Bug Summary

File:lib/MC/MCAsmStreamer.cpp
Location:line 685, column 28
Description:The result of the '>>' expression is undefined

Annotated Source Code

1//===- lib/MC/MCAsmStreamer.cpp - Text Assembly Output --------------------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "llvm/MC/MCStreamer.h"
11#include "llvm/ADT/SmallString.h"
12#include "llvm/ADT/STLExtras.h"
13#include "llvm/ADT/StringExtras.h"
14#include "llvm/ADT/Twine.h"
15#include "llvm/MC/MCAsmBackend.h"
16#include "llvm/MC/MCAsmInfo.h"
17#include "llvm/MC/MCCodeEmitter.h"
18#include "llvm/MC/MCContext.h"
19#include "llvm/MC/MCExpr.h"
20#include "llvm/MC/MCFixupKindInfo.h"
21#include "llvm/MC/MCInst.h"
22#include "llvm/MC/MCInstPrinter.h"
23#include "llvm/MC/MCObjectFileInfo.h"
24#include "llvm/MC/MCRegisterInfo.h"
25#include "llvm/MC/MCSectionCOFF.h"
26#include "llvm/MC/MCSectionMachO.h"
27#include "llvm/MC/MCSymbol.h"
28#include "llvm/Support/CommandLine.h"
29#include "llvm/Support/ErrorHandling.h"
30#include "llvm/Support/Format.h"
31#include "llvm/Support/FormattedStream.h"
32#include "llvm/Support/MathExtras.h"
33#include "llvm/Support/Path.h"
34#include <cctype>
35#include <unordered_map>
36using namespace llvm;
37
38namespace {
39
40class MCAsmStreamer : public MCStreamer {
41protected:
42 formatted_raw_ostream &OS;
43 const MCAsmInfo *MAI;
44private:
45 std::unique_ptr<MCInstPrinter> InstPrinter;
46 std::unique_ptr<MCCodeEmitter> Emitter;
47 std::unique_ptr<MCAsmBackend> AsmBackend;
48
49 SmallString<128> CommentToEmit;
50 raw_svector_ostream CommentStream;
51
52 unsigned IsVerboseAsm : 1;
53 unsigned ShowInst : 1;
54 unsigned UseDwarfDirectory : 1;
55
56 void EmitRegisterName(int64_t Register);
57 void EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) override;
58 void EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) override;
59
60public:
61 MCAsmStreamer(MCContext &Context, formatted_raw_ostream &os,
62 bool isVerboseAsm, bool useDwarfDirectory,
63 MCInstPrinter *printer, MCCodeEmitter *emitter,
64 MCAsmBackend *asmbackend, bool showInst)
65 : MCStreamer(Context), OS(os), MAI(Context.getAsmInfo()),
66 InstPrinter(printer), Emitter(emitter), AsmBackend(asmbackend),
67 CommentStream(CommentToEmit), IsVerboseAsm(isVerboseAsm),
68 ShowInst(showInst), UseDwarfDirectory(useDwarfDirectory) {
69 if (InstPrinter && IsVerboseAsm)
70 InstPrinter->setCommentStream(CommentStream);
71 }
72
73 inline void EmitEOL() {
74 // If we don't have any comments, just emit a \n.
75 if (!IsVerboseAsm) {
76 OS << '\n';
77 return;
78 }
79 EmitCommentsAndEOL();
80 }
81 void EmitCommentsAndEOL();
82
83 /// isVerboseAsm - Return true if this streamer supports verbose assembly at
84 /// all.
85 bool isVerboseAsm() const override { return IsVerboseAsm; }
86
87 /// hasRawTextSupport - We support EmitRawText.
88 bool hasRawTextSupport() const override { return true; }
89
90 /// AddComment - Add a comment that can be emitted to the generated .s
91 /// file if applicable as a QoI issue to make the output of the compiler
92 /// more readable. This only affects the MCAsmStreamer, and only when
93 /// verbose assembly output is enabled.
94 void AddComment(const Twine &T) override;
95
96 /// AddEncodingComment - Add a comment showing the encoding of an instruction.
97 void AddEncodingComment(const MCInst &Inst, const MCSubtargetInfo &);
98
99 /// GetCommentOS - Return a raw_ostream that comments can be written to.
100 /// Unlike AddComment, you are required to terminate comments with \n if you
101 /// use this method.
102 raw_ostream &GetCommentOS() override {
103 if (!IsVerboseAsm)
104 return nulls(); // Discard comments unless in verbose asm mode.
105 return CommentStream;
106 }
107
108 void emitRawComment(const Twine &T, bool TabPrefix = true) override;
109
110 /// AddBlankLine - Emit a blank line to a .s file to pretty it up.
111 void AddBlankLine() override {
112 EmitEOL();
113 }
114
115 /// @name MCStreamer Interface
116 /// @{
117
118 void ChangeSection(const MCSection *Section,
119 const MCExpr *Subsection) override;
120
121 void EmitLOHDirective(MCLOHType Kind, const MCLOHArgs &Args) override;
122 void EmitLabel(MCSymbol *Symbol) override;
123
124 void EmitAssemblerFlag(MCAssemblerFlag Flag) override;
125 void EmitLinkerOptions(ArrayRef<std::string> Options) override;
126 void EmitDataRegion(MCDataRegionType Kind) override;
127 void EmitVersionMin(MCVersionMinType Kind, unsigned Major, unsigned Minor,
128 unsigned Update) override;
129 void EmitThumbFunc(MCSymbol *Func) override;
130
131 void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) override;
132 void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override;
133 bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override;
134
135 void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override;
136 void BeginCOFFSymbolDef(const MCSymbol *Symbol) override;
137 void EmitCOFFSymbolStorageClass(int StorageClass) override;
138 void EmitCOFFSymbolType(int Type) override;
139 void EndCOFFSymbolDef() override;
140 void EmitCOFFSectionIndex(MCSymbol const *Symbol) override;
141 void EmitCOFFSecRel32(MCSymbol const *Symbol) override;
142 void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) override;
143 void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
144 unsigned ByteAlignment) override;
145
146 /// EmitLocalCommonSymbol - Emit a local common (.lcomm) symbol.
147 ///
148 /// @param Symbol - The common symbol to emit.
149 /// @param Size - The size of the common symbol.
150 /// @param ByteAlignment - The alignment of the common symbol in bytes.
