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 "ASTCommon.h"
16 #include "ASTReaderInternals.h"
17 #include "MultiOnDiskHashTable.h"
18 #include "clang/AST/ASTContext.h"
19 #include "clang/AST/ASTUnresolvedSet.h"
20 #include "clang/AST/Decl.h"
21 #include "clang/AST/DeclCXX.h"
22 #include "clang/AST/DeclContextInternals.h"
23 #include "clang/AST/DeclFriend.h"
24 #include "clang/AST/DeclTemplate.h"
25 #include "clang/AST/Expr.h"
26 #include "clang/AST/ExprCXX.h"
27 #include "clang/AST/LambdaCapture.h"
28 #include "clang/AST/NestedNameSpecifier.h"
29 #include "clang/AST/RawCommentList.h"
30 #include "clang/AST/TemplateName.h"
31 #include "clang/AST/Type.h"
32 #include "clang/AST/TypeLocVisitor.h"
33 #include "clang/Basic/DiagnosticOptions.h"
34 #include "clang/Basic/FileManager.h"
35 #include "clang/Basic/FileSystemOptions.h"
36 #include "clang/Basic/LLVM.h"
37 #include "clang/Basic/LangOptions.h"
38 #include "clang/Basic/MemoryBufferCache.h"
39 #include "clang/Basic/Module.h"
40 #include "clang/Basic/ObjCRuntime.h"
41 #include "clang/Basic/SourceManager.h"
42 #include "clang/Basic/SourceManagerInternals.h"
43 #include "clang/Basic/TargetInfo.h"
44 #include "clang/Basic/TargetOptions.h"
45 #include "clang/Basic/Version.h"
46 #include "clang/Basic/VersionTuple.h"
47 #include "clang/Lex/HeaderSearch.h"
48 #include "clang/Lex/HeaderSearchOptions.h"
49 #include "clang/Lex/MacroInfo.h"
50 #include "clang/Lex/ModuleMap.h"
51 #include "clang/Lex/PreprocessingRecord.h"
52 #include "clang/Lex/Preprocessor.h"
53 #include "clang/Lex/PreprocessorOptions.h"
54 #include "clang/Lex/Token.h"
55 #include "clang/Sema/IdentifierResolver.h"
56 #include "clang/Sema/ObjCMethodList.h"
57 #include "clang/Sema/Sema.h"
58 #include "clang/Sema/Weak.h"
59 #include "clang/Serialization/ASTReader.h"
60 #include "clang/Serialization/Module.h"
61 #include "clang/Serialization/ModuleFileExtension.h"
62 #include "clang/Serialization/SerializationDiagnostic.h"
63 #include "llvm/ADT/APFloat.h"
64 #include "llvm/ADT/APInt.h"
65 #include "llvm/ADT/Hashing.h"
66 #include "llvm/ADT/IntrusiveRefCntPtr.h"
67 #include "llvm/ADT/Optional.h"
68 #include "llvm/ADT/STLExtras.h"
69 #include "llvm/ADT/SmallSet.h"
70 #include "llvm/ADT/SmallString.h"
71 #include "llvm/ADT/StringExtras.h"
72 #include "llvm/Bitcode/BitCodes.h"
73 #include "llvm/Bitcode/BitstreamWriter.h"
74 #include "llvm/Support/Casting.h"
75 #include "llvm/Support/Compression.h"
76 #include "llvm/Support/EndianStream.h"
77 #include "llvm/Support/Error.h"
78 #include "llvm/Support/ErrorHandling.h"
79 #include "llvm/Support/MemoryBuffer.h"
80 #include "llvm/Support/OnDiskHashTable.h"
81 #include "llvm/Support/Path.h"
82 #include "llvm/Support/Process.h"
83 #include "llvm/Support/SHA1.h"
84 #include "llvm/Support/raw_ostream.h"
96 using namespace clang;
97 using namespace clang::serialization;
99 template <typename T, typename Allocator>
100 static StringRef bytes(const std::vector<T, Allocator> &v) {
101 if (v.empty()) return StringRef();
102 return StringRef(reinterpret_cast<const char*>(&v[0]),
103 sizeof(T) * v.size());
106 template <typename T>
107 static StringRef bytes(const SmallVectorImpl<T> &v) {
108 return StringRef(reinterpret_cast<const char*>(v.data()),
109 sizeof(T) * v.size());
112 //===----------------------------------------------------------------------===//
113 // Type serialization
114 //===----------------------------------------------------------------------===//
118 class ASTTypeWriter {
120 ASTRecordWriter Record;
122 /// \brief Type code that corresponds to the record generated.
124 /// \brief Abbreviation to use for the record, if any.
125 unsigned AbbrevToUse;
128 ASTTypeWriter(ASTWriter &Writer, ASTWriter::RecordDataImpl &Record)
129 : Writer(Writer), Record(Writer, Record), Code((TypeCode)0), AbbrevToUse(0) { }
132 return Record.Emit(Code, AbbrevToUse);
135 void Visit(QualType T) {
136 if (T.hasLocalNonFastQualifiers()) {
137 Qualifiers Qs = T.getLocalQualifiers();
138 Record.AddTypeRef(T.getLocalUnqualifiedType());
139 Record.push_back(Qs.getAsOpaqueValue());
140 Code = TYPE_EXT_QUAL;
141 AbbrevToUse = Writer.TypeExtQualAbbrev;
143 switch (T->getTypeClass()) {
144 // For all of the concrete, non-dependent types, call the
145 // appropriate visitor function.
146 #define TYPE(Class, Base) \
147 case Type::Class: Visit##Class##Type(cast<Class##Type>(T)); break;
148 #define ABSTRACT_TYPE(Class, Base)
149 #include "clang/AST/TypeNodes.def"
154 void VisitArrayType(const ArrayType *T);
155 void VisitFunctionType(const FunctionType *T);
156 void VisitTagType(const TagType *T);
158 #define TYPE(Class, Base) void Visit##Class##Type(const Class##Type *T);
159 #define ABSTRACT_TYPE(Class, Base)
160 #include "clang/AST/TypeNodes.def"
163 } // end namespace clang
165 void ASTTypeWriter::VisitBuiltinType(const BuiltinType *T) {
166 llvm_unreachable("Built-in types are never serialized");
169 void ASTTypeWriter::VisitComplexType(const ComplexType *T) {
170 Record.AddTypeRef(T->getElementType());
174 void ASTTypeWriter::VisitPointerType(const PointerType *T) {
175 Record.AddTypeRef(T->getPointeeType());
179 void ASTTypeWriter::VisitDecayedType(const DecayedType *T) {
180 Record.AddTypeRef(T->getOriginalType());
184 void ASTTypeWriter::VisitAdjustedType(const AdjustedType *T) {
185 Record.AddTypeRef(T->getOriginalType());
186 Record.AddTypeRef(T->getAdjustedType());
187 Code = TYPE_ADJUSTED;
190 void ASTTypeWriter::VisitBlockPointerType(const BlockPointerType *T) {
191 Record.AddTypeRef(T->getPointeeType());
192 Code = TYPE_BLOCK_POINTER;
195 void ASTTypeWriter::VisitLValueReferenceType(const LValueReferenceType *T) {
196 Record.AddTypeRef(T->getPointeeTypeAsWritten());
197 Record.push_back(T->isSpelledAsLValue());
198 Code = TYPE_LVALUE_REFERENCE;
201 void ASTTypeWriter::VisitRValueReferenceType(const RValueReferenceType *T) {
202 Record.AddTypeRef(T->getPointeeTypeAsWritten());
203 Code = TYPE_RVALUE_REFERENCE;
206 void ASTTypeWriter::VisitMemberPointerType(const MemberPointerType *T) {
207 Record.AddTypeRef(T->getPointeeType());
208 Record.AddTypeRef(QualType(T->getClass(), 0));
209 Code = TYPE_MEMBER_POINTER;
212 void ASTTypeWriter::VisitArrayType(const ArrayType *T) {
213 Record.AddTypeRef(T->getElementType());
214 Record.push_back(T->getSizeModifier()); // FIXME: stable values
215 Record.push_back(T->getIndexTypeCVRQualifiers()); // FIXME: stable values
218 void ASTTypeWriter::VisitConstantArrayType(const ConstantArrayType *T) {
220 Record.AddAPInt(T->getSize());
221 Code = TYPE_CONSTANT_ARRAY;
224 void ASTTypeWriter::VisitIncompleteArrayType(const IncompleteArrayType *T) {
226 Code = TYPE_INCOMPLETE_ARRAY;
229 void ASTTypeWriter::VisitVariableArrayType(const VariableArrayType *T) {
231 Record.AddSourceLocation(T->getLBracketLoc());
232 Record.AddSourceLocation(T->getRBracketLoc());
233 Record.AddStmt(T->getSizeExpr());
234 Code = TYPE_VARIABLE_ARRAY;
237 void ASTTypeWriter::VisitVectorType(const VectorType *T) {
238 Record.AddTypeRef(T->getElementType());
239 Record.push_back(T->getNumElements());
240 Record.push_back(T->getVectorKind());
244 void ASTTypeWriter::VisitExtVectorType(const ExtVectorType *T) {
246 Code = TYPE_EXT_VECTOR;
249 void ASTTypeWriter::VisitFunctionType(const FunctionType *T) {
250 Record.AddTypeRef(T->getReturnType());
251 FunctionType::ExtInfo C = T->getExtInfo();
252 Record.push_back(C.getNoReturn());
253 Record.push_back(C.getHasRegParm());
254 Record.push_back(C.getRegParm());
255 // FIXME: need to stabilize encoding of calling convention...
256 Record.push_back(C.getCC());
257 Record.push_back(C.getProducesResult());
258 Record.push_back(C.getNoCallerSavedRegs());
260 if (C.getHasRegParm() || C.getRegParm() || C.getProducesResult())
264 void ASTTypeWriter::VisitFunctionNoProtoType(const FunctionNoProtoType *T) {
265 VisitFunctionType(T);
266 Code = TYPE_FUNCTION_NO_PROTO;
269 static void addExceptionSpec(const FunctionProtoType *T,
270 ASTRecordWriter &Record) {
271 Record.push_back(T->getExceptionSpecType());
272 if (T->getExceptionSpecType() == EST_Dynamic) {
273 Record.push_back(T->getNumExceptions());
274 for (unsigned I = 0, N = T->getNumExceptions(); I != N; ++I)
275 Record.AddTypeRef(T->getExceptionType(I));
276 } else if (T->getExceptionSpecType() == EST_ComputedNoexcept) {
277 Record.AddStmt(T->getNoexceptExpr());
278 } else if (T->getExceptionSpecType() == EST_Uninstantiated) {
279 Record.AddDeclRef(T->getExceptionSpecDecl());
280 Record.AddDeclRef(T->getExceptionSpecTemplate());
281 } else if (T->getExceptionSpecType() == EST_Unevaluated) {
282 Record.AddDeclRef(T->getExceptionSpecDecl());
286 void ASTTypeWriter::VisitFunctionProtoType(const FunctionProtoType *T) {
287 VisitFunctionType(T);
289 Record.push_back(T->isVariadic());
290 Record.push_back(T->hasTrailingReturn());
291 Record.push_back(T->getTypeQuals());
292 Record.push_back(static_cast<unsigned>(T->getRefQualifier()));
293 addExceptionSpec(T, Record);
295 Record.push_back(T->getNumParams());
296 for (unsigned I = 0, N = T->getNumParams(); I != N; ++I)
297 Record.AddTypeRef(T->getParamType(I));
299 if (T->hasExtParameterInfos()) {
300 for (unsigned I = 0, N = T->getNumParams(); I != N; ++I)
301 Record.push_back(T->getExtParameterInfo(I).getOpaqueValue());
304 if (T->isVariadic() || T->hasTrailingReturn() || T->getTypeQuals() ||
305 T->getRefQualifier() || T->getExceptionSpecType() != EST_None ||
306 T->hasExtParameterInfos())
309 Code = TYPE_FUNCTION_PROTO;
312 void ASTTypeWriter::VisitUnresolvedUsingType(const UnresolvedUsingType *T) {
313 Record.AddDeclRef(T->getDecl());
314 Code = TYPE_UNRESOLVED_USING;
317 void ASTTypeWriter::VisitTypedefType(const TypedefType *T) {
318 Record.AddDeclRef(T->getDecl());
319 assert(!T->isCanonicalUnqualified() && "Invalid typedef ?");
320 Record.AddTypeRef(T->getCanonicalTypeInternal());
324 void ASTTypeWriter::VisitTypeOfExprType(const TypeOfExprType *T) {
325 Record.AddStmt(T->getUnderlyingExpr());
326 Code = TYPE_TYPEOF_EXPR;
329 void ASTTypeWriter::VisitTypeOfType(const TypeOfType *T) {
330 Record.AddTypeRef(T->getUnderlyingType());
334 void ASTTypeWriter::VisitDecltypeType(const DecltypeType *T) {
335 Record.AddTypeRef(T->getUnderlyingType());
336 Record.AddStmt(T->getUnderlyingExpr());
337 Code = TYPE_DECLTYPE;
340 void ASTTypeWriter::VisitUnaryTransformType(const UnaryTransformType *T) {
341 Record.AddTypeRef(T->getBaseType());
342 Record.AddTypeRef(T->getUnderlyingType());
343 Record.push_back(T->getUTTKind());
344 Code = TYPE_UNARY_TRANSFORM;
347 void ASTTypeWriter::VisitAutoType(const AutoType *T) {
348 Record.AddTypeRef(T->getDeducedType());
349 Record.push_back((unsigned)T->getKeyword());
350 if (T->getDeducedType().isNull())
351 Record.push_back(T->isDependentType());
355 void ASTTypeWriter::VisitDeducedTemplateSpecializationType(
356 const DeducedTemplateSpecializationType *T) {
357 Record.AddTemplateName(T->getTemplateName());
358 Record.AddTypeRef(T->getDeducedType());
359 if (T->getDeducedType().isNull())
360 Record.push_back(T->isDependentType());
361 Code = TYPE_DEDUCED_TEMPLATE_SPECIALIZATION;
364 void ASTTypeWriter::VisitTagType(const TagType *T) {
365 Record.push_back(T->isDependentType());
366 Record.AddDeclRef(T->getDecl()->getCanonicalDecl());
367 assert(!T->isBeingDefined() &&
368 "Cannot serialize in the middle of a type definition");
371 void ASTTypeWriter::VisitRecordType(const RecordType *T) {
376 void ASTTypeWriter::VisitEnumType(const EnumType *T) {
381 void ASTTypeWriter::VisitAttributedType(const AttributedType *T) {
382 Record.AddTypeRef(T->getModifiedType());
383 Record.AddTypeRef(T->getEquivalentType());
384 Record.push_back(T->getAttrKind());
385 Code = TYPE_ATTRIBUTED;
389 ASTTypeWriter::VisitSubstTemplateTypeParmType(
390 const SubstTemplateTypeParmType *T) {
391 Record.AddTypeRef(QualType(T->getReplacedParameter(), 0));
392 Record.AddTypeRef(T->getReplacementType());
393 Code = TYPE_SUBST_TEMPLATE_TYPE_PARM;
397 ASTTypeWriter::VisitSubstTemplateTypeParmPackType(
398 const SubstTemplateTypeParmPackType *T) {
399 Record.AddTypeRef(QualType(T->getReplacedParameter(), 0));
400 Record.AddTemplateArgument(T->getArgumentPack());
401 Code = TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK;
405 ASTTypeWriter::VisitTemplateSpecializationType(
406 const TemplateSpecializationType *T) {
407 Record.push_back(T->isDependentType());
408 Record.AddTemplateName(T->getTemplateName());
409 Record.push_back(T->getNumArgs());
410 for (const auto &ArgI : *T)
411 Record.AddTemplateArgument(ArgI);
412 Record.AddTypeRef(T->isTypeAlias() ? T->getAliasedType()
413 : T->isCanonicalUnqualified()
415 : T->getCanonicalTypeInternal());
416 Code = TYPE_TEMPLATE_SPECIALIZATION;
420 ASTTypeWriter::VisitDependentSizedArrayType(const DependentSizedArrayType *T) {
422 Record.AddStmt(T->getSizeExpr());
423 Record.AddSourceRange(T->getBracketsRange());
424 Code = TYPE_DEPENDENT_SIZED_ARRAY;
428 ASTTypeWriter::VisitDependentSizedExtVectorType(
429 const DependentSizedExtVectorType *T) {
430 Record.AddTypeRef(T->getElementType());
431 Record.AddStmt(T->getSizeExpr());
432 Record.AddSourceLocation(T->getAttributeLoc());
433 Code = TYPE_DEPENDENT_SIZED_EXT_VECTOR;
437 ASTTypeWriter::VisitTemplateTypeParmType(const TemplateTypeParmType *T) {
438 Record.push_back(T->getDepth());
439 Record.push_back(T->getIndex());
440 Record.push_back(T->isParameterPack());
441 Record.AddDeclRef(T->getDecl());
442 Code = TYPE_TEMPLATE_TYPE_PARM;
446 ASTTypeWriter::VisitDependentNameType(const DependentNameType *T) {
447 Record.push_back(T->getKeyword());
448 Record.AddNestedNameSpecifier(T->getQualifier());
449 Record.AddIdentifierRef(T->getIdentifier());
451 T->isCanonicalUnqualified() ? QualType() : T->getCanonicalTypeInternal());
452 Code = TYPE_DEPENDENT_NAME;
456 ASTTypeWriter::VisitDependentTemplateSpecializationType(
457 const DependentTemplateSpecializationType *T) {
458 Record.push_back(T->getKeyword());
459 Record.AddNestedNameSpecifier(T->getQualifier());
460 Record.AddIdentifierRef(T->getIdentifier());
461 Record.push_back(T->getNumArgs());
462 for (const auto &I : *T)
463 Record.AddTemplateArgument(I);
464 Code = TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION;
467 void ASTTypeWriter::VisitPackExpansionType(const PackExpansionType *T) {
468 Record.AddTypeRef(T->getPattern());
469 if (Optional<unsigned> NumExpansions = T->getNumExpansions())
470 Record.push_back(*NumExpansions + 1);
473 Code = TYPE_PACK_EXPANSION;
476 void ASTTypeWriter::VisitParenType(const ParenType *T) {
477 Record.AddTypeRef(T->getInnerType());
481 void ASTTypeWriter::VisitElaboratedType(const ElaboratedType *T) {
482 Record.push_back(T->getKeyword());
483 Record.AddNestedNameSpecifier(T->getQualifier());
484 Record.AddTypeRef(T->getNamedType());
485 Code = TYPE_ELABORATED;
488 void ASTTypeWriter::VisitInjectedClassNameType(const InjectedClassNameType *T) {
489 Record.AddDeclRef(T->getDecl()->getCanonicalDecl());
490 Record.AddTypeRef(T->getInjectedSpecializationType());
491 Code = TYPE_INJECTED_CLASS_NAME;
494 void ASTTypeWriter::VisitObjCInterfaceType(const ObjCInterfaceType *T) {
495 Record.AddDeclRef(T->getDecl()->getCanonicalDecl());
496 Code = TYPE_OBJC_INTERFACE;
499 void ASTTypeWriter::VisitObjCTypeParamType(const ObjCTypeParamType *T) {
500 Record.AddDeclRef(T->getDecl());
501 Record.push_back(T->getNumProtocols());
502 for (const auto *I : T->quals())
503 Record.AddDeclRef(I);
504 Code = TYPE_OBJC_TYPE_PARAM;
507 void ASTTypeWriter::VisitObjCObjectType(const ObjCObjectType *T) {
508 Record.AddTypeRef(T->getBaseType());
509 Record.push_back(T->getTypeArgsAsWritten().size());
510 for (auto TypeArg : T->getTypeArgsAsWritten())
511 Record.AddTypeRef(TypeArg);
512 Record.push_back(T->getNumProtocols());
513 for (const auto *I : T->quals())
514 Record.AddDeclRef(I);
515 Record.push_back(T->isKindOfTypeAsWritten());
516 Code = TYPE_OBJC_OBJECT;
520 ASTTypeWriter::VisitObjCObjectPointerType(const ObjCObjectPointerType *T) {
521 Record.AddTypeRef(T->getPointeeType());
522 Code = TYPE_OBJC_OBJECT_POINTER;
526 ASTTypeWriter::VisitAtomicType(const AtomicType *T) {
527 Record.AddTypeRef(T->getValueType());
532 ASTTypeWriter::VisitPipeType(const PipeType *T) {
533 Record.AddTypeRef(T->getElementType());
534 Record.push_back(T->isReadOnly());
540 class TypeLocWriter : public TypeLocVisitor<TypeLocWriter> {
541 ASTRecordWriter &Record;
544 TypeLocWriter(ASTRecordWriter &Record)
547 #define ABSTRACT_TYPELOC(CLASS, PARENT)
548 #define TYPELOC(CLASS, PARENT) \
549 void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc);
550 #include "clang/AST/TypeLocNodes.def"
552 void VisitArrayTypeLoc(ArrayTypeLoc TyLoc);
553 void VisitFunctionTypeLoc(FunctionTypeLoc TyLoc);
556 } // end anonymous namespace
558 void TypeLocWriter::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) {
562 void TypeLocWriter::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) {
563 Record.AddSourceLocation(TL.getBuiltinLoc());
564 if (TL.needsExtraLocalData()) {
565 Record.push_back(TL.getWrittenTypeSpec());
566 Record.push_back(TL.getWrittenSignSpec());
567 Record.push_back(TL.getWrittenWidthSpec());
568 Record.push_back(TL.hasModeAttr());
572 void TypeLocWriter::VisitComplexTypeLoc(ComplexTypeLoc TL) {
573 Record.AddSourceLocation(TL.getNameLoc());
576 void TypeLocWriter::VisitPointerTypeLoc(PointerTypeLoc TL) {
577 Record.AddSourceLocation(TL.getStarLoc());
580 void TypeLocWriter::VisitDecayedTypeLoc(DecayedTypeLoc TL) {
584 void TypeLocWriter::VisitAdjustedTypeLoc(AdjustedTypeLoc TL) {
588 void TypeLocWriter::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) {
589 Record.AddSourceLocation(TL.getCaretLoc());
592 void TypeLocWriter::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) {
593 Record.AddSourceLocation(TL.getAmpLoc());
596 void TypeLocWriter::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) {
597 Record.AddSourceLocation(TL.getAmpAmpLoc());
600 void TypeLocWriter::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) {
601 Record.AddSourceLocation(TL.getStarLoc());
602 Record.AddTypeSourceInfo(TL.getClassTInfo());
605 void TypeLocWriter::VisitArrayTypeLoc(ArrayTypeLoc TL) {
606 Record.AddSourceLocation(TL.getLBracketLoc());
607 Record.AddSourceLocation(TL.getRBracketLoc());
608 Record.push_back(TL.getSizeExpr() ? 1 : 0);
609 if (TL.getSizeExpr())
610 Record.AddStmt(TL.getSizeExpr());
613 void TypeLocWriter::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) {
614 VisitArrayTypeLoc(TL);
617 void TypeLocWriter::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) {
618 VisitArrayTypeLoc(TL);
621 void TypeLocWriter::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) {
622 VisitArrayTypeLoc(TL);
625 void TypeLocWriter::VisitDependentSizedArrayTypeLoc(
626 DependentSizedArrayTypeLoc TL) {
627 VisitArrayTypeLoc(TL);
630 void TypeLocWriter::VisitDependentSizedExtVectorTypeLoc(
631 DependentSizedExtVectorTypeLoc TL) {
632 Record.AddSourceLocation(TL.getNameLoc());
635 void TypeLocWriter::VisitVectorTypeLoc(VectorTypeLoc TL) {
636 Record.AddSourceLocation(TL.getNameLoc());
639 void TypeLocWriter::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) {
640 Record.AddSourceLocation(TL.getNameLoc());
643 void TypeLocWriter::VisitFunctionTypeLoc(FunctionTypeLoc TL) {
644 Record.AddSourceLocation(TL.getLocalRangeBegin());
645 Record.AddSourceLocation(TL.getLParenLoc());
646 Record.AddSourceLocation(TL.getRParenLoc());
647 Record.AddSourceRange(TL.getExceptionSpecRange());
648 Record.AddSourceLocation(TL.getLocalRangeEnd());
649 for (unsigned i = 0, e = TL.getNumParams(); i != e; ++i)
650 Record.AddDeclRef(TL.getParam(i));
652 void TypeLocWriter::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) {
653 VisitFunctionTypeLoc(TL);
655 void TypeLocWriter::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) {
656 VisitFunctionTypeLoc(TL);
658 void TypeLocWriter::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) {
659 Record.AddSourceLocation(TL.getNameLoc());
661 void TypeLocWriter::VisitTypedefTypeLoc(TypedefTypeLoc TL) {
662 Record.AddSourceLocation(TL.getNameLoc());
664 void TypeLocWriter::VisitObjCTypeParamTypeLoc(ObjCTypeParamTypeLoc TL) {
665 if (TL.getNumProtocols()) {
666 Record.AddSourceLocation(TL.getProtocolLAngleLoc());
667 Record.AddSourceLocation(TL.getProtocolRAngleLoc());
669 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
670 Record.AddSourceLocation(TL.getProtocolLoc(i));
672 void TypeLocWriter::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) {
673 Record.AddSourceLocation(TL.getTypeofLoc());
674 Record.AddSourceLocation(TL.getLParenLoc());
675 Record.AddSourceLocation(TL.getRParenLoc());
678 void TypeLocWriter::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) {
679 Record.AddSourceLocation(TL.getTypeofLoc());
680 Record.AddSourceLocation(TL.getLParenLoc());
681 Record.AddSourceLocation(TL.getRParenLoc());
682 Record.AddTypeSourceInfo(TL.getUnderlyingTInfo());
685 void TypeLocWriter::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) {
686 Record.AddSourceLocation(TL.getNameLoc());
689 void TypeLocWriter::VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) {
690 Record.AddSourceLocation(TL.getKWLoc());
691 Record.AddSourceLocation(TL.getLParenLoc());
692 Record.AddSourceLocation(TL.getRParenLoc());
693 Record.AddTypeSourceInfo(TL.getUnderlyingTInfo());
696 void TypeLocWriter::VisitAutoTypeLoc(AutoTypeLoc TL) {
697 Record.AddSourceLocation(TL.getNameLoc());
700 void TypeLocWriter::VisitDeducedTemplateSpecializationTypeLoc(
701 DeducedTemplateSpecializationTypeLoc TL) {
702 Record.AddSourceLocation(TL.getTemplateNameLoc());
705 void TypeLocWriter::VisitRecordTypeLoc(RecordTypeLoc TL) {
706 Record.AddSourceLocation(TL.getNameLoc());
709 void TypeLocWriter::VisitEnumTypeLoc(EnumTypeLoc TL) {
710 Record.AddSourceLocation(TL.getNameLoc());
713 void TypeLocWriter::VisitAttributedTypeLoc(AttributedTypeLoc TL) {
714 Record.AddSourceLocation(TL.getAttrNameLoc());
715 if (TL.hasAttrOperand()) {
716 SourceRange range = TL.getAttrOperandParensRange();
717 Record.AddSourceLocation(range.getBegin());
718 Record.AddSourceLocation(range.getEnd());
720 if (TL.hasAttrExprOperand()) {
721 Expr *operand = TL.getAttrExprOperand();
722 Record.push_back(operand ? 1 : 0);
723 if (operand) Record.AddStmt(operand);
724 } else if (TL.hasAttrEnumOperand()) {
725 Record.AddSourceLocation(TL.getAttrEnumOperandLoc());
729 void TypeLocWriter::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) {
730 Record.AddSourceLocation(TL.getNameLoc());
733 void TypeLocWriter::VisitSubstTemplateTypeParmTypeLoc(
734 SubstTemplateTypeParmTypeLoc TL) {
735 Record.AddSourceLocation(TL.getNameLoc());
738 void TypeLocWriter::VisitSubstTemplateTypeParmPackTypeLoc(
739 SubstTemplateTypeParmPackTypeLoc TL) {
740 Record.AddSourceLocation(TL.getNameLoc());
743 void TypeLocWriter::VisitTemplateSpecializationTypeLoc(
744 TemplateSpecializationTypeLoc TL) {
745 Record.AddSourceLocation(TL.getTemplateKeywordLoc());
746 Record.AddSourceLocation(TL.getTemplateNameLoc());
747 Record.AddSourceLocation(TL.getLAngleLoc());
748 Record.AddSourceLocation(TL.getRAngleLoc());
749 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i)
750 Record.AddTemplateArgumentLocInfo(TL.getArgLoc(i).getArgument().getKind(),
751 TL.getArgLoc(i).getLocInfo());
754 void TypeLocWriter::VisitParenTypeLoc(ParenTypeLoc TL) {
755 Record.AddSourceLocation(TL.getLParenLoc());
756 Record.AddSourceLocation(TL.getRParenLoc());
759 void TypeLocWriter::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) {
760 Record.AddSourceLocation(TL.getElaboratedKeywordLoc());
761 Record.AddNestedNameSpecifierLoc(TL.getQualifierLoc());
764 void TypeLocWriter::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) {
765 Record.AddSourceLocation(TL.getNameLoc());
768 void TypeLocWriter::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) {
769 Record.AddSourceLocation(TL.getElaboratedKeywordLoc());
770 Record.AddNestedNameSpecifierLoc(TL.getQualifierLoc());
771 Record.AddSourceLocation(TL.getNameLoc());
774 void TypeLocWriter::VisitDependentTemplateSpecializationTypeLoc(
775 DependentTemplateSpecializationTypeLoc TL) {
776 Record.AddSourceLocation(TL.getElaboratedKeywordLoc());
777 Record.AddNestedNameSpecifierLoc(TL.getQualifierLoc());
778 Record.AddSourceLocation(TL.getTemplateKeywordLoc());
779 Record.AddSourceLocation(TL.getTemplateNameLoc());
780 Record.AddSourceLocation(TL.getLAngleLoc());
781 Record.AddSourceLocation(TL.getRAngleLoc());
782 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I)
783 Record.AddTemplateArgumentLocInfo(TL.getArgLoc(I).getArgument().getKind(),
784 TL.getArgLoc(I).getLocInfo());
787 void TypeLocWriter::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) {
788 Record.AddSourceLocation(TL.getEllipsisLoc());
791 void TypeLocWriter::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) {
792 Record.AddSourceLocation(TL.getNameLoc());
795 void TypeLocWriter::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) {
796 Record.push_back(TL.hasBaseTypeAsWritten());
797 Record.AddSourceLocation(TL.getTypeArgsLAngleLoc());
798 Record.AddSourceLocation(TL.getTypeArgsRAngleLoc());
799 for (unsigned i = 0, e = TL.getNumTypeArgs(); i != e; ++i)
800 Record.AddTypeSourceInfo(TL.getTypeArgTInfo(i));
801 Record.AddSourceLocation(TL.getProtocolLAngleLoc());
802 Record.AddSourceLocation(TL.getProtocolRAngleLoc());
803 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
804 Record.AddSourceLocation(TL.getProtocolLoc(i));
807 void TypeLocWriter::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) {
808 Record.AddSourceLocation(TL.getStarLoc());
811 void TypeLocWriter::VisitAtomicTypeLoc(AtomicTypeLoc TL) {
812 Record.AddSourceLocation(TL.getKWLoc());
813 Record.AddSourceLocation(TL.getLParenLoc());
814 Record.AddSourceLocation(TL.getRParenLoc());
817 void TypeLocWriter::VisitPipeTypeLoc(PipeTypeLoc TL) {
818 Record.AddSourceLocation(TL.getKWLoc());
821 void ASTWriter::WriteTypeAbbrevs() {
822 using namespace llvm;
824 std::shared_ptr<BitCodeAbbrev> Abv;
826 // Abbreviation for TYPE_EXT_QUAL
827 Abv = std::make_shared<BitCodeAbbrev>();
828 Abv->Add(BitCodeAbbrevOp(serialization::TYPE_EXT_QUAL));
829 Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Type
830 Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 3)); // Quals
831 TypeExtQualAbbrev = Stream.EmitAbbrev(std::move(Abv));
833 // Abbreviation for TYPE_FUNCTION_PROTO
834 Abv = std::make_shared<BitCodeAbbrev>();
835 Abv->Add(BitCodeAbbrevOp(serialization::TYPE_FUNCTION_PROTO));
837 Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ReturnType
838 Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // NoReturn
839 Abv->Add(BitCodeAbbrevOp(0)); // HasRegParm
840 Abv->Add(BitCodeAbbrevOp(0)); // RegParm
841 Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // CC
842 Abv->Add(BitCodeAbbrevOp(0)); // ProducesResult
843 Abv->Add(BitCodeAbbrevOp(0)); // NoCallerSavedRegs
845 Abv->Add(BitCodeAbbrevOp(0)); // IsVariadic
846 Abv->Add(BitCodeAbbrevOp(0)); // HasTrailingReturn
847 Abv->Add(BitCodeAbbrevOp(0)); // TypeQuals
848 Abv->Add(BitCodeAbbrevOp(0)); // RefQualifier
849 Abv->Add(BitCodeAbbrevOp(EST_None)); // ExceptionSpec
850 Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // NumParams
851 Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
852 Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Params
853 TypeFunctionProtoAbbrev = Stream.EmitAbbrev(std::move(Abv));
856 //===----------------------------------------------------------------------===//
857 // ASTWriter Implementation
858 //===----------------------------------------------------------------------===//
860 static void EmitBlockID(unsigned ID, const char *Name,
861 llvm::BitstreamWriter &Stream,
862 ASTWriter::RecordDataImpl &Record) {
864 Record.push_back(ID);
865 Stream.EmitRecord(llvm::bitc::BLOCKINFO_CODE_SETBID, Record);
867 // Emit the block name if present.
