LLVM  6.0.0svn
AsmPrinterInlineAsm.cpp
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1 //===-- AsmPrinterInlineAsm.cpp - AsmPrinter Inline Asm Handling ----------===//
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 // This file implements the inline assembler pieces of the AsmPrinter class.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "llvm/ADT/SmallString.h"
15 #include "llvm/ADT/Twine.h"
23 #include "llvm/IR/Constants.h"
24 #include "llvm/IR/DataLayout.h"
25 #include "llvm/IR/InlineAsm.h"
26 #include "llvm/IR/LLVMContext.h"
27 #include "llvm/IR/Module.h"
28 #include "llvm/MC/MCAsmInfo.h"
30 #include "llvm/MC/MCStreamer.h"
32 #include "llvm/MC/MCSymbol.h"
35 #include "llvm/Support/SourceMgr.h"
39 using namespace llvm;
40 
41 #define DEBUG_TYPE "asm-printer"
42 
43 /// srcMgrDiagHandler - This callback is invoked when the SourceMgr for an
44 /// inline asm has an error in it. diagInfo is a pointer to the SrcMgrDiagInfo
45 /// struct above.
46 static void srcMgrDiagHandler(const SMDiagnostic &Diag, void *diagInfo) {
47  AsmPrinter::SrcMgrDiagInfo *DiagInfo =
48  static_cast<AsmPrinter::SrcMgrDiagInfo *>(diagInfo);
49  assert(DiagInfo && "Diagnostic context not passed down?");
50 
51  // Look up a LocInfo for the buffer this diagnostic is coming from.
52  unsigned BufNum = DiagInfo->SrcMgr.FindBufferContainingLoc(Diag.getLoc());
53  const MDNode *LocInfo = nullptr;
54  if (BufNum > 0 && BufNum <= DiagInfo->LocInfos.size())
55  LocInfo = DiagInfo->LocInfos[BufNum-1];
56 
57  // If the inline asm had metadata associated with it, pull out a location
58  // cookie corresponding to which line the error occurred on.
59  unsigned LocCookie = 0;
60  if (LocInfo) {
61  unsigned ErrorLine = Diag.getLineNo()-1;
62  if (ErrorLine >= LocInfo->getNumOperands())
63  ErrorLine = 0;
64 
65  if (LocInfo->getNumOperands() != 0)
66  if (const ConstantInt *CI =
67  mdconst::dyn_extract<ConstantInt>(LocInfo->getOperand(ErrorLine)))
68  LocCookie = CI->getZExtValue();
69  }
70 
71  DiagInfo->DiagHandler(Diag, DiagInfo->DiagContext, LocCookie);
72 }
73 
74 /// EmitInlineAsm - Emit a blob of inline asm to the output streamer.
75 void AsmPrinter::EmitInlineAsm(StringRef Str, const MCSubtargetInfo &STI,
76  const MCTargetOptions &MCOptions,
77  const MDNode *LocMDNode,
78  InlineAsm::AsmDialect Dialect) const {
79  assert(!Str.empty() && "Can't emit empty inline asm block");
80 
81  // Remember if the buffer is nul terminated or not so we can avoid a copy.
82  bool isNullTerminated = Str.back() == 0;
83  if (isNullTerminated)
84  Str = Str.substr(0, Str.size()-1);
85 
86  // If the output streamer does not have mature MC support or the integrated
87  // assembler has been disabled, just emit the blob textually.
88  // Otherwise parse the asm and emit it via MC support.
89  // This is useful in case the asm parser doesn't handle something but the
90  // system assembler does.
91  const MCAsmInfo *MCAI = TM.getMCAsmInfo();
92  assert(MCAI && "No MCAsmInfo");
93  if (!MCAI->useIntegratedAssembler() &&
94  !OutStreamer->isIntegratedAssemblerRequired()) {
96  OutStreamer->EmitRawText(Str);
97  emitInlineAsmEnd(STI, nullptr);
98  return;
99  }
100 
101  if (!DiagInfo) {
102  DiagInfo = make_unique<SrcMgrDiagInfo>();
103 
105  Context.setInlineSourceManager(&DiagInfo->SrcMgr);
106 
107  LLVMContext &LLVMCtx = MMI->getModule()->getContext();
108  if (LLVMCtx.getInlineAsmDiagnosticHandler()) {
109  DiagInfo->DiagHandler = LLVMCtx.getInlineAsmDiagnosticHandler();
110  DiagInfo->DiagContext = LLVMCtx.getInlineAsmDiagnosticContext();
111  DiagInfo->SrcMgr.setDiagHandler(srcMgrDiagHandler, DiagInfo.get());
112  }
113  }
114 
115  SourceMgr &SrcMgr = DiagInfo->SrcMgr;
116  SrcMgr.setIncludeDirs(MCOptions.IASSearchPaths);
117 
118  std::unique_ptr<MemoryBuffer> Buffer;
119  // The inline asm source manager will outlive Str, so make a copy of the
120  // string for SourceMgr to own.
