MCStreamer.cpp revision 6f0b181bc70318f8d5d4b9bdead7fc748677fe2a 
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/ADT/SmallString.h"
19#include "llvm/ADT/Twine.h"
20#include <cstdlib>
21using namespace llvm;
22
23MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), EmitEHFrame(true),
24                                         EmitDebugFrame(false),
25                                         CurrentW64UnwindInfo(0),
26                                         LastSymbol(0),
27                                         UniqueCodeBeginSuffix(0),
28                                         UniqueDataBeginSuffix(0) {
29  const MCSection *section = NULL;
30  SectionStack.push_back(std::make_pair(section, section));
31}
32
33MCStreamer::~MCStreamer() {
34  for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
35    delete W64UnwindInfos[i];
36}
37
38const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
39                                          const MCSymbol *A,
40                                          const MCSymbol *B) {
41  MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
42  const MCExpr *ARef =
43    MCSymbolRefExpr::Create(A, Variant, Context);
44  const MCExpr *BRef =
45    MCSymbolRefExpr::Create(B, Variant, Context);
46  const MCExpr *AddrDelta =
47    MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context);
48  return AddrDelta;
49}
50
51const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) {
52  if (Context.getAsmInfo().hasAggressiveSymbolFolding() ||
53      isa<MCSymbolRefExpr>(Expr))
54    return Expr;
55
56  MCSymbol *ABS = Context.CreateTempSymbol();
57  EmitAssignment(ABS, Expr);
58  return MCSymbolRefExpr::Create(ABS, Context);
59}
60
61raw_ostream &MCStreamer::GetCommentOS() {
62  // By default, discard comments.
63  return nulls();
64}
65
66void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta,
67                                      const MCSymbol *Label, int PointerSize) {
68  // emit the sequence to set the address
69  EmitIntValue(dwarf::DW_LNS_extended_op, 1);
70  EmitULEB128IntValue(PointerSize + 1);
71  EmitIntValue(dwarf::DW_LNE_set_address, 1);
72  EmitSymbolValue(Label, PointerSize);
73
74  // emit the sequence for the LineDelta (from 1) and a zero address delta.
75  MCDwarfLineAddr::Emit(this, LineDelta, 0);
76}
77
78/// EmitIntValue - Special case of EmitValue that avoids the client having to
79/// pass in a MCExpr for constant integers.
80void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size,
81                              unsigned AddrSpace) {
82  assert(Size <= 8 && "Invalid size");
83  assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
84         "Invalid size");
85  char buf[8];
86  const bool isLittleEndian = Context.getAsmInfo().isLittleEndian();
87  for (unsigned i = 0; i != Size; ++i) {
88    unsigned index = isLittleEndian ? i : (Size - i - 1);
89    buf[i] = uint8_t(Value >> (index * 8));
90  }
91  EmitBytes(StringRef(buf, Size), AddrSpace);
92}
93
94/// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
95/// client having to pass in a MCExpr for constant integers.
96void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned AddrSpace,
97                                     unsigned Padding) {
98  SmallString<32> Tmp;
99  raw_svector_ostream OSE(Tmp);
100  MCObjectWriter::EncodeULEB128(Value, OSE, Padding);
101  EmitBytes(OSE.str(), AddrSpace);
102}
103
104/// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
105/// client having to pass in a MCExpr for constant integers.
106void MCStreamer::EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace) {
107  SmallString<32> Tmp;
108  raw_svector_ostream OSE(Tmp);
109  MCObjectWriter::EncodeSLEB128(Value, OSE);
110  EmitBytes(OSE.str(), AddrSpace);
111}
112
113void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size,
114                              unsigned AddrSpace) {
115  const MCExpr *ABS = ForceExpAbs(Value);
116  EmitValue(ABS, Size, AddrSpace);
117}
118
119
120void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size,
121                           unsigned AddrSpace) {
122  EmitValueImpl(Value, Size, AddrSpace);
123}
124
125void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
126                                  unsigned AddrSpace) {
127  EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size,
128                AddrSpace);
129}
130
131void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
132  report_fatal_error("unsupported directive in streamer");
133}
134
135/// EmitFill - Emit NumBytes bytes worth of the value specified by
136/// FillValue.  This implements directives such as '.space'.
