1 //===- lib/MC/MCAsmStreamer.cpp - Text Assembly Output ----------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/ADT/STLExtras.h"
11 #include "llvm/ADT/SmallString.h"
12 #include "llvm/ADT/StringExtras.h"
13 #include "llvm/ADT/Twine.h"
14 #include "llvm/MC/MCAsmBackend.h"
15 #include "llvm/MC/MCAsmInfo.h"
16 #include "llvm/MC/MCCodeEmitter.h"
17 #include "llvm/MC/MCContext.h"
18 #include "llvm/MC/MCExpr.h"
19 #include "llvm/MC/MCFixupKindInfo.h"
20 #include "llvm/MC/MCInst.h"
21 #include "llvm/MC/MCInstPrinter.h"
22 #include "llvm/MC/MCObjectFileInfo.h"
23 #include "llvm/MC/MCRegisterInfo.h"
24 #include "llvm/MC/MCSectionCOFF.h"
25 #include "llvm/MC/MCSectionMachO.h"
26 #include "llvm/MC/MCStreamer.h"
27 #include "llvm/MC/MCSymbolELF.h"
28 #include "llvm/Support/ErrorHandling.h"
29 #include "llvm/Support/Format.h"
30 #include "llvm/Support/FormattedStream.h"
31 #include "llvm/Support/LEB128.h"
32 #include "llvm/Support/MathExtras.h"
33 #include "llvm/Support/Path.h"
34 #include "llvm/Support/SourceMgr.h"
41 class MCAsmStreamer final : public MCStreamer {
42 std::unique_ptr<formatted_raw_ostream> OSOwner;
43 formatted_raw_ostream &OS;
45 std::unique_ptr<MCInstPrinter> InstPrinter;
46 std::unique_ptr<MCCodeEmitter> Emitter;
47 std::unique_ptr<MCAsmBackend> AsmBackend;
49 SmallString<128> ExplicitCommentToEmit;
50 SmallString<128> CommentToEmit;
51 raw_svector_ostream CommentStream;
53 unsigned IsVerboseAsm : 1;
54 unsigned ShowInst : 1;
55 unsigned UseDwarfDirectory : 1;
57 void EmitRegisterName(int64_t Register);
58 void EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) override;
59 void EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) override;
62 MCAsmStreamer(MCContext &Context, std::unique_ptr<formatted_raw_ostream> os,
63 bool isVerboseAsm, bool useDwarfDirectory,
64 MCInstPrinter *printer, MCCodeEmitter *emitter,
65 MCAsmBackend *asmbackend, bool showInst)
66 : MCStreamer(Context), OSOwner(std::move(os)), OS(*OSOwner),
67 MAI(Context.getAsmInfo()), InstPrinter(printer), Emitter(emitter),
68 AsmBackend(asmbackend), CommentStream(CommentToEmit),
69 IsVerboseAsm(isVerboseAsm), ShowInst(showInst),
70 UseDwarfDirectory(useDwarfDirectory) {
73 InstPrinter->setCommentStream(CommentStream);
76 inline void EmitEOL() {
77 // Dump Explicit Comments here.
78 emitExplicitComments();
79 // If we don't have any comments, just emit a \n.
87 void EmitSyntaxDirective() override;
89 void EmitCommentsAndEOL();
91 /// isVerboseAsm - Return true if this streamer supports verbose assembly at
93 bool isVerboseAsm() const override { return IsVerboseAsm; }
95 /// hasRawTextSupport - We support EmitRawText.
96 bool hasRawTextSupport() const override { return true; }
98 /// AddComment - Add a comment that can be emitted to the generated .s
99 /// file if applicable as a QoI issue to make the output of the compiler
100 /// more readable. This only affects the MCAsmStreamer, and only when
101 /// verbose assembly output is enabled.
102 void AddComment(const Twine &T) override;
104 /// AddEncodingComment - Add a comment showing the encoding of an instruction.
105 void AddEncodingComment(const MCInst &Inst, const MCSubtargetInfo &);
107 /// GetCommentOS - Return a raw_ostream that comments can be written to.
108 /// Unlike AddComment, you are required to terminate comments with \n if you
110 raw_ostream &GetCommentOS() override {
112 return nulls(); // Discard comments unless in verbose asm mode.
113 return CommentStream;
116 void emitRawComment(const Twine &T, bool TabPrefix = true) override;
118 void addExplicitComment(const Twine &T) override;
119 void emitExplicitComments() override;
121 /// AddBlankLine - Emit a blank line to a .s file to pretty it up.
122 void AddBlankLine() override {
126 /// @name MCStreamer Interface
129 void ChangeSection(MCSection *Section, const MCExpr *Subsection) override;
131 void EmitLOHDirective(MCLOHType Kind, const MCLOHArgs &Args) override;
132 void EmitLabel(MCSymbol *Symbol) override;
134 void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
135 void EmitLinkerOptions(ArrayRef<std::string> Options) override;
136 void EmitDataRegion(MCDataRegionType Kind) override;
137 void EmitVersionMin(MCVersionMinType Kind, unsigned Major, unsigned Minor,
138 unsigned Update) override;
139 void EmitThumbFunc(MCSymbol *Func) override;
141 void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) override;
142 void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override;
143 bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override;
145 void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override;
146 void BeginCOFFSymbolDef(const MCSymbol *Symbol) override;
147 void EmitCOFFSymbolStorageClass(int StorageClass) override;
148 void EmitCOFFSymbolType(int Type) override;
149 void EndCOFFSymbolDef() override;
150 void EmitCOFFSafeSEH(MCSymbol const *Symbol) override;
151 void EmitCOFFSectionIndex(MCSymbol const *Symbol) override;
152 void EmitCOFFSecRel32(MCSymbol const *Symbol) override;
153 void emitELFSize(MCSymbolELF *Symbol, const MCExpr *Value) override;
154 void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
155 unsigned ByteAlignment) override;
157 /// EmitLocalCommonSymbol - Emit a local common (.lcomm) symbol.
159 /// @param Symbol - The common symbol to emit.
160 /// @param Size - The size of the common symbol.
161 /// @param ByteAlignment - The alignment of the common symbol in bytes.