151 void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
152 unsigned ByteAlignment) override;
153
154 void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = nullptr,
155 uint64_t Size = 0, unsigned ByteAlignment = 0) override;
156
157 void EmitTBSSSymbol (const MCSection *Section, MCSymbol *Symbol,
158 uint64_t Size, unsigned ByteAlignment = 0) override;
159
160 void EmitBytes(StringRef Data) override;
161
162 void EmitValueImpl(const MCExpr *Value, unsigned Size,
163 const SMLoc &Loc = SMLoc()) override;
164 void EmitIntValue(uint64_t Value, unsigned Size) override;
165
166 void EmitULEB128Value(const MCExpr *Value) override;
167
168 void EmitSLEB128Value(const MCExpr *Value) override;
169
170 void EmitGPRel64Value(const MCExpr *Value) override;
171
172 void EmitGPRel32Value(const MCExpr *Value) override;
173
174
175 void EmitFill(uint64_t NumBytes, uint8_t FillValue) override;
176
177 void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
178 unsigned ValueSize = 1,
179 unsigned MaxBytesToEmit = 0) override;
180
181 void EmitCodeAlignment(unsigned ByteAlignment,
182 unsigned MaxBytesToEmit = 0) override;
183
184 bool EmitValueToOffset(const MCExpr *Offset,
185 unsigned char Value = 0) override;
186
187 void EmitFileDirective(StringRef Filename) override;
188 unsigned EmitDwarfFileDirective(unsigned FileNo, StringRef Directory,
189 StringRef Filename,
190 unsigned CUID = 0) override;
191 void EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
192 unsigned Column, unsigned Flags,
193 unsigned Isa, unsigned Discriminator,
194 StringRef FileName) override;
195 MCSymbol *getDwarfLineTableSymbol(unsigned CUID) override;
196
197 void EmitIdent(StringRef IdentString) override;
198 void EmitCFISections(bool EH, bool Debug) override;
199 void EmitCFIDefCfa(int64_t Register, int64_t Offset) override;
200 void EmitCFIDefCfaOffset(int64_t Offset) override;
201 void EmitCFIDefCfaRegister(int64_t Register) override;
202 void EmitCFIOffset(int64_t Register, int64_t Offset) override;
203 void EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding) override;
204 void EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) override;
205 void EmitCFIRememberState() override;
206 void EmitCFIRestoreState() override;
207 void EmitCFISameValue(int64_t Register) override;
208 void EmitCFIRelOffset(int64_t Register, int64_t Offset) override;
209 void EmitCFIAdjustCfaOffset(int64_t Adjustment) override;
210 void EmitCFISignalFrame() override;
211 void EmitCFIUndefined(int64_t Register) override;
212 void EmitCFIRegister(int64_t Register1, int64_t Register2) override;
213 void EmitCFIWindowSave() override;
214
215 void EmitWinCFIStartProc(const MCSymbol *Symbol) override;
216 void EmitWinCFIEndProc() override;
217 void EmitWinCFIStartChained() override;
218 void EmitWinCFIEndChained() override;
219 void EmitWinCFIPushReg(unsigned Register) override;
220 void EmitWinCFISetFrame(unsigned Register, unsigned Offset) override;
221 void EmitWinCFIAllocStack(unsigned Size) override;
222 void EmitWinCFISaveReg(unsigned Register, unsigned Offset) override;
223 void EmitWinCFISaveXMM(unsigned Register, unsigned Offset) override;
224 void EmitWinCFIPushFrame(bool Code) override;
225 void EmitWinCFIEndProlog() override;
226
227 void EmitWinEHHandler(const MCSymbol *Sym, bool Unwind, bool Except) override;
228 void EmitWinEHHandlerData() override;
229
230 void EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) override;
231
232 void EmitBundleAlignMode(unsigned AlignPow2) override;
233 void EmitBundleLock(bool AlignToEnd) override;
234 void EmitBundleUnlock() override;
235
236 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
237 /// the specified string in the output .s file. This capability is
238 /// indicated by the hasRawTextSupport() predicate.
239 void EmitRawTextImpl(StringRef String) override;
240
241 void FinishImpl() override;
242};
243
244} // end anonymous namespace.
245
246/// AddComment - Add a comment that can be emitted to the generated .s
247/// file if applicable as a QoI issue to make the output of the compiler
248/// more readable. This only affects the MCAsmStreamer, and only when
249/// verbose assembly output is enabled.
250void MCAsmStreamer::AddComment(const Twine &T) {
251 if (!IsVerboseAsm) return;
252
253 // Make sure that CommentStream is flushed.
254 CommentStream.flush();
255
256 T.toVector(CommentToEmit);
257 // Each comment goes on its own line.
258 CommentToEmit.push_back('\n');
259
260 // Tell the comment stream that the vector changed underneath it.
261 CommentStream.resync();
262}
263
264void MCAsmStreamer::EmitCommentsAndEOL() {
265 if (CommentToEmit.empty() && CommentStream.GetNumBytesInBuffer() == 0) {
266 OS << '\n';
267 return;
268 }
269
270 CommentStream.flush();
271 StringRef Comments = CommentToEmit.str();
272
273 assert(Comments.back() == '\n' &&((Comments.back() == '\n' && "Comment array not newline terminated"
) ? static_cast<void> (0) : __assert_fail ("Comments.back() == '\\n' && \"Comment array not newline terminated\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 274, __PRETTY_FUNCTION__))
274 "Comment array not newline terminated")((Comments.back() == '\n' && "Comment array not newline terminated"
) ? static_cast<void> (0) : __assert_fail ("Comments.back() == '\\n' && \"Comment array not newline terminated\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 274, __PRETTY_FUNCTION__))
;
275 do {
276 // Emit a line of comments.
277 OS.PadToColumn(MAI->getCommentColumn());
278 size_t Position = Comments.find('\n');
279 OS << MAI->getCommentString() << ' ' << Comments.substr(0, Position) <<'\n';
280
281 Comments = Comments.substr(Position+1);
282 } while (!Comments.empty());
283
284 CommentToEmit.clear();
285 // Tell the comment stream that the vector changed underneath it.
286 CommentStream.resync();
287}
288
289static inline int64_t truncateToSize(int64_t Value, unsigned Bytes) {
290 assert(Bytes && "Invalid size!")((Bytes && "Invalid size!") ? static_cast<void>
(0) : __assert_fail ("Bytes && \"Invalid size!\"", "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 290, __PRETTY_FUNCTION__))
;
291 return Value & ((uint64_t) (int64_t) -1 >> (64 - Bytes * 8));
292}
293
294void MCAsmStreamer::emitRawComment(const Twine &T, bool TabPrefix) {
295 if (TabPrefix)
296 OS << '\t';
297 OS << MAI->getCommentString() << T;
298 EmitEOL();
299}
300
301void MCAsmStreamer::ChangeSection(const MCSection *Section,
302 const MCExpr *Subsection) {
303 assert(Section && "Cannot switch to a null section!")((Section && "Cannot switch to a null section!") ? static_cast
<void> (0) : __assert_fail ("Section && \"Cannot switch to a null section!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 303, __PRETTY_FUNCTION__))
;
304 Section->PrintSwitchToSection(*MAI, OS, Subsection);
305}
306
307void MCAsmStreamer::EmitLabel(MCSymbol *Symbol) {
308 assert(Symbol->isUndefined() && "Cannot define a symbol twice!")((Symbol->isUndefined() && "Cannot define a symbol twice!"
