MCStreamer.cpp revision 28c9ea3c13dfb8f6bb3226ba511d189135fcb140 
1//===- lib/MC/MCStreamer.cpp - Streaming Machine Code 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/MCAsmInfo.h"
11#include "llvm/MC/MCContext.h"
12#include "llvm/MC/MCStreamer.h"
13#include "llvm/MC/MCExpr.h"
14#include "llvm/MC/MCObjectWriter.h"
15#include "llvm/MC/MCSymbol.h"
16#include "llvm/Support/ErrorHandling.h"
17#include "llvm/Support/raw_ostream.h"
18#include "llvm/Support/LEB128.h"
19#include "llvm/ADT/SmallString.h"
20#include "llvm/ADT/Twine.h"
21#include <cstdlib>
22using namespace llvm;
23
24MCStreamer::MCStreamer(MCContext &Ctx)
25  : Context(Ctx), EmitEHFrame(true), EmitDebugFrame(false),
26    CurrentW64UnwindInfo(0), LastSymbol(0) {
27  const MCSection *section = NULL;
28  SectionStack.push_back(std::make_pair(section, section));
29}
30
31MCStreamer::~MCStreamer() {
32  for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
33    delete W64UnwindInfos[i];
34}
35
36const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
37                                          const MCSymbol *A,
38                                          const MCSymbol *B) {
39  MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
40  const MCExpr *ARef =
41    MCSymbolRefExpr::Create(A, Variant, Context);
42  const MCExpr *BRef =
43    MCSymbolRefExpr::Create(B, Variant, Context);
44  const MCExpr *AddrDelta =
45    MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context);
46  return AddrDelta;
47}
48
49const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) {
50  if (Context.getAsmInfo().hasAggressiveSymbolFolding() ||
51      isa<MCSymbolRefExpr>(Expr))
52    return Expr;
53
54  MCSymbol *ABS = Context.CreateTempSymbol();
55  EmitAssignment(ABS, Expr);
56  return MCSymbolRefExpr::Create(ABS, Context);
57}
58
59raw_ostream &MCStreamer::GetCommentOS() {
60  // By default, discard comments.
61  return nulls();
62}
63
64void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta,
65                                      const MCSymbol *Label, int PointerSize) {
66  // emit the sequence to set the address
67  EmitIntValue(dwarf::DW_LNS_extended_op, 1);
68  EmitULEB128IntValue(PointerSize + 1);
69  EmitIntValue(dwarf::DW_LNE_set_address, 1);
70  EmitSymbolValue(Label, PointerSize);
71
72  // emit the sequence for the LineDelta (from 1) and a zero address delta.
73  MCDwarfLineAddr::Emit(this, LineDelta, 0);
74}
75
76/// EmitIntValue - Special case of EmitValue that avoids the client having to
77/// pass in a MCExpr for constant integers.
78void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size,
79                              unsigned AddrSpace) {
80  assert(Size <= 8 && "Invalid size");
81  assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
82         "Invalid size");
83  char buf[8];
84  const bool isLittleEndian = Context.getAsmInfo().isLittleEndian();
85  for (unsigned i = 0; i != Size; ++i) {
86    unsigned index = isLittleEndian ? i : (Size - i - 1);
87    buf[i] = uint8_t(Value >> (index * 8));
88  }
89  EmitBytes(StringRef(buf, Size), AddrSpace);
90}
91
92/// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
93/// client having to pass in a MCExpr for constant integers.
94void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned AddrSpace,
95                                     unsigned Padding) {
96  SmallString<128> Tmp;
97  raw_svector_ostream OSE(Tmp);
98  encodeULEB128(Value, OSE, Padding);
99  EmitBytes(OSE.str(), AddrSpace);
100}
101
102/// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
103/// client having to pass in a MCExpr for constant integers.
