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 *CurrentFnEnd = nullptr;
139 MCSymbol *CurExceptionSym = nullptr;
141 // The garbage collection metadata printer table.
142 void *GCMetadataPrinters = nullptr; // Really a DenseMap.
144 /// Emit comments in assembly output if this is true.
150 MCSymbol *CurrentFnBegin = nullptr;
152 /// Protected struct HandlerInfo and Handlers permit target extended
153 /// AsmPrinter adds their own handlers.
155 std::unique_ptr<AsmPrinterHandler> Handler;
156 const char *TimerName;
157 const char *TimerDescription;
158 const char *TimerGroupName;
159 const char *TimerGroupDescription;
161 HandlerInfo(std::unique_ptr<AsmPrinterHandler> Handler,
162 const char *TimerName, const char *TimerDescription,
163 const char *TimerGroupName, const char *TimerGroupDescription)
164 : Handler(std::move(Handler)), TimerName(TimerName),
165 TimerDescription(TimerDescription), TimerGroupName(TimerGroupName),
166 TimerGroupDescription(TimerGroupDescription) {}
169 /// A vector of all debug/EH info emitters we should use. This vector
170 /// maintains ownership of the emitters.
171 SmallVector<HandlerInfo, 1> Handlers;
174 struct SrcMgrDiagInfo {
176 std::vector<const MDNode *> LocInfos;
177 LLVMContext::InlineAsmDiagHandlerTy DiagHandler;
182 /// If generated on the fly this own the instance.
183 std::unique_ptr<MachineDominatorTree> OwnedMDT;
185 /// If generated on the fly this own the instance.
186 std::unique_ptr<MachineLoopInfo> OwnedMLI;
188 /// Structure for generating diagnostics for inline assembly. Only initialised
190 mutable std::unique_ptr<SrcMgrDiagInfo> DiagInfo;
192 /// If the target supports dwarf debug info, this pointer is non-null.
193 DwarfDebug *DD = nullptr;
195 /// If the current module uses dwarf CFI annotations strictly for debugging.
196 bool isCFIMoveForDebugging = false;
199 explicit AsmPrinter(TargetMachine &TM, std::unique_ptr<MCStreamer> Streamer);
202 ~AsmPrinter() override;
204 DwarfDebug *getDwarfDebug() { return DD; }
205 DwarfDebug *getDwarfDebug() const { return DD; }
207 uint16_t getDwarfVersion() const;
208 void setDwarfVersion(uint16_t Version);
210 bool isPositionIndependent() const;
212 /// Return true if assembly output should contain comments.
213 bool isVerbose() const { return VerboseAsm; }
215 /// Return a unique ID for the current function.
216 unsigned getFunctionNumber() const;
218 /// Return symbol for the function pseudo stack if the stack frame is not a
220 virtual const MCSymbol *getFunctionFrameSymbol() const { return nullptr; }
222 MCSymbol *getFunctionBegin() const { return CurrentFnBegin; }
223 MCSymbol *getFunctionEnd() const { return CurrentFnEnd; }
224 MCSymbol *getCurExceptionSym();
226 /// Return information about object file lowering.
227 const TargetLoweringObjectFile &getObjFileLowering() const;
229 /// Return information about data layout.
230 const DataLayout &getDataLayout() const;
232 /// Return the pointer size from the TargetMachine
233 unsigned getPointerSize() const;
235 /// Return information about subtarget.
236 const MCSubtargetInfo &getSubtargetInfo() const;
238 void EmitToStreamer(MCStreamer &S, const MCInst &Inst);
240 /// Emits inital debug location directive.
241 void emitInitialRawDwarfLocDirective(const MachineFunction &MF);
243 /// Return the current section we are emitting to.
244 const MCSection *getCurrentSection() const;
246 void getNameWithPrefix(SmallVectorImpl<char> &Name,
247 const GlobalValue *GV) const;
249 MCSymbol *getSymbol(const GlobalValue *GV) const;
251 //===------------------------------------------------------------------===//
252 // XRay instrumentation implementation.
253 //===------------------------------------------------------------------===//
255 // This describes the kind of sled we're storing in the XRay table.
256 enum class SledKind : uint8_t {
265 // The table will contain these structs that point to the sled, the function
266 // containing the sled, and what kind of sled (and whether they should always
267 // be instrumented). We also use a version identifier that the runtime can use
268 // to decide what to do with the sled, depending on the version of the sled.
