clang  6.0.0svn
CodeGenAction.cpp
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1 //===--- CodeGenAction.cpp - LLVM Code Generation Frontend Action ---------===//
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 
11 #include "CodeGenModule.h"
12 #include "CoverageMappingGen.h"
13 #include "MacroPPCallbacks.h"
14 #include "clang/AST/ASTConsumer.h"
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/DeclCXX.h"
17 #include "clang/AST/DeclGroup.h"
20 #include "clang/Basic/TargetInfo.h"
25 #include "clang/Lex/Preprocessor.h"
26 #include "llvm/Bitcode/BitcodeReader.h"
27 #include "llvm/CodeGen/MachineOptimizationRemarkEmitter.h"
28 #include "llvm/IR/DebugInfo.h"
29 #include "llvm/IR/DiagnosticInfo.h"
30 #include "llvm/IR/DiagnosticPrinter.h"
31 #include "llvm/IR/GlobalValue.h"
32 #include "llvm/IR/LLVMContext.h"
33 #include "llvm/IR/Module.h"
34 #include "llvm/IRReader/IRReader.h"
35 #include "llvm/Linker/Linker.h"
36 #include "llvm/Pass.h"
37 #include "llvm/Support/MemoryBuffer.h"
38 #include "llvm/Support/SourceMgr.h"
39 #include "llvm/Support/Timer.h"
40 #include "llvm/Support/ToolOutputFile.h"
41 #include "llvm/Support/YAMLTraits.h"
42 #include "llvm/Transforms/IPO/Internalize.h"
43 
44 #include <memory>
45 using namespace clang;
46 using namespace llvm;
47 
48 namespace clang {
49  class BackendConsumer;
51  public:
53  : CodeGenOpts(CGOpts), BackendCon(BCon) {}
54 
55  bool handleDiagnostics(const DiagnosticInfo &DI) override;
56 
57  bool isAnalysisRemarkEnabled(StringRef PassName) const override {
58  return (CodeGenOpts.OptimizationRemarkAnalysisPattern &&
59  CodeGenOpts.OptimizationRemarkAnalysisPattern->match(PassName));
60  }
61  bool isMissedOptRemarkEnabled(StringRef PassName) const override {
62  return (CodeGenOpts.OptimizationRemarkMissedPattern &&
63  CodeGenOpts.OptimizationRemarkMissedPattern->match(PassName));
64  }
65  bool isPassedOptRemarkEnabled(StringRef PassName) const override {
66  return (CodeGenOpts.OptimizationRemarkPattern &&
67  CodeGenOpts.OptimizationRemarkPattern->match(PassName));
68  }
69 
70  bool isAnyRemarkEnabled() const override {
71  return (CodeGenOpts.OptimizationRemarkAnalysisPattern ||
72  CodeGenOpts.OptimizationRemarkMissedPattern ||
73  CodeGenOpts.OptimizationRemarkPattern);
74  }
75 
76  private:
77  const CodeGenOptions &CodeGenOpts;
78  BackendConsumer *BackendCon;
79  };
80 
81  class BackendConsumer : public ASTConsumer {
82  using LinkModule = CodeGenAction::LinkModule;
83 
84  virtual void anchor();
85  DiagnosticsEngine &Diags;
86  BackendAction Action;
87  const HeaderSearchOptions &HeaderSearchOpts;
88  const CodeGenOptions &CodeGenOpts;
89  const TargetOptions &TargetOpts;
90  const LangOptions &LangOpts;
91  std::unique_ptr<raw_pwrite_stream> AsmOutStream;
92  ASTContext *Context;
93 
94  Timer LLVMIRGeneration;
95  unsigned LLVMIRGenerationRefCount;
96 
97  /// True if we've finished generating IR. This prevents us from generating
98  /// additional LLVM IR after emitting output in HandleTranslationUnit. This
99  /// can happen when Clang plugins trigger additional AST deserialization.
100  bool IRGenFinished = false;
101 
102  std::unique_ptr<CodeGenerator> Gen;
103 
104  SmallVector<LinkModule, 4> LinkModules;
105 
106  // This is here so that the diagnostic printer knows the module a diagnostic
107  // refers to.
108  llvm::Module *CurLinkModule = nullptr;
109 
110  public:
112  const HeaderSearchOptions &HeaderSearchOpts,
113  const PreprocessorOptions &PPOpts,
114  const CodeGenOptions &CodeGenOpts,
115  const TargetOptions &TargetOpts,
116  const LangOptions &LangOpts, bool TimePasses,
117  const std::string &InFile,
118  SmallVector<LinkModule, 4> LinkModules,
119  std::unique_ptr<raw_pwrite_stream> OS, LLVMContext &C,
120  CoverageSourceInfo *CoverageInfo = nullptr)
121  : Diags(Diags), Action(Action), HeaderSearchOpts(HeaderSearchOpts),
122  CodeGenOpts(CodeGenOpts), TargetOpts(TargetOpts), LangOpts(LangOpts),
123  AsmOutStream(std::move(OS)), Context(nullptr),
124  LLVMIRGeneration("irgen", "LLVM IR Generation Time"),
125  LLVMIRGenerationRefCount(0),
126  Gen(CreateLLVMCodeGen(Diags, InFile, HeaderSearchOpts, PPOpts,
127  CodeGenOpts, C, CoverageInfo)),
128  LinkModules(std::move(LinkModules)) {
129  llvm::TimePassesIsEnabled = TimePasses;
130  }
131  llvm::Module *getModule() const { return Gen->GetModule(); }
132  std::unique_ptr<llvm::Module> takeModule() {
133  return std::unique_ptr<llvm::Module>(Gen->ReleaseModule());
134  }
135 
136  CodeGenerator *getCodeGenerator() { return Gen.get(); }
137 
139  Gen->HandleCXXStaticMemberVarInstantiation(VD);
140  }
141 
142  void Initialize(ASTContext &Ctx) override {
143  assert(!Context && "initialized multiple times");
144 
145  Context = &Ctx;
146 
147  if (llvm::TimePassesIsEnabled)
148  LLVMIRGeneration.startTimer();
149 
150  Gen->Initialize(Ctx);
151 
152  if (llvm::TimePassesIsEnabled)
153  LLVMIRGeneration.stopTimer();
154  }
155 
156  bool HandleTopLevelDecl(DeclGroupRef D) override {
157  PrettyStackTraceDecl CrashInfo(*D.begin(), SourceLocation(),
158  Context->getSourceManager(),
159  "LLVM IR generation of declaration");
160 
161  // Recurse.
162  if (llvm::TimePassesIsEnabled) {
163  LLVMIRGenerationRefCount += 1;
164  if (LLVMIRGenerationRefCount == 1)
165  LLVMIRGeneration.startTimer();
166  }
167 
168  Gen->HandleTopLevelDecl(D);
169 
170  if (llvm::TimePassesIsEnabled) {
171  LLVMIRGenerationRefCount -= 1;
172  if (LLVMIRGenerationRefCount == 0)
173  LLVMIRGeneration.stopTimer();
174  }
175 
176  return true;
177  }
178 
180  PrettyStackTraceDecl CrashInfo(D, SourceLocation(),
181  Context->getSourceManager(),
182  "LLVM IR generation of inline function");
183  if (llvm::TimePassesIsEnabled)
184  LLVMIRGeneration.startTimer();
185 
186  Gen->HandleInlineFunctionDefinition(D);
187 
188  if (llvm::TimePassesIsEnabled)
189  LLVMIRGeneration.stopTimer();
190  }
191 
193  // Ignore interesting decls from the AST reader after IRGen is finished.
