1 //===--- ASTWriterStmt.cpp - Statement and Expression Serialization -------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 ///
9 /// \file
10 /// Implements serialization for Statements and Expressions.
11 ///
12 //===----------------------------------------------------------------------===//
13 
14 #include "clang/Serialization/ASTRecordWriter.h"
15 #include "clang/Sema/DeclSpec.h"
16 #include "clang/AST/ASTContext.h"
17 #include "clang/AST/DeclCXX.h"
18 #include "clang/AST/DeclObjC.h"
19 #include "clang/AST/DeclTemplate.h"
20 #include "clang/AST/StmtVisitor.h"
21 #include "clang/Lex/Token.h"
22 #include "llvm/Bitstream/BitstreamWriter.h"
23 using namespace clang;
24 
25 //===----------------------------------------------------------------------===//
26 // Statement/expression serialization
27 //===----------------------------------------------------------------------===//
28 
29 namespace clang {
30 
31   class ASTStmtWriter : public StmtVisitor<ASTStmtWriter, void> {
32     ASTWriter &Writer;
33     ASTRecordWriter Record;
34 
35     serialization::StmtCode Code;
36     unsigned AbbrevToUse;
37 
38   public:
39     ASTStmtWriter(ASTWriter &Writer, ASTWriter::RecordData &Record)
40         : Writer(Writer), Record(Writer, Record),
41           Code(serialization::STMT_NULL_PTR), AbbrevToUse(0) {}
42 
43     ASTStmtWriter(const ASTStmtWriter&) = delete;
44 
45     uint64_t Emit() {
46       assert(Code != serialization::STMT_NULL_PTR &&
47              "unhandled sub-statement writing AST file");
48       return Record.EmitStmt(Code, AbbrevToUse);
49     }
50 
51     void AddTemplateKWAndArgsInfo(const ASTTemplateKWAndArgsInfo &ArgInfo,
52                                   const TemplateArgumentLoc *Args);
53 
54     void VisitStmt(Stmt *S);
55 #define STMT(Type, Base) \
56     void Visit##Type(Type *);
57 #include "clang/AST/StmtNodes.inc"
58   };
59 }
60 
61 void ASTStmtWriter::AddTemplateKWAndArgsInfo(
62     const ASTTemplateKWAndArgsInfo &ArgInfo, const TemplateArgumentLoc *Args) {
63   Record.AddSourceLocation(ArgInfo.TemplateKWLoc);
64   Record.AddSourceLocation(ArgInfo.LAngleLoc);
65   Record.AddSourceLocation(ArgInfo.RAngleLoc);
66   for (unsigned i = 0; i != ArgInfo.NumTemplateArgs; ++i)
67     Record.AddTemplateArgumentLoc(Args[i]);
68 }
69 
70 void ASTStmtWriter::VisitStmt(Stmt *S) {
71 }
72 
73 void ASTStmtWriter::VisitNullStmt(NullStmt *S) {
74   VisitStmt(S);
75   Record.AddSourceLocation(S->getSemiLoc());
76   Record.push_back(S->NullStmtBits.HasLeadingEmptyMacro);
77   Code = serialization::STMT_NULL;
78 }
79 
80 void ASTStmtWriter::VisitCompoundStmt(CompoundStmt *S) {
81   VisitStmt(S);
82   Record.push_back(S->size());
83   for (auto *CS : S->body())
84     Record.AddStmt(CS);
85   Record.AddSourceLocation(S->getLBracLoc());
86   Record.AddSourceLocation(S->getRBracLoc());
87   Code = serialization::STMT_COMPOUND;
88 }
89 
90 void ASTStmtWriter::VisitSwitchCase(SwitchCase *S) {
91   VisitStmt(S);
92   Record.push_back(Writer.getSwitchCaseID(S));
93   Record.AddSourceLocation(S->getKeywordLoc());
94   Record.AddSourceLocation(S->getColonLoc());
95 }
96 
97 void ASTStmtWriter::VisitCaseStmt(CaseStmt *S) {
98   VisitSwitchCase(S);
99   Record.push_back(S->caseStmtIsGNURange());
100   Record.AddStmt(S->getLHS());
101   Record.AddStmt(S->getSubStmt());
102   if (S->caseStmtIsGNURange()) {
103     Record.AddStmt(S->getRHS());
104     Record.AddSourceLocation(S->getEllipsisLoc());
105   }
106   Code = serialization::STMT_CASE;
107 }
108 
109 void ASTStmtWriter::VisitDefaultStmt(DefaultStmt *S) {
110   VisitSwitchCase(S);
111   Record.AddStmt(S->getSubStmt());
112   Code = serialization::STMT_DEFAULT;
113 }
114 
115 void ASTStmtWriter::VisitLabelStmt(LabelStmt *S) {
116   VisitStmt(S);
117   Record.AddDeclRef(S->getDecl());
118   Record.AddStmt(S->getSubStmt());
119   Record.AddSourceLocation(S->getIdentLoc());
120   Code = serialization::STMT_LABEL;
121 }
122 
123 void ASTStmtWriter::VisitAttributedStmt(AttributedStmt *S) {
124   VisitStmt(S);
125   Record.push_back(S->getAttrs().size());
126   Record.AddAttributes(S->getAttrs());
127   Record.AddStmt(S->getSubStmt());
128   Record.AddSourceLocation(S->getAttrLoc());
129   Code = serialization::STMT_ATTRIBUTED;
130 }
131 
132 void ASTStmtWriter::VisitIfStmt(IfStmt *S) {
133   VisitStmt(S);
134 
135   bool HasElse = S->getElse() != nullptr;
136   bool HasVar = S->getConditionVariableDeclStmt() != nullptr;
137   bool HasInit = S->getInit() != nullptr;
138 
139   Record.push_back(S->isConstexpr());
140   Record.push_back(HasElse);
141   Record.push_back(HasVar);
142   Record.push_back(HasInit);
143 
144   Record.AddStmt(S->getCond());
145   Record.AddStmt(S->getThen());
146   if (HasElse)
147     Record.AddStmt(S->getElse());
148   if (HasVar)
149     Record.AddDeclRef(S->getConditionVariable());
150   if (HasInit)
151     Record.AddStmt(S->getInit());
152 
153   Record.AddSourceLocation(S->getIfLoc());
154   if (HasElse)
155     Record.AddSourceLocation(S->getElseLoc());
156 
157   Code = serialization::STMT_IF;
158 }
159 
160 void ASTStmtWriter::VisitSwitchStmt(SwitchStmt *S) {
161   VisitStmt(S);
162 
163   bool HasInit = S->getInit() != nullptr;
164   bool HasVar = S->getConditionVariableDeclStmt() != nullptr;
165   Record.push_back(HasInit);
166   Record.push_back(HasVar);
167   Record.push_back(S->isAllEnumCasesCovered());
168 
169   Record.AddStmt(S->getCond());
170   Record.AddStmt(S->getBody());
171   if (HasInit)
172     Record.AddStmt(S->getInit());
173   if (HasVar)
174     Record.AddDeclRef(S->getConditionVariable());
175 
176   Record.AddSourceLocation(S->getSwitchLoc());
177 
178   for (SwitchCase *SC = S->getSwitchCaseList(); SC;
179        SC = SC->getNextSwitchCase())
180     Record.push_back(Writer.RecordSwitchCaseID(SC));
181   Code = serialization::STMT_SWITCH;
182 }
183 
184 void ASTStmtWriter::VisitWhileStmt(WhileStmt *S) {
185   VisitStmt(S);
186 
187   bool HasVar = S->getConditionVariableDeclStmt() != nullptr;
188   Record.push_back(HasVar);
189 
190   Record.AddStmt(S->getCond());
191   Record.AddStmt(S->getBody());
192   if (HasVar)
193     Record.AddDeclRef(S->getConditionVariable());
194 
195   Record.AddSourceLocation(S->getWhileLoc());
196   Code = serialization::STMT_WHILE;
197 }
198 
199 void ASTStmtWriter::VisitDoStmt(DoStmt *S) {
200   VisitStmt(S);
201   Record.AddStmt(S->getCond());
202   Record.AddStmt(S->getBody());
203   Record.AddSourceLocation(S->getDoLoc());
204   Record.AddSourceLocation(S->getWhileLoc());
205   Record.AddSourceLocation(S->getRParenLoc());
206   Code = serialization::STMT_DO;
207 }
208 
209 void ASTStmtWriter::VisitForStmt(ForStmt *S) {
210   VisitStmt(S);
211   Record.AddStmt(S->getInit());
212   Record.AddStmt(S->getCond());
213   Record.AddDeclRef(S->getConditionVariable());
214   Record.AddStmt(S->getInc());
215   Record.AddStmt(S->getBody());
216   Record.AddSourceLocation(S->getForLoc());
217   Record.AddSourceLocation(S->getLParenLoc());
218   Record.AddSourceLocation(S->getRParenLoc());
219   Code = serialization::STMT_FOR;
220 }
221 
222 void ASTStmtWriter::VisitGotoStmt(GotoStmt *S) {
223   VisitStmt(S);
224   Record.AddDeclRef(S->getLabel());
225   Record.AddSourceLocation(S->getGotoLoc());
226   Record.AddSourceLocation(S->getLabelLoc());
227   Code = serialization::STMT_GOTO;
228 }
229 
230 void ASTStmtWriter::VisitIndirectGotoStmt(IndirectGotoStmt *S) {
231   VisitStmt(S);
232   Record.AddSourceLocation(S->getGotoLoc());
233   Record.AddSourceLocation(S->getStarLoc());
234   Record.AddStmt(S->getTarget());
235   Code = serialization::STMT_INDIRECT_GOTO;
236 }
237 
238 void ASTStmtWriter::VisitContinueStmt(ContinueStmt *S) {
239   VisitStmt(S);
240   Record.AddSourceLocation(S->getContinueLoc());
241   Code = serialization::STMT_CONTINUE;
242 }
243 
244 void ASTStmtWriter::VisitBreakStmt(BreakStmt *S) {
245   VisitStmt(S);
246   Record.AddSourceLocation(S->getBreakLoc());
247   Code = serialization::STMT_BREAK;
248 }
249 
250 void ASTStmtWriter::VisitReturnStmt(ReturnStmt *S) {
251   VisitStmt(S);
252 
253   bool HasNRVOCandidate = S->getNRVOCandidate() != nullptr;
254   Record.push_back(HasNRVOCandidate);
255 
256   Record.AddStmt(S->getRetValue());
257   if (HasNRVOCandidate)
258     Record.AddDeclRef(S->getNRVOCandidate());
259 
260   Record.AddSourceLocation(S->getReturnLoc());
261   Code = serialization::STMT_RETURN;
262 }
263 
264 void ASTStmtWriter::VisitDeclStmt(DeclStmt *S) {
265   VisitStmt(S);
266   Record.AddSourceLocation(S->getBeginLoc());
267   Record.AddSourceLocation(S->getEndLoc());
268   DeclGroupRef DG = S->getDeclGroup();
269   for (DeclGroupRef::iterator D = DG.begin(), DEnd = DG.end(); D != DEnd; ++D)
270     Record.AddDeclRef(*D);
271   Code = serialization::STMT_DECL;
272 }
273 
274 void ASTStmtWriter::VisitAsmStmt(AsmStmt *S) {
275   VisitStmt(S);
276   Record.push_back(S->getNumOutputs());
277   Record.push_back(S->getNumInputs());
278   Record.push_back(S->getNumClobbers());
279   Record.AddSourceLocation(S->getAsmLoc());
280   Record.push_back(S->isVolatile());
281   Record.push_back(S->isSimple());
282 }
283 
284 void ASTStmtWriter::VisitGCCAsmStmt(GCCAsmStmt *S) {
285   VisitAsmStmt(S);
286   Record.push_back(S->getNumLabels());
287   Record.AddSourceLocation(S->getRParenLoc());
288   Record.AddStmt(S->getAsmString());
289 
290   // Outputs
291   for (unsigned I = 0, N = S->getNumOutputs(); I != N; ++I) {
292     Record.AddIdentifierRef(S->getOutputIdentifier(I));
293     Record.AddStmt(S->getOutputConstraintLiteral(I));
294     Record.AddStmt(S->getOutputExpr(I));
295   }
296 
297   // Inputs
298   for (unsigned I = 0, N = S->getNumInputs(); I != N; ++I) {
299     Record.AddIdentifierRef(S->getInputIdentifier(I));
300     Record.AddStmt(S->getInputConstraintLiteral(I));
301     Record.AddStmt(S->getInputExpr(I));
302   }
303 
304   // Clobbers
305   for (unsigned I = 0, N = S->getNumClobbers(); I != N; ++I)
306     Record.AddStmt(S->getClobberStringLiteral(I));
307 
308   // Labels
309   for (auto *E : S->labels()) Record.AddStmt(E);
310 
311   Code = serialization::STMT_GCCASM;
312 }
313 
314 void ASTStmtWriter::VisitMSAsmStmt(MSAsmStmt *S) {
315   VisitAsmStmt(S);
316   Record.AddSourceLocation(S->getLBraceLoc());
317   Record.AddSourceLocation(S->getEndLoc());
318   Record.push_back(S->getNumAsmToks());
319   Record.AddString(S->getAsmString());
320 
321   // Tokens
322   for (unsigned I = 0, N = S->getNumAsmToks(); I != N; ++I) {
323     // FIXME: Move this to ASTRecordWriter?