868 if (!Name || Name[0] == 0)
872 Record.push_back(*Name++);
873 Stream.EmitRecord(llvm::bitc::BLOCKINFO_CODE_BLOCKNAME, Record);
876 static void EmitRecordID(unsigned ID, const char *Name,
877 llvm::BitstreamWriter &Stream,
878 ASTWriter::RecordDataImpl &Record) {
880 Record.push_back(ID);
882 Record.push_back(*Name++);
883 Stream.EmitRecord(llvm::bitc::BLOCKINFO_CODE_SETRECORDNAME, Record);
886 static void AddStmtsExprs(llvm::BitstreamWriter &Stream,
887 ASTWriter::RecordDataImpl &Record) {
888 #define RECORD(X) EmitRecordID(X, #X, Stream, Record)
890 RECORD(STMT_NULL_PTR);
891 RECORD(STMT_REF_PTR);
893 RECORD(STMT_COMPOUND);
895 RECORD(STMT_DEFAULT);
897 RECORD(STMT_ATTRIBUTED);
904 RECORD(STMT_INDIRECT_GOTO);
905 RECORD(STMT_CONTINUE);
911 RECORD(EXPR_PREDEFINED);
912 RECORD(EXPR_DECL_REF);
913 RECORD(EXPR_INTEGER_LITERAL);
914 RECORD(EXPR_FLOATING_LITERAL);
915 RECORD(EXPR_IMAGINARY_LITERAL);
916 RECORD(EXPR_STRING_LITERAL);
917 RECORD(EXPR_CHARACTER_LITERAL);
919 RECORD(EXPR_PAREN_LIST);
920 RECORD(EXPR_UNARY_OPERATOR);
921 RECORD(EXPR_SIZEOF_ALIGN_OF);
922 RECORD(EXPR_ARRAY_SUBSCRIPT);
925 RECORD(EXPR_BINARY_OPERATOR);
926 RECORD(EXPR_COMPOUND_ASSIGN_OPERATOR);
927 RECORD(EXPR_CONDITIONAL_OPERATOR);
928 RECORD(EXPR_IMPLICIT_CAST);
929 RECORD(EXPR_CSTYLE_CAST);
930 RECORD(EXPR_COMPOUND_LITERAL);
931 RECORD(EXPR_EXT_VECTOR_ELEMENT);
932 RECORD(EXPR_INIT_LIST);
933 RECORD(EXPR_DESIGNATED_INIT);
934 RECORD(EXPR_DESIGNATED_INIT_UPDATE);
935 RECORD(EXPR_IMPLICIT_VALUE_INIT);
936 RECORD(EXPR_NO_INIT);
938 RECORD(EXPR_ADDR_LABEL);
941 RECORD(EXPR_GNU_NULL);
942 RECORD(EXPR_SHUFFLE_VECTOR);
944 RECORD(EXPR_GENERIC_SELECTION);
945 RECORD(EXPR_OBJC_STRING_LITERAL);
946 RECORD(EXPR_OBJC_BOXED_EXPRESSION);
947 RECORD(EXPR_OBJC_ARRAY_LITERAL);
948 RECORD(EXPR_OBJC_DICTIONARY_LITERAL);
949 RECORD(EXPR_OBJC_ENCODE);
950 RECORD(EXPR_OBJC_SELECTOR_EXPR);
951 RECORD(EXPR_OBJC_PROTOCOL_EXPR);
952 RECORD(EXPR_OBJC_IVAR_REF_EXPR);
953 RECORD(EXPR_OBJC_PROPERTY_REF_EXPR);
954 RECORD(EXPR_OBJC_KVC_REF_EXPR);
955 RECORD(EXPR_OBJC_MESSAGE_EXPR);
956 RECORD(STMT_OBJC_FOR_COLLECTION);
957 RECORD(STMT_OBJC_CATCH);
958 RECORD(STMT_OBJC_FINALLY);
959 RECORD(STMT_OBJC_AT_TRY);
960 RECORD(STMT_OBJC_AT_SYNCHRONIZED);
961 RECORD(STMT_OBJC_AT_THROW);
962 RECORD(EXPR_OBJC_BOOL_LITERAL);
963 RECORD(STMT_CXX_CATCH);
964 RECORD(STMT_CXX_TRY);
965 RECORD(STMT_CXX_FOR_RANGE);
966 RECORD(EXPR_CXX_OPERATOR_CALL);
967 RECORD(EXPR_CXX_MEMBER_CALL);
968 RECORD(EXPR_CXX_CONSTRUCT);
969 RECORD(EXPR_CXX_TEMPORARY_OBJECT);
970 RECORD(EXPR_CXX_STATIC_CAST);
971 RECORD(EXPR_CXX_DYNAMIC_CAST);
972 RECORD(EXPR_CXX_REINTERPRET_CAST);
973 RECORD(EXPR_CXX_CONST_CAST);
974 RECORD(EXPR_CXX_FUNCTIONAL_CAST);
975 RECORD(EXPR_USER_DEFINED_LITERAL);
976 RECORD(EXPR_CXX_STD_INITIALIZER_LIST);
977 RECORD(EXPR_CXX_BOOL_LITERAL);
978 RECORD(EXPR_CXX_NULL_PTR_LITERAL);
979 RECORD(EXPR_CXX_TYPEID_EXPR);
980 RECORD(EXPR_CXX_TYPEID_TYPE);
981 RECORD(EXPR_CXX_THIS);
982 RECORD(EXPR_CXX_THROW);
983 RECORD(EXPR_CXX_DEFAULT_ARG);
984 RECORD(EXPR_CXX_DEFAULT_INIT);
985 RECORD(EXPR_CXX_BIND_TEMPORARY);
986 RECORD(EXPR_CXX_SCALAR_VALUE_INIT);
987 RECORD(EXPR_CXX_NEW);
988 RECORD(EXPR_CXX_DELETE);
989 RECORD(EXPR_CXX_PSEUDO_DESTRUCTOR);
990 RECORD(EXPR_EXPR_WITH_CLEANUPS);
991 RECORD(EXPR_CXX_DEPENDENT_SCOPE_MEMBER);
992 RECORD(EXPR_CXX_DEPENDENT_SCOPE_DECL_REF);
993 RECORD(EXPR_CXX_UNRESOLVED_CONSTRUCT);
994 RECORD(EXPR_CXX_UNRESOLVED_MEMBER);
995 RECORD(EXPR_CXX_UNRESOLVED_LOOKUP);
996 RECORD(EXPR_CXX_EXPRESSION_TRAIT);
997 RECORD(EXPR_CXX_NOEXCEPT);
998 RECORD(EXPR_OPAQUE_VALUE);
999 RECORD(EXPR_BINARY_CONDITIONAL_OPERATOR);
1000 RECORD(EXPR_TYPE_TRAIT);
1001 RECORD(EXPR_ARRAY_TYPE_TRAIT);
1002 RECORD(EXPR_PACK_EXPANSION);
1003 RECORD(EXPR_SIZEOF_PACK);
1004 RECORD(EXPR_SUBST_NON_TYPE_TEMPLATE_PARM);
1005 RECORD(EXPR_SUBST_NON_TYPE_TEMPLATE_PARM_PACK);
1006 RECORD(EXPR_FUNCTION_PARM_PACK);
1007 RECORD(EXPR_MATERIALIZE_TEMPORARY);
1008 RECORD(EXPR_CUDA_KERNEL_CALL);
1009 RECORD(EXPR_CXX_UUIDOF_EXPR);
1010 RECORD(EXPR_CXX_UUIDOF_TYPE);
1011 RECORD(EXPR_LAMBDA);
1015 void ASTWriter::WriteBlockInfoBlock() {
1017 Stream.EnterBlockInfoBlock();
1019 #define BLOCK(X) EmitBlockID(X ## _ID, #X, Stream, Record)
1020 #define RECORD(X) EmitRecordID(X, #X, Stream, Record)
1023 BLOCK(CONTROL_BLOCK);
1025 RECORD(MODULE_NAME);
1026 RECORD(MODULE_DIRECTORY);
1027 RECORD(MODULE_MAP_FILE);
1029 RECORD(ORIGINAL_FILE);
1030 RECORD(ORIGINAL_PCH_DIR);
1031 RECORD(ORIGINAL_FILE_ID);
1032 RECORD(INPUT_FILE_OFFSETS);
1034 BLOCK(OPTIONS_BLOCK);
1035 RECORD(LANGUAGE_OPTIONS);
1036 RECORD(TARGET_OPTIONS);
1037 RECORD(FILE_SYSTEM_OPTIONS);
1038 RECORD(HEADER_SEARCH_OPTIONS);
1039 RECORD(PREPROCESSOR_OPTIONS);
1041 BLOCK(INPUT_FILES_BLOCK);
1044 // AST Top-Level Block.
1046 RECORD(TYPE_OFFSET);
1047 RECORD(DECL_OFFSET);
1048 RECORD(IDENTIFIER_OFFSET);
1049 RECORD(IDENTIFIER_TABLE);
1050 RECORD(EAGERLY_DESERIALIZED_DECLS);
1051 RECORD(MODULAR_CODEGEN_DECLS);
1052 RECORD(SPECIAL_TYPES);
1054 RECORD(TENTATIVE_DEFINITIONS);
1055 RECORD(SELECTOR_OFFSETS);
1056 RECORD(METHOD_POOL);
1057 RECORD(PP_COUNTER_VALUE);
1058 RECORD(SOURCE_LOCATION_OFFSETS);
1059 RECORD(SOURCE_LOCATION_PRELOADS);
1060 RECORD(EXT_VECTOR_DECLS);
1061 RECORD(UNUSED_FILESCOPED_DECLS);
1062 RECORD(PPD_ENTITIES_OFFSETS);
1063 RECORD(VTABLE_USES);
1064 RECORD(REFERENCED_SELECTOR_POOL);
1065 RECORD(TU_UPDATE_LEXICAL);
1066 RECORD(SEMA_DECL_REFS);
1067 RECORD(WEAK_UNDECLARED_IDENTIFIERS);
1068 RECORD(PENDING_IMPLICIT_INSTANTIATIONS);
1069 RECORD(UPDATE_VISIBLE);
1070 RECORD(DECL_UPDATE_OFFSETS);
1071 RECORD(DECL_UPDATES);
1072 RECORD(CUDA_SPECIAL_DECL_REFS);
1073 RECORD(HEADER_SEARCH_TABLE);
1074 RECORD(FP_PRAGMA_OPTIONS);
1075 RECORD(OPENCL_EXTENSIONS);
1076 RECORD(OPENCL_EXTENSION_TYPES);
1077 RECORD(OPENCL_EXTENSION_DECLS);
1078 RECORD(DELEGATING_CTORS);
1079 RECORD(KNOWN_NAMESPACES);
1080 RECORD(MODULE_OFFSET_MAP);
1081 RECORD(SOURCE_MANAGER_LINE_TABLE);
1082 RECORD(OBJC_CATEGORIES_MAP);
1083 RECORD(FILE_SORTED_DECLS);
1084 RECORD(IMPORTED_MODULES);
1085 RECORD(OBJC_CATEGORIES);
1086 RECORD(MACRO_OFFSET);
1087 RECORD(INTERESTING_IDENTIFIERS);
1088 RECORD(UNDEFINED_BUT_USED);
1089 RECORD(LATE_PARSED_TEMPLATE);
1090 RECORD(OPTIMIZE_PRAGMA_OPTIONS);
1091 RECORD(MSSTRUCT_PRAGMA_OPTIONS);
1092 RECORD(POINTERS_TO_MEMBERS_PRAGMA_OPTIONS);
1093 RECORD(UNUSED_LOCAL_TYPEDEF_NAME_CANDIDATES);
1094 RECORD(DELETE_EXPRS_TO_ANALYZE);
1095 RECORD(CUDA_PRAGMA_FORCE_HOST_DEVICE_DEPTH);
1096 RECORD(PP_CONDITIONAL_STACK);
1098 // SourceManager Block.
1099 BLOCK(SOURCE_MANAGER_BLOCK);
1100 RECORD(SM_SLOC_FILE_ENTRY);
1101 RECORD(SM_SLOC_BUFFER_ENTRY);
1102 RECORD(SM_SLOC_BUFFER_BLOB);
1103 RECORD(SM_SLOC_BUFFER_BLOB_COMPRESSED);
1104 RECORD(SM_SLOC_EXPANSION_ENTRY);
1106 // Preprocessor Block.
1107 BLOCK(PREPROCESSOR_BLOCK);
1108 RECORD(PP_MACRO_DIRECTIVE_HISTORY);
1109 RECORD(PP_MACRO_FUNCTION_LIKE);
1110 RECORD(PP_MACRO_OBJECT_LIKE);
1111 RECORD(PP_MODULE_MACRO);
1115 BLOCK(SUBMODULE_BLOCK);
1116 RECORD(SUBMODULE_METADATA);
1117 RECORD(SUBMODULE_DEFINITION);
1118 RECORD(SUBMODULE_UMBRELLA_HEADER);
1119 RECORD(SUBMODULE_HEADER);
1120 RECORD(SUBMODULE_TOPHEADER);
1121 RECORD(SUBMODULE_UMBRELLA_DIR);
1122 RECORD(SUBMODULE_IMPORTS);
1123 RECORD(SUBMODULE_EXPORTS);
1124 RECORD(SUBMODULE_REQUIRES);
1125 RECORD(SUBMODULE_EXCLUDED_HEADER);
1126 RECORD(SUBMODULE_LINK_LIBRARY);
1127 RECORD(SUBMODULE_CONFIG_MACRO);
1128 RECORD(SUBMODULE_CONFLICT);
1129 RECORD(SUBMODULE_PRIVATE_HEADER);
1130 RECORD(SUBMODULE_TEXTUAL_HEADER);
1131 RECORD(SUBMODULE_PRIVATE_TEXTUAL_HEADER);
1132 RECORD(SUBMODULE_INITIALIZERS);
1135 BLOCK(COMMENTS_BLOCK);
1136 RECORD(COMMENTS_RAW_COMMENT);
1138 // Decls and Types block.
1139 BLOCK(DECLTYPES_BLOCK);
1140 RECORD(TYPE_EXT_QUAL);
1141 RECORD(TYPE_COMPLEX);
1142 RECORD(TYPE_POINTER);
1143 RECORD(TYPE_BLOCK_POINTER);
1144 RECORD(TYPE_LVALUE_REFERENCE);
1145 RECORD(TYPE_RVALUE_REFERENCE);
1146 RECORD(TYPE_MEMBER_POINTER);
1147 RECORD(TYPE_CONSTANT_ARRAY);
1148 RECORD(TYPE_INCOMPLETE_ARRAY);
1149 RECORD(TYPE_VARIABLE_ARRAY);
1150 RECORD(TYPE_VECTOR);
1151 RECORD(TYPE_EXT_VECTOR);
1152 RECORD(TYPE_FUNCTION_NO_PROTO);
1153 RECORD(TYPE_FUNCTION_PROTO);
1154 RECORD(TYPE_TYPEDEF);
1155 RECORD(TYPE_TYPEOF_EXPR);
1156 RECORD(TYPE_TYPEOF);
1157 RECORD(TYPE_RECORD);
1159 RECORD(TYPE_OBJC_INTERFACE);
1160 RECORD(TYPE_OBJC_OBJECT_POINTER);
1161 RECORD(TYPE_DECLTYPE);
1162 RECORD(TYPE_ELABORATED);
1163 RECORD(TYPE_SUBST_TEMPLATE_TYPE_PARM);
1164 RECORD(TYPE_UNRESOLVED_USING);
1165 RECORD(TYPE_INJECTED_CLASS_NAME);
1166 RECORD(TYPE_OBJC_OBJECT);
1167 RECORD(TYPE_TEMPLATE_TYPE_PARM);
1168 RECORD(TYPE_TEMPLATE_SPECIALIZATION);
1169 RECORD(TYPE_DEPENDENT_NAME);
1170 RECORD(TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION);
1171 RECORD(TYPE_DEPENDENT_SIZED_ARRAY);
1173 RECORD(TYPE_PACK_EXPANSION);
1174 RECORD(TYPE_ATTRIBUTED);
1175 RECORD(TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK);
1177 RECORD(TYPE_UNARY_TRANSFORM);
1178 RECORD(TYPE_ATOMIC);
1179 RECORD(TYPE_DECAYED);
1180 RECORD(TYPE_ADJUSTED);
1181 RECORD(TYPE_OBJC_TYPE_PARAM);
1182 RECORD(LOCAL_REDECLARATIONS);
1183 RECORD(DECL_TYPEDEF);
1184 RECORD(DECL_TYPEALIAS);
1186 RECORD(DECL_RECORD);
1187 RECORD(DECL_ENUM_CONSTANT);
1188 RECORD(DECL_FUNCTION);
1189 RECORD(DECL_OBJC_METHOD);
1190 RECORD(DECL_OBJC_INTERFACE);
1191 RECORD(DECL_OBJC_PROTOCOL);
1192 RECORD(DECL_OBJC_IVAR);
1193 RECORD(DECL_OBJC_AT_DEFS_FIELD);
1194 RECORD(DECL_OBJC_CATEGORY);
1195 RECORD(DECL_OBJC_CATEGORY_IMPL);
1196 RECORD(DECL_OBJC_IMPLEMENTATION);
1197 RECORD(DECL_OBJC_COMPATIBLE_ALIAS);
1198 RECORD(DECL_OBJC_PROPERTY);
1199 RECORD(DECL_OBJC_PROPERTY_IMPL);
1201 RECORD(DECL_MS_PROPERTY);
1203 RECORD(DECL_IMPLICIT_PARAM);
1204 RECORD(DECL_PARM_VAR);
1205 RECORD(DECL_FILE_SCOPE_ASM);
1207 RECORD(DECL_CONTEXT_LEXICAL);
1208 RECORD(DECL_CONTEXT_VISIBLE);
1209 RECORD(DECL_NAMESPACE);
1210 RECORD(DECL_NAMESPACE_ALIAS);
1212 RECORD(DECL_USING_SHADOW);
1213 RECORD(DECL_USING_DIRECTIVE);
1214 RECORD(DECL_UNRESOLVED_USING_VALUE);
1215 RECORD(DECL_UNRESOLVED_USING_TYPENAME);
1216 RECORD(DECL_LINKAGE_SPEC);
1217 RECORD(DECL_CXX_RECORD);
1218 RECORD(DECL_CXX_METHOD);
1219 RECORD(DECL_CXX_CONSTRUCTOR);
1220 RECORD(DECL_CXX_INHERITED_CONSTRUCTOR);
1221 RECORD(DECL_CXX_DESTRUCTOR);
1222 RECORD(DECL_CXX_CONVERSION);
1223 RECORD(DECL_ACCESS_SPEC);
1224 RECORD(DECL_FRIEND);
1225 RECORD(DECL_FRIEND_TEMPLATE);
1226 RECORD(DECL_CLASS_TEMPLATE);
1227 RECORD(DECL_CLASS_TEMPLATE_SPECIALIZATION);
1228 RECORD(DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION);
1229 RECORD(DECL_VAR_TEMPLATE);
1230 RECORD(DECL_VAR_TEMPLATE_SPECIALIZATION);
1231 RECORD(DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION);
1232 RECORD(DECL_FUNCTION_TEMPLATE);
1233 RECORD(DECL_TEMPLATE_TYPE_PARM);
1234 RECORD(DECL_NON_TYPE_TEMPLATE_PARM);
1235 RECORD(DECL_TEMPLATE_TEMPLATE_PARM);
1236 RECORD(DECL_TYPE_ALIAS_TEMPLATE);
1237 RECORD(DECL_STATIC_ASSERT);
1238 RECORD(DECL_CXX_BASE_SPECIFIERS);
1239 RECORD(DECL_CXX_CTOR_INITIALIZERS);
1240 RECORD(DECL_INDIRECTFIELD);
1241 RECORD(DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK);
1242 RECORD(DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK);
1243 RECORD(DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION);
1244 RECORD(DECL_IMPORT);
1245 RECORD(DECL_OMP_THREADPRIVATE);
1247 RECORD(DECL_OBJC_TYPE_PARAM);
1248 RECORD(DECL_OMP_CAPTUREDEXPR);
1249 RECORD(DECL_PRAGMA_COMMENT);
1250 RECORD(DECL_PRAGMA_DETECT_MISMATCH);
1251 RECORD(DECL_OMP_DECLARE_REDUCTION);
1253 // Statements and Exprs can occur in the Decls and Types block.
1254 AddStmtsExprs(Stream, Record);
1256 BLOCK(PREPROCESSOR_DETAIL_BLOCK);
1257 RECORD(PPD_MACRO_EXPANSION);
1258 RECORD(PPD_MACRO_DEFINITION);
1259 RECORD(PPD_INCLUSION_DIRECTIVE);
1261 // Decls and Types block.
1262 BLOCK(EXTENSION_BLOCK);
1263 RECORD(EXTENSION_METADATA);
1265 BLOCK(UNHASHED_CONTROL_BLOCK);
1267 RECORD(DIAGNOSTIC_OPTIONS);
1268 RECORD(DIAG_PRAGMA_MAPPINGS);
1275 /// \brief Prepares a path for being written to an AST file by converting it
1276 /// to an absolute path and removing nested './'s.
1278 /// \return \c true if the path was changed.
1279 static bool cleanPathForOutput(FileManager &FileMgr,
1280 SmallVectorImpl<char> &Path) {
1281 bool Changed = FileMgr.makeAbsolutePath(Path);
1282 return Changed | llvm::sys::path::remove_dots(Path);
1285 /// \brief Adjusts the given filename to only write out the portion of the
1286 /// filename that is not part of the system root directory.
1288 /// \param Filename the file name to adjust.
1290 /// \param BaseDir When non-NULL, the PCH file is a relocatable AST file and
1291 /// the returned filename will be adjusted by this root directory.
1293 /// \returns either the original filename (if it needs no adjustment) or the
1294 /// adjusted filename (which points into the @p Filename parameter).
1296 adjustFilenameForRelocatableAST(const char *Filename, StringRef BaseDir) {
1297 assert(Filename && "No file name to adjust?");
1299 if (BaseDir.empty())
1302 // Verify that the filename and the system root have the same prefix.
1304 for (; Filename[Pos] && Pos < BaseDir.size(); ++Pos)
1305 if (Filename[Pos] != BaseDir[Pos])
1306 return Filename; // Prefixes don't match.
1308 // We hit the end of the filename before we hit the end of the system root.
1312 // If there's not a path separator at the end of the base directory nor
1313 // immediately after it, then this isn't within the base directory.
1314 if (!llvm::sys::path::is_separator(Filename[Pos])) {
1315 if (!llvm::sys::path::is_separator(BaseDir.back()))
1318 // If the file name has a '/' at the current position, skip over the '/'.
1319 // We distinguish relative paths from absolute paths by the
1320 // absence of '/' at the beginning of relative paths.
1322 // FIXME: This is wrong. We distinguish them by asking if the path is
1323 // absolute, which isn't the same thing. And there might be multiple '/'s
1324 // in a row. Use a better mechanism to indicate whether we have emitted an
1325 // absolute or relative path.
1329 return Filename + Pos;
1332 ASTFileSignature ASTWriter::createSignature(StringRef Bytes) {
1333 // Calculate the hash till start of UNHASHED_CONTROL_BLOCK.
1335 Hasher.update(ArrayRef<uint8_t>(Bytes.bytes_begin(), Bytes.size()));
1336 auto Hash = Hasher.result();
1338 // Convert to an array [5*i32].
1339 ASTFileSignature Signature;
1340 auto LShift = [&](unsigned char Val, unsigned Shift) {
1341 return (uint32_t)Val << Shift;
1343 for (int I = 0; I != 5; ++I)
1344 Signature[I] = LShift(Hash[I * 4 + 0], 24) | LShift(Hash[I * 4 + 1], 16) |
1345 LShift(Hash[I * 4 + 2], 8) | LShift(Hash[I * 4 + 3], 0);
1350 ASTFileSignature ASTWriter::writeUnhashedControlBlock(Preprocessor &PP,
1351 ASTContext &Context) {
1352 // Flush first to prepare the PCM hash (signature).
1353 Stream.FlushToWord();
1354 auto StartOfUnhashedControl = Stream.GetCurrentBitNo() >> 3;
1356 // Enter the block and prepare to write records.
1358 Stream.EnterSubblock(UNHASHED_CONTROL_BLOCK_ID, 5);
1360 // For implicit modules, write the hash of the PCM as its signature.
1361 ASTFileSignature Signature;
1362 if (WritingModule &&
1363 PP.getHeaderSearchInfo().getHeaderSearchOpts().ModulesHashContent) {
1364 Signature = createSignature(StringRef(Buffer.begin(), StartOfUnhashedControl));
1365 Record.append(Signature.begin(), Signature.end());
1366 Stream.EmitRecord(SIGNATURE, Record);
1370 // Diagnostic options.
1371 const auto &Diags = Context.getDiagnostics();
1372 const DiagnosticOptions &DiagOpts = Diags.getDiagnosticOptions();
1373 #define DIAGOPT(Name, Bits, Default) Record.push_back(DiagOpts.Name);
1374 #define ENUM_DIAGOPT(Name, Type, Bits, Default) \
1375 Record.push_back(static_cast<unsigned>(DiagOpts.get##Name()));
1376 #include "clang/Basic/DiagnosticOptions.def"
1377 Record.push_back(DiagOpts.Warnings.size());
1378 for (unsigned I = 0, N = DiagOpts.Warnings.size(); I != N; ++I)
1379 AddString(DiagOpts.Warnings[I], Record);
1380 Record.push_back(DiagOpts.Remarks.size());
1381 for (unsigned I = 0, N = DiagOpts.Remarks.size(); I != N; ++I)
1382 AddString(DiagOpts.Remarks[I], Record);
1383 // Note: we don't serialize the log or serialization file names, because they
1384 // are generally transient files and will almost always be overridden.
1385 Stream.EmitRecord(DIAGNOSTIC_OPTIONS, Record);
1387 // Write out the diagnostic/pragma mappings.
1388 WritePragmaDiagnosticMappings(Diags, /* IsModule = */ WritingModule);
1390 // Leave the options block.
1395 /// \brief Write the control block.
1396 void ASTWriter::WriteControlBlock(Preprocessor &PP, ASTContext &Context,
1398 const std::string &OutputFile) {
1399 using namespace llvm;
1400 Stream.EnterSubblock(CONTROL_BLOCK_ID, 5);
1404 auto MetadataAbbrev = std::make_shared<BitCodeAbbrev>();
1405 MetadataAbbrev->Add(BitCodeAbbrevOp(METADATA));
1406 MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Major
1407 MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Minor
1408 MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Clang maj.
1409 MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Clang min.
1410 MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Relocatable
1411 MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Timestamps
1412 MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Errors
1413 MetadataAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // SVN branch/tag
1414 unsigned MetadataAbbrevCode = Stream.EmitAbbrev(std::move(MetadataAbbrev));
1415 assert((!WritingModule || isysroot.empty()) &&
1416 "writing module as a relocatable PCH?");
1418 RecordData::value_type Record[] = {METADATA, VERSION_MAJOR, VERSION_MINOR,
1419 CLANG_VERSION_MAJOR, CLANG_VERSION_MINOR,
1420 !isysroot.empty(), IncludeTimestamps,
1421 ASTHasCompilerErrors};
1422 Stream.EmitRecordWithBlob(MetadataAbbrevCode, Record,
1423 getClangFullRepositoryVersion());
1426 if (WritingModule) {
1428 auto Abbrev = std::make_shared<BitCodeAbbrev>();
1429 Abbrev->Add(BitCodeAbbrevOp(MODULE_NAME));
1430 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
1431 unsigned AbbrevCode = Stream.EmitAbbrev(std::move(Abbrev));
1432 RecordData::value_type Record[] = {MODULE_NAME};
1433 Stream.EmitRecordWithBlob(AbbrevCode, Record, WritingModule->Name);
1436 if (WritingModule && WritingModule->Directory) {
1437 SmallString<128> BaseDir(WritingModule->Directory->getName());
1438 cleanPathForOutput(Context.getSourceManager().getFileManager(), BaseDir);
1440 // If the home of the module is the current working directory, then we
1441 // want to pick up the cwd of the build process loading the module, not
1442 // our cwd, when we load this module.
1443 if (!PP.getHeaderSearchInfo()
1444 .getHeaderSearchOpts()
1445 .ModuleMapFileHomeIsCwd ||
1446 WritingModule->Directory->getName() != StringRef(".")) {
1447 // Module directory.
1448 auto Abbrev = std::make_shared<BitCodeAbbrev>();
1449 Abbrev->Add(BitCodeAbbrevOp(MODULE_DIRECTORY));
1450 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Directory
1451 unsigned AbbrevCode = Stream.EmitAbbrev(std::move(Abbrev));
1453 RecordData::value_type Record[] = {MODULE_DIRECTORY};
1454 Stream.EmitRecordWithBlob(AbbrevCode, Record, BaseDir);
1457 // Write out all other paths relative to the base directory if possible.
1458 BaseDirectory.assign(BaseDir.begin(), BaseDir.end());
1459 } else if (!isysroot.empty()) {
1460 // Write out paths relative to the sysroot if possible.
1461 BaseDirectory = isysroot;
1465 if (WritingModule && WritingModule->Kind == Module::ModuleMapModule) {
1468 auto &Map = PP.getHeaderSearchInfo().getModuleMap();
1469 AddPath(WritingModule->PresumedModuleMapFile.empty()
1470 ? Map.getModuleMapFileForUniquing(WritingModule)->getName()
1471 : StringRef(WritingModule->PresumedModuleMapFile),
1474 // Additional module map files.
1475 if (auto *AdditionalModMaps =
1476 Map.getAdditionalModuleMapFiles(WritingModule)) {
1477 Record.push_back(AdditionalModMaps->size());
1478 for (const FileEntry *F : *AdditionalModMaps)
1479 AddPath(F->getName(), Record);
1481 Record.push_back(0);
1484 Stream.EmitRecord(MODULE_MAP_FILE, Record);
1489 serialization::ModuleManager &Mgr = Chain->getModuleManager();
1492 for (ModuleFile &M : Mgr) {
1493 // Skip modules that weren't directly imported.
1494 if (!M.isDirectlyImported())
1497 Record.push_back((unsigned)M.Kind); // FIXME: Stable encoding
1498 AddSourceLocation(M.ImportLoc, Record);
1500 // If we have calculated signature, there is no need to store
1501 // the size or timestamp.
1502 Record.push_back(M.Signature ? 0 : M.File->getSize());
1503 Record.push_back(M.Signature ? 0 : getTimestampForOutput(M.File));
1505 for (auto I : M.Signature)
1506 Record.push_back(I);
1508 AddPath(M.FileName, Record);
1510 Stream.EmitRecord(IMPORTS, Record);
1513 // Write the options block.
1514 Stream.EnterSubblock(OPTIONS_BLOCK_ID, 4);
1516 // Language options.