121  Buffer = MemoryBuffer::getMemBufferCopy(Str, "<inline asm>");
122 
123  // Tell SrcMgr about this buffer, it takes ownership of the buffer.
124  unsigned BufNum = SrcMgr.AddNewSourceBuffer(std::move(Buffer), SMLoc());
125 
126  // Store LocMDNode in DiagInfo, using BufNum as an identifier.
127  if (LocMDNode) {
128  DiagInfo->LocInfos.resize(BufNum);
129  DiagInfo->LocInfos[BufNum-1] = LocMDNode;
130  }
131 
132  std::unique_ptr<MCAsmParser> Parser(
133  createMCAsmParser(SrcMgr, OutContext, *OutStreamer, *MAI, BufNum));
134 
135  // We create a new MCInstrInfo here since we might be at the module level
136  // and not have a MachineFunction to initialize the TargetInstrInfo from and
137  // we only need MCInstrInfo for asm parsing. We create one unconditionally
138  // because it's not subtarget dependent.
139  std::unique_ptr<MCInstrInfo> MII(TM.getTarget().createMCInstrInfo());
140  std::unique_ptr<MCTargetAsmParser> TAP(TM.getTarget().createMCAsmParser(
141  STI, *Parser, *MII, MCOptions));
142  if (!TAP)
143  report_fatal_error("Inline asm not supported by this streamer because"
144  " we don't have an asm parser for this target\n");
145  Parser->setAssemblerDialect(Dialect);
146  Parser->setTargetParser(*TAP.get());
147  Parser->setEnablePrintSchedInfo(EnablePrintSchedInfo);
148  if (Dialect == InlineAsm::AD_Intel)
149  // We need this flag to be able to parse numbers like "0bH"
150  Parser->setParsingInlineAsm(true);
151  if (MF) {
153  TAP->SetFrameRegister(TRI->getFrameRegister(*MF));
154  }
155 
157  // Don't implicitly switch to the text section before the asm.
158  int Res = Parser->Run(/*NoInitialTextSection*/ true,
159  /*NoFinalize*/ true);
160  emitInlineAsmEnd(STI, &TAP->getSTI());
161 
162  if (Res && !DiagInfo->DiagHandler)
163  report_fatal_error("Error parsing inline asm\n");
164 }
165 
166 static void EmitMSInlineAsmStr(const char *AsmStr, const MachineInstr *MI,
167  MachineModuleInfo *MMI, int InlineAsmVariant,
168  AsmPrinter *AP, unsigned LocCookie,
169  raw_ostream &OS) {
170  // Switch to the inline assembly variant.
171  OS << "\t.intel_syntax\n\t";
172 
173  const char *LastEmitted = AsmStr; // One past the last character emitted.
174  unsigned NumOperands = MI->getNumOperands();
175 
176  while (*LastEmitted) {
177  switch (*LastEmitted) {
178  default: {
179  // Not a special case, emit the string section literally.
180  const char *LiteralEnd = LastEmitted+1;
181  while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
182  *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
183  ++LiteralEnd;
184 
185  OS.write(LastEmitted, LiteralEnd-LastEmitted);
186  LastEmitted = LiteralEnd;
187  break;
188  }
189  case '\n':
190  ++LastEmitted; // Consume newline character.
191  OS << '\n'; // Indent code with newline.
192  break;
193  case '$': {
194  ++LastEmitted; // Consume '$' character.
195  bool Done = true;
196 
197  // Handle escapes.
198  switch (*LastEmitted) {
199  default: Done = false; break;
200  case '$':
201  ++LastEmitted; // Consume second '$' character.
202  break;
203  }
204  if (Done) break;
205 
206  // If we have ${:foo}, then this is not a real operand reference, it is a
207  // "magic" string reference, just like in .td files. Arrange to call
208  // PrintSpecial.
