clang  9.0.0svn
CodeGenAction.cpp
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1 //===--- CodeGenAction.cpp - LLVM Code Generation Frontend Action ---------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
10 #include "CodeGenModule.h"
11 #include "CoverageMappingGen.h"
12 #include "MacroPPCallbacks.h"
13 #include "clang/AST/ASTConsumer.h"
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/DeclCXX.h"
16 #include "clang/AST/DeclGroup.h"
19 #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/IR/RemarkStreamer.h"
35 #include "llvm/IRReader/IRReader.h"
36 #include "llvm/Linker/Linker.h"
37 #include "llvm/Pass.h"
38 #include "llvm/Support/MemoryBuffer.h"
39 #include "llvm/Support/SourceMgr.h"
40 #include "llvm/Support/Timer.h"
41 #include "llvm/Support/ToolOutputFile.h"
42 #include "llvm/Support/YAMLTraits.h"
43 #include "llvm/Transforms/IPO/Internalize.h"
44 
45 #include <memory>
46 using namespace clang;
47 using namespace llvm;
48 
49 namespace clang {
50  class BackendConsumer;
52  public:
54  : CodeGenOpts(CGOpts), BackendCon(BCon) {}
55 
56  bool handleDiagnostics(const DiagnosticInfo &DI) override;
57 
58  bool isAnalysisRemarkEnabled(StringRef PassName) const override {
59  return (CodeGenOpts.OptimizationRemarkAnalysisPattern &&
60  CodeGenOpts.OptimizationRemarkAnalysisPattern->match(PassName));
61  }
62  bool isMissedOptRemarkEnabled(StringRef PassName) const override {
63  return (CodeGenOpts.OptimizationRemarkMissedPattern &&
64  CodeGenOpts.OptimizationRemarkMissedPattern->match(PassName));
65  }
66  bool isPassedOptRemarkEnabled(StringRef PassName) const override {
67  return (CodeGenOpts.OptimizationRemarkPattern &&
68  CodeGenOpts.OptimizationRemarkPattern->match(PassName));
69  }
70 
71  bool isAnyRemarkEnabled() const override {
72  return (CodeGenOpts.OptimizationRemarkAnalysisPattern ||
73  CodeGenOpts.OptimizationRemarkMissedPattern ||
74  CodeGenOpts.OptimizationRemarkPattern);
75  }
76 
77  private:
78  const CodeGenOptions &CodeGenOpts;
79  BackendConsumer *BackendCon;
80  };
81 
82  class BackendConsumer : public ASTConsumer {
83  using LinkModule = CodeGenAction::LinkModule;
84 
85  virtual void anchor();
86  DiagnosticsEngine &Diags;
87  BackendAction Action;
88  const HeaderSearchOptions &HeaderSearchOpts;
89  const CodeGenOptions &CodeGenOpts;
90  const TargetOptions &TargetOpts;
91  const LangOptions &LangOpts;
92  std::unique_ptr<raw_pwrite_stream> AsmOutStream;
93  ASTContext *Context;
94 
95  Timer LLVMIRGeneration;
96  unsigned LLVMIRGenerationRefCount;
97 
98  /// True if we've finished generating IR. This prevents us from generating
99  /// additional LLVM IR after emitting output in HandleTranslationUnit. This
100  /// can happen when Clang plugins trigger additional AST deserialization.
101  bool IRGenFinished = false;
102 
103  std::unique_ptr<CodeGenerator> Gen;
104 
105  SmallVector<LinkModule, 4> LinkModules;
106 
107  // This is here so that the diagnostic printer knows the module a diagnostic
108  // refers to.
109  llvm::Module *CurLinkModule = nullptr;
110 
111  public:
113  const HeaderSearchOptions &HeaderSearchOpts,
114  const PreprocessorOptions &PPOpts,
115  const CodeGenOptions &CodeGenOpts,
116  const TargetOptions &TargetOpts,
117  const LangOptions &LangOpts, bool TimePasses,
118  const std::string &InFile,
119  SmallVector<LinkModule, 4> LinkModules,
120  std::unique_ptr<raw_pwrite_stream> OS, LLVMContext &C,
121  CoverageSourceInfo *CoverageInfo = nullptr)
122  : Diags(Diags), Action(Action), HeaderSearchOpts(HeaderSearchOpts),
123  CodeGenOpts(CodeGenOpts), TargetOpts(TargetOpts), LangOpts(LangOpts),
124  AsmOutStream(std::move(OS)), Context(nullptr),
125  LLVMIRGeneration("irgen", "LLVM IR Generation Time"),
126  LLVMIRGenerationRefCount(0),
127  Gen(CreateLLVMCodeGen(Diags, InFile, HeaderSearchOpts, PPOpts,
128  CodeGenOpts, C, CoverageInfo)),
129  LinkModules(std::move(LinkModules)) {
130  FrontendTimesIsEnabled = TimePasses;
131  llvm::TimePassesIsEnabled = TimePasses;
132  }
133  llvm::Module *getModule() const { return Gen->GetModule(); }
134  std::unique_ptr<llvm::Module> takeModule() {
135  return std::unique_ptr<llvm::Module>(Gen->ReleaseModule());
136  }
137 
138  CodeGenerator *getCodeGenerator() { return Gen.get(); }
139 
141  Gen->HandleCXXStaticMemberVarInstantiation(VD);
142  }
143 
144  void Initialize(ASTContext &Ctx) override {
145  assert(!Context && "initialized multiple times");
146 
147  Context = &Ctx;
148 
150  LLVMIRGeneration.startTimer();
151 
152  Gen->Initialize(Ctx);
153 
155  LLVMIRGeneration.stopTimer();
156  }
157 
158  bool HandleTopLevelDecl(DeclGroupRef D) override {
159  PrettyStackTraceDecl CrashInfo(*D.begin(), SourceLocation(),
160  Context->getSourceManager(),
161  "LLVM IR generation of declaration");
162 
163  // Recurse.
