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/AST/ExprOpenMP.h"
15 #include "clang/Serialization/ASTRecordWriter.h"
16 #include "clang/Sema/DeclSpec.h"
17 #include "clang/AST/ASTContext.h"
18 #include "clang/AST/DeclCXX.h"
19 #include "clang/AST/DeclObjC.h"
20 #include "clang/AST/DeclTemplate.h"
21 #include "clang/AST/StmtVisitor.h"
22 #include "clang/Lex/Token.h"
23 #include "llvm/Bitstream/BitstreamWriter.h"
24 using namespace clang;
25 
26 //===----------------------------------------------------------------------===//
27 // Statement/expression serialization
28 //===----------------------------------------------------------------------===//
29 
30 namespace clang {
31 
32   class ASTStmtWriter : public StmtVisitor<ASTStmtWriter, void> {
33     ASTWriter &Writer;
34     ASTRecordWriter Record;
35 
36     serialization::StmtCode Code;
37     unsigned AbbrevToUse;
38 
39   public:
40     ASTStmtWriter(ASTWriter &Writer, ASTWriter::RecordData &Record)
41         : Writer(Writer), Record(Writer, Record),
42           Code(serialization::STMT_NULL_PTR), AbbrevToUse(0) {}
43 
44     ASTStmtWriter(const ASTStmtWriter&) = delete;
45 
46     uint64_t Emit() {
47       assert(Code != serialization::STMT_NULL_PTR &&
48              "unhandled sub-statement writing AST file");
49       return Record.EmitStmt(Code, AbbrevToUse);
50     }
51 
52     void AddTemplateKWAndArgsInfo(const ASTTemplateKWAndArgsInfo &ArgInfo,
53                                   const TemplateArgumentLoc *Args);
54 
55     void VisitStmt(Stmt *S);
56 #define STMT(Type, Base) \
57     void Visit##Type(Type *);
58 #include "clang/AST/StmtNodes.inc"
59   };
60 }
61 
62 void ASTStmtWriter::AddTemplateKWAndArgsInfo(
63     const ASTTemplateKWAndArgsInfo &ArgInfo, const TemplateArgumentLoc *Args) {
64   Record.AddSourceLocation(ArgInfo.TemplateKWLoc);
65   Record.AddSourceLocation(ArgInfo.LAngleLoc);
66   Record.AddSourceLocation(ArgInfo.RAngleLoc);
67   for (unsigned i = 0; i != ArgInfo.NumTemplateArgs; ++i)
68     Record.AddTemplateArgumentLoc(Args[i]);
69 }
70 
71 void ASTStmtWriter::VisitStmt(Stmt *S) {
72 }
73 
74 void ASTStmtWriter::VisitNullStmt(NullStmt *S) {
75   VisitStmt(S);
76   Record.AddSourceLocation(S->getSemiLoc());
77   Record.push_back(S->NullStmtBits.HasLeadingEmptyMacro);
78   Code = serialization::STMT_NULL;
79 }
80 
81 void ASTStmtWriter::VisitCompoundStmt(CompoundStmt *S) {
82   VisitStmt(S);
83   Record.push_back(S->size());
84   for (auto *CS : S->body())
85     Record.AddStmt(CS);
86   Record.AddSourceLocation(S->getLBracLoc());
87   Record.AddSourceLocation(S->getRBracLoc());
88   Code = serialization::STMT_COMPOUND;
89 }
90 
91 void ASTStmtWriter::VisitSwitchCase(SwitchCase *S) {
92   VisitStmt(S);
93   Record.push_back(Writer.getSwitchCaseID(S));
94   Record.AddSourceLocation(S->getKeywordLoc());
95   Record.AddSourceLocation(S->getColonLoc());
96 }
97 
98 void ASTStmtWriter::VisitCaseStmt(CaseStmt *S) {
99   VisitSwitchCase(S);
100   Record.push_back(S->caseStmtIsGNURange());
101   Record.AddStmt(S->getLHS());
102   Record.AddStmt(S->getSubStmt());
103   if (S->caseStmtIsGNURange()) {
104     Record.AddStmt(S->getRHS());
105     Record.AddSourceLocation(S->getEllipsisLoc());
106   }
107   Code = serialization::STMT_CASE;
108 }
109 
110 void ASTStmtWriter::VisitDefaultStmt(DefaultStmt *S) {
111   VisitSwitchCase(S);
112   Record.AddStmt(S->getSubStmt());
113   Code = serialization::STMT_DEFAULT;
114 }
115 
116 void ASTStmtWriter::VisitLabelStmt(LabelStmt *S) {
117   VisitStmt(S);
118   Record.AddDeclRef(S->getDecl());
119   Record.AddStmt(S->getSubStmt());
120   Record.AddSourceLocation(S->getIdentLoc());
121   Code = serialization::STMT_LABEL;
122 }
123 
124 void ASTStmtWriter::VisitAttributedStmt(AttributedStmt *S) {
125   VisitStmt(S);
126   Record.push_back(S->getAttrs().size());
127   Record.AddAttributes(S->getAttrs());
128   Record.AddStmt(S->getSubStmt());
129   Record.AddSourceLocation(S->getAttrLoc());
130   Code = serialization::STMT_ATTRIBUTED;
131 }
132 
133 void ASTStmtWriter::VisitIfStmt(IfStmt *S) {
134   VisitStmt(S);
135 
136   bool HasElse = S->getElse() != nullptr;
137   bool HasVar = S->getConditionVariableDeclStmt() != nullptr;
138   bool HasInit = S->getInit() != nullptr;
139 
140   Record.push_back(S->isConstexpr());
141   Record.push_back(HasElse);
142   Record.push_back(HasVar);
143   Record.push_back(HasInit);
144 
145   Record.AddStmt(S->getCond());
146   Record.AddStmt(S->getThen());
147   if (HasElse)
148     Record.AddStmt(S->getElse());
149   if (HasVar)
150     Record.AddDeclRef(S->getConditionVariable());
151   if (HasInit)
152     Record.AddStmt(S->getInit());
153 
154   Record.AddSourceLocation(S->getIfLoc());
155   Record.AddSourceLocation(S->getLParenLoc());
156   Record.AddSourceLocation(S->getRParenLoc());
157   if (HasElse)
158     Record.AddSourceLocation(S->getElseLoc());
159 
160   Code = serialization::STMT_IF;
161 }
162 
163 void ASTStmtWriter::VisitSwitchStmt(SwitchStmt *S) {
164   VisitStmt(S);
165 
166   bool HasInit = S->getInit() != nullptr;
167   bool HasVar = S->getConditionVariableDeclStmt() != nullptr;
168   Record.push_back(HasInit);
169   Record.push_back(HasVar);
170   Record.push_back(S->isAllEnumCasesCovered());
171 
172   Record.AddStmt(S->getCond());
173   Record.AddStmt(S->getBody());
174   if (HasInit)
175     Record.AddStmt(S->getInit());
176   if (HasVar)
177     Record.AddDeclRef(S->getConditionVariable());
178 
179   Record.AddSourceLocation(S->getSwitchLoc());
180   Record.AddSourceLocation(S->getLParenLoc());
181   Record.AddSourceLocation(S->getRParenLoc());
182 
183   for (SwitchCase *SC = S->getSwitchCaseList(); SC;
184        SC = SC->getNextSwitchCase())
185     Record.push_back(Writer.RecordSwitchCaseID(SC));
186   Code = serialization::STMT_SWITCH;
187 }
188 
189 void ASTStmtWriter::VisitWhileStmt(WhileStmt *S) {
190   VisitStmt(S);
191 
192   bool HasVar = S->getConditionVariableDeclStmt() != nullptr;
193   Record.push_back(HasVar);
194 
195   Record.AddStmt(S->getCond());
196   Record.AddStmt(S->getBody());
197   if (HasVar)
198     Record.AddDeclRef(S->getConditionVariable());
199 
200   Record.AddSourceLocation(S->getWhileLoc());
201   Record.AddSourceLocation(S->getLParenLoc());
202   Record.AddSourceLocation(S->getRParenLoc());
203   Code = serialization::STMT_WHILE;
204 }
205 
206 void ASTStmtWriter::VisitDoStmt(DoStmt *S) {
207   VisitStmt(S);
208   Record.AddStmt(S->getCond());
209   Record.AddStmt(S->getBody());
210   Record.AddSourceLocation(S->getDoLoc());
211   Record.AddSourceLocation(S->getWhileLoc());
212   Record.AddSourceLocation(S->getRParenLoc());
213   Code = serialization::STMT_DO;
214 }
215 
216 void ASTStmtWriter::VisitForStmt(ForStmt *S) {
217   VisitStmt(S);
218   Record.AddStmt(S->getInit());
219   Record.AddStmt(S->getCond());
220   Record.AddDeclRef(S->getConditionVariable());
221   Record.AddStmt(S->getInc());
222   Record.AddStmt(S->getBody());
223   Record.AddSourceLocation(S->getForLoc());
224   Record.AddSourceLocation(S->getLParenLoc());
225   Record.AddSourceLocation(S->getRParenLoc());
226   Code = serialization::STMT_FOR;
227 }
228 
229 void ASTStmtWriter::VisitGotoStmt(GotoStmt *S) {
230   VisitStmt(S);
231   Record.AddDeclRef(S->getLabel());
232   Record.AddSourceLocation(S->getGotoLoc());
233   Record.AddSourceLocation(S->getLabelLoc());
234   Code = serialization::STMT_GOTO;
235 }
236 
237 void ASTStmtWriter::VisitIndirectGotoStmt(IndirectGotoStmt *S) {
238   VisitStmt(S);
239   Record.AddSourceLocation(S->getGotoLoc());
240   Record.AddSourceLocation(S->getStarLoc());
241   Record.AddStmt(S->getTarget());
242   Code = serialization::STMT_INDIRECT_GOTO;
243 }
244 
245 void ASTStmtWriter::VisitContinueStmt(ContinueStmt *S) {
246   VisitStmt(S);
247   Record.AddSourceLocation(S->getContinueLoc());
248   Code = serialization::STMT_CONTINUE;
249 }
250 
251 void ASTStmtWriter::VisitBreakStmt(BreakStmt *S) {
252   VisitStmt(S);
253   Record.AddSourceLocation(S->getBreakLoc());
254   Code = serialization::STMT_BREAK;
255 }
256 
257 void ASTStmtWriter::VisitReturnStmt(ReturnStmt *S) {
258   VisitStmt(S);
259 
260   bool HasNRVOCandidate = S->getNRVOCandidate() != nullptr;
261   Record.push_back(HasNRVOCandidate);
262 
263   Record.AddStmt(S->getRetValue());
264   if (HasNRVOCandidate)
265     Record.AddDeclRef(S->getNRVOCandidate());
266 
267   Record.AddSourceLocation(S->getReturnLoc());
268   Code = serialization::STMT_RETURN;
269 }
270 
271 void ASTStmtWriter::VisitDeclStmt(DeclStmt *S) {
272   VisitStmt(S);
273   Record.AddSourceLocation(S->getBeginLoc());
274   Record.AddSourceLocation(S->getEndLoc());
275   DeclGroupRef DG = S->getDeclGroup();
276   for (DeclGroupRef::iterator D = DG.begin(), DEnd = DG.end(); D != DEnd; ++D)
277     Record.AddDeclRef(*D);
278   Code = serialization::STMT_DECL;
279 }
280 
281 void ASTStmtWriter::VisitAsmStmt(AsmStmt *S) {
282   VisitStmt(S);
283   Record.push_back(S->getNumOutputs());
284   Record.push_back(S->getNumInputs());
285   Record.push_back(S->getNumClobbers());
286   Record.AddSourceLocation(S->getAsmLoc());
287   Record.push_back(S->isVolatile());
288   Record.push_back(S->isSimple());
289 }
290 
291 void ASTStmtWriter::VisitGCCAsmStmt(GCCAsmStmt *S) {
292   VisitAsmStmt(S);
293   Record.push_back(S->getNumLabels());
294   Record.AddSourceLocation(S->getRParenLoc());
295   Record.AddStmt(S->getAsmString());
296 
297   // Outputs
298   for (unsigned I = 0, N = S->getNumOutputs(); I != N; ++I) {
299     Record.AddIdentifierRef(S->getOutputIdentifier(I));
300     Record.AddStmt(S->getOutputConstraintLiteral(I));
301     Record.AddStmt(S->getOutputExpr(I));
302   }
303 
304   // Inputs
305   for (unsigned I = 0, N = S->getNumInputs(); I != N; ++I) {
306     Record.AddIdentifierRef(S->getInputIdentifier(I));
307     Record.AddStmt(S->getInputConstraintLiteral(I));
308     Record.AddStmt(S->getInputExpr(I));
309   }
310 
311   // Clobbers
312   for (unsigned I = 0, N = S->getNumClobbers(); I != N; ++I)
313     Record.AddStmt(S->getClobberStringLiteral(I));
314 
315   // Labels
316   for (auto *E : S->labels()) Record.AddStmt(E);
317 
318   Code = serialization::STMT_GCCASM;
319 }
320 
321 void ASTStmtWriter::VisitMSAsmStmt(MSAsmStmt *S) {
322   VisitAsmStmt(S);
323   Record.AddSourceLocation(S->getLBraceLoc());
324   Record.AddSourceLocation(S->getEndLoc());
325   Record.push_back(S->getNumAsmToks());
326   Record.AddString(S->getAsmString());
327 
328   // Tokens
329   for (unsigned I = 0, N = S->getNumAsmToks(); I != N; ++I) {
330     // FIXME: Move this to ASTRecordWriter?
