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   Record.push_back(static_cast<unsigned>(E->getADLCallKind()));
655   Code = serialization::EXPR_CALL;
656 }
657 
658 void ASTStmtWriter::VisitMemberExpr(MemberExpr *E) {
659   // Don't call VisitExpr, we'll write everything here.
660 
661   Record.push_back(E->hasQualifier());
662   if (E->hasQualifier())
663     Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
664 
665   Record.push_back(E->hasTemplateKWAndArgsInfo());
666   if (E->hasTemplateKWAndArgsInfo()) {
667     Record.AddSourceLocation(E->getTemplateKeywordLoc());
668     unsigned NumTemplateArgs = E->getNumTemplateArgs();
669     Record.push_back(NumTemplateArgs);
670     Record.AddSourceLocation(E->getLAngleLoc());
671     Record.AddSourceLocation(E->getRAngleLoc());
672     for (unsigned i=0; i != NumTemplateArgs; ++i)
673       Record.AddTemplateArgumentLoc(E->getTemplateArgs()[i]);
674   }
675 
676   Record.push_back(E->hadMultipleCandidates());
677 
678   DeclAccessPair FoundDecl = E->getFoundDecl();
679   Record.AddDeclRef(FoundDecl.getDecl());
680   Record.push_back(FoundDecl.getAccess());
681 
682   Record.AddTypeRef(E->getType());
683   Record.push_back(E->getValueKind());
684   Record.push_back(E->getObjectKind());
685   Record.AddStmt(E->getBase());
686   Record.AddDeclRef(E->getMemberDecl());
687   Record.AddSourceLocation(E->getMemberLoc());
688   Record.push_back(E->isArrow());
689   Record.AddSourceLocation(E->getOperatorLoc());
690   Record.AddDeclarationNameLoc(E->MemberDNLoc,
691                                E->getMemberDecl()->getDeclName());
692   Code = serialization::EXPR_MEMBER;
693 }
694 
695 void ASTStmtWriter::VisitObjCIsaExpr(ObjCIsaExpr *E) {
696   VisitExpr(E);
697   Record.AddStmt(E->getBase());
698   Record.AddSourceLocation(E->getIsaMemberLoc());
699   Record.AddSourceLocation(E->getOpLoc());
700   Record.push_back(E->isArrow());
701   Code = serialization::EXPR_OBJC_ISA;
702 }
703 
704 void ASTStmtWriter::
705 VisitObjCIndirectCopyRestoreExpr(ObjCIndirectCopyRestoreExpr *E) {
706   VisitExpr(E);
707   Record.AddStmt(E->getSubExpr());
708   Record.push_back(E->shouldCopy());
709   Code = serialization::EXPR_OBJC_INDIRECT_COPY_RESTORE;
710 }
711 
712 void ASTStmtWriter::VisitObjCBridgedCastExpr(ObjCBridgedCastExpr *E) {
713   VisitExplicitCastExpr(E);
714   Record.AddSourceLocation(E->getLParenLoc());
715   Record.AddSourceLocation(E->getBridgeKeywordLoc());
716   Record.push_back(E->getBridgeKind()); // FIXME: Stable encoding
717   Code = serialization::EXPR_OBJC_BRIDGED_CAST;
718 }
719 
720 void ASTStmtWriter::VisitCastExpr(CastExpr *E) {
721   VisitExpr(E);
722   Record.push_back(E->path_size());
723   Record.AddStmt(E->getSubExpr());
724   Record.push_back(E->getCastKind()); // FIXME: stable encoding
725 
726   for (CastExpr::path_iterator
727          PI = E->path_begin(), PE = E->path_end(); PI != PE; ++PI)
728     Record.AddCXXBaseSpecifier(**PI);
729 }
730 
731 void ASTStmtWriter::VisitBinaryOperator(BinaryOperator *E) {
732   VisitExpr(E);
733   Record.AddStmt(E->getLHS());
734   Record.AddStmt(E->getRHS());
735   Record.push_back(E->getOpcode()); // FIXME: stable encoding
736   Record.AddSourceLocation(E->getOperatorLoc());
737   Record.push_back(E->getFPFeatures().getInt());
738   Code = serialization::EXPR_BINARY_OPERATOR;
739 }
740 
741 void ASTStmtWriter::VisitCompoundAssignOperator(CompoundAssignOperator *E) {
742   VisitBinaryOperator(E);
743   Record.AddTypeRef(E->getComputationLHSType());
744   Record.AddTypeRef(E->getComputationResultType());
745   Code = serialization::EXPR_COMPOUND_ASSIGN_OPERATOR;
746 }
747 
748 void ASTStmtWriter::VisitConditionalOperator(ConditionalOperator *E) {
749   VisitExpr(E);
750   Record.AddStmt(E->getCond());
751   Record.AddStmt(E->getLHS());
752   Record.AddStmt(E->getRHS());
753   Record.AddSourceLocation(E->getQuestionLoc());
754   Record.AddSourceLocation(E->getColonLoc());
755   Code = serialization::EXPR_CONDITIONAL_OPERATOR;
756 }
757 
758 void
759 ASTStmtWriter::VisitBinaryConditionalOperator(BinaryConditionalOperator *E) {
760   VisitExpr(E);
761   Record.AddStmt(E->getOpaqueValue());
762   Record.AddStmt(E->getCommon());
763   Record.AddStmt(E->getCond());
764   Record.AddStmt(E->getTrueExpr());
765   Record.AddStmt(E->getFalseExpr());
766   Record.AddSourceLocation(E->getQuestionLoc());
767   Record.AddSourceLocation(E->getColonLoc());
768   Code = serialization::EXPR_BINARY_CONDITIONAL_OPERATOR;
769 }
770 
771 void ASTStmtWriter::VisitImplicitCastExpr(ImplicitCastExpr *E) {
772   VisitCastExpr(E);
773   Record.push_back(E->isPartOfExplicitCast());
774 
775   if (E->path_size() == 0)
776     AbbrevToUse = Writer.getExprImplicitCastAbbrev();
777 
778   Code = serialization::EXPR_IMPLICIT_CAST;
779 }
780 
781 void ASTStmtWriter::VisitExplicitCastExpr(ExplicitCastExpr *E) {
782   VisitCastExpr(E);
783   Record.AddTypeSourceInfo(E->getTypeInfoAsWritten());
784 }
785 
786 void ASTStmtWriter::VisitCStyleCastExpr(CStyleCastExpr *E) {
787   VisitExplicitCastExpr(E);
788   Record.AddSourceLocation(E->getLParenLoc());
789   Record.AddSourceLocation(E->getRParenLoc());
790   Code = serialization::EXPR_CSTYLE_CAST;
791 }
792 
793 void ASTStmtWriter::VisitCompoundLiteralExpr(CompoundLiteralExpr *E) {
794   VisitExpr(E);
795   Record.AddSourceLocation(E->getLParenLoc());
796   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
797   Record.AddStmt(E->getInitializer());
798   Record.push_back(E->isFileScope());
799   Code = serialization::EXPR_COMPOUND_LITERAL;
800 }
801 
802 void ASTStmtWriter::VisitExtVectorElementExpr(ExtVectorElementExpr *E) {
803   VisitExpr(E);
804   Record.AddStmt(E->getBase());
805   Record.AddIdentifierRef(&E->getAccessor());
806   Record.AddSourceLocation(E->getAccessorLoc());
807   Code = serialization::EXPR_EXT_VECTOR_ELEMENT;
808 }
809 
810 void ASTStmtWriter::VisitInitListExpr(InitListExpr *E) {
811   VisitExpr(E);
812   // NOTE: only add the (possibly null) syntactic form.
813   // No need to serialize the isSemanticForm flag and the semantic form.
814   Record.AddStmt(E->getSyntacticForm());
815   Record.AddSourceLocation(E->getLBraceLoc());
816   Record.AddSourceLocation(E->getRBraceLoc());
817   bool isArrayFiller = E->ArrayFillerOrUnionFieldInit.is<Expr*>();
818   Record.push_back(isArrayFiller);
819   if (isArrayFiller)
820     Record.AddStmt(E->getArrayFiller());
821   else
822     Record.AddDeclRef(E->getInitializedFieldInUnion());
823   Record.push_back(E->hadArrayRangeDesignator());
824   Record.push_back(E->getNumInits());
825   if (isArrayFiller) {
826     // ArrayFiller may have filled "holes" due to designated initializer.
827     // Replace them by 0 to indicate that the filler goes in that place.