162 void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
163 unsigned ByteAlignment) override;
165 void EmitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr,
166 uint64_t Size = 0, unsigned ByteAlignment = 0) override;
168 void EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol, uint64_t Size,
169 unsigned ByteAlignment = 0) override;
171 void EmitBinaryData(StringRef Data) override;
173 void EmitBytes(StringRef Data) override;
175 void EmitValueImpl(const MCExpr *Value, unsigned Size,
176 SMLoc Loc = SMLoc()) override;
177 void EmitIntValue(uint64_t Value, unsigned Size) override;
179 void EmitULEB128Value(const MCExpr *Value) override;
181 void EmitSLEB128Value(const MCExpr *Value) override;
183 void EmitGPRel64Value(const MCExpr *Value) override;
185 void EmitGPRel32Value(const MCExpr *Value) override;
188 void emitFill(uint64_t NumBytes, uint8_t FillValue) override;
190 void emitFill(const MCExpr &NumBytes, uint64_t FillValue,
191 SMLoc Loc = SMLoc()) override;
193 void emitFill(uint64_t NumValues, int64_t Size, int64_t Expr) override;
195 void emitFill(const MCExpr &NumValues, int64_t Size, int64_t Expr,
196 SMLoc Loc = SMLoc()) override;
198 void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
199 unsigned ValueSize = 1,
200 unsigned MaxBytesToEmit = 0) override;
202 void EmitCodeAlignment(unsigned ByteAlignment,
203 unsigned MaxBytesToEmit = 0) override;
205 void emitValueToOffset(const MCExpr *Offset,
206 unsigned char Value = 0) override;
208 void EmitFileDirective(StringRef Filename) override;
209 unsigned EmitDwarfFileDirective(unsigned FileNo, StringRef Directory,
211 unsigned CUID = 0) override;
212 void EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
213 unsigned Column, unsigned Flags,
214 unsigned Isa, unsigned Discriminator,
215 StringRef FileName) override;
216 MCSymbol *getDwarfLineTableSymbol(unsigned CUID) override;
218 unsigned EmitCVFileDirective(unsigned FileNo, StringRef Filename) override;
219 void EmitCVLocDirective(unsigned FunctionId, unsigned FileNo, unsigned Line,
220 unsigned Column, bool PrologueEnd, bool IsStmt,
221 StringRef FileName) override;
222 void EmitCVLinetableDirective(unsigned FunctionId, const MCSymbol *FnStart,
223 const MCSymbol *FnEnd) override;
224 void EmitCVInlineLinetableDirective(
225 unsigned PrimaryFunctionId, unsigned SourceFileId, unsigned SourceLineNum,
226 const MCSymbol *FnStartSym, const MCSymbol *FnEndSym,
227 ArrayRef<unsigned> SecondaryFunctionIds) override;
228 void EmitCVDefRangeDirective(
229 ArrayRef<std::pair<const MCSymbol *, const MCSymbol *>> Ranges,
230 StringRef FixedSizePortion) override;
231 void EmitCVStringTableDirective() override;
232 void EmitCVFileChecksumsDirective() override;
234 void EmitIdent(StringRef IdentString) override;
235 void EmitCFISections(bool EH, bool Debug) override;
236 void EmitCFIDefCfa(int64_t Register, int64_t Offset) override;
237 void EmitCFIDefCfaOffset(int64_t Offset) override;
238 void EmitCFIDefCfaRegister(int64_t Register) override;
239 void EmitCFIOffset(int64_t Register, int64_t Offset) override;
240 void EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding) override;
241 void EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) override;
242 void EmitCFIRememberState() override;
243 void EmitCFIRestoreState() override;
244 void EmitCFISameValue(int64_t Register) override;
245 void EmitCFIRelOffset(int64_t Register, int64_t Offset) override;
246 void EmitCFIAdjustCfaOffset(int64_t Adjustment) override;
247 void EmitCFIEscape(StringRef Values) override;
248 void EmitCFIGnuArgsSize(int64_t Size) override;
249 void EmitCFISignalFrame() override;
250 void EmitCFIUndefined(int64_t Register) override;
251 void EmitCFIRegister(int64_t Register1, int64_t Register2) override;
252 void EmitCFIWindowSave() override;
254 void EmitWinCFIStartProc(const MCSymbol *Symbol) override;
255 void EmitWinCFIEndProc() override;
256 void EmitWinCFIStartChained() override;
257 void EmitWinCFIEndChained() override;
258 void EmitWinCFIPushReg(unsigned Register) override;
259 void EmitWinCFISetFrame(unsigned Register, unsigned Offset) override;
260 void EmitWinCFIAllocStack(unsigned Size) override;
261 void EmitWinCFISaveReg(unsigned Register, unsigned Offset) override;
262 void EmitWinCFISaveXMM(unsigned Register, unsigned Offset) override;
263 void EmitWinCFIPushFrame(bool Code) override;
264 void EmitWinCFIEndProlog() override;
266 void EmitWinEHHandler(const MCSymbol *Sym, bool Unwind, bool Except) override;
267 void EmitWinEHHandlerData() override;
269 void EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) override;
271 void EmitBundleAlignMode(unsigned AlignPow2) override;
272 void EmitBundleLock(bool AlignToEnd) override;
273 void EmitBundleUnlock() override;
275 bool EmitRelocDirective(const MCExpr &Offset, StringRef Name,
276 const MCExpr *Expr, SMLoc Loc) override;
278 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
279 /// the specified string in the output .s file. This capability is
280 /// indicated by the hasRawTextSupport() predicate.
281 void EmitRawTextImpl(StringRef String) override;
283 void FinishImpl() override;
286 } // end anonymous namespace.
288 /// AddComment - Add a comment that can be emitted to the generated .s
289 /// file if applicable as a QoI issue to make the output of the compiler
290 /// more readable. This only affects the MCAsmStreamer, and only when
291 /// verbose assembly output is enabled.
292 void MCAsmStreamer::AddComment(const Twine &T) {
293 if (!IsVerboseAsm) return;
295 T.toVector(CommentToEmit);
296 // Each comment goes on its own line.
297 CommentToEmit.push_back('\n');
300 void MCAsmStreamer::EmitCommentsAndEOL() {
301 if (CommentToEmit.empty() && CommentStream.GetNumBytesInBuffer() == 0) {
306 StringRef Comments = CommentToEmit;
308 assert(Comments.back() == '\n' &&
309 "Comment array not newline terminated");
311 // Emit a line of comments.
312 OS.PadToColumn(MAI->getCommentColumn());
313 size_t Position = Comments.find('\n');
314 OS << MAI->getCommentString() << ' ' << Comments.substr(0, Position) <<'\n';
316 Comments = Comments.substr(Position+1);
317 } while (!Comments.empty());
319 CommentToEmit.clear();
322 static inline int64_t truncateToSize(int64_t Value, unsigned Bytes) {
323 assert(Bytes > 0 && Bytes <= 8 && "Invalid size!");
324 return Value & ((uint64_t) (int64_t) -1 >> (64 - Bytes * 8));
327 void MCAsmStreamer::emitRawComment(const Twine &T, bool TabPrefix) {
330 OS << MAI->getCommentString() << T;
334 void MCAsmStreamer::addExplicitComment(const Twine &T) {
335 StringRef c = T.getSingleStringRef();
336 if (c.equals(StringRef(MAI->getSeparatorString())))
338 if (c.startswith(StringRef("//"))) {
339 ExplicitCommentToEmit.append("\t");
340 ExplicitCommentToEmit.append(MAI->getCommentString());
342 ExplicitCommentToEmit.append(c.slice(2, c.size()).str());
343 } else if (c.startswith(StringRef("/*"))) {
344 size_t p = 2, len = c.size() - 2;
345 // emit each line in comment as separate newline.