194  if (!IRGenFinished)
195  HandleTopLevelDecl(D);
196  }
197 
198  // Links each entry in LinkModules into our module. Returns true on error.
199  bool LinkInModules() {
200  for (auto &LM : LinkModules) {
201  if (LM.PropagateAttrs)
202  for (Function &F : *LM.Module)
203  Gen->CGM().AddDefaultFnAttrs(F);
204 
205  CurLinkModule = LM.Module.get();
206 
207  bool Err;
208  if (LM.Internalize) {
209  Err = Linker::linkModules(
210  *getModule(), std::move(LM.Module), LM.LinkFlags,
211  [](llvm::Module &M, const llvm::StringSet<> &GVS) {
212  internalizeModule(M, [&GVS](const llvm::GlobalValue &GV) {
213  return !GV.hasName() || (GVS.count(GV.getName()) == 0);
214  });
215  });
216  } else {
217  Err = Linker::linkModules(*getModule(), std::move(LM.Module),
218  LM.LinkFlags);
219  }
220 
221  if (Err)
222  return true;
223  }
224  return false; // success
225  }
226 
228  {
229  PrettyStackTraceString CrashInfo("Per-file LLVM IR generation");
230  if (llvm::TimePassesIsEnabled) {
231  LLVMIRGenerationRefCount += 1;
232  if (LLVMIRGenerationRefCount == 1)
233  LLVMIRGeneration.startTimer();
234  }
235 
236  Gen->HandleTranslationUnit(C);
237 
238  if (llvm::TimePassesIsEnabled) {
239  LLVMIRGenerationRefCount -= 1;
240  if (LLVMIRGenerationRefCount == 0)
241  LLVMIRGeneration.stopTimer();
242  }
243 
244  IRGenFinished = true;
245  }
246 
247  // Silently ignore if we weren't initialized for some reason.
248  if (!getModule())
249  return;
250 
251  // Install an inline asm handler so that diagnostics get printed through
252  // our diagnostics hooks.
253  LLVMContext &Ctx = getModule()->getContext();
254  LLVMContext::InlineAsmDiagHandlerTy OldHandler =
255  Ctx.getInlineAsmDiagnosticHandler();
256  void *OldContext = Ctx.getInlineAsmDiagnosticContext();
257  Ctx.setInlineAsmDiagnosticHandler(InlineAsmDiagHandler, this);
258 
259  std::unique_ptr<DiagnosticHandler> OldDiagnosticHandler =
260  Ctx.getDiagnosticHandler();
261  Ctx.setDiagnosticHandler(llvm::make_unique<ClangDiagnosticHandler>(
262  CodeGenOpts, this));
263  Ctx.setDiagnosticsHotnessRequested(CodeGenOpts.DiagnosticsWithHotness);
264  if (CodeGenOpts.DiagnosticsHotnessThreshold != 0)
265  Ctx.setDiagnosticsHotnessThreshold(
266  CodeGenOpts.DiagnosticsHotnessThreshold);
267 
268  std::unique_ptr<llvm::ToolOutputFile> OptRecordFile;
269  if (!CodeGenOpts.OptRecordFile.empty()) {
270  std::error_code EC;
271  OptRecordFile = llvm::make_unique<llvm::ToolOutputFile>(
272  CodeGenOpts.OptRecordFile, EC, sys::fs::F_None);
273  if (EC) {
274  Diags.Report(diag::err_cannot_open_file) <<
275  CodeGenOpts.OptRecordFile << EC.message();
276  return;
277  }
278 
279  Ctx.setDiagnosticsOutputFile(
280  llvm::make_unique<yaml::Output>(OptRecordFile->os()));
281 
282  if (CodeGenOpts.getProfileUse() != CodeGenOptions::ProfileNone)
283  Ctx.setDiagnosticsHotnessRequested(true);
284  }
285 
286  // Link each LinkModule into our module.
287  if (LinkInModules())
288  return;
289 
290  EmbedBitcode(getModule(), CodeGenOpts, llvm::MemoryBufferRef());
291 
292  EmitBackendOutput(Diags, HeaderSearchOpts, CodeGenOpts, TargetOpts,
293  LangOpts, C.getTargetInfo().getDataLayout(),
294  getModule(), Action, std::move(AsmOutStream));
295 
296  Ctx.setInlineAsmDiagnosticHandler(OldHandler, OldContext);
297 
298  Ctx.setDiagnosticHandler(std::move(OldDiagnosticHandler));
299 
300  if (OptRecordFile)
301  OptRecordFile->keep();
302  }
303 
304  void HandleTagDeclDefinition(TagDecl *D) override {
305  PrettyStackTraceDecl CrashInfo(D, SourceLocation(),
306  Context->getSourceManager(),
307  "LLVM IR generation of declaration");
308  Gen->HandleTagDeclDefinition(D);
309  }
310 
311  void HandleTagDeclRequiredDefinition(const TagDecl *D) override {
312  Gen->HandleTagDeclRequiredDefinition(D);
313  }
314 
316  Gen->CompleteTentativeDefinition(D);
317  }
318 
320  Gen->AssignInheritanceModel(RD);
321  }
322 
323  void HandleVTable(CXXRecordDecl *RD) override {
324  Gen->HandleVTable(RD);
325  }
326 
327  static void InlineAsmDiagHandler(const llvm::SMDiagnostic &SM,void *Context,
328  unsigned LocCookie) {
330  ((BackendConsumer*)Context)->InlineAsmDiagHandler2(SM, Loc);
331  }
332 
333  /// Get the best possible source location to represent a diagnostic that
334  /// may have associated debug info.
335  const FullSourceLoc
336  getBestLocationFromDebugLoc(const llvm::DiagnosticInfoWithLocationBase &D,
337  bool &BadDebugInfo, StringRef &Filename,
338  unsigned &Line, unsigned &Column) const;
339 
340  void InlineAsmDiagHandler2(const llvm::SMDiagnostic &,
341  SourceLocation LocCookie);
342 
343  void DiagnosticHandlerImpl(const llvm::DiagnosticInfo &DI);
344  /// \brief Specialized handler for InlineAsm diagnostic.
345  /// \return True if the diagnostic has been successfully reported, false
346  /// otherwise.
347  bool InlineAsmDiagHandler(const llvm::DiagnosticInfoInlineAsm &D);
348  /// \brief Specialized handler for StackSize diagnostic.
349  /// \return True if the diagnostic has been successfully reported, false
350  /// otherwise.
351  bool StackSizeDiagHandler(const llvm::DiagnosticInfoStackSize &D);
352  /// \brief Specialized handler for unsupported backend feature diagnostic.
353  void UnsupportedDiagHandler(const llvm::DiagnosticInfoUnsupported &D);
354  /// \brief Specialized handlers for optimization remarks.
355  /// Note that these handlers only accept remarks and they always handle
356  /// them.
