreamer.
311 bool runOnMachineFunction(MachineFunction &MF) override {
312 SetupMachineFunction(MF);
317 //===------------------------------------------------------------------===//
318 // Coarse grained IR lowering routines.
319 //===------------------------------------------------------------------===//
321 /// This should be called when a new MachineFunction is being processed from
322 /// runOnMachineFunction.
323 virtual void SetupMachineFunction(MachineFunction &MF);
325 /// This method emits the body and trailer for a function.
326 void EmitFunctionBody();
328 void emitCFIInstruction(const MachineInstr &MI);
330 void emitFrameAlloc(const MachineInstr &MI);
332 void emitStackSizeSection(const MachineFunction &MF);
334 void emitRemarksSection(RemarkStreamer &RS);
336 enum CFIMoveType { CFI_M_None, CFI_M_EH, CFI_M_Debug };
337 CFIMoveType needsCFIMoves() const;
339 /// Returns false if needsCFIMoves() == CFI_M_EH for any function
341 bool needsOnlyDebugCFIMoves() const { return isCFIMoveForDebugging; }
343 bool needsSEHMoves();
345 /// Print to the current output stream assembly representations of the
346 /// constants in the constant pool MCP. This is used to print out constants
347 /// which have been "spilled to memory" by the code generator.
348 virtual void EmitConstantPool();
350 /// Print assembly representations of the jump tables used by the current
351 /// function to the current output stream.
352 virtual void EmitJumpTableInfo();
354 /// Emit the specified global variable to the .s file.
355 virtual void EmitGlobalVariable(const GlobalVariable *GV);
357 /// Check to see if the specified global is a special global used by LLVM. If
358 /// so, emit it and return true, otherwise do nothing and return false.
359 bool EmitSpecialLLVMGlobal(const GlobalVariable *GV);
361 /// Emit an alignment directive to the specified power of two boundary. If a
362 /// global value is specified, and if that global has an explicit alignment
363 /// requested, it will override the alignment request if required for
365 void EmitAlignment(Align Alignment, const GlobalObject *GV = nullptr) const;
367 /// Lower the specified LLVM Constant to an MCExpr.
368 virtual const MCExpr *lowerConstant(const Constant *CV);
370 /// Print a general LLVM constant to the .s file.
371 void EmitGlobalConstant(const DataLayout &DL, const Constant *CV);
373 /// Unnamed constant global variables solely contaning a pointer to
374 /// another globals variable act like a global variable "proxy", or GOT
375 /// equivalents, i.e., it's only used to hold the address of the latter. One
376 /// optimization is to replace accesses to these proxies by using the GOT
377 /// entry for the final global instead. Hence, we select GOT equivalent
378 /// candidates among all the module global variables, avoid emitting them
379 /// unnecessarily and finally replace references to them by pc relative
380 /// accesses to GOT entries.
381 void computeGlobalGOTEquivs(Module &M);
383 /// Constant expressions using GOT equivalent globals may not be
384 /// eligible for PC relative GOT entry conversion, in such cases we need to
385 /// emit the proxies we previously omitted in EmitGlobalVariable.
386 void emitGlobalGOTEquivs();
388 /// Emit the stack maps.
389 void emitStackMaps(StackMaps &SM);
391 //===------------------------------------------------------------------===//
393 //===------------------------------------------------------------------===//
395 // Targets can, or in the case of EmitInstruction, must implement these to
398 /// This virtual method can be overridden by targets that want to emit
399 /// something at the start of their file.
400 virtual void EmitStartOfAsmFile(Module &) {}
402 /// This virtual method can be overridden by targets that want to emit
403 /// something at the end of their file.
404 virtual void EmitEndOfAsmFile(Module &) {}
406 /// Targets can override this to emit stuff before the first basic block in
408 virtual void EmitFunctionBodyStart() {}
410 /// Targets can override this to emit stuff after the last basic block in the
412 virtual void EmitFunctionBodyEnd() {}
414 /// Targets can override this to emit stuff at the start of a basic block.
415 /// By default, this method prints the label for the specified
416 /// MachineBasicBlock, an alignment (if present) and a comment describing it
418 virtual void EmitBasicBlockStart(const MachineBasicBlock &MBB);
420 /// Targets can override this to emit stuff at the end of a basic block.