347 size_t newp = std::min(len, c.find_first_of("\r\n", p));
348 ExplicitCommentToEmit.append("\t");
349 ExplicitCommentToEmit.append(MAI->getCommentString());
350 ExplicitCommentToEmit.append(c.slice(p, newp).str());
351 // If we have another line in this comment add line
353 ExplicitCommentToEmit.append("\n");
356 } else if (c.startswith(StringRef(MAI->getCommentString()))) {
357 ExplicitCommentToEmit.append("\t");
358 ExplicitCommentToEmit.append(c.str());
359 } else if (c.front() == '#') {
360 // # are comments for ## commentString. Output extra #.
361 ExplicitCommentToEmit.append("\t#");
362 ExplicitCommentToEmit.append(c.str());
364 assert(false && "Unexpected Assembly Comment");
365 // full line comments immediately output
366 if (c.back() == '\n')
367 emitExplicitComments();
370 void MCAsmStreamer::emitExplicitComments() {
371 StringRef Comments = ExplicitCommentToEmit;
372 if (!Comments.empty())
374 ExplicitCommentToEmit.clear();
377 void MCAsmStreamer::ChangeSection(MCSection *Section,
378 const MCExpr *Subsection) {
379 assert(Section && "Cannot switch to a null section!");
380 Section->PrintSwitchToSection(*MAI, OS, Subsection);
383 void MCAsmStreamer::EmitLabel(MCSymbol *Symbol) {
384 assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
385 MCStreamer::EmitLabel(Symbol);
387 Symbol->print(OS, MAI);
388 OS << MAI->getLabelSuffix();
393 void MCAsmStreamer::EmitLOHDirective(MCLOHType Kind, const MCLOHArgs &Args) {
394 StringRef str = MCLOHIdToName(Kind);
397 int NbArgs = MCLOHIdToNbArgs(Kind);
398 assert(NbArgs != -1 && ((size_t)NbArgs) == Args.size() && "Malformed LOH!");
399 assert(str != "" && "Invalid LOH name");
402 OS << "\t" << MCLOHDirectiveName() << " " << str << "\t";
404 for (const MCSymbol *Arg : Args) {
413 void MCAsmStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
415 case MCAF_SyntaxUnified: OS << "\t.syntax unified"; break;
416 case MCAF_SubsectionsViaSymbols: OS << ".subsections_via_symbols"; break;
417 case MCAF_Code16: OS << '\t'<< MAI->getCode16Directive();break;
418 case MCAF_Code32: OS << '\t'<< MAI->getCode32Directive();break;
419 case MCAF_Code64: OS << '\t'<< MAI->getCode64Directive();break;
424 void MCAsmStreamer::EmitLinkerOptions(ArrayRef<std::string> Options) {
425 assert(!Options.empty() && "At least one option is required!");
426 OS << "\t.linker_option \"" << Options[0] << '"';
427 for (ArrayRef<std::string>::iterator it = Options.begin() + 1,
428 ie = Options.end(); it != ie; ++it) {
429 OS << ", " << '"' << *it << '"';
434 void MCAsmStreamer::EmitDataRegion(MCDataRegionType Kind) {
435 if (!MAI->doesSupportDataRegionDirectives())
438 case MCDR_DataRegion: OS << "\t.data_region"; break;
439 case MCDR_DataRegionJT8: OS << "\t.data_region jt8"; break;
440 case MCDR_DataRegionJT16: OS << "\t.data_region jt16"; break;
441 case MCDR_DataRegionJT32: OS << "\t.data_region jt32"; break;
442 case MCDR_DataRegionEnd: OS << "\t.end_data_region"; break;
447 void MCAsmStreamer::EmitVersionMin(MCVersionMinType Kind, unsigned Major,
448 unsigned Minor, unsigned Update) {
450 case MCVM_WatchOSVersionMin: OS << "\t.watchos_version_min"; break;
451 case MCVM_TvOSVersionMin: OS << "\t.tvos_version_min"; break;
452 case MCVM_IOSVersionMin: OS << "\t.ios_version_min"; break;
453 case MCVM_OSXVersionMin: OS << "\t.macosx_version_min"; break;
455 OS << " " << Major << ", " << Minor;
457 OS << ", " << Update;
461 void MCAsmStreamer::EmitThumbFunc(MCSymbol *Func) {
462 // This needs to emit to a temporary string to get properly quoted
463 // MCSymbols when they have spaces in them.
464 OS << "\t.thumb_func";
465 // Only Mach-O hasSubsectionsViaSymbols()
466 if (MAI->hasSubsectionsViaSymbols()) {
468 Func->print(OS, MAI);
473 void MCAsmStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
474 Symbol->print(OS, MAI);
476 Value->print(OS, MAI);
480 MCStreamer::EmitAssignment(Symbol, Value);
483 void MCAsmStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {
485 Alias->print(OS, MAI);
487 Symbol->print(OS, MAI);
491 bool MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
492 MCSymbolAttr Attribute) {
494 case MCSA_Invalid: llvm_unreachable("Invalid symbol attribute");
495 case MCSA_ELF_TypeFunction: /// .type _foo, STT_FUNC # aka @function
496 case MCSA_ELF_TypeIndFunction: /// .type _foo, STT_GNU_IFUNC
497 case MCSA_ELF_TypeObject: /// .type _foo, STT_OBJECT # aka @object
498 case MCSA_ELF_TypeTLS: /// .type _foo, STT_TLS # aka @tls_object
499 case MCSA_ELF_TypeCommon: /// .type _foo, STT_COMMON # aka @common
500 case MCSA_ELF_TypeNoType: /// .type _foo, STT_NOTYPE # aka @notype
501 case MCSA_ELF_TypeGnuUniqueObject: /// .type _foo, @gnu_unique_object
502 if (!MAI->hasDotTypeDotSizeDirective())
503 return false; // Symbol attribute not supported
505 Symbol->print(OS, MAI);
506 OS << ',' << ((MAI->getCommentString()[0] != '@') ? '@' : '%');
508 default: return false;
509 case MCSA_ELF_TypeFunction: OS << "function"; break;
510 case MCSA_ELF_TypeIndFunction: OS << "gnu_indirect_function"; break;
511 case MCSA_ELF_TypeObject: OS << "object"; break;
512 case MCSA_ELF_TypeTLS: OS << "tls_object"; break;
513 case MCSA_ELF_TypeCommon: OS << "common"; break;
514 case MCSA_ELF_TypeNoType: OS << "no_type"; break;
515 case MCSA_ELF_TypeGnuUniqueObject: OS << "gnu_unique_object"; break;
519 case MCSA_Global: // .globl/.global
520 OS << MAI->getGlobalDirective();
522 case MCSA_Hidden: OS << "\t.hidden\t"; break;
523 case MCSA_IndirectSymbol: OS << "\t.indirect_symbol\t"; break;
524 case MCSA_Internal: OS << "\t.internal\t"; break;
525 case MCSA_LazyReference: OS << "\t.lazy_reference\t"; break;
526 case MCSA_Local: OS << "\t.local\t"; break;
527 case MCSA_NoDeadStrip:
528 if (!MAI->hasNoDeadStrip())
530 OS << "\t.no_dead_strip\t";
532 case MCSA_SymbolResolver: OS << "\t.symbol_resolver\t"; break;
533 case MCSA_AltEntry: OS << "\t.alt_entry\t"; break;
534 case MCSA_PrivateExtern:
535 OS << "\t.private_extern\t";
537 case MCSA_Protected: OS << "\t.protected\t"; break;
538 case MCSA_Reference: OS << "\t.reference\t"; break;
539 case MCSA_Weak: OS << MAI->getWeakDirective(); break;
540 case MCSA_WeakDefinition:
541 OS << "\t.weak_definition\t";
544 case MCSA_WeakReference: OS << MAI->getWeakRefDirective(); break;
545 case MCSA_WeakDefAutoPrivate: OS << "\t.weak_def_can_be_hidden\t"; break;
548 Symbol->print(OS, MAI);
554 void MCAsmStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
555 OS << ".desc" << ' ';
556 Symbol->print(OS, MAI);
557 OS << ',' << DescValue;
561 void MCAsmStreamer::EmitSyntaxDirective() {
562 if (MAI->getAssemblerDialect() == 1) {
563 OS << "\t.intel_syntax noprefix";
566 // FIXME: Currently emit unprefix'ed registers.