828     Expr *filler = E->getArrayFiller();
829     for (unsigned I = 0, N = E->getNumInits(); I != N; ++I)
830       Record.AddStmt(E->getInit(I) != filler ? E->getInit(I) : nullptr);
831   } else {
832     for (unsigned I = 0, N = E->getNumInits(); I != N; ++I)
833       Record.AddStmt(E->getInit(I));
834   }
835   Code = serialization::EXPR_INIT_LIST;
836 }
837 
838 void ASTStmtWriter::VisitDesignatedInitExpr(DesignatedInitExpr *E) {
839   VisitExpr(E);
840   Record.push_back(E->getNumSubExprs());
841   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
842     Record.AddStmt(E->getSubExpr(I));
843   Record.AddSourceLocation(E->getEqualOrColonLoc());
844   Record.push_back(E->usesGNUSyntax());
845   for (const DesignatedInitExpr::Designator &D : E->designators()) {
846     if (D.isFieldDesignator()) {
847       if (FieldDecl *Field = D.getField()) {
848         Record.push_back(serialization::DESIG_FIELD_DECL);
849         Record.AddDeclRef(Field);
850       } else {
851         Record.push_back(serialization::DESIG_FIELD_NAME);
852         Record.AddIdentifierRef(D.getFieldName());
853       }
854       Record.AddSourceLocation(D.getDotLoc());
855       Record.AddSourceLocation(D.getFieldLoc());
856     } else if (D.isArrayDesignator()) {
857       Record.push_back(serialization::DESIG_ARRAY);
858       Record.push_back(D.getFirstExprIndex());
859       Record.AddSourceLocation(D.getLBracketLoc());
860       Record.AddSourceLocation(D.getRBracketLoc());
861     } else {
862       assert(D.isArrayRangeDesignator() && "Unknown designator");
863       Record.push_back(serialization::DESIG_ARRAY_RANGE);
864       Record.push_back(D.getFirstExprIndex());
865       Record.AddSourceLocation(D.getLBracketLoc());
866       Record.AddSourceLocation(D.getEllipsisLoc());
867       Record.AddSourceLocation(D.getRBracketLoc());
868     }
869   }
870   Code = serialization::EXPR_DESIGNATED_INIT;
871 }
872 
873 void ASTStmtWriter::VisitDesignatedInitUpdateExpr(DesignatedInitUpdateExpr *E) {
874   VisitExpr(E);
875   Record.AddStmt(E->getBase());
876   Record.AddStmt(E->getUpdater());
877   Code = serialization::EXPR_DESIGNATED_INIT_UPDATE;
878 }
879 
880 void ASTStmtWriter::VisitNoInitExpr(NoInitExpr *E) {
881   VisitExpr(E);
882   Code = serialization::EXPR_NO_INIT;
883 }
884 
885 void ASTStmtWriter::VisitArrayInitLoopExpr(ArrayInitLoopExpr *E) {
886   VisitExpr(E);
887   Record.AddStmt(E->SubExprs[0]);
888   Record.AddStmt(E->SubExprs[1]);
889   Code = serialization::EXPR_ARRAY_INIT_LOOP;
890 }
891 
892 void ASTStmtWriter::VisitArrayInitIndexExpr(ArrayInitIndexExpr *E) {
893   VisitExpr(E);
894   Code = serialization::EXPR_ARRAY_INIT_INDEX;
895 }
896 
897 void ASTStmtWriter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) {
898   VisitExpr(E);
899   Code = serialization::EXPR_IMPLICIT_VALUE_INIT;
900 }
901 
902 void ASTStmtWriter::VisitVAArgExpr(VAArgExpr *E) {
903   VisitExpr(E);
904   Record.AddStmt(E->getSubExpr());
905   Record.AddTypeSourceInfo(E->getWrittenTypeInfo());
906   Record.AddSourceLocation(E->getBuiltinLoc());
907   Record.AddSourceLocation(E->getRParenLoc());
908   Record.push_back(E->isMicrosoftABI());
909   Code = serialization::EXPR_VA_ARG;
910 }
911 
912 void ASTStmtWriter::VisitAddrLabelExpr(AddrLabelExpr *E) {
913   VisitExpr(E);
914   Record.AddSourceLocation(E->getAmpAmpLoc());
915   Record.AddSourceLocation(E->getLabelLoc());
916   Record.AddDeclRef(E->getLabel());
917   Code = serialization::EXPR_ADDR_LABEL;
918 }
919 
920 void ASTStmtWriter::VisitStmtExpr(StmtExpr *E) {
921   VisitExpr(E);
922   Record.AddStmt(E->getSubStmt());
923   Record.AddSourceLocation(E->getLParenLoc());
924   Record.AddSourceLocation(E->getRParenLoc());
925   Code = serialization::EXPR_STMT;
926 }
927 
928 void ASTStmtWriter::VisitChooseExpr(ChooseExpr *E) {
929   VisitExpr(E);
930   Record.AddStmt(E->getCond());
931   Record.AddStmt(E->getLHS());
932   Record.AddStmt(E->getRHS());
933   Record.AddSourceLocation(E->getBuiltinLoc());
934   Record.AddSourceLocation(E->getRParenLoc());
935   Record.push_back(E->isConditionDependent() ? false : E->isConditionTrue());
936   Code = serialization::EXPR_CHOOSE;
937 }
938 
939 void ASTStmtWriter::VisitGNUNullExpr(GNUNullExpr *E) {
940   VisitExpr(E);
941   Record.AddSourceLocation(E->getTokenLocation());
942   Code = serialization::EXPR_GNU_NULL;
943 }
944 
945 void ASTStmtWriter::VisitShuffleVectorExpr(ShuffleVectorExpr *E) {
946   VisitExpr(E);
947   Record.push_back(E->getNumSubExprs());
948   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
949     Record.AddStmt(E->getExpr(I));
950   Record.AddSourceLocation(E->getBuiltinLoc());
951   Record.AddSourceLocation(E->getRParenLoc());
952   Code = serialization::EXPR_SHUFFLE_VECTOR;
953 }
954 
955 void ASTStmtWriter::VisitConvertVectorExpr(ConvertVectorExpr *E) {
956   VisitExpr(E);
957   Record.AddSourceLocation(E->getBuiltinLoc());
958   Record.AddSourceLocation(E->getRParenLoc());
959   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
960   Record.AddStmt(E->getSrcExpr());
961   Code = serialization::EXPR_CONVERT_VECTOR;
962 }
963 
964 void ASTStmtWriter::VisitBlockExpr(BlockExpr *E) {
965   VisitExpr(E);
966   Record.AddDeclRef(E->getBlockDecl());
967   Code = serialization::EXPR_BLOCK;
968 }
969 
970 void ASTStmtWriter::VisitGenericSelectionExpr(GenericSelectionExpr *E) {
971   VisitExpr(E);
972   Record.push_back(E->getNumAssocs());
973 
974   Record.AddStmt(E->getControllingExpr());
975   for (unsigned I = 0, N = E->getNumAssocs(); I != N; ++I) {
976     Record.AddTypeSourceInfo(E->getAssocTypeSourceInfo(I));
977     Record.AddStmt(E->getAssocExpr(I));
978   }
979   Record.push_back(E->isResultDependent() ? -1U : E->getResultIndex());
980 
981   Record.AddSourceLocation(E->getGenericLoc());
982   Record.AddSourceLocation(E->getDefaultLoc());
983   Record.AddSourceLocation(E->getRParenLoc());
984   Code = serialization::EXPR_GENERIC_SELECTION;
985 }
986 
987 void ASTStmtWriter::VisitPseudoObjectExpr(PseudoObjectExpr *E) {
988   VisitExpr(E);
989   Record.push_back(E->getNumSemanticExprs());
990 
991   // Push the result index.  Currently, this needs to exactly match
992   // the encoding used internally for ResultIndex.
993   unsigned result = E->getResultExprIndex();
994   result = (result == PseudoObjectExpr::NoResult ? 0 : result + 1);
995   Record.push_back(result);
996 
997   Record.AddStmt(E->getSyntacticForm());
998   for (PseudoObjectExpr::semantics_iterator
999          i = E->semantics_begin(), e = E->semantics_end(); i != e; ++i) {
1000     Record.AddStmt(*i);
1001   }
1002   Code = serialization::EXPR_PSEUDO_OBJECT;
1003 }
1004 
1005 void ASTStmtWriter::VisitAtomicExpr(AtomicExpr *E) {
1006   VisitExpr(E);
1007   Record.push_back(E->getOp());
1008   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
1009     Record.AddStmt(E->getSubExprs()[I]);
1010   Record.AddSourceLocation(E->getBuiltinLoc());
1011   Record.AddSourceLocation(E->getRParenLoc());
1012   Code = serialization::EXPR_ATOMIC;
1013 }
1014 
1015 //===----------------------------------------------------------------------===//
1016 // Objective-C Expressions and Statements.
1017 //===----------------------------------------------------------------------===//
1018 
1019 void ASTStmtWriter::VisitObjCStringLiteral(ObjCStringLiteral *E) {
1020   VisitExpr(E);
1021   Record.AddStmt(E->getString());
1022   Record.AddSourceLocation(E->getAtLoc());
1023   Code = serialization::EXPR_OBJC_STRING_LITERAL;
1024 }
1025 
1026 void ASTStmtWriter::VisitObjCBoxedExpr(ObjCBoxedExpr *E) {
1027   VisitExpr(E);
1028   Record.AddStmt(E->getSubExpr());
1029   Record.AddDeclRef(E->getBoxingMethod());
1030   Record.AddSourceRange(E->getSourceRange());
1031   Code = serialization::EXPR_OBJC_BOXED_EXPRESSION;
1032 }
1033 
1034 void ASTStmtWriter::VisitObjCArrayLiteral(ObjCArrayLiteral *E) {
1035   VisitExpr(E);
1036   Record.push_back(E->getNumElements());
1037   for (unsigned i = 0; i < E->getNumElements(); i++)
1038     Record.AddStmt(E->getElement(i));
1039   Record.AddDeclRef(E->getArrayWithObjectsMethod());
1040   Record.AddSourceRange(E->getSourceRange());
1041   Code = serialization::EXPR_OBJC_ARRAY_LITERAL;