357  void EmitOptimizationMessage(const llvm::DiagnosticInfoOptimizationBase &D,
358  unsigned DiagID);
359  void
360  OptimizationRemarkHandler(const llvm::DiagnosticInfoOptimizationBase &D);
361  void OptimizationRemarkHandler(
362  const llvm::OptimizationRemarkAnalysisFPCommute &D);
363  void OptimizationRemarkHandler(
364  const llvm::OptimizationRemarkAnalysisAliasing &D);
365  void OptimizationFailureHandler(
366  const llvm::DiagnosticInfoOptimizationFailure &D);
367  };
368 
369  void BackendConsumer::anchor() {}
370 }
371 
372 bool ClangDiagnosticHandler::handleDiagnostics(const DiagnosticInfo &DI) {
373  BackendCon->DiagnosticHandlerImpl(DI);
374  return true;
375 }
376 
377 /// ConvertBackendLocation - Convert a location in a temporary llvm::SourceMgr
378 /// buffer to be a valid FullSourceLoc.
379 static FullSourceLoc ConvertBackendLocation(const llvm::SMDiagnostic &D,
380  SourceManager &CSM) {
381  // Get both the clang and llvm source managers. The location is relative to
382  // a memory buffer that the LLVM Source Manager is handling, we need to add
383  // a copy to the Clang source manager.
384  const llvm::SourceMgr &LSM = *D.getSourceMgr();
385 
386  // We need to copy the underlying LLVM memory buffer because llvm::SourceMgr
387  // already owns its one and clang::SourceManager wants to own its one.
388  const MemoryBuffer *LBuf =
389  LSM.getMemoryBuffer(LSM.FindBufferContainingLoc(D.getLoc()));
390 
391  // Create the copy and transfer ownership to clang::SourceManager.
392  // TODO: Avoid copying files into memory.
393  std::unique_ptr<llvm::MemoryBuffer> CBuf =
394  llvm::MemoryBuffer::getMemBufferCopy(LBuf->getBuffer(),
395  LBuf->getBufferIdentifier());
396  // FIXME: Keep a file ID map instead of creating new IDs for each location.
397  FileID FID = CSM.createFileID(std::move(CBuf));
398 
399  // Translate the offset into the file.
400  unsigned Offset = D.getLoc().getPointer() - LBuf->getBufferStart();
401  SourceLocation NewLoc =
402  CSM.getLocForStartOfFile(FID).getLocWithOffset(Offset);
403  return FullSourceLoc(NewLoc, CSM);
404 }
405 
406 
407 /// InlineAsmDiagHandler2 - This function is invoked when the backend hits an
408 /// error parsing inline asm. The SMDiagnostic indicates the error relative to
409 /// the temporary memory buffer that the inline asm parser has set up.
410 void BackendConsumer::InlineAsmDiagHandler2(const llvm::SMDiagnostic &D,
411  SourceLocation LocCookie) {
412  // There are a couple of different kinds of errors we could get here. First,
413  // we re-format the SMDiagnostic in terms of a clang diagnostic.
414 
415  // Strip "error: " off the start of the message string.
416  StringRef Message = D.getMessage();
417  if (Message.startswith("error: "))
418  Message = Message.substr(7);
419 
420  // If the SMDiagnostic has an inline asm source location, translate it.
421  FullSourceLoc Loc;
422  if (D.getLoc() != SMLoc())
423  Loc = ConvertBackendLocation(D, Context->getSourceManager());
424 
425  unsigned DiagID;
426  switch (D.getKind()) {
427  case llvm::SourceMgr::DK_Error:
428  DiagID = diag::err_fe_inline_asm;
429  break;
430  case llvm::SourceMgr::DK_Warning:
431  DiagID = diag::warn_fe_inline_asm;
432  break;
433  case llvm::SourceMgr::DK_Note:
434  DiagID = diag::note_fe_inline_asm;
435  break;
436  case llvm::SourceMgr::DK_Remark:
437  llvm_unreachable("remarks unexpected");
438  }
439  // If this problem has clang-level source location information, report the
440  // issue in the source with a note showing the instantiated
441  // code.
442  if (LocCookie.isValid()) {
443  Diags.Report(LocCookie, DiagID).AddString(Message);
444 
445  if (D.getLoc().isValid()) {
446  DiagnosticBuilder B = Diags.Report(Loc, diag::note_fe_inline_asm_here);
447  // Convert the SMDiagnostic ranges into SourceRange and attach them
448  // to the diagnostic.
449  for (const std::pair<unsigned, unsigned> &Range : D.getRanges()) {
450  unsigned Column = D.getColumnNo();
451  B << SourceRange(Loc.getLocWithOffset(Range.first - Column),
452  Loc.getLocWithOffset(Range.second - Column));
453  }
454  }
455  return;
456  }
457 
458  // Otherwise, report the backend issue as occurring in the generated .s file.
459  // If Loc is invalid, we still need to report the issue, it just gets no
460  // location info.
461  Diags.Report(Loc, DiagID).AddString(Message);
462 }
463 
464 #define ComputeDiagID(Severity, GroupName, DiagID) \
465  do { \
466  switch (Severity) { \
467  case llvm::DS_Error: \
468  DiagID = diag::err_fe_##GroupName; \
469  break; \
470  case llvm::DS_Warning: \
471  DiagID = diag::warn_fe_##GroupName; \
472  break; \
473  case llvm::DS_Remark: \
474  llvm_unreachable("'remark' severity not expected"); \
475  break; \
476  case llvm::DS_Note: \
477  DiagID = diag::note_fe_##GroupName; \
478  break; \
479  } \
480  } while (false)
481 
482 #define ComputeDiagRemarkID(Severity, GroupName, DiagID) \
483  do { \
484  switch (Severity) { \
485  case llvm::DS_Error: \
486  DiagID = diag::err_fe_##GroupName; \
487  break; \
488  case llvm::DS_Warning: \
489  DiagID = diag::warn_fe_##GroupName; \
490  break; \
491  case llvm::DS_Remark: \
492  DiagID = diag::remark_fe_##GroupName; \
493  break; \
494  case llvm::DS_Note: \
495  DiagID = diag::note_fe_##GroupName; \
496  break; \
497  } \
498  } while (false)
499 
500 bool
501 BackendConsumer::InlineAsmDiagHandler(const llvm::DiagnosticInfoInlineAsm &D) {
502  unsigned DiagID;
503  ComputeDiagID(D.getSeverity(), inline_asm, DiagID);
504  std::string Message = D.getMsgStr().str();
505 
506  // If this problem has clang-level source location information, report the
507  // issue as being a problem in the source with a note showing the instantiated
508  // code.
509  SourceLocation LocCookie =
510  SourceLocation::getFromRawEncoding(D.getLocCookie());
511  if (LocCookie.isValid())
512  Diags.Report(LocCookie, DiagID).AddString(Message);
513  else {
514  // Otherwise, report the backend diagnostic as occurring in the generated
515  // .s file.
516  // If Loc is invalid, we still need to report the diagnostic, it just gets
517  // no location info.
518  FullSourceLoc Loc;
519  Diags.Report(Loc, DiagID).AddString(Message);
520  }
521  // We handled all the possible severities.
522  return true;
523 }
524 
525 bool
526 BackendConsumer::StackSizeDiagHandler(const llvm::DiagnosticInfoStackSize &D) {
527  if (D.getSeverity() != llvm::DS_Warning)
528  // For now, the only support we have for StackSize diagnostic is warning.
529  // We do not know how to format other severities.
