clang  9.0.0svn
SemaAttr.cpp
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1 //===--- SemaAttr.cpp - Semantic Analysis for Attributes ------------------===//
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 //
9 // This file implements semantic analysis for non-trivial attributes and
10 // pragmas.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "clang/AST/ASTConsumer.h"
15 #include "clang/AST/Attr.h"
16 #include "clang/AST/Expr.h"
17 #include "clang/Basic/TargetInfo.h"
18 #include "clang/Lex/Preprocessor.h"
19 #include "clang/Sema/Lookup.h"
21 using namespace clang;
22 
23 //===----------------------------------------------------------------------===//
24 // Pragma 'pack' and 'options align'
25 //===----------------------------------------------------------------------===//
26 
28  StringRef SlotLabel,
29  bool ShouldAct)
30  : S(S), SlotLabel(SlotLabel), ShouldAct(ShouldAct) {
31  if (ShouldAct) {
33  S.DataSegStack.SentinelAction(PSK_Push, SlotLabel);
34  S.BSSSegStack.SentinelAction(PSK_Push, SlotLabel);
35  S.ConstSegStack.SentinelAction(PSK_Push, SlotLabel);
36  S.CodeSegStack.SentinelAction(PSK_Push, SlotLabel);
37  }
38 }
39 
41  if (ShouldAct) {
42  S.VtorDispStack.SentinelAction(PSK_Pop, SlotLabel);
43  S.DataSegStack.SentinelAction(PSK_Pop, SlotLabel);
44  S.BSSSegStack.SentinelAction(PSK_Pop, SlotLabel);
45  S.ConstSegStack.SentinelAction(PSK_Pop, SlotLabel);
46  S.CodeSegStack.SentinelAction(PSK_Pop, SlotLabel);
47  }
48 }
49 
51  // If there is no pack value, we don't need any attributes.
53  return;
54 
55  // Otherwise, check to see if we need a max field alignment attribute.
56  if (unsigned Alignment = PackStack.CurrentValue) {
57  if (Alignment == Sema::kMac68kAlignmentSentinel)
58  RD->addAttr(AlignMac68kAttr::CreateImplicit(Context));
59  else
60  RD->addAttr(MaxFieldAlignmentAttr::CreateImplicit(Context,
61  Alignment * 8));
62  }
63  if (PackIncludeStack.empty())
64  return;
65  // The #pragma pack affected a record in an included file, so Clang should
66  // warn when that pragma was written in a file that included the included
67  // file.
68  for (auto &PackedInclude : llvm::reverse(PackIncludeStack)) {
69  if (PackedInclude.CurrentPragmaLocation != PackStack.CurrentPragmaLocation)
70  break;
71  if (PackedInclude.HasNonDefaultValue)
72  PackedInclude.ShouldWarnOnInclude = true;
73  }
74 }
75 
77  if (MSStructPragmaOn)
78  RD->addAttr(MSStructAttr::CreateImplicit(Context));
79 
80  // FIXME: We should merge AddAlignmentAttributesForRecord with
81  // AddMsStructLayoutForRecord into AddPragmaAttributesForRecord, which takes
82  // all active pragmas and applies them as attributes to class definitions.
83  if (VtorDispStack.CurrentValue != getLangOpts().VtorDispMode)
84  RD->addAttr(
85  MSVtorDispAttr::CreateImplicit(Context, VtorDispStack.CurrentValue));
86 }
87 
89  SourceLocation PragmaLoc) {
91  unsigned Alignment = 0;
92  switch (Kind) {
93  // For all targets we support native and natural are the same.
94  //
95  // FIXME: This is not true on Darwin/PPC.
96  case POAK_Native:
97  case POAK_Power:
98  case POAK_Natural:
99  Action = Sema::PSK_Push_Set;
100  Alignment = 0;
101  break;
102 
103  // Note that '#pragma options align=packed' is not equivalent to attribute
104  // packed, it has a different precedence relative to attribute aligned.
105  case POAK_Packed:
106  Action = Sema::PSK_Push_Set;
107  Alignment = 1;
108  break;
109 
110  case POAK_Mac68k:
111  // Check if the target supports this.
113  Diag(PragmaLoc, diag::err_pragma_options_align_mac68k_target_unsupported);
114  return;
115  }
116  Action = Sema::PSK_Push_Set;
117  Alignment = Sema::kMac68kAlignmentSentinel;
118  break;
119 
120  case POAK_Reset:
121  // Reset just pops the top of the stack, or resets the current alignment to
122  // default.
123  Action = Sema::PSK_Pop;
124  if (PackStack.Stack.empty()) {
125  if (PackStack.CurrentValue) {
126  Action = Sema::PSK_Reset;
127  } else {
128  Diag(PragmaLoc, diag::warn_pragma_options_align_reset_failed)
129  << "stack empty";
130  return;
131  }
132  }
133  break;
134  }
135 
136  PackStack.Act(PragmaLoc, Action, StringRef(), Alignment);
137 }
138 
140  PragmaClangSectionKind SecKind, StringRef SecName) {
141  PragmaClangSection *CSec;
142  switch (SecKind) {
143  case PragmaClangSectionKind::PCSK_BSS:
144  CSec = &PragmaClangBSSSection;
145  break;
146  case PragmaClangSectionKind::PCSK_Data:
147  CSec = &PragmaClangDataSection;
148  break;
149  case PragmaClangSectionKind::PCSK_Rodata:
150  CSec = &PragmaClangRodataSection;
151  break;
152  case PragmaClangSectionKind::PCSK_Text:
153  CSec = &PragmaClangTextSection;
154  break;
155  default:
156  llvm_unreachable("invalid clang section kind");
157  }
158 
159  if (Action == PragmaClangSectionAction::PCSA_Clear) {
160  CSec->Valid = false;
161  return;
162  }
163 
164  CSec->Valid = true;
165  CSec->SectionName = SecName;
166  CSec->PragmaLocation = PragmaLoc;
167 }
168 
170  StringRef SlotLabel, Expr *alignment) {
171  Expr *Alignment = static_cast<Expr *>(alignment);
172 
173  // If specified then alignment must be a "small" power of two.
174  unsigned AlignmentVal = 0;
175  if (Alignment) {
176  llvm::APSInt Val;
177 
178  // pack(0) is like pack(), which just works out since that is what
179  // we use 0 for in PackAttr.