1518 const LangOptions &LangOpts = Context.getLangOpts();
1519 #define LANGOPT(Name, Bits, Default, Description) \
1520 Record.push_back(LangOpts.Name);
1521 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
1522 Record.push_back(static_cast<unsigned>(LangOpts.get##Name()));
1523 #include "clang/Basic/LangOptions.def"
1524 #define SANITIZER(NAME, ID) \
1525 Record.push_back(LangOpts.Sanitize.has(SanitizerKind::ID));
1526 #include "clang/Basic/Sanitizers.def"
1528 Record.push_back(LangOpts.ModuleFeatures.size());
1529 for (StringRef Feature : LangOpts.ModuleFeatures)
1530 AddString(Feature, Record);
1532 Record.push_back((unsigned) LangOpts.ObjCRuntime.getKind());
1533 AddVersionTuple(LangOpts.ObjCRuntime.getVersion(), Record);
1535 AddString(LangOpts.CurrentModule, Record);
1538 Record.push_back(LangOpts.CommentOpts.BlockCommandNames.size());
1539 for (const auto &I : LangOpts.CommentOpts.BlockCommandNames) {
1540 AddString(I, Record);
1542 Record.push_back(LangOpts.CommentOpts.ParseAllComments);
1544 // OpenMP offloading options.
1545 Record.push_back(LangOpts.OMPTargetTriples.size());
1546 for (auto &T : LangOpts.OMPTargetTriples)
1547 AddString(T.getTriple(), Record);
1549 AddString(LangOpts.OMPHostIRFile, Record);
1551 Stream.EmitRecord(LANGUAGE_OPTIONS, Record);
1555 const TargetInfo &Target = Context.getTargetInfo();
1556 const TargetOptions &TargetOpts = Target.getTargetOpts();
1557 AddString(TargetOpts.Triple, Record);
1558 AddString(TargetOpts.CPU, Record);
1559 AddString(TargetOpts.ABI, Record);
1560 Record.push_back(TargetOpts.FeaturesAsWritten.size());
1561 for (unsigned I = 0, N = TargetOpts.FeaturesAsWritten.size(); I != N; ++I) {
1562 AddString(TargetOpts.FeaturesAsWritten[I], Record);
1564 Record.push_back(TargetOpts.Features.size());
1565 for (unsigned I = 0, N = TargetOpts.Features.size(); I != N; ++I) {
1566 AddString(TargetOpts.Features[I], Record);
1568 Stream.EmitRecord(TARGET_OPTIONS, Record);
1570 // File system options.
1572 const FileSystemOptions &FSOpts =
1573 Context.getSourceManager().getFileManager().getFileSystemOpts();
1574 AddString(FSOpts.WorkingDir, Record);
1575 Stream.EmitRecord(FILE_SYSTEM_OPTIONS, Record);
1577 // Header search options.
1579 const HeaderSearchOptions &HSOpts
1580 = PP.getHeaderSearchInfo().getHeaderSearchOpts();
1581 AddString(HSOpts.Sysroot, Record);
1584 Record.push_back(HSOpts.UserEntries.size());
1585 for (unsigned I = 0, N = HSOpts.UserEntries.size(); I != N; ++I) {
1586 const HeaderSearchOptions::Entry &Entry = HSOpts.UserEntries[I];
1587 AddString(Entry.Path, Record);
1588 Record.push_back(static_cast<unsigned>(Entry.Group));
1589 Record.push_back(Entry.IsFramework);
1590 Record.push_back(Entry.IgnoreSysRoot);
1593 // System header prefixes.
1594 Record.push_back(HSOpts.SystemHeaderPrefixes.size());
1595 for (unsigned I = 0, N = HSOpts.SystemHeaderPrefixes.size(); I != N; ++I) {
1596 AddString(HSOpts.SystemHeaderPrefixes[I].Prefix, Record);
1597 Record.push_back(HSOpts.SystemHeaderPrefixes[I].IsSystemHeader);
1600 AddString(HSOpts.ResourceDir, Record);
1601 AddString(HSOpts.ModuleCachePath, Record);
1602 AddString(HSOpts.ModuleUserBuildPath, Record);
1603 Record.push_back(HSOpts.DisableModuleHash);
1604 Record.push_back(HSOpts.ImplicitModuleMaps);
1605 Record.push_back(HSOpts.ModuleMapFileHomeIsCwd);
1606 Record.push_back(HSOpts.UseBuiltinIncludes);
1607 Record.push_back(HSOpts.UseStandardSystemIncludes);
1608 Record.push_back(HSOpts.UseStandardCXXIncludes);
1609 Record.push_back(HSOpts.UseLibcxx);
1610 // Write out the specific module cache path that contains the module files.
1611 AddString(PP.getHeaderSearchInfo().getModuleCachePath(), Record);
1612 Stream.EmitRecord(HEADER_SEARCH_OPTIONS, Record);
1614 // Preprocessor options.
1616 const PreprocessorOptions &PPOpts = PP.getPreprocessorOpts();
1618 // Macro definitions.
1619 Record.push_back(PPOpts.Macros.size());
1620 for (unsigned I = 0, N = PPOpts.Macros.size(); I != N; ++I) {
1621 AddString(PPOpts.Macros[I].first, Record);
1622 Record.push_back(PPOpts.Macros[I].second);
1626 Record.push_back(PPOpts.Includes.size());
1627 for (unsigned I = 0, N = PPOpts.Includes.size(); I != N; ++I)
1628 AddString(PPOpts.Includes[I], Record);
1631 Record.push_back(PPOpts.MacroIncludes.size());
1632 for (unsigned I = 0, N = PPOpts.MacroIncludes.size(); I != N; ++I)
1633 AddString(PPOpts.MacroIncludes[I], Record);
1635 Record.push_back(PPOpts.UsePredefines);
1636 // Detailed record is important since it is used for the module cache hash.
1637 Record.push_back(PPOpts.DetailedRecord);
1638 AddString(PPOpts.ImplicitPCHInclude, Record);
1639 AddString(PPOpts.ImplicitPTHInclude, Record);
1640 Record.push_back(static_cast<unsigned>(PPOpts.ObjCXXARCStandardLibrary));
1641 Stream.EmitRecord(PREPROCESSOR_OPTIONS, Record);
1643 // Leave the options block.
1646 // Original file name and file ID
1647 SourceManager &SM = Context.getSourceManager();
1648 if (const FileEntry *MainFile = SM.getFileEntryForID(SM.getMainFileID())) {
1649 auto FileAbbrev = std::make_shared<BitCodeAbbrev>();
1650 FileAbbrev->Add(BitCodeAbbrevOp(ORIGINAL_FILE));
1651 FileAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // File ID
1652 FileAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // File name
1653 unsigned FileAbbrevCode = Stream.EmitAbbrev(std::move(FileAbbrev));
1656 Record.push_back(ORIGINAL_FILE);
1657 Record.push_back(SM.getMainFileID().getOpaqueValue());
1658 EmitRecordWithPath(FileAbbrevCode, Record, MainFile->getName());
1662 Record.push_back(SM.getMainFileID().getOpaqueValue());
1663 Stream.EmitRecord(ORIGINAL_FILE_ID, Record);
1665 // Original PCH directory
1666 if (!OutputFile.empty() && OutputFile != "-") {
1667 auto Abbrev = std::make_shared<BitCodeAbbrev>();
1668 Abbrev->Add(BitCodeAbbrevOp(ORIGINAL_PCH_DIR));
1669 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // File name
1670 unsigned AbbrevCode = Stream.EmitAbbrev(std::move(Abbrev));
1672 SmallString<128> OutputPath(OutputFile);
1674 SM.getFileManager().makeAbsolutePath(OutputPath);
1675 StringRef origDir = llvm::sys::path::parent_path(OutputPath);
1677 RecordData::value_type Record[] = {ORIGINAL_PCH_DIR};
1678 Stream.EmitRecordWithBlob(AbbrevCode, Record, origDir);
1681 WriteInputFiles(Context.SourceMgr,
1682 PP.getHeaderSearchInfo().getHeaderSearchOpts(),
1683 PP.getLangOpts().Modules);
1689 /// \brief An input file.
1690 struct InputFileEntry {
1691 const FileEntry *File;
1694 bool BufferOverridden;
1695 bool IsTopLevelModuleMap;
1698 } // end anonymous namespace
1700 void ASTWriter::WriteInputFiles(SourceManager &SourceMgr,
1701 HeaderSearchOptions &HSOpts,
1703 using namespace llvm;
1704 Stream.EnterSubblock(INPUT_FILES_BLOCK_ID, 4);
1706 // Create input-file abbreviation.
1707 auto IFAbbrev = std::make_shared<BitCodeAbbrev>();
1708 IFAbbrev->Add(BitCodeAbbrevOp(INPUT_FILE));
1709 IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ID
1710 IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 12)); // Size
1711 IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 32)); // Modification time
1712 IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Overridden
1713 IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Transient
1714 IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Module map
1715 IFAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // File name
1716 unsigned IFAbbrevCode = Stream.EmitAbbrev(std::move(IFAbbrev));
1718 // Get all ContentCache objects for files, sorted by whether the file is a
1719 // system one or not. System files go at the back, users files at the front.
1720 std::deque<InputFileEntry> SortedFiles;
1721 for (unsigned I = 1, N = SourceMgr.local_sloc_entry_size(); I != N; ++I) {
1722 // Get this source location entry.
1723 const SrcMgr::SLocEntry *SLoc = &SourceMgr.getLocalSLocEntry(I);
1724 assert(&SourceMgr.getSLocEntry(FileID::get(I)) == SLoc);
1726 // We only care about file entries that were not overridden.
1727 if (!SLoc->isFile())
1729 const SrcMgr::FileInfo &File = SLoc->getFile();
1730 const SrcMgr::ContentCache *Cache = File.getContentCache();
1731 if (!Cache->OrigEntry)
1734 InputFileEntry Entry;
1735 Entry.File = Cache->OrigEntry;
1736 Entry.IsSystemFile = Cache->IsSystemFile;
1737 Entry.IsTransient = Cache->IsTransient;
1738 Entry.BufferOverridden = Cache->BufferOverridden;
1739 Entry.IsTopLevelModuleMap = isModuleMap(File.getFileCharacteristic()) &&
1740 File.getIncludeLoc().isInvalid();
1741 if (Cache->IsSystemFile)
1742 SortedFiles.push_back(Entry);
1744 SortedFiles.push_front(Entry);
1747 unsigned UserFilesNum = 0;
1748 // Write out all of the input files.
1749 std::vector<uint64_t> InputFileOffsets;
1750 for (const auto &Entry : SortedFiles) {
1751 uint32_t &InputFileID = InputFileIDs[Entry.File];
1752 if (InputFileID != 0)
1753 continue; // already recorded this file.
1755 // Record this entry's offset.
1756 InputFileOffsets.push_back(Stream.GetCurrentBitNo());
1758 InputFileID = InputFileOffsets.size();
1760 if (!Entry.IsSystemFile)
1763 // Emit size/modification time for this file.
1764 // And whether this file was overridden.
1765 RecordData::value_type Record[] = {
1767 InputFileOffsets.size(),
1768 (uint64_t)Entry.File->getSize(),
1769 (uint64_t)getTimestampForOutput(Entry.File),
1770 Entry.BufferOverridden,
1772 Entry.IsTopLevelModuleMap};
1774 EmitRecordWithPath(IFAbbrevCode, Record, Entry.File->getName());
1779 // Create input file offsets abbreviation.
1780 auto OffsetsAbbrev = std::make_shared<BitCodeAbbrev>();
1781 OffsetsAbbrev->Add(BitCodeAbbrevOp(INPUT_FILE_OFFSETS));
1782 OffsetsAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // # input files
1783 OffsetsAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // # non-system
1785 OffsetsAbbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Array
1786 unsigned OffsetsAbbrevCode = Stream.EmitAbbrev(std::move(OffsetsAbbrev));
1788 // Write input file offsets.
1789 RecordData::value_type Record[] = {INPUT_FILE_OFFSETS,
1790 InputFileOffsets.size(), UserFilesNum};
1791 Stream.EmitRecordWithBlob(OffsetsAbbrevCode, Record, bytes(InputFileOffsets));
1794 //===----------------------------------------------------------------------===//
1795 // Source Manager Serialization
1796 //===----------------------------------------------------------------------===//
1798 /// \brief Create an abbreviation for the SLocEntry that refers to a
1800 static unsigned CreateSLocFileAbbrev(llvm::BitstreamWriter &Stream) {
1801 using namespace llvm;
1803 auto Abbrev = std::make_shared<BitCodeAbbrev>();
1804 Abbrev->Add(BitCodeAbbrevOp(SM_SLOC_FILE_ENTRY));
1805 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Offset
1806 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Include location
1807 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); // Characteristic
1808 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Line directives
1809 // FileEntry fields.
1810 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Input File ID
1811 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // NumCreatedFIDs
1812 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 24)); // FirstDeclIndex
1813 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // NumDecls
1814 return Stream.EmitAbbrev(std::move(Abbrev));
1817 /// \brief Create an abbreviation for the SLocEntry that refers to a
1819 static unsigned CreateSLocBufferAbbrev(llvm::BitstreamWriter &Stream) {
1820 using namespace llvm;
1822 auto Abbrev = std::make_shared<BitCodeAbbrev>();
1823 Abbrev->Add(BitCodeAbbrevOp(SM_SLOC_BUFFER_ENTRY));
1824 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Offset
1825 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Include location
1826 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); // Characteristic
1827 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // Line directives
1828 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Buffer name blob
1829 return Stream.EmitAbbrev(std::move(Abbrev));
1832 /// \brief Create an abbreviation for the SLocEntry that refers to a
1834 static unsigned CreateSLocBufferBlobAbbrev(llvm::BitstreamWriter &Stream,
1836 using namespace llvm;
1838 auto Abbrev = std::make_shared<BitCodeAbbrev>();
1839 Abbrev->Add(BitCodeAbbrevOp(Compressed ? SM_SLOC_BUFFER_BLOB_COMPRESSED
1840 : SM_SLOC_BUFFER_BLOB));
1842 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Uncompressed size
1843 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Blob
1844 return Stream.EmitAbbrev(std::move(Abbrev));
1847 /// \brief Create an abbreviation for the SLocEntry that refers to a macro
1849 static unsigned CreateSLocExpansionAbbrev(llvm::BitstreamWriter &Stream) {
1850 using namespace llvm;
1852 auto Abbrev = std::make_shared<BitCodeAbbrev>();
1853 Abbrev->Add(BitCodeAbbrevOp(SM_SLOC_EXPANSION_ENTRY));
1854 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Offset
1855 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Spelling location
1856 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // Start location
1857 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // End location
1858 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Token length
1859 return Stream.EmitAbbrev(std::move(Abbrev));
1864 // Trait used for the on-disk hash table of header search information.
1865 class HeaderFileInfoTrait {
1868 // Keep track of the framework names we've used during serialization.
1869 SmallVector<char, 128> FrameworkStringData;
1870 llvm::StringMap<unsigned> FrameworkNameOffset;
1873 HeaderFileInfoTrait(ASTWriter &Writer) : Writer(Writer) {}
1880 typedef const key_type &key_type_ref;
1882 using UnresolvedModule =
1883 llvm::PointerIntPair<Module *, 2, ModuleMap::ModuleHeaderRole>;
1886 const HeaderFileInfo &HFI;
1887 ArrayRef<ModuleMap::KnownHeader> KnownHeaders;
1888 UnresolvedModule Unresolved;
1890 typedef const data_type &data_type_ref;
1892 typedef unsigned hash_value_type;
1893 typedef unsigned offset_type;
1895 hash_value_type ComputeHash(key_type_ref key) {
1896 // The hash is based only on size/time of the file, so that the reader can
1897 // match even when symlinking or excess path elements ("foo/../", "../")
1898 // change the form of the name. However, complete path is still the key.
1899 return llvm::hash_combine(key.Size, key.ModTime);
1902 std::pair<unsigned,unsigned>
1903 EmitKeyDataLength(raw_ostream& Out, key_type_ref key, data_type_ref Data) {
1904 using namespace llvm::support;
1905 endian::Writer<little> LE(Out);
1906 unsigned KeyLen = key.Filename.size() + 1 + 8 + 8;
1907 LE.write<uint16_t>(KeyLen);
1908 unsigned DataLen = 1 + 2 + 4 + 4;
1909 for (auto ModInfo : Data.KnownHeaders)
1910 if (Writer.getLocalOrImportedSubmoduleID(ModInfo.getModule()))
1912 if (Data.Unresolved.getPointer())
1914 LE.write<uint8_t>(DataLen);
1915 return std::make_pair(KeyLen, DataLen);
1918 void EmitKey(raw_ostream& Out, key_type_ref key, unsigned KeyLen) {
1919 using namespace llvm::support;
1920 endian::Writer<little> LE(Out);
1921 LE.write<uint64_t>(key.Size);
1923 LE.write<uint64_t>(key.ModTime);
1925 Out.write(key.Filename.data(), KeyLen);
1928 void EmitData(raw_ostream &Out, key_type_ref key,
1929 data_type_ref Data, unsigned DataLen) {
1930 using namespace llvm::support;
1931 endian::Writer<little> LE(Out);
1932 uint64_t Start = Out.tell(); (void)Start;
1934 unsigned char Flags = (Data.HFI.isImport << 5)
1935 | (Data.HFI.isPragmaOnce << 4)
1936 | (Data.HFI.DirInfo << 1)
1937 | Data.HFI.IndexHeaderMapHeader;
1938 LE.write<uint8_t>(Flags);
1939 LE.write<uint16_t>(Data.HFI.NumIncludes);
1941 if (!Data.HFI.ControllingMacro)
1942 LE.write<uint32_t>(Data.HFI.ControllingMacroID);
1944 LE.write<uint32_t>(Writer.getIdentifierRef(Data.HFI.ControllingMacro));
1946 unsigned Offset = 0;
1947 if (!Data.HFI.Framework.empty()) {
1948 // If this header refers into a framework, save the framework name.
1949 llvm::StringMap<unsigned>::iterator Pos
1950 = FrameworkNameOffset.find(Data.HFI.Framework);
1951 if (Pos == FrameworkNameOffset.end()) {
1952 Offset = FrameworkStringData.size() + 1;
1953 FrameworkStringData.append(Data.HFI.Framework.begin(),
1954 Data.HFI.Framework.end());
1955 FrameworkStringData.push_back(0);
1957 FrameworkNameOffset[Data.HFI.Framework] = Offset;
1959 Offset = Pos->second;
1961 LE.write<uint32_t>(Offset);
1963 auto EmitModule = [&](Module *M, ModuleMap::ModuleHeaderRole Role) {
1964 if (uint32_t ModID = Writer.getLocalOrImportedSubmoduleID(M)) {
1965 uint32_t Value = (ModID << 2) | (unsigned)Role;
1966 assert((Value >> 2) == ModID && "overflow in header module info");
1967 LE.write<uint32_t>(Value);
1971 // FIXME: If the header is excluded, we should write out some
1972 // record of that fact.
1973 for (auto ModInfo : Data.KnownHeaders)
1974 EmitModule(ModInfo.getModule(), ModInfo.getRole());
1975 if (Data.Unresolved.getPointer())
1976 EmitModule(Data.Unresolved.getPointer(), Data.Unresolved.getInt());
1978 assert(Out.tell() - Start == DataLen && "Wrong data length");
1981 const char *strings_begin() const { return FrameworkStringData.begin(); }
1982 const char *strings_end() const { return FrameworkStringData.end(); }
1985 } // end anonymous namespace
1987 /// \brief Write the header search block for the list of files that
1989 /// \param HS The header search structure to save.
1990 void ASTWriter::WriteHeaderSearch(const HeaderSearch &HS) {
1991 HeaderFileInfoTrait GeneratorTrait(*this);
1992 llvm::OnDiskChainedHashTableGenerator<HeaderFileInfoTrait> Generator;
1993 SmallVector<const char *, 4> SavedStrings;
1994 unsigned NumHeaderSearchEntries = 0;
1996 // Find all unresolved headers for the current module. We generally will
1997 // have resolved them before we get here, but not necessarily: we might be
1998 // compiling a preprocessed module, where there is no requirement for the
1999 // original files to exist any more.
2000 const HeaderFileInfo Empty; // So we can take a reference.
2001 if (WritingModule) {
2002 llvm::SmallVector<Module *, 16> Worklist(1, WritingModule);
2003 while (!Worklist.empty()) {
2004 Module *M = Worklist.pop_back_val();
2005 if (!M->isAvailable())
2008 // Map to disk files where possible, to pick up any missing stat
2009 // information. This also means we don't need to check the unresolved
2010 // headers list when emitting resolved headers in the first loop below.
2011 // FIXME: It'd be preferable to avoid doing this if we were given
2012 // sufficient stat information in the module map.
2013 HS.getModuleMap().resolveHeaderDirectives(M);
2015 // If the file didn't exist, we can still create a module if we were given
2016 // enough information in the module map.
2017 for (auto U : M->MissingHeaders) {
2018 // Check that we were given enough information to build a module
2019 // without this file existing on disk.
2020 if (!U.Size || (!U.ModTime && IncludeTimestamps)) {
2021 PP->Diag(U.FileNameLoc, diag::err_module_no_size_mtime_for_header)
2022 << WritingModule->getFullModuleName() << U.Size.hasValue()
2027 // Form the effective relative pathname for the file.
2028 SmallString<128> Filename(M->Directory->getName());
2029 llvm::sys::path::append(Filename, U.FileName);
2030 PreparePathForOutput(Filename);
2032 StringRef FilenameDup = strdup(Filename.c_str());
2033 SavedStrings.push_back(FilenameDup.data());
2035 HeaderFileInfoTrait::key_type Key = {
2036 FilenameDup, *U.Size, IncludeTimestamps ? *U.ModTime : 0
2038 HeaderFileInfoTrait::data_type Data = {
2039 Empty, {}, {M, ModuleMap::headerKindToRole(U.Kind)}
2041 // FIXME: Deal with cases where there are multiple unresolved header
2042 // directives in different submodules for the same header.
2043 Generator.insert(Key, Data, GeneratorTrait);
2044 ++NumHeaderSearchEntries;
2047 Worklist.append(M->submodule_begin(), M->submodule_end());
2051 SmallVector<const FileEntry *, 16> FilesByUID;
2052 HS.getFileMgr().GetUniqueIDMapping(FilesByUID);
2054 if (FilesByUID.size() > HS.header_file_size())
2055 FilesByUID.resize(HS.header_file_size());
2057 for (unsigned UID = 0, LastUID = FilesByUID.size(); UID != LastUID; ++UID) {
2058 const FileEntry *File = FilesByUID[UID];
2062 // Get the file info. This will load info from the external source if
2063 // necessary. Skip emitting this file if we have no information on it
2064 // as a header file (in which case HFI will be null) or if it hasn't
2065 // changed since it was loaded. Also skip it if it's for a modular header
2066 // from a different module; in that case, we rely on the module(s)
2067 // containing the header to provide this information.
2068 const HeaderFileInfo *HFI =
2069 HS.getExistingFileInfo(File, /*WantExternal*/!Chain);
2070 if (!HFI || (HFI->isModuleHeader && !HFI->isCompilingModuleHeader))
2073 // Massage the file path into an appropriate form.
2074 StringRef Filename = File->getName();
2075 SmallString<128> FilenameTmp(Filename);
2076 if (PreparePathForOutput(FilenameTmp)) {
2077 // If we performed any translation on the file name at all, we need to
2078 // save this string, since the generator will refer to it later.
2079 Filename = StringRef(strdup(FilenameTmp.c_str()));
2080 SavedStrings.push_back(Filename.data());
2083 HeaderFileInfoTrait::key_type Key = {
2084 Filename, File->getSize(), getTimestampForOutput(File)
2086 HeaderFileInfoTrait::data_type Data = {
2087 *HFI, HS.getModuleMap().findAllModulesForHeader(File), {}
2089 Generator.insert(Key, Data, GeneratorTrait);
2090 ++NumHeaderSearchEntries;
2093 // Create the on-disk hash table in a buffer.
2094 SmallString<4096> TableData;
2095 uint32_t BucketOffset;
2097 using namespace llvm::support;
2098 llvm::raw_svector_ostream Out(TableData);
2099 // Make sure that no bucket is at offset 0
2100 endian::Writer<little>(Out).write<uint32_t>(0);
2101 BucketOffset = Generator.Emit(Out, GeneratorTrait);
2104 // Create a blob abbreviation
2105 using namespace llvm;
2107 auto Abbrev = std::make_shared<BitCodeAbbrev>();
2108 Abbrev->Add(BitCodeAbbrevOp(HEADER_SEARCH_TABLE));
2109 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
2110 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
2111 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
2112 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
2113 unsigned TableAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
2115 // Write the header search table
2116 RecordData::value_type Record[] = {HEADER_SEARCH_TABLE, BucketOffset,
2117 NumHeaderSearchEntries, TableData.size()};
2118 TableData.append(GeneratorTrait.strings_begin(),GeneratorTrait.strings_end());
2119 Stream.EmitRecordWithBlob(TableAbbrev, Record, TableData);
2121 // Free all of the strings we had to duplicate.
2122 for (unsigned I = 0, N = SavedStrings.size(); I != N; ++I)
2123 free(const_cast<char *>(SavedStrings[I]));
2126 static void emitBlob(llvm::BitstreamWriter &Stream, StringRef Blob,
2127 unsigned SLocBufferBlobCompressedAbbrv,
2128 unsigned SLocBufferBlobAbbrv) {
2129 typedef ASTWriter::RecordData::value_type RecordDataType;
2131 // Compress the buffer if possible. We expect that almost all PCM
2132 // consumers will not want its contents.
2133 SmallString<0> CompressedBuffer;
2134 if (llvm::zlib::isAvailable()) {
2135 llvm::Error E = llvm::zlib::compress(Blob.drop_back(1), CompressedBuffer);
2137 RecordDataType Record[] = {SM_SLOC_BUFFER_BLOB_COMPRESSED,
2139 Stream.EmitRecordWithBlob(SLocBufferBlobCompressedAbbrv, Record,
2143 llvm::consumeError(std::move(E));
2146 RecordDataType Record[] = {SM_SLOC_BUFFER_BLOB};
2147 Stream.EmitRecordWithBlob(SLocBufferBlobAbbrv, Record, Blob);
2150 /// \brief Writes the block containing the serialized form of the
2153 /// TODO: We should probably use an on-disk hash table (stored in a
2154 /// blob), indexed based on the file name, so that we only create
2155 /// entries for files that we actually need. In the common case (no
2156 /// errors), we probably won't have to create file entries for any of
2157 /// the files in the AST.
2158 void ASTWriter::WriteSourceManagerBlock(SourceManager &SourceMgr,
2159 const Preprocessor &PP) {
2162 // Enter the source manager block.
2163 Stream.EnterSubblock(SOURCE_MANAGER_BLOCK_ID, 4);
2165 // Abbreviations for the various kinds of source-location entries.
2166 unsigned SLocFileAbbrv = CreateSLocFileAbbrev(Stream);
2167 unsigned SLocBufferAbbrv = CreateSLocBufferAbbrev(Stream);
2168 unsigned SLocBufferBlobAbbrv = CreateSLocBufferBlobAbbrev(Stream, false);
2169 unsigned SLocBufferBlobCompressedAbbrv =
2170 CreateSLocBufferBlobAbbrev(Stream, true);
2171 unsigned SLocExpansionAbbrv = CreateSLocExpansionAbbrev(Stream);
2173 // Write out the source location entry table. We skip the first
2174 // entry, which is always the same dummy entry.
2175 std::vector<uint32_t> SLocEntryOffsets;
2176 RecordData PreloadSLocs;
2177 SLocEntryOffsets.reserve(SourceMgr.local_sloc_entry_size() - 1);
2178 for (unsigned I = 1, N = SourceMgr.local_sloc_entry_size();
2180 // Get this source location entry.
2181 const SrcMgr::SLocEntry *SLoc = &SourceMgr.getLocalSLocEntry(I);
2182 FileID FID = FileID::get(I);
2183 assert(&SourceMgr.getSLocEntry(FID) == SLoc);
2185 // Record the offset of this source-location entry.
2186 SLocEntryOffsets.push_back(Stream.GetCurrentBitNo());
2188 // Figure out which record code to use.
2190 if (SLoc->isFile()) {
2191 const SrcMgr::ContentCache *Cache = SLoc->getFile().getContentCache();
2192 if (Cache->OrigEntry) {
2193 Code = SM_SLOC_FILE_ENTRY;
2195 Code = SM_SLOC_BUFFER_ENTRY;
2197 Code = SM_SLOC_EXPANSION_ENTRY;
2199 Record.push_back(Code);
2201 // Starting offset of this entry within this module, so skip the dummy.
2202 Record.push_back(SLoc->getOffset() - 2);
2203 if (SLoc->isFile()) {
2204 const SrcMgr::FileInfo &File = SLoc->getFile();
2205 AddSourceLocation(File.getIncludeLoc(), Record);
2206 Record.push_back(File.getFileCharacteristic()); // FIXME: stable encoding
2207 Record.push_back(File.hasLineDirectives());
2209 const SrcMgr::ContentCache *Content = File.getContentCache();
2210 bool EmitBlob = false;
2211 if (Content->OrigEntry) {
2212 assert(Content->OrigEntry == Content->ContentsEntry &&
2213 "Writing to AST an overridden file is not supported");
2215 // The source location entry is a file. Emit input file ID.
2216 assert(InputFileIDs[Content->OrigEntry] != 0 && "Missed file entry");
2217 Record.push_back(InputFileIDs[Content->OrigEntry]);
2219 Record.push_back(File.NumCreatedFIDs);
2221 FileDeclIDsTy::iterator FDI = FileDeclIDs.find(FID);
2222 if (FDI != FileDeclIDs.end()) {
2223 Record.push_back(FDI->second->FirstDeclIndex);
2224 Record.push_back(FDI->second->DeclIDs.size());
2226 Record.push_back(0);
2227 Record.push_back(0);
2230 Stream.EmitRecordWithAbbrev(SLocFileAbbrv, Record);
2232 if (Content->BufferOverridden || Content->IsTransient)
2235 // The source location entry is a buffer. The blob associated
2236 // with this entry contains the contents of the buffer.
2238 // We add one to the size so that we capture the trailing NULL
2239 // that is required by llvm::MemoryBuffer::getMemBuffer (on
2240 // the reader side).
2241 const llvm::MemoryBuffer *Buffer
2242 = Content->getBuffer(PP.getDiagnostics(), PP.getSourceManager());
2243 StringRef Name = Buffer->getBufferIdentifier();
2244 Stream.EmitRecordWithBlob(SLocBufferAbbrv, Record,
2245 StringRef(Name.data(), Name.size() + 1));
2248 if (Name == "<built-in>")
2249 PreloadSLocs.push_back(SLocEntryOffsets.size());
2253 // Include the implicit terminating null character in the on-disk buffer
2254 // if we're writing it uncompressed.
2255 const llvm::MemoryBuffer *Buffer =
2256 Content->getBuffer(PP.getDiagnostics(), PP.getSourceManager());
2257 StringRef Blob(Buffer->getBufferStart(), Buffer->getBufferSize() + 1);
2258 emitBlob(Stream, Blob, SLocBufferBlobCompressedAbbrv,
2259 SLocBufferBlobAbbrv);
2262 // The source location entry is a macro expansion.
2263 const SrcMgr::ExpansionInfo &Expansion = SLoc->getExpansion();
2264 AddSourceLocation(Expansion.getSpellingLoc(), Record);
2265 AddSourceLocation(Expansion.getExpansionLocStart(), Record);
2266 AddSourceLocation(Expansion.isMacroArgExpansion()
2268 : Expansion.getExpansionLocEnd(),
2271 // Compute the token length for this macro expansion.
2272 unsigned NextOffset = SourceMgr.getNextLocalOffset();
2274 NextOffset = SourceMgr.getLocalSLocEntry(I + 1).getOffset();
2275 Record.push_back(NextOffset - SLoc->getOffset() - 1);
2276 Stream.EmitRecordWithAbbrev(SLocExpansionAbbrv, Record);
2282 if (SLocEntryOffsets.empty())
2285 // Write the source-location offsets table into the AST block. This
2286 // table is used for lazily loading source-location information.
2287 using namespace llvm;
2289 auto Abbrev = std::make_shared<BitCodeAbbrev>();
2290 Abbrev->Add(BitCodeAbbrevOp(SOURCE_LOCATION_OFFSETS));
2291 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 16)); // # of slocs
2292 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 16)); // total size
2293 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // offsets
2294 unsigned SLocOffsetsAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
2296 RecordData::value_type Record[] = {
2297 SOURCE_LOCATION_OFFSETS, SLocEntryOffsets.size(),
2298 SourceMgr.getNextLocalOffset() - 1 /* skip dummy */};
2299 Stream.EmitRecordWithBlob(SLocOffsetsAbbrev, Record,
2300 bytes(SLocEntryOffsets));
2302 // Write the source location entry preloads array, telling the AST
2303 // reader which source locations entries it should load eagerly.