104void MCStreamer::EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace) {
105  SmallString<128> Tmp;
106  raw_svector_ostream OSE(Tmp);
107  encodeSLEB128(Value, OSE);
108  EmitBytes(OSE.str(), AddrSpace);
109}
110
111void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size,
112                              unsigned AddrSpace) {
113  const MCExpr *ABS = ForceExpAbs(Value);
114  EmitValue(ABS, Size, AddrSpace);
115}
116
117
118void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size,
119                           unsigned AddrSpace) {
120  EmitValueImpl(Value, Size, AddrSpace);
121}
122
123void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
124                                  unsigned AddrSpace) {
125  EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size,
126                AddrSpace);
127}
128
129void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
130  report_fatal_error("unsupported directive in streamer");
131}
132
133void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
134  report_fatal_error("unsupported directive in streamer");
135}
136
137/// EmitFill - Emit NumBytes bytes worth of the value specified by
138/// FillValue.  This implements directives such as '.space'.
139void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
140                          unsigned AddrSpace) {
141  const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
142  for (uint64_t i = 0, e = NumBytes; i != e; ++i)
143    EmitValue(E, 1, AddrSpace);
144}
145
146bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
147                                        StringRef Directory,
148                                        StringRef Filename) {
149  return getContext().GetDwarfFile(Directory, Filename, FileNo) == 0;
150}
151
152void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
153                                       unsigned Column, unsigned Flags,
154                                       unsigned Isa,
155                                       unsigned Discriminator,
156                                       StringRef FileName) {
157  getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
158                                  Discriminator);
159}
160
161MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
162  if (FrameInfos.empty())
163    return NULL;
164  return &FrameInfos.back();
165}
166
167void MCStreamer::EnsureValidFrame() {
168  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
169  if (!CurFrame || CurFrame->End)
170    report_fatal_error("No open frame");
171}
172
173void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
174                                     MCSymbol *EHSymbol) {
175}
176
177void MCStreamer::EmitLabel(MCSymbol *Symbol) {
178  assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
179  assert(getCurrentSection() && "Cannot emit before setting section!");
180  Symbol->setSection(*getCurrentSection());
181  LastSymbol = Symbol;
182}
183
184void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
185  EnsureValidFrame();
186  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
187  CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
188}
189
190void MCStreamer::EmitCFISections(bool EH, bool Debug) {
191  assert(EH || Debug);
192  EmitEHFrame = EH;
193  EmitDebugFrame = Debug;
194}
195
196void MCStreamer::EmitCFIStartProc() {
197  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
198  if (CurFrame && !CurFrame->End)
199    report_fatal_error("Starting a frame before finishing the previous one!");
200
201  MCDwarfFrameInfo Frame;
202  EmitCFIStartProcImpl(Frame);
203
204  FrameInfos.push_back(Frame);
205}
206
207void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
208}
209
210void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
211  Frame.Function = LastSymbol;
212  // If the function is externally visible, we need to create a local
213  // symbol to avoid relocations.
