MCStreamer.cpp revision b601ab5cce6c560dff365cd87f6854ea95f76f54 
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<128> 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<128> 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::EmitGPRel64Value(const MCExpr *Value) {
132  report_fatal_error("unsupported directive in streamer");
133}
134
135void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
136  report_fatal_error("unsupported directive in streamer");
137}
138
139/// EmitFill - Emit NumBytes bytes worth of the value specified by
140/// FillValue.  This implements directives such as '.space'.
141void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
142                          unsigned AddrSpace) {
143  const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
144  for (uint64_t i = 0, e = NumBytes; i != e; ++i)
145    EmitValue(E, 1, AddrSpace);
146}
147
148bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
149                                        StringRef Directory,
150                                        StringRef Filename) {
151  return getContext().GetDwarfFile(Directory, Filename, FileNo) == 0;
152}
153
154void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
155                                       unsigned Column, unsigned Flags,
156                                       unsigned Isa,
157                                       unsigned Discriminator,
158                                       StringRef FileName) {
159  getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
160                                  Discriminator);
161}
162
163MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
164  if (FrameInfos.empty())
165    return NULL;
166  return &FrameInfos.back();
167}
168
169void MCStreamer::EnsureValidFrame() {
170  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
171  if (!CurFrame || CurFrame->End)
172    report_fatal_error("No open frame");
173}
174
175void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
176                                     MCSymbol *EHSymbol) {
177}
178
179void MCStreamer::EmitLabel(MCSymbol *Symbol) {
180  assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
181  assert(getCurrentSection() && "Cannot emit before setting section!");
182  Symbol->setSection(*getCurrentSection());
183  LastSymbol = Symbol;
184}
185
186void MCStreamer::EmitDataRegion() {
187  if (RegionIndicator == Data) return;
188
189  MCContext &Context = getContext();
190  const MCAsmInfo &MAI = Context.getAsmInfo();
191  if (!MAI.getSupportsDataRegions()) return;
192
193  // Generate a unique symbol name.
194  MCSymbol *NewSym = Context.GetOrCreateSymbol(MAI.getDataBeginLabelName() +
195                                               Twine(UniqueDataBeginSuffix++));
196  EmitLabel(NewSym);
197
198  RegionIndicator = Data;
199}
200
201void MCStreamer::EmitCodeRegion() {
202  if (RegionIndicator == Code) return;
203
204  MCContext &Context = getContext();
205  const MCAsmInfo &MAI = Context.getAsmInfo();
206  if (!MAI.getSupportsDataRegions()) return;
207
208  // Generate a unique symbol name.
209  MCSymbol *NewSym = Context.GetOrCreateSymbol(MAI.getCodeBeginLabelName() +
210                                               Twine(UniqueCodeBeginSuffix++));
211  EmitLabel(NewSym);
212
213  RegionIndicator = Code;
214}
215
216void MCStreamer::EmitJumpTable8Region() {
217  if (RegionIndicator == JumpTable8) return;
218
219  MCContext &Context = getContext();
220  const MCAsmInfo &MAI = Context.getAsmInfo();
221  if (!MAI.getSupportsDataRegions()) return;
222
223  // Generate a unique symbol name.
224  MCSymbol *NewSym =
225    Context.GetOrCreateSymbol(MAI.getJumpTable8BeginLabelName() +
226                              Twine(UniqueDataBeginSuffix++));
227  EmitLabel(NewSym);
228
229  RegionIndicator = JumpTable8;
230}
231
232void MCStreamer::EmitJumpTable16Region() {
233  if (RegionIndicator == JumpTable16) return;
234
235  MCContext &Context = getContext();
236  const MCAsmInfo &MAI = Context.getAsmInfo();
237  if (!MAI.getSupportsDataRegions()) return;
238
239  // Generate a unique symbol name.
240  MCSymbol *NewSym =
241    Context.GetOrCreateSymbol(MAI.getJumpTable16BeginLabelName() +
242                              Twine(UniqueDataBeginSuffix++));
243  EmitLabel(NewSym);
244
245  RegionIndicator = JumpTable16;
246}
247
248
249void MCStreamer::EmitJumpTable32Region() {
250  if (RegionIndicator == JumpTable32) return;
251
252  MCContext &Context = getContext();
253  const MCAsmInfo &MAI = Context.getAsmInfo();
254  if (!MAI.getSupportsDataRegions()) return;
255
256  // Generate a unique symbol name.