1042 }
1043 
1044 void ASTStmtWriter::VisitObjCDictionaryLiteral(ObjCDictionaryLiteral *E) {
1045   VisitExpr(E);
1046   Record.push_back(E->getNumElements());
1047   Record.push_back(E->HasPackExpansions);
1048   for (unsigned i = 0; i < E->getNumElements(); i++) {
1049     ObjCDictionaryElement Element = E->getKeyValueElement(i);
1050     Record.AddStmt(Element.Key);
1051     Record.AddStmt(Element.Value);
1052     if (E->HasPackExpansions) {
1053       Record.AddSourceLocation(Element.EllipsisLoc);
1054       unsigned NumExpansions = 0;
1055       if (Element.NumExpansions)
1056         NumExpansions = *Element.NumExpansions + 1;
1057       Record.push_back(NumExpansions);
1058     }
1059   }
1060 
1061   Record.AddDeclRef(E->getDictWithObjectsMethod());
1062   Record.AddSourceRange(E->getSourceRange());
1063   Code = serialization::EXPR_OBJC_DICTIONARY_LITERAL;
1064 }
1065 
1066 void ASTStmtWriter::VisitObjCEncodeExpr(ObjCEncodeExpr *E) {
1067   VisitExpr(E);
1068   Record.AddTypeSourceInfo(E->getEncodedTypeSourceInfo());
1069   Record.AddSourceLocation(E->getAtLoc());
1070   Record.AddSourceLocation(E->getRParenLoc());
1071   Code = serialization::EXPR_OBJC_ENCODE;
1072 }
1073 
1074 void ASTStmtWriter::VisitObjCSelectorExpr(ObjCSelectorExpr *E) {
1075   VisitExpr(E);
1076   Record.AddSelectorRef(E->getSelector());
1077   Record.AddSourceLocation(E->getAtLoc());
1078   Record.AddSourceLocation(E->getRParenLoc());
1079   Code = serialization::EXPR_OBJC_SELECTOR_EXPR;
1080 }
1081 
1082 void ASTStmtWriter::VisitObjCProtocolExpr(ObjCProtocolExpr *E) {
1083   VisitExpr(E);
1084   Record.AddDeclRef(E->getProtocol());
1085   Record.AddSourceLocation(E->getAtLoc());
1086   Record.AddSourceLocation(E->ProtoLoc);
1087   Record.AddSourceLocation(E->getRParenLoc());
1088   Code = serialization::EXPR_OBJC_PROTOCOL_EXPR;
1089 }
1090 
1091 void ASTStmtWriter::VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) {
1092   VisitExpr(E);
1093   Record.AddDeclRef(E->getDecl());
1094   Record.AddSourceLocation(E->getLocation());
1095   Record.AddSourceLocation(E->getOpLoc());
1096   Record.AddStmt(E->getBase());
1097   Record.push_back(E->isArrow());
1098   Record.push_back(E->isFreeIvar());
1099   Code = serialization::EXPR_OBJC_IVAR_REF_EXPR;
1100 }
1101 
1102 void ASTStmtWriter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) {
1103   VisitExpr(E);
1104   Record.push_back(E->SetterAndMethodRefFlags.getInt());
1105   Record.push_back(E->isImplicitProperty());
1106   if (E->isImplicitProperty()) {
1107     Record.AddDeclRef(E->getImplicitPropertyGetter());
1108     Record.AddDeclRef(E->getImplicitPropertySetter());
1109   } else {
1110     Record.AddDeclRef(E->getExplicitProperty());
1111   }
1112   Record.AddSourceLocation(E->getLocation());
1113   Record.AddSourceLocation(E->getReceiverLocation());
1114   if (E->isObjectReceiver()) {
1115     Record.push_back(0);
1116     Record.AddStmt(E->getBase());
1117   } else if (E->isSuperReceiver()) {
1118     Record.push_back(1);
1119     Record.AddTypeRef(E->getSuperReceiverType());
1120   } else {
1121     Record.push_back(2);
1122     Record.AddDeclRef(E->getClassReceiver());
1123   }
1124 
1125   Code = serialization::EXPR_OBJC_PROPERTY_REF_EXPR;
1126 }
1127 
1128 void ASTStmtWriter::VisitObjCSubscriptRefExpr(ObjCSubscriptRefExpr *E) {
1129   VisitExpr(E);
1130   Record.AddSourceLocation(E->getRBracket());
1131   Record.AddStmt(E->getBaseExpr());
1132   Record.AddStmt(E->getKeyExpr());
1133   Record.AddDeclRef(E->getAtIndexMethodDecl());
1134   Record.AddDeclRef(E->setAtIndexMethodDecl());
1135 
1136   Code = serialization::EXPR_OBJC_SUBSCRIPT_REF_EXPR;
1137 }
1138 
1139 void ASTStmtWriter::VisitObjCMessageExpr(ObjCMessageExpr *E) {
1140   VisitExpr(E);
1141   Record.push_back(E->getNumArgs());
1142   Record.push_back(E->getNumStoredSelLocs());
1143   Record.push_back(E->SelLocsKind);
1144   Record.push_back(E->isDelegateInitCall());
1145   Record.push_back(E->IsImplicit);
1146   Record.push_back((unsigned)E->getReceiverKind()); // FIXME: stable encoding
1147   switch (E->getReceiverKind()) {
1148   case ObjCMessageExpr::Instance:
1149     Record.AddStmt(E->getInstanceReceiver());
1150     break;
1151 
1152   case ObjCMessageExpr::Class:
1153     Record.AddTypeSourceInfo(E->getClassReceiverTypeInfo());
1154     break;
1155 
1156   case ObjCMessageExpr::SuperClass:
1157   case ObjCMessageExpr::SuperInstance:
1158     Record.AddTypeRef(E->getSuperType());
1159     Record.AddSourceLocation(E->getSuperLoc());
1160     break;
1161   }
1162 
1163   if (E->getMethodDecl()) {
1164     Record.push_back(1);
1165     Record.AddDeclRef(E->getMethodDecl());
1166   } else {
1167     Record.push_back(0);
1168     Record.AddSelectorRef(E->getSelector());
1169   }
1170 
1171   Record.AddSourceLocation(E->getLeftLoc());
1172   Record.AddSourceLocation(E->getRightLoc());
1173 
1174   for (CallExpr::arg_iterator Arg = E->arg_begin(), ArgEnd = E->arg_end();
1175        Arg != ArgEnd; ++Arg)
1176     Record.AddStmt(*Arg);
1177 
1178   SourceLocation *Locs = E->getStoredSelLocs();
1179   for (unsigned i = 0, e = E->getNumStoredSelLocs(); i != e; ++i)
1180     Record.AddSourceLocation(Locs[i]);
1181 
1182   Code = serialization::EXPR_OBJC_MESSAGE_EXPR;
1183 }
1184 
1185 void ASTStmtWriter::VisitObjCForCollectionStmt(ObjCForCollectionStmt *S) {
1186   VisitStmt(S);
1187   Record.AddStmt(S->getElement());
1188   Record.AddStmt(S->getCollection());
1189   Record.AddStmt(S->getBody());
1190   Record.AddSourceLocation(S->getForLoc());
1191   Record.AddSourceLocation(S->getRParenLoc());
1192   Code = serialization::STMT_OBJC_FOR_COLLECTION;
1193 }
1194 
1195 void ASTStmtWriter::VisitObjCAtCatchStmt(ObjCAtCatchStmt *S) {
1196   Record.AddStmt(S->getCatchBody());
1197   Record.AddDeclRef(S->getCatchParamDecl());
1198   Record.AddSourceLocation(S->getAtCatchLoc());
1199   Record.AddSourceLocation(S->getRParenLoc());
1200   Code = serialization::STMT_OBJC_CATCH;
1201 }
1202 
1203 void ASTStmtWriter::VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *S) {
1204   Record.AddStmt(S->getFinallyBody());
1205   Record.AddSourceLocation(S->getAtFinallyLoc());
1206   Code = serialization::STMT_OBJC_FINALLY;
1207 }
1208 
1209 void ASTStmtWriter::VisitObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S) {
1210   Record.AddStmt(S->getSubStmt());
1211   Record.AddSourceLocation(S->getAtLoc());
1212   Code = serialization::STMT_OBJC_AUTORELEASE_POOL;
1213 }
1214 
1215 void ASTStmtWriter::VisitObjCAtTryStmt(ObjCAtTryStmt *S) {
1216   Record.push_back(S->getNumCatchStmts());
1217   Record.push_back(S->getFinallyStmt() != nullptr);
1218   Record.AddStmt(S->getTryBody());
1219   for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; ++I)
1220     Record.AddStmt(S->getCatchStmt(I));
1221   if (S->getFinallyStmt())
1222     Record.AddStmt(S->getFinallyStmt());
1223   Record.AddSourceLocation(S->getAtTryLoc());
1224   Code = serialization::STMT_OBJC_AT_TRY;
1225 }
1226 
1227 void ASTStmtWriter::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
1228   Record.AddStmt(S->getSynchExpr());
1229   Record.AddStmt(S->getSynchBody());
1230   Record.AddSourceLocation(S->getAtSynchronizedLoc());
1231   Code = serialization::STMT_OBJC_AT_SYNCHRONIZED;
1232 }
1233 
1234 void ASTStmtWriter::VisitObjCAtThrowStmt(ObjCAtThrowStmt *S) {
1235   Record.AddStmt(S->getThrowExpr());
1236   Record.AddSourceLocation(S->getThrowLoc());
1237   Code = serialization::STMT_OBJC_AT_THROW;
1238 }
1239 
1240 void ASTStmtWriter::VisitObjCBoolLiteralExpr(ObjCBoolLiteralExpr *E) {
1241   VisitExpr(E);
1242   Record.push_back(E->getValue());
1243   Record.AddSourceLocation(E->getLocation());
1244   Code = serialization::EXPR_OBJC_BOOL_LITERAL;
1245 }
1246 
1247 void ASTStmtWriter::VisitObjCAvailabilityCheckExpr(ObjCAvailabilityCheckExpr *E) {
1248   VisitExpr(E);
1249   Record.AddSourceRange(E->getSourceRange());
1250   Record.AddVersionTuple(E->getVersion());
1251   Code = serialization::EXPR_OBJC_AVAILABILITY_CHECK;
1252 }
1253 
1254 //===----------------------------------------------------------------------===//
1255 // C++ Expressions and Statements.
