MCStreamer.cpp revision d04a8d4b33ff316ca4cf961e06c9e312eff8e64f 
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/MCStreamer.h"
11#include "llvm/ADT/SmallString.h"
12#include "llvm/ADT/Twine.h"
13#include "llvm/MC/MCAsmInfo.h"
14#include "llvm/MC/MCContext.h"
15#include "llvm/MC/MCExpr.h"
16#include "llvm/MC/MCObjectWriter.h"
17#include "llvm/MC/MCSymbol.h"
18#include "llvm/Support/ErrorHandling.h"
19#include "llvm/Support/LEB128.h"
20#include "llvm/Support/raw_ostream.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
237MCSymbol *MCStreamer::EmitCFICommon() {
238  EnsureValidFrame();
239  MCSymbol *Label = getContext().CreateTempSymbol();
240  EmitLabel(Label);
241  return Label;
242}
243
244void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
245  MCSymbol *Label = EmitCFICommon();
246  MCCFIInstruction Instruction =
247    MCCFIInstruction::createDefCfa(Label, Register, Offset);
248  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
249  CurFrame->Instructions.push_back(Instruction);
250}
251
252void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
253  MCSymbol *Label = EmitCFICommon();
254  MCCFIInstruction Instruction =
255    MCCFIInstruction::createDefCfaOffset(Label, Offset);
256  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
257  CurFrame->Instructions.push_back(Instruction);
258}
259
260void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
261  MCSymbol *Label = EmitCFICommon();
262  MCCFIInstruction Instruction =
263    MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
264  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
265  CurFrame->Instructions.push_back(Instruction);
266}
267
268void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
269  MCSymbol *Label = EmitCFICommon();
270  MCCFIInstruction Instruction =
271    MCCFIInstruction::createDefCfaRegister(Label, Register);
272  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
273  CurFrame->Instructions.push_back(Instruction);
274}
275
276void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
277  MCSymbol *Label = EmitCFICommon();
278  MCCFIInstruction Instruction =
279    MCCFIInstruction::createOffset(Label, Register, Offset);
280  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
281  CurFrame->Instructions.push_back(Instruction);
282}
283
284void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
285  MCSymbol *Label = EmitCFICommon();
286  MCCFIInstruction Instruction =
287    MCCFIInstruction::createRelOffset(Label, Register, Offset);
288  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
289  CurFrame->Instructions.push_back(Instruction);
290}
291
292void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
293                                    unsigned Encoding) {
294  EnsureValidFrame();
295  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
296  CurFrame->Personality = Sym;
297  CurFrame->PersonalityEncoding = Encoding;
298}
299
300void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
301  EnsureValidFrame();
302  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
303  CurFrame->Lsda = Sym;
304  CurFrame->LsdaEncoding = Encoding;
305}
306
307void MCStreamer::EmitCFIRememberState() {
308  MCSymbol *Label = EmitCFICommon();
309  MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
310  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
311  CurFrame->Instructions.push_back(Instruction);
312}
313
314void MCStreamer::EmitCFIRestoreState() {
315  // FIXME: Error if there is no matching cfi_remember_state.
