1 //===--- ASTWriter.cpp - AST File Writer ------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the ASTWriter class, which writes AST files.
12 //===----------------------------------------------------------------------===//
14 #include "clang/Serialization/ASTWriter.h"
15 #include "clang/Serialization/ModuleFileExtension.h"
16 #include "ASTCommon.h"
17 #include "ASTReaderInternals.h"
18 #include "MultiOnDiskHashTable.h"
19 #include "clang/AST/ASTContext.h"
20 #include "clang/AST/Decl.h"
21 #include "clang/AST/DeclContextInternals.h"
22 #include "clang/AST/DeclFriend.h"
23 #include "clang/AST/DeclLookups.h"
24 #include "clang/AST/DeclTemplate.h"
25 #include "clang/AST/Expr.h"
26 #include "clang/AST/ExprCXX.h"
27 #include "clang/AST/Type.h"
28 #include "clang/AST/TypeLocVisitor.h"
29 #include "clang/Basic/DiagnosticOptions.h"
30 #include "clang/Basic/FileManager.h"
31 #include "clang/Basic/FileSystemStatCache.h"
32 #include "clang/Basic/SourceManager.h"
33 #include "clang/Basic/SourceManagerInternals.h"
34 #include "clang/Basic/TargetInfo.h"
35 #include "clang/Basic/TargetOptions.h"
36 #include "clang/Basic/Version.h"
37 #include "clang/Basic/VersionTuple.h"
38 #include "clang/Lex/HeaderSearch.h"
39 #include "clang/Lex/HeaderSearchOptions.h"
40 #include "clang/Lex/MacroInfo.h"
41 #include "clang/Lex/PreprocessingRecord.h"
42 #include "clang/Lex/Preprocessor.h"
43 #include "clang/Lex/PreprocessorOptions.h"
44 #include "clang/Sema/IdentifierResolver.h"
45 #include "clang/Sema/Sema.h"
46 #include "clang/Serialization/ASTReader.h"
47 #include "clang/Serialization/SerializationDiagnostic.h"
48 #include "llvm/ADT/APFloat.h"
49 #include "llvm/ADT/APInt.h"
50 #include "llvm/ADT/Hashing.h"
51 #include "llvm/ADT/StringExtras.h"
52 #include "llvm/Bitcode/BitstreamWriter.h"
53 #include "llvm/Support/EndianStream.h"
54 #include "llvm/Support/FileSystem.h"
55 #include "llvm/Support/MemoryBuffer.h"
56 #include "llvm/Support/OnDiskHashTable.h"
57 #include "llvm/Support/Path.h"
58 #include "llvm/Support/Process.h"
64 using namespace clang;
65 using namespace clang::serialization;
67 template <typename T, typename Allocator>
68 static StringRef bytes(const std::vector<T, Allocator> &v) {
69 if (v.empty()) return StringRef();
70 return StringRef(reinterpret_cast<const char*>(&v[0]),
71 sizeof(T) * v.size());
75 static StringRef bytes(const SmallVectorImpl<T> &v) {
76 return StringRef(reinterpret_cast<const char*>(v.data()),
77 sizeof(T) * v.size());
80 //===----------------------------------------------------------------------===//
82 //===----------------------------------------------------------------------===//
87 ASTWriter::RecordDataImpl &Record;
90 /// \brief Type code that corresponds to the record generated.
92 /// \brief Abbreviation to use for the record, if any.
95 ASTTypeWriter(ASTWriter &Writer, ASTWriter::RecordDataImpl &Record)
96 : Writer(Writer), Record(Record), Code(TYPE_EXT_QUAL) { }
98 void VisitArrayType(const ArrayType *T);
99 void VisitFunctionType(const FunctionType *T);
100 void VisitTagType(const TagType *T);
102 #define TYPE(Class, Base) void Visit##Class##Type(const Class##Type *T);
103 #define ABSTRACT_TYPE(Class, Base)
104 #include "clang/AST/TypeNodes.def"
106 } // end anonymous namespace
108 void ASTTypeWriter::VisitBuiltinType(const BuiltinType *T) {
109 llvm_unreachable("Built-in types are never serialized");
112 void ASTTypeWriter::VisitComplexType(const ComplexType *T) {
113 Writer.AddTypeRef(T->getElementType(), Record);
117 void ASTTypeWriter::VisitPointerType(const PointerType *T) {
118 Writer.AddTypeRef(T->getPointeeType(), Record);
122 void ASTTypeWriter::VisitDecayedType(const DecayedType *T) {
123 Writer.AddTypeRef(T->getOriginalType(), Record);
127 void ASTTypeWriter::VisitAdjustedType(const AdjustedType *T) {
128 Writer.AddTypeRef(T->getOriginalType(), Record);
129 Writer.AddTypeRef(T->getAdjustedType(), Record);
130 Code = TYPE_ADJUSTED;
133 void ASTTypeWriter::VisitBlockPointerType(const BlockPointerType *T) {
134 Writer.AddTypeRef(T->getPointeeType(), Record);
135 Code = TYPE_BLOCK_POINTER;
138 void ASTTypeWriter::VisitLValueReferenceType(const LValueReferenceType *T) {
139 Writer.AddTypeRef(T->getPointeeTypeAsWritten(), Record);
140 Record.push_back(T->isSpelledAsLValue());
141 Code = TYPE_LVALUE_REFERENCE;
144 void ASTTypeWriter::VisitRValueReferenceType(const RValueReferenceType *T) {
145 Writer.AddTypeRef(T->getPointeeTypeAsWritten(), Record);
146 Code = TYPE_RVALUE_REFERENCE;
149 void ASTTypeWriter::VisitMemberPointerType(const MemberPointerType *T) {
150 Writer.AddTypeRef(T->getPointeeType(), Record);
151 Writer.AddTypeRef(QualType(T->getClass(), 0), Record);
152 Code = TYPE_MEMBER_POINTER;
155 void ASTTypeWriter::VisitArrayType(const ArrayType *T) {
156 Writer.AddTypeRef(T->getElementType(), Record);
157 Record.push_back(T->getSizeModifier()); // FIXME: stable values
158 Record.push_back(T->getIndexTypeCVRQualifiers()); // FIXME: stable values
161 void ASTTypeWriter::VisitConstantArrayType(const ConstantArrayType *T) {
163 Writer.AddAPInt(T->getSize(), Record);
164 Code = TYPE_CONSTANT_ARRAY;
167 void ASTTypeWriter::VisitIncompleteArrayType(const IncompleteArrayType *T) {
169 Code = TYPE_INCOMPLETE_ARRAY;
172 void ASTTypeWriter::VisitVariableArrayType(const VariableArrayType *T) {
174 Writer.AddSourceLocation(T->getLBracketLoc(), Record);
175 Writer.AddSourceLocation(T->getRBracketLoc(), Record);
176 Writer.AddStmt(T->getSizeExpr());
177 Code = TYPE_VARIABLE_ARRAY;
180 void ASTTypeWriter::VisitVectorType(const VectorType *T) {
181 Writer.AddTypeRef(T->getElementType(), Record);
182 Record.push_back(T->getNumElements());
183 Record.push_back(T->getVectorKind());
187 void ASTTypeWriter::VisitExtVectorType(const ExtVectorType *T) {
189 Code = TYPE_EXT_VECTOR;
192 void ASTTypeWriter::VisitFunctionType(const FunctionType *T) {
193 Writer.AddTypeRef(T->getReturnType(), Record);
194 FunctionType::ExtInfo C = T->getExtInfo();
195 Record.push_back(C.getNoReturn());
196 Record.push_back(C.getHasRegParm());
197 Record.push_back(C.getRegParm());
198 // FIXME: need to stabilize encoding of calling convention...
199 Record.push_back(C.getCC());
200 Record.push_back(C.getProducesResult());
202 if (C.getHasRegParm() || C.getRegParm() || C.getProducesResult())
206 void ASTTypeWriter::VisitFunctionNoProtoType(const FunctionNoProtoType *T) {
207 VisitFunctionType(T);
208 Code = TYPE_FUNCTION_NO_PROTO;
211 static void addExceptionSpec(ASTWriter &Writer, const FunctionProtoType *T,
212 ASTWriter::RecordDataImpl &Record) {
213 Record.push_back(T->getExceptionSpecType());
214 if (T->getExceptionSpecType() == EST_Dynamic) {
215 Record.push_back(T->getNumExceptions());
216 for (unsigned I = 0, N = T->getNumExceptions(); I != N; ++I)
217 Writer.AddTypeRef(T->getExceptionType(I), Record);
218 } else if (T->getExceptionSpecType() == EST_ComputedNoexcept) {
219 Writer.AddStmt(T->getNoexceptExpr());
220 } else if (T->getExceptionSpecType() == EST_Uninstantiated) {
221 Writer.AddDeclRef(T->getExceptionSpecDecl(), Record);
222 Writer.AddDeclRef(T->getExceptionSpecTemplate(), Record);
223 } else if (T->getExceptionSpecType() == EST_Unevaluated) {
224 Writer.AddDeclRef(T->getExceptionSpecDecl(), Record);
228 void ASTTypeWriter::VisitFunctionProtoType(const FunctionProtoType *T) {
229 VisitFunctionType(T);
231 Record.push_back(T->isVariadic());
232 Record.push_back(T->hasTrailingReturn());
233 Record.push_back(T->getTypeQuals());
234 Record.push_back(static_cast<unsigned>(T->getRefQualifier()));
235 addExceptionSpec(Writer, T, Record);
237 Record.push_back(T->getNumParams());
238 for (unsigned I = 0, N = T->getNumParams(); I != N; ++I)
239 Writer.AddTypeRef(T->getParamType(I), Record);
241 if (T->isVariadic() || T->hasTrailingReturn() || T->getTypeQuals() ||
242 T->getRefQualifier() || T->getExceptionSpecType() != EST_None)
245 Code = TYPE_FUNCTION_PROTO;
248 void ASTTypeWriter::VisitUnresolvedUsingType(const UnresolvedUsingType *T) {
249 Writer.AddDeclRef(T->getDecl(), Record);
250 Code = TYPE_UNRESOLVED_USING;
253 void ASTTypeWriter::VisitTypedefType(const TypedefType *T) {
254 Writer.AddDeclRef(T->getDecl(), Record);
255 assert(!T->isCanonicalUnqualified() && "Invalid typedef ?");
256 Writer.AddTypeRef(T->getCanonicalTypeInternal(), Record);
260 void ASTTypeWriter::VisitTypeOfExprType(const TypeOfExprType *T) {
261 Writer.AddStmt(T->getUnderlyingExpr());
262 Code = TYPE_TYPEOF_EXPR;
265 void ASTTypeWriter::VisitTypeOfType(const TypeOfType *T) {
266 Writer.AddTypeRef(T->getUnderlyingType(), Record);
270 void ASTTypeWriter::VisitDecltypeType(const DecltypeType *T) {
271 Writer.AddTypeRef(T->getUnderlyingType(), Record);
272 Writer.AddStmt(T->getUnderlyingExpr());
273 Code = TYPE_DECLTYPE;
276 void ASTTypeWriter::VisitUnaryTransformType(const UnaryTransformType *T) {
277 Writer.AddTypeRef(T->getBaseType(), Record);
278 Writer.AddTypeRef(T->getUnderlyingType(), Record);
279 Record.push_back(T->getUTTKind());
280 Code = TYPE_UNARY_TRANSFORM;
283 void ASTTypeWriter::VisitAutoType(const AutoType *T) {
284 Writer.AddTypeRef(T->getDeducedType(), Record);
285 Record.push_back((unsigned)T->getKeyword());
286 if (T->getDeducedType().isNull())
287 Record.push_back(T->isDependentType());
291 void ASTTypeWriter::VisitTagType(const TagType *T) {
292 Record.push_back(T->isDependentType());
293 Writer.AddDeclRef(T->getDecl()->getCanonicalDecl(), Record);
294 assert(!T->isBeingDefined() &&
295 "Cannot serialize in the middle of a type definition");
298 void ASTTypeWriter::VisitRecordType(const RecordType *T) {
303 void ASTTypeWriter::VisitEnumType(const EnumType *T) {
308 void ASTTypeWriter::VisitAttributedType(const AttributedType *T) {
309 Writer.AddTypeRef(T->getModifiedType(), Record);
310 Writer.AddTypeRef(T->getEquivalentType(), Record);
311 Record.push_back(T->getAttrKind());
312 Code = TYPE_ATTRIBUTED;
316 ASTTypeWriter::VisitSubstTemplateTypeParmType(
317 const SubstTemplateTypeParmType *T) {
318 Writer.AddTypeRef(QualType(T->getReplacedParameter(), 0), Record);
319 Writer.AddTypeRef(T->getReplacementType(), Record);
320 Code = TYPE_SUBST_TEMPLATE_TYPE_PARM;
324 ASTTypeWriter::VisitSubstTemplateTypeParmPackType(
325 const SubstTemplateTypeParmPackType *T) {
326 Writer.AddTypeRef(QualType(T->getReplacedParameter(), 0), Record);
327 Writer.AddTemplateArgument(T->getArgumentPack(), Record);
328 Code = TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK;
332 ASTTypeWriter::VisitTemplateSpecializationType(
333 const TemplateSpecializationType *T) {
334 Record.push_back(T->isDependentType());
335 Writer.AddTemplateName(T->getTemplateName(), Record);
336 Record.push_back(T->getNumArgs());
337 for (const auto &ArgI : *T)
338 Writer.AddTemplateArgument(ArgI, Record);
339 Writer.AddTypeRef(T->isTypeAlias() ? T->getAliasedType() :
340 T->isCanonicalUnqualified() ? QualType()
341 : T->getCanonicalTypeInternal(),
343 Code = TYPE_TEMPLATE_SPECIALIZATION;
347 ASTTypeWriter::VisitDependentSizedArrayType(const DependentSizedArrayType *T) {
349 Writer.AddStmt(T->getSizeExpr());
350 Writer.AddSourceRange(T->getBracketsRange(), Record);
351 Code = TYPE_DEPENDENT_SIZED_ARRAY;
355 ASTTypeWriter::VisitDependentSizedExtVectorType(
356 const DependentSizedExtVectorType *T) {
357 // FIXME: Serialize this type (C++ only)
358 llvm_unreachable("Cannot serialize dependent sized extended vector types");
362 ASTTypeWriter::VisitTemplateTypeParmType(const TemplateTypeParmType *T) {
363 Record.push_back(T->getDepth());
364 Record.push_back(T->getIndex());
365 Record.push_back(T->isParameterPack());
366 Writer.AddDeclRef(T->getDecl(), Record);
367 Code = TYPE_TEMPLATE_TYPE_PARM;
371 ASTTypeWriter::VisitDependentNameType(const DependentNameType *T) {
372 Record.push_back(T->getKeyword());
373 Writer.AddNestedNameSpecifier(T->getQualifier(), Record);
374 Writer.AddIdentifierRef(T->getIdentifier(), Record);
375 Writer.AddTypeRef(T->isCanonicalUnqualified() ? QualType()
376 : T->getCanonicalTypeInternal(),
378 Code = TYPE_DEPENDENT_NAME;
382 ASTTypeWriter::VisitDependentTemplateSpecializationType(
383 const DependentTemplateSpecializationType *T) {
384 Record.push_back(T->getKeyword());
385 Writer.AddNestedNameSpecifier(T->getQualifier(), Record);
386 Writer.AddIdentifierRef(T->getIdentifier(), Record);
387 Record.push_back(T->getNumArgs());
388 for (const auto &I : *T)
389 Writer.AddTemplateArgument(I, Record);
390 Code = TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION;
393 void ASTTypeWriter::VisitPackExpansionType(const PackExpansionType *T) {
394 Writer.AddTypeRef(T->getPattern(), Record);
395 if (Optional<unsigned> NumExpansions = T->getNumExpansions())
396 Record.push_back(*NumExpansions + 1);
399 Code = TYPE_PACK_EXPANSION;
402 void ASTTypeWriter::VisitParenType(const ParenType *T) {
403 Writer.AddTypeRef(T->getInnerType(), Record);
407 void ASTTypeWriter::VisitElaboratedType(const ElaboratedType *T) {
408 Record.push_back(T->getKeyword());
409 Writer.AddNestedNameSpecifier(T->getQualifier(), Record);
410 Writer.AddTypeRef(T->getNamedType(), Record);
411 Code = TYPE_ELABORATED;
414 void ASTTypeWriter::VisitInjectedClassNameType(const InjectedClassNameType *T) {
415 Writer.AddDeclRef(T->getDecl()->getCanonicalDecl(), Record);
416 Writer.AddTypeRef(T->getInjectedSpecializationType(), Record);
417 Code = TYPE_INJECTED_CLASS_NAME;
420 void ASTTypeWriter::VisitObjCInterfaceType(const ObjCInterfaceType *T) {
421 Writer.AddDeclRef(T->getDecl()->getCanonicalDecl(), Record);
422 Code = TYPE_OBJC_INTERFACE;
425 void ASTTypeWriter::VisitObjCObjectType(const ObjCObjectType *T) {
426 Writer.AddTypeRef(T->getBaseType(), Record);
427 Record.push_back(T->getTypeArgsAsWritten().size());
428 for (auto TypeArg : T->getTypeArgsAsWritten())
429 Writer.AddTypeRef(TypeArg, Record);
430 Record.push_back(T->getNumProtocols());
431 for (const auto *I : T->quals())
432 Writer.AddDeclRef(I, Record);
433 Record.push_back(T->isKindOfTypeAsWritten());
434 Code = TYPE_OBJC_OBJECT;
438 ASTTypeWriter::VisitObjCObjectPointerType(const ObjCObjectPointerType *T) {
439 Writer.AddTypeRef(T->getPointeeType(), Record);
440 Code = TYPE_OBJC_OBJECT_POINTER;
444 ASTTypeWriter::VisitAtomicType(const AtomicType *T) {
445 Writer.AddTypeRef(T->getValueType(), Record);
450 ASTTypeWriter::VisitPipeType(const PipeType *T) {
451 Writer.AddTypeRef(T->getElementType(), Record);
457 class TypeLocWriter : public TypeLocVisitor<TypeLocWriter> {
459 ASTWriter::RecordDataImpl &Record;
462 TypeLocWriter(ASTWriter &Writer, ASTWriter::RecordDataImpl &Record)
463 : Writer(Writer), Record(Record) { }
465 #define ABSTRACT_TYPELOC(CLASS, PARENT)
466 #define TYPELOC(CLASS, PARENT) \
467 void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc);
468 #include "clang/AST/TypeLocNodes.def"
470 void VisitArrayTypeLoc(ArrayTypeLoc TyLoc);
471 void VisitFunctionTypeLoc(FunctionTypeLoc TyLoc);
474 } // end anonymous namespace
476 void TypeLocWriter::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) {
479 void TypeLocWriter::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) {
480 Writer.AddSourceLocation(TL.getBuiltinLoc(), Record);
481 if (TL.needsExtraLocalData()) {
482 Record.push_back(TL.getWrittenTypeSpec());
483 Record.push_back(TL.getWrittenSignSpec());
484 Record.push_back(TL.getWrittenWidthSpec());
485 Record.push_back(TL.hasModeAttr());
488 void TypeLocWriter::VisitComplexTypeLoc(ComplexTypeLoc TL) {
489 Writer.AddSourceLocation(TL.getNameLoc(), Record);
491 void TypeLocWriter::VisitPointerTypeLoc(PointerTypeLoc TL) {
492 Writer.AddSourceLocation(TL.getStarLoc(), Record);
494 void TypeLocWriter::VisitDecayedTypeLoc(DecayedTypeLoc TL) {
497 void TypeLocWriter::VisitAdjustedTypeLoc(AdjustedTypeLoc TL) {
500 void TypeLocWriter::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) {
501 Writer.AddSourceLocation(TL.getCaretLoc(), Record);
503 void TypeLocWriter::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) {
504 Writer.AddSourceLocation(TL.getAmpLoc(), Record);
506 void TypeLocWriter::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) {
507 Writer.AddSourceLocation(TL.getAmpAmpLoc(), Record);
509 void TypeLocWriter::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) {
510 Writer.AddSourceLocation(TL.getStarLoc(), Record);
511 Writer.AddTypeSourceInfo(TL.getClassTInfo(), Record);
513 void TypeLocWriter::VisitArrayTypeLoc(ArrayTypeLoc TL) {
514 Writer.AddSourceLocation(TL.getLBracketLoc(), Record);
515 Writer.AddSourceLocation(TL.getRBracketLoc(), Record);
516 Record.push_back(TL.getSizeExpr() ? 1 : 0);
517 if (TL.getSizeExpr())
518 Writer.AddStmt(TL.getSizeExpr());
520 void TypeLocWriter::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) {
521 VisitArrayTypeLoc(TL);
523 void TypeLocWriter::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) {
524 VisitArrayTypeLoc(TL);
526 void TypeLocWriter::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) {
527 VisitArrayTypeLoc(TL);
529 void TypeLocWriter::VisitDependentSizedArrayTypeLoc(
530 DependentSizedArrayTypeLoc TL) {
531 VisitArrayTypeLoc(TL);
533 void TypeLocWriter::VisitDependentSizedExtVectorTypeLoc(
534 DependentSizedExtVectorTypeLoc TL) {
535 Writer.AddSourceLocation(TL.getNameLoc(), Record);
537 void TypeLocWriter::VisitVectorTypeLoc(VectorTypeLoc TL) {
538 Writer.AddSourceLocation(TL.getNameLoc(), Record);
540 void TypeLocWriter::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) {
541 Writer.AddSourceLocation(TL.getNameLoc(), Record);
543 void TypeLocWriter::VisitFunctionTypeLoc(FunctionTypeLoc TL) {
544 Writer.AddSourceLocation(TL.getLocalRangeBegin(), Record);
545 Writer.AddSourceLocation(TL.getLParenLoc(), Record);
546 Writer.AddSourceLocation(TL.getRParenLoc(), Record);
547 Writer.AddSourceLocation(TL.getLocalRangeEnd(), Record);
548 for (unsigned i = 0, e = TL.getNumParams(); i != e; ++i)
549 Writer.AddDeclRef(TL.getParam(i), Record);
551 void TypeLocWriter::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) {
552 VisitFunctionTypeLoc(TL);
554 void TypeLocWriter::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) {
555 VisitFunctionTypeLoc(TL);
557 void TypeLocWriter::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) {
558 Writer.AddSourceLocation(TL.getNameLoc(), Record);
560 void TypeLocWriter::VisitTypedefTypeLoc(TypedefTypeLoc TL) {
561 Writer.AddSourceLocation(TL.getNameLoc(), Record);
563 void TypeLocWriter::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) {
564 Writer.AddSourceLocation(TL.getTypeofLoc(), Record);
565 Writer.AddSourceLocation(TL.getLParenLoc(), Record);
566 Writer.AddSourceLocation(TL.getRParenLoc(), Record);
568 void TypeLocWriter::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) {
569 Writer.AddSourceLocation(TL.getTypeofLoc(), Record);
570 Writer.AddSourceLocation(TL.getLParenLoc(), Record);
571 Writer.AddSourceLocation(TL.getRParenLoc(), Record);
572 Writer.AddTypeSourceInfo(TL.getUnderlyingTInfo(), Record);
574 void TypeLocWriter::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) {
575 Writer.AddSourceLocation(TL.getNameLoc(), Record);
577 void TypeLocWriter::VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) {
578 Writer.AddSourceLocation(TL.getKWLoc(), Record);
579 Writer.AddSourceLocation(TL.getLParenLoc(), Record);
580 Writer.AddSourceLocation(TL.getRParenLoc(), Record);
581 Writer.AddTypeSourceInfo(TL.getUnderlyingTInfo(), Record);
583 void TypeLocWriter::VisitAutoTypeLoc(AutoTypeLoc TL) {
584 Writer.AddSourceLocation(TL.getNameLoc(), Record);
586 void TypeLocWriter::VisitRecordTypeLoc(RecordTypeLoc TL) {
587 Writer.AddSourceLocation(TL.getNameLoc(), Record);
589 void TypeLocWriter::VisitEnumTypeLoc(EnumTypeLoc TL) {
590 Writer.AddSourceLocation(TL.getNameLoc(), Record);
592 void TypeLocWriter::VisitAttributedTypeLoc(AttributedTypeLoc TL) {
593 Writer.AddSourceLocation(TL.getAttrNameLoc(), Record);
594 if (TL.hasAttrOperand()) {
595 SourceRange range = TL.getAttrOperandParensRange();
596 Writer.AddSourceLocation(range.getBegin(), Record);
597 Writer.AddSourceLocation(range.getEnd(), Record);
599 if (TL.hasAttrExprOperand()) {
600 Expr *operand = TL.getAttrExprOperand();
601 Record.push_back(operand ? 1 : 0);
602 if (operand) Writer.AddStmt(operand);
603 } else if (TL.hasAttrEnumOperand()) {
604 Writer.AddSourceLocation(TL.getAttrEnumOperandLoc(), Record);
607 void TypeLocWriter::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) {
608 Writer.AddSourceLocation(TL.getNameLoc(), Record);
610 void TypeLocWriter::VisitSubstTemplateTypeParmTypeLoc(
611 SubstTemplateTypeParmTypeLoc TL) {
612 Writer.AddSourceLocation(TL.getNameLoc(), Record);
614 void TypeLocWriter::VisitSubstTemplateTypeParmPackTypeLoc(
615 SubstTemplateTypeParmPackTypeLoc TL) {
616 Writer.AddSourceLocation(TL.getNameLoc(), Record);
618 void TypeLocWriter::VisitTemplateSpecializationTypeLoc(
619 TemplateSpecializationTypeLoc TL) {
620 Writer.AddSourceLocation(TL.getTemplateKeywordLoc(), Record);
621 Writer.AddSourceLocation(TL.getTemplateNameLoc(), Record);
622 Writer.AddSourceLocation(TL.getLAngleLoc(), Record);
623 Writer.AddSourceLocation(TL.getRAngleLoc(), Record);
624 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i)
625 Writer.AddTemplateArgumentLocInfo(TL.getArgLoc(i).getArgument().getKind(),
626 TL.getArgLoc(i).getLocInfo(), Record);
628 void TypeLocWriter::VisitParenTypeLoc(ParenTypeLoc TL) {
629 Writer.AddSourceLocation(TL.getLParenLoc(), Record);
630 Writer.AddSourceLocation(TL.getRParenLoc(), Record);
632 void TypeLocWriter::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) {
633 Writer.AddSourceLocation(TL.getElaboratedKeywordLoc(), Record);
634 Writer.AddNestedNameSpecifierLoc(TL.getQualifierLoc(), Record);
636 void TypeLocWriter::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) {
637 Writer.AddSourceLocation(TL.getNameLoc(), Record);
639 void TypeLocWriter::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) {
640 Writer.AddSourceLocation(TL.getElaboratedKeywordLoc(), Record);
641 Writer.AddNestedNameSpecifierLoc(TL.getQualifierLoc(), Record);
642 Writer.AddSourceLocation(TL.getNameLoc(), Record);
644 void TypeLocWriter::VisitDependentTemplateSpecializationTypeLoc(
645 DependentTemplateSpecializationTypeLoc TL) {
646 Writer.AddSourceLocation(TL.getElaboratedKeywordLoc(), Record);
647 Writer.AddNestedNameSpecifierLoc(TL.getQualifierLoc(), Record);
648 Writer.AddSourceLocation(TL.getTemplateKeywordLoc(), Record);
649 Writer.AddSourceLocation(TL.getTemplateNameLoc(), Record);
650 Writer.AddSourceLocation(TL.getLAngleLoc(), Record);
651 Writer.AddSourceLocation(TL.getRAngleLoc(), Record);
652 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I)
653 Writer.AddTemplateArgumentLocInfo(TL.getArgLoc(I).getArgument().getKind(),
654 TL.getArgLoc(I).getLocInfo(), Record);
656 void TypeLocWriter::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) {
657 Writer.AddSourceLocation(TL.getEllipsisLoc(), Record);
659 void TypeLocWriter::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) {
660 Writer.AddSourceLocation(TL.getNameLoc(), Record);
662 void TypeLocWriter::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) {
663 Record.push_back(TL.hasBaseTypeAsWritten());
664 Writer.AddSourceLocation(TL.getTypeArgsLAngleLoc(), Record);
665 Writer.AddSourceLocation(TL.getTypeArgsRAngleLoc(), Record);
666 for (unsigned i = 0, e = TL.getNumTypeArgs(); i != e; ++i)
667 Writer.AddTypeSourceInfo(TL.getTypeArgTInfo(i), Record);
668 Writer.AddSourceLocation(TL.getProtocolLAngleLoc(), Record);
669 Writer.AddSourceLocation(TL.getProtocolRAngleLoc(), Record);
670 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
671 Writer.AddSourceLocation(TL.getProtocolLoc(i), Record);
673 void TypeLocWriter::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) {
674 Writer.AddSourceLocation(TL.getStarLoc(), Record);
676 void TypeLocWriter::VisitAtomicTypeLoc(AtomicTypeLoc TL) {
677 Writer.AddSourceLocation(TL.getKWLoc(), Record);
678 Writer.AddSourceLocation(TL.getLParenLoc(), Record);
679 Writer.AddSourceLocation(TL.getRParenLoc(), Record);
681 void TypeLocWriter::VisitPipeTypeLoc(PipeTypeLoc TL) {
682 Writer.AddSourceLocation(TL.getKWLoc(), Record);
685 void ASTWriter::WriteTypeAbbrevs() {
686 using namespace llvm;
690 // Abbreviation for TYPE_EXT_QUAL
691 Abv = new BitCodeAbbrev();
692 Abv->Add(BitCodeAbbrevOp(serialization::TYPE_EXT_QUAL));
693 Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
694 Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 3)); // Quals
695 TypeExtQualAbbrev = Stream.EmitAbbrev(Abv);
697 // Abbreviation for TYPE_FUNCTION_PROTO
698 Abv = new BitCodeAbbrev();
699 Abv->Add(BitCodeAbbrevOp(serialization::TYPE_FUNCTION_PROTO));
701 Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ReturnType
702 Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // NoReturn
703 Abv->Add(BitCodeAbbrevOp(0)); // HasRegParm
704 Abv->Add(BitCodeAbbrevOp(0)); // RegParm
705 Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // CC
706 Abv->Add(BitCodeAbbrevOp(0)); // ProducesResult
708 Abv->Add(BitCodeAbbrevOp(0)); // IsVariadic
709 Abv->Add(BitCodeAbbrevOp(0)); // HasTrailingReturn
710 Abv->Add(BitCodeAbbrevOp(0)); // TypeQuals
711 Abv->Add(BitCodeAbbrevOp(0)); // RefQualifier
712 Abv->Add(BitCodeAbbrevOp(EST_None)); // ExceptionSpec
713 Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // NumParams
714 Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
715 Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Params
716 TypeFunctionProtoAbbrev = Stream.EmitAbbrev(Abv);
719 //===----------------------------------------------------------------------===//
720 // ASTWriter Implementation
721 //===----------------------------------------------------------------------===//
723 static void EmitBlockID(unsigned ID, const char *Name,
724 llvm::BitstreamWriter &Stream,
725 ASTWriter::RecordDataImpl &Record) {
727 Record.push_back(ID);
728 Stream.EmitRecord(llvm::bitc::BLOCKINFO_CODE_SETBID, Record);
730 // Emit the block name if present.
