1 //===--- ASTWriterStmt.cpp - Statement and Expression Serialization -------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 ///
9 /// \file
10 /// Implements serialization for Statements and Expressions.
11 ///
12 //===----------------------------------------------------------------------===//
13 
14 #include "clang/AST/ExprOpenMP.h"
15 #include "clang/Serialization/ASTRecordWriter.h"
16 #include "clang/Sema/DeclSpec.h"
17 #include "clang/AST/ASTContext.h"
18 #include "clang/AST/DeclCXX.h"
19 #include "clang/AST/DeclObjC.h"
20 #include "clang/AST/DeclTemplate.h"
21 #include "clang/AST/StmtVisitor.h"
22 #include "clang/Lex/Token.h"
23 #include "llvm/Bitstream/BitstreamWriter.h"
24 using namespace clang;
25 
26 //===----------------------------------------------------------------------===//
27 // Statement/expression serialization
28 //===----------------------------------------------------------------------===//
29 
30 namespace clang {
31 
32   class ASTStmtWriter : public StmtVisitor<ASTStmtWriter, void> {
33     ASTWriter &Writer;
34     ASTRecordWriter Record;
35 
36     serialization::StmtCode Code;
37     unsigned AbbrevToUse;
38 
39   public:
40     ASTStmtWriter(ASTWriter &Writer, ASTWriter::RecordData &Record)
41         : Writer(Writer), Record(Writer, Record),
42           Code(serialization::STMT_NULL_PTR), AbbrevToUse(0) {}
43 
44     ASTStmtWriter(const ASTStmtWriter&) = delete;
45 
46     uint64_t Emit() {
47       assert(Code != serialization::STMT_NULL_PTR &&
48              "unhandled sub-statement writing AST file");
49       return Record.EmitStmt(Code, AbbrevToUse);
50     }
51 
52     void AddTemplateKWAndArgsInfo(const ASTTemplateKWAndArgsInfo &ArgInfo,
53                                   const TemplateArgumentLoc *Args);
54 
55     void VisitStmt(Stmt *S);
56 #define STMT(Type, Base) \
57     void Visit##Type(Type *);
58 #include "clang/AST/StmtNodes.inc"
59   };
60 }
61 
62 void ASTStmtWriter::AddTemplateKWAndArgsInfo(
63     const ASTTemplateKWAndArgsInfo &ArgInfo, const TemplateArgumentLoc *Args) {
64   Record.AddSourceLocation(ArgInfo.TemplateKWLoc);
65   Record.AddSourceLocation(ArgInfo.LAngleLoc);
66   Record.AddSourceLocation(ArgInfo.RAngleLoc);
67   for (unsigned i = 0; i != ArgInfo.NumTemplateArgs; ++i)
68     Record.AddTemplateArgumentLoc(Args[i]);
69 }
70 
71 void ASTStmtWriter::VisitStmt(Stmt *S) {
72 }
73 
74 void ASTStmtWriter::VisitNullStmt(NullStmt *S) {
75   VisitStmt(S);
76   Record.AddSourceLocation(S->getSemiLoc());
77   Record.push_back(S->NullStmtBits.HasLeadingEmptyMacro);
78   Code = serialization::STMT_NULL;
79 }
80 
81 void ASTStmtWriter::VisitCompoundStmt(CompoundStmt *S) {
82   VisitStmt(S);
83   Record.push_back(S->size());
84   for (auto *CS : S->body())
85     Record.AddStmt(CS);
86   Record.AddSourceLocation(S->getLBracLoc());
87   Record.AddSourceLocation(S->getRBracLoc());
88   Code = serialization::STMT_COMPOUND;
89 }
90 
91 void ASTStmtWriter::VisitSwitchCase(SwitchCase *S) {
92   VisitStmt(S);
93   Record.push_back(Writer.getSwitchCaseID(S));
94   Record.AddSourceLocation(S->getKeywordLoc());
95   Record.AddSourceLocation(S->getColonLoc());
96 }
97 
98 void ASTStmtWriter::VisitCaseStmt(CaseStmt *S) {
99   VisitSwitchCase(S);
100   Record.push_back(S->caseStmtIsGNURange());
101   Record.AddStmt(S->getLHS());
102   Record.AddStmt(S->getSubStmt());
103   if (S->caseStmtIsGNURange()) {
104     Record.AddStmt(S->getRHS());
105     Record.AddSourceLocation(S->getEllipsisLoc());
106   }
107   Code = serialization::STMT_CASE;
108 }
109 
110 void ASTStmtWriter::VisitDefaultStmt(DefaultStmt *S) {
111   VisitSwitchCase(S);
112   Record.AddStmt(S->getSubStmt());
113   Code = serialization::STMT_DEFAULT;
114 }
115 
116 void ASTStmtWriter::VisitLabelStmt(LabelStmt *S) {
117   VisitStmt(S);
118   Record.AddDeclRef(S->getDecl());
119   Record.AddStmt(S->getSubStmt());
120   Record.AddSourceLocation(S->getIdentLoc());
121   Code = serialization::STMT_LABEL;
122 }
123 
124 void ASTStmtWriter::VisitAttributedStmt(AttributedStmt *S) {
125   VisitStmt(S);
126   Record.push_back(S->getAttrs().size());
127   Record.AddAttributes(S->getAttrs());
128   Record.AddStmt(S->getSubStmt());
129   Record.AddSourceLocation(S->getAttrLoc());
130   Code = serialization::STMT_ATTRIBUTED;
131 }
132 
133 void ASTStmtWriter::VisitIfStmt(IfStmt *S) {
134   VisitStmt(S);
135 
136   bool HasElse = S->getElse() != nullptr;
137   bool HasVar = S->getConditionVariableDeclStmt() != nullptr;
138   bool HasInit = S->getInit() != nullptr;
139 
140   Record.push_back(S->isConstexpr());
141   Record.push_back(HasElse);
142   Record.push_back(HasVar);
143   Record.push_back(HasInit);
144 
145   Record.AddStmt(S->getCond());
146   Record.AddStmt(S->getThen());
147   if (HasElse)
148     Record.AddStmt(S->getElse());
149   if (HasVar)
150     Record.AddDeclRef(S->getConditionVariable());
151   if (HasInit)
152     Record.AddStmt(S->getInit());
153 
154   Record.AddSourceLocation(S->getIfLoc());
155   Record.AddSourceLocation(S->getLParenLoc());
156   Record.AddSourceLocation(S->getRParenLoc());
157   if (HasElse)
158     Record.AddSourceLocation(S->getElseLoc());
159 
160   Code = serialization::STMT_IF;
161 }
162 
163 void ASTStmtWriter::VisitSwitchStmt(SwitchStmt *S) {
164   VisitStmt(S);
165 
166   bool HasInit = S->getInit() != nullptr;
167   bool HasVar = S->getConditionVariableDeclStmt() != nullptr;
168   Record.push_back(HasInit);
169   Record.push_back(HasVar);
170   Record.push_back(S->isAllEnumCasesCovered());
171 
172   Record.AddStmt(S->getCond());
173   Record.AddStmt(S->getBody());
174   if (HasInit)
175     Record.AddStmt(S->getInit());
176   if (HasVar)
177     Record.AddDeclRef(S->getConditionVariable());
178 
179   Record.AddSourceLocation(S->getSwitchLoc());
180   Record.AddSourceLocation(S->getLParenLoc());
181   Record.AddSourceLocation(S->getRParenLoc());
182 
183   for (SwitchCase *SC = S->getSwitchCaseList(); SC;
184        SC = SC->getNextSwitchCase())
185     Record.push_back(Writer.RecordSwitchCaseID(SC));
186   Code = serialization::STMT_SWITCH;
187 }
188 
189 void ASTStmtWriter::VisitWhileStmt(WhileStmt *S) {
190   VisitStmt(S);
191 
192   bool HasVar = S->getConditionVariableDeclStmt() != nullptr;
193   Record.push_back(HasVar);
194 
195   Record.AddStmt(S->getCond());
196   Record.AddStmt(S->getBody());
197   if (HasVar)
198     Record.AddDeclRef(S->getConditionVariable());
199 
200   Record.AddSourceLocation(S->getWhileLoc());
201   Record.AddSourceLocation(S->getLParenLoc());
202   Record.AddSourceLocation(S->getRParenLoc());
203   Code = serialization::STMT_WHILE;
204 }
205 
206 void ASTStmtWriter::VisitDoStmt(DoStmt *S) {
207   VisitStmt(S);
208   Record.AddStmt(S->getCond());
209   Record.AddStmt(S->getBody());
210   Record.AddSourceLocation(S->getDoLoc());
211   Record.AddSourceLocation(S->getWhileLoc());
212   Record.AddSourceLocation(S->getRParenLoc());
213   Code = serialization::STMT_DO;
214 }
215 
216 void ASTStmtWriter::VisitForStmt(ForStmt *S) {
217   VisitStmt(S);
218   Record.AddStmt(S->getInit());
219   Record.AddStmt(S->getCond());
220   Record.AddDeclRef(S->getConditionVariable());
221   Record.AddStmt(S->getInc());
222   Record.AddStmt(S->getBody());
223   Record.AddSourceLocation(S->getForLoc());
224   Record.AddSourceLocation(S->getLParenLoc());
225   Record.AddSourceLocation(S->getRParenLoc());
226   Code = serialization::STMT_FOR;
227 }
228 
229 void ASTStmtWriter::VisitGotoStmt(GotoStmt *S) {
230   VisitStmt(S);
231   Record.AddDeclRef(S->getLabel());
232   Record.AddSourceLocation(S->getGotoLoc());
233   Record.AddSourceLocation(S->getLabelLoc());
234   Code = serialization::STMT_GOTO;
235 }
236 
237 void ASTStmtWriter::VisitIndirectGotoStmt(IndirectGotoStmt *S) {
238   VisitStmt(S);
239   Record.AddSourceLocation(S->getGotoLoc());
240   Record.AddSourceLocation(S->getStarLoc());
241   Record.AddStmt(S->getTarget());
242   Code = serialization::STMT_INDIRECT_GOTO;
243 }
244 
245 void ASTStmtWriter::VisitContinueStmt(ContinueStmt *S) {
246   VisitStmt(S);
247   Record.AddSourceLocation(S->getContinueLoc());
248   Code = serialization::STMT_CONTINUE;
249 }
250 
251 void ASTStmtWriter::VisitBreakStmt(BreakStmt *S) {
252   VisitStmt(S);
253   Record.AddSourceLocation(S->getBreakLoc());
254   Code = serialization::STMT_BREAK;
255 }
256 
257 void ASTStmtWriter::VisitReturnStmt(ReturnStmt *S) {
258   VisitStmt(S);
259 
260   bool HasNRVOCandidate = S->getNRVOCandidate() != nullptr;
261   Record.push_back(HasNRVOCandidate);
262 
263   Record.AddStmt(S->getRetValue());
264   if (HasNRVOCandidate)
265     Record.AddDeclRef(S->getNRVOCandidate());
266 
267   Record.AddSourceLocation(S->getReturnLoc());
268   Code = serialization::STMT_RETURN;
269 }
270 
271 void ASTStmtWriter::VisitDeclStmt(DeclStmt *S) {
272   VisitStmt(S);
273   Record.AddSourceLocation(S->getBeginLoc());
274   Record.AddSourceLocation(S->getEndLoc());
275   DeclGroupRef DG = S->getDeclGroup();
276   for (DeclGroupRef::iterator D = DG.begin(), DEnd = DG.end(); D != DEnd; ++D)
277     Record.AddDeclRef(*D);
278   Code = serialization::STMT_DECL;
279 }
280 
281 void ASTStmtWriter::VisitAsmStmt(AsmStmt *S) {
282   VisitStmt(S);
283   Record.push_back(S->getNumOutputs());
284   Record.push_back(S->getNumInputs());
285   Record.push_back(S->getNumClobbers());
286   Record.AddSourceLocation(S->getAsmLoc());
287   Record.push_back(S->isVolatile());
288   Record.push_back(S->isSimple());
289 }
290 
291 void ASTStmtWriter::VisitGCCAsmStmt(GCCAsmStmt *S) {
292   VisitAsmStmt(S);
293   Record.push_back(S->getNumLabels());
294   Record.AddSourceLocation(S->getRParenLoc());
295   Record.AddStmt(S->getAsmString());
296 
297   // Outputs
298   for (unsigned I = 0, N = S->getNumOutputs(); I != N; ++I) {
299     Record.AddIdentifierRef(S->getOutputIdentifier(I));
300     Record.AddStmt(S->getOutputConstraintLiteral(I));
301     Record.AddStmt(S->getOutputExpr(I));
302   }
303 
304   // Inputs
305   for (unsigned I = 0, N = S->getNumInputs(); I != N; ++I) {
306     Record.AddIdentifierRef(S->getInputIdentifier(I));
307     Record.AddStmt(S->getInputConstraintLiteral(I));
308     Record.AddStmt(S->getInputExpr(I));
309   }
310 
311   // Clobbers
312   for (unsigned I = 0, N = S->getNumClobbers(); I != N; ++I)
313     Record.AddStmt(S->getClobberStringLiteral(I));
314 
315   // Labels
316   for (auto *E : S->labels()) Record.AddStmt(E);
317 
318   Code = serialization::STMT_GCCASM;
319 }
320 
321 void ASTStmtWriter::VisitMSAsmStmt(MSAsmStmt *S) {
322   VisitAsmStmt(S);
323   Record.AddSourceLocation(S->getLBraceLoc());
324   Record.AddSourceLocation(S->getEndLoc());
325   Record.push_back(S->getNumAsmToks());
326   Record.AddString(S->getAsmString());
327 
328   // Tokens
329   for (unsigned I = 0, N = S->getNumAsmToks(); I != N; ++I) {
330     // FIXME: Move this to ASTRecordWriter?