331     Writer.AddToken(S->getAsmToks()[I], Record.getRecordData());
332   }
333 
334   // Clobbers
335   for (unsigned I = 0, N = S->getNumClobbers(); I != N; ++I) {
336     Record.AddString(S->getClobber(I));
337   }
338 
339   // Outputs
340   for (unsigned I = 0, N = S->getNumOutputs(); I != N; ++I) {
341     Record.AddStmt(S->getOutputExpr(I));
342     Record.AddString(S->getOutputConstraint(I));
343   }
344 
345   // Inputs
346   for (unsigned I = 0, N = S->getNumInputs(); I != N; ++I) {
347     Record.AddStmt(S->getInputExpr(I));
348     Record.AddString(S->getInputConstraint(I));
349   }
350 
351   Code = serialization::STMT_MSASM;
352 }
353 
354 void ASTStmtWriter::VisitCoroutineBodyStmt(CoroutineBodyStmt *CoroStmt) {
355   VisitStmt(CoroStmt);
356   Record.push_back(CoroStmt->getParamMoves().size());
357   for (Stmt *S : CoroStmt->children())
358     Record.AddStmt(S);
359   Code = serialization::STMT_COROUTINE_BODY;
360 }
361 
362 void ASTStmtWriter::VisitCoreturnStmt(CoreturnStmt *S) {
363   VisitStmt(S);
364   Record.AddSourceLocation(S->getKeywordLoc());
365   Record.AddStmt(S->getOperand());
366   Record.AddStmt(S->getPromiseCall());
367   Record.push_back(S->isImplicit());
368   Code = serialization::STMT_CORETURN;
369 }
370 
371 void ASTStmtWriter::VisitCoroutineSuspendExpr(CoroutineSuspendExpr *E) {
372   VisitExpr(E);
373   Record.AddSourceLocation(E->getKeywordLoc());
374   for (Stmt *S : E->children())
375     Record.AddStmt(S);
376   Record.AddStmt(E->getOpaqueValue());
377 }
378 
379 void ASTStmtWriter::VisitCoawaitExpr(CoawaitExpr *E) {
380   VisitCoroutineSuspendExpr(E);
381   Record.push_back(E->isImplicit());
382   Code = serialization::EXPR_COAWAIT;
383 }
384 
385 void ASTStmtWriter::VisitCoyieldExpr(CoyieldExpr *E) {
386   VisitCoroutineSuspendExpr(E);
387   Code = serialization::EXPR_COYIELD;
388 }
389 
390 void ASTStmtWriter::VisitDependentCoawaitExpr(DependentCoawaitExpr *E) {
391   VisitExpr(E);
392   Record.AddSourceLocation(E->getKeywordLoc());
393   for (Stmt *S : E->children())
394     Record.AddStmt(S);
395   Code = serialization::EXPR_DEPENDENT_COAWAIT;
396 }
397 
398 static void
399 addConstraintSatisfaction(ASTRecordWriter &Record,
400                           const ASTConstraintSatisfaction &Satisfaction) {
401   Record.push_back(Satisfaction.IsSatisfied);
402   if (!Satisfaction.IsSatisfied) {
403     Record.push_back(Satisfaction.NumRecords);
404     for (const auto &DetailRecord : Satisfaction) {
405       Record.AddStmt(const_cast<Expr *>(DetailRecord.first));
406       auto *E = DetailRecord.second.dyn_cast<Expr *>();
407       Record.push_back(E == nullptr);
408       if (E)
409         Record.AddStmt(E);
410       else {
411         auto *Diag = DetailRecord.second.get<std::pair<SourceLocation,
412                                                        StringRef> *>();
413         Record.AddSourceLocation(Diag->first);
414         Record.AddString(Diag->second);
415       }
416     }
417   }
418 }
419 
420 static void
421 addSubstitutionDiagnostic(
422     ASTRecordWriter &Record,
423     const concepts::Requirement::SubstitutionDiagnostic *D) {
424   Record.AddString(D->SubstitutedEntity);
425   Record.AddSourceLocation(D->DiagLoc);
426   Record.AddString(D->DiagMessage);
427 }
428 
429 void ASTStmtWriter::VisitConceptSpecializationExpr(
430         ConceptSpecializationExpr *E) {
431   VisitExpr(E);
432   ArrayRef<TemplateArgument> TemplateArgs = E->getTemplateArguments();
433   Record.push_back(TemplateArgs.size());
434   Record.AddNestedNameSpecifierLoc(E->getNestedNameSpecifierLoc());
435   Record.AddSourceLocation(E->getTemplateKWLoc());
436   Record.AddDeclarationNameInfo(E->getConceptNameInfo());
437   Record.AddDeclRef(E->getNamedConcept());
438   Record.AddDeclRef(E->getFoundDecl());
439   Record.AddASTTemplateArgumentListInfo(E->getTemplateArgsAsWritten());
440   for (const TemplateArgument &Arg : TemplateArgs)
441     Record.AddTemplateArgument(Arg);
442   if (!E->isValueDependent())
443     addConstraintSatisfaction(Record, E->getSatisfaction());
444 
445   Code = serialization::EXPR_CONCEPT_SPECIALIZATION;
446 }
447 
448 void ASTStmtWriter::VisitRequiresExpr(RequiresExpr *E) {
449   VisitExpr(E);
450   Record.push_back(E->getLocalParameters().size());
451   Record.push_back(E->getRequirements().size());
452   Record.AddSourceLocation(E->RequiresExprBits.RequiresKWLoc);
453   Record.push_back(E->RequiresExprBits.IsSatisfied);
454   Record.AddDeclRef(E->getBody());
455   for (ParmVarDecl *P : E->getLocalParameters())
456     Record.AddDeclRef(P);
457   for (concepts::Requirement *R : E->getRequirements()) {
458     if (auto *TypeReq = dyn_cast<concepts::TypeRequirement>(R)) {
459       Record.push_back(concepts::Requirement::RK_Type);
460       Record.push_back(TypeReq->Status);
461       if (TypeReq->Status == concepts::TypeRequirement::SS_SubstitutionFailure)
462         addSubstitutionDiagnostic(Record, TypeReq->getSubstitutionDiagnostic());
463       else
464         Record.AddTypeSourceInfo(TypeReq->getType());
465     } else if (auto *ExprReq = dyn_cast<concepts::ExprRequirement>(R)) {
466       Record.push_back(ExprReq->getKind());
467       Record.push_back(ExprReq->Status);
468       if (ExprReq->isExprSubstitutionFailure()) {
469         addSubstitutionDiagnostic(Record,
470          ExprReq->Value.get<concepts::Requirement::SubstitutionDiagnostic *>());
471       } else
472         Record.AddStmt(ExprReq->Value.get<Expr *>());
473       if (ExprReq->getKind() == concepts::Requirement::RK_Compound) {
474         Record.AddSourceLocation(ExprReq->NoexceptLoc);
475         const auto &RetReq = ExprReq->getReturnTypeRequirement();
476         if (RetReq.isSubstitutionFailure()) {
477           Record.push_back(2);
478           addSubstitutionDiagnostic(Record, RetReq.getSubstitutionDiagnostic());
479         } else if (RetReq.isTypeConstraint()) {
480           Record.push_back(1);
481           Record.AddTemplateParameterList(
482               RetReq.getTypeConstraintTemplateParameterList());
483           if (ExprReq->Status >=
484               concepts::ExprRequirement::SS_ConstraintsNotSatisfied)
485             Record.AddStmt(
486                 ExprReq->getReturnTypeRequirementSubstitutedConstraintExpr());
487         } else {
488           assert(RetReq.isEmpty());
489           Record.push_back(0);
490         }
491       }
492     } else {
493       auto *NestedReq = cast<concepts::NestedRequirement>(R);
494       Record.push_back(concepts::Requirement::RK_Nested);
495       Record.push_back(NestedReq->isSubstitutionFailure());
496       if (NestedReq->isSubstitutionFailure()){
497         addSubstitutionDiagnostic(Record,
498                                   NestedReq->getSubstitutionDiagnostic());
499       } else {
500         Record.AddStmt(NestedReq->Value.get<Expr *>());
501         if (!NestedReq->isDependent())
502           addConstraintSatisfaction(Record, *NestedReq->Satisfaction);
503       }
504     }
505   }
506   Record.AddSourceLocation(E->getEndLoc());
507 
508   Code = serialization::EXPR_REQUIRES;
509 }
510 
511 
512 void ASTStmtWriter::VisitCapturedStmt(CapturedStmt *S) {
513   VisitStmt(S);
514   // NumCaptures
515   Record.push_back(std::distance(S->capture_begin(), S->capture_end()));
516 
517   // CapturedDecl and captured region kind
518   Record.AddDeclRef(S->getCapturedDecl());
519   Record.push_back(S->getCapturedRegionKind());
520 
521   Record.AddDeclRef(S->getCapturedRecordDecl());
522 
523   // Capture inits
524   for (auto *I : S->capture_inits())
525     Record.AddStmt(I);
526 
527   // Body
528   Record.AddStmt(S->getCapturedStmt());
529 
530   // Captures
531   for (const auto &I : S->captures()) {
532     if (I.capturesThis() || I.capturesVariableArrayType())
533       Record.AddDeclRef(nullptr);
534     else
535       Record.AddDeclRef(I.getCapturedVar());
536     Record.push_back(I.getCaptureKind());
537     Record.AddSourceLocation(I.getLocation());
538   }
539 
540   Code = serialization::STMT_CAPTURED;
541 }
542 
543 void ASTStmtWriter::VisitExpr(Expr *E) {
544   VisitStmt(E);
545   Record.AddTypeRef(E->getType());
546   Record.push_back(E->isTypeDependent());
547   Record.push_back(E->isValueDependent());
548   Record.push_back(E->isInstantiationDependent());
549   Record.push_back(E->containsUnexpandedParameterPack());
550   Record.push_back(E->containsErrors());
551   Record.push_back(E->getValueKind());
552   Record.push_back(E->getObjectKind());
553 }
554 
555 void ASTStmtWriter::VisitConstantExpr(ConstantExpr *E) {
556   VisitExpr(E);
557   Record.push_back(E->ConstantExprBits.ResultKind);
558 
559   Record.push_back(E->ConstantExprBits.APValueKind);
560   Record.push_back(E->ConstantExprBits.IsUnsigned);
561   Record.push_back(E->ConstantExprBits.BitWidth);
562   // HasCleanup not serialized since we can just query the APValue.
563   Record.push_back(E->ConstantExprBits.IsImmediateInvocation);
564 
565   switch (E->ConstantExprBits.ResultKind) {
566   case ConstantExpr::RSK_None:
567     break;
568   case ConstantExpr::RSK_Int64:
569     Record.push_back(E->Int64Result());
570     break;
571   case ConstantExpr::RSK_APValue:
572     Record.AddAPValue(E->APValueResult());
573     break;
574   default:
575     llvm_unreachable("unexpected ResultKind!");
576   }
577 
578   Record.AddStmt(E->getSubExpr());
579   Code = serialization::EXPR_CONSTANT;
580 }
581 
582 void ASTStmtWriter::VisitPredefinedExpr(PredefinedExpr *E) {
583   VisitExpr(E);
584 
585   bool HasFunctionName = E->getFunctionName() != nullptr;
586   Record.push_back(HasFunctionName);
587   Record.push_back(E->getIdentKind()); // FIXME: stable encoding
588   Record.AddSourceLocation(E->getLocation());
589   if (HasFunctionName)
590     Record.AddStmt(E->getFunctionName());
591   Code = serialization::EXPR_PREDEFINED;
592 }
593 
594 void ASTStmtWriter::VisitDeclRefExpr(DeclRefExpr *E) {
595   VisitExpr(E);
596 
597   Record.push_back(E->hasQualifier());
598   Record.push_back(E->getDecl() != E->getFoundDecl());
599   Record.push_back(E->hasTemplateKWAndArgsInfo());
600   Record.push_back(E->hadMultipleCandidates());
601   Record.push_back(E->refersToEnclosingVariableOrCapture());
602   Record.push_back(E->isNonOdrUse());
603 
604   if (E->hasTemplateKWAndArgsInfo()) {
605     unsigned NumTemplateArgs = E->getNumTemplateArgs();
606     Record.push_back(NumTemplateArgs);
607   }
608 
609   DeclarationName::NameKind nk = (E->getDecl()->getDeclName().getNameKind());
610 
611   if ((!E->hasTemplateKWAndArgsInfo()) && (!E->hasQualifier()) &&
612       (E->getDecl() == E->getFoundDecl()) &&
613       nk == DeclarationName::Identifier &&
614       !E->refersToEnclosingVariableOrCapture() && !E->isNonOdrUse()) {
615     AbbrevToUse = Writer.getDeclRefExprAbbrev();
616   }
617 
618   if (E->hasQualifier())
619     Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
620 
621   if (E->getDecl() != E->getFoundDecl())
622     Record.AddDeclRef(E->getFoundDecl());
623 
624   if (E->hasTemplateKWAndArgsInfo())
625     AddTemplateKWAndArgsInfo(*E->getTrailingObjects<ASTTemplateKWAndArgsInfo>(),
626                              E->getTrailingObjects<TemplateArgumentLoc>());
627 
628   Record.AddDeclRef(E->getDecl());
629   Record.AddSourceLocation(E->getLocation());
630   Record.AddDeclarationNameLoc(E->DNLoc, E->getDecl()->getDeclName());
631   Code = serialization::EXPR_DECL_REF;
632 }
633 
634 void ASTStmtWriter::VisitIntegerLiteral(IntegerLiteral *E) {
635   VisitExpr(E);
636   Record.AddSourceLocation(E->getLocation());
637   Record.AddAPInt(E->getValue());
638 
639   if (E->getValue().getBitWidth() == 32) {
640     AbbrevToUse = Writer.getIntegerLiteralAbbrev();
641   }
642 
643   Code = serialization::EXPR_INTEGER_LITERAL;
644 }
645 
646 void ASTStmtWriter::VisitFixedPointLiteral(FixedPointLiteral *E) {
647   VisitExpr(E);
648   Record.AddSourceLocation(E->getLocation());
649   Record.push_back(E->getScale());
650   Record.AddAPInt(E->getValue());
651   Code = serialization::EXPR_FIXEDPOINT_LITERAL;
652 }
653 
654 void ASTStmtWriter::VisitFloatingLiteral(FloatingLiteral *E) {
655   VisitExpr(E);
656   Record.push_back(E->getRawSemantics());
657   Record.push_back(E->isExact());
658   Record.AddAPFloat(E->getValue());
659   Record.AddSourceLocation(E->getLocation());
660   Code = serialization::EXPR_FLOATING_LITERAL;
661 }
662 
663 void ASTStmtWriter::VisitImaginaryLiteral(ImaginaryLiteral *E) {
664   VisitExpr(E);
665   Record.AddStmt(E->getSubExpr());
666   Code = serialization::EXPR_IMAGINARY_LITERAL;
667 }
668 
669 void ASTStmtWriter::VisitStringLiteral(StringLiteral *E) {
670   VisitExpr(E);
671 
672   // Store the various bits of data of StringLiteral.
673   Record.push_back(E->getNumConcatenated());
674   Record.push_back(E->getLength());
675   Record.push_back(E->getCharByteWidth());
676   Record.push_back(E->getKind());
677   Record.push_back(E->isPascal());
678 
679   // Store the trailing array of SourceLocation.
680   for (unsigned I = 0, N = E->getNumConcatenated(); I != N; ++I)
681     Record.AddSourceLocation(E->getStrTokenLoc(I));
682 
683   // Store the trailing array of char holding the string data.
684   StringRef StrData = E->getBytes();
685   for (unsigned I = 0, N = E->getByteLength(); I != N; ++I)
686     Record.push_back(StrData[I]);
687 
688   Code = serialization::EXPR_STRING_LITERAL;
689 }
690 
691 void ASTStmtWriter::VisitCharacterLiteral(CharacterLiteral *E) {
692   VisitExpr(E);
693   Record.push_back(E->getValue());
694   Record.AddSourceLocation(E->getLocation());
695   Record.push_back(E->getKind());
696 
697   AbbrevToUse = Writer.getCharacterLiteralAbbrev();
698 
699   Code = serialization::EXPR_CHARACTER_LITERAL;
700 }
701 
702 void ASTStmtWriter::VisitParenExpr(ParenExpr *E) {
703   VisitExpr(E);
704   Record.AddSourceLocation(E->getLParen());
705   Record.AddSourceLocation(E->getRParen());
706   Record.AddStmt(E->getSubExpr());
707   Code = serialization::EXPR_PAREN;
708 }
709 
710 void ASTStmtWriter::VisitParenListExpr(ParenListExpr *E) {
711   VisitExpr(E);
712   Record.push_back(E->getNumExprs());
713   for (auto *SubStmt : E->exprs())
714     Record.AddStmt(SubStmt);
715   Record.AddSourceLocation(E->getLParenLoc());
716   Record.AddSourceLocation(E->getRParenLoc());
717   Code = serialization::EXPR_PAREN_LIST;
718 }
719 
720 void ASTStmtWriter::VisitUnaryOperator(UnaryOperator *E) {
721   VisitExpr(E);
722   bool HasFPFeatures = E->hasStoredFPFeatures();
723   // Write this first for easy access when deserializing, as they affect the
724   // size of the UnaryOperator.
