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 //  This file implements serialization for Statements and Expressions.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "clang/Serialization/ASTWriter.h"
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/DeclCXX.h"
17 #include "clang/AST/DeclObjC.h"
18 #include "clang/AST/DeclTemplate.h"
19 #include "clang/AST/StmtVisitor.h"
20 #include "llvm/Bitcode/BitstreamWriter.h"
21 using namespace clang;
22 
23 //===----------------------------------------------------------------------===//
24 // Statement/expression serialization
25 //===----------------------------------------------------------------------===//
26 
27 namespace clang {
28   class ASTStmtWriter : public StmtVisitor<ASTStmtWriter, void> {
29     ASTWriter &Writer;
30     ASTWriter::RecordData &Record;
31 
32   public:
33     serialization::StmtCode Code;
34     unsigned AbbrevToUse;
35 
36     ASTStmtWriter(ASTWriter &Writer, ASTWriter::RecordData &Record)
37       : Writer(Writer), Record(Record) { }
38 
39     void AddTemplateKWAndArgsInfo(const ASTTemplateKWAndArgsInfo &Args);
40 
41     void VisitStmt(Stmt *S);
42 #define STMT(Type, Base) \
43     void Visit##Type(Type *);
44 #include "clang/AST/StmtNodes.inc"
45   };
46 }
47 
48 void ASTStmtWriter::
49 AddTemplateKWAndArgsInfo(const ASTTemplateKWAndArgsInfo &Args) {
50   Writer.AddSourceLocation(Args.getTemplateKeywordLoc(), Record);
51   Writer.AddSourceLocation(Args.LAngleLoc, Record);
52   Writer.AddSourceLocation(Args.RAngleLoc, Record);
53   for (unsigned i=0; i != Args.NumTemplateArgs; ++i)
54     Writer.AddTemplateArgumentLoc(Args.getTemplateArgs()[i], Record);
55 }
56 
57 void ASTStmtWriter::VisitStmt(Stmt *S) {
58 }
59 
60 void ASTStmtWriter::VisitNullStmt(NullStmt *S) {
61   VisitStmt(S);
62   Writer.AddSourceLocation(S->getSemiLoc(), Record);
63   Record.push_back(S->HasLeadingEmptyMacro);
64   Code = serialization::STMT_NULL;
65 }
66 
67 void ASTStmtWriter::VisitCompoundStmt(CompoundStmt *S) {
68   VisitStmt(S);
69   Record.push_back(S->size());
70   for (CompoundStmt::body_iterator CS = S->body_begin(), CSEnd = S->body_end();
71        CS != CSEnd; ++CS)
72     Writer.AddStmt(*CS);
73   Writer.AddSourceLocation(S->getLBracLoc(), Record);
74   Writer.AddSourceLocation(S->getRBracLoc(), Record);
75   Code = serialization::STMT_COMPOUND;
76 }
77 
78 void ASTStmtWriter::VisitSwitchCase(SwitchCase *S) {
79   VisitStmt(S);
80   Record.push_back(Writer.getSwitchCaseID(S));
81 }
82 
83 void ASTStmtWriter::VisitCaseStmt(CaseStmt *S) {
84   VisitSwitchCase(S);
85   Writer.AddStmt(S->getLHS());
86   Writer.AddStmt(S->getRHS());
87   Writer.AddStmt(S->getSubStmt());
88   Writer.AddSourceLocation(S->getCaseLoc(), Record);
89   Writer.AddSourceLocation(S->getEllipsisLoc(), Record);
90   Writer.AddSourceLocation(S->getColonLoc(), Record);
91   Code = serialization::STMT_CASE;
92 }
93 
94 void ASTStmtWriter::VisitDefaultStmt(DefaultStmt *S) {
95   VisitSwitchCase(S);
96   Writer.AddStmt(S->getSubStmt());
97   Writer.AddSourceLocation(S->getDefaultLoc(), Record);
98   Writer.AddSourceLocation(S->getColonLoc(), Record);
99   Code = serialization::STMT_DEFAULT;
100 }
101 
102 void ASTStmtWriter::VisitLabelStmt(LabelStmt *S) {
103   VisitStmt(S);
104   Writer.AddDeclRef(S->getDecl(), Record);
105   Writer.AddStmt(S->getSubStmt());
106   Writer.AddSourceLocation(S->getIdentLoc(), Record);
107   Code = serialization::STMT_LABEL;
108 }
109 
110 void ASTStmtWriter::VisitAttributedStmt(AttributedStmt *S) {
111   VisitStmt(S);
112   Record.push_back(S->getAttrs().size());
113   Writer.WriteAttributes(S->getAttrs(), Record);
114   Writer.AddStmt(S->getSubStmt());
115   Writer.AddSourceLocation(S->getAttrLoc(), Record);
116   Code = serialization::STMT_ATTRIBUTED;
117 }
118 
119 void ASTStmtWriter::VisitIfStmt(IfStmt *S) {
120   VisitStmt(S);
121   Writer.AddDeclRef(S->getConditionVariable(), Record);
122   Writer.AddStmt(S->getCond());
123   Writer.AddStmt(S->getThen());
124   Writer.AddStmt(S->getElse());
125   Writer.AddSourceLocation(S->getIfLoc(), Record);
126   Writer.AddSourceLocation(S->getElseLoc(), Record);
127   Code = serialization::STMT_IF;
128 }
129 
130 void ASTStmtWriter::VisitSwitchStmt(SwitchStmt *S) {
131   VisitStmt(S);
132   Writer.AddDeclRef(S->getConditionVariable(), Record);
133   Writer.AddStmt(S->getCond());
134   Writer.AddStmt(S->getBody());
135   Writer.AddSourceLocation(S->getSwitchLoc(), Record);
136   Record.push_back(S->isAllEnumCasesCovered());
137   for (SwitchCase *SC = S->getSwitchCaseList(); SC;
138        SC = SC->getNextSwitchCase())
139     Record.push_back(Writer.RecordSwitchCaseID(SC));
140   Code = serialization::STMT_SWITCH;
141 }
142 
143 void ASTStmtWriter::VisitWhileStmt(WhileStmt *S) {
144   VisitStmt(S);
145   Writer.AddDeclRef(S->getConditionVariable(), Record);
146   Writer.AddStmt(S->getCond());
147   Writer.AddStmt(S->getBody());
148   Writer.AddSourceLocation(S->getWhileLoc(), Record);
149   Code = serialization::STMT_WHILE;
150 }
151 
152 void ASTStmtWriter::VisitDoStmt(DoStmt *S) {
153   VisitStmt(S);
154   Writer.AddStmt(S->getCond());
155   Writer.AddStmt(S->getBody());
156   Writer.AddSourceLocation(S->getDoLoc(), Record);
157   Writer.AddSourceLocation(S->getWhileLoc(), Record);
158   Writer.AddSourceLocation(S->getRParenLoc(), Record);
159   Code = serialization::STMT_DO;
160 }
161 
162 void ASTStmtWriter::VisitForStmt(ForStmt *S) {
163   VisitStmt(S);
164   Writer.AddStmt(S->getInit());
165   Writer.AddStmt(S->getCond());
166   Writer.AddDeclRef(S->getConditionVariable(), Record);
167   Writer.AddStmt(S->getInc());
168   Writer.AddStmt(S->getBody());
169   Writer.AddSourceLocation(S->getForLoc(), Record);
170   Writer.AddSourceLocation(S->getLParenLoc(), Record);
171   Writer.AddSourceLocation(S->getRParenLoc(), Record);
172   Code = serialization::STMT_FOR;
173 }
174 
175 void ASTStmtWriter::VisitGotoStmt(GotoStmt *S) {
176   VisitStmt(S);
177   Writer.AddDeclRef(S->getLabel(), Record);
178   Writer.AddSourceLocation(S->getGotoLoc(), Record);
179   Writer.AddSourceLocation(S->getLabelLoc(), Record);
180   Code = serialization::STMT_GOTO;
181 }
182 