331     Writer.AddToken(S->getAsmToks()[I], Record.getRecordData());
332   }
333 
334   // Clobbers
335   for (unsigned I = 0, N = S->getNumClobbers(); I != N; ++I) {
336     Record.AddString(S->getClobber(I));
337   }
338 
339   // Outputs
340   for (unsigned I = 0, N = S->getNumOutputs(); I != N; ++I) {
341     Record.AddStmt(S->getOutputExpr(I));
342     Record.AddString(S->getOutputConstraint(I));
343   }
344 
345   // Inputs
346   for (unsigned I = 0, N = S->getNumInputs(); I != N; ++I) {
347     Record.AddStmt(S->getInputExpr(I));
348     Record.AddString(S->getInputConstraint(I));
349   }
350 
351   Code = serialization::STMT_MSASM;
352 }
353 
354 void ASTStmtWriter::VisitCoroutineBodyStmt(CoroutineBodyStmt *CoroStmt) {
355   VisitStmt(CoroStmt);
356   Record.push_back(CoroStmt->getParamMoves().size());
357   for (Stmt *S : CoroStmt->children())
358     Record.AddStmt(S);
359   Code = serialization::STMT_COROUTINE_BODY;
360 }
361 
362 void ASTStmtWriter::VisitCoreturnStmt(CoreturnStmt *S) {
363   VisitStmt(S);
364   Record.AddSourceLocation(S->getKeywordLoc());
365   Record.AddStmt(S->getOperand());
366   Record.AddStmt(S->getPromiseCall());
367   Record.push_back(S->isImplicit());
368   Code = serialization::STMT_CORETURN;
369 }
370 
371 void ASTStmtWriter::VisitCoroutineSuspendExpr(CoroutineSuspendExpr *E) {
372   VisitExpr(E);
373   Record.AddSourceLocation(E->getKeywordLoc());
374   for (Stmt *S : E->children())
375     Record.AddStmt(S);
376   Record.AddStmt(E->getOpaqueValue());
377 }
378 
379 void ASTStmtWriter::VisitCoawaitExpr(CoawaitExpr *E) {
380   VisitCoroutineSuspendExpr(E);
381   Record.push_back(E->isImplicit());
382   Code = serialization::EXPR_COAWAIT;
383 }
384 
385 void ASTStmtWriter::VisitCoyieldExpr(CoyieldExpr *E) {
386   VisitCoroutineSuspendExpr(E);
387   Code = serialization::EXPR_COYIELD;
388 }
389 
390 void ASTStmtWriter::VisitDependentCoawaitExpr(DependentCoawaitExpr *E) {
391   VisitExpr(E);
392   Record.AddSourceLocation(E->getKeywordLoc());
393   for (Stmt *S : E->children())
394     Record.AddStmt(S);
395   Code = serialization::EXPR_DEPENDENT_COAWAIT;
396 }
397 
398 static void
399 addConstraintSatisfaction(ASTRecordWriter &Record,
400                           const ASTConstraintSatisfaction &Satisfaction) {
401   Record.push_back(Satisfaction.IsSatisfied);
402   if (!Satisfaction.IsSatisfied) {
403     Record.push_back(Satisfaction.NumRecords);
404     for (const auto &DetailRecord : Satisfaction) {
405       Record.AddStmt(const_cast<Expr *>(DetailRecord.first));
406       auto *E = DetailRecord.second.dyn_cast<Expr *>();
407       Record.push_back(E == nullptr);
408       if (E)
409         Record.AddStmt(E);
410       else {
411         auto *Diag = DetailRecord.second.get<std::pair<SourceLocation,
412                                                        StringRef> *>();
413         Record.AddSourceLocation(Diag->first);
414         Record.AddString(Diag->second);
415       }
416     }
417   }
418 }
419 
420 static void
421 addSubstitutionDiagnostic(
422     ASTRecordWriter &Record,
423     const concepts::Requirement::SubstitutionDiagnostic *D) {
424   Record.AddString(D->SubstitutedEntity);
425   Record.AddSourceLocation(D->DiagLoc);
426   Record.AddString(D->DiagMessage);
427 }
428 
429 void ASTStmtWriter::VisitConceptSpecializationExpr(
430         ConceptSpecializationExpr *E) {
431   VisitExpr(E);
432   ArrayRef<TemplateArgument> TemplateArgs = E->getTemplateArguments();
433   Record.push_back(TemplateArgs.size());
434   Record.AddNestedNameSpecifierLoc(E->getNestedNameSpecifierLoc());
435   Record.AddSourceLocation(E->getTemplateKWLoc());
436   Record.AddDeclarationNameInfo(E->getConceptNameInfo());
437   Record.AddDeclRef(E->getNamedConcept());
438   Record.AddDeclRef(E->getFoundDecl());
439   Record.AddASTTemplateArgumentListInfo(E->getTemplateArgsAsWritten());
440   for (const TemplateArgument &Arg : TemplateArgs)
441     Record.AddTemplateArgument(Arg);
442   if (!E->isValueDependent())
443     addConstraintSatisfaction(Record, E->getSatisfaction());
444 
445   Code = serialization::EXPR_CONCEPT_SPECIALIZATION;
446 }
447 
448 void ASTStmtWriter::VisitRequiresExpr(RequiresExpr *E) {
449   VisitExpr(E);
450   Record.push_back(E->getLocalParameters().size());
451   Record.push_back(E->getRequirements().size());
452   Record.AddSourceLocation(E->RequiresExprBits.RequiresKWLoc);
453   Record.push_back(E->RequiresExprBits.IsSatisfied);
454   Record.AddDeclRef(E->getBody());
455   for (ParmVarDecl *P : E->getLocalParameters())
456     Record.AddDeclRef(P);
457   for (concepts::Requirement *R : E->getRequirements()) {
458     if (auto *TypeReq = dyn_cast<concepts::TypeRequirement>(R)) {
459       Record.push_back(concepts::Requirement::RK_Type);
460       Record.push_back(TypeReq->Status);
461       if (TypeReq->Status == concepts::TypeRequirement::SS_SubstitutionFailure)
462         addSubstitutionDiagnostic(Record, TypeReq->getSubstitutionDiagnostic());
463       else
464         Record.AddTypeSourceInfo(TypeReq->getType());
465     } else if (auto *ExprReq = dyn_cast<concepts::ExprRequirement>(R)) {
466       Record.push_back(ExprReq->getKind());
467       Record.push_back(ExprReq->Status);
468       if (ExprReq->isExprSubstitutionFailure()) {
469         addSubstitutionDiagnostic(Record,
470          ExprReq->Value.get<concepts::Requirement::SubstitutionDiagnostic *>());
471       } else
472         Record.AddStmt(ExprReq->Value.get<Expr *>());
473       if (ExprReq->getKind() == concepts::Requirement::RK_Compound) {
474         Record.AddSourceLocation(ExprReq->NoexceptLoc);
475         const auto &RetReq = ExprReq->getReturnTypeRequirement();
476         if (RetReq.isSubstitutionFailure()) {
477           Record.push_back(2);
478           addSubstitutionDiagnostic(Record, RetReq.getSubstitutionDiagnostic());
479         } else if (RetReq.isTypeConstraint()) {
480           Record.push_back(1);
481           Record.AddTemplateParameterList(
482               RetReq.getTypeConstraintTemplateParameterList());
483           if (ExprReq->Status >=
484               concepts::ExprRequirement::SS_ConstraintsNotSatisfied)
485             Record.AddStmt(
486                 ExprReq->getReturnTypeRequirementSubstitutedConstraintExpr());
487         } else {
488           assert(RetReq.isEmpty());
489           Record.push_back(0);
490         }
491       }
492     } else {
493       auto *NestedReq = cast<concepts::NestedRequirement>(R);
494       Record.push_back(concepts::Requirement::RK_Nested);
495       Record.push_back(NestedReq->isSubstitutionFailure());
496       if (NestedReq->isSubstitutionFailure()){
497         addSubstitutionDiagnostic(Record,
498                                   NestedReq->getSubstitutionDiagnostic());
499       } else {
500         Record.AddStmt(NestedReq->Value.get<Expr *>());
501         if (!NestedReq->isDependent())
502           addConstraintSatisfaction(Record, *NestedReq->Satisfaction);
503       }
504     }
505   }
506   Record.AddSourceLocation(E->getEndLoc());
507 
508   Code = serialization::EXPR_REQUIRES;
509 }
510 
511 
512 void ASTStmtWriter::VisitCapturedStmt(CapturedStmt *S) {
513   VisitStmt(S);
514   // NumCaptures
515   Record.push_back(std::distance(S->capture_begin(), S->capture_end()));
516 
517   // CapturedDecl and captured region kind
518   Record.AddDeclRef(S->getCapturedDecl());
519   Record.push_back(S->getCapturedRegionKind());
520 
521   Record.AddDeclRef(S->getCapturedRecordDecl());
522 
523   // Capture inits
524   for (auto *I : S->capture_inits())
525     Record.AddStmt(I);
526 
527   // Body
528   Record.AddStmt(S->getCapturedStmt());
529 
530   // Captures
531   for (const auto &I : S->captures()) {
532     if (I.capturesThis() || I.capturesVariableArrayType())
533       Record.AddDeclRef(nullptr);
534     else
535       Record.AddDeclRef(I.getCapturedVar());
536     Record.push_back(I.getCaptureKind());
537     Record.AddSourceLocation(I.getLocation());
538   }
539 
540   Code = serialization::STMT_CAPTURED;
541 }
542 
543 void ASTStmtWriter::VisitExpr(Expr *E) {
544   VisitStmt(E);
545   Record.AddTypeRef(E->getType());
546   Record.push_back(E->isTypeDependent());
547   Record.push_back(E->isValueDependent());
548   Record.push_back(E->isInstantiationDependent());
549   Record.push_back(E->containsUnexpandedParameterPack());
550   Record.push_back(E->containsErrors());
551   Record.push_back(E->getValueKind());
552   Record.push_back(E->getObjectKind());
553 }
554 
555 void ASTStmtWriter::VisitConstantExpr(ConstantExpr *E) {
556   VisitExpr(E);
557   Record.push_back(E->ConstantExprBits.ResultKind);
558 
559   Record.push_back(E->ConstantExprBits.APValueKind);
560   Record.push_back(E->ConstantExprBits.IsUnsigned);
561   Record.push_back(E->ConstantExprBits.BitWidth);
562   // HasCleanup not serialized since we can just query the APValue.
563   Record.push_back(E->ConstantExprBits.IsImmediateInvocation);
564 
565   switch (E->ConstantExprBits.ResultKind) {
566   case ConstantExpr::RSK_None:
567     break;
568   case ConstantExpr::RSK_Int64:
569     Record.push_back(E->Int64Result());
570     break;
571   case ConstantExpr::RSK_APValue:
572     Record.AddAPValue(E->APValueResult());
573     break;
574   default:
575     llvm_unreachable("unexpected ResultKind!");
576   }
577 
578   Record.AddStmt(E->getSubExpr());
579   Code = serialization::EXPR_CONSTANT;
580 }
581 
582 void ASTStmtWriter::VisitPredefinedExpr(PredefinedExpr *E) {
583   VisitExpr(E);
584 
585   bool HasFunctionName = E->getFunctionName() != nullptr;
586   Record.push_back(HasFunctionName);
587   Record.push_back(E->getIdentKind()); // FIXME: stable encoding
588   Record.AddSourceLocation(E->getLocation());
589   if (HasFunctionName)
590     Record.AddStmt(E->getFunctionName());
591   Code = serialization::EXPR_PREDEFINED;
592 }
593 
594 void ASTStmtWriter::VisitDeclRefExpr(DeclRefExpr *E) {
595   VisitExpr(E);
596 
597   Record.push_back(E->hasQualifier());
598   Record.push_back(E->getDecl() != E->getFoundDecl());
599   Record.push_back(E->hasTemplateKWAndArgsInfo());
600   Record.push_back(E->hadMultipleCandidates());
601   Record.push_back(E->refersToEnclosingVariableOrCapture());
602   Record.push_back(E->isNonOdrUse());
603 
604   if (E->hasTemplateKWAndArgsInfo()) {
605     unsigned NumTemplateArgs = E->getNumTemplateArgs();
606     Record.push_back(NumTemplateArgs);
607   }
608 
609   DeclarationName::NameKind nk = (E->getDecl()->getDeclName().getNameKind());
610 
611   if ((!E->hasTemplateKWAndArgsInfo()) && (!E->hasQualifier()) &&
612       (E->getDecl() == E->getFoundDecl()) &&
613       nk == DeclarationName::Identifier &&
614       !E->refersToEnclosingVariableOrCapture() && !E->isNonOdrUse()) {
615     AbbrevToUse = Writer.getDeclRefExprAbbrev();
616   }
617 
618   if (E->hasQualifier())
619     Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
620 
621   if (E->getDecl() != E->getFoundDecl())
622     Record.AddDeclRef(E->getFoundDecl());
623 
624   if (E->hasTemplateKWAndArgsInfo())
625     AddTemplateKWAndArgsInfo(*E->getTrailingObjects<ASTTemplateKWAndArgsInfo>(),
626                              E->getTrailingObjects<TemplateArgumentLoc>());
627 
628   Record.AddDeclRef(E->getDecl());
629   Record.AddSourceLocation(E->getLocation());
630   Record.AddDeclarationNameLoc(E->DNLoc, E->getDecl()->getDeclName());
631   Code = serialization::EXPR_DECL_REF;
632 }
633 
634 void ASTStmtWriter::VisitIntegerLiteral(IntegerLiteral *E) {
635   VisitExpr(E);
636   Record.AddSourceLocation(E->getLocation());
637   Record.AddAPInt(E->getValue());
638 
639   if (E->getValue().getBitWidth() == 32) {
640     AbbrevToUse = Writer.getIntegerLiteralAbbrev();
641   }
642 
643   Code = serialization::EXPR_INTEGER_LITERAL;
644 }
645 
646 void ASTStmtWriter::VisitFixedPointLiteral(FixedPointLiteral *E) {
647   VisitExpr(E);
648   Record.AddSourceLocation(E->getLocation());
649   Record.push_back(E->getScale());
650   Record.AddAPInt(E->getValue());
651   Code = serialization::EXPR_FIXEDPOINT_LITERAL;
652 }
653 
654 void ASTStmtWriter::VisitFloatingLiteral(FloatingLiteral *E) {
655   VisitExpr(E);
656   Record.push_back(E->getRawSemantics());
657   Record.push_back(E->isExact());
658   Record.AddAPFloat(E->getValue());
659   Record.AddSourceLocation(E->getLocation());
660   Code = serialization::EXPR_FLOATING_LITERAL;
661 }
662 
663 void ASTStmtWriter::VisitImaginaryLiteral(ImaginaryLiteral *E) {
664   VisitExpr(E);
665   Record.AddStmt(E->getSubExpr());
666   Code = serialization::EXPR_IMAGINARY_LITERAL;
667 }
668 
669 void ASTStmtWriter::VisitStringLiteral(StringLiteral *E) {
670   VisitExpr(E);
671 
672   // Store the various bits of data of StringLiteral.
673   Record.push_back(E->getNumConcatenated());
674   Record.push_back(E->getLength());
675   Record.push_back(E->getCharByteWidth());
676   Record.push_back(E->getKind());
677   Record.push_back(E->isPascal());
678 
679   // Store the trailing array of SourceLocation.
680   for (unsigned I = 0, N = E->getNumConcatenated(); I != N; ++I)
681     Record.AddSourceLocation(E->getStrTokenLoc(I));
682 
683   // Store the trailing array of char holding the string data.
684   StringRef StrData = E->getBytes();
685   for (unsigned I = 0, N = E->getByteLength(); I != N; ++I)
686     Record.push_back(StrData[I]);
687 
688   Code = serialization::EXPR_STRING_LITERAL;
689 }
690 
691 void ASTStmtWriter::VisitCharacterLiteral(CharacterLiteral *E) {
692   VisitExpr(E);
693   Record.push_back(E->getValue());
694   Record.AddSourceLocation(E->getLocation());
695   Record.push_back(E->getKind());
696 
697   AbbrevToUse = Writer.getCharacterLiteralAbbrev();
698 
699   Code = serialization::EXPR_CHARACTER_LITERAL;
700 }
701 
702 void ASTStmtWriter::VisitParenExpr(ParenExpr *E) {
703   VisitExpr(E);
704   Record.AddSourceLocation(E->getLParen());
705   Record.AddSourceLocation(E->getRParen());
706   Record.AddStmt(E->getSubExpr());
707   Code = serialization::EXPR_PAREN;
708 }
709 
710 void ASTStmtWriter::VisitParenListExpr(ParenListExpr *E) {
711   VisitExpr(E);
712   Record.push_back(E->getNumExprs());
713   for (auto *SubStmt : E->exprs())
714     Record.AddStmt(SubStmt);
715   Record.AddSourceLocation(E->getLParenLoc());
716   Record.AddSourceLocation(E->getRParenLoc());
717   Code = serialization::EXPR_PAREN_LIST;
718 }
719 
720 void ASTStmtWriter::VisitUnaryOperator(UnaryOperator *E) {
721   VisitExpr(E);
722   bool HasFPFeatures = E->hasStoredFPFeatures();
723   // Write this first for easy access when deserializing, as they affect the
724   // size of the UnaryOperator.