567 // The intel_syntax directive has one optional argument
568 // with may have a value of prefix or noprefix.
571 void MCAsmStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {
573 Symbol->print(OS, MAI);
578 void MCAsmStreamer::EmitCOFFSymbolStorageClass (int StorageClass) {
579 OS << "\t.scl\t" << StorageClass << ';';
583 void MCAsmStreamer::EmitCOFFSymbolType (int Type) {
584 OS << "\t.type\t" << Type << ';';
588 void MCAsmStreamer::EndCOFFSymbolDef() {
593 void MCAsmStreamer::EmitCOFFSafeSEH(MCSymbol const *Symbol) {
594 OS << "\t.safeseh\t";
595 Symbol->print(OS, MAI);
599 void MCAsmStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
601 Symbol->print(OS, MAI);
605 void MCAsmStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
606 OS << "\t.secrel32\t";
607 Symbol->print(OS, MAI);
611 void MCAsmStreamer::emitELFSize(MCSymbolELF *Symbol, const MCExpr *Value) {
612 assert(MAI->hasDotTypeDotSizeDirective());
614 Symbol->print(OS, MAI);
616 Value->print(OS, MAI);
620 void MCAsmStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
621 unsigned ByteAlignment) {
623 Symbol->print(OS, MAI);
626 if (ByteAlignment != 0) {
627 if (MAI->getCOMMDirectiveAlignmentIsInBytes())
628 OS << ',' << ByteAlignment;
630 OS << ',' << Log2_32(ByteAlignment);
635 /// EmitLocalCommonSymbol - Emit a local common (.lcomm) symbol.
637 /// @param Symbol - The common symbol to emit.
638 /// @param Size - The size of the common symbol.
639 void MCAsmStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
640 unsigned ByteAlign) {
642 Symbol->print(OS, MAI);
646 switch (MAI->getLCOMMDirectiveAlignmentType()) {
647 case LCOMM::NoAlignment:
648 llvm_unreachable("alignment not supported on .lcomm!");
649 case LCOMM::ByteAlignment:
650 OS << ',' << ByteAlign;
652 case LCOMM::Log2Alignment:
653 assert(isPowerOf2_32(ByteAlign) && "alignment must be a power of 2");
654 OS << ',' << Log2_32(ByteAlign);
661 void MCAsmStreamer::EmitZerofill(MCSection *Section, MCSymbol *Symbol,
662 uint64_t Size, unsigned ByteAlignment) {
664 AssignFragment(Symbol, &Section->getDummyFragment());
666 // Note: a .zerofill directive does not switch sections.
669 // This is a mach-o specific directive.
670 const MCSectionMachO *MOSection = ((const MCSectionMachO*)Section);
671 OS << MOSection->getSegmentName() << "," << MOSection->getSectionName();
675 Symbol->print(OS, MAI);
677 if (ByteAlignment != 0)
678 OS << ',' << Log2_32(ByteAlignment);
683 // .tbss sym, size, align
684 // This depends that the symbol has already been mangled from the original,
686 void MCAsmStreamer::EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol,
687 uint64_t Size, unsigned ByteAlignment) {
688 AssignFragment(Symbol, &Section->getDummyFragment());
690 assert(Symbol && "Symbol shouldn't be NULL!");
691 // Instead of using the Section we'll just use the shortcut.
692 // This is a mach-o specific directive and section.
694 Symbol->print(OS, MAI);
697 // Output align if we have it. We default to 1 so don't bother printing
699 if (ByteAlignment > 1) OS << ", " << Log2_32(ByteAlignment);
704 static inline char toOctal(int X) { return (X&7)+'0'; }
706 static void PrintQuotedString(StringRef Data, raw_ostream &OS) {
709 for (unsigned i = 0, e = Data.size(); i != e; ++i) {
710 unsigned char C = Data[i];
711 if (C == '"' || C == '\\') {
712 OS << '\\' << (char)C;
716 if (isprint((unsigned char)C)) {
722 case '\b': OS << "\\b"; break;
723 case '\f': OS << "\\f"; break;
724 case '\n': OS << "\\n"; break;
725 case '\r': OS << "\\r"; break;
726 case '\t': OS << "\\t"; break;
729 OS << toOctal(C >> 6);
730 OS << toOctal(C >> 3);
731 OS << toOctal(C >> 0);
739 void MCAsmStreamer::EmitBytes(StringRef Data) {
740 assert(getCurrentSection().first &&
741 "Cannot emit contents before setting section!");
742 if (Data.empty()) return;
744 if (Data.size() == 1) {
745 OS << MAI->getData8bitsDirective();
746 OS << (unsigned)(unsigned char)Data[0];
751 // If the data ends with 0 and the target supports .asciz, use it, otherwise
753 if (MAI->getAscizDirective() && Data.back() == 0) {
754 OS << MAI->getAscizDirective();
755 Data = Data.substr(0, Data.size()-1);
757 OS << MAI->getAsciiDirective();
760 PrintQuotedString(Data, OS);
764 void MCAsmStreamer::EmitBinaryData(StringRef Data) {
765 // This is binary data. Print it in a grid of hex bytes for readability.