257  MCSymbol *NewSym =
258    Context.GetOrCreateSymbol(MAI.getJumpTable32BeginLabelName() +
259                              Twine(UniqueDataBeginSuffix++));
260  EmitLabel(NewSym);
261
262  RegionIndicator = JumpTable32;
263}
264
265void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
266  EnsureValidFrame();
267  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
268  CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
269}
270
271void MCStreamer::EmitCFISections(bool EH, bool Debug) {
272  assert(EH || Debug);
273  EmitEHFrame = EH;
274  EmitDebugFrame = Debug;
275}
276
277void MCStreamer::EmitCFIStartProc() {
278  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
279  if (CurFrame && !CurFrame->End)
280    report_fatal_error("Starting a frame before finishing the previous one!");
281
282  MCDwarfFrameInfo Frame;
283  EmitCFIStartProcImpl(Frame);
284
285  FrameInfos.push_back(Frame);
286  RegionIndicator = Code;
287}
288
289void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
290}
291
292void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
293  Frame.Function = LastSymbol;
294  // If the function is externally visible, we need to create a local
295  // symbol to avoid relocations.
296  StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix();
297  if (LastSymbol && LastSymbol->getName().startswith(Prefix)) {
298    Frame.Begin = LastSymbol;
299  } else {
300    Frame.Begin = getContext().CreateTempSymbol();
301    EmitLabel(Frame.Begin);
302  }
303}
304
305void MCStreamer::EmitCFIEndProc() {
306  EnsureValidFrame();
307  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
308  EmitCFIEndProcImpl(*CurFrame);
309}
310
311void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
312}
313
314void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
315  Frame.End = getContext().CreateTempSymbol();
316  EmitLabel(Frame.End);
317}
318
319void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
320  EnsureValidFrame();
321  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
322  MCSymbol *Label = getContext().CreateTempSymbol();
323  EmitLabel(Label);
324  MachineLocation Dest(MachineLocation::VirtualFP);
325  MachineLocation Source(Register, -Offset);
326  MCCFIInstruction Instruction(Label, Dest, Source);
327  CurFrame->Instructions.push_back(Instruction);
328}
329
330void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
331  EnsureValidFrame();
332  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
333  MCSymbol *Label = getContext().CreateTempSymbol();
334  EmitLabel(Label);
335  MachineLocation Dest(MachineLocation::VirtualFP);
336  MachineLocation Source(MachineLocation::VirtualFP, -Offset);
337  MCCFIInstruction Instruction(Label, Dest, Source);
338  CurFrame->Instructions.push_back(Instruction);
339}
340
341void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
342  EnsureValidFrame();
343  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
344  MCSymbol *Label = getContext().CreateTempSymbol();
345  EmitLabel(Label);
346  MachineLocation Dest(MachineLocation::VirtualFP);
347  MachineLocation Source(MachineLocation::VirtualFP, Adjustment);
348  MCCFIInstruction Instruction(MCCFIInstruction::RelMove, Label, Dest, Source);
349  CurFrame->Instructions.push_back(Instruction);
350}
351
352void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
353  EnsureValidFrame();
354  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
355  MCSymbol *Label = getContext().CreateTempSymbol();
356  EmitLabel(Label);
357  MachineLocation Dest(Register);
358  MachineLocation Source(MachineLocation::VirtualFP);
359  MCCFIInstruction Instruction(Label, Dest, Source);
360  CurFrame->Instructions.push_back(Instruction);
361}
362
363void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
364  EnsureValidFrame();
365  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
366  MCSymbol *Label = getContext().CreateTempSymbol();
367  EmitLabel(Label);
368  MachineLocation Dest(Register, Offset);
369  MachineLocation Source(Register, Offset);
370  MCCFIInstruction Instruction(Label, Dest, Source);
371  CurFrame->Instructions.push_back(Instruction);
372}
373
374void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
375  EnsureValidFrame();
376  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
377  MCSymbol *Label = getContext().CreateTempSymbol();
378  EmitLabel(Label);
379  MachineLocation Dest(Register, Offset);
380  MachineLocation Source(Register, Offset);
381  MCCFIInstruction Instruction(MCCFIInstruction::RelMove, Label, Dest, Source);
382  CurFrame->Instructions.push_back(Instruction);
383}
384
385void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
386                                    unsigned Encoding) {
387  EnsureValidFrame();
388  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
389  CurFrame->Personality = Sym;
390  CurFrame->PersonalityEncoding = Encoding;
391}
392
393void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
394  EnsureValidFrame();
395  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
396  CurFrame->Lsda = Sym;
397  CurFrame->LsdaEncoding = Encoding;
398}
399
400void MCStreamer::EmitCFIRememberState() {
401  EnsureValidFrame();
402  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
403  MCSymbol *Label = getContext().CreateTempSymbol();
404  EmitLabel(Label);
405  MCCFIInstruction Instruction(MCCFIInstruction::RememberState, Label);
406  CurFrame->Instructions.push_back(Instruction);
407}
408
409void MCStreamer::EmitCFIRestoreState() {
410  // FIXME: Error if there is no matching cfi_remember_state.