183 void ASTStmtWriter::VisitIndirectGotoStmt(IndirectGotoStmt *S) {
184   VisitStmt(S);
185   Writer.AddSourceLocation(S->getGotoLoc(), Record);
186   Writer.AddSourceLocation(S->getStarLoc(), Record);
187   Writer.AddStmt(S->getTarget());
188   Code = serialization::STMT_INDIRECT_GOTO;
189 }
190 
191 void ASTStmtWriter::VisitContinueStmt(ContinueStmt *S) {
192   VisitStmt(S);
193   Writer.AddSourceLocation(S->getContinueLoc(), Record);
194   Code = serialization::STMT_CONTINUE;
195 }
196 
197 void ASTStmtWriter::VisitBreakStmt(BreakStmt *S) {
198   VisitStmt(S);
199   Writer.AddSourceLocation(S->getBreakLoc(), Record);
200   Code = serialization::STMT_BREAK;
201 }
202 
203 void ASTStmtWriter::VisitReturnStmt(ReturnStmt *S) {
204   VisitStmt(S);
205   Writer.AddStmt(S->getRetValue());
206   Writer.AddSourceLocation(S->getReturnLoc(), Record);
207   Writer.AddDeclRef(S->getNRVOCandidate(), Record);
208   Code = serialization::STMT_RETURN;
209 }
210 
211 void ASTStmtWriter::VisitDeclStmt(DeclStmt *S) {
212   VisitStmt(S);
213   Writer.AddSourceLocation(S->getStartLoc(), Record);
214   Writer.AddSourceLocation(S->getEndLoc(), Record);
215   DeclGroupRef DG = S->getDeclGroup();
216   for (DeclGroupRef::iterator D = DG.begin(), DEnd = DG.end(); D != DEnd; ++D)
217     Writer.AddDeclRef(*D, Record);
218   Code = serialization::STMT_DECL;
219 }
220 
221 void ASTStmtWriter::VisitGCCAsmStmt(GCCAsmStmt *S) {
222   VisitStmt(S);
223   Record.push_back(S->getNumOutputs());
224   Record.push_back(S->getNumInputs());
225   Record.push_back(S->getNumClobbers());
226   Writer.AddSourceLocation(S->getAsmLoc(), Record);
227   Writer.AddSourceLocation(S->getRParenLoc(), Record);
228   Record.push_back(S->isVolatile());
229   Record.push_back(S->isSimple());
230   Writer.AddStmt(S->getAsmString());
231 
232   // Outputs
233   for (unsigned I = 0, N = S->getNumOutputs(); I != N; ++I) {
234     Writer.AddIdentifierRef(S->getOutputIdentifier(I), Record);
235     Writer.AddStmt(S->getOutputConstraintLiteral(I));
236     Writer.AddStmt(S->getOutputExpr(I));
237   }
238 
239   // Inputs
240   for (unsigned I = 0, N = S->getNumInputs(); I != N; ++I) {
241     Writer.AddIdentifierRef(S->getInputIdentifier(I), Record);
242     Writer.AddStmt(S->getInputConstraintLiteral(I));
243     Writer.AddStmt(S->getInputExpr(I));
244   }
245 
246   // Clobbers
247   for (unsigned I = 0, N = S->getNumClobbers(); I != N; ++I)
248     Writer.AddStmt(S->getClobberStringLiteral(I));
249 
250   Code = serialization::STMT_GCCASM;
251 }
252 
253 void ASTStmtWriter::VisitMSAsmStmt(MSAsmStmt *S) {
254   // FIXME: Statement writer not yet implemented for MS style inline asm.
255   VisitStmt(S);
256 
257   Code = serialization::STMT_MSASM;
258 }
259 
260 void ASTStmtWriter::VisitExpr(Expr *E) {
261   VisitStmt(E);
262   Writer.AddTypeRef(E->getType(), Record);
263   Record.push_back(E->isTypeDependent());
264   Record.push_back(E->isValueDependent());
265   Record.push_back(E->isInstantiationDependent());
266   Record.push_back(E->containsUnexpandedParameterPack());
267   Record.push_back(E->getValueKind());
268   Record.push_back(E->getObjectKind());
269 }
270 
271 void ASTStmtWriter::VisitPredefinedExpr(PredefinedExpr *E) {
272   VisitExpr(E);
273   Writer.AddSourceLocation(E->getLocation(), Record);
274   Record.push_back(E->getIdentType()); // FIXME: stable encoding
275   Code = serialization::EXPR_PREDEFINED;
276 }
277 
278 void ASTStmtWriter::VisitDeclRefExpr(DeclRefExpr *E) {
279   VisitExpr(E);
280 
281   Record.push_back(E->hasQualifier());
282   Record.push_back(E->getDecl() != E->getFoundDecl());
283   Record.push_back(E->hasTemplateKWAndArgsInfo());
284   Record.push_back(E->hadMultipleCandidates());
285   Record.push_back(E->refersToEnclosingLocal());
286 
287   if (E->hasTemplateKWAndArgsInfo()) {
288     unsigned NumTemplateArgs = E->getNumTemplateArgs();
289     Record.push_back(NumTemplateArgs);
290   }
291 
292   DeclarationName::NameKind nk = (E->getDecl()->getDeclName().getNameKind());
293 
294   if ((!E->hasTemplateKWAndArgsInfo()) && (!E->hasQualifier()) &&
295       (E->getDecl() == E->getFoundDecl()) &&
296       nk == DeclarationName::Identifier) {
297     AbbrevToUse = Writer.getDeclRefExprAbbrev();
298   }
299 
300   if (E->hasQualifier())
301     Writer.AddNestedNameSpecifierLoc(E->getQualifierLoc(), Record);
302 
303   if (E->getDecl() != E->getFoundDecl())
304     Writer.AddDeclRef(E->getFoundDecl(), Record);
305 
306   if (E->hasTemplateKWAndArgsInfo())
307     AddTemplateKWAndArgsInfo(*E->getTemplateKWAndArgsInfo());
308 
309   Writer.AddDeclRef(E->getDecl(), Record);
310   Writer.AddSourceLocation(E->getLocation(), Record);
311   Writer.AddDeclarationNameLoc(E->DNLoc, E->getDecl()->getDeclName(), Record);
312   Code = serialization::EXPR_DECL_REF;
313 }
314 
315 void ASTStmtWriter::VisitIntegerLiteral(IntegerLiteral *E) {
316   VisitExpr(E);
317   Writer.AddSourceLocation(E->getLocation(), Record);
318   Writer.AddAPInt(E->getValue(), Record);
319 
320   if (E->getValue().getBitWidth() == 32) {
321     AbbrevToUse = Writer.getIntegerLiteralAbbrev();
322   }
323 
324   Code = serialization::EXPR_INTEGER_LITERAL;
325 }
326 
327 void ASTStmtWriter::VisitFloatingLiteral(FloatingLiteral *E) {
328   VisitExpr(E);
329   Writer.AddAPFloat(E->getValue(), Record);
330   Record.push_back(E->isExact());
331   Writer.AddSourceLocation(E->getLocation(), Record);
332   Code = serialization::EXPR_FLOATING_LITERAL;
333 }
334 
335 void ASTStmtWriter::VisitImaginaryLiteral(ImaginaryLiteral *E) {
336   VisitExpr(E);
337   Writer.AddStmt(E->getSubExpr());
338   Code = serialization::EXPR_IMAGINARY_LITERAL;
339 }
340 
341 void ASTStmtWriter::VisitStringLiteral(StringLiteral *E) {
342   VisitExpr(E);
343   Record.push_back(E->getByteLength());
344   Record.push_back(E->getNumConcatenated());
345   Record.push_back(E->getKind());
346   Record.push_back(E->isPascal());
347   // FIXME: String data should be stored as a blob at the end of the
348   // StringLiteral. However, we can't do so now because we have no
349   // provision for coping with abbreviations when we're jumping around
350   // the AST file during deserialization.