725   Record.push_back(HasFPFeatures);
726   Record.AddStmt(E->getSubExpr());
727   Record.push_back(E->getOpcode()); // FIXME: stable encoding
728   Record.AddSourceLocation(E->getOperatorLoc());
729   Record.push_back(E->canOverflow());
730   if (HasFPFeatures)
731     Record.push_back(E->getStoredFPFeatures().getAsOpaqueInt());
732   Code = serialization::EXPR_UNARY_OPERATOR;
733 }
734 
735 void ASTStmtWriter::VisitOffsetOfExpr(OffsetOfExpr *E) {
736   VisitExpr(E);
737   Record.push_back(E->getNumComponents());
738   Record.push_back(E->getNumExpressions());
739   Record.AddSourceLocation(E->getOperatorLoc());
740   Record.AddSourceLocation(E->getRParenLoc());
741   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
742   for (unsigned I = 0, N = E->getNumComponents(); I != N; ++I) {
743     const OffsetOfNode &ON = E->getComponent(I);
744     Record.push_back(ON.getKind()); // FIXME: Stable encoding
745     Record.AddSourceLocation(ON.getSourceRange().getBegin());
746     Record.AddSourceLocation(ON.getSourceRange().getEnd());
747     switch (ON.getKind()) {
748     case OffsetOfNode::Array:
749       Record.push_back(ON.getArrayExprIndex());
750       break;
751 
752     case OffsetOfNode::Field:
753       Record.AddDeclRef(ON.getField());
754       break;
755 
756     case OffsetOfNode::Identifier:
757       Record.AddIdentifierRef(ON.getFieldName());
758       break;
759 
760     case OffsetOfNode::Base:
761       Record.AddCXXBaseSpecifier(*ON.getBase());
762       break;
763     }
764   }
765   for (unsigned I = 0, N = E->getNumExpressions(); I != N; ++I)
766     Record.AddStmt(E->getIndexExpr(I));
767   Code = serialization::EXPR_OFFSETOF;
768 }
769 
770 void ASTStmtWriter::VisitUnaryExprOrTypeTraitExpr(UnaryExprOrTypeTraitExpr *E) {
771   VisitExpr(E);
772   Record.push_back(E->getKind());
773   if (E->isArgumentType())
774     Record.AddTypeSourceInfo(E->getArgumentTypeInfo());
775   else {
776     Record.push_back(0);
777     Record.AddStmt(E->getArgumentExpr());
778   }
779   Record.AddSourceLocation(E->getOperatorLoc());
780   Record.AddSourceLocation(E->getRParenLoc());
781   Code = serialization::EXPR_SIZEOF_ALIGN_OF;
782 }
783 
784 void ASTStmtWriter::VisitArraySubscriptExpr(ArraySubscriptExpr *E) {
785   VisitExpr(E);
786   Record.AddStmt(E->getLHS());
787   Record.AddStmt(E->getRHS());
788   Record.AddSourceLocation(E->getRBracketLoc());
789   Code = serialization::EXPR_ARRAY_SUBSCRIPT;
790 }
791 
792 void ASTStmtWriter::VisitMatrixSubscriptExpr(MatrixSubscriptExpr *E) {
793   VisitExpr(E);
794   Record.AddStmt(E->getBase());
795   Record.AddStmt(E->getRowIdx());
796   Record.AddStmt(E->getColumnIdx());
797   Record.AddSourceLocation(E->getRBracketLoc());
798   Code = serialization::EXPR_ARRAY_SUBSCRIPT;
799 }
800 
801 void ASTStmtWriter::VisitOMPArraySectionExpr(OMPArraySectionExpr *E) {
802   VisitExpr(E);
803   Record.AddStmt(E->getBase());
804   Record.AddStmt(E->getLowerBound());
805   Record.AddStmt(E->getLength());
806   Record.AddStmt(E->getStride());
807   Record.AddSourceLocation(E->getColonLocFirst());
808   Record.AddSourceLocation(E->getColonLocSecond());
809   Record.AddSourceLocation(E->getRBracketLoc());
810   Code = serialization::EXPR_OMP_ARRAY_SECTION;
811 }
812 
813 void ASTStmtWriter::VisitOMPArrayShapingExpr(OMPArrayShapingExpr *E) {
814   VisitExpr(E);
815   Record.push_back(E->getDimensions().size());
816   Record.AddStmt(E->getBase());
817   for (Expr *Dim : E->getDimensions())
818     Record.AddStmt(Dim);
819   for (SourceRange SR : E->getBracketsRanges())
820     Record.AddSourceRange(SR);
821   Record.AddSourceLocation(E->getLParenLoc());
822   Record.AddSourceLocation(E->getRParenLoc());
823   Code = serialization::EXPR_OMP_ARRAY_SHAPING;
824 }
825 
826 void ASTStmtWriter::VisitOMPIteratorExpr(OMPIteratorExpr *E) {
827   VisitExpr(E);
828   Record.push_back(E->numOfIterators());
829   Record.AddSourceLocation(E->getIteratorKwLoc());
830   Record.AddSourceLocation(E->getLParenLoc());
831   Record.AddSourceLocation(E->getRParenLoc());
832   for (unsigned I = 0, End = E->numOfIterators(); I < End; ++I) {
833     Record.AddDeclRef(E->getIteratorDecl(I));
834     Record.AddSourceLocation(E->getAssignLoc(I));
835     OMPIteratorExpr::IteratorRange Range = E->getIteratorRange(I);
836     Record.AddStmt(Range.Begin);
837     Record.AddStmt(Range.End);
838     Record.AddStmt(Range.Step);
839     Record.AddSourceLocation(E->getColonLoc(I));
840     if (Range.Step)
841       Record.AddSourceLocation(E->getSecondColonLoc(I));
842     // Serialize helpers
843     OMPIteratorHelperData &HD = E->getHelper(I);
844     Record.AddDeclRef(HD.CounterVD);
845     Record.AddStmt(HD.Upper);
846     Record.AddStmt(HD.Update);
847     Record.AddStmt(HD.CounterUpdate);
848   }
849   Code = serialization::EXPR_OMP_ITERATOR;
850 }
851 
852 void ASTStmtWriter::VisitCallExpr(CallExpr *E) {
853   VisitExpr(E);
854   Record.push_back(E->getNumArgs());
855   Record.push_back(E->hasStoredFPFeatures());
856   Record.AddSourceLocation(E->getRParenLoc());
857   Record.AddStmt(E->getCallee());
858   for (CallExpr::arg_iterator Arg = E->arg_begin(), ArgEnd = E->arg_end();
859        Arg != ArgEnd; ++Arg)
860     Record.AddStmt(*Arg);
861   Record.push_back(static_cast<unsigned>(E->getADLCallKind()));
862   if (E->hasStoredFPFeatures())
863     Record.push_back(E->getFPFeatures().getAsOpaqueInt());
864   Code = serialization::EXPR_CALL;
865 }
866 
867 void ASTStmtWriter::VisitRecoveryExpr(RecoveryExpr *E) {
868   VisitExpr(E);
869   Record.push_back(std::distance(E->children().begin(), E->children().end()));
870   Record.AddSourceLocation(E->getBeginLoc());
871   Record.AddSourceLocation(E->getEndLoc());
872   for (Stmt *Child : E->children())
873     Record.AddStmt(Child);
874   Code = serialization::EXPR_RECOVERY;
875 }
876 
877 void ASTStmtWriter::VisitMemberExpr(MemberExpr *E) {
878   VisitExpr(E);
879 
880   bool HasQualifier = E->hasQualifier();
881   bool HasFoundDecl =
882       E->hasQualifierOrFoundDecl() &&
883       (E->getFoundDecl().getDecl() != E->getMemberDecl() ||
884        E->getFoundDecl().getAccess() != E->getMemberDecl()->getAccess());
885   bool HasTemplateInfo = E->hasTemplateKWAndArgsInfo();
886   unsigned NumTemplateArgs = E->getNumTemplateArgs();
887 
888   // Write these first for easy access when deserializing, as they affect the
889   // size of the MemberExpr.
890   Record.push_back(HasQualifier);
891   Record.push_back(HasFoundDecl);
892   Record.push_back(HasTemplateInfo);
893   Record.push_back(NumTemplateArgs);
894 
895   Record.AddStmt(E->getBase());
896   Record.AddDeclRef(E->getMemberDecl());
897   Record.AddDeclarationNameLoc(E->MemberDNLoc,
898                                E->getMemberDecl()->getDeclName());
899   Record.AddSourceLocation(E->getMemberLoc());
900   Record.push_back(E->isArrow());
901   Record.push_back(E->hadMultipleCandidates());
902   Record.push_back(E->isNonOdrUse());
903   Record.AddSourceLocation(E->getOperatorLoc());
904 
905   if (HasFoundDecl) {
906     DeclAccessPair FoundDecl = E->getFoundDecl();
907     Record.AddDeclRef(FoundDecl.getDecl());
908     Record.push_back(FoundDecl.getAccess());
909   }
910 
911   if (HasQualifier)
912     Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
913 
914   if (HasTemplateInfo)
915     AddTemplateKWAndArgsInfo(*E->getTrailingObjects<ASTTemplateKWAndArgsInfo>(),
916                              E->getTrailingObjects<TemplateArgumentLoc>());
917 
918   Code = serialization::EXPR_MEMBER;
919 }
920 
921 void ASTStmtWriter::VisitObjCIsaExpr(ObjCIsaExpr *E) {
922   VisitExpr(E);
923   Record.AddStmt(E->getBase());
924   Record.AddSourceLocation(E->getIsaMemberLoc());
925   Record.AddSourceLocation(E->getOpLoc());
926   Record.push_back(E->isArrow());
927   Code = serialization::EXPR_OBJC_ISA;
928 }
929 
930 void ASTStmtWriter::
931 VisitObjCIndirectCopyRestoreExpr(ObjCIndirectCopyRestoreExpr *E) {
932   VisitExpr(E);
933   Record.AddStmt(E->getSubExpr());
934   Record.push_back(E->shouldCopy());
935   Code = serialization::EXPR_OBJC_INDIRECT_COPY_RESTORE;
936 }
937 
938 void ASTStmtWriter::VisitObjCBridgedCastExpr(ObjCBridgedCastExpr *E) {
939   VisitExplicitCastExpr(E);
940   Record.AddSourceLocation(E->getLParenLoc());
941   Record.AddSourceLocation(E->getBridgeKeywordLoc());
942   Record.push_back(E->getBridgeKind()); // FIXME: Stable encoding
943   Code = serialization::EXPR_OBJC_BRIDGED_CAST;
944 }
945 
946 void ASTStmtWriter::VisitCastExpr(CastExpr *E) {
947   VisitExpr(E);
948   Record.push_back(E->path_size());
949   Record.AddStmt(E->getSubExpr());
950   Record.push_back(E->getCastKind()); // FIXME: stable encoding
951 
952   for (CastExpr::path_iterator
953          PI = E->path_begin(), PE = E->path_end(); PI != PE; ++PI)
954     Record.AddCXXBaseSpecifier(**PI);
955 }
956 
957 void ASTStmtWriter::VisitBinaryOperator(BinaryOperator *E) {
958   VisitExpr(E);
959   bool HasFPFeatures = E->hasStoredFPFeatures();
960   // Write this first for easy access when deserializing, as they affect the
961   // size of the UnaryOperator.
962   Record.push_back(HasFPFeatures);
963   Record.push_back(E->getOpcode()); // FIXME: stable encoding
964   Record.AddStmt(E->getLHS());
965   Record.AddStmt(E->getRHS());
966   Record.AddSourceLocation(E->getOperatorLoc());
967   if (HasFPFeatures)
968     Record.push_back(E->getStoredFPFeatures().getAsOpaqueInt());
969   Code = serialization::EXPR_BINARY_OPERATOR;
970 }
971 
972 void ASTStmtWriter::VisitCompoundAssignOperator(CompoundAssignOperator *E) {
973   VisitBinaryOperator(E);
974   Record.AddTypeRef(E->getComputationLHSType());
975   Record.AddTypeRef(E->getComputationResultType());
976   Code = serialization::EXPR_COMPOUND_ASSIGN_OPERATOR;
977 }
978 
979 void ASTStmtWriter::VisitConditionalOperator(ConditionalOperator *E) {
980   VisitExpr(E);
981   Record.AddStmt(E->getCond());
982   Record.AddStmt(E->getLHS());
983   Record.AddStmt(E->getRHS());
984   Record.AddSourceLocation(E->getQuestionLoc());
985   Record.AddSourceLocation(E->getColonLoc());
986   Code = serialization::EXPR_CONDITIONAL_OPERATOR;
987 }
988 
989 void
990 ASTStmtWriter::VisitBinaryConditionalOperator(BinaryConditionalOperator *E) {
991   VisitExpr(E);
992   Record.AddStmt(E->getOpaqueValue());
993   Record.AddStmt(E->getCommon());
994   Record.AddStmt(E->getCond());
995   Record.AddStmt(E->getTrueExpr());
996   Record.AddStmt(E->getFalseExpr());
997   Record.AddSourceLocation(E->getQuestionLoc());
998   Record.AddSourceLocation(E->getColonLoc());
999   Code = serialization::EXPR_BINARY_CONDITIONAL_OPERATOR;
1000 }
1001 
1002 void ASTStmtWriter::VisitImplicitCastExpr(ImplicitCastExpr *E) {
1003   VisitCastExpr(E);
1004   Record.push_back(E->isPartOfExplicitCast());
1005 
1006   if (E->path_size() == 0)
1007     AbbrevToUse = Writer.getExprImplicitCastAbbrev();
1008 
1009   Code = serialization::EXPR_IMPLICIT_CAST;
1010 }
1011 
1012 void ASTStmtWriter::VisitExplicitCastExpr(ExplicitCastExpr *E) {
1013   VisitCastExpr(E);
1014   Record.AddTypeSourceInfo(E->getTypeInfoAsWritten());
1015 }
1016 
1017 void ASTStmtWriter::VisitCStyleCastExpr(CStyleCastExpr *E) {
1018   VisitExplicitCastExpr(E);
1019   Record.AddSourceLocation(E->getLParenLoc());
1020   Record.AddSourceLocation(E->getRParenLoc());
1021   Code = serialization::EXPR_CSTYLE_CAST;
1022 }
1023 
1024 void ASTStmtWriter::VisitCompoundLiteralExpr(CompoundLiteralExpr *E) {
1025   VisitExpr(E);
1026   Record.AddSourceLocation(E->getLParenLoc());
1027   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1028   Record.AddStmt(E->getInitializer());
1029   Record.push_back(E->isFileScope());
1030   Code = serialization::EXPR_COMPOUND_LITERAL;
1031 }
1032 
1033 void ASTStmtWriter::VisitExtVectorElementExpr(ExtVectorElementExpr *E) {
1034   VisitExpr(E);
1035   Record.AddStmt(E->getBase());
1036   Record.AddIdentifierRef(&E->getAccessor());
1037   Record.AddSourceLocation(E->getAccessorLoc());
1038   Code = serialization::EXPR_EXT_VECTOR_ELEMENT;
1039 }
1040 
1041 void ASTStmtWriter::VisitInitListExpr(InitListExpr *E) {
1042   VisitExpr(E);
1043   // NOTE: only add the (possibly null) syntactic form.