) ? static_cast<void> (0) : __assert_fail ("Symbol->isUndefined() && \"Cannot define a symbol twice!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 308, __PRETTY_FUNCTION__))
;
309 MCStreamer::EmitLabel(Symbol);
310
311 OS << *Symbol << MAI->getLabelSuffix();
312 EmitEOL();
313}
314
315void MCAsmStreamer::EmitLOHDirective(MCLOHType Kind, const MCLOHArgs &Args) {
316 StringRef str = MCLOHIdToName(Kind);
317
318#ifndef NDEBUG
319 int NbArgs = MCLOHIdToNbArgs(Kind);
320 assert(NbArgs != -1 && ((size_t)NbArgs) == Args.size() && "Malformed LOH!")((NbArgs != -1 && ((size_t)NbArgs) == Args.size() &&
"Malformed LOH!") ? static_cast<void> (0) : __assert_fail
("NbArgs != -1 && ((size_t)NbArgs) == Args.size() && \"Malformed LOH!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 320, __PRETTY_FUNCTION__))
;
321 assert(str != "" && "Invalid LOH name")((str != "" && "Invalid LOH name") ? static_cast<void
> (0) : __assert_fail ("str != \"\" && \"Invalid LOH name\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 321, __PRETTY_FUNCTION__))
;
322#endif
323
324 OS << "\t" << MCLOHDirectiveName() << " " << str << "\t";
325 bool IsFirst = true;
326 for (MCLOHArgs::const_iterator It = Args.begin(), EndIt = Args.end();
327 It != EndIt; ++It) {
328 if (!IsFirst)
329 OS << ", ";
330 IsFirst = false;
331 OS << **It;
332 }
333 EmitEOL();
334}
335
336void MCAsmStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
337 switch (Flag) {
338 case MCAF_SyntaxUnified: OS << "\t.syntax unified"; break;
339 case MCAF_SubsectionsViaSymbols: OS << ".subsections_via_symbols"; break;
340 case MCAF_Code16: OS << '\t'<< MAI->getCode16Directive();break;
341 case MCAF_Code32: OS << '\t'<< MAI->getCode32Directive();break;
342 case MCAF_Code64: OS << '\t'<< MAI->getCode64Directive();break;
343 }
344 EmitEOL();
345}
346
347void MCAsmStreamer::EmitLinkerOptions(ArrayRef<std::string> Options) {
348 assert(!Options.empty() && "At least one option is required!")((!Options.empty() && "At least one option is required!"
) ? static_cast<void> (0) : __assert_fail ("!Options.empty() && \"At least one option is required!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 348, __PRETTY_FUNCTION__))
;
349 OS << "\t.linker_option \"" << Options[0] << '"';
350 for (ArrayRef<std::string>::iterator it = Options.begin() + 1,
351 ie = Options.end(); it != ie; ++it) {
352 OS << ", " << '"' << *it << '"';
353 }
354 OS << "\n";
355}
356
357void MCAsmStreamer::EmitDataRegion(MCDataRegionType Kind) {
358 if (!MAI->doesSupportDataRegionDirectives())
359 return;
360 switch (Kind) {
361 case MCDR_DataRegion: OS << "\t.data_region"; break;
362 case MCDR_DataRegionJT8: OS << "\t.data_region jt8"; break;
363 case MCDR_DataRegionJT16: OS << "\t.data_region jt16"; break;
364 case MCDR_DataRegionJT32: OS << "\t.data_region jt32"; break;
365 case MCDR_DataRegionEnd: OS << "\t.end_data_region"; break;
366 }
367 EmitEOL();
368}
369
370void MCAsmStreamer::EmitVersionMin(MCVersionMinType Kind, unsigned Major,
371 unsigned Minor, unsigned Update) {
372 switch (Kind) {
373 case MCVM_IOSVersionMin: OS << "\t.ios_version_min"; break;
374 case MCVM_OSXVersionMin: OS << "\t.macosx_version_min"; break;
375 }
376 OS << " " << Major << ", " << Minor;
377 if (Update)
378 OS << ", " << Update;
379 EmitEOL();
380}
381
382void MCAsmStreamer::EmitThumbFunc(MCSymbol *Func) {
383 // This needs to emit to a temporary string to get properly quoted
384 // MCSymbols when they have spaces in them.
385 OS << "\t.thumb_func";
386 // Only Mach-O hasSubsectionsViaSymbols()
387 if (MAI->hasSubsectionsViaSymbols())
388 OS << '\t' << *Func;
389 EmitEOL();
390}
391
392void MCAsmStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
393 OS << *Symbol << " = " << *Value;
394 EmitEOL();
395
396 MCStreamer::EmitAssignment(Symbol, Value);
397}
398
399void MCAsmStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {
400 OS << ".weakref " << *Alias << ", " << *Symbol;
401 EmitEOL();
402}
403
404bool MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
405 MCSymbolAttr Attribute) {
406 switch (Attribute) {
407 case MCSA_Invalid: llvm_unreachable("Invalid symbol attribute")::llvm::llvm_unreachable_internal("Invalid symbol attribute",
"/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 407)
;
408 case MCSA_ELF_TypeFunction: /// .type _foo, STT_FUNC # aka @function
409 case MCSA_ELF_TypeIndFunction: /// .type _foo, STT_GNU_IFUNC
410 case MCSA_ELF_TypeObject: /// .type _foo, STT_OBJECT # aka @object
411 case MCSA_ELF_TypeTLS: /// .type _foo, STT_TLS # aka @tls_object
412 case MCSA_ELF_TypeCommon: /// .type _foo, STT_COMMON # aka @common
413 case MCSA_ELF_TypeNoType: /// .type _foo, STT_NOTYPE # aka @notype
414 case MCSA_ELF_TypeGnuUniqueObject: /// .type _foo, @gnu_unique_object
415 if (!MAI->hasDotTypeDotSizeDirective())
416 return false; // Symbol attribute not supported
417 OS << "\t.type\t" << *Symbol << ','
418 << ((MAI->getCommentString()[0] != '@') ? '@' : '%');
419 switch (Attribute) {
420 default: return false;
421 case MCSA_ELF_TypeFunction: OS << "function"; break;
422 case MCSA_ELF_TypeIndFunction: OS << "gnu_indirect_function"; break;
423 case MCSA_ELF_TypeObject: OS << "object"; break;
424 case MCSA_ELF_TypeTLS: OS << "tls_object"; break;
425 case MCSA_ELF_TypeCommon: OS << "common"; break;
426 case MCSA_ELF_TypeNoType: OS << "no_type"; break;
427 case MCSA_ELF_TypeGnuUniqueObject: OS << "gnu_unique_object"; break;
428 }
429 EmitEOL();
430 return true;
431 case MCSA_Global: // .globl/.global
432 OS << MAI->getGlobalDirective();
433 break;
434 case MCSA_Hidden: OS << "\t.hidden\t"; break;
435 case MCSA_IndirectSymbol: OS << "\t.indirect_symbol\t"; break;
436 case MCSA_Internal: OS << "\t.internal\t"; break;
437 case MCSA_LazyReference: OS << "\t.lazy_reference\t"; break;
438 case MCSA_Local: OS << "\t.local\t"; break;
439 case MCSA_NoDeadStrip: OS << "\t.no_dead_strip\t"; break;
440 case MCSA_SymbolResolver: OS << "\t.symbol_resolver\t"; break;
441 case MCSA_PrivateExtern:
442 OS << "\t.private_extern\t";
443 break;
444 case MCSA_Protected: OS << "\t.protected\t"; break;
445 case MCSA_Reference: OS << "\t.reference\t"; break;
446 case MCSA_Weak: OS << MAI->getWeakDirective(); break;
447 case MCSA_WeakDefinition:
448 OS << "\t.weak_definition\t";
449 break;
450 // .weak_reference
451 case MCSA_WeakReference: OS << MAI->getWeakRefDirective(); break;
452 case MCSA_WeakDefAutoPrivate: OS << "\t.weak_def_can_be_hidden\t"; break;
453 }
454
455 OS << *Symbol;
456 EmitEOL();
457
458 return true;
459}
460
461void MCAsmStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
462 OS << ".desc" << ' ' << *Symbol << ',' << DescValue;
463 EmitEOL();
464}
465
466void MCAsmStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {
467 OS << "\t.def\t " << *Symbol << ';';
468 EmitEOL();
469}
470
471void MCAsmStreamer::EmitCOFFSymbolStorageClass (int StorageClass) {
472 OS << "\t.scl\t" << StorageClass << ';';
473 EmitEOL();
474}
475
476void MCAsmStreamer::EmitCOFFSymbolType (int Type) {
477 OS << "\t.type\t" << Type << ';';
478 EmitEOL();
479}
480
481void MCAsmStreamer::EndCOFFSymbolDef() {
482 OS << "\t.endef";
483 EmitEOL();
484}
485
486void MCAsmStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
487 OS << "\t.secidx\t" << *Symbol;
488 EmitEOL();
489}
490
491void MCAsmStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
492 OS << "\t.secrel32\t" << *Symbol;
493 EmitEOL();
494}
495
496void MCAsmStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {
497 assert(MAI->hasDotTypeDotSizeDirective())((MAI->hasDotTypeDotSizeDirective()) ? static_cast<void
> (0) : __assert_fail ("MAI->hasDotTypeDotSizeDirective()"
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 497, __PRETTY_FUNCTION__))
;
498 OS << "\t.size\t" << *Symbol << ", " << *Value << '\n';
499}
500
501void MCAsmStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
502 unsigned ByteAlignment) {
503 // Common symbols do not belong to any actual section.