731 if (!Name || Name[0] == 0)
735 Record.push_back(*Name++);
736 Stream.EmitRecord(llvm::bitc::BLOCKINFO_CODE_BLOCKNAME, Record);
739 static void EmitRecordID(unsigned ID, const char *Name,
740 llvm::BitstreamWriter &Stream,
741 ASTWriter::RecordDataImpl &Record) {
743 Record.push_back(ID);
745 Record.push_back(*Name++);
746 Stream.EmitRecord(llvm::bitc::BLOCKINFO_CODE_SETRECORDNAME, Record);
749 static void AddStmtsExprs(llvm::BitstreamWriter &Stream,
750 ASTWriter::RecordDataImpl &Record) {
751 #define RECORD(X) EmitRecordID(X, #X, Stream, Record)
753 RECORD(STMT_NULL_PTR);
754 RECORD(STMT_REF_PTR);
756 RECORD(STMT_COMPOUND);
758 RECORD(STMT_DEFAULT);
760 RECORD(STMT_ATTRIBUTED);
767 RECORD(STMT_INDIRECT_GOTO);
768 RECORD(STMT_CONTINUE);
774 RECORD(EXPR_PREDEFINED);
775 RECORD(EXPR_DECL_REF);
776 RECORD(EXPR_INTEGER_LITERAL);
777 RECORD(EXPR_FLOATING_LITERAL);
778 RECORD(EXPR_IMAGINARY_LITERAL);
779 RECORD(EXPR_STRING_LITERAL);
780 RECORD(EXPR_CHARACTER_LITERAL);
782 RECORD(EXPR_PAREN_LIST);
783 RECORD(EXPR_UNARY_OPERATOR);
784 RECORD(EXPR_SIZEOF_ALIGN_OF);
785 RECORD(EXPR_ARRAY_SUBSCRIPT);
788 RECORD(EXPR_BINARY_OPERATOR);
789 RECORD(EXPR_COMPOUND_ASSIGN_OPERATOR);
790 RECORD(EXPR_CONDITIONAL_OPERATOR);
791 RECORD(EXPR_IMPLICIT_CAST);
792 RECORD(EXPR_CSTYLE_CAST);
793 RECORD(EXPR_COMPOUND_LITERAL);
794 RECORD(EXPR_EXT_VECTOR_ELEMENT);
795 RECORD(EXPR_INIT_LIST);
796 RECORD(EXPR_DESIGNATED_INIT);
797 RECORD(EXPR_DESIGNATED_INIT_UPDATE);
798 RECORD(EXPR_IMPLICIT_VALUE_INIT);
799 RECORD(EXPR_NO_INIT);
801 RECORD(EXPR_ADDR_LABEL);
804 RECORD(EXPR_GNU_NULL);
805 RECORD(EXPR_SHUFFLE_VECTOR);
807 RECORD(EXPR_GENERIC_SELECTION);
808 RECORD(EXPR_OBJC_STRING_LITERAL);
809 RECORD(EXPR_OBJC_BOXED_EXPRESSION);
810 RECORD(EXPR_OBJC_ARRAY_LITERAL);
811 RECORD(EXPR_OBJC_DICTIONARY_LITERAL);
812 RECORD(EXPR_OBJC_ENCODE);
813 RECORD(EXPR_OBJC_SELECTOR_EXPR);
814 RECORD(EXPR_OBJC_PROTOCOL_EXPR);
815 RECORD(EXPR_OBJC_IVAR_REF_EXPR);
816 RECORD(EXPR_OBJC_PROPERTY_REF_EXPR);
817 RECORD(EXPR_OBJC_KVC_REF_EXPR);
818 RECORD(EXPR_OBJC_MESSAGE_EXPR);
819 RECORD(STMT_OBJC_FOR_COLLECTION);
820 RECORD(STMT_OBJC_CATCH);
821 RECORD(STMT_OBJC_FINALLY);
822 RECORD(STMT_OBJC_AT_TRY);
823 RECORD(STMT_OBJC_AT_SYNCHRONIZED);
824 RECORD(STMT_OBJC_AT_THROW);
825 RECORD(EXPR_OBJC_BOOL_LITERAL);
826 RECORD(STMT_CXX_CATCH);
827 RECORD(STMT_CXX_TRY);
828 RECORD(STMT_CXX_FOR_RANGE);
829 RECORD(EXPR_CXX_OPERATOR_CALL);
830 RECORD(EXPR_CXX_MEMBER_CALL);
831 RECORD(EXPR_CXX_CONSTRUCT);
832 RECORD(EXPR_CXX_TEMPORARY_OBJECT);
833 RECORD(EXPR_CXX_STATIC_CAST);
834 RECORD(EXPR_CXX_DYNAMIC_CAST);
835 RECORD(EXPR_CXX_REINTERPRET_CAST);
836 RECORD(EXPR_CXX_CONST_CAST);
837 RECORD(EXPR_CXX_FUNCTIONAL_CAST);
838 RECORD(EXPR_USER_DEFINED_LITERAL);
839 RECORD(EXPR_CXX_STD_INITIALIZER_LIST);
840 RECORD(EXPR_CXX_BOOL_LITERAL);
841 RECORD(EXPR_CXX_NULL_PTR_LITERAL);
842 RECORD(EXPR_CXX_TYPEID_EXPR);
843 RECORD(EXPR_CXX_TYPEID_TYPE);
844 RECORD(EXPR_CXX_THIS);
845 RECORD(EXPR_CXX_THROW);
846 RECORD(EXPR_CXX_DEFAULT_ARG);
847 RECORD(EXPR_CXX_DEFAULT_INIT);
848 RECORD(EXPR_CXX_BIND_TEMPORARY);
849 RECORD(EXPR_CXX_SCALAR_VALUE_INIT);
850 RECORD(EXPR_CXX_NEW);
851 RECORD(EXPR_CXX_DELETE);
852 RECORD(EXPR_CXX_PSEUDO_DESTRUCTOR);
853 RECORD(EXPR_EXPR_WITH_CLEANUPS);
854 RECORD(EXPR_CXX_DEPENDENT_SCOPE_MEMBER);
855 RECORD(EXPR_CXX_DEPENDENT_SCOPE_DECL_REF);
856 RECORD(EXPR_CXX_UNRESOLVED_CONSTRUCT);
857 RECORD(EXPR_CXX_UNRESOLVED_MEMBER);
858 RECORD(EXPR_CXX_UNRESOLVED_LOOKUP);
859 RECORD(EXPR_CXX_EXPRESSION_TRAIT);
860 RECORD(EXPR_CXX_NOEXCEPT);
861 RECORD(EXPR_OPAQUE_VALUE);
862 RECORD(EXPR_BINARY_CONDITIONAL_OPERATOR);
863 RECORD(EXPR_TYPE_TRAIT);
864 RECORD(EXPR_ARRAY_TYPE_TRAIT);
865 RECORD(EXPR_PACK_EXPANSION);
866 RECORD(EXPR_SIZEOF_PACK);
867 RECORD(EXPR_SUBST_NON_TYPE_TEMPLATE_PARM);
868 RECORD(EXPR_SUBST_NON_TYPE_TEMPLATE_PARM_PACK);
869 RECORD(EXPR_FUNCTION_PARM_PACK);
870 RECORD(EXPR_MATERIALIZE_TEMPORARY);
871 RECORD(EXPR_CUDA_KERNEL_CALL);
872 RECORD(EXPR_CXX_UUIDOF_EXPR);
873 RECORD(EXPR_CXX_UUIDOF_TYPE);
878 void ASTWriter::WriteBlockInfoBlock() {
880 Stream.EnterSubblock(llvm::bitc::BLOCKINFO_BLOCK_ID, 3);
882 #define BLOCK(X) EmitBlockID(X ## _ID, #X, Stream, Record)
883 #define RECORD(X) EmitRecordID(X, #X, Stream, Record)
886 BLOCK(CONTROL_BLOCK);
890 RECORD(MODULE_DIRECTORY);
891 RECORD(MODULE_MAP_FILE);
893 RECORD(ORIGINAL_FILE);
894 RECORD(ORIGINAL_PCH_DIR);
895 RECORD(ORIGINAL_FILE_ID);
896 RECORD(INPUT_FILE_OFFSETS);
898 BLOCK(OPTIONS_BLOCK);
899 RECORD(LANGUAGE_OPTIONS);
900 RECORD(TARGET_OPTIONS);
901 RECORD(DIAGNOSTIC_OPTIONS);
902 RECORD(FILE_SYSTEM_OPTIONS);
903 RECORD(HEADER_SEARCH_OPTIONS);
904 RECORD(PREPROCESSOR_OPTIONS);
906 BLOCK(INPUT_FILES_BLOCK);
909 // AST Top-Level Block.
913 RECORD(IDENTIFIER_OFFSET);
914 RECORD(IDENTIFIER_TABLE);
915 RECORD(EAGERLY_DESERIALIZED_DECLS);
916 RECORD(SPECIAL_TYPES);
918 RECORD(TENTATIVE_DEFINITIONS);
919 RECORD(SELECTOR_OFFSETS);
921 RECORD(PP_COUNTER_VALUE);
922 RECORD(SOURCE_LOCATION_OFFSETS);
923 RECORD(SOURCE_LOCATION_PRELOADS);
924 RECORD(EXT_VECTOR_DECLS);
925 RECORD(UNUSED_FILESCOPED_DECLS);
926 RECORD(PPD_ENTITIES_OFFSETS);
928 RECORD(REFERENCED_SELECTOR_POOL);
929 RECORD(TU_UPDATE_LEXICAL);
930 RECORD(SEMA_DECL_REFS);
931 RECORD(WEAK_UNDECLARED_IDENTIFIERS);
932 RECORD(PENDING_IMPLICIT_INSTANTIATIONS);
933 RECORD(DECL_REPLACEMENTS);
934 RECORD(UPDATE_VISIBLE);
935 RECORD(DECL_UPDATE_OFFSETS);
936 RECORD(DECL_UPDATES);
937 RECORD(CXX_BASE_SPECIFIER_OFFSETS);
938 RECORD(DIAG_PRAGMA_MAPPINGS);
939 RECORD(CUDA_SPECIAL_DECL_REFS);
940 RECORD(HEADER_SEARCH_TABLE);
941 RECORD(FP_PRAGMA_OPTIONS);
942 RECORD(OPENCL_EXTENSIONS);
943 RECORD(DELEGATING_CTORS);
944 RECORD(KNOWN_NAMESPACES);
945 RECORD(MODULE_OFFSET_MAP);
946 RECORD(SOURCE_MANAGER_LINE_TABLE);
947 RECORD(OBJC_CATEGORIES_MAP);
948 RECORD(FILE_SORTED_DECLS);
949 RECORD(IMPORTED_MODULES);
950 RECORD(OBJC_CATEGORIES);
951 RECORD(MACRO_OFFSET);
952 RECORD(INTERESTING_IDENTIFIERS);
953 RECORD(UNDEFINED_BUT_USED);
954 RECORD(LATE_PARSED_TEMPLATE);
955 RECORD(OPTIMIZE_PRAGMA_OPTIONS);
956 RECORD(UNUSED_LOCAL_TYPEDEF_NAME_CANDIDATES);
957 RECORD(CXX_CTOR_INITIALIZERS_OFFSETS);
958 RECORD(DELETE_EXPRS_TO_ANALYZE);
960 // SourceManager Block.
961 BLOCK(SOURCE_MANAGER_BLOCK);
962 RECORD(SM_SLOC_FILE_ENTRY);
963 RECORD(SM_SLOC_BUFFER_ENTRY);
964 RECORD(SM_SLOC_BUFFER_BLOB);
965 RECORD(SM_SLOC_EXPANSION_ENTRY);
967 // Preprocessor Block.
968 BLOCK(PREPROCESSOR_BLOCK);
969 RECORD(PP_MACRO_DIRECTIVE_HISTORY);
970 RECORD(PP_MACRO_FUNCTION_LIKE);
971 RECORD(PP_MACRO_OBJECT_LIKE);
972 RECORD(PP_MODULE_MACRO);
976 BLOCK(SUBMODULE_BLOCK);
977 RECORD(SUBMODULE_METADATA);
978 RECORD(SUBMODULE_DEFINITION);
979 RECORD(SUBMODULE_UMBRELLA_HEADER);
980 RECORD(SUBMODULE_HEADER);
981 RECORD(SUBMODULE_TOPHEADER);
982 RECORD(SUBMODULE_UMBRELLA_DIR);
983 RECORD(SUBMODULE_IMPORTS);
984 RECORD(SUBMODULE_EXPORTS);
985 RECORD(SUBMODULE_REQUIRES);
986 RECORD(SUBMODULE_EXCLUDED_HEADER);
987 RECORD(SUBMODULE_LINK_LIBRARY);
988 RECORD(SUBMODULE_CONFIG_MACRO);
989 RECORD(SUBMODULE_CONFLICT);
990 RECORD(SUBMODULE_PRIVATE_HEADER);
991 RECORD(SUBMODULE_TEXTUAL_HEADER);
992 RECORD(SUBMODULE_PRIVATE_TEXTUAL_HEADER);
995 BLOCK(COMMENTS_BLOCK);
996 RECORD(COMMENTS_RAW_COMMENT);
998 // Decls and Types block.
999 BLOCK(DECLTYPES_BLOCK);
1000 RECORD(TYPE_EXT_QUAL);
1001 RECORD(TYPE_COMPLEX);
1002 RECORD(TYPE_POINTER);
1003 RECORD(TYPE_BLOCK_POINTER);
1004 RECORD(TYPE_LVALUE_REFERENCE);
1005 RECORD(TYPE_RVALUE_REFERENCE);
1006 RECORD(TYPE_MEMBER_POINTER);
1007 RECORD(TYPE_CONSTANT_ARRAY);
1008 RECORD(TYPE_INCOMPLETE_ARRAY);
1009 RECORD(TYPE_VARIABLE_ARRAY);
1010 RECORD(TYPE_VECTOR);
1011 RECORD(TYPE_EXT_VECTOR);
1012 RECORD(TYPE_FUNCTION_NO_PROTO);
1013 RECORD(TYPE_FUNCTION_PROTO);
1014 RECORD(TYPE_TYPEDEF);
1015 RECORD(TYPE_TYPEOF_EXPR);
1016 RECORD(TYPE_TYPEOF);
1017 RECORD(TYPE_RECORD);
1019 RECORD(TYPE_OBJC_INTERFACE);
1020 RECORD(TYPE_OBJC_OBJECT_POINTER);
1021 RECORD(TYPE_DECLTYPE);
1022 RECORD(TYPE_ELABORATED);
1023 RECORD(TYPE_SUBST_TEMPLATE_TYPE_PARM);
1024 RECORD(TYPE_UNRESOLVED_USING);
1025 RECORD(TYPE_INJECTED_CLASS_NAME);
1026 RECORD(TYPE_OBJC_OBJECT);
1027 RECORD(TYPE_TEMPLATE_TYPE_PARM);
1028 RECORD(TYPE_TEMPLATE_SPECIALIZATION);
1029 RECORD(TYPE_DEPENDENT_NAME);
1030 RECORD(TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION);
1031 RECORD(TYPE_DEPENDENT_SIZED_ARRAY);
1033 RECORD(TYPE_PACK_EXPANSION);
1034 RECORD(TYPE_ATTRIBUTED);
1035 RECORD(TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK);
1037 RECORD(TYPE_UNARY_TRANSFORM);
1038 RECORD(TYPE_ATOMIC);
1039 RECORD(TYPE_DECAYED);
1040 RECORD(TYPE_ADJUSTED);
1041 RECORD(LOCAL_REDECLARATIONS);
1042 RECORD(DECL_TYPEDEF);
1043 RECORD(DECL_TYPEALIAS);
1045 RECORD(DECL_RECORD);
1046 RECORD(DECL_ENUM_CONSTANT);
1047 RECORD(DECL_FUNCTION);
1048 RECORD(DECL_OBJC_METHOD);
1049 RECORD(DECL_OBJC_INTERFACE);
1050 RECORD(DECL_OBJC_PROTOCOL);
1051 RECORD(DECL_OBJC_IVAR);
1052 RECORD(DECL_OBJC_AT_DEFS_FIELD);
1053 RECORD(DECL_OBJC_CATEGORY);
1054 RECORD(DECL_OBJC_CATEGORY_IMPL);
1055 RECORD(DECL_OBJC_IMPLEMENTATION);
1056 RECORD(DECL_OBJC_COMPATIBLE_ALIAS);
1057 RECORD(DECL_OBJC_PROPERTY);
1058 RECORD(DECL_OBJC_PROPERTY_IMPL);
1060 RECORD(DECL_MS_PROPERTY);
1062 RECORD(DECL_IMPLICIT_PARAM);
1063 RECORD(DECL_PARM_VAR);
1064 RECORD(DECL_FILE_SCOPE_ASM);
1066 RECORD(DECL_CONTEXT_LEXICAL);
1067 RECORD(DECL_CONTEXT_VISIBLE);
1068 RECORD(DECL_NAMESPACE);
1069 RECORD(DECL_NAMESPACE_ALIAS);
1071 RECORD(DECL_USING_SHADOW);
1072 RECORD(DECL_USING_DIRECTIVE);
1073 RECORD(DECL_UNRESOLVED_USING_VALUE);
1074 RECORD(DECL_UNRESOLVED_USING_TYPENAME);
1075 RECORD(DECL_LINKAGE_SPEC);
1076 RECORD(DECL_CXX_RECORD);
1077 RECORD(DECL_CXX_METHOD);
1078 RECORD(DECL_CXX_CONSTRUCTOR);
1079 RECORD(DECL_CXX_DESTRUCTOR);
1080 RECORD(DECL_CXX_CONVERSION);
1081 RECORD(DECL_ACCESS_SPEC);
1082 RECORD(DECL_FRIEND);
1083 RECORD(DECL_FRIEND_TEMPLATE);
1084 RECORD(DECL_CLASS_TEMPLATE);
1085 RECORD(DECL_CLASS_TEMPLATE_SPECIALIZATION);
1086 RECORD(DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION);
1087 RECORD(DECL_VAR_TEMPLATE);
1088 RECORD(DECL_VAR_TEMPLATE_SPECIALIZATION);
1089 RECORD(DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION);
1090 RECORD(DECL_FUNCTION_TEMPLATE);
1091 RECORD(DECL_TEMPLATE_TYPE_PARM);
1092 RECORD(DECL_NON_TYPE_TEMPLATE_PARM);
1093 RECORD(DECL_TEMPLATE_TEMPLATE_PARM);
1094 RECORD(DECL_STATIC_ASSERT);
1095 RECORD(DECL_CXX_BASE_SPECIFIERS);
1096 RECORD(DECL_INDIRECTFIELD);
1097 RECORD(DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK);
1099 // Statements and Exprs can occur in the Decls and Types block.
1100 AddStmtsExprs(Stream, Record);
1102 BLOCK(PREPROCESSOR_DETAIL_BLOCK);
1103 RECORD(PPD_MACRO_EXPANSION);
1104 RECORD(PPD_MACRO_DEFINITION);
1105 RECORD(PPD_INCLUSION_DIRECTIVE);
1107 // Decls and Types block.
1108 BLOCK(EXTENSION_BLOCK);
1109 RECORD(EXTENSION_METADATA);
1116 /// \brief Prepares a path for being written to an AST file by converting it
1117 /// to an absolute path and removing nested './'s.
1119 /// \return \c true if the path was changed.
1120 static bool cleanPathForOutput(FileManager &FileMgr,
1121 SmallVectorImpl<char> &Path) {
1122 bool Changed = FileMgr.makeAbsolutePath(Path);
1123 return Changed | llvm::sys::path::remove_dots(Path);
1126 /// \brief Adjusts the given filename to only write out the portion of the
1127 /// filename that is not part of the system root directory.
1129 /// \param Filename the file name to adjust.
1131 /// \param BaseDir When non-NULL, the PCH file is a relocatable AST file and
1132 /// the returned filename will be adjusted by this root directory.
1134 /// \returns either the original filename (if it needs no adjustment) or the
1135 /// adjusted filename (which points into the @p Filename parameter).
1137 adjustFilenameForRelocatableAST(const char *Filename, StringRef BaseDir) {
1138 assert(Filename && "No file name to adjust?");
1140 if (BaseDir.empty())
1143 // Verify that the filename and the system root have the same prefix.
1145 for (; Filename[Pos] && Pos < BaseDir.size(); ++Pos)
1146 if (Filename[Pos] != BaseDir[Pos])
1147 return Filename; // Prefixes don't match.
1149 // We hit the end of the filename before we hit the end of the system root.
1153 // If there's not a path separator at the end of the base directory nor
1154 // immediately after it, then this isn't within the base directory.
1155 if (!llvm::sys::path::is_separator(Filename[Pos])) {
1156 if (!llvm::sys::path::is_separator(BaseDir.back()))
1159 // If the file name has a '/' at the current position, skip over the '/'.
1160 // We distinguish relative paths from absolute paths by the
1161 // absence of '/' at the beginning of relative paths.
1163 // FIXME: This is wrong. We distinguish them by asking if the path is
1164 // absolute, which isn't the same thing. And there might be multiple '/'s
1165 // in a row. Use a better mechanism to indicate whether we have emitted an
1166 // absolute or relative path.
1170 return Filename + Pos;
1173 static ASTFileSignature getSignature() {
1175 if (ASTFileSignature S = llvm::sys::Process::GetRandomNumber())
1177 // Rely on GetRandomNumber to eventually return non-zero...
1181 /// \brief Write the control block.
1182 uint64_t ASTWriter::WriteControlBlock(Preprocessor &PP,
1183 ASTContext &Context,
1185 const std::string &OutputFile) {
1186 ASTFileSignature Signature = 0;
1188 using namespace llvm;
1189 Stream.EnterSubblock(CONTROL_BLOCK_ID, 5);
1193 auto *MetadataAbbrev = new BitCodeAbbrev();
1194 MetadataAbbrev->Add(BitCodeAbbrevOp(METADATA));
1195 MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Major
1196 MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Minor
1197 MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Clang maj.
1198 MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Clang min.
1199 MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Relocatable
1200 MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Timestamps
1201 MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Errors
1202 MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // SVN branch/tag
1203 unsigned MetadataAbbrevCode = Stream.EmitAbbrev(MetadataAbbrev);
1204 assert((!WritingModule || isysroot.empty()) &&
1205 "writing module as a relocatable PCH?");
1207 RecordData::value_type Record[] = {METADATA, VERSION_MAJOR, VERSION_MINOR,
1208 CLANG_VERSION_MAJOR, CLANG_VERSION_MINOR,
1209 !isysroot.empty(), IncludeTimestamps,
1210 ASTHasCompilerErrors};
1211 Stream.EmitRecordWithBlob(MetadataAbbrevCode, Record,
1212 getClangFullRepositoryVersion());
1214 if (WritingModule) {
1215 // For implicit modules we output a signature that we can use to ensure
1216 // duplicate module builds don't collide in the cache as their output order
1217 // is non-deterministic.
1218 // FIXME: Remove this when output is deterministic.
1219 if (Context.getLangOpts().ImplicitModules) {
1220 Signature = getSignature();
1221 RecordData::value_type Record[] = {Signature};
1222 Stream.EmitRecord(SIGNATURE, Record);
1226 auto *Abbrev = new BitCodeAbbrev();
1227 Abbrev->Add(BitCodeAbbrevOp(MODULE_NAME));
1228 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
1229 unsigned AbbrevCode = Stream.EmitAbbrev(Abbrev);
1230 RecordData::value_type Record[] = {MODULE_NAME};
1231 Stream.EmitRecordWithBlob(AbbrevCode, Record, WritingModule->Name);
1234 if (WritingModule && WritingModule->Directory) {
1235 SmallString<128> BaseDir(WritingModule->Directory->getName());
1236 cleanPathForOutput(Context.getSourceManager().getFileManager(), BaseDir);
1238 // If the home of the module is the current working directory, then we
1239 // want to pick up the cwd of the build process loading the module, not
1240 // our cwd, when we load this module.
1241 if (!PP.getHeaderSearchInfo()
1242 .getHeaderSearchOpts()
1243 .ModuleMapFileHomeIsCwd ||
1244 WritingModule->Directory->getName() != StringRef(".")) {
1245 // Module directory.
1246 auto *Abbrev = new BitCodeAbbrev();
1247 Abbrev->Add(BitCodeAbbrevOp(MODULE_DIRECTORY));
1248 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Directory
1249 unsigned AbbrevCode = Stream.EmitAbbrev(Abbrev);
1251 RecordData::value_type Record[] = {MODULE_DIRECTORY};
1252 Stream.EmitRecordWithBlob(AbbrevCode, Record, BaseDir);
1255 // Write out all other paths relative to the base directory if possible.
1256 BaseDirectory.assign(BaseDir.begin(), BaseDir.end());
1257 } else if (!isysroot.empty()) {
1258 // Write out paths relative to the sysroot if possible.
1259 BaseDirectory = isysroot;
1263 if (WritingModule) {
1266 auto &Map = PP.getHeaderSearchInfo().getModuleMap();
1268 // Primary module map file.
1269 AddPath(Map.getModuleMapFileForUniquing(WritingModule)->getName(), Record);
1271 // Additional module map files.
1272 if (auto *AdditionalModMaps =
1273 Map.getAdditionalModuleMapFiles(WritingModule)) {
1274 Record.push_back(AdditionalModMaps->size());
1275 for (const FileEntry *F : *AdditionalModMaps)
1276 AddPath(F->getName(), Record);
1278 Record.push_back(0);
1281 Stream.EmitRecord(MODULE_MAP_FILE, Record);
1286 serialization::ModuleManager &Mgr = Chain->getModuleManager();
1289 for (auto *M : Mgr) {
1290 // Skip modules that weren't directly imported.
1291 if (!M->isDirectlyImported())
1294 Record.push_back((unsigned)M->Kind); // FIXME: Stable encoding
1295 AddSourceLocation(M->ImportLoc, Record);
1296 Record.push_back(M->File->getSize());
1297 Record.push_back(getTimestampForOutput(M->File));
1298 Record.push_back(M->Signature);
1299 AddPath(M->FileName, Record);
1301 Stream.EmitRecord(IMPORTS, Record);
1304 // Write the options block.
1305 Stream.EnterSubblock(OPTIONS_BLOCK_ID, 4);
1307 // Language options.
1309 const LangOptions &LangOpts = Context.getLangOpts();
1310 #define LANGOPT(Name, Bits, Default, Description) \
1311 Record.push_back(LangOpts.Name);
1312 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1313 Record.push_back(static_cast<unsigned>(LangOpts.get##Name()));
1314 #include "clang/Basic/LangOptions.def"
1315 #define SANITIZER(NAME, ID) \
1316 Record.push_back(LangOpts.Sanitize.has(SanitizerKind::ID));
1317 #include "clang/Basic/Sanitizers.def"
1319 Record.push_back(LangOpts.ModuleFeatures.size());
1320 for (StringRef Feature : LangOpts.ModuleFeatures)
1321 AddString(Feature, Record);
1323 Record.push_back((unsigned) LangOpts.ObjCRuntime.getKind());
1324 AddVersionTuple(LangOpts.ObjCRuntime.getVersion(), Record);
1326 AddString(LangOpts.CurrentModule, Record);
1329 Record.push_back(LangOpts.CommentOpts.BlockCommandNames.size());
1330 for (const auto &I : LangOpts.CommentOpts.BlockCommandNames) {
1331 AddString(I, Record);
1333 Record.push_back(LangOpts.CommentOpts.ParseAllComments);
1335 // OpenMP offloading options.
1336 Record.push_back(LangOpts.OMPTargetTriples.size());
1337 for (auto &T : LangOpts.OMPTargetTriples)
1338 AddString(T.getTriple(), Record);
1340 AddString(LangOpts.OMPHostIRFile, Record);
1342 Stream.EmitRecord(LANGUAGE_OPTIONS, Record);
1346 const TargetInfo &Target = Context.getTargetInfo();
1347 const TargetOptions &TargetOpts = Target.getTargetOpts();
1348 AddString(TargetOpts.Triple, Record);
1349 AddString(TargetOpts.CPU, Record);
1350 AddString(TargetOpts.ABI, Record);
1351 Record.push_back(TargetOpts.FeaturesAsWritten.size());
1352 for (unsigned I = 0, N = TargetOpts.FeaturesAsWritten.size(); I != N; ++I) {
1353 AddString(TargetOpts.FeaturesAsWritten[I], Record);
1355 Record.push_back(TargetOpts.Features.size());
1356 for (unsigned I = 0, N = TargetOpts.Features.size(); I != N; ++I) {
1357 AddString(TargetOpts.Features[I], Record);
1359 Stream.EmitRecord(TARGET_OPTIONS, Record);
1361 // Diagnostic options.
1363 const DiagnosticOptions &DiagOpts
1364 = Context.getDiagnostics().getDiagnosticOptions();
1365 #define DIAGOPT(Name, Bits, Default) Record.push_back(DiagOpts.Name);
1366 #define ENUM_DIAGOPT(Name, Type, Bits, Default) \
1367 Record.push_back(static_cast<unsigned>(DiagOpts.get##Name()));
1368 #include "clang/Basic/DiagnosticOptions.def"
1369 Record.push_back(DiagOpts.Warnings.size());
1370 for (unsigned I = 0, N = DiagOpts.Warnings.size(); I != N; ++I)
1371 AddString(DiagOpts.Warnings[I], Record);
1372 Record.push_back(DiagOpts.Remarks.size());
1373 for (unsigned I = 0, N = DiagOpts.Remarks.size(); I != N; ++I)
1374 AddString(DiagOpts.Remarks[I], Record);
1375 // Note: we don't serialize the log or serialization file names, because they
1376 // are generally transient files and will almost always be overridden.
1377 Stream.EmitRecord(DIAGNOSTIC_OPTIONS, Record);
1379 // File system options.