421 virtual void EmitBasicBlockEnd(const MachineBasicBlock &MBB);
423 /// Targets should implement this to emit instructions.
424 virtual void EmitInstruction(const MachineInstr *) {
425 llvm_unreachable("EmitInstruction not implemented");
428 /// Return the symbol for the specified constant pool entry.
429 virtual MCSymbol *GetCPISymbol(unsigned CPID) const;
431 virtual void EmitFunctionEntryLabel();
433 virtual void EmitFunctionDescriptor() {
434 llvm_unreachable("Function descriptor is target-specific.");
437 virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV);
439 /// Targets can override this to change how global constants that are part of
440 /// a C++ static/global constructor list are emitted.
441 virtual void EmitXXStructor(const DataLayout &DL, const Constant *CV) {
442 EmitGlobalConstant(DL, CV);
445 /// Return true if the basic block has exactly one predecessor and the control
446 /// transfer mechanism between the predecessor and this block is a
449 isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB) const;
451 /// Targets can override this to customize the output of IMPLICIT_DEF
452 /// instructions in verbose mode.
453 virtual void emitImplicitDef(const MachineInstr *MI) const;
455 /// Emit N NOP instructions.
456 void emitNops(unsigned N);
458 //===------------------------------------------------------------------===//
459 // Symbol Lowering Routines.
460 //===------------------------------------------------------------------===//
462 MCSymbol *createTempSymbol(const Twine &Name) const;
464 /// Return the MCSymbol for a private symbol with global value name as its
465 /// base, with the specified suffix.
466 MCSymbol *getSymbolWithGlobalValueBase(const GlobalValue *GV,
467 StringRef Suffix) const;
469 /// Return the MCSymbol for the specified ExternalSymbol.
470 MCSymbol *GetExternalSymbolSymbol(StringRef Sym) const;
472 /// Return the symbol for the specified jump table entry.
473 MCSymbol *GetJTISymbol(unsigned JTID, bool isLinkerPrivate = false) const;
475 /// Return the symbol for the specified jump table .set
476 /// FIXME: privatize to AsmPrinter.
477 MCSymbol *GetJTSetSymbol(unsigned UID, unsigned MBBID) const;
479 /// Return the MCSymbol used to satisfy BlockAddress uses of the specified
481 MCSymbol *GetBlockAddressSymbol(const BlockAddress *BA) const;
482 MCSymbol *GetBlockAddressSymbol(const BasicBlock *BB) const;
484 //===------------------------------------------------------------------===//
485 // Emission Helper Routines.
486 //===------------------------------------------------------------------===//
488 /// This is just convenient handler for printing offsets.
489 void printOffset(int64_t Offset, raw_ostream &OS) const;
491 /// Emit a byte directive and value.
492 void emitInt8(int Value) const;
494 /// Emit a short directive and value.
495 void emitInt16(int Value) const;
497 /// Emit a long directive and value.
498 void emitInt32(int Value) const;
500 /// Emit a long long directive and value.
501 void emitInt64(uint64_t Value) const;
503 /// Emit something like ".long Hi-Lo" where the size in bytes of the directive
504 /// is specified by Size and Hi/Lo specify the labels. This implicitly uses
505 /// .set if it is available.
506 void EmitLabelDifference(const MCSymbol *Hi, const MCSymbol *Lo,
507 unsigned Size) const;
509 /// Emit something like ".uleb128 Hi-Lo".
510 void EmitLabelDifferenceAsULEB128(const MCSymbol *Hi,
511 const MCSymbol *Lo) const;
513 /// Emit something like ".long Label+Offset" where the size in bytes of the
514 /// directive is specified by Size and Label specifies the label. This
515 /// implicitly uses .set if it is available.
516 void EmitLabelPlusOffset(const MCSymbol *Label, uint64_t Offset,
517 unsigned Size, bool IsSectionRelative = false) const;
519 /// Emit something like ".long Label" where the size in bytes of the directive
520 /// is specified by Size and Label specifies the label.