1256 //===----------------------------------------------------------------------===//
1257 
1258 void ASTStmtWriter::VisitCXXCatchStmt(CXXCatchStmt *S) {
1259   VisitStmt(S);
1260   Record.AddSourceLocation(S->getCatchLoc());
1261   Record.AddDeclRef(S->getExceptionDecl());
1262   Record.AddStmt(S->getHandlerBlock());
1263   Code = serialization::STMT_CXX_CATCH;
1264 }
1265 
1266 void ASTStmtWriter::VisitCXXTryStmt(CXXTryStmt *S) {
1267   VisitStmt(S);
1268   Record.push_back(S->getNumHandlers());
1269   Record.AddSourceLocation(S->getTryLoc());
1270   Record.AddStmt(S->getTryBlock());
1271   for (unsigned i = 0, e = S->getNumHandlers(); i != e; ++i)
1272     Record.AddStmt(S->getHandler(i));
1273   Code = serialization::STMT_CXX_TRY;
1274 }
1275 
1276 void ASTStmtWriter::VisitCXXForRangeStmt(CXXForRangeStmt *S) {
1277   VisitStmt(S);
1278   Record.AddSourceLocation(S->getForLoc());
1279   Record.AddSourceLocation(S->getCoawaitLoc());
1280   Record.AddSourceLocation(S->getColonLoc());
1281   Record.AddSourceLocation(S->getRParenLoc());
1282   Record.AddStmt(S->getInit());
1283   Record.AddStmt(S->getRangeStmt());
1284   Record.AddStmt(S->getBeginStmt());
1285   Record.AddStmt(S->getEndStmt());
1286   Record.AddStmt(S->getCond());
1287   Record.AddStmt(S->getInc());
1288   Record.AddStmt(S->getLoopVarStmt());
1289   Record.AddStmt(S->getBody());
1290   Code = serialization::STMT_CXX_FOR_RANGE;
1291 }
1292 
1293 void ASTStmtWriter::VisitMSDependentExistsStmt(MSDependentExistsStmt *S) {
1294   VisitStmt(S);
1295   Record.AddSourceLocation(S->getKeywordLoc());
1296   Record.push_back(S->isIfExists());
1297   Record.AddNestedNameSpecifierLoc(S->getQualifierLoc());
1298   Record.AddDeclarationNameInfo(S->getNameInfo());
1299   Record.AddStmt(S->getSubStmt());
1300   Code = serialization::STMT_MS_DEPENDENT_EXISTS;
1301 }
1302 
1303 void ASTStmtWriter::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *E) {
1304   VisitCallExpr(E);
1305   Record.push_back(E->getOperator());
1306   Record.AddSourceRange(E->Range);
1307   Record.push_back(E->getFPFeatures().getInt());
1308   Code = serialization::EXPR_CXX_OPERATOR_CALL;
1309 }
1310 
1311 void ASTStmtWriter::VisitCXXMemberCallExpr(CXXMemberCallExpr *E) {
1312   VisitCallExpr(E);
1313   Code = serialization::EXPR_CXX_MEMBER_CALL;
1314 }
1315 
1316 void ASTStmtWriter::VisitCXXConstructExpr(CXXConstructExpr *E) {
1317   VisitExpr(E);
1318   Record.push_back(E->getNumArgs());
1319   for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
1320     Record.AddStmt(E->getArg(I));
1321   Record.AddDeclRef(E->getConstructor());
1322   Record.AddSourceLocation(E->getLocation());
1323   Record.push_back(E->isElidable());
1324   Record.push_back(E->hadMultipleCandidates());
1325   Record.push_back(E->isListInitialization());
1326   Record.push_back(E->isStdInitListInitialization());
1327   Record.push_back(E->requiresZeroInitialization());
1328   Record.push_back(E->getConstructionKind()); // FIXME: stable encoding
1329   Record.AddSourceRange(E->getParenOrBraceRange());
1330   Code = serialization::EXPR_CXX_CONSTRUCT;
1331 }
1332 
1333 void ASTStmtWriter::VisitCXXInheritedCtorInitExpr(CXXInheritedCtorInitExpr *E) {
1334   VisitExpr(E);
1335   Record.AddDeclRef(E->getConstructor());
1336   Record.AddSourceLocation(E->getLocation());
1337   Record.push_back(E->constructsVBase());
1338   Record.push_back(E->inheritedFromVBase());
1339   Code = serialization::EXPR_CXX_INHERITED_CTOR_INIT;
1340 }
1341 
1342 void ASTStmtWriter::VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *E) {
1343   VisitCXXConstructExpr(E);
1344   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1345   Code = serialization::EXPR_CXX_TEMPORARY_OBJECT;
1346 }
1347 
1348 void ASTStmtWriter::VisitLambdaExpr(LambdaExpr *E) {
1349   VisitExpr(E);
1350   Record.push_back(E->NumCaptures);
1351   Record.AddSourceRange(E->IntroducerRange);
1352   Record.push_back(E->CaptureDefault); // FIXME: stable encoding
1353   Record.AddSourceLocation(E->CaptureDefaultLoc);
1354   Record.push_back(E->ExplicitParams);
1355   Record.push_back(E->ExplicitResultType);
1356   Record.AddSourceLocation(E->ClosingBrace);
1357 
1358   // Add capture initializers.
1359   for (LambdaExpr::capture_init_iterator C = E->capture_init_begin(),
1360                                       CEnd = E->capture_init_end();
1361        C != CEnd; ++C) {
1362     Record.AddStmt(*C);
1363   }
1364 
1365   Code = serialization::EXPR_LAMBDA;
1366 }
1367 
1368 void ASTStmtWriter::VisitCXXStdInitializerListExpr(CXXStdInitializerListExpr *E) {
1369   VisitExpr(E);
1370   Record.AddStmt(E->getSubExpr());
1371   Code = serialization::EXPR_CXX_STD_INITIALIZER_LIST;
1372 }
1373 
1374 void ASTStmtWriter::VisitCXXNamedCastExpr(CXXNamedCastExpr *E) {
1375   VisitExplicitCastExpr(E);
1376   Record.AddSourceRange(SourceRange(E->getOperatorLoc(), E->getRParenLoc()));
1377   Record.AddSourceRange(E->getAngleBrackets());
1378 }
1379 
1380 void ASTStmtWriter::VisitCXXStaticCastExpr(CXXStaticCastExpr *E) {
1381   VisitCXXNamedCastExpr(E);
1382   Code = serialization::EXPR_CXX_STATIC_CAST;
1383 }
1384 
1385 void ASTStmtWriter::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *E) {
1386   VisitCXXNamedCastExpr(E);
1387   Code = serialization::EXPR_CXX_DYNAMIC_CAST;
1388 }
1389 
1390 void ASTStmtWriter::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *E) {
1391   VisitCXXNamedCastExpr(E);
1392   Code = serialization::EXPR_CXX_REINTERPRET_CAST;
1393 }
1394 
1395 void ASTStmtWriter::VisitCXXConstCastExpr(CXXConstCastExpr *E) {
1396   VisitCXXNamedCastExpr(E);
1397   Code = serialization::EXPR_CXX_CONST_CAST;
1398 }
1399 
1400 void ASTStmtWriter::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *E) {
1401   VisitExplicitCastExpr(E);
1402   Record.AddSourceLocation(E->getLParenLoc());
1403   Record.AddSourceLocation(E->getRParenLoc());
1404   Code = serialization::EXPR_CXX_FUNCTIONAL_CAST;
1405 }
1406 
1407 void ASTStmtWriter::VisitUserDefinedLiteral(UserDefinedLiteral *E) {
1408   VisitCallExpr(E);
1409   Record.AddSourceLocation(E->UDSuffixLoc);
1410   Code = serialization::EXPR_USER_DEFINED_LITERAL;
1411 }
1412 
1413 void ASTStmtWriter::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *E) {
1414   VisitExpr(E);
1415   Record.push_back(E->getValue());
1416   Record.AddSourceLocation(E->getLocation());
1417   Code = serialization::EXPR_CXX_BOOL_LITERAL;
1418 }
1419 
1420 void ASTStmtWriter::VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *E) {
1421   VisitExpr(E);
1422   Record.AddSourceLocation(E->getLocation());
1423   Code = serialization::EXPR_CXX_NULL_PTR_LITERAL;
1424 }
1425 
1426 void ASTStmtWriter::VisitCXXTypeidExpr(CXXTypeidExpr *E) {
1427   VisitExpr(E);
1428   Record.AddSourceRange(E->getSourceRange());
1429   if (E->isTypeOperand()) {
1430     Record.AddTypeSourceInfo(E->getTypeOperandSourceInfo());
1431     Code = serialization::EXPR_CXX_TYPEID_TYPE;
1432   } else {
1433     Record.AddStmt(E->getExprOperand());
1434     Code = serialization::EXPR_CXX_TYPEID_EXPR;
1435   }
1436 }
1437 
1438 void ASTStmtWriter::VisitCXXThisExpr(CXXThisExpr *E) {
1439   VisitExpr(E);
1440   Record.AddSourceLocation(E->getLocation());
1441   Record.push_back(E->isImplicit());
1442   Code = serialization::EXPR_CXX_THIS;
1443 }
1444 
1445 void ASTStmtWriter::VisitCXXThrowExpr(CXXThrowExpr *E) {
1446   VisitExpr(E);
1447   Record.AddSourceLocation(E->getThrowLoc());
1448   Record.AddStmt(E->getSubExpr());
1449   Record.push_back(E->isThrownVariableInScope());
1450   Code = serialization::EXPR_CXX_THROW;
1451 }
1452 
1453 void ASTStmtWriter::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *E) {
1454   VisitExpr(E);
1455   Record.AddDeclRef(E->getParam());
1456   Record.AddSourceLocation(E->getUsedLocation());
1457   Code = serialization::EXPR_CXX_DEFAULT_ARG;
1458 }
1459 
1460 void ASTStmtWriter::VisitCXXDefaultInitExpr(CXXDefaultInitExpr *E) {
1461   VisitExpr(E);
1462   Record.AddDeclRef(E->getField());
1463   Record.AddSourceLocation(E->getExprLoc());
1464   Code = serialization::EXPR_CXX_DEFAULT_INIT;
1465 }
1466 
1467 void ASTStmtWriter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) {
1468   VisitExpr(E);
1469   Record.AddCXXTemporary(E->getTemporary());
1470   Record.AddStmt(E->getSubExpr());
1471   Code = serialization::EXPR_CXX_BIND_TEMPORARY;
1472 }
1473 
1474 void ASTStmtWriter::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) {
1475   VisitExpr(E);
1476   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1477   Record.AddSourceLocation(E->getRParenLoc());
1478   Code = serialization::EXPR_CXX_SCALAR_VALUE_INIT;
1479 }
1480 
1481 void ASTStmtWriter::VisitCXXNewExpr(CXXNewExpr *E) {
1482   VisitExpr(E);
1483   Record.push_back(E->isGlobalNew());
1484   Record.push_back(E->isArray());
1485   Record.push_back(E->passAlignment());
1486   Record.push_back(E->doesUsualArrayDeleteWantSize());
1487   Record.push_back(E->getNumPlacementArgs());
1488   Record.push_back(E->StoredInitializationStyle);
1489   Record.AddDeclRef(E->getOperatorNew());
1490   Record.AddDeclRef(E->getOperatorDelete());
1491   Record.AddTypeSourceInfo(E->getAllocatedTypeSourceInfo());
1492   Record.AddSourceRange(E->getTypeIdParens());
1493   Record.AddSourceRange(E->getSourceRange());
1494   Record.AddSourceRange(E->getDirectInitRange());
1495   for (CXXNewExpr::arg_iterator I = E->raw_arg_begin(), e = E->raw_arg_end();
1496        I != e; ++I)
1497     Record.AddStmt(*I);
1498 
1499   Code = serialization::EXPR_CXX_NEW;
1500 }
1501 
1502 void ASTStmtWriter::VisitCXXDeleteExpr(CXXDeleteExpr *E) {
1503   VisitExpr(E);
1504   Record.push_back(E->isGlobalDelete());
1505   Record.push_back(E->isArrayForm());
1506   Record.push_back(E->isArrayFormAsWritten());
1507   Record.push_back(E->doesUsualArrayDeleteWantSize());
1508   Record.AddDeclRef(E->getOperatorDelete());
1509   Record.AddStmt(E->getArgument());
1510   Record.AddSourceLocation(E->getBeginLoc());
1511 
1512   Code = serialization::EXPR_CXX_DELETE;
1513 }
1514 
1515 void ASTStmtWriter::VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E) {
1516   VisitExpr(E);
1517 
1518   Record.AddStmt(E->getBase());
1519   Record.push_back(E->isArrow());
1520   Record.AddSourceLocation(E->getOperatorLoc());
1521   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1522   Record.AddTypeSourceInfo(E->getScopeTypeInfo());
1523   Record.AddSourceLocation(E->getColonColonLoc());
1524   Record.AddSourceLocation(E->getTildeLoc());
1525 
1526   // PseudoDestructorTypeStorage.