214  StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix();
215  if (LastSymbol && LastSymbol->getName().startswith(Prefix)) {
216    Frame.Begin = LastSymbol;
217  } else {
218    Frame.Begin = getContext().CreateTempSymbol();
219    EmitLabel(Frame.Begin);
220  }
221}
222
223void MCStreamer::EmitCFIEndProc() {
224  EnsureValidFrame();
225  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
226  EmitCFIEndProcImpl(*CurFrame);
227}
228
229void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
230}
231
232void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
233  Frame.End = getContext().CreateTempSymbol();
234  EmitLabel(Frame.End);
235}
236
237void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
238  EnsureValidFrame();
239  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
240  MCSymbol *Label = getContext().CreateTempSymbol();
241  EmitLabel(Label);
242  MCCFIInstruction Instruction =
243    MCCFIInstruction::createDefCfa(Label, Register, Offset);
244  CurFrame->Instructions.push_back(Instruction);
245}
246
247void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
248  EnsureValidFrame();
249  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
250  MCSymbol *Label = getContext().CreateTempSymbol();
251  EmitLabel(Label);
252  MCCFIInstruction Instruction =
253    MCCFIInstruction::createDefCfaOffset(Label, Offset);
254  CurFrame->Instructions.push_back(Instruction);
255}
256
257void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
258  EnsureValidFrame();
259  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
260  MCSymbol *Label = getContext().CreateTempSymbol();
261  EmitLabel(Label);
262  MCCFIInstruction Instruction =
263    MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
264  CurFrame->Instructions.push_back(Instruction);
265}
266
267void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
268  EnsureValidFrame();
269  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
270  MCSymbol *Label = getContext().CreateTempSymbol();
271  EmitLabel(Label);
272  MCCFIInstruction Instruction =
273    MCCFIInstruction::createDefCfaRegister(Label, Register);
274  CurFrame->Instructions.push_back(Instruction);
275}
276
277void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
278  EnsureValidFrame();
279  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
280  MCSymbol *Label = getContext().CreateTempSymbol();
281  EmitLabel(Label);
282  MCCFIInstruction Instruction =
283    MCCFIInstruction::createCFIOffset(Label, Register, Offset);
284  CurFrame->Instructions.push_back(Instruction);
285}
286
287void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
288  EnsureValidFrame();
289  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
290  MCSymbol *Label = getContext().CreateTempSymbol();
291  EmitLabel(Label);
292  MCCFIInstruction Instruction =
293    MCCFIInstruction::createRelOffset(Label, Register, Offset);
294  CurFrame->Instructions.push_back(Instruction);
295}
296
297void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
298                                    unsigned Encoding) {
299  EnsureValidFrame();
300  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
301  CurFrame->Personality = Sym;
302  CurFrame->PersonalityEncoding = Encoding;
303}
304
305void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
306  EnsureValidFrame();
307  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
308  CurFrame->Lsda = Sym;
309  CurFrame->LsdaEncoding = Encoding;
310}
311
312void MCStreamer::EmitCFIRememberState() {
313  EnsureValidFrame();
314  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
315  MCSymbol *Label = getContext().CreateTempSymbol();
316  EmitLabel(Label);
317  MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
318  CurFrame->Instructions.push_back(Instruction);
319}
320
321void MCStreamer::EmitCFIRestoreState() {
322  // FIXME: Error if there is no matching cfi_remember_state.
323  EnsureValidFrame();
324  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
325  MCSymbol *Label = getContext().CreateTempSymbol();
326  EmitLabel(Label);
327  MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
328  CurFrame->Instructions.push_back(Instruction);
329}
330
331void MCStreamer::EmitCFISameValue(int64_t Register) {
332  EnsureValidFrame();
333  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
334  MCSymbol *Label = getContext().CreateTempSymbol();
335  EmitLabel(Label);
336  MCCFIInstruction Instruction =
337    MCCFIInstruction::createSameValue(Label, Register);
338  CurFrame->Instructions.push_back(Instruction);
339}
340
341void MCStreamer::EmitCFIRestore(int64_t Register) {
342  EnsureValidFrame();