180  if (Alignment->isTypeDependent() ||
181  Alignment->isValueDependent() ||
182  !Alignment->isIntegerConstantExpr(Val, Context) ||
183  !(Val == 0 || Val.isPowerOf2()) ||
184  Val.getZExtValue() > 16) {
185  Diag(PragmaLoc, diag::warn_pragma_pack_invalid_alignment);
186  return; // Ignore
187  }
188 
189  AlignmentVal = (unsigned) Val.getZExtValue();
190  }
191  if (Action == Sema::PSK_Show) {
192  // Show the current alignment, making sure to show the right value
193  // for the default.
194  // FIXME: This should come from the target.
195  AlignmentVal = PackStack.CurrentValue;
196  if (AlignmentVal == 0)
197  AlignmentVal = 8;
198  if (AlignmentVal == Sema::kMac68kAlignmentSentinel)
199  Diag(PragmaLoc, diag::warn_pragma_pack_show) << "mac68k";
200  else
201  Diag(PragmaLoc, diag::warn_pragma_pack_show) << AlignmentVal;
202  }
203  // MSDN, C/C++ Preprocessor Reference > Pragma Directives > pack:
204  // "#pragma pack(pop, identifier, n) is undefined"
205  if (Action & Sema::PSK_Pop) {
206  if (Alignment && !SlotLabel.empty())
207  Diag(PragmaLoc, diag::warn_pragma_pack_pop_identifier_and_alignment);
208  if (PackStack.Stack.empty())
209  Diag(PragmaLoc, diag::warn_pragma_pop_failed) << "pack" << "stack empty";
210  }
211 
212  PackStack.Act(PragmaLoc, Action, SlotLabel, AlignmentVal);
213 }
214 
216  SourceLocation IncludeLoc) {
219  // Warn about non-default alignment at #includes (without redundant
220  // warnings for the same directive in nested includes).
221  // The warning is delayed until the end of the file to avoid warnings
222  // for files that don't have any records that are affected by the modified
223  // alignment.
224  bool HasNonDefaultValue =
225  PackStack.hasValue() &&
226  (PackIncludeStack.empty() ||
227  PackIncludeStack.back().CurrentPragmaLocation != PrevLocation);
228  PackIncludeStack.push_back(
230  PackStack.hasValue() ? PrevLocation : SourceLocation(),
231  HasNonDefaultValue, /*ShouldWarnOnInclude*/ false});
232  return;
233  }
234 
235  assert(Kind == PragmaPackDiagnoseKind::ChangedStateAtExit && "invalid kind");
236  PackIncludeState PrevPackState = PackIncludeStack.pop_back_val();
237  if (PrevPackState.ShouldWarnOnInclude) {
238  // Emit the delayed non-default alignment at #include warning.
239  Diag(IncludeLoc, diag::warn_pragma_pack_non_default_at_include);
240  Diag(PrevPackState.CurrentPragmaLocation, diag::note_pragma_pack_here);
241  }
242  // Warn about modified alignment after #includes.
243  if (PrevPackState.CurrentValue != PackStack.CurrentValue) {
244  Diag(IncludeLoc, diag::warn_pragma_pack_modified_after_include);
245  Diag(PackStack.CurrentPragmaLocation, diag::note_pragma_pack_here);
246  }
247 }
248 
250  if (PackStack.Stack.empty())
251  return;
252  bool IsInnermost = true;
253  for (const auto &StackSlot : llvm::reverse(PackStack.Stack)) {
254  Diag(StackSlot.PragmaPushLocation, diag::warn_pragma_pack_no_pop_eof);
255  // The user might have already reset the alignment, so suggest replacing
256  // the reset with a pop.
257  if (IsInnermost && PackStack.CurrentValue == PackStack.DefaultValue) {
259  diag::note_pragma_pack_pop_instead_reset);
262  /*SkipTrailing=*/false);
263  if (FixItLoc.isValid())
264  DB << FixItHint::CreateInsertion(FixItLoc, "pop");
265  }
266  IsInnermost = false;
267  }
268 }
269 
271  MSStructPragmaOn = (Kind == PMSST_ON);
272 }
273 
275  PragmaMSCommentKind Kind, StringRef Arg) {
276  auto *PCD = PragmaCommentDecl::Create(
277  Context, Context.getTranslationUnitDecl(), CommentLoc, Kind, Arg);
280 }
281 
283  StringRef Value) {
288 }
289 
291  LangOptions::PragmaMSPointersToMembersKind RepresentationMethod,
292  SourceLocation PragmaLoc) {
293  MSPointerToMemberRepresentationMethod = RepresentationMethod;
294  ImplicitMSInheritanceAttrLoc = PragmaLoc;
295 }
296 
298  SourceLocation PragmaLoc,
299  MSVtorDispAttr::Mode Mode) {
300  if (Action & PSK_Pop && VtorDispStack.Stack.empty())
301  Diag(PragmaLoc, diag::warn_pragma_pop_failed) << "vtordisp"
302  << "stack empty";
303  VtorDispStack.Act(PragmaLoc, Action, StringRef(), Mode);
304 }
305 
306 template<typename ValueType>
308  PragmaMsStackAction Action,
309  llvm::StringRef StackSlotLabel,
310  ValueType Value) {
311  if (Action == PSK_Reset) {
312  CurrentValue = DefaultValue;
313  CurrentPragmaLocation = PragmaLocation;
314  return;
315  }
316  if (Action & PSK_Push)
317  Stack.emplace_back(StackSlotLabel, CurrentValue, CurrentPragmaLocation,
318  PragmaLocation);
319  else if (Action & PSK_Pop) {
320  if (!StackSlotLabel.empty()) {
321  // If we've got a label, try to find it and jump there.
322  auto I = llvm::find_if(llvm::reverse(Stack), [&](const Slot &x) {
323  return x.StackSlotLabel == StackSlotLabel;
324  });
325  // If we found the label so pop from there.
326  if (I != Stack.rend()) {
327  CurrentValue = I->Value;
328  CurrentPragmaLocation = I->PragmaLocation;
329  Stack.erase(std::prev(I.base()), Stack.end());
330  }
331  } else if (!Stack.empty()) {
332  // We do not have a label, just pop the last entry.