1527   Record.AddIdentifierRef(E->getDestroyedTypeIdentifier());
1528   if (E->getDestroyedTypeIdentifier())
1529     Record.AddSourceLocation(E->getDestroyedTypeLoc());
1530   else
1531     Record.AddTypeSourceInfo(E->getDestroyedTypeInfo());
1532 
1533   Code = serialization::EXPR_CXX_PSEUDO_DESTRUCTOR;
1534 }
1535 
1536 void ASTStmtWriter::VisitExprWithCleanups(ExprWithCleanups *E) {
1537   VisitExpr(E);
1538   Record.push_back(E->getNumObjects());
1539   for (unsigned i = 0, e = E->getNumObjects(); i != e; ++i)
1540     Record.AddDeclRef(E->getObject(i));
1541 
1542   Record.push_back(E->cleanupsHaveSideEffects());
1543   Record.AddStmt(E->getSubExpr());
1544   Code = serialization::EXPR_EXPR_WITH_CLEANUPS;
1545 }
1546 
1547 void
1548 ASTStmtWriter::VisitCXXDependentScopeMemberExpr(CXXDependentScopeMemberExpr *E){
1549   VisitExpr(E);
1550 
1551   // Don't emit anything here, HasTemplateKWAndArgsInfo must be
1552   // emitted first.
1553 
1554   Record.push_back(E->HasTemplateKWAndArgsInfo);
1555   if (E->HasTemplateKWAndArgsInfo) {
1556     const ASTTemplateKWAndArgsInfo &ArgInfo =
1557         *E->getTrailingObjects<ASTTemplateKWAndArgsInfo>();
1558     Record.push_back(ArgInfo.NumTemplateArgs);
1559     AddTemplateKWAndArgsInfo(ArgInfo,
1560                              E->getTrailingObjects<TemplateArgumentLoc>());
1561   }
1562 
1563   if (!E->isImplicitAccess())
1564     Record.AddStmt(E->getBase());
1565   else
1566     Record.AddStmt(nullptr);
1567   Record.AddTypeRef(E->getBaseType());
1568   Record.push_back(E->isArrow());
1569   Record.AddSourceLocation(E->getOperatorLoc());
1570   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1571   Record.AddDeclRef(E->getFirstQualifierFoundInScope());
1572   Record.AddDeclarationNameInfo(E->MemberNameInfo);
1573   Code = serialization::EXPR_CXX_DEPENDENT_SCOPE_MEMBER;
1574 }
1575 
1576 void
1577 ASTStmtWriter::VisitDependentScopeDeclRefExpr(DependentScopeDeclRefExpr *E) {
1578   VisitExpr(E);
1579 
1580   // Don't emit anything here, HasTemplateKWAndArgsInfo must be
1581   // emitted first.
1582 
1583   Record.push_back(E->HasTemplateKWAndArgsInfo);
1584   if (E->HasTemplateKWAndArgsInfo) {
1585     const ASTTemplateKWAndArgsInfo &ArgInfo =
1586         *E->getTrailingObjects<ASTTemplateKWAndArgsInfo>();
1587     Record.push_back(ArgInfo.NumTemplateArgs);
1588     AddTemplateKWAndArgsInfo(ArgInfo,
1589                              E->getTrailingObjects<TemplateArgumentLoc>());
1590   }
1591 
1592   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1593   Record.AddDeclarationNameInfo(E->NameInfo);
1594   Code = serialization::EXPR_CXX_DEPENDENT_SCOPE_DECL_REF;
1595 }
1596 
1597 void
1598 ASTStmtWriter::VisitCXXUnresolvedConstructExpr(CXXUnresolvedConstructExpr *E) {
1599   VisitExpr(E);
1600   Record.push_back(E->arg_size());
1601   for (CXXUnresolvedConstructExpr::arg_iterator
1602          ArgI = E->arg_begin(), ArgE = E->arg_end(); ArgI != ArgE; ++ArgI)
1603     Record.AddStmt(*ArgI);
1604   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1605   Record.AddSourceLocation(E->getLParenLoc());
1606   Record.AddSourceLocation(E->getRParenLoc());
1607   Code = serialization::EXPR_CXX_UNRESOLVED_CONSTRUCT;
1608 }
1609 
1610 void ASTStmtWriter::VisitOverloadExpr(OverloadExpr *E) {
1611   VisitExpr(E);
1612 
1613   // Don't emit anything here, HasTemplateKWAndArgsInfo must be
1614   // emitted first.
1615 
1616   Record.push_back(E->HasTemplateKWAndArgsInfo);
1617   if (E->HasTemplateKWAndArgsInfo) {
1618     const ASTTemplateKWAndArgsInfo &ArgInfo =
1619         *E->getTrailingASTTemplateKWAndArgsInfo();
1620     Record.push_back(ArgInfo.NumTemplateArgs);
1621     AddTemplateKWAndArgsInfo(ArgInfo, E->getTrailingTemplateArgumentLoc());
1622   }
1623 
1624   Record.push_back(E->getNumDecls());
1625   for (OverloadExpr::decls_iterator
1626          OvI = E->decls_begin(), OvE = E->decls_end(); OvI != OvE; ++OvI) {
1627     Record.AddDeclRef(OvI.getDecl());
1628     Record.push_back(OvI.getAccess());
1629   }
1630 
1631   Record.AddDeclarationNameInfo(E->NameInfo);
1632   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1633 }
1634 
1635 void ASTStmtWriter::VisitUnresolvedMemberExpr(UnresolvedMemberExpr *E) {
1636   VisitOverloadExpr(E);
1637   Record.push_back(E->isArrow());
1638   Record.push_back(E->hasUnresolvedUsing());
1639   Record.AddStmt(!E->isImplicitAccess() ? E->getBase() : nullptr);
1640   Record.AddTypeRef(E->getBaseType());
1641   Record.AddSourceLocation(E->getOperatorLoc());
1642   Code = serialization::EXPR_CXX_UNRESOLVED_MEMBER;
1643 }
1644 
1645 void ASTStmtWriter::VisitUnresolvedLookupExpr(UnresolvedLookupExpr *E) {
1646   VisitOverloadExpr(E);
1647   Record.push_back(E->requiresADL());
1648   Record.push_back(E->isOverloaded());
1649   Record.AddDeclRef(E->getNamingClass());
1650   Code = serialization::EXPR_CXX_UNRESOLVED_LOOKUP;
1651 }
1652 
1653 void ASTStmtWriter::VisitTypeTraitExpr(TypeTraitExpr *E) {
1654   VisitExpr(E);
1655   Record.push_back(E->TypeTraitExprBits.NumArgs);
1656   Record.push_back(E->TypeTraitExprBits.Kind); // FIXME: Stable encoding
1657   Record.push_back(E->TypeTraitExprBits.Value);
1658   Record.AddSourceRange(E->getSourceRange());
1659   for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
1660     Record.AddTypeSourceInfo(E->getArg(I));
1661   Code = serialization::EXPR_TYPE_TRAIT;
1662 }
1663 
1664 void ASTStmtWriter::VisitArrayTypeTraitExpr(ArrayTypeTraitExpr *E) {
1665   VisitExpr(E);
1666   Record.push_back(E->getTrait());
1667   Record.push_back(E->getValue());
1668   Record.AddSourceRange(E->getSourceRange());
1669   Record.AddTypeSourceInfo(E->getQueriedTypeSourceInfo());
1670   Record.AddStmt(E->getDimensionExpression());
1671   Code = serialization::EXPR_ARRAY_TYPE_TRAIT;
1672 }
1673 
1674 void ASTStmtWriter::VisitExpressionTraitExpr(ExpressionTraitExpr *E) {
1675   VisitExpr(E);
1676   Record.push_back(E->getTrait());
1677   Record.push_back(E->getValue());
1678   Record.AddSourceRange(E->getSourceRange());
1679   Record.AddStmt(E->getQueriedExpression());
1680   Code = serialization::EXPR_CXX_EXPRESSION_TRAIT;
1681 }
1682 
1683 void ASTStmtWriter::VisitCXXNoexceptExpr(CXXNoexceptExpr *E) {
1684   VisitExpr(E);
1685   Record.push_back(E->getValue());
1686   Record.AddSourceRange(E->getSourceRange());
1687   Record.AddStmt(E->getOperand());
1688   Code = serialization::EXPR_CXX_NOEXCEPT;
1689 }
1690 
1691 void ASTStmtWriter::VisitPackExpansionExpr(PackExpansionExpr *E) {
1692   VisitExpr(E);
1693   Record.AddSourceLocation(E->getEllipsisLoc());
1694   Record.push_back(E->NumExpansions);
1695   Record.AddStmt(E->getPattern());
1696   Code = serialization::EXPR_PACK_EXPANSION;
1697 }
1698 
1699 void ASTStmtWriter::VisitSizeOfPackExpr(SizeOfPackExpr *E) {
1700   VisitExpr(E);
1701   Record.push_back(E->isPartiallySubstituted() ? E->getPartialArguments().size()
1702                                                : 0);
1703   Record.AddSourceLocation(E->OperatorLoc);
1704   Record.AddSourceLocation(E->PackLoc);
1705   Record.AddSourceLocation(E->RParenLoc);
1706   Record.AddDeclRef(E->Pack);
1707   if (E->isPartiallySubstituted()) {
1708     for (const auto &TA : E->getPartialArguments())
1709       Record.AddTemplateArgument(TA);
1710   } else if (!E->isValueDependent()) {
1711     Record.push_back(E->getPackLength());
1712   }
1713   Code = serialization::EXPR_SIZEOF_PACK;
1714 }
1715 
1716 void ASTStmtWriter::VisitSubstNonTypeTemplateParmExpr(
1717                                               SubstNonTypeTemplateParmExpr *E) {
1718   VisitExpr(E);
1719   Record.AddDeclRef(E->getParameter());
1720   Record.AddSourceLocation(E->getNameLoc());
1721   Record.AddStmt(E->getReplacement());
1722   Code = serialization::EXPR_SUBST_NON_TYPE_TEMPLATE_PARM;
1723 }
1724 
1725 void ASTStmtWriter::VisitSubstNonTypeTemplateParmPackExpr(
1726                                           SubstNonTypeTemplateParmPackExpr *E) {
1727   VisitExpr(E);
1728   Record.AddDeclRef(E->getParameterPack());
1729   Record.AddTemplateArgument(E->getArgumentPack());
1730   Record.AddSourceLocation(E->getParameterPackLocation());
1731   Code = serialization::EXPR_SUBST_NON_TYPE_TEMPLATE_PARM_PACK;
1732 }
1733 
1734 void ASTStmtWriter::VisitFunctionParmPackExpr(FunctionParmPackExpr *E) {
1735   VisitExpr(E);
1736   Record.push_back(E->getNumExpansions());
1737   Record.AddDeclRef(E->getParameterPack());
1738   Record.AddSourceLocation(E->getParameterPackLocation());
1739   for (FunctionParmPackExpr::iterator I = E->begin(), End = E->end();
1740        I != End; ++I)
1741     Record.AddDeclRef(*I);
1742   Code = serialization::EXPR_FUNCTION_PARM_PACK;
1743 }
1744 
1745 void ASTStmtWriter::VisitMaterializeTemporaryExpr(MaterializeTemporaryExpr *E) {
1746   VisitExpr(E);
1747   Record.AddStmt(E->getTemporary());
1748   Record.AddDeclRef(E->getExtendingDecl());
1749   Record.push_back(E->getManglingNumber());
1750   Code = serialization::EXPR_MATERIALIZE_TEMPORARY;
1751 }
1752 
1753 void ASTStmtWriter::VisitCXXFoldExpr(CXXFoldExpr *E) {
1754   VisitExpr(E);
1755   Record.AddSourceLocation(E->LParenLoc);
1756   Record.AddSourceLocation(E->EllipsisLoc);
1757   Record.AddSourceLocation(E->RParenLoc);
1758   Record.AddStmt(E->SubExprs[0]);
1759   Record.AddStmt(E->SubExprs[1]);
1760   Record.push_back(E->Opcode);
1761   Code = serialization::EXPR_CXX_FOLD;
1762 }
1763 
1764 void ASTStmtWriter::VisitOpaqueValueExpr(OpaqueValueExpr *E) {
1765   VisitExpr(E);
1766   Record.AddStmt(E->getSourceExpr());
1767   Record.AddSourceLocation(E->getLocation());
1768   Record.push_back(E->isUnique());
1769   Code = serialization::EXPR_OPAQUE_VALUE;
1770 }
1771 
1772 void ASTStmtWriter::VisitTypoExpr(TypoExpr *E) {
1773   VisitExpr(E);
1774   // TODO: Figure out sane writer behavior for a TypoExpr, if necessary
1775   llvm_unreachable("Cannot write TypoExpr nodes");
1776 }
1777 
1778 //===----------------------------------------------------------------------===//
1779 // CUDA Expressions and Statements.