766 const size_t Cols = 4;
767 for (size_t I = 0, EI = alignTo(Data.size(), Cols); I < EI; I += Cols) {
768 size_t J = I, EJ = std::min(I + Cols, Data.size());
770 OS << MAI->getData8bitsDirective();
771 for (; J < EJ - 1; ++J)
772 OS << format("0x%02x", uint8_t(Data[J])) << ", ";
773 OS << format("0x%02x", uint8_t(Data[J]));
778 void MCAsmStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
779 EmitValue(MCConstantExpr::create(Value, getContext()), Size);
782 void MCAsmStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
784 assert(Size <= 8 && "Invalid size");
785 assert(getCurrentSection().first &&
786 "Cannot emit contents before setting section!");
787 const char *Directive = nullptr;
790 case 1: Directive = MAI->getData8bitsDirective(); break;
791 case 2: Directive = MAI->getData16bitsDirective(); break;
792 case 4: Directive = MAI->getData32bitsDirective(); break;
793 case 8: Directive = MAI->getData64bitsDirective(); break;
798 if (!Value->evaluateAsAbsolute(IntValue))
799 report_fatal_error("Don't know how to emit this value.");
801 // We couldn't handle the requested integer size so we fallback by breaking
802 // the request down into several, smaller, integers.
803 // Since sizes greater or equal to "Size" are invalid, we use the greatest
804 // power of 2 that is less than "Size" as our largest piece of granularity.
805 bool IsLittleEndian = MAI->isLittleEndian();
806 for (unsigned Emitted = 0; Emitted != Size;) {
807 unsigned Remaining = Size - Emitted;
808 // The size of our partial emission must be a power of two less than
810 unsigned EmissionSize = PowerOf2Floor(std::min(Remaining, Size - 1));
811 // Calculate the byte offset of our partial emission taking into account
812 // the endianness of the target.
813 unsigned ByteOffset =
814 IsLittleEndian ? Emitted : (Remaining - EmissionSize);
815 uint64_t ValueToEmit = IntValue >> (ByteOffset * 8);
816 // We truncate our partial emission to fit within the bounds of the
817 // emission domain. This produces nicer output and silences potential
818 // truncation warnings when round tripping through another assembler.
819 uint64_t Shift = 64 - EmissionSize * 8;
820 assert(Shift < static_cast<uint64_t>(
821 std::numeric_limits<unsigned long long>::digits) &&
822 "undefined behavior");
823 ValueToEmit &= ~0ULL >> Shift;
824 EmitIntValue(ValueToEmit, EmissionSize);
825 Emitted += EmissionSize;
830 assert(Directive && "Invalid size for machine code value!");
832 Value->print(OS, MAI);
836 void MCAsmStreamer::EmitULEB128Value(const MCExpr *Value) {
838 if (Value->evaluateAsAbsolute(IntValue)) {
839 EmitULEB128IntValue(IntValue);
843 Value->print(OS, MAI);
847 void MCAsmStreamer::EmitSLEB128Value(const MCExpr *Value) {
849 if (Value->evaluateAsAbsolute(IntValue)) {
850 EmitSLEB128IntValue(IntValue);
854 Value->print(OS, MAI);
858 void MCAsmStreamer::EmitGPRel64Value(const MCExpr *Value) {
859 assert(MAI->getGPRel64Directive() != nullptr);
860 OS << MAI->getGPRel64Directive();
861 Value->print(OS, MAI);
865 void MCAsmStreamer::EmitGPRel32Value(const MCExpr *Value) {
866 assert(MAI->getGPRel32Directive() != nullptr);
867 OS << MAI->getGPRel32Directive();
868 Value->print(OS, MAI);
872 /// emitFill - Emit NumBytes bytes worth of the value specified by
873 /// FillValue. This implements directives such as '.space'.
874 void MCAsmStreamer::emitFill(uint64_t NumBytes, uint8_t FillValue) {
875 if (NumBytes == 0) return;
877 const MCExpr *E = MCConstantExpr::create(NumBytes, getContext());
878 emitFill(*E, FillValue);
881 void MCAsmStreamer::emitFill(const MCExpr &NumBytes, uint64_t FillValue,
883 if (const char *ZeroDirective = MAI->getZeroDirective()) {
884 // FIXME: Emit location directives
886 NumBytes.print(OS, MAI);
888 OS << ',' << (int)FillValue;
893 MCStreamer::emitFill(NumBytes, FillValue);
896 void MCAsmStreamer::emitFill(uint64_t NumValues, int64_t Size, int64_t Expr) {
900 const MCExpr *E = MCConstantExpr::create(NumValues, getContext());
901 emitFill(*E, Size, Expr);
904 void MCAsmStreamer::emitFill(const MCExpr &NumValues, int64_t Size,
905 int64_t Expr, SMLoc Loc) {
906 // FIXME: Emit location directives
908 NumValues.print(OS, MAI);
909 OS << ", " << Size << ", 0x";
910 OS.write_hex(truncateToSize(Expr, 4));
914 void MCAsmStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
916 unsigned MaxBytesToEmit) {
917 // Some assemblers don't support non-power of two alignments, so we always
918 // emit alignments as a power of two if possible.
919 if (isPowerOf2_32(ByteAlignment)) {
922 llvm_unreachable("Invalid size for machine code value!");
924 OS << "\t.p2align\t";
933 llvm_unreachable("Unsupported alignment size!");
936 OS << Log2_32(ByteAlignment);
938 if (Value || MaxBytesToEmit) {
940 OS.write_hex(truncateToSize(Value, ValueSize));
943 OS << ", " << MaxBytesToEmit;
949 // Non-power of two alignment. This is not widely supported by assemblers.
950 // FIXME: Parameterize this based on MAI.
952 default: llvm_unreachable("Invalid size for machine code value!");
953 case 1: OS << ".balign"; break;
954 case 2: OS << ".balignw"; break;
955 case 4: OS << ".balignl"; break;
956 case 8: llvm_unreachable("Unsupported alignment size!");
959 OS << ' ' << ByteAlignment;
960 OS << ", " << truncateToSize(Value, ValueSize);
962 OS << ", " << MaxBytesToEmit;
966 void MCAsmStreamer::EmitCodeAlignment(unsigned ByteAlignment,
967 unsigned MaxBytesToEmit) {
968 // Emit with a text fill value.
969 EmitValueToAlignment(ByteAlignment, MAI->getTextAlignFillValue(),
973 void MCAsmStreamer::emitValueToOffset(const MCExpr *Offset,
974 unsigned char Value) {
975 // FIXME: Verify that Offset is associated with the current section.