209  if (LastEmitted[0] == '{' && LastEmitted[1] == ':') {
210  LastEmitted += 2;
211  const char *StrStart = LastEmitted;
212  const char *StrEnd = strchr(StrStart, '}');
213  if (!StrEnd)
214  report_fatal_error("Unterminated ${:foo} operand in inline asm"
215  " string: '" + Twine(AsmStr) + "'");
216 
217  std::string Val(StrStart, StrEnd);
218  AP->PrintSpecial(MI, OS, Val.c_str());
219  LastEmitted = StrEnd+1;
220  break;
221  }
222 
223  const char *IDStart = LastEmitted;
224  const char *IDEnd = IDStart;
225  while (*IDEnd >= '0' && *IDEnd <= '9') ++IDEnd;
226 
227  unsigned Val;
228  if (StringRef(IDStart, IDEnd-IDStart).getAsInteger(10, Val))
229  report_fatal_error("Bad $ operand number in inline asm string: '" +
230  Twine(AsmStr) + "'");
231  LastEmitted = IDEnd;
232 
233  if (Val >= NumOperands-1)
234  report_fatal_error("Invalid $ operand number in inline asm string: '" +
235  Twine(AsmStr) + "'");
236 
237  // Okay, we finally have a value number. Ask the target to print this
238  // operand!
239  unsigned OpNo = InlineAsm::MIOp_FirstOperand;
240 
241  bool Error = false;
242 
243  // Scan to find the machine operand number for the operand.
244  for (; Val; --Val) {
245  if (OpNo >= MI->getNumOperands()) break;
246  unsigned OpFlags = MI->getOperand(OpNo).getImm();
247  OpNo += InlineAsm::getNumOperandRegisters(OpFlags) + 1;
248  }
249 
250  // We may have a location metadata attached to the end of the
251  // instruction, and at no point should see metadata at any
252  // other point while processing. It's an error if so.
253  if (OpNo >= MI->getNumOperands() ||
254  MI->getOperand(OpNo).isMetadata()) {
255  Error = true;
256  } else {
257  unsigned OpFlags = MI->getOperand(OpNo).getImm();
258  ++OpNo; // Skip over the ID number.
259 
260  if (InlineAsm::isMemKind(OpFlags)) {
261  Error = AP->PrintAsmMemoryOperand(MI, OpNo, InlineAsmVariant,
262  /*Modifier*/ nullptr, OS);
263  } else {
264  Error = AP->PrintAsmOperand(MI, OpNo, InlineAsmVariant,
265  /*Modifier*/ nullptr, OS);
266  }
267  }
268  if (Error) {
269  std::string msg;
270  raw_string_ostream Msg(msg);
271  Msg << "invalid operand in inline asm: '" << AsmStr << "'";
272  MMI->getModule()->getContext().emitError(LocCookie, Msg.str());
273  }
274  break;
275  }
276  }
277  }
278  OS << "\n\t.att_syntax\n" << (char)0; // null terminate string.
279 }
280 
281 static void EmitGCCInlineAsmStr(const char *AsmStr, const MachineInstr *MI,
282  MachineModuleInfo *MMI, int InlineAsmVariant,
283  int AsmPrinterVariant, AsmPrinter *AP,
284  unsigned LocCookie, raw_ostream &OS) {
285  int CurVariant = -1; // The number of the {.|.|.} region we are in.
286  const char *LastEmitted = AsmStr; // One past the last character emitted.
287  unsigned NumOperands = MI->getNumOperands();
288 
289  OS << '\t';
290 
291  while (*LastEmitted) {
292  switch (*LastEmitted) {
293  default: {
294  // Not a special case, emit the string section literally.
295  const char *LiteralEnd = LastEmitted+1;
296  while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
297  *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
298  ++LiteralEnd;
299  if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
300  OS.write(LastEmitted, LiteralEnd-LastEmitted);
301  LastEmitted = LiteralEnd;
302  break;
303  }
304  case '\n':
305  ++LastEmitted; // Consume newline character.
306  OS << '\n'; // Indent code with newline.
307  break;
308  case '$': {
309  ++LastEmitted; // Consume '$' character.
310  bool Done = true;
311 
312  // Handle escapes.
313  switch (*LastEmitted) {
314  default: Done = false; break;
315  case '$': // $$ -> $
316  if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
317  OS << '$';
318  ++LastEmitted; // Consume second '$' character.
319  break;
320  case '(': // $( -> same as GCC's { character.
321  ++LastEmitted; // Consume '(' character.