411  EnsureValidFrame();
412  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
413  MCSymbol *Label = getContext().CreateTempSymbol();
414  EmitLabel(Label);
415  MCCFIInstruction Instruction(MCCFIInstruction::RestoreState, Label);
416  CurFrame->Instructions.push_back(Instruction);
417}
418
419void MCStreamer::EmitCFISameValue(int64_t Register) {
420  EnsureValidFrame();
421  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
422  MCSymbol *Label = getContext().CreateTempSymbol();
423  EmitLabel(Label);
424  MCCFIInstruction Instruction(MCCFIInstruction::SameValue, Label, Register);
425  CurFrame->Instructions.push_back(Instruction);
426}
427
428void MCStreamer::EmitCFIRestore(int64_t Register) {
429  EnsureValidFrame();
430  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
431  MCSymbol *Label = getContext().CreateTempSymbol();
432  EmitLabel(Label);
433  MCCFIInstruction Instruction(MCCFIInstruction::Restore, Label, Register);
434  CurFrame->Instructions.push_back(Instruction);
435}
436
437void MCStreamer::EmitCFIEscape(StringRef Values) {
438  EnsureValidFrame();
439  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
440  MCSymbol *Label = getContext().CreateTempSymbol();
441  EmitLabel(Label);
442  MCCFIInstruction Instruction(MCCFIInstruction::Escape, Label, Values);
443  CurFrame->Instructions.push_back(Instruction);
444}
445
446void MCStreamer::EmitCFISignalFrame() {
447  EnsureValidFrame();
448  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
449  CurFrame->IsSignalFrame = true;
450}
451
452void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
453  W64UnwindInfos.push_back(Frame);
454  CurrentW64UnwindInfo = W64UnwindInfos.back();
455}
456
457void MCStreamer::EnsureValidW64UnwindInfo() {
458  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
459  if (!CurFrame || CurFrame->End)
460    report_fatal_error("No open Win64 EH frame function!");
461}
462
463void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
464  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
465  if (CurFrame && !CurFrame->End)
466    report_fatal_error("Starting a function before ending the previous one!");
467  MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
468  Frame->Begin = getContext().CreateTempSymbol();
469  Frame->Function = Symbol;
470  EmitLabel(Frame->Begin);
471  setCurrentW64UnwindInfo(Frame);
472}
473
474void MCStreamer::EmitWin64EHEndProc() {
475  EnsureValidW64UnwindInfo();
476  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
477  if (CurFrame->ChainedParent)
478    report_fatal_error("Not all chained regions terminated!");
479  CurFrame->End = getContext().CreateTempSymbol();
480  EmitLabel(CurFrame->End);
481}
482
483void MCStreamer::EmitWin64EHStartChained() {
484  EnsureValidW64UnwindInfo();
485  MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
486  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
487  Frame->Begin = getContext().CreateTempSymbol();
488  Frame->Function = CurFrame->Function;
489  Frame->ChainedParent = CurFrame;
490  EmitLabel(Frame->Begin);
491  setCurrentW64UnwindInfo(Frame);
492}
493
494void MCStreamer::EmitWin64EHEndChained() {
495  EnsureValidW64UnwindInfo();
496  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
497  if (!CurFrame->ChainedParent)
498    report_fatal_error("End of a chained region outside a chained region!");
499  CurFrame->End = getContext().CreateTempSymbol();
500  EmitLabel(CurFrame->End);
501  CurrentW64UnwindInfo = CurFrame->ChainedParent;
502}
503
504void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
505                                    bool Except) {
506  EnsureValidW64UnwindInfo();
507  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
508  if (CurFrame->ChainedParent)
509    report_fatal_error("Chained unwind areas can't have handlers!");
510  CurFrame->ExceptionHandler = Sym;
511  if (!Except && !Unwind)
512    report_fatal_error("Don't know what kind of handler this is!");
513  if (Unwind)
514    CurFrame->HandlesUnwind = true;
515  if (Except)
516    CurFrame->HandlesExceptions = true;
517}
518
519void MCStreamer::EmitWin64EHHandlerData() {
520  EnsureValidW64UnwindInfo();
521  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
522  if (CurFrame->ChainedParent)
523    report_fatal_error("Chained unwind areas can't have handlers!");
524}
525
526void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
527  EnsureValidW64UnwindInfo();
528  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
529  MCSymbol *Label = getContext().CreateTempSymbol();
530  MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
531  EmitLabel(Label);
532  CurFrame->Instructions.push_back(Inst);
533}
534
535void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
536  EnsureValidW64UnwindInfo();