1381 const FileSystemOptions &FSOpts =
1382 Context.getSourceManager().getFileManager().getFileSystemOpts();
1383 AddString(FSOpts.WorkingDir, Record);
1384 Stream.EmitRecord(FILE_SYSTEM_OPTIONS, Record);
1386 // Header search options.
1388 const HeaderSearchOptions &HSOpts
1389 = PP.getHeaderSearchInfo().getHeaderSearchOpts();
1390 AddString(HSOpts.Sysroot, Record);
1393 Record.push_back(HSOpts.UserEntries.size());
1394 for (unsigned I = 0, N = HSOpts.UserEntries.size(); I != N; ++I) {
1395 const HeaderSearchOptions::Entry &Entry = HSOpts.UserEntries[I];
1396 AddString(Entry.Path, Record);
1397 Record.push_back(static_cast<unsigned>(Entry.Group));
1398 Record.push_back(Entry.IsFramework);
1399 Record.push_back(Entry.IgnoreSysRoot);
1402 // System header prefixes.
1403 Record.push_back(HSOpts.SystemHeaderPrefixes.size());
1404 for (unsigned I = 0, N = HSOpts.SystemHeaderPrefixes.size(); I != N; ++I) {
1405 AddString(HSOpts.SystemHeaderPrefixes[I].Prefix, Record);
1406 Record.push_back(HSOpts.SystemHeaderPrefixes[I].IsSystemHeader);
1409 AddString(HSOpts.ResourceDir, Record);
1410 AddString(HSOpts.ModuleCachePath, Record);
1411 AddString(HSOpts.ModuleUserBuildPath, Record);
1412 Record.push_back(HSOpts.DisableModuleHash);
1413 Record.push_back(HSOpts.UseBuiltinIncludes);
1414 Record.push_back(HSOpts.UseStandardSystemIncludes);
1415 Record.push_back(HSOpts.UseStandardCXXIncludes);
1416 Record.push_back(HSOpts.UseLibcxx);
1417 // Write out the specific module cache path that contains the module files.
1418 AddString(PP.getHeaderSearchInfo().getModuleCachePath(), Record);
1419 Stream.EmitRecord(HEADER_SEARCH_OPTIONS, Record);
1421 // Preprocessor options.
1423 const PreprocessorOptions &PPOpts = PP.getPreprocessorOpts();
1425 // Macro definitions.
1426 Record.push_back(PPOpts.Macros.size());
1427 for (unsigned I = 0, N = PPOpts.Macros.size(); I != N; ++I) {
1428 AddString(PPOpts.Macros[I].first, Record);
1429 Record.push_back(PPOpts.Macros[I].second);
1433 Record.push_back(PPOpts.Includes.size());
1434 for (unsigned I = 0, N = PPOpts.Includes.size(); I != N; ++I)
1435 AddString(PPOpts.Includes[I], Record);
1438 Record.push_back(PPOpts.MacroIncludes.size());
1439 for (unsigned I = 0, N = PPOpts.MacroIncludes.size(); I != N; ++I)
1440 AddString(PPOpts.MacroIncludes[I], Record);
1442 Record.push_back(PPOpts.UsePredefines);
1443 // Detailed record is important since it is used for the module cache hash.
1444 Record.push_back(PPOpts.DetailedRecord);
1445 AddString(PPOpts.ImplicitPCHInclude, Record);
1446 AddString(PPOpts.ImplicitPTHInclude, Record);
1447 Record.push_back(static_cast<unsigned>(PPOpts.ObjCXXARCStandardLibrary));
1448 Stream.EmitRecord(PREPROCESSOR_OPTIONS, Record);
1450 // Leave the options block.
1453 // Original file name and file ID
1454 SourceManager &SM = Context.getSourceManager();
1455 if (const FileEntry *MainFile = SM.getFileEntryForID(SM.getMainFileID())) {
1456 auto *FileAbbrev = new BitCodeAbbrev();
1457 FileAbbrev->Add(BitCodeAbbrevOp(ORIGINAL_FILE));
1458 FileAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // File ID
1459 FileAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // File name
1460 unsigned FileAbbrevCode = Stream.EmitAbbrev(FileAbbrev);
1463 Record.push_back(ORIGINAL_FILE);
1464 Record.push_back(SM.getMainFileID().getOpaqueValue());
1465 EmitRecordWithPath(FileAbbrevCode, Record, MainFile->getName());
1469 Record.push_back(SM.getMainFileID().getOpaqueValue());
1470 Stream.EmitRecord(ORIGINAL_FILE_ID, Record);
1472 // Original PCH directory
1473 if (!OutputFile.empty() && OutputFile != "-") {
1474 auto *Abbrev = new BitCodeAbbrev();
1475 Abbrev->Add(BitCodeAbbrevOp(ORIGINAL_PCH_DIR));
1476 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // File name
1477 unsigned AbbrevCode = Stream.EmitAbbrev(Abbrev);
1479 SmallString<128> OutputPath(OutputFile);
1481 SM.getFileManager().makeAbsolutePath(OutputPath);
1482 StringRef origDir = llvm::sys::path::parent_path(OutputPath);
1484 RecordData::value_type Record[] = {ORIGINAL_PCH_DIR};
1485 Stream.EmitRecordWithBlob(AbbrevCode, Record, origDir);
1488 WriteInputFiles(Context.SourceMgr,
1489 PP.getHeaderSearchInfo().getHeaderSearchOpts(),
1490 PP.getLangOpts().Modules);
1496 /// \brief An input file.
1497 struct InputFileEntry {
1498 const FileEntry *File;
1501 bool BufferOverridden;
1503 } // end anonymous namespace
1505 void ASTWriter::WriteInputFiles(SourceManager &SourceMgr,
1506 HeaderSearchOptions &HSOpts,
1508 using namespace llvm;
1509 Stream.EnterSubblock(INPUT_FILES_BLOCK_ID, 4);
1511 // Create input-file abbreviation.
1512 auto *IFAbbrev = new BitCodeAbbrev();
1513 IFAbbrev->Add(BitCodeAbbrevOp(INPUT_FILE));
1514 IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ID
1515 IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 12)); // Size
1516 IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 32)); // Modification time
1517 IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Overridden
1518 IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Transient
1519 IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // File name
1520 unsigned IFAbbrevCode = Stream.EmitAbbrev(IFAbbrev);
1522 // Get all ContentCache objects for files, sorted by whether the file is a
1523 // system one or not. System files go at the back, users files at the front.
1524 std::deque<InputFileEntry> SortedFiles;
1525 for (unsigned I = 1, N = SourceMgr.local_sloc_entry_size(); I != N; ++I) {
1526 // Get this source location entry.
1527 const SrcMgr::SLocEntry *SLoc = &SourceMgr.getLocalSLocEntry(I);
1528 assert(&SourceMgr.getSLocEntry(FileID::get(I)) == SLoc);
1530 // We only care about file entries that were not overridden.
1531 if (!SLoc->isFile())
1533 const SrcMgr::ContentCache *Cache = SLoc->getFile().getContentCache();
1534 if (!Cache->OrigEntry)
1537 InputFileEntry Entry;
1538 Entry.File = Cache->OrigEntry;
1539 Entry.IsSystemFile = Cache->IsSystemFile;
1540 Entry.IsTransient = Cache->IsTransient;
1541 Entry.BufferOverridden = Cache->BufferOverridden;
1542 if (Cache->IsSystemFile)
1543 SortedFiles.push_back(Entry);
1545 SortedFiles.push_front(Entry);
1548 unsigned UserFilesNum = 0;
1549 // Write out all of the input files.
1550 std::vector<uint64_t> InputFileOffsets;
1551 for (const auto &Entry : SortedFiles) {
1552 uint32_t &InputFileID = InputFileIDs[Entry.File];
1553 if (InputFileID != 0)
1554 continue; // already recorded this file.
1556 // Record this entry's offset.
1557 InputFileOffsets.push_back(Stream.GetCurrentBitNo());
1559 InputFileID = InputFileOffsets.size();
1561 if (!Entry.IsSystemFile)
1564 // Emit size/modification time for this file.
1565 // And whether this file was overridden.
1566 RecordData::value_type Record[] = {
1568 InputFileOffsets.size(),
1569 (uint64_t)Entry.File->getSize(),
1570 (uint64_t)getTimestampForOutput(Entry.File),
1571 Entry.BufferOverridden,
1574 EmitRecordWithPath(IFAbbrevCode, Record, Entry.File->getName());
1579 // Create input file offsets abbreviation.
1580 auto *OffsetsAbbrev = new BitCodeAbbrev();
1581 OffsetsAbbrev->Add(BitCodeAbbrevOp(INPUT_FILE_OFFSETS));
1582 OffsetsAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // # input files
1583 OffsetsAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // # non-system
1585 OffsetsAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Array
1586 unsigned OffsetsAbbrevCode = Stream.EmitAbbrev(OffsetsAbbrev);
1588 // Write input file offsets.
1589 RecordData::value_type Record[] = {INPUT_FILE_OFFSETS,
1590 InputFileOffsets.size(), UserFilesNum};
1591 Stream.EmitRecordWithBlob(OffsetsAbbrevCode, Record, bytes(InputFileOffsets));
1594 //===----------------------------------------------------------------------===//
1595 // Source Manager Serialization
1596 //===----------------------------------------------------------------------===//
1598 /// \brief Create an abbreviation for the SLocEntry that refers to a
1600 static unsigned CreateSLocFileAbbrev(llvm::BitstreamWriter &Stream) {
1601 using namespace llvm;
1603 auto *Abbrev = new BitCodeAbbrev();
1604 Abbrev->Add(BitCodeAbbrevOp(SM_SLOC_FILE_ENTRY));
1605 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Offset
1606 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Include location
1607 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2)); // Characteristic
1608 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Line directives
1609 // FileEntry fields.
1610 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Input File ID
1611 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // NumCreatedFIDs
1612 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 24)); // FirstDeclIndex
1613 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // NumDecls
1614 return Stream.EmitAbbrev(Abbrev);
1617 /// \brief Create an abbreviation for the SLocEntry that refers to a
1619 static unsigned CreateSLocBufferAbbrev(llvm::BitstreamWriter &Stream) {
1620 using namespace llvm;
1622 auto *Abbrev = new BitCodeAbbrev();
1623 Abbrev->Add(BitCodeAbbrevOp(SM_SLOC_BUFFER_ENTRY));
1624 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Offset
1625 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Include location
1626 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2)); // Characteristic
1627 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Line directives
1628 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Buffer name blob
1629 return Stream.EmitAbbrev(Abbrev);
1632 /// \brief Create an abbreviation for the SLocEntry that refers to a
1634 static unsigned CreateSLocBufferBlobAbbrev(llvm::BitstreamWriter &Stream) {
1635 using namespace llvm;
1637 auto *Abbrev = new BitCodeAbbrev();
1638 Abbrev->Add(BitCodeAbbrevOp(SM_SLOC_BUFFER_BLOB));
1639 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Blob
1640 return Stream.EmitAbbrev(Abbrev);
1643 /// \brief Create an abbreviation for the SLocEntry that refers to a macro
1645 static unsigned CreateSLocExpansionAbbrev(llvm::BitstreamWriter &Stream) {
1646 using namespace llvm;
1648 auto *Abbrev = new BitCodeAbbrev();
1649 Abbrev->Add(BitCodeAbbrevOp(SM_SLOC_EXPANSION_ENTRY));
1650 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Offset
1651 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Spelling location
1652 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Start location
1653 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // End location
1654 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Token length
1655 return Stream.EmitAbbrev(Abbrev);
1659 // Trait used for the on-disk hash table of header search information.
1660 class HeaderFileInfoTrait {
1662 const HeaderSearch &HS;
1664 // Keep track of the framework names we've used during serialization.
1665 SmallVector<char, 128> FrameworkStringData;
1666 llvm::StringMap<unsigned> FrameworkNameOffset;
1669 HeaderFileInfoTrait(ASTWriter &Writer, const HeaderSearch &HS)
1670 : Writer(Writer), HS(HS) { }
1673 const FileEntry *FE;
1674 const char *Filename;
1676 typedef const key_type &key_type_ref;
1678 typedef HeaderFileInfo data_type;
1679 typedef const data_type &data_type_ref;
1680 typedef unsigned hash_value_type;
1681 typedef unsigned offset_type;
1683 hash_value_type ComputeHash(key_type_ref key) {
1684 // The hash is based only on size/time of the file, so that the reader can
1685 // match even when symlinking or excess path elements ("foo/../", "../")
1686 // change the form of the name. However, complete path is still the key.
1687 return llvm::hash_combine(key.FE->getSize(),
1688 Writer.getTimestampForOutput(key.FE));
1691 std::pair<unsigned,unsigned>
1692 EmitKeyDataLength(raw_ostream& Out, key_type_ref key, data_type_ref Data) {
1693 using namespace llvm::support;
1694 endian::Writer<little> LE(Out);
1695 unsigned KeyLen = strlen(key.Filename) + 1 + 8 + 8;
1696 LE.write<uint16_t>(KeyLen);
1697 unsigned DataLen = 1 + 2 + 4 + 4;
1698 for (auto ModInfo : HS.getModuleMap().findAllModulesForHeader(key.FE))
1699 if (Writer.getLocalOrImportedSubmoduleID(ModInfo.getModule()))
1701 LE.write<uint8_t>(DataLen);
1702 return std::make_pair(KeyLen, DataLen);
1705 void EmitKey(raw_ostream& Out, key_type_ref key, unsigned KeyLen) {
1706 using namespace llvm::support;
1707 endian::Writer<little> LE(Out);
1708 LE.write<uint64_t>(key.FE->getSize());
1710 LE.write<uint64_t>(Writer.getTimestampForOutput(key.FE));
1712 Out.write(key.Filename, KeyLen);
1715 void EmitData(raw_ostream &Out, key_type_ref key,
1716 data_type_ref Data, unsigned DataLen) {
1717 using namespace llvm::support;
1718 endian::Writer<little> LE(Out);
1719 uint64_t Start = Out.tell(); (void)Start;
1721 unsigned char Flags = (Data.isImport << 4)
1722 | (Data.isPragmaOnce << 3)
1723 | (Data.DirInfo << 1)
1724 | Data.IndexHeaderMapHeader;
1725 LE.write<uint8_t>(Flags);
1726 LE.write<uint16_t>(Data.NumIncludes);
1728 if (!Data.ControllingMacro)
1729 LE.write<uint32_t>(Data.ControllingMacroID);
1731 LE.write<uint32_t>(Writer.getIdentifierRef(Data.ControllingMacro));
1733 unsigned Offset = 0;
1734 if (!Data.Framework.empty()) {
1735 // If this header refers into a framework, save the framework name.
1736 llvm::StringMap<unsigned>::iterator Pos
1737 = FrameworkNameOffset.find(Data.Framework);
1738 if (Pos == FrameworkNameOffset.end()) {
1739 Offset = FrameworkStringData.size() + 1;
1740 FrameworkStringData.append(Data.Framework.begin(),
1741 Data.Framework.end());
1742 FrameworkStringData.push_back(0);
1744 FrameworkNameOffset[Data.Framework] = Offset;
1746 Offset = Pos->second;
1748 LE.write<uint32_t>(Offset);
1750 // FIXME: If the header is excluded, we should write out some
1751 // record of that fact.
1752 for (auto ModInfo : HS.getModuleMap().findAllModulesForHeader(key.FE)) {
1753 if (uint32_t ModID =
1754 Writer.getLocalOrImportedSubmoduleID(ModInfo.getModule())) {
1755 uint32_t Value = (ModID << 2) | (unsigned)ModInfo.getRole();
1756 assert((Value >> 2) == ModID && "overflow in header module info");
1757 LE.write<uint32_t>(Value);
1761 assert(Out.tell() - Start == DataLen && "Wrong data length");
1764 const char *strings_begin() const { return FrameworkStringData.begin(); }
1765 const char *strings_end() const { return FrameworkStringData.end(); }
1767 } // end anonymous namespace
1769 /// \brief Write the header search block for the list of files that
1771 /// \param HS The header search structure to save.
1772 void ASTWriter::WriteHeaderSearch(const HeaderSearch &HS) {
1773 SmallVector<const FileEntry *, 16> FilesByUID;
1774 HS.getFileMgr().GetUniqueIDMapping(FilesByUID);
1776 if (FilesByUID.size() > HS.header_file_size())
1777 FilesByUID.resize(HS.header_file_size());
1779 HeaderFileInfoTrait GeneratorTrait(*this, HS);
1780 llvm::OnDiskChainedHashTableGenerator<HeaderFileInfoTrait> Generator;
1781 SmallVector<const char *, 4> SavedStrings;
1782 unsigned NumHeaderSearchEntries = 0;
1783 for (unsigned UID = 0, LastUID = FilesByUID.size(); UID != LastUID; ++UID) {
1784 const FileEntry *File = FilesByUID[UID];
1788 // Get the file info. This will load info from the external source if
1789 // necessary. Skip emitting this file if we have no information on it
1790 // as a header file (in which case HFI will be null) or if it hasn't
1791 // changed since it was loaded. Also skip it if it's for a modular header
1792 // from a different module; in that case, we rely on the module(s)
1793 // containing the header to provide this information.
1794 const HeaderFileInfo *HFI =
1795 HS.getExistingFileInfo(File, /*WantExternal*/!Chain);
1796 if (!HFI || (HFI->isModuleHeader && !HFI->isCompilingModuleHeader))
1799 // Massage the file path into an appropriate form.
1800 const char *Filename = File->getName();
1801 SmallString<128> FilenameTmp(Filename);
1802 if (PreparePathForOutput(FilenameTmp)) {
1803 // If we performed any translation on the file name at all, we need to
1804 // save this string, since the generator will refer to it later.
1805 Filename = strdup(FilenameTmp.c_str());
1806 SavedStrings.push_back(Filename);
1809 HeaderFileInfoTrait::key_type key = { File, Filename };
1810 Generator.insert(key, *HFI, GeneratorTrait);
1811 ++NumHeaderSearchEntries;
1814 // Create the on-disk hash table in a buffer.
1815 SmallString<4096> TableData;
1816 uint32_t BucketOffset;
1818 using namespace llvm::support;
1819 llvm::raw_svector_ostream Out(TableData);
1820 // Make sure that no bucket is at offset 0
1821 endian::Writer<little>(Out).write<uint32_t>(0);
1822 BucketOffset = Generator.Emit(Out, GeneratorTrait);
1825 // Create a blob abbreviation
1826 using namespace llvm;
1828 auto *Abbrev = new BitCodeAbbrev();
1829 Abbrev->Add(BitCodeAbbrevOp(HEADER_SEARCH_TABLE));
1830 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
1831 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
1832 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
1833 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
1834 unsigned TableAbbrev = Stream.EmitAbbrev(Abbrev);
1836 // Write the header search table
1837 RecordData::value_type Record[] = {HEADER_SEARCH_TABLE, BucketOffset,
1838 NumHeaderSearchEntries, TableData.size()};
1839 TableData.append(GeneratorTrait.strings_begin(),GeneratorTrait.strings_end());
1840 Stream.EmitRecordWithBlob(TableAbbrev, Record, TableData);
1842 // Free all of the strings we had to duplicate.
1843 for (unsigned I = 0, N = SavedStrings.size(); I != N; ++I)
1844 free(const_cast<char *>(SavedStrings[I]));
1847 /// \brief Writes the block containing the serialized form of the
1850 /// TODO: We should probably use an on-disk hash table (stored in a
1851 /// blob), indexed based on the file name, so that we only create
1852 /// entries for files that we actually need. In the common case (no
1853 /// errors), we probably won't have to create file entries for any of
1854 /// the files in the AST.
1855 void ASTWriter::WriteSourceManagerBlock(SourceManager &SourceMgr,
1856 const Preprocessor &PP) {
1859 // Enter the source manager block.
1860 Stream.EnterSubblock(SOURCE_MANAGER_BLOCK_ID, 3);
1862 // Abbreviations for the various kinds of source-location entries.
1863 unsigned SLocFileAbbrv = CreateSLocFileAbbrev(Stream);
1864 unsigned SLocBufferAbbrv = CreateSLocBufferAbbrev(Stream);
1865 unsigned SLocBufferBlobAbbrv = CreateSLocBufferBlobAbbrev(Stream);
1866 unsigned SLocExpansionAbbrv = CreateSLocExpansionAbbrev(Stream);
1868 // Write out the source location entry table. We skip the first
1869 // entry, which is always the same dummy entry.
1870 std::vector<uint32_t> SLocEntryOffsets;
1871 RecordData PreloadSLocs;
1872 SLocEntryOffsets.reserve(SourceMgr.local_sloc_entry_size() - 1);
1873 for (unsigned I = 1, N = SourceMgr.local_sloc_entry_size();
1875 // Get this source location entry.
1876 const SrcMgr::SLocEntry *SLoc = &SourceMgr.getLocalSLocEntry(I);
1877 FileID FID = FileID::get(I);
1878 assert(&SourceMgr.getSLocEntry(FID) == SLoc);
1880 // Record the offset of this source-location entry.
1881 SLocEntryOffsets.push_back(Stream.GetCurrentBitNo());
1883 // Figure out which record code to use.
1885 if (SLoc->isFile()) {
1886 const SrcMgr::ContentCache *Cache = SLoc->getFile().getContentCache();
1887 if (Cache->OrigEntry) {
1888 Code = SM_SLOC_FILE_ENTRY;
1890 Code = SM_SLOC_BUFFER_ENTRY;
1892 Code = SM_SLOC_EXPANSION_ENTRY;
1894 Record.push_back(Code);
1896 // Starting offset of this entry within this module, so skip the dummy.
1897 Record.push_back(SLoc->getOffset() - 2);
1898 if (SLoc->isFile()) {
1899 const SrcMgr::FileInfo &File = SLoc->getFile();
1900 Record.push_back(File.getIncludeLoc().getRawEncoding());
1901 Record.push_back(File.getFileCharacteristic()); // FIXME: stable encoding
1902 Record.push_back(File.hasLineDirectives());
1904 const SrcMgr::ContentCache *Content = File.getContentCache();
1905 if (Content->OrigEntry) {
1906 assert(Content->OrigEntry == Content->ContentsEntry &&
1907 "Writing to AST an overridden file is not supported");
1909 // The source location entry is a file. Emit input file ID.
1910 assert(InputFileIDs[Content->OrigEntry] != 0 && "Missed file entry");
1911 Record.push_back(InputFileIDs[Content->OrigEntry]);
1913 Record.push_back(File.NumCreatedFIDs);
1915 FileDeclIDsTy::iterator FDI = FileDeclIDs.find(FID);
1916 if (FDI != FileDeclIDs.end()) {
1917 Record.push_back(FDI->second->FirstDeclIndex);
1918 Record.push_back(FDI->second->DeclIDs.size());
1920 Record.push_back(0);
1921 Record.push_back(0);
1924 Stream.EmitRecordWithAbbrev(SLocFileAbbrv, Record);
1926 if (Content->BufferOverridden || Content->IsTransient) {
1927 RecordData::value_type Record[] = {SM_SLOC_BUFFER_BLOB};
1928 const llvm::MemoryBuffer *Buffer
1929 = Content->getBuffer(PP.getDiagnostics(), PP.getSourceManager());
1930 Stream.EmitRecordWithBlob(SLocBufferBlobAbbrv, Record,
1931 StringRef(Buffer->getBufferStart(),
1932 Buffer->getBufferSize() + 1));
1935 // The source location entry is a buffer. The blob associated
1936 // with this entry contains the contents of the buffer.
1938 // We add one to the size so that we capture the trailing NULL
1939 // that is required by llvm::MemoryBuffer::getMemBuffer (on
1940 // the reader side).
1941 const llvm::MemoryBuffer *Buffer
1942 = Content->getBuffer(PP.getDiagnostics(), PP.getSourceManager());
1943 const char *Name = Buffer->getBufferIdentifier();
1944 Stream.EmitRecordWithBlob(SLocBufferAbbrv, Record,
1945 StringRef(Name, strlen(Name) + 1));
1946 RecordData::value_type Record[] = {SM_SLOC_BUFFER_BLOB};
1947 Stream.EmitRecordWithBlob(SLocBufferBlobAbbrv, Record,
1948 StringRef(Buffer->getBufferStart(),
1949 Buffer->getBufferSize() + 1));
1951 if (strcmp(Name, "<built-in>") == 0) {
1952 PreloadSLocs.push_back(SLocEntryOffsets.size());
1956 // The source location entry is a macro expansion.
1957 const SrcMgr::ExpansionInfo &Expansion = SLoc->getExpansion();
1958 Record.push_back(Expansion.getSpellingLoc().getRawEncoding());
1959 Record.push_back(Expansion.getExpansionLocStart().getRawEncoding());
1960 Record.push_back(Expansion.isMacroArgExpansion() ? 0
1961 : Expansion.getExpansionLocEnd().getRawEncoding());
1963 // Compute the token length for this macro expansion.
1964 unsigned NextOffset = SourceMgr.getNextLocalOffset();
1966 NextOffset = SourceMgr.getLocalSLocEntry(I + 1).getOffset();
1967 Record.push_back(NextOffset - SLoc->getOffset() - 1);
1968 Stream.EmitRecordWithAbbrev(SLocExpansionAbbrv, Record);
1974 if (SLocEntryOffsets.empty())
1977 // Write the source-location offsets table into the AST block. This
1978 // table is used for lazily loading source-location information.
1979 using namespace llvm;
1981 auto *Abbrev = new BitCodeAbbrev();
1982 Abbrev->Add(BitCodeAbbrevOp(SOURCE_LOCATION_OFFSETS));
1983 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 16)); // # of slocs
1984 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 16)); // total size
1985 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // offsets
1986 unsigned SLocOffsetsAbbrev = Stream.EmitAbbrev(Abbrev);
1988 RecordData::value_type Record[] = {
1989 SOURCE_LOCATION_OFFSETS, SLocEntryOffsets.size(),
1990 SourceMgr.getNextLocalOffset() - 1 /* skip dummy */};
1991 Stream.EmitRecordWithBlob(SLocOffsetsAbbrev, Record,
1992 bytes(SLocEntryOffsets));
1994 // Write the source location entry preloads array, telling the AST
1995 // reader which source locations entries it should load eagerly.
1996 Stream.EmitRecord(SOURCE_LOCATION_PRELOADS, PreloadSLocs);
1998 // Write the line table. It depends on remapping working, so it must come
1999 // after the source location offsets.
2000 if (SourceMgr.hasLineTable()) {
2001 LineTableInfo &LineTable = SourceMgr.getLineTable();
2005 // Emit the needed file names.
2006 llvm::DenseMap<int, int> FilenameMap;
2007 for (const auto &L : LineTable) {
2010 for (auto &LE : L.second) {
2011 if (FilenameMap.insert(std::make_pair(LE.FilenameID,
2012 FilenameMap.size())).second)
2013 AddPath(LineTable.getFilename(LE.FilenameID), Record);
2016 Record.push_back(0);
2018 // Emit the line entries
2019 for (const auto &L : LineTable) {
2020 // Only emit entries for local files.
2025 Record.push_back(L.first.ID);
2027 // Emit the line entries
2028 Record.push_back(L.second.size());
2029 for (const auto &LE : L.second) {
2030 Record.push_back(LE.FileOffset);
2031 Record.push_back(LE.LineNo);
2032 Record.push_back(FilenameMap[LE.FilenameID]);
2033 Record.push_back((unsigned)LE.FileKind);
2034 Record.push_back(LE.IncludeOffset);
2038 Stream.EmitRecord(SOURCE_MANAGER_LINE_TABLE, Record);
2042 //===----------------------------------------------------------------------===//
2043 // Preprocessor Serialization
2044 //===----------------------------------------------------------------------===//
2046 static bool shouldIgnoreMacro(MacroDirective *MD, bool IsModule,
2047 const Preprocessor &PP) {
2048 if (MacroInfo *MI = MD->getMacroInfo())
2049 if (MI->isBuiltinMacro())
2053 SourceLocation Loc = MD->getLocation();
2054 if (Loc.isInvalid())
2056 if (PP.getSourceManager().getFileID(Loc) == PP.getPredefinesFileID())
2063 /// \brief Writes the block containing the serialized form of the
2066 void ASTWriter::WritePreprocessor(const Preprocessor &PP, bool IsModule) {
2067 PreprocessingRecord *PPRec = PP.getPreprocessingRecord();
2069 WritePreprocessorDetail(*PPRec);
2072 RecordData ModuleMacroRecord;
2074 // If the preprocessor __COUNTER__ value has been bumped, remember it.
2075 if (PP.getCounterValue() != 0) {
2076 RecordData::value_type Record[] = {PP.getCounterValue()};
2077 Stream.EmitRecord(PP_COUNTER_VALUE, Record);
2080 // Enter the preprocessor block.
2081 Stream.EnterSubblock(PREPROCESSOR_BLOCK_ID, 3);
2083 // If the AST file contains __DATE__ or __TIME__ emit a warning about this.
2084 // FIXME: Include a location for the use, and say which one was used.
2085 if (PP.SawDateOrTime())
2086 PP.Diag(SourceLocation(), diag::warn_module_uses_date_time) << IsModule;
2088 // Loop over all the macro directives that are live at the end of the file,
2089 // emitting each to the PP section.
2091 // Construct the list of identifiers with macro directives that need to be
2093 SmallVector<const IdentifierInfo *, 128> MacroIdentifiers;
2094 for (auto &Id : PP.getIdentifierTable())
2095 if (Id.second->hadMacroDefinition() &&
2096 (!Id.second->isFromAST() ||
2097 Id.second->hasChangedSinceDeserialization()))
2098 MacroIdentifiers.push_back(Id.second);
2099 // Sort the set of macro definitions that need to be serialized by the
2100 // name of the macro, to provide a stable ordering.
2101 std::sort(MacroIdentifiers.begin(), MacroIdentifiers.end(),
2102 llvm::less_ptr<IdentifierInfo>());
2104 // Emit the macro directives as a list and associate the offset with the
2105 // identifier they belong to.
2106 for (const IdentifierInfo *Name : MacroIdentifiers) {
2107 MacroDirective *MD = PP.getLocalMacroDirectiveHistory(Name);
2108 auto StartOffset = Stream.GetCurrentBitNo();
2110 // Emit the macro directives in reverse source order.
2111 for (; MD; MD = MD->getPrevious()) {
2112 // Once we hit an ignored macro, we're done: the rest of the chain
2113 // will all be ignored macros.