530  return false;
531 
532  if (const Decl *ND = Gen->GetDeclForMangledName(D.getFunction().getName())) {
533  // FIXME: Shouldn't need to truncate to uint32_t
534  Diags.Report(ND->getASTContext().getFullLoc(ND->getLocation()),
535  diag::warn_fe_frame_larger_than)
536  << static_cast<uint32_t>(D.getStackSize()) << Decl::castToDeclContext(ND);
537  return true;
538  }
539 
540  return false;
541 }
542 
544  const llvm::DiagnosticInfoWithLocationBase &D, bool &BadDebugInfo,
545  StringRef &Filename, unsigned &Line, unsigned &Column) const {
546  SourceManager &SourceMgr = Context->getSourceManager();
547  FileManager &FileMgr = SourceMgr.getFileManager();
548  SourceLocation DILoc;
549 
550  if (D.isLocationAvailable()) {
551  D.getLocation(&Filename, &Line, &Column);
552  const FileEntry *FE = FileMgr.getFile(Filename);
553  if (FE && Line > 0) {
554  // If -gcolumn-info was not used, Column will be 0. This upsets the
555  // source manager, so pass 1 if Column is not set.
556  DILoc = SourceMgr.translateFileLineCol(FE, Line, Column ? Column : 1);
557  }
558  BadDebugInfo = DILoc.isInvalid();
559  }
560 
561  // If a location isn't available, try to approximate it using the associated
562  // function definition. We use the definition's right brace to differentiate
563  // from diagnostics that genuinely relate to the function itself.
564  FullSourceLoc Loc(DILoc, SourceMgr);
565  if (Loc.isInvalid())
566  if (const Decl *FD = Gen->GetDeclForMangledName(D.getFunction().getName()))
567  Loc = FD->getASTContext().getFullLoc(FD->getLocation());
568 
569  if (DILoc.isInvalid() && D.isLocationAvailable())
570  // If we were not able to translate the file:line:col information
571  // back to a SourceLocation, at least emit a note stating that
572  // we could not translate this location. This can happen in the
573  // case of #line directives.
574  Diags.Report(Loc, diag::note_fe_backend_invalid_loc)
575  << Filename << Line << Column;
576 
577  return Loc;
578 }
579 
581  const llvm::DiagnosticInfoUnsupported &D) {
582  // We only support errors.
583  assert(D.getSeverity() == llvm::DS_Error);
584 
585  StringRef Filename;
586  unsigned Line, Column;
587  bool BadDebugInfo = false;
588  FullSourceLoc Loc =
589  getBestLocationFromDebugLoc(D, BadDebugInfo, Filename, Line, Column);
590 
591  Diags.Report(Loc, diag::err_fe_backend_unsupported) << D.getMessage().str();
592 
593  if (BadDebugInfo)
594  // If we were not able to translate the file:line:col information
595  // back to a SourceLocation, at least emit a note stating that
596  // we could not translate this location. This can happen in the
597  // case of #line directives.
598  Diags.Report(Loc, diag::note_fe_backend_invalid_loc)
599  << Filename << Line << Column;
600 }
601 
603  const llvm::DiagnosticInfoOptimizationBase &D, unsigned DiagID) {
604  // We only support warnings and remarks.
605  assert(D.getSeverity() == llvm::DS_Remark ||
606  D.getSeverity() == llvm::DS_Warning);
607 
608  StringRef Filename;
609  unsigned Line, Column;
610  bool BadDebugInfo = false;
611  FullSourceLoc Loc =
612  getBestLocationFromDebugLoc(D, BadDebugInfo, Filename, Line, Column);
613 
614  std::string Msg;
615  raw_string_ostream MsgStream(Msg);
616  MsgStream << D.getMsg();
617 
618  if (D.getHotness())
619  MsgStream << " (hotness: " << *D.getHotness() << ")";
620 
621  Diags.Report(Loc, DiagID)
622  << AddFlagValue(D.getPassName())
623  << MsgStream.str();
624 
625  if (BadDebugInfo)
626  // If we were not able to translate the file:line:col information
627  // back to a SourceLocation, at least emit a note stating that
628  // we could not translate this location. This can happen in the
629  // case of #line directives.
630  Diags.Report(Loc, diag::note_fe_backend_invalid_loc)
631  << Filename << Line << Column;
632 }
633 
635  const llvm::DiagnosticInfoOptimizationBase &D) {
636  // Without hotness information, don't show noisy remarks.
637  if (D.isVerbose() && !D.getHotness())
638  return;
639 
640  if (D.isPassed()) {
641  // Optimization remarks are active only if the -Rpass flag has a regular
642  // expression that matches the name of the pass name in \p D.
643  if (CodeGenOpts.OptimizationRemarkPattern &&
644  CodeGenOpts.OptimizationRemarkPattern->match(D.getPassName()))
645  EmitOptimizationMessage(D, diag::remark_fe_backend_optimization_remark);
646  } else if (D.isMissed()) {
647  // Missed optimization remarks are active only if the -Rpass-missed
648  // flag has a regular expression that matches the name of the pass
649  // name in \p D.
650  if (CodeGenOpts.OptimizationRemarkMissedPattern &&
651  CodeGenOpts.OptimizationRemarkMissedPattern->match(D.getPassName()))
652  EmitOptimizationMessage(
653  D, diag::remark_fe_backend_optimization_remark_missed);
654  } else {
655  assert(D.isAnalysis() && "Unknown remark type");
656 
657  bool ShouldAlwaysPrint = false;
658  if (auto *ORA = dyn_cast<llvm::OptimizationRemarkAnalysis>(&D))
659  ShouldAlwaysPrint = ORA->shouldAlwaysPrint();
660 
661  if (ShouldAlwaysPrint ||
662  (CodeGenOpts.OptimizationRemarkAnalysisPattern &&
663  CodeGenOpts.OptimizationRemarkAnalysisPattern->match(D.getPassName())))
664  EmitOptimizationMessage(
665  D, diag::remark_fe_backend_optimization_remark_analysis);
666  }
667 }
668 
670  const llvm::OptimizationRemarkAnalysisFPCommute &D) {
671  // Optimization analysis remarks are active if the pass name is set to
672  // llvm::DiagnosticInfo::AlwasyPrint or if the -Rpass-analysis flag has a
673  // regular expression that matches the name of the pass name in \p D.
674 
675  if (D.shouldAlwaysPrint() ||
676  (CodeGenOpts.OptimizationRemarkAnalysisPattern &&
677  CodeGenOpts.OptimizationRemarkAnalysisPattern->match(D.getPassName())))
678  EmitOptimizationMessage(
679  D, diag::remark_fe_backend_optimization_remark_analysis_fpcommute);
680 }
681 
683  const llvm::OptimizationRemarkAnalysisAliasing &D) {
684  // Optimization analysis remarks are active if the pass name is set to
685  // llvm::DiagnosticInfo::AlwasyPrint or if the -Rpass-analysis flag has a
686  // regular expression that matches the name of the pass name in \p D.
687 
688  if (D.shouldAlwaysPrint() ||
689  (CodeGenOpts.OptimizationRemarkAnalysisPattern &&
690  CodeGenOpts.OptimizationRemarkAnalysisPattern->match(D.getPassName())))
691  EmitOptimizationMessage(
692  D, diag::remark_fe_backend_optimization_remark_analysis_aliasing);
693 }
694 
696  const llvm::DiagnosticInfoOptimizationFailure &D) {
697  EmitOptimizationMessage(D, diag::warn_fe_backend_optimization_failure);
698 }
699 
700 /// \brief This function is invoked when the backend needs
701 /// to report something to the user.