137void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
138                          unsigned AddrSpace) {
139  const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
140  for (uint64_t i = 0, e = NumBytes; i != e; ++i)
141    EmitValue(E, 1, AddrSpace);
142}
143
144bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
145                                        StringRef Directory,
146                                        StringRef Filename) {
147  return getContext().GetDwarfFile(Directory, Filename, FileNo) == 0;
148}
149
150void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
151                                       unsigned Column, unsigned Flags,
152                                       unsigned Isa,
153                                       unsigned Discriminator,
154                                       StringRef FileName) {
155  getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
156                                  Discriminator);
157}
158
159MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
160  if (FrameInfos.empty())
161    return NULL;
162  return &FrameInfos.back();
163}
164
165void MCStreamer::EnsureValidFrame() {
166  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
167  if (!CurFrame || CurFrame->End)
168    report_fatal_error("No open frame");
169}
170
171void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
172                                     MCSymbol *EHSymbol) {
173}
174
175void MCStreamer::EmitLabel(MCSymbol *Symbol) {
176  assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
177  assert(getCurrentSection() && "Cannot emit before setting section!");
178  Symbol->setSection(*getCurrentSection());
179  LastSymbol = Symbol;
180}
181
182void MCStreamer::EmitDataRegion() {
183  if (RegionIndicator == Data) return;
184
185  MCContext &Context = getContext();
186  const MCAsmInfo &MAI = Context.getAsmInfo();
187  if (!MAI.getSupportsDataRegions()) return;
188
189  // Generate a unique symbol name.
190  MCSymbol *NewSym = Context.GetOrCreateSymbol(MAI.getDataBeginLabelName() +
191                                               Twine(UniqueDataBeginSuffix++));
192  EmitLabel(NewSym);
193
194  RegionIndicator = Data;
195}
196
197void MCStreamer::EmitCodeRegion() {
198  if (RegionIndicator == Code) return;
199
200  MCContext &Context = getContext();
201  const MCAsmInfo &MAI = Context.getAsmInfo();
202  if (!MAI.getSupportsDataRegions()) return;
203
204  // Generate a unique symbol name.
205  MCSymbol *NewSym = Context.GetOrCreateSymbol(MAI.getCodeBeginLabelName() +
206                                               Twine(UniqueCodeBeginSuffix++));
207  EmitLabel(NewSym);
208
209  RegionIndicator = Code;
210}
211
212void MCStreamer::EmitJumpTable8Region() {
213  if (RegionIndicator == JumpTable8) return;
214
215  MCContext &Context = getContext();
216  const MCAsmInfo &MAI = Context.getAsmInfo();
217  if (!MAI.getSupportsDataRegions()) return;
218
219  // Generate a unique symbol name.
220  MCSymbol *NewSym =
221    Context.GetOrCreateSymbol(MAI.getJumpTable8BeginLabelName() +
222                              Twine(UniqueDataBeginSuffix++));
223  EmitLabel(NewSym);
224
225  RegionIndicator = JumpTable8;
226}
227
228void MCStreamer::EmitJumpTable16Region() {
229  if (RegionIndicator == JumpTable16) return;
230
231  MCContext &Context = getContext();
232  const MCAsmInfo &MAI = Context.getAsmInfo();
233  if (!MAI.getSupportsDataRegions()) return;
234
235  // Generate a unique symbol name.
236  MCSymbol *NewSym =
237    Context.GetOrCreateSymbol(MAI.getJumpTable16BeginLabelName() +
238                              Twine(UniqueDataBeginSuffix++));
239  EmitLabel(NewSym);
240
241  RegionIndicator = JumpTable16;
242}
243
244
245void MCStreamer::EmitJumpTable32Region() {
246  if (RegionIndicator == JumpTable32) return;
247
248  MCContext &Context = getContext();
249  const MCAsmInfo &MAI = Context.getAsmInfo();
250  if (!MAI.getSupportsDataRegions()) return;
251
252  // Generate a unique symbol name.