2304 Stream.EmitRecord(SOURCE_LOCATION_PRELOADS, PreloadSLocs);
2306 // Write the line table. It depends on remapping working, so it must come
2307 // after the source location offsets.
2308 if (SourceMgr.hasLineTable()) {
2309 LineTableInfo &LineTable = SourceMgr.getLineTable();
2313 // Emit the needed file names.
2314 llvm::DenseMap<int, int> FilenameMap;
2315 for (const auto &L : LineTable) {
2318 for (auto &LE : L.second) {
2319 if (FilenameMap.insert(std::make_pair(LE.FilenameID,
2320 FilenameMap.size())).second)
2321 AddPath(LineTable.getFilename(LE.FilenameID), Record);
2324 Record.push_back(0);
2326 // Emit the line entries
2327 for (const auto &L : LineTable) {
2328 // Only emit entries for local files.
2333 Record.push_back(L.first.ID);
2335 // Emit the line entries
2336 Record.push_back(L.second.size());
2337 for (const auto &LE : L.second) {
2338 Record.push_back(LE.FileOffset);
2339 Record.push_back(LE.LineNo);
2340 Record.push_back(FilenameMap[LE.FilenameID]);
2341 Record.push_back((unsigned)LE.FileKind);
2342 Record.push_back(LE.IncludeOffset);
2346 Stream.EmitRecord(SOURCE_MANAGER_LINE_TABLE, Record);
2350 //===----------------------------------------------------------------------===//
2351 // Preprocessor Serialization
2352 //===----------------------------------------------------------------------===//
2354 static bool shouldIgnoreMacro(MacroDirective *MD, bool IsModule,
2355 const Preprocessor &PP) {
2356 if (MacroInfo *MI = MD->getMacroInfo())
2357 if (MI->isBuiltinMacro())
2361 SourceLocation Loc = MD->getLocation();
2362 if (Loc.isInvalid())
2364 if (PP.getSourceManager().getFileID(Loc) == PP.getPredefinesFileID())
2371 /// \brief Writes the block containing the serialized form of the
2374 void ASTWriter::WritePreprocessor(const Preprocessor &PP, bool IsModule) {
2375 PreprocessingRecord *PPRec = PP.getPreprocessingRecord();
2377 WritePreprocessorDetail(*PPRec);
2380 RecordData ModuleMacroRecord;
2382 // If the preprocessor __COUNTER__ value has been bumped, remember it.
2383 if (PP.getCounterValue() != 0) {
2384 RecordData::value_type Record[] = {PP.getCounterValue()};
2385 Stream.EmitRecord(PP_COUNTER_VALUE, Record);
2388 if (PP.isRecordingPreamble() && PP.hasRecordedPreamble()) {
2390 for (const auto &Cond : PP.getPreambleConditionalStack()) {
2391 AddSourceLocation(Cond.IfLoc, Record);
2392 Record.push_back(Cond.WasSkipping);
2393 Record.push_back(Cond.FoundNonSkip);
2394 Record.push_back(Cond.FoundElse);
2396 Stream.EmitRecord(PP_CONDITIONAL_STACK, Record);
2400 // Enter the preprocessor block.
2401 Stream.EnterSubblock(PREPROCESSOR_BLOCK_ID, 3);
2403 // If the AST file contains __DATE__ or __TIME__ emit a warning about this.
2404 // FIXME: Include a location for the use, and say which one was used.
2405 if (PP.SawDateOrTime())
2406 PP.Diag(SourceLocation(), diag::warn_module_uses_date_time) << IsModule;
2408 // Loop over all the macro directives that are live at the end of the file,
2409 // emitting each to the PP section.
2411 // Construct the list of identifiers with macro directives that need to be
2413 SmallVector<const IdentifierInfo *, 128> MacroIdentifiers;
2414 for (auto &Id : PP.getIdentifierTable())
2415 if (Id.second->hadMacroDefinition() &&
2416 (!Id.second->isFromAST() ||
2417 Id.second->hasChangedSinceDeserialization()))
2418 MacroIdentifiers.push_back(Id.second);
2419 // Sort the set of macro definitions that need to be serialized by the
2420 // name of the macro, to provide a stable ordering.
2421 std::sort(MacroIdentifiers.begin(), MacroIdentifiers.end(),
2422 llvm::less_ptr<IdentifierInfo>());
2424 // Emit the macro directives as a list and associate the offset with the
2425 // identifier they belong to.
2426 for (const IdentifierInfo *Name : MacroIdentifiers) {
2427 MacroDirective *MD = PP.getLocalMacroDirectiveHistory(Name);
2428 auto StartOffset = Stream.GetCurrentBitNo();
2430 // Emit the macro directives in reverse source order.
2431 for (; MD; MD = MD->getPrevious()) {
2432 // Once we hit an ignored macro, we're done: the rest of the chain
2433 // will all be ignored macros.
2434 if (shouldIgnoreMacro(MD, IsModule, PP))
2437 AddSourceLocation(MD->getLocation(), Record);
2438 Record.push_back(MD->getKind());
2439 if (auto *DefMD = dyn_cast<DefMacroDirective>(MD)) {
2440 Record.push_back(getMacroRef(DefMD->getInfo(), Name));
2441 } else if (auto *VisMD = dyn_cast<VisibilityMacroDirective>(MD)) {
2442 Record.push_back(VisMD->isPublic());
2446 // Write out any exported module macros.
2447 bool EmittedModuleMacros = false;
2448 // We write out exported module macros for PCH as well.
2449 auto Leafs = PP.getLeafModuleMacros(Name);
2450 SmallVector<ModuleMacro*, 8> Worklist(Leafs.begin(), Leafs.end());
2451 llvm::DenseMap<ModuleMacro*, unsigned> Visits;
2452 while (!Worklist.empty()) {
2453 auto *Macro = Worklist.pop_back_val();
2455 // Emit a record indicating this submodule exports this macro.
2456 ModuleMacroRecord.push_back(
2457 getSubmoduleID(Macro->getOwningModule()));
2458 ModuleMacroRecord.push_back(getMacroRef(Macro->getMacroInfo(), Name));
2459 for (auto *M : Macro->overrides())
2460 ModuleMacroRecord.push_back(getSubmoduleID(M->getOwningModule()));
2462 Stream.EmitRecord(PP_MODULE_MACRO, ModuleMacroRecord);
2463 ModuleMacroRecord.clear();
2465 // Enqueue overridden macros once we've visited all their ancestors.
2466 for (auto *M : Macro->overrides())
2467 if (++Visits[M] == M->getNumOverridingMacros())
2468 Worklist.push_back(M);
2470 EmittedModuleMacros = true;
2473 if (Record.empty() && !EmittedModuleMacros)
2476 IdentMacroDirectivesOffsetMap[Name] = StartOffset;
2477 Stream.EmitRecord(PP_MACRO_DIRECTIVE_HISTORY, Record);
2481 /// \brief Offsets of each of the macros into the bitstream, indexed by
2482 /// the local macro ID
2484 /// For each identifier that is associated with a macro, this map
2485 /// provides the offset into the bitstream where that macro is
2487 std::vector<uint32_t> MacroOffsets;
2489 for (unsigned I = 0, N = MacroInfosToEmit.size(); I != N; ++I) {
2490 const IdentifierInfo *Name = MacroInfosToEmit[I].Name;
2491 MacroInfo *MI = MacroInfosToEmit[I].MI;
2492 MacroID ID = MacroInfosToEmit[I].ID;
2494 if (ID < FirstMacroID) {
2495 assert(0 && "Loaded MacroInfo entered MacroInfosToEmit ?");
2499 // Record the local offset of this macro.
2500 unsigned Index = ID - FirstMacroID;
2501 if (Index == MacroOffsets.size())
2502 MacroOffsets.push_back(Stream.GetCurrentBitNo());
2504 if (Index > MacroOffsets.size())
2505 MacroOffsets.resize(Index + 1);
2507 MacroOffsets[Index] = Stream.GetCurrentBitNo();
2510 AddIdentifierRef(Name, Record);
2511 AddSourceLocation(MI->getDefinitionLoc(), Record);
2512 AddSourceLocation(MI->getDefinitionEndLoc(), Record);
2513 Record.push_back(MI->isUsed());
2514 Record.push_back(MI->isUsedForHeaderGuard());
2516 if (MI->isObjectLike()) {
2517 Code = PP_MACRO_OBJECT_LIKE;
2519 Code = PP_MACRO_FUNCTION_LIKE;
2521 Record.push_back(MI->isC99Varargs());
2522 Record.push_back(MI->isGNUVarargs());
2523 Record.push_back(MI->hasCommaPasting());
2524 Record.push_back(MI->getNumParams());
2525 for (const IdentifierInfo *Param : MI->params())
2526 AddIdentifierRef(Param, Record);
2529 // If we have a detailed preprocessing record, record the macro definition
2530 // ID that corresponds to this macro.
2532 Record.push_back(MacroDefinitions[PPRec->findMacroDefinition(MI)]);
2534 Stream.EmitRecord(Code, Record);
2537 // Emit the tokens array.
2538 for (unsigned TokNo = 0, e = MI->getNumTokens(); TokNo != e; ++TokNo) {
2539 // Note that we know that the preprocessor does not have any annotation
2540 // tokens in it because they are created by the parser, and thus can't
2541 // be in a macro definition.
2542 const Token &Tok = MI->getReplacementToken(TokNo);
2543 AddToken(Tok, Record);
2544 Stream.EmitRecord(PP_TOKEN, Record);
2552 // Write the offsets table for macro IDs.
2553 using namespace llvm;
2555 auto Abbrev = std::make_shared<BitCodeAbbrev>();
2556 Abbrev->Add(BitCodeAbbrevOp(MACRO_OFFSET));
2557 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // # of macros
2558 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // first ID
2559 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
2561 unsigned MacroOffsetAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
2563 RecordData::value_type Record[] = {MACRO_OFFSET, MacroOffsets.size(),
2564 FirstMacroID - NUM_PREDEF_MACRO_IDS};
2565 Stream.EmitRecordWithBlob(MacroOffsetAbbrev, Record, bytes(MacroOffsets));
2569 void ASTWriter::WritePreprocessorDetail(PreprocessingRecord &PPRec) {
2570 if (PPRec.local_begin() == PPRec.local_end())
2573 SmallVector<PPEntityOffset, 64> PreprocessedEntityOffsets;
2575 // Enter the preprocessor block.
2576 Stream.EnterSubblock(PREPROCESSOR_DETAIL_BLOCK_ID, 3);
2578 // If the preprocessor has a preprocessing record, emit it.
2579 unsigned NumPreprocessingRecords = 0;
2580 using namespace llvm;
2582 // Set up the abbreviation for
2583 unsigned InclusionAbbrev = 0;
2585 auto Abbrev = std::make_shared<BitCodeAbbrev>();
2586 Abbrev->Add(BitCodeAbbrevOp(PPD_INCLUSION_DIRECTIVE));
2587 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // filename length
2588 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // in quotes
2589 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 2)); // kind
2590 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // imported module
2591 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
2592 InclusionAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
2595 unsigned FirstPreprocessorEntityID
2596 = (Chain ? PPRec.getNumLoadedPreprocessedEntities() : 0)
2597 + NUM_PREDEF_PP_ENTITY_IDS;
2598 unsigned NextPreprocessorEntityID = FirstPreprocessorEntityID;
2600 for (PreprocessingRecord::iterator E = PPRec.local_begin(),
2601 EEnd = PPRec.local_end();
2603 (void)++E, ++NumPreprocessingRecords, ++NextPreprocessorEntityID) {
2606 PreprocessedEntityOffsets.push_back(
2607 PPEntityOffset((*E)->getSourceRange(), Stream.GetCurrentBitNo()));
2609 if (auto *MD = dyn_cast<MacroDefinitionRecord>(*E)) {
2610 // Record this macro definition's ID.
2611 MacroDefinitions[MD] = NextPreprocessorEntityID;
2613 AddIdentifierRef(MD->getName(), Record);
2614 Stream.EmitRecord(PPD_MACRO_DEFINITION, Record);
2618 if (auto *ME = dyn_cast<MacroExpansion>(*E)) {
2619 Record.push_back(ME->isBuiltinMacro());
2620 if (ME->isBuiltinMacro())
2621 AddIdentifierRef(ME->getName(), Record);
2623 Record.push_back(MacroDefinitions[ME->getDefinition()]);
2624 Stream.EmitRecord(PPD_MACRO_EXPANSION, Record);
2628 if (auto *ID = dyn_cast<InclusionDirective>(*E)) {
2629 Record.push_back(PPD_INCLUSION_DIRECTIVE);
2630 Record.push_back(ID->getFileName().size());
2631 Record.push_back(ID->wasInQuotes());
2632 Record.push_back(static_cast<unsigned>(ID->getKind()));
2633 Record.push_back(ID->importedModule());
2634 SmallString<64> Buffer;
2635 Buffer += ID->getFileName();
2636 // Check that the FileEntry is not null because it was not resolved and
2637 // we create a PCH even with compiler errors.
2639 Buffer += ID->getFile()->getName();
2640 Stream.EmitRecordWithBlob(InclusionAbbrev, Record, Buffer);
2644 llvm_unreachable("Unhandled PreprocessedEntity in ASTWriter");
2648 // Write the offsets table for the preprocessing record.
2649 if (NumPreprocessingRecords > 0) {
2650 assert(PreprocessedEntityOffsets.size() == NumPreprocessingRecords);
2652 // Write the offsets table for identifier IDs.
2653 using namespace llvm;
2655 auto Abbrev = std::make_shared<BitCodeAbbrev>();
2656 Abbrev->Add(BitCodeAbbrevOp(PPD_ENTITIES_OFFSETS));
2657 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // first pp entity
2658 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
2659 unsigned PPEOffsetAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
2661 RecordData::value_type Record[] = {PPD_ENTITIES_OFFSETS,
2662 FirstPreprocessorEntityID -
2663 NUM_PREDEF_PP_ENTITY_IDS};
2664 Stream.EmitRecordWithBlob(PPEOffsetAbbrev, Record,
2665 bytes(PreprocessedEntityOffsets));
2669 unsigned ASTWriter::getLocalOrImportedSubmoduleID(Module *Mod) {
2673 llvm::DenseMap<Module *, unsigned>::iterator Known = SubmoduleIDs.find(Mod);
2674 if (Known != SubmoduleIDs.end())
2675 return Known->second;
2677 auto *Top = Mod->getTopLevelModule();
2678 if (Top != WritingModule &&
2679 (getLangOpts().CompilingPCH ||
2680 !Top->fullModuleNameIs(StringRef(getLangOpts().CurrentModule))))
2683 return SubmoduleIDs[Mod] = NextSubmoduleID++;
2686 unsigned ASTWriter::getSubmoduleID(Module *Mod) {
2687 // FIXME: This can easily happen, if we have a reference to a submodule that
2688 // did not result in us loading a module file for that submodule. For
2689 // instance, a cross-top-level-module 'conflict' declaration will hit this.
2690 unsigned ID = getLocalOrImportedSubmoduleID(Mod);
2691 assert((ID || !Mod) &&
2692 "asked for module ID for non-local, non-imported module");
2696 /// \brief Compute the number of modules within the given tree (including the
2698 static unsigned getNumberOfModules(Module *Mod) {
2699 unsigned ChildModules = 0;
2700 for (auto Sub = Mod->submodule_begin(), SubEnd = Mod->submodule_end();
2701 Sub != SubEnd; ++Sub)
2702 ChildModules += getNumberOfModules(*Sub);
2704 return ChildModules + 1;
2707 void ASTWriter::WriteSubmodules(Module *WritingModule) {
2708 // Enter the submodule description block.
2709 Stream.EnterSubblock(SUBMODULE_BLOCK_ID, /*bits for abbreviations*/5);
2711 // Write the abbreviations needed for the submodules block.
2712 using namespace llvm;
2714 auto Abbrev = std::make_shared<BitCodeAbbrev>();
2715 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_DEFINITION));
2716 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ID
2717 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Parent
2718 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsFramework
2719 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsExplicit
2720 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsSystem
2721 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsExternC
2722 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // InferSubmodules...
2723 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // InferExplicit...
2724 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // InferExportWild...
2725 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // ConfigMacrosExh...
2726 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2727 unsigned DefinitionAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
2729 Abbrev = std::make_shared<BitCodeAbbrev>();
2730 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_UMBRELLA_HEADER));
2731 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2732 unsigned UmbrellaAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
2734 Abbrev = std::make_shared<BitCodeAbbrev>();
2735 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_HEADER));
2736 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2737 unsigned HeaderAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
2739 Abbrev = std::make_shared<BitCodeAbbrev>();
2740 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_TOPHEADER));
2741 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2742 unsigned TopHeaderAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
2744 Abbrev = std::make_shared<BitCodeAbbrev>();
2745 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_UMBRELLA_DIR));
2746 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2747 unsigned UmbrellaDirAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
2749 Abbrev = std::make_shared<BitCodeAbbrev>();
2750 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_REQUIRES));
2751 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // State
2752 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Feature
2753 unsigned RequiresAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
2755 Abbrev = std::make_shared<BitCodeAbbrev>();
2756 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_EXCLUDED_HEADER));
2757 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2758 unsigned ExcludedHeaderAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
2760 Abbrev = std::make_shared<BitCodeAbbrev>();
2761 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_TEXTUAL_HEADER));
2762 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2763 unsigned TextualHeaderAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
2765 Abbrev = std::make_shared<BitCodeAbbrev>();
2766 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_PRIVATE_HEADER));
2767 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2768 unsigned PrivateHeaderAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
2770 Abbrev = std::make_shared<BitCodeAbbrev>();
2771 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_PRIVATE_TEXTUAL_HEADER));
2772 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2773 unsigned PrivateTextualHeaderAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
2775 Abbrev = std::make_shared<BitCodeAbbrev>();
2776 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_LINK_LIBRARY));
2777 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // IsFramework
2778 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Name
2779 unsigned LinkLibraryAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
2781 Abbrev = std::make_shared<BitCodeAbbrev>();
2782 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_CONFIG_MACRO));
2783 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Macro name
2784 unsigned ConfigMacroAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
2786 Abbrev = std::make_shared<BitCodeAbbrev>();
2787 Abbrev->Add(BitCodeAbbrevOp(SUBMODULE_CONFLICT));
2788 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Other module
2789 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Message
2790 unsigned ConflictAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
2792 // Write the submodule metadata block.
2793 RecordData::value_type Record[] = {
2794 getNumberOfModules(WritingModule),
2795 FirstSubmoduleID - NUM_PREDEF_SUBMODULE_IDS,
2796 (unsigned)WritingModule->Kind};
2797 Stream.EmitRecord(SUBMODULE_METADATA, Record);
2799 // Write all of the submodules.
2800 std::queue<Module *> Q;
2801 Q.push(WritingModule);
2802 while (!Q.empty()) {
2803 Module *Mod = Q.front();
2805 unsigned ID = getSubmoduleID(Mod);
2807 uint64_t ParentID = 0;
2809 assert(SubmoduleIDs[Mod->Parent] && "Submodule parent not written?");
2810 ParentID = SubmoduleIDs[Mod->Parent];
2813 // Emit the definition of the block.
2815 RecordData::value_type Record[] = {SUBMODULE_DEFINITION,
2822 Mod->InferSubmodules,
2823 Mod->InferExplicitSubmodules,
2824 Mod->InferExportWildcard,
2825 Mod->ConfigMacrosExhaustive};
2826 Stream.EmitRecordWithBlob(DefinitionAbbrev, Record, Mod->Name);
2829 // Emit the requirements.
2830 for (const auto &R : Mod->Requirements) {
2831 RecordData::value_type Record[] = {SUBMODULE_REQUIRES, R.second};
2832 Stream.EmitRecordWithBlob(RequiresAbbrev, Record, R.first);
2835 // Emit the umbrella header, if there is one.
2836 if (auto UmbrellaHeader = Mod->getUmbrellaHeader()) {
2837 RecordData::value_type Record[] = {SUBMODULE_UMBRELLA_HEADER};
2838 Stream.EmitRecordWithBlob(UmbrellaAbbrev, Record,
2839 UmbrellaHeader.NameAsWritten);
2840 } else if (auto UmbrellaDir = Mod->getUmbrellaDir()) {
2841 RecordData::value_type Record[] = {SUBMODULE_UMBRELLA_DIR};
2842 Stream.EmitRecordWithBlob(UmbrellaDirAbbrev, Record,
2843 UmbrellaDir.NameAsWritten);
2846 // Emit the headers.
2848 unsigned RecordKind;
2850 Module::HeaderKind HeaderKind;
2852 {SUBMODULE_HEADER, HeaderAbbrev, Module::HK_Normal},
2853 {SUBMODULE_TEXTUAL_HEADER, TextualHeaderAbbrev, Module::HK_Textual},
2854 {SUBMODULE_PRIVATE_HEADER, PrivateHeaderAbbrev, Module::HK_Private},
2855 {SUBMODULE_PRIVATE_TEXTUAL_HEADER, PrivateTextualHeaderAbbrev,
2856 Module::HK_PrivateTextual},
2857 {SUBMODULE_EXCLUDED_HEADER, ExcludedHeaderAbbrev, Module::HK_Excluded}
2859 for (auto &HL : HeaderLists) {
2860 RecordData::value_type Record[] = {HL.RecordKind};
2861 for (auto &H : Mod->Headers[HL.HeaderKind])
2862 Stream.EmitRecordWithBlob(HL.Abbrev, Record, H.NameAsWritten);
2865 // Emit the top headers.
2867 auto TopHeaders = Mod->getTopHeaders(PP->getFileManager());
2868 RecordData::value_type Record[] = {SUBMODULE_TOPHEADER};
2869 for (auto *H : TopHeaders)
2870 Stream.EmitRecordWithBlob(TopHeaderAbbrev, Record, H->getName());
2873 // Emit the imports.
2874 if (!Mod->Imports.empty()) {
2876 for (auto *I : Mod->Imports)
2877 Record.push_back(getSubmoduleID(I));
2878 Stream.EmitRecord(SUBMODULE_IMPORTS, Record);
2881 // Emit the exports.
2882 if (!Mod->Exports.empty()) {
2884 for (const auto &E : Mod->Exports) {
2885 // FIXME: This may fail; we don't require that all exported modules
2886 // are local or imported.
2887 Record.push_back(getSubmoduleID(E.getPointer()));
2888 Record.push_back(E.getInt());
2890 Stream.EmitRecord(SUBMODULE_EXPORTS, Record);
2893 //FIXME: How do we emit the 'use'd modules? They may not be submodules.
2894 // Might be unnecessary as use declarations are only used to build the
2897 // Emit the link libraries.
2898 for (const auto &LL : Mod->LinkLibraries) {
2899 RecordData::value_type Record[] = {SUBMODULE_LINK_LIBRARY,
2901 Stream.EmitRecordWithBlob(LinkLibraryAbbrev, Record, LL.Library);
2904 // Emit the conflicts.
2905 for (const auto &C : Mod->Conflicts) {
2906 // FIXME: This may fail; we don't require that all conflicting modules
2907 // are local or imported.
2908 RecordData::value_type Record[] = {SUBMODULE_CONFLICT,
2909 getSubmoduleID(C.Other)};
2910 Stream.EmitRecordWithBlob(ConflictAbbrev, Record, C.Message);
2913 // Emit the configuration macros.
2914 for (const auto &CM : Mod->ConfigMacros) {
2915 RecordData::value_type Record[] = {SUBMODULE_CONFIG_MACRO};
2916 Stream.EmitRecordWithBlob(ConfigMacroAbbrev, Record, CM);
2919 // Emit the initializers, if any.
2921 for (Decl *D : Context->getModuleInitializers(Mod))
2922 Inits.push_back(GetDeclRef(D));
2924 Stream.EmitRecord(SUBMODULE_INITIALIZERS, Inits);
2926 // Queue up the submodules of this module.
2927 for (auto *M : Mod->submodules())
2933 assert((NextSubmoduleID - FirstSubmoduleID ==
2934 getNumberOfModules(WritingModule)) &&
2935 "Wrong # of submodules; found a reference to a non-local, "
2936 "non-imported submodule?");
2939 void ASTWriter::WritePragmaDiagnosticMappings(const DiagnosticsEngine &Diag,
2941 llvm::SmallDenseMap<const DiagnosticsEngine::DiagState *, unsigned, 64>
2943 unsigned CurrID = 0;
2946 auto EncodeDiagStateFlags =
2947 [](const DiagnosticsEngine::DiagState *DS) -> unsigned {
2948 unsigned Result = (unsigned)DS->ExtBehavior;
2950 {(unsigned)DS->IgnoreAllWarnings, (unsigned)DS->EnableAllWarnings,
2951 (unsigned)DS->WarningsAsErrors, (unsigned)DS->ErrorsAsFatal,
2952 (unsigned)DS->SuppressSystemWarnings})
2953 Result = (Result << 1) | Val;
2957 unsigned Flags = EncodeDiagStateFlags(Diag.DiagStatesByLoc.FirstDiagState);
2958 Record.push_back(Flags);
2960 auto AddDiagState = [&](const DiagnosticsEngine::DiagState *State,
2961 bool IncludeNonPragmaStates) {
2962 // Ensure that the diagnostic state wasn't modified since it was created.
2963 // We will not correctly round-trip this information otherwise.
2964 assert(Flags == EncodeDiagStateFlags(State) &&
2965 "diag state flags vary in single AST file");
2967 unsigned &DiagStateID = DiagStateIDMap[State];
2968 Record.push_back(DiagStateID);
2970 if (DiagStateID == 0) {
2971 DiagStateID = ++CurrID;
2973 // Add a placeholder for the number of mappings.
2974 auto SizeIdx = Record.size();
2975 Record.emplace_back();
2976 for (const auto &I : *State) {
2977 if (I.second.isPragma() || IncludeNonPragmaStates) {
2978 Record.push_back(I.first);
2979 Record.push_back(I.second.serialize());
2982 // Update the placeholder.
2983 Record[SizeIdx] = (Record.size() - SizeIdx) / 2;
2987 AddDiagState(Diag.DiagStatesByLoc.FirstDiagState, isModule);
2989 // Reserve a spot for the number of locations with state transitions.
2990 auto NumLocationsIdx = Record.size();
2991 Record.emplace_back();
2993 // Emit the state transitions.
2994 unsigned NumLocations = 0;
2995 for (auto &FileIDAndFile : Diag.DiagStatesByLoc.Files) {
2996 if (!FileIDAndFile.first.isValid() ||
2997 !FileIDAndFile.second.HasLocalTransitions)
3000 AddSourceLocation(Diag.SourceMgr->getLocForStartOfFile(FileIDAndFile.first),
3002 Record.push_back(FileIDAndFile.second.StateTransitions.size());
3003 for (auto &StatePoint : FileIDAndFile.second.StateTransitions) {
3004 Record.push_back(StatePoint.Offset);
3005 AddDiagState(StatePoint.State, false);
3009 // Backpatch the number of locations.
3010 Record[NumLocationsIdx] = NumLocations;
3012 // Emit CurDiagStateLoc. Do it last in order to match source order.
3014 // This also protects against a hypothetical corner case with simulating
3015 // -Werror settings for implicit modules in the ASTReader, where reading
3016 // CurDiagState out of context could change whether warning pragmas are
3017 // treated as errors.
3018 AddSourceLocation(Diag.DiagStatesByLoc.CurDiagStateLoc, Record);
3019 AddDiagState(Diag.DiagStatesByLoc.CurDiagState, false);
3021 Stream.EmitRecord(DIAG_PRAGMA_MAPPINGS, Record);
3024 //===----------------------------------------------------------------------===//
3025 // Type Serialization
3026 //===----------------------------------------------------------------------===//
3028 /// \brief Write the representation of a type to the AST stream.
3029 void ASTWriter::WriteType(QualType T) {
3030 TypeIdx &IdxRef = TypeIdxs[T];
3031 if (IdxRef.getIndex() == 0) // we haven't seen this type before.
3032 IdxRef = TypeIdx(NextTypeID++);
3033 TypeIdx Idx = IdxRef;
3035 assert(Idx.getIndex() >= FirstTypeID && "Re-writing a type from a prior AST");
3039 // Emit the type's representation.
3040 ASTTypeWriter W(*this, Record);
3042 uint64_t Offset = W.Emit();
3044 // Record the offset for this type.
3045 unsigned Index = Idx.getIndex() - FirstTypeID;
3046 if (TypeOffsets.size() == Index)
3047 TypeOffsets.push_back(Offset);
3048 else if (TypeOffsets.size() < Index) {
3049 TypeOffsets.resize(Index + 1);
3050 TypeOffsets[Index] = Offset;
3052 llvm_unreachable("Types emitted in wrong order");
3056 //===----------------------------------------------------------------------===//
3057 // Declaration Serialization
3058 //===----------------------------------------------------------------------===//
3060 /// \brief Write the block containing all of the declaration IDs
3061 /// lexically declared within the given DeclContext.
3063 /// \returns the offset of the DECL_CONTEXT_LEXICAL block within the
3064 /// bistream, or 0 if no block was written.
3065 uint64_t ASTWriter::WriteDeclContextLexicalBlock(ASTContext &Context,
3067 if (DC->decls_empty())
3070 uint64_t Offset = Stream.GetCurrentBitNo();
3071 SmallVector<uint32_t, 128> KindDeclPairs;
3072 for (const auto *D : DC->decls()) {
3073 KindDeclPairs.push_back(D->getKind());
3074 KindDeclPairs.push_back(GetDeclRef(D));
3077 ++NumLexicalDeclContexts;
3078 RecordData::value_type Record[] = {DECL_CONTEXT_LEXICAL};
3079 Stream.EmitRecordWithBlob(DeclContextLexicalAbbrev, Record,
3080 bytes(KindDeclPairs));
3084 void ASTWriter::WriteTypeDeclOffsets() {
3085 using namespace llvm;
3087 // Write the type offsets array
3088 auto Abbrev = std::make_shared<BitCodeAbbrev>();
3089 Abbrev->Add(BitCodeAbbrevOp(TYPE_OFFSET));
3090 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // # of types
3091 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // base type index
3092 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // types block
3093 unsigned TypeOffsetAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
3095 RecordData::value_type Record[] = {TYPE_OFFSET, TypeOffsets.size(),
3096 FirstTypeID - NUM_PREDEF_TYPE_IDS};
3097 Stream.EmitRecordWithBlob(TypeOffsetAbbrev, Record, bytes(TypeOffsets));
3100 // Write the declaration offsets array
3101 Abbrev = std::make_shared<BitCodeAbbrev>();
3102 Abbrev->Add(BitCodeAbbrevOp(DECL_OFFSET));
3103 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // # of declarations
3104 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // base decl ID
3105 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // declarations block
3106 unsigned DeclOffsetAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
3108 RecordData::value_type Record[] = {DECL_OFFSET, DeclOffsets.size(),
3109 FirstDeclID - NUM_PREDEF_DECL_IDS};
3110 Stream.EmitRecordWithBlob(DeclOffsetAbbrev, Record, bytes(DeclOffsets));
3114 void ASTWriter::WriteFileDeclIDsMap() {
3115 using namespace llvm;
3117 SmallVector<std::pair<FileID, DeclIDInFileInfo *>, 64> SortedFileDeclIDs(
3118 FileDeclIDs.begin(), FileDeclIDs.end());
3119 std::sort(SortedFileDeclIDs.begin(), SortedFileDeclIDs.end(),
3120 llvm::less_first());
3122 // Join the vectors of DeclIDs from all files.
