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