351   Record.append(E->getBytes().begin(), E->getBytes().end());
352   for (unsigned I = 0, N = E->getNumConcatenated(); I != N; ++I)
353     Writer.AddSourceLocation(E->getStrTokenLoc(I), Record);
354   Code = serialization::EXPR_STRING_LITERAL;
355 }
356 
357 void ASTStmtWriter::VisitCharacterLiteral(CharacterLiteral *E) {
358   VisitExpr(E);
359   Record.push_back(E->getValue());
360   Writer.AddSourceLocation(E->getLocation(), Record);
361   Record.push_back(E->getKind());
362 
363   AbbrevToUse = Writer.getCharacterLiteralAbbrev();
364 
365   Code = serialization::EXPR_CHARACTER_LITERAL;
366 }
367 
368 void ASTStmtWriter::VisitParenExpr(ParenExpr *E) {
369   VisitExpr(E);
370   Writer.AddSourceLocation(E->getLParen(), Record);
371   Writer.AddSourceLocation(E->getRParen(), Record);
372   Writer.AddStmt(E->getSubExpr());
373   Code = serialization::EXPR_PAREN;
374 }
375 
376 void ASTStmtWriter::VisitParenListExpr(ParenListExpr *E) {
377   VisitExpr(E);
378   Record.push_back(E->NumExprs);
379   for (unsigned i=0; i != E->NumExprs; ++i)
380     Writer.AddStmt(E->Exprs[i]);
381   Writer.AddSourceLocation(E->LParenLoc, Record);
382   Writer.AddSourceLocation(E->RParenLoc, Record);
383   Code = serialization::EXPR_PAREN_LIST;
384 }
385 
386 void ASTStmtWriter::VisitUnaryOperator(UnaryOperator *E) {
387   VisitExpr(E);
388   Writer.AddStmt(E->getSubExpr());
389   Record.push_back(E->getOpcode()); // FIXME: stable encoding
390   Writer.AddSourceLocation(E->getOperatorLoc(), Record);
391   Code = serialization::EXPR_UNARY_OPERATOR;
392 }
393 
394 void ASTStmtWriter::VisitOffsetOfExpr(OffsetOfExpr *E) {
395   VisitExpr(E);
396   Record.push_back(E->getNumComponents());
397   Record.push_back(E->getNumExpressions());
398   Writer.AddSourceLocation(E->getOperatorLoc(), Record);
399   Writer.AddSourceLocation(E->getRParenLoc(), Record);
400   Writer.AddTypeSourceInfo(E->getTypeSourceInfo(), Record);
401   for (unsigned I = 0, N = E->getNumComponents(); I != N; ++I) {
402     const OffsetOfExpr::OffsetOfNode &ON = E->getComponent(I);
403     Record.push_back(ON.getKind()); // FIXME: Stable encoding
404     Writer.AddSourceLocation(ON.getSourceRange().getBegin(), Record);
405     Writer.AddSourceLocation(ON.getSourceRange().getEnd(), Record);
406     switch (ON.getKind()) {
407     case OffsetOfExpr::OffsetOfNode::Array:
408       Record.push_back(ON.getArrayExprIndex());
409       break;
410 
411     case OffsetOfExpr::OffsetOfNode::Field:
412       Writer.AddDeclRef(ON.getField(), Record);
413       break;
414 
415     case OffsetOfExpr::OffsetOfNode::Identifier:
416       Writer.AddIdentifierRef(ON.getFieldName(), Record);
417       break;
418 
419     case OffsetOfExpr::OffsetOfNode::Base:
420       Writer.AddCXXBaseSpecifier(*ON.getBase(), Record);
421       break;
422     }
423   }
424   for (unsigned I = 0, N = E->getNumExpressions(); I != N; ++I)
425     Writer.AddStmt(E->getIndexExpr(I));
426   Code = serialization::EXPR_OFFSETOF;
427 }
428 
429 void ASTStmtWriter::VisitUnaryExprOrTypeTraitExpr(UnaryExprOrTypeTraitExpr *E) {
430   VisitExpr(E);
431   Record.push_back(E->getKind());
432   if (E->isArgumentType())
433     Writer.AddTypeSourceInfo(E->getArgumentTypeInfo(), Record);
434   else {
435     Record.push_back(0);
436     Writer.AddStmt(E->getArgumentExpr());
437   }
438   Writer.AddSourceLocation(E->getOperatorLoc(), Record);
439   Writer.AddSourceLocation(E->getRParenLoc(), Record);
440   Code = serialization::EXPR_SIZEOF_ALIGN_OF;
441 }
442 
443 void ASTStmtWriter::VisitArraySubscriptExpr(ArraySubscriptExpr *E) {
444   VisitExpr(E);
445   Writer.AddStmt(E->getLHS());
446   Writer.AddStmt(E->getRHS());
447   Writer.AddSourceLocation(E->getRBracketLoc(), Record);
448   Code = serialization::EXPR_ARRAY_SUBSCRIPT;
449 }
450 
451 void ASTStmtWriter::VisitCallExpr(CallExpr *E) {
452   VisitExpr(E);
453   Record.push_back(E->getNumArgs());
454   Writer.AddSourceLocation(E->getRParenLoc(), Record);
455   Writer.AddStmt(E->getCallee());
456   for (CallExpr::arg_iterator Arg = E->arg_begin(), ArgEnd = E->arg_end();
457        Arg != ArgEnd; ++Arg)
458     Writer.AddStmt(*Arg);
459   Code = serialization::EXPR_CALL;
460 }
461 
462 void ASTStmtWriter::VisitMemberExpr(MemberExpr *E) {
463   // Don't call VisitExpr, we'll write everything here.
464 
465   Record.push_back(E->hasQualifier());
466   if (E->hasQualifier())
467     Writer.AddNestedNameSpecifierLoc(E->getQualifierLoc(), Record);
468 
469   Record.push_back(E->HasTemplateKWAndArgsInfo);
470   if (E->HasTemplateKWAndArgsInfo) {
471     Writer.AddSourceLocation(E->getTemplateKeywordLoc(), Record);
472     unsigned NumTemplateArgs = E->getNumTemplateArgs();
473     Record.push_back(NumTemplateArgs);
474     Writer.AddSourceLocation(E->getLAngleLoc(), Record);
475     Writer.AddSourceLocation(E->getRAngleLoc(), Record);
476     for (unsigned i=0; i != NumTemplateArgs; ++i)
477       Writer.AddTemplateArgumentLoc(E->getTemplateArgs()[i], Record);
478   }
479 
480   Record.push_back(E->hadMultipleCandidates());
481 
482   DeclAccessPair FoundDecl = E->getFoundDecl();
483   Writer.AddDeclRef(FoundDecl.getDecl(), Record);
484   Record.push_back(FoundDecl.getAccess());
485 
486   Writer.AddTypeRef(E->getType(), Record);
487   Record.push_back(E->getValueKind());
488   Record.push_back(E->getObjectKind());
489   Writer.AddStmt(E->getBase());
490   Writer.AddDeclRef(E->getMemberDecl(), Record);
491   Writer.AddSourceLocation(E->getMemberLoc(), Record);
492   Record.push_back(E->isArrow());
493   Writer.AddDeclarationNameLoc(E->MemberDNLoc,
494                                E->getMemberDecl()->getDeclName(), Record);
495   Code = serialization::EXPR_MEMBER;
496 }
497 
498 void ASTStmtWriter::VisitObjCIsaExpr(ObjCIsaExpr *E) {
499   VisitExpr(E);
500   Writer.AddStmt(E->getBase());
501   Writer.AddSourceLocation(E->getIsaMemberLoc(), Record);
502   Record.push_back(E->isArrow());
503   Code = serialization::EXPR_OBJC_ISA;
504 }
505 
506 void ASTStmtWriter::
507 VisitObjCIndirectCopyRestoreExpr(ObjCIndirectCopyRestoreExpr *E) {
508   VisitExpr(E);
509   Writer.AddStmt(E->getSubExpr());
510   Record.push_back(E->shouldCopy());
511   Code = serialization::EXPR_OBJC_INDIRECT_COPY_RESTORE;
512 }
513 
514 void ASTStmtWriter::VisitObjCBridgedCastExpr(ObjCBridgedCastExpr *E) {
515   VisitExplicitCastExpr(E);
516   Writer.AddSourceLocation(E->getLParenLoc(), Record);
517   Writer.AddSourceLocation(E->getBridgeKeywordLoc(), Record);
518   Record.push_back(E->getBridgeKind()); // FIXME: Stable encoding