3123 SmallVector<DeclID, 256> FileGroupedDeclIDs;
3124 for (auto &FileDeclEntry : SortedFileDeclIDs) {
3125 DeclIDInFileInfo &Info = *FileDeclEntry.second;
3126 Info.FirstDeclIndex = FileGroupedDeclIDs.size();
3127 for (auto &LocDeclEntry : Info.DeclIDs)
3128 FileGroupedDeclIDs.push_back(LocDeclEntry.second);
3131 auto Abbrev = std::make_shared<BitCodeAbbrev>();
3132 Abbrev->Add(BitCodeAbbrevOp(FILE_SORTED_DECLS));
3133 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
3134 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
3135 unsigned AbbrevCode = Stream.EmitAbbrev(std::move(Abbrev));
3136 RecordData::value_type Record[] = {FILE_SORTED_DECLS,
3137 FileGroupedDeclIDs.size()};
3138 Stream.EmitRecordWithBlob(AbbrevCode, Record, bytes(FileGroupedDeclIDs));
3141 void ASTWriter::WriteComments() {
3142 Stream.EnterSubblock(COMMENTS_BLOCK_ID, 3);
3143 ArrayRef<RawComment *> RawComments = Context->Comments.getComments();
3145 for (const auto *I : RawComments) {
3147 AddSourceRange(I->getSourceRange(), Record);
3148 Record.push_back(I->getKind());
3149 Record.push_back(I->isTrailingComment());
3150 Record.push_back(I->isAlmostTrailingComment());
3151 Stream.EmitRecord(COMMENTS_RAW_COMMENT, Record);
3156 //===----------------------------------------------------------------------===//
3157 // Global Method Pool and Selector Serialization
3158 //===----------------------------------------------------------------------===//
3162 // Trait used for the on-disk hash table used in the method pool.
3163 class ASTMethodPoolTrait {
3167 typedef Selector key_type;
3168 typedef key_type key_type_ref;
3172 ObjCMethodList Instance, Factory;
3174 typedef const data_type& data_type_ref;
3176 typedef unsigned hash_value_type;
3177 typedef unsigned offset_type;
3179 explicit ASTMethodPoolTrait(ASTWriter &Writer) : Writer(Writer) { }
3181 static hash_value_type ComputeHash(Selector Sel) {
3182 return serialization::ComputeHash(Sel);
3185 std::pair<unsigned,unsigned>
3186 EmitKeyDataLength(raw_ostream& Out, Selector Sel,
3187 data_type_ref Methods) {
3188 using namespace llvm::support;
3189 endian::Writer<little> LE(Out);
3190 unsigned KeyLen = 2 + (Sel.getNumArgs()? Sel.getNumArgs() * 4 : 4);
3191 LE.write<uint16_t>(KeyLen);
3192 unsigned DataLen = 4 + 2 + 2; // 2 bytes for each of the method counts
3193 for (const ObjCMethodList *Method = &Methods.Instance; Method;
3194 Method = Method->getNext())
3195 if (Method->getMethod())
3197 for (const ObjCMethodList *Method = &Methods.Factory; Method;
3198 Method = Method->getNext())
3199 if (Method->getMethod())
3201 LE.write<uint16_t>(DataLen);
3202 return std::make_pair(KeyLen, DataLen);
3205 void EmitKey(raw_ostream& Out, Selector Sel, unsigned) {
3206 using namespace llvm::support;
3207 endian::Writer<little> LE(Out);
3208 uint64_t Start = Out.tell();
3209 assert((Start >> 32) == 0 && "Selector key offset too large");
3210 Writer.SetSelectorOffset(Sel, Start);
3211 unsigned N = Sel.getNumArgs();
3212 LE.write<uint16_t>(N);
3215 for (unsigned I = 0; I != N; ++I)
3217 Writer.getIdentifierRef(Sel.getIdentifierInfoForSlot(I)));
3220 void EmitData(raw_ostream& Out, key_type_ref,
3221 data_type_ref Methods, unsigned DataLen) {
3222 using namespace llvm::support;
3223 endian::Writer<little> LE(Out);
3224 uint64_t Start = Out.tell(); (void)Start;
3225 LE.write<uint32_t>(Methods.ID);
3226 unsigned NumInstanceMethods = 0;
3227 for (const ObjCMethodList *Method = &Methods.Instance; Method;
3228 Method = Method->getNext())
3229 if (Method->getMethod())
3230 ++NumInstanceMethods;
3232 unsigned NumFactoryMethods = 0;
3233 for (const ObjCMethodList *Method = &Methods.Factory; Method;
3234 Method = Method->getNext())
3235 if (Method->getMethod())
3236 ++NumFactoryMethods;
3238 unsigned InstanceBits = Methods.Instance.getBits();
3239 assert(InstanceBits < 4);
3240 unsigned InstanceHasMoreThanOneDeclBit =
3241 Methods.Instance.hasMoreThanOneDecl();
3242 unsigned FullInstanceBits = (NumInstanceMethods << 3) |
3243 (InstanceHasMoreThanOneDeclBit << 2) |
3245 unsigned FactoryBits = Methods.Factory.getBits();
3246 assert(FactoryBits < 4);
3247 unsigned FactoryHasMoreThanOneDeclBit =
3248 Methods.Factory.hasMoreThanOneDecl();
3249 unsigned FullFactoryBits = (NumFactoryMethods << 3) |
3250 (FactoryHasMoreThanOneDeclBit << 2) |
3252 LE.write<uint16_t>(FullInstanceBits);
3253 LE.write<uint16_t>(FullFactoryBits);
3254 for (const ObjCMethodList *Method = &Methods.Instance; Method;
3255 Method = Method->getNext())
3256 if (Method->getMethod())
3257 LE.write<uint32_t>(Writer.getDeclID(Method->getMethod()));
3258 for (const ObjCMethodList *Method = &Methods.Factory; Method;
3259 Method = Method->getNext())
3260 if (Method->getMethod())
3261 LE.write<uint32_t>(Writer.getDeclID(Method->getMethod()));
3263 assert(Out.tell() - Start == DataLen && "Data length is wrong");
3267 } // end anonymous namespace
3269 /// \brief Write ObjC data: selectors and the method pool.
3271 /// The method pool contains both instance and factory methods, stored
3272 /// in an on-disk hash table indexed by the selector. The hash table also
3273 /// contains an empty entry for every other selector known to Sema.
3274 void ASTWriter::WriteSelectors(Sema &SemaRef) {
3275 using namespace llvm;
3277 // Do we have to do anything at all?
3278 if (SemaRef.MethodPool.empty() && SelectorIDs.empty())
3280 unsigned NumTableEntries = 0;
3281 // Create and write out the blob that contains selectors and the method pool.
3283 llvm::OnDiskChainedHashTableGenerator<ASTMethodPoolTrait> Generator;
3284 ASTMethodPoolTrait Trait(*this);
3286 // Create the on-disk hash table representation. We walk through every
3287 // selector we've seen and look it up in the method pool.
3288 SelectorOffsets.resize(NextSelectorID - FirstSelectorID);
3289 for (auto &SelectorAndID : SelectorIDs) {
3290 Selector S = SelectorAndID.first;
3291 SelectorID ID = SelectorAndID.second;
3292 Sema::GlobalMethodPool::iterator F = SemaRef.MethodPool.find(S);
3293 ASTMethodPoolTrait::data_type Data = {
3298 if (F != SemaRef.MethodPool.end()) {
3299 Data.Instance = F->second.first;
3300 Data.Factory = F->second.second;
3302 // Only write this selector if it's not in an existing AST or something
3304 if (Chain && ID < FirstSelectorID) {
3305 // Selector already exists. Did it change?
3306 bool changed = false;
3307 for (ObjCMethodList *M = &Data.Instance;
3308 !changed && M && M->getMethod(); M = M->getNext()) {
3309 if (!M->getMethod()->isFromASTFile())
3312 for (ObjCMethodList *M = &Data.Factory; !changed && M && M->getMethod();
3314 if (!M->getMethod()->isFromASTFile())
3319 } else if (Data.Instance.getMethod() || Data.Factory.getMethod()) {
3320 // A new method pool entry.
3323 Generator.insert(S, Data, Trait);
3326 // Create the on-disk hash table in a buffer.
3327 SmallString<4096> MethodPool;
3328 uint32_t BucketOffset;
3330 using namespace llvm::support;
3331 ASTMethodPoolTrait Trait(*this);
3332 llvm::raw_svector_ostream Out(MethodPool);
3333 // Make sure that no bucket is at offset 0
3334 endian::Writer<little>(Out).write<uint32_t>(0);
3335 BucketOffset = Generator.Emit(Out, Trait);
3338 // Create a blob abbreviation
3339 auto Abbrev = std::make_shared<BitCodeAbbrev>();
3340 Abbrev->Add(BitCodeAbbrevOp(METHOD_POOL));
3341 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
3342 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
3343 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
3344 unsigned MethodPoolAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
3346 // Write the method pool
3348 RecordData::value_type Record[] = {METHOD_POOL, BucketOffset,
3350 Stream.EmitRecordWithBlob(MethodPoolAbbrev, Record, MethodPool);
3353 // Create a blob abbreviation for the selector table offsets.
3354 Abbrev = std::make_shared<BitCodeAbbrev>();
3355 Abbrev->Add(BitCodeAbbrevOp(SELECTOR_OFFSETS));
3356 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // size
3357 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // first ID
3358 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
3359 unsigned SelectorOffsetAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
3361 // Write the selector offsets table.
3363 RecordData::value_type Record[] = {
3364 SELECTOR_OFFSETS, SelectorOffsets.size(),
3365 FirstSelectorID - NUM_PREDEF_SELECTOR_IDS};
3366 Stream.EmitRecordWithBlob(SelectorOffsetAbbrev, Record,
3367 bytes(SelectorOffsets));
3372 /// \brief Write the selectors referenced in @selector expression into AST file.
3373 void ASTWriter::WriteReferencedSelectorsPool(Sema &SemaRef) {
3374 using namespace llvm;
3375 if (SemaRef.ReferencedSelectors.empty())
3379 ASTRecordWriter Writer(*this, Record);
3381 // Note: this writes out all references even for a dependent AST. But it is
3382 // very tricky to fix, and given that @selector shouldn't really appear in
3383 // headers, probably not worth it. It's not a correctness issue.
3384 for (auto &SelectorAndLocation : SemaRef.ReferencedSelectors) {
3385 Selector Sel = SelectorAndLocation.first;
3386 SourceLocation Loc = SelectorAndLocation.second;
3387 Writer.AddSelectorRef(Sel);
3388 Writer.AddSourceLocation(Loc);
3390 Writer.Emit(REFERENCED_SELECTOR_POOL);
3393 //===----------------------------------------------------------------------===//
3394 // Identifier Table Serialization
3395 //===----------------------------------------------------------------------===//
3397 /// Determine the declaration that should be put into the name lookup table to
3398 /// represent the given declaration in this module. This is usually D itself,
3399 /// but if D was imported and merged into a local declaration, we want the most
3400 /// recent local declaration instead. The chosen declaration will be the most
3401 /// recent declaration in any module that imports this one.
3402 static NamedDecl *getDeclForLocalLookup(const LangOptions &LangOpts,
3404 if (!LangOpts.Modules || !D->isFromASTFile())
3407 if (Decl *Redecl = D->getPreviousDecl()) {
3408 // For Redeclarable decls, a prior declaration might be local.
3409 for (; Redecl; Redecl = Redecl->getPreviousDecl()) {
3410 // If we find a local decl, we're done.
3411 if (!Redecl->isFromASTFile()) {
3412 // Exception: in very rare cases (for injected-class-names), not all
3413 // redeclarations are in the same semantic context. Skip ones in a
3414 // different context. They don't go in this lookup table at all.
3415 if (!Redecl->getDeclContext()->getRedeclContext()->Equals(
3416 D->getDeclContext()->getRedeclContext()))
3418 return cast<NamedDecl>(Redecl);
3421 // If we find a decl from a (chained-)PCH stop since we won't find a
3423 if (Redecl->getOwningModuleID() == 0)
3426 } else if (Decl *First = D->getCanonicalDecl()) {
3427 // For Mergeable decls, the first decl might be local.
3428 if (!First->isFromASTFile())
3429 return cast<NamedDecl>(First);
3432 // All declarations are imported. Our most recent declaration will also be
3433 // the most recent one in anyone who imports us.
3439 class ASTIdentifierTableTrait {
3442 IdentifierResolver &IdResolver;
3445 ASTWriter::RecordData *InterestingIdentifierOffsets;
3447 /// \brief Determines whether this is an "interesting" identifier that needs a
3448 /// full IdentifierInfo structure written into the hash table. Notably, this
3449 /// doesn't check whether the name has macros defined; use PublicMacroIterator
3451 bool isInterestingIdentifier(const IdentifierInfo *II, uint64_t MacroOffset) {
3454 (IsModule ? II->hasRevertedBuiltin() : II->getObjCOrBuiltinID()) ||
3455 II->hasRevertedTokenIDToIdentifier() ||
3456 (NeedDecls && II->getFETokenInfo<void>()))
3463 typedef IdentifierInfo* key_type;
3464 typedef key_type key_type_ref;
3466 typedef IdentID data_type;
3467 typedef data_type data_type_ref;
3469 typedef unsigned hash_value_type;
3470 typedef unsigned offset_type;
3472 ASTIdentifierTableTrait(ASTWriter &Writer, Preprocessor &PP,
3473 IdentifierResolver &IdResolver, bool IsModule,
3474 ASTWriter::RecordData *InterestingIdentifierOffsets)
3475 : Writer(Writer), PP(PP), IdResolver(IdResolver), IsModule(IsModule),
3476 NeedDecls(!IsModule || !Writer.getLangOpts().CPlusPlus),
3477 InterestingIdentifierOffsets(InterestingIdentifierOffsets) {}
3479 bool needDecls() const { return NeedDecls; }
3481 static hash_value_type ComputeHash(const IdentifierInfo* II) {
3482 return llvm::HashString(II->getName());
3485 bool isInterestingIdentifier(const IdentifierInfo *II) {
3486 auto MacroOffset = Writer.getMacroDirectivesOffset(II);
3487 return isInterestingIdentifier(II, MacroOffset);
3490 bool isInterestingNonMacroIdentifier(const IdentifierInfo *II) {
3491 return isInterestingIdentifier(II, 0);
3494 std::pair<unsigned,unsigned>
3495 EmitKeyDataLength(raw_ostream& Out, IdentifierInfo* II, IdentID ID) {
3496 unsigned KeyLen = II->getLength() + 1;
3497 unsigned DataLen = 4; // 4 bytes for the persistent ID << 1
3498 auto MacroOffset = Writer.getMacroDirectivesOffset(II);
3499 if (isInterestingIdentifier(II, MacroOffset)) {
3500 DataLen += 2; // 2 bytes for builtin ID
3501 DataLen += 2; // 2 bytes for flags
3503 DataLen += 4; // MacroDirectives offset.
3506 for (IdentifierResolver::iterator D = IdResolver.begin(II),
3507 DEnd = IdResolver.end();
3512 using namespace llvm::support;
3513 endian::Writer<little> LE(Out);
3515 assert((uint16_t)DataLen == DataLen && (uint16_t)KeyLen == KeyLen);
3516 LE.write<uint16_t>(DataLen);
3517 // We emit the key length after the data length so that every
3518 // string is preceded by a 16-bit length. This matches the PTH
3519 // format for storing identifiers.
3520 LE.write<uint16_t>(KeyLen);
3521 return std::make_pair(KeyLen, DataLen);
3524 void EmitKey(raw_ostream& Out, const IdentifierInfo* II,
3526 // Record the location of the key data. This is used when generating
3527 // the mapping from persistent IDs to strings.
3528 Writer.SetIdentifierOffset(II, Out.tell());
3530 // Emit the offset of the key/data length information to the interesting
3531 // identifiers table if necessary.
3532 if (InterestingIdentifierOffsets && isInterestingIdentifier(II))
3533 InterestingIdentifierOffsets->push_back(Out.tell() - 4);
3535 Out.write(II->getNameStart(), KeyLen);
3538 void EmitData(raw_ostream& Out, IdentifierInfo* II,
3539 IdentID ID, unsigned) {
3540 using namespace llvm::support;
3541 endian::Writer<little> LE(Out);
3543 auto MacroOffset = Writer.getMacroDirectivesOffset(II);
3544 if (!isInterestingIdentifier(II, MacroOffset)) {
3545 LE.write<uint32_t>(ID << 1);
3549 LE.write<uint32_t>((ID << 1) | 0x01);
3550 uint32_t Bits = (uint32_t)II->getObjCOrBuiltinID();
3551 assert((Bits & 0xffff) == Bits && "ObjCOrBuiltinID too big for ASTReader.");
3552 LE.write<uint16_t>(Bits);
3554 bool HadMacroDefinition = MacroOffset != 0;
3555 Bits = (Bits << 1) | unsigned(HadMacroDefinition);
3556 Bits = (Bits << 1) | unsigned(II->isExtensionToken());
3557 Bits = (Bits << 1) | unsigned(II->isPoisoned());
3558 Bits = (Bits << 1) | unsigned(II->hasRevertedBuiltin());
3559 Bits = (Bits << 1) | unsigned(II->hasRevertedTokenIDToIdentifier());
3560 Bits = (Bits << 1) | unsigned(II->isCPlusPlusOperatorKeyword());
3561 LE.write<uint16_t>(Bits);
3563 if (HadMacroDefinition)
3564 LE.write<uint32_t>(MacroOffset);
3567 // Emit the declaration IDs in reverse order, because the
3568 // IdentifierResolver provides the declarations as they would be
3569 // visible (e.g., the function "stat" would come before the struct
3570 // "stat"), but the ASTReader adds declarations to the end of the list
3571 // (so we need to see the struct "stat" before the function "stat").
3572 // Only emit declarations that aren't from a chained PCH, though.
3573 SmallVector<NamedDecl *, 16> Decls(IdResolver.begin(II),
3575 for (SmallVectorImpl<NamedDecl *>::reverse_iterator D = Decls.rbegin(),
3576 DEnd = Decls.rend();
3579 Writer.getDeclID(getDeclForLocalLookup(PP.getLangOpts(), *D)));
3584 } // end anonymous namespace
3586 /// \brief Write the identifier table into the AST file.
3588 /// The identifier table consists of a blob containing string data
3589 /// (the actual identifiers themselves) and a separate "offsets" index
3590 /// that maps identifier IDs to locations within the blob.
3591 void ASTWriter::WriteIdentifierTable(Preprocessor &PP,
3592 IdentifierResolver &IdResolver,
3594 using namespace llvm;
3596 RecordData InterestingIdents;
3598 // Create and write out the blob that contains the identifier
3601 llvm::OnDiskChainedHashTableGenerator<ASTIdentifierTableTrait> Generator;
3602 ASTIdentifierTableTrait Trait(
3603 *this, PP, IdResolver, IsModule,
3604 (getLangOpts().CPlusPlus && IsModule) ? &InterestingIdents : nullptr);
3606 // Look for any identifiers that were named while processing the
3607 // headers, but are otherwise not needed. We add these to the hash
3608 // table to enable checking of the predefines buffer in the case
3609 // where the user adds new macro definitions when building the AST
3611 SmallVector<const IdentifierInfo *, 128> IIs;
3612 for (const auto &ID : PP.getIdentifierTable())
3613 IIs.push_back(ID.second);
3614 // Sort the identifiers lexicographically before getting them references so
3615 // that their order is stable.
3616 std::sort(IIs.begin(), IIs.end(), llvm::less_ptr<IdentifierInfo>());
3617 for (const IdentifierInfo *II : IIs)
3618 if (Trait.isInterestingNonMacroIdentifier(II))
3619 getIdentifierRef(II);
3621 // Create the on-disk hash table representation. We only store offsets
3622 // for identifiers that appear here for the first time.
3623 IdentifierOffsets.resize(NextIdentID - FirstIdentID);
3624 for (auto IdentIDPair : IdentifierIDs) {
3625 auto *II = const_cast<IdentifierInfo *>(IdentIDPair.first);
3626 IdentID ID = IdentIDPair.second;
3627 assert(II && "NULL identifier in identifier table");
3628 // Write out identifiers if either the ID is local or the identifier has
3629 // changed since it was loaded.
3630 if (ID >= FirstIdentID || !Chain || !II->isFromAST()
3631 || II->hasChangedSinceDeserialization() ||
3632 (Trait.needDecls() &&
3633 II->hasFETokenInfoChangedSinceDeserialization()))
3634 Generator.insert(II, ID, Trait);
3637 // Create the on-disk hash table in a buffer.
3638 SmallString<4096> IdentifierTable;
3639 uint32_t BucketOffset;
3641 using namespace llvm::support;
3642 llvm::raw_svector_ostream Out(IdentifierTable);
3643 // Make sure that no bucket is at offset 0
3644 endian::Writer<little>(Out).write<uint32_t>(0);
3645 BucketOffset = Generator.Emit(Out, Trait);
3648 // Create a blob abbreviation
3649 auto Abbrev = std::make_shared<BitCodeAbbrev>();
3650 Abbrev->Add(BitCodeAbbrevOp(IDENTIFIER_TABLE));
3651 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
3652 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
3653 unsigned IDTableAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
3655 // Write the identifier table
3656 RecordData::value_type Record[] = {IDENTIFIER_TABLE, BucketOffset};
3657 Stream.EmitRecordWithBlob(IDTableAbbrev, Record, IdentifierTable);
3660 // Write the offsets table for identifier IDs.
3661 auto Abbrev = std::make_shared<BitCodeAbbrev>();
3662 Abbrev->Add(BitCodeAbbrevOp(IDENTIFIER_OFFSET));
3663 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // # of identifiers
3664 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // first ID
3665 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
3666 unsigned IdentifierOffsetAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
3669 for (unsigned I = 0, N = IdentifierOffsets.size(); I != N; ++I)
3670 assert(IdentifierOffsets[I] && "Missing identifier offset?");
3673 RecordData::value_type Record[] = {IDENTIFIER_OFFSET,
3674 IdentifierOffsets.size(),
3675 FirstIdentID - NUM_PREDEF_IDENT_IDS};
3676 Stream.EmitRecordWithBlob(IdentifierOffsetAbbrev, Record,
3677 bytes(IdentifierOffsets));
3679 // In C++, write the list of interesting identifiers (those that are
3680 // defined as macros, poisoned, or similar unusual things).
3681 if (!InterestingIdents.empty())
3682 Stream.EmitRecord(INTERESTING_IDENTIFIERS, InterestingIdents);
3685 //===----------------------------------------------------------------------===//
3686 // DeclContext's Name Lookup Table Serialization
3687 //===----------------------------------------------------------------------===//
3691 // Trait used for the on-disk hash table used in the method pool.
3692 class ASTDeclContextNameLookupTrait {
3694 llvm::SmallVector<DeclID, 64> DeclIDs;
3697 typedef DeclarationNameKey key_type;
3698 typedef key_type key_type_ref;
3700 /// A start and end index into DeclIDs, representing a sequence of decls.
3701 typedef std::pair<unsigned, unsigned> data_type;
3702 typedef const data_type& data_type_ref;
3704 typedef unsigned hash_value_type;
3705 typedef unsigned offset_type;
3707 explicit ASTDeclContextNameLookupTrait(ASTWriter &Writer) : Writer(Writer) { }
3709 template<typename Coll>
3710 data_type getData(const Coll &Decls) {
3711 unsigned Start = DeclIDs.size();
3712 for (NamedDecl *D : Decls) {
3714 Writer.GetDeclRef(getDeclForLocalLookup(Writer.getLangOpts(), D)));
3716 return std::make_pair(Start, DeclIDs.size());
3719 data_type ImportData(const reader::ASTDeclContextNameLookupTrait::data_type &FromReader) {
3720 unsigned Start = DeclIDs.size();
3721 for (auto ID : FromReader)
3722 DeclIDs.push_back(ID);
3723 return std::make_pair(Start, DeclIDs.size());
3726 static bool EqualKey(key_type_ref a, key_type_ref b) {
3730 hash_value_type ComputeHash(DeclarationNameKey Name) {
3731 return Name.getHash();
3734 void EmitFileRef(raw_ostream &Out, ModuleFile *F) const {
3735 assert(Writer.hasChain() &&
3736 "have reference to loaded module file but no chain?");
3738 using namespace llvm::support;
3739 endian::Writer<little>(Out)
3740 .write<uint32_t>(Writer.getChain()->getModuleFileID(F));
3743 std::pair<unsigned, unsigned> EmitKeyDataLength(raw_ostream &Out,
3744 DeclarationNameKey Name,
3745 data_type_ref Lookup) {
3746 using namespace llvm::support;
3747 endian::Writer<little> LE(Out);
3748 unsigned KeyLen = 1;
3749 switch (Name.getKind()) {
3750 case DeclarationName::Identifier:
3751 case DeclarationName::ObjCZeroArgSelector:
3752 case DeclarationName::ObjCOneArgSelector:
3753 case DeclarationName::ObjCMultiArgSelector:
3754 case DeclarationName::CXXLiteralOperatorName:
3755 case DeclarationName::CXXDeductionGuideName:
3758 case DeclarationName::CXXOperatorName:
3761 case DeclarationName::CXXConstructorName:
3762 case DeclarationName::CXXDestructorName:
3763 case DeclarationName::CXXConversionFunctionName:
3764 case DeclarationName::CXXUsingDirective:
3767 LE.write<uint16_t>(KeyLen);
3769 // 4 bytes for each DeclID.
3770 unsigned DataLen = 4 * (Lookup.second - Lookup.first);
3771 assert(uint16_t(DataLen) == DataLen &&
3772 "too many decls for serialized lookup result");
3773 LE.write<uint16_t>(DataLen);
3775 return std::make_pair(KeyLen, DataLen);
3778 void EmitKey(raw_ostream &Out, DeclarationNameKey Name, unsigned) {
3779 using namespace llvm::support;
3780 endian::Writer<little> LE(Out);
3781 LE.write<uint8_t>(Name.getKind());
3782 switch (Name.getKind()) {
3783 case DeclarationName::Identifier:
3784 case DeclarationName::CXXLiteralOperatorName:
3785 case DeclarationName::CXXDeductionGuideName:
3786 LE.write<uint32_t>(Writer.getIdentifierRef(Name.getIdentifier()));
3788 case DeclarationName::ObjCZeroArgSelector:
3789 case DeclarationName::ObjCOneArgSelector:
3790 case DeclarationName::ObjCMultiArgSelector:
3791 LE.write<uint32_t>(Writer.getSelectorRef(Name.getSelector()));
3793 case DeclarationName::CXXOperatorName:
3794 assert(Name.getOperatorKind() < NUM_OVERLOADED_OPERATORS &&
3795 "Invalid operator?");
3796 LE.write<uint8_t>(Name.getOperatorKind());
3798 case DeclarationName::CXXConstructorName:
3799 case DeclarationName::CXXDestructorName:
3800 case DeclarationName::CXXConversionFunctionName:
3801 case DeclarationName::CXXUsingDirective:
3805 llvm_unreachable("Invalid name kind?");
3808 void EmitData(raw_ostream &Out, key_type_ref, data_type Lookup,
3810 using namespace llvm::support;
3811 endian::Writer<little> LE(Out);
3812 uint64_t Start = Out.tell(); (void)Start;
3813 for (unsigned I = Lookup.first, N = Lookup.second; I != N; ++I)
3814 LE.write<uint32_t>(DeclIDs[I]);
3815 assert(Out.tell() - Start == DataLen && "Data length is wrong");
3819 } // end anonymous namespace
3821 bool ASTWriter::isLookupResultExternal(StoredDeclsList &Result,
3823 return Result.hasExternalDecls() && DC->NeedToReconcileExternalVisibleStorage;
3826 bool ASTWriter::isLookupResultEntirelyExternal(StoredDeclsList &Result,
3828 for (auto *D : Result.getLookupResult())
3829 if (!getDeclForLocalLookup(getLangOpts(), D)->isFromASTFile())
3836 ASTWriter::GenerateNameLookupTable(const DeclContext *ConstDC,
3837 llvm::SmallVectorImpl<char> &LookupTable) {
3838 assert(!ConstDC->HasLazyLocalLexicalLookups &&
3839 !ConstDC->HasLazyExternalLexicalLookups &&
3840 "must call buildLookups first");
3842 // FIXME: We need to build the lookups table, which is logically const.
3843 auto *DC = const_cast<DeclContext*>(ConstDC);
3844 assert(DC == DC->getPrimaryContext() && "only primary DC has lookup table");
3846 // Create the on-disk hash table representation.
3847 MultiOnDiskHashTableGenerator<reader::ASTDeclContextNameLookupTrait,
3848 ASTDeclContextNameLookupTrait> Generator;
3849 ASTDeclContextNameLookupTrait Trait(*this);
3851 // The first step is to collect the declaration names which we need to
3852 // serialize into the name lookup table, and to collect them in a stable
3854 SmallVector<DeclarationName, 16> Names;
3856 // We also build up small sets of the constructor and conversion function
3857 // names which are visible.
3858 llvm::SmallSet<DeclarationName, 8> ConstructorNameSet, ConversionNameSet;
3860 for (auto &Lookup : *DC->buildLookup()) {
3861 auto &Name = Lookup.first;
3862 auto &Result = Lookup.second;
3864 // If there are no local declarations in our lookup result, we
3865 // don't need to write an entry for the name at all. If we can't
3866 // write out a lookup set without performing more deserialization,
3867 // just skip this entry.
3868 if (isLookupResultExternal(Result, DC) &&
3869 isLookupResultEntirelyExternal(Result, DC))
3872 // We also skip empty results. If any of the results could be external and
3873 // the currently available results are empty, then all of the results are
3874 // external and we skip it above. So the only way we get here with an empty
3875 // results is when no results could have been external *and* we have
3876 // external results.
3878 // FIXME: While we might want to start emitting on-disk entries for negative
3879 // lookups into a decl context as an optimization, today we *have* to skip
3880 // them because there are names with empty lookup results in decl contexts
3881 // which we can't emit in any stable ordering: we lookup constructors and
3882 // conversion functions in the enclosing namespace scope creating empty
3883 // results for them. This in almost certainly a bug in Clang's name lookup,
3884 // but that is likely to be hard or impossible to fix and so we tolerate it
3885 // here by omitting lookups with empty results.
3886 if (Lookup.second.getLookupResult().empty())
3889 switch (Lookup.first.getNameKind()) {
3891 Names.push_back(Lookup.first);
3894 case DeclarationName::CXXConstructorName:
3895 assert(isa<CXXRecordDecl>(DC) &&
3896 "Cannot have a constructor name outside of a class!");
3897 ConstructorNameSet.insert(Name);
3900 case DeclarationName::CXXConversionFunctionName:
3901 assert(isa<CXXRecordDecl>(DC) &&
3902 "Cannot have a conversion function name outside of a class!");
3903 ConversionNameSet.insert(Name);
3908 // Sort the names into a stable order.
3909 std::sort(Names.begin(), Names.end());
3911 if (auto *D = dyn_cast<CXXRecordDecl>(DC)) {
3912 // We need to establish an ordering of constructor and conversion function
3913 // names, and they don't have an intrinsic ordering.
3915 // First we try the easy case by forming the current context's constructor
3916 // name and adding that name first. This is a very useful optimization to
3917 // avoid walking the lexical declarations in many cases, and it also
3918 // handles the only case where a constructor name can come from some other
3919 // lexical context -- when that name is an implicit constructor merged from
3920 // another declaration in the redecl chain. Any non-implicit constructor or
3921 // conversion function which doesn't occur in all the lexical contexts
3922 // would be an ODR violation.
3923 auto ImplicitCtorName = Context->DeclarationNames.getCXXConstructorName(
3924 Context->getCanonicalType(Context->getRecordType(D)));
3925 if (ConstructorNameSet.erase(ImplicitCtorName))
3926 Names.push_back(ImplicitCtorName);
3928 // If we still have constructors or conversion functions, we walk all the
3929 // names in the decl and add the constructors and conversion functions
3930 // which are visible in the order they lexically occur within the context.
3931 if (!ConstructorNameSet.empty() || !ConversionNameSet.empty())
3932 for (Decl *ChildD : cast<CXXRecordDecl>(DC)->decls())
3933 if (auto *ChildND = dyn_cast<NamedDecl>(ChildD)) {
3934 auto Name = ChildND->getDeclName();
3935 switch (Name.getNameKind()) {
3939 case DeclarationName::CXXConstructorName:
3940 if (ConstructorNameSet.erase(Name))
3941 Names.push_back(Name);
3944 case DeclarationName::CXXConversionFunctionName:
3945 if (ConversionNameSet.erase(Name))
3946 Names.push_back(Name);
3950 if (ConstructorNameSet.empty() && ConversionNameSet.empty())
3954 assert(ConstructorNameSet.empty() && "Failed to find all of the visible "
3955 "constructors by walking all the "
3956 "lexical members of the context.");
3957 assert(ConversionNameSet.empty() && "Failed to find all of the visible "
3958 "conversion functions by walking all "
3959 "the lexical members of the context.");
3962 // Next we need to do a lookup with each name into this decl context to fully
3963 // populate any results from external sources. We don't actually use the
3964 // results of these lookups because we only want to use the results after all
3965 // results have been loaded and the pointers into them will be stable.