1044   // No need to serialize the isSemanticForm flag and the semantic form.
1045   Record.AddStmt(E->getSyntacticForm());
1046   Record.AddSourceLocation(E->getLBraceLoc());
1047   Record.AddSourceLocation(E->getRBraceLoc());
1048   bool isArrayFiller = E->ArrayFillerOrUnionFieldInit.is<Expr*>();
1049   Record.push_back(isArrayFiller);
1050   if (isArrayFiller)
1051     Record.AddStmt(E->getArrayFiller());
1052   else
1053     Record.AddDeclRef(E->getInitializedFieldInUnion());
1054   Record.push_back(E->hadArrayRangeDesignator());
1055   Record.push_back(E->getNumInits());
1056   if (isArrayFiller) {
1057     // ArrayFiller may have filled "holes" due to designated initializer.
1058     // Replace them by 0 to indicate that the filler goes in that place.
1059     Expr *filler = E->getArrayFiller();
1060     for (unsigned I = 0, N = E->getNumInits(); I != N; ++I)
1061       Record.AddStmt(E->getInit(I) != filler ? E->getInit(I) : nullptr);
1062   } else {
1063     for (unsigned I = 0, N = E->getNumInits(); I != N; ++I)
1064       Record.AddStmt(E->getInit(I));
1065   }
1066   Code = serialization::EXPR_INIT_LIST;
1067 }
1068 
1069 void ASTStmtWriter::VisitDesignatedInitExpr(DesignatedInitExpr *E) {
1070   VisitExpr(E);
1071   Record.push_back(E->getNumSubExprs());
1072   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
1073     Record.AddStmt(E->getSubExpr(I));
1074   Record.AddSourceLocation(E->getEqualOrColonLoc());
1075   Record.push_back(E->usesGNUSyntax());
1076   for (const DesignatedInitExpr::Designator &D : E->designators()) {
1077     if (D.isFieldDesignator()) {
1078       if (FieldDecl *Field = D.getField()) {
1079         Record.push_back(serialization::DESIG_FIELD_DECL);
1080         Record.AddDeclRef(Field);
1081       } else {
1082         Record.push_back(serialization::DESIG_FIELD_NAME);
1083         Record.AddIdentifierRef(D.getFieldName());
1084       }
1085       Record.AddSourceLocation(D.getDotLoc());
1086       Record.AddSourceLocation(D.getFieldLoc());
1087     } else if (D.isArrayDesignator()) {
1088       Record.push_back(serialization::DESIG_ARRAY);
1089       Record.push_back(D.getFirstExprIndex());
1090       Record.AddSourceLocation(D.getLBracketLoc());
1091       Record.AddSourceLocation(D.getRBracketLoc());
1092     } else {
1093       assert(D.isArrayRangeDesignator() && "Unknown designator");
1094       Record.push_back(serialization::DESIG_ARRAY_RANGE);
1095       Record.push_back(D.getFirstExprIndex());
1096       Record.AddSourceLocation(D.getLBracketLoc());
1097       Record.AddSourceLocation(D.getEllipsisLoc());
1098       Record.AddSourceLocation(D.getRBracketLoc());
1099     }
1100   }
1101   Code = serialization::EXPR_DESIGNATED_INIT;
1102 }
1103 
1104 void ASTStmtWriter::VisitDesignatedInitUpdateExpr(DesignatedInitUpdateExpr *E) {
1105   VisitExpr(E);
1106   Record.AddStmt(E->getBase());
1107   Record.AddStmt(E->getUpdater());
1108   Code = serialization::EXPR_DESIGNATED_INIT_UPDATE;
1109 }
1110 
1111 void ASTStmtWriter::VisitNoInitExpr(NoInitExpr *E) {
1112   VisitExpr(E);
1113   Code = serialization::EXPR_NO_INIT;
1114 }
1115 
1116 void ASTStmtWriter::VisitArrayInitLoopExpr(ArrayInitLoopExpr *E) {
1117   VisitExpr(E);
1118   Record.AddStmt(E->SubExprs[0]);
1119   Record.AddStmt(E->SubExprs[1]);
1120   Code = serialization::EXPR_ARRAY_INIT_LOOP;
1121 }
1122 
1123 void ASTStmtWriter::VisitArrayInitIndexExpr(ArrayInitIndexExpr *E) {
1124   VisitExpr(E);
1125   Code = serialization::EXPR_ARRAY_INIT_INDEX;
1126 }
1127 
1128 void ASTStmtWriter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) {
1129   VisitExpr(E);
1130   Code = serialization::EXPR_IMPLICIT_VALUE_INIT;
1131 }
1132 
1133 void ASTStmtWriter::VisitVAArgExpr(VAArgExpr *E) {
1134   VisitExpr(E);
1135   Record.AddStmt(E->getSubExpr());
1136   Record.AddTypeSourceInfo(E->getWrittenTypeInfo());
1137   Record.AddSourceLocation(E->getBuiltinLoc());
1138   Record.AddSourceLocation(E->getRParenLoc());
1139   Record.push_back(E->isMicrosoftABI());
1140   Code = serialization::EXPR_VA_ARG;
1141 }
1142 
1143 void ASTStmtWriter::VisitSourceLocExpr(SourceLocExpr *E) {
1144   VisitExpr(E);
1145   Record.AddDeclRef(cast_or_null<Decl>(E->getParentContext()));
1146   Record.AddSourceLocation(E->getBeginLoc());
1147   Record.AddSourceLocation(E->getEndLoc());
1148   Record.push_back(E->getIdentKind());
1149   Code = serialization::EXPR_SOURCE_LOC;
1150 }
1151 
1152 void ASTStmtWriter::VisitAddrLabelExpr(AddrLabelExpr *E) {
1153   VisitExpr(E);
1154   Record.AddSourceLocation(E->getAmpAmpLoc());
1155   Record.AddSourceLocation(E->getLabelLoc());
1156   Record.AddDeclRef(E->getLabel());
1157   Code = serialization::EXPR_ADDR_LABEL;
1158 }
1159 
1160 void ASTStmtWriter::VisitStmtExpr(StmtExpr *E) {
1161   VisitExpr(E);
1162   Record.AddStmt(E->getSubStmt());
1163   Record.AddSourceLocation(E->getLParenLoc());
1164   Record.AddSourceLocation(E->getRParenLoc());
1165   Record.push_back(E->getTemplateDepth());
1166   Code = serialization::EXPR_STMT;
1167 }
1168 
1169 void ASTStmtWriter::VisitChooseExpr(ChooseExpr *E) {
1170   VisitExpr(E);
1171   Record.AddStmt(E->getCond());
1172   Record.AddStmt(E->getLHS());
1173   Record.AddStmt(E->getRHS());
1174   Record.AddSourceLocation(E->getBuiltinLoc());
1175   Record.AddSourceLocation(E->getRParenLoc());
1176   Record.push_back(E->isConditionDependent() ? false : E->isConditionTrue());
1177   Code = serialization::EXPR_CHOOSE;
1178 }
1179 
1180 void ASTStmtWriter::VisitGNUNullExpr(GNUNullExpr *E) {
1181   VisitExpr(E);
1182   Record.AddSourceLocation(E->getTokenLocation());
1183   Code = serialization::EXPR_GNU_NULL;
1184 }
1185 
1186 void ASTStmtWriter::VisitShuffleVectorExpr(ShuffleVectorExpr *E) {
1187   VisitExpr(E);
1188   Record.push_back(E->getNumSubExprs());
1189   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
1190     Record.AddStmt(E->getExpr(I));
1191   Record.AddSourceLocation(E->getBuiltinLoc());
1192   Record.AddSourceLocation(E->getRParenLoc());
1193   Code = serialization::EXPR_SHUFFLE_VECTOR;
1194 }
1195 
1196 void ASTStmtWriter::VisitConvertVectorExpr(ConvertVectorExpr *E) {
1197   VisitExpr(E);
1198   Record.AddSourceLocation(E->getBuiltinLoc());
1199   Record.AddSourceLocation(E->getRParenLoc());
1200   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1201   Record.AddStmt(E->getSrcExpr());
1202   Code = serialization::EXPR_CONVERT_VECTOR;
1203 }
1204 
1205 void ASTStmtWriter::VisitBlockExpr(BlockExpr *E) {
1206   VisitExpr(E);
1207   Record.AddDeclRef(E->getBlockDecl());
1208   Code = serialization::EXPR_BLOCK;
1209 }
1210 
1211 void ASTStmtWriter::VisitGenericSelectionExpr(GenericSelectionExpr *E) {
1212   VisitExpr(E);
1213 
1214   Record.push_back(E->getNumAssocs());
1215   Record.push_back(E->ResultIndex);
1216   Record.AddSourceLocation(E->getGenericLoc());
1217   Record.AddSourceLocation(E->getDefaultLoc());
1218   Record.AddSourceLocation(E->getRParenLoc());
1219 
1220   Stmt **Stmts = E->getTrailingObjects<Stmt *>();
1221   // Add 1 to account for the controlling expression which is the first
1222   // expression in the trailing array of Stmt *. This is not needed for
1223   // the trailing array of TypeSourceInfo *.
1224   for (unsigned I = 0, N = E->getNumAssocs() + 1; I < N; ++I)
1225     Record.AddStmt(Stmts[I]);
1226 
1227   TypeSourceInfo **TSIs = E->getTrailingObjects<TypeSourceInfo *>();
1228   for (unsigned I = 0, N = E->getNumAssocs(); I < N; ++I)
1229     Record.AddTypeSourceInfo(TSIs[I]);
1230 
1231   Code = serialization::EXPR_GENERIC_SELECTION;
1232 }
1233 
1234 void ASTStmtWriter::VisitPseudoObjectExpr(PseudoObjectExpr *E) {
1235   VisitExpr(E);
1236   Record.push_back(E->getNumSemanticExprs());
1237 
1238   // Push the result index.  Currently, this needs to exactly match
1239   // the encoding used internally for ResultIndex.
1240   unsigned result = E->getResultExprIndex();
1241   result = (result == PseudoObjectExpr::NoResult ? 0 : result + 1);
1242   Record.push_back(result);
1243 
1244   Record.AddStmt(E->getSyntacticForm());
1245   for (PseudoObjectExpr::semantics_iterator
1246          i = E->semantics_begin(), e = E->semantics_end(); i != e; ++i) {
1247     Record.AddStmt(*i);
1248   }
1249   Code = serialization::EXPR_PSEUDO_OBJECT;
1250 }
1251 
1252 void ASTStmtWriter::VisitAtomicExpr(AtomicExpr *E) {
1253   VisitExpr(E);
1254   Record.push_back(E->getOp());
1255   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
1256     Record.AddStmt(E->getSubExprs()[I]);
1257   Record.AddSourceLocation(E->getBuiltinLoc());
1258   Record.AddSourceLocation(E->getRParenLoc());
1259   Code = serialization::EXPR_ATOMIC;
1260 }
1261 
1262 //===----------------------------------------------------------------------===//
1263 // Objective-C Expressions and Statements.