2114 if (shouldIgnoreMacro(MD, IsModule, PP))
2117 AddSourceLocation(MD->getLocation(), Record);
2118 Record.push_back(MD->getKind());
2119 if (auto *DefMD = dyn_cast<DefMacroDirective>(MD)) {
2120 Record.push_back(getMacroRef(DefMD->getInfo(), Name));
2121 } else if (auto *VisMD = dyn_cast<VisibilityMacroDirective>(MD)) {
2122 Record.push_back(VisMD->isPublic());
2126 // Write out any exported module macros.
2127 bool EmittedModuleMacros = false;
2129 auto Leafs = PP.getLeafModuleMacros(Name);
2130 SmallVector<ModuleMacro*, 8> Worklist(Leafs.begin(), Leafs.end());
2131 llvm::DenseMap<ModuleMacro*, unsigned> Visits;
2132 while (!Worklist.empty()) {
2133 auto *Macro = Worklist.pop_back_val();
2135 // Emit a record indicating this submodule exports this macro.
2136 ModuleMacroRecord.push_back(
2137 getSubmoduleID(Macro->getOwningModule()));
2138 ModuleMacroRecord.push_back(getMacroRef(Macro->getMacroInfo(), Name));
2139 for (auto *M : Macro->overrides())
2140 ModuleMacroRecord.push_back(getSubmoduleID(M->getOwningModule()));
2142 Stream.EmitRecord(PP_MODULE_MACRO, ModuleMacroRecord);
2143 ModuleMacroRecord.clear();
2145 // Enqueue overridden macros once we've visited all their ancestors.
2146 for (auto *M : Macro->overrides())
2147 if (++Visits[M] == M->getNumOverridingMacros())
2148 Worklist.push_back(M);
2150 EmittedModuleMacros = true;
2154 if (Record.empty() && !EmittedModuleMacros)
2157 IdentMacroDirectivesOffsetMap[Name] = StartOffset;
2158 Stream.EmitRecord(PP_MACRO_DIRECTIVE_HISTORY, Record);
2162 /// \brief Offsets of each of the macros into the bitstream, indexed by
2163 /// the local macro ID
2165 /// For each identifier that is associated with a macro, this map
2166 /// provides the offset into the bitstream where that macro is
2168 std::vector<uint32_t> MacroOffsets;
2170 for (unsigned I = 0, N = MacroInfosToEmit.size(); I != N; ++I) {
2171 const IdentifierInfo *Name = MacroInfosToEmit[I].Name;
2172 MacroInfo *MI = MacroInfosToEmit[I].MI;
2173 MacroID ID = MacroInfosToEmit[I].ID;
2175 if (ID < FirstMacroID) {
2176 assert(0 && "Loaded MacroInfo entered MacroInfosToEmit ?");
2180 // Record the local offset of this macro.
2181 unsigned Index = ID - FirstMacroID;
2182 if (Index == MacroOffsets.size())
2183 MacroOffsets.push_back(Stream.GetCurrentBitNo());
2185 if (Index > MacroOffsets.size())
2186 MacroOffsets.resize(Index + 1);
2188 MacroOffsets[Index] = Stream.GetCurrentBitNo();
2191 AddIdentifierRef(Name, Record);
2192 Record.push_back(inferSubmoduleIDFromLocation(MI->getDefinitionLoc()));
2193 AddSourceLocation(MI->getDefinitionLoc(), Record);
2194 AddSourceLocation(MI->getDefinitionEndLoc(), Record);
2195 Record.push_back(MI->isUsed());
2196 Record.push_back(MI->isUsedForHeaderGuard());
2198 if (MI->isObjectLike()) {
2199 Code = PP_MACRO_OBJECT_LIKE;
2201 Code = PP_MACRO_FUNCTION_LIKE;
2203 Record.push_back(MI->isC99Varargs());
2204 Record.push_back(MI->isGNUVarargs());
2205 Record.push_back(MI->hasCommaPasting());
2206 Record.push_back(MI->getNumArgs());
2207 for (const IdentifierInfo *Arg : MI->args())
2208 AddIdentifierRef(Arg, Record);
2211 // If we have a detailed preprocessing record, record the macro definition
2212 // ID that corresponds to this macro.
2214 Record.push_back(MacroDefinitions[PPRec->findMacroDefinition(MI)]);
2216 Stream.EmitRecord(Code, Record);
2219 // Emit the tokens array.
2220 for (unsigned TokNo = 0, e = MI->getNumTokens(); TokNo != e; ++TokNo) {
2221 // Note that we know that the preprocessor does not have any annotation
2222 // tokens in it because they are created by the parser, and thus can't
2223 // be in a macro definition.
2224 const Token &Tok = MI->getReplacementToken(TokNo);
2225 AddToken(Tok, Record);
2226 Stream.EmitRecord(PP_TOKEN, Record);
2234 // Write the offsets table for macro IDs.
2235 using namespace llvm;
2237 auto *Abbrev = new BitCodeAbbrev();
2238 Abbrev->Add(BitCodeAbbrevOp(MACRO_OFFSET));
2239 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // # of macros
2240 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // first ID
2241 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
2243 unsigned MacroOffsetAbbrev = Stream.EmitAbbrev(Abbrev);
2245 RecordData::value_type Record[] = {MACRO_OFFSET, MacroOffsets.size(),
2246 FirstMacroID - NUM_PREDEF_MACRO_IDS};
2247 Stream.EmitRecordWithBlob(MacroOffsetAbbrev, Record, bytes(MacroOffsets));
2251 void ASTWriter::WritePreprocessorDetail(PreprocessingRecord &PPRec) {
2252 if (PPRec.local_begin() == PPRec.local_end())
2255 SmallVector<PPEntityOffset, 64> PreprocessedEntityOffsets;
2257 // Enter the preprocessor block.
2258 Stream.EnterSubblock(PREPROCESSOR_DETAIL_BLOCK_ID, 3);
2260 // If the preprocessor has a preprocessing record, emit it.
2261 unsigned NumPreprocessingRecords = 0;
2262 using namespace llvm;
2264 // Set up the abbreviation for
2265 unsigned InclusionAbbrev = 0;
2267 auto *Abbrev = new BitCodeAbbrev();
2268 Abbrev->Add(BitCodeAbbrevOp(PPD_INCLUSION_DIRECTIVE));
2269 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // filename length
2270 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // in quotes
2271 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2)); // kind
2272 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // imported module
2273 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
2274 InclusionAbbrev = Stream.EmitAbbrev(Abbrev);
2277 unsigned FirstPreprocessorEntityID
2278 = (Chain ? PPRec.getNumLoadedPreprocessedEntities() : 0)
2279 + NUM_PREDEF_PP_ENTITY_IDS;
2280 unsigned NextPreprocessorEntityID = FirstPreprocessorEntityID;
2282 for (PreprocessingRecord::iterator E = PPRec.local_begin(),
2283 EEnd = PPRec.local_end();
2285 (void)++E, ++NumPreprocessingRecords, ++NextPreprocessorEntityID) {
2288 PreprocessedEntityOffsets.push_back(
2289 PPEntityOffset((*E)->getSourceRange(), Stream.GetCurrentBitNo()));
2291 if (auto *MD = dyn_cast<MacroDefinitionRecord>(*E)) {
2292 // Record this macro definition's ID.
2293 MacroDefinitions[MD] = NextPreprocessorEntityID;
2295 AddIdentifierRef(MD->getName(), Record);
2296 Stream.EmitRecord(PPD_MACRO_DEFINITION, Record);
2300 if (auto *ME = dyn_cast<MacroExpansion>(*E)) {
2301 Record.push_back(ME->isBuiltinMacro());
2302 if (ME->isBuiltinMacro())
2303 AddIdentifierRef(ME->getName(), Record);
2305 Record.push_back(MacroDefinitions[ME->getDefinition()]);
2306 Stream.EmitRecord(PPD_MACRO_EXPANSION, Record);
2310 if (auto *ID = dyn_cast<InclusionDirective>(*E)) {
2311 Record.push_back(PPD_INCLUSION_DIRECTIVE);
2312 Record.push_back(ID->getFileName().size());
2313 Record.push_back(ID->wasInQuotes());
2314 Record.push_back(static_cast<unsigned>(ID->getKind()));
2315 Record.push_back(ID->importedModule());
2316 SmallString<64> Buffer;
2317 Buffer += ID->getFileName();
2318 // Check that the FileEntry is not null because it was not resolved and
2319 // we create a PCH even with compiler errors.
2321 Buffer += ID->getFile()->getName();
2322 Stream.EmitRecordWithBlob(InclusionAbbrev, Record, Buffer);
2326 llvm_unreachable("Unhandled PreprocessedEntity in ASTWriter");
2330 // Write the offsets table for the preprocessing record.
2331 if (NumPreprocessingRecords > 0) {
2332 assert(PreprocessedEntityOffsets.size() == NumPreprocessingRecords);
2334 // Write the offsets table for identifier IDs.
2335 using namespace llvm;
2337 auto *Abbrev = new BitCodeAbbrev();
2338 Abbrev->Add(BitCodeAbbrevOp(PPD_ENTITIES_OFFSETS));
2339 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // first pp entity
2340 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
2341 unsigned PPEOffsetAbbrev = Stream.EmitAbbrev(Abbrev);
2343 RecordData::value_type Record[] = {PPD_ENTITIES_OFFSETS,
2344 FirstPreprocessorEntityID -
2345 NUM_PREDEF_PP_ENTITY_IDS};
2346 Stream.EmitRecordWithBlob(PPEOffsetAbbrev, Record,
2347 bytes(PreprocessedEntityOffsets));
2351 unsigned ASTWriter::getLocalOrImportedSubmoduleID(Module *Mod) {
2355 llvm::DenseMap<Module *, unsigned>::iterator Known = SubmoduleIDs.find(Mod);
2356 if (Known != SubmoduleIDs.end())
2357 return Known->second;
2359 if (Mod->getTopLevelModule() != WritingModule)
2362 return SubmoduleIDs[Mod] = NextSubmoduleID++;
2365 unsigned ASTWriter::getSubmoduleID(Module *Mod) {
2366 // FIXME: This can easily happen, if we have a reference to a submodule that
2367 // did not result in us loading a module file for that submodule. For
2368 // instance, a cross-top-level-module 'conflict' declaration will hit this.
2369 unsigned ID = getLocalOrImportedSubmoduleID(Mod);
2370 assert((ID || !Mod) &&
2371 "asked for module ID for non-local, non-imported module");
2375 /// \brief Compute the number of modules within the given tree (including the
2377 static unsigned getNumberOfModules(Module *Mod) {
2378 unsigned ChildModules = 0;
2379 for (auto Sub = Mod->submodule_begin(), SubEnd = Mod->submodule_end();
2380 Sub != SubEnd; ++Sub)
2381 ChildModules += getNumberOfModules(*Sub);
2383 return ChildModules + 1;
2386 void ASTWriter::WriteSubmodules(Module *WritingModule) {
2387 // Enter the submodule description block.
2388 Stream.EnterSubblock(SUBMODULE_BLOCK_ID, /*bits for abbreviations*/5);
2390 // Write the abbreviations needed for the submodules block.
2391 using namespace llvm;
2393 auto *Abbrev = new BitCodeAbbrev();
2394 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_DEFINITION));
2395 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ID
2396 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Parent
2397 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsFramework
2398 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsExplicit
2399 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsSystem
2400 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsExternC
2401 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // InferSubmodules...
2402 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // InferExplicit...
2403 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // InferExportWild...
2404 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ConfigMacrosExh...
2405 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2406 unsigned DefinitionAbbrev = Stream.EmitAbbrev(Abbrev);
2408 Abbrev = new BitCodeAbbrev();
2409 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_UMBRELLA_HEADER));
2410 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2411 unsigned UmbrellaAbbrev = Stream.EmitAbbrev(Abbrev);
2413 Abbrev = new BitCodeAbbrev();
2414 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_HEADER));
2415 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2416 unsigned HeaderAbbrev = Stream.EmitAbbrev(Abbrev);
2418 Abbrev = new BitCodeAbbrev();
2419 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_TOPHEADER));
2420 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2421 unsigned TopHeaderAbbrev = Stream.EmitAbbrev(Abbrev);
2423 Abbrev = new BitCodeAbbrev();
2424 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_UMBRELLA_DIR));
2425 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2426 unsigned UmbrellaDirAbbrev = Stream.EmitAbbrev(Abbrev);
2428 Abbrev = new BitCodeAbbrev();
2429 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_REQUIRES));
2430 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // State
2431 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Feature
2432 unsigned RequiresAbbrev = Stream.EmitAbbrev(Abbrev);
2434 Abbrev = new BitCodeAbbrev();
2435 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_EXCLUDED_HEADER));
2436 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2437 unsigned ExcludedHeaderAbbrev = Stream.EmitAbbrev(Abbrev);
2439 Abbrev = new BitCodeAbbrev();
2440 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_TEXTUAL_HEADER));
2441 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2442 unsigned TextualHeaderAbbrev = Stream.EmitAbbrev(Abbrev);
2444 Abbrev = new BitCodeAbbrev();
2445 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_PRIVATE_HEADER));
2446 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2447 unsigned PrivateHeaderAbbrev = Stream.EmitAbbrev(Abbrev);
2449 Abbrev = new BitCodeAbbrev();
2450 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_PRIVATE_TEXTUAL_HEADER));
2451 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2452 unsigned PrivateTextualHeaderAbbrev = Stream.EmitAbbrev(Abbrev);
2454 Abbrev = new BitCodeAbbrev();
2455 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_LINK_LIBRARY));
2456 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsFramework
2457 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2458 unsigned LinkLibraryAbbrev = Stream.EmitAbbrev(Abbrev);
2460 Abbrev = new BitCodeAbbrev();
2461 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_CONFIG_MACRO));
2462 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Macro name
2463 unsigned ConfigMacroAbbrev = Stream.EmitAbbrev(Abbrev);
2465 Abbrev = new BitCodeAbbrev();
2466 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_CONFLICT));
2467 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Other module
2468 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Message
2469 unsigned ConflictAbbrev = Stream.EmitAbbrev(Abbrev);
2471 // Write the submodule metadata block.
2472 RecordData::value_type Record[] = {getNumberOfModules(WritingModule),
2474 NUM_PREDEF_SUBMODULE_IDS};
2475 Stream.EmitRecord(SUBMODULE_METADATA, Record);
2477 // Write all of the submodules.
2478 std::queue<Module *> Q;
2479 Q.push(WritingModule);
2480 while (!Q.empty()) {
2481 Module *Mod = Q.front();
2483 unsigned ID = getSubmoduleID(Mod);
2485 uint64_t ParentID = 0;
2487 assert(SubmoduleIDs[Mod->Parent] && "Submodule parent not written?");
2488 ParentID = SubmoduleIDs[Mod->Parent];
2491 // Emit the definition of the block.
2493 RecordData::value_type Record[] = {
2494 SUBMODULE_DEFINITION, ID, ParentID, Mod->IsFramework, Mod->IsExplicit,
2495 Mod->IsSystem, Mod->IsExternC, Mod->InferSubmodules,
2496 Mod->InferExplicitSubmodules, Mod->InferExportWildcard,
2497 Mod->ConfigMacrosExhaustive};
2498 Stream.EmitRecordWithBlob(DefinitionAbbrev, Record, Mod->Name);
2501 // Emit the requirements.
2502 for (const auto &R : Mod->Requirements) {
2503 RecordData::value_type Record[] = {SUBMODULE_REQUIRES, R.second};
2504 Stream.EmitRecordWithBlob(RequiresAbbrev, Record, R.first);
2507 // Emit the umbrella header, if there is one.
2508 if (auto UmbrellaHeader = Mod->getUmbrellaHeader()) {
2509 RecordData::value_type Record[] = {SUBMODULE_UMBRELLA_HEADER};
2510 Stream.EmitRecordWithBlob(UmbrellaAbbrev, Record,
2511 UmbrellaHeader.NameAsWritten);
2512 } else if (auto UmbrellaDir = Mod->getUmbrellaDir()) {
2513 RecordData::value_type Record[] = {SUBMODULE_UMBRELLA_DIR};
2514 Stream.EmitRecordWithBlob(UmbrellaDirAbbrev, Record,
2515 UmbrellaDir.NameAsWritten);
2518 // Emit the headers.
2520 unsigned RecordKind;
2522 Module::HeaderKind HeaderKind;
2524 {SUBMODULE_HEADER, HeaderAbbrev, Module::HK_Normal},
2525 {SUBMODULE_TEXTUAL_HEADER, TextualHeaderAbbrev, Module::HK_Textual},
2526 {SUBMODULE_PRIVATE_HEADER, PrivateHeaderAbbrev, Module::HK_Private},
2527 {SUBMODULE_PRIVATE_TEXTUAL_HEADER, PrivateTextualHeaderAbbrev,
2528 Module::HK_PrivateTextual},
2529 {SUBMODULE_EXCLUDED_HEADER, ExcludedHeaderAbbrev, Module::HK_Excluded}
2531 for (auto &HL : HeaderLists) {
2532 RecordData::value_type Record[] = {HL.RecordKind};
2533 for (auto &H : Mod->Headers[HL.HeaderKind])
2534 Stream.EmitRecordWithBlob(HL.Abbrev, Record, H.NameAsWritten);
2537 // Emit the top headers.
2539 auto TopHeaders = Mod->getTopHeaders(PP->getFileManager());
2540 RecordData::value_type Record[] = {SUBMODULE_TOPHEADER};
2541 for (auto *H : TopHeaders)
2542 Stream.EmitRecordWithBlob(TopHeaderAbbrev, Record, H->getName());
2545 // Emit the imports.
2546 if (!Mod->Imports.empty()) {
2548 for (auto *I : Mod->Imports)
2549 Record.push_back(getSubmoduleID(I));
2550 Stream.EmitRecord(SUBMODULE_IMPORTS, Record);
2553 // Emit the exports.
2554 if (!Mod->Exports.empty()) {
2556 for (const auto &E : Mod->Exports) {
2557 // FIXME: This may fail; we don't require that all exported modules
2558 // are local or imported.
2559 Record.push_back(getSubmoduleID(E.getPointer()));
2560 Record.push_back(E.getInt());
2562 Stream.EmitRecord(SUBMODULE_EXPORTS, Record);
2565 //FIXME: How do we emit the 'use'd modules? They may not be submodules.
2566 // Might be unnecessary as use declarations are only used to build the
2569 // Emit the link libraries.
2570 for (const auto &LL : Mod->LinkLibraries) {
2571 RecordData::value_type Record[] = {SUBMODULE_LINK_LIBRARY,
2573 Stream.EmitRecordWithBlob(LinkLibraryAbbrev, Record, LL.Library);
2576 // Emit the conflicts.
2577 for (const auto &C : Mod->Conflicts) {
2578 // FIXME: This may fail; we don't require that all conflicting modules
2579 // are local or imported.
2580 RecordData::value_type Record[] = {SUBMODULE_CONFLICT,
2581 getSubmoduleID(C.Other)};
2582 Stream.EmitRecordWithBlob(ConflictAbbrev, Record, C.Message);
2585 // Emit the configuration macros.
2586 for (const auto &CM : Mod->ConfigMacros) {
2587 RecordData::value_type Record[] = {SUBMODULE_CONFIG_MACRO};
2588 Stream.EmitRecordWithBlob(ConfigMacroAbbrev, Record, CM);
2591 // Queue up the submodules of this module.
2592 for (auto *M : Mod->submodules())
2598 assert((NextSubmoduleID - FirstSubmoduleID ==
2599 getNumberOfModules(WritingModule)) &&
2600 "Wrong # of submodules; found a reference to a non-local, "
2601 "non-imported submodule?");
2604 serialization::SubmoduleID
2605 ASTWriter::inferSubmoduleIDFromLocation(SourceLocation Loc) {
2606 if (Loc.isInvalid() || !WritingModule)
2607 return 0; // No submodule
2609 // Find the module that owns this location.
2610 ModuleMap &ModMap = PP->getHeaderSearchInfo().getModuleMap();
2612 = ModMap.inferModuleFromLocation(FullSourceLoc(Loc,PP->getSourceManager()));
2616 // Check whether this submodule is part of our own module.
2617 if (WritingModule != OwningMod && !OwningMod->isSubModuleOf(WritingModule))
2620 return getSubmoduleID(OwningMod);
2623 void ASTWriter::WritePragmaDiagnosticMappings(const DiagnosticsEngine &Diag,
2625 // Make sure set diagnostic pragmas don't affect the translation unit that
2626 // imports the module.
2627 // FIXME: Make diagnostic pragma sections work properly with modules.
2631 llvm::SmallDenseMap<const DiagnosticsEngine::DiagState *, unsigned, 64>
2633 unsigned CurrID = 0;
2634 DiagStateIDMap[&Diag.DiagStates.front()] = ++CurrID; // the command-line one.
2636 for (DiagnosticsEngine::DiagStatePointsTy::const_iterator
2637 I = Diag.DiagStatePoints.begin(), E = Diag.DiagStatePoints.end();
2639 const DiagnosticsEngine::DiagStatePoint &point = *I;
2640 if (point.Loc.isInvalid())
2643 Record.push_back(point.Loc.getRawEncoding());
2644 unsigned &DiagStateID = DiagStateIDMap[point.State];
2645 Record.push_back(DiagStateID);
2647 if (DiagStateID == 0) {
2648 DiagStateID = ++CurrID;
2649 for (const auto &I : *(point.State)) {
2650 if (I.second.isPragma()) {
2651 Record.push_back(I.first);
2652 Record.push_back((unsigned)I.second.getSeverity());
2655 Record.push_back(-1); // mark the end of the diag/map pairs for this
2660 if (!Record.empty())
2661 Stream.EmitRecord(DIAG_PRAGMA_MAPPINGS, Record);
2664 void ASTWriter::WriteCXXCtorInitializersOffsets() {
2665 if (CXXCtorInitializersOffsets.empty())
2668 // Create a blob abbreviation for the C++ ctor initializer offsets.
2669 using namespace llvm;
2671 auto *Abbrev = new BitCodeAbbrev();
2672 Abbrev->Add(BitCodeAbbrevOp(CXX_CTOR_INITIALIZERS_OFFSETS));
2673 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // size
2674 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
2675 unsigned CtorInitializersOffsetAbbrev = Stream.EmitAbbrev(Abbrev);
2677 // Write the base specifier offsets table.
2678 RecordData::value_type Record[] = {CXX_CTOR_INITIALIZERS_OFFSETS,
2679 CXXCtorInitializersOffsets.size()};
2680 Stream.EmitRecordWithBlob(CtorInitializersOffsetAbbrev, Record,
2681 bytes(CXXCtorInitializersOffsets));
2684 void ASTWriter::WriteCXXBaseSpecifiersOffsets() {
2685 if (CXXBaseSpecifiersOffsets.empty())
2688 // Create a blob abbreviation for the C++ base specifiers offsets.
2689 using namespace llvm;
2691 auto *Abbrev = new BitCodeAbbrev();
2692 Abbrev->Add(BitCodeAbbrevOp(CXX_BASE_SPECIFIER_OFFSETS));
2693 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // size
2694 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
2695 unsigned BaseSpecifierOffsetAbbrev = Stream.EmitAbbrev(Abbrev);
2697 // Write the base specifier offsets table.
2698 RecordData::value_type Record[] = {CXX_BASE_SPECIFIER_OFFSETS,
2699 CXXBaseSpecifiersOffsets.size()};
2700 Stream.EmitRecordWithBlob(BaseSpecifierOffsetAbbrev, Record,
2701 bytes(CXXBaseSpecifiersOffsets));
2704 //===----------------------------------------------------------------------===//
2705 // Type Serialization
2706 //===----------------------------------------------------------------------===//
2708 /// \brief Write the representation of a type to the AST stream.
2709 void ASTWriter::WriteType(QualType T) {
2710 TypeIdx &Idx = TypeIdxs[T];
2711 if (Idx.getIndex() == 0) // we haven't seen this type before.
2712 Idx = TypeIdx(NextTypeID++);
2714 assert(Idx.getIndex() >= FirstTypeID && "Re-writing a type from a prior AST");
2716 // Record the offset for this type.
2717 unsigned Index = Idx.getIndex() - FirstTypeID;
2718 if (TypeOffsets.size() == Index)
2719 TypeOffsets.push_back(Stream.GetCurrentBitNo());
2720 else if (TypeOffsets.size() < Index) {
2721 TypeOffsets.resize(Index + 1);
2722 TypeOffsets[Index] = Stream.GetCurrentBitNo();
2727 // Emit the type's representation.
2728 ASTTypeWriter W(*this, Record);
2731 if (T.hasLocalNonFastQualifiers()) {
2732 Qualifiers Qs = T.getLocalQualifiers();
2733 AddTypeRef(T.getLocalUnqualifiedType(), Record);
2734 Record.push_back(Qs.getAsOpaqueValue());
2735 W.Code = TYPE_EXT_QUAL;
2736 W.AbbrevToUse = TypeExtQualAbbrev;
2738 switch (T->getTypeClass()) {
2739 // For all of the concrete, non-dependent types, call the
2740 // appropriate visitor function.
2741 #define TYPE(Class, Base) \
2742 case Type::Class: W.Visit##Class##Type(cast<Class##Type>(T)); break;
2743 #define ABSTRACT_TYPE(Class, Base)
2744 #include "clang/AST/TypeNodes.def"
2748 // Emit the serialized record.
2749 Stream.EmitRecord(W.Code, Record, W.AbbrevToUse);
2751 // Flush any expressions that were written as part of this type.
2755 //===----------------------------------------------------------------------===//
2756 // Declaration Serialization
2757 //===----------------------------------------------------------------------===//
2759 /// \brief Write the block containing all of the declaration IDs
2760 /// lexically declared within the given DeclContext.
2762 /// \returns the offset of the DECL_CONTEXT_LEXICAL block within the
2763 /// bistream, or 0 if no block was written.
2764 uint64_t ASTWriter::WriteDeclContextLexicalBlock(ASTContext &Context,
2766 if (DC->decls_empty())
2769 uint64_t Offset = Stream.GetCurrentBitNo();
2770 SmallVector<uint32_t, 128> KindDeclPairs;
2771 for (const auto *D : DC->decls()) {
2772 KindDeclPairs.push_back(D->getKind());
2773 KindDeclPairs.push_back(GetDeclRef(D));
2776 ++NumLexicalDeclContexts;
2777 RecordData::value_type Record[] = {DECL_CONTEXT_LEXICAL};
2778 Stream.EmitRecordWithBlob(DeclContextLexicalAbbrev, Record,
2779 bytes(KindDeclPairs));
2783 void ASTWriter::WriteTypeDeclOffsets() {
2784 using namespace llvm;
2786 // Write the type offsets array
2787 auto *Abbrev = new BitCodeAbbrev();
2788 Abbrev->Add(BitCodeAbbrevOp(TYPE_OFFSET));
2789 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // # of types
2790 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // base type index
2791 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // types block
2792 unsigned TypeOffsetAbbrev = Stream.EmitAbbrev(Abbrev);
2794 RecordData::value_type Record[] = {TYPE_OFFSET, TypeOffsets.size(),
2795 FirstTypeID - NUM_PREDEF_TYPE_IDS};
2796 Stream.EmitRecordWithBlob(TypeOffsetAbbrev, Record, bytes(TypeOffsets));
2799 // Write the declaration offsets array
2800 Abbrev = new BitCodeAbbrev();
2801 Abbrev->Add(BitCodeAbbrevOp(DECL_OFFSET));
2802 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // # of declarations
2803 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // base decl ID
2804 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // declarations block
2805 unsigned DeclOffsetAbbrev = Stream.EmitAbbrev(Abbrev);
2807 RecordData::value_type Record[] = {DECL_OFFSET, DeclOffsets.size(),
2808 FirstDeclID - NUM_PREDEF_DECL_IDS};
2809 Stream.EmitRecordWithBlob(DeclOffsetAbbrev, Record, bytes(DeclOffsets));
2813 void ASTWriter::WriteFileDeclIDsMap() {
2814 using namespace llvm;
2816 SmallVector<std::pair<FileID, DeclIDInFileInfo *>, 64> SortedFileDeclIDs(
2817 FileDeclIDs.begin(), FileDeclIDs.end());
2818 std::sort(SortedFileDeclIDs.begin(), SortedFileDeclIDs.end(),
2819 llvm::less_first());
2821 // Join the vectors of DeclIDs from all files.
2822 SmallVector<DeclID, 256> FileGroupedDeclIDs;
2823 for (auto &FileDeclEntry : SortedFileDeclIDs) {
2824 DeclIDInFileInfo &Info = *FileDeclEntry.second;
2825 Info.FirstDeclIndex = FileGroupedDeclIDs.size();
2826 for (auto &LocDeclEntry : Info.DeclIDs)
2827 FileGroupedDeclIDs.push_back(LocDeclEntry.second);
2830 auto *Abbrev = new BitCodeAbbrev();
2831 Abbrev->Add(BitCodeAbbrevOp(FILE_SORTED_DECLS));
2832 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
2833 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
2834 unsigned AbbrevCode = Stream.EmitAbbrev(Abbrev);
2835 RecordData::value_type Record[] = {FILE_SORTED_DECLS,
2836 FileGroupedDeclIDs.size()};
2837 Stream.EmitRecordWithBlob(AbbrevCode, Record, bytes(FileGroupedDeclIDs));
2840 void ASTWriter::WriteComments() {
2841 Stream.EnterSubblock(COMMENTS_BLOCK_ID, 3);
2842 ArrayRef<RawComment *> RawComments = Context->Comments.getComments();
2844 for (const auto *I : RawComments) {
2846 AddSourceRange(I->getSourceRange(), Record);
2847 Record.push_back(I->getKind());
2848 Record.push_back(I->isTrailingComment());
2849 Record.push_back(I->isAlmostTrailingComment());
2850 Stream.EmitRecord(COMMENTS_RAW_COMMENT, Record);
2855 //===----------------------------------------------------------------------===//
2856 // Global Method Pool and Selector Serialization
2857 //===----------------------------------------------------------------------===//
2860 // Trait used for the on-disk hash table used in the method pool.