3966 for (auto &Name : Names)
3969 // Now we need to insert the results for each name into the hash table. For
3970 // constructor names and conversion function names, we actually need to merge
3971 // all of the results for them into one list of results each and insert
3973 SmallVector<NamedDecl *, 8> ConstructorDecls;
3974 SmallVector<NamedDecl *, 8> ConversionDecls;
3976 // Now loop over the names, either inserting them or appending for the two
3978 for (auto &Name : Names) {
3979 DeclContext::lookup_result Result = DC->noload_lookup(Name);
3981 switch (Name.getNameKind()) {
3983 Generator.insert(Name, Trait.getData(Result), Trait);
3986 case DeclarationName::CXXConstructorName:
3987 ConstructorDecls.append(Result.begin(), Result.end());
3990 case DeclarationName::CXXConversionFunctionName:
3991 ConversionDecls.append(Result.begin(), Result.end());
3996 // Handle our two special cases if we ended up having any. We arbitrarily use
3997 // the first declaration's name here because the name itself isn't part of
3998 // the key, only the kind of name is used.
3999 if (!ConstructorDecls.empty())
4000 Generator.insert(ConstructorDecls.front()->getDeclName(),
4001 Trait.getData(ConstructorDecls), Trait);
4002 if (!ConversionDecls.empty())
4003 Generator.insert(ConversionDecls.front()->getDeclName(),
4004 Trait.getData(ConversionDecls), Trait);
4006 // Create the on-disk hash table. Also emit the existing imported and
4007 // merged table if there is one.
4008 auto *Lookups = Chain ? Chain->getLoadedLookupTables(DC) : nullptr;
4009 Generator.emit(LookupTable, Trait, Lookups ? &Lookups->Table : nullptr);
4012 /// \brief Write the block containing all of the declaration IDs
4013 /// visible from the given DeclContext.
4015 /// \returns the offset of the DECL_CONTEXT_VISIBLE block within the
4016 /// bitstream, or 0 if no block was written.
4017 uint64_t ASTWriter::WriteDeclContextVisibleBlock(ASTContext &Context,
4019 // If we imported a key declaration of this namespace, write the visible
4020 // lookup results as an update record for it rather than including them
4021 // on this declaration. We will only look at key declarations on reload.
4022 if (isa<NamespaceDecl>(DC) && Chain &&
4023 Chain->getKeyDeclaration(cast<Decl>(DC))->isFromASTFile()) {
4024 // Only do this once, for the first local declaration of the namespace.
4025 for (auto *Prev = cast<NamespaceDecl>(DC)->getPreviousDecl(); Prev;
4026 Prev = Prev->getPreviousDecl())
4027 if (!Prev->isFromASTFile())
4030 // Note that we need to emit an update record for the primary context.
4031 UpdatedDeclContexts.insert(DC->getPrimaryContext());
4033 // Make sure all visible decls are written. They will be recorded later. We
4034 // do this using a side data structure so we can sort the names into
4035 // a deterministic order.
4036 StoredDeclsMap *Map = DC->getPrimaryContext()->buildLookup();
4037 SmallVector<std::pair<DeclarationName, DeclContext::lookup_result>, 16>
4040 LookupResults.reserve(Map->size());
4041 for (auto &Entry : *Map)
4042 LookupResults.push_back(
4043 std::make_pair(Entry.first, Entry.second.getLookupResult()));
4046 std::sort(LookupResults.begin(), LookupResults.end(), llvm::less_first());
4047 for (auto &NameAndResult : LookupResults) {
4048 DeclarationName Name = NameAndResult.first;
4049 DeclContext::lookup_result Result = NameAndResult.second;
4050 if (Name.getNameKind() == DeclarationName::CXXConstructorName ||
4051 Name.getNameKind() == DeclarationName::CXXConversionFunctionName) {
4052 // We have to work around a name lookup bug here where negative lookup
4053 // results for these names get cached in namespace lookup tables (these
4054 // names should never be looked up in a namespace).
4055 assert(Result.empty() && "Cannot have a constructor or conversion "
4056 "function name in a namespace!");
4060 for (NamedDecl *ND : Result)
4061 if (!ND->isFromASTFile())
4068 if (DC->getPrimaryContext() != DC)
4071 // Skip contexts which don't support name lookup.
4072 if (!DC->isLookupContext())
4075 // If not in C++, we perform name lookup for the translation unit via the
4076 // IdentifierInfo chains, don't bother to build a visible-declarations table.
4077 if (DC->isTranslationUnit() && !Context.getLangOpts().CPlusPlus)
4080 // Serialize the contents of the mapping used for lookup. Note that,
4081 // although we have two very different code paths, the serialized
4082 // representation is the same for both cases: a declaration name,
4083 // followed by a size, followed by references to the visible
4084 // declarations that have that name.
4085 uint64_t Offset = Stream.GetCurrentBitNo();
4086 StoredDeclsMap *Map = DC->buildLookup();
4087 if (!Map || Map->empty())
4090 // Create the on-disk hash table in a buffer.
4091 SmallString<4096> LookupTable;
4092 GenerateNameLookupTable(DC, LookupTable);
4094 // Write the lookup table
4095 RecordData::value_type Record[] = {DECL_CONTEXT_VISIBLE};
4096 Stream.EmitRecordWithBlob(DeclContextVisibleLookupAbbrev, Record,
4098 ++NumVisibleDeclContexts;
4102 /// \brief Write an UPDATE_VISIBLE block for the given context.
4104 /// UPDATE_VISIBLE blocks contain the declarations that are added to an existing
4105 /// DeclContext in a dependent AST file. As such, they only exist for the TU
4106 /// (in C++), for namespaces, and for classes with forward-declared unscoped
4107 /// enumeration members (in C++11).
4108 void ASTWriter::WriteDeclContextVisibleUpdate(const DeclContext *DC) {
4109 StoredDeclsMap *Map = DC->getLookupPtr();
4110 if (!Map || Map->empty())
4113 // Create the on-disk hash table in a buffer.
4114 SmallString<4096> LookupTable;
4115 GenerateNameLookupTable(DC, LookupTable);
4117 // If we're updating a namespace, select a key declaration as the key for the
4118 // update record; those are the only ones that will be checked on reload.
4119 if (isa<NamespaceDecl>(DC))
4120 DC = cast<DeclContext>(Chain->getKeyDeclaration(cast<Decl>(DC)));
4122 // Write the lookup table
4123 RecordData::value_type Record[] = {UPDATE_VISIBLE, getDeclID(cast<Decl>(DC))};
4124 Stream.EmitRecordWithBlob(UpdateVisibleAbbrev, Record, LookupTable);
4127 /// \brief Write an FP_PRAGMA_OPTIONS block for the given FPOptions.
4128 void ASTWriter::WriteFPPragmaOptions(const FPOptions &Opts) {
4129 RecordData::value_type Record[] = {Opts.getInt()};
4130 Stream.EmitRecord(FP_PRAGMA_OPTIONS, Record);
4133 /// \brief Write an OPENCL_EXTENSIONS block for the given OpenCLOptions.
4134 void ASTWriter::WriteOpenCLExtensions(Sema &SemaRef) {
4135 if (!SemaRef.Context.getLangOpts().OpenCL)
4138 const OpenCLOptions &Opts = SemaRef.getOpenCLOptions();
4140 for (const auto &I:Opts.OptMap) {
4141 AddString(I.getKey(), Record);
4142 auto V = I.getValue();
4143 Record.push_back(V.Supported ? 1 : 0);
4144 Record.push_back(V.Enabled ? 1 : 0);
4145 Record.push_back(V.Avail);
4146 Record.push_back(V.Core);
4148 Stream.EmitRecord(OPENCL_EXTENSIONS, Record);
4151 void ASTWriter::WriteOpenCLExtensionTypes(Sema &SemaRef) {
4152 if (!SemaRef.Context.getLangOpts().OpenCL)
4156 for (const auto &I : SemaRef.OpenCLTypeExtMap) {
4158 static_cast<unsigned>(getTypeID(I.first->getCanonicalTypeInternal())));
4159 Record.push_back(I.second.size());
4160 for (auto Ext : I.second)
4161 AddString(Ext, Record);
4163 Stream.EmitRecord(OPENCL_EXTENSION_TYPES, Record);
4166 void ASTWriter::WriteOpenCLExtensionDecls(Sema &SemaRef) {
4167 if (!SemaRef.Context.getLangOpts().OpenCL)
4171 for (const auto &I : SemaRef.OpenCLDeclExtMap) {
4172 Record.push_back(getDeclID(I.first));
4173 Record.push_back(static_cast<unsigned>(I.second.size()));
4174 for (auto Ext : I.second)
4175 AddString(Ext, Record);
4177 Stream.EmitRecord(OPENCL_EXTENSION_DECLS, Record);
4180 void ASTWriter::WriteCUDAPragmas(Sema &SemaRef) {
4181 if (SemaRef.ForceCUDAHostDeviceDepth > 0) {
4182 RecordData::value_type Record[] = {SemaRef.ForceCUDAHostDeviceDepth};
4183 Stream.EmitRecord(CUDA_PRAGMA_FORCE_HOST_DEVICE_DEPTH, Record);
4187 void ASTWriter::WriteObjCCategories() {
4188 SmallVector<ObjCCategoriesInfo, 2> CategoriesMap;
4189 RecordData Categories;
4191 for (unsigned I = 0, N = ObjCClassesWithCategories.size(); I != N; ++I) {
4193 unsigned StartIndex = Categories.size();
4195 ObjCInterfaceDecl *Class = ObjCClassesWithCategories[I];
4197 // Allocate space for the size.
4198 Categories.push_back(0);
4200 // Add the categories.
4201 for (ObjCInterfaceDecl::known_categories_iterator
4202 Cat = Class->known_categories_begin(),
4203 CatEnd = Class->known_categories_end();
4204 Cat != CatEnd; ++Cat, ++Size) {
4205 assert(getDeclID(*Cat) != 0 && "Bogus category");
4206 AddDeclRef(*Cat, Categories);
4210 Categories[StartIndex] = Size;
4212 // Record this interface -> category map.
4213 ObjCCategoriesInfo CatInfo = { getDeclID(Class), StartIndex };
4214 CategoriesMap.push_back(CatInfo);
4217 // Sort the categories map by the definition ID, since the reader will be
4218 // performing binary searches on this information.
4219 llvm::array_pod_sort(CategoriesMap.begin(), CategoriesMap.end());
4221 // Emit the categories map.
4222 using namespace llvm;
4224 auto Abbrev = std::make_shared<BitCodeAbbrev>();
4225 Abbrev->Add(BitCodeAbbrevOp(OBJC_CATEGORIES_MAP));
4226 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // # of entries
4227 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
4228 unsigned AbbrevID = Stream.EmitAbbrev(std::move(Abbrev));
4230 RecordData::value_type Record[] = {OBJC_CATEGORIES_MAP, CategoriesMap.size()};
4231 Stream.EmitRecordWithBlob(AbbrevID, Record,
4232 reinterpret_cast<char *>(CategoriesMap.data()),
4233 CategoriesMap.size() * sizeof(ObjCCategoriesInfo));
4235 // Emit the category lists.
4236 Stream.EmitRecord(OBJC_CATEGORIES, Categories);
4239 void ASTWriter::WriteLateParsedTemplates(Sema &SemaRef) {
4240 Sema::LateParsedTemplateMapT &LPTMap = SemaRef.LateParsedTemplateMap;
4246 for (auto &LPTMapEntry : LPTMap) {
4247 const FunctionDecl *FD = LPTMapEntry.first;
4248 LateParsedTemplate &LPT = *LPTMapEntry.second;
4249 AddDeclRef(FD, Record);
4250 AddDeclRef(LPT.D, Record);
4251 Record.push_back(LPT.Toks.size());
4253 for (const auto &Tok : LPT.Toks) {
4254 AddToken(Tok, Record);
4257 Stream.EmitRecord(LATE_PARSED_TEMPLATE, Record);
4260 /// \brief Write the state of 'pragma clang optimize' at the end of the module.
4261 void ASTWriter::WriteOptimizePragmaOptions(Sema &SemaRef) {
4263 SourceLocation PragmaLoc = SemaRef.getOptimizeOffPragmaLocation();
4264 AddSourceLocation(PragmaLoc, Record);
4265 Stream.EmitRecord(OPTIMIZE_PRAGMA_OPTIONS, Record);
4268 /// \brief Write the state of 'pragma ms_struct' at the end of the module.
4269 void ASTWriter::WriteMSStructPragmaOptions(Sema &SemaRef) {
4271 Record.push_back(SemaRef.MSStructPragmaOn ? PMSST_ON : PMSST_OFF);
4272 Stream.EmitRecord(MSSTRUCT_PRAGMA_OPTIONS, Record);
4275 /// \brief Write the state of 'pragma pointers_to_members' at the end of the
4277 void ASTWriter::WriteMSPointersToMembersPragmaOptions(Sema &SemaRef) {
4279 Record.push_back(SemaRef.MSPointerToMemberRepresentationMethod);
4280 AddSourceLocation(SemaRef.ImplicitMSInheritanceAttrLoc, Record);
4281 Stream.EmitRecord(POINTERS_TO_MEMBERS_PRAGMA_OPTIONS, Record);
4284 /// \brief Write the state of 'pragma pack' at the end of the module.
4285 void ASTWriter::WritePackPragmaOptions(Sema &SemaRef) {
4286 // Don't serialize pragma pack state for modules, since it should only take
4287 // effect on a per-submodule basis.
4292 Record.push_back(SemaRef.PackStack.CurrentValue);
4293 AddSourceLocation(SemaRef.PackStack.CurrentPragmaLocation, Record);
4294 Record.push_back(SemaRef.PackStack.Stack.size());
4295 for (const auto &StackEntry : SemaRef.PackStack.Stack) {
4296 Record.push_back(StackEntry.Value);
4297 AddSourceLocation(StackEntry.PragmaLocation, Record);
4298 AddString(StackEntry.StackSlotLabel, Record);
4300 Stream.EmitRecord(PACK_PRAGMA_OPTIONS, Record);
4303 void ASTWriter::WriteModuleFileExtension(Sema &SemaRef,
4304 ModuleFileExtensionWriter &Writer) {
4305 // Enter the extension block.
4306 Stream.EnterSubblock(EXTENSION_BLOCK_ID, 4);
4308 // Emit the metadata record abbreviation.
4309 auto Abv = std::make_shared<llvm::BitCodeAbbrev>();
4310 Abv->Add(llvm::BitCodeAbbrevOp(EXTENSION_METADATA));
4311 Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::VBR, 6));
4312 Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::VBR, 6));
4313 Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::VBR, 6));
4314 Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::VBR, 6));
4315 Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::Blob));
4316 unsigned Abbrev = Stream.EmitAbbrev(std::move(Abv));
4318 // Emit the metadata record.
4320 auto Metadata = Writer.getExtension()->getExtensionMetadata();
4321 Record.push_back(EXTENSION_METADATA);
4322 Record.push_back(Metadata.MajorVersion);
4323 Record.push_back(Metadata.MinorVersion);
4324 Record.push_back(Metadata.BlockName.size());
4325 Record.push_back(Metadata.UserInfo.size());
4326 SmallString<64> Buffer;
4327 Buffer += Metadata.BlockName;
4328 Buffer += Metadata.UserInfo;
4329 Stream.EmitRecordWithBlob(Abbrev, Record, Buffer);
4331 // Emit the contents of the extension block.
4332 Writer.writeExtensionContents(SemaRef, Stream);
4334 // Exit the extension block.
4338 //===----------------------------------------------------------------------===//
4339 // General Serialization Routines
4340 //===----------------------------------------------------------------------===//
4342 /// \brief Emit the list of attributes to the specified record.
4343 void ASTRecordWriter::AddAttributes(ArrayRef<const Attr *> Attrs) {
4344 auto &Record = *this;
4345 Record.push_back(Attrs.size());
4346 for (const auto *A : Attrs) {
4347 Record.push_back(A->getKind()); // FIXME: stable encoding, target attrs
4348 Record.AddSourceRange(A->getRange());
4350 #include "clang/Serialization/AttrPCHWrite.inc"
4355 void ASTWriter::AddToken(const Token &Tok, RecordDataImpl &Record) {
4356 AddSourceLocation(Tok.getLocation(), Record);
4357 Record.push_back(Tok.getLength());
4359 // FIXME: When reading literal tokens, reconstruct the literal pointer
4361 AddIdentifierRef(Tok.getIdentifierInfo(), Record);
4362 // FIXME: Should translate token kind to a stable encoding.
4363 Record.push_back(Tok.getKind());
4364 // FIXME: Should translate token flags to a stable encoding.
4365 Record.push_back(Tok.getFlags());
4368 void ASTWriter::AddString(StringRef Str, RecordDataImpl &Record) {
4369 Record.push_back(Str.size());
4370 Record.insert(Record.end(), Str.begin(), Str.end());
4373 bool ASTWriter::PreparePathForOutput(SmallVectorImpl<char> &Path) {
4374 assert(Context && "should have context when outputting path");
4377 cleanPathForOutput(Context->getSourceManager().getFileManager(), Path);
4379 // Remove a prefix to make the path relative, if relevant.
4380 const char *PathBegin = Path.data();
4381 const char *PathPtr =
4382 adjustFilenameForRelocatableAST(PathBegin, BaseDirectory);
4383 if (PathPtr != PathBegin) {
4384 Path.erase(Path.begin(), Path.begin() + (PathPtr - PathBegin));
4391 void ASTWriter::AddPath(StringRef Path, RecordDataImpl &Record) {
4392 SmallString<128> FilePath(Path);
4393 PreparePathForOutput(FilePath);
4394 AddString(FilePath, Record);
4397 void ASTWriter::EmitRecordWithPath(unsigned Abbrev, RecordDataRef Record,
4399 SmallString<128> FilePath(Path);
4400 PreparePathForOutput(FilePath);
4401 Stream.EmitRecordWithBlob(Abbrev, Record, FilePath);
4404 void ASTWriter::AddVersionTuple(const VersionTuple &Version,
4405 RecordDataImpl &Record) {
4406 Record.push_back(Version.getMajor());
4407 if (Optional<unsigned> Minor = Version.getMinor())
4408 Record.push_back(*Minor + 1);
4410 Record.push_back(0);
4411 if (Optional<unsigned> Subminor = Version.getSubminor())
4412 Record.push_back(*Subminor + 1);
4414 Record.push_back(0);
4417 /// \brief Note that the identifier II occurs at the given offset
4418 /// within the identifier table.
4419 void ASTWriter::SetIdentifierOffset(const IdentifierInfo *II, uint32_t Offset) {
4420 IdentID ID = IdentifierIDs[II];
4421 // Only store offsets new to this AST file. Other identifier names are looked
4422 // up earlier in the chain and thus don't need an offset.
4423 if (ID >= FirstIdentID)
4424 IdentifierOffsets[ID - FirstIdentID] = Offset;
4427 /// \brief Note that the selector Sel occurs at the given offset
4428 /// within the method pool/selector table.
4429 void ASTWriter::SetSelectorOffset(Selector Sel, uint32_t Offset) {
4430 unsigned ID = SelectorIDs[Sel];
4431 assert(ID && "Unknown selector");
4432 // Don't record offsets for selectors that are also available in a different
4434 if (ID < FirstSelectorID)
4436 SelectorOffsets[ID - FirstSelectorID] = Offset;
4439 ASTWriter::ASTWriter(llvm::BitstreamWriter &Stream,
4440 SmallVectorImpl<char> &Buffer, MemoryBufferCache &PCMCache,
4441 ArrayRef<std::shared_ptr<ModuleFileExtension>> Extensions,
4442 bool IncludeTimestamps)
4443 : Stream(Stream), Buffer(Buffer), PCMCache(PCMCache),
4444 IncludeTimestamps(IncludeTimestamps) {
4445 for (const auto &Ext : Extensions) {
4446 if (auto Writer = Ext->createExtensionWriter(*this))
4447 ModuleFileExtensionWriters.push_back(std::move(Writer));
4451 ASTWriter::~ASTWriter() {
4452 llvm::DeleteContainerSeconds(FileDeclIDs);
4455 const LangOptions &ASTWriter::getLangOpts() const {
4456 assert(WritingAST && "can't determine lang opts when not writing AST");
4457 return Context->getLangOpts();
4460 time_t ASTWriter::getTimestampForOutput(const FileEntry *E) const {
4461 return IncludeTimestamps ? E->getModificationTime() : 0;
4464 ASTFileSignature ASTWriter::WriteAST(Sema &SemaRef,
4465 const std::string &OutputFile,
4466 Module *WritingModule, StringRef isysroot,
4470 ASTHasCompilerErrors = hasErrors;
4472 // Emit the file header.
4473 Stream.Emit((unsigned)'C', 8);
4474 Stream.Emit((unsigned)'P', 8);
4475 Stream.Emit((unsigned)'C', 8);
4476 Stream.Emit((unsigned)'H', 8);
4478 WriteBlockInfoBlock();
4480 Context = &SemaRef.Context;
4482 this->WritingModule = WritingModule;
4483 ASTFileSignature Signature =
4484 WriteASTCore(SemaRef, isysroot, OutputFile, WritingModule);
4487 this->WritingModule = nullptr;
4488 this->BaseDirectory.clear();
4491 if (SemaRef.Context.getLangOpts().ImplicitModules && WritingModule) {
4492 // Construct MemoryBuffer and update buffer manager.
4493 PCMCache.addBuffer(OutputFile,
4494 llvm::MemoryBuffer::getMemBufferCopy(
4495 StringRef(Buffer.begin(), Buffer.size())));
4500 template<typename Vector>
4501 static void AddLazyVectorDecls(ASTWriter &Writer, Vector &Vec,
4502 ASTWriter::RecordData &Record) {
4503 for (typename Vector::iterator I = Vec.begin(nullptr, true), E = Vec.end();
4505 Writer.AddDeclRef(*I, Record);
4509 ASTFileSignature ASTWriter::WriteASTCore(Sema &SemaRef, StringRef isysroot,
4510 const std::string &OutputFile,
4511 Module *WritingModule) {
4512 using namespace llvm;
4514 bool isModule = WritingModule != nullptr;
4516 // Make sure that the AST reader knows to finalize itself.
4518 Chain->finalizeForWriting();
4520 ASTContext &Context = SemaRef.Context;
4521 Preprocessor &PP = SemaRef.PP;
4523 // Set up predefined declaration IDs.
4524 auto RegisterPredefDecl = [&] (Decl *D, PredefinedDeclIDs ID) {
4526 assert(D->isCanonicalDecl() && "predefined decl is not canonical");
4530 RegisterPredefDecl(Context.getTranslationUnitDecl(),
4531 PREDEF_DECL_TRANSLATION_UNIT_ID);
4532 RegisterPredefDecl(Context.ObjCIdDecl, PREDEF_DECL_OBJC_ID_ID);
4533 RegisterPredefDecl(Context.ObjCSelDecl, PREDEF_DECL_OBJC_SEL_ID);
4534 RegisterPredefDecl(Context.ObjCClassDecl, PREDEF_DECL_OBJC_CLASS_ID);
4535 RegisterPredefDecl(Context.ObjCProtocolClassDecl,
4536 PREDEF_DECL_OBJC_PROTOCOL_ID);
4537 RegisterPredefDecl(Context.Int128Decl, PREDEF_DECL_INT_128_ID);
4538 RegisterPredefDecl(Context.UInt128Decl, PREDEF_DECL_UNSIGNED_INT_128_ID);
4539 RegisterPredefDecl(Context.ObjCInstanceTypeDecl,
4540 PREDEF_DECL_OBJC_INSTANCETYPE_ID);
4541 RegisterPredefDecl(Context.BuiltinVaListDecl, PREDEF_DECL_BUILTIN_VA_LIST_ID);
4542 RegisterPredefDecl(Context.VaListTagDecl, PREDEF_DECL_VA_LIST_TAG);
4543 RegisterPredefDecl(Context.BuiltinMSVaListDecl,
4544 PREDEF_DECL_BUILTIN_MS_VA_LIST_ID);
4545 RegisterPredefDecl(Context.ExternCContext, PREDEF_DECL_EXTERN_C_CONTEXT_ID);
4546 RegisterPredefDecl(Context.MakeIntegerSeqDecl,
4547 PREDEF_DECL_MAKE_INTEGER_SEQ_ID);
4548 RegisterPredefDecl(Context.CFConstantStringTypeDecl,
4549 PREDEF_DECL_CF_CONSTANT_STRING_ID);
4550 RegisterPredefDecl(Context.CFConstantStringTagDecl,
4551 PREDEF_DECL_CF_CONSTANT_STRING_TAG_ID);
4552 RegisterPredefDecl(Context.TypePackElementDecl,
4553 PREDEF_DECL_TYPE_PACK_ELEMENT_ID);
4555 // Build a record containing all of the tentative definitions in this file, in
4556 // TentativeDefinitions order. Generally, this record will be empty for
4558 RecordData TentativeDefinitions;
4559 AddLazyVectorDecls(*this, SemaRef.TentativeDefinitions, TentativeDefinitions);
4561 // Build a record containing all of the file scoped decls in this file.
4562 RecordData UnusedFileScopedDecls;
4564 AddLazyVectorDecls(*this, SemaRef.UnusedFileScopedDecls,
4565 UnusedFileScopedDecls);
4567 // Build a record containing all of the delegating constructors we still need
4569 RecordData DelegatingCtorDecls;
4571 AddLazyVectorDecls(*this, SemaRef.DelegatingCtorDecls, DelegatingCtorDecls);
4573 // Write the set of weak, undeclared identifiers. We always write the
4574 // entire table, since later PCH files in a PCH chain are only interested in
4575 // the results at the end of the chain.
4576 RecordData WeakUndeclaredIdentifiers;
4577 for (auto &WeakUndeclaredIdentifier : SemaRef.WeakUndeclaredIdentifiers) {
4578 IdentifierInfo *II = WeakUndeclaredIdentifier.first;
4579 WeakInfo &WI = WeakUndeclaredIdentifier.second;
4580 AddIdentifierRef(II, WeakUndeclaredIdentifiers);
4581 AddIdentifierRef(WI.getAlias(), WeakUndeclaredIdentifiers);
4582 AddSourceLocation(WI.getLocation(), WeakUndeclaredIdentifiers);
4583 WeakUndeclaredIdentifiers.push_back(WI.getUsed());
4586 // Build a record containing all of the ext_vector declarations.
4587 RecordData ExtVectorDecls;
4588 AddLazyVectorDecls(*this, SemaRef.ExtVectorDecls, ExtVectorDecls);
4590 // Build a record containing all of the VTable uses information.
4591 RecordData VTableUses;
4592 if (!SemaRef.VTableUses.empty()) {
4593 for (unsigned I = 0, N = SemaRef.VTableUses.size(); I != N; ++I) {
4594 AddDeclRef(SemaRef.VTableUses[I].first, VTableUses);
4595 AddSourceLocation(SemaRef.VTableUses[I].second, VTableUses);
4596 VTableUses.push_back(SemaRef.VTablesUsed[SemaRef.VTableUses[I].first]);
4600 // Build a record containing all of the UnusedLocalTypedefNameCandidates.
4601 RecordData UnusedLocalTypedefNameCandidates;
4602 for (const TypedefNameDecl *TD : SemaRef.UnusedLocalTypedefNameCandidates)
4603 AddDeclRef(TD, UnusedLocalTypedefNameCandidates);
4605 // Build a record containing all of pending implicit instantiations.
4606 RecordData PendingInstantiations;
4607 for (const auto &I : SemaRef.PendingInstantiations) {
4608 AddDeclRef(I.first, PendingInstantiations);
4609 AddSourceLocation(I.second, PendingInstantiations);
4611 assert(SemaRef.PendingLocalImplicitInstantiations.empty() &&
4612 "There are local ones at end of translation unit!");
4614 // Build a record containing some declaration references.
4615 RecordData SemaDeclRefs;
4616 if (SemaRef.StdNamespace || SemaRef.StdBadAlloc || SemaRef.StdAlignValT) {
4617 AddDeclRef(SemaRef.getStdNamespace(), SemaDeclRefs);
4618 AddDeclRef(SemaRef.getStdBadAlloc(), SemaDeclRefs);
4619 AddDeclRef(SemaRef.getStdAlignValT(), SemaDeclRefs);
4622 RecordData CUDASpecialDeclRefs;
4623 if (Context.getcudaConfigureCallDecl()) {
4624 AddDeclRef(Context.getcudaConfigureCallDecl(), CUDASpecialDeclRefs);
4627 // Build a record containing all of the known namespaces.
4628 RecordData KnownNamespaces;
4629 for (const auto &I : SemaRef.KnownNamespaces) {
4631 AddDeclRef(I.first, KnownNamespaces);
4634 // Build a record of all used, undefined objects that require definitions.
4635 RecordData UndefinedButUsed;
4637 SmallVector<std::pair<NamedDecl *, SourceLocation>, 16> Undefined;
4638 SemaRef.getUndefinedButUsed(Undefined);
4639 for (const auto &I : Undefined) {
4640 AddDeclRef(I.first, UndefinedButUsed);
4641 AddSourceLocation(I.second, UndefinedButUsed);
4644 // Build a record containing all delete-expressions that we would like to
4645 // analyze later in AST.
4646 RecordData DeleteExprsToAnalyze;
4648 for (const auto &DeleteExprsInfo :
4649 SemaRef.getMismatchingDeleteExpressions()) {
4650 AddDeclRef(DeleteExprsInfo.first, DeleteExprsToAnalyze);
4651 DeleteExprsToAnalyze.push_back(DeleteExprsInfo.second.size());
4652 for (const auto &DeleteLoc : DeleteExprsInfo.second) {
4653 AddSourceLocation(DeleteLoc.first, DeleteExprsToAnalyze);
4654 DeleteExprsToAnalyze.push_back(DeleteLoc.second);
4658 // Write the control block
4659 WriteControlBlock(PP, Context, isysroot, OutputFile);
4661 // Write the remaining AST contents.
4662 Stream.EnterSubblock(AST_BLOCK_ID, 5);
4664 // This is so that older clang versions, before the introduction
4665 // of the control block, can read and reject the newer PCH format.
4667 RecordData Record = {VERSION_MAJOR};
4668 Stream.EmitRecord(METADATA_OLD_FORMAT, Record);
4671 // Create a lexical update block containing all of the declarations in the
4672 // translation unit that do not come from other AST files.
4673 const TranslationUnitDecl *TU = Context.getTranslationUnitDecl();
4674 SmallVector<uint32_t, 128> NewGlobalKindDeclPairs;
4675 for (const auto *D : TU->noload_decls()) {
4676 if (!D->isFromASTFile()) {
4677 NewGlobalKindDeclPairs.push_back(D->getKind());
4678 NewGlobalKindDeclPairs.push_back(GetDeclRef(D));
4682 auto Abv = std::make_shared<BitCodeAbbrev>();
4683 Abv->Add(llvm::BitCodeAbbrevOp(TU_UPDATE_LEXICAL));
4684 Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::Blob));
4685 unsigned TuUpdateLexicalAbbrev = Stream.EmitAbbrev(std::move(Abv));
4687 RecordData::value_type Record[] = {TU_UPDATE_LEXICAL};
4688 Stream.EmitRecordWithBlob(TuUpdateLexicalAbbrev, Record,
4689 bytes(NewGlobalKindDeclPairs));
4692 // And a visible updates block for the translation unit.
4693 Abv = std::make_shared<BitCodeAbbrev>();
4694 Abv->Add(llvm::BitCodeAbbrevOp(UPDATE_VISIBLE));
4695 Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::VBR, 6));
4696 Abv->Add(llvm::BitCodeAbbrevOp(llvm::BitCodeAbbrevOp::Blob));
4697 UpdateVisibleAbbrev = Stream.EmitAbbrev(std::move(Abv));
4698 WriteDeclContextVisibleUpdate(TU);
4700 // If we have any extern "C" names, write out a visible update for them.
4701 if (Context.ExternCContext)
4702 WriteDeclContextVisibleUpdate(Context.ExternCContext);
4704 // If the translation unit has an anonymous namespace, and we don't already
4705 // have an update block for it, write it as an update block.
4706 // FIXME: Why do we not do this if there's already an update block?
4707 if (NamespaceDecl *NS = TU->getAnonymousNamespace()) {
4708 ASTWriter::UpdateRecord &Record = DeclUpdates[TU];
4710 Record.push_back(DeclUpdate(UPD_CXX_ADDED_ANONYMOUS_NAMESPACE, NS));
4713 // Add update records for all mangling numbers and static local numbers.