504 AssignSection(Symbol, nullptr);
505
506 OS << "\t.comm\t" << *Symbol << ',' << Size;
507 if (ByteAlignment != 0) {
508 if (MAI->getCOMMDirectiveAlignmentIsInBytes())
509 OS << ',' << ByteAlignment;
510 else
511 OS << ',' << Log2_32(ByteAlignment);
512 }
513 EmitEOL();
514}
515
516/// EmitLocalCommonSymbol - Emit a local common (.lcomm) symbol.
517///
518/// @param Symbol - The common symbol to emit.
519/// @param Size - The size of the common symbol.
520void MCAsmStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
521 unsigned ByteAlign) {
522 // Common symbols do not belong to any actual section.
523 AssignSection(Symbol, nullptr);
524
525 OS << "\t.lcomm\t" << *Symbol << ',' << Size;
526 if (ByteAlign > 1) {
527 switch (MAI->getLCOMMDirectiveAlignmentType()) {
528 case LCOMM::NoAlignment:
529 llvm_unreachable("alignment not supported on .lcomm!")::llvm::llvm_unreachable_internal("alignment not supported on .lcomm!"
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 529)
;
530 case LCOMM::ByteAlignment:
531 OS << ',' << ByteAlign;
532 break;
533 case LCOMM::Log2Alignment:
534 assert(isPowerOf2_32(ByteAlign) && "alignment must be a power of 2")((isPowerOf2_32(ByteAlign) && "alignment must be a power of 2"
) ? static_cast<void> (0) : __assert_fail ("isPowerOf2_32(ByteAlign) && \"alignment must be a power of 2\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 534, __PRETTY_FUNCTION__))
;
535 OS << ',' << Log2_32(ByteAlign);
536 break;
537 }
538 }
539 EmitEOL();
540}
541
542void MCAsmStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
543 uint64_t Size, unsigned ByteAlignment) {
544 if (Symbol)
545 AssignSection(Symbol, Section);
546
547 // Note: a .zerofill directive does not switch sections.
548 OS << ".zerofill ";
549
550 // This is a mach-o specific directive.
551 const MCSectionMachO *MOSection = ((const MCSectionMachO*)Section);
552 OS << MOSection->getSegmentName() << "," << MOSection->getSectionName();
553
554 if (Symbol) {
555 OS << ',' << *Symbol << ',' << Size;
556 if (ByteAlignment != 0)
557 OS << ',' << Log2_32(ByteAlignment);
558 }
559 EmitEOL();
560}
561
562// .tbss sym, size, align
563// This depends that the symbol has already been mangled from the original,
564// e.g. _a.
565void MCAsmStreamer::EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
566 uint64_t Size, unsigned ByteAlignment) {
567 AssignSection(Symbol, Section);
568
569 assert(Symbol && "Symbol shouldn't be NULL!")((Symbol && "Symbol shouldn't be NULL!") ? static_cast
<void> (0) : __assert_fail ("Symbol && \"Symbol shouldn't be NULL!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 569, __PRETTY_FUNCTION__))
;
570 // Instead of using the Section we'll just use the shortcut.
571 // This is a mach-o specific directive and section.
572 OS << ".tbss " << *Symbol << ", " << Size;
573
574 // Output align if we have it. We default to 1 so don't bother printing
575 // that.
576 if (ByteAlignment > 1) OS << ", " << Log2_32(ByteAlignment);
577
578 EmitEOL();
579}
580
581static inline char toOctal(int X) { return (X&7)+'0'; }
582
583static void PrintQuotedString(StringRef Data, raw_ostream &OS) {
584 OS << '"';
585
586 for (unsigned i = 0, e = Data.size(); i != e; ++i) {
587 unsigned char C = Data[i];
588 if (C == '"' || C == '\\') {
589 OS << '\\' << (char)C;
590 continue;
591 }
592
593 if (isprint((unsigned char)C)) {
594 OS << (char)C;
595 continue;
596 }
597
598 switch (C) {
599 case '\b': OS << "\\b"; break;
600 case '\f': OS << "\\f"; break;
601 case '\n': OS << "\\n"; break;
602 case '\r': OS << "\\r"; break;
603 case '\t': OS << "\\t"; break;
604 default:
605 OS << '\\';
606 OS << toOctal(C >> 6);
607 OS << toOctal(C >> 3);
608 OS << toOctal(C >> 0);
609 break;
610 }
611 }
612
613 OS << '"';
614}
615
616
617void MCAsmStreamer::EmitBytes(StringRef Data) {
618 assert(getCurrentSection().first &&((getCurrentSection().first && "Cannot emit contents before setting section!"
) ? static_cast<void> (0) : __assert_fail ("getCurrentSection().first && \"Cannot emit contents before setting section!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 619, __PRETTY_FUNCTION__))
619 "Cannot emit contents before setting section!")((getCurrentSection().first && "Cannot emit contents before setting section!"
) ? static_cast<void> (0) : __assert_fail ("getCurrentSection().first && \"Cannot emit contents before setting section!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 619, __PRETTY_FUNCTION__))
;
620 if (Data.empty()) return;
621
622 if (Data.size() == 1) {
623 OS << MAI->getData8bitsDirective();
624 OS << (unsigned)(unsigned char)Data[0];
625 EmitEOL();
626 return;
627 }
628
629 // If the data ends with 0 and the target supports .asciz, use it, otherwise
630 // use .ascii
631 if (MAI->getAscizDirective() && Data.back() == 0) {
632 OS << MAI->getAscizDirective();
633 Data = Data.substr(0, Data.size()-1);
634 } else {
635 OS << MAI->getAsciiDirective();
636 }
637
638 PrintQuotedString(Data, OS);
639 EmitEOL();
640}
641
642void MCAsmStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
643 EmitValue(MCConstantExpr::Create(Value, getContext()), Size);
644}
645
646void MCAsmStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
647 const SMLoc &Loc) {
648 assert(Size <= 8 && "Invalid size")((Size <= 8 && "Invalid size") ? static_cast<void
> (0) : __assert_fail ("Size <= 8 && \"Invalid size\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 648, __PRETTY_FUNCTION__))
;
649 assert(getCurrentSection().first &&((getCurrentSection().first && "Cannot emit contents before setting section!"