165  LLVMIRGenerationRefCount += 1;
166  if (LLVMIRGenerationRefCount == 1)
167  LLVMIRGeneration.startTimer();
168  }
169 
170  Gen->HandleTopLevelDecl(D);
171 
173  LLVMIRGenerationRefCount -= 1;
174  if (LLVMIRGenerationRefCount == 0)
175  LLVMIRGeneration.stopTimer();
176  }
177 
178  return true;
179  }
180 
182  PrettyStackTraceDecl CrashInfo(D, SourceLocation(),
183  Context->getSourceManager(),
184  "LLVM IR generation of inline function");
186  LLVMIRGeneration.startTimer();
187 
188  Gen->HandleInlineFunctionDefinition(D);
189 
191  LLVMIRGeneration.stopTimer();
192  }
193 
195  // Ignore interesting decls from the AST reader after IRGen is finished.
196  if (!IRGenFinished)
197  HandleTopLevelDecl(D);
198  }
199 
200  // Links each entry in LinkModules into our module. Returns true on error.
201  bool LinkInModules() {
202  for (auto &LM : LinkModules) {
203  if (LM.PropagateAttrs)
204  for (Function &F : *LM.Module)
205  Gen->CGM().AddDefaultFnAttrs(F);
206 
207  CurLinkModule = LM.Module.get();
208 
209  bool Err;
210  if (LM.Internalize) {
211  Err = Linker::linkModules(
212  *getModule(), std::move(LM.Module), LM.LinkFlags,
213  [](llvm::Module &M, const llvm::StringSet<> &GVS) {
214  internalizeModule(M, [&GVS](const llvm::GlobalValue &GV) {
215  return !GV.hasName() || (GVS.count(GV.getName()) == 0);
216  });
217  });
218  } else {
219  Err = Linker::linkModules(*getModule(), std::move(LM.Module),
220  LM.LinkFlags);
221  }
222 
223  if (Err)
224  return true;
225  }
226  return false; // success
227  }
228 
230  {
231  PrettyStackTraceString CrashInfo("Per-file LLVM IR generation");
233  LLVMIRGenerationRefCount += 1;
234  if (LLVMIRGenerationRefCount == 1)
235  LLVMIRGeneration.startTimer();
236  }
237 
238  Gen->HandleTranslationUnit(C);
239 
241  LLVMIRGenerationRefCount -= 1;
242  if (LLVMIRGenerationRefCount == 0)
243  LLVMIRGeneration.stopTimer();
244  }
245 
246  IRGenFinished = true;
247  }
248 
249  // Silently ignore if we weren't initialized for some reason.
250  if (!getModule())
251  return;
252 
253  // Install an inline asm handler so that diagnostics get printed through
254  // our diagnostics hooks.
255  LLVMContext &Ctx = getModule()->getContext();
256  LLVMContext::InlineAsmDiagHandlerTy OldHandler =
257  Ctx.getInlineAsmDiagnosticHandler();
258  void *OldContext = Ctx.getInlineAsmDiagnosticContext();
259  Ctx.setInlineAsmDiagnosticHandler(InlineAsmDiagHandler, this);
260 
261  std::unique_ptr<DiagnosticHandler> OldDiagnosticHandler =
262  Ctx.getDiagnosticHandler();
263  Ctx.setDiagnosticHandler(llvm::make_unique<ClangDiagnosticHandler>(
264  CodeGenOpts, this));
265 
267  setupOptimizationRemarks(Ctx, CodeGenOpts.OptRecordFile,
268  CodeGenOpts.OptRecordPasses,
269  CodeGenOpts.DiagnosticsWithHotness,
270  CodeGenOpts.DiagnosticsHotnessThreshold);
271 
272  if (Error E = OptRecordFileOrErr.takeError()) {
273  handleAllErrors(
274  std::move(E),
275  [&](const RemarkSetupFileError &E) {
276  Diags.Report(diag::err_cannot_open_file)
277  << CodeGenOpts.OptRecordFile << E.message();
278  },
279  [&](const RemarkSetupPatternError &E) {
280  Diags.Report(diag::err_drv_optimization_remark_pattern)
281  << E.message() << CodeGenOpts.OptRecordPasses;
282  });
283  return;
284  }
285  std::unique_ptr<llvm::ToolOutputFile> OptRecordFile =
286  std::move(*OptRecordFileOrErr);
287 
288  if (OptRecordFile &&
289  CodeGenOpts.getProfileUse() != CodeGenOptions::ProfileNone)
290  Ctx.setDiagnosticsHotnessRequested(true);
291 
292  // Link each LinkModule into our module.
293  if (LinkInModules())
294  return;
295 
296  EmbedBitcode(getModule(), CodeGenOpts, llvm::MemoryBufferRef());
297 
298  EmitBackendOutput(Diags, HeaderSearchOpts, CodeGenOpts, TargetOpts,
299  LangOpts, C.getTargetInfo().getDataLayout(),
300  getModule(), Action, std::move(AsmOutStream));
301 
302  Ctx.setInlineAsmDiagnosticHandler(OldHandler, OldContext);
303 
304  Ctx.setDiagnosticHandler(std::move(OldDiagnosticHandler));
305 
306  if (OptRecordFile)
307  OptRecordFile->keep();
308  }
309 
310  void HandleTagDeclDefinition(TagDecl *D) override {
311  PrettyStackTraceDecl CrashInfo(D, SourceLocation(),
312  Context->getSourceManager(),
313  "LLVM IR generation of declaration");
314  Gen->HandleTagDeclDefinition(D);
315  }
316 
317  void HandleTagDeclRequiredDefinition(const TagDecl *D) override {
318  Gen->HandleTagDeclRequiredDefinition(D);
319  }
320 
322  Gen->CompleteTentativeDefinition(D);
323  }
324 
326  Gen->AssignInheritanceModel(RD);
327  }
328 
329  void HandleVTable(CXXRecordDecl *RD) override {
330  Gen->HandleVTable(RD);
331  }
332 
333  static void InlineAsmDiagHandler(const llvm::SMDiagnostic &SM,void *Context,
334  unsigned LocCookie) {
336  ((BackendConsumer*)Context)->InlineAsmDiagHandler2(SM, Loc);
337  }
338 
339  /// Get the best possible source location to represent a diagnostic that
340  /// may have associated debug info.