521 void EmitLabelReference(const MCSymbol *Label, unsigned Size,
522 bool IsSectionRelative = false) const {
523 EmitLabelPlusOffset(Label, 0, Size, IsSectionRelative);
526 /// Emit something like ".long Label + Offset".
527 void EmitDwarfOffset(const MCSymbol *Label, uint64_t Offset) const;
529 //===------------------------------------------------------------------===//
530 // Dwarf Emission Helper Routines
531 //===------------------------------------------------------------------===//
533 /// Emit the specified signed leb128 value.
534 void EmitSLEB128(int64_t Value, const char *Desc = nullptr) const;
536 /// Emit the specified unsigned leb128 value.
537 void EmitULEB128(uint64_t Value, const char *Desc = nullptr, unsigned PadTo = 0) const;
539 /// Emit a .byte 42 directive that corresponds to an encoding. If verbose
540 /// assembly output is enabled, we output comments describing the encoding.
541 /// Desc is a string saying what the encoding is specifying (e.g. "LSDA").
542 void EmitEncodingByte(unsigned Val, const char *Desc = nullptr) const;
544 /// Return the size of the encoding in bytes.
545 unsigned GetSizeOfEncodedValue(unsigned Encoding) const;
547 /// Emit reference to a ttype global with a specified encoding.
548 void EmitTTypeReference(const GlobalValue *GV, unsigned Encoding) const;
550 /// Emit a reference to a symbol for use in dwarf. Different object formats
551 /// represent this in different ways. Some use a relocation others encode
552 /// the label offset in its section.
553 void emitDwarfSymbolReference(const MCSymbol *Label,
554 bool ForceOffset = false) const;
556 /// Emit the 4-byte offset of a string from the start of its section.
558 /// When possible, emit a DwarfStringPool section offset without any
559 /// relocations, and without using the symbol. Otherwise, defers to \a
560 /// emitDwarfSymbolReference().
561 void emitDwarfStringOffset(DwarfStringPoolEntry S) const;
563 /// Emit the 4-byte offset of a string from the start of its section.
564 void emitDwarfStringOffset(DwarfStringPoolEntryRef S) const {
565 emitDwarfStringOffset(S.getEntry());
568 /// Emit reference to a call site with a specified encoding
569 void EmitCallSiteOffset(const MCSymbol *Hi, const MCSymbol *Lo,
570 unsigned Encoding) const;
571 /// Emit an integer value corresponding to the call site encoding
572 void EmitCallSiteValue(uint64_t Value, unsigned Encoding) const;
574 /// Get the value for DW_AT_APPLE_isa. Zero if no isa encoding specified.
575 virtual unsigned getISAEncoding() { return 0; }
577 /// Emit the directive and value for debug thread local expression
579 /// \p Value - The value to emit.
580 /// \p Size - The size of the integer (in bytes) to emit.
581 virtual void EmitDebugValue(const MCExpr *Value, unsigned Size) const;
583 //===------------------------------------------------------------------===//
584 // Dwarf Lowering Routines
585 //===------------------------------------------------------------------===//
587 /// Emit frame instruction to describe the layout of the frame.
588 void emitCFIInstruction(const MCCFIInstruction &Inst) const;
590 /// Emit Dwarf abbreviation table.
591 template <typename T> void emitDwarfAbbrevs(const T &Abbrevs) const {
592 // For each abbreviation.
593 for (const auto &Abbrev : Abbrevs)
594 emitDwarfAbbrev(*Abbrev);
596 // Mark end of abbreviations.
597 EmitULEB128(0, "EOM(3)");
600 void emitDwarfAbbrev(const DIEAbbrev &Abbrev) const;
602 /// Recursively emit Dwarf DIE tree.
603 void emitDwarfDIE(const DIE &Die) const;
605 //===------------------------------------------------------------------===//
606 // Inline Asm Support
607 //===------------------------------------------------------------------===//
609 // These are hooks that targets can override to implement inline asm
610 // support. These should probably be moved out of AsmPrinter someday.
612 /// Print information related to the specified machine instr that is
613 /// independent of the operand, and may be independent of the instr itself.