977 Offset->print(OS, MAI);
978 OS << ", " << (unsigned)Value;
982 void MCAsmStreamer::EmitFileDirective(StringRef Filename) {
983 assert(MAI->hasSingleParameterDotFile());
985 PrintQuotedString(Filename, OS);
989 unsigned MCAsmStreamer::EmitDwarfFileDirective(unsigned FileNo,
995 MCDwarfLineTable &Table = getContext().getMCDwarfLineTable(CUID);
996 unsigned NumFiles = Table.getMCDwarfFiles().size();
997 FileNo = Table.getFile(Directory, Filename, FileNo);
1000 if (NumFiles == Table.getMCDwarfFiles().size())
1003 SmallString<128> FullPathName;
1005 if (!UseDwarfDirectory && !Directory.empty()) {
1006 if (sys::path::is_absolute(Filename))
1009 FullPathName = Directory;
1010 sys::path::append(FullPathName, Filename);
1012 Filename = FullPathName;
1016 OS << "\t.file\t" << FileNo << ' ';
1017 if (!Directory.empty()) {
1018 PrintQuotedString(Directory, OS);
1021 PrintQuotedString(Filename, OS);
1027 void MCAsmStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
1028 unsigned Column, unsigned Flags,
1030 unsigned Discriminator,
1031 StringRef FileName) {
1032 OS << "\t.loc\t" << FileNo << " " << Line << " " << Column;
1033 if (Flags & DWARF2_FLAG_BASIC_BLOCK)
1034 OS << " basic_block";
1035 if (Flags & DWARF2_FLAG_PROLOGUE_END)
1036 OS << " prologue_end";
1037 if (Flags & DWARF2_FLAG_EPILOGUE_BEGIN)
1038 OS << " epilogue_begin";
1040 unsigned OldFlags = getContext().getCurrentDwarfLoc().getFlags();
1041 if ((Flags & DWARF2_FLAG_IS_STMT) != (OldFlags & DWARF2_FLAG_IS_STMT)) {
1044 if (Flags & DWARF2_FLAG_IS_STMT)
1051 OS << " isa " << Isa;
1053 OS << " discriminator " << Discriminator;
1056 OS.PadToColumn(MAI->getCommentColumn());
1057 OS << MAI->getCommentString() << ' ' << FileName << ':'
1058 << Line << ':' << Column;
1061 this->MCStreamer::EmitDwarfLocDirective(FileNo, Line, Column, Flags,
1062 Isa, Discriminator, FileName);
1065 MCSymbol *MCAsmStreamer::getDwarfLineTableSymbol(unsigned CUID) {
1066 // Always use the zeroth line table, since asm syntax only supports one line
1068 return MCStreamer::getDwarfLineTableSymbol(0);
1071 unsigned MCAsmStreamer::EmitCVFileDirective(unsigned FileNo,
1072 StringRef Filename) {
1073 if (!getContext().getCVFile(Filename, FileNo))
1076 OS << "\t.cv_file\t" << FileNo << ' ';
1078 PrintQuotedString(Filename, OS);
1084 void MCAsmStreamer::EmitCVLocDirective(unsigned FunctionId, unsigned FileNo,
1085 unsigned Line, unsigned Column,
1086 bool PrologueEnd, bool IsStmt,
1087 StringRef FileName) {
1088 OS << "\t.cv_loc\t" << FunctionId << " " << FileNo << " " << Line << " "
1091 OS << " prologue_end";
1093 unsigned OldIsStmt = getContext().getCurrentCVLoc().isStmt();
1094 if (IsStmt != OldIsStmt) {
1104 OS.PadToColumn(MAI->getCommentColumn());
1105 OS << MAI->getCommentString() << ' ' << FileName << ':'
1106 << Line << ':' << Column;
1109 this->MCStreamer::EmitCVLocDirective(FunctionId, FileNo, Line, Column,
1110 PrologueEnd, IsStmt, FileName);
1113 void MCAsmStreamer::EmitCVLinetableDirective(unsigned FunctionId,
1114 const MCSymbol *FnStart,
1115 const MCSymbol *FnEnd) {
1116 OS << "\t.cv_linetable\t" << FunctionId << ", ";
1117 FnStart->print(OS, MAI);
1119 FnEnd->print(OS, MAI);
1121 this->MCStreamer::EmitCVLinetableDirective(FunctionId, FnStart, FnEnd);
1124 void MCAsmStreamer::EmitCVInlineLinetableDirective(
1125 unsigned PrimaryFunctionId, unsigned SourceFileId, unsigned SourceLineNum,
1126 const MCSymbol *FnStartSym, const MCSymbol *FnEndSym,
1127 ArrayRef<unsigned> SecondaryFunctionIds) {
1128 OS << "\t.cv_inline_linetable\t" << PrimaryFunctionId << ' ' << SourceFileId
1129 << ' ' << SourceLineNum << ' ';
1130 FnStartSym->print(OS, MAI);
1132 FnEndSym->print(OS, MAI);
1133 if (!SecondaryFunctionIds.empty()) {
1135 for (unsigned SecondaryFunctionId : SecondaryFunctionIds)
1136 OS << ' ' << SecondaryFunctionId;
1139 this->MCStreamer::EmitCVInlineLinetableDirective(
1140 PrimaryFunctionId, SourceFileId, SourceLineNum, FnStartSym, FnEndSym,
1141 SecondaryFunctionIds);
1144 void MCAsmStreamer::EmitCVDefRangeDirective(
1145 ArrayRef<std::pair<const MCSymbol *, const MCSymbol *>> Ranges,
1146 StringRef FixedSizePortion) {
1147 OS << "\t.cv_def_range\t";
1148 for (std::pair<const MCSymbol *, const MCSymbol *> Range : Ranges) {
1150 Range.first->print(OS, MAI);
1152 Range.second->print(OS, MAI);
1155 PrintQuotedString(FixedSizePortion, OS);
1157 this->MCStreamer::EmitCVDefRangeDirective(Ranges, FixedSizePortion);
1160 void MCAsmStreamer::EmitCVStringTableDirective() {
1161 OS << "\t.cv_stringtable";
1165 void MCAsmStreamer::EmitCVFileChecksumsDirective() {
1166 OS << "\t.cv_filechecksums";
1170 void MCAsmStreamer::EmitIdent(StringRef IdentString) {
1171 assert(MAI->hasIdentDirective() && ".ident directive not supported");
1173 PrintQuotedString(IdentString, OS);
1177 void MCAsmStreamer::EmitCFISections(bool EH, bool Debug) {
1178 MCStreamer::EmitCFISections(EH, Debug);
1179 OS << "\t.cfi_sections ";
1183 OS << ", .debug_frame";