725   Record.push_back(HasFPFeatures);
726   Record.AddStmt(E->getSubExpr());
727   Record.push_back(E->getOpcode()); // FIXME: stable encoding
728   Record.AddSourceLocation(E->getOperatorLoc());
729   Record.push_back(E->canOverflow());
730   if (HasFPFeatures)
731     Record.push_back(E->getStoredFPFeatures().getAsOpaqueInt());
732   Code = serialization::EXPR_UNARY_OPERATOR;
733 }
734 
735 void ASTStmtWriter::VisitOffsetOfExpr(OffsetOfExpr *E) {
736   VisitExpr(E);
737   Record.push_back(E->getNumComponents());
738   Record.push_back(E->getNumExpressions());
739   Record.AddSourceLocation(E->getOperatorLoc());
740   Record.AddSourceLocation(E->getRParenLoc());
741   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
742   for (unsigned I = 0, N = E->getNumComponents(); I != N; ++I) {
743     const OffsetOfNode &ON = E->getComponent(I);
744     Record.push_back(ON.getKind()); // FIXME: Stable encoding
745     Record.AddSourceLocation(ON.getSourceRange().getBegin());
746     Record.AddSourceLocation(ON.getSourceRange().getEnd());
747     switch (ON.getKind()) {
748     case OffsetOfNode::Array:
749       Record.push_back(ON.getArrayExprIndex());
750       break;
751 
752     case OffsetOfNode::Field:
753       Record.AddDeclRef(ON.getField());
754       break;
755 
756     case OffsetOfNode::Identifier:
757       Record.AddIdentifierRef(ON.getFieldName());
758       break;
759 
760     case OffsetOfNode::Base:
761       Record.AddCXXBaseSpecifier(*ON.getBase());
762       break;
763     }
764   }
765   for (unsigned I = 0, N = E->getNumExpressions(); I != N; ++I)
766     Record.AddStmt(E->getIndexExpr(I));
767   Code = serialization::EXPR_OFFSETOF;
768 }
769 
770 void ASTStmtWriter::VisitUnaryExprOrTypeTraitExpr(UnaryExprOrTypeTraitExpr *E) {
771   VisitExpr(E);
772   Record.push_back(E->getKind());
773   if (E->isArgumentType())
774     Record.AddTypeSourceInfo(E->getArgumentTypeInfo());
775   else {
776     Record.push_back(0);
777     Record.AddStmt(E->getArgumentExpr());
778   }
779   Record.AddSourceLocation(E->getOperatorLoc());
780   Record.AddSourceLocation(E->getRParenLoc());
781   Code = serialization::EXPR_SIZEOF_ALIGN_OF;
782 }
783 
784 void ASTStmtWriter::VisitArraySubscriptExpr(ArraySubscriptExpr *E) {
785   VisitExpr(E);
786   Record.AddStmt(E->getLHS());
787   Record.AddStmt(E->getRHS());
788   Record.AddSourceLocation(E->getRBracketLoc());
789   Code = serialization::EXPR_ARRAY_SUBSCRIPT;
790 }
791 
792 void ASTStmtWriter::VisitMatrixSubscriptExpr(MatrixSubscriptExpr *E) {
793   VisitExpr(E);
794   Record.AddStmt(E->getBase());
795   Record.AddStmt(E->getRowIdx());
796   Record.AddStmt(E->getColumnIdx());
797   Record.AddSourceLocation(E->getRBracketLoc());
798   Code = serialization::EXPR_ARRAY_SUBSCRIPT;
799 }
800 
801 void ASTStmtWriter::VisitOMPArraySectionExpr(OMPArraySectionExpr *E) {
802   VisitExpr(E);
803   Record.AddStmt(E->getBase());
804   Record.AddStmt(E->getLowerBound());
805   Record.AddStmt(E->getLength());
806   Record.AddStmt(E->getStride());
807   Record.AddSourceLocation(E->getColonLocFirst());
808   Record.AddSourceLocation(E->getColonLocSecond());
809   Record.AddSourceLocation(E->getRBracketLoc());
810   Code = serialization::EXPR_OMP_ARRAY_SECTION;
811 }
812 
813 void ASTStmtWriter::VisitOMPArrayShapingExpr(OMPArrayShapingExpr *E) {
814   VisitExpr(E);
815   Record.push_back(E->getDimensions().size());
816   Record.AddStmt(E->getBase());
817   for (Expr *Dim : E->getDimensions())
818     Record.AddStmt(Dim);
819   for (SourceRange SR : E->getBracketsRanges())
820     Record.AddSourceRange(SR);
821   Record.AddSourceLocation(E->getLParenLoc());
822   Record.AddSourceLocation(E->getRParenLoc());
823   Code = serialization::EXPR_OMP_ARRAY_SHAPING;
824 }
825 
826 void ASTStmtWriter::VisitOMPIteratorExpr(OMPIteratorExpr *E) {
827   VisitExpr(E);
828   Record.push_back(E->numOfIterators());
829   Record.AddSourceLocation(E->getIteratorKwLoc());
830   Record.AddSourceLocation(E->getLParenLoc());
831   Record.AddSourceLocation(E->getRParenLoc());
832   for (unsigned I = 0, End = E->numOfIterators(); I < End; ++I) {
833     Record.AddDeclRef(E->getIteratorDecl(I));
834     Record.AddSourceLocation(E->getAssignLoc(I));
835     OMPIteratorExpr::IteratorRange Range = E->getIteratorRange(I);
836     Record.AddStmt(Range.Begin);
837     Record.AddStmt(Range.End);
838     Record.AddStmt(Range.Step);
839     Record.AddSourceLocation(E->getColonLoc(I));
840     if (Range.Step)
841       Record.AddSourceLocation(E->getSecondColonLoc(I));
842     // Serialize helpers
843     OMPIteratorHelperData &HD = E->getHelper(I);
844     Record.AddDeclRef(HD.CounterVD);
845     Record.AddStmt(HD.Upper);
846     Record.AddStmt(HD.Update);
847     Record.AddStmt(HD.CounterUpdate);
848   }
849   Code = serialization::EXPR_OMP_ITERATOR;
850 }
851 
852 void ASTStmtWriter::VisitCallExpr(CallExpr *E) {
853   VisitExpr(E);
854   Record.push_back(E->getNumArgs());
855   Record.push_back(E->hasStoredFPFeatures());
856   Record.AddSourceLocation(E->getRParenLoc());
857   Record.AddStmt(E->getCallee());
858   for (CallExpr::arg_iterator Arg = E->arg_begin(), ArgEnd = E->arg_end();
859        Arg != ArgEnd; ++Arg)
860     Record.AddStmt(*Arg);
861   Record.push_back(static_cast<unsigned>(E->getADLCallKind()));
862   if (E->hasStoredFPFeatures())
863     Record.push_back(E->getFPFeatures().getAsOpaqueInt());
864   Code = serialization::EXPR_CALL;
865 }
866 
867 void ASTStmtWriter::VisitRecoveryExpr(RecoveryExpr *E) {
868   VisitExpr(E);
869   Record.push_back(std::distance(E->children().begin(), E->children().end()));
870   Record.AddSourceLocation(E->getBeginLoc());
871   Record.AddSourceLocation(E->getEndLoc());
872   for (Stmt *Child : E->children())
873     Record.AddStmt(Child);
874   Code = serialization::EXPR_RECOVERY;
875 }
876 
877 void ASTStmtWriter::VisitMemberExpr(MemberExpr *E) {
878   VisitExpr(E);
879 
880   bool HasQualifier = E->hasQualifier();
881   bool HasFoundDecl =
882       E->hasQualifierOrFoundDecl() &&
883       (E->getFoundDecl().getDecl() != E->getMemberDecl() ||
884        E->getFoundDecl().getAccess() != E->getMemberDecl()->getAccess());
885   bool HasTemplateInfo = E->hasTemplateKWAndArgsInfo();
886   unsigned NumTemplateArgs = E->getNumTemplateArgs();
887 
888   // Write these first for easy access when deserializing, as they affect the
889   // size of the MemberExpr.
890   Record.push_back(HasQualifier);
891   Record.push_back(HasFoundDecl);
892   Record.push_back(HasTemplateInfo);
893   Record.push_back(NumTemplateArgs);
894 
895   Record.AddStmt(E->getBase());
896   Record.AddDeclRef(E->getMemberDecl());
897   Record.AddDeclarationNameLoc(E->MemberDNLoc,
898                                E->getMemberDecl()->getDeclName());
899   Record.AddSourceLocation(E->getMemberLoc());
900   Record.push_back(E->isArrow());
901   Record.push_back(E->hadMultipleCandidates());
902   Record.push_back(E->isNonOdrUse());
903   Record.AddSourceLocation(E->getOperatorLoc());
904 
905   if (HasFoundDecl) {
906     DeclAccessPair FoundDecl = E->getFoundDecl();
907     Record.AddDeclRef(FoundDecl.getDecl());
908     Record.push_back(FoundDecl.getAccess());
909   }
910 
911   if (HasQualifier)
912     Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
913 
914   if (HasTemplateInfo)
915     AddTemplateKWAndArgsInfo(*E->getTrailingObjects<ASTTemplateKWAndArgsInfo>(),
916                              E->getTrailingObjects<TemplateArgumentLoc>());
917 
918   Code = serialization::EXPR_MEMBER;
919 }
920 
921 void ASTStmtWriter::VisitObjCIsaExpr(ObjCIsaExpr *E) {
922   VisitExpr(E);
923   Record.AddStmt(E->getBase());
924   Record.AddSourceLocation(E->getIsaMemberLoc());
925   Record.AddSourceLocation(E->getOpLoc());
926   Record.push_back(E->isArrow());
927   Code = serialization::EXPR_OBJC_ISA;
928 }
929 
930 void ASTStmtWriter::
931 VisitObjCIndirectCopyRestoreExpr(ObjCIndirectCopyRestoreExpr *E) {
932   VisitExpr(E);
933   Record.AddStmt(E->getSubExpr());
934   Record.push_back(E->shouldCopy());
935   Code = serialization::EXPR_OBJC_INDIRECT_COPY_RESTORE;
936 }
937 
938 void ASTStmtWriter::VisitObjCBridgedCastExpr(ObjCBridgedCastExpr *E) {
939   VisitExplicitCastExpr(E);
940   Record.AddSourceLocation(E->getLParenLoc());
941   Record.AddSourceLocation(E->getBridgeKeywordLoc());
942   Record.push_back(E->getBridgeKind()); // FIXME: Stable encoding
943   Code = serialization::EXPR_OBJC_BRIDGED_CAST;
944 }
945 
946 void ASTStmtWriter::VisitCastExpr(CastExpr *E) {
947   VisitExpr(E);
948   Record.push_back(E->path_size());
949   Record.push_back(E->hasStoredFPFeatures());
950   Record.AddStmt(E->getSubExpr());
951   Record.push_back(E->getCastKind()); // FIXME: stable encoding
952 
953   for (CastExpr::path_iterator
954          PI = E->path_begin(), PE = E->path_end(); PI != PE; ++PI)
955     Record.AddCXXBaseSpecifier(**PI);
956 
957   if (E->hasStoredFPFeatures())
958     Record.push_back(E->getFPFeatures().getAsOpaqueInt());
959 }
960 
961 void ASTStmtWriter::VisitBinaryOperator(BinaryOperator *E) {
962   VisitExpr(E);
963   bool HasFPFeatures = E->hasStoredFPFeatures();
964   // Write this first for easy access when deserializing, as they affect the
965   // size of the UnaryOperator.
966   Record.push_back(HasFPFeatures);
967   Record.push_back(E->getOpcode()); // FIXME: stable encoding
968   Record.AddStmt(E->getLHS());
969   Record.AddStmt(E->getRHS());
970   Record.AddSourceLocation(E->getOperatorLoc());
971   if (HasFPFeatures)
972     Record.push_back(E->getStoredFPFeatures().getAsOpaqueInt());
973   Code = serialization::EXPR_BINARY_OPERATOR;
974 }
975 
976 void ASTStmtWriter::VisitCompoundAssignOperator(CompoundAssignOperator *E) {
977   VisitBinaryOperator(E);
978   Record.AddTypeRef(E->getComputationLHSType());
979   Record.AddTypeRef(E->getComputationResultType());
980   Code = serialization::EXPR_COMPOUND_ASSIGN_OPERATOR;
981 }
982 
983 void ASTStmtWriter::VisitConditionalOperator(ConditionalOperator *E) {
984   VisitExpr(E);
985   Record.AddStmt(E->getCond());
986   Record.AddStmt(E->getLHS());
987   Record.AddStmt(E->getRHS());
988   Record.AddSourceLocation(E->getQuestionLoc());
989   Record.AddSourceLocation(E->getColonLoc());
990   Code = serialization::EXPR_CONDITIONAL_OPERATOR;
991 }
992 
993 void
994 ASTStmtWriter::VisitBinaryConditionalOperator(BinaryConditionalOperator *E) {
995   VisitExpr(E);
996   Record.AddStmt(E->getOpaqueValue());
997   Record.AddStmt(E->getCommon());
998   Record.AddStmt(E->getCond());
999   Record.AddStmt(E->getTrueExpr());
1000   Record.AddStmt(E->getFalseExpr());
1001   Record.AddSourceLocation(E->getQuestionLoc());
1002   Record.AddSourceLocation(E->getColonLoc());
1003   Code = serialization::EXPR_BINARY_CONDITIONAL_OPERATOR;
1004 }
1005 
1006 void ASTStmtWriter::VisitImplicitCastExpr(ImplicitCastExpr *E) {
1007   VisitCastExpr(E);
1008   Record.push_back(E->isPartOfExplicitCast());
1009 
1010   if (E->path_size() == 0 && !E->hasStoredFPFeatures())
1011     AbbrevToUse = Writer.getExprImplicitCastAbbrev();
1012 
1013   Code = serialization::EXPR_IMPLICIT_CAST;
1014 }
1015 
1016 void ASTStmtWriter::VisitExplicitCastExpr(ExplicitCastExpr *E) {
1017   VisitCastExpr(E);
1018   Record.AddTypeSourceInfo(E->getTypeInfoAsWritten());
1019 }
1020 
1021 void ASTStmtWriter::VisitCStyleCastExpr(CStyleCastExpr *E) {
1022   VisitExplicitCastExpr(E);
1023   Record.AddSourceLocation(E->getLParenLoc());
1024   Record.AddSourceLocation(E->getRParenLoc());
1025   Code = serialization::EXPR_CSTYLE_CAST;
1026 }
1027 
1028 void ASTStmtWriter::VisitCompoundLiteralExpr(CompoundLiteralExpr *E) {
1029   VisitExpr(E);
1030   Record.AddSourceLocation(E->getLParenLoc());
1031   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1032   Record.AddStmt(E->getInitializer());
1033   Record.push_back(E->isFileScope());
1034   Code = serialization::EXPR_COMPOUND_LITERAL;
1035 }
1036 
1037 void ASTStmtWriter::VisitExtVectorElementExpr(ExtVectorElementExpr *E) {
1038   VisitExpr(E);
1039   Record.AddStmt(E->getBase());
1040   Record.AddIdentifierRef(&E->getAccessor());
1041   Record.AddSourceLocation(E->getAccessorLoc());
1042   Code = serialization::EXPR_EXT_VECTOR_ELEMENT;
1043 }
1044 
1045 void ASTStmtWriter::VisitInitListExpr(InitListExpr *E) {
1046   VisitExpr(E);
1047   // NOTE: only add the (possibly null) syntactic form.