341  const FullSourceLoc
342  getBestLocationFromDebugLoc(const llvm::DiagnosticInfoWithLocationBase &D,
343  bool &BadDebugInfo, StringRef &Filename,
344  unsigned &Line, unsigned &Column) const;
345 
346  void InlineAsmDiagHandler2(const llvm::SMDiagnostic &,
347  SourceLocation LocCookie);
348 
349  void DiagnosticHandlerImpl(const llvm::DiagnosticInfo &DI);
350  /// Specialized handler for InlineAsm diagnostic.
351  /// \return True if the diagnostic has been successfully reported, false
352  /// otherwise.
353  bool InlineAsmDiagHandler(const llvm::DiagnosticInfoInlineAsm &D);
354  /// Specialized handler for StackSize diagnostic.
355  /// \return True if the diagnostic has been successfully reported, false
356  /// otherwise.
357  bool StackSizeDiagHandler(const llvm::DiagnosticInfoStackSize &D);
358  /// Specialized handler for unsupported backend feature diagnostic.
359  void UnsupportedDiagHandler(const llvm::DiagnosticInfoUnsupported &D);
360  /// Specialized handlers for optimization remarks.
361  /// Note that these handlers only accept remarks and they always handle
362  /// them.
363  void EmitOptimizationMessage(const llvm::DiagnosticInfoOptimizationBase &D,
364  unsigned DiagID);
365  void
366  OptimizationRemarkHandler(const llvm::DiagnosticInfoOptimizationBase &D);
367  void OptimizationRemarkHandler(
368  const llvm::OptimizationRemarkAnalysisFPCommute &D);
369  void OptimizationRemarkHandler(
370  const llvm::OptimizationRemarkAnalysisAliasing &D);
371  void OptimizationFailureHandler(
372  const llvm::DiagnosticInfoOptimizationFailure &D);
373  };
374 
375  void BackendConsumer::anchor() {}
376 }
377 
378 bool ClangDiagnosticHandler::handleDiagnostics(const DiagnosticInfo &DI) {
379  BackendCon->DiagnosticHandlerImpl(DI);
380  return true;
381 }
382 
383 /// ConvertBackendLocation - Convert a location in a temporary llvm::SourceMgr
384 /// buffer to be a valid FullSourceLoc.
385 static FullSourceLoc ConvertBackendLocation(const llvm::SMDiagnostic &D,
386  SourceManager &CSM) {
387  // Get both the clang and llvm source managers. The location is relative to
388  // a memory buffer that the LLVM Source Manager is handling, we need to add
389  // a copy to the Clang source manager.
390  const llvm::SourceMgr &LSM = *D.getSourceMgr();
391 
392  // We need to copy the underlying LLVM memory buffer because llvm::SourceMgr
393  // already owns its one and clang::SourceManager wants to own its one.
394  const MemoryBuffer *LBuf =
395  LSM.getMemoryBuffer(LSM.FindBufferContainingLoc(D.getLoc()));
396 
397  // Create the copy and transfer ownership to clang::SourceManager.
398  // TODO: Avoid copying files into memory.
399  std::unique_ptr<llvm::MemoryBuffer> CBuf =
400  llvm::MemoryBuffer::getMemBufferCopy(LBuf->getBuffer(),
401  LBuf->getBufferIdentifier());
402  // FIXME: Keep a file ID map instead of creating new IDs for each location.
403  FileID FID = CSM.createFileID(std::move(CBuf));
404 
405  // Translate the offset into the file.
406  unsigned Offset = D.getLoc().getPointer() - LBuf->getBufferStart();
407  SourceLocation NewLoc =
408  CSM.getLocForStartOfFile(FID).getLocWithOffset(Offset);
409  return FullSourceLoc(NewLoc, CSM);
410 }
411 
412 
413 /// InlineAsmDiagHandler2 - This function is invoked when the backend hits an
414 /// error parsing inline asm. The SMDiagnostic indicates the error relative to
415 /// the temporary memory buffer that the inline asm parser has set up.
416 void BackendConsumer::InlineAsmDiagHandler2(const llvm::SMDiagnostic &D,
417  SourceLocation LocCookie) {
418  // There are a couple of different kinds of errors we could get here. First,
419  // we re-format the SMDiagnostic in terms of a clang diagnostic.
420 
421  // Strip "error: " off the start of the message string.
422  StringRef Message = D.getMessage();
423  if (Message.startswith("error: "))
424  Message = Message.substr(7);
425 
426  // If the SMDiagnostic has an inline asm source location, translate it.
427  FullSourceLoc Loc;
428  if (D.getLoc() != SMLoc())
429  Loc = ConvertBackendLocation(D, Context->getSourceManager());
430 
431  unsigned DiagID;
432  switch (D.getKind()) {
433  case llvm::SourceMgr::DK_Error:
434  DiagID = diag::err_fe_inline_asm;
435  break;
436  case llvm::SourceMgr::DK_Warning:
437  DiagID = diag::warn_fe_inline_asm;
438  break;
439  case llvm::SourceMgr::DK_Note:
440  DiagID = diag::note_fe_inline_asm;
441  break;
442  case llvm::SourceMgr::DK_Remark:
443  llvm_unreachable("remarks unexpected");
444  }
445  // If this problem has clang-level source location information, report the
446  // issue in the source with a note showing the instantiated
447  // code.