269 struct XRayFunctionEntry {
270 const MCSymbol *Sled;
271 const MCSymbol *Function;
273 bool AlwaysInstrument;
274 const class Function *Fn;
277 void emit(int, MCStreamer *, const MCSymbol *) const;
280 // All the sleds to be emitted.
281 SmallVector<XRayFunctionEntry, 4> Sleds;
283 // A unique ID used for ELF sections associated with a particular function.
284 unsigned XRayFnUniqueID = 0;
286 // Helper function to record a given XRay sled.
287 void recordSled(MCSymbol *Sled, const MachineInstr &MI, SledKind Kind,
288 uint8_t Version = 0);
290 /// Emit a table with all XRay instrumentation points.
291 void emitXRayTable();
293 DenseMap<const MCSection *, unsigned> PatchableFunctionEntryID;
294 void emitPatchableFunctionEntries();
296 //===------------------------------------------------------------------===//
297 // MachineFunctionPass Implementation.
298 //===------------------------------------------------------------------===//
300 /// Record analysis usage.
301 void getAnalysisUsage(AnalysisUsage &AU) const override;
303 /// Set up the AsmPrinter when we are working on a new module. If your pass
304 /// overrides this, it must make sure to explicitly call this implementation.
305 bool doInitialization(Module &M) override;
307 /// Shut down the asmprinter. If you override this in your pass, you must make
308 /// sure to call it explicitly.
309 bool doFinalization(Module &M) override;
311 /// Emit the specified function out to the OutStreamer.
312 bool runOnMachineFunction(MachineFunction &MF) override {
313 SetupMachineFunction(MF);
318 //===------------------------------------------------------------------===//
319 // Coarse grained IR lowering routines.
320 //===------------------------------------------------------------------===//
322 /// This should be called when a new MachineFunction is being processed from
323 /// runOnMachineFunction.
324 virtual void SetupMachineFunction(MachineFunction &MF);
326 /// This method emits the body and trailer for a function.
327 void EmitFunctionBody();
329 void emitCFIInstruction(const MachineInstr &MI);
331 void emitFrameAlloc(const MachineInstr &MI);
333 void emitStackSizeSection(const MachineFunction &MF);
335 void emitRemarksSection(RemarkStreamer &RS);
337 enum CFIMoveType { CFI_M_None, CFI_M_EH, CFI_M_Debug };
338 CFIMoveType needsCFIMoves() const;
340 /// Returns false if needsCFIMoves() == CFI_M_EH for any function
342 bool needsOnlyDebugCFIMoves() const { return isCFIMoveForDebugging; }
344 bool needsSEHMoves();
346 /// Print to the current output stream assembly representations of the
347 /// constants in the constant pool MCP. This is used to print out constants
348 /// which have been "spilled to memory" by the code generator.
349 virtual void EmitConstantPool();
351 /// Print assembly representations of the jump tables used by the current
352 /// function to the current output stream.
353 virtual void EmitJumpTableInfo();
355 /// Emit the specified global variable to the .s file.
356 virtual void EmitGlobalVariable(const GlobalVariable *GV);
358 /// Check to see if the specified global is a special global used by LLVM. If
359 /// so, emit it and return true, otherwise do nothing and return false.
360 bool EmitSpecialLLVMGlobal(const GlobalVariable *GV);
362 /// Emit an alignment directive to the specified power of two boundary. If a
363 /// global value is specified, and if that global has an explicit alignment
364 /// requested, it will override the alignment request if required for
366 void EmitAlignment(Align Alignment, const GlobalObject *GV = nullptr) const;
368 /// Lower the specified LLVM Constant to an MCExpr.
369 virtual const MCExpr *lowerConstant(const Constant *CV);
371 /// Print a general LLVM constant to the .s file.
372 void EmitGlobalConstant(const DataLayout &DL, const Constant *CV);
374 /// Unnamed constant global variables solely contaning a pointer to
375 /// another globals variable act like a global variable "proxy", or GOT
376 /// equivalents, i.e., it's only used to hold the address of the latter. One
377 /// optimization is to replace accesses to these proxies by using the GOT
378 /// entry for the final global instead. Hence, we select GOT equivalent
379 /// candidates among all the module global variables, avoid emitting them
380 /// unnecessarily and finally replace references to them by pc relative
381 /// accesses to GOT entries.
382 void computeGlobalGOTEquivs(Module &M);
384 /// Constant expressions using GOT equivalent globals may not be
385 /// eligible for PC relative GOT entry conversion, in such cases we need to
386 /// emit the proxies we previously omitted in EmitGlobalVariable.
387 void emitGlobalGOTEquivs();
389 /// Emit the stack maps.