1048   // No need to serialize the isSemanticForm flag and the semantic form.
1049   Record.AddStmt(E->getSyntacticForm());
1050   Record.AddSourceLocation(E->getLBraceLoc());
1051   Record.AddSourceLocation(E->getRBraceLoc());
1052   bool isArrayFiller = E->ArrayFillerOrUnionFieldInit.is<Expr*>();
1053   Record.push_back(isArrayFiller);
1054   if (isArrayFiller)
1055     Record.AddStmt(E->getArrayFiller());
1056   else
1057     Record.AddDeclRef(E->getInitializedFieldInUnion());
1058   Record.push_back(E->hadArrayRangeDesignator());
1059   Record.push_back(E->getNumInits());
1060   if (isArrayFiller) {
1061     // ArrayFiller may have filled "holes" due to designated initializer.
1062     // Replace them by 0 to indicate that the filler goes in that place.
1063     Expr *filler = E->getArrayFiller();
1064     for (unsigned I = 0, N = E->getNumInits(); I != N; ++I)
1065       Record.AddStmt(E->getInit(I) != filler ? E->getInit(I) : nullptr);
1066   } else {
1067     for (unsigned I = 0, N = E->getNumInits(); I != N; ++I)
1068       Record.AddStmt(E->getInit(I));
1069   }
1070   Code = serialization::EXPR_INIT_LIST;
1071 }
1072 
1073 void ASTStmtWriter::VisitDesignatedInitExpr(DesignatedInitExpr *E) {
1074   VisitExpr(E);
1075   Record.push_back(E->getNumSubExprs());
1076   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
1077     Record.AddStmt(E->getSubExpr(I));
1078   Record.AddSourceLocation(E->getEqualOrColonLoc());
1079   Record.push_back(E->usesGNUSyntax());
1080   for (const DesignatedInitExpr::Designator &D : E->designators()) {
1081     if (D.isFieldDesignator()) {
1082       if (FieldDecl *Field = D.getField()) {
1083         Record.push_back(serialization::DESIG_FIELD_DECL);
1084         Record.AddDeclRef(Field);
1085       } else {
1086         Record.push_back(serialization::DESIG_FIELD_NAME);
1087         Record.AddIdentifierRef(D.getFieldName());
1088       }
1089       Record.AddSourceLocation(D.getDotLoc());
1090       Record.AddSourceLocation(D.getFieldLoc());
1091     } else if (D.isArrayDesignator()) {
1092       Record.push_back(serialization::DESIG_ARRAY);
1093       Record.push_back(D.getFirstExprIndex());
1094       Record.AddSourceLocation(D.getLBracketLoc());
1095       Record.AddSourceLocation(D.getRBracketLoc());
1096     } else {
1097       assert(D.isArrayRangeDesignator() && "Unknown designator");
1098       Record.push_back(serialization::DESIG_ARRAY_RANGE);
1099       Record.push_back(D.getFirstExprIndex());
1100       Record.AddSourceLocation(D.getLBracketLoc());
1101       Record.AddSourceLocation(D.getEllipsisLoc());
1102       Record.AddSourceLocation(D.getRBracketLoc());
1103     }
1104   }
1105   Code = serialization::EXPR_DESIGNATED_INIT;
1106 }
1107 
1108 void ASTStmtWriter::VisitDesignatedInitUpdateExpr(DesignatedInitUpdateExpr *E) {
1109   VisitExpr(E);
1110   Record.AddStmt(E->getBase());
1111   Record.AddStmt(E->getUpdater());
1112   Code = serialization::EXPR_DESIGNATED_INIT_UPDATE;
1113 }
1114 
1115 void ASTStmtWriter::VisitNoInitExpr(NoInitExpr *E) {
1116   VisitExpr(E);
1117   Code = serialization::EXPR_NO_INIT;
1118 }
1119 
1120 void ASTStmtWriter::VisitArrayInitLoopExpr(ArrayInitLoopExpr *E) {
1121   VisitExpr(E);
1122   Record.AddStmt(E->SubExprs[0]);
1123   Record.AddStmt(E->SubExprs[1]);
1124   Code = serialization::EXPR_ARRAY_INIT_LOOP;
1125 }
1126 
1127 void ASTStmtWriter::VisitArrayInitIndexExpr(ArrayInitIndexExpr *E) {
1128   VisitExpr(E);
1129   Code = serialization::EXPR_ARRAY_INIT_INDEX;
1130 }
1131 
1132 void ASTStmtWriter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) {
1133   VisitExpr(E);
1134   Code = serialization::EXPR_IMPLICIT_VALUE_INIT;
1135 }
1136 
1137 void ASTStmtWriter::VisitVAArgExpr(VAArgExpr *E) {
1138   VisitExpr(E);
1139   Record.AddStmt(E->getSubExpr());
1140   Record.AddTypeSourceInfo(E->getWrittenTypeInfo());
1141   Record.AddSourceLocation(E->getBuiltinLoc());
1142   Record.AddSourceLocation(E->getRParenLoc());
1143   Record.push_back(E->isMicrosoftABI());
1144   Code = serialization::EXPR_VA_ARG;
1145 }
1146 
1147 void ASTStmtWriter::VisitSourceLocExpr(SourceLocExpr *E) {
1148   VisitExpr(E);
1149   Record.AddDeclRef(cast_or_null<Decl>(E->getParentContext()));
1150   Record.AddSourceLocation(E->getBeginLoc());
1151   Record.AddSourceLocation(E->getEndLoc());
1152   Record.push_back(E->getIdentKind());
1153   Code = serialization::EXPR_SOURCE_LOC;
1154 }
1155 
1156 void ASTStmtWriter::VisitAddrLabelExpr(AddrLabelExpr *E) {
1157   VisitExpr(E);
1158   Record.AddSourceLocation(E->getAmpAmpLoc());
1159   Record.AddSourceLocation(E->getLabelLoc());
1160   Record.AddDeclRef(E->getLabel());
1161   Code = serialization::EXPR_ADDR_LABEL;
1162 }
1163 
1164 void ASTStmtWriter::VisitStmtExpr(StmtExpr *E) {
1165   VisitExpr(E);
1166   Record.AddStmt(E->getSubStmt());
1167   Record.AddSourceLocation(E->getLParenLoc());
1168   Record.AddSourceLocation(E->getRParenLoc());
1169   Record.push_back(E->getTemplateDepth());
1170   Code = serialization::EXPR_STMT;
1171 }
1172 
1173 void ASTStmtWriter::VisitChooseExpr(ChooseExpr *E) {
1174   VisitExpr(E);
1175   Record.AddStmt(E->getCond());
1176   Record.AddStmt(E->getLHS());
1177   Record.AddStmt(E->getRHS());
1178   Record.AddSourceLocation(E->getBuiltinLoc());
1179   Record.AddSourceLocation(E->getRParenLoc());
1180   Record.push_back(E->isConditionDependent() ? false : E->isConditionTrue());
1181   Code = serialization::EXPR_CHOOSE;
1182 }
1183 
1184 void ASTStmtWriter::VisitGNUNullExpr(GNUNullExpr *E) {
1185   VisitExpr(E);
1186   Record.AddSourceLocation(E->getTokenLocation());
1187   Code = serialization::EXPR_GNU_NULL;
1188 }
1189 
1190 void ASTStmtWriter::VisitShuffleVectorExpr(ShuffleVectorExpr *E) {
1191   VisitExpr(E);
1192   Record.push_back(E->getNumSubExprs());
1193   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
1194     Record.AddStmt(E->getExpr(I));
1195   Record.AddSourceLocation(E->getBuiltinLoc());
1196   Record.AddSourceLocation(E->getRParenLoc());
1197   Code = serialization::EXPR_SHUFFLE_VECTOR;
1198 }
1199 
1200 void ASTStmtWriter::VisitConvertVectorExpr(ConvertVectorExpr *E) {
1201   VisitExpr(E);
1202   Record.AddSourceLocation(E->getBuiltinLoc());
1203   Record.AddSourceLocation(E->getRParenLoc());
1204   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1205   Record.AddStmt(E->getSrcExpr());
1206   Code = serialization::EXPR_CONVERT_VECTOR;
1207 }
1208 
1209 void ASTStmtWriter::VisitBlockExpr(BlockExpr *E) {
1210   VisitExpr(E);
1211   Record.AddDeclRef(E->getBlockDecl());
1212   Code = serialization::EXPR_BLOCK;
1213 }
1214 
1215 void ASTStmtWriter::VisitGenericSelectionExpr(GenericSelectionExpr *E) {
1216   VisitExpr(E);
1217 
1218   Record.push_back(E->getNumAssocs());
1219   Record.push_back(E->ResultIndex);
1220   Record.AddSourceLocation(E->getGenericLoc());
1221   Record.AddSourceLocation(E->getDefaultLoc());
1222   Record.AddSourceLocation(E->getRParenLoc());
1223 
1224   Stmt **Stmts = E->getTrailingObjects<Stmt *>();
1225   // Add 1 to account for the controlling expression which is the first
1226   // expression in the trailing array of Stmt *. This is not needed for
1227   // the trailing array of TypeSourceInfo *.
1228   for (unsigned I = 0, N = E->getNumAssocs() + 1; I < N; ++I)
1229     Record.AddStmt(Stmts[I]);
1230 
1231   TypeSourceInfo **TSIs = E->getTrailingObjects<TypeSourceInfo *>();
1232   for (unsigned I = 0, N = E->getNumAssocs(); I < N; ++I)
1233     Record.AddTypeSourceInfo(TSIs[I]);
1234 
1235   Code = serialization::EXPR_GENERIC_SELECTION;
1236 }
1237 
1238 void ASTStmtWriter::VisitPseudoObjectExpr(PseudoObjectExpr *E) {
1239   VisitExpr(E);
1240   Record.push_back(E->getNumSemanticExprs());
1241 
1242   // Push the result index.  Currently, this needs to exactly match
1243   // the encoding used internally for ResultIndex.
1244   unsigned result = E->getResultExprIndex();
1245   result = (result == PseudoObjectExpr::NoResult ? 0 : result + 1);
1246   Record.push_back(result);
1247 
1248   Record.AddStmt(E->getSyntacticForm());
1249   for (PseudoObjectExpr::semantics_iterator
1250          i = E->semantics_begin(), e = E->semantics_end(); i != e; ++i) {
1251     Record.AddStmt(*i);
1252   }
1253   Code = serialization::EXPR_PSEUDO_OBJECT;
1254 }
1255 
1256 void ASTStmtWriter::VisitAtomicExpr(AtomicExpr *E) {
1257   VisitExpr(E);
1258   Record.push_back(E->getOp());
1259   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
1260     Record.AddStmt(E->getSubExprs()[I]);
1261   Record.AddSourceLocation(E->getBuiltinLoc());
1262   Record.AddSourceLocation(E->getRParenLoc());
1263   Code = serialization::EXPR_ATOMIC;
1264 }
1265 
1266 //===----------------------------------------------------------------------===//
1267 // Objective-C Expressions and Statements.