448  if (LocCookie.isValid()) {
449  Diags.Report(LocCookie, DiagID).AddString(Message);
450 
451  if (D.getLoc().isValid()) {
452  DiagnosticBuilder B = Diags.Report(Loc, diag::note_fe_inline_asm_here);
453  // Convert the SMDiagnostic ranges into SourceRange and attach them
454  // to the diagnostic.
455  for (const std::pair<unsigned, unsigned> &Range : D.getRanges()) {
456  unsigned Column = D.getColumnNo();
457  B << SourceRange(Loc.getLocWithOffset(Range.first - Column),
458  Loc.getLocWithOffset(Range.second - Column));
459  }
460  }
461  return;
462  }
463 
464  // Otherwise, report the backend issue as occurring in the generated .s file.
465  // If Loc is invalid, we still need to report the issue, it just gets no
466  // location info.
467  Diags.Report(Loc, DiagID).AddString(Message);
468 }
469 
470 #define ComputeDiagID(Severity, GroupName, DiagID) \
471  do { \
472  switch (Severity) { \
473  case llvm::DS_Error: \
474  DiagID = diag::err_fe_##GroupName; \
475  break; \
476  case llvm::DS_Warning: \
477  DiagID = diag::warn_fe_##GroupName; \
478  break; \
479  case llvm::DS_Remark: \
480  llvm_unreachable("'remark' severity not expected"); \
481  break; \
482  case llvm::DS_Note: \
483  DiagID = diag::note_fe_##GroupName; \
484  break; \
485  } \
486  } while (false)
487 
488 #define ComputeDiagRemarkID(Severity, GroupName, DiagID) \
489  do { \
490  switch (Severity) { \
491  case llvm::DS_Error: \
492  DiagID = diag::err_fe_##GroupName; \
493  break; \
494  case llvm::DS_Warning: \
495  DiagID = diag::warn_fe_##GroupName; \
496  break; \
497  case llvm::DS_Remark: \
498  DiagID = diag::remark_fe_##GroupName; \
499  break; \
500  case llvm::DS_Note: \
501  DiagID = diag::note_fe_##GroupName; \
502  break; \
503  } \
504  } while (false)
505 
506 bool
507 BackendConsumer::InlineAsmDiagHandler(const llvm::DiagnosticInfoInlineAsm &D) {
508  unsigned DiagID;
509  ComputeDiagID(D.getSeverity(), inline_asm, DiagID);
510  std::string Message = D.getMsgStr().str();
511 
512  // If this problem has clang-level source location information, report the
513  // issue as being a problem in the source with a note showing the instantiated
514  // code.
515  SourceLocation LocCookie =
516  SourceLocation::getFromRawEncoding(D.getLocCookie());
517  if (LocCookie.isValid())
518  Diags.Report(LocCookie, DiagID).AddString(Message);
519  else {
520  // Otherwise, report the backend diagnostic as occurring in the generated
521  // .s file.
522  // If Loc is invalid, we still need to report the diagnostic, it just gets
523  // no location info.
524  FullSourceLoc Loc;
525  Diags.Report(Loc, DiagID).AddString(Message);
526  }
527  // We handled all the possible severities.
528  return true;
529 }
530 
531 bool
532 BackendConsumer::StackSizeDiagHandler(const llvm::DiagnosticInfoStackSize &D) {
533  if (D.getSeverity() != llvm::DS_Warning)
534  // For now, the only support we have for StackSize diagnostic is warning.
535  // We do not know how to format other severities.
536  return false;
537 
538  if (const Decl *ND = Gen->GetDeclForMangledName(D.getFunction().getName())) {
539  // FIXME: Shouldn't need to truncate to uint32_t
540  Diags.Report(ND->getASTContext().getFullLoc(ND->getLocation()),
541  diag::warn_fe_frame_larger_than)
542  << static_cast<uint32_t>(D.getStackSize()) << Decl::castToDeclContext(ND);
543  return true;
544  }
545 
546  return false;
547 }
548 
550  const llvm::DiagnosticInfoWithLocationBase &D, bool &BadDebugInfo,
551  StringRef &Filename, unsigned &Line, unsigned &Column) const {
552  SourceManager &SourceMgr = Context->getSourceManager();
553  FileManager &FileMgr = SourceMgr.getFileManager();
554  SourceLocation DILoc;
555 
556  if (D.isLocationAvailable()) {
557  D.getLocation(Filename, Line, Column);
558  if (Line > 0) {
559  const FileEntry *FE = FileMgr.getFile(Filename);
560  if (!FE)
561  FE = FileMgr.getFile(D.getAbsolutePath());
562  if (FE) {
563  // If -gcolumn-info was not used, Column will be 0. This upsets the
564  // source manager, so pass 1 if Column is not set.
565  DILoc = SourceMgr.translateFileLineCol(FE, Line, Column ? Column : 1);
566  }
567  }
568  BadDebugInfo = DILoc.isInvalid();
569  }
570 
571  // If a location isn't available, try to approximate it using the associated
572  // function definition. We use the definition's right brace to differentiate
573  // from diagnostics that genuinely relate to the function itself.
574  FullSourceLoc Loc(DILoc, SourceMgr);
575  if (Loc.isInvalid())
576  if (const Decl *FD = Gen->GetDeclForMangledName(D.getFunction().getName()))
577  Loc = FD->getASTContext().getFullLoc(FD->getLocation());
578 
579  if (DILoc.isInvalid() && D.isLocationAvailable())
580  // If we were not able to translate the file:line:col information
581  // back to a SourceLocation, at least emit a note stating that
582  // we could not translate this location. This can happen in the
583  // case of #line directives.
584  Diags.Report(Loc, diag::note_fe_backend_invalid_loc)
585  << Filename << Line << Column;
586 
587  return Loc;
588 }
589 
591  const llvm::DiagnosticInfoUnsupported &D) {
592  // We only support errors.