324     Writer.AddToken(S->getAsmToks()[I], Record.getRecordData());
325   }
326 
327   // Clobbers
328   for (unsigned I = 0, N = S->getNumClobbers(); I != N; ++I) {
329     Record.AddString(S->getClobber(I));
330   }
331 
332   // Outputs
333   for (unsigned I = 0, N = S->getNumOutputs(); I != N; ++I) {
334     Record.AddStmt(S->getOutputExpr(I));
335     Record.AddString(S->getOutputConstraint(I));
336   }
337 
338   // Inputs
339   for (unsigned I = 0, N = S->getNumInputs(); I != N; ++I) {
340     Record.AddStmt(S->getInputExpr(I));
341     Record.AddString(S->getInputConstraint(I));
342   }
343 
344   Code = serialization::STMT_MSASM;
345 }
346 
347 void ASTStmtWriter::VisitCoroutineBodyStmt(CoroutineBodyStmt *CoroStmt) {
348   VisitStmt(CoroStmt);
349   Record.push_back(CoroStmt->getParamMoves().size());
350   for (Stmt *S : CoroStmt->children())
351     Record.AddStmt(S);
352   Code = serialization::STMT_COROUTINE_BODY;
353 }
354 
355 void ASTStmtWriter::VisitCoreturnStmt(CoreturnStmt *S) {
356   VisitStmt(S);
357   Record.AddSourceLocation(S->getKeywordLoc());
358   Record.AddStmt(S->getOperand());
359   Record.AddStmt(S->getPromiseCall());
360   Record.push_back(S->isImplicit());
361   Code = serialization::STMT_CORETURN;
362 }
363 
364 void ASTStmtWriter::VisitCoroutineSuspendExpr(CoroutineSuspendExpr *E) {
365   VisitExpr(E);
366   Record.AddSourceLocation(E->getKeywordLoc());
367   for (Stmt *S : E->children())
368     Record.AddStmt(S);
369   Record.AddStmt(E->getOpaqueValue());
370 }
371 
372 void ASTStmtWriter::VisitCoawaitExpr(CoawaitExpr *E) {
373   VisitCoroutineSuspendExpr(E);
374   Record.push_back(E->isImplicit());
375   Code = serialization::EXPR_COAWAIT;
376 }
377 
378 void ASTStmtWriter::VisitCoyieldExpr(CoyieldExpr *E) {
379   VisitCoroutineSuspendExpr(E);
380   Code = serialization::EXPR_COYIELD;
381 }
382 
383 void ASTStmtWriter::VisitDependentCoawaitExpr(DependentCoawaitExpr *E) {
384   VisitExpr(E);
385   Record.AddSourceLocation(E->getKeywordLoc());
386   for (Stmt *S : E->children())
387     Record.AddStmt(S);
388   Code = serialization::EXPR_DEPENDENT_COAWAIT;
389 }
390 
391 static void
392 addConstraintSatisfaction(ASTRecordWriter &Record,
393                           const ASTConstraintSatisfaction &Satisfaction) {
394   Record.push_back(Satisfaction.IsSatisfied);
395   if (!Satisfaction.IsSatisfied) {
396     Record.push_back(Satisfaction.NumRecords);
397     for (const auto &DetailRecord : Satisfaction) {
398       Record.AddStmt(const_cast<Expr *>(DetailRecord.first));
399       auto *E = DetailRecord.second.dyn_cast<Expr *>();
400       Record.push_back(E == nullptr);
401       if (E)
402         Record.AddStmt(E);
403       else {
404         auto *Diag = DetailRecord.second.get<std::pair<SourceLocation,
405                                                        StringRef> *>();
406         Record.AddSourceLocation(Diag->first);
407         Record.AddString(Diag->second);
408       }
409     }
410   }
411 }
412 
413 static void
414 addSubstitutionDiagnostic(
415     ASTRecordWriter &Record,
416     const concepts::Requirement::SubstitutionDiagnostic *D) {
417   Record.AddString(D->SubstitutedEntity);
418   Record.AddSourceLocation(D->DiagLoc);
419   Record.AddString(D->DiagMessage);
420 }
421 
422 void ASTStmtWriter::VisitConceptSpecializationExpr(
423         ConceptSpecializationExpr *E) {
424   VisitExpr(E);
425   ArrayRef<TemplateArgument> TemplateArgs = E->getTemplateArguments();
426   Record.push_back(TemplateArgs.size());
427   Record.AddNestedNameSpecifierLoc(E->getNestedNameSpecifierLoc());
428   Record.AddSourceLocation(E->getTemplateKWLoc());
429   Record.AddDeclarationNameInfo(E->getConceptNameInfo());
430   Record.AddDeclRef(E->getNamedConcept());
431   Record.AddDeclRef(E->getFoundDecl());
432   Record.AddASTTemplateArgumentListInfo(E->getTemplateArgsAsWritten());
433   for (const TemplateArgument &Arg : TemplateArgs)
434     Record.AddTemplateArgument(Arg);
435   if (!E->isValueDependent())
436     addConstraintSatisfaction(Record, E->getSatisfaction());
437 
438   Code = serialization::EXPR_CONCEPT_SPECIALIZATION;
439 }
440 
441 void ASTStmtWriter::VisitRequiresExpr(RequiresExpr *E) {
442   VisitExpr(E);
443   Record.push_back(E->getLocalParameters().size());
444   Record.push_back(E->getRequirements().size());
445   Record.AddSourceLocation(E->RequiresExprBits.RequiresKWLoc);
446   Record.push_back(E->RequiresExprBits.IsSatisfied);
447   Record.AddDeclRef(E->getBody());
448   for (ParmVarDecl *P : E->getLocalParameters())
449     Record.AddDeclRef(P);
450   for (concepts::Requirement *R : E->getRequirements()) {
451     if (auto *TypeReq = dyn_cast<concepts::TypeRequirement>(R)) {
452       Record.push_back(concepts::Requirement::RK_Type);
453       Record.push_back(TypeReq->Status);
454       if (TypeReq->Status == concepts::TypeRequirement::SS_SubstitutionFailure)
455         addSubstitutionDiagnostic(Record, TypeReq->getSubstitutionDiagnostic());
456       else
457         Record.AddTypeSourceInfo(TypeReq->getType());
458     } else if (auto *ExprReq = dyn_cast<concepts::ExprRequirement>(R)) {
459       Record.push_back(ExprReq->getKind());
460       Record.push_back(ExprReq->Status);
461       if (ExprReq->isExprSubstitutionFailure()) {
462         addSubstitutionDiagnostic(Record,
463          ExprReq->Value.get<concepts::Requirement::SubstitutionDiagnostic *>());
464       } else
465         Record.AddStmt(ExprReq->Value.get<Expr *>());
466       if (ExprReq->getKind() == concepts::Requirement::RK_Compound) {
467         Record.AddSourceLocation(ExprReq->NoexceptLoc);
468         const auto &RetReq = ExprReq->getReturnTypeRequirement();
469         if (RetReq.isSubstitutionFailure()) {
470           Record.push_back(2);
471           addSubstitutionDiagnostic(Record, RetReq.getSubstitutionDiagnostic());
472         } else if (RetReq.isTypeConstraint()) {
473           Record.push_back(1);
474           Record.AddTemplateParameterList(
475               RetReq.getTypeConstraintTemplateParameterList());
476           if (ExprReq->Status >=
477               concepts::ExprRequirement::SS_ConstraintsNotSatisfied)
478             Record.AddStmt(
479                 ExprReq->getReturnTypeRequirementSubstitutedConstraintExpr());
480         } else {
481           assert(RetReq.isEmpty());
482           Record.push_back(0);
483         }
484       }
485     } else {
486       auto *NestedReq = cast<concepts::NestedRequirement>(R);
487       Record.push_back(concepts::Requirement::RK_Nested);
488       Record.push_back(NestedReq->isSubstitutionFailure());
489       if (NestedReq->isSubstitutionFailure()){
490         addSubstitutionDiagnostic(Record,
491                                   NestedReq->getSubstitutionDiagnostic());
492       } else {
493         Record.AddStmt(NestedReq->Value.get<Expr *>());
494         if (!NestedReq->isDependent())
495           addConstraintSatisfaction(Record, *NestedReq->Satisfaction);
496       }
497     }
498   }
499   Record.AddSourceLocation(E->getEndLoc());
500 
501   Code = serialization::EXPR_REQUIRES;
502 }
503 
504 
505 void ASTStmtWriter::VisitCapturedStmt(CapturedStmt *S) {
506   VisitStmt(S);
507   // NumCaptures
508   Record.push_back(std::distance(S->capture_begin(), S->capture_end()));
509 
510   // CapturedDecl and captured region kind
511   Record.AddDeclRef(S->getCapturedDecl());
512   Record.push_back(S->getCapturedRegionKind());
513 
514   Record.AddDeclRef(S->getCapturedRecordDecl());
515 
516   // Capture inits
517   for (auto *I : S->capture_inits())
518     Record.AddStmt(I);
519 
520   // Body
521   Record.AddStmt(S->getCapturedStmt());
522 
523   // Captures
524   for (const auto &I : S->captures()) {
525     if (I.capturesThis() || I.capturesVariableArrayType())
526       Record.AddDeclRef(nullptr);
527     else
528       Record.AddDeclRef(I.getCapturedVar());
529     Record.push_back(I.getCaptureKind());
530     Record.AddSourceLocation(I.getLocation());
531   }
532 
533   Code = serialization::STMT_CAPTURED;
534 }
535 
536 void ASTStmtWriter::VisitExpr(Expr *E) {
537   VisitStmt(E);
538   Record.AddTypeRef(E->getType());
539   Record.push_back(E->isTypeDependent());
540   Record.push_back(E->isValueDependent());
541   Record.push_back(E->isInstantiationDependent());
542   Record.push_back(E->containsUnexpandedParameterPack());
543   Record.push_back(E->containsErrors());
544   Record.push_back(E->getValueKind());
545   Record.push_back(E->getObjectKind());
546 }
547 
548 void ASTStmtWriter::VisitConstantExpr(ConstantExpr *E) {
549   VisitExpr(E);
550   Record.push_back(static_cast<uint64_t>(E->ConstantExprBits.ResultKind));
551   switch (E->ConstantExprBits.ResultKind) {
552   case ConstantExpr::RSK_Int64:
553     Record.push_back(E->Int64Result());
554     Record.push_back(E->ConstantExprBits.IsUnsigned |
555                      E->ConstantExprBits.BitWidth << 1);
556     break;
557   case ConstantExpr::RSK_APValue:
558     Record.AddAPValue(E->APValueResult());
559   }
560   Record.AddStmt(E->getSubExpr());
561   Code = serialization::EXPR_CONSTANT;
562 }
563 
564 void ASTStmtWriter::VisitPredefinedExpr(PredefinedExpr *E) {
565   VisitExpr(E);
566 
567   bool HasFunctionName = E->getFunctionName() != nullptr;
568   Record.push_back(HasFunctionName);
569   Record.push_back(E->getIdentKind()); // FIXME: stable encoding
570   Record.AddSourceLocation(E->getLocation());
571   if (HasFunctionName)
572     Record.AddStmt(E->getFunctionName());
573   Code = serialization::EXPR_PREDEFINED;
574 }
575 
576 void ASTStmtWriter::VisitDeclRefExpr(DeclRefExpr *E) {
577   VisitExpr(E);
578 
579   Record.push_back(E->hasQualifier());
580   Record.push_back(E->getDecl() != E->getFoundDecl());
581   Record.push_back(E->hasTemplateKWAndArgsInfo());
582   Record.push_back(E->hadMultipleCandidates());
583   Record.push_back(E->refersToEnclosingVariableOrCapture());
584   Record.push_back(E->isNonOdrUse());
585 
586   if (E->hasTemplateKWAndArgsInfo()) {
587     unsigned NumTemplateArgs = E->getNumTemplateArgs();
588     Record.push_back(NumTemplateArgs);
589   }
590 
591   DeclarationName::NameKind nk = (E->getDecl()->getDeclName().getNameKind());
592 
593   if ((!E->hasTemplateKWAndArgsInfo()) && (!E->hasQualifier()) &&
594       (E->getDecl() == E->getFoundDecl()) &&
595       nk == DeclarationName::Identifier &&
596       !E->refersToEnclosingVariableOrCapture() && !E->isNonOdrUse()) {
597     AbbrevToUse = Writer.getDeclRefExprAbbrev();
598   }
599 
600   if (E->hasQualifier())
601     Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
602 
603   if (E->getDecl() != E->getFoundDecl())
604     Record.AddDeclRef(E->getFoundDecl());
605 
606   if (E->hasTemplateKWAndArgsInfo())
607     AddTemplateKWAndArgsInfo(*E->getTrailingObjects<ASTTemplateKWAndArgsInfo>(),
608                              E->getTrailingObjects<TemplateArgumentLoc>());
609 
610   Record.AddDeclRef(E->getDecl());
611   Record.AddSourceLocation(E->getLocation());
612   Record.AddDeclarationNameLoc(E->DNLoc, E->getDecl()->getDeclName());
613   Code = serialization::EXPR_DECL_REF;
614 }
615 
616 void ASTStmtWriter::VisitIntegerLiteral(IntegerLiteral *E) {
617   VisitExpr(E);
618   Record.AddSourceLocation(E->getLocation());
619   Record.AddAPInt(E->getValue());
620 
621   if (E->getValue().getBitWidth() == 32) {
622     AbbrevToUse = Writer.getIntegerLiteralAbbrev();
623   }
624 
625   Code = serialization::EXPR_INTEGER_LITERAL;
626 }
627 
628 void ASTStmtWriter::VisitFixedPointLiteral(FixedPointLiteral *E) {
629   VisitExpr(E);
630   Record.AddSourceLocation(E->getLocation());
631   Record.AddAPInt(E->getValue());
632   Code = serialization::EXPR_INTEGER_LITERAL;
633 }
634 
635 void ASTStmtWriter::VisitFloatingLiteral(FloatingLiteral *E) {
636   VisitExpr(E);
637   Record.push_back(E->getRawSemantics());
638   Record.push_back(E->isExact());
639   Record.AddAPFloat(E->getValue());
640   Record.AddSourceLocation(E->getLocation());
641   Code = serialization::EXPR_FLOATING_LITERAL;
642 }
643 
644 void ASTStmtWriter::VisitImaginaryLiteral(ImaginaryLiteral *E) {
645   VisitExpr(E);
646   Record.AddStmt(E->getSubExpr());
647   Code = serialization::EXPR_IMAGINARY_LITERAL;
648 }
649 
650 void ASTStmtWriter::VisitStringLiteral(StringLiteral *E) {
651   VisitExpr(E);
652 
653   // Store the various bits of data of StringLiteral.
654   Record.push_back(E->getNumConcatenated());
655   Record.push_back(E->getLength());
656   Record.push_back(E->getCharByteWidth());
657   Record.push_back(E->getKind());
658   Record.push_back(E->isPascal());
659 
660   // Store the trailing array of SourceLocation.
661   for (unsigned I = 0, N = E->getNumConcatenated(); I != N; ++I)
662     Record.AddSourceLocation(E->getStrTokenLoc(I));
663 
664   // Store the trailing array of char holding the string data.