253  MCSymbol *NewSym =
254    Context.GetOrCreateSymbol(MAI.getJumpTable32BeginLabelName() +
255                              Twine(UniqueDataBeginSuffix++));
256  EmitLabel(NewSym);
257
258  RegionIndicator = JumpTable32;
259}
260
261void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
262  EnsureValidFrame();
263  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
264  CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
265}
266
267void MCStreamer::EmitCFISections(bool EH, bool Debug) {
268  assert(EH || Debug);
269  EmitEHFrame = EH;
270  EmitDebugFrame = Debug;
271}
272
273void MCStreamer::EmitCFIStartProc() {
274  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
275  if (CurFrame && !CurFrame->End)
276    report_fatal_error("Starting a frame before finishing the previous one!");
277
278  MCDwarfFrameInfo Frame;
279  Frame.Function = LastSymbol;
280
281  // If the function is externally visible, we need to create a local
282  // symbol to avoid relocations.
283  StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix();
284  if (LastSymbol && LastSymbol->getName().startswith(Prefix)) {
285    Frame.Begin = LastSymbol;
286  } else {
287    Frame.Begin = getContext().CreateTempSymbol();
288    EmitLabel(Frame.Begin);
289  }
290
291  FrameInfos.push_back(Frame);
292  RegionIndicator = Code;
293}
294
295void MCStreamer::EmitCFIEndProc() {
296  EnsureValidFrame();
297  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
298  CurFrame->End = getContext().CreateTempSymbol();
299  EmitLabel(CurFrame->End);
300}
301
302void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
303  EnsureValidFrame();
304  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
305  MCSymbol *Label = getContext().CreateTempSymbol();
306  EmitLabel(Label);
307  MachineLocation Dest(MachineLocation::VirtualFP);
308  MachineLocation Source(Register, -Offset);
309  MCCFIInstruction Instruction(Label, Dest, Source);
310  CurFrame->Instructions.push_back(Instruction);
311}
312
313void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
314  EnsureValidFrame();
315  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
316  MCSymbol *Label = getContext().CreateTempSymbol();
317  EmitLabel(Label);
318  MachineLocation Dest(MachineLocation::VirtualFP);
319  MachineLocation Source(MachineLocation::VirtualFP, -Offset);
320  MCCFIInstruction Instruction(Label, Dest, Source);
321  CurFrame->Instructions.push_back(Instruction);
322}
323
324void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
325  EnsureValidFrame();
326  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
327  MCSymbol *Label = getContext().CreateTempSymbol();
328  EmitLabel(Label);
329  MachineLocation Dest(MachineLocation::VirtualFP);
330  MachineLocation Source(MachineLocation::VirtualFP, Adjustment);
331  MCCFIInstruction Instruction(MCCFIInstruction::RelMove, Label, Dest, Source);
332  CurFrame->Instructions.push_back(Instruction);
333}
334
335void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
336  EnsureValidFrame();
337  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
338  MCSymbol *Label = getContext().CreateTempSymbol();
339  EmitLabel(Label);
340  MachineLocation Dest(Register);
341  MachineLocation Source(MachineLocation::VirtualFP);
342  MCCFIInstruction Instruction(Label, Dest, Source);
343  CurFrame->Instructions.push_back(Instruction);
344}
345
346void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
347  EnsureValidFrame();
348  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
349  MCSymbol *Label = getContext().CreateTempSymbol();
350  EmitLabel(Label);
351  MachineLocation Dest(Register, Offset);
352  MachineLocation Source(Register, Offset);
353  MCCFIInstruction Instruction(Label, Dest, Source);
354  CurFrame->Instructions.push_back(Instruction);
355}
356
357void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
358  EnsureValidFrame();
359  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
360  MCSymbol *Label = getContext().CreateTempSymbol();
361  EmitLabel(Label);
362  MachineLocation Dest(Register, Offset);
363  MachineLocation Source(Register, Offset);
364  MCCFIInstruction Instruction(MCCFIInstruction::RelMove, Label, Dest, Source);
365  CurFrame->Instructions.push_back(Instruction);
366}
367
368void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
369                                    unsigned Encoding) {
370  EnsureValidFrame();
371  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
372  CurFrame->Personality = Sym;
373  CurFrame->PersonalityEncoding = Encoding;
374}
375
376void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
377  EnsureValidFrame();
378  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
379  CurFrame->Lsda = Sym;
380  CurFrame->LsdaEncoding = Encoding;
381}
382
383void MCStreamer::EmitCFIRememberState() {
384  EnsureValidFrame();
385  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
386  MCSymbol *Label = getContext().CreateTempSymbol();
387  EmitLabel(Label);
388  MCCFIInstruction Instruction(MCCFIInstruction::Remember, Label);
389  CurFrame->Instructions.push_back(Instruction);
390}
391
392void MCStreamer::EmitCFIRestoreState() {
393  // FIXME: Error if there is no matching cfi_remember_state.