2861 class ASTMethodPoolTrait {
2865 typedef Selector key_type;
2866 typedef key_type key_type_ref;
2870 ObjCMethodList Instance, Factory;
2872 typedef const data_type& data_type_ref;
2874 typedef unsigned hash_value_type;
2875 typedef unsigned offset_type;
2877 explicit ASTMethodPoolTrait(ASTWriter &Writer) : Writer(Writer) { }
2879 static hash_value_type ComputeHash(Selector Sel) {
2880 return serialization::ComputeHash(Sel);
2883 std::pair<unsigned,unsigned>
2884 EmitKeyDataLength(raw_ostream& Out, Selector Sel,
2885 data_type_ref Methods) {
2886 using namespace llvm::support;
2887 endian::Writer<little> LE(Out);
2888 unsigned KeyLen = 2 + (Sel.getNumArgs()? Sel.getNumArgs() * 4 : 4);
2889 LE.write<uint16_t>(KeyLen);
2890 unsigned DataLen = 4 + 2 + 2; // 2 bytes for each of the method counts
2891 for (const ObjCMethodList *Method = &Methods.Instance; Method;
2892 Method = Method->getNext())
2893 if (Method->getMethod())
2895 for (const ObjCMethodList *Method = &Methods.Factory; Method;
2896 Method = Method->getNext())
2897 if (Method->getMethod())
2899 LE.write<uint16_t>(DataLen);
2900 return std::make_pair(KeyLen, DataLen);
2903 void EmitKey(raw_ostream& Out, Selector Sel, unsigned) {
2904 using namespace llvm::support;
2905 endian::Writer<little> LE(Out);
2906 uint64_t Start = Out.tell();
2907 assert((Start >> 32) == 0 && "Selector key offset too large");
2908 Writer.SetSelectorOffset(Sel, Start);
2909 unsigned N = Sel.getNumArgs();
2910 LE.write<uint16_t>(N);
2913 for (unsigned I = 0; I != N; ++I)
2915 Writer.getIdentifierRef(Sel.getIdentifierInfoForSlot(I)));
2918 void EmitData(raw_ostream& Out, key_type_ref,
2919 data_type_ref Methods, unsigned DataLen) {
2920 using namespace llvm::support;
2921 endian::Writer<little> LE(Out);
2922 uint64_t Start = Out.tell(); (void)Start;
2923 LE.write<uint32_t>(Methods.ID);
2924 unsigned NumInstanceMethods = 0;
2925 for (const ObjCMethodList *Method = &Methods.Instance; Method;
2926 Method = Method->getNext())
2927 if (Method->getMethod())
2928 ++NumInstanceMethods;
2930 unsigned NumFactoryMethods = 0;
2931 for (const ObjCMethodList *Method = &Methods.Factory; Method;
2932 Method = Method->getNext())
2933 if (Method->getMethod())
2934 ++NumFactoryMethods;
2936 unsigned InstanceBits = Methods.Instance.getBits();
2937 assert(InstanceBits < 4);
2938 unsigned InstanceHasMoreThanOneDeclBit =
2939 Methods.Instance.hasMoreThanOneDecl();
2940 unsigned FullInstanceBits = (NumInstanceMethods << 3) |
2941 (InstanceHasMoreThanOneDeclBit << 2) |
2943 unsigned FactoryBits = Methods.Factory.getBits();
2944 assert(FactoryBits < 4);
2945 unsigned FactoryHasMoreThanOneDeclBit =
2946 Methods.Factory.hasMoreThanOneDecl();
2947 unsigned FullFactoryBits = (NumFactoryMethods << 3) |
2948 (FactoryHasMoreThanOneDeclBit << 2) |
2950 LE.write<uint16_t>(FullInstanceBits);
2951 LE.write<uint16_t>(FullFactoryBits);
2952 for (const ObjCMethodList *Method = &Methods.Instance; Method;
2953 Method = Method->getNext())
2954 if (Method->getMethod())
2955 LE.write<uint32_t>(Writer.getDeclID(Method->getMethod()));
2956 for (const ObjCMethodList *Method = &Methods.Factory; Method;
2957 Method = Method->getNext())
2958 if (Method->getMethod())
2959 LE.write<uint32_t>(Writer.getDeclID(Method->getMethod()));
2961 assert(Out.tell() - Start == DataLen && "Data length is wrong");
2964 } // end anonymous namespace
2966 /// \brief Write ObjC data: selectors and the method pool.
2968 /// The method pool contains both instance and factory methods, stored
2969 /// in an on-disk hash table indexed by the selector. The hash table also
2970 /// contains an empty entry for every other selector known to Sema.
2971 void ASTWriter::WriteSelectors(Sema &SemaRef) {
2972 using namespace llvm;
2974 // Do we have to do anything at all?
2975 if (SemaRef.MethodPool.empty() && SelectorIDs.empty())
2977 unsigned NumTableEntries = 0;
2978 // Create and write out the blob that contains selectors and the method pool.
2980 llvm::OnDiskChainedHashTableGenerator<ASTMethodPoolTrait> Generator;
2981 ASTMethodPoolTrait Trait(*this);
2983 // Create the on-disk hash table representation. We walk through every
2984 // selector we've seen and look it up in the method pool.
2985 SelectorOffsets.resize(NextSelectorID - FirstSelectorID);
2986 for (auto &SelectorAndID : SelectorIDs) {
2987 Selector S = SelectorAndID.first;
2988 SelectorID ID = SelectorAndID.second;
2989 Sema::GlobalMethodPool::iterator F = SemaRef.MethodPool.find(S);
2990 ASTMethodPoolTrait::data_type Data = {
2995 if (F != SemaRef.MethodPool.end()) {
2996 Data.Instance = F->second.first;
2997 Data.Factory = F->second.second;
2999 // Only write this selector if it's not in an existing AST or something
3001 if (Chain && ID < FirstSelectorID) {
3002 // Selector already exists. Did it change?
3003 bool changed = false;
3004 for (ObjCMethodList *M = &Data.Instance;
3005 !changed && M && M->getMethod(); M = M->getNext()) {
3006 if (!M->getMethod()->isFromASTFile())
3009 for (ObjCMethodList *M = &Data.Factory; !changed && M && M->getMethod();
3011 if (!M->getMethod()->isFromASTFile())
3016 } else if (Data.Instance.getMethod() || Data.Factory.getMethod()) {
3017 // A new method pool entry.
3020 Generator.insert(S, Data, Trait);
3023 // Create the on-disk hash table in a buffer.
3024 SmallString<4096> MethodPool;
3025 uint32_t BucketOffset;
3027 using namespace llvm::support;
3028 ASTMethodPoolTrait Trait(*this);
3029 llvm::raw_svector_ostream Out(MethodPool);
3030 // Make sure that no bucket is at offset 0
3031 endian::Writer<little>(Out).write<uint32_t>(0);
3032 BucketOffset = Generator.Emit(Out, Trait);
3035 // Create a blob abbreviation
3036 auto *Abbrev = new BitCodeAbbrev();
3037 Abbrev->Add(BitCodeAbbrevOp(METHOD_POOL));
3038 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
3039 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
3040 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
3041 unsigned MethodPoolAbbrev = Stream.EmitAbbrev(Abbrev);
3043 // Write the method pool
3045 RecordData::value_type Record[] = {METHOD_POOL, BucketOffset,
3047 Stream.EmitRecordWithBlob(MethodPoolAbbrev, Record, MethodPool);
3050 // Create a blob abbreviation for the selector table offsets.
3051 Abbrev = new BitCodeAbbrev();
3052 Abbrev->Add(BitCodeAbbrevOp(SELECTOR_OFFSETS));
3053 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // size
3054 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // first ID
3055 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
3056 unsigned SelectorOffsetAbbrev = Stream.EmitAbbrev(Abbrev);
3058 // Write the selector offsets table.
3060 RecordData::value_type Record[] = {
3061 SELECTOR_OFFSETS, SelectorOffsets.size(),
3062 FirstSelectorID - NUM_PREDEF_SELECTOR_IDS};
3063 Stream.EmitRecordWithBlob(SelectorOffsetAbbrev, Record,
3064 bytes(SelectorOffsets));
3069 /// \brief Write the selectors referenced in @selector expression into AST file.
3070 void ASTWriter::WriteReferencedSelectorsPool(Sema &SemaRef) {
3071 using namespace llvm;
3072 if (SemaRef.ReferencedSelectors.empty())
3077 // Note: this writes out all references even for a dependent AST. But it is
3078 // very tricky to fix, and given that @selector shouldn't really appear in
3079 // headers, probably not worth it. It's not a correctness issue.
3080 for (auto &SelectorAndLocation : SemaRef.ReferencedSelectors) {
3081 Selector Sel = SelectorAndLocation.first;
3082 SourceLocation Loc = SelectorAndLocation.second;
3083 AddSelectorRef(Sel, Record);
3084 AddSourceLocation(Loc, Record);
3086 Stream.EmitRecord(REFERENCED_SELECTOR_POOL, Record);
3089 //===----------------------------------------------------------------------===//
3090 // Identifier Table Serialization
3091 //===----------------------------------------------------------------------===//
3093 /// Determine the declaration that should be put into the name lookup table to
3094 /// represent the given declaration in this module. This is usually D itself,
3095 /// but if D was imported and merged into a local declaration, we want the most
3096 /// recent local declaration instead. The chosen declaration will be the most
3097 /// recent declaration in any module that imports this one.
3098 static NamedDecl *getDeclForLocalLookup(const LangOptions &LangOpts,
3100 if (!LangOpts.Modules || !D->isFromASTFile())
3103 if (Decl *Redecl = D->getPreviousDecl()) {
3104 // For Redeclarable decls, a prior declaration might be local.
3105 for (; Redecl; Redecl = Redecl->getPreviousDecl()) {
3106 if (!Redecl->isFromASTFile())
3107 return cast<NamedDecl>(Redecl);
3108 // If we find a decl from a (chained-)PCH stop since we won't find a
3110 if (D->getOwningModuleID() == 0)
3113 } else if (Decl *First = D->getCanonicalDecl()) {
3114 // For Mergeable decls, the first decl might be local.
3115 if (!First->isFromASTFile())
3116 return cast<NamedDecl>(First);
3119 // All declarations are imported. Our most recent declaration will also be
3120 // the most recent one in anyone who imports us.
3125 class ASTIdentifierTableTrait {
3128 IdentifierResolver &IdResolver;
3131 ASTWriter::RecordData *InterestingIdentifierOffsets;
3133 /// \brief Determines whether this is an "interesting" identifier that needs a
3134 /// full IdentifierInfo structure written into the hash table. Notably, this
3135 /// doesn't check whether the name has macros defined; use PublicMacroIterator
3137 bool isInterestingIdentifier(const IdentifierInfo *II, uint64_t MacroOffset) {
3140 (IsModule ? II->hasRevertedBuiltin() : II->getObjCOrBuiltinID()) ||
3141 II->hasRevertedTokenIDToIdentifier() ||
3142 (NeedDecls && II->getFETokenInfo<void>()))
3149 typedef IdentifierInfo* key_type;
3150 typedef key_type key_type_ref;
3152 typedef IdentID data_type;
3153 typedef data_type data_type_ref;
3155 typedef unsigned hash_value_type;
3156 typedef unsigned offset_type;
3158 ASTIdentifierTableTrait(ASTWriter &Writer, Preprocessor &PP,
3159 IdentifierResolver &IdResolver, bool IsModule,
3160 ASTWriter::RecordData *InterestingIdentifierOffsets)
3161 : Writer(Writer), PP(PP), IdResolver(IdResolver), IsModule(IsModule),
3162 NeedDecls(!IsModule || !Writer.getLangOpts().CPlusPlus),
3163 InterestingIdentifierOffsets(InterestingIdentifierOffsets) {}
3165 static hash_value_type ComputeHash(const IdentifierInfo* II) {
3166 return llvm::HashString(II->getName());
3169 bool isInterestingIdentifier(const IdentifierInfo *II) {
3170 auto MacroOffset = Writer.getMacroDirectivesOffset(II);
3171 return isInterestingIdentifier(II, MacroOffset);
3173 bool isInterestingNonMacroIdentifier(const IdentifierInfo *II) {
3174 return isInterestingIdentifier(II, 0);
3177 std::pair<unsigned,unsigned>
3178 EmitKeyDataLength(raw_ostream& Out, IdentifierInfo* II, IdentID ID) {
3179 unsigned KeyLen = II->getLength() + 1;
3180 unsigned DataLen = 4; // 4 bytes for the persistent ID << 1
3181 auto MacroOffset = Writer.getMacroDirectivesOffset(II);
3182 if (isInterestingIdentifier(II, MacroOffset)) {
3183 DataLen += 2; // 2 bytes for builtin ID
3184 DataLen += 2; // 2 bytes for flags
3186 DataLen += 4; // MacroDirectives offset.
3189 for (IdentifierResolver::iterator D = IdResolver.begin(II),
3190 DEnd = IdResolver.end();
3195 using namespace llvm::support;
3196 endian::Writer<little> LE(Out);
3198 assert((uint16_t)DataLen == DataLen && (uint16_t)KeyLen == KeyLen);
3199 LE.write<uint16_t>(DataLen);
3200 // We emit the key length after the data length so that every
3201 // string is preceded by a 16-bit length. This matches the PTH
3202 // format for storing identifiers.
3203 LE.write<uint16_t>(KeyLen);
3204 return std::make_pair(KeyLen, DataLen);
3207 void EmitKey(raw_ostream& Out, const IdentifierInfo* II,
3209 // Record the location of the key data. This is used when generating
3210 // the mapping from persistent IDs to strings.
3211 Writer.SetIdentifierOffset(II, Out.tell());
3213 // Emit the offset of the key/data length information to the interesting
3214 // identifiers table if necessary.
3215 if (InterestingIdentifierOffsets && isInterestingIdentifier(II))
3216 InterestingIdentifierOffsets->push_back(Out.tell() - 4);
3218 Out.write(II->getNameStart(), KeyLen);
3221 void EmitData(raw_ostream& Out, IdentifierInfo* II,
3222 IdentID ID, unsigned) {
3223 using namespace llvm::support;
3224 endian::Writer<little> LE(Out);
3226 auto MacroOffset = Writer.getMacroDirectivesOffset(II);
3227 if (!isInterestingIdentifier(II, MacroOffset)) {
3228 LE.write<uint32_t>(ID << 1);
3232 LE.write<uint32_t>((ID << 1) | 0x01);
3233 uint32_t Bits = (uint32_t)II->getObjCOrBuiltinID();
3234 assert((Bits & 0xffff) == Bits && "ObjCOrBuiltinID too big for ASTReader.");
3235 LE.write<uint16_t>(Bits);
3237 bool HadMacroDefinition = MacroOffset != 0;
3238 Bits = (Bits << 1) | unsigned(HadMacroDefinition);
3239 Bits = (Bits << 1) | unsigned(II->isExtensionToken());
3240 Bits = (Bits << 1) | unsigned(II->isPoisoned());
3241 Bits = (Bits << 1) | unsigned(II->hasRevertedBuiltin());
3242 Bits = (Bits << 1) | unsigned(II->hasRevertedTokenIDToIdentifier());
3243 Bits = (Bits << 1) | unsigned(II->isCPlusPlusOperatorKeyword());
3244 LE.write<uint16_t>(Bits);
3246 if (HadMacroDefinition)
3247 LE.write<uint32_t>(MacroOffset);
3250 // Emit the declaration IDs in reverse order, because the
3251 // IdentifierResolver provides the declarations as they would be
3252 // visible (e.g., the function "stat" would come before the struct
3253 // "stat"), but the ASTReader adds declarations to the end of the list
3254 // (so we need to see the struct "stat" before the function "stat").
3255 // Only emit declarations that aren't from a chained PCH, though.
3256 SmallVector<NamedDecl *, 16> Decls(IdResolver.begin(II),
3258 for (SmallVectorImpl<NamedDecl *>::reverse_iterator D = Decls.rbegin(),
3259 DEnd = Decls.rend();
3262 Writer.getDeclID(getDeclForLocalLookup(PP.getLangOpts(), *D)));
3266 } // end anonymous namespace
3268 /// \brief Write the identifier table into the AST file.
3270 /// The identifier table consists of a blob containing string data
3271 /// (the actual identifiers themselves) and a separate "offsets" index
3272 /// that maps identifier IDs to locations within the blob.
3273 void ASTWriter::WriteIdentifierTable(Preprocessor &PP,
3274 IdentifierResolver &IdResolver,
3276 using namespace llvm;
3278 RecordData InterestingIdents;
3280 // Create and write out the blob that contains the identifier
3283 llvm::OnDiskChainedHashTableGenerator<ASTIdentifierTableTrait> Generator;
3284 ASTIdentifierTableTrait Trait(
3285 *this, PP, IdResolver, IsModule,
3286 (getLangOpts().CPlusPlus && IsModule) ? &InterestingIdents : nullptr);
3288 // Look for any identifiers that were named while processing the
3289 // headers, but are otherwise not needed. We add these to the hash
3290 // table to enable checking of the predefines buffer in the case
3291 // where the user adds new macro definitions when building the AST
3293 SmallVector<const IdentifierInfo *, 128> IIs;
3294 for (const auto &ID : PP.getIdentifierTable())
3295 IIs.push_back(ID.second);
3296 // Sort the identifiers lexicographically before getting them references so
3297 // that their order is stable.
3298 std::sort(IIs.begin(), IIs.end(), llvm::less_ptr<IdentifierInfo>());
3299 for (const IdentifierInfo *II : IIs)
3300 if (Trait.isInterestingNonMacroIdentifier(II))
3301 getIdentifierRef(II);
3303 // Create the on-disk hash table representation. We only store offsets
3304 // for identifiers that appear here for the first time.
3305 IdentifierOffsets.resize(NextIdentID - FirstIdentID);
3306 for (auto IdentIDPair : IdentifierIDs) {
3307 auto *II = const_cast<IdentifierInfo *>(IdentIDPair.first);
3308 IdentID ID = IdentIDPair.second;
3309 assert(II && "NULL identifier in identifier table");
3310 if (!Chain || !II->isFromAST() || II->hasChangedSinceDeserialization())
3311 Generator.insert(II, ID, Trait);
3314 // Create the on-disk hash table in a buffer.
3315 SmallString<4096> IdentifierTable;
3316 uint32_t BucketOffset;
3318 using namespace llvm::support;
3319 llvm::raw_svector_ostream Out(IdentifierTable);
3320 // Make sure that no bucket is at offset 0
3321 endian::Writer<little>(Out).write<uint32_t>(0);
3322 BucketOffset = Generator.Emit(Out, Trait);
3325 // Create a blob abbreviation
3326 auto *Abbrev = new BitCodeAbbrev();
3327 Abbrev->Add(BitCodeAbbrevOp(IDENTIFIER_TABLE));
3328 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
3329 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
3330 unsigned IDTableAbbrev = Stream.EmitAbbrev(Abbrev);
3332 // Write the identifier table
3333 RecordData::value_type Record[] = {IDENTIFIER_TABLE, BucketOffset};
3334 Stream.EmitRecordWithBlob(IDTableAbbrev, Record, IdentifierTable);
3337 // Write the offsets table for identifier IDs.
3338 auto *Abbrev = new BitCodeAbbrev();
3339 Abbrev->Add(BitCodeAbbrevOp(IDENTIFIER_OFFSET));
3340 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // # of identifiers
3341 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // first ID
3342 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
3343 unsigned IdentifierOffsetAbbrev = Stream.EmitAbbrev(Abbrev);
3346 for (unsigned I = 0, N = IdentifierOffsets.size(); I != N; ++I)
3347 assert(IdentifierOffsets[I] && "Missing identifier offset?");
3350 RecordData::value_type Record[] = {IDENTIFIER_OFFSET,
3351 IdentifierOffsets.size(),
3352 FirstIdentID - NUM_PREDEF_IDENT_IDS};
3353 Stream.EmitRecordWithBlob(IdentifierOffsetAbbrev, Record,
3354 bytes(IdentifierOffsets));
3356 // In C++, write the list of interesting identifiers (those that are
3357 // defined as macros, poisoned, or similar unusual things).
3358 if (!InterestingIdents.empty())
3359 Stream.EmitRecord(INTERESTING_IDENTIFIERS, InterestingIdents);
3362 //===----------------------------------------------------------------------===//
3363 // DeclContext's Name Lookup Table Serialization
3364 //===----------------------------------------------------------------------===//
3367 // Trait used for the on-disk hash table used in the method pool.
3368 class ASTDeclContextNameLookupTrait {
3370 llvm::SmallVector<DeclID, 64> DeclIDs;
3373 typedef DeclarationNameKey key_type;
3374 typedef key_type key_type_ref;
3376 /// A start and end index into DeclIDs, representing a sequence of decls.
3377 typedef std::pair<unsigned, unsigned> data_type;
3378 typedef const data_type& data_type_ref;
3380 typedef unsigned hash_value_type;
3381 typedef unsigned offset_type;
3383 explicit ASTDeclContextNameLookupTrait(ASTWriter &Writer) : Writer(Writer) { }
3385 template<typename Coll>
3386 data_type getData(const Coll &Decls) {
3387 unsigned Start = DeclIDs.size();
3388 for (NamedDecl *D : Decls) {
3390 Writer.GetDeclRef(getDeclForLocalLookup(Writer.getLangOpts(), D)));
3392 return std::make_pair(Start, DeclIDs.size());
3395 data_type ImportData(const reader::ASTDeclContextNameLookupTrait::data_type &FromReader) {
3396 unsigned Start = DeclIDs.size();
3397 for (auto ID : FromReader)
3398 DeclIDs.push_back(ID);
3399 return std::make_pair(Start, DeclIDs.size());
3402 static bool EqualKey(key_type_ref a, key_type_ref b) {
3406 hash_value_type ComputeHash(DeclarationNameKey Name) {
3407 return Name.getHash();
3410 void EmitFileRef(raw_ostream &Out, ModuleFile *F) const {
3411 assert(Writer.hasChain() &&
3412 "have reference to loaded module file but no chain?");
3414 using namespace llvm::support;
3415 endian::Writer<little>(Out)
3416 .write<uint32_t>(Writer.getChain()->getModuleFileID(F));
3419 std::pair<unsigned, unsigned> EmitKeyDataLength(raw_ostream &Out,
3420 DeclarationNameKey Name,
3421 data_type_ref Lookup) {
3422 using namespace llvm::support;
3423 endian::Writer<little> LE(Out);
3424 unsigned KeyLen = 1;
3425 switch (Name.getKind()) {
3426 case DeclarationName::Identifier:
3427 case DeclarationName::ObjCZeroArgSelector:
3428 case DeclarationName::ObjCOneArgSelector:
3429 case DeclarationName::ObjCMultiArgSelector:
3430 case DeclarationName::CXXLiteralOperatorName:
3433 case DeclarationName::CXXOperatorName:
3436 case DeclarationName::CXXConstructorName:
3437 case DeclarationName::CXXDestructorName:
3438 case DeclarationName::CXXConversionFunctionName:
3439 case DeclarationName::CXXUsingDirective:
3442 LE.write<uint16_t>(KeyLen);
3444 // 4 bytes for each DeclID.
3445 unsigned DataLen = 4 * (Lookup.second - Lookup.first);
3446 assert(uint16_t(DataLen) == DataLen &&
3447 "too many decls for serialized lookup result");
3448 LE.write<uint16_t>(DataLen);
3450 return std::make_pair(KeyLen, DataLen);
3453 void EmitKey(raw_ostream &Out, DeclarationNameKey Name, unsigned) {
3454 using namespace llvm::support;
3455 endian::Writer<little> LE(Out);
3456 LE.write<uint8_t>(Name.getKind());
3457 switch (Name.getKind()) {
3458 case DeclarationName::Identifier:
3459 case DeclarationName::CXXLiteralOperatorName:
3460 LE.write<uint32_t>(Writer.getIdentifierRef(Name.getIdentifier()));
3462 case DeclarationName::ObjCZeroArgSelector:
3463 case DeclarationName::ObjCOneArgSelector:
3464 case DeclarationName::ObjCMultiArgSelector:
3465 LE.write<uint32_t>(Writer.getSelectorRef(Name.getSelector()));
3467 case DeclarationName::CXXOperatorName:
3468 assert(Name.getOperatorKind() < NUM_OVERLOADED_OPERATORS &&
3469 "Invalid operator?");
3470 LE.write<uint8_t>(Name.getOperatorKind());
3472 case DeclarationName::CXXConstructorName:
3473 case DeclarationName::CXXDestructorName:
3474 case DeclarationName::CXXConversionFunctionName:
3475 case DeclarationName::CXXUsingDirective:
3479 llvm_unreachable("Invalid name kind?");
3482 void EmitData(raw_ostream &Out, key_type_ref, data_type Lookup,
3484 using namespace llvm::support;
3485 endian::Writer<little> LE(Out);
3486 uint64_t Start = Out.tell(); (void)Start;
3487 for (unsigned I = Lookup.first, N = Lookup.second; I != N; ++I)
3488 LE.write<uint32_t>(DeclIDs[I]);
3489 assert(Out.tell() - Start == DataLen && "Data length is wrong");
3492 } // end anonymous namespace
3494 bool ASTWriter::isLookupResultExternal(StoredDeclsList &Result,
3496 return Result.hasExternalDecls() && DC->NeedToReconcileExternalVisibleStorage;
3499 bool ASTWriter::isLookupResultEntirelyExternal(StoredDeclsList &Result,
3501 for (auto *D : Result.getLookupResult())
3502 if (!getDeclForLocalLookup(getLangOpts(), D)->isFromASTFile())
3509 ASTWriter::GenerateNameLookupTable(const DeclContext *ConstDC,
3510 llvm::SmallVectorImpl<char> &LookupTable) {
3511 assert(!ConstDC->HasLazyLocalLexicalLookups &&
3512 !ConstDC->HasLazyExternalLexicalLookups &&
3513 "must call buildLookups first");
3515 // FIXME: We need to build the lookups table, which is logically const.
3516 auto *DC = const_cast<DeclContext*>(ConstDC);
3517 assert(DC == DC->getPrimaryContext() && "only primary DC has lookup table");
3519 // Create the on-disk hash table representation.
3520 MultiOnDiskHashTableGenerator<reader::ASTDeclContextNameLookupTrait,
3521 ASTDeclContextNameLookupTrait> Generator;
3522 ASTDeclContextNameLookupTrait Trait(*this);
3524 // The first step is to collect the declaration names which we need to
3525 // serialize into the name lookup table, and to collect them in a stable
3527 SmallVector<DeclarationName, 16> Names;
3529 // We also build up small sets of the constructor and conversion function
3530 // names which are visible.
3531 llvm::SmallSet<DeclarationName, 8> ConstructorNameSet, ConversionNameSet;
3533 for (auto &Lookup : *DC->buildLookup()) {
3534 auto &Name = Lookup.first;
3535 auto &Result = Lookup.second;
3537 // If there are no local declarations in our lookup result, we
3538 // don't need to write an entry for the name at all. If we can't
3539 // write out a lookup set without performing more deserialization,
3540 // just skip this entry.
3541 if (isLookupResultExternal(Result, DC) &&
3542 isLookupResultEntirelyExternal(Result, DC))
3545 // We also skip empty results. If any of the results could be external and
3546 // the currently available results are empty, then all of the results are
3547 // external and we skip it above. So the only way we get here with an empty
3548 // results is when no results could have been external *and* we have
3549 // external results.
3551 // FIXME: While we might want to start emitting on-disk entries for negative
3552 // lookups into a decl context as an optimization, today we *have* to skip
3553 // them because there are names with empty lookup results in decl contexts
3554 // which we can't emit in any stable ordering: we lookup constructors and
3555 // conversion functions in the enclosing namespace scope creating empty
3556 // results for them. This in almost certainly a bug in Clang's name lookup,
3557 // but that is likely to be hard or impossible to fix and so we tolerate it
3558 // here by omitting lookups with empty results.
3559 if (Lookup.second.getLookupResult().empty())
3562 switch (Lookup.first.getNameKind()) {
3564 Names.push_back(Lookup.first);
3567 case DeclarationName::CXXConstructorName:
3568 assert(isa<CXXRecordDecl>(DC) &&
3569 "Cannot have a constructor name outside of a class!");
3570 ConstructorNameSet.insert(Name);
3573 case DeclarationName::CXXConversionFunctionName:
3574 assert(isa<CXXRecordDecl>(DC) &&
3575 "Cannot have a conversion function name outside of a class!");
3576 ConversionNameSet.insert(Name);
3581 // Sort the names into a stable order.
3582 std::sort(Names.begin(), Names.end());
3584 if (auto *D = dyn_cast<CXXRecordDecl>(DC)) {
3585 // We need to establish an ordering of constructor and conversion function
3586 // names, and they don't have an intrinsic ordering.
3588 // First we try the easy case by forming the current context's constructor
3589 // name and adding that name first. This is a very useful optimization to
3590 // avoid walking the lexical declarations in many cases, and it also
3591 // handles the only case where a constructor name can come from some other
3592 // lexical context -- when that name is an implicit constructor merged from
3593 // another declaration in the redecl chain. Any non-implicit constructor or
3594 // conversion function which doesn't occur in all the lexical contexts
3595 // would be an ODR violation.
3596 auto ImplicitCtorName = Context->DeclarationNames.getCXXConstructorName(
3597 Context->getCanonicalType(Context->getRecordType(D)));
3598 if (ConstructorNameSet.erase(ImplicitCtorName))
3599 Names.push_back(ImplicitCtorName);
3601 // If we still have constructors or conversion functions, we walk all the
3602 // names in the decl and add the constructors and conversion functions
3603 // which are visible in the order they lexically occur within the context.
3604 if (!ConstructorNameSet.empty() || !ConversionNameSet.empty())
3605 for (Decl *ChildD : cast<CXXRecordDecl>(DC)->decls())
3606 if (auto *ChildND = dyn_cast<NamedDecl>(ChildD)) {
3607 auto Name = ChildND->getDeclName();
3608 switch (Name.getNameKind()) {
3612 case DeclarationName::CXXConstructorName:
3613 if (ConstructorNameSet.erase(Name))
3614 Names.push_back(Name);
3617 case DeclarationName::CXXConversionFunctionName:
3618 if (ConversionNameSet.erase(Name))
3619 Names.push_back(Name);
3623 if (ConstructorNameSet.empty() && ConversionNameSet.empty())
3627 assert(ConstructorNameSet.empty() && "Failed to find all of the visible "
3628 "constructors by walking all the "
3629 "lexical members of the context.");
3630 assert(ConversionNameSet.empty() && "Failed to find all of the visible "
3631 "conversion functions by walking all "
3632 "the lexical members of the context.");
3635 // Next we need to do a lookup with each name into this decl context to fully
3636 // populate any results from external sources. We don't actually use the
3637 // results of these lookups because we only want to use the results after all
3638 // results have been loaded and the pointers into them will be stable.