519   Code = serialization::EXPR_OBJC_BRIDGED_CAST;
520 }
521 
522 void ASTStmtWriter::VisitCastExpr(CastExpr *E) {
523   VisitExpr(E);
524   Record.push_back(E->path_size());
525   Writer.AddStmt(E->getSubExpr());
526   Record.push_back(E->getCastKind()); // FIXME: stable encoding
527 
528   for (CastExpr::path_iterator
529          PI = E->path_begin(), PE = E->path_end(); PI != PE; ++PI)
530     Writer.AddCXXBaseSpecifier(**PI, Record);
531 }
532 
533 void ASTStmtWriter::VisitBinaryOperator(BinaryOperator *E) {
534   VisitExpr(E);
535   Writer.AddStmt(E->getLHS());
536   Writer.AddStmt(E->getRHS());
537   Record.push_back(E->getOpcode()); // FIXME: stable encoding
538   Writer.AddSourceLocation(E->getOperatorLoc(), Record);
539   Record.push_back(E->isFPContractable());
540   Code = serialization::EXPR_BINARY_OPERATOR;
541 }
542 
543 void ASTStmtWriter::VisitCompoundAssignOperator(CompoundAssignOperator *E) {
544   VisitBinaryOperator(E);
545   Writer.AddTypeRef(E->getComputationLHSType(), Record);
546   Writer.AddTypeRef(E->getComputationResultType(), Record);
547   Code = serialization::EXPR_COMPOUND_ASSIGN_OPERATOR;
548 }
549 
550 void ASTStmtWriter::VisitConditionalOperator(ConditionalOperator *E) {
551   VisitExpr(E);
552   Writer.AddStmt(E->getCond());
553   Writer.AddStmt(E->getLHS());
554   Writer.AddStmt(E->getRHS());
555   Writer.AddSourceLocation(E->getQuestionLoc(), Record);
556   Writer.AddSourceLocation(E->getColonLoc(), Record);
557   Code = serialization::EXPR_CONDITIONAL_OPERATOR;
558 }
559 
560 void
561 ASTStmtWriter::VisitBinaryConditionalOperator(BinaryConditionalOperator *E) {
562   VisitExpr(E);
563   Writer.AddStmt(E->getOpaqueValue());
564   Writer.AddStmt(E->getCommon());
565   Writer.AddStmt(E->getCond());
566   Writer.AddStmt(E->getTrueExpr());
567   Writer.AddStmt(E->getFalseExpr());
568   Writer.AddSourceLocation(E->getQuestionLoc(), Record);
569   Writer.AddSourceLocation(E->getColonLoc(), Record);
570   Code = serialization::EXPR_BINARY_CONDITIONAL_OPERATOR;
571 }
572 
573 void ASTStmtWriter::VisitImplicitCastExpr(ImplicitCastExpr *E) {
574   VisitCastExpr(E);
575   Code = serialization::EXPR_IMPLICIT_CAST;
576 }
577 
578 void ASTStmtWriter::VisitExplicitCastExpr(ExplicitCastExpr *E) {
579   VisitCastExpr(E);
580   Writer.AddTypeSourceInfo(E->getTypeInfoAsWritten(), Record);
581 }
582 
583 void ASTStmtWriter::VisitCStyleCastExpr(CStyleCastExpr *E) {
584   VisitExplicitCastExpr(E);
585   Writer.AddSourceLocation(E->getLParenLoc(), Record);
586   Writer.AddSourceLocation(E->getRParenLoc(), Record);
587   Code = serialization::EXPR_CSTYLE_CAST;
588 }
589 
590 void ASTStmtWriter::VisitCompoundLiteralExpr(CompoundLiteralExpr *E) {
591   VisitExpr(E);
592   Writer.AddSourceLocation(E->getLParenLoc(), Record);
593   Writer.AddTypeSourceInfo(E->getTypeSourceInfo(), Record);
594   Writer.AddStmt(E->getInitializer());
595   Record.push_back(E->isFileScope());
596   Code = serialization::EXPR_COMPOUND_LITERAL;
597 }
598 
599 void ASTStmtWriter::VisitExtVectorElementExpr(ExtVectorElementExpr *E) {
600   VisitExpr(E);
601   Writer.AddStmt(E->getBase());
602   Writer.AddIdentifierRef(&E->getAccessor(), Record);
603   Writer.AddSourceLocation(E->getAccessorLoc(), Record);
604   Code = serialization::EXPR_EXT_VECTOR_ELEMENT;
605 }
606 
607 void ASTStmtWriter::VisitInitListExpr(InitListExpr *E) {
608   VisitExpr(E);
609   // NOTE: only add the (possibly null) syntactic form.
610   // No need to serialize the isSemanticForm flag and the semantic form.
611   Writer.AddStmt(E->getSyntacticForm());
612   Writer.AddSourceLocation(E->getLBraceLoc(), Record);
613   Writer.AddSourceLocation(E->getRBraceLoc(), Record);
614   bool isArrayFiller = E->ArrayFillerOrUnionFieldInit.is<Expr*>();
615   Record.push_back(isArrayFiller);
616   if (isArrayFiller)
617     Writer.AddStmt(E->getArrayFiller());
618   else
619     Writer.AddDeclRef(E->getInitializedFieldInUnion(), Record);
620   Record.push_back(E->hadArrayRangeDesignator());
621   Record.push_back(E->initializesStdInitializerList());
622   Record.push_back(E->getNumInits());
623   if (isArrayFiller) {
624     // ArrayFiller may have filled "holes" due to designated initializer.
625     // Replace them by 0 to indicate that the filler goes in that place.
626     Expr *filler = E->getArrayFiller();
627     for (unsigned I = 0, N = E->getNumInits(); I != N; ++I)
628       Writer.AddStmt(E->getInit(I) != filler ? E->getInit(I) : 0);
629   } else {
630     for (unsigned I = 0, N = E->getNumInits(); I != N; ++I)
631       Writer.AddStmt(E->getInit(I));
632   }
633   Code = serialization::EXPR_INIT_LIST;
634 }
635 
636 void ASTStmtWriter::VisitDesignatedInitExpr(DesignatedInitExpr *E) {
637   VisitExpr(E);
638   Record.push_back(E->getNumSubExprs());
639   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
640     Writer.AddStmt(E->getSubExpr(I));
641   Writer.AddSourceLocation(E->getEqualOrColonLoc(), Record);
642   Record.push_back(E->usesGNUSyntax());
643   for (DesignatedInitExpr::designators_iterator D = E->designators_begin(),
644                                              DEnd = E->designators_end();
645        D != DEnd; ++D) {
646     if (D->isFieldDesignator()) {
647       if (FieldDecl *Field = D->getField()) {
648         Record.push_back(serialization::DESIG_FIELD_DECL);
649         Writer.AddDeclRef(Field, Record);
650       } else {
651         Record.push_back(serialization::DESIG_FIELD_NAME);
652         Writer.AddIdentifierRef(D->getFieldName(), Record);
653       }
654       Writer.AddSourceLocation(D->getDotLoc(), Record);
655       Writer.AddSourceLocation(D->getFieldLoc(), Record);
656     } else if (D->isArrayDesignator()) {
657       Record.push_back(serialization::DESIG_ARRAY);
658       Record.push_back(D->getFirstExprIndex());
659       Writer.AddSourceLocation(D->getLBracketLoc(), Record);
660       Writer.AddSourceLocation(D->getRBracketLoc(), Record);
661     } else {
662       assert(D->isArrayRangeDesignator() && "Unknown designator");
663       Record.push_back(serialization::DESIG_ARRAY_RANGE);
664       Record.push_back(D->getFirstExprIndex());
665       Writer.AddSourceLocation(D->getLBracketLoc(), Record);
666       Writer.AddSourceLocation(D->getEllipsisLoc(), Record);
667       Writer.AddSourceLocation(D->getRBracketLoc(), Record);
668     }
669   }
670   Code = serialization::EXPR_DESIGNATED_INIT;
671 }
672 
673 void ASTStmtWriter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) {
674   VisitExpr(E);