322  if (CurVariant != -1)
323  report_fatal_error("Nested variants found in inline asm string: '" +
324  Twine(AsmStr) + "'");
325  CurVariant = 0; // We're in the first variant now.
326  break;
327  case '|':
328  ++LastEmitted; // consume '|' character.
329  if (CurVariant == -1)
330  OS << '|'; // this is gcc's behavior for | outside a variant
331  else
332  ++CurVariant; // We're in the next variant.
333  break;
334  case ')': // $) -> same as GCC's } char.
335  ++LastEmitted; // consume ')' character.
336  if (CurVariant == -1)
337  OS << '}'; // this is gcc's behavior for } outside a variant
338  else
339  CurVariant = -1;
340  break;
341  }
342  if (Done) break;
343 
344  bool HasCurlyBraces = false;
345  if (*LastEmitted == '{') { // ${variable}
346  ++LastEmitted; // Consume '{' character.
347  HasCurlyBraces = true;
348  }
349 
350  // If we have ${:foo}, then this is not a real operand reference, it is a
351  // "magic" string reference, just like in .td files. Arrange to call
352  // PrintSpecial.
353  if (HasCurlyBraces && *LastEmitted == ':') {
354  ++LastEmitted;
355  const char *StrStart = LastEmitted;
356  const char *StrEnd = strchr(StrStart, '}');
357  if (!StrEnd)
358  report_fatal_error("Unterminated ${:foo} operand in inline asm"
359  " string: '" + Twine(AsmStr) + "'");
360 
361  std::string Val(StrStart, StrEnd);
362  AP->PrintSpecial(MI, OS, Val.c_str());
363  LastEmitted = StrEnd+1;
364  break;
365  }
366 
367  const char *IDStart = LastEmitted;
368  const char *IDEnd = IDStart;
369  while (*IDEnd >= '0' && *IDEnd <= '9') ++IDEnd;
370 
371  unsigned Val;
372  if (StringRef(IDStart, IDEnd-IDStart).getAsInteger(10, Val))
373  report_fatal_error("Bad $ operand number in inline asm string: '" +
374  Twine(AsmStr) + "'");
375  LastEmitted = IDEnd;
376 
377  char Modifier[2] = { 0, 0 };
378 
379  if (HasCurlyBraces) {
380  // If we have curly braces, check for a modifier character. This
381  // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
382  if (*LastEmitted == ':') {
383  ++LastEmitted; // Consume ':' character.
384  if (*LastEmitted == 0)
385  report_fatal_error("Bad ${:} expression in inline asm string: '" +
386  Twine(AsmStr) + "'");
387 
388  Modifier[0] = *LastEmitted;
389  ++LastEmitted; // Consume modifier character.
390  }
391 
392  if (*LastEmitted != '}')
393  report_fatal_error("Bad ${} expression in inline asm string: '" +
394  Twine(AsmStr) + "'");
395  ++LastEmitted; // Consume '}' character.
396  }
397 
398  if (Val >= NumOperands-1)
399  report_fatal_error("Invalid $ operand number in inline asm string: '" +
400  Twine(AsmStr) + "'");
401 
402  // Okay, we finally have a value number. Ask the target to print this
403  // operand!
404  if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
405  unsigned OpNo = InlineAsm::MIOp_FirstOperand;
406 
407  bool Error = false;
408 
409  // Scan to find the machine operand number for the operand.
410  for (; Val; --Val) {
411  if (OpNo >= MI->getNumOperands()) break;
412  unsigned OpFlags = MI->getOperand(OpNo).getImm();
413  OpNo += InlineAsm::getNumOperandRegisters(OpFlags) + 1;
414  }
415 
416  // We may have a location metadata attached to the end of the
417  // instruction, and at no point should see metadata at any
418  // other point while processing. It's an error if so.
419  if (OpNo >= MI->getNumOperands() ||
420  MI->getOperand(OpNo).isMetadata()) {
421  Error = true;
422  } else {
423  unsigned OpFlags = MI->getOperand(OpNo).getImm();
424  ++OpNo; // Skip over the ID number.
425 
426  if (Modifier[0] == 'l') { // Labels are target independent.
427  // FIXME: What if the operand isn't an MBB, report error?