343  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
344  MCSymbol *Label = getContext().CreateTempSymbol();
345  EmitLabel(Label);
346  MCCFIInstruction Instruction =
347    MCCFIInstruction::createRestore(Label, Register);
348  CurFrame->Instructions.push_back(Instruction);
349}
350
351void MCStreamer::EmitCFIEscape(StringRef Values) {
352  EnsureValidFrame();
353  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
354  MCSymbol *Label = getContext().CreateTempSymbol();
355  EmitLabel(Label);
356  MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
357  CurFrame->Instructions.push_back(Instruction);
358}
359
360void MCStreamer::EmitCFISignalFrame() {
361  EnsureValidFrame();
362  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
363  CurFrame->IsSignalFrame = true;
364}
365
366void MCStreamer::EmitCFIUndefined(int64_t Register) {
367  EnsureValidFrame();
368  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
369  MCSymbol *Label = getContext().CreateTempSymbol();
370  EmitLabel(Label);
371  MCCFIInstruction Instruction =
372    MCCFIInstruction::createUndefined(Label, Register);
373  CurFrame->Instructions.push_back(Instruction);
374}
375
376void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
377  W64UnwindInfos.push_back(Frame);
378  CurrentW64UnwindInfo = W64UnwindInfos.back();
379}
380
381void MCStreamer::EnsureValidW64UnwindInfo() {
382  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
383  if (!CurFrame || CurFrame->End)
384    report_fatal_error("No open Win64 EH frame function!");
385}
386
387void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
388  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
389  if (CurFrame && !CurFrame->End)
390    report_fatal_error("Starting a function before ending the previous one!");
391  MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
392  Frame->Begin = getContext().CreateTempSymbol();
393  Frame->Function = Symbol;
394  EmitLabel(Frame->Begin);
395  setCurrentW64UnwindInfo(Frame);
396}
397
398void MCStreamer::EmitWin64EHEndProc() {
399  EnsureValidW64UnwindInfo();
400  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
401  if (CurFrame->ChainedParent)
402    report_fatal_error("Not all chained regions terminated!");
403  CurFrame->End = getContext().CreateTempSymbol();
404  EmitLabel(CurFrame->End);
405}
406
407void MCStreamer::EmitWin64EHStartChained() {
408  EnsureValidW64UnwindInfo();
409  MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
410  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
411  Frame->Begin = getContext().CreateTempSymbol();
412  Frame->Function = CurFrame->Function;
413  Frame->ChainedParent = CurFrame;
414  EmitLabel(Frame->Begin);
415  setCurrentW64UnwindInfo(Frame);
416}
417
418void MCStreamer::EmitWin64EHEndChained() {
419  EnsureValidW64UnwindInfo();
420  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
421  if (!CurFrame->ChainedParent)
422    report_fatal_error("End of a chained region outside a chained region!");
423  CurFrame->End = getContext().CreateTempSymbol();
424  EmitLabel(CurFrame->End);
425  CurrentW64UnwindInfo = CurFrame->ChainedParent;
426}
427
428void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
429                                    bool Except) {
430  EnsureValidW64UnwindInfo();
431  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
432  if (CurFrame->ChainedParent)
433    report_fatal_error("Chained unwind areas can't have handlers!");
434  CurFrame->ExceptionHandler = Sym;
435  if (!Except && !Unwind)
436    report_fatal_error("Don't know what kind of handler this is!");
437  if (Unwind)
438    CurFrame->HandlesUnwind = true;
439  if (Except)
440    CurFrame->HandlesExceptions = true;
441}
442
443void MCStreamer::EmitWin64EHHandlerData() {
444  EnsureValidW64UnwindInfo();
445  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
446  if (CurFrame->ChainedParent)
447    report_fatal_error("Chained unwind areas can't have handlers!");
448}
449
450void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
451  EnsureValidW64UnwindInfo();
452  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
453  MCSymbol *Label = getContext().CreateTempSymbol();
454  MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
455  EmitLabel(Label);
456  CurFrame->Instructions.push_back(Inst);
457}
458
459void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
460  EnsureValidW64UnwindInfo();
461  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
462  if (CurFrame->LastFrameInst >= 0)
463    report_fatal_error("Frame register and offset already specified!");
464  if (Offset & 0x0F)
465    report_fatal_error("Misaligned frame pointer offset!");