675   Code = serialization::EXPR_IMPLICIT_VALUE_INIT;
676 }
677 
678 void ASTStmtWriter::VisitVAArgExpr(VAArgExpr *E) {
679   VisitExpr(E);
680   Writer.AddStmt(E->getSubExpr());
681   Writer.AddTypeSourceInfo(E->getWrittenTypeInfo(), Record);
682   Writer.AddSourceLocation(E->getBuiltinLoc(), Record);
683   Writer.AddSourceLocation(E->getRParenLoc(), Record);
684   Code = serialization::EXPR_VA_ARG;
685 }
686 
687 void ASTStmtWriter::VisitAddrLabelExpr(AddrLabelExpr *E) {
688   VisitExpr(E);
689   Writer.AddSourceLocation(E->getAmpAmpLoc(), Record);
690   Writer.AddSourceLocation(E->getLabelLoc(), Record);
691   Writer.AddDeclRef(E->getLabel(), Record);
692   Code = serialization::EXPR_ADDR_LABEL;
693 }
694 
695 void ASTStmtWriter::VisitStmtExpr(StmtExpr *E) {
696   VisitExpr(E);
697   Writer.AddStmt(E->getSubStmt());
698   Writer.AddSourceLocation(E->getLParenLoc(), Record);
699   Writer.AddSourceLocation(E->getRParenLoc(), Record);
700   Code = serialization::EXPR_STMT;
701 }
702 
703 void ASTStmtWriter::VisitChooseExpr(ChooseExpr *E) {
704   VisitExpr(E);
705   Writer.AddStmt(E->getCond());
706   Writer.AddStmt(E->getLHS());
707   Writer.AddStmt(E->getRHS());
708   Writer.AddSourceLocation(E->getBuiltinLoc(), Record);
709   Writer.AddSourceLocation(E->getRParenLoc(), Record);
710   Code = serialization::EXPR_CHOOSE;
711 }
712 
713 void ASTStmtWriter::VisitGNUNullExpr(GNUNullExpr *E) {
714   VisitExpr(E);
715   Writer.AddSourceLocation(E->getTokenLocation(), Record);
716   Code = serialization::EXPR_GNU_NULL;
717 }
718 
719 void ASTStmtWriter::VisitShuffleVectorExpr(ShuffleVectorExpr *E) {
720   VisitExpr(E);
721   Record.push_back(E->getNumSubExprs());
722   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
723     Writer.AddStmt(E->getExpr(I));
724   Writer.AddSourceLocation(E->getBuiltinLoc(), Record);
725   Writer.AddSourceLocation(E->getRParenLoc(), Record);
726   Code = serialization::EXPR_SHUFFLE_VECTOR;
727 }
728 
729 void ASTStmtWriter::VisitBlockExpr(BlockExpr *E) {
730   VisitExpr(E);
731   Writer.AddDeclRef(E->getBlockDecl(), Record);
732   Code = serialization::EXPR_BLOCK;
733 }
734 
735 void ASTStmtWriter::VisitGenericSelectionExpr(GenericSelectionExpr *E) {
736   VisitExpr(E);
737   Record.push_back(E->getNumAssocs());
738 
739   Writer.AddStmt(E->getControllingExpr());
740   for (unsigned I = 0, N = E->getNumAssocs(); I != N; ++I) {
741     Writer.AddTypeSourceInfo(E->getAssocTypeSourceInfo(I), Record);
742     Writer.AddStmt(E->getAssocExpr(I));
743   }
744   Record.push_back(E->isResultDependent() ? -1U : E->getResultIndex());
745 
746   Writer.AddSourceLocation(E->getGenericLoc(), Record);
747   Writer.AddSourceLocation(E->getDefaultLoc(), Record);
748   Writer.AddSourceLocation(E->getRParenLoc(), Record);
749   Code = serialization::EXPR_GENERIC_SELECTION;
750 }
751 
752 void ASTStmtWriter::VisitPseudoObjectExpr(PseudoObjectExpr *E) {
753   VisitExpr(E);
754   Record.push_back(E->getNumSemanticExprs());
755 
756   // Push the result index.  Currently, this needs to exactly match
757   // the encoding used internally for ResultIndex.
758   unsigned result = E->getResultExprIndex();
759   result = (result == PseudoObjectExpr::NoResult ? 0 : result + 1);
760   Record.push_back(result);
761 
762   Writer.AddStmt(E->getSyntacticForm());
763   for (PseudoObjectExpr::semantics_iterator
764          i = E->semantics_begin(), e = E->semantics_end(); i != e; ++i) {
765     Writer.AddStmt(*i);
766   }
767   Code = serialization::EXPR_PSEUDO_OBJECT;
768 }
769 
770 void ASTStmtWriter::VisitAtomicExpr(AtomicExpr *E) {
771   VisitExpr(E);
772   Record.push_back(E->getOp());
773   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
774     Writer.AddStmt(E->getSubExprs()[I]);
775   Writer.AddSourceLocation(E->getBuiltinLoc(), Record);
776   Writer.AddSourceLocation(E->getRParenLoc(), Record);
777   Code = serialization::EXPR_ATOMIC;
778 }
779 
780 //===----------------------------------------------------------------------===//
781 // Objective-C Expressions and Statements.
782 //===----------------------------------------------------------------------===//
783 
784 void ASTStmtWriter::VisitObjCStringLiteral(ObjCStringLiteral *E) {
785   VisitExpr(E);
786   Writer.AddStmt(E->getString());
787   Writer.AddSourceLocation(E->getAtLoc(), Record);
788   Code = serialization::EXPR_OBJC_STRING_LITERAL;
789 }
790 
791 void ASTStmtWriter::VisitObjCBoxedExpr(ObjCBoxedExpr *E) {
792   VisitExpr(E);
793   Writer.AddStmt(E->getSubExpr());
794   Writer.AddDeclRef(E->getBoxingMethod(), Record);
795   Writer.AddSourceRange(E->getSourceRange(), Record);
796   Code = serialization::EXPR_OBJC_BOXED_EXPRESSION;
797 }
798 
799 void ASTStmtWriter::VisitObjCArrayLiteral(ObjCArrayLiteral *E) {
800   VisitExpr(E);
801   Record.push_back(E->getNumElements());
802   for (unsigned i = 0; i < E->getNumElements(); i++)
803     Writer.AddStmt(E->getElement(i));
804   Writer.AddDeclRef(E->getArrayWithObjectsMethod(), Record);
805   Writer.AddSourceRange(E->getSourceRange(), Record);
806   Code = serialization::EXPR_OBJC_ARRAY_LITERAL;
807 }
808 
809 void ASTStmtWriter::VisitObjCDictionaryLiteral(ObjCDictionaryLiteral *E) {
810   VisitExpr(E);
811   Record.push_back(E->getNumElements());
812   Record.push_back(E->HasPackExpansions);
813   for (unsigned i = 0; i < E->getNumElements(); i++) {
814     ObjCDictionaryElement Element = E->getKeyValueElement(i);
815     Writer.AddStmt(Element.Key);
816     Writer.AddStmt(Element.Value);
817     if (E->HasPackExpansions) {
818       Writer.AddSourceLocation(Element.EllipsisLoc, Record);
819       unsigned NumExpansions = 0;
820       if (Element.NumExpansions)
821         NumExpansions = *Element.NumExpansions + 1;
822       Record.push_back(NumExpansions);
823     }
824   }
825 
826   Writer.AddDeclRef(E->getDictWithObjectsMethod(), Record);
827   Writer.AddSourceRange(E->getSourceRange(), Record);
828   Code = serialization::EXPR_OBJC_DICTIONARY_LITERAL;
829 }
830 
831 void ASTStmtWriter::VisitObjCEncodeExpr(ObjCEncodeExpr *E) {
832   VisitExpr(E);
833   Writer.AddTypeSourceInfo(E->getEncodedTypeSourceInfo(), Record);
834   Writer.AddSourceLocation(E->getAtLoc(), Record);
835   Writer.AddSourceLocation(E->getRParenLoc(), Record);
836   Code = serialization::EXPR_OBJC_ENCODE;
837 }
838 
839 void ASTStmtWriter::VisitObjCSelectorExpr(ObjCSelectorExpr *E) {
840   VisitExpr(E);
841   Writer.AddSelectorRef(E->getSelector(), Record);
842   Writer.AddSourceLocation(E->getAtLoc(), Record);
843   Writer.AddSourceLocation(E->getRParenLoc(), Record);