428  const MCSymbol *Sym = MI->getOperand(OpNo).getMBB()->getSymbol();
429  Sym->print(OS, AP->MAI);
430  } else {
431  if (InlineAsm::isMemKind(OpFlags)) {
432  Error = AP->PrintAsmMemoryOperand(MI, OpNo, InlineAsmVariant,
433  Modifier[0] ? Modifier : nullptr,
434  OS);
435  } else {
436  Error = AP->PrintAsmOperand(MI, OpNo, InlineAsmVariant,
437  Modifier[0] ? Modifier : nullptr, OS);
438  }
439  }
440  }
441  if (Error) {
442  std::string msg;
443  raw_string_ostream Msg(msg);
444  Msg << "invalid operand in inline asm: '" << AsmStr << "'";
445  MMI->getModule()->getContext().emitError(LocCookie, Msg.str());
446  }
447  }
448  break;
449  }
450  }
451  }
452  OS << '\n' << (char)0; // null terminate string.
453 }
454 
455 /// EmitInlineAsm - This method formats and emits the specified machine
456 /// instruction that is an inline asm.
457 void AsmPrinter::EmitInlineAsm(const MachineInstr *MI) const {
458  assert(MI->isInlineAsm() && "printInlineAsm only works on inline asms");
459 
460  // Count the number of register definitions to find the asm string.
461  unsigned NumDefs = 0;
462  for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef();
463  ++NumDefs)
464  assert(NumDefs != MI->getNumOperands()-2 && "No asm string?");
465 
466  assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?");
467 
468  // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
469  const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
470 
471  // If this asmstr is empty, just print the #APP/#NOAPP markers.
472  // These are useful to see where empty asm's wound up.
473  if (AsmStr[0] == 0) {
474  OutStreamer->emitRawComment(MAI->getInlineAsmStart());
475  OutStreamer->emitRawComment(MAI->getInlineAsmEnd());
476  return;
477  }
478 
479  // Emit the #APP start marker. This has to happen even if verbose-asm isn't
480  // enabled, so we use emitRawComment.
481  OutStreamer->emitRawComment(MAI->getInlineAsmStart());
482 
483  // Get the !srcloc metadata node if we have it, and decode the loc cookie from
484  // it.
485  unsigned LocCookie = 0;
486  const MDNode *LocMD = nullptr;
487  for (unsigned i = MI->getNumOperands(); i != 0; --i) {
488  if (MI->getOperand(i-1).isMetadata() &&
489  (LocMD = MI->getOperand(i-1).getMetadata()) &&
490  LocMD->getNumOperands() != 0) {
491  if (const ConstantInt *CI =
492  mdconst::dyn_extract<ConstantInt>(LocMD->getOperand(0))) {
493  LocCookie = CI->getZExtValue();
494  break;
495  }
496  }
497  }
498 
499  // Emit the inline asm to a temporary string so we can emit it through
500  // EmitInlineAsm.
501  SmallString<256> StringData;
502  raw_svector_ostream OS(StringData);
503 
504  // The variant of the current asmprinter.
505  int AsmPrinterVariant = MAI->getAssemblerDialect();
506  InlineAsm::AsmDialect InlineAsmVariant = MI->getInlineAsmDialect();
507  AsmPrinter *AP = const_cast<AsmPrinter*>(this);
508  if (InlineAsmVariant == InlineAsm::AD_ATT)
509  EmitGCCInlineAsmStr(AsmStr, MI, MMI, InlineAsmVariant, AsmPrinterVariant,
510  AP, LocCookie, OS);
511  else
512  EmitMSInlineAsmStr(AsmStr, MI, MMI, InlineAsmVariant, AP, LocCookie, OS);
513 
514  // Reset SanitizeAddress based on the function's attribute.
515  MCTargetOptions MCOptions = TM.Options.MCOptions;
516  MCOptions.SanitizeAddress =
517  MF->getFunction()->hasFnAttribute(Attribute::SanitizeAddress);
518 
519  EmitInlineAsm(OS.str(), getSubtargetInfo(), MCOptions, LocMD,
520  MI->getInlineAsmDialect());
521 
522  // Emit the #NOAPP end marker. This has to happen even if verbose-asm isn't
523  // enabled, so we use emitRawComment.
524  OutStreamer->emitRawComment(MAI->getInlineAsmEnd());
525 }
526 
527 
528 /// PrintSpecial - Print information related to the specified machine instr
529 /// that is independent of the operand, and may be independent of the instr
530 /// itself. This can be useful for portably encoding the comment character
531 /// or other bits of target-specific knowledge into the asmstrings. The
532 /// syntax used is ${:comment}. Targets can override this to add support
533 /// for their own strange codes.