333  CurrentValue = Stack.back().Value;
334  CurrentPragmaLocation = Stack.back().PragmaLocation;
335  Stack.pop_back();
336  }
337  }
338  if (Action & PSK_Set) {
339  CurrentValue = Value;
340  CurrentPragmaLocation = PragmaLocation;
341  }
342 }
343 
344 bool Sema::UnifySection(StringRef SectionName,
345  int SectionFlags,
346  DeclaratorDecl *Decl) {
347  auto Section = Context.SectionInfos.find(SectionName);
348  if (Section == Context.SectionInfos.end()) {
349  Context.SectionInfos[SectionName] =
350  ASTContext::SectionInfo(Decl, SourceLocation(), SectionFlags);
351  return false;
352  }
353  // A pre-declared section takes precedence w/o diagnostic.
354  if (Section->second.SectionFlags == SectionFlags ||
355  !(Section->second.SectionFlags & ASTContext::PSF_Implicit))
356  return false;
357  auto OtherDecl = Section->second.Decl;
358  Diag(Decl->getLocation(), diag::err_section_conflict)
359  << Decl << OtherDecl;
360  Diag(OtherDecl->getLocation(), diag::note_declared_at)
361  << OtherDecl->getName();
362  if (auto A = Decl->getAttr<SectionAttr>())
363  if (A->isImplicit())
364  Diag(A->getLocation(), diag::note_pragma_entered_here);
365  if (auto A = OtherDecl->getAttr<SectionAttr>())
366  if (A->isImplicit())
367  Diag(A->getLocation(), diag::note_pragma_entered_here);
368  return true;
369 }
370 
371 bool Sema::UnifySection(StringRef SectionName,
372  int SectionFlags,
373  SourceLocation PragmaSectionLocation) {
374  auto Section = Context.SectionInfos.find(SectionName);
375  if (Section != Context.SectionInfos.end()) {
376  if (Section->second.SectionFlags == SectionFlags)
377  return false;
378  if (!(Section->second.SectionFlags & ASTContext::PSF_Implicit)) {
379  Diag(PragmaSectionLocation, diag::err_section_conflict)
380  << "this" << "a prior #pragma section";
381  Diag(Section->second.PragmaSectionLocation,
382  diag::note_pragma_entered_here);
383  return true;
384  }
385  }
386  Context.SectionInfos[SectionName] =
387  ASTContext::SectionInfo(nullptr, PragmaSectionLocation, SectionFlags);
388  return false;
389 }
390 
391 /// Called on well formed \#pragma bss_seg().
393  PragmaMsStackAction Action,
394  llvm::StringRef StackSlotLabel,
395  StringLiteral *SegmentName,
396  llvm::StringRef PragmaName) {
398  llvm::StringSwitch<PragmaStack<StringLiteral *> *>(PragmaName)
399  .Case("data_seg", &DataSegStack)
400  .Case("bss_seg", &BSSSegStack)
401  .Case("const_seg", &ConstSegStack)
402  .Case("code_seg", &CodeSegStack);
403  if (Action & PSK_Pop && Stack->Stack.empty())
404  Diag(PragmaLocation, diag::warn_pragma_pop_failed) << PragmaName
405  << "stack empty";
406  if (SegmentName &&
407  !checkSectionName(SegmentName->getBeginLoc(), SegmentName->getString()))
408  return;
409  Stack->Act(PragmaLocation, Action, StackSlotLabel, SegmentName);
410 }
411 
412 /// Called on well formed \#pragma bss_seg().
414  int SectionFlags, StringLiteral *SegmentName) {
415  UnifySection(SegmentName->getString(), SectionFlags, PragmaLocation);
416 }
417 
419  StringLiteral *SegmentName) {
420  // There's no stack to maintain, so we just have a current section. When we
421  // see the default section, reset our current section back to null so we stop
422  // tacking on unnecessary attributes.
423  CurInitSeg = SegmentName->getString() == ".CRT$XCU" ? nullptr : SegmentName;
424  CurInitSegLoc = PragmaLocation;
425 }
426 
427 void Sema::ActOnPragmaUnused(const Token &IdTok, Scope *curScope,
428  SourceLocation PragmaLoc) {
429 
430  IdentifierInfo *Name = IdTok.getIdentifierInfo();
431  LookupResult Lookup(*this, Name, IdTok.getLocation(), LookupOrdinaryName);
432  LookupParsedName(Lookup, curScope, nullptr, true);
433 
434  if (Lookup.empty()) {
435  Diag(PragmaLoc, diag::warn_pragma_unused_undeclared_var)
436  << Name << SourceRange(IdTok.getLocation());
437  return;
438  }
439 
440  VarDecl *VD = Lookup.getAsSingle<VarDecl>();
441  if (!VD) {
442  Diag(PragmaLoc, diag::warn_pragma_unused_expected_var_arg)
443  << Name << SourceRange(IdTok.getLocation());
444  return;
445  }
446 
447  // Warn if this was used before being marked unused.
448  if (VD->isUsed())
449  Diag(PragmaLoc, diag::warn_used_but_marked_unused) << Name;
450 
451  VD->addAttr(UnusedAttr::CreateImplicit(Context, UnusedAttr::GNU_unused,
452  IdTok.getLocation()));
453 }
454 
457  if (!Loc.isValid()) return;
458 
459  // Don't add a redundant or conflicting attribute.
460  if (D->hasAttr<CFAuditedTransferAttr>() ||
461  D->hasAttr<CFUnknownTransferAttr>())
462  return;
463 
464  D->addAttr(CFAuditedTransferAttr::CreateImplicit(Context, Loc));
465 }
466 
467 namespace {
468 
470 getParentAttrMatcherRule(attr::SubjectMatchRule Rule) {
471  using namespace attr;
472  switch (Rule) {
473  default:
474  return None;
475 #define ATTR_MATCH_RULE(Value, Spelling, IsAbstract)
476 #define ATTR_MATCH_SUB_RULE(Value, Spelling, IsAbstract, Parent, IsNegated) \
477  case Value: \
478  return Parent;
479 #include "clang/Basic/AttrSubMatchRulesList.inc"
480  }
481 }
482 
483 bool isNegatedAttrMatcherSubRule(attr::SubjectMatchRule Rule) {
484  using namespace attr;
485  switch (Rule) {
486  default:
487  return false;
488 #define ATTR_MATCH_RULE(Value, Spelling, IsAbstract)
489 #define ATTR_MATCH_SUB_RULE(Value, Spelling, IsAbstract, Parent, IsNegated) \
490  case Value: \
491  return IsNegated;
492 #include "clang/Basic/AttrSubMatchRulesList.inc"
493  }
494 }
495 
496 CharSourceRange replacementRangeForListElement(const Sema &S,
497  SourceRange Range) {
498  // Make sure that the ',' is removed as well.