702 void BackendConsumer::DiagnosticHandlerImpl(const DiagnosticInfo &DI) {
703  unsigned DiagID = diag::err_fe_inline_asm;
704  llvm::DiagnosticSeverity Severity = DI.getSeverity();
705  // Get the diagnostic ID based.
706  switch (DI.getKind()) {
707  case llvm::DK_InlineAsm:
708  if (InlineAsmDiagHandler(cast<DiagnosticInfoInlineAsm>(DI)))
709  return;
710  ComputeDiagID(Severity, inline_asm, DiagID);
711  break;
712  case llvm::DK_StackSize:
713  if (StackSizeDiagHandler(cast<DiagnosticInfoStackSize>(DI)))
714  return;
715  ComputeDiagID(Severity, backend_frame_larger_than, DiagID);
716  break;
717  case DK_Linker:
718  assert(CurLinkModule);
719  // FIXME: stop eating the warnings and notes.
720  if (Severity != DS_Error)
721  return;
722  DiagID = diag::err_fe_cannot_link_module;
723  break;
724  case llvm::DK_OptimizationRemark:
725  // Optimization remarks are always handled completely by this
726  // handler. There is no generic way of emitting them.
727  OptimizationRemarkHandler(cast<OptimizationRemark>(DI));
728  return;
729  case llvm::DK_OptimizationRemarkMissed:
730  // Optimization remarks are always handled completely by this
731  // handler. There is no generic way of emitting them.
732  OptimizationRemarkHandler(cast<OptimizationRemarkMissed>(DI));
733  return;
734  case llvm::DK_OptimizationRemarkAnalysis:
735  // Optimization remarks are always handled completely by this
736  // handler. There is no generic way of emitting them.
737  OptimizationRemarkHandler(cast<OptimizationRemarkAnalysis>(DI));
738  return;
739  case llvm::DK_OptimizationRemarkAnalysisFPCommute:
740  // Optimization remarks are always handled completely by this
741  // handler. There is no generic way of emitting them.
742  OptimizationRemarkHandler(cast<OptimizationRemarkAnalysisFPCommute>(DI));
743  return;
744  case llvm::DK_OptimizationRemarkAnalysisAliasing:
745  // Optimization remarks are always handled completely by this
746  // handler. There is no generic way of emitting them.
747  OptimizationRemarkHandler(cast<OptimizationRemarkAnalysisAliasing>(DI));
748  return;
749  case llvm::DK_MachineOptimizationRemark:
750  // Optimization remarks are always handled completely by this
751  // handler. There is no generic way of emitting them.
752  OptimizationRemarkHandler(cast<MachineOptimizationRemark>(DI));
753  return;
754  case llvm::DK_MachineOptimizationRemarkMissed:
755  // Optimization remarks are always handled completely by this
756  // handler. There is no generic way of emitting them.
757  OptimizationRemarkHandler(cast<MachineOptimizationRemarkMissed>(DI));
758  return;
759  case llvm::DK_MachineOptimizationRemarkAnalysis:
760  // Optimization remarks are always handled completely by this
761  // handler. There is no generic way of emitting them.
762  OptimizationRemarkHandler(cast<MachineOptimizationRemarkAnalysis>(DI));
763  return;
764  case llvm::DK_OptimizationFailure:
765  // Optimization failures are always handled completely by this
766  // handler.
767  OptimizationFailureHandler(cast<DiagnosticInfoOptimizationFailure>(DI));
768  return;
769  case llvm::DK_Unsupported:
770  UnsupportedDiagHandler(cast<DiagnosticInfoUnsupported>(DI));
771  return;
772  default:
773  // Plugin IDs are not bound to any value as they are set dynamically.
774  ComputeDiagRemarkID(Severity, backend_plugin, DiagID);
775  break;
776  }
777  std::string MsgStorage;
778  {
779  raw_string_ostream Stream(MsgStorage);
780  DiagnosticPrinterRawOStream DP(Stream);
781  DI.print(DP);
782  }
783 
784  if (DiagID == diag::err_fe_cannot_link_module) {
785  Diags.Report(diag::err_fe_cannot_link_module)
786  << CurLinkModule->getModuleIdentifier() << MsgStorage;
787  return;
788  }
789 
790  // Report the backend message using the usual diagnostic mechanism.
791  FullSourceLoc Loc;
792  Diags.Report(Loc, DiagID).AddString(MsgStorage);
793 }
794 #undef ComputeDiagID
795 
796 CodeGenAction::CodeGenAction(unsigned _Act, LLVMContext *_VMContext)
797  : Act(_Act), VMContext(_VMContext ? _VMContext : new LLVMContext),
798  OwnsVMContext(!_VMContext) {}
799 
801  TheModule.reset();
802  if (OwnsVMContext)
803  delete VMContext;
804 }
805 
806 bool CodeGenAction::hasIRSupport() const { return true; }
807 
809  // If the consumer creation failed, do nothing.
810  if (!getCompilerInstance().hasASTConsumer())
811  return;
812 
813  // Steal the module from the consumer.
814  TheModule = BEConsumer->takeModule();
815 }
816 
817 std::unique_ptr<llvm::Module> CodeGenAction::takeModule() {
818  return std::move(TheModule);
819 }
820 
821 llvm::LLVMContext *CodeGenAction::takeLLVMContext() {
822  OwnsVMContext = false;
823  return VMContext;
824 }
825 
826 static std::unique_ptr<raw_pwrite_stream>
827 GetOutputStream(CompilerInstance &CI, StringRef InFile, BackendAction Action) {
828  switch (Action) {
830  return CI.createDefaultOutputFile(false, InFile, "s");
831  case Backend_EmitLL:
832  return CI.createDefaultOutputFile(false, InFile, "ll");
833  case Backend_EmitBC:
834  return CI.createDefaultOutputFile(true, InFile, "bc");
835  case Backend_EmitNothing:
836  return nullptr;
837  case Backend_EmitMCNull:
838  return CI.createNullOutputFile();
839  case Backend_EmitObj:
840  return CI.createDefaultOutputFile(true, InFile, "o");
841  }
842 
843  llvm_unreachable("Invalid action!");
844 }
845 
846 std::unique_ptr<ASTConsumer>
848  BackendAction BA = static_cast<BackendAction>(Act);
849  std::unique_ptr<raw_pwrite_stream> OS = GetOutputStream(CI, InFile, BA);
850  if (BA != Backend_EmitNothing && !OS)
851  return nullptr;
852 
853  // Load bitcode modules to link with, if we need to.
854  if (LinkModules.empty())
855  for (const CodeGenOptions::BitcodeFileToLink &F :
857  auto BCBuf = CI.getFileManager().getBufferForFile(F.Filename);
858  if (!BCBuf) {
859  CI.getDiagnostics().Report(diag::err_cannot_open_file)
860  << F.Filename << BCBuf.getError().message();
861  LinkModules.clear();
862  return nullptr;
863  }
864 
866  getOwningLazyBitcodeModule(std::move(*BCBuf), *VMContext);
867  if (!ModuleOrErr) {
868  handleAllErrors(ModuleOrErr.takeError(), [&](ErrorInfoBase &EIB) {
869  CI.getDiagnostics().Report(diag::err_cannot_open_file)
870  << F.Filename << EIB.message();
871  });
872  LinkModules.clear();
873  return nullptr;
874  }
875  LinkModules.push_back({std::move(ModuleOrErr.get()), F.PropagateAttrs,
876  F.Internalize, F.LinkFlags});
877  }
878 
879  CoverageSourceInfo *CoverageInfo = nullptr;
880  // Add the preprocessor callback only when the coverage mapping is generated.