844   Code = serialization::EXPR_OBJC_SELECTOR_EXPR;
845 }
846 
847 void ASTStmtWriter::VisitObjCProtocolExpr(ObjCProtocolExpr *E) {
848   VisitExpr(E);
849   Writer.AddDeclRef(E->getProtocol(), Record);
850   Writer.AddSourceLocation(E->getAtLoc(), Record);
851   Writer.AddSourceLocation(E->ProtoLoc, Record);
852   Writer.AddSourceLocation(E->getRParenLoc(), Record);
853   Code = serialization::EXPR_OBJC_PROTOCOL_EXPR;
854 }
855 
856 void ASTStmtWriter::VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) {
857   VisitExpr(E);
858   Writer.AddDeclRef(E->getDecl(), Record);
859   Writer.AddSourceLocation(E->getLocation(), Record);
860   Writer.AddStmt(E->getBase());
861   Record.push_back(E->isArrow());
862   Record.push_back(E->isFreeIvar());
863   Code = serialization::EXPR_OBJC_IVAR_REF_EXPR;
864 }
865 
866 void ASTStmtWriter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) {
867   VisitExpr(E);
868   Record.push_back(E->SetterAndMethodRefFlags.getInt());
869   Record.push_back(E->isImplicitProperty());
870   if (E->isImplicitProperty()) {
871     Writer.AddDeclRef(E->getImplicitPropertyGetter(), Record);
872     Writer.AddDeclRef(E->getImplicitPropertySetter(), Record);
873   } else {
874     Writer.AddDeclRef(E->getExplicitProperty(), Record);
875   }
876   Writer.AddSourceLocation(E->getLocation(), Record);
877   Writer.AddSourceLocation(E->getReceiverLocation(), Record);
878   if (E->isObjectReceiver()) {
879     Record.push_back(0);
880     Writer.AddStmt(E->getBase());
881   } else if (E->isSuperReceiver()) {
882     Record.push_back(1);
883     Writer.AddTypeRef(E->getSuperReceiverType(), Record);
884   } else {
885     Record.push_back(2);
886     Writer.AddDeclRef(E->getClassReceiver(), Record);
887   }
888 
889   Code = serialization::EXPR_OBJC_PROPERTY_REF_EXPR;
890 }
891 
892 void ASTStmtWriter::VisitObjCSubscriptRefExpr(ObjCSubscriptRefExpr *E) {
893   VisitExpr(E);
894   Writer.AddSourceLocation(E->getRBracket(), Record);
895   Writer.AddStmt(E->getBaseExpr());
896   Writer.AddStmt(E->getKeyExpr());
897   Writer.AddDeclRef(E->getAtIndexMethodDecl(), Record);
898   Writer.AddDeclRef(E->setAtIndexMethodDecl(), Record);
899 
900   Code = serialization::EXPR_OBJC_SUBSCRIPT_REF_EXPR;
901 }
902 
903 void ASTStmtWriter::VisitObjCMessageExpr(ObjCMessageExpr *E) {
904   VisitExpr(E);
905   Record.push_back(E->getNumArgs());
906   Record.push_back(E->getNumStoredSelLocs());
907   Record.push_back(E->SelLocsKind);
908   Record.push_back(E->isDelegateInitCall());
909   Record.push_back(E->IsImplicit);
910   Record.push_back((unsigned)E->getReceiverKind()); // FIXME: stable encoding
911   switch (E->getReceiverKind()) {
912   case ObjCMessageExpr::Instance:
913     Writer.AddStmt(E->getInstanceReceiver());
914     break;
915 
916   case ObjCMessageExpr::Class:
917     Writer.AddTypeSourceInfo(E->getClassReceiverTypeInfo(), Record);
918     break;
919 
920   case ObjCMessageExpr::SuperClass:
921   case ObjCMessageExpr::SuperInstance:
922     Writer.AddTypeRef(E->getSuperType(), Record);
923     Writer.AddSourceLocation(E->getSuperLoc(), Record);
924     break;
925   }
926 
927   if (E->getMethodDecl()) {
928     Record.push_back(1);
929     Writer.AddDeclRef(E->getMethodDecl(), Record);
930   } else {
931     Record.push_back(0);
932     Writer.AddSelectorRef(E->getSelector(), Record);
933   }
934 
935   Writer.AddSourceLocation(E->getLeftLoc(), Record);
936   Writer.AddSourceLocation(E->getRightLoc(), Record);
937 
938   for (CallExpr::arg_iterator Arg = E->arg_begin(), ArgEnd = E->arg_end();
939        Arg != ArgEnd; ++Arg)
940     Writer.AddStmt(*Arg);
941 
942   SourceLocation *Locs = E->getStoredSelLocs();
943   for (unsigned i = 0, e = E->getNumStoredSelLocs(); i != e; ++i)
944     Writer.AddSourceLocation(Locs[i], Record);
945 
946   Code = serialization::EXPR_OBJC_MESSAGE_EXPR;
947 }
948 
949 void ASTStmtWriter::VisitObjCForCollectionStmt(ObjCForCollectionStmt *S) {
950   VisitStmt(S);
951   Writer.AddStmt(S->getElement());
952   Writer.AddStmt(S->getCollection());
953   Writer.AddStmt(S->getBody());
954   Writer.AddSourceLocation(S->getForLoc(), Record);
955   Writer.AddSourceLocation(S->getRParenLoc(), Record);
956   Code = serialization::STMT_OBJC_FOR_COLLECTION;
957 }
958 
959 void ASTStmtWriter::VisitObjCAtCatchStmt(ObjCAtCatchStmt *S) {
960   Writer.AddStmt(S->getCatchBody());
961   Writer.AddDeclRef(S->getCatchParamDecl(), Record);
962   Writer.AddSourceLocation(S->getAtCatchLoc(), Record);
963   Writer.AddSourceLocation(S->getRParenLoc(), Record);
964   Code = serialization::STMT_OBJC_CATCH;
965 }
966 
967 void ASTStmtWriter::VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *S) {
968   Writer.AddStmt(S->getFinallyBody());
969   Writer.AddSourceLocation(S->getAtFinallyLoc(), Record);
970   Code = serialization::STMT_OBJC_FINALLY;
971 }
972 
973 void ASTStmtWriter::VisitObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S) {
974   Writer.AddStmt(S->getSubStmt());
975   Writer.AddSourceLocation(S->getAtLoc(), Record);
976   Code = serialization::STMT_OBJC_AUTORELEASE_POOL;
977 }
978 
979 void ASTStmtWriter::VisitObjCAtTryStmt(ObjCAtTryStmt *S) {
980   Record.push_back(S->getNumCatchStmts());
981   Record.push_back(S->getFinallyStmt() != 0);
982   Writer.AddStmt(S->getTryBody());
983   for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; ++I)
984     Writer.AddStmt(S->getCatchStmt(I));
985   if (S->getFinallyStmt())
986     Writer.AddStmt(S->getFinallyStmt());
987   Writer.AddSourceLocation(S->getAtTryLoc(), Record);
988   Code = serialization::STMT_OBJC_AT_TRY;
989 }
990 
991 void ASTStmtWriter::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
992   Writer.AddStmt(S->getSynchExpr());
993   Writer.AddStmt(S->getSynchBody());
994   Writer.AddSourceLocation(S->getAtSynchronizedLoc(), Record);
995   Code = serialization::STMT_OBJC_AT_SYNCHRONIZED;
996 }
997 
998 void ASTStmtWriter::VisitObjCAtThrowStmt(ObjCAtThrowStmt *S) {
999   Writer.AddStmt(S->getThrowExpr());
1000   Writer.AddSourceLocation(S->getThrowLoc(), Record);
1001   Code = serialization::STMT_OBJC_AT_THROW;
1002 }
1003 
1004 void ASTStmtWriter::VisitObjCBoolLiteralExpr(ObjCBoolLiteralExpr *E) {
1005   VisitExpr(E);
1006   Record.push_back(E->getValue());
1007   Writer.AddSourceLocation(E->getLocation(), Record);
1008   Code = serialization::EXPR_OBJC_BOOL_LITERAL;
1009 }
1010 
1011 //===----------------------------------------------------------------------===//
1012 // C++ Expressions and Statements.