535  const char *Code) const {
536  if (!strcmp(Code, "private")) {
537  const DataLayout &DL = MF->getDataLayout();
538  OS << DL.getPrivateGlobalPrefix();
539  } else if (!strcmp(Code, "comment")) {
540  OS << MAI->getCommentString();
541  } else if (!strcmp(Code, "uid")) {
542  // Comparing the address of MI isn't sufficient, because machineinstrs may
543  // be allocated to the same address across functions.
544 
545  // If this is a new LastFn instruction, bump the counter.
546  if (LastMI != MI || LastFn != getFunctionNumber()) {
547  ++Counter;
548  LastMI = MI;
549  LastFn = getFunctionNumber();
550  }
551  OS << Counter;
552  } else {
553  std::string msg;
554  raw_string_ostream Msg(msg);
555  Msg << "Unknown special formatter '" << Code
556  << "' for machine instr: " << *MI;
557  report_fatal_error(Msg.str());
558  }
559 }
560 
561 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
562 /// instruction, using the specified assembler variant. Targets should
563 /// override this to format as appropriate.
564 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
565  unsigned AsmVariant, const char *ExtraCode,
566  raw_ostream &O) {
567  // Does this asm operand have a single letter operand modifier?
568  if (ExtraCode && ExtraCode[0]) {
569  if (ExtraCode[1] != 0) return true; // Unknown modifier.
570 
571  const MachineOperand &MO = MI->getOperand(OpNo);
572  switch (ExtraCode[0]) {
573  default:
574  return true; // Unknown modifier.
575  case 'c': // Substitute immediate value without immediate syntax
577  return true;
578  O << MO.getImm();
579  return false;
580  case 'n': // Negate the immediate constant.
582  return true;
583  O << -MO.getImm();
584  return false;
585  case 's': // The GCC deprecated s modifier
587  return true;
588  O << ((32 - MO.getImm()) & 31);
589  return false;
590  }
591  }
592  return true;
593 }
594 
595 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
596  unsigned AsmVariant,
597  const char *ExtraCode, raw_ostream &O) {
598  // Target doesn't support this yet!
599  return true;
600 }
601 
603 
605  const MCSubtargetInfo *EndInfo) const {}
virtual void emitInlineAsmStart() const
Let the target do anything it needs to do before emitting inlineasm.
A parsed version of the target data layout string in and methods for querying it. ...
Definition: DataLayout.h:109
const char * getInlineAsmStart() const
Definition: MCAsmInfo.h:488
unsigned FindBufferContainingLoc(SMLoc Loc) const
Return the ID of the buffer containing the specified location.
Definition: SourceMgr.cpp:78
LLVMContext & Context
MachineBasicBlock * getMBB() const
std::unique_ptr< MCStreamer > OutStreamer
This is the MCStreamer object for the file we are generating.
Definition: AsmPrinter.h:92
MCTargetOptions MCOptions
Machine level options.
LLVM_ATTRIBUTE_NORETURN void report_fatal_error(Error Err, bool gen_crash_diag=true)
Report a serious error, calling any installed error handler.
Definition: Error.cpp:115
Compute iterated dominance frontiers using a linear time algorithm.
Definition: AllocatorList.h:24
SMLoc getLoc() const
Definition: SourceMgr.h:259
StringRef getPrivateGlobalPrefix() const
Definition: DataLayout.h:281
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:42
std::vector< std::string > IASSearchPaths
Additional paths to search for .include directives when using the integrated assembler.
MCContext & OutContext
This is the context for the output file that we are streaming.
Definition: AsmPrinter.h:87
virtual const TargetRegisterInfo * getRegisterInfo() const
getRegisterInfo - If register information is available, return it.
bool EnablePrintSchedInfo
Enable print [latency:throughput] in output.
Definition: AsmPrinter.h:118
const MCSubtargetInfo & getSubtargetInfo() const
Return information about subtarget.
Definition: AsmPrinter.cpp:217
LLVM_NODISCARD LLVM_ATTRIBUTE_ALWAYS_INLINE size_t size() const
size - Get the string size.
Definition: StringRef.h:138
SourceMgr SrcMgr
Definition: Error.cpp:23
bool SanitizeAddress
Enables AddressSanitizer instrumentation at machine level.
const MachineFunction * MF
The current machine function.