500  Range.getEnd(), tok::comma, S.getSourceManager(), S.getLangOpts(),
501  /*SkipTrailingWhitespaceAndNewLine=*/false);
502  if (AfterCommaLoc.isValid())
503  return CharSourceRange::getCharRange(Range.getBegin(), AfterCommaLoc);
504  else
505  return CharSourceRange::getTokenRange(Range);
506 }
507 
508 std::string
509 attrMatcherRuleListToString(ArrayRef<attr::SubjectMatchRule> Rules) {
510  std::string Result;
511  llvm::raw_string_ostream OS(Result);
512  for (const auto &I : llvm::enumerate(Rules)) {
513  if (I.index())
514  OS << (I.index() == Rules.size() - 1 ? ", and " : ", ");
515  OS << "'" << attr::getSubjectMatchRuleSpelling(I.value()) << "'";
516  }
517  return OS.str();
518 }
519 
520 } // end anonymous namespace
521 
523  ParsedAttr &Attribute, SourceLocation PragmaLoc,
525  Attribute.setIsPragmaClangAttribute();
526  SmallVector<attr::SubjectMatchRule, 4> SubjectMatchRules;
527  // Gather the subject match rules that are supported by the attribute.
529  StrictSubjectMatchRuleSet;
530  Attribute.getMatchRules(LangOpts, StrictSubjectMatchRuleSet);
531 
532  // Figure out which subject matching rules are valid.
533  if (StrictSubjectMatchRuleSet.empty()) {
534  // Check for contradicting match rules. Contradicting match rules are
535  // either:
536  // - a top-level rule and one of its sub-rules. E.g. variable and
537  // variable(is_parameter).
538  // - a sub-rule and a sibling that's negated. E.g.
539  // variable(is_thread_local) and variable(unless(is_parameter))
540  llvm::SmallDenseMap<int, std::pair<int, SourceRange>, 2>
541  RulesToFirstSpecifiedNegatedSubRule;
542  for (const auto &Rule : Rules) {
543  attr::SubjectMatchRule MatchRule = attr::SubjectMatchRule(Rule.first);
545  getParentAttrMatcherRule(MatchRule);
546  if (!ParentRule)
547  continue;
548  auto It = Rules.find(*ParentRule);
549  if (It != Rules.end()) {
550  // A sub-rule contradicts a parent rule.
551  Diag(Rule.second.getBegin(),
552  diag::err_pragma_attribute_matcher_subrule_contradicts_rule)
554  << attr::getSubjectMatchRuleSpelling(*ParentRule) << It->second
556  replacementRangeForListElement(*this, Rule.second));
557  // Keep going without removing this rule as it won't change the set of
558  // declarations that receive the attribute.
559  continue;
560  }
561  if (isNegatedAttrMatcherSubRule(MatchRule))
562  RulesToFirstSpecifiedNegatedSubRule.insert(
563  std::make_pair(*ParentRule, Rule));
564  }
565  bool IgnoreNegatedSubRules = false;
566  for (const auto &Rule : Rules) {
567  attr::SubjectMatchRule MatchRule = attr::SubjectMatchRule(Rule.first);
569  getParentAttrMatcherRule(MatchRule);
570  if (!ParentRule)
571  continue;
572  auto It = RulesToFirstSpecifiedNegatedSubRule.find(*ParentRule);
573  if (It != RulesToFirstSpecifiedNegatedSubRule.end() &&
574  It->second != Rule) {
575  // Negated sub-rule contradicts another sub-rule.
576  Diag(
577  It->second.second.getBegin(),
578  diag::
579  err_pragma_attribute_matcher_negated_subrule_contradicts_subrule)
581  attr::SubjectMatchRule(It->second.first))
582  << attr::getSubjectMatchRuleSpelling(MatchRule) << Rule.second
584  replacementRangeForListElement(*this, It->second.second));
585  // Keep going but ignore all of the negated sub-rules.
586  IgnoreNegatedSubRules = true;
587  RulesToFirstSpecifiedNegatedSubRule.erase(It);
588  }
589  }
590 
591  if (!IgnoreNegatedSubRules) {
592  for (const auto &Rule : Rules)
593  SubjectMatchRules.push_back(attr::SubjectMatchRule(Rule.first));
594  } else {
595  for (const auto &Rule : Rules) {
596  if (!isNegatedAttrMatcherSubRule(attr::SubjectMatchRule(Rule.first)))
597  SubjectMatchRules.push_back(attr::SubjectMatchRule(Rule.first));
598  }
599  }
600  Rules.clear();
601  } else {
602  for (const auto &Rule : StrictSubjectMatchRuleSet) {
603  if (Rules.erase(Rule.first)) {
604  // Add the rule to the set of attribute receivers only if it's supported
605  // in the current language mode.
606  if (Rule.second)
607  SubjectMatchRules.push_back(Rule.first);
608  }
609  }
610  }
611 
612  if (!Rules.empty()) {
613  auto Diagnostic =
614  Diag(PragmaLoc, diag::err_pragma_attribute_invalid_matchers)
615  << Attribute.getName();
617  for (const auto &Rule : Rules) {
618  ExtraRules.push_back(attr::SubjectMatchRule(Rule.first));
620  replacementRangeForListElement(*this, Rule.second));
621  }
622  Diagnostic << attrMatcherRuleListToString(ExtraRules);
623  }
624 
625  if (PragmaAttributeStack.empty()) {
626  Diag(PragmaLoc, diag::err_pragma_attr_attr_no_push);
627  return;
628  }
629 
630  PragmaAttributeStack.back().Entries.push_back(
631  {PragmaLoc, &Attribute, std::move(SubjectMatchRules), /*IsUsed=*/false});
632 }
633 
635  const IdentifierInfo *Namespace) {
636  PragmaAttributeStack.emplace_back();
637  PragmaAttributeStack.back().Loc = PragmaLoc;
638  PragmaAttributeStack.back().Namespace = Namespace;
639 }
640 
642  const IdentifierInfo *Namespace) {
643  if (PragmaAttributeStack.empty()) {
644  Diag(PragmaLoc, diag::err_pragma_attribute_stack_mismatch) << 1;
645  return;
646  }
647 
648  // Dig back through the stack trying to find the most recently pushed group
649  // that in Namespace. Note that this works fine if no namespace is present,
650  // think of push/pops without namespaces as having an implicit "nullptr"
651  // namespace.