390 void emitStackMaps(StackMaps &SM);
392 //===------------------------------------------------------------------===//
394 //===------------------------------------------------------------------===//
396 // Targets can, or in the case of EmitInstruction, must implement these to
399 /// This virtual method can be overridden by targets that want to emit
400 /// something at the start of their file.
401 virtual void EmitStartOfAsmFile(Module &) {}
403 /// This virtual method can be overridden by targets that want to emit
404 /// something at the end of their file.
405 virtual void EmitEndOfAsmFile(Module &) {}
407 /// Targets can override this to emit stuff before the first basic block in
409 virtual void EmitFunctionBodyStart() {}
411 /// Targets can override this to emit stuff after the last basic block in the
413 virtual void EmitFunctionBodyEnd() {}
415 /// Targets can override this to emit stuff at the start of a basic block.
416 /// By default, this method prints the label for the specified
417 /// MachineBasicBlock, an alignment (if present) and a comment describing it
419 virtual void EmitBasicBlockStart(const MachineBasicBlock &MBB);
421 /// Targets can override this to emit stuff at the end of a basic block.
422 virtual void EmitBasicBlockEnd(const MachineBasicBlock &MBB);
424 /// Targets should implement this to emit instructions.
425 virtual void EmitInstruction(const MachineInstr *) {
426 llvm_unreachable("EmitInstruction not implemented");
429 /// Return the symbol for the specified constant pool entry.
430 virtual MCSymbol *GetCPISymbol(unsigned CPID) const;
432 virtual void EmitFunctionEntryLabel();
434 virtual void EmitFunctionDescriptor() {
435 llvm_unreachable("Function descriptor is target-specific.");
438 virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV);
440 /// Targets can override this to change how global constants that are part of
441 /// a C++ static/global constructor list are emitted.
442 virtual void EmitXXStructor(const DataLayout &DL, const Constant *CV) {
443 EmitGlobalConstant(DL, CV);
446 /// Return true if the basic block has exactly one predecessor and the control
447 /// transfer mechanism between the predecessor and this block is a
450 isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB) const;
452 /// Targets can override this to customize the output of IMPLICIT_DEF
453 /// instructions in verbose mode.
454 virtual void emitImplicitDef(const MachineInstr *MI) const;
456 /// Emit N NOP instructions.
457 void emitNops(unsigned N);
459 //===------------------------------------------------------------------===//
460 // Symbol Lowering Routines.
461 //===------------------------------------------------------------------===//
463 MCSymbol *createTempSymbol(const Twine &Name) const;
465 /// Return the MCSymbol for a private symbol with global value name as its
466 /// base, with the specified suffix.
467 MCSymbol *getSymbolWithGlobalValueBase(const GlobalValue *GV,
468 StringRef Suffix) const;
470 /// Return the MCSymbol for the specified ExternalSymbol.
471 MCSymbol *GetExternalSymbolSymbol(StringRef Sym) const;
473 /// Return the symbol for the specified jump table entry.
474 MCSymbol *GetJTISymbol(unsigned JTID, bool isLinkerPrivate = false) const;
476 /// Return the symbol for the specified jump table .set
477 /// FIXME: privatize to AsmPrinter.
478 MCSymbol *GetJTSetSymbol(unsigned UID, unsigned MBBID) const;
480 /// Return the MCSymbol used to satisfy BlockAddress uses of the specified
482 MCSymbol *GetBlockAddressSymbol(const BlockAddress *BA) const;
483 MCSymbol *GetBlockAddressSymbol(const BasicBlock *BB) const;
485 //===------------------------------------------------------------------===//
486 // Emission Helper Routines.
487 //===------------------------------------------------------------------===//
489 /// This is just convenient handler for printing offsets.
490 void printOffset(int64_t Offset, raw_ostream &OS) const;
492 /// Emit a byte directive and value.
493 void emitInt8(int Value) const;
495 /// Emit a short directive and value.
496 void emitInt16(int Value) const;
498 /// Emit a long directive and value.
499 void emitInt32(int Value) const;
501 /// Emit a long long directive and value.
502 void emitInt64(uint64_t Value) const;
504 /// Emit something like ".long Hi-Lo" where the size in bytes of the directive
505 /// is specified by Size and Hi/Lo specify the labels. This implicitly uses
506 /// .set if it is available.
507 void EmitLabelDifference(const MCSymbol *Hi, const MCSymbol *Lo,
508 unsigned Size) const;
510 /// Emit something like ".uleb128 Hi-Lo".