Definition: AsmPrinter.h:95
MCInstrInfo * createMCInstrInfo() const
createMCInstrInfo - Create a MCInstrInfo implementation.
bool isInlineAsm() const
Definition: MachineInstr.h:832
void * getInlineAsmDiagnosticContext() const
getInlineAsmDiagnosticContext - Return the diagnostic context set by setInlineAsmDiagnosticHandler.
bool hasFnAttribute(Attribute::AttrKind Kind) const
Return true if the function has the attribute.
Definition: Function.h:262
A raw_ostream that writes to an SmallVector or SmallString.
Definition: raw_ostream.h:489
bool isMetadata() const
isMetadata - Tests if this is a MO_Metadata operand.
Metadata node.
Definition: Metadata.h:862
const MDOperand & getOperand(unsigned I) const
Definition: Metadata.h:1067
const char * getInlineAsmEnd() const
Definition: MCAsmInfo.h:489
LLVMContext::InlineAsmDiagHandlerTy DiagHandler
Definition: AsmPrinter.h:159
MCAsmParser * createMCAsmParser(SourceMgr &, MCContext &, MCStreamer &, const MCAsmInfo &, unsigned CB=0)
Create an MCAsmParser instance.
Definition: AsmParser.cpp:5830
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:81
unsigned getNumOperands() const
Access to explicit operands of the instruction.
Definition: MachineInstr.h:293
LLVMContext & getContext() const
Get the global data context.
Definition: Module.h:237
int getLineNo() const
Definition: SourceMgr.h:261
const char * getSymbolName() const
virtual unsigned getFrameRegister(const MachineFunction &MF) const =0
Debug information queries.
Context object for machine code objects.
Definition: MCContext.h:59
void emitError(unsigned LocCookie, const Twine &ErrorStr)
emitError - Emit an error message to the currently installed error handler with optional location inf...
const MCContext & getContext() const
unsigned AddNewSourceBuffer(std::unique_ptr< MemoryBuffer > F, SMLoc IncludeLoc)
Add a new source buffer to this source manager.
Definition: SourceMgr.h:125
LLVM_NODISCARD LLVM_ATTRIBUTE_ALWAYS_INLINE bool empty() const
empty - Check if the string is empty.
Definition: StringRef.h:133
virtual bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo, unsigned AsmVariant, const char *ExtraCode, raw_ostream &OS)
Print the specified operand of MI, an INLINEASM instruction, using the specified assembler variant as...
LLVM_NODISCARD LLVM_ATTRIBUTE_ALWAYS_INLINE StringRef substr(size_t Start, size_t N=npos) const
Return a reference to the substring from [Start, Start + N).
Definition: StringRef.h:598
MachineModuleInfo * MMI
This is a pointer to the current MachineModuleInfo.
Definition: AsmPrinter.h:98
const DataLayout & getDataLayout() const
Return the DataLayout attached to the Module associated to this MF.
This class is intended to be used as a base class for asm properties and features specific to the tar...
Definition: MCAsmInfo.h:56
void setInlineSourceManager(SourceMgr *SM)
Definition: MCContext.h:281
* if(!EatIfPresent(lltok::kw_thread_local)) return false
ParseOptionalThreadLocal := /*empty.
const MCAsmInfo * MAI
Target Asm Printer information.
Definition: AsmPrinter.h:83
const TargetSubtargetInfo & getSubtarget() const
getSubtarget - Return the subtarget for which this machine code is being compiled.
This is an important class for using LLVM in a threaded context.
Definition: LLVMContext.h:69
unsigned getAssemblerDialect() const
Definition: MCAsmInfo.h:493
This file contains the declarations for the subclasses of Constant, which represent the different fla...
virtual bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo, unsigned AsmVariant, const char *ExtraCode, raw_ostream &OS)
Print the specified operand of MI, an INLINEASM instruction, using the specified assembler variant...
const MCAsmInfo * getMCAsmInfo() const
Return target specific asm information.
TargetMachine & TM
Target machine description.
Definition: AsmPrinter.h:80
This class is intended to be used as a driving class for all asm writers.
Definition: AsmPrinter.h:77
static unsigned getNumOperandRegisters(unsigned Flag)
getNumOperandRegisters - Extract the number of registers field from the inline asm operand flag...
Definition: InlineAsm.h:336
StringRef getCommentString() const
Definition: MCAsmInfo.h:470
static void srcMgrDiagHandler(const SMDiagnostic &Diag, void *diagInfo)
srcMgrDiagHandler - This callback is invoked when the SourceMgr for an inline asm has an error in it...
This owns the files read by a parser, handles include stacks, and handles diagnostic wrangling...