3639 for (auto &Name : Names)
3642 // Now we need to insert the results for each name into the hash table. For
3643 // constructor names and conversion function names, we actually need to merge
3644 // all of the results for them into one list of results each and insert
3646 SmallVector<NamedDecl *, 8> ConstructorDecls;
3647 SmallVector<NamedDecl *, 8> ConversionDecls;
3649 // Now loop over the names, either inserting them or appending for the two
3651 for (auto &Name : Names) {
3652 DeclContext::lookup_result Result = DC->noload_lookup(Name);
3654 switch (Name.getNameKind()) {
3656 Generator.insert(Name, Trait.getData(Result), Trait);
3659 case DeclarationName::CXXConstructorName:
3660 ConstructorDecls.append(Result.begin(), Result.end());
3663 case DeclarationName::CXXConversionFunctionName:
3664 ConversionDecls.append(Result.begin(), Result.end());
3669 // Handle our two special cases if we ended up having any. We arbitrarily use
3670 // the first declaration's name here because the name itself isn't part of
3671 // the key, only the kind of name is used.
3672 if (!ConstructorDecls.empty())
3673 Generator.insert(ConstructorDecls.front()->getDeclName(),
3674 Trait.getData(ConstructorDecls), Trait);
3675 if (!ConversionDecls.empty())
3676 Generator.insert(ConversionDecls.front()->getDeclName(),
3677 Trait.getData(ConversionDecls), Trait);
3679 // Create the on-disk hash table. Also emit the existing imported and
3680 // merged table if there is one.
3681 auto *Lookups = Chain ? Chain->getLoadedLookupTables(DC) : nullptr;
3682 Generator.emit(LookupTable, Trait, Lookups ? &Lookups->Table : nullptr);
3685 /// \brief Write the block containing all of the declaration IDs
3686 /// visible from the given DeclContext.
3688 /// \returns the offset of the DECL_CONTEXT_VISIBLE block within the
3689 /// bitstream, or 0 if no block was written.
3690 uint64_t ASTWriter::WriteDeclContextVisibleBlock(ASTContext &Context,
3692 // If we imported a key declaration of this namespace, write the visible
3693 // lookup results as an update record for it rather than including them
3694 // on this declaration. We will only look at key declarations on reload.
3695 if (isa<NamespaceDecl>(DC) && Chain &&
3696 Chain->getKeyDeclaration(cast<Decl>(DC))->isFromASTFile()) {
3697 // Only do this once, for the first local declaration of the namespace.
3698 for (auto *Prev = cast<NamespaceDecl>(DC)->getPreviousDecl(); Prev;
3699 Prev = Prev->getPreviousDecl())
3700 if (!Prev->isFromASTFile())
3703 // Note that we need to emit an update record for the primary context.
3704 UpdatedDeclContexts.insert(DC->getPrimaryContext());
3706 // Make sure all visible decls are written. They will be recorded later. We
3707 // do this using a side data structure so we can sort the names into
3708 // a deterministic order.
3709 StoredDeclsMap *Map = DC->getPrimaryContext()->buildLookup();
3710 SmallVector<std::pair<DeclarationName, DeclContext::lookup_result>, 16>
3713 LookupResults.reserve(Map->size());
3714 for (auto &Entry : *Map)
3715 LookupResults.push_back(
3716 std::make_pair(Entry.first, Entry.second.getLookupResult()));
3719 std::sort(LookupResults.begin(), LookupResults.end(), llvm::less_first());
3720 for (auto &NameAndResult : LookupResults) {
3721 DeclarationName Name = NameAndResult.first;
3722 DeclContext::lookup_result Result = NameAndResult.second;
3723 if (Name.getNameKind() == DeclarationName::CXXConstructorName ||
3724 Name.getNameKind() == DeclarationName::CXXConversionFunctionName) {
3725 // We have to work around a name lookup bug here where negative lookup
3726 // results for these names get cached in namespace lookup tables (these
3727 // names should never be looked up in a namespace).
3728 assert(Result.empty() && "Cannot have a constructor or conversion "
3729 "function name in a namespace!");
3733 for (NamedDecl *ND : Result)
3734 if (!ND->isFromASTFile())
3741 if (DC->getPrimaryContext() != DC)
3744 // Skip contexts which don't support name lookup.
3745 if (!DC->isLookupContext())
3748 // If not in C++, we perform name lookup for the translation unit via the
3749 // IdentifierInfo chains, don't bother to build a visible-declarations table.
3750 if (DC->isTranslationUnit() && !Context.getLangOpts().CPlusPlus)
3753 // Serialize the contents of the mapping used for lookup. Note that,
3754 // although we have two very different code paths, the serialized
3755 // representation is the same for both cases: a declaration name,
3756 // followed by a size, followed by references to the visible
3757 // declarations that have that name.
3758 uint64_t Offset = Stream.GetCurrentBitNo();
3759 StoredDeclsMap *Map = DC->buildLookup();
3760 if (!Map || Map->empty())
3763 // Create the on-disk hash table in a buffer.
3764 SmallString<4096> LookupTable;
3765 GenerateNameLookupTable(DC, LookupTable);
3767 // Write the lookup table
3768 RecordData::value_type Record[] = {DECL_CONTEXT_VISIBLE};
3769 Stream.EmitRecordWithBlob(DeclContextVisibleLookupAbbrev, Record,
3771 ++NumVisibleDeclContexts;
3775 /// \brief Write an UPDATE_VISIBLE block for the given context.
3777 /// UPDATE_VISIBLE blocks contain the declarations that are added to an existing
3778 /// DeclContext in a dependent AST file. As such, they only exist for the TU
3779 /// (in C++), for namespaces, and for classes with forward-declared unscoped
3780 /// enumeration members (in C++11).
3781 void ASTWriter::WriteDeclContextVisibleUpdate(const DeclContext *DC) {
3782 StoredDeclsMap *Map = DC->getLookupPtr();
3783 if (!Map || Map->empty())
3786 // Create the on-disk hash table in a buffer.
3787 SmallString<4096> LookupTable;
3788 GenerateNameLookupTable(DC, LookupTable);
3790 // If we're updating a namespace, select a key declaration as the key for the
3791 // update record; those are the only ones that will be checked on reload.
3792 if (isa<NamespaceDecl>(DC))
3793 DC = cast<DeclContext>(Chain->getKeyDeclaration(cast<Decl>(DC)));
3795 // Write the lookup table
3796 RecordData::value_type Record[] = {UPDATE_VISIBLE, getDeclID(cast<Decl>(DC))};
3797 Stream.EmitRecordWithBlob(UpdateVisibleAbbrev, Record, LookupTable);
3800 /// \brief Write an FP_PRAGMA_OPTIONS block for the given FPOptions.
3801 void ASTWriter::WriteFPPragmaOptions(const FPOptions &Opts) {
3802 RecordData::value_type Record[] = {Opts.fp_contract};
3803 Stream.EmitRecord(FP_PRAGMA_OPTIONS, Record);
3806 /// \brief Write an OPENCL_EXTENSIONS block for the given OpenCLOptions.
3807 void ASTWriter::WriteOpenCLExtensions(Sema &SemaRef) {
3808 if (!SemaRef.Context.getLangOpts().OpenCL)
3811 const OpenCLOptions &Opts = SemaRef.getOpenCLOptions();
3813 #define OPENCLEXT(nm) Record.push_back(Opts.nm);
3814 #include "clang/Basic/OpenCLExtensions.def"
3815 Stream.EmitRecord(OPENCL_EXTENSIONS, Record);
3818 void ASTWriter::WriteObjCCategories() {
3819 SmallVector<ObjCCategoriesInfo, 2> CategoriesMap;
3820 RecordData Categories;
3822 for (unsigned I = 0, N = ObjCClassesWithCategories.size(); I != N; ++I) {
3824 unsigned StartIndex = Categories.size();
3826 ObjCInterfaceDecl *Class = ObjCClassesWithCategories[I];
3828 // Allocate space for the size.
3829 Categories.push_back(0);
3831 // Add the categories.
3832 for (ObjCInterfaceDecl::known_categories_iterator
3833 Cat = Class->known_categories_begin(),
3834 CatEnd = Class->known_categories_end();
3835 Cat != CatEnd; ++Cat, ++Size) {
3836 assert(getDeclID(*Cat) != 0 && "Bogus category");
3837 AddDeclRef(*Cat, Categories);
3841 Categories[StartIndex] = Size;
3843 // Record this interface -> category map.
3844 ObjCCategoriesInfo CatInfo = { getDeclID(Class), StartIndex };
3845 CategoriesMap.push_back(CatInfo);
3848 // Sort the categories map by the definition ID, since the reader will be
3849 // performing binary searches on this information.
3850 llvm::array_pod_sort(CategoriesMap.begin(), CategoriesMap.end());
3852 // Emit the categories map.
3853 using namespace llvm;
3855 auto *Abbrev = new BitCodeAbbrev();
3856 Abbrev->Add(BitCodeAbbrevOp(OBJC_CATEGORIES_MAP));
3857 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // # of entries
3858 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
3859 unsigned AbbrevID = Stream.EmitAbbrev(Abbrev);
3861 RecordData::value_type Record[] = {OBJC_CATEGORIES_MAP, CategoriesMap.size()};
3862 Stream.EmitRecordWithBlob(AbbrevID, Record,
3863 reinterpret_cast<char *>(CategoriesMap.data()),
3864 CategoriesMap.size() * sizeof(ObjCCategoriesInfo));
3866 // Emit the category lists.
3867 Stream.EmitRecord(OBJC_CATEGORIES, Categories);
3870 void ASTWriter::WriteLateParsedTemplates(Sema &SemaRef) {
3871 Sema::LateParsedTemplateMapT &LPTMap = SemaRef.LateParsedTemplateMap;
3877 for (auto LPTMapEntry : LPTMap) {
3878 const FunctionDecl *FD = LPTMapEntry.first;
3879 LateParsedTemplate *LPT = LPTMapEntry.second;
3880 AddDeclRef(FD, Record);
3881 AddDeclRef(LPT->D, Record);
3882 Record.push_back(LPT->Toks.size());
3884 for (const auto &Tok : LPT->Toks) {
3885 AddToken(Tok, Record);
3888 Stream.EmitRecord(LATE_PARSED_TEMPLATE, Record);
3891 /// \brief Write the state of 'pragma clang optimize' at the end of the module.
3892 void ASTWriter::WriteOptimizePragmaOptions(Sema &SemaRef) {
3894 SourceLocation PragmaLoc = SemaRef.getOptimizeOffPragmaLocation();
3895 AddSourceLocation(PragmaLoc, Record);
3896 Stream.EmitRecord(OPTIMIZE_PRAGMA_OPTIONS, Record);
3899 void ASTWriter::WriteModuleFileExtension(Sema &SemaRef,
3900 ModuleFileExtensionWriter &Writer) {
3901 // Enter the extension block.
3902 Stream.EnterSubblock(EXTENSION_BLOCK_ID, 4);
3904 // Emit the metadata record abbreviation.
3905 auto *Abv = new llvm::BitCodeAbbrev();
3906 Abv->Add(llvm::BitCodeAbbrevOp(EXTENSION_METADATA));
3907 Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::VBR, 6));
3908 Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::VBR, 6));
3909 Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::VBR, 6));
3910 Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::VBR, 6));
3911 Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::Blob));
3912 unsigned Abbrev = Stream.EmitAbbrev(Abv);
3914 // Emit the metadata record.
3916 auto Metadata = Writer.getExtension()->getExtensionMetadata();
3917 Record.push_back(EXTENSION_METADATA);
3918 Record.push_back(Metadata.MajorVersion);
3919 Record.push_back(Metadata.MinorVersion);
3920 Record.push_back(Metadata.BlockName.size());
3921 Record.push_back(Metadata.UserInfo.size());
3922 SmallString<64> Buffer;
3923 Buffer += Metadata.BlockName;
3924 Buffer += Metadata.UserInfo;
3925 Stream.EmitRecordWithBlob(Abbrev, Record, Buffer);
3927 // Emit the contents of the extension block.
3928 Writer.writeExtensionContents(SemaRef, Stream);
3930 // Exit the extension block.
3934 //===----------------------------------------------------------------------===//
3935 // General Serialization Routines
3936 //===----------------------------------------------------------------------===//
3938 /// \brief Write a record containing the given attributes.
3939 void ASTWriter::WriteAttributes(ArrayRef<const Attr*> Attrs,
3940 RecordDataImpl &Record) {
3941 Record.push_back(Attrs.size());
3942 for (const auto *A : Attrs) {
3943 Record.push_back(A->getKind()); // FIXME: stable encoding, target attrs
3944 AddSourceRange(A->getRange(), Record);
3946 #include "clang/Serialization/AttrPCHWrite.inc"
3951 void ASTWriter::AddToken(const Token &Tok, RecordDataImpl &Record) {
3952 AddSourceLocation(Tok.getLocation(), Record);
3953 Record.push_back(Tok.getLength());
3955 // FIXME: When reading literal tokens, reconstruct the literal pointer
3957 AddIdentifierRef(Tok.getIdentifierInfo(), Record);
3958 // FIXME: Should translate token kind to a stable encoding.
3959 Record.push_back(Tok.getKind());
3960 // FIXME: Should translate token flags to a stable encoding.
3961 Record.push_back(Tok.getFlags());
3964 void ASTWriter::AddString(StringRef Str, RecordDataImpl &Record) {
3965 Record.push_back(Str.size());
3966 Record.insert(Record.end(), Str.begin(), Str.end());
3969 bool ASTWriter::PreparePathForOutput(SmallVectorImpl<char> &Path) {
3970 assert(Context && "should have context when outputting path");
3973 cleanPathForOutput(Context->getSourceManager().getFileManager(), Path);
3975 // Remove a prefix to make the path relative, if relevant.
3976 const char *PathBegin = Path.data();
3977 const char *PathPtr =
3978 adjustFilenameForRelocatableAST(PathBegin, BaseDirectory);
3979 if (PathPtr != PathBegin) {
3980 Path.erase(Path.begin(), Path.begin() + (PathPtr - PathBegin));
3987 void ASTWriter::AddPath(StringRef Path, RecordDataImpl &Record) {
3988 SmallString<128> FilePath(Path);
3989 PreparePathForOutput(FilePath);
3990 AddString(FilePath, Record);
3993 void ASTWriter::EmitRecordWithPath(unsigned Abbrev, RecordDataRef Record,
3995 SmallString<128> FilePath(Path);
3996 PreparePathForOutput(FilePath);
3997 Stream.EmitRecordWithBlob(Abbrev, Record, FilePath);
4000 void ASTWriter::AddVersionTuple(const VersionTuple &Version,
4001 RecordDataImpl &Record) {
4002 Record.push_back(Version.getMajor());
4003 if (Optional<unsigned> Minor = Version.getMinor())
4004 Record.push_back(*Minor + 1);
4006 Record.push_back(0);
4007 if (Optional<unsigned> Subminor = Version.getSubminor())
4008 Record.push_back(*Subminor + 1);
4010 Record.push_back(0);
4013 /// \brief Note that the identifier II occurs at the given offset
4014 /// within the identifier table.
4015 void ASTWriter::SetIdentifierOffset(const IdentifierInfo *II, uint32_t Offset) {
4016 IdentID ID = IdentifierIDs[II];
4017 // Only store offsets new to this AST file. Other identifier names are looked
4018 // up earlier in the chain and thus don't need an offset.
4019 if (ID >= FirstIdentID)
4020 IdentifierOffsets[ID - FirstIdentID] = Offset;
4023 /// \brief Note that the selector Sel occurs at the given offset
4024 /// within the method pool/selector table.
4025 void ASTWriter::SetSelectorOffset(Selector Sel, uint32_t Offset) {
4026 unsigned ID = SelectorIDs[Sel];
4027 assert(ID && "Unknown selector");
4028 // Don't record offsets for selectors that are also available in a different
4030 if (ID < FirstSelectorID)
4032 SelectorOffsets[ID - FirstSelectorID] = Offset;
4035 ASTWriter::ASTWriter(
4036 llvm::BitstreamWriter &Stream,
4037 ArrayRef<llvm::IntrusiveRefCntPtr<ModuleFileExtension>> Extensions,
4038 bool IncludeTimestamps)
4039 : Stream(Stream), Context(nullptr), PP(nullptr), Chain(nullptr),
4040 WritingModule(nullptr), IncludeTimestamps(IncludeTimestamps),
4041 WritingAST(false), DoneWritingDeclsAndTypes(false),
4042 ASTHasCompilerErrors(false), FirstDeclID(NUM_PREDEF_DECL_IDS),
4043 NextDeclID(FirstDeclID), FirstTypeID(NUM_PREDEF_TYPE_IDS),
4044 NextTypeID(FirstTypeID), FirstIdentID(NUM_PREDEF_IDENT_IDS),
4045 NextIdentID(FirstIdentID), FirstMacroID(NUM_PREDEF_MACRO_IDS),
4046 NextMacroID(FirstMacroID), FirstSubmoduleID(NUM_PREDEF_SUBMODULE_IDS),
4047 NextSubmoduleID(FirstSubmoduleID),
4048 FirstSelectorID(NUM_PREDEF_SELECTOR_IDS), NextSelectorID(FirstSelectorID),
4049 CollectedStmts(&StmtsToEmit), NumStatements(0), NumMacros(0),
4050 NumLexicalDeclContexts(0), NumVisibleDeclContexts(0),
4051 NextCXXBaseSpecifiersID(1), NextCXXCtorInitializersID(1),
4052 TypeExtQualAbbrev(0), TypeFunctionProtoAbbrev(0), DeclParmVarAbbrev(0),
4053 DeclContextLexicalAbbrev(0), DeclContextVisibleLookupAbbrev(0),
4054 UpdateVisibleAbbrev(0), DeclRecordAbbrev(0), DeclTypedefAbbrev(0),
4055 DeclVarAbbrev(0), DeclFieldAbbrev(0), DeclEnumAbbrev(0),
4056 DeclObjCIvarAbbrev(0), DeclCXXMethodAbbrev(0), DeclRefExprAbbrev(0),
4057 CharacterLiteralAbbrev(0), IntegerLiteralAbbrev(0),
4058 ExprImplicitCastAbbrev(0) {
4059 for (const auto &Ext : Extensions) {
4060 if (auto Writer = Ext->createExtensionWriter(*this))
4061 ModuleFileExtensionWriters.push_back(std::move(Writer));
4065 ASTWriter::~ASTWriter() {
4066 llvm::DeleteContainerSeconds(FileDeclIDs);
4069 const LangOptions &ASTWriter::getLangOpts() const {
4070 assert(WritingAST && "can't determine lang opts when not writing AST");
4071 return Context->getLangOpts();
4074 time_t ASTWriter::getTimestampForOutput(const FileEntry *E) const {
4075 return IncludeTimestamps ? E->getModificationTime() : 0;
4078 uint64_t ASTWriter::WriteAST(Sema &SemaRef, const std::string &OutputFile,
4079 Module *WritingModule, StringRef isysroot,
4083 ASTHasCompilerErrors = hasErrors;
4085 // Emit the file header.
4086 Stream.Emit((unsigned)'C', 8);
4087 Stream.Emit((unsigned)'P', 8);
4088 Stream.Emit((unsigned)'C', 8);
4089 Stream.Emit((unsigned)'H', 8);
4091 WriteBlockInfoBlock();
4093 Context = &SemaRef.Context;
4095 this->WritingModule = WritingModule;
4096 ASTFileSignature Signature =
4097 WriteASTCore(SemaRef, isysroot, OutputFile, WritingModule);
4100 this->WritingModule = nullptr;
4101 this->BaseDirectory.clear();
4107 template<typename Vector>
4108 static void AddLazyVectorDecls(ASTWriter &Writer, Vector &Vec,
4109 ASTWriter::RecordData &Record) {
4110 for (typename Vector::iterator I = Vec.begin(nullptr, true), E = Vec.end();
4112 Writer.AddDeclRef(*I, Record);
4116 uint64_t ASTWriter::WriteASTCore(Sema &SemaRef, StringRef isysroot,
4117 const std::string &OutputFile,
4118 Module *WritingModule) {
4119 using namespace llvm;
4121 bool isModule = WritingModule != nullptr;
4123 // Make sure that the AST reader knows to finalize itself.
4125 Chain->finalizeForWriting();
4127 ASTContext &Context = SemaRef.Context;
4128 Preprocessor &PP = SemaRef.PP;
4130 // Set up predefined declaration IDs.
4131 auto RegisterPredefDecl = [&] (Decl *D, PredefinedDeclIDs ID) {
4133 assert(D->isCanonicalDecl() && "predefined decl is not canonical");
4137 RegisterPredefDecl(Context.getTranslationUnitDecl(),
4138 PREDEF_DECL_TRANSLATION_UNIT_ID);
4139 RegisterPredefDecl(Context.ObjCIdDecl, PREDEF_DECL_OBJC_ID_ID);
4140 RegisterPredefDecl(Context.ObjCSelDecl, PREDEF_DECL_OBJC_SEL_ID);
4141 RegisterPredefDecl(Context.ObjCClassDecl, PREDEF_DECL_OBJC_CLASS_ID);
4142 RegisterPredefDecl(Context.ObjCProtocolClassDecl,
4143 PREDEF_DECL_OBJC_PROTOCOL_ID);
4144 RegisterPredefDecl(Context.Int128Decl, PREDEF_DECL_INT_128_ID);
4145 RegisterPredefDecl(Context.UInt128Decl, PREDEF_DECL_UNSIGNED_INT_128_ID);
4146 RegisterPredefDecl(Context.ObjCInstanceTypeDecl,
4147 PREDEF_DECL_OBJC_INSTANCETYPE_ID);
4148 RegisterPredefDecl(Context.BuiltinVaListDecl, PREDEF_DECL_BUILTIN_VA_LIST_ID);
4149 RegisterPredefDecl(Context.VaListTagDecl, PREDEF_DECL_VA_LIST_TAG);
4150 RegisterPredefDecl(Context.BuiltinMSVaListDecl,
4151 PREDEF_DECL_BUILTIN_MS_VA_LIST_ID);
4152 RegisterPredefDecl(Context.ExternCContext, PREDEF_DECL_EXTERN_C_CONTEXT_ID);
4153 RegisterPredefDecl(Context.MakeIntegerSeqDecl,
4154 PREDEF_DECL_MAKE_INTEGER_SEQ_ID);
4156 // Build a record containing all of the tentative definitions in this file, in
4157 // TentativeDefinitions order. Generally, this record will be empty for
4159 RecordData TentativeDefinitions;
4160 AddLazyVectorDecls(*this, SemaRef.TentativeDefinitions, TentativeDefinitions);
4162 // Build a record containing all of the file scoped decls in this file.
4163 RecordData UnusedFileScopedDecls;
4165 AddLazyVectorDecls(*this, SemaRef.UnusedFileScopedDecls,
4166 UnusedFileScopedDecls);
4168 // Build a record containing all of the delegating constructors we still need
4170 RecordData DelegatingCtorDecls;
4172 AddLazyVectorDecls(*this, SemaRef.DelegatingCtorDecls, DelegatingCtorDecls);
4174 // Write the set of weak, undeclared identifiers. We always write the
4175 // entire table, since later PCH files in a PCH chain are only interested in
4176 // the results at the end of the chain.
4177 RecordData WeakUndeclaredIdentifiers;
4178 for (auto &WeakUndeclaredIdentifier : SemaRef.WeakUndeclaredIdentifiers) {
4179 IdentifierInfo *II = WeakUndeclaredIdentifier.first;
4180 WeakInfo &WI = WeakUndeclaredIdentifier.second;
4181 AddIdentifierRef(II, WeakUndeclaredIdentifiers);
4182 AddIdentifierRef(WI.getAlias(), WeakUndeclaredIdentifiers);
4183 AddSourceLocation(WI.getLocation(), WeakUndeclaredIdentifiers);
4184 WeakUndeclaredIdentifiers.push_back(WI.getUsed());
4187 // Build a record containing all of the ext_vector declarations.
4188 RecordData ExtVectorDecls;
4189 AddLazyVectorDecls(*this, SemaRef.ExtVectorDecls, ExtVectorDecls);
4191 // Build a record containing all of the VTable uses information.
4192 RecordData VTableUses;
4193 if (!SemaRef.VTableUses.empty()) {
4194 for (unsigned I = 0, N = SemaRef.VTableUses.size(); I != N; ++I) {
4195 AddDeclRef(SemaRef.VTableUses[I].first, VTableUses);
4196 AddSourceLocation(SemaRef.VTableUses[I].second, VTableUses);
4197 VTableUses.push_back(SemaRef.VTablesUsed[SemaRef.VTableUses[I].first]);
4201 // Build a record containing all of the UnusedLocalTypedefNameCandidates.
4202 RecordData UnusedLocalTypedefNameCandidates;
4203 for (const TypedefNameDecl *TD : SemaRef.UnusedLocalTypedefNameCandidates)
4204 AddDeclRef(TD, UnusedLocalTypedefNameCandidates);
4206 // Build a record containing all of pending implicit instantiations.
4207 RecordData PendingInstantiations;
4208 for (const auto &I : SemaRef.PendingInstantiations) {
4209 AddDeclRef(I.first, PendingInstantiations);
4210 AddSourceLocation(I.second, PendingInstantiations);
4212 assert(SemaRef.PendingLocalImplicitInstantiations.empty() &&
4213 "There are local ones at end of translation unit!");
4215 // Build a record containing some declaration references.
4216 RecordData SemaDeclRefs;
4217 if (SemaRef.StdNamespace || SemaRef.StdBadAlloc) {
4218 AddDeclRef(SemaRef.getStdNamespace(), SemaDeclRefs);
4219 AddDeclRef(SemaRef.getStdBadAlloc(), SemaDeclRefs);
4222 RecordData CUDASpecialDeclRefs;
4223 if (Context.getcudaConfigureCallDecl()) {
4224 AddDeclRef(Context.getcudaConfigureCallDecl(), CUDASpecialDeclRefs);
4227 // Build a record containing all of the known namespaces.
4228 RecordData KnownNamespaces;
4229 for (const auto &I : SemaRef.KnownNamespaces) {
4231 AddDeclRef(I.first, KnownNamespaces);
4234 // Build a record of all used, undefined objects that require definitions.
4235 RecordData UndefinedButUsed;
4237 SmallVector<std::pair<NamedDecl *, SourceLocation>, 16> Undefined;
4238 SemaRef.getUndefinedButUsed(Undefined);
4239 for (const auto &I : Undefined) {
4240 AddDeclRef(I.first, UndefinedButUsed);
4241 AddSourceLocation(I.second, UndefinedButUsed);
4244 // Build a record containing all delete-expressions that we would like to
4245 // analyze later in AST.
4246 RecordData DeleteExprsToAnalyze;
4248 for (const auto &DeleteExprsInfo :
4249 SemaRef.getMismatchingDeleteExpressions()) {
4250 AddDeclRef(DeleteExprsInfo.first, DeleteExprsToAnalyze);
4251 DeleteExprsToAnalyze.push_back(DeleteExprsInfo.second.size());
4252 for (const auto &DeleteLoc : DeleteExprsInfo.second) {
4253 AddSourceLocation(DeleteLoc.first, DeleteExprsToAnalyze);
4254 DeleteExprsToAnalyze.push_back(DeleteLoc.second);
4258 // Write the control block
4259 uint64_t Signature = WriteControlBlock(PP, Context, isysroot, OutputFile);
4261 // Write the remaining AST contents.
4262 Stream.EnterSubblock(AST_BLOCK_ID, 5);
4264 // This is so that older clang versions, before the introduction
4265 // of the control block, can read and reject the newer PCH format.
4267 RecordData Record = {VERSION_MAJOR};
4268 Stream.EmitRecord(METADATA_OLD_FORMAT, Record);
4271 // Create a lexical update block containing all of the declarations in the
4272 // translation unit that do not come from other AST files.
4273 const TranslationUnitDecl *TU = Context.getTranslationUnitDecl();
4274 SmallVector<uint32_t, 128> NewGlobalKindDeclPairs;
4275 for (const auto *D : TU->noload_decls()) {
4276 if (!D->isFromASTFile()) {
4277 NewGlobalKindDeclPairs.push_back(D->getKind());
4278 NewGlobalKindDeclPairs.push_back(GetDeclRef(D));
4282 auto *Abv = new llvm::BitCodeAbbrev();
4283 Abv->Add(llvm::BitCodeAbbrevOp(TU_UPDATE_LEXICAL));
4284 Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::Blob));
4285 unsigned TuUpdateLexicalAbbrev = Stream.EmitAbbrev(Abv);
4287 RecordData::value_type Record[] = {TU_UPDATE_LEXICAL};
4288 Stream.EmitRecordWithBlob(TuUpdateLexicalAbbrev, Record,
4289 bytes(NewGlobalKindDeclPairs));
4292 // And a visible updates block for the translation unit.
4293 Abv = new llvm::BitCodeAbbrev();
4294 Abv->Add(llvm::BitCodeAbbrevOp(UPDATE_VISIBLE));
4295 Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::VBR, 6));
4296 Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::Blob));
4297 UpdateVisibleAbbrev = Stream.EmitAbbrev(Abv);
4298 WriteDeclContextVisibleUpdate(TU);
4300 // If we have any extern "C" names, write out a visible update for them.
4301 if (Context.ExternCContext)
4302 WriteDeclContextVisibleUpdate(Context.ExternCContext);
4304 // If the translation unit has an anonymous namespace, and we don't already
4305 // have an update block for it, write it as an update block.
4306 // FIXME: Why do we not do this if there's already an update block?
4307 if (NamespaceDecl *NS = TU->getAnonymousNamespace()) {
4308 ASTWriter::UpdateRecord &Record = DeclUpdates[TU];
4310 Record.push_back(DeclUpdate(UPD_CXX_ADDED_ANONYMOUS_NAMESPACE, NS));
4313 // Add update records for all mangling numbers and static local numbers.
4314 // These aren't really update records, but this is a convenient way of
4315 // tagging this rare extra data onto the declarations.
4316 for (const auto &Number : Context.MangleNumbers)
4317 if (!Number.first->isFromASTFile())
4318 DeclUpdates[Number.first].push_back(DeclUpdate(UPD_MANGLING_NUMBER,
4320 for (const auto &Number : Context.StaticLocalNumbers)
4321 if (!Number.first->isFromASTFile())
4322 DeclUpdates[Number.first].push_back(DeclUpdate(UPD_STATIC_LOCAL_NUMBER,
4325 // Make sure visible decls, added to DeclContexts previously loaded from
4326 // an AST file, are registered for serialization.
4327 for (const auto *I : UpdatingVisibleDecls) {
4331 // Make sure all decls associated with an identifier are registered for
4332 // serialization, if we're storing decls with identifiers.