881  if (CI.getCodeGenOpts().CoverageMapping) {
882  CoverageInfo = new CoverageSourceInfo;
884  std::unique_ptr<PPCallbacks>(CoverageInfo));
885  }
886 
887  std::unique_ptr<BackendConsumer> Result(new BackendConsumer(
888  BA, CI.getDiagnostics(), CI.getHeaderSearchOpts(),
890  CI.getLangOpts(), CI.getFrontendOpts().ShowTimers, InFile,
891  std::move(LinkModules), std::move(OS), *VMContext, CoverageInfo));
892  BEConsumer = Result.get();
893 
894  // Enable generating macro debug info only when debug info is not disabled and
895  // also macro debug info is enabled.
896  if (CI.getCodeGenOpts().getDebugInfo() != codegenoptions::NoDebugInfo &&
897  CI.getCodeGenOpts().MacroDebugInfo) {
898  std::unique_ptr<PPCallbacks> Callbacks =
899  llvm::make_unique<MacroPPCallbacks>(BEConsumer->getCodeGenerator(),
900  CI.getPreprocessor());
901  CI.getPreprocessor().addPPCallbacks(std::move(Callbacks));
902  }
903 
904  return std::move(Result);
905 }
906 
907 static void BitcodeInlineAsmDiagHandler(const llvm::SMDiagnostic &SM,
908  void *Context,
909  unsigned LocCookie) {
910  SM.print(nullptr, llvm::errs());
911 
912  auto Diags = static_cast<DiagnosticsEngine *>(Context);
913  unsigned DiagID;
914  switch (SM.getKind()) {
915  case llvm::SourceMgr::DK_Error:
916  DiagID = diag::err_fe_inline_asm;
917  break;
918  case llvm::SourceMgr::DK_Warning:
919  DiagID = diag::warn_fe_inline_asm;
920  break;
921  case llvm::SourceMgr::DK_Note:
922  DiagID = diag::note_fe_inline_asm;
923  break;
924  case llvm::SourceMgr::DK_Remark:
925  llvm_unreachable("remarks unexpected");
926  }
927 
928  Diags->Report(DiagID).AddString("cannot compile inline asm");
929 }
930 
931 std::unique_ptr<llvm::Module> CodeGenAction::loadModule(MemoryBufferRef MBRef) {
934 
935  // For ThinLTO backend invocations, ensure that the context
936  // merges types based on ODR identifiers. We also need to read
937  // the correct module out of a multi-module bitcode file.
938  if (!CI.getCodeGenOpts().ThinLTOIndexFile.empty()) {
939  VMContext->enableDebugTypeODRUniquing();
940 
941  auto DiagErrors = [&](Error E) -> std::unique_ptr<llvm::Module> {
942  unsigned DiagID =
944  handleAllErrors(std::move(E), [&](ErrorInfoBase &EIB) {
945  CI.getDiagnostics().Report(DiagID) << EIB.message();
946  });
947  return {};
948  };
949 
951  if (!BMOrErr)
952  return DiagErrors(BMOrErr.takeError());
953 
955  BMOrErr->parseModule(*VMContext);
956  if (!MOrErr)
957  return DiagErrors(MOrErr.takeError());
958  return std::move(*MOrErr);
959  }
960 
961  llvm::SMDiagnostic Err;
962  if (std::unique_ptr<llvm::Module> M = parseIR(MBRef, Err, *VMContext))
963  return M;
964 
965  // Translate from the diagnostic info to the SourceManager location if
966  // available.
967  // TODO: Unify this with ConvertBackendLocation()
968  SourceLocation Loc;
969  if (Err.getLineNo() > 0) {
970  assert(Err.getColumnNo() >= 0);
972  Err.getLineNo(), Err.getColumnNo() + 1);
973  }
974 
975  // Strip off a leading diagnostic code if there is one.
976  StringRef Msg = Err.getMessage();
977  if (Msg.startswith("error: "))
978  Msg = Msg.substr(7);
979 
980  unsigned DiagID =
982 
983  CI.getDiagnostics().Report(Loc, DiagID) << Msg;
984  return {};
985 }
986 
988  // If this is an IR file, we have to treat it specially.
989  if (getCurrentFileKind().getLanguage() == InputKind::LLVM_IR) {
990  BackendAction BA = static_cast<BackendAction>(Act);
992  std::unique_ptr<raw_pwrite_stream> OS =
993  GetOutputStream(CI, getCurrentFile(), BA);
994  if (BA != Backend_EmitNothing && !OS)
995  return;
996 
997  bool Invalid;
999  FileID FID = SM.getMainFileID();
1000  llvm::MemoryBuffer *MainFile = SM.getBuffer(FID, &Invalid);
1001  if (Invalid)
1002  return;
1003 
1004  TheModule = loadModule(*MainFile);
1005  if (!TheModule)
1006  return;
1007 
1008  const TargetOptions &TargetOpts = CI.getTargetOpts();
1009  if (TheModule->getTargetTriple() != TargetOpts.Triple) {
1011  diag::warn_fe_override_module)
1012  << TargetOpts.Triple;
1013  TheModule->setTargetTriple(TargetOpts.Triple);
1014  }
1015 
1016  EmbedBitcode(TheModule.get(), CI.getCodeGenOpts(),
1017  MainFile->getMemBufferRef());
1018 
1019  LLVMContext &Ctx = TheModule->getContext();
1020  Ctx.setInlineAsmDiagnosticHandler(BitcodeInlineAsmDiagHandler,
1021  &CI.getDiagnostics());
1022 
1024  CI.getCodeGenOpts(), TargetOpts, CI.getLangOpts(),
1025  CI.getTarget().getDataLayout(), TheModule.get(), BA,
1026  std::move(OS));
1027  return;
1028  }
1029 
1030  // Otherwise follow the normal AST path.
1032 }
1033 
1034 //
1035 
1036 void EmitAssemblyAction::anchor() { }
1037 EmitAssemblyAction::EmitAssemblyAction(llvm::LLVMContext *_VMContext)
1038  : CodeGenAction(Backend_EmitAssembly, _VMContext) {}
1039 
1040 void EmitBCAction::anchor() { }
1041 EmitBCAction::EmitBCAction(llvm::LLVMContext *_VMContext)
1042  : CodeGenAction(Backend_EmitBC, _VMContext) {}
1043 
1044 void EmitLLVMAction::anchor() { }
1045 EmitLLVMAction::EmitLLVMAction(llvm::LLVMContext *_VMContext)
1046  : CodeGenAction(Backend_EmitLL, _VMContext) {}
1047 
1048 void EmitLLVMOnlyAction::anchor() { }
1049 EmitLLVMOnlyAction::EmitLLVMOnlyAction(llvm::LLVMContext *_VMContext)
1050  : CodeGenAction(Backend_EmitNothing, _VMContext) {}
1051 
1052 void EmitCodeGenOnlyAction::anchor() { }
1053 EmitCodeGenOnlyAction::EmitCodeGenOnlyAction(llvm::LLVMContext *_VMContext)
1054  : CodeGenAction(Backend_EmitMCNull, _VMContext) {}
1055 
1056 void EmitObjAction::anchor() { }
1057 EmitObjAction::EmitObjAction(llvm::LLVMContext *_VMContext)
1058  : CodeGenAction(Backend_EmitObj, _VMContext) {}
SourceLocation getLocForStartOfFile(FileID FID) const
Return the source location corresponding to the first byte of the specified file. ...
void EmitOptimizationMessage(const llvm::DiagnosticInfoOptimizationBase &D, unsigned DiagID)
Specialized handlers for optimization remarks.