614 /// This can be useful for portably encoding the comment character or other
615 /// bits of target-specific knowledge into the asmstrings. The syntax used is
616 /// ${:comment}. Targets can override this to add support for their own
618 virtual void PrintSpecial(const MachineInstr *MI, raw_ostream &OS,
619 const char *Code) const;
621 /// Print the MachineOperand as a symbol. Targets with complex handling of
622 /// symbol references should override the base implementation.
623 virtual void PrintSymbolOperand(const MachineOperand &MO, raw_ostream &OS);
625 /// Print the specified operand of MI, an INLINEASM instruction, using the
626 /// specified assembler variant. Targets should override this to format as
627 /// appropriate. This method can return true if the operand is erroneous.
628 virtual bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
629 const char *ExtraCode, raw_ostream &OS);
631 /// Print the specified operand of MI, an INLINEASM instruction, using the
632 /// specified assembler variant as an address. Targets should override this to
633 /// format as appropriate. This method can return true if the operand is
635 virtual bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
636 const char *ExtraCode, raw_ostream &OS);
638 /// Let the target do anything it needs to do before emitting inlineasm.
639 /// \p StartInfo - the subtarget info before parsing inline asm
640 virtual void emitInlineAsmStart() const;
642 /// Let the target do anything it needs to do after emitting inlineasm.
643 /// This callback can be used restore the original mode in case the
644 /// inlineasm contains directives to switch modes.
645 /// \p StartInfo - the original subtarget info before inline asm
646 /// \p EndInfo - the final subtarget info after parsing the inline asm,
647 /// or NULL if the value is unknown.
648 virtual void emitInlineAsmEnd(const MCSubtargetInfo &StartInfo,
649 const MCSubtargetInfo *EndInfo) const;
651 /// This emits visibility information about symbol, if this is supported by
653 void EmitVisibility(MCSymbol *Sym, unsigned Visibility,
654 bool IsDefinition = true) const;
656 /// This emits linkage information about \p GVSym based on \p GV, if this is
657 /// supported by the target.
658 void EmitLinkage(const GlobalValue *GV, MCSymbol *GVSym) const;
660 /// Return the alignment for the specified \p GV.
661 static Align getGVAlignment(const GlobalValue *GV, const DataLayout &DL,
662 Align InAlign = Align::None());
665 /// Private state for PrintSpecial()
666 // Assign a unique ID to this machine instruction.
667 mutable const MachineInstr *LastMI = nullptr;
668 mutable unsigned LastFn = 0;
669 mutable unsigned Counter = ~0U;
671 /// This method emits the header for the current function.
672 virtual void EmitFunctionHeader();
674 /// Emit a blob of inline asm to the output streamer.
676 EmitInlineAsm(StringRef Str, const MCSubtargetInfo &STI,
677 const MCTargetOptions &MCOptions,
678 const MDNode *LocMDNode = nullptr,
679 InlineAsm::AsmDialect AsmDialect = InlineAsm::AD_ATT) const;
681 /// This method formats and emits the specified machine instruction that is an
683 void EmitInlineAsm(const MachineInstr *MI) const;
685 /// Add inline assembly info to the diagnostics machinery, so we can
686 /// emit file and position info. Returns SrcMgr memory buffer position.
687 unsigned addInlineAsmDiagBuffer(StringRef AsmStr,
688 const MDNode *LocMDNode) const;
690 //===------------------------------------------------------------------===//
691 // Internal Implementation Details
692 //===------------------------------------------------------------------===//
694 void EmitJumpTableEntry(const MachineJumpTableInfo *MJTI,
695 const MachineBasicBlock *MBB, unsigned uid) const;
696 void EmitLLVMUsedList(const ConstantArray *InitList);
697 /// Emit llvm.ident metadata in an '.ident' directive.
698 void EmitModuleIdents(Module &M);
699 /// Emit bytes for llvm.commandline metadata.
700 void EmitModuleCommandLines(Module &M);
701 void EmitXXStructorList(const DataLayout &DL, const Constant *List,
704 GCMetadataPrinter *GetOrCreateGCPrinter(GCStrategy &S);
705 /// Emit GlobalAlias or GlobalIFunc.
706 void emitGlobalIndirectSymbol(Module &M, const GlobalIndirectSymbol &GIS);
709 } // end namespace llvm
711 #endif // LLVM_CODEGEN_ASMPRINTER_H