593  assert(D.getSeverity() == llvm::DS_Error);
594 
595  StringRef Filename;
596  unsigned Line, Column;
597  bool BadDebugInfo = false;
598  FullSourceLoc Loc =
599  getBestLocationFromDebugLoc(D, BadDebugInfo, Filename, Line, Column);
600 
601  Diags.Report(Loc, diag::err_fe_backend_unsupported) << D.getMessage().str();
602 
603  if (BadDebugInfo)
604  // If we were not able to translate the file:line:col information
605  // back to a SourceLocation, at least emit a note stating that
606  // we could not translate this location. This can happen in the
607  // case of #line directives.
608  Diags.Report(Loc, diag::note_fe_backend_invalid_loc)
609  << Filename << Line << Column;
610 }
611 
613  const llvm::DiagnosticInfoOptimizationBase &D, unsigned DiagID) {
614  // We only support warnings and remarks.
615  assert(D.getSeverity() == llvm::DS_Remark ||
616  D.getSeverity() == llvm::DS_Warning);
617 
618  StringRef Filename;
619  unsigned Line, Column;
620  bool BadDebugInfo = false;
621  FullSourceLoc Loc =
622  getBestLocationFromDebugLoc(D, BadDebugInfo, Filename, Line, Column);
623 
624  std::string Msg;
625  raw_string_ostream MsgStream(Msg);
626  MsgStream << D.getMsg();
627 
628  if (D.getHotness())
629  MsgStream << " (hotness: " << *D.getHotness() << ")";
630 
631  Diags.Report(Loc, DiagID)
632  << AddFlagValue(D.getPassName())
633  << MsgStream.str();
634 
635  if (BadDebugInfo)
636  // If we were not able to translate the file:line:col information
637  // back to a SourceLocation, at least emit a note stating that
638  // we could not translate this location. This can happen in the
639  // case of #line directives.
640  Diags.Report(Loc, diag::note_fe_backend_invalid_loc)
641  << Filename << Line << Column;
642 }
643 
645  const llvm::DiagnosticInfoOptimizationBase &D) {
646  // Without hotness information, don't show noisy remarks.
647  if (D.isVerbose() && !D.getHotness())
648  return;
649 
650  if (D.isPassed()) {
651  // Optimization remarks are active only if the -Rpass flag has a regular
652  // expression that matches the name of the pass name in \p D.
653  if (CodeGenOpts.OptimizationRemarkPattern &&
654  CodeGenOpts.OptimizationRemarkPattern->match(D.getPassName()))
655  EmitOptimizationMessage(D, diag::remark_fe_backend_optimization_remark);
656  } else if (D.isMissed()) {
657  // Missed optimization remarks are active only if the -Rpass-missed
658  // flag has a regular expression that matches the name of the pass
659  // name in \p D.
660  if (CodeGenOpts.OptimizationRemarkMissedPattern &&
661  CodeGenOpts.OptimizationRemarkMissedPattern->match(D.getPassName()))
662  EmitOptimizationMessage(
663  D, diag::remark_fe_backend_optimization_remark_missed);
664  } else {
665  assert(D.isAnalysis() && "Unknown remark type");
666 
667  bool ShouldAlwaysPrint = false;
668  if (auto *ORA = dyn_cast<llvm::OptimizationRemarkAnalysis>(&D))
669  ShouldAlwaysPrint = ORA->shouldAlwaysPrint();
670 
671  if (ShouldAlwaysPrint ||
672  (CodeGenOpts.OptimizationRemarkAnalysisPattern &&
673  CodeGenOpts.OptimizationRemarkAnalysisPattern->match(D.getPassName())))
674  EmitOptimizationMessage(
675  D, diag::remark_fe_backend_optimization_remark_analysis);
676  }
677 }
678 
680  const llvm::OptimizationRemarkAnalysisFPCommute &D) {
681  // Optimization analysis remarks are active if the pass name is set to
682  // llvm::DiagnosticInfo::AlwasyPrint or if the -Rpass-analysis flag has a
683  // regular expression that matches the name of the pass name in \p D.
684 
685  if (D.shouldAlwaysPrint() ||
686  (CodeGenOpts.OptimizationRemarkAnalysisPattern &&
687  CodeGenOpts.OptimizationRemarkAnalysisPattern->match(D.getPassName())))
688  EmitOptimizationMessage(
689  D, diag::remark_fe_backend_optimization_remark_analysis_fpcommute);
690 }
691 
693  const llvm::OptimizationRemarkAnalysisAliasing &D) {
694  // Optimization analysis remarks are active if the pass name is set to
695  // llvm::DiagnosticInfo::AlwasyPrint or if the -Rpass-analysis flag has a
696  // regular expression that matches the name of the pass name in \p D.
697 
698  if (D.shouldAlwaysPrint() ||
699  (CodeGenOpts.OptimizationRemarkAnalysisPattern &&
700  CodeGenOpts.OptimizationRemarkAnalysisPattern->match(D.getPassName())))
701  EmitOptimizationMessage(
702  D, diag::remark_fe_backend_optimization_remark_analysis_aliasing);
703 }
704 
706  const llvm::DiagnosticInfoOptimizationFailure &D) {
707  EmitOptimizationMessage(D, diag::warn_fe_backend_optimization_failure);
708 }
709 
710 /// This function is invoked when the backend needs
711 /// to report something to the user.
712 void BackendConsumer::DiagnosticHandlerImpl(const DiagnosticInfo &DI) {
713  unsigned DiagID = diag::err_fe_inline_asm;
714  llvm::DiagnosticSeverity Severity = DI.getSeverity();
715  // Get the diagnostic ID based.
716  switch (DI.getKind()) {
717  case llvm::DK_InlineAsm:
718  if (InlineAsmDiagHandler(cast<DiagnosticInfoInlineAsm>(DI)))
719  return;
720  ComputeDiagID(Severity, inline_asm, DiagID);
721  break;
722  case llvm::DK_StackSize:
723  if (StackSizeDiagHandler(cast<DiagnosticInfoStackSize>(DI)))
724  return;
725  ComputeDiagID(Severity, backend_frame_larger_than, DiagID);
726  break;
727  case DK_Linker:
728  assert(CurLinkModule);
729  // FIXME: stop eating the warnings and notes.