652  for (size_t Index = PragmaAttributeStack.size(); Index;) {
653  --Index;
654  if (PragmaAttributeStack[Index].Namespace == Namespace) {
655  for (const PragmaAttributeEntry &Entry :
656  PragmaAttributeStack[Index].Entries) {
657  if (!Entry.IsUsed) {
658  assert(Entry.Attribute && "Expected an attribute");
659  Diag(Entry.Attribute->getLoc(), diag::warn_pragma_attribute_unused)
660  << *Entry.Attribute;
661  Diag(PragmaLoc, diag::note_pragma_attribute_region_ends_here);
662  }
663  }
664  PragmaAttributeStack.erase(PragmaAttributeStack.begin() + Index);
665  return;
666  }
667  }
668 
669  if (Namespace)
670  Diag(PragmaLoc, diag::err_pragma_attribute_stack_mismatch)
671  << 0 << Namespace->getName();
672  else
673  Diag(PragmaLoc, diag::err_pragma_attribute_stack_mismatch) << 1;
674 }
675 
677  if (PragmaAttributeStack.empty())
678  return;
679  for (auto &Group : PragmaAttributeStack) {
680  for (auto &Entry : Group.Entries) {
681  ParsedAttr *Attribute = Entry.Attribute;
682  assert(Attribute && "Expected an attribute");
683  assert(Attribute->isPragmaClangAttribute() &&
684  "expected #pragma clang attribute");
685 
686  // Ensure that the attribute can be applied to the given declaration.
687  bool Applies = false;
688  for (const auto &Rule : Entry.MatchRules) {
689  if (Attribute->appliesToDecl(D, Rule)) {
690  Applies = true;
691  break;
692  }
693  }
694  if (!Applies)
695  continue;
696  Entry.IsUsed = true;
698  ParsedAttributesView Attrs;
699  Attrs.addAtEnd(Attribute);
700  ProcessDeclAttributeList(S, D, Attrs);
702  }
703  }
704 }
705 
707  assert(PragmaAttributeCurrentTargetDecl && "Expected an active declaration");
709  diag::note_pragma_attribute_applied_decl_here);
710 }
711 
713  if (PragmaAttributeStack.empty())
714  return;
715  Diag(PragmaAttributeStack.back().Loc, diag::err_pragma_attribute_no_pop_eof);
716 }
717 
718 void Sema::ActOnPragmaOptimize(bool On, SourceLocation PragmaLoc) {
719  if(On)
721  else
722  OptimizeOffPragmaLocation = PragmaLoc;
723 }
724 
726  // In the future, check other pragmas if they're implemented (e.g. pragma
727  // optimize 0 will probably map to this functionality too).
730 }
731 
733  SourceLocation Loc) {
734  // Don't add a conflicting attribute. No diagnostic is needed.
735  if (FD->hasAttr<MinSizeAttr>() || FD->hasAttr<AlwaysInlineAttr>())
736  return;
737 
738  // Add attributes only if required. Optnone requires noinline as well, but if
739  // either is already present then don't bother adding them.
740  if (!FD->hasAttr<OptimizeNoneAttr>())
741  FD->addAttr(OptimizeNoneAttr::CreateImplicit(Context, Loc));
742  if (!FD->hasAttr<NoInlineAttr>())
743  FD->addAttr(NoInlineAttr::CreateImplicit(Context, Loc));
744 }
745 
746 typedef std::vector<std::pair<unsigned, SourceLocation> > VisStack;
747 enum : unsigned { NoVisibility = ~0U };
748 
750  if (!VisContext)
751  return;
752 
753  NamedDecl *ND = dyn_cast<NamedDecl>(D);
755  return;
756 
757  VisStack *Stack = static_cast<VisStack*>(VisContext);
758  unsigned rawType = Stack->back().first;
759  if (rawType == NoVisibility) return;
760 
761  VisibilityAttr::VisibilityType type
762  = (VisibilityAttr::VisibilityType) rawType;
763  SourceLocation loc = Stack->back().second;
764 
765  D->addAttr(VisibilityAttr::CreateImplicit(Context, type, loc));
766 }
767 
768 /// FreeVisContext - Deallocate and null out VisContext.
770  delete static_cast<VisStack*>(VisContext);
771  VisContext = nullptr;
772 }
773 
774 static void PushPragmaVisibility(Sema &S, unsigned type, SourceLocation loc) {
775  // Put visibility on stack.
776  if (!S.VisContext)
777  S.VisContext = new VisStack;
778 
779  VisStack *Stack = static_cast<VisStack*>(S.VisContext);
780  Stack->push_back(std::make_pair(type, loc));
781 }
782 
784  SourceLocation PragmaLoc) {
785  if (VisType) {
786  // Compute visibility to use.
787  VisibilityAttr::VisibilityType T;
788  if (!VisibilityAttr::ConvertStrToVisibilityType(VisType->getName(), T)) {
789  Diag(PragmaLoc, diag::warn_attribute_unknown_visibility) << VisType;
790  return;
791  }
792  PushPragmaVisibility(*this, T, PragmaLoc);
793  } else {
794  PopPragmaVisibility(false, PragmaLoc);
795  }
796 }
797 
799  switch (FPC) {
800  case LangOptions::FPC_On:
802  break;
805  break;
808  break;
809  }
810 }
811 
813  switch (FPC) {
814  case LangOptions::FEA_On:
816  break;
819  break;
820  }
821 }
822 
823 
824 void Sema::PushNamespaceVisibilityAttr(const VisibilityAttr *Attr,
825  SourceLocation Loc) {
826  // Visibility calculations will consider the namespace's visibility.
827  // Here we just want to note that we're in a visibility context
828  // which overrides any enclosing #pragma context, but doesn't itself
829  // contribute visibility.
830  PushPragmaVisibility(*this, NoVisibility, Loc);
831 }
832 
833 void Sema::PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc) {
834  if (!VisContext) {
835  Diag(EndLoc, diag::err_pragma_pop_visibility_mismatch);
836  return;
837  }
838 
839  // Pop visibility from stack
840  VisStack *Stack = static_cast<VisStack*>(VisContext);
841 
842  const std::pair<unsigned, SourceLocation> *Back = &Stack->back();
843  bool StartsWithPragma = Back->first != NoVisibility;
844  if (StartsWithPragma && IsNamespaceEnd) {
845  Diag(Back->second, diag::err_pragma_push_visibility_mismatch);
846  Diag(EndLoc, diag::note_surrounding_namespace_ends_here);
847 
848  // For better error recovery, eat all pushes inside the namespace.