4333 if (!WritingModule || !getLangOpts().CPlusPlus) {
4334 llvm::SmallVector<const IdentifierInfo*, 256> IIs;
4335 for (const auto &ID : PP.getIdentifierTable()) {
4336 const IdentifierInfo *II = ID.second;
4337 if (!Chain || !II->isFromAST() || II->hasChangedSinceDeserialization())
4340 // Sort the identifiers to visit based on their name.
4341 std::sort(IIs.begin(), IIs.end(), llvm::less_ptr<IdentifierInfo>());
4342 for (const IdentifierInfo *II : IIs) {
4343 for (IdentifierResolver::iterator D = SemaRef.IdResolver.begin(II),
4344 DEnd = SemaRef.IdResolver.end();
4351 // Form the record of special types.
4352 RecordData SpecialTypes;
4353 AddTypeRef(Context.getRawCFConstantStringType(), SpecialTypes);
4354 AddTypeRef(Context.getFILEType(), SpecialTypes);
4355 AddTypeRef(Context.getjmp_bufType(), SpecialTypes);
4356 AddTypeRef(Context.getsigjmp_bufType(), SpecialTypes);
4357 AddTypeRef(Context.ObjCIdRedefinitionType, SpecialTypes);
4358 AddTypeRef(Context.ObjCClassRedefinitionType, SpecialTypes);
4359 AddTypeRef(Context.ObjCSelRedefinitionType, SpecialTypes);
4360 AddTypeRef(Context.getucontext_tType(), SpecialTypes);
4363 // Write the mapping information describing our module dependencies and how
4364 // each of those modules were mapped into our own offset/ID space, so that
4365 // the reader can build the appropriate mapping to its own offset/ID space.
4366 // The map consists solely of a blob with the following format:
4367 // *(module-name-len:i16 module-name:len*i8
4368 // source-location-offset:i32
4369 // identifier-id:i32
4370 // preprocessed-entity-id:i32
4371 // macro-definition-id:i32
4374 // declaration-id:i32
4375 // c++-base-specifiers-id:i32
4378 auto *Abbrev = new BitCodeAbbrev();
4379 Abbrev->Add(BitCodeAbbrevOp(MODULE_OFFSET_MAP));
4380 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
4381 unsigned ModuleOffsetMapAbbrev = Stream.EmitAbbrev(Abbrev);
4382 SmallString<2048> Buffer;
4384 llvm::raw_svector_ostream Out(Buffer);
4385 for (ModuleFile *M : Chain->ModuleMgr) {
4386 using namespace llvm::support;
4387 endian::Writer<little> LE(Out);
4388 StringRef FileName = M->FileName;
4389 LE.write<uint16_t>(FileName.size());
4390 Out.write(FileName.data(), FileName.size());
4392 // Note: if a base ID was uint max, it would not be possible to load
4393 // another module after it or have more than one entity inside it.
4394 uint32_t None = std::numeric_limits<uint32_t>::max();
4396 auto writeBaseIDOrNone = [&](uint32_t BaseID, bool ShouldWrite) {
4397 assert(BaseID < std::numeric_limits<uint32_t>::max() && "base id too high");
4399 LE.write<uint32_t>(BaseID);
4401 LE.write<uint32_t>(None);
4404 // These values should be unique within a chain, since they will be read
4405 // as keys into ContinuousRangeMaps.
4406 writeBaseIDOrNone(M->SLocEntryBaseOffset, M->LocalNumSLocEntries);
4407 writeBaseIDOrNone(M->BaseIdentifierID, M->LocalNumIdentifiers);
4408 writeBaseIDOrNone(M->BaseMacroID, M->LocalNumMacros);
4409 writeBaseIDOrNone(M->BasePreprocessedEntityID,
4410 M->NumPreprocessedEntities);
4411 writeBaseIDOrNone(M->BaseSubmoduleID, M->LocalNumSubmodules);
4412 writeBaseIDOrNone(M->BaseSelectorID, M->LocalNumSelectors);
4413 writeBaseIDOrNone(M->BaseDeclID, M->LocalNumDecls);
4414 writeBaseIDOrNone(M->BaseTypeIndex, M->LocalNumTypes);
4417 RecordData::value_type Record[] = {MODULE_OFFSET_MAP};
4418 Stream.EmitRecordWithBlob(ModuleOffsetMapAbbrev, Record,
4419 Buffer.data(), Buffer.size());
4422 RecordData DeclUpdatesOffsetsRecord;
4424 // Keep writing types, declarations, and declaration update records
4425 // until we've emitted all of them.
4426 Stream.EnterSubblock(DECLTYPES_BLOCK_ID, /*bits for abbreviations*/5);
4430 WriteDeclUpdatesBlocks(DeclUpdatesOffsetsRecord);
4431 while (!DeclTypesToEmit.empty()) {
4432 DeclOrType DOT = DeclTypesToEmit.front();
4433 DeclTypesToEmit.pop();
4435 WriteType(DOT.getType());
4437 WriteDecl(Context, DOT.getDecl());
4439 } while (!DeclUpdates.empty());
4442 DoneWritingDeclsAndTypes = true;
4444 // These things can only be done once we've written out decls and types.
4445 WriteTypeDeclOffsets();
4446 if (!DeclUpdatesOffsetsRecord.empty())
4447 Stream.EmitRecord(DECL_UPDATE_OFFSETS, DeclUpdatesOffsetsRecord);
4448 WriteCXXBaseSpecifiersOffsets();
4449 WriteCXXCtorInitializersOffsets();
4450 WriteFileDeclIDsMap();
4451 WriteSourceManagerBlock(Context.getSourceManager(), PP);
4453 WritePreprocessor(PP, isModule);
4454 WriteHeaderSearch(PP.getHeaderSearchInfo());
4455 WriteSelectors(SemaRef);
4456 WriteReferencedSelectorsPool(SemaRef);
4457 WriteLateParsedTemplates(SemaRef);
4458 WriteIdentifierTable(PP, SemaRef.IdResolver, isModule);
4459 WriteFPPragmaOptions(SemaRef.getFPOptions());
4460 WriteOpenCLExtensions(SemaRef);
4461 WritePragmaDiagnosticMappings(Context.getDiagnostics(), isModule);
4463 // If we're emitting a module, write out the submodule information.
4465 WriteSubmodules(WritingModule);
4467 Stream.EmitRecord(SPECIAL_TYPES, SpecialTypes);
4469 // Write the record containing external, unnamed definitions.
4470 if (!EagerlyDeserializedDecls.empty())
4471 Stream.EmitRecord(EAGERLY_DESERIALIZED_DECLS, EagerlyDeserializedDecls);
4473 // Write the record containing tentative definitions.
4474 if (!TentativeDefinitions.empty())
4475 Stream.EmitRecord(TENTATIVE_DEFINITIONS, TentativeDefinitions);
4477 // Write the record containing unused file scoped decls.
4478 if (!UnusedFileScopedDecls.empty())
4479 Stream.EmitRecord(UNUSED_FILESCOPED_DECLS, UnusedFileScopedDecls);
4481 // Write the record containing weak undeclared identifiers.
4482 if (!WeakUndeclaredIdentifiers.empty())
4483 Stream.EmitRecord(WEAK_UNDECLARED_IDENTIFIERS,
4484 WeakUndeclaredIdentifiers);
4486 // Write the record containing ext_vector type names.
4487 if (!ExtVectorDecls.empty())
4488 Stream.EmitRecord(EXT_VECTOR_DECLS, ExtVectorDecls);
4490 // Write the record containing VTable uses information.
4491 if (!VTableUses.empty())
4492 Stream.EmitRecord(VTABLE_USES, VTableUses);
4494 // Write the record containing potentially unused local typedefs.
4495 if (!UnusedLocalTypedefNameCandidates.empty())
4496 Stream.EmitRecord(UNUSED_LOCAL_TYPEDEF_NAME_CANDIDATES,
4497 UnusedLocalTypedefNameCandidates);
4499 // Write the record containing pending implicit instantiations.
4500 if (!PendingInstantiations.empty())
4501 Stream.EmitRecord(PENDING_IMPLICIT_INSTANTIATIONS, PendingInstantiations);
4503 // Write the record containing declaration references of Sema.
4504 if (!SemaDeclRefs.empty())
4505 Stream.EmitRecord(SEMA_DECL_REFS, SemaDeclRefs);
4507 // Write the record containing CUDA-specific declaration references.
4508 if (!CUDASpecialDeclRefs.empty())
4509 Stream.EmitRecord(CUDA_SPECIAL_DECL_REFS, CUDASpecialDeclRefs);
4511 // Write the delegating constructors.
4512 if (!DelegatingCtorDecls.empty())
4513 Stream.EmitRecord(DELEGATING_CTORS, DelegatingCtorDecls);
4515 // Write the known namespaces.
4516 if (!KnownNamespaces.empty())
4517 Stream.EmitRecord(KNOWN_NAMESPACES, KnownNamespaces);
4519 // Write the undefined internal functions and variables, and inline functions.
4520 if (!UndefinedButUsed.empty())
4521 Stream.EmitRecord(UNDEFINED_BUT_USED, UndefinedButUsed);
4523 if (!DeleteExprsToAnalyze.empty())
4524 Stream.EmitRecord(DELETE_EXPRS_TO_ANALYZE, DeleteExprsToAnalyze);
4526 // Write the visible updates to DeclContexts.
4527 for (auto *DC : UpdatedDeclContexts)
4528 WriteDeclContextVisibleUpdate(DC);
4530 if (!WritingModule) {
4531 // Write the submodules that were imported, if any.
4535 ModuleInfo(uint64_t ID, Module *M) : ID(ID), M(M) {}
4537 llvm::SmallVector<ModuleInfo, 64> Imports;
4538 for (const auto *I : Context.local_imports()) {
4539 assert(SubmoduleIDs.find(I->getImportedModule()) != SubmoduleIDs.end());
4540 Imports.push_back(ModuleInfo(SubmoduleIDs[I->getImportedModule()],
4541 I->getImportedModule()));
4544 if (!Imports.empty()) {
4545 auto Cmp = [](const ModuleInfo &A, const ModuleInfo &B) {
4548 auto Eq = [](const ModuleInfo &A, const ModuleInfo &B) {
4549 return A.ID == B.ID;
4552 // Sort and deduplicate module IDs.
4553 std::sort(Imports.begin(), Imports.end(), Cmp);
4554 Imports.erase(std::unique(Imports.begin(), Imports.end(), Eq),
4557 RecordData ImportedModules;
4558 for (const auto &Import : Imports) {
4559 ImportedModules.push_back(Import.ID);
4560 // FIXME: If the module has macros imported then later has declarations
4561 // imported, this location won't be the right one as a location for the
4562 // declaration imports.
4563 AddSourceLocation(PP.getModuleImportLoc(Import.M), ImportedModules);
4566 Stream.EmitRecord(IMPORTED_MODULES, ImportedModules);
4570 WriteDeclReplacementsBlock();
4571 WriteObjCCategories();
4573 WriteOptimizePragmaOptions(SemaRef);
4575 // Some simple statistics
4576 RecordData::value_type Record[] = {
4577 NumStatements, NumMacros, NumLexicalDeclContexts, NumVisibleDeclContexts};
4578 Stream.EmitRecord(STATISTICS, Record);
4581 // Write the module file extension blocks.
4582 for (const auto &ExtWriter : ModuleFileExtensionWriters)
4583 WriteModuleFileExtension(SemaRef, *ExtWriter);
4588 void ASTWriter::WriteDeclUpdatesBlocks(RecordDataImpl &OffsetsRecord) {
4589 if (DeclUpdates.empty())
4592 DeclUpdateMap LocalUpdates;
4593 LocalUpdates.swap(DeclUpdates);
4595 for (auto &DeclUpdate : LocalUpdates) {
4596 const Decl *D = DeclUpdate.first;
4598 bool HasUpdatedBody = false;
4600 for (auto &Update : DeclUpdate.second) {
4601 DeclUpdateKind Kind = (DeclUpdateKind)Update.getKind();
4603 Record.push_back(Kind);
4605 case UPD_CXX_ADDED_IMPLICIT_MEMBER:
4606 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
4607 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE:
4608 assert(Update.getDecl() && "no decl to add?");
4609 Record.push_back(GetDeclRef(Update.getDecl()));
4612 case UPD_CXX_ADDED_FUNCTION_DEFINITION:
4613 // An updated body is emitted last, so that the reader doesn't need
4614 // to skip over the lazy body to reach statements for other records.
4616 HasUpdatedBody = true;
4619 case UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER:
4620 AddSourceLocation(Update.getLoc(), Record);
4623 case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT:
4624 AddStmt(const_cast<Expr*>(
4625 cast<ParmVarDecl>(Update.getDecl())->getDefaultArg()));
4628 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
4629 auto *RD = cast<CXXRecordDecl>(D);
4630 UpdatedDeclContexts.insert(RD->getPrimaryContext());
4631 AddCXXDefinitionData(RD, Record);
4632 Record.push_back(WriteDeclContextLexicalBlock(
4633 *Context, const_cast<CXXRecordDecl *>(RD)));
4635 // This state is sometimes updated by template instantiation, when we
4636 // switch from the specialization referring to the template declaration
4637 // to it referring to the template definition.
4638 if (auto *MSInfo = RD->getMemberSpecializationInfo()) {
4639 Record.push_back(MSInfo->getTemplateSpecializationKind());
4640 AddSourceLocation(MSInfo->getPointOfInstantiation(), Record);
4642 auto *Spec = cast<ClassTemplateSpecializationDecl>(RD);
4643 Record.push_back(Spec->getTemplateSpecializationKind());
4644 AddSourceLocation(Spec->getPointOfInstantiation(), Record);
4646 // The instantiation might have been resolved to a partial
4647 // specialization. If so, record which one.
4648 auto From = Spec->getInstantiatedFrom();
4649 if (auto PartialSpec =
4650 From.dyn_cast<ClassTemplatePartialSpecializationDecl*>()) {
4651 Record.push_back(true);
4652 AddDeclRef(PartialSpec, Record);
4653 AddTemplateArgumentList(&Spec->getTemplateInstantiationArgs(),
4656 Record.push_back(false);
4659 Record.push_back(RD->getTagKind());
4660 AddSourceLocation(RD->getLocation(), Record);
4661 AddSourceLocation(RD->getLocStart(), Record);
4662 AddSourceLocation(RD->getRBraceLoc(), Record);
4664 // Instantiation may change attributes; write them all out afresh.
4665 Record.push_back(D->hasAttrs());
4667 WriteAttributes(llvm::makeArrayRef(D->getAttrs().begin(),
4668 D->getAttrs().size()), Record);
4670 // FIXME: Ensure we don't get here for explicit instantiations.
4674 case UPD_CXX_RESOLVED_DTOR_DELETE:
4675 AddDeclRef(Update.getDecl(), Record);
4678 case UPD_CXX_RESOLVED_EXCEPTION_SPEC:
4681 cast<FunctionDecl>(D)->getType()->castAs<FunctionProtoType>(),
4685 case UPD_CXX_DEDUCED_RETURN_TYPE:
4686 Record.push_back(GetOrCreateTypeID(Update.getType()));
4689 case UPD_DECL_MARKED_USED:
4692 case UPD_MANGLING_NUMBER:
4693 case UPD_STATIC_LOCAL_NUMBER:
4694 Record.push_back(Update.getNumber());
4697 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
4698 AddSourceRange(D->getAttr<OMPThreadPrivateDeclAttr>()->getRange(),
4702 case UPD_DECL_EXPORTED:
4703 Record.push_back(getSubmoduleID(Update.getModule()));
4706 case UPD_ADDED_ATTR_TO_RECORD:
4707 WriteAttributes(llvm::makeArrayRef(Update.getAttr()), Record);
4712 if (HasUpdatedBody) {
4713 const auto *Def = cast<FunctionDecl>(D);
4714 Record.push_back(UPD_CXX_ADDED_FUNCTION_DEFINITION);
4715 Record.push_back(Def->isInlined());
4716 AddSourceLocation(Def->getInnerLocStart(), Record);
4717 AddFunctionDefinition(Def, Record);
4720 OffsetsRecord.push_back(GetDeclRef(D));
4721 OffsetsRecord.push_back(Stream.GetCurrentBitNo());
4723 Stream.EmitRecord(DECL_UPDATES, Record);
4725 FlushPendingAfterDecl();
4729 void ASTWriter::WriteDeclReplacementsBlock() {
4730 if (ReplacedDecls.empty())
4734 for (const auto &I : ReplacedDecls) {
4735 Record.push_back(I.ID);
4736 Record.push_back(I.Offset);
4737 Record.push_back(I.Loc);
4739 Stream.EmitRecord(DECL_REPLACEMENTS, Record);
4742 void ASTWriter::AddSourceLocation(SourceLocation Loc, RecordDataImpl &Record) {
4743 Record.push_back(Loc.getRawEncoding());
4746 void ASTWriter::AddSourceRange(SourceRange Range, RecordDataImpl &Record) {
4747 AddSourceLocation(Range.getBegin(), Record);
4748 AddSourceLocation(Range.getEnd(), Record);
4751 void ASTWriter::AddAPInt(const llvm::APInt &Value, RecordDataImpl &Record) {
4752 Record.push_back(Value.getBitWidth());
4753 const uint64_t *Words = Value.getRawData();
4754 Record.append(Words, Words + Value.getNumWords());
4757 void ASTWriter::AddAPSInt(const llvm::APSInt &Value, RecordDataImpl &Record) {
4758 Record.push_back(Value.isUnsigned());
4759 AddAPInt(Value, Record);
4762 void ASTWriter::AddAPFloat(const llvm::APFloat &Value, RecordDataImpl &Record) {
4763 AddAPInt(Value.bitcastToAPInt(), Record);
4766 void ASTWriter::AddIdentifierRef(const IdentifierInfo *II, RecordDataImpl &Record) {
4767 Record.push_back(getIdentifierRef(II));
4770 IdentID ASTWriter::getIdentifierRef(const IdentifierInfo *II) {
4774 IdentID &ID = IdentifierIDs[II];
4780 MacroID ASTWriter::getMacroRef(MacroInfo *MI, const IdentifierInfo *Name) {
4781 // Don't emit builtin macros like __LINE__ to the AST file unless they
4782 // have been redefined by the header (in which case they are not
4784 if (!MI || MI->isBuiltinMacro())
4787 MacroID &ID = MacroIDs[MI];
4790 MacroInfoToEmitData Info = { Name, MI, ID };
4791 MacroInfosToEmit.push_back(Info);
4796 MacroID ASTWriter::getMacroID(MacroInfo *MI) {
4797 if (!MI || MI->isBuiltinMacro())
4800 assert(MacroIDs.find(MI) != MacroIDs.end() && "Macro not emitted!");
4801 return MacroIDs[MI];
4804 uint64_t ASTWriter::getMacroDirectivesOffset(const IdentifierInfo *Name) {
4805 return IdentMacroDirectivesOffsetMap.lookup(Name);
4808 void ASTWriter::AddSelectorRef(const Selector SelRef, RecordDataImpl &Record) {
4809 Record.push_back(getSelectorRef(SelRef));
4812 SelectorID ASTWriter::getSelectorRef(Selector Sel) {
4813 if (Sel.getAsOpaquePtr() == nullptr) {
4817 SelectorID SID = SelectorIDs[Sel];
4818 if (SID == 0 && Chain) {
4819 // This might trigger a ReadSelector callback, which will set the ID for
4821 Chain->LoadSelector(Sel);
4822 SID = SelectorIDs[Sel];
4825 SID = NextSelectorID++;
4826 SelectorIDs[Sel] = SID;
4831 void ASTWriter::AddCXXTemporary(const CXXTemporary *Temp, RecordDataImpl &Record) {
4832 AddDeclRef(Temp->getDestructor(), Record);
4835 void ASTWriter::AddCXXCtorInitializersRef(ArrayRef<CXXCtorInitializer *> Inits,
4836 RecordDataImpl &Record) {
4837 assert(!Inits.empty() && "Empty ctor initializer sets are not recorded");
4838 CXXCtorInitializersToWrite.push_back(
4839 QueuedCXXCtorInitializers(NextCXXCtorInitializersID, Inits));
4840 Record.push_back(NextCXXCtorInitializersID++);
4843 void ASTWriter::AddCXXBaseSpecifiersRef(CXXBaseSpecifier const *Bases,
4844 CXXBaseSpecifier const *BasesEnd,
4845 RecordDataImpl &Record) {
4846 assert(Bases != BasesEnd && "Empty base-specifier sets are not recorded");
4847 CXXBaseSpecifiersToWrite.push_back(
4848 QueuedCXXBaseSpecifiers(NextCXXBaseSpecifiersID,
4850 Record.push_back(NextCXXBaseSpecifiersID++);
4853 void ASTWriter::AddTemplateArgumentLocInfo(TemplateArgument::ArgKind Kind,
4854 const TemplateArgumentLocInfo &Arg,
4855 RecordDataImpl &Record) {
4857 case TemplateArgument::Expression:
4858 AddStmt(Arg.getAsExpr());
4860 case TemplateArgument::Type:
4861 AddTypeSourceInfo(Arg.getAsTypeSourceInfo(), Record);
4863 case TemplateArgument::Template:
4864 AddNestedNameSpecifierLoc(Arg.getTemplateQualifierLoc(), Record);
4865 AddSourceLocation(Arg.getTemplateNameLoc(), Record);
4867 case TemplateArgument::TemplateExpansion:
4868 AddNestedNameSpecifierLoc(Arg.getTemplateQualifierLoc(), Record);
4869 AddSourceLocation(Arg.getTemplateNameLoc(), Record);
4870 AddSourceLocation(Arg.getTemplateEllipsisLoc(), Record);
4872 case TemplateArgument::Null:
4873 case TemplateArgument::Integral:
4874 case TemplateArgument::Declaration:
4875 case TemplateArgument::NullPtr:
4876 case TemplateArgument::Pack:
4877 // FIXME: Is this right?
4882 void ASTWriter::AddTemplateArgumentLoc(const TemplateArgumentLoc &Arg,
4883 RecordDataImpl &Record) {
4884 AddTemplateArgument(Arg.getArgument(), Record);
4886 if (Arg.getArgument().getKind() == TemplateArgument::Expression) {
4887 bool InfoHasSameExpr
4888 = Arg.getArgument().getAsExpr() == Arg.getLocInfo().getAsExpr();
4889 Record.push_back(InfoHasSameExpr);
4890 if (InfoHasSameExpr)
4891 return; // Avoid storing the same expr twice.
4893 AddTemplateArgumentLocInfo(Arg.getArgument().getKind(), Arg.getLocInfo(),
4897 void ASTWriter::AddTypeSourceInfo(TypeSourceInfo *TInfo,
4898 RecordDataImpl &Record) {
4900 AddTypeRef(QualType(), Record);
4904 AddTypeLoc(TInfo->getTypeLoc(), Record);
4907 void ASTWriter::AddTypeLoc(TypeLoc TL, RecordDataImpl &Record) {
4908 AddTypeRef(TL.getType(), Record);
4910 TypeLocWriter TLW(*this, Record);
4911 for (; !TL.isNull(); TL = TL.getNextTypeLoc())
4915 void ASTWriter::AddTypeRef(QualType T, RecordDataImpl &Record) {
4916 Record.push_back(GetOrCreateTypeID(T));
4919 TypeID ASTWriter::GetOrCreateTypeID(QualType T) {
4921 return MakeTypeID(*Context, T, [&](QualType T) -> TypeIdx {
4924 assert(!T.getLocalFastQualifiers());
4926 TypeIdx &Idx = TypeIdxs[T];
4927 if (Idx.getIndex() == 0) {
4928 if (DoneWritingDeclsAndTypes) {
4929 assert(0 && "New type seen after serializing all the types to emit!");
4933 // We haven't seen this type before. Assign it a new ID and put it
4934 // into the queue of types to emit.
4935 Idx = TypeIdx(NextTypeID++);
4936 DeclTypesToEmit.push(T);
4942 TypeID ASTWriter::getTypeID(QualType T) const {
4944 return MakeTypeID(*Context, T, [&](QualType T) -> TypeIdx {
4947 assert(!T.getLocalFastQualifiers());
4949 TypeIdxMap::const_iterator I = TypeIdxs.find(T);
4950 assert(I != TypeIdxs.end() && "Type not emitted!");
4955 void ASTWriter::AddDeclRef(const Decl *D, RecordDataImpl &Record) {
4956 Record.push_back(GetDeclRef(D));
4959 DeclID ASTWriter::GetDeclRef(const Decl *D) {
4960 assert(WritingAST && "Cannot request a declaration ID before AST writing");
4966 // If D comes from an AST file, its declaration ID is already known and
4968 if (D->isFromASTFile())
4969 return D->getGlobalID();
4971 assert(!(reinterpret_cast<uintptr_t>(D) & 0x01) && "Invalid decl pointer");
4972 DeclID &ID = DeclIDs[D];
4974 if (DoneWritingDeclsAndTypes) {
4975 assert(0 && "New decl seen after serializing all the decls to emit!");
4979 // We haven't seen this declaration before. Give it a new ID and
4980 // enqueue it in the list of declarations to emit.
4982 DeclTypesToEmit.push(const_cast<Decl *>(D));
4988 DeclID ASTWriter::getDeclID(const Decl *D) {
4992 // If D comes from an AST file, its declaration ID is already known and
4994 if (D->isFromASTFile())
4995 return D->getGlobalID();
4997 assert(DeclIDs.find(D) != DeclIDs.end() && "Declaration not emitted!");
5001 void ASTWriter::associateDeclWithFile(const Decl *D, DeclID ID) {
5005 SourceLocation Loc = D->getLocation();
5006 if (Loc.isInvalid())
5009 // We only keep track of the file-level declarations of each file.
5010 if (!D->getLexicalDeclContext()->isFileContext())
5012 // FIXME: ParmVarDecls that are part of a function type of a parameter of
5013 // a function/objc method, should not have TU as lexical context.
5014 if (isa<ParmVarDecl>(D))
5017 SourceManager &SM = Context->getSourceManager();
5018 SourceLocation FileLoc = SM.getFileLoc(Loc);
5019 assert(SM.isLocalSourceLocation(FileLoc));
5022 std::tie(FID, Offset) = SM.getDecomposedLoc(FileLoc);
5023 if (FID.isInvalid())
5025 assert(SM.getSLocEntry(FID).isFile());
5027 DeclIDInFileInfo *&Info = FileDeclIDs[FID];
5029 Info = new DeclIDInFileInfo();
5031 std::pair<unsigned, serialization::DeclID> LocDecl(Offset, ID);
5032 LocDeclIDsTy &Decls = Info->DeclIDs;
5034 if (Decls.empty() || Decls.back().first <= Offset) {
5035 Decls.push_back(LocDecl);
5039 LocDeclIDsTy::iterator I =
5040 std::upper_bound(Decls.begin(), Decls.end(), LocDecl, llvm::less_first());
5042 Decls.insert(I, LocDecl);
5045 void ASTWriter::AddDeclarationName(DeclarationName Name, RecordDataImpl &Record) {
5046 // FIXME: Emit a stable enum for NameKind. 0 = Identifier etc.
5047 Record.push_back(Name.getNameKind());
5048 switch (Name.getNameKind()) {
5049 case DeclarationName::Identifier:
5050 AddIdentifierRef(Name.getAsIdentifierInfo(), Record);
5053 case DeclarationName::ObjCZeroArgSelector:
5054 case DeclarationName::ObjCOneArgSelector:
5055 case DeclarationName::ObjCMultiArgSelector:
5056 AddSelectorRef(Name.getObjCSelector(), Record);
5059 case DeclarationName::CXXConstructorName:
5060 case DeclarationName::CXXDestructorName:
5061 case DeclarationName::CXXConversionFunctionName:
5062 AddTypeRef(Name.getCXXNameType(), Record);
5065 case DeclarationName::CXXOperatorName:
5066 Record.push_back(Name.getCXXOverloadedOperator());
5069 case DeclarationName::CXXLiteralOperatorName:
5070 AddIdentifierRef(Name.getCXXLiteralIdentifier(), Record);
5073 case DeclarationName::CXXUsingDirective:
5074 // No extra data to emit
5079 unsigned ASTWriter::getAnonymousDeclarationNumber(const NamedDecl *D) {
5080 assert(needsAnonymousDeclarationNumber(D) &&
5081 "expected an anonymous declaration");
5083 // Number the anonymous declarations within this context, if we've not
5085 auto It = AnonymousDeclarationNumbers.find(D);
5086 if (It == AnonymousDeclarationNumbers.end()) {
5087 auto *DC = D->getLexicalDeclContext();
5088 numberAnonymousDeclsWithin(DC, [&](const NamedDecl *ND, unsigned Number) {
5089 AnonymousDeclarationNumbers[ND] = Number;
5092 It = AnonymousDeclarationNumbers.find(D);
5093 assert(It != AnonymousDeclarationNumbers.end() &&
5094 "declaration not found within its lexical context");
5100 void ASTWriter::AddDeclarationNameLoc(const DeclarationNameLoc &DNLoc,
5101 DeclarationName Name, RecordDataImpl &Record) {
5102 switch (Name.getNameKind()) {
5103 case DeclarationName::CXXConstructorName:
5104 case DeclarationName::CXXDestructorName:
5105 case DeclarationName::CXXConversionFunctionName:
5106 AddTypeSourceInfo(DNLoc.NamedType.TInfo, Record);
5109 case DeclarationName::CXXOperatorName:
5111 SourceLocation::getFromRawEncoding(DNLoc.CXXOperatorName.BeginOpNameLoc),
5114 SourceLocation::getFromRawEncoding(DNLoc.CXXOperatorName.EndOpNameLoc),
5118 case DeclarationName::CXXLiteralOperatorName:
5120 SourceLocation::getFromRawEncoding(DNLoc.CXXLiteralOperatorName.OpNameLoc),
5124 case DeclarationName::Identifier:
5125 case DeclarationName::ObjCZeroArgSelector:
5126 case DeclarationName::ObjCOneArgSelector:
5127 case DeclarationName::ObjCMultiArgSelector:
5128 case DeclarationName::CXXUsingDirective:
5133 void ASTWriter::AddDeclarationNameInfo(const DeclarationNameInfo &NameInfo,
5134 RecordDataImpl &Record) {
5135 AddDeclarationName(NameInfo.getName(), Record);
5136 AddSourceLocation(NameInfo.getLoc(), Record);
5137 AddDeclarationNameLoc(NameInfo.getInfo(), NameInfo.getName(), Record);
5140 void ASTWriter::AddQualifierInfo(const QualifierInfo &Info,
5141 RecordDataImpl &Record) {
5142 AddNestedNameSpecifierLoc(Info.QualifierLoc, Record);
5143 Record.push_back(Info.NumTemplParamLists);
5144 for (unsigned i=0, e=Info.NumTemplParamLists; i != e; ++i)
5145 AddTemplateParameterList(Info.TemplParamLists[i], Record);
5148 void ASTWriter::AddNestedNameSpecifier(NestedNameSpecifier *NNS,
5149 RecordDataImpl &Record) {
5150 // Nested name specifiers usually aren't too long. I think that 8 would
5151 // typically accommodate the vast majority.