730  if (Severity != DS_Error)
731  return;
732  DiagID = diag::err_fe_cannot_link_module;
733  break;
734  case llvm::DK_OptimizationRemark:
735  // Optimization remarks are always handled completely by this
736  // handler. There is no generic way of emitting them.
737  OptimizationRemarkHandler(cast<OptimizationRemark>(DI));
738  return;
739  case llvm::DK_OptimizationRemarkMissed:
740  // Optimization remarks are always handled completely by this
741  // handler. There is no generic way of emitting them.
742  OptimizationRemarkHandler(cast<OptimizationRemarkMissed>(DI));
743  return;
744  case llvm::DK_OptimizationRemarkAnalysis:
745  // Optimization remarks are always handled completely by this
746  // handler. There is no generic way of emitting them.
747  OptimizationRemarkHandler(cast<OptimizationRemarkAnalysis>(DI));
748  return;
749  case llvm::DK_OptimizationRemarkAnalysisFPCommute:
750  // Optimization remarks are always handled completely by this
751  // handler. There is no generic way of emitting them.
752  OptimizationRemarkHandler(cast<OptimizationRemarkAnalysisFPCommute>(DI));
753  return;
754  case llvm::DK_OptimizationRemarkAnalysisAliasing:
755  // Optimization remarks are always handled completely by this
756  // handler. There is no generic way of emitting them.
757  OptimizationRemarkHandler(cast<OptimizationRemarkAnalysisAliasing>(DI));
758  return;
759  case llvm::DK_MachineOptimizationRemark:
760  // Optimization remarks are always handled completely by this
761  // handler. There is no generic way of emitting them.
762  OptimizationRemarkHandler(cast<MachineOptimizationRemark>(DI));
763  return;
764  case llvm::DK_MachineOptimizationRemarkMissed:
765  // Optimization remarks are always handled completely by this
766  // handler. There is no generic way of emitting them.
767  OptimizationRemarkHandler(cast<MachineOptimizationRemarkMissed>(DI));
768  return;
769  case llvm::DK_MachineOptimizationRemarkAnalysis:
770  // Optimization remarks are always handled completely by this
771  // handler. There is no generic way of emitting them.
772  OptimizationRemarkHandler(cast<MachineOptimizationRemarkAnalysis>(DI));
773  return;
774  case llvm::DK_OptimizationFailure:
775  // Optimization failures are always handled completely by this
776  // handler.
777  OptimizationFailureHandler(cast<DiagnosticInfoOptimizationFailure>(DI));
778  return;
779  case llvm::DK_Unsupported:
780  UnsupportedDiagHandler(cast<DiagnosticInfoUnsupported>(DI));
781  return;
782  default:
783  // Plugin IDs are not bound to any value as they are set dynamically.
784  ComputeDiagRemarkID(Severity, backend_plugin, DiagID);
785  break;
786  }
787  std::string MsgStorage;
788  {
789  raw_string_ostream Stream(MsgStorage);
790  DiagnosticPrinterRawOStream DP(Stream);
791  DI.print(DP);
792  }
793 
794  if (DiagID == diag::err_fe_cannot_link_module) {
795  Diags.Report(diag::err_fe_cannot_link_module)
796  << CurLinkModule->getModuleIdentifier() << MsgStorage;
797  return;
798  }
799 
800  // Report the backend message using the usual diagnostic mechanism.
801  FullSourceLoc Loc;
802  Diags.Report(Loc, DiagID).AddString(MsgStorage);
803 }
804 #undef ComputeDiagID
805 
806 CodeGenAction::CodeGenAction(unsigned _Act, LLVMContext *_VMContext)
807  : Act(_Act), VMContext(_VMContext ? _VMContext : new LLVMContext),
808  OwnsVMContext(!_VMContext) {}
809 
811  TheModule.reset();
812  if (OwnsVMContext)
813  delete VMContext;
814 }
815 
816 bool CodeGenAction::hasIRSupport() const { return true; }
817 
819  // If the consumer creation failed, do nothing.
820  if (!getCompilerInstance().hasASTConsumer())
821  return;
822 
823  // Steal the module from the consumer.
824  TheModule = BEConsumer->takeModule();
825 }
826 
827 std::unique_ptr<llvm::Module> CodeGenAction::takeModule() {
828  return std::move(TheModule);
829 }
830 
831 llvm::LLVMContext *CodeGenAction::takeLLVMContext() {
832  OwnsVMContext = false;
833  return VMContext;
834 }
835 
836 static std::unique_ptr<raw_pwrite_stream>
837 GetOutputStream(CompilerInstance &CI, StringRef InFile, BackendAction Action) {
838  switch (Action) {
840  return CI.createDefaultOutputFile(false, InFile, "s");
841  case Backend_EmitLL:
842  return CI.createDefaultOutputFile(false, InFile, "ll");
843  case Backend_EmitBC:
844  return CI.createDefaultOutputFile(true, InFile, "bc");
845  case Backend_EmitNothing:
846  return nullptr;
847  case Backend_EmitMCNull:
848  return CI.createNullOutputFile();
849  case Backend_EmitObj:
850  return CI.createDefaultOutputFile(true, InFile, "o");
851  }
852 
853  llvm_unreachable("Invalid action!");
854 }
855 
856 std::unique_ptr<ASTConsumer>
858  BackendAction BA = static_cast<BackendAction>(Act);
859  std::unique_ptr<raw_pwrite_stream> OS = CI.takeOutputStream();
860  if (!OS)
861  OS = GetOutputStream(CI, InFile, BA);
862 
863  if (BA != Backend_EmitNothing && !OS)
864  return nullptr;
865 
866  // Load bitcode modules to link with, if we need to.