1780 //===----------------------------------------------------------------------===//
1781 
1782 void ASTStmtWriter::VisitCUDAKernelCallExpr(CUDAKernelCallExpr *E) {
1783   VisitCallExpr(E);
1784   Record.AddStmt(E->getConfig());
1785   Code = serialization::EXPR_CUDA_KERNEL_CALL;
1786 }
1787 
1788 //===----------------------------------------------------------------------===//
1789 // OpenCL Expressions and Statements.
1790 //===----------------------------------------------------------------------===//
1791 void ASTStmtWriter::VisitAsTypeExpr(AsTypeExpr *E) {
1792   VisitExpr(E);
1793   Record.AddSourceLocation(E->getBuiltinLoc());
1794   Record.AddSourceLocation(E->getRParenLoc());
1795   Record.AddStmt(E->getSrcExpr());
1796   Code = serialization::EXPR_ASTYPE;
1797 }
1798 
1799 //===----------------------------------------------------------------------===//
1800 // Microsoft Expressions and Statements.
1801 //===----------------------------------------------------------------------===//
1802 void ASTStmtWriter::VisitMSPropertyRefExpr(MSPropertyRefExpr *E) {
1803   VisitExpr(E);
1804   Record.push_back(E->isArrow());
1805   Record.AddStmt(E->getBaseExpr());
1806   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1807   Record.AddSourceLocation(E->getMemberLoc());
1808   Record.AddDeclRef(E->getPropertyDecl());
1809   Code = serialization::EXPR_CXX_PROPERTY_REF_EXPR;
1810 }
1811 
1812 void ASTStmtWriter::VisitMSPropertySubscriptExpr(MSPropertySubscriptExpr *E) {
1813   VisitExpr(E);
1814   Record.AddStmt(E->getBase());
1815   Record.AddStmt(E->getIdx());
1816   Record.AddSourceLocation(E->getRBracketLoc());
1817   Code = serialization::EXPR_CXX_PROPERTY_SUBSCRIPT_EXPR;
1818 }
1819 
1820 void ASTStmtWriter::VisitCXXUuidofExpr(CXXUuidofExpr *E) {
1821   VisitExpr(E);
1822   Record.AddSourceRange(E->getSourceRange());
1823   Record.AddString(E->getUuidStr());
1824   if (E->isTypeOperand()) {
1825     Record.AddTypeSourceInfo(E->getTypeOperandSourceInfo());
1826     Code = serialization::EXPR_CXX_UUIDOF_TYPE;
1827   } else {
1828     Record.AddStmt(E->getExprOperand());
1829     Code = serialization::EXPR_CXX_UUIDOF_EXPR;
1830   }
1831 }
1832 
1833 void ASTStmtWriter::VisitSEHExceptStmt(SEHExceptStmt *S) {
1834   VisitStmt(S);
1835   Record.AddSourceLocation(S->getExceptLoc());
1836   Record.AddStmt(S->getFilterExpr());
1837   Record.AddStmt(S->getBlock());
1838   Code = serialization::STMT_SEH_EXCEPT;
1839 }
1840 
1841 void ASTStmtWriter::VisitSEHFinallyStmt(SEHFinallyStmt *S) {
1842   VisitStmt(S);
1843   Record.AddSourceLocation(S->getFinallyLoc());
1844   Record.AddStmt(S->getBlock());
1845   Code = serialization::STMT_SEH_FINALLY;
1846 }
1847 
1848 void ASTStmtWriter::VisitSEHTryStmt(SEHTryStmt *S) {
1849   VisitStmt(S);
1850   Record.push_back(S->getIsCXXTry());
1851   Record.AddSourceLocation(S->getTryLoc());
1852   Record.AddStmt(S->getTryBlock());
1853   Record.AddStmt(S->getHandler());
1854   Code = serialization::STMT_SEH_TRY;
1855 }
1856 
1857 void ASTStmtWriter::VisitSEHLeaveStmt(SEHLeaveStmt *S) {
1858   VisitStmt(S);
1859   Record.AddSourceLocation(S->getLeaveLoc());
1860   Code = serialization::STMT_SEH_LEAVE;
1861 }
1862 
1863 //===----------------------------------------------------------------------===//
1864 // OpenMP Directives.
1865 //===----------------------------------------------------------------------===//
1866 void ASTStmtWriter::VisitOMPExecutableDirective(OMPExecutableDirective *E) {
1867   Record.AddSourceLocation(E->getBeginLoc());
1868   Record.AddSourceLocation(E->getEndLoc());
1869   OMPClauseWriter ClauseWriter(Record);
1870   for (unsigned i = 0; i < E->getNumClauses(); ++i) {
1871     ClauseWriter.writeClause(E->getClause(i));
1872   }
1873   if (E->hasAssociatedStmt())
1874     Record.AddStmt(E->getAssociatedStmt());
1875 }
1876 
1877 void ASTStmtWriter::VisitOMPLoopDirective(OMPLoopDirective *D) {
1878   VisitStmt(D);
1879   Record.push_back(D->getNumClauses());
1880   Record.push_back(D->getCollapsedNumber());
1881   VisitOMPExecutableDirective(D);
1882   Record.AddStmt(D->getIterationVariable());
1883   Record.AddStmt(D->getLastIteration());
1884   Record.AddStmt(D->getCalcLastIteration());
1885   Record.AddStmt(D->getPreCond());
1886   Record.AddStmt(D->getCond());
1887   Record.AddStmt(D->getInit());
1888   Record.AddStmt(D->getInc());
1889   Record.AddStmt(D->getPreInits());
1890   if (isOpenMPWorksharingDirective(D->getDirectiveKind()) ||
1891       isOpenMPTaskLoopDirective(D->getDirectiveKind()) ||
1892       isOpenMPDistributeDirective(D->getDirectiveKind())) {
1893     Record.AddStmt(D->getIsLastIterVariable());
1894     Record.AddStmt(D->getLowerBoundVariable());
1895     Record.AddStmt(D->getUpperBoundVariable());
1896     Record.AddStmt(D->getStrideVariable());
1897     Record.AddStmt(D->getEnsureUpperBound());
1898     Record.AddStmt(D->getNextLowerBound());
1899     Record.AddStmt(D->getNextUpperBound());
1900     Record.AddStmt(D->getNumIterations());
1901   }
1902   if (isOpenMPLoopBoundSharingDirective(D->getDirectiveKind())) {
1903     Record.AddStmt(D->getPrevLowerBoundVariable());
1904     Record.AddStmt(D->getPrevUpperBoundVariable());
1905     Record.AddStmt(D->getDistInc());
1906     Record.AddStmt(D->getPrevEnsureUpperBound());
1907     Record.AddStmt(D->getCombinedLowerBoundVariable());
1908     Record.AddStmt(D->getCombinedUpperBoundVariable());
1909     Record.AddStmt(D->getCombinedEnsureUpperBound());
1910     Record.AddStmt(D->getCombinedInit());
1911     Record.AddStmt(D->getCombinedCond());
1912     Record.AddStmt(D->getCombinedNextLowerBound());
1913     Record.AddStmt(D->getCombinedNextUpperBound());
1914     Record.AddStmt(D->getCombinedDistCond());
1915     Record.AddStmt(D->getCombinedParForInDistCond());
1916   }
1917   for (auto I : D->counters()) {
1918     Record.AddStmt(I);
1919   }
1920   for (auto I : D->private_counters()) {
1921     Record.AddStmt(I);
1922   }
1923   for (auto I : D->inits()) {
1924     Record.AddStmt(I);
1925   }
1926   for (auto I : D->updates()) {
1927     Record.AddStmt(I);
1928   }
1929   for (auto I : D->finals()) {
1930     Record.AddStmt(I);
1931   }
1932 }
1933 
1934 void ASTStmtWriter::VisitOMPParallelDirective(OMPParallelDirective *D) {
1935   VisitStmt(D);
1936   Record.push_back(D->getNumClauses());
1937   VisitOMPExecutableDirective(D);
1938   Record.push_back(D->hasCancel() ? 1 : 0);
1939   Code = serialization::STMT_OMP_PARALLEL_DIRECTIVE;
1940 }
1941 
1942 void ASTStmtWriter::VisitOMPSimdDirective(OMPSimdDirective *D) {
1943   VisitOMPLoopDirective(D);
1944   Code = serialization::STMT_OMP_SIMD_DIRECTIVE;
1945 }
1946 
1947 void ASTStmtWriter::VisitOMPForDirective(OMPForDirective *D) {
1948   VisitOMPLoopDirective(D);
1949   Record.push_back(D->hasCancel() ? 1 : 0);
1950   Code = serialization::STMT_OMP_FOR_DIRECTIVE;
1951 }
1952 
1953 void ASTStmtWriter::VisitOMPForSimdDirective(OMPForSimdDirective *D) {
1954   VisitOMPLoopDirective(D);
1955   Code = serialization::STMT_OMP_FOR_SIMD_DIRECTIVE;
1956 }
1957 
1958 void ASTStmtWriter::VisitOMPSectionsDirective(OMPSectionsDirective *D) {
1959   VisitStmt(D);
1960   Record.push_back(D->getNumClauses());
1961   VisitOMPExecutableDirective(D);
1962   Record.push_back(D->hasCancel() ? 1 : 0);