Defines the clang::ASTContext interface.
LangOptions & getLangOpts()
void HandleInlineFunctionDefinition(FunctionDecl *D) override
This callback is invoked each time an inline (method or friend) function definition in a class is com...
FunctionDecl - An instance of this class is created to represent a function declaration or definition...
Definition: Decl.h:1631
PreprocessorOptions & getPreprocessorOpts()
static void InlineAsmDiagHandler(const llvm::SMDiagnostic &SM, void *Context, unsigned LocCookie)
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
static DeclContext * castToDeclContext(const Decl *)
Definition: DeclBase.cpp:831
bool isPassedOptRemarkEnabled(StringRef PassName) const override
Implements support for file system lookup, file system caching, and directory search management...
Definition: FileManager.h:116
bool hasIRSupport() const override
Does this action support use with IR files?
ASTConsumer - This is an abstract interface that should be implemented by clients that read ASTs...
Definition: ASTConsumer.h:34
Defines the clang::FileManager interface and associated types.
Emit human-readable LLVM assembly.
Definition: BackendUtil.h:34
DominatorTree GraphTraits specialization so the DominatorTree can be iterable by generic graph iterat...
Definition: Dominators.h:26
Run CodeGen, but don&#39;t emit anything.
Definition: BackendUtil.h:36
void EndSourceFileAction() override
Callback at the end of processing a single input.
void ExecuteAction() override
Implement the ExecuteAction interface by running Sema on the already-initialized AST consumer...
Defines the SourceManager interface.
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:81
bool HandleTopLevelDecl(DeclGroupRef D) override
HandleTopLevelDecl - Handle the specified top-level declaration.
friend class BackendConsumer
Definition: CodeGenAction.h:27
Stores additional source code information like skipped ranges which is required by the coverage mappi...
DiagnosticBuilder Report(SourceLocation Loc, unsigned DiagID)
Issue the message to the client.
Definition: Diagnostic.h:1205
const TargetInfo & getTargetInfo() const
Definition: ASTContext.h:645
void HandleTagDeclRequiredDefinition(const TagDecl *D) override
This callback is invoked the first time each TagDecl is required to be complete.
std::unique_ptr< llvm::Module > takeModule()
PreprocessorOptions - This class is used for passing the various options used in preprocessor initial...
Don&#39;t emit anything (benchmarking mode)
Definition: BackendUtil.h:35
VarDecl - An instance of this class is created to represent a variable declaration or definition...
Definition: Decl.h:771
Options for controlling the target.
Definition: TargetOptions.h:26
Severity
Enum values that allow the client to map NOTEs, WARNINGs, and EXTENSIONs to either Ignore (nothing)...
Definition: DiagnosticIDs.h:80
void HandleTagDeclDefinition(TagDecl *D) override
HandleTagDeclDefinition - This callback is invoked each time a TagDecl (e.g.
bool StackSizeDiagHandler(const llvm::DiagnosticInfoStackSize &D)
Specialized handler for StackSize diagnostic.
FileManager & getFileManager() const
bool isAnyRemarkEnabled() const override
#define ComputeDiagRemarkID(Severity, GroupName, DiagID)
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:128
Emit LLVM bitcode files.
Definition: BackendUtil.h:33
static SourceLocation getFromRawEncoding(unsigned Encoding)
Turn a raw encoding of a SourceLocation object into a real SourceLocation.
void OptimizationFailureHandler(const llvm::DiagnosticInfoOptimizationFailure &D)
SourceLocation translateFileLineCol(const FileEntry *SourceFile, unsigned Line, unsigned Col) const
Get the source location for the given file:line:col triplet.
Definition: Format.h:1821
void CompleteTentativeDefinition(VarDecl *D) override
CompleteTentativeDefinition - Callback invoked at the end of a translation unit to notify the consume...
CodeGenOptions & getCodeGenOpts()
void ExecuteAction() override
Callback to run the program action, using the initialized compiler instance.
Keeps track of the various options that can be enabled, which controls the dialect of C or C++ that i...
Definition: LangOptions.h:48
BackendAction
Definition: BackendUtil.h:31
CompilerInstance & getCompilerInstance() const
FrontendOptions & getFrontendOpts()
uint32_t Offset
Definition: CacheTokens.cpp:43
Concrete class used by the front-end to report problems and issues.
Definition: Diagnostic.h:147
iterator begin()
Definition: DeclGroup.h:102
void DiagnosticHandlerImpl(const llvm::DiagnosticInfo &DI)
This function is invoked when the backend needs to report something to the user.
CodeGenerator * CreateLLVMCodeGen(DiagnosticsEngine &Diags, llvm::StringRef ModuleName, const HeaderSearchOptions &HeaderSearchOpts, const PreprocessorOptions &PreprocessorOpts, const CodeGenOptions &CGO, llvm::LLVMContext &C, CoverageSourceInfo *CoverageInfo=nullptr)
CreateLLVMCodeGen - Create a CodeGenerator instance.
void HandleInterestingDecl(DeclGroupRef D) override
HandleInterestingDecl - Handle the specified interesting declaration.
bool isMissedOptRemarkEnabled(StringRef PassName) const override
static void BitcodeInlineAsmDiagHandler(const llvm::SMDiagnostic &SM, void *Context, unsigned LocCookie)
The primary public interface to the Clang code generator.
Definition: ModuleBuilder.h:44
HeaderSearchOptions & getHeaderSearchOpts()
bool handleDiagnostics(const DiagnosticInfo &DI) override
const FileEntry * getFile(StringRef Filename, bool OpenFile=false, bool CacheFailure=true)
Lookup, cache, and verify the specified file (real or virtual).
A little helper class used to produce diagnostics.
Definition: Diagnostic.h:953
BackendConsumer * BEConsumer
Definition: CodeGenAction.h:81
StringRef Filename
Definition: Format.cpp:1316
EmitLLVMAction(llvm::LLVMContext *_VMContext=nullptr)
const FileEntry * getFileEntryForID(FileID FID) const
Returns the FileEntry record for the provided FileID.
const AnnotatedLine * Line
CodeGenAction(unsigned _Act, llvm::LLVMContext *_VMContext=nullptr)
Create a new code generation action.
FileID createFileID(const FileEntry *SourceFile, SourceLocation IncludePos, SrcMgr::CharacteristicKind FileCharacter, int LoadedID=0, unsigned LoadedOffset=0)
Create a new FileID that represents the specified file being #included from the specified IncludePosi...
unsigned ShowTimers
Show timers for individual actions.
Defines the clang::Preprocessor interface.
Emit native object files.