) ? static_cast<void> (0) : __assert_fail ("getCurrentSection().first && \"Cannot emit contents before setting section!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 650, __PRETTY_FUNCTION__))
650 "Cannot emit contents before setting section!")((getCurrentSection().first && "Cannot emit contents before setting section!"
) ? static_cast<void> (0) : __assert_fail ("getCurrentSection().first && \"Cannot emit contents before setting section!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 650, __PRETTY_FUNCTION__))
;
651 const char *Directive = nullptr;
652 switch (Size) {
1
Control jumps to the 'default' case at line 653
653 default: break;
2
Execution continues on line 660
654 case 1: Directive = MAI->getData8bitsDirective(); break;
655 case 2: Directive = MAI->getData16bitsDirective(); break;
656 case 4: Directive = MAI->getData32bitsDirective(); break;
657 case 8: Directive = MAI->getData64bitsDirective(); break;
658 }
659
660 if (!Directive) {
3
Taking true branch
661 int64_t IntValue;
662 if (!Value->EvaluateAsAbsolute(IntValue))
4
Taking false branch
663 report_fatal_error("Don't know how to emit this value.");
664
665 // We couldn't handle the requested integer size so we fallback by breaking
666 // the request down into several, smaller, integers. Since sizes greater
667 // than eight are invalid and size equivalent to eight should have been
668 // handled earlier, we use four bytes as our largest piece of granularity.
669 bool IsLittleEndian = MAI->isLittleEndian();
670 for (unsigned Emitted = 0; Emitted != Size;) {
5
Assuming 'Emitted' is not equal to 'Size'
6
Loop condition is true. Entering loop body
11
Loop condition is true. Entering loop body
671 unsigned Remaining = Size - Emitted;
672 // The size of our partial emission must be a power of two less than
673 // eight.
674 unsigned EmissionSize = PowerOf2Floor(Remaining);
675 if (EmissionSize > 4)
7
Assuming 'EmissionSize' is <= 4
8
Taking false branch
12
Taking false branch
676 EmissionSize = 4;
677 // Calculate the byte offset of our partial emission taking into account
678 // the endianness of the target.
679 unsigned ByteOffset =
680 IsLittleEndian ? Emitted : (Remaining - EmissionSize);
9
Assuming 'IsLittleEndian' is not equal to 0
10
'?' condition is true
13
'?' condition is true
681 uint64_t ValueToEmit = IntValue >> (ByteOffset * 8);
682 // We truncate our partial emission to fit within the bounds of the
683 // emission domain. This produces nicer output and silences potential
684 // truncation warnings when round tripping through another assembler.
685 ValueToEmit &= ~0ULL >> (64 - EmissionSize * 8);
14
The result of the '>>' expression is undefined
686 EmitIntValue(ValueToEmit, EmissionSize);
687 Emitted += EmissionSize;
688 }
689 return;
690 }
691
692 assert(Directive && "Invalid size for machine code value!")((Directive && "Invalid size for machine code value!"
) ? static_cast<void> (0) : __assert_fail ("Directive && \"Invalid size for machine code value!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 692, __PRETTY_FUNCTION__))
;
693 OS << Directive << *Value;
694 EmitEOL();
695}
696
697void MCAsmStreamer::EmitULEB128Value(const MCExpr *Value) {
698 int64_t IntValue;
699 if (Value->EvaluateAsAbsolute(IntValue)) {
700 EmitULEB128IntValue(IntValue);
701 return;
702 }
703 OS << ".uleb128 " << *Value;
704 EmitEOL();
705}
706
707void MCAsmStreamer::EmitSLEB128Value(const MCExpr *Value) {
708 int64_t IntValue;
709 if (Value->EvaluateAsAbsolute(IntValue)) {
710 EmitSLEB128IntValue(IntValue);
711 return;
712 }
713 OS << ".sleb128 " << *Value;
714 EmitEOL();
715}
716
717void MCAsmStreamer::EmitGPRel64Value(const MCExpr *Value) {
718 assert(MAI->getGPRel64Directive() != nullptr)((MAI->getGPRel64Directive() != nullptr) ? static_cast<
void> (0) : __assert_fail ("MAI->getGPRel64Directive() != nullptr"
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 718, __PRETTY_FUNCTION__))
;
719 OS << MAI->getGPRel64Directive() << *Value;
720 EmitEOL();
721}
722
723void MCAsmStreamer::EmitGPRel32Value(const MCExpr *Value) {
724 assert(MAI->getGPRel32Directive() != nullptr)((MAI->getGPRel32Directive() != nullptr) ? static_cast<
void> (0) : __assert_fail ("MAI->getGPRel32Directive() != nullptr"
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 724, __PRETTY_FUNCTION__))
;
725 OS << MAI->getGPRel32Directive() << *Value;
726 EmitEOL();
727}
728
729
730/// EmitFill - Emit NumBytes bytes worth of the value specified by
731/// FillValue. This implements directives such as '.space'.
732void MCAsmStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
733 if (NumBytes == 0) return;
734
735 if (const char *ZeroDirective = MAI->getZeroDirective()) {
736 OS << ZeroDirective << NumBytes;
737 if (FillValue != 0)
738 OS << ',' << (int)FillValue;
739 EmitEOL();
740 return;
741 }
742
743 // Emit a byte at a time.
744 MCStreamer::EmitFill(NumBytes, FillValue);
745}
746
747void MCAsmStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
748 unsigned ValueSize,
749 unsigned MaxBytesToEmit) {
750 // Some assemblers don't support non-power of two alignments, so we always
751 // emit alignments as a power of two if possible.
752 if (isPowerOf2_32(ByteAlignment)) {
753 switch (ValueSize) {
754 default:
755 llvm_unreachable("Invalid size for machine code value!")::llvm::llvm_unreachable_internal("Invalid size for machine code value!"
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 755)
;
756 case 1:
757 OS << "\t.align\t";
758 break;
759 case 2:
760 OS << ".p2alignw ";
761 break;
762 case 4:
763 OS << ".p2alignl ";
764 break;
765 case 8:
766 llvm_unreachable("Unsupported alignment size!")::llvm::llvm_unreachable_internal("Unsupported alignment size!"
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 766)
;
767 }
768
769 if (MAI->getAlignmentIsInBytes())
770 OS << ByteAlignment;
771 else
772 OS << Log2_32(ByteAlignment);
773
774 if (Value || MaxBytesToEmit) {
775 OS << ", 0x";
776 OS.write_hex(truncateToSize(Value, ValueSize));
777
778 if (MaxBytesToEmit)
779 OS << ", " << MaxBytesToEmit;
780 }
781 EmitEOL();
782 return;
783 }
784
785 // Non-power of two alignment. This is not widely supported by assemblers.
786 // FIXME: Parameterize this based on MAI.
787 switch (ValueSize) {
788 default: llvm_unreachable("Invalid size for machine code value!")::llvm::llvm_unreachable_internal("Invalid size for machine code value!"
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 788)
;
789 case 1: OS << ".balign"; break;
790 case 2: OS << ".balignw"; break;
791 case 4: OS << ".balignl"; break;
792 case 8: llvm_unreachable("Unsupported alignment size!")::llvm::llvm_unreachable_internal("Unsupported alignment size!"