1963   Code = serialization::STMT_OMP_SECTIONS_DIRECTIVE;
1964 }
1965 
1966 void ASTStmtWriter::VisitOMPSectionDirective(OMPSectionDirective *D) {
1967   VisitStmt(D);
1968   VisitOMPExecutableDirective(D);
1969   Record.push_back(D->hasCancel() ? 1 : 0);
1970   Code = serialization::STMT_OMP_SECTION_DIRECTIVE;
1971 }
1972 
1973 void ASTStmtWriter::VisitOMPSingleDirective(OMPSingleDirective *D) {
1974   VisitStmt(D);
1975   Record.push_back(D->getNumClauses());
1976   VisitOMPExecutableDirective(D);
1977   Code = serialization::STMT_OMP_SINGLE_DIRECTIVE;
1978 }
1979 
1980 void ASTStmtWriter::VisitOMPMasterDirective(OMPMasterDirective *D) {
1981   VisitStmt(D);
1982   VisitOMPExecutableDirective(D);
1983   Code = serialization::STMT_OMP_MASTER_DIRECTIVE;
1984 }
1985 
1986 void ASTStmtWriter::VisitOMPCriticalDirective(OMPCriticalDirective *D) {
1987   VisitStmt(D);
1988   Record.push_back(D->getNumClauses());
1989   VisitOMPExecutableDirective(D);
1990   Record.AddDeclarationNameInfo(D->getDirectiveName());
1991   Code = serialization::STMT_OMP_CRITICAL_DIRECTIVE;
1992 }
1993 
1994 void ASTStmtWriter::VisitOMPParallelForDirective(OMPParallelForDirective *D) {
1995   VisitOMPLoopDirective(D);
1996   Record.push_back(D->hasCancel() ? 1 : 0);
1997   Code = serialization::STMT_OMP_PARALLEL_FOR_DIRECTIVE;
1998 }
1999 
2000 void ASTStmtWriter::VisitOMPParallelForSimdDirective(
2001     OMPParallelForSimdDirective *D) {
2002   VisitOMPLoopDirective(D);
2003   Code = serialization::STMT_OMP_PARALLEL_FOR_SIMD_DIRECTIVE;
2004 }
2005 
2006 void ASTStmtWriter::VisitOMPParallelSectionsDirective(
2007     OMPParallelSectionsDirective *D) {
2008   VisitStmt(D);
2009   Record.push_back(D->getNumClauses());
2010   VisitOMPExecutableDirective(D);
2011   Record.push_back(D->hasCancel() ? 1 : 0);
2012   Code = serialization::STMT_OMP_PARALLEL_SECTIONS_DIRECTIVE;
2013 }
2014 
2015 void ASTStmtWriter::VisitOMPTaskDirective(OMPTaskDirective *D) {
2016   VisitStmt(D);
2017   Record.push_back(D->getNumClauses());
2018   VisitOMPExecutableDirective(D);
2019   Record.push_back(D->hasCancel() ? 1 : 0);
2020   Code = serialization::STMT_OMP_TASK_DIRECTIVE;
2021 }
2022 
2023 void ASTStmtWriter::VisitOMPAtomicDirective(OMPAtomicDirective *D) {
2024   VisitStmt(D);
2025   Record.push_back(D->getNumClauses());
2026   VisitOMPExecutableDirective(D);
2027   Record.AddStmt(D->getX());
2028   Record.AddStmt(D->getV());
2029   Record.AddStmt(D->getExpr());
2030   Record.AddStmt(D->getUpdateExpr());
2031   Record.push_back(D->isXLHSInRHSPart() ? 1 : 0);
2032   Record.push_back(D->isPostfixUpdate() ? 1 : 0);
2033   Code = serialization::STMT_OMP_ATOMIC_DIRECTIVE;
2034 }
2035 
2036 void ASTStmtWriter::VisitOMPTargetDirective(OMPTargetDirective *D) {
2037   VisitStmt(D);
2038   Record.push_back(D->getNumClauses());
2039   VisitOMPExecutableDirective(D);
2040   Code = serialization::STMT_OMP_TARGET_DIRECTIVE;
2041 }
2042 
2043 void ASTStmtWriter::VisitOMPTargetDataDirective(OMPTargetDataDirective *D) {
2044   VisitStmt(D);
2045   Record.push_back(D->getNumClauses());
2046   VisitOMPExecutableDirective(D);
2047   Code = serialization::STMT_OMP_TARGET_DATA_DIRECTIVE;
2048 }
2049 
2050 void ASTStmtWriter::VisitOMPTargetEnterDataDirective(
2051     OMPTargetEnterDataDirective *D) {
2052   VisitStmt(D);
2053   Record.push_back(D->getNumClauses());
2054   VisitOMPExecutableDirective(D);
2055   Code = serialization::STMT_OMP_TARGET_ENTER_DATA_DIRECTIVE;
2056 }
2057 
2058 void ASTStmtWriter::VisitOMPTargetExitDataDirective(
2059     OMPTargetExitDataDirective *D) {
2060   VisitStmt(D);
2061   Record.push_back(D->getNumClauses());
2062   VisitOMPExecutableDirective(D);
2063   Code = serialization::STMT_OMP_TARGET_EXIT_DATA_DIRECTIVE;
2064 }
2065 
2066 void ASTStmtWriter::VisitOMPTargetParallelDirective(
2067     OMPTargetParallelDirective *D) {
2068   VisitStmt(D);
2069   Record.push_back(D->getNumClauses());
2070   VisitOMPExecutableDirective(D);
2071   Code = serialization::STMT_OMP_TARGET_PARALLEL_DIRECTIVE;
2072 }
2073 
2074 void ASTStmtWriter::VisitOMPTargetParallelForDirective(
2075     OMPTargetParallelForDirective *D) {
2076   VisitOMPLoopDirective(D);
2077   Record.push_back(D->hasCancel() ? 1 : 0);
2078   Code = serialization::STMT_OMP_TARGET_PARALLEL_FOR_DIRECTIVE;
2079 }
2080 
2081 void ASTStmtWriter::VisitOMPTaskyieldDirective(OMPTaskyieldDirective *D) {
2082   VisitStmt(D);
2083   VisitOMPExecutableDirective(D);
2084   Code = serialization::STMT_OMP_TASKYIELD_DIRECTIVE;
2085 }
2086 
2087 void ASTStmtWriter::VisitOMPBarrierDirective(OMPBarrierDirective *D) {
2088   VisitStmt(D);
2089   VisitOMPExecutableDirective(D);
2090   Code = serialization::STMT_OMP_BARRIER_DIRECTIVE;
2091 }
2092 
2093 void ASTStmtWriter::VisitOMPTaskwaitDirective(OMPTaskwaitDirective *D) {
2094   VisitStmt(D);
2095   VisitOMPExecutableDirective(D);
2096   Code = serialization::STMT_OMP_TASKWAIT_DIRECTIVE;
2097 }
2098 
2099 void ASTStmtWriter::VisitOMPTaskgroupDirective(OMPTaskgroupDirective *D) {
2100   VisitStmt(D);
2101   Record.push_back(D->getNumClauses());
2102   VisitOMPExecutableDirective(D);
2103   Record.AddStmt(D->getReductionRef());
2104   Code = serialization::STMT_OMP_TASKGROUP_DIRECTIVE;
2105 }
2106 
2107 void ASTStmtWriter::VisitOMPFlushDirective(OMPFlushDirective *D) {
2108   VisitStmt(D);
2109   Record.push_back(D->getNumClauses());
2110   VisitOMPExecutableDirective(D);
2111   Code = serialization::STMT_OMP_FLUSH_DIRECTIVE;
2112 }
2113 
2114 void ASTStmtWriter::VisitOMPOrderedDirective(OMPOrderedDirective *D) {
2115   VisitStmt(D);
2116   Record.push_back(D->getNumClauses());
2117   VisitOMPExecutableDirective(D);
2118   Code = serialization::STMT_OMP_ORDERED_DIRECTIVE;
2119 }
2120 
2121 void ASTStmtWriter::VisitOMPTeamsDirective(OMPTeamsDirective *D) {
2122   VisitStmt(D);
2123   Record.push_back(D->getNumClauses());
2124   VisitOMPExecutableDirective(D);
2125   Code = serialization::STMT_OMP_TEAMS_DIRECTIVE;
2126 }
2127 
2128 void ASTStmtWriter::VisitOMPCancellationPointDirective(
2129     OMPCancellationPointDirective *D) {
2130   VisitStmt(D);
2131   VisitOMPExecutableDirective(D);
2132   Record.push_back(D->getCancelRegion());
2133   Code = serialization::STMT_OMP_CANCELLATION_POINT_DIRECTIVE;
2134 }
2135 
2136 void ASTStmtWriter::VisitOMPCancelDirective(OMPCancelDirective *D) {
2137   VisitStmt(D);
2138   Record.push_back(D->getNumClauses());
2139   VisitOMPExecutableDirective(D);
2140   Record.push_back(D->getCancelRegion());
2141   Code = serialization::STMT_OMP_CANCEL_DIRECTIVE;
2142 }
2143 
2144 void ASTStmtWriter::VisitOMPTaskLoopDirective(OMPTaskLoopDirective *D) {
2145   VisitOMPLoopDirective(D);
2146   Code = serialization::STMT_OMP_TASKLOOP_DIRECTIVE;
2147 }
2148 
2149 void ASTStmtWriter::VisitOMPTaskLoopSimdDirective(OMPTaskLoopSimdDirective *D) {
2150   VisitOMPLoopDirective(D);
2151   Code = serialization::STMT_OMP_TASKLOOP_SIMD_DIRECTIVE;
2152 }
2153 
2154 void ASTStmtWriter::VisitOMPDistributeDirective(OMPDistributeDirective *D) {
2155   VisitOMPLoopDirective(D);
2156   Code = serialization::STMT_OMP_DISTRIBUTE_DIRECTIVE;
2157 }
2158 
2159 void ASTStmtWriter::VisitOMPTargetUpdateDirective(OMPTargetUpdateDirective *D) {
2160   VisitStmt(D);
2161   Record.push_back(D->getNumClauses());