867  if (LinkModules.empty())
868  for (const CodeGenOptions::BitcodeFileToLink &F :
870  auto BCBuf = CI.getFileManager().getBufferForFile(F.Filename);
871  if (!BCBuf) {
872  CI.getDiagnostics().Report(diag::err_cannot_open_file)
873  << F.Filename << BCBuf.getError().message();
874  LinkModules.clear();
875  return nullptr;
876  }
877 
879  getOwningLazyBitcodeModule(std::move(*BCBuf), *VMContext);
880  if (!ModuleOrErr) {
881  handleAllErrors(ModuleOrErr.takeError(), [&](ErrorInfoBase &EIB) {
882  CI.getDiagnostics().Report(diag::err_cannot_open_file)
883  << F.Filename << EIB.message();
884  });
885  LinkModules.clear();
886  return nullptr;
887  }
888  LinkModules.push_back({std::move(ModuleOrErr.get()), F.PropagateAttrs,
889  F.Internalize, F.LinkFlags});
890  }
891 
892  CoverageSourceInfo *CoverageInfo = nullptr;
893  // Add the preprocessor callback only when the coverage mapping is generated.
894  if (CI.getCodeGenOpts().CoverageMapping) {
895  CoverageInfo = new CoverageSourceInfo;
897  std::unique_ptr<PPCallbacks>(CoverageInfo));
898  }
899 
900  std::unique_ptr<BackendConsumer> Result(new BackendConsumer(
901  BA, CI.getDiagnostics(), CI.getHeaderSearchOpts(),
903  CI.getLangOpts(), CI.getFrontendOpts().ShowTimers, InFile,
904  std::move(LinkModules), std::move(OS), *VMContext, CoverageInfo));
905  BEConsumer = Result.get();
906 
907  // Enable generating macro debug info only when debug info is not disabled and
908  // also macro debug info is enabled.
909  if (CI.getCodeGenOpts().getDebugInfo() != codegenoptions::NoDebugInfo &&
910  CI.getCodeGenOpts().MacroDebugInfo) {
911  std::unique_ptr<PPCallbacks> Callbacks =
912  llvm::make_unique<MacroPPCallbacks>(BEConsumer->getCodeGenerator(),
913  CI.getPreprocessor());
914  CI.getPreprocessor().addPPCallbacks(std::move(Callbacks));
915  }
916 
917  return std::move(Result);
918 }
919 
920 static void BitcodeInlineAsmDiagHandler(const llvm::SMDiagnostic &SM,
921  void *Context,
922  unsigned LocCookie) {
923  SM.print(nullptr, llvm::errs());
924 
925  auto Diags = static_cast<DiagnosticsEngine *>(Context);
926  unsigned DiagID;
927  switch (SM.getKind()) {
928  case llvm::SourceMgr::DK_Error:
929  DiagID = diag::err_fe_inline_asm;
930  break;
931  case llvm::SourceMgr::DK_Warning:
932  DiagID = diag::warn_fe_inline_asm;
933  break;
934  case llvm::SourceMgr::DK_Note:
935  DiagID = diag::note_fe_inline_asm;
936  break;
937  case llvm::SourceMgr::DK_Remark:
938  llvm_unreachable("remarks unexpected");
939  }
940 
941  Diags->Report(DiagID).AddString("cannot compile inline asm");
942 }
943 
944 std::unique_ptr<llvm::Module>
945 CodeGenAction::loadModule(MemoryBufferRef MBRef) {
948 
949  // For ThinLTO backend invocations, ensure that the context
950  // merges types based on ODR identifiers. We also need to read
951  // the correct module out of a multi-module bitcode file.
952  if (!CI.getCodeGenOpts().ThinLTOIndexFile.empty()) {
953  VMContext->enableDebugTypeODRUniquing();
954 
955  auto DiagErrors = [&](Error E) -> std::unique_ptr<llvm::Module> {
956  unsigned DiagID =
958  handleAllErrors(std::move(E), [&](ErrorInfoBase &EIB) {
959  CI.getDiagnostics().Report(DiagID) << EIB.message();
960  });
961  return {};
962  };
963 
964  Expected<std::vector<BitcodeModule>> BMsOrErr = getBitcodeModuleList(MBRef);
965  if (!BMsOrErr)
966  return DiagErrors(BMsOrErr.takeError());
967  BitcodeModule *Bm = FindThinLTOModule(*BMsOrErr);
968  // We have nothing to do if the file contains no ThinLTO module. This is
969  // possible if ThinLTO compilation was not able to split module. Content of
970  // the file was already processed by indexing and will be passed to the
971  // linker using merged object file.
972  if (!Bm) {
973  auto M = llvm::make_unique<llvm::Module>("empty", *VMContext);
974  M->setTargetTriple(CI.getTargetOpts().Triple);
975  return M;
976  }
978  Bm->parseModule(*VMContext);
979  if (!MOrErr)
980  return DiagErrors(MOrErr.takeError());
981  return std::move(*MOrErr);
982  }
983 
984  llvm::SMDiagnostic Err;
985  if (std::unique_ptr<llvm::Module> M = parseIR(MBRef, Err, *VMContext))
986  return M;
987 
988  // Translate from the diagnostic info to the SourceManager location if
989  // available.
990  // TODO: Unify this with ConvertBackendLocation()
991  SourceLocation Loc;
992  if (Err.getLineNo() > 0) {
993  assert(Err.getColumnNo() >= 0);
995  Err.getLineNo(), Err.getColumnNo() + 1);
996  }
997 
998  // Strip off a leading diagnostic code if there is one.
999  StringRef Msg = Err.getMessage();
1000  if (Msg.startswith("error: "))
1001  Msg = Msg.substr(7);
1002 
1003  unsigned DiagID =
1005 
1006  CI.getDiagnostics().Report(Loc, DiagID) << Msg;
1007  return {};
1008 }
1009 
1011  // If this is an IR file, we have to treat it specially.