537  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
538  if (CurFrame->LastFrameInst >= 0)
539    report_fatal_error("Frame register and offset already specified!");
540  if (Offset & 0x0F)
541    report_fatal_error("Misaligned frame pointer offset!");
542  MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, NULL, Register, Offset);
543  CurFrame->LastFrameInst = CurFrame->Instructions.size();
544  CurFrame->Instructions.push_back(Inst);
545}
546
547void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
548  EnsureValidW64UnwindInfo();
549  if (Size & 7)
550    report_fatal_error("Misaligned stack allocation!");
551  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
552  MCSymbol *Label = getContext().CreateTempSymbol();
553  MCWin64EHInstruction Inst(Label, Size);
554  EmitLabel(Label);
555  CurFrame->Instructions.push_back(Inst);
556}
557
558void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
559  EnsureValidW64UnwindInfo();
560  if (Offset & 7)
561    report_fatal_error("Misaligned saved register offset!");
562  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
563  MCSymbol *Label = getContext().CreateTempSymbol();
564  MCWin64EHInstruction Inst(
565     Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
566                            Label, Register, Offset);
567  EmitLabel(Label);
568  CurFrame->Instructions.push_back(Inst);
569}
570
571void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
572  EnsureValidW64UnwindInfo();
573  if (Offset & 0x0F)
574    report_fatal_error("Misaligned saved vector register offset!");
575  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
576  MCSymbol *Label = getContext().CreateTempSymbol();
577  MCWin64EHInstruction Inst(
578    Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128,
579                            Label, Register, Offset);
580  EmitLabel(Label);
581  CurFrame->Instructions.push_back(Inst);
582}
583
584void MCStreamer::EmitWin64EHPushFrame(bool Code) {
585  EnsureValidW64UnwindInfo();
586  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
587  if (CurFrame->Instructions.size() > 0)
588    report_fatal_error("If present, PushMachFrame must be the first UOP");
589  MCSymbol *Label = getContext().CreateTempSymbol();
590  MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code);
591  EmitLabel(Label);
592  CurFrame->Instructions.push_back(Inst);
593}
594
595void MCStreamer::EmitWin64EHEndProlog() {
596  EnsureValidW64UnwindInfo();
597  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
598  CurFrame->PrologEnd = getContext().CreateTempSymbol();
599  EmitLabel(CurFrame->PrologEnd);
600}
601
602void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
603  llvm_unreachable("This file format doesn't support this directive");
604}
605
606void MCStreamer::EmitFnStart() {
607  errs() << "Not implemented yet\n";
608  abort();
609}
610
611void MCStreamer::EmitFnEnd() {
612  errs() << "Not implemented yet\n";
613  abort();
614}
615
616void MCStreamer::EmitCantUnwind() {
617  errs() << "Not implemented yet\n";
618  abort();
619}
620
621void MCStreamer::EmitHandlerData() {
622  errs() << "Not implemented yet\n";
623  abort();
624}
625
626void MCStreamer::EmitPersonality(const MCSymbol *Personality) {
627  errs() << "Not implemented yet\n";
628  abort();
629}
630
631void MCStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) {
632  errs() << "Not implemented yet\n";
633  abort();
634}
635
636void MCStreamer::EmitPad(int64_t Offset) {
637  errs() << "Not implemented yet\n";
638  abort();
639}
640
641void MCStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool) {
642  errs() << "Not implemented yet\n";
643  abort();
644}
645
646/// EmitRawText - If this file is backed by an assembly streamer, this dumps
647/// the specified string in the output .s file.  This capability is
648/// indicated by the hasRawTextSupport() predicate.
649void MCStreamer::EmitRawText(StringRef String) {
650  errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
651  " something must not be fully mc'ized\n";
652  abort();
653}
654
655void MCStreamer::EmitRawText(const Twine &T) {
656  SmallString<128> Str;
657  T.toVector(Str);
658  EmitRawText(Str.str());
659}
660
661void MCStreamer::EmitFrames(bool usingCFI) {
662  if (!getNumFrameInfos())
663    return;
664
665  if (EmitEHFrame)
666    MCDwarfFrameEmitter::Emit(*this, usingCFI, true);
667
668  if (EmitDebugFrame)
669    MCDwarfFrameEmitter::Emit(*this, usingCFI, false);
670}
671
672void MCStreamer::EmitW64Tables() {
673  if (!getNumW64UnwindInfos())
674    return;
675
676  MCWin64EHUnwindEmitter::Emit(*this);
677}
678
679void MCStreamer::Finish() {
680  if (!FrameInfos.empty() && !FrameInfos.back().End)
681    report_fatal_error("Unfinished frame!");
682
683  FinishImpl();
684}
685