1264 //===----------------------------------------------------------------------===//
1265 
1266 void ASTStmtWriter::VisitObjCStringLiteral(ObjCStringLiteral *E) {
1267   VisitExpr(E);
1268   Record.AddStmt(E->getString());
1269   Record.AddSourceLocation(E->getAtLoc());
1270   Code = serialization::EXPR_OBJC_STRING_LITERAL;
1271 }
1272 
1273 void ASTStmtWriter::VisitObjCBoxedExpr(ObjCBoxedExpr *E) {
1274   VisitExpr(E);
1275   Record.AddStmt(E->getSubExpr());
1276   Record.AddDeclRef(E->getBoxingMethod());
1277   Record.AddSourceRange(E->getSourceRange());
1278   Code = serialization::EXPR_OBJC_BOXED_EXPRESSION;
1279 }
1280 
1281 void ASTStmtWriter::VisitObjCArrayLiteral(ObjCArrayLiteral *E) {
1282   VisitExpr(E);
1283   Record.push_back(E->getNumElements());
1284   for (unsigned i = 0; i < E->getNumElements(); i++)
1285     Record.AddStmt(E->getElement(i));
1286   Record.AddDeclRef(E->getArrayWithObjectsMethod());
1287   Record.AddSourceRange(E->getSourceRange());
1288   Code = serialization::EXPR_OBJC_ARRAY_LITERAL;
1289 }
1290 
1291 void ASTStmtWriter::VisitObjCDictionaryLiteral(ObjCDictionaryLiteral *E) {
1292   VisitExpr(E);
1293   Record.push_back(E->getNumElements());
1294   Record.push_back(E->HasPackExpansions);
1295   for (unsigned i = 0; i < E->getNumElements(); i++) {
1296     ObjCDictionaryElement Element = E->getKeyValueElement(i);
1297     Record.AddStmt(Element.Key);
1298     Record.AddStmt(Element.Value);
1299     if (E->HasPackExpansions) {
1300       Record.AddSourceLocation(Element.EllipsisLoc);
1301       unsigned NumExpansions = 0;
1302       if (Element.NumExpansions)
1303         NumExpansions = *Element.NumExpansions + 1;
1304       Record.push_back(NumExpansions);
1305     }
1306   }
1307 
1308   Record.AddDeclRef(E->getDictWithObjectsMethod());
1309   Record.AddSourceRange(E->getSourceRange());
1310   Code = serialization::EXPR_OBJC_DICTIONARY_LITERAL;
1311 }
1312 
1313 void ASTStmtWriter::VisitObjCEncodeExpr(ObjCEncodeExpr *E) {
1314   VisitExpr(E);
1315   Record.AddTypeSourceInfo(E->getEncodedTypeSourceInfo());
1316   Record.AddSourceLocation(E->getAtLoc());
1317   Record.AddSourceLocation(E->getRParenLoc());
1318   Code = serialization::EXPR_OBJC_ENCODE;
1319 }
1320 
1321 void ASTStmtWriter::VisitObjCSelectorExpr(ObjCSelectorExpr *E) {
1322   VisitExpr(E);
1323   Record.AddSelectorRef(E->getSelector());
1324   Record.AddSourceLocation(E->getAtLoc());
1325   Record.AddSourceLocation(E->getRParenLoc());
1326   Code = serialization::EXPR_OBJC_SELECTOR_EXPR;
1327 }
1328 
1329 void ASTStmtWriter::VisitObjCProtocolExpr(ObjCProtocolExpr *E) {
1330   VisitExpr(E);
1331   Record.AddDeclRef(E->getProtocol());
1332   Record.AddSourceLocation(E->getAtLoc());
1333   Record.AddSourceLocation(E->ProtoLoc);
1334   Record.AddSourceLocation(E->getRParenLoc());
1335   Code = serialization::EXPR_OBJC_PROTOCOL_EXPR;
1336 }
1337 
1338 void ASTStmtWriter::VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) {
1339   VisitExpr(E);
1340   Record.AddDeclRef(E->getDecl());
1341   Record.AddSourceLocation(E->getLocation());
1342   Record.AddSourceLocation(E->getOpLoc());
1343   Record.AddStmt(E->getBase());
1344   Record.push_back(E->isArrow());
1345   Record.push_back(E->isFreeIvar());
1346   Code = serialization::EXPR_OBJC_IVAR_REF_EXPR;
1347 }
1348 
1349 void ASTStmtWriter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) {
1350   VisitExpr(E);
1351   Record.push_back(E->SetterAndMethodRefFlags.getInt());
1352   Record.push_back(E->isImplicitProperty());
1353   if (E->isImplicitProperty()) {
1354     Record.AddDeclRef(E->getImplicitPropertyGetter());
1355     Record.AddDeclRef(E->getImplicitPropertySetter());
1356   } else {
1357     Record.AddDeclRef(E->getExplicitProperty());
1358   }
1359   Record.AddSourceLocation(E->getLocation());
1360   Record.AddSourceLocation(E->getReceiverLocation());
1361   if (E->isObjectReceiver()) {
1362     Record.push_back(0);
1363     Record.AddStmt(E->getBase());
1364   } else if (E->isSuperReceiver()) {
1365     Record.push_back(1);
1366     Record.AddTypeRef(E->getSuperReceiverType());
1367   } else {
1368     Record.push_back(2);
1369     Record.AddDeclRef(E->getClassReceiver());
1370   }
1371 
1372   Code = serialization::EXPR_OBJC_PROPERTY_REF_EXPR;
1373 }
1374 
1375 void ASTStmtWriter::VisitObjCSubscriptRefExpr(ObjCSubscriptRefExpr *E) {
1376   VisitExpr(E);
1377   Record.AddSourceLocation(E->getRBracket());
1378   Record.AddStmt(E->getBaseExpr());
1379   Record.AddStmt(E->getKeyExpr());
1380   Record.AddDeclRef(E->getAtIndexMethodDecl());
1381   Record.AddDeclRef(E->setAtIndexMethodDecl());
1382 
1383   Code = serialization::EXPR_OBJC_SUBSCRIPT_REF_EXPR;
1384 }
1385 
1386 void ASTStmtWriter::VisitObjCMessageExpr(ObjCMessageExpr *E) {
1387   VisitExpr(E);
1388   Record.push_back(E->getNumArgs());
1389   Record.push_back(E->getNumStoredSelLocs());
1390   Record.push_back(E->SelLocsKind);
1391   Record.push_back(E->isDelegateInitCall());
1392   Record.push_back(E->IsImplicit);
1393   Record.push_back((unsigned)E->getReceiverKind()); // FIXME: stable encoding
1394   switch (E->getReceiverKind()) {
1395   case ObjCMessageExpr::Instance:
1396     Record.AddStmt(E->getInstanceReceiver());
1397     break;
1398 
1399   case ObjCMessageExpr::Class:
1400     Record.AddTypeSourceInfo(E->getClassReceiverTypeInfo());
1401     break;
1402 
1403   case ObjCMessageExpr::SuperClass:
1404   case ObjCMessageExpr::SuperInstance:
1405     Record.AddTypeRef(E->getSuperType());
1406     Record.AddSourceLocation(E->getSuperLoc());
1407     break;
1408   }
1409 
1410   if (E->getMethodDecl()) {
1411     Record.push_back(1);
1412     Record.AddDeclRef(E->getMethodDecl());
1413   } else {
1414     Record.push_back(0);
1415     Record.AddSelectorRef(E->getSelector());
1416   }
1417 
1418   Record.AddSourceLocation(E->getLeftLoc());
1419   Record.AddSourceLocation(E->getRightLoc());
1420 
1421   for (CallExpr::arg_iterator Arg = E->arg_begin(), ArgEnd = E->arg_end();
1422        Arg != ArgEnd; ++Arg)
1423     Record.AddStmt(*Arg);
1424 
1425   SourceLocation *Locs = E->getStoredSelLocs();
1426   for (unsigned i = 0, e = E->getNumStoredSelLocs(); i != e; ++i)
1427     Record.AddSourceLocation(Locs[i]);
1428 
1429   Code = serialization::EXPR_OBJC_MESSAGE_EXPR;
1430 }
1431 
1432 void ASTStmtWriter::VisitObjCForCollectionStmt(ObjCForCollectionStmt *S) {
1433   VisitStmt(S);
1434   Record.AddStmt(S->getElement());
1435   Record.AddStmt(S->getCollection());
1436   Record.AddStmt(S->getBody());
1437   Record.AddSourceLocation(S->getForLoc());
1438   Record.AddSourceLocation(S->getRParenLoc());
1439   Code = serialization::STMT_OBJC_FOR_COLLECTION;
1440 }
1441 
1442 void ASTStmtWriter::VisitObjCAtCatchStmt(ObjCAtCatchStmt *S) {
1443   VisitStmt(S);
1444   Record.AddStmt(S->getCatchBody());
1445   Record.AddDeclRef(S->getCatchParamDecl());
1446   Record.AddSourceLocation(S->getAtCatchLoc());
1447   Record.AddSourceLocation(S->getRParenLoc());
1448   Code = serialization::STMT_OBJC_CATCH;
1449 }
1450 
1451 void ASTStmtWriter::VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *S) {
1452   VisitStmt(S);
1453   Record.AddStmt(S->getFinallyBody());
1454   Record.AddSourceLocation(S->getAtFinallyLoc());
1455   Code = serialization::STMT_OBJC_FINALLY;
1456 }
1457 
1458 void ASTStmtWriter::VisitObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S) {
1459   VisitStmt(S); // FIXME: no test coverage.
1460   Record.AddStmt(S->getSubStmt());
1461   Record.AddSourceLocation(S->getAtLoc());
1462   Code = serialization::STMT_OBJC_AUTORELEASE_POOL;
1463 }
1464 
1465 void ASTStmtWriter::VisitObjCAtTryStmt(ObjCAtTryStmt *S) {
1466   VisitStmt(S);
1467   Record.push_back(S->getNumCatchStmts());
1468   Record.push_back(S->getFinallyStmt() != nullptr);
1469   Record.AddStmt(S->getTryBody());
1470   for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; ++I)
1471     Record.AddStmt(S->getCatchStmt(I));
1472   if (S->getFinallyStmt())
1473     Record.AddStmt(S->getFinallyStmt());
1474   Record.AddSourceLocation(S->getAtTryLoc());
1475   Code = serialization::STMT_OBJC_AT_TRY;
1476 }
1477 
1478 void ASTStmtWriter::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
1479   VisitStmt(S); // FIXME: no test coverage.
1480   Record.AddStmt(S->getSynchExpr());
1481   Record.AddStmt(S->getSynchBody());
1482   Record.AddSourceLocation(S->getAtSynchronizedLoc());
1483   Code = serialization::STMT_OBJC_AT_SYNCHRONIZED;
1484 }
1485 
1486 void ASTStmtWriter::VisitObjCAtThrowStmt(ObjCAtThrowStmt *S) {
1487   VisitStmt(S); // FIXME: no test coverage.
1488   Record.AddStmt(S->getThrowExpr());
1489   Record.AddSourceLocation(S->getThrowLoc());
1490   Code = serialization::STMT_OBJC_AT_THROW;
1491 }
1492 
1493 void ASTStmtWriter::VisitObjCBoolLiteralExpr(ObjCBoolLiteralExpr *E) {
1494   VisitExpr(E);
1495   Record.push_back(E->getValue());
1496   Record.AddSourceLocation(E->getLocation());
1497   Code = serialization::EXPR_OBJC_BOOL_LITERAL;
1498 }
1499 
1500 void ASTStmtWriter::VisitObjCAvailabilityCheckExpr(ObjCAvailabilityCheckExpr *E) {
1501   VisitExpr(E);
1502   Record.AddSourceRange(E->getSourceRange());
1503   Record.AddVersionTuple(E->getVersion());
1504   Code = serialization::EXPR_OBJC_AVAILABILITY_CHECK;
1505 }
1506 
1507 //===----------------------------------------------------------------------===//
1508 // C++ Expressions and Statements.
1509 //===----------------------------------------------------------------------===//
1510 
1511 void ASTStmtWriter::VisitCXXCatchStmt(CXXCatchStmt *S) {
1512   VisitStmt(S);
1513   Record.AddSourceLocation(S->getCatchLoc());
1514   Record.AddDeclRef(S->getExceptionDecl());
1515   Record.AddStmt(S->getHandlerBlock());
1516   Code = serialization::STMT_CXX_CATCH;
1517 }
1518 
1519 void ASTStmtWriter::VisitCXXTryStmt(CXXTryStmt *S) {
1520   VisitStmt(S);
1521   Record.push_back(S->getNumHandlers());
1522   Record.AddSourceLocation(S->getTryLoc());
1523   Record.AddStmt(S->getTryBlock());
1524   for (unsigned i = 0, e = S->getNumHandlers(); i != e; ++i)
1525     Record.AddStmt(S->getHandler(i));
1526   Code = serialization::STMT_CXX_TRY;
1527 }
1528 
1529 void ASTStmtWriter::VisitCXXForRangeStmt(CXXForRangeStmt *S) {
1530   VisitStmt(S);
1531   Record.AddSourceLocation(S->getForLoc());
1532   Record.AddSourceLocation(S->getCoawaitLoc());
1533   Record.AddSourceLocation(S->getColonLoc());
1534   Record.AddSourceLocation(S->getRParenLoc());
1535   Record.AddStmt(S->getInit());
1536   Record.AddStmt(S->getRangeStmt());
1537   Record.AddStmt(S->getBeginStmt());
1538   Record.AddStmt(S->getEndStmt());
1539   Record.AddStmt(S->getCond());
1540   Record.AddStmt(S->getInc());
1541   Record.AddStmt(S->getLoopVarStmt());
1542   Record.AddStmt(S->getBody());
1543   Code = serialization::STMT_CXX_FOR_RANGE;
1544 }
1545 
1546 void ASTStmtWriter::VisitMSDependentExistsStmt(MSDependentExistsStmt *S) {
1547   VisitStmt(S);
1548   Record.AddSourceLocation(S->getKeywordLoc());
1549   Record.push_back(S->isIfExists());
1550   Record.AddNestedNameSpecifierLoc(S->getQualifierLoc());
1551   Record.AddDeclarationNameInfo(S->getNameInfo());
1552   Record.AddStmt(S->getSubStmt());
1553   Code = serialization::STMT_MS_DEPENDENT_EXISTS;
1554 }
1555 
1556 void ASTStmtWriter::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *E) {
1557   VisitCallExpr(E);
1558   Record.push_back(E->getOperator());
1559   Record.AddSourceRange(E->Range);
1560   Code = serialization::EXPR_CXX_OPERATOR_CALL;
1561 }
1562 
1563 void ASTStmtWriter::VisitCXXMemberCallExpr(CXXMemberCallExpr *E) {
1564   VisitCallExpr(E);
1565   Code = serialization::EXPR_CXX_MEMBER_CALL;
1566 }
1567 
1568 void ASTStmtWriter::VisitCXXRewrittenBinaryOperator(
1569     CXXRewrittenBinaryOperator *E) {
1570   VisitExpr(E);
1571   Record.push_back(E->isReversed());
1572   Record.AddStmt(E->getSemanticForm());
1573   Code = serialization::EXPR_CXX_REWRITTEN_BINARY_OPERATOR;
1574 }
1575 
1576 void ASTStmtWriter::VisitCXXConstructExpr(CXXConstructExpr *E) {
1577   VisitExpr(E);
1578 
1579   Record.push_back(E->getNumArgs());
1580   Record.push_back(E->isElidable());
1581   Record.push_back(E->hadMultipleCandidates());
1582   Record.push_back(E->isListInitialization());
1583   Record.push_back(E->isStdInitListInitialization());
1584   Record.push_back(E->requiresZeroInitialization());
1585   Record.push_back(E->getConstructionKind()); // FIXME: stable encoding
1586   Record.AddSourceLocation(E->getLocation());
1587   Record.AddDeclRef(E->getConstructor());
1588   Record.AddSourceRange(E->getParenOrBraceRange());
1589 
1590   for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
1591     Record.AddStmt(E->getArg(I));
1592 
1593   Code = serialization::EXPR_CXX_CONSTRUCT;
1594 }
1595 
1596 void ASTStmtWriter::VisitCXXInheritedCtorInitExpr(CXXInheritedCtorInitExpr *E) {
1597   VisitExpr(E);
1598   Record.AddDeclRef(E->getConstructor());
1599   Record.AddSourceLocation(E->getLocation());
1600   Record.push_back(E->constructsVBase());
1601   Record.push_back(E->inheritedFromVBase());
1602   Code = serialization::EXPR_CXX_INHERITED_CTOR_INIT;
1603 }
1604 
1605 void ASTStmtWriter::VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *E) {
1606   VisitCXXConstructExpr(E);
1607   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1608   Code = serialization::EXPR_CXX_TEMPORARY_OBJECT;
1609 }
1610 
1611 void ASTStmtWriter::VisitLambdaExpr(LambdaExpr *E) {
1612   VisitExpr(E);
1613   Record.push_back(E->LambdaExprBits.NumCaptures);
1614   Record.AddSourceRange(E->IntroducerRange);
1615   Record.push_back(E->LambdaExprBits.CaptureDefault); // FIXME: stable encoding
1616   Record.AddSourceLocation(E->CaptureDefaultLoc);
1617   Record.push_back(E->LambdaExprBits.ExplicitParams);
1618   Record.push_back(E->LambdaExprBits.ExplicitResultType);
1619   Record.AddSourceLocation(E->ClosingBrace);
1620 
1621   // Add capture initializers.
1622   for (LambdaExpr::capture_init_iterator C = E->capture_init_begin(),
1623                                       CEnd = E->capture_init_end();
1624        C != CEnd; ++C) {
1625     Record.AddStmt(*C);
1626   }
1627 
1628   // Don't serialize the body. It belongs to the call operator declaration.
1629   // LambdaExpr only stores a copy of the Stmt *.