1013 //===----------------------------------------------------------------------===//
1014 
1015 void ASTStmtWriter::VisitCXXCatchStmt(CXXCatchStmt *S) {
1016   VisitStmt(S);
1017   Writer.AddSourceLocation(S->getCatchLoc(), Record);
1018   Writer.AddDeclRef(S->getExceptionDecl(), Record);
1019   Writer.AddStmt(S->getHandlerBlock());
1020   Code = serialization::STMT_CXX_CATCH;
1021 }
1022 
1023 void ASTStmtWriter::VisitCXXTryStmt(CXXTryStmt *S) {
1024   VisitStmt(S);
1025   Record.push_back(S->getNumHandlers());
1026   Writer.AddSourceLocation(S->getTryLoc(), Record);
1027   Writer.AddStmt(S->getTryBlock());
1028   for (unsigned i = 0, e = S->getNumHandlers(); i != e; ++i)
1029     Writer.AddStmt(S->getHandler(i));
1030   Code = serialization::STMT_CXX_TRY;
1031 }
1032 
1033 void ASTStmtWriter::VisitCXXForRangeStmt(CXXForRangeStmt *S) {
1034   VisitStmt(S);
1035   Writer.AddSourceLocation(S->getForLoc(), Record);
1036   Writer.AddSourceLocation(S->getColonLoc(), Record);
1037   Writer.AddSourceLocation(S->getRParenLoc(), Record);
1038   Writer.AddStmt(S->getRangeStmt());
1039   Writer.AddStmt(S->getBeginEndStmt());
1040   Writer.AddStmt(S->getCond());
1041   Writer.AddStmt(S->getInc());
1042   Writer.AddStmt(S->getLoopVarStmt());
1043   Writer.AddStmt(S->getBody());
1044   Code = serialization::STMT_CXX_FOR_RANGE;
1045 }
1046 
1047 void ASTStmtWriter::VisitMSDependentExistsStmt(MSDependentExistsStmt *S) {
1048   VisitStmt(S);
1049   Writer.AddSourceLocation(S->getKeywordLoc(), Record);
1050   Record.push_back(S->isIfExists());
1051   Writer.AddNestedNameSpecifierLoc(S->getQualifierLoc(), Record);
1052   Writer.AddDeclarationNameInfo(S->getNameInfo(), Record);
1053   Writer.AddStmt(S->getSubStmt());
1054   Code = serialization::STMT_MS_DEPENDENT_EXISTS;
1055 }
1056 
1057 void ASTStmtWriter::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *E) {
1058   VisitCallExpr(E);
1059   Record.push_back(E->getOperator());
1060   Writer.AddSourceRange(E->Range, Record);
1061   Record.push_back(E->isFPContractable());
1062   Code = serialization::EXPR_CXX_OPERATOR_CALL;
1063 }
1064 
1065 void ASTStmtWriter::VisitCXXMemberCallExpr(CXXMemberCallExpr *E) {
1066   VisitCallExpr(E);
1067   Code = serialization::EXPR_CXX_MEMBER_CALL;
1068 }
1069 
1070 void ASTStmtWriter::VisitCXXConstructExpr(CXXConstructExpr *E) {
1071   VisitExpr(E);
1072   Record.push_back(E->getNumArgs());
1073   for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
1074     Writer.AddStmt(E->getArg(I));
1075   Writer.AddDeclRef(E->getConstructor(), Record);
1076   Writer.AddSourceLocation(E->getLocation(), Record);
1077   Record.push_back(E->isElidable());
1078   Record.push_back(E->hadMultipleCandidates());
1079   Record.push_back(E->requiresZeroInitialization());
1080   Record.push_back(E->getConstructionKind()); // FIXME: stable encoding
1081   Writer.AddSourceRange(E->getParenRange(), Record);
1082   Code = serialization::EXPR_CXX_CONSTRUCT;
1083 }
1084 
1085 void ASTStmtWriter::VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *E) {
1086   VisitCXXConstructExpr(E);
1087   Writer.AddTypeSourceInfo(E->getTypeSourceInfo(), Record);
1088   Code = serialization::EXPR_CXX_TEMPORARY_OBJECT;
1089 }
1090 
1091 void ASTStmtWriter::VisitLambdaExpr(LambdaExpr *E) {
1092   VisitExpr(E);
1093   Record.push_back(E->NumCaptures);
1094   unsigned NumArrayIndexVars = 0;
1095   if (E->HasArrayIndexVars)
1096     NumArrayIndexVars = E->getArrayIndexStarts()[E->NumCaptures];
1097   Record.push_back(NumArrayIndexVars);
1098   Writer.AddSourceRange(E->IntroducerRange, Record);
1099   Record.push_back(E->CaptureDefault); // FIXME: stable encoding
1100   Record.push_back(E->ExplicitParams);
1101   Record.push_back(E->ExplicitResultType);
1102   Writer.AddSourceLocation(E->ClosingBrace, Record);
1103 
1104   // Add capture initializers.
1105   for (LambdaExpr::capture_init_iterator C = E->capture_init_begin(),
1106                                       CEnd = E->capture_init_end();
1107        C != CEnd; ++C) {
1108     Writer.AddStmt(*C);
1109   }
1110 
1111   // Add array index variables, if any.
1112   if (NumArrayIndexVars) {
1113     Record.append(E->getArrayIndexStarts(),
1114                   E->getArrayIndexStarts() + E->NumCaptures + 1);
1115     VarDecl **ArrayIndexVars = E->getArrayIndexVars();
1116     for (unsigned I = 0; I != NumArrayIndexVars; ++I)
1117       Writer.AddDeclRef(ArrayIndexVars[I], Record);
1118   }
1119 
1120   Code = serialization::EXPR_LAMBDA;
1121 }
1122 
1123 void ASTStmtWriter::VisitCXXNamedCastExpr(CXXNamedCastExpr *E) {
1124   VisitExplicitCastExpr(E);
1125   Writer.AddSourceRange(SourceRange(E->getOperatorLoc(), E->getRParenLoc()),
1126                         Record);
1127 }
1128 
1129 void ASTStmtWriter::VisitCXXStaticCastExpr(CXXStaticCastExpr *E) {
1130   VisitCXXNamedCastExpr(E);
1131   Code = serialization::EXPR_CXX_STATIC_CAST;
1132 }
1133 
1134 void ASTStmtWriter::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *E) {
1135   VisitCXXNamedCastExpr(E);
1136   Code = serialization::EXPR_CXX_DYNAMIC_CAST;
1137 }
1138 
1139 void ASTStmtWriter::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *E) {
1140   VisitCXXNamedCastExpr(E);
1141   Code = serialization::EXPR_CXX_REINTERPRET_CAST;
1142 }
1143 
1144 void ASTStmtWriter::VisitCXXConstCastExpr(CXXConstCastExpr *E) {
1145   VisitCXXNamedCastExpr(E);
1146   Code = serialization::EXPR_CXX_CONST_CAST;
1147 }
1148 
1149 void ASTStmtWriter::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *E) {
1150   VisitExplicitCastExpr(E);
1151   Writer.AddSourceLocation(E->getTypeBeginLoc(), Record);
1152   Writer.AddSourceLocation(E->getRParenLoc(), Record);
1153   Code = serialization::EXPR_CXX_FUNCTIONAL_CAST;
1154 }
1155 
1156 void ASTStmtWriter::VisitUserDefinedLiteral(UserDefinedLiteral *E) {
1157   VisitCallExpr(E);
1158   Writer.AddSourceLocation(E->UDSuffixLoc, Record);
1159   Code = serialization::EXPR_USER_DEFINED_LITERAL;
1160 }
1161 
1162 void ASTStmtWriter::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *E) {
1163   VisitExpr(E);
1164   Record.push_back(E->getValue());
1165   Writer.AddSourceLocation(E->getLocation(), Record);
1166   Code = serialization::EXPR_CXX_BOOL_LITERAL;
1167 }
1168 
1169 void ASTStmtWriter::VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *E) {
1170   VisitExpr(E);
1171   Writer.AddSourceLocation(E->getLocation(), Record);
1172   Code = serialization::EXPR_CXX_NULL_PTR_LITERAL;
1173 }
1174 
1175 void ASTStmtWriter::VisitCXXTypeidExpr(CXXTypeidExpr *E) {
1176   VisitExpr(E);
1177   Writer.AddSourceRange(E->getSourceRange(), Record);
1178   if (E->isTypeOperand()) {
1179     Writer.AddTypeSourceInfo(E->getTypeOperandSourceInfo(), Record);
1180     Code = serialization::EXPR_CXX_TYPEID_TYPE;
1181   } else {
1182     Writer.AddStmt(E->getExprOperand());
1183     Code = serialization::EXPR_CXX_TYPEID_EXPR;
1184   }
1185 }
1186 
1187 void ASTStmtWriter::VisitCXXThisExpr(CXXThisExpr *E) {
1188   VisitExpr(E);
1189   Writer.AddSourceLocation(E->getLocation(), Record);
1190   Record.push_back(E->isImplicit());
1191   Code = serialization::EXPR_CXX_THIS;
1192 }
1193 
1194 void ASTStmtWriter::VisitCXXThrowExpr(CXXThrowExpr *E) {
1195   VisitExpr(E);
1196   Writer.AddSourceLocation(E->getThrowLoc(), Record);
1197   Writer.AddStmt(E->getSubExpr());
1198   Record.push_back(E->isThrownVariableInScope());
1199   Code = serialization::EXPR_CXX_THROW;
1200 }
1201 
1202 void ASTStmtWriter::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *E) {
1203   VisitExpr(E);
1204 
1205   bool HasOtherExprStored = E->Param.getInt();
1206   // Store these first, the reader reads them before creation.