665   StringRef StrData = E->getBytes();
666   for (unsigned I = 0, N = E->getByteLength(); I != N; ++I)
667     Record.push_back(StrData[I]);
668 
669   Code = serialization::EXPR_STRING_LITERAL;
670 }
671 
672 void ASTStmtWriter::VisitCharacterLiteral(CharacterLiteral *E) {
673   VisitExpr(E);
674   Record.push_back(E->getValue());
675   Record.AddSourceLocation(E->getLocation());
676   Record.push_back(E->getKind());
677 
678   AbbrevToUse = Writer.getCharacterLiteralAbbrev();
679 
680   Code = serialization::EXPR_CHARACTER_LITERAL;
681 }
682 
683 void ASTStmtWriter::VisitParenExpr(ParenExpr *E) {
684   VisitExpr(E);
685   Record.AddSourceLocation(E->getLParen());
686   Record.AddSourceLocation(E->getRParen());
687   Record.AddStmt(E->getSubExpr());
688   Code = serialization::EXPR_PAREN;
689 }
690 
691 void ASTStmtWriter::VisitParenListExpr(ParenListExpr *E) {
692   VisitExpr(E);
693   Record.push_back(E->getNumExprs());
694   for (auto *SubStmt : E->exprs())
695     Record.AddStmt(SubStmt);
696   Record.AddSourceLocation(E->getLParenLoc());
697   Record.AddSourceLocation(E->getRParenLoc());
698   Code = serialization::EXPR_PAREN_LIST;
699 }
700 
701 void ASTStmtWriter::VisitUnaryOperator(UnaryOperator *E) {
702   VisitExpr(E);
703   Record.AddStmt(E->getSubExpr());
704   Record.push_back(E->getOpcode()); // FIXME: stable encoding
705   Record.AddSourceLocation(E->getOperatorLoc());
706   Record.push_back(E->canOverflow());
707   Code = serialization::EXPR_UNARY_OPERATOR;
708 }
709 
710 void ASTStmtWriter::VisitOffsetOfExpr(OffsetOfExpr *E) {
711   VisitExpr(E);
712   Record.push_back(E->getNumComponents());
713   Record.push_back(E->getNumExpressions());
714   Record.AddSourceLocation(E->getOperatorLoc());
715   Record.AddSourceLocation(E->getRParenLoc());
716   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
717   for (unsigned I = 0, N = E->getNumComponents(); I != N; ++I) {
718     const OffsetOfNode &ON = E->getComponent(I);
719     Record.push_back(ON.getKind()); // FIXME: Stable encoding
720     Record.AddSourceLocation(ON.getSourceRange().getBegin());
721     Record.AddSourceLocation(ON.getSourceRange().getEnd());
722     switch (ON.getKind()) {
723     case OffsetOfNode::Array:
724       Record.push_back(ON.getArrayExprIndex());
725       break;
726 
727     case OffsetOfNode::Field:
728       Record.AddDeclRef(ON.getField());
729       break;
730 
731     case OffsetOfNode::Identifier:
732       Record.AddIdentifierRef(ON.getFieldName());
733       break;
734 
735     case OffsetOfNode::Base:
736       Record.AddCXXBaseSpecifier(*ON.getBase());
737       break;
738     }
739   }
740   for (unsigned I = 0, N = E->getNumExpressions(); I != N; ++I)
741     Record.AddStmt(E->getIndexExpr(I));
742   Code = serialization::EXPR_OFFSETOF;
743 }
744 
745 void ASTStmtWriter::VisitUnaryExprOrTypeTraitExpr(UnaryExprOrTypeTraitExpr *E) {
746   VisitExpr(E);
747   Record.push_back(E->getKind());
748   if (E->isArgumentType())
749     Record.AddTypeSourceInfo(E->getArgumentTypeInfo());
750   else {
751     Record.push_back(0);
752     Record.AddStmt(E->getArgumentExpr());
753   }
754   Record.AddSourceLocation(E->getOperatorLoc());
755   Record.AddSourceLocation(E->getRParenLoc());
756   Code = serialization::EXPR_SIZEOF_ALIGN_OF;
757 }
758 
759 void ASTStmtWriter::VisitArraySubscriptExpr(ArraySubscriptExpr *E) {
760   VisitExpr(E);
761   Record.AddStmt(E->getLHS());
762   Record.AddStmt(E->getRHS());
763   Record.AddSourceLocation(E->getRBracketLoc());
764   Code = serialization::EXPR_ARRAY_SUBSCRIPT;
765 }
766 
767 void ASTStmtWriter::VisitOMPArraySectionExpr(OMPArraySectionExpr *E) {
768   VisitExpr(E);
769   Record.AddStmt(E->getBase());
770   Record.AddStmt(E->getLowerBound());
771   Record.AddStmt(E->getLength());
772   Record.AddSourceLocation(E->getColonLoc());
773   Record.AddSourceLocation(E->getRBracketLoc());
774   Code = serialization::EXPR_OMP_ARRAY_SECTION;
775 }
776 
777 void ASTStmtWriter::VisitCallExpr(CallExpr *E) {
778   VisitExpr(E);
779   Record.push_back(E->getNumArgs());
780   Record.AddSourceLocation(E->getRParenLoc());
781   Record.AddStmt(E->getCallee());
782   for (CallExpr::arg_iterator Arg = E->arg_begin(), ArgEnd = E->arg_end();
783        Arg != ArgEnd; ++Arg)
784     Record.AddStmt(*Arg);
785   Record.push_back(static_cast<unsigned>(E->getADLCallKind()));
786   Code = serialization::EXPR_CALL;
787 }
788 
789 void ASTStmtWriter::VisitRecoveryExpr(RecoveryExpr *E) {
790   VisitExpr(E);
791   Record.push_back(std::distance(E->children().begin(), E->children().end()));
792   Record.AddSourceLocation(E->getBeginLoc());
793   Record.AddSourceLocation(E->getEndLoc());
794   for (Stmt *Child : E->children())
795     Record.AddStmt(Child);
796   Code = serialization::EXPR_RECOVERY;
797 }
798 
799 void ASTStmtWriter::VisitMemberExpr(MemberExpr *E) {
800   VisitExpr(E);
801 
802   bool HasQualifier = E->hasQualifier();
803   bool HasFoundDecl =
804       E->hasQualifierOrFoundDecl() &&
805       (E->getFoundDecl().getDecl() != E->getMemberDecl() ||
806        E->getFoundDecl().getAccess() != E->getMemberDecl()->getAccess());
807   bool HasTemplateInfo = E->hasTemplateKWAndArgsInfo();
808   unsigned NumTemplateArgs = E->getNumTemplateArgs();
809 
810   // Write these first for easy access when deserializing, as they affect the
811   // size of the MemberExpr.
812   Record.push_back(HasQualifier);
813   Record.push_back(HasFoundDecl);
814   Record.push_back(HasTemplateInfo);
815   Record.push_back(NumTemplateArgs);
816 
817   Record.AddStmt(E->getBase());
818   Record.AddDeclRef(E->getMemberDecl());
819   Record.AddDeclarationNameLoc(E->MemberDNLoc,
820                                E->getMemberDecl()->getDeclName());
821   Record.AddSourceLocation(E->getMemberLoc());
822   Record.push_back(E->isArrow());
823   Record.push_back(E->hadMultipleCandidates());
824   Record.push_back(E->isNonOdrUse());
825   Record.AddSourceLocation(E->getOperatorLoc());
826 
827   if (HasFoundDecl) {
828     DeclAccessPair FoundDecl = E->getFoundDecl();
829     Record.AddDeclRef(FoundDecl.getDecl());
830     Record.push_back(FoundDecl.getAccess());
831   }
832 
833   if (HasQualifier)
834     Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
835 
836   if (HasTemplateInfo)
837     AddTemplateKWAndArgsInfo(*E->getTrailingObjects<ASTTemplateKWAndArgsInfo>(),
838                              E->getTrailingObjects<TemplateArgumentLoc>());
839 
840   Code = serialization::EXPR_MEMBER;
841 }
842 
843 void ASTStmtWriter::VisitObjCIsaExpr(ObjCIsaExpr *E) {
844   VisitExpr(E);
845   Record.AddStmt(E->getBase());
846   Record.AddSourceLocation(E->getIsaMemberLoc());
847   Record.AddSourceLocation(E->getOpLoc());
848   Record.push_back(E->isArrow());
849   Code = serialization::EXPR_OBJC_ISA;
850 }
851 
852 void ASTStmtWriter::
853 VisitObjCIndirectCopyRestoreExpr(ObjCIndirectCopyRestoreExpr *E) {
854   VisitExpr(E);
855   Record.AddStmt(E->getSubExpr());
856   Record.push_back(E->shouldCopy());
857   Code = serialization::EXPR_OBJC_INDIRECT_COPY_RESTORE;
858 }
859 
860 void ASTStmtWriter::VisitObjCBridgedCastExpr(ObjCBridgedCastExpr *E) {
861   VisitExplicitCastExpr(E);
862   Record.AddSourceLocation(E->getLParenLoc());
863   Record.AddSourceLocation(E->getBridgeKeywordLoc());
864   Record.push_back(E->getBridgeKind()); // FIXME: Stable encoding
865   Code = serialization::EXPR_OBJC_BRIDGED_CAST;
866 }
867 
868 void ASTStmtWriter::VisitCastExpr(CastExpr *E) {
869   VisitExpr(E);
870   Record.push_back(E->path_size());
871   Record.AddStmt(E->getSubExpr());
872   Record.push_back(E->getCastKind()); // FIXME: stable encoding
873 
874   for (CastExpr::path_iterator
875          PI = E->path_begin(), PE = E->path_end(); PI != PE; ++PI)
876     Record.AddCXXBaseSpecifier(**PI);
877 }
878 
879 void ASTStmtWriter::VisitBinaryOperator(BinaryOperator *E) {
880   VisitExpr(E);
881   Record.AddStmt(E->getLHS());
882   Record.AddStmt(E->getRHS());
883   Record.push_back(E->getOpcode()); // FIXME: stable encoding
884   Record.AddSourceLocation(E->getOperatorLoc());
885   Record.push_back(E->getFPFeatures().getInt());
886   Code = serialization::EXPR_BINARY_OPERATOR;
887 }
888 
889 void ASTStmtWriter::VisitCompoundAssignOperator(CompoundAssignOperator *E) {
890   VisitBinaryOperator(E);
891   Record.AddTypeRef(E->getComputationLHSType());
892   Record.AddTypeRef(E->getComputationResultType());
893   Code = serialization::EXPR_COMPOUND_ASSIGN_OPERATOR;
894 }
895 
896 void ASTStmtWriter::VisitConditionalOperator(ConditionalOperator *E) {
897   VisitExpr(E);
898   Record.AddStmt(E->getCond());
899   Record.AddStmt(E->getLHS());
900   Record.AddStmt(E->getRHS());
901   Record.AddSourceLocation(E->getQuestionLoc());
902   Record.AddSourceLocation(E->getColonLoc());
903   Code = serialization::EXPR_CONDITIONAL_OPERATOR;
904 }
905 
906 void
907 ASTStmtWriter::VisitBinaryConditionalOperator(BinaryConditionalOperator *E) {
908   VisitExpr(E);
909   Record.AddStmt(E->getOpaqueValue());
910   Record.AddStmt(E->getCommon());
911   Record.AddStmt(E->getCond());
912   Record.AddStmt(E->getTrueExpr());
913   Record.AddStmt(E->getFalseExpr());
914   Record.AddSourceLocation(E->getQuestionLoc());
915   Record.AddSourceLocation(E->getColonLoc());
916   Code = serialization::EXPR_BINARY_CONDITIONAL_OPERATOR;
917 }
918 
919 void ASTStmtWriter::VisitImplicitCastExpr(ImplicitCastExpr *E) {
920   VisitCastExpr(E);
921   Record.push_back(E->isPartOfExplicitCast());
922 
923   if (E->path_size() == 0)
924     AbbrevToUse = Writer.getExprImplicitCastAbbrev();
925 
926   Code = serialization::EXPR_IMPLICIT_CAST;
927 }
928 
929 void ASTStmtWriter::VisitExplicitCastExpr(ExplicitCastExpr *E) {
930   VisitCastExpr(E);
931   Record.AddTypeSourceInfo(E->getTypeInfoAsWritten());
932 }
933 
934 void ASTStmtWriter::VisitCStyleCastExpr(CStyleCastExpr *E) {
935   VisitExplicitCastExpr(E);
936   Record.AddSourceLocation(E->getLParenLoc());
937   Record.AddSourceLocation(E->getRParenLoc());
938   Code = serialization::EXPR_CSTYLE_CAST;
939 }
940 
941 void ASTStmtWriter::VisitCompoundLiteralExpr(CompoundLiteralExpr *E) {
942   VisitExpr(E);
943   Record.AddSourceLocation(E->getLParenLoc());
944   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
945   Record.AddStmt(E->getInitializer());
946   Record.push_back(E->isFileScope());
947   Code = serialization::EXPR_COMPOUND_LITERAL;
948 }
949 
950 void ASTStmtWriter::VisitExtVectorElementExpr(ExtVectorElementExpr *E) {
951   VisitExpr(E);
952   Record.AddStmt(E->getBase());
953   Record.AddIdentifierRef(&E->getAccessor());
954   Record.AddSourceLocation(E->getAccessorLoc());
955   Code = serialization::EXPR_EXT_VECTOR_ELEMENT;
956 }
957 
958 void ASTStmtWriter::VisitInitListExpr(InitListExpr *E) {
959   VisitExpr(E);
960   // NOTE: only add the (possibly null) syntactic form.
961   // No need to serialize the isSemanticForm flag and the semantic form.
962   Record.AddStmt(E->getSyntacticForm());
963   Record.AddSourceLocation(E->getLBraceLoc());
964   Record.AddSourceLocation(E->getRBraceLoc());
965   bool isArrayFiller = E->ArrayFillerOrUnionFieldInit.is<Expr*>();
966   Record.push_back(isArrayFiller);
967   if (isArrayFiller)
968     Record.AddStmt(E->getArrayFiller());
969   else
970     Record.AddDeclRef(E->getInitializedFieldInUnion());
971   Record.push_back(E->hadArrayRangeDesignator());
972   Record.push_back(E->getNumInits());
973   if (isArrayFiller) {
974     // ArrayFiller may have filled "holes" due to designated initializer.
975     // Replace them by 0 to indicate that the filler goes in that place.