394  EnsureValidFrame();
395  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
396  MCSymbol *Label = getContext().CreateTempSymbol();
397  EmitLabel(Label);
398  MCCFIInstruction Instruction(MCCFIInstruction::Restore, Label);
399  CurFrame->Instructions.push_back(Instruction);
400}
401
402void MCStreamer::EmitCFISameValue(int64_t Register) {
403  EnsureValidFrame();
404  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
405  MCSymbol *Label = getContext().CreateTempSymbol();
406  EmitLabel(Label);
407  MCCFIInstruction Instruction(MCCFIInstruction::SameValue, Label, Register);
408  CurFrame->Instructions.push_back(Instruction);
409}
410
411void MCStreamer::EmitCFIEscape(StringRef Values) {
412  EnsureValidFrame();
413  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
414  MCSymbol *Label = getContext().CreateTempSymbol();
415  EmitLabel(Label);
416  MCCFIInstruction Instruction(MCCFIInstruction::Escape, Label, Values);
417  CurFrame->Instructions.push_back(Instruction);
418}
419
420void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
421  W64UnwindInfos.push_back(Frame);
422  CurrentW64UnwindInfo = W64UnwindInfos.back();
423}
424
425void MCStreamer::EnsureValidW64UnwindInfo() {
426  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
427  if (!CurFrame || CurFrame->End)
428    report_fatal_error("No open Win64 EH frame function!");
429}
430
431void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
432  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
433  if (CurFrame && !CurFrame->End)
434    report_fatal_error("Starting a function before ending the previous one!");
435  MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
436  Frame->Begin = getContext().CreateTempSymbol();
437  Frame->Function = Symbol;
438  EmitLabel(Frame->Begin);
439  setCurrentW64UnwindInfo(Frame);
440}
441
442void MCStreamer::EmitWin64EHEndProc() {
443  EnsureValidW64UnwindInfo();
444  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
445  if (CurFrame->ChainedParent)
446    report_fatal_error("Not all chained regions terminated!");
447  CurFrame->End = getContext().CreateTempSymbol();
448  EmitLabel(CurFrame->End);
449}
450
451void MCStreamer::EmitWin64EHStartChained() {
452  EnsureValidW64UnwindInfo();
453  MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
454  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
455  Frame->Begin = getContext().CreateTempSymbol();
456  Frame->Function = CurFrame->Function;
457  Frame->ChainedParent = CurFrame;
458  EmitLabel(Frame->Begin);
459  setCurrentW64UnwindInfo(Frame);
460}
461
462void MCStreamer::EmitWin64EHEndChained() {
463  EnsureValidW64UnwindInfo();
464  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
465  if (!CurFrame->ChainedParent)
466    report_fatal_error("End of a chained region outside a chained region!");
467  CurFrame->End = getContext().CreateTempSymbol();
468  EmitLabel(CurFrame->End);
469  CurrentW64UnwindInfo = CurFrame->ChainedParent;
470}
471
472void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
473                                    bool Except) {
474  EnsureValidW64UnwindInfo();
475  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
476  if (CurFrame->ChainedParent)
477    report_fatal_error("Chained unwind areas can't have handlers!");
478  CurFrame->ExceptionHandler = Sym;
479  if (!Except && !Unwind)
480    report_fatal_error("Don't know what kind of handler this is!");
481  if (Unwind)
482    CurFrame->HandlesUnwind = true;
483  if (Except)
484    CurFrame->HandlesExceptions = true;
485}
486
487void MCStreamer::EmitWin64EHHandlerData() {
488  EnsureValidW64UnwindInfo();
489  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
490  if (CurFrame->ChainedParent)
491    report_fatal_error("Chained unwind areas can't have handlers!");
492}
493
494void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
495  EnsureValidW64UnwindInfo();
496  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
497  MCSymbol *Label = getContext().CreateTempSymbol();
498  MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
499  EmitLabel(Label);
500  CurFrame->Instructions.push_back(Inst);
501}
502
503void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
504  EnsureValidW64UnwindInfo();
505  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
506  if (CurFrame->LastFrameInst >= 0)
507    report_fatal_error("Frame register and offset already specified!");