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 792)
;
793 }
794
795 OS << ' ' << ByteAlignment;
796 OS << ", " << truncateToSize(Value, ValueSize);
797 if (MaxBytesToEmit)
798 OS << ", " << MaxBytesToEmit;
799 EmitEOL();
800}
801
802void MCAsmStreamer::EmitCodeAlignment(unsigned ByteAlignment,
803 unsigned MaxBytesToEmit) {
804 // Emit with a text fill value.
805 EmitValueToAlignment(ByteAlignment, MAI->getTextAlignFillValue(),
806 1, MaxBytesToEmit);
807}
808
809bool MCAsmStreamer::EmitValueToOffset(const MCExpr *Offset,
810 unsigned char Value) {
811 // FIXME: Verify that Offset is associated with the current section.
812 OS << ".org " << *Offset << ", " << (unsigned) Value;
813 EmitEOL();
814 return false;
815}
816
817
818void MCAsmStreamer::EmitFileDirective(StringRef Filename) {
819 assert(MAI->hasSingleParameterDotFile())((MAI->hasSingleParameterDotFile()) ? static_cast<void>
(0) : __assert_fail ("MAI->hasSingleParameterDotFile()", "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 819, __PRETTY_FUNCTION__))
;
820 OS << "\t.file\t";
821 PrintQuotedString(Filename, OS);
822 EmitEOL();
823}
824
825unsigned MCAsmStreamer::EmitDwarfFileDirective(unsigned FileNo,
826 StringRef Directory,
827 StringRef Filename,
828 unsigned CUID) {
829 assert(CUID == 0)((CUID == 0) ? static_cast<void> (0) : __assert_fail ("CUID == 0"
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 829, __PRETTY_FUNCTION__))
;
830
831 MCDwarfLineTable &Table = getContext().getMCDwarfLineTable(CUID);
832 unsigned NumFiles = Table.getMCDwarfFiles().size();
833 FileNo = Table.getFile(Directory, Filename, FileNo);
834 if (FileNo == 0)
835 return 0;
836 if (NumFiles == Table.getMCDwarfFiles().size())
837 return FileNo;
838
839 SmallString<128> FullPathName;
840
841 if (!UseDwarfDirectory && !Directory.empty()) {
842 if (sys::path::is_absolute(Filename))
843 Directory = "";
844 else {
845 FullPathName = Directory;
846 sys::path::append(FullPathName, Filename);
847 Directory = "";
848 Filename = FullPathName;
849 }
850 }
851
852 OS << "\t.file\t" << FileNo << ' ';
853 if (!Directory.empty()) {
854 PrintQuotedString(Directory, OS);
855 OS << ' ';
856 }
857 PrintQuotedString(Filename, OS);
858 EmitEOL();
859
860 return FileNo;
861}
862
863void MCAsmStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
864 unsigned Column, unsigned Flags,
865 unsigned Isa,
866 unsigned Discriminator,
867 StringRef FileName) {
868 this->MCStreamer::EmitDwarfLocDirective(FileNo, Line, Column, Flags,
869 Isa, Discriminator, FileName);
870 OS << "\t.loc\t" << FileNo << " " << Line << " " << Column;
871 if (Flags & DWARF2_FLAG_BASIC_BLOCK(1 << 1))
872 OS << " basic_block";
873 if (Flags & DWARF2_FLAG_PROLOGUE_END(1 << 2))
874 OS << " prologue_end";
875 if (Flags & DWARF2_FLAG_EPILOGUE_BEGIN(1 << 3))
876 OS << " epilogue_begin";
877
878 unsigned OldFlags = getContext().getCurrentDwarfLoc().getFlags();
879 if ((Flags & DWARF2_FLAG_IS_STMT(1 << 0)) != (OldFlags & DWARF2_FLAG_IS_STMT(1 << 0))) {
880 OS << " is_stmt ";
881
882 if (Flags & DWARF2_FLAG_IS_STMT(1 << 0))
883 OS << "1";
884 else
885 OS << "0";
886 }
887
888 if (Isa)
889 OS << " isa " << Isa;
890 if (Discriminator)
891 OS << " discriminator " << Discriminator;
892
893 if (IsVerboseAsm) {
894 OS.PadToColumn(MAI->getCommentColumn());
895 OS << MAI->getCommentString() << ' ' << FileName << ':'
896 << Line << ':' << Column;
897 }
898 EmitEOL();
899}
900
901MCSymbol *MCAsmStreamer::getDwarfLineTableSymbol(unsigned CUID) {
902 // Always use the zeroth line table, since asm syntax only supports one line
903 // table for now.
904 return MCStreamer::getDwarfLineTableSymbol(0);
905}
906
907void MCAsmStreamer::EmitIdent(StringRef IdentString) {
908 assert(MAI->hasIdentDirective() && ".ident directive not supported")((MAI->hasIdentDirective() && ".ident directive not supported"
) ? static_cast<void> (0) : __assert_fail ("MAI->hasIdentDirective() && \".ident directive not supported\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 908, __PRETTY_FUNCTION__))
;
909 OS << "\t.ident\t";
910 PrintQuotedString(IdentString, OS);
911 EmitEOL();
912}
913
914void MCAsmStreamer::EmitCFISections(bool EH, bool Debug) {
915 MCStreamer::EmitCFISections(EH, Debug);
916 OS << "\t.cfi_sections ";
917 if (EH) {
918 OS << ".eh_frame";
919 if (Debug)
920 OS << ", .debug_frame";
921 } else if (Debug) {
922 OS << ".debug_frame";
923 }
924
925 EmitEOL();
926}
927
928void MCAsmStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
929 OS << "\t.cfi_startproc";
930 if (Frame.IsSimple)
931 OS << " simple";
932 EmitEOL();
933}
934
935void MCAsmStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
936 MCStreamer::EmitCFIEndProcImpl(Frame);
937 OS << "\t.cfi_endproc";
938 EmitEOL();
939}
940
941void MCAsmStreamer::EmitRegisterName(int64_t Register) {
942 if (InstPrinter && !MAI->useDwarfRegNumForCFI()) {
943 const MCRegisterInfo *MRI = getContext().getRegisterInfo();
944 unsigned LLVMRegister = MRI->getLLVMRegNum(Register, true);
945 InstPrinter->printRegName(OS, LLVMRegister);
946 } else {
947 OS << Register;
948 }
949}
950
951void MCAsmStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
952 MCStreamer::EmitCFIDefCfa(Register, Offset);
953 OS << "\t.cfi_def_cfa ";
954 EmitRegisterName(Register);
955 OS << ", " << Offset;
956 EmitEOL();
957}
958
959void MCAsmStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
960 MCStreamer::EmitCFIDefCfaOffset(Offset);
961 OS << "\t.cfi_def_cfa_offset " << Offset;
962 EmitEOL();
963}
964
965void MCAsmStreamer::EmitCFIDefCfaRegister(int64_t Register) {
966 MCStreamer::EmitCFIDefCfaRegister(Register);
967 OS << "\t.cfi_def_cfa_register ";
968 EmitRegisterName(Register);
969 EmitEOL();
970}
971
972void MCAsmStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