4714 // These aren't really update records, but this is a convenient way of
4715 // tagging this rare extra data onto the declarations.
4716 for (const auto &Number : Context.MangleNumbers)
4717 if (!Number.first->isFromASTFile())
4718 DeclUpdates[Number.first].push_back(DeclUpdate(UPD_MANGLING_NUMBER,
4720 for (const auto &Number : Context.StaticLocalNumbers)
4721 if (!Number.first->isFromASTFile())
4722 DeclUpdates[Number.first].push_back(DeclUpdate(UPD_STATIC_LOCAL_NUMBER,
4725 // Make sure visible decls, added to DeclContexts previously loaded from
4726 // an AST file, are registered for serialization. Likewise for template
4727 // specializations added to imported templates.
4728 for (const auto *I : DeclsToEmitEvenIfUnreferenced) {
4732 // Make sure all decls associated with an identifier are registered for
4733 // serialization, if we're storing decls with identifiers.
4734 if (!WritingModule || !getLangOpts().CPlusPlus) {
4735 llvm::SmallVector<const IdentifierInfo*, 256> IIs;
4736 for (const auto &ID : PP.getIdentifierTable()) {
4737 const IdentifierInfo *II = ID.second;
4738 if (!Chain || !II->isFromAST() || II->hasChangedSinceDeserialization())
4741 // Sort the identifiers to visit based on their name.
4742 std::sort(IIs.begin(), IIs.end(), llvm::less_ptr<IdentifierInfo>());
4743 for (const IdentifierInfo *II : IIs) {
4744 for (IdentifierResolver::iterator D = SemaRef.IdResolver.begin(II),
4745 DEnd = SemaRef.IdResolver.end();
4752 // For method pool in the module, if it contains an entry for a selector,
4753 // the entry should be complete, containing everything introduced by that
4754 // module and all modules it imports. It's possible that the entry is out of
4755 // date, so we need to pull in the new content here.
4757 // It's possible that updateOutOfDateSelector can update SelectorIDs. To be
4758 // safe, we copy all selectors out.
4759 llvm::SmallVector<Selector, 256> AllSelectors;
4760 for (auto &SelectorAndID : SelectorIDs)
4761 AllSelectors.push_back(SelectorAndID.first);
4762 for (auto &Selector : AllSelectors)
4763 SemaRef.updateOutOfDateSelector(Selector);
4765 // Form the record of special types.
4766 RecordData SpecialTypes;
4767 AddTypeRef(Context.getRawCFConstantStringType(), SpecialTypes);
4768 AddTypeRef(Context.getFILEType(), SpecialTypes);
4769 AddTypeRef(Context.getjmp_bufType(), SpecialTypes);
4770 AddTypeRef(Context.getsigjmp_bufType(), SpecialTypes);
4771 AddTypeRef(Context.ObjCIdRedefinitionType, SpecialTypes);
4772 AddTypeRef(Context.ObjCClassRedefinitionType, SpecialTypes);
4773 AddTypeRef(Context.ObjCSelRedefinitionType, SpecialTypes);
4774 AddTypeRef(Context.getucontext_tType(), SpecialTypes);
4777 // Write the mapping information describing our module dependencies and how
4778 // each of those modules were mapped into our own offset/ID space, so that
4779 // the reader can build the appropriate mapping to its own offset/ID space.
4780 // The map consists solely of a blob with the following format:
4781 // *(module-name-len:i16 module-name:len*i8
4782 // source-location-offset:i32
4783 // identifier-id:i32
4784 // preprocessed-entity-id:i32
4785 // macro-definition-id:i32
4788 // declaration-id:i32
4789 // c++-base-specifiers-id:i32
4792 auto Abbrev = std::make_shared<BitCodeAbbrev>();
4793 Abbrev->Add(BitCodeAbbrevOp(MODULE_OFFSET_MAP));
4794 Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
4795 unsigned ModuleOffsetMapAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
4796 SmallString<2048> Buffer;
4798 llvm::raw_svector_ostream Out(Buffer);
4799 for (ModuleFile &M : Chain->ModuleMgr) {
4800 using namespace llvm::support;
4801 endian::Writer<little> LE(Out);
4802 StringRef FileName = M.FileName;
4803 LE.write<uint16_t>(FileName.size());
4804 Out.write(FileName.data(), FileName.size());
4806 // Note: if a base ID was uint max, it would not be possible to load
4807 // another module after it or have more than one entity inside it.
4808 uint32_t None = std::numeric_limits<uint32_t>::max();
4810 auto writeBaseIDOrNone = [&](uint32_t BaseID, bool ShouldWrite) {
4811 assert(BaseID < std::numeric_limits<uint32_t>::max() && "base id too high");
4813 LE.write<uint32_t>(BaseID);
4815 LE.write<uint32_t>(None);
4818 // These values should be unique within a chain, since they will be read
4819 // as keys into ContinuousRangeMaps.
4820 writeBaseIDOrNone(M.SLocEntryBaseOffset, M.LocalNumSLocEntries);
4821 writeBaseIDOrNone(M.BaseIdentifierID, M.LocalNumIdentifiers);
4822 writeBaseIDOrNone(M.BaseMacroID, M.LocalNumMacros);
4823 writeBaseIDOrNone(M.BasePreprocessedEntityID,
4824 M.NumPreprocessedEntities);
4825 writeBaseIDOrNone(M.BaseSubmoduleID, M.LocalNumSubmodules);
4826 writeBaseIDOrNone(M.BaseSelectorID, M.LocalNumSelectors);
4827 writeBaseIDOrNone(M.BaseDeclID, M.LocalNumDecls);
4828 writeBaseIDOrNone(M.BaseTypeIndex, M.LocalNumTypes);
4831 RecordData::value_type Record[] = {MODULE_OFFSET_MAP};
4832 Stream.EmitRecordWithBlob(ModuleOffsetMapAbbrev, Record,
4833 Buffer.data(), Buffer.size());
4836 RecordData DeclUpdatesOffsetsRecord;
4838 // Keep writing types, declarations, and declaration update records
4839 // until we've emitted all of them.
4840 Stream.EnterSubblock(DECLTYPES_BLOCK_ID, /*bits for abbreviations*/5);
4844 WriteDeclUpdatesBlocks(DeclUpdatesOffsetsRecord);
4845 while (!DeclTypesToEmit.empty()) {
4846 DeclOrType DOT = DeclTypesToEmit.front();
4847 DeclTypesToEmit.pop();
4849 WriteType(DOT.getType());
4851 WriteDecl(Context, DOT.getDecl());
4853 } while (!DeclUpdates.empty());
4856 DoneWritingDeclsAndTypes = true;
4858 // These things can only be done once we've written out decls and types.
4859 WriteTypeDeclOffsets();
4860 if (!DeclUpdatesOffsetsRecord.empty())
4861 Stream.EmitRecord(DECL_UPDATE_OFFSETS, DeclUpdatesOffsetsRecord);
4862 WriteFileDeclIDsMap();
4863 WriteSourceManagerBlock(Context.getSourceManager(), PP);
4865 WritePreprocessor(PP, isModule);
4866 WriteHeaderSearch(PP.getHeaderSearchInfo());
4867 WriteSelectors(SemaRef);
4868 WriteReferencedSelectorsPool(SemaRef);
4869 WriteLateParsedTemplates(SemaRef);
4870 WriteIdentifierTable(PP, SemaRef.IdResolver, isModule);
4871 WriteFPPragmaOptions(SemaRef.getFPOptions());
4872 WriteOpenCLExtensions(SemaRef);
4873 WriteOpenCLExtensionTypes(SemaRef);
4874 WriteOpenCLExtensionDecls(SemaRef);
4875 WriteCUDAPragmas(SemaRef);
4877 // If we're emitting a module, write out the submodule information.
4879 WriteSubmodules(WritingModule);
4881 Stream.EmitRecord(SPECIAL_TYPES, SpecialTypes);
4883 // Write the record containing external, unnamed definitions.
4884 if (!EagerlyDeserializedDecls.empty())
4885 Stream.EmitRecord(EAGERLY_DESERIALIZED_DECLS, EagerlyDeserializedDecls);
4887 if (!ModularCodegenDecls.empty())
4888 Stream.EmitRecord(MODULAR_CODEGEN_DECLS, ModularCodegenDecls);
4890 // Write the record containing tentative definitions.
4891 if (!TentativeDefinitions.empty())
4892 Stream.EmitRecord(TENTATIVE_DEFINITIONS, TentativeDefinitions);
4894 // Write the record containing unused file scoped decls.
4895 if (!UnusedFileScopedDecls.empty())
4896 Stream.EmitRecord(UNUSED_FILESCOPED_DECLS, UnusedFileScopedDecls);
4898 // Write the record containing weak undeclared identifiers.
4899 if (!WeakUndeclaredIdentifiers.empty())
4900 Stream.EmitRecord(WEAK_UNDECLARED_IDENTIFIERS,
4901 WeakUndeclaredIdentifiers);
4903 // Write the record containing ext_vector type names.
4904 if (!ExtVectorDecls.empty())
4905 Stream.EmitRecord(EXT_VECTOR_DECLS, ExtVectorDecls);
4907 // Write the record containing VTable uses information.
4908 if (!VTableUses.empty())
4909 Stream.EmitRecord(VTABLE_USES, VTableUses);
4911 // Write the record containing potentially unused local typedefs.
4912 if (!UnusedLocalTypedefNameCandidates.empty())
4913 Stream.EmitRecord(UNUSED_LOCAL_TYPEDEF_NAME_CANDIDATES,
4914 UnusedLocalTypedefNameCandidates);
4916 // Write the record containing pending implicit instantiations.
4917 if (!PendingInstantiations.empty())
4918 Stream.EmitRecord(PENDING_IMPLICIT_INSTANTIATIONS, PendingInstantiations);
4920 // Write the record containing declaration references of Sema.
4921 if (!SemaDeclRefs.empty())
4922 Stream.EmitRecord(SEMA_DECL_REFS, SemaDeclRefs);
4924 // Write the record containing CUDA-specific declaration references.
4925 if (!CUDASpecialDeclRefs.empty())
4926 Stream.EmitRecord(CUDA_SPECIAL_DECL_REFS, CUDASpecialDeclRefs);
4928 // Write the delegating constructors.
4929 if (!DelegatingCtorDecls.empty())
4930 Stream.EmitRecord(DELEGATING_CTORS, DelegatingCtorDecls);
4932 // Write the known namespaces.
4933 if (!KnownNamespaces.empty())
4934 Stream.EmitRecord(KNOWN_NAMESPACES, KnownNamespaces);
4936 // Write the undefined internal functions and variables, and inline functions.
4937 if (!UndefinedButUsed.empty())
4938 Stream.EmitRecord(UNDEFINED_BUT_USED, UndefinedButUsed);
4940 if (!DeleteExprsToAnalyze.empty())
4941 Stream.EmitRecord(DELETE_EXPRS_TO_ANALYZE, DeleteExprsToAnalyze);
4943 // Write the visible updates to DeclContexts.
4944 for (auto *DC : UpdatedDeclContexts)
4945 WriteDeclContextVisibleUpdate(DC);
4947 if (!WritingModule) {
4948 // Write the submodules that were imported, if any.
4952 ModuleInfo(uint64_t ID, Module *M) : ID(ID), M(M) {}
4954 llvm::SmallVector<ModuleInfo, 64> Imports;
4955 for (const auto *I : Context.local_imports()) {
4956 assert(SubmoduleIDs.find(I->getImportedModule()) != SubmoduleIDs.end());
4957 Imports.push_back(ModuleInfo(SubmoduleIDs[I->getImportedModule()],
4958 I->getImportedModule()));
4961 if (!Imports.empty()) {
4962 auto Cmp = [](const ModuleInfo &A, const ModuleInfo &B) {
4965 auto Eq = [](const ModuleInfo &A, const ModuleInfo &B) {
4966 return A.ID == B.ID;
4969 // Sort and deduplicate module IDs.
4970 std::sort(Imports.begin(), Imports.end(), Cmp);
4971 Imports.erase(std::unique(Imports.begin(), Imports.end(), Eq),
4974 RecordData ImportedModules;
4975 for (const auto &Import : Imports) {
4976 ImportedModules.push_back(Import.ID);
4977 // FIXME: If the module has macros imported then later has declarations
4978 // imported, this location won't be the right one as a location for the
4979 // declaration imports.
4980 AddSourceLocation(PP.getModuleImportLoc(Import.M), ImportedModules);
4983 Stream.EmitRecord(IMPORTED_MODULES, ImportedModules);
4987 WriteObjCCategories();
4988 if(!WritingModule) {
4989 WriteOptimizePragmaOptions(SemaRef);
4990 WriteMSStructPragmaOptions(SemaRef);
4991 WriteMSPointersToMembersPragmaOptions(SemaRef);
4993 WritePackPragmaOptions(SemaRef);
4995 // Some simple statistics
4996 RecordData::value_type Record[] = {
4997 NumStatements, NumMacros, NumLexicalDeclContexts, NumVisibleDeclContexts};
4998 Stream.EmitRecord(STATISTICS, Record);
5001 // Write the module file extension blocks.
5002 for (const auto &ExtWriter : ModuleFileExtensionWriters)
5003 WriteModuleFileExtension(SemaRef, *ExtWriter);
5005 return writeUnhashedControlBlock(PP, Context);
5008 void ASTWriter::WriteDeclUpdatesBlocks(RecordDataImpl &OffsetsRecord) {
5009 if (DeclUpdates.empty())
5012 DeclUpdateMap LocalUpdates;
5013 LocalUpdates.swap(DeclUpdates);
5015 for (auto &DeclUpdate : LocalUpdates) {
5016 const Decl *D = DeclUpdate.first;
5018 bool HasUpdatedBody = false;
5019 RecordData RecordData;
5020 ASTRecordWriter Record(*this, RecordData);
5021 for (auto &Update : DeclUpdate.second) {
5022 DeclUpdateKind Kind = (DeclUpdateKind)Update.getKind();
5024 // An updated body is emitted last, so that the reader doesn't need
5025 // to skip over the lazy body to reach statements for other records.
5026 if (Kind == UPD_CXX_ADDED_FUNCTION_DEFINITION)
5027 HasUpdatedBody = true;
5029 Record.push_back(Kind);
5032 case UPD_CXX_ADDED_IMPLICIT_MEMBER:
5033 case UPD_CXX_ADDED_TEMPLATE_SPECIALIZATION:
5034 case UPD_CXX_ADDED_ANONYMOUS_NAMESPACE:
5035 assert(Update.getDecl() && "no decl to add?");
5036 Record.push_back(GetDeclRef(Update.getDecl()));
5039 case UPD_CXX_ADDED_FUNCTION_DEFINITION:
5042 case UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER: {
5043 const VarDecl *VD = cast<VarDecl>(D);
5044 Record.AddSourceLocation(Update.getLoc());
5045 if (VD->getInit()) {
5046 Record.push_back(!VD->isInitKnownICE() ? 1
5047 : (VD->isInitICE() ? 3 : 2));
5048 Record.AddStmt(const_cast<Expr*>(VD->getInit()));
5050 Record.push_back(0);
5055 case UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT:
5056 Record.AddStmt(const_cast<Expr *>(
5057 cast<ParmVarDecl>(Update.getDecl())->getDefaultArg()));
5060 case UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER:
5062 cast<FieldDecl>(Update.getDecl())->getInClassInitializer());
5065 case UPD_CXX_INSTANTIATED_CLASS_DEFINITION: {
5066 auto *RD = cast<CXXRecordDecl>(D);
5067 UpdatedDeclContexts.insert(RD->getPrimaryContext());
5068 Record.AddCXXDefinitionData(RD);
5069 Record.AddOffset(WriteDeclContextLexicalBlock(
5070 *Context, const_cast<CXXRecordDecl *>(RD)));
5072 // This state is sometimes updated by template instantiation, when we
5073 // switch from the specialization referring to the template declaration
5074 // to it referring to the template definition.
5075 if (auto *MSInfo = RD->getMemberSpecializationInfo()) {
5076 Record.push_back(MSInfo->getTemplateSpecializationKind());
5077 Record.AddSourceLocation(MSInfo->getPointOfInstantiation());
5079 auto *Spec = cast<ClassTemplateSpecializationDecl>(RD);
5080 Record.push_back(Spec->getTemplateSpecializationKind());
5081 Record.AddSourceLocation(Spec->getPointOfInstantiation());
5083 // The instantiation might have been resolved to a partial
5084 // specialization. If so, record which one.
5085 auto From = Spec->getInstantiatedFrom();
5086 if (auto PartialSpec =
5087 From.dyn_cast<ClassTemplatePartialSpecializationDecl*>()) {
5088 Record.push_back(true);
5089 Record.AddDeclRef(PartialSpec);
5090 Record.AddTemplateArgumentList(
5091 &Spec->getTemplateInstantiationArgs());
5093 Record.push_back(false);
5096 Record.push_back(RD->getTagKind());
5097 Record.AddSourceLocation(RD->getLocation());
5098 Record.AddSourceLocation(RD->getLocStart());
5099 Record.AddSourceRange(RD->getBraceRange());
5101 // Instantiation may change attributes; write them all out afresh.
5102 Record.push_back(D->hasAttrs());
5104 Record.AddAttributes(D->getAttrs());
5106 // FIXME: Ensure we don't get here for explicit instantiations.
5110 case UPD_CXX_RESOLVED_DTOR_DELETE:
5111 Record.AddDeclRef(Update.getDecl());
5114 case UPD_CXX_RESOLVED_EXCEPTION_SPEC:
5116 cast<FunctionDecl>(D)->getType()->castAs<FunctionProtoType>(),
5120 case UPD_CXX_DEDUCED_RETURN_TYPE:
5121 Record.push_back(GetOrCreateTypeID(Update.getType()));
5124 case UPD_DECL_MARKED_USED:
5127 case UPD_MANGLING_NUMBER:
5128 case UPD_STATIC_LOCAL_NUMBER:
5129 Record.push_back(Update.getNumber());
5132 case UPD_DECL_MARKED_OPENMP_THREADPRIVATE:
5133 Record.AddSourceRange(
5134 D->getAttr<OMPThreadPrivateDeclAttr>()->getRange());
5137 case UPD_DECL_MARKED_OPENMP_DECLARETARGET:
5138 Record.AddSourceRange(
5139 D->getAttr<OMPDeclareTargetDeclAttr>()->getRange());
5142 case UPD_DECL_EXPORTED:
5143 Record.push_back(getSubmoduleID(Update.getModule()));
5146 case UPD_ADDED_ATTR_TO_RECORD:
5147 Record.AddAttributes(llvm::makeArrayRef(Update.getAttr()));
5152 if (HasUpdatedBody) {
5153 const auto *Def = cast<FunctionDecl>(D);
5154 Record.push_back(UPD_CXX_ADDED_FUNCTION_DEFINITION);
5155 Record.push_back(Def->isInlined());
5156 Record.AddSourceLocation(Def->getInnerLocStart());
5157 Record.AddFunctionDefinition(Def);
5160 OffsetsRecord.push_back(GetDeclRef(D));
5161 OffsetsRecord.push_back(Record.Emit(DECL_UPDATES));
5165 void ASTWriter::AddSourceLocation(SourceLocation Loc, RecordDataImpl &Record) {
5166 uint32_t Raw = Loc.getRawEncoding();
5167 Record.push_back((Raw << 1) | (Raw >> 31));
5170 void ASTWriter::AddSourceRange(SourceRange Range, RecordDataImpl &Record) {
5171 AddSourceLocation(Range.getBegin(), Record);
5172 AddSourceLocation(Range.getEnd(), Record);
5175 void ASTRecordWriter::AddAPInt(const llvm::APInt &Value) {
5176 Record->push_back(Value.getBitWidth());
5177 const uint64_t *Words = Value.getRawData();
5178 Record->append(Words, Words + Value.getNumWords());
5181 void ASTRecordWriter::AddAPSInt(const llvm::APSInt &Value) {
5182 Record->push_back(Value.isUnsigned());
5186 void ASTRecordWriter::AddAPFloat(const llvm::APFloat &Value) {
5187 AddAPInt(Value.bitcastToAPInt());
5190 void ASTWriter::AddIdentifierRef(const IdentifierInfo *II, RecordDataImpl &Record) {
5191 Record.push_back(getIdentifierRef(II));
5194 IdentID ASTWriter::getIdentifierRef(const IdentifierInfo *II) {
5198 IdentID &ID = IdentifierIDs[II];
5204 MacroID ASTWriter::getMacroRef(MacroInfo *MI, const IdentifierInfo *Name) {
5205 // Don't emit builtin macros like __LINE__ to the AST file unless they
5206 // have been redefined by the header (in which case they are not
5208 if (!MI || MI->isBuiltinMacro())
5211 MacroID &ID = MacroIDs[MI];
5214 MacroInfoToEmitData Info = { Name, MI, ID };
5215 MacroInfosToEmit.push_back(Info);
5220 MacroID ASTWriter::getMacroID(MacroInfo *MI) {
5221 if (!MI || MI->isBuiltinMacro())
5224 assert(MacroIDs.find(MI) != MacroIDs.end() && "Macro not emitted!");
5225 return MacroIDs[MI];
5228 uint64_t ASTWriter::getMacroDirectivesOffset(const IdentifierInfo *Name) {
5229 return IdentMacroDirectivesOffsetMap.lookup(Name);
5232 void ASTRecordWriter::AddSelectorRef(const Selector SelRef) {
5233 Record->push_back(Writer->getSelectorRef(SelRef));
5236 SelectorID ASTWriter::getSelectorRef(Selector Sel) {
5237 if (Sel.getAsOpaquePtr() == nullptr) {
5241 SelectorID SID = SelectorIDs[Sel];
5242 if (SID == 0 && Chain) {
5243 // This might trigger a ReadSelector callback, which will set the ID for
5245 Chain->LoadSelector(Sel);
5246 SID = SelectorIDs[Sel];
5249 SID = NextSelectorID++;
5250 SelectorIDs[Sel] = SID;
5255 void ASTRecordWriter::AddCXXTemporary(const CXXTemporary *Temp) {
5256 AddDeclRef(Temp->getDestructor());
5259 void ASTRecordWriter::AddTemplateArgumentLocInfo(
5260 TemplateArgument::ArgKind Kind, const TemplateArgumentLocInfo &Arg) {
5262 case TemplateArgument::Expression:
5263 AddStmt(Arg.getAsExpr());
5265 case TemplateArgument::Type:
5266 AddTypeSourceInfo(Arg.getAsTypeSourceInfo());
5268 case TemplateArgument::Template:
5269 AddNestedNameSpecifierLoc(Arg.getTemplateQualifierLoc());
5270 AddSourceLocation(Arg.getTemplateNameLoc());
5272 case TemplateArgument::TemplateExpansion:
5273 AddNestedNameSpecifierLoc(Arg.getTemplateQualifierLoc());
5274 AddSourceLocation(Arg.getTemplateNameLoc());
5275 AddSourceLocation(Arg.getTemplateEllipsisLoc());
5277 case TemplateArgument::Null:
5278 case TemplateArgument::Integral:
5279 case TemplateArgument::Declaration:
5280 case TemplateArgument::NullPtr:
5281 case TemplateArgument::Pack:
5282 // FIXME: Is this right?
5287 void ASTRecordWriter::AddTemplateArgumentLoc(const TemplateArgumentLoc &Arg) {
5288 AddTemplateArgument(Arg.getArgument());
5290 if (Arg.getArgument().getKind() == TemplateArgument::Expression) {
5291 bool InfoHasSameExpr
5292 = Arg.getArgument().getAsExpr() == Arg.getLocInfo().getAsExpr();
5293 Record->push_back(InfoHasSameExpr);
5294 if (InfoHasSameExpr)
5295 return; // Avoid storing the same expr twice.
5297 AddTemplateArgumentLocInfo(Arg.getArgument().getKind(), Arg.getLocInfo());
5300 void ASTRecordWriter::AddTypeSourceInfo(TypeSourceInfo *TInfo) {
5302 AddTypeRef(QualType());
5306 AddTypeLoc(TInfo->getTypeLoc());
5309 void ASTRecordWriter::AddTypeLoc(TypeLoc TL) {
5310 AddTypeRef(TL.getType());
5312 TypeLocWriter TLW(*this);
5313 for (; !TL.isNull(); TL = TL.getNextTypeLoc())
5317 void ASTWriter::AddTypeRef(QualType T, RecordDataImpl &Record) {
5318 Record.push_back(GetOrCreateTypeID(T));
5321 TypeID ASTWriter::GetOrCreateTypeID(QualType T) {
5323 return MakeTypeID(*Context, T, [&](QualType T) -> TypeIdx {
5326 assert(!T.getLocalFastQualifiers());
5328 TypeIdx &Idx = TypeIdxs[T];
5329 if (Idx.getIndex() == 0) {
5330 if (DoneWritingDeclsAndTypes) {
5331 assert(0 && "New type seen after serializing all the types to emit!");
5335 // We haven't seen this type before. Assign it a new ID and put it
5336 // into the queue of types to emit.
5337 Idx = TypeIdx(NextTypeID++);
5338 DeclTypesToEmit.push(T);
5344 TypeID ASTWriter::getTypeID(QualType T) const {
5346 return MakeTypeID(*Context, T, [&](QualType T) -> TypeIdx {
5349 assert(!T.getLocalFastQualifiers());
5351 TypeIdxMap::const_iterator I = TypeIdxs.find(T);
5352 assert(I != TypeIdxs.end() && "Type not emitted!");
5357 void ASTWriter::AddDeclRef(const Decl *D, RecordDataImpl &Record) {
5358 Record.push_back(GetDeclRef(D));
5361 DeclID ASTWriter::GetDeclRef(const Decl *D) {
5362 assert(WritingAST && "Cannot request a declaration ID before AST writing");
5368 // If D comes from an AST file, its declaration ID is already known and
5370 if (D->isFromASTFile())
5371 return D->getGlobalID();
5373 assert(!(reinterpret_cast<uintptr_t>(D) & 0x01) && "Invalid decl pointer");
5374 DeclID &ID = DeclIDs[D];
5376 if (DoneWritingDeclsAndTypes) {
5377 assert(0 && "New decl seen after serializing all the decls to emit!");
5381 // We haven't seen this declaration before. Give it a new ID and
5382 // enqueue it in the list of declarations to emit.
5384 DeclTypesToEmit.push(const_cast<Decl *>(D));
5390 DeclID ASTWriter::getDeclID(const Decl *D) {
5394 // If D comes from an AST file, its declaration ID is already known and
5396 if (D->isFromASTFile())
5397 return D->getGlobalID();
5399 assert(DeclIDs.find(D) != DeclIDs.end() && "Declaration not emitted!");
5403 void ASTWriter::associateDeclWithFile(const Decl *D, DeclID ID) {
5407 SourceLocation Loc = D->getLocation();
5408 if (Loc.isInvalid())
5411 // We only keep track of the file-level declarations of each file.
5412 if (!D->getLexicalDeclContext()->isFileContext())
5414 // FIXME: ParmVarDecls that are part of a function type of a parameter of
5415 // a function/objc method, should not have TU as lexical context.
5416 if (isa<ParmVarDecl>(D))
5419 SourceManager &SM = Context->getSourceManager();
5420 SourceLocation FileLoc = SM.getFileLoc(Loc);
5421 assert(SM.isLocalSourceLocation(FileLoc));
5424 std::tie(FID, Offset) = SM.getDecomposedLoc(FileLoc);
5425 if (FID.isInvalid())
5427 assert(SM.getSLocEntry(FID).isFile());
5429 DeclIDInFileInfo *&Info = FileDeclIDs[FID];
5431 Info = new DeclIDInFileInfo();
5433 std::pair<unsigned, serialization::DeclID> LocDecl(Offset, ID);
5434 LocDeclIDsTy &Decls = Info->DeclIDs;
5436 if (Decls.empty() || Decls.back().first <= Offset) {
5437 Decls.push_back(LocDecl);
5441 LocDeclIDsTy::iterator I =
5442 std::upper_bound(Decls.begin(), Decls.end(), LocDecl, llvm::less_first());
5444 Decls.insert(I, LocDecl);
5447 void ASTRecordWriter::AddDeclarationName(DeclarationName Name) {
5448 // FIXME: Emit a stable enum for NameKind. 0 = Identifier etc.
5449 Record->push_back(Name.getNameKind());
5450 switch (Name.getNameKind()) {
5451 case DeclarationName::Identifier:
5452 AddIdentifierRef(Name.getAsIdentifierInfo());
5455 case DeclarationName::ObjCZeroArgSelector:
5456 case DeclarationName::ObjCOneArgSelector:
5457 case DeclarationName::ObjCMultiArgSelector:
5458 AddSelectorRef(Name.getObjCSelector());
5461 case DeclarationName::CXXConstructorName:
5462 case DeclarationName::CXXDestructorName:
5463 case DeclarationName::CXXConversionFunctionName:
5464 AddTypeRef(Name.getCXXNameType());
5467 case DeclarationName::CXXDeductionGuideName:
5468 AddDeclRef(Name.getCXXDeductionGuideTemplate());
5471 case DeclarationName::CXXOperatorName:
5472 Record->push_back(Name.getCXXOverloadedOperator());
5475 case DeclarationName::CXXLiteralOperatorName:
5476 AddIdentifierRef(Name.getCXXLiteralIdentifier());
5479 case DeclarationName::CXXUsingDirective:
5480 // No extra data to emit
5485 unsigned ASTWriter::getAnonymousDeclarationNumber(const NamedDecl *D) {
5486 assert(needsAnonymousDeclarationNumber(D) &&
5487 "expected an anonymous declaration");
5489 // Number the anonymous declarations within this context, if we've not
5491 auto It = AnonymousDeclarationNumbers.find(D);
5492 if (It == AnonymousDeclarationNumbers.end()) {
5493 auto *DC = D->getLexicalDeclContext();
5494 numberAnonymousDeclsWithin(DC, [&](const NamedDecl *ND, unsigned Number) {
5495 AnonymousDeclarationNumbers[ND] = Number;
5498 It = AnonymousDeclarationNumbers.find(D);
5499 assert(It != AnonymousDeclarationNumbers.end() &&
5500 "declaration not found within its lexical context");
5506 void ASTRecordWriter::AddDeclarationNameLoc(const DeclarationNameLoc &DNLoc,
5507 DeclarationName Name) {
5508 switch (Name.getNameKind()) {
5509 case DeclarationName::CXXConstructorName:
5510 case DeclarationName::CXXDestructorName:
5511 case DeclarationName::CXXConversionFunctionName:
5512 AddTypeSourceInfo(DNLoc.NamedType.TInfo);
5515 case DeclarationName::CXXOperatorName:
5516 AddSourceLocation(SourceLocation::getFromRawEncoding(
5517 DNLoc.CXXOperatorName.BeginOpNameLoc));
5519 SourceLocation::getFromRawEncoding(DNLoc.CXXOperatorName.EndOpNameLoc));
5522 case DeclarationName::CXXLiteralOperatorName:
5523 AddSourceLocation(SourceLocation::getFromRawEncoding(
5524 DNLoc.CXXLiteralOperatorName.OpNameLoc));
5527 case DeclarationName::Identifier:
5528 case DeclarationName::ObjCZeroArgSelector:
5529 case DeclarationName::ObjCOneArgSelector:
5530 case DeclarationName::ObjCMultiArgSelector:
5531 case DeclarationName::CXXUsingDirective:
5532 case DeclarationName::CXXDeductionGuideName:
5537 void ASTRecordWriter::AddDeclarationNameInfo(
5538 const DeclarationNameInfo &NameInfo) {
5539 AddDeclarationName(NameInfo.getName());
5540 AddSourceLocation(NameInfo.getLoc());
5541 AddDeclarationNameLoc(NameInfo.getInfo(), NameInfo.getName());
5544 void ASTRecordWriter::AddQualifierInfo(const QualifierInfo &Info) {
5545 AddNestedNameSpecifierLoc(Info.QualifierLoc);
5546 Record->push_back(Info.NumTemplParamLists);
5547 for (unsigned i = 0, e = Info.NumTemplParamLists; i != e; ++i)
5548 AddTemplateParameterList(Info.TemplParamLists[i]);
5551 void ASTRecordWriter::AddNestedNameSpecifier(NestedNameSpecifier *NNS) {
5552 // Nested name specifiers usually aren't too long. I think that 8 would
5553 // typically accommodate the vast majority.