849  do {
850  Stack->pop_back();
851  Back = &Stack->back();
852  StartsWithPragma = Back->first != NoVisibility;
853  } while (StartsWithPragma);
854  } else if (!StartsWithPragma && !IsNamespaceEnd) {
855  Diag(EndLoc, diag::err_pragma_pop_visibility_mismatch);
856  Diag(Back->second, diag::note_surrounding_namespace_starts_here);
857  return;
858  }
859 
860  Stack->pop_back();
861  // To simplify the implementation, never keep around an empty stack.
862  if (Stack->empty())
863  FreeVisContext();
864 }
void ActOnPragmaAttributeEmptyPush(SourceLocation PragmaLoc, const IdentifierInfo *Namespace)
Definition: SemaAttr.cpp:634
PragmaStack< StringLiteral * > CodeSegStack
Definition: Sema.h:507
Represents a function declaration or definition.
Definition: Decl.h:1737
void ActOnPragmaAttributeAttribute(ParsedAttr &Attribute, SourceLocation PragmaLoc, attr::ParsedSubjectMatchRuleSet Rules)
Definition: SemaAttr.cpp:522
PragmaStackSentinelRAII(Sema &S, StringRef SlotLabel, bool ShouldAct)
Definition: SemaAttr.cpp:27
ASTConsumer & Consumer
Definition: Sema.h:359
void ActOnPragmaMSStruct(PragmaMSStructKind Kind)
ActOnPragmaMSStruct - Called on well formed #pragma ms_struct [on|off].
Definition: SemaAttr.cpp:270
void SentinelAction(PragmaMsStackAction Action, StringRef Label)
Definition: Sema.h:463
SmallVector< PackIncludeState, 8 > PackIncludeStack
Definition: Sema.h:502
PragmaStack< StringLiteral * > DataSegStack
Definition: Sema.h:504
Ordinary name lookup, which finds ordinary names (functions, variables, typedefs, etc...
Definition: Sema.h:3118
void ActOnPragmaMSSeg(SourceLocation PragmaLocation, PragmaMsStackAction Action, llvm::StringRef StackSlotLabel, StringLiteral *SegmentName, llvm::StringRef PragmaName)
Called on well formed #pragma bss_seg/data_seg/const_seg/code_seg.
Definition: SemaAttr.cpp:392
bool hasValue() const
Definition: Sema.h:473
static CharSourceRange getTokenRange(SourceRange R)
SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Emit a diagnostic.
Definition: Sema.h:1342
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:86
void ProcessDeclAttributeList(Scope *S, Decl *D, const ParsedAttributesView &AL, bool IncludeCXX11Attributes=true)
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: DeclBase.h:412
SourceLocation getPragmaARCCFCodeAuditedLoc() const
The location of the currently-active #pragma clang arc_cf_code_audited begin.
void ActOnPragmaMSVtorDisp(PragmaMsStackAction Action, SourceLocation PragmaLoc, MSVtorDispAttr::Mode Value)
Called on well formed #pragma vtordisp().
Definition: SemaAttr.cpp:297
PragmaOptionsAlignKind
Definition: Sema.h:8429
bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, bool AllowBuiltinCreation=false, bool EnteringContext=false)
Performs name lookup for a name that was parsed in the source code, and may contain a C++ scope speci...
DiagnosticBuilder Report(SourceLocation Loc, unsigned DiagID)
Issue the message to the client.
Definition: Diagnostic.h:1294
const TargetInfo & getTargetInfo() const
Definition: ASTContext.h:689
Represents a variable declaration or definition.
Definition: Decl.h:812
DiagnosticsEngine & Diags
Definition: Sema.h:360
PragmaClangSection PragmaClangBSSSection
Definition: Sema.h:416
Represents a struct/union/class.
Definition: Decl.h:3592
void FreeVisContext()
FreeVisContext - Deallocate and null out VisContext.
Definition: SemaAttr.cpp:769
One of these records is kept for each identifier that is lexed.
SubjectMatchRule
A list of all the recognized kinds of attributes.
void getMatchRules(const LangOptions &LangOpts, SmallVectorImpl< std::pair< attr::SubjectMatchRule, bool >> &MatchRules) const
Definition: ParsedAttr.cpp:216
bool checkSectionName(SourceLocation LiteralLoc, StringRef Str)
void ActOnPragmaAttributePop(SourceLocation PragmaLoc, const IdentifierInfo *Namespace)
Called on well-formed &#39;#pragma clang attribute pop&#39;.
Definition: SemaAttr.cpp:641
Token - This structure provides full information about a lexed token.
Definition: Token.h:34
static PragmaCommentDecl * Create(const ASTContext &C, TranslationUnitDecl *DC, SourceLocation CommentLoc, PragmaMSCommentKind CommentKind, StringRef Arg)
Definition: Decl.cpp:4319
static void PushPragmaVisibility(Sema &S, unsigned type, SourceLocation loc)
Definition: SemaAttr.cpp:774
void setIsPragmaClangAttribute()
Definition: ParsedAttr.h:446
void ActOnPragmaMSSection(SourceLocation PragmaLocation, int SectionFlags, StringLiteral *SegmentName)
Called on well formed #pragma section().
Definition: SemaAttr.cpp:413
Represents the results of name lookup.
Definition: Lookup.h:46
void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, SourceLocation PragmaLoc)
ActOnPragmaOptionsAlign - Called on well formed #pragma options align.
Definition: SemaAttr.cpp:88
bool UnifySection(StringRef SectionName, int SectionFlags, DeclaratorDecl *TheDecl)
Definition: SemaAttr.cpp:344
void AddPushedVisibilityAttribute(Decl *RD)
AddPushedVisibilityAttribute - If &#39;#pragma GCC visibility&#39; was used, add an appropriate visibility at...
Definition: SemaAttr.cpp:749
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:40
void ActOnPragmaFPContract(LangOptions::FPContractModeKind FPC)
ActOnPragmaFPContract - Called on well formed #pragma {STDC,OPENCL} FP_CONTRACT and #pragma clang fp ...
Definition: SemaAttr.cpp:798
PragmaPackDiagnoseKind
Definition: Sema.h:8451
void setAllowFPContractWithinStatement()
Definition: LangOptions.h:330
void ActOnPragmaDetectMismatch(SourceLocation Loc, StringRef Name, StringRef Value)
ActOnPragmaDetectMismatch - Call on well-formed #pragma detect_mismatch.