976     Expr *filler = E->getArrayFiller();
977     for (unsigned I = 0, N = E->getNumInits(); I != N; ++I)
978       Record.AddStmt(E->getInit(I) != filler ? E->getInit(I) : nullptr);
979   } else {
980     for (unsigned I = 0, N = E->getNumInits(); I != N; ++I)
981       Record.AddStmt(E->getInit(I));
982   }
983   Code = serialization::EXPR_INIT_LIST;
984 }
985 
986 void ASTStmtWriter::VisitDesignatedInitExpr(DesignatedInitExpr *E) {
987   VisitExpr(E);
988   Record.push_back(E->getNumSubExprs());
989   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
990     Record.AddStmt(E->getSubExpr(I));
991   Record.AddSourceLocation(E->getEqualOrColonLoc());
992   Record.push_back(E->usesGNUSyntax());
993   for (const DesignatedInitExpr::Designator &D : E->designators()) {
994     if (D.isFieldDesignator()) {
995       if (FieldDecl *Field = D.getField()) {
996         Record.push_back(serialization::DESIG_FIELD_DECL);
997         Record.AddDeclRef(Field);
998       } else {
999         Record.push_back(serialization::DESIG_FIELD_NAME);
1000         Record.AddIdentifierRef(D.getFieldName());
1001       }
1002       Record.AddSourceLocation(D.getDotLoc());
1003       Record.AddSourceLocation(D.getFieldLoc());
1004     } else if (D.isArrayDesignator()) {
1005       Record.push_back(serialization::DESIG_ARRAY);
1006       Record.push_back(D.getFirstExprIndex());
1007       Record.AddSourceLocation(D.getLBracketLoc());
1008       Record.AddSourceLocation(D.getRBracketLoc());
1009     } else {
1010       assert(D.isArrayRangeDesignator() && "Unknown designator");
1011       Record.push_back(serialization::DESIG_ARRAY_RANGE);
1012       Record.push_back(D.getFirstExprIndex());
1013       Record.AddSourceLocation(D.getLBracketLoc());
1014       Record.AddSourceLocation(D.getEllipsisLoc());
1015       Record.AddSourceLocation(D.getRBracketLoc());
1016     }
1017   }
1018   Code = serialization::EXPR_DESIGNATED_INIT;
1019 }
1020 
1021 void ASTStmtWriter::VisitDesignatedInitUpdateExpr(DesignatedInitUpdateExpr *E) {
1022   VisitExpr(E);
1023   Record.AddStmt(E->getBase());
1024   Record.AddStmt(E->getUpdater());
1025   Code = serialization::EXPR_DESIGNATED_INIT_UPDATE;
1026 }
1027 
1028 void ASTStmtWriter::VisitNoInitExpr(NoInitExpr *E) {
1029   VisitExpr(E);
1030   Code = serialization::EXPR_NO_INIT;
1031 }
1032 
1033 void ASTStmtWriter::VisitArrayInitLoopExpr(ArrayInitLoopExpr *E) {
1034   VisitExpr(E);
1035   Record.AddStmt(E->SubExprs[0]);
1036   Record.AddStmt(E->SubExprs[1]);
1037   Code = serialization::EXPR_ARRAY_INIT_LOOP;
1038 }
1039 
1040 void ASTStmtWriter::VisitArrayInitIndexExpr(ArrayInitIndexExpr *E) {
1041   VisitExpr(E);
1042   Code = serialization::EXPR_ARRAY_INIT_INDEX;
1043 }
1044 
1045 void ASTStmtWriter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) {
1046   VisitExpr(E);
1047   Code = serialization::EXPR_IMPLICIT_VALUE_INIT;
1048 }
1049 
1050 void ASTStmtWriter::VisitVAArgExpr(VAArgExpr *E) {
1051   VisitExpr(E);
1052   Record.AddStmt(E->getSubExpr());
1053   Record.AddTypeSourceInfo(E->getWrittenTypeInfo());
1054   Record.AddSourceLocation(E->getBuiltinLoc());
1055   Record.AddSourceLocation(E->getRParenLoc());
1056   Record.push_back(E->isMicrosoftABI());
1057   Code = serialization::EXPR_VA_ARG;
1058 }
1059 
1060 void ASTStmtWriter::VisitSourceLocExpr(SourceLocExpr *E) {
1061   VisitExpr(E);
1062   Record.AddDeclRef(cast_or_null<Decl>(E->getParentContext()));
1063   Record.AddSourceLocation(E->getBeginLoc());
1064   Record.AddSourceLocation(E->getEndLoc());
1065   Record.push_back(E->getIdentKind());
1066   Code = serialization::EXPR_SOURCE_LOC;
1067 }
1068 
1069 void ASTStmtWriter::VisitAddrLabelExpr(AddrLabelExpr *E) {
1070   VisitExpr(E);
1071   Record.AddSourceLocation(E->getAmpAmpLoc());
1072   Record.AddSourceLocation(E->getLabelLoc());
1073   Record.AddDeclRef(E->getLabel());
1074   Code = serialization::EXPR_ADDR_LABEL;
1075 }
1076 
1077 void ASTStmtWriter::VisitStmtExpr(StmtExpr *E) {
1078   VisitExpr(E);
1079   Record.AddStmt(E->getSubStmt());
1080   Record.AddSourceLocation(E->getLParenLoc());
1081   Record.AddSourceLocation(E->getRParenLoc());
1082   Record.push_back(E->getTemplateDepth());
1083   Code = serialization::EXPR_STMT;
1084 }
1085 
1086 void ASTStmtWriter::VisitChooseExpr(ChooseExpr *E) {
1087   VisitExpr(E);
1088   Record.AddStmt(E->getCond());
1089   Record.AddStmt(E->getLHS());
1090   Record.AddStmt(E->getRHS());
1091   Record.AddSourceLocation(E->getBuiltinLoc());
1092   Record.AddSourceLocation(E->getRParenLoc());
1093   Record.push_back(E->isConditionDependent() ? false : E->isConditionTrue());
1094   Code = serialization::EXPR_CHOOSE;
1095 }
1096 
1097 void ASTStmtWriter::VisitGNUNullExpr(GNUNullExpr *E) {
1098   VisitExpr(E);
1099   Record.AddSourceLocation(E->getTokenLocation());
1100   Code = serialization::EXPR_GNU_NULL;
1101 }
1102 
1103 void ASTStmtWriter::VisitShuffleVectorExpr(ShuffleVectorExpr *E) {
1104   VisitExpr(E);
1105   Record.push_back(E->getNumSubExprs());
1106   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
1107     Record.AddStmt(E->getExpr(I));
1108   Record.AddSourceLocation(E->getBuiltinLoc());
1109   Record.AddSourceLocation(E->getRParenLoc());
1110   Code = serialization::EXPR_SHUFFLE_VECTOR;
1111 }
1112 
1113 void ASTStmtWriter::VisitConvertVectorExpr(ConvertVectorExpr *E) {
1114   VisitExpr(E);
1115   Record.AddSourceLocation(E->getBuiltinLoc());
1116   Record.AddSourceLocation(E->getRParenLoc());
1117   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1118   Record.AddStmt(E->getSrcExpr());
1119   Code = serialization::EXPR_CONVERT_VECTOR;
1120 }
1121 
1122 void ASTStmtWriter::VisitBlockExpr(BlockExpr *E) {
1123   VisitExpr(E);
1124   Record.AddDeclRef(E->getBlockDecl());
1125   Code = serialization::EXPR_BLOCK;
1126 }
1127 
1128 void ASTStmtWriter::VisitGenericSelectionExpr(GenericSelectionExpr *E) {
1129   VisitExpr(E);
1130 
1131   Record.push_back(E->getNumAssocs());
1132   Record.push_back(E->ResultIndex);
1133   Record.AddSourceLocation(E->getGenericLoc());
1134   Record.AddSourceLocation(E->getDefaultLoc());
1135   Record.AddSourceLocation(E->getRParenLoc());
1136 
1137   Stmt **Stmts = E->getTrailingObjects<Stmt *>();
1138   // Add 1 to account for the controlling expression which is the first
1139   // expression in the trailing array of Stmt *. This is not needed for
1140   // the trailing array of TypeSourceInfo *.
1141   for (unsigned I = 0, N = E->getNumAssocs() + 1; I < N; ++I)
1142     Record.AddStmt(Stmts[I]);
1143 
1144   TypeSourceInfo **TSIs = E->getTrailingObjects<TypeSourceInfo *>();
1145   for (unsigned I = 0, N = E->getNumAssocs(); I < N; ++I)
1146     Record.AddTypeSourceInfo(TSIs[I]);
1147 
1148   Code = serialization::EXPR_GENERIC_SELECTION;
1149 }
1150 
1151 void ASTStmtWriter::VisitPseudoObjectExpr(PseudoObjectExpr *E) {
1152   VisitExpr(E);
1153   Record.push_back(E->getNumSemanticExprs());
1154 
1155   // Push the result index.  Currently, this needs to exactly match
1156   // the encoding used internally for ResultIndex.
1157   unsigned result = E->getResultExprIndex();
1158   result = (result == PseudoObjectExpr::NoResult ? 0 : result + 1);
1159   Record.push_back(result);
1160 
1161   Record.AddStmt(E->getSyntacticForm());
1162   for (PseudoObjectExpr::semantics_iterator
1163          i = E->semantics_begin(), e = E->semantics_end(); i != e; ++i) {
1164     Record.AddStmt(*i);
1165   }
1166   Code = serialization::EXPR_PSEUDO_OBJECT;
1167 }
1168 
1169 void ASTStmtWriter::VisitAtomicExpr(AtomicExpr *E) {
1170   VisitExpr(E);
1171   Record.push_back(E->getOp());
1172   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
1173     Record.AddStmt(E->getSubExprs()[I]);
1174   Record.AddSourceLocation(E->getBuiltinLoc());
1175   Record.AddSourceLocation(E->getRParenLoc());
1176   Code = serialization::EXPR_ATOMIC;
1177 }
1178 
1179 //===----------------------------------------------------------------------===//
1180 // Objective-C Expressions and Statements.
1181 //===----------------------------------------------------------------------===//
1182 
1183 void ASTStmtWriter::VisitObjCStringLiteral(ObjCStringLiteral *E) {
1184   VisitExpr(E);
1185   Record.AddStmt(E->getString());
1186   Record.AddSourceLocation(E->getAtLoc());
1187   Code = serialization::EXPR_OBJC_STRING_LITERAL;
1188 }
1189 
1190 void ASTStmtWriter::VisitObjCBoxedExpr(ObjCBoxedExpr *E) {
1191   VisitExpr(E);
1192   Record.AddStmt(E->getSubExpr());
1193   Record.AddDeclRef(E->getBoxingMethod());
1194   Record.AddSourceRange(E->getSourceRange());
1195   Code = serialization::EXPR_OBJC_BOXED_EXPRESSION;
1196 }
1197 
1198 void ASTStmtWriter::VisitObjCArrayLiteral(ObjCArrayLiteral *E) {
1199   VisitExpr(E);
1200   Record.push_back(E->getNumElements());
1201   for (unsigned i = 0; i < E->getNumElements(); i++)
1202     Record.AddStmt(E->getElement(i));
1203   Record.AddDeclRef(E->getArrayWithObjectsMethod());
1204   Record.AddSourceRange(E->getSourceRange());
1205   Code = serialization::EXPR_OBJC_ARRAY_LITERAL;
1206 }
1207 
1208 void ASTStmtWriter::VisitObjCDictionaryLiteral(ObjCDictionaryLiteral *E) {
1209   VisitExpr(E);
1210   Record.push_back(E->getNumElements());
1211   Record.push_back(E->HasPackExpansions);
1212   for (unsigned i = 0; i < E->getNumElements(); i++) {
1213     ObjCDictionaryElement Element = E->getKeyValueElement(i);
1214     Record.AddStmt(Element.Key);
1215     Record.AddStmt(Element.Value);
1216     if (E->HasPackExpansions) {
1217       Record.AddSourceLocation(Element.EllipsisLoc);
1218       unsigned NumExpansions = 0;
1219       if (Element.NumExpansions)
1220         NumExpansions = *Element.NumExpansions + 1;
1221       Record.push_back(NumExpansions);
1222     }
1223   }
1224 
1225   Record.AddDeclRef(E->getDictWithObjectsMethod());
1226   Record.AddSourceRange(E->getSourceRange());
1227   Code = serialization::EXPR_OBJC_DICTIONARY_LITERAL;
1228 }
1229 
1230 void ASTStmtWriter::VisitObjCEncodeExpr(ObjCEncodeExpr *E) {
1231   VisitExpr(E);
1232   Record.AddTypeSourceInfo(E->getEncodedTypeSourceInfo());
1233   Record.AddSourceLocation(E->getAtLoc());
1234   Record.AddSourceLocation(E->getRParenLoc());
1235   Code = serialization::EXPR_OBJC_ENCODE;
1236 }
1237 
1238 void ASTStmtWriter::VisitObjCSelectorExpr(ObjCSelectorExpr *E) {
1239   VisitExpr(E);
1240   Record.AddSelectorRef(E->getSelector());
1241   Record.AddSourceLocation(E->getAtLoc());
1242   Record.AddSourceLocation(E->getRParenLoc());
1243   Code = serialization::EXPR_OBJC_SELECTOR_EXPR;
1244 }
1245 
1246 void ASTStmtWriter::VisitObjCProtocolExpr(ObjCProtocolExpr *E) {
1247   VisitExpr(E);
1248   Record.AddDeclRef(E->getProtocol());
1249   Record.AddSourceLocation(E->getAtLoc());
1250   Record.AddSourceLocation(E->ProtoLoc);
1251   Record.AddSourceLocation(E->getRParenLoc());
1252   Code = serialization::EXPR_OBJC_PROTOCOL_EXPR;
1253 }
1254 
1255 void ASTStmtWriter::VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) {
1256   VisitExpr(E);
1257   Record.AddDeclRef(E->getDecl());
1258   Record.AddSourceLocation(E->getLocation());
1259   Record.AddSourceLocation(E->getOpLoc());
1260   Record.AddStmt(E->getBase());
1261   Record.push_back(E->isArrow());
1262   Record.push_back(E->isFreeIvar());
1263   Code = serialization::EXPR_OBJC_IVAR_REF_EXPR;
1264 }
1265 
1266 void ASTStmtWriter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) {
1267   VisitExpr(E);
1268   Record.push_back(E->SetterAndMethodRefFlags.getInt());
1269   Record.push_back(E->isImplicitProperty());
1270   if (E->isImplicitProperty()) {
1271     Record.AddDeclRef(E->getImplicitPropertyGetter());
1272     Record.AddDeclRef(E->getImplicitPropertySetter());
1273   } else {
1274     Record.AddDeclRef(E->getExplicitProperty());
1275   }
1276   Record.AddSourceLocation(E->getLocation());
1277   Record.AddSourceLocation(E->getReceiverLocation());
1278   if (E->isObjectReceiver()) {
1279     Record.push_back(0);
1280     Record.AddStmt(E->getBase());
1281   } else if (E->isSuperReceiver()) {
1282     Record.push_back(1);
1283     Record.AddTypeRef(E->getSuperReceiverType());
1284   } else {
1285     Record.push_back(2);
1286     Record.AddDeclRef(E->getClassReceiver());
1287   }
1288 
1289   Code = serialization::EXPR_OBJC_PROPERTY_REF_EXPR;
1290 }
1291 
1292 void ASTStmtWriter::VisitObjCSubscriptRefExpr(ObjCSubscriptRefExpr *E) {
1293   VisitExpr(E);
1294   Record.AddSourceLocation(E->getRBracket());
1295   Record.AddStmt(E->getBaseExpr());
1296   Record.AddStmt(E->getKeyExpr());
1297   Record.AddDeclRef(E->getAtIndexMethodDecl());
1298   Record.AddDeclRef(E->setAtIndexMethodDecl());
1299 
1300   Code = serialization::EXPR_OBJC_SUBSCRIPT_REF_EXPR;
1301 }
1302 
1303 void ASTStmtWriter::VisitObjCMessageExpr(ObjCMessageExpr *E) {
1304   VisitExpr(E);
1305   Record.push_back(E->getNumArgs());
1306   Record.push_back(E->getNumStoredSelLocs());
1307   Record.push_back(E->SelLocsKind);
1308   Record.push_back(E->isDelegateInitCall());
1309   Record.push_back(E->IsImplicit);
1310   Record.push_back((unsigned)E->getReceiverKind()); // FIXME: stable encoding
1311   switch (E->getReceiverKind()) {
1312   case ObjCMessageExpr::Instance:
1313     Record.AddStmt(E->getInstanceReceiver());
1314     break;
1315 
1316   case ObjCMessageExpr::Class:
1317     Record.AddTypeSourceInfo(E->getClassReceiverTypeInfo());
1318     break;
1319 
1320   case ObjCMessageExpr::SuperClass:
1321   case ObjCMessageExpr::SuperInstance:
1322     Record.AddTypeRef(E->getSuperType());
1323     Record.AddSourceLocation(E->getSuperLoc());
1324     break;
1325   }
1326 
1327   if (E->getMethodDecl()) {
1328     Record.push_back(1);
1329     Record.AddDeclRef(E->getMethodDecl());
1330   } else {
1331     Record.push_back(0);
1332     Record.AddSelectorRef(E->getSelector());
1333   }
1334 
1335   Record.AddSourceLocation(E->getLeftLoc());
1336   Record.AddSourceLocation(E->getRightLoc());
1337 
1338   for (CallExpr::arg_iterator Arg = E->arg_begin(), ArgEnd = E->arg_end();
1339        Arg != ArgEnd; ++Arg)
1340     Record.AddStmt(*Arg);
1341 
1342   SourceLocation *Locs = E->getStoredSelLocs();
1343   for (unsigned i = 0, e = E->getNumStoredSelLocs(); i != e; ++i)
1344     Record.AddSourceLocation(Locs[i]);
1345 
1346   Code = serialization::EXPR_OBJC_MESSAGE_EXPR;
1347 }
1348 
1349 void ASTStmtWriter::VisitObjCForCollectionStmt(ObjCForCollectionStmt *S) {
1350   VisitStmt(S);
1351   Record.AddStmt(S->getElement());
1352   Record.AddStmt(S->getCollection());
1353   Record.AddStmt(S->getBody());
1354   Record.AddSourceLocation(S->getForLoc());
1355   Record.AddSourceLocation(S->getRParenLoc());
1356   Code = serialization::STMT_OBJC_FOR_COLLECTION;
1357 }
1358 
1359 void ASTStmtWriter::VisitObjCAtCatchStmt(ObjCAtCatchStmt *S) {
1360   VisitStmt(S);
1361   Record.AddStmt(S->getCatchBody());
1362   Record.AddDeclRef(S->getCatchParamDecl());
1363   Record.AddSourceLocation(S->getAtCatchLoc());
1364   Record.AddSourceLocation(S->getRParenLoc());
1365   Code = serialization::STMT_OBJC_CATCH;
1366 }
1367 
1368 void ASTStmtWriter::VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *S) {
1369   VisitStmt(S);
1370   Record.AddStmt(S->getFinallyBody());
1371   Record.AddSourceLocation(S->getAtFinallyLoc());
1372   Code = serialization::STMT_OBJC_FINALLY;
1373 }
1374 
1375 void ASTStmtWriter::VisitObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S) {