1012  if (getCurrentFileKind().getLanguage() == InputKind::LLVM_IR) {
1013  BackendAction BA = static_cast<BackendAction>(Act);
1015  std::unique_ptr<raw_pwrite_stream> OS =
1016  GetOutputStream(CI, getCurrentFile(), BA);
1017  if (BA != Backend_EmitNothing && !OS)
1018  return;
1019 
1020  bool Invalid;
1022  FileID FID = SM.getMainFileID();
1023  const llvm::MemoryBuffer *MainFile = SM.getBuffer(FID, &Invalid);
1024  if (Invalid)
1025  return;
1026 
1027  TheModule = loadModule(*MainFile);
1028  if (!TheModule)
1029  return;
1030 
1031  const TargetOptions &TargetOpts = CI.getTargetOpts();
1032  if (TheModule->getTargetTriple() != TargetOpts.Triple) {
1034  diag::warn_fe_override_module)
1035  << TargetOpts.Triple;
1036  TheModule->setTargetTriple(TargetOpts.Triple);
1037  }
1038 
1039  EmbedBitcode(TheModule.get(), CI.getCodeGenOpts(),
1040  MainFile->getMemBufferRef());
1041 
1042  LLVMContext &Ctx = TheModule->getContext();
1043  Ctx.setInlineAsmDiagnosticHandler(BitcodeInlineAsmDiagHandler,
1044  &CI.getDiagnostics());
1045 
1047  CI.getCodeGenOpts(), TargetOpts, CI.getLangOpts(),
1048  CI.getTarget().getDataLayout(), TheModule.get(), BA,
1049  std::move(OS));
1050  return;
1051  }
1052 
1053  // Otherwise follow the normal AST path.
1055 }
1056 
1057 //
1058 
1059 void EmitAssemblyAction::anchor() { }
1060 EmitAssemblyAction::EmitAssemblyAction(llvm::LLVMContext *_VMContext)
1061  : CodeGenAction(Backend_EmitAssembly, _VMContext) {}
1062 
1063 void EmitBCAction::anchor() { }
1064 EmitBCAction::EmitBCAction(llvm::LLVMContext *_VMContext)
1065  : CodeGenAction(Backend_EmitBC, _VMContext) {}
1066 
1067 void EmitLLVMAction::anchor() { }
1068 EmitLLVMAction::EmitLLVMAction(llvm::LLVMContext *_VMContext)
1069  : CodeGenAction(Backend_EmitLL, _VMContext) {}
1070 
1071 void EmitLLVMOnlyAction::anchor() { }
1072 EmitLLVMOnlyAction::EmitLLVMOnlyAction(llvm::LLVMContext *_VMContext)
1073  : CodeGenAction(Backend_EmitNothing, _VMContext) {}
1074 
1075 void EmitCodeGenOnlyAction::anchor() { }
1076 EmitCodeGenOnlyAction::EmitCodeGenOnlyAction(llvm::LLVMContext *_VMContext)
1077  : CodeGenAction(Backend_EmitMCNull, _VMContext) {}
1078 
1079 void EmitObjAction::anchor() { }
1080 EmitObjAction::EmitObjAction(llvm::LLVMContext *_VMContext)
1081  : 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...
Represents a function declaration or definition.
Definition: Decl.h:1748
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:875
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:33
Defines the clang::FileManager interface and associated types.
Emit human-readable LLVM assembly.
Definition: BackendUtil.h:33
DominatorTree GraphTraits specialization so the DominatorTree can be iterable by generic graph iterat...
Definition: Dominators.h:29
Run CodeGen, but don&#39;t emit anything.
Definition: BackendUtil.h:35
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:88
bool HandleTopLevelDecl(DeclGroupRef D) override
HandleTopLevelDecl - Handle the specified top-level declaration.
friend class BackendConsumer
Definition: CodeGenAction.h:26
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:1296
const TargetInfo & getTargetInfo() const
Definition: ASTContext.h:693
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:34
Represents a variable declaration or definition.
Definition: Decl.h:812
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:79
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:154
Emit LLVM bitcode files.
Definition: BackendUtil.h:32
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:2261
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:49
BackendAction
Definition: BackendUtil.h:30
CompilerInstance & getCompilerInstance() const
FrontendOptions & getFrontendOpts()
Concrete class used by the front-end to report problems and issues.
Definition: Diagnostic.h:148
iterator begin()
Definition: DeclGroup.h:99
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:43
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:1044
BackendConsumer * BEConsumer
Definition: CodeGenAction.h:80
StringRef Filename
Definition: Format.cpp:1709
EmitLLVMAction(llvm::LLVMContext *_VMContext=nullptr)
unsigned Offset
Definition: Format.cpp:1711
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:36
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:1570
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:31
void UnsupportedDiagHandler(const llvm::DiagnosticInfoUnsupported &D)
Specialized handler for unsupported backend feature diagnostic.
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.
std::unique_ptr< llvm::raw_pwrite_stream > takeOutputStream()
LLVM IR: we accept this so that we can run the optimizer on it, and compile it to assembly or object ...
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3090
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:987
#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:777
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...
const llvm::MemoryBuffer * getBuffer(FileID FID, SourceLocation Loc, bool *Invalid=nullptr) const
Return the buffer for the specified FileID.
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.
bool FrontendTimesIsEnabled
If the user specifies the -ftime-report argument on an Clang command line then the value of this bool...
FileID getMainFileID() const
Returns the FileID of the main source file.
StringRef getCurrentFile() const
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:665
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:300
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.
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()
void addPPCallbacks(std::unique_ptr< PPCallbacks > C)
Definition: Preprocessor.h:995
This class handles loading and caching of source files into memory.
PrettyStackTraceDecl - If a crash occurs, indicate that it happened when doing something to a specifi...
Definition: DeclBase.h:1178