508  if (Offset & 0x0F)
509    report_fatal_error("Misaligned frame pointer offset!");
510  MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, NULL, Register, Offset);
511  CurFrame->LastFrameInst = CurFrame->Instructions.size();
512  CurFrame->Instructions.push_back(Inst);
513}
514
515void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
516  EnsureValidW64UnwindInfo();
517  if (Size & 7)
518    report_fatal_error("Misaligned stack allocation!");
519  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
520  MCSymbol *Label = getContext().CreateTempSymbol();
521  MCWin64EHInstruction Inst(Label, Size);
522  EmitLabel(Label);
523  CurFrame->Instructions.push_back(Inst);
524}
525
526void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
527  EnsureValidW64UnwindInfo();
528  if (Offset & 7)
529    report_fatal_error("Misaligned saved register offset!");
530  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
531  MCSymbol *Label = getContext().CreateTempSymbol();
532  MCWin64EHInstruction Inst(
533     Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
534                            Label, Register, Offset);
535  EmitLabel(Label);
536  CurFrame->Instructions.push_back(Inst);
537}
538
539void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
540  EnsureValidW64UnwindInfo();
541  if (Offset & 0x0F)
542    report_fatal_error("Misaligned saved vector register offset!");
543  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
544  MCSymbol *Label = getContext().CreateTempSymbol();
545  MCWin64EHInstruction Inst(
546    Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128,
547                            Label, Register, Offset);
548  EmitLabel(Label);
549  CurFrame->Instructions.push_back(Inst);
550}
551
552void MCStreamer::EmitWin64EHPushFrame(bool Code) {
553  EnsureValidW64UnwindInfo();
554  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
555  if (CurFrame->Instructions.size() > 0)
556    report_fatal_error("If present, PushMachFrame must be the first UOP");
557  MCSymbol *Label = getContext().CreateTempSymbol();
558  MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code);
559  EmitLabel(Label);
560  CurFrame->Instructions.push_back(Inst);
561}
562
563void MCStreamer::EmitWin64EHEndProlog() {
564  EnsureValidW64UnwindInfo();
565  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
566  CurFrame->PrologEnd = getContext().CreateTempSymbol();
567  EmitLabel(CurFrame->PrologEnd);
568}
569
570void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
571  assert(0 && "This file format doesn't support this directive");
572}
573
574void MCStreamer::EmitFnStart() {
575  errs() << "Not implemented yet\n";
576  abort();
577}
578
579void MCStreamer::EmitFnEnd() {
580  errs() << "Not implemented yet\n";
581  abort();
582}
583
584void MCStreamer::EmitCantUnwind() {
585  errs() << "Not implemented yet\n";
586  abort();
587}
588
589void MCStreamer::EmitHandlerData() {
590  errs() << "Not implemented yet\n";
591  abort();
592}
593
594void MCStreamer::EmitPersonality(const MCSymbol *Personality) {
595  errs() << "Not implemented yet\n";
596  abort();
597}
598
599void MCStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) {
600  errs() << "Not implemented yet\n";
601  abort();
602}
603
604void MCStreamer::EmitPad(int64_t Offset) {
605  errs() << "Not implemented yet\n";
606  abort();
607}
608
609void MCStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool) {
610  errs() << "Not implemented yet\n";
611  abort();
612}
613
614/// EmitRawText - If this file is backed by an assembly streamer, this dumps
615/// the specified string in the output .s file.  This capability is
616/// indicated by the hasRawTextSupport() predicate.
617void MCStreamer::EmitRawText(StringRef String) {
618  errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
619  " something must not be fully mc'ized\n";
620  abort();
621}
622
623void MCStreamer::EmitRawText(const Twine &T) {
624  SmallString<128> Str;
625  T.toVector(Str);
626  EmitRawText(Str.str());
627}
628
629void MCStreamer::EmitFrames(bool usingCFI) {
630  if (!getNumFrameInfos())
631    return;
632
633  if (EmitEHFrame)
634    MCDwarfFrameEmitter::Emit(*this, usingCFI, true);
635
636  if (EmitDebugFrame)
637    MCDwarfFrameEmitter::Emit(*this, usingCFI, false);
638}
639
640void MCStreamer::EmitW64Tables() {
641  if (!getNumW64UnwindInfos())
642    return;
643
644  MCWin64EHUnwindEmitter::Emit(*this);
645}
646