1376   VisitStmt(S); // FIXME: no test coverage.
1377   Record.AddStmt(S->getSubStmt());
1378   Record.AddSourceLocation(S->getAtLoc());
1379   Code = serialization::STMT_OBJC_AUTORELEASE_POOL;
1380 }
1381 
1382 void ASTStmtWriter::VisitObjCAtTryStmt(ObjCAtTryStmt *S) {
1383   VisitStmt(S);
1384   Record.push_back(S->getNumCatchStmts());
1385   Record.push_back(S->getFinallyStmt() != nullptr);
1386   Record.AddStmt(S->getTryBody());
1387   for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; ++I)
1388     Record.AddStmt(S->getCatchStmt(I));
1389   if (S->getFinallyStmt())
1390     Record.AddStmt(S->getFinallyStmt());
1391   Record.AddSourceLocation(S->getAtTryLoc());
1392   Code = serialization::STMT_OBJC_AT_TRY;
1393 }
1394 
1395 void ASTStmtWriter::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
1396   VisitStmt(S); // FIXME: no test coverage.
1397   Record.AddStmt(S->getSynchExpr());
1398   Record.AddStmt(S->getSynchBody());
1399   Record.AddSourceLocation(S->getAtSynchronizedLoc());
1400   Code = serialization::STMT_OBJC_AT_SYNCHRONIZED;
1401 }
1402 
1403 void ASTStmtWriter::VisitObjCAtThrowStmt(ObjCAtThrowStmt *S) {
1404   VisitStmt(S); // FIXME: no test coverage.
1405   Record.AddStmt(S->getThrowExpr());
1406   Record.AddSourceLocation(S->getThrowLoc());
1407   Code = serialization::STMT_OBJC_AT_THROW;
1408 }
1409 
1410 void ASTStmtWriter::VisitObjCBoolLiteralExpr(ObjCBoolLiteralExpr *E) {
1411   VisitExpr(E);
1412   Record.push_back(E->getValue());
1413   Record.AddSourceLocation(E->getLocation());
1414   Code = serialization::EXPR_OBJC_BOOL_LITERAL;
1415 }
1416 
1417 void ASTStmtWriter::VisitObjCAvailabilityCheckExpr(ObjCAvailabilityCheckExpr *E) {
1418   VisitExpr(E);
1419   Record.AddSourceRange(E->getSourceRange());
1420   Record.AddVersionTuple(E->getVersion());
1421   Code = serialization::EXPR_OBJC_AVAILABILITY_CHECK;
1422 }
1423 
1424 //===----------------------------------------------------------------------===//
1425 // C++ Expressions and Statements.
1426 //===----------------------------------------------------------------------===//
1427 
1428 void ASTStmtWriter::VisitCXXCatchStmt(CXXCatchStmt *S) {
1429   VisitStmt(S);
1430   Record.AddSourceLocation(S->getCatchLoc());
1431   Record.AddDeclRef(S->getExceptionDecl());
1432   Record.AddStmt(S->getHandlerBlock());
1433   Code = serialization::STMT_CXX_CATCH;
1434 }
1435 
1436 void ASTStmtWriter::VisitCXXTryStmt(CXXTryStmt *S) {
1437   VisitStmt(S);
1438   Record.push_back(S->getNumHandlers());
1439   Record.AddSourceLocation(S->getTryLoc());
1440   Record.AddStmt(S->getTryBlock());
1441   for (unsigned i = 0, e = S->getNumHandlers(); i != e; ++i)
1442     Record.AddStmt(S->getHandler(i));
1443   Code = serialization::STMT_CXX_TRY;
1444 }
1445 
1446 void ASTStmtWriter::VisitCXXForRangeStmt(CXXForRangeStmt *S) {
1447   VisitStmt(S);
1448   Record.AddSourceLocation(S->getForLoc());
1449   Record.AddSourceLocation(S->getCoawaitLoc());
1450   Record.AddSourceLocation(S->getColonLoc());
1451   Record.AddSourceLocation(S->getRParenLoc());
1452   Record.AddStmt(S->getInit());
1453   Record.AddStmt(S->getRangeStmt());
1454   Record.AddStmt(S->getBeginStmt());
1455   Record.AddStmt(S->getEndStmt());
1456   Record.AddStmt(S->getCond());
1457   Record.AddStmt(S->getInc());
1458   Record.AddStmt(S->getLoopVarStmt());
1459   Record.AddStmt(S->getBody());
1460   Code = serialization::STMT_CXX_FOR_RANGE;
1461 }
1462 
1463 void ASTStmtWriter::VisitMSDependentExistsStmt(MSDependentExistsStmt *S) {
1464   VisitStmt(S);
1465   Record.AddSourceLocation(S->getKeywordLoc());
1466   Record.push_back(S->isIfExists());
1467   Record.AddNestedNameSpecifierLoc(S->getQualifierLoc());
1468   Record.AddDeclarationNameInfo(S->getNameInfo());
1469   Record.AddStmt(S->getSubStmt());
1470   Code = serialization::STMT_MS_DEPENDENT_EXISTS;
1471 }
1472 
1473 void ASTStmtWriter::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *E) {
1474   VisitCallExpr(E);
1475   Record.push_back(E->getOperator());
1476   Record.push_back(E->getFPFeatures().getInt());
1477   Record.AddSourceRange(E->Range);
1478   Code = serialization::EXPR_CXX_OPERATOR_CALL;
1479 }
1480 
1481 void ASTStmtWriter::VisitCXXMemberCallExpr(CXXMemberCallExpr *E) {
1482   VisitCallExpr(E);
1483   Code = serialization::EXPR_CXX_MEMBER_CALL;
1484 }
1485 
1486 void ASTStmtWriter::VisitCXXRewrittenBinaryOperator(
1487     CXXRewrittenBinaryOperator *E) {
1488   VisitExpr(E);
1489   Record.push_back(E->isReversed());
1490   Record.AddStmt(E->getSemanticForm());
1491   Code = serialization::EXPR_CXX_REWRITTEN_BINARY_OPERATOR;
1492 }
1493 
1494 void ASTStmtWriter::VisitCXXConstructExpr(CXXConstructExpr *E) {
1495   VisitExpr(E);
1496 
1497   Record.push_back(E->getNumArgs());
1498   Record.push_back(E->isElidable());
1499   Record.push_back(E->hadMultipleCandidates());
1500   Record.push_back(E->isListInitialization());
1501   Record.push_back(E->isStdInitListInitialization());
1502   Record.push_back(E->requiresZeroInitialization());
1503   Record.push_back(E->getConstructionKind()); // FIXME: stable encoding
1504   Record.AddSourceLocation(E->getLocation());
1505   Record.AddDeclRef(E->getConstructor());
1506   Record.AddSourceRange(E->getParenOrBraceRange());
1507 
1508   for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
1509     Record.AddStmt(E->getArg(I));
1510 
1511   Code = serialization::EXPR_CXX_CONSTRUCT;
1512 }
1513 
1514 void ASTStmtWriter::VisitCXXInheritedCtorInitExpr(CXXInheritedCtorInitExpr *E) {
1515   VisitExpr(E);
1516   Record.AddDeclRef(E->getConstructor());
1517   Record.AddSourceLocation(E->getLocation());
1518   Record.push_back(E->constructsVBase());
1519   Record.push_back(E->inheritedFromVBase());
1520   Code = serialization::EXPR_CXX_INHERITED_CTOR_INIT;
1521 }
1522 
1523 void ASTStmtWriter::VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *E) {
1524   VisitCXXConstructExpr(E);
1525   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1526   Code = serialization::EXPR_CXX_TEMPORARY_OBJECT;
1527 }
1528 
1529 void ASTStmtWriter::VisitLambdaExpr(LambdaExpr *E) {
1530   VisitExpr(E);
1531   Record.push_back(E->NumCaptures);
1532   Record.AddSourceRange(E->IntroducerRange);
1533   Record.push_back(E->CaptureDefault); // FIXME: stable encoding
1534   Record.AddSourceLocation(E->CaptureDefaultLoc);
1535   Record.push_back(E->ExplicitParams);
1536   Record.push_back(E->ExplicitResultType);
1537   Record.AddSourceLocation(E->ClosingBrace);
1538 
1539   // Add capture initializers.
1540   for (LambdaExpr::capture_init_iterator C = E->capture_init_begin(),
1541                                       CEnd = E->capture_init_end();
1542        C != CEnd; ++C) {
1543     Record.AddStmt(*C);
1544   }
1545 
1546   Code = serialization::EXPR_LAMBDA;
1547 }
1548 
1549 void ASTStmtWriter::VisitCXXStdInitializerListExpr(CXXStdInitializerListExpr *E) {
1550   VisitExpr(E);
1551   Record.AddStmt(E->getSubExpr());
1552   Code = serialization::EXPR_CXX_STD_INITIALIZER_LIST;
1553 }
1554 
1555 void ASTStmtWriter::VisitCXXNamedCastExpr(CXXNamedCastExpr *E) {
1556   VisitExplicitCastExpr(E);
1557   Record.AddSourceRange(SourceRange(E->getOperatorLoc(), E->getRParenLoc()));
1558   Record.AddSourceRange(E->getAngleBrackets());
1559 }
1560 
1561 void ASTStmtWriter::VisitCXXStaticCastExpr(CXXStaticCastExpr *E) {
1562   VisitCXXNamedCastExpr(E);
1563   Code = serialization::EXPR_CXX_STATIC_CAST;
1564 }
1565 
1566 void ASTStmtWriter::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *E) {
1567   VisitCXXNamedCastExpr(E);
1568   Code = serialization::EXPR_CXX_DYNAMIC_CAST;
1569 }
1570 
1571 void ASTStmtWriter::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *E) {
1572   VisitCXXNamedCastExpr(E);
1573   Code = serialization::EXPR_CXX_REINTERPRET_CAST;
1574 }
1575 
1576 void ASTStmtWriter::VisitCXXConstCastExpr(CXXConstCastExpr *E) {
1577   VisitCXXNamedCastExpr(E);
1578   Code = serialization::EXPR_CXX_CONST_CAST;
1579 }
1580 
1581 void ASTStmtWriter::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *E) {
1582   VisitExplicitCastExpr(E);
1583   Record.AddSourceLocation(E->getLParenLoc());
1584   Record.AddSourceLocation(E->getRParenLoc());
1585   Code = serialization::EXPR_CXX_FUNCTIONAL_CAST;
1586 }
1587 
1588 void ASTStmtWriter::VisitBuiltinBitCastExpr(BuiltinBitCastExpr *E) {
1589   VisitExplicitCastExpr(E);
1590   Record.AddSourceLocation(E->getBeginLoc());
1591   Record.AddSourceLocation(E->getEndLoc());
1592 }
1593 
1594 void ASTStmtWriter::VisitUserDefinedLiteral(UserDefinedLiteral *E) {
1595   VisitCallExpr(E);
1596   Record.AddSourceLocation(E->UDSuffixLoc);
1597   Code = serialization::EXPR_USER_DEFINED_LITERAL;
1598 }
1599 
1600 void ASTStmtWriter::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *E) {
1601   VisitExpr(E);
1602   Record.push_back(E->getValue());
1603   Record.AddSourceLocation(E->getLocation());
1604   Code = serialization::EXPR_CXX_BOOL_LITERAL;
1605 }
1606 
1607 void ASTStmtWriter::VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *E) {
1608   VisitExpr(E);
1609   Record.AddSourceLocation(E->getLocation());
1610   Code = serialization::EXPR_CXX_NULL_PTR_LITERAL;
1611 }
1612 
1613 void ASTStmtWriter::VisitCXXTypeidExpr(CXXTypeidExpr *E) {
1614   VisitExpr(E);
1615   Record.AddSourceRange(E->getSourceRange());
1616   if (E->isTypeOperand()) {
1617     Record.AddTypeSourceInfo(E->getTypeOperandSourceInfo());
1618     Code = serialization::EXPR_CXX_TYPEID_TYPE;
1619   } else {
1620     Record.AddStmt(E->getExprOperand());
1621     Code = serialization::EXPR_CXX_TYPEID_EXPR;
1622   }
1623 }
1624 
1625 void ASTStmtWriter::VisitCXXThisExpr(CXXThisExpr *E) {
1626   VisitExpr(E);
1627   Record.AddSourceLocation(E->getLocation());
1628   Record.push_back(E->isImplicit());
1629   Code = serialization::EXPR_CXX_THIS;
1630 }
1631 
1632 void ASTStmtWriter::VisitCXXThrowExpr(CXXThrowExpr *E) {
1633   VisitExpr(E);
1634   Record.AddSourceLocation(E->getThrowLoc());
1635   Record.AddStmt(E->getSubExpr());
1636   Record.push_back(E->isThrownVariableInScope());
1637   Code = serialization::EXPR_CXX_THROW;
1638 }
1639 
1640 void ASTStmtWriter::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *E) {
1641   VisitExpr(E);
1642   Record.AddDeclRef(E->getParam());
1643   Record.AddDeclRef(cast_or_null<Decl>(E->getUsedContext()));
1644   Record.AddSourceLocation(E->getUsedLocation());
1645   Code = serialization::EXPR_CXX_DEFAULT_ARG;
1646 }
1647 
1648 void ASTStmtWriter::VisitCXXDefaultInitExpr(CXXDefaultInitExpr *E) {
1649   VisitExpr(E);
1650   Record.AddDeclRef(E->getField());
1651   Record.AddDeclRef(cast_or_null<Decl>(E->getUsedContext()));
1652   Record.AddSourceLocation(E->getExprLoc());
1653   Code = serialization::EXPR_CXX_DEFAULT_INIT;
1654 }
1655 
1656 void ASTStmtWriter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) {
1657   VisitExpr(E);
1658   Record.AddCXXTemporary(E->getTemporary());
1659   Record.AddStmt(E->getSubExpr());
1660   Code = serialization::EXPR_CXX_BIND_TEMPORARY;
1661 }
1662 
1663 void ASTStmtWriter::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) {
1664   VisitExpr(E);
1665   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1666   Record.AddSourceLocation(E->getRParenLoc());
1667   Code = serialization::EXPR_CXX_SCALAR_VALUE_INIT;
1668 }
1669 
1670 void ASTStmtWriter::VisitCXXNewExpr(CXXNewExpr *E) {
1671   VisitExpr(E);
1672 
1673   Record.push_back(E->isArray());
1674   Record.push_back(E->hasInitializer());
1675   Record.push_back(E->getNumPlacementArgs());
1676   Record.push_back(E->isParenTypeId());
1677 
1678   Record.push_back(E->isGlobalNew());
1679   Record.push_back(E->passAlignment());
1680   Record.push_back(E->doesUsualArrayDeleteWantSize());
1681   Record.push_back(E->CXXNewExprBits.StoredInitializationStyle);
1682 
1683   Record.AddDeclRef(E->getOperatorNew());
1684   Record.AddDeclRef(E->getOperatorDelete());
1685   Record.AddTypeSourceInfo(E->getAllocatedTypeSourceInfo());
1686   if (E->isParenTypeId())
1687     Record.AddSourceRange(E->getTypeIdParens());
1688   Record.AddSourceRange(E->getSourceRange());
1689   Record.AddSourceRange(E->getDirectInitRange());
1690 
1691   for (CXXNewExpr::arg_iterator I = E->raw_arg_begin(), N = E->raw_arg_end();
1692        I != N; ++I)
1693     Record.AddStmt(*I);
1694 
1695   Code = serialization::EXPR_CXX_NEW;
1696 }
1697 
1698 void ASTStmtWriter::VisitCXXDeleteExpr(CXXDeleteExpr *E) {
1699   VisitExpr(E);
1700   Record.push_back(E->isGlobalDelete());
1701   Record.push_back(E->isArrayForm());
1702   Record.push_back(E->isArrayFormAsWritten());
1703   Record.push_back(E->doesUsualArrayDeleteWantSize());
1704   Record.AddDeclRef(E->getOperatorDelete());
1705   Record.AddStmt(E->getArgument());
1706   Record.AddSourceLocation(E->getBeginLoc());
1707 
1708   Code = serialization::EXPR_CXX_DELETE;
1709 }
1710 
1711 void ASTStmtWriter::VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E) {
1712   VisitExpr(E);
1713 
1714   Record.AddStmt(E->getBase());
1715   Record.push_back(E->isArrow());
1716   Record.AddSourceLocation(E->getOperatorLoc());
1717   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1718   Record.AddTypeSourceInfo(E->getScopeTypeInfo());
1719   Record.AddSourceLocation(E->getColonColonLoc());
1720   Record.AddSourceLocation(E->getTildeLoc());
1721 
1722   // PseudoDestructorTypeStorage.