316  MCSymbol *Label = EmitCFICommon();
317  MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
318  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
319  CurFrame->Instructions.push_back(Instruction);
320}
321
322void MCStreamer::EmitCFISameValue(int64_t Register) {
323  MCSymbol *Label = EmitCFICommon();
324  MCCFIInstruction Instruction =
325    MCCFIInstruction::createSameValue(Label, Register);
326  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
327  CurFrame->Instructions.push_back(Instruction);
328}
329
330void MCStreamer::EmitCFIRestore(int64_t Register) {
331  MCSymbol *Label = EmitCFICommon();
332  MCCFIInstruction Instruction =
333    MCCFIInstruction::createRestore(Label, Register);
334  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
335  CurFrame->Instructions.push_back(Instruction);
336}
337
338void MCStreamer::EmitCFIEscape(StringRef Values) {
339  MCSymbol *Label = EmitCFICommon();
340  MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
341  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
342  CurFrame->Instructions.push_back(Instruction);
343}
344
345void MCStreamer::EmitCFISignalFrame() {
346  EnsureValidFrame();
347  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
348  CurFrame->IsSignalFrame = true;
349}
350
351void MCStreamer::EmitCFIUndefined(int64_t Register) {
352  MCSymbol *Label = EmitCFICommon();
353  MCCFIInstruction Instruction =
354    MCCFIInstruction::createUndefined(Label, Register);
355  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
356  CurFrame->Instructions.push_back(Instruction);
357}
358
359void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
360  MCSymbol *Label = EmitCFICommon();
361  MCCFIInstruction Instruction =
362    MCCFIInstruction::createRegister(Label, Register1, Register2);
363  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
364  CurFrame->Instructions.push_back(Instruction);
365}
366
367void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
368  W64UnwindInfos.push_back(Frame);
369  CurrentW64UnwindInfo = W64UnwindInfos.back();
370}
371
372void MCStreamer::EnsureValidW64UnwindInfo() {
373  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
374  if (!CurFrame || CurFrame->End)
375    report_fatal_error("No open Win64 EH frame function!");
376}
377
378void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
379  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
380  if (CurFrame && !CurFrame->End)
381    report_fatal_error("Starting a function before ending the previous one!");
382  MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
383  Frame->Begin = getContext().CreateTempSymbol();
384  Frame->Function = Symbol;
385  EmitLabel(Frame->Begin);
386  setCurrentW64UnwindInfo(Frame);
387}
388
389void MCStreamer::EmitWin64EHEndProc() {
390  EnsureValidW64UnwindInfo();
391  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
392  if (CurFrame->ChainedParent)
393    report_fatal_error("Not all chained regions terminated!");
394  CurFrame->End = getContext().CreateTempSymbol();
395  EmitLabel(CurFrame->End);
396}
397
398void MCStreamer::EmitWin64EHStartChained() {
399  EnsureValidW64UnwindInfo();
400  MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
401  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
402  Frame->Begin = getContext().CreateTempSymbol();
403  Frame->Function = CurFrame->Function;
404  Frame->ChainedParent = CurFrame;
405  EmitLabel(Frame->Begin);
406  setCurrentW64UnwindInfo(Frame);
407}
408
409void MCStreamer::EmitWin64EHEndChained() {
410  EnsureValidW64UnwindInfo();
411  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
412  if (!CurFrame->ChainedParent)
413    report_fatal_error("End of a chained region outside a chained region!");
414  CurFrame->End = getContext().CreateTempSymbol();
415  EmitLabel(CurFrame->End);
416  CurrentW64UnwindInfo = CurFrame->ChainedParent;
417}
418
419void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
420                                    bool Except) {
421  EnsureValidW64UnwindInfo();
422  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
423  if (CurFrame->ChainedParent)
424    report_fatal_error("Chained unwind areas can't have handlers!");
425  CurFrame->ExceptionHandler = Sym;
426  if (!Except && !Unwind)
427    report_fatal_error("Don't know what kind of handler this is!");
428  if (Unwind)
429    CurFrame->HandlesUnwind = true;
430  if (Except)
431    CurFrame->HandlesExceptions = true;
432}
433
434void MCStreamer::EmitWin64EHHandlerData() {
435  EnsureValidW64UnwindInfo();
436  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
437  if (CurFrame->ChainedParent)
438    report_fatal_error("Chained unwind areas can't have handlers!");
439}
440
441void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
442  EnsureValidW64UnwindInfo();
443  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
444  MCSymbol *Label = getContext().CreateTempSymbol();
445  MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
446  EmitLabel(Label);