5152 SmallVector<NestedNameSpecifier *, 8> NestedNames;
5154 // Push each of the NNS's onto a stack for serialization in reverse order.
5156 NestedNames.push_back(NNS);
5157 NNS = NNS->getPrefix();
5160 Record.push_back(NestedNames.size());
5161 while(!NestedNames.empty()) {
5162 NNS = NestedNames.pop_back_val();
5163 NestedNameSpecifier::SpecifierKind Kind = NNS->getKind();
5164 Record.push_back(Kind);
5166 case NestedNameSpecifier::Identifier:
5167 AddIdentifierRef(NNS->getAsIdentifier(), Record);
5170 case NestedNameSpecifier::Namespace:
5171 AddDeclRef(NNS->getAsNamespace(), Record);
5174 case NestedNameSpecifier::NamespaceAlias:
5175 AddDeclRef(NNS->getAsNamespaceAlias(), Record);
5178 case NestedNameSpecifier::TypeSpec:
5179 case NestedNameSpecifier::TypeSpecWithTemplate:
5180 AddTypeRef(QualType(NNS->getAsType(), 0), Record);
5181 Record.push_back(Kind == NestedNameSpecifier::TypeSpecWithTemplate);
5184 case NestedNameSpecifier::Global:
5185 // Don't need to write an associated value.
5188 case NestedNameSpecifier::Super:
5189 AddDeclRef(NNS->getAsRecordDecl(), Record);
5195 void ASTWriter::AddNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS,
5196 RecordDataImpl &Record) {
5197 // Nested name specifiers usually aren't too long. I think that 8 would
5198 // typically accommodate the vast majority.
5199 SmallVector<NestedNameSpecifierLoc , 8> NestedNames;
5201 // Push each of the nested-name-specifiers's onto a stack for
5202 // serialization in reverse order.
5204 NestedNames.push_back(NNS);
5205 NNS = NNS.getPrefix();
5208 Record.push_back(NestedNames.size());
5209 while(!NestedNames.empty()) {
5210 NNS = NestedNames.pop_back_val();
5211 NestedNameSpecifier::SpecifierKind Kind
5212 = NNS.getNestedNameSpecifier()->getKind();
5213 Record.push_back(Kind);
5215 case NestedNameSpecifier::Identifier:
5216 AddIdentifierRef(NNS.getNestedNameSpecifier()->getAsIdentifier(), Record);
5217 AddSourceRange(NNS.getLocalSourceRange(), Record);
5220 case NestedNameSpecifier::Namespace:
5221 AddDeclRef(NNS.getNestedNameSpecifier()->getAsNamespace(), Record);
5222 AddSourceRange(NNS.getLocalSourceRange(), Record);
5225 case NestedNameSpecifier::NamespaceAlias:
5226 AddDeclRef(NNS.getNestedNameSpecifier()->getAsNamespaceAlias(), Record);
5227 AddSourceRange(NNS.getLocalSourceRange(), Record);
5230 case NestedNameSpecifier::TypeSpec:
5231 case NestedNameSpecifier::TypeSpecWithTemplate:
5232 Record.push_back(Kind == NestedNameSpecifier::TypeSpecWithTemplate);
5233 AddTypeLoc(NNS.getTypeLoc(), Record);
5234 AddSourceLocation(NNS.getLocalSourceRange().getEnd(), Record);
5237 case NestedNameSpecifier::Global:
5238 AddSourceLocation(NNS.getLocalSourceRange().getEnd(), Record);
5241 case NestedNameSpecifier::Super:
5242 AddDeclRef(NNS.getNestedNameSpecifier()->getAsRecordDecl(), Record);
5243 AddSourceRange(NNS.getLocalSourceRange(), Record);
5249 void ASTWriter::AddTemplateName(TemplateName Name, RecordDataImpl &Record) {
5250 TemplateName::NameKind Kind = Name.getKind();
5251 Record.push_back(Kind);
5253 case TemplateName::Template:
5254 AddDeclRef(Name.getAsTemplateDecl(), Record);
5257 case TemplateName::OverloadedTemplate: {
5258 OverloadedTemplateStorage *OvT = Name.getAsOverloadedTemplate();
5259 Record.push_back(OvT->size());
5260 for (const auto &I : *OvT)
5261 AddDeclRef(I, Record);
5265 case TemplateName::QualifiedTemplate: {
5266 QualifiedTemplateName *QualT = Name.getAsQualifiedTemplateName();
5267 AddNestedNameSpecifier(QualT->getQualifier(), Record);
5268 Record.push_back(QualT->hasTemplateKeyword());
5269 AddDeclRef(QualT->getTemplateDecl(), Record);
5273 case TemplateName::DependentTemplate: {
5274 DependentTemplateName *DepT = Name.getAsDependentTemplateName();
5275 AddNestedNameSpecifier(DepT->getQualifier(), Record);
5276 Record.push_back(DepT->isIdentifier());
5277 if (DepT->isIdentifier())
5278 AddIdentifierRef(DepT->getIdentifier(), Record);
5280 Record.push_back(DepT->getOperator());
5284 case TemplateName::SubstTemplateTemplateParm: {
5285 SubstTemplateTemplateParmStorage *subst
5286 = Name.getAsSubstTemplateTemplateParm();
5287 AddDeclRef(subst->getParameter(), Record);
5288 AddTemplateName(subst->getReplacement(), Record);
5292 case TemplateName::SubstTemplateTemplateParmPack: {
5293 SubstTemplateTemplateParmPackStorage *SubstPack
5294 = Name.getAsSubstTemplateTemplateParmPack();
5295 AddDeclRef(SubstPack->getParameterPack(), Record);
5296 AddTemplateArgument(SubstPack->getArgumentPack(), Record);
5302 void ASTWriter::AddTemplateArgument(const TemplateArgument &Arg,
5303 RecordDataImpl &Record) {
5304 Record.push_back(Arg.getKind());
5305 switch (Arg.getKind()) {
5306 case TemplateArgument::Null:
5308 case TemplateArgument::Type:
5309 AddTypeRef(Arg.getAsType(), Record);
5311 case TemplateArgument::Declaration:
5312 AddDeclRef(Arg.getAsDecl(), Record);
5313 AddTypeRef(Arg.getParamTypeForDecl(), Record);
5315 case TemplateArgument::NullPtr:
5316 AddTypeRef(Arg.getNullPtrType(), Record);
5318 case TemplateArgument::Integral:
5319 AddAPSInt(Arg.getAsIntegral(), Record);
5320 AddTypeRef(Arg.getIntegralType(), Record);
5322 case TemplateArgument::Template:
5323 AddTemplateName(Arg.getAsTemplateOrTemplatePattern(), Record);
5325 case TemplateArgument::TemplateExpansion:
5326 AddTemplateName(Arg.getAsTemplateOrTemplatePattern(), Record);
5327 if (Optional<unsigned> NumExpansions = Arg.getNumTemplateExpansions())
5328 Record.push_back(*NumExpansions + 1);
5330 Record.push_back(0);
5332 case TemplateArgument::Expression:
5333 AddStmt(Arg.getAsExpr());
5335 case TemplateArgument::Pack:
5336 Record.push_back(Arg.pack_size());
5337 for (const auto &P : Arg.pack_elements())
5338 AddTemplateArgument(P, Record);
5344 ASTWriter::AddTemplateParameterList(const TemplateParameterList *TemplateParams,
5345 RecordDataImpl &Record) {
5346 assert(TemplateParams && "No TemplateParams!");
5347 AddSourceLocation(TemplateParams->getTemplateLoc(), Record);
5348 AddSourceLocation(TemplateParams->getLAngleLoc(), Record);
5349 AddSourceLocation(TemplateParams->getRAngleLoc(), Record);
5350 Record.push_back(TemplateParams->size());
5351 for (const auto &P : *TemplateParams)
5352 AddDeclRef(P, Record);
5355 /// \brief Emit a template argument list.
5357 ASTWriter::AddTemplateArgumentList(const TemplateArgumentList *TemplateArgs,
5358 RecordDataImpl &Record) {
5359 assert(TemplateArgs && "No TemplateArgs!");
5360 Record.push_back(TemplateArgs->size());
5361 for (int i=0, e = TemplateArgs->size(); i != e; ++i)
5362 AddTemplateArgument(TemplateArgs->get(i), Record);
5366 ASTWriter::AddASTTemplateArgumentListInfo
5367 (const ASTTemplateArgumentListInfo *ASTTemplArgList, RecordDataImpl &Record) {
5368 assert(ASTTemplArgList && "No ASTTemplArgList!");
5369 AddSourceLocation(ASTTemplArgList->LAngleLoc, Record);
5370 AddSourceLocation(ASTTemplArgList->RAngleLoc, Record);
5371 Record.push_back(ASTTemplArgList->NumTemplateArgs);
5372 const TemplateArgumentLoc *TemplArgs = ASTTemplArgList->getTemplateArgs();
5373 for (int i=0, e = ASTTemplArgList->NumTemplateArgs; i != e; ++i)
5374 AddTemplateArgumentLoc(TemplArgs[i], Record);
5378 ASTWriter::AddUnresolvedSet(const ASTUnresolvedSet &Set, RecordDataImpl &Record) {
5379 Record.push_back(Set.size());
5380 for (ASTUnresolvedSet::const_iterator
5381 I = Set.begin(), E = Set.end(); I != E; ++I) {
5382 AddDeclRef(I.getDecl(), Record);
5383 Record.push_back(I.getAccess());
5387 void ASTWriter::AddCXXBaseSpecifier(const CXXBaseSpecifier &Base,
5388 RecordDataImpl &Record) {
5389 Record.push_back(Base.isVirtual());
5390 Record.push_back(Base.isBaseOfClass());
5391 Record.push_back(Base.getAccessSpecifierAsWritten());
5392 Record.push_back(Base.getInheritConstructors());
5393 AddTypeSourceInfo(Base.getTypeSourceInfo(), Record);
5394 AddSourceRange(Base.getSourceRange(), Record);
5395 AddSourceLocation(Base.isPackExpansion()? Base.getEllipsisLoc()
5400 void ASTWriter::FlushCXXBaseSpecifiers() {
5402 unsigned N = CXXBaseSpecifiersToWrite.size();
5403 for (unsigned I = 0; I != N; ++I) {
5406 // Record the offset of this base-specifier set.
5407 unsigned Index = CXXBaseSpecifiersToWrite[I].ID - 1;
5408 if (Index == CXXBaseSpecifiersOffsets.size())
5409 CXXBaseSpecifiersOffsets.push_back(Stream.GetCurrentBitNo());
5411 if (Index > CXXBaseSpecifiersOffsets.size())
5412 CXXBaseSpecifiersOffsets.resize(Index + 1);
5413 CXXBaseSpecifiersOffsets[Index] = Stream.GetCurrentBitNo();
5416 const CXXBaseSpecifier *B = CXXBaseSpecifiersToWrite[I].Bases,
5417 *BEnd = CXXBaseSpecifiersToWrite[I].BasesEnd;
5418 Record.push_back(BEnd - B);
5419 for (; B != BEnd; ++B)
5420 AddCXXBaseSpecifier(*B, Record);
5421 Stream.EmitRecord(serialization::DECL_CXX_BASE_SPECIFIERS, Record);
5423 // Flush any expressions that were written as part of the base specifiers.
5427 assert(N == CXXBaseSpecifiersToWrite.size() &&
5428 "added more base specifiers while writing base specifiers");
5429 CXXBaseSpecifiersToWrite.clear();
5432 void ASTWriter::AddCXXCtorInitializers(
5433 const CXXCtorInitializer * const *CtorInitializers,
5434 unsigned NumCtorInitializers,
5435 RecordDataImpl &Record) {
5436 Record.push_back(NumCtorInitializers);
5437 for (unsigned i=0; i != NumCtorInitializers; ++i) {
5438 const CXXCtorInitializer *Init = CtorInitializers[i];
5440 if (Init->isBaseInitializer()) {
5441 Record.push_back(CTOR_INITIALIZER_BASE);
5442 AddTypeSourceInfo(Init->getTypeSourceInfo(), Record);
5443 Record.push_back(Init->isBaseVirtual());
5444 } else if (Init->isDelegatingInitializer()) {
5445 Record.push_back(CTOR_INITIALIZER_DELEGATING);
5446 AddTypeSourceInfo(Init->getTypeSourceInfo(), Record);
5447 } else if (Init->isMemberInitializer()){
5448 Record.push_back(CTOR_INITIALIZER_MEMBER);
5449 AddDeclRef(Init->getMember(), Record);
5451 Record.push_back(CTOR_INITIALIZER_INDIRECT_MEMBER);
5452 AddDeclRef(Init->getIndirectMember(), Record);
5455 AddSourceLocation(Init->getMemberLocation(), Record);
5456 AddStmt(Init->getInit());
5457 AddSourceLocation(Init->getLParenLoc(), Record);
5458 AddSourceLocation(Init->getRParenLoc(), Record);
5459 Record.push_back(Init->isWritten());
5460 if (Init->isWritten()) {
5461 Record.push_back(Init->getSourceOrder());
5463 Record.push_back(Init->getNumArrayIndices());
5464 for (unsigned i=0, e=Init->getNumArrayIndices(); i != e; ++i)
5465 AddDeclRef(Init->getArrayIndex(i), Record);
5470 void ASTWriter::FlushCXXCtorInitializers() {
5473 unsigned N = CXXCtorInitializersToWrite.size();
5474 (void)N; // Silence unused warning in non-assert builds.
5475 for (auto &Init : CXXCtorInitializersToWrite) {
5478 // Record the offset of this mem-initializer list.
5479 unsigned Index = Init.ID - 1;
5480 if (Index == CXXCtorInitializersOffsets.size())
5481 CXXCtorInitializersOffsets.push_back(Stream.GetCurrentBitNo());
5483 if (Index > CXXCtorInitializersOffsets.size())
5484 CXXCtorInitializersOffsets.resize(Index + 1);
5485 CXXCtorInitializersOffsets[Index] = Stream.GetCurrentBitNo();
5488 AddCXXCtorInitializers(Init.Inits.data(), Init.Inits.size(), Record);
5489 Stream.EmitRecord(serialization::DECL_CXX_CTOR_INITIALIZERS, Record);
5491 // Flush any expressions that were written as part of the initializers.
5495 assert(N == CXXCtorInitializersToWrite.size() &&
5496 "added more ctor initializers while writing ctor initializers");
5497 CXXCtorInitializersToWrite.clear();
5500 void ASTWriter::AddCXXDefinitionData(const CXXRecordDecl *D, RecordDataImpl &Record) {
5501 auto &Data = D->data();
5502 Record.push_back(Data.IsLambda);
5503 Record.push_back(Data.UserDeclaredConstructor);
5504 Record.push_back(Data.UserDeclaredSpecialMembers);
5505 Record.push_back(Data.Aggregate);
5506 Record.push_back(Data.PlainOldData);
5507 Record.push_back(Data.Empty);
5508 Record.push_back(Data.Polymorphic);
5509 Record.push_back(Data.Abstract);
5510 Record.push_back(Data.IsStandardLayout);
5511 Record.push_back(Data.HasNoNonEmptyBases);
5512 Record.push_back(Data.HasPrivateFields);
5513 Record.push_back(Data.HasProtectedFields);
5514 Record.push_back(Data.HasPublicFields);
5515 Record.push_back(Data.HasMutableFields);
5516 Record.push_back(Data.HasVariantMembers);
5517 Record.push_back(Data.HasOnlyCMembers);
5518 Record.push_back(Data.HasInClassInitializer);
5519 Record.push_back(Data.HasUninitializedReferenceMember);
5520 Record.push_back(Data.NeedOverloadResolutionForMoveConstructor);
5521 Record.push_back(Data.NeedOverloadResolutionForMoveAssignment);
5522 Record.push_back(Data.NeedOverloadResolutionForDestructor);
5523 Record.push_back(Data.DefaultedMoveConstructorIsDeleted);
5524 Record.push_back(Data.DefaultedMoveAssignmentIsDeleted);
5525 Record.push_back(Data.DefaultedDestructorIsDeleted);
5526 Record.push_back(Data.HasTrivialSpecialMembers);
5527 Record.push_back(Data.DeclaredNonTrivialSpecialMembers);
5528 Record.push_back(Data.HasIrrelevantDestructor);
5529 Record.push_back(Data.HasConstexprNonCopyMoveConstructor);
5530 Record.push_back(Data.DefaultedDefaultConstructorIsConstexpr);
5531 Record.push_back(Data.HasConstexprDefaultConstructor);
5532 Record.push_back(Data.HasNonLiteralTypeFieldsOrBases);
5533 Record.push_back(Data.ComputedVisibleConversions);
5534 Record.push_back(Data.UserProvidedDefaultConstructor);
5535 Record.push_back(Data.DeclaredSpecialMembers);
5536 Record.push_back(Data.ImplicitCopyConstructorHasConstParam);
5537 Record.push_back(Data.ImplicitCopyAssignmentHasConstParam);
5538 Record.push_back(Data.HasDeclaredCopyConstructorWithConstParam);
5539 Record.push_back(Data.HasDeclaredCopyAssignmentWithConstParam);
5540 // IsLambda bit is already saved.
5542 Record.push_back(Data.NumBases);
5543 if (Data.NumBases > 0)
5544 AddCXXBaseSpecifiersRef(Data.getBases(), Data.getBases() + Data.NumBases,
5547 // FIXME: Make VBases lazily computed when needed to avoid storing them.
5548 Record.push_back(Data.NumVBases);
5549 if (Data.NumVBases > 0)
5550 AddCXXBaseSpecifiersRef(Data.getVBases(), Data.getVBases() + Data.NumVBases,
5553 AddUnresolvedSet(Data.Conversions.get(*Context), Record);
5554 AddUnresolvedSet(Data.VisibleConversions.get(*Context), Record);
5555 // Data.Definition is the owning decl, no need to write it.
5556 AddDeclRef(D->getFirstFriend(), Record);
5558 // Add lambda-specific data.
5559 if (Data.IsLambda) {
5560 auto &Lambda = D->getLambdaData();
5561 Record.push_back(Lambda.Dependent);
5562 Record.push_back(Lambda.IsGenericLambda);
5563 Record.push_back(Lambda.CaptureDefault);
5564 Record.push_back(Lambda.NumCaptures);
5565 Record.push_back(Lambda.NumExplicitCaptures);
5566 Record.push_back(Lambda.ManglingNumber);
5567 AddDeclRef(Lambda.ContextDecl, Record);
5568 AddTypeSourceInfo(Lambda.MethodTyInfo, Record);
5569 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
5570 const LambdaCapture &Capture = Lambda.Captures[I];
5571 AddSourceLocation(Capture.getLocation(), Record);
5572 Record.push_back(Capture.isImplicit());
5573 Record.push_back(Capture.getCaptureKind());
5574 switch (Capture.getCaptureKind()) {
5581 Capture.capturesVariable() ? Capture.getCapturedVar() : nullptr;
5582 AddDeclRef(Var, Record);
5583 AddSourceLocation(Capture.isPackExpansion() ? Capture.getEllipsisLoc()
5592 void ASTWriter::ReaderInitialized(ASTReader *Reader) {
5593 assert(Reader && "Cannot remove chain");
5594 assert((!Chain || Chain == Reader) && "Cannot replace chain");
5595 assert(FirstDeclID == NextDeclID &&
5596 FirstTypeID == NextTypeID &&
5597 FirstIdentID == NextIdentID &&
5598 FirstMacroID == NextMacroID &&
5599 FirstSubmoduleID == NextSubmoduleID &&
5600 FirstSelectorID == NextSelectorID &&
5601 "Setting chain after writing has started.");
5605 // Note, this will get called multiple times, once one the reader starts up
5606 // and again each time it's done reading a PCH or module.
5607 FirstDeclID = NUM_PREDEF_DECL_IDS + Chain->getTotalNumDecls();
5608 FirstTypeID = NUM_PREDEF_TYPE_IDS + Chain->getTotalNumTypes();
5609 FirstIdentID = NUM_PREDEF_IDENT_IDS + Chain->getTotalNumIdentifiers();
5610 FirstMacroID = NUM_PREDEF_MACRO_IDS + Chain->getTotalNumMacros();
5611 FirstSubmoduleID = NUM_PREDEF_SUBMODULE_IDS + Chain->getTotalNumSubmodules();
5612 FirstSelectorID = NUM_PREDEF_SELECTOR_IDS + Chain->getTotalNumSelectors();
5613 NextDeclID = FirstDeclID;
5614 NextTypeID = FirstTypeID;
5615 NextIdentID = FirstIdentID;
5616 NextMacroID = FirstMacroID;
5617 NextSelectorID = FirstSelectorID;
5618 NextSubmoduleID = FirstSubmoduleID;
5621 void ASTWriter::IdentifierRead(IdentID ID, IdentifierInfo *II) {
5622 // Always keep the highest ID. See \p TypeRead() for more information.
5623 IdentID &StoredID = IdentifierIDs[II];
5628 void ASTWriter::MacroRead(serialization::MacroID ID, MacroInfo *MI) {
5629 // Always keep the highest ID. See \p TypeRead() for more information.
5630 MacroID &StoredID = MacroIDs[MI];
5635 void ASTWriter::TypeRead(TypeIdx Idx, QualType T) {
5636 // Always take the highest-numbered type index. This copes with an interesting
5637 // case for chained AST writing where we schedule writing the type and then,
5638 // later, deserialize the type from another AST. In this case, we want to
5639 // keep the higher-numbered entry so that we can properly write it out to
5641 TypeIdx &StoredIdx = TypeIdxs[T];
5642 if (Idx.getIndex() >= StoredIdx.getIndex())
5646 void ASTWriter::SelectorRead(SelectorID ID, Selector S) {
5647 // Always keep the highest ID. See \p TypeRead() for more information.
5648 SelectorID &StoredID = SelectorIDs[S];
5653 void ASTWriter::MacroDefinitionRead(serialization::PreprocessedEntityID ID,
5654 MacroDefinitionRecord *MD) {
5655 assert(MacroDefinitions.find(MD) == MacroDefinitions.end());
5656 MacroDefinitions[MD] = ID;
5659 void ASTWriter::ModuleRead(serialization::SubmoduleID ID, Module *Mod) {
5660 assert(SubmoduleIDs.find(Mod) == SubmoduleIDs.end());
5661 SubmoduleIDs[Mod] = ID;
5664 void ASTWriter::CompletedTagDefinition(const TagDecl *D) {
5665 assert(D->isCompleteDefinition());
5666 assert(!WritingAST && "Already writing the AST!");
5667 if (auto *RD = dyn_cast<CXXRecordDecl>(D)) {
5668 // We are interested when a PCH decl is modified.
5669 if (RD->isFromASTFile()) {
5670 // A forward reference was mutated into a definition. Rewrite it.
5671 // FIXME: This happens during template instantiation, should we
5672 // have created a new definition decl instead ?
5673 assert(isTemplateInstantiation(RD->getTemplateSpecializationKind()) &&
5674 "completed a tag from another module but not by instantiation?");
5675 DeclUpdates[RD].push_back(
5676 DeclUpdate(UPD_CXX_INSTANTIATED_CLASS_DEFINITION));
5681 static bool isImportedDeclContext(ASTReader *Chain, const Decl *D) {
5682 if (D->isFromASTFile())
5685 // If we've not loaded any modules, this can't be imported.
5686 if (!Chain || !Chain->getModuleManager().size())
5689 // The predefined __va_list_tag struct is imported if we imported any decls.
5690 // FIXME: This is a gross hack.
5691 return D == D->getASTContext().getVaListTagDecl();
5694 void ASTWriter::AddedVisibleDecl(const DeclContext *DC, const Decl *D) {
5695 // TU and namespaces are handled elsewhere.
5696 if (isa<TranslationUnitDecl>(DC) || isa<NamespaceDecl>(DC))
5699 // We're only interested in cases where a local declaration is added to an
5700 // imported context.
5701 if (D->isFromASTFile() || !isImportedDeclContext(Chain, cast<Decl>(DC)))
5704 assert(DC == DC->getPrimaryContext() && "added to non-primary context");
5705 assert(!getDefinitiveDeclContext(DC) && "DeclContext not definitive!");
5706 assert(!WritingAST && "Already writing the AST!");
5707 if (UpdatedDeclContexts.insert(DC) && !cast<Decl>(DC)->isFromASTFile()) {
5708 // We're adding a visible declaration to a predefined decl context. Ensure
5709 // that we write out all of its lookup results so we don't get a nasty
5710 // surprise when we try to emit its lookup table.
5711 for (auto *Child : DC->decls())
5712 UpdatingVisibleDecls.push_back(Child);
5714 UpdatingVisibleDecls.push_back(D);
5717 void ASTWriter::AddedCXXImplicitMember(const CXXRecordDecl *RD, const Decl *D) {
5718 assert(D->isImplicit());
5720 // We're only interested in cases where a local declaration is added to an
5721 // imported context.
5722 if (D->isFromASTFile() || !isImportedDeclContext(Chain, RD))
5725 if (!isa<CXXMethodDecl>(D))
5728 // A decl coming from PCH was modified.
5729 assert(RD->isCompleteDefinition());
5730 assert(!WritingAST && "Already writing the AST!");
5731 DeclUpdates[RD].push_back(DeclUpdate(UPD_CXX_ADDED_IMPLICIT_MEMBER, D));
5734 void ASTWriter::ResolvedExceptionSpec(const FunctionDecl *FD) {
5735 assert(!DoneWritingDeclsAndTypes && "Already done writing updates!");
5737 Chain->forEachImportedKeyDecl(FD, [&](const Decl *D) {
5738 // If we don't already know the exception specification for this redecl
5739 // chain, add an update record for it.
5740 if (isUnresolvedExceptionSpec(cast<FunctionDecl>(D)
5742 ->castAs<FunctionProtoType>()
5743 ->getExceptionSpecType()))
5744 DeclUpdates[D].push_back(UPD_CXX_RESOLVED_EXCEPTION_SPEC);
5748 void ASTWriter::DeducedReturnType(const FunctionDecl *FD, QualType ReturnType) {
5749 assert(!WritingAST && "Already writing the AST!");
5751 Chain->forEachImportedKeyDecl(FD, [&](const Decl *D) {
5752 DeclUpdates[D].push_back(
5753 DeclUpdate(UPD_CXX_DEDUCED_RETURN_TYPE, ReturnType));
5757 void ASTWriter::ResolvedOperatorDelete(const CXXDestructorDecl *DD,
5758 const FunctionDecl *Delete) {
5759 assert(!WritingAST && "Already writing the AST!");
5760 assert(Delete && "Not given an operator delete");
5762 Chain->forEachImportedKeyDecl(DD, [&](const Decl *D) {
5763 DeclUpdates[D].push_back(DeclUpdate(UPD_CXX_RESOLVED_DTOR_DELETE, Delete));
5767 void ASTWriter::CompletedImplicitDefinition(const FunctionDecl *D) {
5768 assert(!WritingAST && "Already writing the AST!");
5769 if (!D->isFromASTFile())
5770 return; // Declaration not imported from PCH.
5772 // Implicit function decl from a PCH was defined.
5773 DeclUpdates[D].push_back(DeclUpdate(UPD_CXX_ADDED_FUNCTION_DEFINITION));
5776 void ASTWriter::FunctionDefinitionInstantiated(const FunctionDecl *D) {
5777 assert(!WritingAST && "Already writing the AST!");
5778 if (!D->isFromASTFile())
5781 DeclUpdates[D].push_back(DeclUpdate(UPD_CXX_ADDED_FUNCTION_DEFINITION));
5784 void ASTWriter::StaticDataMemberInstantiated(const VarDecl *D) {
5785 assert(!WritingAST && "Already writing the AST!");
5786 if (!D->isFromASTFile())
5789 // Since the actual instantiation is delayed, this really means that we need
5790 // to update the instantiation location.
5791 DeclUpdates[D].push_back(
5792 DeclUpdate(UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER,
5793 D->getMemberSpecializationInfo()->getPointOfInstantiation()));
5796 void ASTWriter::DefaultArgumentInstantiated(const ParmVarDecl *D) {
5797 assert(!WritingAST && "Already writing the AST!");
5798 if (!D->isFromASTFile())
5801 DeclUpdates[D].push_back(
5802 DeclUpdate(UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT, D));
5805 void ASTWriter::AddedObjCCategoryToInterface(const ObjCCategoryDecl *CatD,
5806 const ObjCInterfaceDecl *IFD) {
5807 assert(!WritingAST && "Already writing the AST!");
5808 if (!IFD->isFromASTFile())
5809 return; // Declaration not imported from PCH.
5811 assert(IFD->getDefinition() && "Category on a class without a definition?");
5812 ObjCClassesWithCategories.insert(
5813 const_cast<ObjCInterfaceDecl *>(IFD->getDefinition()));
5816 void ASTWriter::DeclarationMarkedUsed(const Decl *D) {
5817 assert(!WritingAST && "Already writing the AST!");
5818 if (!D->isFromASTFile())
5821 DeclUpdates[D].push_back(DeclUpdate(UPD_DECL_MARKED_USED));
5824 void ASTWriter::DeclarationMarkedOpenMPThreadPrivate(const Decl *D) {
5825 assert(!WritingAST && "Already writing the AST!");
5826 if (!D->isFromASTFile())
5829 DeclUpdates[D].push_back(DeclUpdate(UPD_DECL_MARKED_OPENMP_THREADPRIVATE));
5832 void ASTWriter::RedefinedHiddenDefinition(const NamedDecl *D, Module *M) {
5833 assert(!WritingAST && "Already writing the AST!");
5834 assert(D->isHidden() && "expected a hidden declaration");
5835 DeclUpdates[D].push_back(DeclUpdate(UPD_DECL_EXPORTED, M));
5838 void ASTWriter::AddedAttributeToRecord(const Attr *Attr,
5839 const RecordDecl *Record) {
5840 assert(!WritingAST && "Already writing the AST!");
5841 if (!Record->isFromASTFile())
5843 DeclUpdates[Record].push_back(DeclUpdate(UPD_ADDED_ATTR_TO_RECORD, Attr));