1723   Record.AddIdentifierRef(E->getDestroyedTypeIdentifier());
1724   if (E->getDestroyedTypeIdentifier())
1725     Record.AddSourceLocation(E->getDestroyedTypeLoc());
1726   else
1727     Record.AddTypeSourceInfo(E->getDestroyedTypeInfo());
1728 
1729   Code = serialization::EXPR_CXX_PSEUDO_DESTRUCTOR;
1730 }
1731 
1732 void ASTStmtWriter::VisitExprWithCleanups(ExprWithCleanups *E) {
1733   VisitExpr(E);
1734   Record.push_back(E->getNumObjects());
1735   for (auto &Obj : E->getObjects()) {
1736     if (auto *BD = Obj.dyn_cast<BlockDecl *>()) {
1737       Record.push_back(serialization::COK_Block);
1738       Record.AddDeclRef(BD);
1739     } else if (auto *CLE = Obj.dyn_cast<CompoundLiteralExpr *>()) {
1740       Record.push_back(serialization::COK_CompoundLiteral);
1741       Record.AddStmt(CLE);
1742     }
1743   }
1744 
1745   Record.push_back(E->cleanupsHaveSideEffects());
1746   Record.AddStmt(E->getSubExpr());
1747   Code = serialization::EXPR_EXPR_WITH_CLEANUPS;
1748 }
1749 
1750 void ASTStmtWriter::VisitCXXDependentScopeMemberExpr(
1751     CXXDependentScopeMemberExpr *E) {
1752   VisitExpr(E);
1753 
1754   // Don't emit anything here (or if you do you will have to update
1755   // the corresponding deserialization function).
1756 
1757   Record.push_back(E->hasTemplateKWAndArgsInfo());
1758   Record.push_back(E->getNumTemplateArgs());
1759   Record.push_back(E->hasFirstQualifierFoundInScope());
1760 
1761   if (E->hasTemplateKWAndArgsInfo()) {
1762     const ASTTemplateKWAndArgsInfo &ArgInfo =
1763         *E->getTrailingObjects<ASTTemplateKWAndArgsInfo>();
1764     AddTemplateKWAndArgsInfo(ArgInfo,
1765                              E->getTrailingObjects<TemplateArgumentLoc>());
1766   }
1767 
1768   Record.push_back(E->isArrow());
1769   Record.AddSourceLocation(E->getOperatorLoc());
1770   Record.AddTypeRef(E->getBaseType());
1771   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1772   if (!E->isImplicitAccess())
1773     Record.AddStmt(E->getBase());
1774   else
1775     Record.AddStmt(nullptr);
1776 
1777   if (E->hasFirstQualifierFoundInScope())
1778     Record.AddDeclRef(E->getFirstQualifierFoundInScope());
1779 
1780   Record.AddDeclarationNameInfo(E->MemberNameInfo);
1781   Code = serialization::EXPR_CXX_DEPENDENT_SCOPE_MEMBER;
1782 }
1783 
1784 void
1785 ASTStmtWriter::VisitDependentScopeDeclRefExpr(DependentScopeDeclRefExpr *E) {
1786   VisitExpr(E);
1787 
1788   // Don't emit anything here, HasTemplateKWAndArgsInfo must be
1789   // emitted first.
1790 
1791   Record.push_back(E->DependentScopeDeclRefExprBits.HasTemplateKWAndArgsInfo);
1792   if (E->DependentScopeDeclRefExprBits.HasTemplateKWAndArgsInfo) {
1793     const ASTTemplateKWAndArgsInfo &ArgInfo =
1794         *E->getTrailingObjects<ASTTemplateKWAndArgsInfo>();
1795     Record.push_back(ArgInfo.NumTemplateArgs);
1796     AddTemplateKWAndArgsInfo(ArgInfo,
1797                              E->getTrailingObjects<TemplateArgumentLoc>());
1798   }
1799 
1800   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1801   Record.AddDeclarationNameInfo(E->NameInfo);
1802   Code = serialization::EXPR_CXX_DEPENDENT_SCOPE_DECL_REF;
1803 }
1804 
1805 void
1806 ASTStmtWriter::VisitCXXUnresolvedConstructExpr(CXXUnresolvedConstructExpr *E) {
1807   VisitExpr(E);
1808   Record.push_back(E->arg_size());
1809   for (CXXUnresolvedConstructExpr::arg_iterator
1810          ArgI = E->arg_begin(), ArgE = E->arg_end(); ArgI != ArgE; ++ArgI)
1811     Record.AddStmt(*ArgI);
1812   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1813   Record.AddSourceLocation(E->getLParenLoc());
1814   Record.AddSourceLocation(E->getRParenLoc());
1815   Code = serialization::EXPR_CXX_UNRESOLVED_CONSTRUCT;
1816 }
1817 
1818 void ASTStmtWriter::VisitOverloadExpr(OverloadExpr *E) {
1819   VisitExpr(E);
1820 
1821   Record.push_back(E->getNumDecls());
1822   Record.push_back(E->hasTemplateKWAndArgsInfo());
1823   if (E->hasTemplateKWAndArgsInfo()) {
1824     const ASTTemplateKWAndArgsInfo &ArgInfo =
1825         *E->getTrailingASTTemplateKWAndArgsInfo();
1826     Record.push_back(ArgInfo.NumTemplateArgs);
1827     AddTemplateKWAndArgsInfo(ArgInfo, E->getTrailingTemplateArgumentLoc());
1828   }
1829 
1830   for (OverloadExpr::decls_iterator OvI = E->decls_begin(),
1831                                     OvE = E->decls_end();
1832        OvI != OvE; ++OvI) {
1833     Record.AddDeclRef(OvI.getDecl());
1834     Record.push_back(OvI.getAccess());
1835   }
1836 
1837   Record.AddDeclarationNameInfo(E->getNameInfo());
1838   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1839 }
1840 
1841 void ASTStmtWriter::VisitUnresolvedMemberExpr(UnresolvedMemberExpr *E) {
1842   VisitOverloadExpr(E);
1843   Record.push_back(E->isArrow());
1844   Record.push_back(E->hasUnresolvedUsing());
1845   Record.AddStmt(!E->isImplicitAccess() ? E->getBase() : nullptr);
1846   Record.AddTypeRef(E->getBaseType());
1847   Record.AddSourceLocation(E->getOperatorLoc());
1848   Code = serialization::EXPR_CXX_UNRESOLVED_MEMBER;
1849 }
1850 
1851 void ASTStmtWriter::VisitUnresolvedLookupExpr(UnresolvedLookupExpr *E) {
1852   VisitOverloadExpr(E);
1853   Record.push_back(E->requiresADL());
1854   Record.push_back(E->isOverloaded());
1855   Record.AddDeclRef(E->getNamingClass());
1856   Code = serialization::EXPR_CXX_UNRESOLVED_LOOKUP;
1857 }
1858 
1859 void ASTStmtWriter::VisitTypeTraitExpr(TypeTraitExpr *E) {
1860   VisitExpr(E);
1861   Record.push_back(E->TypeTraitExprBits.NumArgs);
1862   Record.push_back(E->TypeTraitExprBits.Kind); // FIXME: Stable encoding
1863   Record.push_back(E->TypeTraitExprBits.Value);
1864   Record.AddSourceRange(E->getSourceRange());
1865   for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
1866     Record.AddTypeSourceInfo(E->getArg(I));
1867   Code = serialization::EXPR_TYPE_TRAIT;
1868 }
1869 
1870 void ASTStmtWriter::VisitArrayTypeTraitExpr(ArrayTypeTraitExpr *E) {
1871   VisitExpr(E);
1872   Record.push_back(E->getTrait());
1873   Record.push_back(E->getValue());
1874   Record.AddSourceRange(E->getSourceRange());
1875   Record.AddTypeSourceInfo(E->getQueriedTypeSourceInfo());
1876   Record.AddStmt(E->getDimensionExpression());
1877   Code = serialization::EXPR_ARRAY_TYPE_TRAIT;
1878 }
1879 
1880 void ASTStmtWriter::VisitExpressionTraitExpr(ExpressionTraitExpr *E) {
1881   VisitExpr(E);
1882   Record.push_back(E->getTrait());
1883   Record.push_back(E->getValue());
1884   Record.AddSourceRange(E->getSourceRange());
1885   Record.AddStmt(E->getQueriedExpression());
1886   Code = serialization::EXPR_CXX_EXPRESSION_TRAIT;
1887 }
1888 
1889 void ASTStmtWriter::VisitCXXNoexceptExpr(CXXNoexceptExpr *E) {
1890   VisitExpr(E);
1891   Record.push_back(E->getValue());
1892   Record.AddSourceRange(E->getSourceRange());
1893   Record.AddStmt(E->getOperand());
1894   Code = serialization::EXPR_CXX_NOEXCEPT;
1895 }
1896 
1897 void ASTStmtWriter::VisitPackExpansionExpr(PackExpansionExpr *E) {
1898   VisitExpr(E);
1899   Record.AddSourceLocation(E->getEllipsisLoc());
1900   Record.push_back(E->NumExpansions);
1901   Record.AddStmt(E->getPattern());
1902   Code = serialization::EXPR_PACK_EXPANSION;
1903 }
1904 
1905 void ASTStmtWriter::VisitSizeOfPackExpr(SizeOfPackExpr *E) {
1906   VisitExpr(E);
1907   Record.push_back(E->isPartiallySubstituted() ? E->getPartialArguments().size()
1908                                                : 0);
1909   Record.AddSourceLocation(E->OperatorLoc);
1910   Record.AddSourceLocation(E->PackLoc);
1911   Record.AddSourceLocation(E->RParenLoc);
1912   Record.AddDeclRef(E->Pack);
1913   if (E->isPartiallySubstituted()) {
1914     for (const auto &TA : E->getPartialArguments())
1915       Record.AddTemplateArgument(TA);
1916   } else if (!E->isValueDependent()) {
1917     Record.push_back(E->getPackLength());
1918   }
1919   Code = serialization::EXPR_SIZEOF_PACK;
1920 }
1921 
1922 void ASTStmtWriter::VisitSubstNonTypeTemplateParmExpr(
1923                                               SubstNonTypeTemplateParmExpr *E) {
1924   VisitExpr(E);
1925   Record.AddDeclRef(E->getParameter());
1926   Record.AddSourceLocation(E->getNameLoc());
1927   Record.AddStmt(E->getReplacement());
1928   Code = serialization::EXPR_SUBST_NON_TYPE_TEMPLATE_PARM;
1929 }
1930 
1931 void ASTStmtWriter::VisitSubstNonTypeTemplateParmPackExpr(
1932                                           SubstNonTypeTemplateParmPackExpr *E) {
1933   VisitExpr(E);
1934   Record.AddDeclRef(E->getParameterPack());
1935   Record.AddTemplateArgument(E->getArgumentPack());
1936   Record.AddSourceLocation(E->getParameterPackLocation());
1937   Code = serialization::EXPR_SUBST_NON_TYPE_TEMPLATE_PARM_PACK;
1938 }
1939 
1940 void ASTStmtWriter::VisitFunctionParmPackExpr(FunctionParmPackExpr *E) {
1941   VisitExpr(E);
1942   Record.push_back(E->getNumExpansions());
1943   Record.AddDeclRef(E->getParameterPack());
1944   Record.AddSourceLocation(E->getParameterPackLocation());
1945   for (FunctionParmPackExpr::iterator I = E->begin(), End = E->end();
1946        I != End; ++I)
1947     Record.AddDeclRef(*I);
1948   Code = serialization::EXPR_FUNCTION_PARM_PACK;
1949 }
1950 
1951 void ASTStmtWriter::VisitMaterializeTemporaryExpr(MaterializeTemporaryExpr *E) {
1952   VisitExpr(E);
1953   Record.push_back(static_cast<bool>(E->getLifetimeExtendedTemporaryDecl()));
1954   if (E->getLifetimeExtendedTemporaryDecl())
1955     Record.AddDeclRef(E->getLifetimeExtendedTemporaryDecl());
1956   else
1957     Record.AddStmt(E->getSubExpr());
1958   Code = serialization::EXPR_MATERIALIZE_TEMPORARY;
1959 }
1960 
1961 void ASTStmtWriter::VisitCXXFoldExpr(CXXFoldExpr *E) {
1962   VisitExpr(E);
1963   Record.AddSourceLocation(E->LParenLoc);
1964   Record.AddSourceLocation(E->EllipsisLoc);
1965   Record.AddSourceLocation(E->RParenLoc);
1966   Record.push_back(E->NumExpansions);
1967   Record.AddStmt(E->SubExprs[0]);
1968   Record.AddStmt(E->SubExprs[1]);
1969   Record.push_back(E->Opcode);
1970   Code = serialization::EXPR_CXX_FOLD;
1971 }
1972 
1973 void ASTStmtWriter::VisitOpaqueValueExpr(OpaqueValueExpr *E) {
1974   VisitExpr(E);
1975   Record.AddStmt(E->getSourceExpr());
1976   Record.AddSourceLocation(E->getLocation());
1977   Record.push_back(E->isUnique());
1978   Code = serialization::EXPR_OPAQUE_VALUE;
1979 }
1980 
1981 void ASTStmtWriter::VisitTypoExpr(TypoExpr *E) {
1982   VisitExpr(E);
1983   // TODO: Figure out sane writer behavior for a TypoExpr, if necessary
1984   llvm_unreachable("Cannot write TypoExpr nodes");
1985 }
1986 
1987 //===----------------------------------------------------------------------===//
1988 // CUDA Expressions and Statements.