1268 //===----------------------------------------------------------------------===//
1269 
1270 void ASTStmtWriter::VisitObjCStringLiteral(ObjCStringLiteral *E) {
1271   VisitExpr(E);
1272   Record.AddStmt(E->getString());
1273   Record.AddSourceLocation(E->getAtLoc());
1274   Code = serialization::EXPR_OBJC_STRING_LITERAL;
1275 }
1276 
1277 void ASTStmtWriter::VisitObjCBoxedExpr(ObjCBoxedExpr *E) {
1278   VisitExpr(E);
1279   Record.AddStmt(E->getSubExpr());
1280   Record.AddDeclRef(E->getBoxingMethod());
1281   Record.AddSourceRange(E->getSourceRange());
1282   Code = serialization::EXPR_OBJC_BOXED_EXPRESSION;
1283 }
1284 
1285 void ASTStmtWriter::VisitObjCArrayLiteral(ObjCArrayLiteral *E) {
1286   VisitExpr(E);
1287   Record.push_back(E->getNumElements());
1288   for (unsigned i = 0; i < E->getNumElements(); i++)
1289     Record.AddStmt(E->getElement(i));
1290   Record.AddDeclRef(E->getArrayWithObjectsMethod());
1291   Record.AddSourceRange(E->getSourceRange());
1292   Code = serialization::EXPR_OBJC_ARRAY_LITERAL;
1293 }
1294 
1295 void ASTStmtWriter::VisitObjCDictionaryLiteral(ObjCDictionaryLiteral *E) {
1296   VisitExpr(E);
1297   Record.push_back(E->getNumElements());
1298   Record.push_back(E->HasPackExpansions);
1299   for (unsigned i = 0; i < E->getNumElements(); i++) {
1300     ObjCDictionaryElement Element = E->getKeyValueElement(i);
1301     Record.AddStmt(Element.Key);
1302     Record.AddStmt(Element.Value);
1303     if (E->HasPackExpansions) {
1304       Record.AddSourceLocation(Element.EllipsisLoc);
1305       unsigned NumExpansions = 0;
1306       if (Element.NumExpansions)
1307         NumExpansions = *Element.NumExpansions + 1;
1308       Record.push_back(NumExpansions);
1309     }
1310   }
1311 
1312   Record.AddDeclRef(E->getDictWithObjectsMethod());
1313   Record.AddSourceRange(E->getSourceRange());
1314   Code = serialization::EXPR_OBJC_DICTIONARY_LITERAL;
1315 }
1316 
1317 void ASTStmtWriter::VisitObjCEncodeExpr(ObjCEncodeExpr *E) {
1318   VisitExpr(E);
1319   Record.AddTypeSourceInfo(E->getEncodedTypeSourceInfo());
1320   Record.AddSourceLocation(E->getAtLoc());
1321   Record.AddSourceLocation(E->getRParenLoc());
1322   Code = serialization::EXPR_OBJC_ENCODE;
1323 }
1324 
1325 void ASTStmtWriter::VisitObjCSelectorExpr(ObjCSelectorExpr *E) {
1326   VisitExpr(E);
1327   Record.AddSelectorRef(E->getSelector());
1328   Record.AddSourceLocation(E->getAtLoc());
1329   Record.AddSourceLocation(E->getRParenLoc());
1330   Code = serialization::EXPR_OBJC_SELECTOR_EXPR;
1331 }
1332 
1333 void ASTStmtWriter::VisitObjCProtocolExpr(ObjCProtocolExpr *E) {
1334   VisitExpr(E);
1335   Record.AddDeclRef(E->getProtocol());
1336   Record.AddSourceLocation(E->getAtLoc());
1337   Record.AddSourceLocation(E->ProtoLoc);
1338   Record.AddSourceLocation(E->getRParenLoc());
1339   Code = serialization::EXPR_OBJC_PROTOCOL_EXPR;
1340 }
1341 
1342 void ASTStmtWriter::VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) {
1343   VisitExpr(E);
1344   Record.AddDeclRef(E->getDecl());
1345   Record.AddSourceLocation(E->getLocation());
1346   Record.AddSourceLocation(E->getOpLoc());
1347   Record.AddStmt(E->getBase());
1348   Record.push_back(E->isArrow());
1349   Record.push_back(E->isFreeIvar());
1350   Code = serialization::EXPR_OBJC_IVAR_REF_EXPR;
1351 }
1352 
1353 void ASTStmtWriter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) {
1354   VisitExpr(E);
1355   Record.push_back(E->SetterAndMethodRefFlags.getInt());
1356   Record.push_back(E->isImplicitProperty());
1357   if (E->isImplicitProperty()) {
1358     Record.AddDeclRef(E->getImplicitPropertyGetter());
1359     Record.AddDeclRef(E->getImplicitPropertySetter());
1360   } else {
1361     Record.AddDeclRef(E->getExplicitProperty());
1362   }
1363   Record.AddSourceLocation(E->getLocation());
1364   Record.AddSourceLocation(E->getReceiverLocation());
1365   if (E->isObjectReceiver()) {
1366     Record.push_back(0);
1367     Record.AddStmt(E->getBase());
1368   } else if (E->isSuperReceiver()) {
1369     Record.push_back(1);
1370     Record.AddTypeRef(E->getSuperReceiverType());
1371   } else {
1372     Record.push_back(2);
1373     Record.AddDeclRef(E->getClassReceiver());
1374   }
1375 
1376   Code = serialization::EXPR_OBJC_PROPERTY_REF_EXPR;
1377 }
1378 
1379 void ASTStmtWriter::VisitObjCSubscriptRefExpr(ObjCSubscriptRefExpr *E) {
1380   VisitExpr(E);
1381   Record.AddSourceLocation(E->getRBracket());
1382   Record.AddStmt(E->getBaseExpr());
1383   Record.AddStmt(E->getKeyExpr());
1384   Record.AddDeclRef(E->getAtIndexMethodDecl());
1385   Record.AddDeclRef(E->setAtIndexMethodDecl());
1386 
1387   Code = serialization::EXPR_OBJC_SUBSCRIPT_REF_EXPR;
1388 }
1389 
1390 void ASTStmtWriter::VisitObjCMessageExpr(ObjCMessageExpr *E) {
1391   VisitExpr(E);
1392   Record.push_back(E->getNumArgs());
1393   Record.push_back(E->getNumStoredSelLocs());
1394   Record.push_back(E->SelLocsKind);
1395   Record.push_back(E->isDelegateInitCall());
1396   Record.push_back(E->IsImplicit);
1397   Record.push_back((unsigned)E->getReceiverKind()); // FIXME: stable encoding
1398   switch (E->getReceiverKind()) {
1399   case ObjCMessageExpr::Instance:
1400     Record.AddStmt(E->getInstanceReceiver());
1401     break;
1402 
1403   case ObjCMessageExpr::Class:
1404     Record.AddTypeSourceInfo(E->getClassReceiverTypeInfo());
1405     break;
1406 
1407   case ObjCMessageExpr::SuperClass:
1408   case ObjCMessageExpr::SuperInstance:
1409     Record.AddTypeRef(E->getSuperType());
1410     Record.AddSourceLocation(E->getSuperLoc());
1411     break;
1412   }
1413 
1414   if (E->getMethodDecl()) {
1415     Record.push_back(1);
1416     Record.AddDeclRef(E->getMethodDecl());
1417   } else {
1418     Record.push_back(0);
1419     Record.AddSelectorRef(E->getSelector());
1420   }
1421 
1422   Record.AddSourceLocation(E->getLeftLoc());
1423   Record.AddSourceLocation(E->getRightLoc());
1424 
1425   for (CallExpr::arg_iterator Arg = E->arg_begin(), ArgEnd = E->arg_end();
1426        Arg != ArgEnd; ++Arg)
1427     Record.AddStmt(*Arg);
1428 
1429   SourceLocation *Locs = E->getStoredSelLocs();
1430   for (unsigned i = 0, e = E->getNumStoredSelLocs(); i != e; ++i)
1431     Record.AddSourceLocation(Locs[i]);
1432 
1433   Code = serialization::EXPR_OBJC_MESSAGE_EXPR;
1434 }
1435 
1436 void ASTStmtWriter::VisitObjCForCollectionStmt(ObjCForCollectionStmt *S) {
1437   VisitStmt(S);
1438   Record.AddStmt(S->getElement());
1439   Record.AddStmt(S->getCollection());
1440   Record.AddStmt(S->getBody());
1441   Record.AddSourceLocation(S->getForLoc());
1442   Record.AddSourceLocation(S->getRParenLoc());
1443   Code = serialization::STMT_OBJC_FOR_COLLECTION;
1444 }
1445 
1446 void ASTStmtWriter::VisitObjCAtCatchStmt(ObjCAtCatchStmt *S) {
1447   VisitStmt(S);
1448   Record.AddStmt(S->getCatchBody());
1449   Record.AddDeclRef(S->getCatchParamDecl());
1450   Record.AddSourceLocation(S->getAtCatchLoc());
1451   Record.AddSourceLocation(S->getRParenLoc());
1452   Code = serialization::STMT_OBJC_CATCH;
1453 }
1454 
1455 void ASTStmtWriter::VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *S) {
1456   VisitStmt(S);
1457   Record.AddStmt(S->getFinallyBody());
1458   Record.AddSourceLocation(S->getAtFinallyLoc());
1459   Code = serialization::STMT_OBJC_FINALLY;
1460 }
1461 
1462 void ASTStmtWriter::VisitObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S) {
1463   VisitStmt(S); // FIXME: no test coverage.
1464   Record.AddStmt(S->getSubStmt());
1465   Record.AddSourceLocation(S->getAtLoc());
1466   Code = serialization::STMT_OBJC_AUTORELEASE_POOL;
1467 }
1468 
1469 void ASTStmtWriter::VisitObjCAtTryStmt(ObjCAtTryStmt *S) {
1470   VisitStmt(S);
1471   Record.push_back(S->getNumCatchStmts());
1472   Record.push_back(S->getFinallyStmt() != nullptr);
1473   Record.AddStmt(S->getTryBody());
1474   for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; ++I)
1475     Record.AddStmt(S->getCatchStmt(I));
1476   if (S->getFinallyStmt())
1477     Record.AddStmt(S->getFinallyStmt());
1478   Record.AddSourceLocation(S->getAtTryLoc());
1479   Code = serialization::STMT_OBJC_AT_TRY;
1480 }
1481 
1482 void ASTStmtWriter::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
1483   VisitStmt(S); // FIXME: no test coverage.
1484   Record.AddStmt(S->getSynchExpr());
1485   Record.AddStmt(S->getSynchBody());
1486   Record.AddSourceLocation(S->getAtSynchronizedLoc());
1487   Code = serialization::STMT_OBJC_AT_SYNCHRONIZED;
1488 }
1489 
1490 void ASTStmtWriter::VisitObjCAtThrowStmt(ObjCAtThrowStmt *S) {
1491   VisitStmt(S); // FIXME: no test coverage.
1492   Record.AddStmt(S->getThrowExpr());
1493   Record.AddSourceLocation(S->getThrowLoc());
1494   Code = serialization::STMT_OBJC_AT_THROW;
1495 }
1496 
1497 void ASTStmtWriter::VisitObjCBoolLiteralExpr(ObjCBoolLiteralExpr *E) {
1498   VisitExpr(E);
1499   Record.push_back(E->getValue());
1500   Record.AddSourceLocation(E->getLocation());
1501   Code = serialization::EXPR_OBJC_BOOL_LITERAL;
1502 }
1503 
1504 void ASTStmtWriter::VisitObjCAvailabilityCheckExpr(ObjCAvailabilityCheckExpr *E) {
1505   VisitExpr(E);
1506   Record.AddSourceRange(E->getSourceRange());
1507   Record.AddVersionTuple(E->getVersion());
1508   Code = serialization::EXPR_OBJC_AVAILABILITY_CHECK;
1509 }
1510 
1511 //===----------------------------------------------------------------------===//
1512 // C++ Expressions and Statements.
1513 //===----------------------------------------------------------------------===//
1514 
1515 void ASTStmtWriter::VisitCXXCatchStmt(CXXCatchStmt *S) {
1516   VisitStmt(S);
1517   Record.AddSourceLocation(S->getCatchLoc());
1518   Record.AddDeclRef(S->getExceptionDecl());
1519   Record.AddStmt(S->getHandlerBlock());
1520   Code = serialization::STMT_CXX_CATCH;
1521 }
1522 
1523 void ASTStmtWriter::VisitCXXTryStmt(CXXTryStmt *S) {
1524   VisitStmt(S);
1525   Record.push_back(S->getNumHandlers());
1526   Record.AddSourceLocation(S->getTryLoc());
1527   Record.AddStmt(S->getTryBlock());
1528   for (unsigned i = 0, e = S->getNumHandlers(); i != e; ++i)
1529     Record.AddStmt(S->getHandler(i));
1530   Code = serialization::STMT_CXX_TRY;
1531 }
1532 
1533 void ASTStmtWriter::VisitCXXForRangeStmt(CXXForRangeStmt *S) {
1534   VisitStmt(S);
1535   Record.AddSourceLocation(S->getForLoc());
1536   Record.AddSourceLocation(S->getCoawaitLoc());
1537   Record.AddSourceLocation(S->getColonLoc());
1538   Record.AddSourceLocation(S->getRParenLoc());
1539   Record.AddStmt(S->getInit());
1540   Record.AddStmt(S->getRangeStmt());
1541   Record.AddStmt(S->getBeginStmt());
1542   Record.AddStmt(S->getEndStmt());
1543   Record.AddStmt(S->getCond());
1544   Record.AddStmt(S->getInc());
1545   Record.AddStmt(S->getLoopVarStmt());
1546   Record.AddStmt(S->getBody());
1547   Code = serialization::STMT_CXX_FOR_RANGE;
1548 }
1549 
1550 void ASTStmtWriter::VisitMSDependentExistsStmt(MSDependentExistsStmt *S) {
1551   VisitStmt(S);
1552   Record.AddSourceLocation(S->getKeywordLoc());
1553   Record.push_back(S->isIfExists());
1554   Record.AddNestedNameSpecifierLoc(S->getQualifierLoc());
1555   Record.AddDeclarationNameInfo(S->getNameInfo());
1556   Record.AddStmt(S->getSubStmt());
1557   Code = serialization::STMT_MS_DEPENDENT_EXISTS;
1558 }
1559 
1560 void ASTStmtWriter::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *E) {
1561   VisitCallExpr(E);
1562   Record.push_back(E->getOperator());
1563   Record.AddSourceRange(E->Range);
1564   Code = serialization::EXPR_CXX_OPERATOR_CALL;
1565 }
1566 
1567 void ASTStmtWriter::VisitCXXMemberCallExpr(CXXMemberCallExpr *E) {
1568   VisitCallExpr(E);
1569   Code = serialization::EXPR_CXX_MEMBER_CALL;
1570 }
1571 
1572 void ASTStmtWriter::VisitCXXRewrittenBinaryOperator(
1573     CXXRewrittenBinaryOperator *E) {
1574   VisitExpr(E);
1575   Record.push_back(E->isReversed());
1576   Record.AddStmt(E->getSemanticForm());
1577   Code = serialization::EXPR_CXX_REWRITTEN_BINARY_OPERATOR;
1578 }
1579 
1580 void ASTStmtWriter::VisitCXXConstructExpr(CXXConstructExpr *E) {
1581   VisitExpr(E);
1582 
1583   Record.push_back(E->getNumArgs());
1584   Record.push_back(E->isElidable());
1585   Record.push_back(E->hadMultipleCandidates());
1586   Record.push_back(E->isListInitialization());
1587   Record.push_back(E->isStdInitListInitialization());
1588   Record.push_back(E->requiresZeroInitialization());
1589   Record.push_back(E->getConstructionKind()); // FIXME: stable encoding
1590   Record.AddSourceLocation(E->getLocation());
1591   Record.AddDeclRef(E->getConstructor());
1592   Record.AddSourceRange(E->getParenOrBraceRange());
1593 
1594   for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
1595     Record.AddStmt(E->getArg(I));
1596 
1597   Code = serialization::EXPR_CXX_CONSTRUCT;
1598 }
1599 
1600 void ASTStmtWriter::VisitCXXInheritedCtorInitExpr(CXXInheritedCtorInitExpr *E) {
1601   VisitExpr(E);
1602   Record.AddDeclRef(E->getConstructor());
1603   Record.AddSourceLocation(E->getLocation());
1604   Record.push_back(E->constructsVBase());
1605   Record.push_back(E->inheritedFromVBase());
1606   Code = serialization::EXPR_CXX_INHERITED_CTOR_INIT;
1607 }
1608 
1609 void ASTStmtWriter::VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *E) {
1610   VisitCXXConstructExpr(E);
1611   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1612   Code = serialization::EXPR_CXX_TEMPORARY_OBJECT;
1613 }
1614 
1615 void ASTStmtWriter::VisitLambdaExpr(LambdaExpr *E) {
1616   VisitExpr(E);
1617   Record.push_back(E->LambdaExprBits.NumCaptures);
1618   Record.AddSourceRange(E->IntroducerRange);
1619   Record.push_back(E->LambdaExprBits.CaptureDefault); // FIXME: stable encoding
1620   Record.AddSourceLocation(E->CaptureDefaultLoc);
1621   Record.push_back(E->LambdaExprBits.ExplicitParams);
1622   Record.push_back(E->LambdaExprBits.ExplicitResultType);
1623   Record.AddSourceLocation(E->ClosingBrace);
1624 
1625   // Add capture initializers.
1626   for (LambdaExpr::capture_init_iterator C = E->capture_init_begin(),
1627                                       CEnd = E->capture_init_end();
1628        C != CEnd; ++C) {
1629     Record.AddStmt(*C);
1630   }
1631 
1632   // Don't serialize the body. It belongs to the call operator declaration.
1633   // LambdaExpr only stores a copy of the Stmt *.