Definition: BackendUtil.h:37
EmitObjAction(llvm::LLVMContext *_VMContext=nullptr)
void OptimizationRemarkHandler(const llvm::DiagnosticInfoOptimizationBase &D)
InputKind getCurrentFileKind() const
The result type of a method or function.
static std::unique_ptr< raw_pwrite_stream > GetOutputStream(CompilerInstance &CI, StringRef InFile, BackendAction Action)
const SourceManager & SM
Definition: Format.cpp:1308
EmitBCAction(llvm::LLVMContext *_VMContext=nullptr)
llvm::Module * getModule() const
static FullSourceLoc ConvertBackendLocation(const llvm::SMDiagnostic &D, SourceManager &CSM)
ConvertBackendLocation - Convert a location in a temporary llvm::SourceMgr buffer to be a valid FullS...
Emit native assembly files.
Definition: BackendUtil.h:32
void UnsupportedDiagHandler(const llvm::DiagnosticInfoUnsupported &D)
Specialized handler for unsupported backend feature diagnostic.
llvm::MemoryBuffer * getBuffer(FileID FID, SourceLocation Loc, bool *Invalid=nullptr) const
Return the buffer for the specified FileID.
EmitCodeGenOnlyAction(llvm::LLVMContext *_VMContext=nullptr)
void AssignInheritanceModel(CXXRecordDecl *RD) override
Callback invoked when an MSInheritanceAttr has been attached to a CXXRecordDecl.
CompilerInstance - Helper class for managing a single instance of the Clang compiler.
Encodes a location in the source.
LLVM IR: we accept this so that we can run the optimizer on it, and compile it to assembly or object ...
TagDecl - Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:2846
ASTContext & getASTContext() const LLVM_READONLY
Definition: DeclBase.cpp:346
Cached information about one file (either on disk or in the virtual file system). ...
Definition: FileManager.h:59
std::unique_ptr< raw_pwrite_stream > createNullOutputFile()
const llvm::DataLayout & getDataLayout() const
Definition: TargetInfo.h:786
#define ComputeDiagID(Severity, GroupName, DiagID)
unsigned getCustomDiagID(Level L, const char(&FormatString)[N])
Return an ID for a diagnostic with the specified format string and level.
Definition: Diagnostic.h:689
std::vector< BitcodeFileToLink > LinkBitcodeFiles
The files specified here are linked in to the module before optimizations.
EmitLLVMOnlyAction(llvm::LLVMContext *_VMContext=nullptr)
std::string ThinLTOIndexFile
Name of the function summary index file to use for ThinLTO function importing.
std::unique_ptr< llvm::Module > takeModule()
Take the generated LLVM module, for use after the action has been run.
An opaque identifier used by SourceManager which refers to a source file (MemoryBuffer) along with it...
void EmbedBitcode(llvm::Module *M, const CodeGenOptions &CGOpts, llvm::MemoryBufferRef Buf)
Dataflow Directional Tag Classes.
bool isValid() const
Return true if this is a valid SourceLocation object.
FileManager & getFileManager() const
Return the current file manager to the caller.
FileID getMainFileID() const
Returns the FileID of the main source file.
llvm::ErrorOr< std::unique_ptr< llvm::MemoryBuffer > > getBufferForFile(const FileEntry *Entry, bool isVolatile=false, bool ShouldCloseOpenFile=true)
Open the specified file as a MemoryBuffer, returning a new MemoryBuffer if successful, otherwise returning null.
void EmitBackendOutput(DiagnosticsEngine &Diags, const HeaderSearchOptions &, const CodeGenOptions &CGOpts, const TargetOptions &TOpts, const LangOptions &LOpts, const llvm::DataLayout &TDesc, llvm::Module *M, BackendAction Action, std::unique_ptr< raw_pwrite_stream > OS)
SourceManager & getSourceManager() const
Return the current source manager.
void InlineAsmDiagHandler2(const llvm::SMDiagnostic &, SourceLocation LocCookie)
InlineAsmDiagHandler2 - This function is invoked when the backend hits an error parsing inline asm...
const FullSourceLoc getBestLocationFromDebugLoc(const llvm::DiagnosticInfoWithLocationBase &D, bool &BadDebugInfo, StringRef &Filename, unsigned &Line, unsigned &Column) const
Get the best possible source location to represent a diagnostic that may have associated debug info...
llvm::Expected< llvm::BitcodeModule > FindThinLTOModule(llvm::MemoryBufferRef MBRef)
void HandleVTable(CXXRecordDecl *RD) override
Callback involved at the end of a translation unit to notify the consumer that a vtable for the given...
void Initialize(ASTContext &Ctx) override
Initialize - This is called to initialize the consumer, providing the ASTContext. ...
TargetInfo & getTarget() const
CodeGenOptions - Track various options which control how the code is optimized and passed to the back...
std::unique_ptr< ASTConsumer > CreateASTConsumer(CompilerInstance &CI, StringRef InFile) override
Create the AST consumer object for this action, if supported.
std::unique_ptr< raw_pwrite_stream > createDefaultOutputFile(bool Binary=true, StringRef BaseInput="", StringRef Extension="")
Create the default output file (from the invocation&#39;s options) and add it to the list of tracked outp...
SourceManager & getSourceManager()
Definition: ASTContext.h:618
Preprocessor & getPreprocessor() const
Return the current preprocessor.
Defines the C++ Decl subclasses, other than those for templates (found in DeclTemplate.h) and friends (in DeclFriend.h).
EmitAssemblyAction(llvm::LLVMContext *_VMContext=nullptr)
Represents a C++ struct/union/class.
Definition: DeclCXX.h:266
llvm::LLVMContext * takeLLVMContext()
Take the LLVM context used by this action.
CodeGenerator * getCodeGenerator()
void HandleCXXStaticMemberVarInstantiation(VarDecl *VD) override
HandleCXXStaticMemberVarInstantiation - Tell the consumer that this.
ClangDiagnosticHandler(const CodeGenOptions &CGOpts, BackendConsumer *BCon)
Defines the clang::TargetInfo interface.
A SourceLocation and its associated SourceManager.
DiagnosticsEngine & getDiagnostics() const
Get the current diagnostics engine.
const StringRef getCurrentFile() const
HeaderSearchOptions - Helper class for storing options related to the initialization of the HeaderSea...
void HandleTranslationUnit(ASTContext &C) override
HandleTranslationUnit - This method is called when the ASTs for entire translation unit have been par...
BackendConsumer(BackendAction Action, DiagnosticsEngine &Diags, const HeaderSearchOptions &HeaderSearchOpts, const PreprocessorOptions &PPOpts, const CodeGenOptions &CodeGenOpts, const TargetOptions &TargetOpts, const LangOptions &LangOpts, bool TimePasses, const std::string &InFile, SmallVector< LinkModule, 4 > LinkModules, std::unique_ptr< raw_pwrite_stream > OS, LLVMContext &C, CoverageSourceInfo *CoverageInfo=nullptr)
A trivial tuple used to represent a source range.
bool isAnalysisRemarkEnabled(StringRef PassName) const override
std::string Triple
The name of the target triple to compile for.
Definition: TargetOptions.h:29
TargetOptions & getTargetOpts()
FullSourceLoc getFullLoc(SourceLocation Loc) const
Definition: ASTContext.h:673
void addPPCallbacks(std::unique_ptr< PPCallbacks > C)
Definition: Preprocessor.h:825
This class handles loading and caching of source files into memory.
SourceLocation getLocation() const
Definition: DeclBase.h:407
PrettyStackTraceDecl - If a crash occurs, indicate that it happened when doing something to a specifi...
Definition: DeclBase.h:1139