447  CurFrame->Instructions.push_back(Inst);
448}
449
450void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
451  EnsureValidW64UnwindInfo();
452  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
453  if (CurFrame->LastFrameInst >= 0)
454    report_fatal_error("Frame register and offset already specified!");
455  if (Offset & 0x0F)
456    report_fatal_error("Misaligned frame pointer offset!");
457  MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, NULL, Register, Offset);
458  CurFrame->LastFrameInst = CurFrame->Instructions.size();
459  CurFrame->Instructions.push_back(Inst);
460}
461
462void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
463  EnsureValidW64UnwindInfo();
464  if (Size & 7)
465    report_fatal_error("Misaligned stack allocation!");
466  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
467  MCSymbol *Label = getContext().CreateTempSymbol();
468  MCWin64EHInstruction Inst(Label, Size);
469  EmitLabel(Label);
470  CurFrame->Instructions.push_back(Inst);
471}
472
473void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
474  EnsureValidW64UnwindInfo();
475  if (Offset & 7)
476    report_fatal_error("Misaligned saved register offset!");
477  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
478  MCSymbol *Label = getContext().CreateTempSymbol();
479  MCWin64EHInstruction Inst(
480     Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
481                            Label, Register, Offset);
482  EmitLabel(Label);
483  CurFrame->Instructions.push_back(Inst);
484}
485
486void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
487  EnsureValidW64UnwindInfo();
488  if (Offset & 0x0F)
489    report_fatal_error("Misaligned saved vector register offset!");
490  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
491  MCSymbol *Label = getContext().CreateTempSymbol();
492  MCWin64EHInstruction Inst(
493    Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128,
494                            Label, Register, Offset);
495  EmitLabel(Label);
496  CurFrame->Instructions.push_back(Inst);
497}
498
499void MCStreamer::EmitWin64EHPushFrame(bool Code) {
500  EnsureValidW64UnwindInfo();
501  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
502  if (CurFrame->Instructions.size() > 0)
503    report_fatal_error("If present, PushMachFrame must be the first UOP");
504  MCSymbol *Label = getContext().CreateTempSymbol();
505  MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code);
506  EmitLabel(Label);
507  CurFrame->Instructions.push_back(Inst);
508}
509
510void MCStreamer::EmitWin64EHEndProlog() {
511  EnsureValidW64UnwindInfo();
512  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
513  CurFrame->PrologEnd = getContext().CreateTempSymbol();
514  EmitLabel(CurFrame->PrologEnd);
515}
516
517void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
518  llvm_unreachable("This file format doesn't support this directive");
519}
520
521void MCStreamer::EmitFnStart() {
522  errs() << "Not implemented yet\n";
523  abort();
524}
525
526void MCStreamer::EmitFnEnd() {
527  errs() << "Not implemented yet\n";
528  abort();
529}
530
531void MCStreamer::EmitCantUnwind() {
532  errs() << "Not implemented yet\n";
533  abort();
534}
535
536void MCStreamer::EmitHandlerData() {
537  errs() << "Not implemented yet\n";
538  abort();
539}
540
541void MCStreamer::EmitPersonality(const MCSymbol *Personality) {
542  errs() << "Not implemented yet\n";
543  abort();
544}
545
546void MCStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) {
547  errs() << "Not implemented yet\n";
548  abort();
549}
550
551void MCStreamer::EmitPad(int64_t Offset) {
552  errs() << "Not implemented yet\n";
553  abort();
554}
555
556void MCStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool) {
557  errs() << "Not implemented yet\n";
558  abort();
559}
560
561void MCStreamer::EmitTCEntry(const MCSymbol &S) {
562  llvm_unreachable("Unsupported method");
563}
564
565/// EmitRawText - If this file is backed by an assembly streamer, this dumps
566/// the specified string in the output .s file.  This capability is
567/// indicated by the hasRawTextSupport() predicate.
568void MCStreamer::EmitRawText(StringRef String) {
569  errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
570  " something must not be fully mc'ized\n";
571  abort();
572}
573
574void MCStreamer::EmitRawText(const Twine &T) {
575  SmallString<128> Str;
576  T.toVector(Str);
577  EmitRawText(Str.str());
578}
579
580void MCStreamer::EmitFrames(bool usingCFI) {
581  if (!getNumFrameInfos())
582    return;
583
584  if (EmitEHFrame)
585    MCDwarfFrameEmitter::Emit(*this, usingCFI, true);
586
587  if (EmitDebugFrame)
588    MCDwarfFrameEmitter::Emit(*this, usingCFI, false);
589}
590
591void MCStreamer::EmitW64Tables() {
592  if (!getNumW64UnwindInfos())
593    return;
594
595  MCWin64EHUnwindEmitter::Emit(*this);
596}
597
598void MCStreamer::Finish() {
599  if (!FrameInfos.empty() && !FrameInfos.back().End)
600    report_fatal_error("Unfinished frame!");
601
602  FinishImpl();
603}
604