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