Definition: SourceMgr.h:41
const Target & getTarget() const
static bool isMemKind(unsigned Flag)
Definition: InlineAsm.h:277
MCTargetAsmParser * createMCAsmParser(const MCSubtargetInfo &STI, MCAsmParser &Parser, const MCInstrInfo &MII, const MCTargetOptions &Options) const
createMCAsmParser - Create a target specific assembly parser.
TargetRegisterInfo base class - We assume that the target defines a static array of TargetRegisterDes...
LLVM_NODISCARD char back() const
back - Get the last character in the string.
Definition: StringRef.h:149
std::string & str()
Flushes the stream contents to the target string and returns the string&#39;s reference.
Definition: raw_ostream.h:478
raw_ostream & write(unsigned char C)
std::enable_if< std::numeric_limits< T >::is_signed, bool >::type getAsInteger(unsigned Radix, T &Result) const
Parse the current string as an integer of the specified radix.
Definition: StringRef.h:497
unsigned getFunctionNumber() const
Return a unique ID for the current function.
Definition: AsmPrinter.cpp:201
InlineAsm::AsmDialect getInlineAsmDialect() const
This is the shared class of boolean and integer constants.
Definition: Constants.h:84
MachineOperand class - Representation of each machine instruction operand.
Module.h This file contains the declarations for the Module class.
virtual void emitInlineAsmEnd(const MCSubtargetInfo &StartInfo, const MCSubtargetInfo *EndInfo) const
Let the target do anything it needs to do after emitting inlineasm.
StringRef str()
Return a StringRef for the vector contents.
Definition: raw_ostream.h:514
int64_t getImm() const
static std::unique_ptr< MemoryBuffer > getMemBufferCopy(StringRef InputData, const Twine &BufferName="")
Open the specified memory range as a MemoryBuffer, copying the contents and taking ownership of it...
bool useIntegratedAssembler() const
Return true if assembly (inline or otherwise) should be parsed.
Definition: MCAsmInfo.h:591
Representation of each machine instruction.
Definition: MachineInstr.h:59
TargetOptions Options
Definition: TargetMachine.h:96
MCSymbol * getSymbol() const
Return the MCSymbol for this basic block.
MCSubtargetInfo - Generic base class for all target subtargets.
InlineAsmDiagHandlerTy getInlineAsmDiagnosticHandler() const
getInlineAsmDiagnosticHandler - Return the diagnostic handler set by setInlineAsmDiagnosticHandler.
bool isSymbol() const
isSymbol - Tests if this is a MO_ExternalSymbol operand.
const Module * getModule() const
bool isReg() const
isReg - Tests if this is a MO_Register operand.
const Function * getFunction() const
getFunction - Return the LLVM function that this machine code represents
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
A raw_ostream that writes to an std::string.
Definition: raw_ostream.h:462
static void EmitGCCInlineAsmStr(const char *AsmStr, const MachineInstr *MI, MachineModuleInfo *MMI, int InlineAsmVariant, int AsmPrinterVariant, AsmPrinter *AP, unsigned LocCookie, raw_ostream &OS)
Lightweight error class with error context and mandatory checking.
Definition: Error.h:156
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:44
void setIncludeDirs(const std::vector< std::string > &Dirs)
Definition: SourceMgr.h:85
IRTranslator LLVM IR MI
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:49
static void EmitMSInlineAsmStr(const char *AsmStr, const MachineInstr *MI, MachineModuleInfo *MMI, int InlineAsmVariant, AsmPrinter *AP, unsigned LocCookie, raw_ostream &OS)
std::vector< const MDNode * > LocInfos
Definition: AsmPrinter.h:158
Represents a location in source code.
Definition: SMLoc.h:24
unsigned getNumOperands() const
Return number of MDNode operands.
Definition: Metadata.h:1073
const MachineOperand & getOperand(unsigned i) const
Definition: MachineInstr.h:295
MachineOperandType getType() const
getType - Returns the MachineOperandType for this operand.
virtual void PrintSpecial(const MachineInstr *MI, raw_ostream &OS, const char *Code) const
Print information related to the specified machine instr that is independent of the operand...
const MDNode * getMetadata() const
This class contains meta information specific to a module.
Instances of this class encapsulate one diagnostic report, allowing printing to a raw_ostream as a ca...
Definition: SourceMgr.h:233
void print(raw_ostream &OS, const MCAsmInfo *MAI) const
print - Print the value to the stream OS.
Definition: MCSymbol.cpp:59