1185 OS << ".debug_frame";
1191 void MCAsmStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
1192 OS << "\t.cfi_startproc";
1198 void MCAsmStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
1199 MCStreamer::EmitCFIEndProcImpl(Frame);
1200 OS << "\t.cfi_endproc";
1204 void MCAsmStreamer::EmitRegisterName(int64_t Register) {
1205 if (!MAI->useDwarfRegNumForCFI()) {
1206 const MCRegisterInfo *MRI = getContext().getRegisterInfo();
1207 unsigned LLVMRegister = MRI->getLLVMRegNum(Register, true);
1208 InstPrinter->printRegName(OS, LLVMRegister);
1214 void MCAsmStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
1215 MCStreamer::EmitCFIDefCfa(Register, Offset);
1216 OS << "\t.cfi_def_cfa ";
1217 EmitRegisterName(Register);
1218 OS << ", " << Offset;
1222 void MCAsmStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
1223 MCStreamer::EmitCFIDefCfaOffset(Offset);
1224 OS << "\t.cfi_def_cfa_offset " << Offset;
1228 static void PrintCFIEscape(llvm::formatted_raw_ostream &OS, StringRef Values) {
1229 OS << "\t.cfi_escape ";
1230 if (!Values.empty()) {
1231 size_t e = Values.size() - 1;
1232 for (size_t i = 0; i < e; ++i)
1233 OS << format("0x%02x", uint8_t(Values[i])) << ", ";
1234 OS << format("0x%02x", uint8_t(Values[e]));
1238 void MCAsmStreamer::EmitCFIEscape(StringRef Values) {
1239 MCStreamer::EmitCFIEscape(Values);
1240 PrintCFIEscape(OS, Values);
1244 void MCAsmStreamer::EmitCFIGnuArgsSize(int64_t Size) {
1245 MCStreamer::EmitCFIGnuArgsSize(Size);
1247 uint8_t Buffer[16] = { dwarf::DW_CFA_GNU_args_size };
1248 unsigned Len = encodeULEB128(Size, Buffer + 1) + 1;
1250 PrintCFIEscape(OS, StringRef((const char *)&Buffer[0], Len));
1254 void MCAsmStreamer::EmitCFIDefCfaRegister(int64_t Register) {
1255 MCStreamer::EmitCFIDefCfaRegister(Register);
1256 OS << "\t.cfi_def_cfa_register ";
1257 EmitRegisterName(Register);
1261 void MCAsmStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
1262 this->MCStreamer::EmitCFIOffset(Register, Offset);
1263 OS << "\t.cfi_offset ";
1264 EmitRegisterName(Register);
1265 OS << ", " << Offset;
1269 void MCAsmStreamer::EmitCFIPersonality(const MCSymbol *Sym,
1270 unsigned Encoding) {
1271 MCStreamer::EmitCFIPersonality(Sym, Encoding);
1272 OS << "\t.cfi_personality " << Encoding << ", ";
1273 Sym->print(OS, MAI);
1277 void MCAsmStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
1278 MCStreamer::EmitCFILsda(Sym, Encoding);
1279 OS << "\t.cfi_lsda " << Encoding << ", ";
1280 Sym->print(OS, MAI);
1284 void MCAsmStreamer::EmitCFIRememberState() {
1285 MCStreamer::EmitCFIRememberState();
1286 OS << "\t.cfi_remember_state";
1290 void MCAsmStreamer::EmitCFIRestoreState() {
1291 MCStreamer::EmitCFIRestoreState();
1292 OS << "\t.cfi_restore_state";
1296 void MCAsmStreamer::EmitCFISameValue(int64_t Register) {
1297 MCStreamer::EmitCFISameValue(Register);
1298 OS << "\t.cfi_same_value ";
1299 EmitRegisterName(Register);
1303 void MCAsmStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
1304 MCStreamer::EmitCFIRelOffset(Register, Offset);
1305 OS << "\t.cfi_rel_offset ";
1306 EmitRegisterName(Register);
1307 OS << ", " << Offset;
1311 void MCAsmStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
1312 MCStreamer::EmitCFIAdjustCfaOffset(Adjustment);
1313 OS << "\t.cfi_adjust_cfa_offset " << Adjustment;
1317 void MCAsmStreamer::EmitCFISignalFrame() {
1318 MCStreamer::EmitCFISignalFrame();
1319 OS << "\t.cfi_signal_frame";
1323 void MCAsmStreamer::EmitCFIUndefined(int64_t Register) {
1324 MCStreamer::EmitCFIUndefined(Register);
1325 OS << "\t.cfi_undefined " << Register;
1329 void MCAsmStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
1330 MCStreamer::EmitCFIRegister(Register1, Register2);
1331 OS << "\t.cfi_register " << Register1 << ", " << Register2;
1335 void MCAsmStreamer::EmitCFIWindowSave() {
1336 MCStreamer::EmitCFIWindowSave();
1337 OS << "\t.cfi_window_save";
1341 void MCAsmStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol) {
1342 MCStreamer::EmitWinCFIStartProc(Symbol);
1345 Symbol->print(OS, MAI);
1349 void MCAsmStreamer::EmitWinCFIEndProc() {
1350 MCStreamer::EmitWinCFIEndProc();
1352 OS << "\t.seh_endproc";
1356 void MCAsmStreamer::EmitWinCFIStartChained() {
1357 MCStreamer::EmitWinCFIStartChained();
1359 OS << "\t.seh_startchained";
1363 void MCAsmStreamer::EmitWinCFIEndChained() {
1364 MCStreamer::EmitWinCFIEndChained();
1366 OS << "\t.seh_endchained";
1370 void MCAsmStreamer::EmitWinEHHandler(const MCSymbol *Sym, bool Unwind,
1372 MCStreamer::EmitWinEHHandler(Sym, Unwind, Except);
1374 OS << "\t.seh_handler ";
1375 Sym->print(OS, MAI);
1383 void MCAsmStreamer::EmitWinEHHandlerData() {
1384 MCStreamer::EmitWinEHHandlerData();
1386 // Switch sections. Don't call SwitchSection directly, because that will
1387 // cause the section switch to be visible in the emitted assembly.
1388 // We only do this so the section switch that terminates the handler
1389 // data block is visible.