1989 //===----------------------------------------------------------------------===//
1990 
1991 void ASTStmtWriter::VisitCUDAKernelCallExpr(CUDAKernelCallExpr *E) {
1992   VisitCallExpr(E);
1993   Record.AddStmt(E->getConfig());
1994   Code = serialization::EXPR_CUDA_KERNEL_CALL;
1995 }
1996 
1997 //===----------------------------------------------------------------------===//
1998 // OpenCL Expressions and Statements.
1999 //===----------------------------------------------------------------------===//
2000 void ASTStmtWriter::VisitAsTypeExpr(AsTypeExpr *E) {
2001   VisitExpr(E);
2002   Record.AddSourceLocation(E->getBuiltinLoc());
2003   Record.AddSourceLocation(E->getRParenLoc());
2004   Record.AddStmt(E->getSrcExpr());
2005   Code = serialization::EXPR_ASTYPE;
2006 }
2007 
2008 //===----------------------------------------------------------------------===//
2009 // Microsoft Expressions and Statements.
2010 //===----------------------------------------------------------------------===//
2011 void ASTStmtWriter::VisitMSPropertyRefExpr(MSPropertyRefExpr *E) {
2012   VisitExpr(E);
2013   Record.push_back(E->isArrow());
2014   Record.AddStmt(E->getBaseExpr());
2015   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
2016   Record.AddSourceLocation(E->getMemberLoc());
2017   Record.AddDeclRef(E->getPropertyDecl());
2018   Code = serialization::EXPR_CXX_PROPERTY_REF_EXPR;
2019 }
2020 
2021 void ASTStmtWriter::VisitMSPropertySubscriptExpr(MSPropertySubscriptExpr *E) {
2022   VisitExpr(E);
2023   Record.AddStmt(E->getBase());
2024   Record.AddStmt(E->getIdx());
2025   Record.AddSourceLocation(E->getRBracketLoc());
2026   Code = serialization::EXPR_CXX_PROPERTY_SUBSCRIPT_EXPR;
2027 }
2028 
2029 void ASTStmtWriter::VisitCXXUuidofExpr(CXXUuidofExpr *E) {
2030   VisitExpr(E);
2031   Record.AddSourceRange(E->getSourceRange());
2032   Record.AddString(E->getUuidStr());
2033   if (E->isTypeOperand()) {
2034     Record.AddTypeSourceInfo(E->getTypeOperandSourceInfo());
2035     Code = serialization::EXPR_CXX_UUIDOF_TYPE;
2036   } else {
2037     Record.AddStmt(E->getExprOperand());
2038     Code = serialization::EXPR_CXX_UUIDOF_EXPR;
2039   }
2040 }
2041 
2042 void ASTStmtWriter::VisitSEHExceptStmt(SEHExceptStmt *S) {
2043   VisitStmt(S);
2044   Record.AddSourceLocation(S->getExceptLoc());
2045   Record.AddStmt(S->getFilterExpr());
2046   Record.AddStmt(S->getBlock());
2047   Code = serialization::STMT_SEH_EXCEPT;
2048 }
2049 
2050 void ASTStmtWriter::VisitSEHFinallyStmt(SEHFinallyStmt *S) {
2051   VisitStmt(S);
2052   Record.AddSourceLocation(S->getFinallyLoc());
2053   Record.AddStmt(S->getBlock());
2054   Code = serialization::STMT_SEH_FINALLY;
2055 }
2056 
2057 void ASTStmtWriter::VisitSEHTryStmt(SEHTryStmt *S) {
2058   VisitStmt(S);
2059   Record.push_back(S->getIsCXXTry());
2060   Record.AddSourceLocation(S->getTryLoc());
2061   Record.AddStmt(S->getTryBlock());
2062   Record.AddStmt(S->getHandler());
2063   Code = serialization::STMT_SEH_TRY;
2064 }
2065 
2066 void ASTStmtWriter::VisitSEHLeaveStmt(SEHLeaveStmt *S) {
2067   VisitStmt(S);
2068   Record.AddSourceLocation(S->getLeaveLoc());
2069   Code = serialization::STMT_SEH_LEAVE;
2070 }
2071 
2072 //===----------------------------------------------------------------------===//
2073 // OpenMP Directives.
2074 //===----------------------------------------------------------------------===//
2075 void ASTStmtWriter::VisitOMPExecutableDirective(OMPExecutableDirective *E) {
2076   Record.AddSourceLocation(E->getBeginLoc());
2077   Record.AddSourceLocation(E->getEndLoc());
2078   for (unsigned i = 0; i < E->getNumClauses(); ++i) {
2079     Record.writeOMPClause(E->getClause(i));
2080   }
2081   if (E->hasAssociatedStmt())
2082     Record.AddStmt(E->getAssociatedStmt());
2083 }
2084 
2085 void ASTStmtWriter::VisitOMPLoopDirective(OMPLoopDirective *D) {
2086   VisitStmt(D);
2087   Record.push_back(D->getNumClauses());
2088   Record.push_back(D->getCollapsedNumber());
2089   VisitOMPExecutableDirective(D);
2090   Record.AddStmt(D->getIterationVariable());
2091   Record.AddStmt(D->getLastIteration());
2092   Record.AddStmt(D->getCalcLastIteration());
2093   Record.AddStmt(D->getPreCond());
2094   Record.AddStmt(D->getCond());
2095   Record.AddStmt(D->getInit());
2096   Record.AddStmt(D->getInc());
2097   Record.AddStmt(D->getPreInits());
2098   if (isOpenMPWorksharingDirective(D->getDirectiveKind()) ||
2099       isOpenMPTaskLoopDirective(D->getDirectiveKind()) ||
2100       isOpenMPDistributeDirective(D->getDirectiveKind())) {
2101     Record.AddStmt(D->getIsLastIterVariable());
2102     Record.AddStmt(D->getLowerBoundVariable());
2103     Record.AddStmt(D->getUpperBoundVariable());
2104     Record.AddStmt(D->getStrideVariable());
2105     Record.AddStmt(D->getEnsureUpperBound());
2106     Record.AddStmt(D->getNextLowerBound());
2107     Record.AddStmt(D->getNextUpperBound());
2108     Record.AddStmt(D->getNumIterations());
2109   }
2110   if (isOpenMPLoopBoundSharingDirective(D->getDirectiveKind())) {
2111     Record.AddStmt(D->getPrevLowerBoundVariable());
2112     Record.AddStmt(D->getPrevUpperBoundVariable());
2113     Record.AddStmt(D->getDistInc());
2114     Record.AddStmt(D->getPrevEnsureUpperBound());
2115     Record.AddStmt(D->getCombinedLowerBoundVariable());
2116     Record.AddStmt(D->getCombinedUpperBoundVariable());
2117     Record.AddStmt(D->getCombinedEnsureUpperBound());
2118     Record.AddStmt(D->getCombinedInit());
2119     Record.AddStmt(D->getCombinedCond());
2120     Record.AddStmt(D->getCombinedNextLowerBound());
2121     Record.AddStmt(D->getCombinedNextUpperBound());
2122     Record.AddStmt(D->getCombinedDistCond());
2123     Record.AddStmt(D->getCombinedParForInDistCond());
2124   }
2125   for (auto I : D->counters()) {
2126     Record.AddStmt(I);
2127   }
2128   for (auto I : D->private_counters()) {
2129     Record.AddStmt(I);
2130   }
2131   for (auto I : D->inits()) {
2132     Record.AddStmt(I);
2133   }
2134   for (auto I : D->updates()) {
2135     Record.AddStmt(I);
2136   }
2137   for (auto I : D->finals()) {
2138     Record.AddStmt(I);
2139   }
2140   for (Stmt *S : D->dependent_counters())
2141     Record.AddStmt(S);
2142   for (Stmt *S : D->dependent_inits())
2143     Record.AddStmt(S);
2144   for (Stmt *S : D->finals_conditions())
2145     Record.AddStmt(S);
2146 }
2147 
2148 void ASTStmtWriter::VisitOMPParallelDirective(OMPParallelDirective *D) {
2149   VisitStmt(D);
2150   Record.push_back(D->getNumClauses());
2151   VisitOMPExecutableDirective(D);
2152   Record.push_back(D->hasCancel() ? 1 : 0);
2153   Code = serialization::STMT_OMP_PARALLEL_DIRECTIVE;
2154 }
2155 
2156 void ASTStmtWriter::VisitOMPSimdDirective(OMPSimdDirective *D) {
2157   VisitOMPLoopDirective(D);
2158   Code = serialization::STMT_OMP_SIMD_DIRECTIVE;
2159 }
2160 
2161 void ASTStmtWriter::VisitOMPForDirective(OMPForDirective *D) {
2162   VisitOMPLoopDirective(D);
2163   Record.push_back(D->hasCancel() ? 1 : 0);
2164   Code = serialization::STMT_OMP_FOR_DIRECTIVE;
2165 }
2166 
2167 void ASTStmtWriter::VisitOMPForSimdDirective(OMPForSimdDirective *D) {
2168   VisitOMPLoopDirective(D);
2169   Code = serialization::STMT_OMP_FOR_SIMD_DIRECTIVE;
2170 }
2171 
2172 void ASTStmtWriter::VisitOMPSectionsDirective(OMPSectionsDirective *D) {
2173   VisitStmt(D);
2174   Record.push_back(D->getNumClauses());
2175   VisitOMPExecutableDirective(D);
2176   Record.push_back(D->hasCancel() ? 1 : 0);
2177   Code = serialization::STMT_OMP_SECTIONS_DIRECTIVE;
2178 }
2179 
2180 void ASTStmtWriter::VisitOMPSectionDirective(OMPSectionDirective *D) {
2181   VisitStmt(D);
2182   VisitOMPExecutableDirective(D);
2183   Record.push_back(D->hasCancel() ? 1 : 0);
2184   Code = serialization::STMT_OMP_SECTION_DIRECTIVE;
2185 }
2186 
2187 void ASTStmtWriter::VisitOMPSingleDirective(OMPSingleDirective *D) {
2188   VisitStmt(D);
2189   Record.push_back(D->getNumClauses());
2190   VisitOMPExecutableDirective(D);
2191   Code = serialization::STMT_OMP_SINGLE_DIRECTIVE;
2192 }
2193 
2194 void ASTStmtWriter::VisitOMPMasterDirective(OMPMasterDirective *D) {
2195   VisitStmt(D);
2196   VisitOMPExecutableDirective(D);
2197   Code = serialization::STMT_OMP_MASTER_DIRECTIVE;
2198 }
2199 
2200 void ASTStmtWriter::VisitOMPCriticalDirective(OMPCriticalDirective *D) {
2201   VisitStmt(D);
2202   Record.push_back(D->getNumClauses());
2203   VisitOMPExecutableDirective(D);
2204   Record.AddDeclarationNameInfo(D->getDirectiveName());
2205   Code = serialization::STMT_OMP_CRITICAL_DIRECTIVE;
2206 }
2207 
2208 void ASTStmtWriter::VisitOMPParallelForDirective(OMPParallelForDirective *D) {
2209   VisitOMPLoopDirective(D);
2210   Record.push_back(D->hasCancel() ? 1 : 0);
2211   Code = serialization::STMT_OMP_PARALLEL_FOR_DIRECTIVE;
2212 }
2213 
2214 void ASTStmtWriter::VisitOMPParallelForSimdDirective(
2215     OMPParallelForSimdDirective *D) {
2216   VisitOMPLoopDirective(D);
2217   Code = serialization::STMT_OMP_PARALLEL_FOR_SIMD_DIRECTIVE;
2218 }
2219 
2220 void ASTStmtWriter::VisitOMPParallelMasterDirective(
2221     OMPParallelMasterDirective *D) {
2222   VisitStmt(D);
2223   Record.push_back(D->getNumClauses());
2224   VisitOMPExecutableDirective(D);
2225   Code = serialization::STMT_OMP_PARALLEL_MASTER_DIRECTIVE;
2226 }
2227 
2228 void ASTStmtWriter::VisitOMPParallelSectionsDirective(
2229     OMPParallelSectionsDirective *D) {
2230   VisitStmt(D);
2231   Record.push_back(D->getNumClauses());
2232   VisitOMPExecutableDirective(D);
2233   Record.push_back(D->hasCancel() ? 1 : 0);
2234   Code = serialization::STMT_OMP_PARALLEL_SECTIONS_DIRECTIVE;
2235 }
2236 
2237 void ASTStmtWriter::VisitOMPTaskDirective(OMPTaskDirective *D) {
2238   VisitStmt(D);
2239   Record.push_back(D->getNumClauses());
2240   VisitOMPExecutableDirective(D);
2241   Record.push_back(D->hasCancel() ? 1 : 0);
2242   Code = serialization::STMT_OMP_TASK_DIRECTIVE;
2243 }
2244 
2245 void ASTStmtWriter::VisitOMPAtomicDirective(OMPAtomicDirective *D) {
2246   VisitStmt(D);
2247   Record.push_back(D->getNumClauses());
2248   VisitOMPExecutableDirective(D);
2249   Record.AddStmt(D->getX());
2250   Record.AddStmt(D->getV());
2251   Record.AddStmt(D->getExpr());
2252   Record.AddStmt(D->getUpdateExpr());
2253   Record.push_back(D->isXLHSInRHSPart() ? 1 : 0);
2254   Record.push_back(D->isPostfixUpdate() ? 1 : 0);
2255   Code = serialization::STMT_OMP_ATOMIC_DIRECTIVE;
2256 }
2257 
2258 void ASTStmtWriter::VisitOMPTargetDirective(OMPTargetDirective *D) {
2259   VisitStmt(D);
2260   Record.push_back(D->getNumClauses());
2261   VisitOMPExecutableDirective(D);
2262   Code = serialization::STMT_OMP_TARGET_DIRECTIVE;
2263 }
2264 
2265 void ASTStmtWriter::VisitOMPTargetDataDirective(OMPTargetDataDirective *D) {
2266   VisitStmt(D);
2267   Record.push_back(D->getNumClauses());
2268   VisitOMPExecutableDirective(D);
2269   Code = serialization::STMT_OMP_TARGET_DATA_DIRECTIVE;
2270 }
2271 
2272 void ASTStmtWriter::VisitOMPTargetEnterDataDirective(
2273     OMPTargetEnterDataDirective *D) {
2274   VisitStmt(D);
2275   Record.push_back(D->getNumClauses());
2276   VisitOMPExecutableDirective(D);
2277   Code = serialization::STMT_OMP_TARGET_ENTER_DATA_DIRECTIVE;
2278 }
2279 
2280 void ASTStmtWriter::VisitOMPTargetExitDataDirective(
2281     OMPTargetExitDataDirective *D) {
2282   VisitStmt(D);
2283   Record.push_back(D->getNumClauses());
2284   VisitOMPExecutableDirective(D);
2285   Code = serialization::STMT_OMP_TARGET_EXIT_DATA_DIRECTIVE;
2286 }
2287 
2288 void ASTStmtWriter::VisitOMPTargetParallelDirective(
2289     OMPTargetParallelDirective *D) {
2290   VisitStmt(D);
2291   Record.push_back(D->getNumClauses());
2292   VisitOMPExecutableDirective(D);
2293   Code = serialization::STMT_OMP_TARGET_PARALLEL_DIRECTIVE;
2294 }
2295 
2296 void ASTStmtWriter::VisitOMPTargetParallelForDirective(
2297     OMPTargetParallelForDirective *D) {
2298   VisitOMPLoopDirective(D);