466  MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, NULL, Register, Offset);
467  CurFrame->LastFrameInst = CurFrame->Instructions.size();
468  CurFrame->Instructions.push_back(Inst);
469}
470
471void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
472  EnsureValidW64UnwindInfo();
473  if (Size & 7)
474    report_fatal_error("Misaligned stack allocation!");
475  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
476  MCSymbol *Label = getContext().CreateTempSymbol();
477  MCWin64EHInstruction Inst(Label, Size);
478  EmitLabel(Label);
479  CurFrame->Instructions.push_back(Inst);
480}
481
482void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
483  EnsureValidW64UnwindInfo();
484  if (Offset & 7)
485    report_fatal_error("Misaligned saved register offset!");
486  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
487  MCSymbol *Label = getContext().CreateTempSymbol();
488  MCWin64EHInstruction Inst(
489     Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
490                            Label, Register, Offset);
491  EmitLabel(Label);
492  CurFrame->Instructions.push_back(Inst);
493}
494
495void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
496  EnsureValidW64UnwindInfo();
497  if (Offset & 0x0F)
498    report_fatal_error("Misaligned saved vector register offset!");
499  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
500  MCSymbol *Label = getContext().CreateTempSymbol();
501  MCWin64EHInstruction Inst(
502    Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128,
503                            Label, Register, Offset);
504  EmitLabel(Label);
505  CurFrame->Instructions.push_back(Inst);
506}
507
508void MCStreamer::EmitWin64EHPushFrame(bool Code) {
509  EnsureValidW64UnwindInfo();
510  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
511  if (CurFrame->Instructions.size() > 0)
512    report_fatal_error("If present, PushMachFrame must be the first UOP");
513  MCSymbol *Label = getContext().CreateTempSymbol();
514  MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code);
515  EmitLabel(Label);
516  CurFrame->Instructions.push_back(Inst);
517}
518
519void MCStreamer::EmitWin64EHEndProlog() {
520  EnsureValidW64UnwindInfo();
521  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
522  CurFrame->PrologEnd = getContext().CreateTempSymbol();
523  EmitLabel(CurFrame->PrologEnd);
524}
525
526void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
527  llvm_unreachable("This file format doesn't support this directive");
528}
529
530void MCStreamer::EmitFnStart() {
531  errs() << "Not implemented yet\n";
532  abort();
533}
534
535void MCStreamer::EmitFnEnd() {
536  errs() << "Not implemented yet\n";
537  abort();
538}
539
540void MCStreamer::EmitCantUnwind() {
541  errs() << "Not implemented yet\n";
542  abort();
543}
544
545void MCStreamer::EmitHandlerData() {
546  errs() << "Not implemented yet\n";
547  abort();
548}
549
550void MCStreamer::EmitPersonality(const MCSymbol *Personality) {
551  errs() << "Not implemented yet\n";
552  abort();
553}
554
555void MCStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) {
556  errs() << "Not implemented yet\n";
557  abort();
558}
559
560void MCStreamer::EmitPad(int64_t Offset) {
561  errs() << "Not implemented yet\n";
562  abort();
563}
564
565void MCStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool) {
566  errs() << "Not implemented yet\n";
567  abort();
568}
569
570void MCStreamer::EmitTCEntry(const MCSymbol &S) {
571  llvm_unreachable("Unsupported method");
572}
573
574/// EmitRawText - If this file is backed by an assembly streamer, this dumps
575/// the specified string in the output .s file.  This capability is
576/// indicated by the hasRawTextSupport() predicate.
577void MCStreamer::EmitRawText(StringRef String) {
578  errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
579  " something must not be fully mc'ized\n";
580  abort();
581}
582
583void MCStreamer::EmitRawText(const Twine &T) {
584  SmallString<128> Str;
585  T.toVector(Str);
586  EmitRawText(Str.str());
587}
588
589void MCStreamer::EmitFrames(bool usingCFI) {
590  if (!getNumFrameInfos())
591    return;
592
593  if (EmitEHFrame)
594    MCDwarfFrameEmitter::Emit(*this, usingCFI, true);
595
596  if (EmitDebugFrame)
597    MCDwarfFrameEmitter::Emit(*this, usingCFI, false);
598}
599
600void MCStreamer::EmitW64Tables() {
601  if (!getNumW64UnwindInfos())
602    return;
603
604  MCWin64EHUnwindEmitter::Emit(*this);
605}
606
607void MCStreamer::Finish() {
608  if (!FrameInfos.empty() && !FrameInfos.back().End)
609    report_fatal_error("Unfinished frame!");
610
611  FinishImpl();
612}
613