1630 
1631   Code = serialization::EXPR_LAMBDA;
1632 }
1633 
1634 void ASTStmtWriter::VisitCXXStdInitializerListExpr(CXXStdInitializerListExpr *E) {
1635   VisitExpr(E);
1636   Record.AddStmt(E->getSubExpr());
1637   Code = serialization::EXPR_CXX_STD_INITIALIZER_LIST;
1638 }
1639 
1640 void ASTStmtWriter::VisitCXXNamedCastExpr(CXXNamedCastExpr *E) {
1641   VisitExplicitCastExpr(E);
1642   Record.AddSourceRange(SourceRange(E->getOperatorLoc(), E->getRParenLoc()));
1643   Record.AddSourceRange(E->getAngleBrackets());
1644 }
1645 
1646 void ASTStmtWriter::VisitCXXStaticCastExpr(CXXStaticCastExpr *E) {
1647   VisitCXXNamedCastExpr(E);
1648   Code = serialization::EXPR_CXX_STATIC_CAST;
1649 }
1650 
1651 void ASTStmtWriter::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *E) {
1652   VisitCXXNamedCastExpr(E);
1653   Code = serialization::EXPR_CXX_DYNAMIC_CAST;
1654 }
1655 
1656 void ASTStmtWriter::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *E) {
1657   VisitCXXNamedCastExpr(E);
1658   Code = serialization::EXPR_CXX_REINTERPRET_CAST;
1659 }
1660 
1661 void ASTStmtWriter::VisitCXXConstCastExpr(CXXConstCastExpr *E) {
1662   VisitCXXNamedCastExpr(E);
1663   Code = serialization::EXPR_CXX_CONST_CAST;
1664 }
1665 
1666 void ASTStmtWriter::VisitCXXAddrspaceCastExpr(CXXAddrspaceCastExpr *E) {
1667   VisitCXXNamedCastExpr(E);
1668   Code = serialization::EXPR_CXX_ADDRSPACE_CAST;
1669 }
1670 
1671 void ASTStmtWriter::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *E) {
1672   VisitExplicitCastExpr(E);
1673   Record.AddSourceLocation(E->getLParenLoc());
1674   Record.AddSourceLocation(E->getRParenLoc());
1675   Code = serialization::EXPR_CXX_FUNCTIONAL_CAST;
1676 }
1677 
1678 void ASTStmtWriter::VisitBuiltinBitCastExpr(BuiltinBitCastExpr *E) {
1679   VisitExplicitCastExpr(E);
1680   Record.AddSourceLocation(E->getBeginLoc());
1681   Record.AddSourceLocation(E->getEndLoc());
1682   Code = serialization::EXPR_BUILTIN_BIT_CAST;
1683 }
1684 
1685 void ASTStmtWriter::VisitUserDefinedLiteral(UserDefinedLiteral *E) {
1686   VisitCallExpr(E);
1687   Record.AddSourceLocation(E->UDSuffixLoc);
1688   Code = serialization::EXPR_USER_DEFINED_LITERAL;
1689 }
1690 
1691 void ASTStmtWriter::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *E) {
1692   VisitExpr(E);
1693   Record.push_back(E->getValue());
1694   Record.AddSourceLocation(E->getLocation());
1695   Code = serialization::EXPR_CXX_BOOL_LITERAL;
1696 }
1697 
1698 void ASTStmtWriter::VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *E) {
1699   VisitExpr(E);
1700   Record.AddSourceLocation(E->getLocation());
1701   Code = serialization::EXPR_CXX_NULL_PTR_LITERAL;
1702 }
1703 
1704 void ASTStmtWriter::VisitCXXTypeidExpr(CXXTypeidExpr *E) {
1705   VisitExpr(E);
1706   Record.AddSourceRange(E->getSourceRange());
1707   if (E->isTypeOperand()) {
1708     Record.AddTypeSourceInfo(E->getTypeOperandSourceInfo());
1709     Code = serialization::EXPR_CXX_TYPEID_TYPE;
1710   } else {
1711     Record.AddStmt(E->getExprOperand());
1712     Code = serialization::EXPR_CXX_TYPEID_EXPR;
1713   }
1714 }
1715 
1716 void ASTStmtWriter::VisitCXXThisExpr(CXXThisExpr *E) {
1717   VisitExpr(E);
1718   Record.AddSourceLocation(E->getLocation());
1719   Record.push_back(E->isImplicit());
1720   Code = serialization::EXPR_CXX_THIS;
1721 }
1722 
1723 void ASTStmtWriter::VisitCXXThrowExpr(CXXThrowExpr *E) {
1724   VisitExpr(E);
1725   Record.AddSourceLocation(E->getThrowLoc());
1726   Record.AddStmt(E->getSubExpr());
1727   Record.push_back(E->isThrownVariableInScope());
1728   Code = serialization::EXPR_CXX_THROW;
1729 }
1730 
1731 void ASTStmtWriter::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *E) {
1732   VisitExpr(E);
1733   Record.AddDeclRef(E->getParam());
1734   Record.AddDeclRef(cast_or_null<Decl>(E->getUsedContext()));
1735   Record.AddSourceLocation(E->getUsedLocation());
1736   Code = serialization::EXPR_CXX_DEFAULT_ARG;
1737 }
1738 
1739 void ASTStmtWriter::VisitCXXDefaultInitExpr(CXXDefaultInitExpr *E) {
1740   VisitExpr(E);
1741   Record.AddDeclRef(E->getField());
1742   Record.AddDeclRef(cast_or_null<Decl>(E->getUsedContext()));
1743   Record.AddSourceLocation(E->getExprLoc());
1744   Code = serialization::EXPR_CXX_DEFAULT_INIT;
1745 }
1746 
1747 void ASTStmtWriter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) {
1748   VisitExpr(E);
1749   Record.AddCXXTemporary(E->getTemporary());
1750   Record.AddStmt(E->getSubExpr());
1751   Code = serialization::EXPR_CXX_BIND_TEMPORARY;
1752 }
1753 
1754 void ASTStmtWriter::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) {
1755   VisitExpr(E);
1756   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1757   Record.AddSourceLocation(E->getRParenLoc());
1758   Code = serialization::EXPR_CXX_SCALAR_VALUE_INIT;
1759 }
1760 
1761 void ASTStmtWriter::VisitCXXNewExpr(CXXNewExpr *E) {
1762   VisitExpr(E);
1763 
1764   Record.push_back(E->isArray());
1765   Record.push_back(E->hasInitializer());
1766   Record.push_back(E->getNumPlacementArgs());
1767   Record.push_back(E->isParenTypeId());
1768 
1769   Record.push_back(E->isGlobalNew());
1770   Record.push_back(E->passAlignment());
1771   Record.push_back(E->doesUsualArrayDeleteWantSize());
1772   Record.push_back(E->CXXNewExprBits.StoredInitializationStyle);
1773 
1774   Record.AddDeclRef(E->getOperatorNew());
1775   Record.AddDeclRef(E->getOperatorDelete());
1776   Record.AddTypeSourceInfo(E->getAllocatedTypeSourceInfo());
1777   if (E->isParenTypeId())
1778     Record.AddSourceRange(E->getTypeIdParens());
1779   Record.AddSourceRange(E->getSourceRange());
1780   Record.AddSourceRange(E->getDirectInitRange());
1781 
1782   for (CXXNewExpr::arg_iterator I = E->raw_arg_begin(), N = E->raw_arg_end();
1783        I != N; ++I)
1784     Record.AddStmt(*I);
1785 
1786   Code = serialization::EXPR_CXX_NEW;
1787 }
1788 
1789 void ASTStmtWriter::VisitCXXDeleteExpr(CXXDeleteExpr *E) {
1790   VisitExpr(E);
1791   Record.push_back(E->isGlobalDelete());
1792   Record.push_back(E->isArrayForm());
1793   Record.push_back(E->isArrayFormAsWritten());
1794   Record.push_back(E->doesUsualArrayDeleteWantSize());
1795   Record.AddDeclRef(E->getOperatorDelete());
1796   Record.AddStmt(E->getArgument());
1797   Record.AddSourceLocation(E->getBeginLoc());
1798 
1799   Code = serialization::EXPR_CXX_DELETE;
1800 }
1801 
1802 void ASTStmtWriter::VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E) {
1803   VisitExpr(E);
1804 
1805   Record.AddStmt(E->getBase());
1806   Record.push_back(E->isArrow());
1807   Record.AddSourceLocation(E->getOperatorLoc());
1808   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1809   Record.AddTypeSourceInfo(E->getScopeTypeInfo());
1810   Record.AddSourceLocation(E->getColonColonLoc());
1811   Record.AddSourceLocation(E->getTildeLoc());
1812 
1813   // PseudoDestructorTypeStorage.
1814   Record.AddIdentifierRef(E->getDestroyedTypeIdentifier());
1815   if (E->getDestroyedTypeIdentifier())
1816     Record.AddSourceLocation(E->getDestroyedTypeLoc());
1817   else
1818     Record.AddTypeSourceInfo(E->getDestroyedTypeInfo());
1819 
1820   Code = serialization::EXPR_CXX_PSEUDO_DESTRUCTOR;
1821 }
1822 
1823 void ASTStmtWriter::VisitExprWithCleanups(ExprWithCleanups *E) {
1824   VisitExpr(E);
1825   Record.push_back(E->getNumObjects());
1826   for (auto &Obj : E->getObjects()) {
1827     if (auto *BD = Obj.dyn_cast<BlockDecl *>()) {
1828       Record.push_back(serialization::COK_Block);
1829       Record.AddDeclRef(BD);
1830     } else if (auto *CLE = Obj.dyn_cast<CompoundLiteralExpr *>()) {
1831       Record.push_back(serialization::COK_CompoundLiteral);
1832       Record.AddStmt(CLE);
1833     }
1834   }
1835 
1836   Record.push_back(E->cleanupsHaveSideEffects());
1837   Record.AddStmt(E->getSubExpr());
1838   Code = serialization::EXPR_EXPR_WITH_CLEANUPS;
1839 }
1840 
1841 void ASTStmtWriter::VisitCXXDependentScopeMemberExpr(
1842     CXXDependentScopeMemberExpr *E) {
1843   VisitExpr(E);
1844 
1845   // Don't emit anything here (or if you do you will have to update
1846   // the corresponding deserialization function).
1847 
1848   Record.push_back(E->hasTemplateKWAndArgsInfo());
1849   Record.push_back(E->getNumTemplateArgs());
1850   Record.push_back(E->hasFirstQualifierFoundInScope());
1851 
1852   if (E->hasTemplateKWAndArgsInfo()) {
1853     const ASTTemplateKWAndArgsInfo &ArgInfo =
1854         *E->getTrailingObjects<ASTTemplateKWAndArgsInfo>();
1855     AddTemplateKWAndArgsInfo(ArgInfo,
1856                              E->getTrailingObjects<TemplateArgumentLoc>());
1857   }
1858 
1859   Record.push_back(E->isArrow());
1860   Record.AddSourceLocation(E->getOperatorLoc());
1861   Record.AddTypeRef(E->getBaseType());
1862   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1863   if (!E->isImplicitAccess())
1864     Record.AddStmt(E->getBase());
1865   else
1866     Record.AddStmt(nullptr);
1867 
1868   if (E->hasFirstQualifierFoundInScope())
1869     Record.AddDeclRef(E->getFirstQualifierFoundInScope());
1870 
1871   Record.AddDeclarationNameInfo(E->MemberNameInfo);
1872   Code = serialization::EXPR_CXX_DEPENDENT_SCOPE_MEMBER;
1873 }
1874 
1875 void
1876 ASTStmtWriter::VisitDependentScopeDeclRefExpr(DependentScopeDeclRefExpr *E) {
1877   VisitExpr(E);
1878 
1879   // Don't emit anything here, HasTemplateKWAndArgsInfo must be
1880   // emitted first.
1881 
1882   Record.push_back(E->DependentScopeDeclRefExprBits.HasTemplateKWAndArgsInfo);
1883   if (E->DependentScopeDeclRefExprBits.HasTemplateKWAndArgsInfo) {
1884     const ASTTemplateKWAndArgsInfo &ArgInfo =
1885         *E->getTrailingObjects<ASTTemplateKWAndArgsInfo>();
1886     Record.push_back(ArgInfo.NumTemplateArgs);
1887     AddTemplateKWAndArgsInfo(ArgInfo,
1888                              E->getTrailingObjects<TemplateArgumentLoc>());
1889   }
1890 
1891   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1892   Record.AddDeclarationNameInfo(E->NameInfo);
1893   Code = serialization::EXPR_CXX_DEPENDENT_SCOPE_DECL_REF;
1894 }
1895 
1896 void
1897 ASTStmtWriter::VisitCXXUnresolvedConstructExpr(CXXUnresolvedConstructExpr *E) {
1898   VisitExpr(E);
1899   Record.push_back(E->arg_size());
1900   for (CXXUnresolvedConstructExpr::arg_iterator
1901          ArgI = E->arg_begin(), ArgE = E->arg_end(); ArgI != ArgE; ++ArgI)
1902     Record.AddStmt(*ArgI);
1903   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1904   Record.AddSourceLocation(E->getLParenLoc());
1905   Record.AddSourceLocation(E->getRParenLoc());
1906   Code = serialization::EXPR_CXX_UNRESOLVED_CONSTRUCT;
1907 }
1908 
1909 void ASTStmtWriter::VisitOverloadExpr(OverloadExpr *E) {
1910   VisitExpr(E);
1911 
1912   Record.push_back(E->getNumDecls());
1913   Record.push_back(E->hasTemplateKWAndArgsInfo());
1914   if (E->hasTemplateKWAndArgsInfo()) {
1915     const ASTTemplateKWAndArgsInfo &ArgInfo =
1916         *E->getTrailingASTTemplateKWAndArgsInfo();
1917     Record.push_back(ArgInfo.NumTemplateArgs);
1918     AddTemplateKWAndArgsInfo(ArgInfo, E->getTrailingTemplateArgumentLoc());
1919   }
1920 
1921   for (OverloadExpr::decls_iterator OvI = E->decls_begin(),
1922                                     OvE = E->decls_end();
1923        OvI != OvE; ++OvI) {
1924     Record.AddDeclRef(OvI.getDecl());
1925     Record.push_back(OvI.getAccess());
1926   }
1927 
1928   Record.AddDeclarationNameInfo(E->getNameInfo());
1929   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1930 }
1931 
1932 void ASTStmtWriter::VisitUnresolvedMemberExpr(UnresolvedMemberExpr *E) {
1933   VisitOverloadExpr(E);
1934   Record.push_back(E->isArrow());
1935   Record.push_back(E->hasUnresolvedUsing());
1936   Record.AddStmt(!E->isImplicitAccess() ? E->getBase() : nullptr);
1937   Record.AddTypeRef(E->getBaseType());
1938   Record.AddSourceLocation(E->getOperatorLoc());
1939   Code = serialization::EXPR_CXX_UNRESOLVED_MEMBER;
1940 }
1941 
1942 void ASTStmtWriter::VisitUnresolvedLookupExpr(UnresolvedLookupExpr *E) {
1943   VisitOverloadExpr(E);
1944   Record.push_back(E->requiresADL());
1945   Record.push_back(E->isOverloaded());
1946   Record.AddDeclRef(E->getNamingClass());
1947   Code = serialization::EXPR_CXX_UNRESOLVED_LOOKUP;
1948 }
1949 
1950 void ASTStmtWriter::VisitTypeTraitExpr(TypeTraitExpr *E) {
1951   VisitExpr(E);
1952   Record.push_back(E->TypeTraitExprBits.NumArgs);
1953   Record.push_back(E->TypeTraitExprBits.Kind); // FIXME: Stable encoding
1954   Record.push_back(E->TypeTraitExprBits.Value);
1955   Record.AddSourceRange(E->getSourceRange());