Definition: SemaAttr.cpp:282
Preprocessor & PP
Definition: Sema.h:357
const LangOptions & getLangOpts() const
Definition: Sema.h:1265
bool isTypeDependent() const
isTypeDependent - Determines whether this expression is type-dependent (C++ [temp.dep.expr]), which means that its type could change from one template instantiation to the next.
Definition: Expr.h:169
void addAtEnd(ParsedAttr *newAttr)
Definition: ParsedAttr.h:797
void DiagnoseNonDefaultPragmaPack(PragmaPackDiagnoseKind Kind, SourceLocation IncludeLoc)
Definition: SemaAttr.cpp:215
const LangOptions & LangOpts
Definition: Sema.h:356
void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc)
PopPragmaVisibility - Pop the top element of the visibility stack; used for &#39;#pragma GCC visibility&#39; ...
Definition: SemaAttr.cpp:833
void PrintPragmaAttributeInstantiationPoint()
Definition: SemaAttr.cpp:706
bool MSStructPragmaOn
Definition: Sema.h:380
bool hasAttr() const
Definition: DeclBase.h:533
llvm::StringMap< SectionInfo > SectionInfos
Definition: ASTContext.h:2973
Sema - This implements semantic analysis and AST building for C.
Definition: Sema.h:312
StringRef getString() const
Definition: Expr.h:1682
A little helper class used to produce diagnostics.
Definition: Diagnostic.h:1042
Represents a ValueDecl that came out of a declarator.
Definition: Decl.h:688
std::vector< std::pair< unsigned, SourceLocation > > VisStack
Definition: SemaAttr.cpp:746
const Decl * PragmaAttributeCurrentTargetDecl
The declaration that is currently receiving an attribute from the #pragma attribute stack...
Definition: Sema.h:553
void setDisallowFPContract()
Definition: LangOptions.h:338
This represents one expression.
Definition: Expr.h:108
Represents a character-granular source range.
static SourceLocation findLocationAfterToken(SourceLocation loc, tok::TokenKind TKind, const SourceManager &SM, const LangOptions &LangOpts, bool SkipTrailingWhitespaceAndNewLine)
Checks that the given token is the first token that occurs after the given location (this excludes co...
Definition: Lexer.cpp:1262
void ActOnPragmaMSInitSeg(SourceLocation PragmaLocation, StringLiteral *SegmentName)
Called on well-formed #pragma init_seg().
Definition: SemaAttr.cpp:418
SourceLocation getLocation() const
Return a source location identifier for the specified offset in the current file. ...
Definition: Token.h:123
Defines the clang::Preprocessor interface.
PragmaStack< StringLiteral * > BSSSegStack
Definition: Sema.h:505
PragmaClangSectionAction
Definition: Sema.h:401
void ActOnPragmaUnused(const Token &Identifier, Scope *curScope, SourceLocation PragmaLoc)
ActOnPragmaUnused - Called on well-formed &#39;#pragma unused&#39;.
Definition: SemaAttr.cpp:427
void ActOnPragmaMSComment(SourceLocation CommentLoc, PragmaMSCommentKind Kind, StringRef Arg)
ActOnPragmaMSComment - Called on well formed #pragma comment(kind, "arg").
Definition: SemaAttr.cpp:274
PragmaMSCommentKind
Definition: PragmaKinds.h:14
SourceLocation getEnd() const
bool hasAlignMac68kSupport() const
Check whether this target support &#39;#pragma options align=mac68k&#39;.
Definition: TargetInfo.h:696
void AddOptnoneAttributeIfNoConflicts(FunctionDecl *FD, SourceLocation Loc)
Adds the &#39;optnone&#39; attribute to the function declaration if there are no conflicts; Loc represents th...
Definition: SemaAttr.cpp:732
The result type of a method or function.
void DiagnoseUnterminatedPragmaPack()
Definition: SemaAttr.cpp:249
PragmaClangSectionKind
pragma clang section kind
Definition: Sema.h:393
static CharSourceRange getCharRange(SourceRange R)
void AddRangeBasedOptnone(FunctionDecl *FD)
Only called on function definitions; if there is a pragma in scope with the effect of a range-based o...
Definition: SemaAttr.cpp:725
StringLiteral * CurInitSeg
Last section used with #pragma init_seg.
Definition: Sema.h:526
Kind
Encodes a location in the source.
void Act(SourceLocation PragmaLocation, PragmaMsStackAction Action, llvm::StringRef StackSlotLabel, ValueType Value)
Definition: SemaAttr.cpp:307
SourceLocation CurrentPragmaLocation
Definition: Sema.h:478
const char * getSubjectMatchRuleSpelling(SubjectMatchRule Rule)
Definition: Attributes.cpp:27
void ActOnPragmaPack(SourceLocation PragmaLoc, PragmaMsStackAction Action, StringRef SlotLabel, Expr *Alignment)
ActOnPragmaPack - Called on well formed #pragma pack(...).
Definition: SemaAttr.cpp:169
IdentifierInfo * getIdentifierInfo() const
Definition: Token.h:176
ParsedAttr - Represents a syntactic attribute.
Definition: ParsedAttr.h:116
SourceLocation PragmaLocation
Definition: Sema.h:409
bool isValueDependent() const
isValueDependent - Determines whether this expression is value-dependent (C++ [temp.dep.constexpr]).
Definition: Expr.h:151
PragmaStack< MSVtorDispAttr::Mode > VtorDispStack
Whether to insert vtordisps prior to virtual bases in the Microsoft C++ ABI.
Definition: Sema.h:491
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Expr.h:1774
SourceLocation OptimizeOffPragmaLocation
This represents the last location of a "#pragma clang optimize off" directive if such a directive has...
Definition: Sema.h:558
void ActOnPragmaClangSection(SourceLocation PragmaLoc, PragmaClangSectionAction Action, PragmaClangSectionKind SecKind, StringRef SecName)
ActOnPragmaClangSection - Called on well formed #pragma clang section.
Definition: SemaAttr.cpp:139
bool isUsed(bool CheckUsedAttr=true) const
Whether any (re-)declaration of the entity was used, meaning that a definition is required...
Definition: DeclBase.cpp:396
StringRef getName() const
Return the actual identifier string.
Dataflow Directional Tag Classes.
bool isValid() const
Return true if this is a valid SourceLocation object.
SourceLocation ImplicitMSInheritanceAttrLoc
Source location for newly created implicit MSInheritanceAttrs.