2162   VisitOMPExecutableDirective(D);
2163   Code = serialization::STMT_OMP_TARGET_UPDATE_DIRECTIVE;
2164 }
2165 
2166 void ASTStmtWriter::VisitOMPDistributeParallelForDirective(
2167     OMPDistributeParallelForDirective *D) {
2168   VisitOMPLoopDirective(D);
2169   Record.push_back(D->hasCancel() ? 1 : 0);
2170   Code = serialization::STMT_OMP_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE;
2171 }
2172 
2173 void ASTStmtWriter::VisitOMPDistributeParallelForSimdDirective(
2174     OMPDistributeParallelForSimdDirective *D) {
2175   VisitOMPLoopDirective(D);
2176   Code = serialization::STMT_OMP_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE;
2177 }
2178 
2179 void ASTStmtWriter::VisitOMPDistributeSimdDirective(
2180     OMPDistributeSimdDirective *D) {
2181   VisitOMPLoopDirective(D);
2182   Code = serialization::STMT_OMP_DISTRIBUTE_SIMD_DIRECTIVE;
2183 }
2184 
2185 void ASTStmtWriter::VisitOMPTargetParallelForSimdDirective(
2186     OMPTargetParallelForSimdDirective *D) {
2187   VisitOMPLoopDirective(D);
2188   Code = serialization::STMT_OMP_TARGET_PARALLEL_FOR_SIMD_DIRECTIVE;
2189 }
2190 
2191 void ASTStmtWriter::VisitOMPTargetSimdDirective(OMPTargetSimdDirective *D) {
2192   VisitOMPLoopDirective(D);
2193   Code = serialization::STMT_OMP_TARGET_SIMD_DIRECTIVE;
2194 }
2195 
2196 void ASTStmtWriter::VisitOMPTeamsDistributeDirective(
2197     OMPTeamsDistributeDirective *D) {
2198   VisitOMPLoopDirective(D);
2199   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_DIRECTIVE;
2200 }
2201 
2202 void ASTStmtWriter::VisitOMPTeamsDistributeSimdDirective(
2203     OMPTeamsDistributeSimdDirective *D) {
2204   VisitOMPLoopDirective(D);
2205   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_SIMD_DIRECTIVE;
2206 }
2207 
2208 void ASTStmtWriter::VisitOMPTeamsDistributeParallelForSimdDirective(
2209     OMPTeamsDistributeParallelForSimdDirective *D) {
2210   VisitOMPLoopDirective(D);
2211   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE;
2212 }
2213 
2214 void ASTStmtWriter::VisitOMPTeamsDistributeParallelForDirective(
2215     OMPTeamsDistributeParallelForDirective *D) {
2216   VisitOMPLoopDirective(D);
2217   Record.push_back(D->hasCancel() ? 1 : 0);
2218   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE;
2219 }
2220 
2221 void ASTStmtWriter::VisitOMPTargetTeamsDirective(OMPTargetTeamsDirective *D) {
2222   VisitStmt(D);
2223   Record.push_back(D->getNumClauses());
2224   VisitOMPExecutableDirective(D);
2225   Code = serialization::STMT_OMP_TARGET_TEAMS_DIRECTIVE;
2226 }
2227 
2228 void ASTStmtWriter::VisitOMPTargetTeamsDistributeDirective(
2229     OMPTargetTeamsDistributeDirective *D) {
2230   VisitOMPLoopDirective(D);
2231   Code = serialization::STMT_OMP_TARGET_TEAMS_DISTRIBUTE_DIRECTIVE;
2232 }
2233 
2234 void ASTStmtWriter::VisitOMPTargetTeamsDistributeParallelForDirective(
2235     OMPTargetTeamsDistributeParallelForDirective *D) {
2236   VisitOMPLoopDirective(D);
2237   Record.push_back(D->hasCancel() ? 1 : 0);
2238   Code = serialization::STMT_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE;
2239 }
2240 
2241 void ASTStmtWriter::VisitOMPTargetTeamsDistributeParallelForSimdDirective(
2242     OMPTargetTeamsDistributeParallelForSimdDirective *D) {
2243   VisitOMPLoopDirective(D);
2244   Code = serialization::
2245       STMT_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE;
2246 }
2247 
2248 void ASTStmtWriter::VisitOMPTargetTeamsDistributeSimdDirective(
2249     OMPTargetTeamsDistributeSimdDirective *D) {
2250   VisitOMPLoopDirective(D);
2251   Code = serialization::STMT_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD_DIRECTIVE;
2252 }
2253 
2254 //===----------------------------------------------------------------------===//
2255 // ASTWriter Implementation
2256 //===----------------------------------------------------------------------===//
2257 
2258 unsigned ASTWriter::RecordSwitchCaseID(SwitchCase *S) {
2259   assert(SwitchCaseIDs.find(S) == SwitchCaseIDs.end() &&
2260          "SwitchCase recorded twice");
2261   unsigned NextID = SwitchCaseIDs.size();
2262   SwitchCaseIDs[S] = NextID;
2263   return NextID;
2264 }
2265 
2266 unsigned ASTWriter::getSwitchCaseID(SwitchCase *S) {
2267   assert(SwitchCaseIDs.find(S) != SwitchCaseIDs.end() &&
2268          "SwitchCase hasn't been seen yet");
2269   return SwitchCaseIDs[S];
2270 }
2271 
2272 void ASTWriter::ClearSwitchCaseIDs() {
2273   SwitchCaseIDs.clear();
2274 }
2275 
2276 /// Write the given substatement or subexpression to the
2277 /// bitstream.
2278 void ASTWriter::WriteSubStmt(Stmt *S) {
2279   RecordData Record;
2280   ASTStmtWriter Writer(*this, Record);
2281   ++NumStatements;
2282 
2283   if (!S) {
2284     Stream.EmitRecord(serialization::STMT_NULL_PTR, Record);
2285     return;
2286   }
2287 
2288   llvm::DenseMap<Stmt *, uint64_t>::iterator I = SubStmtEntries.find(S);
2289   if (I != SubStmtEntries.end()) {
2290     Record.push_back(I->second);
2291     Stream.EmitRecord(serialization::STMT_REF_PTR, Record);
2292     return;
2293   }
2294 
2295 #ifndef NDEBUG
2296   assert(!ParentStmts.count(S) && "There is a Stmt cycle!");
2297 
2298   struct ParentStmtInserterRAII {
2299     Stmt *S;
2300     llvm::DenseSet<Stmt *> &ParentStmts;
2301 
2302     ParentStmtInserterRAII(Stmt *S, llvm::DenseSet<Stmt *> &ParentStmts)
2303       : S(S), ParentStmts(ParentStmts) {
2304       ParentStmts.insert(S);
2305     }
2306     ~ParentStmtInserterRAII() {
2307       ParentStmts.erase(S);
2308     }
2309   };
2310 
2311   ParentStmtInserterRAII ParentStmtInserter(S, ParentStmts);
2312 #endif
2313 
2314   Writer.Visit(S);
2315 
2316   uint64_t Offset = Writer.Emit();
2317   SubStmtEntries[S] = Offset;
2318 }
2319 
2320 /// Flush all of the statements that have been added to the
2321 /// queue via AddStmt().
2322 void ASTRecordWriter::FlushStmts() {
2323   // We expect to be the only consumer of the two temporary statement maps,
2324   // assert that they are empty.
2325   assert(Writer->SubStmtEntries.empty() && "unexpected entries in sub-stmt map");
2326   assert(Writer->ParentStmts.empty() && "unexpected entries in parent stmt map");
2327 
2328   for (unsigned I = 0, N = StmtsToEmit.size(); I != N; ++I) {
2329     Writer->WriteSubStmt(StmtsToEmit[I]);
2330 
2331     assert(N == StmtsToEmit.size() && "record modified while being written!");
2332 
2333     // Note that we are at the end of a full expression. Any
2334     // expression records that follow this one are part of a different
2335     // expression.
2336     Writer->Stream.EmitRecord(serialization::STMT_STOP, ArrayRef<uint32_t>());
2337 
2338     Writer->SubStmtEntries.clear();
2339     Writer->ParentStmts.clear();
2340   }
2341 
2342   StmtsToEmit.clear();
2343 }
2344 
2345 void ASTRecordWriter::FlushSubStmts() {
2346   // For a nested statement, write out the substatements in reverse order (so
2347   // that a simple stack machine can be used when loading), and don't emit a
2348   // STMT_STOP after each one.
2349   for (unsigned I = 0, N = StmtsToEmit.size(); I != N; ++I) {
2350     Writer->WriteSubStmt(StmtsToEmit[N - I - 1]);
2351     assert(N == StmtsToEmit.size() && "record modified while being written!");
2352   }
2353 
2354   StmtsToEmit.clear();
2355 }
2356