1956   for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
1957     Record.AddTypeSourceInfo(E->getArg(I));
1958   Code = serialization::EXPR_TYPE_TRAIT;
1959 }
1960 
1961 void ASTStmtWriter::VisitArrayTypeTraitExpr(ArrayTypeTraitExpr *E) {
1962   VisitExpr(E);
1963   Record.push_back(E->getTrait());
1964   Record.push_back(E->getValue());
1965   Record.AddSourceRange(E->getSourceRange());
1966   Record.AddTypeSourceInfo(E->getQueriedTypeSourceInfo());
1967   Record.AddStmt(E->getDimensionExpression());
1968   Code = serialization::EXPR_ARRAY_TYPE_TRAIT;
1969 }
1970 
1971 void ASTStmtWriter::VisitExpressionTraitExpr(ExpressionTraitExpr *E) {
1972   VisitExpr(E);
1973   Record.push_back(E->getTrait());
1974   Record.push_back(E->getValue());
1975   Record.AddSourceRange(E->getSourceRange());
1976   Record.AddStmt(E->getQueriedExpression());
1977   Code = serialization::EXPR_CXX_EXPRESSION_TRAIT;
1978 }
1979 
1980 void ASTStmtWriter::VisitCXXNoexceptExpr(CXXNoexceptExpr *E) {
1981   VisitExpr(E);
1982   Record.push_back(E->getValue());
1983   Record.AddSourceRange(E->getSourceRange());
1984   Record.AddStmt(E->getOperand());
1985   Code = serialization::EXPR_CXX_NOEXCEPT;
1986 }
1987 
1988 void ASTStmtWriter::VisitPackExpansionExpr(PackExpansionExpr *E) {
1989   VisitExpr(E);
1990   Record.AddSourceLocation(E->getEllipsisLoc());
1991   Record.push_back(E->NumExpansions);
1992   Record.AddStmt(E->getPattern());
1993   Code = serialization::EXPR_PACK_EXPANSION;
1994 }
1995 
1996 void ASTStmtWriter::VisitSizeOfPackExpr(SizeOfPackExpr *E) {
1997   VisitExpr(E);
1998   Record.push_back(E->isPartiallySubstituted() ? E->getPartialArguments().size()
1999                                                : 0);
2000   Record.AddSourceLocation(E->OperatorLoc);
2001   Record.AddSourceLocation(E->PackLoc);
2002   Record.AddSourceLocation(E->RParenLoc);
2003   Record.AddDeclRef(E->Pack);
2004   if (E->isPartiallySubstituted()) {
2005     for (const auto &TA : E->getPartialArguments())
2006       Record.AddTemplateArgument(TA);
2007   } else if (!E->isValueDependent()) {
2008     Record.push_back(E->getPackLength());
2009   }
2010   Code = serialization::EXPR_SIZEOF_PACK;
2011 }
2012 
2013 void ASTStmtWriter::VisitSubstNonTypeTemplateParmExpr(
2014                                               SubstNonTypeTemplateParmExpr *E) {
2015   VisitExpr(E);
2016   Record.AddDeclRef(E->getParameter());
2017   Record.AddSourceLocation(E->getNameLoc());
2018   Record.AddStmt(E->getReplacement());
2019   Code = serialization::EXPR_SUBST_NON_TYPE_TEMPLATE_PARM;
2020 }
2021 
2022 void ASTStmtWriter::VisitSubstNonTypeTemplateParmPackExpr(
2023                                           SubstNonTypeTemplateParmPackExpr *E) {
2024   VisitExpr(E);
2025   Record.AddDeclRef(E->getParameterPack());
2026   Record.AddTemplateArgument(E->getArgumentPack());
2027   Record.AddSourceLocation(E->getParameterPackLocation());
2028   Code = serialization::EXPR_SUBST_NON_TYPE_TEMPLATE_PARM_PACK;
2029 }
2030 
2031 void ASTStmtWriter::VisitFunctionParmPackExpr(FunctionParmPackExpr *E) {
2032   VisitExpr(E);
2033   Record.push_back(E->getNumExpansions());
2034   Record.AddDeclRef(E->getParameterPack());
2035   Record.AddSourceLocation(E->getParameterPackLocation());
2036   for (FunctionParmPackExpr::iterator I = E->begin(), End = E->end();
2037        I != End; ++I)
2038     Record.AddDeclRef(*I);
2039   Code = serialization::EXPR_FUNCTION_PARM_PACK;
2040 }
2041 
2042 void ASTStmtWriter::VisitMaterializeTemporaryExpr(MaterializeTemporaryExpr *E) {
2043   VisitExpr(E);
2044   Record.push_back(static_cast<bool>(E->getLifetimeExtendedTemporaryDecl()));
2045   if (E->getLifetimeExtendedTemporaryDecl())
2046     Record.AddDeclRef(E->getLifetimeExtendedTemporaryDecl());
2047   else
2048     Record.AddStmt(E->getSubExpr());
2049   Code = serialization::EXPR_MATERIALIZE_TEMPORARY;
2050 }
2051 
2052 void ASTStmtWriter::VisitCXXFoldExpr(CXXFoldExpr *E) {
2053   VisitExpr(E);
2054   Record.AddSourceLocation(E->LParenLoc);
2055   Record.AddSourceLocation(E->EllipsisLoc);
2056   Record.AddSourceLocation(E->RParenLoc);
2057   Record.push_back(E->NumExpansions);
2058   Record.AddStmt(E->SubExprs[0]);
2059   Record.AddStmt(E->SubExprs[1]);
2060   Record.AddStmt(E->SubExprs[2]);
2061   Record.push_back(E->Opcode);
2062   Code = serialization::EXPR_CXX_FOLD;
2063 }
2064 
2065 void ASTStmtWriter::VisitOpaqueValueExpr(OpaqueValueExpr *E) {
2066   VisitExpr(E);
2067   Record.AddStmt(E->getSourceExpr());
2068   Record.AddSourceLocation(E->getLocation());
2069   Record.push_back(E->isUnique());
2070   Code = serialization::EXPR_OPAQUE_VALUE;
2071 }
2072 
2073 void ASTStmtWriter::VisitTypoExpr(TypoExpr *E) {
2074   VisitExpr(E);
2075   // TODO: Figure out sane writer behavior for a TypoExpr, if necessary
2076   llvm_unreachable("Cannot write TypoExpr nodes");
2077 }
2078 
2079 //===----------------------------------------------------------------------===//
2080 // CUDA Expressions and Statements.
2081 //===----------------------------------------------------------------------===//
2082 
2083 void ASTStmtWriter::VisitCUDAKernelCallExpr(CUDAKernelCallExpr *E) {
2084   VisitCallExpr(E);
2085   Record.AddStmt(E->getConfig());
2086   Code = serialization::EXPR_CUDA_KERNEL_CALL;
2087 }
2088 
2089 //===----------------------------------------------------------------------===//
2090 // OpenCL Expressions and Statements.
2091 //===----------------------------------------------------------------------===//
2092 void ASTStmtWriter::VisitAsTypeExpr(AsTypeExpr *E) {
2093   VisitExpr(E);
2094   Record.AddSourceLocation(E->getBuiltinLoc());
2095   Record.AddSourceLocation(E->getRParenLoc());
2096   Record.AddStmt(E->getSrcExpr());
2097   Code = serialization::EXPR_ASTYPE;
2098 }
2099 
2100 //===----------------------------------------------------------------------===//
2101 // Microsoft Expressions and Statements.
2102 //===----------------------------------------------------------------------===//
2103 void ASTStmtWriter::VisitMSPropertyRefExpr(MSPropertyRefExpr *E) {
2104   VisitExpr(E);
2105   Record.push_back(E->isArrow());
2106   Record.AddStmt(E->getBaseExpr());
2107   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
2108   Record.AddSourceLocation(E->getMemberLoc());
2109   Record.AddDeclRef(E->getPropertyDecl());
2110   Code = serialization::EXPR_CXX_PROPERTY_REF_EXPR;
2111 }
2112 
2113 void ASTStmtWriter::VisitMSPropertySubscriptExpr(MSPropertySubscriptExpr *E) {
2114   VisitExpr(E);
2115   Record.AddStmt(E->getBase());
2116   Record.AddStmt(E->getIdx());
2117   Record.AddSourceLocation(E->getRBracketLoc());
2118   Code = serialization::EXPR_CXX_PROPERTY_SUBSCRIPT_EXPR;
2119 }
2120 
2121 void ASTStmtWriter::VisitCXXUuidofExpr(CXXUuidofExpr *E) {
2122   VisitExpr(E);
2123   Record.AddSourceRange(E->getSourceRange());
2124   Record.AddDeclRef(E->getGuidDecl());
2125   if (E->isTypeOperand()) {
2126     Record.AddTypeSourceInfo(E->getTypeOperandSourceInfo());
2127     Code = serialization::EXPR_CXX_UUIDOF_TYPE;
2128   } else {
2129     Record.AddStmt(E->getExprOperand());
2130     Code = serialization::EXPR_CXX_UUIDOF_EXPR;
2131   }
2132 }
2133 
2134 void ASTStmtWriter::VisitSEHExceptStmt(SEHExceptStmt *S) {
2135   VisitStmt(S);
2136   Record.AddSourceLocation(S->getExceptLoc());
2137   Record.AddStmt(S->getFilterExpr());
2138   Record.AddStmt(S->getBlock());
2139   Code = serialization::STMT_SEH_EXCEPT;
2140 }
2141 
2142 void ASTStmtWriter::VisitSEHFinallyStmt(SEHFinallyStmt *S) {
2143   VisitStmt(S);
2144   Record.AddSourceLocation(S->getFinallyLoc());
2145   Record.AddStmt(S->getBlock());
2146   Code = serialization::STMT_SEH_FINALLY;
2147 }
2148 
2149 void ASTStmtWriter::VisitSEHTryStmt(SEHTryStmt *S) {
2150   VisitStmt(S);
2151   Record.push_back(S->getIsCXXTry());
2152   Record.AddSourceLocation(S->getTryLoc());
2153   Record.AddStmt(S->getTryBlock());
2154   Record.AddStmt(S->getHandler());
2155   Code = serialization::STMT_SEH_TRY;
2156 }
2157 
2158 void ASTStmtWriter::VisitSEHLeaveStmt(SEHLeaveStmt *S) {
2159   VisitStmt(S);
2160   Record.AddSourceLocation(S->getLeaveLoc());
2161   Code = serialization::STMT_SEH_LEAVE;
2162 }
2163 
2164 //===----------------------------------------------------------------------===//
2165 // OpenMP Directives.
2166 //===----------------------------------------------------------------------===//
2167 
2168 void ASTStmtWriter::VisitOMPExecutableDirective(OMPExecutableDirective *E) {
2169   Record.writeOMPChildren(E->Data);
2170   Record.AddSourceLocation(E->getBeginLoc());
2171   Record.AddSourceLocation(E->getEndLoc());
2172 }
2173 
2174 void ASTStmtWriter::VisitOMPLoopDirective(OMPLoopDirective *D) {
2175   VisitStmt(D);
2176   Record.writeUInt32(D->getCollapsedNumber());
2177   VisitOMPExecutableDirective(D);
2178 }
2179 
2180 void ASTStmtWriter::VisitOMPParallelDirective(OMPParallelDirective *D) {
2181   VisitStmt(D);
2182   VisitOMPExecutableDirective(D);
2183   Record.writeBool(D->hasCancel());
2184   Code = serialization::STMT_OMP_PARALLEL_DIRECTIVE;
2185 }
2186 
2187 void ASTStmtWriter::VisitOMPSimdDirective(OMPSimdDirective *D) {
2188   VisitOMPLoopDirective(D);
2189   Code = serialization::STMT_OMP_SIMD_DIRECTIVE;
2190 }
2191 
2192 void ASTStmtWriter::VisitOMPForDirective(OMPForDirective *D) {
2193   VisitOMPLoopDirective(D);
2194   Record.writeBool(D->hasCancel());
2195   Code = serialization::STMT_OMP_FOR_DIRECTIVE;
2196 }
2197 
2198 void ASTStmtWriter::VisitOMPForSimdDirective(OMPForSimdDirective *D) {
2199   VisitOMPLoopDirective(D);
2200   Code = serialization::STMT_OMP_FOR_SIMD_DIRECTIVE;
2201 }
2202 
2203 void ASTStmtWriter::VisitOMPSectionsDirective(OMPSectionsDirective *D) {
2204   VisitStmt(D);
2205   VisitOMPExecutableDirective(D);
2206   Record.writeBool(D->hasCancel());
2207   Code = serialization::STMT_OMP_SECTIONS_DIRECTIVE;
2208 }
2209 
2210 void ASTStmtWriter::VisitOMPSectionDirective(OMPSectionDirective *D) {
2211   VisitStmt(D);
2212   VisitOMPExecutableDirective(D);
2213   Record.writeBool(D->hasCancel());
2214   Code = serialization::STMT_OMP_SECTION_DIRECTIVE;
2215 }
2216 
2217 void ASTStmtWriter::VisitOMPSingleDirective(OMPSingleDirective *D) {
2218   VisitStmt(D);
2219   VisitOMPExecutableDirective(D);
2220   Code = serialization::STMT_OMP_SINGLE_DIRECTIVE;
2221 }
2222 
2223 void ASTStmtWriter::VisitOMPMasterDirective(OMPMasterDirective *D) {
2224   VisitStmt(D);
2225   VisitOMPExecutableDirective(D);
2226   Code = serialization::STMT_OMP_MASTER_DIRECTIVE;
2227 }
2228 
2229 void ASTStmtWriter::VisitOMPCriticalDirective(OMPCriticalDirective *D) {
2230   VisitStmt(D);
2231   VisitOMPExecutableDirective(D);
2232   Record.AddDeclarationNameInfo(D->getDirectiveName());
2233   Code = serialization::STMT_OMP_CRITICAL_DIRECTIVE;
2234 }
2235 
2236 void ASTStmtWriter::VisitOMPParallelForDirective(OMPParallelForDirective *D) {
2237   VisitOMPLoopDirective(D);
2238   Record.writeBool(D->hasCancel());
2239   Code = serialization::STMT_OMP_PARALLEL_FOR_DIRECTIVE;
2240 }
2241 
2242 void ASTStmtWriter::VisitOMPParallelForSimdDirective(
2243     OMPParallelForSimdDirective *D) {
2244   VisitOMPLoopDirective(D);
2245   Code = serialization::STMT_OMP_PARALLEL_FOR_SIMD_DIRECTIVE;
2246 }
2247 
2248 void ASTStmtWriter::VisitOMPParallelMasterDirective(
2249     OMPParallelMasterDirective *D) {
2250   VisitStmt(D);
2251   VisitOMPExecutableDirective(D);
2252   Code = serialization::STMT_OMP_PARALLEL_MASTER_DIRECTIVE;
2253 }
2254 
2255 void ASTStmtWriter::VisitOMPParallelSectionsDirective(
2256     OMPParallelSectionsDirective *D) {
2257   VisitStmt(D);
2258   VisitOMPExecutableDirective(D);
2259   Record.writeBool(D->hasCancel());
2260   Code = serialization::STMT_OMP_PARALLEL_SECTIONS_DIRECTIVE;
2261 }
2262 
2263 void ASTStmtWriter::VisitOMPTaskDirective(OMPTaskDirective *D) {
2264   VisitStmt(D);
2265   VisitOMPExecutableDirective(D);
2266   Record.writeBool(D->hasCancel());
2267   Code = serialization::STMT_OMP_TASK_DIRECTIVE;
2268 }
2269 
2270 void ASTStmtWriter::VisitOMPAtomicDirective(OMPAtomicDirective *D) {
2271   VisitStmt(D);
2272   VisitOMPExecutableDirective(D);
2273   Record.writeBool(D->isXLHSInRHSPart());
2274   Record.writeBool(D->isPostfixUpdate());
2275   Code = serialization::STMT_OMP_ATOMIC_DIRECTIVE;
2276 }
2277 
2278 void ASTStmtWriter::VisitOMPTargetDirective(OMPTargetDirective *D) {
2279   VisitStmt(D);
2280   VisitOMPExecutableDirective(D);
2281   Code = serialization::STMT_OMP_TARGET_DIRECTIVE;
2282 }