Definition: Sema.h:390
void AddAlignmentAttributesForRecord(RecordDecl *RD)
AddAlignmentAttributesForRecord - Adds any needed alignment attributes to a the record decl...
Definition: SemaAttr.cpp:50
static PragmaDetectMismatchDecl * Create(const ASTContext &C, TranslationUnitDecl *DC, SourceLocation Loc, StringRef Name, StringRef Value)
Definition: Decl.cpp:4342
static FixItHint CreateRemoval(CharSourceRange RemoveRange)
Create a code modification hint that removes the given source range.
Definition: Diagnostic.h:117
void setDisallowFEnvAccess()
Definition: LangOptions.h:348
Do an LV computation for, ultimately, a non-type declaration.
Definition: Decl.h:407
PragmaClangSection PragmaClangRodataSection
Definition: Sema.h:418
bool isIntegerConstantExpr(llvm::APSInt &Result, const ASTContext &Ctx, SourceLocation *Loc=nullptr, bool isEvaluated=true) const
isIntegerConstantExpr - Return true if this expression is a valid integer constant expression...
IdentifierInfo * getName() const
Definition: ParsedAttr.h:381
void AddPragmaAttributes(Scope *S, Decl *D)
Adds the attributes that have been specified using the &#39;#pragma clang attribute push&#39; directives to t...
Definition: SemaAttr.cpp:676
void DiagnoseUnterminatedPragmaAttribute()
Definition: SemaAttr.cpp:712
PragmaMsStackAction
Definition: Sema.h:421
PragmaClangSection PragmaClangDataSection
Definition: Sema.h:417
void ActOnPragmaMSPointersToMembers(LangOptions::PragmaMSPointersToMembersKind Kind, SourceLocation PragmaLoc)
ActOnPragmaMSPointersToMembers - called on well formed #pragma pointers_to_members(representation met...
Definition: SemaAttr.cpp:290
SmallVector< PragmaAttributeGroup, 2 > PragmaAttributeStack
Definition: Sema.h:549
ValueType CurrentValue
Definition: Sema.h:477
T * getAttr() const
Definition: DeclBase.h:529
void setAllowFPContractAcrossStatement()
Definition: LangOptions.h:334
PragmaMSStructKind
Definition: PragmaKinds.h:23
static FixItHint CreateInsertion(SourceLocation InsertionLoc, StringRef Code, bool BeforePreviousInsertions=false)
Create a code modification hint that inserts the given code string at a specific location.
Definition: Diagnostic.h:91
void addDecl(Decl *D)
Add the declaration D into this context.
Definition: DeclBase.cpp:1510
PragmaStack< StringLiteral * > ConstSegStack
Definition: Sema.h:506
PragmaClangSection PragmaClangTextSection
Definition: Sema.h:419
Optional< Visibility > getExplicitVisibility(ExplicitVisibilityKind kind) const
If visibility was explicitly specified for this declaration, return that visibility.
Definition: Decl.cpp:1153
void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr, SourceLocation Loc)
PushNamespaceVisibilityAttr - Note that we&#39;ve entered a namespace with a visibility attribute...
Definition: SemaAttr.cpp:824
TranslationUnitDecl * getTranslationUnitDecl() const
Definition: ASTContext.h:1008
void * VisContext
VisContext - Manages the stack for #pragma GCC visibility.
Definition: Sema.h:530
LangOptions::PragmaMSPointersToMembersKind MSPointerToMemberRepresentationMethod
Controls member pointer representation format under the MS ABI.
Definition: Sema.h:384
llvm::DenseMap< int, SourceRange > ParsedSubjectMatchRuleSet
bool appliesToDecl(const Decl *D, attr::SubjectMatchRule MatchRule) const
Definition: ParsedAttr.cpp:211
void addAttr(Attr *A)
Definition: DeclBase.cpp:842
SourceManager & getSourceManager() const
Definition: Sema.h:1270
void setAllowFEnvAccess()
Definition: LangOptions.h:344
A little helper class (which is basically a smart pointer that forwards info from DiagnosticsEngine) ...
Definition: Diagnostic.h:1315
StringLiteral - This represents a string literal expression, e.g.
Definition: Expr.h:1599
Defines the clang::TargetInfo interface.
FPOptions FPFeatures
Definition: Sema.h:354
void ActOnPragmaVisibility(const IdentifierInfo *VisType, SourceLocation PragmaLoc)
ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... .
Definition: SemaAttr.cpp:783
SourceManager & SourceMgr
Definition: Sema.h:361
virtual bool HandleTopLevelDecl(DeclGroupRef D)
HandleTopLevelDecl - Handle the specified top-level declaration.
Definition: ASTConsumer.cpp:18
PragmaStack< unsigned > PackStack
Definition: Sema.h:495
A trivial tuple used to represent a source range.
ASTContext & Context
Definition: Sema.h:358
This represents a decl that may have a name.
Definition: Decl.h:248
void ActOnPragmaFEnvAccess(LangOptions::FEnvAccessModeKind FPC)
ActOnPragmaFenvAccess - Called on well formed #pragma STDC FENV_ACCESS.
Definition: SemaAttr.cpp:812
SourceLocation CurrentPragmaLocation
Definition: Sema.h:499
void AddMsStructLayoutForRecord(RecordDecl *RD)
AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record.
Definition: SemaAttr.cpp:76
bool isPragmaClangAttribute() const
True if the attribute is specified using &#39;#pragma clang attribute&#39;.
Definition: ParsedAttr.h:444
SourceLocation getBegin() const
SmallVector< Slot, 2 > Stack
Definition: Sema.h:475
Attr - This represents one attribute.
Definition: Attr.h:43
SourceLocation getLocation() const
Definition: DeclBase.h:420
This an attribute introduced by #pragma clang attribute.
Definition: Sema.h:533
void ActOnPragmaOptimize(bool On, SourceLocation PragmaLoc)
Called on well formed #pragma clang optimize.
Definition: SemaAttr.cpp:718
static const unsigned kMac68kAlignmentSentinel
Definition: Sema.h:494
void AddCFAuditedAttribute(Decl *D)
AddCFAuditedAttribute - Check whether we&#39;re currently within &#39;#pragma clang arc_cf_code_audited&#39; and...
Definition: SemaAttr.cpp:455
ValueType DefaultValue
Definition: Sema.h:476
SourceLocation CurInitSegLoc
Definition: Sema.h:527