511 void EmitLabelDifferenceAsULEB128(const MCSymbol *Hi,
512 const MCSymbol *Lo) const;
514 /// Emit something like ".long Label+Offset" where the size in bytes of the
515 /// directive is specified by Size and Label specifies the label. This
516 /// implicitly uses .set if it is available.
517 void EmitLabelPlusOffset(const MCSymbol *Label, uint64_t Offset,
518 unsigned Size, bool IsSectionRelative = false) const;
520 /// Emit something like ".long Label" where the size in bytes of the directive
521 /// is specified by Size and Label specifies the label.
522 void EmitLabelReference(const MCSymbol *Label, unsigned Size,
523 bool IsSectionRelative = false) const {
524 EmitLabelPlusOffset(Label, 0, Size, IsSectionRelative);
527 /// Emit something like ".long Label + Offset".
528 void EmitDwarfOffset(const MCSymbol *Label, uint64_t Offset) const;
530 //===------------------------------------------------------------------===//
531 // Dwarf Emission Helper Routines
532 //===------------------------------------------------------------------===//
534 /// Emit the specified signed leb128 value.
535 void EmitSLEB128(int64_t Value, const char *Desc = nullptr) const;
537 /// Emit the specified unsigned leb128 value.
538 void EmitULEB128(uint64_t Value, const char *Desc = nullptr, unsigned PadTo = 0) const;
540 /// Emit a .byte 42 directive that corresponds to an encoding. If verbose
541 /// assembly output is enabled, we output comments describing the encoding.
542 /// Desc is a string saying what the encoding is specifying (e.g. "LSDA").
543 void EmitEncodingByte(unsigned Val, const char *Desc = nullptr) const;
545 /// Return the size of the encoding in bytes.
546 unsigned GetSizeOfEncodedValue(unsigned Encoding) const;
548 /// Emit reference to a ttype global with a specified encoding.
549 void EmitTTypeReference(const GlobalValue *GV, unsigned Encoding) const;
551 /// Emit a reference to a symbol for use in dwarf. Different object formats
552 /// represent this in different ways. Some use a relocation others encode
553 /// the label offset in its section.
554 void emitDwarfSymbolReference(const MCSymbol *Label,
555 bool ForceOffset = false) const;
557 /// Emit the 4-byte offset of a string from the start of its section.
559 /// When possible, emit a DwarfStringPool section offset without any
560 /// relocations, and without using the symbol. Otherwise, defers to \a
561 /// emitDwarfSymbolReference().
562 void emitDwarfStringOffset(DwarfStringPoolEntry S) const;
564 /// Emit the 4-byte offset of a string from the start of its section.
565 void emitDwarfStringOffset(DwarfStringPoolEntryRef S) const {
566 emitDwarfStringOffset(S.getEntry());
569 /// Emit reference to a call site with a specified encoding
570 void EmitCallSiteOffset(const MCSymbol *Hi, const MCSymbol *Lo,
571 unsigned Encoding) const;
572 /// Emit an integer value corresponding to the call site encoding
573 void EmitCallSiteValue(uint64_t Value, unsigned Encoding) const;
575 /// Get the value for DW_AT_APPLE_isa. Zero if no isa encoding specified.
576 virtual unsigned getISAEncoding() { return 0; }
578 /// Emit the directive and value for debug thread local expression
580 /// \p Value - The value to emit.
581 /// \p Size - The size of the integer (in bytes) to emit.
582 virtual void EmitDebugValue(const MCExpr *Value, unsigned Size) const;
584 //===------------------------------------------------------------------===//
585 // Dwarf Lowering Routines
586 //===------------------------------------------------------------------===//
588 /// Emit frame instruction to describe the layout of the frame.
589 void emitCFIInstruction(const MCCFIInstruction &Inst) const;
591 /// Emit Dwarf abbreviation table.
592 template <typename T> void emitDwarfAbbrevs(const T &Abbrevs) const {
593 // For each abbreviation.
594 for (const auto &Abbrev : Abbrevs)
595 emitDwarfAbbrev(*Abbrev);
597 // Mark end of abbreviations.
598 EmitULEB128(0, "EOM(3)");
601 void emitDwarfAbbrev(const DIEAbbrev &Abbrev) const;
603 /// Recursively emit Dwarf DIE tree.
604 void emitDwarfDIE(const DIE &Die) const;
606 //===------------------------------------------------------------------===//
607 // Inline Asm Support
608 //===------------------------------------------------------------------===//
610 // These are hooks that targets can override to implement inline asm
611 // support. These should probably be moved out of AsmPrinter someday.