1390 WinEH::FrameInfo *CurFrame = getCurrentWinFrameInfo();
1391 MCSection *TextSec = &CurFrame->Function->getSection();
1392 MCSection *XData = getAssociatedXDataSection(TextSec);
1393 SwitchSectionNoChange(XData);
1395 OS << "\t.seh_handlerdata";
1399 void MCAsmStreamer::EmitWinCFIPushReg(unsigned Register) {
1400 MCStreamer::EmitWinCFIPushReg(Register);
1402 OS << "\t.seh_pushreg " << Register;
1406 void MCAsmStreamer::EmitWinCFISetFrame(unsigned Register, unsigned Offset) {
1407 MCStreamer::EmitWinCFISetFrame(Register, Offset);
1409 OS << "\t.seh_setframe " << Register << ", " << Offset;
1413 void MCAsmStreamer::EmitWinCFIAllocStack(unsigned Size) {
1414 MCStreamer::EmitWinCFIAllocStack(Size);
1416 OS << "\t.seh_stackalloc " << Size;
1420 void MCAsmStreamer::EmitWinCFISaveReg(unsigned Register, unsigned Offset) {
1421 MCStreamer::EmitWinCFISaveReg(Register, Offset);
1423 OS << "\t.seh_savereg " << Register << ", " << Offset;
1427 void MCAsmStreamer::EmitWinCFISaveXMM(unsigned Register, unsigned Offset) {
1428 MCStreamer::EmitWinCFISaveXMM(Register, Offset);
1430 OS << "\t.seh_savexmm " << Register << ", " << Offset;
1434 void MCAsmStreamer::EmitWinCFIPushFrame(bool Code) {
1435 MCStreamer::EmitWinCFIPushFrame(Code);
1437 OS << "\t.seh_pushframe";
1443 void MCAsmStreamer::EmitWinCFIEndProlog() {
1444 MCStreamer::EmitWinCFIEndProlog();
1446 OS << "\t.seh_endprologue";
1450 void MCAsmStreamer::AddEncodingComment(const MCInst &Inst,
1451 const MCSubtargetInfo &STI) {
1452 raw_ostream &OS = GetCommentOS();
1453 SmallString<256> Code;
1454 SmallVector<MCFixup, 4> Fixups;
1455 raw_svector_ostream VecOS(Code);
1456 Emitter->encodeInstruction(Inst, VecOS, Fixups, STI);
1458 // If we are showing fixups, create symbolic markers in the encoded
1459 // representation. We do this by making a per-bit map to the fixup item index,
1460 // then trying to display it as nicely as possible.
1461 SmallVector<uint8_t, 64> FixupMap;
1462 FixupMap.resize(Code.size() * 8);
1463 for (unsigned i = 0, e = Code.size() * 8; i != e; ++i)
1466 for (unsigned i = 0, e = Fixups.size(); i != e; ++i) {
1467 MCFixup &F = Fixups[i];
1468 const MCFixupKindInfo &Info = AsmBackend->getFixupKindInfo(F.getKind());
1469 for (unsigned j = 0; j != Info.TargetSize; ++j) {
1470 unsigned Index = F.getOffset() * 8 + Info.TargetOffset + j;
1471 assert(Index < Code.size() * 8 && "Invalid offset in fixup!");
1472 FixupMap[Index] = 1 + i;
1476 // FIXME: Note the fixup comments for Thumb2 are completely bogus since the
1477 // high order halfword of a 32-bit Thumb2 instruction is emitted first.
1478 OS << "encoding: [";
1479 for (unsigned i = 0, e = Code.size(); i != e; ++i) {
1483 // See if all bits are the same map entry.
1484 uint8_t MapEntry = FixupMap[i * 8 + 0];
1485 for (unsigned j = 1; j != 8; ++j) {
1486 if (FixupMap[i * 8 + j] == MapEntry)
1489 MapEntry = uint8_t(~0U);
1493 if (MapEntry != uint8_t(~0U)) {
1494 if (MapEntry == 0) {
1495 OS << format("0x%02x", uint8_t(Code[i]));
1498 // FIXME: Some of the 8 bits require fix up.
1499 OS << format("0x%02x", uint8_t(Code[i])) << '\''
1500 << char('A' + MapEntry - 1) << '\'';
1502 OS << char('A' + MapEntry - 1);
1505 // Otherwise, write out in binary.
1507 for (unsigned j = 8; j--;) {
1508 unsigned Bit = (Code[i] >> j) & 1;
1511 if (MAI->isLittleEndian())
1512 FixupBit = i * 8 + j;
1514 FixupBit = i * 8 + (7-j);
1516 if (uint8_t MapEntry = FixupMap[FixupBit]) {
1517 assert(Bit == 0 && "Encoder wrote into fixed up bit!");
1518 OS << char('A' + MapEntry - 1);
1526 for (unsigned i = 0, e = Fixups.size(); i != e; ++i) {
1527 MCFixup &F = Fixups[i];
1528 const MCFixupKindInfo &Info = AsmBackend->getFixupKindInfo(F.getKind());
1529 OS << " fixup " << char('A' + i) << " - " << "offset: " << F.getOffset()
1530 << ", value: " << *F.getValue() << ", kind: " << Info.Name << "\n";
1534 void MCAsmStreamer::EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) {
1535 assert(getCurrentSection().first &&
1536 "Cannot emit contents before setting section!");
1538 // Show the encoding in a comment if we have a code emitter.
1540 AddEncodingComment(Inst, STI);
1542 // Show the MCInst if enabled.
1544 Inst.dump_pretty(GetCommentOS(), InstPrinter.get(), "\n ");
1545 GetCommentOS() << "\n";
1548 if(getTargetStreamer())
1549 getTargetStreamer()->prettyPrintAsm(*InstPrinter, OS, Inst, STI);
1551 InstPrinter->printInst(&Inst, OS, "", STI);
1556 void MCAsmStreamer::EmitBundleAlignMode(unsigned AlignPow2) {
1557 OS << "\t.bundle_align_mode " << AlignPow2;
1561 void MCAsmStreamer::EmitBundleLock(bool AlignToEnd) {
1562 OS << "\t.bundle_lock";
1564 OS << " align_to_end";
1568 void MCAsmStreamer::EmitBundleUnlock() {
1569 OS << "\t.bundle_unlock";
1573 bool MCAsmStreamer::EmitRelocDirective(const MCExpr &Offset, StringRef Name,
1574 const MCExpr *Expr, SMLoc) {
1576 Offset.print(OS, MAI);
1580 Expr->print(OS, MAI);
1586 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
1587 /// the specified string in the output .s file. This capability is
1588 /// indicated by the hasRawTextSupport() predicate.
1589 void MCAsmStreamer::EmitRawTextImpl(StringRef String) {
1590 if (!String.empty() && String.back() == '\n')
1591 String = String.substr(0, String.size()-1);
1596 void MCAsmStreamer::FinishImpl() {
1597 // If we are generating dwarf for assembly source files dump out the sections.
1598 if (getContext().getGenDwarfForAssembly())
1599 MCGenDwarfInfo::Emit(this);
1601 // Emit the label for the line table, if requested - since the rest of the
1602 // line table will be defined by .loc/.file directives, and not emitted
1603 // directly, the label is the only work required here.
1604 auto &Tables = getContext().getMCDwarfLineTables();
1605 if (!Tables.empty()) {
1606 assert(Tables.size() == 1 && "asm output only supports one line table");
1607 if (auto *Label = Tables.begin()->second.getLabel()) {
1608 SwitchSection(getContext().getObjectFileInfo()->getDwarfLineSection());
1614 MCStreamer *llvm::createAsmStreamer(MCContext &Context,
1615 std::unique_ptr<formatted_raw_ostream> OS,
1616 bool isVerboseAsm, bool useDwarfDirectory,
1617 MCInstPrinter *IP, MCCodeEmitter *CE,
1618 MCAsmBackend *MAB, bool ShowInst) {
1619 return new MCAsmStreamer(Context, std::move(OS), isVerboseAsm,
1620 useDwarfDirectory, IP, CE, MAB, ShowInst);