1634 
1635   Code = serialization::EXPR_LAMBDA;
1636 }
1637 
1638 void ASTStmtWriter::VisitCXXStdInitializerListExpr(CXXStdInitializerListExpr *E) {
1639   VisitExpr(E);
1640   Record.AddStmt(E->getSubExpr());
1641   Code = serialization::EXPR_CXX_STD_INITIALIZER_LIST;
1642 }
1643 
1644 void ASTStmtWriter::VisitCXXNamedCastExpr(CXXNamedCastExpr *E) {
1645   VisitExplicitCastExpr(E);
1646   Record.AddSourceRange(SourceRange(E->getOperatorLoc(), E->getRParenLoc()));
1647   Record.AddSourceRange(E->getAngleBrackets());
1648 }
1649 
1650 void ASTStmtWriter::VisitCXXStaticCastExpr(CXXStaticCastExpr *E) {
1651   VisitCXXNamedCastExpr(E);
1652   Code = serialization::EXPR_CXX_STATIC_CAST;
1653 }
1654 
1655 void ASTStmtWriter::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *E) {
1656   VisitCXXNamedCastExpr(E);
1657   Code = serialization::EXPR_CXX_DYNAMIC_CAST;
1658 }
1659 
1660 void ASTStmtWriter::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *E) {
1661   VisitCXXNamedCastExpr(E);
1662   Code = serialization::EXPR_CXX_REINTERPRET_CAST;
1663 }
1664 
1665 void ASTStmtWriter::VisitCXXConstCastExpr(CXXConstCastExpr *E) {
1666   VisitCXXNamedCastExpr(E);
1667   Code = serialization::EXPR_CXX_CONST_CAST;
1668 }
1669 
1670 void ASTStmtWriter::VisitCXXAddrspaceCastExpr(CXXAddrspaceCastExpr *E) {
1671   VisitCXXNamedCastExpr(E);
1672   Code = serialization::EXPR_CXX_ADDRSPACE_CAST;
1673 }
1674 
1675 void ASTStmtWriter::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *E) {
1676   VisitExplicitCastExpr(E);
1677   Record.AddSourceLocation(E->getLParenLoc());
1678   Record.AddSourceLocation(E->getRParenLoc());
1679   Code = serialization::EXPR_CXX_FUNCTIONAL_CAST;
1680 }
1681 
1682 void ASTStmtWriter::VisitBuiltinBitCastExpr(BuiltinBitCastExpr *E) {
1683   VisitExplicitCastExpr(E);
1684   Record.AddSourceLocation(E->getBeginLoc());
1685   Record.AddSourceLocation(E->getEndLoc());
1686   Code = serialization::EXPR_BUILTIN_BIT_CAST;
1687 }
1688 
1689 void ASTStmtWriter::VisitUserDefinedLiteral(UserDefinedLiteral *E) {
1690   VisitCallExpr(E);
1691   Record.AddSourceLocation(E->UDSuffixLoc);
1692   Code = serialization::EXPR_USER_DEFINED_LITERAL;
1693 }
1694 
1695 void ASTStmtWriter::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *E) {
1696   VisitExpr(E);
1697   Record.push_back(E->getValue());
1698   Record.AddSourceLocation(E->getLocation());
1699   Code = serialization::EXPR_CXX_BOOL_LITERAL;
1700 }
1701 
1702 void ASTStmtWriter::VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *E) {
1703   VisitExpr(E);
1704   Record.AddSourceLocation(E->getLocation());
1705   Code = serialization::EXPR_CXX_NULL_PTR_LITERAL;
1706 }
1707 
1708 void ASTStmtWriter::VisitCXXTypeidExpr(CXXTypeidExpr *E) {
1709   VisitExpr(E);
1710   Record.AddSourceRange(E->getSourceRange());
1711   if (E->isTypeOperand()) {
1712     Record.AddTypeSourceInfo(E->getTypeOperandSourceInfo());
1713     Code = serialization::EXPR_CXX_TYPEID_TYPE;
1714   } else {
1715     Record.AddStmt(E->getExprOperand());
1716     Code = serialization::EXPR_CXX_TYPEID_EXPR;
1717   }
1718 }
1719 
1720 void ASTStmtWriter::VisitCXXThisExpr(CXXThisExpr *E) {
1721   VisitExpr(E);
1722   Record.AddSourceLocation(E->getLocation());
1723   Record.push_back(E->isImplicit());
1724   Code = serialization::EXPR_CXX_THIS;
1725 }
1726 
1727 void ASTStmtWriter::VisitCXXThrowExpr(CXXThrowExpr *E) {
1728   VisitExpr(E);
1729   Record.AddSourceLocation(E->getThrowLoc());
1730   Record.AddStmt(E->getSubExpr());
1731   Record.push_back(E->isThrownVariableInScope());
1732   Code = serialization::EXPR_CXX_THROW;
1733 }
1734 
1735 void ASTStmtWriter::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *E) {
1736   VisitExpr(E);
1737   Record.AddDeclRef(E->getParam());
1738   Record.AddDeclRef(cast_or_null<Decl>(E->getUsedContext()));
1739   Record.AddSourceLocation(E->getUsedLocation());
1740   Code = serialization::EXPR_CXX_DEFAULT_ARG;
1741 }
1742 
1743 void ASTStmtWriter::VisitCXXDefaultInitExpr(CXXDefaultInitExpr *E) {
1744   VisitExpr(E);
1745   Record.AddDeclRef(E->getField());
1746   Record.AddDeclRef(cast_or_null<Decl>(E->getUsedContext()));
1747   Record.AddSourceLocation(E->getExprLoc());
1748   Code = serialization::EXPR_CXX_DEFAULT_INIT;
1749 }
1750 
1751 void ASTStmtWriter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) {
1752   VisitExpr(E);
1753   Record.AddCXXTemporary(E->getTemporary());
1754   Record.AddStmt(E->getSubExpr());
1755   Code = serialization::EXPR_CXX_BIND_TEMPORARY;
1756 }
1757 
1758 void ASTStmtWriter::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) {
1759   VisitExpr(E);
1760   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1761   Record.AddSourceLocation(E->getRParenLoc());
1762   Code = serialization::EXPR_CXX_SCALAR_VALUE_INIT;
1763 }
1764 
1765 void ASTStmtWriter::VisitCXXNewExpr(CXXNewExpr *E) {
1766   VisitExpr(E);
1767 
1768   Record.push_back(E->isArray());
1769   Record.push_back(E->hasInitializer());
1770   Record.push_back(E->getNumPlacementArgs());
1771   Record.push_back(E->isParenTypeId());
1772 
1773   Record.push_back(E->isGlobalNew());
1774   Record.push_back(E->passAlignment());
1775   Record.push_back(E->doesUsualArrayDeleteWantSize());
1776   Record.push_back(E->CXXNewExprBits.StoredInitializationStyle);
1777 
1778   Record.AddDeclRef(E->getOperatorNew());
1779   Record.AddDeclRef(E->getOperatorDelete());
1780   Record.AddTypeSourceInfo(E->getAllocatedTypeSourceInfo());
1781   if (E->isParenTypeId())
1782     Record.AddSourceRange(E->getTypeIdParens());
1783   Record.AddSourceRange(E->getSourceRange());
1784   Record.AddSourceRange(E->getDirectInitRange());
1785 
1786   for (CXXNewExpr::arg_iterator I = E->raw_arg_begin(), N = E->raw_arg_end();
1787        I != N; ++I)
1788     Record.AddStmt(*I);
1789 
1790   Code = serialization::EXPR_CXX_NEW;
1791 }
1792 
1793 void ASTStmtWriter::VisitCXXDeleteExpr(CXXDeleteExpr *E) {
1794   VisitExpr(E);
1795   Record.push_back(E->isGlobalDelete());
1796   Record.push_back(E->isArrayForm());
1797   Record.push_back(E->isArrayFormAsWritten());
1798   Record.push_back(E->doesUsualArrayDeleteWantSize());
1799   Record.AddDeclRef(E->getOperatorDelete());
1800   Record.AddStmt(E->getArgument());
1801   Record.AddSourceLocation(E->getBeginLoc());
1802 
1803   Code = serialization::EXPR_CXX_DELETE;
1804 }
1805 
1806 void ASTStmtWriter::VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E) {
1807   VisitExpr(E);
1808 
1809   Record.AddStmt(E->getBase());
1810   Record.push_back(E->isArrow());
1811   Record.AddSourceLocation(E->getOperatorLoc());
1812   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1813   Record.AddTypeSourceInfo(E->getScopeTypeInfo());
1814   Record.AddSourceLocation(E->getColonColonLoc());
1815   Record.AddSourceLocation(E->getTildeLoc());
1816 
1817   // PseudoDestructorTypeStorage.
1818   Record.AddIdentifierRef(E->getDestroyedTypeIdentifier());
1819   if (E->getDestroyedTypeIdentifier())
1820     Record.AddSourceLocation(E->getDestroyedTypeLoc());
1821   else
1822     Record.AddTypeSourceInfo(E->getDestroyedTypeInfo());
1823 
1824   Code = serialization::EXPR_CXX_PSEUDO_DESTRUCTOR;
1825 }
1826 
1827 void ASTStmtWriter::VisitExprWithCleanups(ExprWithCleanups *E) {
1828   VisitExpr(E);
1829   Record.push_back(E->getNumObjects());
1830   for (auto &Obj : E->getObjects()) {
1831     if (auto *BD = Obj.dyn_cast<BlockDecl *>()) {
1832       Record.push_back(serialization::COK_Block);
1833       Record.AddDeclRef(BD);
1834     } else if (auto *CLE = Obj.dyn_cast<CompoundLiteralExpr *>()) {
1835       Record.push_back(serialization::COK_CompoundLiteral);
1836       Record.AddStmt(CLE);
1837     }
1838   }
1839 
1840   Record.push_back(E->cleanupsHaveSideEffects());
1841   Record.AddStmt(E->getSubExpr());
1842   Code = serialization::EXPR_EXPR_WITH_CLEANUPS;
1843 }
1844 
1845 void ASTStmtWriter::VisitCXXDependentScopeMemberExpr(
1846     CXXDependentScopeMemberExpr *E) {
1847   VisitExpr(E);
1848 
1849   // Don't emit anything here (or if you do you will have to update
1850   // the corresponding deserialization function).
1851 
1852   Record.push_back(E->hasTemplateKWAndArgsInfo());
1853   Record.push_back(E->getNumTemplateArgs());
1854   Record.push_back(E->hasFirstQualifierFoundInScope());
1855 
1856   if (E->hasTemplateKWAndArgsInfo()) {
1857     const ASTTemplateKWAndArgsInfo &ArgInfo =
1858         *E->getTrailingObjects<ASTTemplateKWAndArgsInfo>();
1859     AddTemplateKWAndArgsInfo(ArgInfo,
1860                              E->getTrailingObjects<TemplateArgumentLoc>());
1861   }
1862 
1863   Record.push_back(E->isArrow());
1864   Record.AddSourceLocation(E->getOperatorLoc());
1865   Record.AddTypeRef(E->getBaseType());
1866   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1867   if (!E->isImplicitAccess())
1868     Record.AddStmt(E->getBase());
1869   else
1870     Record.AddStmt(nullptr);
1871 
1872   if (E->hasFirstQualifierFoundInScope())
1873     Record.AddDeclRef(E->getFirstQualifierFoundInScope());
1874 
1875   Record.AddDeclarationNameInfo(E->MemberNameInfo);
1876   Code = serialization::EXPR_CXX_DEPENDENT_SCOPE_MEMBER;
1877 }
1878 
1879 void
1880 ASTStmtWriter::VisitDependentScopeDeclRefExpr(DependentScopeDeclRefExpr *E) {
1881   VisitExpr(E);
1882 
1883   // Don't emit anything here, HasTemplateKWAndArgsInfo must be
1884   // emitted first.
1885 
1886   Record.push_back(E->DependentScopeDeclRefExprBits.HasTemplateKWAndArgsInfo);
1887   if (E->DependentScopeDeclRefExprBits.HasTemplateKWAndArgsInfo) {
1888     const ASTTemplateKWAndArgsInfo &ArgInfo =
1889         *E->getTrailingObjects<ASTTemplateKWAndArgsInfo>();
1890     Record.push_back(ArgInfo.NumTemplateArgs);
1891     AddTemplateKWAndArgsInfo(ArgInfo,
1892                              E->getTrailingObjects<TemplateArgumentLoc>());
1893   }
1894 
1895   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1896   Record.AddDeclarationNameInfo(E->NameInfo);
1897   Code = serialization::EXPR_CXX_DEPENDENT_SCOPE_DECL_REF;
1898 }
1899 
1900 void
1901 ASTStmtWriter::VisitCXXUnresolvedConstructExpr(CXXUnresolvedConstructExpr *E) {
1902   VisitExpr(E);
1903   Record.push_back(E->arg_size());
1904   for (CXXUnresolvedConstructExpr::arg_iterator
1905          ArgI = E->arg_begin(), ArgE = E->arg_end(); ArgI != ArgE; ++ArgI)
1906     Record.AddStmt(*ArgI);
1907   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1908   Record.AddSourceLocation(E->getLParenLoc());
1909   Record.AddSourceLocation(E->getRParenLoc());
1910   Code = serialization::EXPR_CXX_UNRESOLVED_CONSTRUCT;
1911 }
1912 
1913 void ASTStmtWriter::VisitOverloadExpr(OverloadExpr *E) {
1914   VisitExpr(E);
1915 
1916   Record.push_back(E->getNumDecls());
1917   Record.push_back(E->hasTemplateKWAndArgsInfo());
1918   if (E->hasTemplateKWAndArgsInfo()) {
1919     const ASTTemplateKWAndArgsInfo &ArgInfo =
1920         *E->getTrailingASTTemplateKWAndArgsInfo();
1921     Record.push_back(ArgInfo.NumTemplateArgs);
1922     AddTemplateKWAndArgsInfo(ArgInfo, E->getTrailingTemplateArgumentLoc());
1923   }
1924 
1925   for (OverloadExpr::decls_iterator OvI = E->decls_begin(),
1926                                     OvE = E->decls_end();
1927        OvI != OvE; ++OvI) {
1928     Record.AddDeclRef(OvI.getDecl());
1929     Record.push_back(OvI.getAccess());
1930   }
1931 
1932   Record.AddDeclarationNameInfo(E->getNameInfo());
1933   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1934 }
1935 
1936 void ASTStmtWriter::VisitUnresolvedMemberExpr(UnresolvedMemberExpr *E) {
1937   VisitOverloadExpr(E);
1938   Record.push_back(E->isArrow());
1939   Record.push_back(E->hasUnresolvedUsing());
1940   Record.AddStmt(!E->isImplicitAccess() ? E->getBase() : nullptr);
1941   Record.AddTypeRef(E->getBaseType());
1942   Record.AddSourceLocation(E->getOperatorLoc());
1943   Code = serialization::EXPR_CXX_UNRESOLVED_MEMBER;
1944 }
1945 
1946 void ASTStmtWriter::VisitUnresolvedLookupExpr(UnresolvedLookupExpr *E) {
1947   VisitOverloadExpr(E);
1948   Record.push_back(E->requiresADL());
1949   Record.push_back(E->isOverloaded());
1950   Record.AddDeclRef(E->getNamingClass());
1951   Code = serialization::EXPR_CXX_UNRESOLVED_LOOKUP;
1952 }
1953 
1954 void ASTStmtWriter::VisitTypeTraitExpr(TypeTraitExpr *E) {
1955   VisitExpr(E);
1956   Record.push_back(E->TypeTraitExprBits.NumArgs);
1957   Record.push_back(E->TypeTraitExprBits.Kind); // FIXME: Stable encoding
1958   Record.push_back(E->TypeTraitExprBits.Value);
1959   Record.AddSourceRange(E->getSourceRange());