5554 SmallVector<NestedNameSpecifier *, 8> NestedNames;
5556 // Push each of the NNS's onto a stack for serialization in reverse order.
5558 NestedNames.push_back(NNS);
5559 NNS = NNS->getPrefix();
5562 Record->push_back(NestedNames.size());
5563 while(!NestedNames.empty()) {
5564 NNS = NestedNames.pop_back_val();
5565 NestedNameSpecifier::SpecifierKind Kind = NNS->getKind();
5566 Record->push_back(Kind);
5568 case NestedNameSpecifier::Identifier:
5569 AddIdentifierRef(NNS->getAsIdentifier());
5572 case NestedNameSpecifier::Namespace:
5573 AddDeclRef(NNS->getAsNamespace());
5576 case NestedNameSpecifier::NamespaceAlias:
5577 AddDeclRef(NNS->getAsNamespaceAlias());
5580 case NestedNameSpecifier::TypeSpec:
5581 case NestedNameSpecifier::TypeSpecWithTemplate:
5582 AddTypeRef(QualType(NNS->getAsType(), 0));
5583 Record->push_back(Kind == NestedNameSpecifier::TypeSpecWithTemplate);
5586 case NestedNameSpecifier::Global:
5587 // Don't need to write an associated value.
5590 case NestedNameSpecifier::Super:
5591 AddDeclRef(NNS->getAsRecordDecl());
5597 void ASTRecordWriter::AddNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS) {
5598 // Nested name specifiers usually aren't too long. I think that 8 would
5599 // typically accommodate the vast majority.
5600 SmallVector<NestedNameSpecifierLoc , 8> NestedNames;
5602 // Push each of the nested-name-specifiers's onto a stack for
5603 // serialization in reverse order.
5605 NestedNames.push_back(NNS);
5606 NNS = NNS.getPrefix();
5609 Record->push_back(NestedNames.size());
5610 while(!NestedNames.empty()) {
5611 NNS = NestedNames.pop_back_val();
5612 NestedNameSpecifier::SpecifierKind Kind
5613 = NNS.getNestedNameSpecifier()->getKind();
5614 Record->push_back(Kind);
5616 case NestedNameSpecifier::Identifier:
5617 AddIdentifierRef(NNS.getNestedNameSpecifier()->getAsIdentifier());
5618 AddSourceRange(NNS.getLocalSourceRange());
5621 case NestedNameSpecifier::Namespace:
5622 AddDeclRef(NNS.getNestedNameSpecifier()->getAsNamespace());
5623 AddSourceRange(NNS.getLocalSourceRange());
5626 case NestedNameSpecifier::NamespaceAlias:
5627 AddDeclRef(NNS.getNestedNameSpecifier()->getAsNamespaceAlias());
5628 AddSourceRange(NNS.getLocalSourceRange());
5631 case NestedNameSpecifier::TypeSpec:
5632 case NestedNameSpecifier::TypeSpecWithTemplate:
5633 Record->push_back(Kind == NestedNameSpecifier::TypeSpecWithTemplate);
5634 AddTypeLoc(NNS.getTypeLoc());
5635 AddSourceLocation(NNS.getLocalSourceRange().getEnd());
5638 case NestedNameSpecifier::Global:
5639 AddSourceLocation(NNS.getLocalSourceRange().getEnd());
5642 case NestedNameSpecifier::Super:
5643 AddDeclRef(NNS.getNestedNameSpecifier()->getAsRecordDecl());
5644 AddSourceRange(NNS.getLocalSourceRange());
5650 void ASTRecordWriter::AddTemplateName(TemplateName Name) {
5651 TemplateName::NameKind Kind = Name.getKind();
5652 Record->push_back(Kind);
5654 case TemplateName::Template:
5655 AddDeclRef(Name.getAsTemplateDecl());
5658 case TemplateName::OverloadedTemplate: {
5659 OverloadedTemplateStorage *OvT = Name.getAsOverloadedTemplate();
5660 Record->push_back(OvT->size());
5661 for (const auto &I : *OvT)
5666 case TemplateName::QualifiedTemplate: {
5667 QualifiedTemplateName *QualT = Name.getAsQualifiedTemplateName();
5668 AddNestedNameSpecifier(QualT->getQualifier());
5669 Record->push_back(QualT->hasTemplateKeyword());
5670 AddDeclRef(QualT->getTemplateDecl());
5674 case TemplateName::DependentTemplate: {
5675 DependentTemplateName *DepT = Name.getAsDependentTemplateName();
5676 AddNestedNameSpecifier(DepT->getQualifier());
5677 Record->push_back(DepT->isIdentifier());
5678 if (DepT->isIdentifier())
5679 AddIdentifierRef(DepT->getIdentifier());
5681 Record->push_back(DepT->getOperator());
5685 case TemplateName::SubstTemplateTemplateParm: {
5686 SubstTemplateTemplateParmStorage *subst
5687 = Name.getAsSubstTemplateTemplateParm();
5688 AddDeclRef(subst->getParameter());
5689 AddTemplateName(subst->getReplacement());
5693 case TemplateName::SubstTemplateTemplateParmPack: {
5694 SubstTemplateTemplateParmPackStorage *SubstPack
5695 = Name.getAsSubstTemplateTemplateParmPack();
5696 AddDeclRef(SubstPack->getParameterPack());
5697 AddTemplateArgument(SubstPack->getArgumentPack());
5703 void ASTRecordWriter::AddTemplateArgument(const TemplateArgument &Arg) {
5704 Record->push_back(Arg.getKind());
5705 switch (Arg.getKind()) {
5706 case TemplateArgument::Null:
5708 case TemplateArgument::Type:
5709 AddTypeRef(Arg.getAsType());
5711 case TemplateArgument::Declaration:
5712 AddDeclRef(Arg.getAsDecl());
5713 AddTypeRef(Arg.getParamTypeForDecl());
5715 case TemplateArgument::NullPtr:
5716 AddTypeRef(Arg.getNullPtrType());
5718 case TemplateArgument::Integral:
5719 AddAPSInt(Arg.getAsIntegral());
5720 AddTypeRef(Arg.getIntegralType());
5722 case TemplateArgument::Template:
5723 AddTemplateName(Arg.getAsTemplateOrTemplatePattern());
5725 case TemplateArgument::TemplateExpansion:
5726 AddTemplateName(Arg.getAsTemplateOrTemplatePattern());
5727 if (Optional<unsigned> NumExpansions = Arg.getNumTemplateExpansions())
5728 Record->push_back(*NumExpansions + 1);
5730 Record->push_back(0);
5732 case TemplateArgument::Expression:
5733 AddStmt(Arg.getAsExpr());
5735 case TemplateArgument::Pack:
5736 Record->push_back(Arg.pack_size());
5737 for (const auto &P : Arg.pack_elements())
5738 AddTemplateArgument(P);
5743 void ASTRecordWriter::AddTemplateParameterList(
5744 const TemplateParameterList *TemplateParams) {
5745 assert(TemplateParams && "No TemplateParams!");
5746 AddSourceLocation(TemplateParams->getTemplateLoc());
5747 AddSourceLocation(TemplateParams->getLAngleLoc());
5748 AddSourceLocation(TemplateParams->getRAngleLoc());
5750 Record->push_back(TemplateParams->size());
5751 for (const auto &P : *TemplateParams)
5755 /// \brief Emit a template argument list.
5756 void ASTRecordWriter::AddTemplateArgumentList(
5757 const TemplateArgumentList *TemplateArgs) {
5758 assert(TemplateArgs && "No TemplateArgs!");
5759 Record->push_back(TemplateArgs->size());
5760 for (int i = 0, e = TemplateArgs->size(); i != e; ++i)
5761 AddTemplateArgument(TemplateArgs->get(i));
5764 void ASTRecordWriter::AddASTTemplateArgumentListInfo(
5765 const ASTTemplateArgumentListInfo *ASTTemplArgList) {
5766 assert(ASTTemplArgList && "No ASTTemplArgList!");
5767 AddSourceLocation(ASTTemplArgList->LAngleLoc);
5768 AddSourceLocation(ASTTemplArgList->RAngleLoc);
5769 Record->push_back(ASTTemplArgList->NumTemplateArgs);
5770 const TemplateArgumentLoc *TemplArgs = ASTTemplArgList->getTemplateArgs();
5771 for (int i = 0, e = ASTTemplArgList->NumTemplateArgs; i != e; ++i)
5772 AddTemplateArgumentLoc(TemplArgs[i]);
5775 void ASTRecordWriter::AddUnresolvedSet(const ASTUnresolvedSet &Set) {
5776 Record->push_back(Set.size());
5777 for (ASTUnresolvedSet::const_iterator
5778 I = Set.begin(), E = Set.end(); I != E; ++I) {
5779 AddDeclRef(I.getDecl());
5780 Record->push_back(I.getAccess());
5784 // FIXME: Move this out of the main ASTRecordWriter interface.
5785 void ASTRecordWriter::AddCXXBaseSpecifier(const CXXBaseSpecifier &Base) {
5786 Record->push_back(Base.isVirtual());
5787 Record->push_back(Base.isBaseOfClass());
5788 Record->push_back(Base.getAccessSpecifierAsWritten());
5789 Record->push_back(Base.getInheritConstructors());
5790 AddTypeSourceInfo(Base.getTypeSourceInfo());
5791 AddSourceRange(Base.getSourceRange());
5792 AddSourceLocation(Base.isPackExpansion()? Base.getEllipsisLoc()
5793 : SourceLocation());
5796 static uint64_t EmitCXXBaseSpecifiers(ASTWriter &W,
5797 ArrayRef<CXXBaseSpecifier> Bases) {
5798 ASTWriter::RecordData Record;
5799 ASTRecordWriter Writer(W, Record);
5800 Writer.push_back(Bases.size());
5802 for (auto &Base : Bases)
5803 Writer.AddCXXBaseSpecifier(Base);
5805 return Writer.Emit(serialization::DECL_CXX_BASE_SPECIFIERS);
5808 // FIXME: Move this out of the main ASTRecordWriter interface.
5809 void ASTRecordWriter::AddCXXBaseSpecifiers(ArrayRef<CXXBaseSpecifier> Bases) {
5810 AddOffset(EmitCXXBaseSpecifiers(*Writer, Bases));
5814 EmitCXXCtorInitializers(ASTWriter &W,
5815 ArrayRef<CXXCtorInitializer *> CtorInits) {
5816 ASTWriter::RecordData Record;
5817 ASTRecordWriter Writer(W, Record);
5818 Writer.push_back(CtorInits.size());
5820 for (auto *Init : CtorInits) {
5821 if (Init->isBaseInitializer()) {
5822 Writer.push_back(CTOR_INITIALIZER_BASE);
5823 Writer.AddTypeSourceInfo(Init->getTypeSourceInfo());
5824 Writer.push_back(Init->isBaseVirtual());
5825 } else if (Init->isDelegatingInitializer()) {
5826 Writer.push_back(CTOR_INITIALIZER_DELEGATING);
5827 Writer.AddTypeSourceInfo(Init->getTypeSourceInfo());
5828 } else if (Init->isMemberInitializer()){
5829 Writer.push_back(CTOR_INITIALIZER_MEMBER);
5830 Writer.AddDeclRef(Init->getMember());
5832 Writer.push_back(CTOR_INITIALIZER_INDIRECT_MEMBER);
5833 Writer.AddDeclRef(Init->getIndirectMember());
5836 Writer.AddSourceLocation(Init->getMemberLocation());
5837 Writer.AddStmt(Init->getInit());
5838 Writer.AddSourceLocation(Init->getLParenLoc());
5839 Writer.AddSourceLocation(Init->getRParenLoc());
5840 Writer.push_back(Init->isWritten());
5841 if (Init->isWritten())
5842 Writer.push_back(Init->getSourceOrder());
5845 return Writer.Emit(serialization::DECL_CXX_CTOR_INITIALIZERS);
5848 // FIXME: Move this out of the main ASTRecordWriter interface.
5849 void ASTRecordWriter::AddCXXCtorInitializers(
5850 ArrayRef<CXXCtorInitializer *> CtorInits) {
5851 AddOffset(EmitCXXCtorInitializers(*Writer, CtorInits));
5854 void ASTRecordWriter::AddCXXDefinitionData(const CXXRecordDecl *D) {
5855 auto &Data = D->data();
5856 Record->push_back(Data.IsLambda);
5857 Record->push_back(Data.UserDeclaredConstructor);
5858 Record->push_back(Data.UserDeclaredSpecialMembers);
5859 Record->push_back(Data.Aggregate);
5860 Record->push_back(Data.PlainOldData);
5861 Record->push_back(Data.Empty);
5862 Record->push_back(Data.Polymorphic);
5863 Record->push_back(Data.Abstract);
5864 Record->push_back(Data.IsStandardLayout);
5865 Record->push_back(Data.HasNoNonEmptyBases);
5866 Record->push_back(Data.HasPrivateFields);
5867 Record->push_back(Data.HasProtectedFields);
5868 Record->push_back(Data.HasPublicFields);
5869 Record->push_back(Data.HasMutableFields);
5870 Record->push_back(Data.HasVariantMembers);
5871 Record->push_back(Data.HasOnlyCMembers);
5872 Record->push_back(Data.HasInClassInitializer);
5873 Record->push_back(Data.HasUninitializedReferenceMember);
5874 Record->push_back(Data.HasUninitializedFields);
5875 Record->push_back(Data.HasInheritedConstructor);
5876 Record->push_back(Data.HasInheritedAssignment);
5877 Record->push_back(Data.NeedOverloadResolutionForMoveConstructor);
5878 Record->push_back(Data.NeedOverloadResolutionForMoveAssignment);
5879 Record->push_back(Data.NeedOverloadResolutionForDestructor);
5880 Record->push_back(Data.DefaultedMoveConstructorIsDeleted);
5881 Record->push_back(Data.DefaultedMoveAssignmentIsDeleted);
5882 Record->push_back(Data.DefaultedDestructorIsDeleted);
5883 Record->push_back(Data.HasTrivialSpecialMembers);
5884 Record->push_back(Data.DeclaredNonTrivialSpecialMembers);
5885 Record->push_back(Data.HasIrrelevantDestructor);
5886 Record->push_back(Data.HasConstexprNonCopyMoveConstructor);
5887 Record->push_back(Data.HasDefaultedDefaultConstructor);
5888 Record->push_back(Data.DefaultedDefaultConstructorIsConstexpr);
5889 Record->push_back(Data.HasConstexprDefaultConstructor);
5890 Record->push_back(Data.HasNonLiteralTypeFieldsOrBases);
5891 Record->push_back(Data.ComputedVisibleConversions);
5892 Record->push_back(Data.UserProvidedDefaultConstructor);
5893 Record->push_back(Data.DeclaredSpecialMembers);
5894 Record->push_back(Data.ImplicitCopyConstructorCanHaveConstParamForVBase);
5895 Record->push_back(Data.ImplicitCopyConstructorCanHaveConstParamForNonVBase);
5896 Record->push_back(Data.ImplicitCopyAssignmentHasConstParam);
5897 Record->push_back(Data.HasDeclaredCopyConstructorWithConstParam);
5898 Record->push_back(Data.HasDeclaredCopyAssignmentWithConstParam);
5900 // getODRHash will compute the ODRHash if it has not been previously computed.
5901 Record->push_back(D->getODRHash());
5902 bool ModulesDebugInfo = Writer->Context->getLangOpts().ModulesDebugInfo &&
5903 Writer->WritingModule && !D->isDependentType();
5904 Record->push_back(ModulesDebugInfo);
5905 if (ModulesDebugInfo)
5906 Writer->ModularCodegenDecls.push_back(Writer->GetDeclRef(D));
5908 // IsLambda bit is already saved.
5910 Record->push_back(Data.NumBases);
5911 if (Data.NumBases > 0)
5912 AddCXXBaseSpecifiers(Data.bases());
5914 // FIXME: Make VBases lazily computed when needed to avoid storing them.
5915 Record->push_back(Data.NumVBases);
5916 if (Data.NumVBases > 0)
5917 AddCXXBaseSpecifiers(Data.vbases());
5919 AddUnresolvedSet(Data.Conversions.get(*Writer->Context));
5920 AddUnresolvedSet(Data.VisibleConversions.get(*Writer->Context));
5921 // Data.Definition is the owning decl, no need to write it.
5922 AddDeclRef(D->getFirstFriend());
5924 // Add lambda-specific data.
5925 if (Data.IsLambda) {
5926 auto &Lambda = D->getLambdaData();
5927 Record->push_back(Lambda.Dependent);
5928 Record->push_back(Lambda.IsGenericLambda);
5929 Record->push_back(Lambda.CaptureDefault);
5930 Record->push_back(Lambda.NumCaptures);
5931 Record->push_back(Lambda.NumExplicitCaptures);
5932 Record->push_back(Lambda.ManglingNumber);
5933 AddDeclRef(D->getLambdaContextDecl());
5934 AddTypeSourceInfo(Lambda.MethodTyInfo);
5935 for (unsigned I = 0, N = Lambda.NumCaptures; I != N; ++I) {
5936 const LambdaCapture &Capture = Lambda.Captures[I];
5937 AddSourceLocation(Capture.getLocation());
5938 Record->push_back(Capture.isImplicit());
5939 Record->push_back(Capture.getCaptureKind());
5940 switch (Capture.getCaptureKind()) {
5948 Capture.capturesVariable() ? Capture.getCapturedVar() : nullptr;
5950 AddSourceLocation(Capture.isPackExpansion() ? Capture.getEllipsisLoc()
5951 : SourceLocation());
5958 void ASTWriter::ReaderInitialized(ASTReader *Reader) {
5959 assert(Reader && "Cannot remove chain");
5960 assert((!Chain || Chain == Reader) && "Cannot replace chain");
5961 assert(FirstDeclID == NextDeclID &&
5962 FirstTypeID == NextTypeID &&
5963 FirstIdentID == NextIdentID &&
5964 FirstMacroID == NextMacroID &&
5965 FirstSubmoduleID == NextSubmoduleID &&
5966 FirstSelectorID == NextSelectorID &&
5967 "Setting chain after writing has started.");
5971 // Note, this will get called multiple times, once one the reader starts up
5972 // and again each time it's done reading a PCH or module.
5973 FirstDeclID = NUM_PREDEF_DECL_IDS + Chain->getTotalNumDecls();
5974 FirstTypeID = NUM_PREDEF_TYPE_IDS + Chain->getTotalNumTypes();
5975 FirstIdentID = NUM_PREDEF_IDENT_IDS + Chain->getTotalNumIdentifiers();
5976 FirstMacroID = NUM_PREDEF_MACRO_IDS + Chain->getTotalNumMacros();
5977 FirstSubmoduleID = NUM_PREDEF_SUBMODULE_IDS + Chain->getTotalNumSubmodules();
5978 FirstSelectorID = NUM_PREDEF_SELECTOR_IDS + Chain->getTotalNumSelectors();
5979 NextDeclID = FirstDeclID;
5980 NextTypeID = FirstTypeID;
5981 NextIdentID = FirstIdentID;
5982 NextMacroID = FirstMacroID;
5983 NextSelectorID = FirstSelectorID;
5984 NextSubmoduleID = FirstSubmoduleID;
5987 void ASTWriter::IdentifierRead(IdentID ID, IdentifierInfo *II) {
5988 // Always keep the highest ID. See \p TypeRead() for more information.
5989 IdentID &StoredID = IdentifierIDs[II];
5994 void ASTWriter::MacroRead(serialization::MacroID ID, MacroInfo *MI) {
5995 // Always keep the highest ID. See \p TypeRead() for more information.
5996 MacroID &StoredID = MacroIDs[MI];
6001 void ASTWriter::TypeRead(TypeIdx Idx, QualType T) {
6002 // Always take the highest-numbered type index. This copes with an interesting
6003 // case for chained AST writing where we schedule writing the type and then,
6004 // later, deserialize the type from another AST. In this case, we want to
6005 // keep the higher-numbered entry so that we can properly write it out to
6007 TypeIdx &StoredIdx = TypeIdxs[T];
6008 if (Idx.getIndex() >= StoredIdx.getIndex())
6012 void ASTWriter::SelectorRead(SelectorID ID, Selector S) {
6013 // Always keep the highest ID. See \p TypeRead() for more information.
6014 SelectorID &StoredID = SelectorIDs[S];
6019 void ASTWriter::MacroDefinitionRead(serialization::PreprocessedEntityID ID,
6020 MacroDefinitionRecord *MD) {
6021 assert(MacroDefinitions.find(MD) == MacroDefinitions.end());
6022 MacroDefinitions[MD] = ID;
6025 void ASTWriter::ModuleRead(serialization::SubmoduleID ID, Module *Mod) {
6026 assert(SubmoduleIDs.find(Mod) == SubmoduleIDs.end());
6027 SubmoduleIDs[Mod] = ID;
6030 void ASTWriter::CompletedTagDefinition(const TagDecl *D) {
6031 if (Chain && Chain->isProcessingUpdateRecords()) return;
6032 assert(D->isCompleteDefinition());
6033 assert(!WritingAST && "Already writing the AST!");
6034 if (auto *RD = dyn_cast<CXXRecordDecl>(D)) {
6035 // We are interested when a PCH decl is modified.
6036 if (RD->isFromASTFile()) {
6037 // A forward reference was mutated into a definition. Rewrite it.
6038 // FIXME: This happens during template instantiation, should we
6039 // have created a new definition decl instead ?
6040 assert(isTemplateInstantiation(RD->getTemplateSpecializationKind()) &&
6041 "completed a tag from another module but not by instantiation?");
6042 DeclUpdates[RD].push_back(
6043 DeclUpdate(UPD_CXX_INSTANTIATED_CLASS_DEFINITION));
6048 static bool isImportedDeclContext(ASTReader *Chain, const Decl *D) {
6049 if (D->isFromASTFile())
6052 // The predefined __va_list_tag struct is imported if we imported any decls.
6053 // FIXME: This is a gross hack.
6054 return D == D->getASTContext().getVaListTagDecl();
6057 void ASTWriter::AddedVisibleDecl(const DeclContext *DC, const Decl *D) {
6058 if (Chain && Chain->isProcessingUpdateRecords()) return;
6059 assert(DC->isLookupContext() &&
6060 "Should not add lookup results to non-lookup contexts!");
6062 // TU is handled elsewhere.
6063 if (isa<TranslationUnitDecl>(DC))
6066 // Namespaces are handled elsewhere, except for template instantiations of
6067 // FunctionTemplateDecls in namespaces. We are interested in cases where the
6068 // local instantiations are added to an imported context. Only happens when
6069 // adding ADL lookup candidates, for example templated friends.
6070 if (isa<NamespaceDecl>(DC) && D->getFriendObjectKind() == Decl::FOK_None &&
6071 !isa<FunctionTemplateDecl>(D))
6074 // We're only interested in cases where a local declaration is added to an
6075 // imported context.
6076 if (D->isFromASTFile() || !isImportedDeclContext(Chain, cast<Decl>(DC)))
6079 assert(DC == DC->getPrimaryContext() && "added to non-primary context");
6080 assert(!getDefinitiveDeclContext(DC) && "DeclContext not definitive!");
6081 assert(!WritingAST && "Already writing the AST!");
6082 if (UpdatedDeclContexts.insert(DC) && !cast<Decl>(DC)->isFromASTFile()) {
6083 // We're adding a visible declaration to a predefined decl context. Ensure
6084 // that we write out all of its lookup results so we don't get a nasty
6085 // surprise when we try to emit its lookup table.
6086 for (auto *Child : DC->decls())
6087 DeclsToEmitEvenIfUnreferenced.push_back(Child);
6089 DeclsToEmitEvenIfUnreferenced.push_back(D);
6092 void ASTWriter::AddedCXXImplicitMember(const CXXRecordDecl *RD, const Decl *D) {
6093 if (Chain && Chain->isProcessingUpdateRecords()) return;
6094 assert(D->isImplicit());
6096 // We're only interested in cases where a local declaration is added to an
6097 // imported context.
6098 if (D->isFromASTFile() || !isImportedDeclContext(Chain, RD))
6101 if (!isa<CXXMethodDecl>(D))
6104 // A decl coming from PCH was modified.
6105 assert(RD->isCompleteDefinition());
6106 assert(!WritingAST && "Already writing the AST!");
6107 DeclUpdates[RD].push_back(DeclUpdate(UPD_CXX_ADDED_IMPLICIT_MEMBER, D));
6110 void ASTWriter::ResolvedExceptionSpec(const FunctionDecl *FD) {
6111 if (Chain && Chain->isProcessingUpdateRecords()) return;
6112 assert(!DoneWritingDeclsAndTypes && "Already done writing updates!");
6114 Chain->forEachImportedKeyDecl(FD, [&](const Decl *D) {
6115 // If we don't already know the exception specification for this redecl
6116 // chain, add an update record for it.
6117 if (isUnresolvedExceptionSpec(cast<FunctionDecl>(D)
6119 ->castAs<FunctionProtoType>()
6120 ->getExceptionSpecType()))
6121 DeclUpdates[D].push_back(UPD_CXX_RESOLVED_EXCEPTION_SPEC);
6125 void ASTWriter::DeducedReturnType(const FunctionDecl *FD, QualType ReturnType) {
6126 if (Chain && Chain->isProcessingUpdateRecords()) return;
6127 assert(!WritingAST && "Already writing the AST!");
6129 Chain->forEachImportedKeyDecl(FD, [&](const Decl *D) {
6130 DeclUpdates[D].push_back(
6131 DeclUpdate(UPD_CXX_DEDUCED_RETURN_TYPE, ReturnType));
6135 void ASTWriter::ResolvedOperatorDelete(const CXXDestructorDecl *DD,
6136 const FunctionDecl *Delete) {
6137 if (Chain && Chain->isProcessingUpdateRecords()) return;
6138 assert(!WritingAST && "Already writing the AST!");
6139 assert(Delete && "Not given an operator delete");
6141 Chain->forEachImportedKeyDecl(DD, [&](const Decl *D) {
6142 DeclUpdates[D].push_back(DeclUpdate(UPD_CXX_RESOLVED_DTOR_DELETE, Delete));
6146 void ASTWriter::CompletedImplicitDefinition(const FunctionDecl *D) {
6147 if (Chain && Chain->isProcessingUpdateRecords()) return;
6148 assert(!WritingAST && "Already writing the AST!");
6149 if (!D->isFromASTFile())
6150 return; // Declaration not imported from PCH.
6152 // Implicit function decl from a PCH was defined.
6153 DeclUpdates[D].push_back(DeclUpdate(UPD_CXX_ADDED_FUNCTION_DEFINITION));
6156 void ASTWriter::FunctionDefinitionInstantiated(const FunctionDecl *D) {
6157 if (Chain && Chain->isProcessingUpdateRecords()) return;
6158 assert(!WritingAST && "Already writing the AST!");
6159 if (!D->isFromASTFile())
6162 DeclUpdates[D].push_back(DeclUpdate(UPD_CXX_ADDED_FUNCTION_DEFINITION));
6165 void ASTWriter::StaticDataMemberInstantiated(const VarDecl *D) {
6166 if (Chain && Chain->isProcessingUpdateRecords()) return;
6167 assert(!WritingAST && "Already writing the AST!");
6168 if (!D->isFromASTFile())
6171 // Since the actual instantiation is delayed, this really means that we need
6172 // to update the instantiation location.
6173 DeclUpdates[D].push_back(
6174 DeclUpdate(UPD_CXX_INSTANTIATED_STATIC_DATA_MEMBER,
6175 D->getMemberSpecializationInfo()->getPointOfInstantiation()));
6178 void ASTWriter::DefaultArgumentInstantiated(const ParmVarDecl *D) {
6179 if (Chain && Chain->isProcessingUpdateRecords()) return;
6180 assert(!WritingAST && "Already writing the AST!");
6181 if (!D->isFromASTFile())
6184 DeclUpdates[D].push_back(
6185 DeclUpdate(UPD_CXX_INSTANTIATED_DEFAULT_ARGUMENT, D));
6188 void ASTWriter::DefaultMemberInitializerInstantiated(const FieldDecl *D) {
6189 assert(!WritingAST && "Already writing the AST!");
6190 if (!D->isFromASTFile())
6193 DeclUpdates[D].push_back(
6194 DeclUpdate(UPD_CXX_INSTANTIATED_DEFAULT_MEMBER_INITIALIZER, D));
6197 void ASTWriter::AddedObjCCategoryToInterface(const ObjCCategoryDecl *CatD,
6198 const ObjCInterfaceDecl *IFD) {
6199 if (Chain && Chain->isProcessingUpdateRecords()) return;
6200 assert(!WritingAST && "Already writing the AST!");
6201 if (!IFD->isFromASTFile())
6202 return; // Declaration not imported from PCH.
6204 assert(IFD->getDefinition() && "Category on a class without a definition?");
6205 ObjCClassesWithCategories.insert(
6206 const_cast<ObjCInterfaceDecl *>(IFD->getDefinition()));
6209 void ASTWriter::DeclarationMarkedUsed(const Decl *D) {
6210 if (Chain && Chain->isProcessingUpdateRecords()) return;
6211 assert(!WritingAST && "Already writing the AST!");
6213 // If there is *any* declaration of the entity that's not from an AST file,
6214 // we can skip writing the update record. We make sure that isUsed() triggers
6215 // completion of the redeclaration chain of the entity.
6216 for (auto Prev = D->getMostRecentDecl(); Prev; Prev = Prev->getPreviousDecl())
6217 if (IsLocalDecl(Prev))
6220 DeclUpdates[D].push_back(DeclUpdate(UPD_DECL_MARKED_USED));
6223 void ASTWriter::DeclarationMarkedOpenMPThreadPrivate(const Decl *D) {
6224 if (Chain && Chain->isProcessingUpdateRecords()) return;
6225 assert(!WritingAST && "Already writing the AST!");
6226 if (!D->isFromASTFile())
6229 DeclUpdates[D].push_back(DeclUpdate(UPD_DECL_MARKED_OPENMP_THREADPRIVATE));
6232 void ASTWriter::DeclarationMarkedOpenMPDeclareTarget(const Decl *D,
6234 if (Chain && Chain->isProcessingUpdateRecords()) return;
6235 assert(!WritingAST && "Already writing the AST!");
6236 if (!D->isFromASTFile())
6239 DeclUpdates[D].push_back(
6240 DeclUpdate(UPD_DECL_MARKED_OPENMP_DECLARETARGET, Attr));
6243 void ASTWriter::RedefinedHiddenDefinition(const NamedDecl *D, Module *M) {
6244 if (Chain && Chain->isProcessingUpdateRecords()) return;
6245 assert(!WritingAST && "Already writing the AST!");
6246 assert(D->isHidden() && "expected a hidden declaration");
6247 DeclUpdates[D].push_back(DeclUpdate(UPD_DECL_EXPORTED, M));
6250 void ASTWriter::AddedAttributeToRecord(const Attr *Attr,
6251 const RecordDecl *Record) {
6252 if (Chain && Chain->isProcessingUpdateRecords()) return;
6253 assert(!WritingAST && "Already writing the AST!");
6254 if (!Record->isFromASTFile())
6256 DeclUpdates[Record].push_back(DeclUpdate(UPD_ADDED_ATTR_TO_RECORD, Attr));
6259 void ASTWriter::AddedCXXTemplateSpecialization(
6260 const ClassTemplateDecl *TD, const ClassTemplateSpecializationDecl *D) {
6261 assert(!WritingAST && "Already writing the AST!");
6263 if (!TD->getFirstDecl()->isFromASTFile())
6265 if (Chain && Chain->isProcessingUpdateRecords())
6268 DeclsToEmitEvenIfUnreferenced.push_back(D);
6271 void ASTWriter::AddedCXXTemplateSpecialization(
6272 const VarTemplateDecl *TD, const VarTemplateSpecializationDecl *D) {
6273 assert(!WritingAST && "Already writing the AST!");
6275 if (!TD->getFirstDecl()->isFromASTFile())
6277 if (Chain && Chain->isProcessingUpdateRecords())
6280 DeclsToEmitEvenIfUnreferenced.push_back(D);
6283 void ASTWriter::AddedCXXTemplateSpecialization(const FunctionTemplateDecl *TD,
6284 const FunctionDecl *D) {
6285 assert(!WritingAST && "Already writing the AST!");
6287 if (!TD->getFirstDecl()->isFromASTFile())
6289 if (Chain && Chain->isProcessingUpdateRecords())
6292 DeclsToEmitEvenIfUnreferenced.push_back(D);