2283 
2284 void ASTStmtWriter::VisitOMPTargetDataDirective(OMPTargetDataDirective *D) {
2285   VisitStmt(D);
2286   VisitOMPExecutableDirective(D);
2287   Code = serialization::STMT_OMP_TARGET_DATA_DIRECTIVE;
2288 }
2289 
2290 void ASTStmtWriter::VisitOMPTargetEnterDataDirective(
2291     OMPTargetEnterDataDirective *D) {
2292   VisitStmt(D);
2293   VisitOMPExecutableDirective(D);
2294   Code = serialization::STMT_OMP_TARGET_ENTER_DATA_DIRECTIVE;
2295 }
2296 
2297 void ASTStmtWriter::VisitOMPTargetExitDataDirective(
2298     OMPTargetExitDataDirective *D) {
2299   VisitStmt(D);
2300   VisitOMPExecutableDirective(D);
2301   Code = serialization::STMT_OMP_TARGET_EXIT_DATA_DIRECTIVE;
2302 }
2303 
2304 void ASTStmtWriter::VisitOMPTargetParallelDirective(
2305     OMPTargetParallelDirective *D) {
2306   VisitStmt(D);
2307   VisitOMPExecutableDirective(D);
2308   Record.writeBool(D->hasCancel());
2309   Code = serialization::STMT_OMP_TARGET_PARALLEL_DIRECTIVE;
2310 }
2311 
2312 void ASTStmtWriter::VisitOMPTargetParallelForDirective(
2313     OMPTargetParallelForDirective *D) {
2314   VisitOMPLoopDirective(D);
2315   Record.writeBool(D->hasCancel());
2316   Code = serialization::STMT_OMP_TARGET_PARALLEL_FOR_DIRECTIVE;
2317 }
2318 
2319 void ASTStmtWriter::VisitOMPTaskyieldDirective(OMPTaskyieldDirective *D) {
2320   VisitStmt(D);
2321   VisitOMPExecutableDirective(D);
2322   Code = serialization::STMT_OMP_TASKYIELD_DIRECTIVE;
2323 }
2324 
2325 void ASTStmtWriter::VisitOMPBarrierDirective(OMPBarrierDirective *D) {
2326   VisitStmt(D);
2327   VisitOMPExecutableDirective(D);
2328   Code = serialization::STMT_OMP_BARRIER_DIRECTIVE;
2329 }
2330 
2331 void ASTStmtWriter::VisitOMPTaskwaitDirective(OMPTaskwaitDirective *D) {
2332   VisitStmt(D);
2333   VisitOMPExecutableDirective(D);
2334   Code = serialization::STMT_OMP_TASKWAIT_DIRECTIVE;
2335 }
2336 
2337 void ASTStmtWriter::VisitOMPTaskgroupDirective(OMPTaskgroupDirective *D) {
2338   VisitStmt(D);
2339   VisitOMPExecutableDirective(D);
2340   Code = serialization::STMT_OMP_TASKGROUP_DIRECTIVE;
2341 }
2342 
2343 void ASTStmtWriter::VisitOMPFlushDirective(OMPFlushDirective *D) {
2344   VisitStmt(D);
2345   VisitOMPExecutableDirective(D);
2346   Code = serialization::STMT_OMP_FLUSH_DIRECTIVE;
2347 }
2348 
2349 void ASTStmtWriter::VisitOMPDepobjDirective(OMPDepobjDirective *D) {
2350   VisitStmt(D);
2351   VisitOMPExecutableDirective(D);
2352   Code = serialization::STMT_OMP_DEPOBJ_DIRECTIVE;
2353 }
2354 
2355 void ASTStmtWriter::VisitOMPScanDirective(OMPScanDirective *D) {
2356   VisitStmt(D);
2357   VisitOMPExecutableDirective(D);
2358   Code = serialization::STMT_OMP_SCAN_DIRECTIVE;
2359 }
2360 
2361 void ASTStmtWriter::VisitOMPOrderedDirective(OMPOrderedDirective *D) {
2362   VisitStmt(D);
2363   VisitOMPExecutableDirective(D);
2364   Code = serialization::STMT_OMP_ORDERED_DIRECTIVE;
2365 }
2366 
2367 void ASTStmtWriter::VisitOMPTeamsDirective(OMPTeamsDirective *D) {
2368   VisitStmt(D);
2369   VisitOMPExecutableDirective(D);
2370   Code = serialization::STMT_OMP_TEAMS_DIRECTIVE;
2371 }
2372 
2373 void ASTStmtWriter::VisitOMPCancellationPointDirective(
2374     OMPCancellationPointDirective *D) {
2375   VisitStmt(D);
2376   VisitOMPExecutableDirective(D);
2377   Record.writeEnum(D->getCancelRegion());
2378   Code = serialization::STMT_OMP_CANCELLATION_POINT_DIRECTIVE;
2379 }
2380 
2381 void ASTStmtWriter::VisitOMPCancelDirective(OMPCancelDirective *D) {
2382   VisitStmt(D);
2383   VisitOMPExecutableDirective(D);
2384   Record.writeEnum(D->getCancelRegion());
2385   Code = serialization::STMT_OMP_CANCEL_DIRECTIVE;
2386 }
2387 
2388 void ASTStmtWriter::VisitOMPTaskLoopDirective(OMPTaskLoopDirective *D) {
2389   VisitOMPLoopDirective(D);
2390   Record.writeBool(D->hasCancel());
2391   Code = serialization::STMT_OMP_TASKLOOP_DIRECTIVE;
2392 }
2393 
2394 void ASTStmtWriter::VisitOMPTaskLoopSimdDirective(OMPTaskLoopSimdDirective *D) {
2395   VisitOMPLoopDirective(D);
2396   Code = serialization::STMT_OMP_TASKLOOP_SIMD_DIRECTIVE;
2397 }
2398 
2399 void ASTStmtWriter::VisitOMPMasterTaskLoopDirective(
2400     OMPMasterTaskLoopDirective *D) {
2401   VisitOMPLoopDirective(D);
2402   Record.writeBool(D->hasCancel());
2403   Code = serialization::STMT_OMP_MASTER_TASKLOOP_DIRECTIVE;
2404 }
2405 
2406 void ASTStmtWriter::VisitOMPMasterTaskLoopSimdDirective(
2407     OMPMasterTaskLoopSimdDirective *D) {
2408   VisitOMPLoopDirective(D);
2409   Code = serialization::STMT_OMP_MASTER_TASKLOOP_SIMD_DIRECTIVE;
2410 }
2411 
2412 void ASTStmtWriter::VisitOMPParallelMasterTaskLoopDirective(
2413     OMPParallelMasterTaskLoopDirective *D) {
2414   VisitOMPLoopDirective(D);
2415   Record.writeBool(D->hasCancel());
2416   Code = serialization::STMT_OMP_PARALLEL_MASTER_TASKLOOP_DIRECTIVE;
2417 }
2418 
2419 void ASTStmtWriter::VisitOMPParallelMasterTaskLoopSimdDirective(
2420     OMPParallelMasterTaskLoopSimdDirective *D) {
2421   VisitOMPLoopDirective(D);
2422   Code = serialization::STMT_OMP_PARALLEL_MASTER_TASKLOOP_SIMD_DIRECTIVE;
2423 }
2424 
2425 void ASTStmtWriter::VisitOMPDistributeDirective(OMPDistributeDirective *D) {
2426   VisitOMPLoopDirective(D);
2427   Code = serialization::STMT_OMP_DISTRIBUTE_DIRECTIVE;
2428 }
2429 
2430 void ASTStmtWriter::VisitOMPTargetUpdateDirective(OMPTargetUpdateDirective *D) {
2431   VisitStmt(D);
2432   VisitOMPExecutableDirective(D);
2433   Code = serialization::STMT_OMP_TARGET_UPDATE_DIRECTIVE;
2434 }
2435 
2436 void ASTStmtWriter::VisitOMPDistributeParallelForDirective(
2437     OMPDistributeParallelForDirective *D) {
2438   VisitOMPLoopDirective(D);
2439   Record.writeBool(D->hasCancel());
2440   Code = serialization::STMT_OMP_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE;
2441 }
2442 
2443 void ASTStmtWriter::VisitOMPDistributeParallelForSimdDirective(
2444     OMPDistributeParallelForSimdDirective *D) {
2445   VisitOMPLoopDirective(D);
2446   Code = serialization::STMT_OMP_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE;
2447 }
2448 
2449 void ASTStmtWriter::VisitOMPDistributeSimdDirective(
2450     OMPDistributeSimdDirective *D) {
2451   VisitOMPLoopDirective(D);
2452   Code = serialization::STMT_OMP_DISTRIBUTE_SIMD_DIRECTIVE;
2453 }
2454 
2455 void ASTStmtWriter::VisitOMPTargetParallelForSimdDirective(
2456     OMPTargetParallelForSimdDirective *D) {
2457   VisitOMPLoopDirective(D);
2458   Code = serialization::STMT_OMP_TARGET_PARALLEL_FOR_SIMD_DIRECTIVE;
2459 }
2460 
2461 void ASTStmtWriter::VisitOMPTargetSimdDirective(OMPTargetSimdDirective *D) {
2462   VisitOMPLoopDirective(D);
2463   Code = serialization::STMT_OMP_TARGET_SIMD_DIRECTIVE;
2464 }
2465 
2466 void ASTStmtWriter::VisitOMPTeamsDistributeDirective(
2467     OMPTeamsDistributeDirective *D) {
2468   VisitOMPLoopDirective(D);
2469   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_DIRECTIVE;
2470 }
2471 
2472 void ASTStmtWriter::VisitOMPTeamsDistributeSimdDirective(
2473     OMPTeamsDistributeSimdDirective *D) {
2474   VisitOMPLoopDirective(D);
2475   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_SIMD_DIRECTIVE;
2476 }
2477 
2478 void ASTStmtWriter::VisitOMPTeamsDistributeParallelForSimdDirective(
2479     OMPTeamsDistributeParallelForSimdDirective *D) {
2480   VisitOMPLoopDirective(D);
2481   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE;
2482 }
2483 
2484 void ASTStmtWriter::VisitOMPTeamsDistributeParallelForDirective(
2485     OMPTeamsDistributeParallelForDirective *D) {
2486   VisitOMPLoopDirective(D);
2487   Record.writeBool(D->hasCancel());
2488   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE;
2489 }
2490 
2491 void ASTStmtWriter::VisitOMPTargetTeamsDirective(OMPTargetTeamsDirective *D) {
2492   VisitStmt(D);
2493   VisitOMPExecutableDirective(D);
2494   Code = serialization::STMT_OMP_TARGET_TEAMS_DIRECTIVE;
2495 }
2496 
2497 void ASTStmtWriter::VisitOMPTargetTeamsDistributeDirective(
2498     OMPTargetTeamsDistributeDirective *D) {
2499   VisitOMPLoopDirective(D);
2500   Code = serialization::STMT_OMP_TARGET_TEAMS_DISTRIBUTE_DIRECTIVE;
2501 }
2502 
2503 void ASTStmtWriter::VisitOMPTargetTeamsDistributeParallelForDirective(
2504     OMPTargetTeamsDistributeParallelForDirective *D) {
2505   VisitOMPLoopDirective(D);
2506   Record.writeBool(D->hasCancel());
2507   Code = serialization::STMT_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE;
2508 }
2509 
2510 void ASTStmtWriter::VisitOMPTargetTeamsDistributeParallelForSimdDirective(
2511     OMPTargetTeamsDistributeParallelForSimdDirective *D) {
2512   VisitOMPLoopDirective(D);
2513   Code = serialization::
2514       STMT_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE;
2515 }
2516 
2517 void ASTStmtWriter::VisitOMPTargetTeamsDistributeSimdDirective(
2518     OMPTargetTeamsDistributeSimdDirective *D) {
2519   VisitOMPLoopDirective(D);
2520   Code = serialization::STMT_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD_DIRECTIVE;
2521 }
2522 
2523 //===----------------------------------------------------------------------===//
2524 // ASTWriter Implementation
2525 //===----------------------------------------------------------------------===//
2526 
2527 unsigned ASTWriter::RecordSwitchCaseID(SwitchCase *S) {
2528   assert(SwitchCaseIDs.find(S) == SwitchCaseIDs.end() &&
2529          "SwitchCase recorded twice");
2530   unsigned NextID = SwitchCaseIDs.size();
2531   SwitchCaseIDs[S] = NextID;
2532   return NextID;
2533 }
2534 
2535 unsigned ASTWriter::getSwitchCaseID(SwitchCase *S) {
2536   assert(SwitchCaseIDs.find(S) != SwitchCaseIDs.end() &&
2537          "SwitchCase hasn't been seen yet");
2538   return SwitchCaseIDs[S];
2539 }
2540 
2541 void ASTWriter::ClearSwitchCaseIDs() {
2542   SwitchCaseIDs.clear();
2543 }
2544 
2545 /// Write the given substatement or subexpression to the
2546 /// bitstream.
2547 void ASTWriter::WriteSubStmt(Stmt *S) {
2548   RecordData Record;
2549   ASTStmtWriter Writer(*this, Record);
2550   ++NumStatements;
2551 
2552   if (!S) {
2553     Stream.EmitRecord(serialization::STMT_NULL_PTR, Record);
2554     return;
2555   }
2556 
2557   llvm::DenseMap<Stmt *, uint64_t>::iterator I = SubStmtEntries.find(S);
2558   if (I != SubStmtEntries.end()) {
2559     Record.push_back(I->second);
2560     Stream.EmitRecord(serialization::STMT_REF_PTR, Record);
2561     return;
2562   }
2563 
2564 #ifndef NDEBUG
2565   assert(!ParentStmts.count(S) && "There is a Stmt cycle!");
2566 
2567   struct ParentStmtInserterRAII {
2568     Stmt *S;
2569     llvm::DenseSet<Stmt *> &ParentStmts;
2570 
2571     ParentStmtInserterRAII(Stmt *S, llvm::DenseSet<Stmt *> &ParentStmts)
2572       : S(S), ParentStmts(ParentStmts) {
2573       ParentStmts.insert(S);
2574     }
2575     ~ParentStmtInserterRAII() {
2576       ParentStmts.erase(S);
2577     }
2578   };
2579 
2580   ParentStmtInserterRAII ParentStmtInserter(S, ParentStmts);
2581 #endif
2582 
2583   Writer.Visit(S);
2584 
2585   uint64_t Offset = Writer.Emit();
2586   SubStmtEntries[S] = Offset;
2587 }
2588 
2589 /// Flush all of the statements that have been added to the
2590 /// queue via AddStmt().
2591 void ASTRecordWriter::FlushStmts() {
2592   // We expect to be the only consumer of the two temporary statement maps,
2593   // assert that they are empty.
2594   assert(Writer->SubStmtEntries.empty() && "unexpected entries in sub-stmt map");
2595   assert(Writer->ParentStmts.empty() && "unexpected entries in parent stmt map");
2596 
2597   for (unsigned I = 0, N = StmtsToEmit.size(); I != N; ++I) {
2598     Writer->WriteSubStmt(StmtsToEmit[I]);
2599 
2600     assert(N == StmtsToEmit.size() && "record modified while being written!");
2601 
2602     // Note that we are at the end of a full expression. Any
2603     // expression records that follow this one are part of a different
2604     // expression.
2605     Writer->Stream.EmitRecord(serialization::STMT_STOP, ArrayRef<uint32_t>());
2606 
2607     Writer->SubStmtEntries.clear();
2608     Writer->ParentStmts.clear();
2609   }
2610 
2611   StmtsToEmit.clear();
2612 }
2613 
2614 void ASTRecordWriter::FlushSubStmts() {
2615   // For a nested statement, write out the substatements in reverse order (so
2616   // that a simple stack machine can be used when loading), and don't emit a
2617   // STMT_STOP after each one.
2618   for (unsigned I = 0, N = StmtsToEmit.size(); I != N; ++I) {
2619     Writer->WriteSubStmt(StmtsToEmit[N - I - 1]);
2620     assert(N == StmtsToEmit.size() && "record modified while being written!");
2621   }
2622 
2623   StmtsToEmit.clear();
2624 }
2625