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