613 /// Print information related to the specified machine instr that is
614 /// independent of the operand, and may be independent of the instr itself.
615 /// This can be useful for portably encoding the comment character or other
616 /// bits of target-specific knowledge into the asmstrings. The syntax used is
617 /// ${:comment}. Targets can override this to add support for their own
619 virtual void PrintSpecial(const MachineInstr *MI, raw_ostream &OS,
620 const char *Code) const;
622 /// Print the MachineOperand as a symbol. Targets with complex handling of
623 /// symbol references should override the base implementation.
624 virtual void PrintSymbolOperand(const MachineOperand &MO, raw_ostream &OS);
626 /// Print the specified operand of MI, an INLINEASM instruction, using the
627 /// specified assembler variant. Targets should override this to format as
628 /// appropriate. This method can return true if the operand is erroneous.
629 virtual bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
630 const char *ExtraCode, raw_ostream &OS);
632 /// Print the specified operand of MI, an INLINEASM instruction, using the
633 /// specified assembler variant as an address. Targets should override this to
634 /// format as appropriate. This method can return true if the operand is
636 virtual bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
637 const char *ExtraCode, raw_ostream &OS);
639 /// Let the target do anything it needs to do before emitting inlineasm.
640 /// \p StartInfo - the subtarget info before parsing inline asm
641 virtual void emitInlineAsmStart() const;
643 /// Let the target do anything it needs to do after emitting inlineasm.
644 /// This callback can be used restore the original mode in case the
645 /// inlineasm contains directives to switch modes.
646 /// \p StartInfo - the original subtarget info before inline asm
647 /// \p EndInfo - the final subtarget info after parsing the inline asm,
648 /// or NULL if the value is unknown.
649 virtual void emitInlineAsmEnd(const MCSubtargetInfo &StartInfo,
650 const MCSubtargetInfo *EndInfo) const;
652 /// This emits visibility information about symbol, if this is supported by
654 void EmitVisibility(MCSymbol *Sym, unsigned Visibility,
655 bool IsDefinition = true) const;
657 /// This emits linkage information about \p GVSym based on \p GV, if this is
658 /// supported by the target.
659 void EmitLinkage(const GlobalValue *GV, MCSymbol *GVSym) const;
661 /// Return the alignment for the specified \p GV.
662 static Align getGVAlignment(const GlobalValue *GV, const DataLayout &DL,
663 Align InAlign = Align::None());
666 /// Private state for PrintSpecial()
667 // Assign a unique ID to this machine instruction.
668 mutable const MachineInstr *LastMI = nullptr;
669 mutable unsigned LastFn = 0;
670 mutable unsigned Counter = ~0U;
672 /// This method emits the header for the current function.
673 virtual void EmitFunctionHeader();
675 /// Emit a blob of inline asm to the output streamer.
677 EmitInlineAsm(StringRef Str, const MCSubtargetInfo &STI,
678 const MCTargetOptions &MCOptions,
679 const MDNode *LocMDNode = nullptr,
680 InlineAsm::AsmDialect AsmDialect = InlineAsm::AD_ATT) const;
682 /// This method formats and emits the specified machine instruction that is an
684 void EmitInlineAsm(const MachineInstr *MI) const;
686 /// Add inline assembly info to the diagnostics machinery, so we can
687 /// emit file and position info. Returns SrcMgr memory buffer position.
688 unsigned addInlineAsmDiagBuffer(StringRef AsmStr,
689 const MDNode *LocMDNode) const;
691 //===------------------------------------------------------------------===//
692 // Internal Implementation Details
693 //===------------------------------------------------------------------===//
695 void EmitJumpTableEntry(const MachineJumpTableInfo *MJTI,
696 const MachineBasicBlock *MBB, unsigned uid) const;
697 void EmitLLVMUsedList(const ConstantArray *InitList);
698 /// Emit llvm.ident metadata in an '.ident' directive.
699 void EmitModuleIdents(Module &M);
700 /// Emit bytes for llvm.commandline metadata.
701 void EmitModuleCommandLines(Module &M);
702 void EmitXXStructorList(const DataLayout &DL, const Constant *List,
705 GCMetadataPrinter *GetOrCreateGCPrinter(GCStrategy &S);
706 /// Emit GlobalAlias or GlobalIFunc.
707 void emitGlobalIndirectSymbol(Module &M, const GlobalIndirectSymbol &GIS);
710 } // end namespace llvm
712 #endif // LLVM_CODEGEN_ASMPRINTER_H