1960   for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
1961     Record.AddTypeSourceInfo(E->getArg(I));
1962   Code = serialization::EXPR_TYPE_TRAIT;
1963 }
1964 
1965 void ASTStmtWriter::VisitArrayTypeTraitExpr(ArrayTypeTraitExpr *E) {
1966   VisitExpr(E);
1967   Record.push_back(E->getTrait());
1968   Record.push_back(E->getValue());
1969   Record.AddSourceRange(E->getSourceRange());
1970   Record.AddTypeSourceInfo(E->getQueriedTypeSourceInfo());
1971   Record.AddStmt(E->getDimensionExpression());
1972   Code = serialization::EXPR_ARRAY_TYPE_TRAIT;
1973 }
1974 
1975 void ASTStmtWriter::VisitExpressionTraitExpr(ExpressionTraitExpr *E) {
1976   VisitExpr(E);
1977   Record.push_back(E->getTrait());
1978   Record.push_back(E->getValue());
1979   Record.AddSourceRange(E->getSourceRange());
1980   Record.AddStmt(E->getQueriedExpression());
1981   Code = serialization::EXPR_CXX_EXPRESSION_TRAIT;
1982 }
1983 
1984 void ASTStmtWriter::VisitCXXNoexceptExpr(CXXNoexceptExpr *E) {
1985   VisitExpr(E);
1986   Record.push_back(E->getValue());
1987   Record.AddSourceRange(E->getSourceRange());
1988   Record.AddStmt(E->getOperand());
1989   Code = serialization::EXPR_CXX_NOEXCEPT;
1990 }
1991 
1992 void ASTStmtWriter::VisitPackExpansionExpr(PackExpansionExpr *E) {
1993   VisitExpr(E);
1994   Record.AddSourceLocation(E->getEllipsisLoc());
1995   Record.push_back(E->NumExpansions);
1996   Record.AddStmt(E->getPattern());
1997   Code = serialization::EXPR_PACK_EXPANSION;
1998 }
1999 
2000 void ASTStmtWriter::VisitSizeOfPackExpr(SizeOfPackExpr *E) {
2001   VisitExpr(E);
2002   Record.push_back(E->isPartiallySubstituted() ? E->getPartialArguments().size()
2003                                                : 0);
2004   Record.AddSourceLocation(E->OperatorLoc);
2005   Record.AddSourceLocation(E->PackLoc);
2006   Record.AddSourceLocation(E->RParenLoc);
2007   Record.AddDeclRef(E->Pack);
2008   if (E->isPartiallySubstituted()) {
2009     for (const auto &TA : E->getPartialArguments())
2010       Record.AddTemplateArgument(TA);
2011   } else if (!E->isValueDependent()) {
2012     Record.push_back(E->getPackLength());
2013   }
2014   Code = serialization::EXPR_SIZEOF_PACK;
2015 }
2016 
2017 void ASTStmtWriter::VisitSubstNonTypeTemplateParmExpr(
2018                                               SubstNonTypeTemplateParmExpr *E) {
2019   VisitExpr(E);
2020   Record.AddDeclRef(E->getParameter());
2021   Record.AddSourceLocation(E->getNameLoc());
2022   Record.AddStmt(E->getReplacement());
2023   Code = serialization::EXPR_SUBST_NON_TYPE_TEMPLATE_PARM;
2024 }
2025 
2026 void ASTStmtWriter::VisitSubstNonTypeTemplateParmPackExpr(
2027                                           SubstNonTypeTemplateParmPackExpr *E) {
2028   VisitExpr(E);
2029   Record.AddDeclRef(E->getParameterPack());
2030   Record.AddTemplateArgument(E->getArgumentPack());
2031   Record.AddSourceLocation(E->getParameterPackLocation());
2032   Code = serialization::EXPR_SUBST_NON_TYPE_TEMPLATE_PARM_PACK;
2033 }
2034 
2035 void ASTStmtWriter::VisitFunctionParmPackExpr(FunctionParmPackExpr *E) {
2036   VisitExpr(E);
2037   Record.push_back(E->getNumExpansions());
2038   Record.AddDeclRef(E->getParameterPack());
2039   Record.AddSourceLocation(E->getParameterPackLocation());
2040   for (FunctionParmPackExpr::iterator I = E->begin(), End = E->end();
2041        I != End; ++I)
2042     Record.AddDeclRef(*I);
2043   Code = serialization::EXPR_FUNCTION_PARM_PACK;
2044 }
2045 
2046 void ASTStmtWriter::VisitMaterializeTemporaryExpr(MaterializeTemporaryExpr *E) {
2047   VisitExpr(E);
2048   Record.push_back(static_cast<bool>(E->getLifetimeExtendedTemporaryDecl()));
2049   if (E->getLifetimeExtendedTemporaryDecl())
2050     Record.AddDeclRef(E->getLifetimeExtendedTemporaryDecl());
2051   else
2052     Record.AddStmt(E->getSubExpr());
2053   Code = serialization::EXPR_MATERIALIZE_TEMPORARY;
2054 }
2055 
2056 void ASTStmtWriter::VisitCXXFoldExpr(CXXFoldExpr *E) {
2057   VisitExpr(E);
2058   Record.AddSourceLocation(E->LParenLoc);
2059   Record.AddSourceLocation(E->EllipsisLoc);
2060   Record.AddSourceLocation(E->RParenLoc);
2061   Record.push_back(E->NumExpansions);
2062   Record.AddStmt(E->SubExprs[0]);
2063   Record.AddStmt(E->SubExprs[1]);
2064   Record.AddStmt(E->SubExprs[2]);
2065   Record.push_back(E->Opcode);
2066   Code = serialization::EXPR_CXX_FOLD;
2067 }
2068 
2069 void ASTStmtWriter::VisitOpaqueValueExpr(OpaqueValueExpr *E) {
2070   VisitExpr(E);
2071   Record.AddStmt(E->getSourceExpr());
2072   Record.AddSourceLocation(E->getLocation());
2073   Record.push_back(E->isUnique());
2074   Code = serialization::EXPR_OPAQUE_VALUE;
2075 }
2076 
2077 void ASTStmtWriter::VisitTypoExpr(TypoExpr *E) {
2078   VisitExpr(E);
2079   // TODO: Figure out sane writer behavior for a TypoExpr, if necessary
2080   llvm_unreachable("Cannot write TypoExpr nodes");
2081 }
2082 
2083 //===----------------------------------------------------------------------===//
2084 // CUDA Expressions and Statements.
2085 //===----------------------------------------------------------------------===//
2086 
2087 void ASTStmtWriter::VisitCUDAKernelCallExpr(CUDAKernelCallExpr *E) {
2088   VisitCallExpr(E);
2089   Record.AddStmt(E->getConfig());
2090   Code = serialization::EXPR_CUDA_KERNEL_CALL;
2091 }
2092 
2093 //===----------------------------------------------------------------------===//
2094 // OpenCL Expressions and Statements.
2095 //===----------------------------------------------------------------------===//
2096 void ASTStmtWriter::VisitAsTypeExpr(AsTypeExpr *E) {
2097   VisitExpr(E);
2098   Record.AddSourceLocation(E->getBuiltinLoc());
2099   Record.AddSourceLocation(E->getRParenLoc());
2100   Record.AddStmt(E->getSrcExpr());
2101   Code = serialization::EXPR_ASTYPE;
2102 }
2103 
2104 //===----------------------------------------------------------------------===//
2105 // Microsoft Expressions and Statements.
2106 //===----------------------------------------------------------------------===//
2107 void ASTStmtWriter::VisitMSPropertyRefExpr(MSPropertyRefExpr *E) {
2108   VisitExpr(E);
2109   Record.push_back(E->isArrow());
2110   Record.AddStmt(E->getBaseExpr());
2111   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
2112   Record.AddSourceLocation(E->getMemberLoc());
2113   Record.AddDeclRef(E->getPropertyDecl());
2114   Code = serialization::EXPR_CXX_PROPERTY_REF_EXPR;
2115 }
2116 
2117 void ASTStmtWriter::VisitMSPropertySubscriptExpr(MSPropertySubscriptExpr *E) {
2118   VisitExpr(E);
2119   Record.AddStmt(E->getBase());
2120   Record.AddStmt(E->getIdx());
2121   Record.AddSourceLocation(E->getRBracketLoc());
2122   Code = serialization::EXPR_CXX_PROPERTY_SUBSCRIPT_EXPR;
2123 }
2124 
2125 void ASTStmtWriter::VisitCXXUuidofExpr(CXXUuidofExpr *E) {
2126   VisitExpr(E);
2127   Record.AddSourceRange(E->getSourceRange());
2128   Record.AddDeclRef(E->getGuidDecl());
2129   if (E->isTypeOperand()) {
2130     Record.AddTypeSourceInfo(E->getTypeOperandSourceInfo());
2131     Code = serialization::EXPR_CXX_UUIDOF_TYPE;
2132   } else {
2133     Record.AddStmt(E->getExprOperand());
2134     Code = serialization::EXPR_CXX_UUIDOF_EXPR;
2135   }
2136 }
2137 
2138 void ASTStmtWriter::VisitSEHExceptStmt(SEHExceptStmt *S) {
2139   VisitStmt(S);
2140   Record.AddSourceLocation(S->getExceptLoc());
2141   Record.AddStmt(S->getFilterExpr());
2142   Record.AddStmt(S->getBlock());
2143   Code = serialization::STMT_SEH_EXCEPT;
2144 }
2145 
2146 void ASTStmtWriter::VisitSEHFinallyStmt(SEHFinallyStmt *S) {
2147   VisitStmt(S);
2148   Record.AddSourceLocation(S->getFinallyLoc());
2149   Record.AddStmt(S->getBlock());
2150   Code = serialization::STMT_SEH_FINALLY;
2151 }
2152 
2153 void ASTStmtWriter::VisitSEHTryStmt(SEHTryStmt *S) {
2154   VisitStmt(S);
2155   Record.push_back(S->getIsCXXTry());
2156   Record.AddSourceLocation(S->getTryLoc());
2157   Record.AddStmt(S->getTryBlock());
2158   Record.AddStmt(S->getHandler());
2159   Code = serialization::STMT_SEH_TRY;
2160 }
2161 
2162 void ASTStmtWriter::VisitSEHLeaveStmt(SEHLeaveStmt *S) {
2163   VisitStmt(S);
2164   Record.AddSourceLocation(S->getLeaveLoc());
2165   Code = serialization::STMT_SEH_LEAVE;
2166 }
2167 
2168 //===----------------------------------------------------------------------===//
2169 // OpenMP Directives.
2170 //===----------------------------------------------------------------------===//
2171 
2172 void ASTStmtWriter::VisitOMPExecutableDirective(OMPExecutableDirective *E) {
2173   Record.writeOMPChildren(E->Data);
2174   Record.AddSourceLocation(E->getBeginLoc());
2175   Record.AddSourceLocation(E->getEndLoc());
2176 }
2177 
2178 void ASTStmtWriter::VisitOMPLoopDirective(OMPLoopDirective *D) {
2179   VisitStmt(D);
2180   Record.writeUInt32(D->getCollapsedNumber());
2181   VisitOMPExecutableDirective(D);
2182 }
2183 
2184 void ASTStmtWriter::VisitOMPParallelDirective(OMPParallelDirective *D) {
2185   VisitStmt(D);
2186   VisitOMPExecutableDirective(D);
2187   Record.writeBool(D->hasCancel());
2188   Code = serialization::STMT_OMP_PARALLEL_DIRECTIVE;
2189 }
2190 
2191 void ASTStmtWriter::VisitOMPSimdDirective(OMPSimdDirective *D) {
2192   VisitOMPLoopDirective(D);
2193   Code = serialization::STMT_OMP_SIMD_DIRECTIVE;
2194 }
2195 
2196 void ASTStmtWriter::VisitOMPForDirective(OMPForDirective *D) {
2197   VisitOMPLoopDirective(D);
2198   Record.writeBool(D->hasCancel());
2199   Code = serialization::STMT_OMP_FOR_DIRECTIVE;
2200 }
2201 
2202 void ASTStmtWriter::VisitOMPForSimdDirective(OMPForSimdDirective *D) {
2203   VisitOMPLoopDirective(D);
2204   Code = serialization::STMT_OMP_FOR_SIMD_DIRECTIVE;
2205 }
2206 
2207 void ASTStmtWriter::VisitOMPSectionsDirective(OMPSectionsDirective *D) {
2208   VisitStmt(D);
2209   VisitOMPExecutableDirective(D);
2210   Record.writeBool(D->hasCancel());
2211   Code = serialization::STMT_OMP_SECTIONS_DIRECTIVE;
2212 }
2213 
2214 void ASTStmtWriter::VisitOMPSectionDirective(OMPSectionDirective *D) {
2215   VisitStmt(D);
2216   VisitOMPExecutableDirective(D);
2217   Record.writeBool(D->hasCancel());
2218   Code = serialization::STMT_OMP_SECTION_DIRECTIVE;
2219 }
2220 
2221 void ASTStmtWriter::VisitOMPSingleDirective(OMPSingleDirective *D) {
2222   VisitStmt(D);
2223   VisitOMPExecutableDirective(D);
2224   Code = serialization::STMT_OMP_SINGLE_DIRECTIVE;
2225 }
2226 
2227 void ASTStmtWriter::VisitOMPMasterDirective(OMPMasterDirective *D) {
2228   VisitStmt(D);
2229   VisitOMPExecutableDirective(D);
2230   Code = serialization::STMT_OMP_MASTER_DIRECTIVE;
2231 }
2232 
2233 void ASTStmtWriter::VisitOMPCriticalDirective(OMPCriticalDirective *D) {
2234   VisitStmt(D);
2235   VisitOMPExecutableDirective(D);
2236   Record.AddDeclarationNameInfo(D->getDirectiveName());
2237   Code = serialization::STMT_OMP_CRITICAL_DIRECTIVE;
2238 }
2239 
2240 void ASTStmtWriter::VisitOMPParallelForDirective(OMPParallelForDirective *D) {
2241   VisitOMPLoopDirective(D);
2242   Record.writeBool(D->hasCancel());
2243   Code = serialization::STMT_OMP_PARALLEL_FOR_DIRECTIVE;
2244 }
2245 
2246 void ASTStmtWriter::VisitOMPParallelForSimdDirective(
2247     OMPParallelForSimdDirective *D) {
2248   VisitOMPLoopDirective(D);
2249   Code = serialization::STMT_OMP_PARALLEL_FOR_SIMD_DIRECTIVE;
2250 }
2251 
2252 void ASTStmtWriter::VisitOMPParallelMasterDirective(
2253     OMPParallelMasterDirective *D) {
2254   VisitStmt(D);
2255   VisitOMPExecutableDirective(D);
2256   Code = serialization::STMT_OMP_PARALLEL_MASTER_DIRECTIVE;
2257 }
2258 
2259 void ASTStmtWriter::VisitOMPParallelSectionsDirective(
2260     OMPParallelSectionsDirective *D) {
2261   VisitStmt(D);
2262   VisitOMPExecutableDirective(D);
2263   Record.writeBool(D->hasCancel());
2264   Code = serialization::STMT_OMP_PARALLEL_SECTIONS_DIRECTIVE;
2265 }
2266 
2267 void ASTStmtWriter::VisitOMPTaskDirective(OMPTaskDirective *D) {
2268   VisitStmt(D);
2269   VisitOMPExecutableDirective(D);
2270   Record.writeBool(D->hasCancel());
2271   Code = serialization::STMT_OMP_TASK_DIRECTIVE;
2272 }
2273 
2274 void ASTStmtWriter::VisitOMPAtomicDirective(OMPAtomicDirective *D) {
2275   VisitStmt(D);
2276   VisitOMPExecutableDirective(D);
2277   Record.writeBool(D->isXLHSInRHSPart());
2278   Record.writeBool(D->isPostfixUpdate());
2279   Code = serialization::STMT_OMP_ATOMIC_DIRECTIVE;
2280 }
2281 
2282 void ASTStmtWriter::VisitOMPTargetDirective(OMPTargetDirective *D) {
2283   VisitStmt(D);
2284   VisitOMPExecutableDirective(D);
2285   Code = serialization::STMT_OMP_TARGET_DIRECTIVE;
2286 }