973 this->MCStreamer::EmitCFIOffset(Register, Offset);
974 OS << "\t.cfi_offset ";
975 EmitRegisterName(Register);
976 OS << ", " << Offset;
977 EmitEOL();
978}
979
980void MCAsmStreamer::EmitCFIPersonality(const MCSymbol *Sym,
981 unsigned Encoding) {
982 MCStreamer::EmitCFIPersonality(Sym, Encoding);
983 OS << "\t.cfi_personality " << Encoding << ", " << *Sym;
984 EmitEOL();
985}
986
987void MCAsmStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
988 MCStreamer::EmitCFILsda(Sym, Encoding);
989 OS << "\t.cfi_lsda " << Encoding << ", " << *Sym;
990 EmitEOL();
991}
992
993void MCAsmStreamer::EmitCFIRememberState() {
994 MCStreamer::EmitCFIRememberState();
995 OS << "\t.cfi_remember_state";
996 EmitEOL();
997}
998
999void MCAsmStreamer::EmitCFIRestoreState() {
1000 MCStreamer::EmitCFIRestoreState();
1001 OS << "\t.cfi_restore_state";
1002 EmitEOL();
1003}
1004
1005void MCAsmStreamer::EmitCFISameValue(int64_t Register) {
1006 MCStreamer::EmitCFISameValue(Register);
1007 OS << "\t.cfi_same_value ";
1008 EmitRegisterName(Register);
1009 EmitEOL();
1010}
1011
1012void MCAsmStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
1013 MCStreamer::EmitCFIRelOffset(Register, Offset);
1014 OS << "\t.cfi_rel_offset ";
1015 EmitRegisterName(Register);
1016 OS << ", " << Offset;
1017 EmitEOL();
1018}
1019
1020void MCAsmStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
1021 MCStreamer::EmitCFIAdjustCfaOffset(Adjustment);
1022 OS << "\t.cfi_adjust_cfa_offset " << Adjustment;
1023 EmitEOL();
1024}
1025
1026void MCAsmStreamer::EmitCFISignalFrame() {
1027 MCStreamer::EmitCFISignalFrame();
1028 OS << "\t.cfi_signal_frame";
1029 EmitEOL();
1030}
1031
1032void MCAsmStreamer::EmitCFIUndefined(int64_t Register) {
1033 MCStreamer::EmitCFIUndefined(Register);
1034 OS << "\t.cfi_undefined " << Register;
1035 EmitEOL();
1036}
1037
1038void MCAsmStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
1039 MCStreamer::EmitCFIRegister(Register1, Register2);
1040 OS << "\t.cfi_register " << Register1 << ", " << Register2;
1041 EmitEOL();
1042}
1043
1044void MCAsmStreamer::EmitCFIWindowSave() {
1045 MCStreamer::EmitCFIWindowSave();
1046 OS << "\t.cfi_window_save";
1047 EmitEOL();
1048}
1049
1050void MCAsmStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol) {
1051 MCStreamer::EmitWinCFIStartProc(Symbol);
1052
1053 OS << ".seh_proc " << *Symbol;
1054 EmitEOL();
1055}
1056
1057void MCAsmStreamer::EmitWinCFIEndProc() {
1058 MCStreamer::EmitWinCFIEndProc();
1059
1060 OS << "\t.seh_endproc";
1061 EmitEOL();
1062}
1063
1064void MCAsmStreamer::EmitWinCFIStartChained() {
1065 MCStreamer::EmitWinCFIStartChained();
1066
1067 OS << "\t.seh_startchained";
1068 EmitEOL();
1069}
1070
1071void MCAsmStreamer::EmitWinCFIEndChained() {
1072 MCStreamer::EmitWinCFIEndChained();
1073
1074 OS << "\t.seh_endchained";
1075 EmitEOL();
1076}
1077
1078void MCAsmStreamer::EmitWinEHHandler(const MCSymbol *Sym, bool Unwind,
1079 bool Except) {
1080 MCStreamer::EmitWinEHHandler(Sym, Unwind, Except);
1081
1082 OS << "\t.seh_handler " << *Sym;
1083 if (Unwind)
1084 OS << ", @unwind";
1085 if (Except)
1086 OS << ", @except";
1087 EmitEOL();
1088}
1089
1090void MCAsmStreamer::EmitWinEHHandlerData() {
1091 MCStreamer::EmitWinEHHandlerData();
1092
1093 // Switch sections. Don't call SwitchSection directly, because that will
1094 // cause the section switch to be visible in the emitted assembly.
1095 // We only do this so the section switch that terminates the handler
1096 // data block is visible.
1097 WinEH::FrameInfo *CurFrame = getCurrentWinFrameInfo();
1098 if (const MCSection *XData = WinEH::UnwindEmitter::getXDataSection(
1099 CurFrame->Function, getContext()))
1100 SwitchSectionNoChange(XData);
1101
1102 OS << "\t.seh_handlerdata";
1103 EmitEOL();
1104}
1105
1106void MCAsmStreamer::EmitWinCFIPushReg(unsigned Register) {
1107 MCStreamer::EmitWinCFIPushReg(Register);
1108
1109 OS << "\t.seh_pushreg " << Register;
1110 EmitEOL();
1111}
1112
1113void MCAsmStreamer::EmitWinCFISetFrame(unsigned Register, unsigned Offset) {
1114 MCStreamer::EmitWinCFISetFrame(Register, Offset);
1115
1116 OS << "\t.seh_setframe " << Register << ", " << Offset;
1117 EmitEOL();
1118}
1119
1120void MCAsmStreamer::EmitWinCFIAllocStack(unsigned Size) {
1121 MCStreamer::EmitWinCFIAllocStack(Size);
1122
1123 OS << "\t.seh_stackalloc " << Size;
1124 EmitEOL();
1125}
1126
1127void MCAsmStreamer::EmitWinCFISaveReg(unsigned Register, unsigned Offset) {
1128 MCStreamer::EmitWinCFISaveReg(Register, Offset);
1129
1130 OS << "\t.seh_savereg " << Register << ", " << Offset;
1131 EmitEOL();
1132}
1133
1134void MCAsmStreamer::EmitWinCFISaveXMM(unsigned Register, unsigned Offset) {
1135 MCStreamer::EmitWinCFISaveXMM(Register, Offset);
1136
1137 OS << "\t.seh_savexmm " << Register << ", " << Offset;
1138 EmitEOL();
1139}
1140
1141void MCAsmStreamer::EmitWinCFIPushFrame(bool Code) {
1142 MCStreamer::EmitWinCFIPushFrame(Code);
1143
1144 OS << "\t.seh_pushframe";
1145 if (Code)
1146 OS << " @code";
1147 EmitEOL();
1148}
1149
1150void MCAsmStreamer::EmitWinCFIEndProlog(void) {
1151 MCStreamer::EmitWinCFIEndProlog();
1152
1153 OS << "\t.seh_endprologue";
1154 EmitEOL();
1155}
1156
1157void MCAsmStreamer::AddEncodingComment(const MCInst &Inst,
1158 const MCSubtargetInfo &STI) {
1159 raw_ostream &OS = GetCommentOS();
1160 SmallString<256> Code;
1161 SmallVector<MCFixup, 4> Fixups;
1162 raw_svector_ostream VecOS(Code);
1163 Emitter->EncodeInstruction(Inst, VecOS, Fixups, STI);
1164 VecOS.flush();
1165
1166 // If we are showing fixups, create symbolic markers in the encoded
1167 // representation. We do this by making a per-bit map to the fixup item index,
1168 // then trying to display it as nicely as possible.