2299   Record.push_back(D->hasCancel() ? 1 : 0);
2300   Code = serialization::STMT_OMP_TARGET_PARALLEL_FOR_DIRECTIVE;
2301 }
2302 
2303 void ASTStmtWriter::VisitOMPTaskyieldDirective(OMPTaskyieldDirective *D) {
2304   VisitStmt(D);
2305   VisitOMPExecutableDirective(D);
2306   Code = serialization::STMT_OMP_TASKYIELD_DIRECTIVE;
2307 }
2308 
2309 void ASTStmtWriter::VisitOMPBarrierDirective(OMPBarrierDirective *D) {
2310   VisitStmt(D);
2311   VisitOMPExecutableDirective(D);
2312   Code = serialization::STMT_OMP_BARRIER_DIRECTIVE;
2313 }
2314 
2315 void ASTStmtWriter::VisitOMPTaskwaitDirective(OMPTaskwaitDirective *D) {
2316   VisitStmt(D);
2317   VisitOMPExecutableDirective(D);
2318   Code = serialization::STMT_OMP_TASKWAIT_DIRECTIVE;
2319 }
2320 
2321 void ASTStmtWriter::VisitOMPTaskgroupDirective(OMPTaskgroupDirective *D) {
2322   VisitStmt(D);
2323   Record.push_back(D->getNumClauses());
2324   VisitOMPExecutableDirective(D);
2325   Record.AddStmt(D->getReductionRef());
2326   Code = serialization::STMT_OMP_TASKGROUP_DIRECTIVE;
2327 }
2328 
2329 void ASTStmtWriter::VisitOMPFlushDirective(OMPFlushDirective *D) {
2330   VisitStmt(D);
2331   Record.push_back(D->getNumClauses());
2332   VisitOMPExecutableDirective(D);
2333   Code = serialization::STMT_OMP_FLUSH_DIRECTIVE;
2334 }
2335 
2336 void ASTStmtWriter::VisitOMPDepobjDirective(OMPDepobjDirective *D) {
2337   VisitStmt(D);
2338   Record.push_back(D->getNumClauses());
2339   VisitOMPExecutableDirective(D);
2340   Code = serialization::STMT_OMP_DEPOBJ_DIRECTIVE;
2341 }
2342 
2343 void ASTStmtWriter::VisitOMPScanDirective(OMPScanDirective *D) {
2344   VisitStmt(D);
2345   Record.push_back(D->getNumClauses());
2346   VisitOMPExecutableDirective(D);
2347   Code = serialization::STMT_OMP_SCAN_DIRECTIVE;
2348 }
2349 
2350 void ASTStmtWriter::VisitOMPOrderedDirective(OMPOrderedDirective *D) {
2351   VisitStmt(D);
2352   Record.push_back(D->getNumClauses());
2353   VisitOMPExecutableDirective(D);
2354   Code = serialization::STMT_OMP_ORDERED_DIRECTIVE;
2355 }
2356 
2357 void ASTStmtWriter::VisitOMPTeamsDirective(OMPTeamsDirective *D) {
2358   VisitStmt(D);
2359   Record.push_back(D->getNumClauses());
2360   VisitOMPExecutableDirective(D);
2361   Code = serialization::STMT_OMP_TEAMS_DIRECTIVE;
2362 }
2363 
2364 void ASTStmtWriter::VisitOMPCancellationPointDirective(
2365     OMPCancellationPointDirective *D) {
2366   VisitStmt(D);
2367   VisitOMPExecutableDirective(D);
2368   Record.push_back(uint64_t(D->getCancelRegion()));
2369   Code = serialization::STMT_OMP_CANCELLATION_POINT_DIRECTIVE;
2370 }
2371 
2372 void ASTStmtWriter::VisitOMPCancelDirective(OMPCancelDirective *D) {
2373   VisitStmt(D);
2374   Record.push_back(D->getNumClauses());
2375   VisitOMPExecutableDirective(D);
2376   Record.push_back(uint64_t(D->getCancelRegion()));
2377   Code = serialization::STMT_OMP_CANCEL_DIRECTIVE;
2378 }
2379 
2380 void ASTStmtWriter::VisitOMPTaskLoopDirective(OMPTaskLoopDirective *D) {
2381   VisitOMPLoopDirective(D);
2382   Record.push_back(D->hasCancel() ? 1 : 0);
2383   Code = serialization::STMT_OMP_TASKLOOP_DIRECTIVE;
2384 }
2385 
2386 void ASTStmtWriter::VisitOMPTaskLoopSimdDirective(OMPTaskLoopSimdDirective *D) {
2387   VisitOMPLoopDirective(D);
2388   Code = serialization::STMT_OMP_TASKLOOP_SIMD_DIRECTIVE;
2389 }
2390 
2391 void ASTStmtWriter::VisitOMPMasterTaskLoopDirective(
2392     OMPMasterTaskLoopDirective *D) {
2393   VisitOMPLoopDirective(D);
2394   Record.push_back(D->hasCancel() ? 1 : 0);
2395   Code = serialization::STMT_OMP_MASTER_TASKLOOP_DIRECTIVE;
2396 }
2397 
2398 void ASTStmtWriter::VisitOMPMasterTaskLoopSimdDirective(
2399     OMPMasterTaskLoopSimdDirective *D) {
2400   VisitOMPLoopDirective(D);
2401   Code = serialization::STMT_OMP_MASTER_TASKLOOP_SIMD_DIRECTIVE;
2402 }
2403 
2404 void ASTStmtWriter::VisitOMPParallelMasterTaskLoopDirective(
2405     OMPParallelMasterTaskLoopDirective *D) {
2406   VisitOMPLoopDirective(D);
2407   Record.push_back(D->hasCancel() ? 1 : 0);
2408   Code = serialization::STMT_OMP_PARALLEL_MASTER_TASKLOOP_DIRECTIVE;
2409 }
2410 
2411 void ASTStmtWriter::VisitOMPParallelMasterTaskLoopSimdDirective(
2412     OMPParallelMasterTaskLoopSimdDirective *D) {
2413   VisitOMPLoopDirective(D);
2414   Code = serialization::STMT_OMP_PARALLEL_MASTER_TASKLOOP_SIMD_DIRECTIVE;
2415 }
2416 
2417 void ASTStmtWriter::VisitOMPDistributeDirective(OMPDistributeDirective *D) {
2418   VisitOMPLoopDirective(D);
2419   Code = serialization::STMT_OMP_DISTRIBUTE_DIRECTIVE;
2420 }
2421 
2422 void ASTStmtWriter::VisitOMPTargetUpdateDirective(OMPTargetUpdateDirective *D) {
2423   VisitStmt(D);
2424   Record.push_back(D->getNumClauses());
2425   VisitOMPExecutableDirective(D);
2426   Code = serialization::STMT_OMP_TARGET_UPDATE_DIRECTIVE;
2427 }
2428 
2429 void ASTStmtWriter::VisitOMPDistributeParallelForDirective(
2430     OMPDistributeParallelForDirective *D) {
2431   VisitOMPLoopDirective(D);
2432   Record.push_back(D->hasCancel() ? 1 : 0);
2433   Code = serialization::STMT_OMP_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE;
2434 }
2435 
2436 void ASTStmtWriter::VisitOMPDistributeParallelForSimdDirective(
2437     OMPDistributeParallelForSimdDirective *D) {
2438   VisitOMPLoopDirective(D);
2439   Code = serialization::STMT_OMP_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE;
2440 }
2441 
2442 void ASTStmtWriter::VisitOMPDistributeSimdDirective(
2443     OMPDistributeSimdDirective *D) {
2444   VisitOMPLoopDirective(D);
2445   Code = serialization::STMT_OMP_DISTRIBUTE_SIMD_DIRECTIVE;
2446 }
2447 
2448 void ASTStmtWriter::VisitOMPTargetParallelForSimdDirective(
2449     OMPTargetParallelForSimdDirective *D) {
2450   VisitOMPLoopDirective(D);
2451   Code = serialization::STMT_OMP_TARGET_PARALLEL_FOR_SIMD_DIRECTIVE;
2452 }
2453 
2454 void ASTStmtWriter::VisitOMPTargetSimdDirective(OMPTargetSimdDirective *D) {
2455   VisitOMPLoopDirective(D);
2456   Code = serialization::STMT_OMP_TARGET_SIMD_DIRECTIVE;
2457 }
2458 
2459 void ASTStmtWriter::VisitOMPTeamsDistributeDirective(
2460     OMPTeamsDistributeDirective *D) {
2461   VisitOMPLoopDirective(D);
2462   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_DIRECTIVE;
2463 }
2464 
2465 void ASTStmtWriter::VisitOMPTeamsDistributeSimdDirective(
2466     OMPTeamsDistributeSimdDirective *D) {
2467   VisitOMPLoopDirective(D);
2468   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_SIMD_DIRECTIVE;
2469 }
2470 
2471 void ASTStmtWriter::VisitOMPTeamsDistributeParallelForSimdDirective(
2472     OMPTeamsDistributeParallelForSimdDirective *D) {
2473   VisitOMPLoopDirective(D);
2474   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE;
2475 }
2476 
2477 void ASTStmtWriter::VisitOMPTeamsDistributeParallelForDirective(
2478     OMPTeamsDistributeParallelForDirective *D) {
2479   VisitOMPLoopDirective(D);
2480   Record.push_back(D->hasCancel() ? 1 : 0);
2481   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE;
2482 }
2483 
2484 void ASTStmtWriter::VisitOMPTargetTeamsDirective(OMPTargetTeamsDirective *D) {
2485   VisitStmt(D);
2486   Record.push_back(D->getNumClauses());
2487   VisitOMPExecutableDirective(D);
2488   Code = serialization::STMT_OMP_TARGET_TEAMS_DIRECTIVE;
2489 }
2490 
2491 void ASTStmtWriter::VisitOMPTargetTeamsDistributeDirective(
2492     OMPTargetTeamsDistributeDirective *D) {
2493   VisitOMPLoopDirective(D);
2494   Code = serialization::STMT_OMP_TARGET_TEAMS_DISTRIBUTE_DIRECTIVE;
2495 }
2496 
2497 void ASTStmtWriter::VisitOMPTargetTeamsDistributeParallelForDirective(
2498     OMPTargetTeamsDistributeParallelForDirective *D) {
2499   VisitOMPLoopDirective(D);
2500   Record.push_back(D->hasCancel() ? 1 : 0);
2501   Code = serialization::STMT_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE;
2502 }
2503 
2504 void ASTStmtWriter::VisitOMPTargetTeamsDistributeParallelForSimdDirective(
2505     OMPTargetTeamsDistributeParallelForSimdDirective *D) {
2506   VisitOMPLoopDirective(D);
2507   Code = serialization::
2508       STMT_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE;
2509 }
2510 
2511 void ASTStmtWriter::VisitOMPTargetTeamsDistributeSimdDirective(
2512     OMPTargetTeamsDistributeSimdDirective *D) {
2513   VisitOMPLoopDirective(D);
2514   Code = serialization::STMT_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD_DIRECTIVE;
2515 }
2516 
2517 //===----------------------------------------------------------------------===//
2518 // ASTWriter Implementation
2519 //===----------------------------------------------------------------------===//
2520 
2521 unsigned ASTWriter::RecordSwitchCaseID(SwitchCase *S) {
2522   assert(SwitchCaseIDs.find(S) == SwitchCaseIDs.end() &&
2523          "SwitchCase recorded twice");
2524   unsigned NextID = SwitchCaseIDs.size();
2525   SwitchCaseIDs[S] = NextID;
2526   return NextID;
2527 }
2528 
2529 unsigned ASTWriter::getSwitchCaseID(SwitchCase *S) {
2530   assert(SwitchCaseIDs.find(S) != SwitchCaseIDs.end() &&
2531          "SwitchCase hasn't been seen yet");
2532   return SwitchCaseIDs[S];
2533 }
2534 
2535 void ASTWriter::ClearSwitchCaseIDs() {
2536   SwitchCaseIDs.clear();
2537 }
2538 
2539 /// Write the given substatement or subexpression to the
2540 /// bitstream.
2541 void ASTWriter::WriteSubStmt(Stmt *S) {
2542   RecordData Record;
2543   ASTStmtWriter Writer(*this, Record);
2544   ++NumStatements;
2545 
2546   if (!S) {
2547     Stream.EmitRecord(serialization::STMT_NULL_PTR, Record);
2548     return;
2549   }
2550 
2551   llvm::DenseMap<Stmt *, uint64_t>::iterator I = SubStmtEntries.find(S);
2552   if (I != SubStmtEntries.end()) {
2553     Record.push_back(I->second);
2554     Stream.EmitRecord(serialization::STMT_REF_PTR, Record);
2555     return;
2556   }
2557 
2558 #ifndef NDEBUG
2559   assert(!ParentStmts.count(S) && "There is a Stmt cycle!");
2560 
2561   struct ParentStmtInserterRAII {
2562     Stmt *S;
2563     llvm::DenseSet<Stmt *> &ParentStmts;
2564 
2565     ParentStmtInserterRAII(Stmt *S, llvm::DenseSet<Stmt *> &ParentStmts)
2566       : S(S), ParentStmts(ParentStmts) {
2567       ParentStmts.insert(S);
2568     }
2569     ~ParentStmtInserterRAII() {
2570       ParentStmts.erase(S);
2571     }
2572   };
2573 
2574   ParentStmtInserterRAII ParentStmtInserter(S, ParentStmts);
2575 #endif
2576 
2577   Writer.Visit(S);
2578 
2579   uint64_t Offset = Writer.Emit();
2580   SubStmtEntries[S] = Offset;
2581 }
2582 
2583 /// Flush all of the statements that have been added to the
2584 /// queue via AddStmt().
2585 void ASTRecordWriter::FlushStmts() {
2586   // We expect to be the only consumer of the two temporary statement maps,
2587   // assert that they are empty.
2588   assert(Writer->SubStmtEntries.empty() && "unexpected entries in sub-stmt map");
2589   assert(Writer->ParentStmts.empty() && "unexpected entries in parent stmt map");
2590 
2591   for (unsigned I = 0, N = StmtsToEmit.size(); I != N; ++I) {
2592     Writer->WriteSubStmt(StmtsToEmit[I]);
2593 
2594     assert(N == StmtsToEmit.size() && "record modified while being written!");
2595 
2596     // Note that we are at the end of a full expression. Any
2597     // expression records that follow this one are part of a different
2598     // expression.
2599     Writer->Stream.EmitRecord(serialization::STMT_STOP, ArrayRef<uint32_t>());
2600 
2601     Writer->SubStmtEntries.clear();
2602     Writer->ParentStmts.clear();
2603   }
2604 
2605   StmtsToEmit.clear();
2606 }
2607 
2608 void ASTRecordWriter::FlushSubStmts() {
2609   // For a nested statement, write out the substatements in reverse order (so
2610   // that a simple stack machine can be used when loading), and don't emit a
2611   // STMT_STOP after each one.
2612   for (unsigned I = 0, N = StmtsToEmit.size(); I != N; ++I) {
2613     Writer->WriteSubStmt(StmtsToEmit[N - I - 1]);
2614     assert(N == StmtsToEmit.size() && "record modified while being written!");
2615   }
2616 
2617   StmtsToEmit.clear();
2618 }
2619