2287 
2288 void ASTStmtWriter::VisitOMPTargetDataDirective(OMPTargetDataDirective *D) {
2289   VisitStmt(D);
2290   VisitOMPExecutableDirective(D);
2291   Code = serialization::STMT_OMP_TARGET_DATA_DIRECTIVE;
2292 }
2293 
2294 void ASTStmtWriter::VisitOMPTargetEnterDataDirective(
2295     OMPTargetEnterDataDirective *D) {
2296   VisitStmt(D);
2297   VisitOMPExecutableDirective(D);
2298   Code = serialization::STMT_OMP_TARGET_ENTER_DATA_DIRECTIVE;
2299 }
2300 
2301 void ASTStmtWriter::VisitOMPTargetExitDataDirective(
2302     OMPTargetExitDataDirective *D) {
2303   VisitStmt(D);
2304   VisitOMPExecutableDirective(D);
2305   Code = serialization::STMT_OMP_TARGET_EXIT_DATA_DIRECTIVE;
2306 }
2307 
2308 void ASTStmtWriter::VisitOMPTargetParallelDirective(
2309     OMPTargetParallelDirective *D) {
2310   VisitStmt(D);
2311   VisitOMPExecutableDirective(D);
2312   Record.writeBool(D->hasCancel());
2313   Code = serialization::STMT_OMP_TARGET_PARALLEL_DIRECTIVE;
2314 }
2315 
2316 void ASTStmtWriter::VisitOMPTargetParallelForDirective(
2317     OMPTargetParallelForDirective *D) {
2318   VisitOMPLoopDirective(D);
2319   Record.writeBool(D->hasCancel());
2320   Code = serialization::STMT_OMP_TARGET_PARALLEL_FOR_DIRECTIVE;
2321 }
2322 
2323 void ASTStmtWriter::VisitOMPTaskyieldDirective(OMPTaskyieldDirective *D) {
2324   VisitStmt(D);
2325   VisitOMPExecutableDirective(D);
2326   Code = serialization::STMT_OMP_TASKYIELD_DIRECTIVE;
2327 }
2328 
2329 void ASTStmtWriter::VisitOMPBarrierDirective(OMPBarrierDirective *D) {
2330   VisitStmt(D);
2331   VisitOMPExecutableDirective(D);
2332   Code = serialization::STMT_OMP_BARRIER_DIRECTIVE;
2333 }
2334 
2335 void ASTStmtWriter::VisitOMPTaskwaitDirective(OMPTaskwaitDirective *D) {
2336   VisitStmt(D);
2337   VisitOMPExecutableDirective(D);
2338   Code = serialization::STMT_OMP_TASKWAIT_DIRECTIVE;
2339 }
2340 
2341 void ASTStmtWriter::VisitOMPTaskgroupDirective(OMPTaskgroupDirective *D) {
2342   VisitStmt(D);
2343   VisitOMPExecutableDirective(D);
2344   Code = serialization::STMT_OMP_TASKGROUP_DIRECTIVE;
2345 }
2346 
2347 void ASTStmtWriter::VisitOMPFlushDirective(OMPFlushDirective *D) {
2348   VisitStmt(D);
2349   VisitOMPExecutableDirective(D);
2350   Code = serialization::STMT_OMP_FLUSH_DIRECTIVE;
2351 }
2352 
2353 void ASTStmtWriter::VisitOMPDepobjDirective(OMPDepobjDirective *D) {
2354   VisitStmt(D);
2355   VisitOMPExecutableDirective(D);
2356   Code = serialization::STMT_OMP_DEPOBJ_DIRECTIVE;
2357 }
2358 
2359 void ASTStmtWriter::VisitOMPScanDirective(OMPScanDirective *D) {
2360   VisitStmt(D);
2361   VisitOMPExecutableDirective(D);
2362   Code = serialization::STMT_OMP_SCAN_DIRECTIVE;
2363 }
2364 
2365 void ASTStmtWriter::VisitOMPOrderedDirective(OMPOrderedDirective *D) {
2366   VisitStmt(D);
2367   VisitOMPExecutableDirective(D);
2368   Code = serialization::STMT_OMP_ORDERED_DIRECTIVE;
2369 }
2370 
2371 void ASTStmtWriter::VisitOMPTeamsDirective(OMPTeamsDirective *D) {
2372   VisitStmt(D);
2373   VisitOMPExecutableDirective(D);
2374   Code = serialization::STMT_OMP_TEAMS_DIRECTIVE;
2375 }
2376 
2377 void ASTStmtWriter::VisitOMPCancellationPointDirective(
2378     OMPCancellationPointDirective *D) {
2379   VisitStmt(D);
2380   VisitOMPExecutableDirective(D);
2381   Record.writeEnum(D->getCancelRegion());
2382   Code = serialization::STMT_OMP_CANCELLATION_POINT_DIRECTIVE;
2383 }
2384 
2385 void ASTStmtWriter::VisitOMPCancelDirective(OMPCancelDirective *D) {
2386   VisitStmt(D);
2387   VisitOMPExecutableDirective(D);
2388   Record.writeEnum(D->getCancelRegion());
2389   Code = serialization::STMT_OMP_CANCEL_DIRECTIVE;
2390 }
2391 
2392 void ASTStmtWriter::VisitOMPTaskLoopDirective(OMPTaskLoopDirective *D) {
2393   VisitOMPLoopDirective(D);
2394   Record.writeBool(D->hasCancel());
2395   Code = serialization::STMT_OMP_TASKLOOP_DIRECTIVE;
2396 }
2397 
2398 void ASTStmtWriter::VisitOMPTaskLoopSimdDirective(OMPTaskLoopSimdDirective *D) {
2399   VisitOMPLoopDirective(D);
2400   Code = serialization::STMT_OMP_TASKLOOP_SIMD_DIRECTIVE;
2401 }
2402 
2403 void ASTStmtWriter::VisitOMPMasterTaskLoopDirective(
2404     OMPMasterTaskLoopDirective *D) {
2405   VisitOMPLoopDirective(D);
2406   Record.writeBool(D->hasCancel());
2407   Code = serialization::STMT_OMP_MASTER_TASKLOOP_DIRECTIVE;
2408 }
2409 
2410 void ASTStmtWriter::VisitOMPMasterTaskLoopSimdDirective(
2411     OMPMasterTaskLoopSimdDirective *D) {
2412   VisitOMPLoopDirective(D);
2413   Code = serialization::STMT_OMP_MASTER_TASKLOOP_SIMD_DIRECTIVE;
2414 }
2415 
2416 void ASTStmtWriter::VisitOMPParallelMasterTaskLoopDirective(
2417     OMPParallelMasterTaskLoopDirective *D) {
2418   VisitOMPLoopDirective(D);
2419   Record.writeBool(D->hasCancel());
2420   Code = serialization::STMT_OMP_PARALLEL_MASTER_TASKLOOP_DIRECTIVE;
2421 }
2422 
2423 void ASTStmtWriter::VisitOMPParallelMasterTaskLoopSimdDirective(
2424     OMPParallelMasterTaskLoopSimdDirective *D) {
2425   VisitOMPLoopDirective(D);
2426   Code = serialization::STMT_OMP_PARALLEL_MASTER_TASKLOOP_SIMD_DIRECTIVE;
2427 }
2428 
2429 void ASTStmtWriter::VisitOMPDistributeDirective(OMPDistributeDirective *D) {
2430   VisitOMPLoopDirective(D);
2431   Code = serialization::STMT_OMP_DISTRIBUTE_DIRECTIVE;
2432 }
2433 
2434 void ASTStmtWriter::VisitOMPTargetUpdateDirective(OMPTargetUpdateDirective *D) {
2435   VisitStmt(D);
2436   VisitOMPExecutableDirective(D);
2437   Code = serialization::STMT_OMP_TARGET_UPDATE_DIRECTIVE;
2438 }
2439 
2440 void ASTStmtWriter::VisitOMPDistributeParallelForDirective(
2441     OMPDistributeParallelForDirective *D) {
2442   VisitOMPLoopDirective(D);
2443   Record.writeBool(D->hasCancel());
2444   Code = serialization::STMT_OMP_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE;
2445 }
2446 
2447 void ASTStmtWriter::VisitOMPDistributeParallelForSimdDirective(
2448     OMPDistributeParallelForSimdDirective *D) {
2449   VisitOMPLoopDirective(D);
2450   Code = serialization::STMT_OMP_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE;
2451 }
2452 
2453 void ASTStmtWriter::VisitOMPDistributeSimdDirective(
2454     OMPDistributeSimdDirective *D) {
2455   VisitOMPLoopDirective(D);
2456   Code = serialization::STMT_OMP_DISTRIBUTE_SIMD_DIRECTIVE;
2457 }
2458 
2459 void ASTStmtWriter::VisitOMPTargetParallelForSimdDirective(
2460     OMPTargetParallelForSimdDirective *D) {
2461   VisitOMPLoopDirective(D);
2462   Code = serialization::STMT_OMP_TARGET_PARALLEL_FOR_SIMD_DIRECTIVE;
2463 }
2464 
2465 void ASTStmtWriter::VisitOMPTargetSimdDirective(OMPTargetSimdDirective *D) {
2466   VisitOMPLoopDirective(D);
2467   Code = serialization::STMT_OMP_TARGET_SIMD_DIRECTIVE;
2468 }
2469 
2470 void ASTStmtWriter::VisitOMPTeamsDistributeDirective(
2471     OMPTeamsDistributeDirective *D) {
2472   VisitOMPLoopDirective(D);
2473   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_DIRECTIVE;
2474 }
2475 
2476 void ASTStmtWriter::VisitOMPTeamsDistributeSimdDirective(
2477     OMPTeamsDistributeSimdDirective *D) {
2478   VisitOMPLoopDirective(D);
2479   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_SIMD_DIRECTIVE;
2480 }
2481 
2482 void ASTStmtWriter::VisitOMPTeamsDistributeParallelForSimdDirective(
2483     OMPTeamsDistributeParallelForSimdDirective *D) {
2484   VisitOMPLoopDirective(D);
2485   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE;
2486 }
2487 
2488 void ASTStmtWriter::VisitOMPTeamsDistributeParallelForDirective(
2489     OMPTeamsDistributeParallelForDirective *D) {
2490   VisitOMPLoopDirective(D);
2491   Record.writeBool(D->hasCancel());
2492   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE;
2493 }
2494 
2495 void ASTStmtWriter::VisitOMPTargetTeamsDirective(OMPTargetTeamsDirective *D) {
2496   VisitStmt(D);
2497   VisitOMPExecutableDirective(D);
2498   Code = serialization::STMT_OMP_TARGET_TEAMS_DIRECTIVE;
2499 }
2500 
2501 void ASTStmtWriter::VisitOMPTargetTeamsDistributeDirective(
2502     OMPTargetTeamsDistributeDirective *D) {
2503   VisitOMPLoopDirective(D);
2504   Code = serialization::STMT_OMP_TARGET_TEAMS_DISTRIBUTE_DIRECTIVE;
2505 }
2506 
2507 void ASTStmtWriter::VisitOMPTargetTeamsDistributeParallelForDirective(
2508     OMPTargetTeamsDistributeParallelForDirective *D) {
2509   VisitOMPLoopDirective(D);
2510   Record.writeBool(D->hasCancel());
2511   Code = serialization::STMT_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE;
2512 }
2513 
2514 void ASTStmtWriter::VisitOMPTargetTeamsDistributeParallelForSimdDirective(
2515     OMPTargetTeamsDistributeParallelForSimdDirective *D) {
2516   VisitOMPLoopDirective(D);
2517   Code = serialization::
2518       STMT_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE;
2519 }
2520 
2521 void ASTStmtWriter::VisitOMPTargetTeamsDistributeSimdDirective(
2522     OMPTargetTeamsDistributeSimdDirective *D) {
2523   VisitOMPLoopDirective(D);
2524   Code = serialization::STMT_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD_DIRECTIVE;
2525 }
2526 
2527 //===----------------------------------------------------------------------===//
2528 // ASTWriter Implementation
2529 //===----------------------------------------------------------------------===//
2530 
2531 unsigned ASTWriter::RecordSwitchCaseID(SwitchCase *S) {
2532   assert(SwitchCaseIDs.find(S) == SwitchCaseIDs.end() &&
2533          "SwitchCase recorded twice");
2534   unsigned NextID = SwitchCaseIDs.size();
2535   SwitchCaseIDs[S] = NextID;
2536   return NextID;
2537 }
2538 
2539 unsigned ASTWriter::getSwitchCaseID(SwitchCase *S) {
2540   assert(SwitchCaseIDs.find(S) != SwitchCaseIDs.end() &&
2541          "SwitchCase hasn't been seen yet");
2542   return SwitchCaseIDs[S];
2543 }
2544 
2545 void ASTWriter::ClearSwitchCaseIDs() {
2546   SwitchCaseIDs.clear();
2547 }
2548 
2549 /// Write the given substatement or subexpression to the
2550 /// bitstream.
2551 void ASTWriter::WriteSubStmt(Stmt *S) {
2552   RecordData Record;
2553   ASTStmtWriter Writer(*this, Record);
2554   ++NumStatements;
2555 
2556   if (!S) {
2557     Stream.EmitRecord(serialization::STMT_NULL_PTR, Record);
2558     return;
2559   }
2560 
2561   llvm::DenseMap<Stmt *, uint64_t>::iterator I = SubStmtEntries.find(S);
2562   if (I != SubStmtEntries.end()) {
2563     Record.push_back(I->second);
2564     Stream.EmitRecord(serialization::STMT_REF_PTR, Record);
2565     return;
2566   }
2567 
2568 #ifndef NDEBUG
2569   assert(!ParentStmts.count(S) && "There is a Stmt cycle!");
2570 
2571   struct ParentStmtInserterRAII {
2572     Stmt *S;
2573     llvm::DenseSet<Stmt *> &ParentStmts;
2574 
2575     ParentStmtInserterRAII(Stmt *S, llvm::DenseSet<Stmt *> &ParentStmts)
2576       : S(S), ParentStmts(ParentStmts) {
2577       ParentStmts.insert(S);
2578     }
2579     ~ParentStmtInserterRAII() {
2580       ParentStmts.erase(S);
2581     }
2582   };
2583 
2584   ParentStmtInserterRAII ParentStmtInserter(S, ParentStmts);
2585 #endif
2586 
2587   Writer.Visit(S);
2588 
2589   uint64_t Offset = Writer.Emit();
2590   SubStmtEntries[S] = Offset;
2591 }
2592 
2593 /// Flush all of the statements that have been added to the
2594 /// queue via AddStmt().
2595 void ASTRecordWriter::FlushStmts() {
2596   // We expect to be the only consumer of the two temporary statement maps,
2597   // assert that they are empty.
2598   assert(Writer->SubStmtEntries.empty() && "unexpected entries in sub-stmt map");
2599   assert(Writer->ParentStmts.empty() && "unexpected entries in parent stmt map");
2600 
2601   for (unsigned I = 0, N = StmtsToEmit.size(); I != N; ++I) {
2602     Writer->WriteSubStmt(StmtsToEmit[I]);
2603 
2604     assert(N == StmtsToEmit.size() && "record modified while being written!");
2605 
2606     // Note that we are at the end of a full expression. Any
2607     // expression records that follow this one are part of a different
2608     // expression.
2609     Writer->Stream.EmitRecord(serialization::STMT_STOP, ArrayRef<uint32_t>());
2610 
2611     Writer->SubStmtEntries.clear();
2612     Writer->ParentStmts.clear();
2613   }
2614 
2615   StmtsToEmit.clear();
2616 }
2617 
2618 void ASTRecordWriter::FlushSubStmts() {
2619   // For a nested statement, write out the substatements in reverse order (so
2620   // that a simple stack machine can be used when loading), and don't emit a
2621   // STMT_STOP after each one.
2622   for (unsigned I = 0, N = StmtsToEmit.size(); I != N; ++I) {
2623     Writer->WriteSubStmt(StmtsToEmit[N - I - 1]);
2624     assert(N == StmtsToEmit.size() && "record modified while being written!");
2625   }
2626 
2627   StmtsToEmit.clear();
2628 }
2629