1169 SmallVector<uint8_t, 64> FixupMap;
1170 FixupMap.resize(Code.size() * 8);
1171 for (unsigned i = 0, e = Code.size() * 8; i != e; ++i)
1172 FixupMap[i] = 0;
1173
1174 for (unsigned i = 0, e = Fixups.size(); i != e; ++i) {
1175 MCFixup &F = Fixups[i];
1176 const MCFixupKindInfo &Info = AsmBackend->getFixupKindInfo(F.getKind());
1177 for (unsigned j = 0; j != Info.TargetSize; ++j) {
1178 unsigned Index = F.getOffset() * 8 + Info.TargetOffset + j;
1179 assert(Index < Code.size() * 8 && "Invalid offset in fixup!")((Index < Code.size() * 8 && "Invalid offset in fixup!"
) ? static_cast<void> (0) : __assert_fail ("Index < Code.size() * 8 && \"Invalid offset in fixup!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 1179, __PRETTY_FUNCTION__))
;
1180 FixupMap[Index] = 1 + i;
1181 }
1182 }
1183
1184 // FIXME: Note the fixup comments for Thumb2 are completely bogus since the
1185 // high order halfword of a 32-bit Thumb2 instruction is emitted first.
1186 OS << "encoding: [";
1187 for (unsigned i = 0, e = Code.size(); i != e; ++i) {
1188 if (i)
1189 OS << ',';
1190
1191 // See if all bits are the same map entry.
1192 uint8_t MapEntry = FixupMap[i * 8 + 0];
1193 for (unsigned j = 1; j != 8; ++j) {
1194 if (FixupMap[i * 8 + j] == MapEntry)
1195 continue;
1196
1197 MapEntry = uint8_t(~0U);
1198 break;
1199 }
1200
1201 if (MapEntry != uint8_t(~0U)) {
1202 if (MapEntry == 0) {
1203 OS << format("0x%02x", uint8_t(Code[i]));
1204 } else {
1205 if (Code[i]) {
1206 // FIXME: Some of the 8 bits require fix up.
1207 OS << format("0x%02x", uint8_t(Code[i])) << '\''
1208 << char('A' + MapEntry - 1) << '\'';
1209 } else
1210 OS << char('A' + MapEntry - 1);
1211 }
1212 } else {
1213 // Otherwise, write out in binary.
1214 OS << "0b";
1215 for (unsigned j = 8; j--;) {
1216 unsigned Bit = (Code[i] >> j) & 1;
1217
1218 unsigned FixupBit;
1219 if (MAI->isLittleEndian())
1220 FixupBit = i * 8 + j;
1221 else
1222 FixupBit = i * 8 + (7-j);
1223
1224 if (uint8_t MapEntry = FixupMap[FixupBit]) {
1225 assert(Bit == 0 && "Encoder wrote into fixed up bit!")((Bit == 0 && "Encoder wrote into fixed up bit!") ? static_cast
<void> (0) : __assert_fail ("Bit == 0 && \"Encoder wrote into fixed up bit!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 1225, __PRETTY_FUNCTION__))
;
1226 OS << char('A' + MapEntry - 1);
1227 } else
1228 OS << Bit;
1229 }
1230 }
1231 }
1232 OS << "]\n";
1233
1234 for (unsigned i = 0, e = Fixups.size(); i != e; ++i) {
1235 MCFixup &F = Fixups[i];
1236 const MCFixupKindInfo &Info = AsmBackend->getFixupKindInfo(F.getKind());
1237 OS << " fixup " << char('A' + i) << " - " << "offset: " << F.getOffset()
1238 << ", value: " << *F.getValue() << ", kind: " << Info.Name << "\n";
1239 }
1240}
1241
1242void MCAsmStreamer::EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) {
1243 assert(getCurrentSection().first &&((getCurrentSection().first && "Cannot emit contents before setting section!"
) ? static_cast<void> (0) : __assert_fail ("getCurrentSection().first && \"Cannot emit contents before setting section!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 1244, __PRETTY_FUNCTION__))
1244 "Cannot emit contents before setting section!")((getCurrentSection().first && "Cannot emit contents before setting section!"
) ? static_cast<void> (0) : __assert_fail ("getCurrentSection().first && \"Cannot emit contents before setting section!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 1244, __PRETTY_FUNCTION__))
;
1245
1246 // Show the encoding in a comment if we have a code emitter.
1247 if (Emitter)
1248 AddEncodingComment(Inst, STI);
1249
1250 // Show the MCInst if enabled.
1251 if (ShowInst) {
1252 Inst.dump_pretty(GetCommentOS(), MAI, InstPrinter.get(), "\n ");
1253 GetCommentOS() << "\n";
1254 }
1255
1256 // If we have an AsmPrinter, use that to print, otherwise print the MCInst.
1257 if (InstPrinter)
1258 InstPrinter->printInst(&Inst, OS, "");
1259 else
1260 Inst.print(OS, MAI);
1261 EmitEOL();
1262}
1263
1264void MCAsmStreamer::EmitBundleAlignMode(unsigned AlignPow2) {
1265 OS << "\t.bundle_align_mode " << AlignPow2;
1266 EmitEOL();
1267}
1268
1269void MCAsmStreamer::EmitBundleLock(bool AlignToEnd) {
1270 OS << "\t.bundle_lock";
1271 if (AlignToEnd)
1272 OS << " align_to_end";
1273 EmitEOL();
1274}
1275
1276void MCAsmStreamer::EmitBundleUnlock() {
1277 OS << "\t.bundle_unlock";
1278 EmitEOL();
1279}
1280
1281/// EmitRawText - If this file is backed by an assembly streamer, this dumps
1282/// the specified string in the output .s file. This capability is
1283/// indicated by the hasRawTextSupport() predicate.
1284void MCAsmStreamer::EmitRawTextImpl(StringRef String) {
1285 if (!String.empty() && String.back() == '\n')
1286 String = String.substr(0, String.size()-1);
1287 OS << String;
1288 EmitEOL();
1289}
1290
1291void MCAsmStreamer::FinishImpl() {
1292 // If we are generating dwarf for assembly source files dump out the sections.
1293 if (getContext().getGenDwarfForAssembly())
1294 MCGenDwarfInfo::Emit(this);
1295
1296 // Emit the label for the line table, if requested - since the rest of the
1297 // line table will be defined by .loc/.file directives, and not emitted
1298 // directly, the label is the only work required here.
1299 auto &Tables = getContext().getMCDwarfLineTables();
1300 if (!Tables.empty()) {
1301 assert(Tables.size() == 1 && "asm output only supports one line table")((Tables.size() == 1 && "asm output only supports one line table"
) ? static_cast<void> (0) : __assert_fail ("Tables.size() == 1 && \"asm output only supports one line table\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn224007/lib/MC/MCAsmStreamer.cpp"
, 1301, __PRETTY_FUNCTION__))
;
1302 if (auto *Label = Tables.begin()->second.getLabel()) {
1303 SwitchSection(getContext().getObjectFileInfo()->getDwarfLineSection());
1304 EmitLabel(Label);
1305 }
1306 }
1307}
1308
1309MCStreamer *llvm::createAsmStreamer(MCContext &Context,
1310 formatted_raw_ostream &OS,
1311 bool isVerboseAsm, bool useDwarfDirectory,
1312 MCInstPrinter *IP, MCCodeEmitter *CE,
1313 MCAsmBackend *MAB, bool ShowInst) {
1314 return new MCAsmStreamer(Context, OS, isVerboseAsm, useDwarfDirectory, IP, CE,
1315 MAB, ShowInst);
1316}