1207   Record.push_back(HasOtherExprStored);
1208   if (HasOtherExprStored)
1209     Writer.AddStmt(E->getExpr());
1210   Writer.AddDeclRef(E->getParam(), Record);
1211   Writer.AddSourceLocation(E->getUsedLocation(), Record);
1212 
1213   Code = serialization::EXPR_CXX_DEFAULT_ARG;
1214 }
1215 
1216 void ASTStmtWriter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) {
1217   VisitExpr(E);
1218   Writer.AddCXXTemporary(E->getTemporary(), Record);
1219   Writer.AddStmt(E->getSubExpr());
1220   Code = serialization::EXPR_CXX_BIND_TEMPORARY;
1221 }
1222 
1223 void ASTStmtWriter::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) {
1224   VisitExpr(E);
1225   Writer.AddTypeSourceInfo(E->getTypeSourceInfo(), Record);
1226   Writer.AddSourceLocation(E->getRParenLoc(), Record);
1227   Code = serialization::EXPR_CXX_SCALAR_VALUE_INIT;
1228 }
1229 
1230 void ASTStmtWriter::VisitCXXNewExpr(CXXNewExpr *E) {
1231   VisitExpr(E);
1232   Record.push_back(E->isGlobalNew());
1233   Record.push_back(E->isArray());
1234   Record.push_back(E->doesUsualArrayDeleteWantSize());
1235   Record.push_back(E->getNumPlacementArgs());
1236   Record.push_back(E->StoredInitializationStyle);
1237   Writer.AddDeclRef(E->getOperatorNew(), Record);
1238   Writer.AddDeclRef(E->getOperatorDelete(), Record);
1239   Writer.AddTypeSourceInfo(E->getAllocatedTypeSourceInfo(), Record);
1240   Writer.AddSourceRange(E->getTypeIdParens(), Record);
1241   Writer.AddSourceRange(E->getSourceRange(), Record);
1242   Writer.AddSourceRange(E->getDirectInitRange(), Record);
1243   for (CXXNewExpr::arg_iterator I = E->raw_arg_begin(), e = E->raw_arg_end();
1244        I != e; ++I)
1245     Writer.AddStmt(*I);
1246 
1247   Code = serialization::EXPR_CXX_NEW;
1248 }
1249 
1250 void ASTStmtWriter::VisitCXXDeleteExpr(CXXDeleteExpr *E) {
1251   VisitExpr(E);
1252   Record.push_back(E->isGlobalDelete());
1253   Record.push_back(E->isArrayForm());
1254   Record.push_back(E->isArrayFormAsWritten());
1255   Record.push_back(E->doesUsualArrayDeleteWantSize());
1256   Writer.AddDeclRef(E->getOperatorDelete(), Record);
1257   Writer.AddStmt(E->getArgument());
1258   Writer.AddSourceLocation(E->getSourceRange().getBegin(), Record);
1259 
1260   Code = serialization::EXPR_CXX_DELETE;
1261 }
1262 
1263 void ASTStmtWriter::VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E) {
1264   VisitExpr(E);
1265 
1266   Writer.AddStmt(E->getBase());
1267   Record.push_back(E->isArrow());
1268   Writer.AddSourceLocation(E->getOperatorLoc(), Record);
1269   Writer.AddNestedNameSpecifierLoc(E->getQualifierLoc(), Record);
1270   Writer.AddTypeSourceInfo(E->getScopeTypeInfo(), Record);
1271   Writer.AddSourceLocation(E->getColonColonLoc(), Record);
1272   Writer.AddSourceLocation(E->getTildeLoc(), Record);
1273 
1274   // PseudoDestructorTypeStorage.
1275   Writer.AddIdentifierRef(E->getDestroyedTypeIdentifier(), Record);
1276   if (E->getDestroyedTypeIdentifier())
1277     Writer.AddSourceLocation(E->getDestroyedTypeLoc(), Record);
1278   else
1279     Writer.AddTypeSourceInfo(E->getDestroyedTypeInfo(), Record);
1280 
1281   Code = serialization::EXPR_CXX_PSEUDO_DESTRUCTOR;
1282 }
1283 
1284 void ASTStmtWriter::VisitExprWithCleanups(ExprWithCleanups *E) {
1285   VisitExpr(E);
1286   Record.push_back(E->getNumObjects());
1287   for (unsigned i = 0, e = E->getNumObjects(); i != e; ++i)
1288     Writer.AddDeclRef(E->getObject(i), Record);
1289 
1290   Writer.AddStmt(E->getSubExpr());
1291   Code = serialization::EXPR_EXPR_WITH_CLEANUPS;
1292 }
1293 
1294 void
1295 ASTStmtWriter::VisitCXXDependentScopeMemberExpr(CXXDependentScopeMemberExpr *E){
1296   VisitExpr(E);
1297 
1298   // Don't emit anything here, HasTemplateKWAndArgsInfo must be
1299   // emitted first.
1300 
1301   Record.push_back(E->HasTemplateKWAndArgsInfo);
1302   if (E->HasTemplateKWAndArgsInfo) {
1303     const ASTTemplateKWAndArgsInfo &Args = *E->getTemplateKWAndArgsInfo();
1304     Record.push_back(Args.NumTemplateArgs);
1305     AddTemplateKWAndArgsInfo(Args);
1306   }
1307 
1308   if (!E->isImplicitAccess())
1309     Writer.AddStmt(E->getBase());
1310   else
1311     Writer.AddStmt(0);
1312   Writer.AddTypeRef(E->getBaseType(), Record);
1313   Record.push_back(E->isArrow());
1314   Writer.AddSourceLocation(E->getOperatorLoc(), Record);
1315   Writer.AddNestedNameSpecifierLoc(E->getQualifierLoc(), Record);
1316   Writer.AddDeclRef(E->getFirstQualifierFoundInScope(), Record);
1317   Writer.AddDeclarationNameInfo(E->MemberNameInfo, Record);
1318   Code = serialization::EXPR_CXX_DEPENDENT_SCOPE_MEMBER;
1319 }
1320 
1321 void
1322 ASTStmtWriter::VisitDependentScopeDeclRefExpr(DependentScopeDeclRefExpr *E) {
1323   VisitExpr(E);
1324 
1325   // Don't emit anything here, HasTemplateKWAndArgsInfo must be
1326   // emitted first.
1327 
1328   Record.push_back(E->HasTemplateKWAndArgsInfo);
1329   if (E->HasTemplateKWAndArgsInfo) {
1330     const ASTTemplateKWAndArgsInfo &Args = *E->getTemplateKWAndArgsInfo();
1331     Record.push_back(Args.NumTemplateArgs);
1332     AddTemplateKWAndArgsInfo(Args);
1333   }
1334 
1335   Writer.AddNestedNameSpecifierLoc(E->getQualifierLoc(), Record);
1336   Writer.AddDeclarationNameInfo(E->NameInfo, Record);
1337   Code = serialization::EXPR_CXX_DEPENDENT_SCOPE_DECL_REF;
1338 }
1339 
1340 void
1341 ASTStmtWriter::VisitCXXUnresolvedConstructExpr(CXXUnresolvedConstructExpr *E) {
1342   VisitExpr(E);
1343   Record.push_back(E->arg_size());
1344   for (CXXUnresolvedConstructExpr::arg_iterator
1345          ArgI = E->arg_begin(), ArgE = E->arg_end(); ArgI != ArgE; ++ArgI)
1346     Writer.AddStmt(*ArgI);
1347   Writer.AddTypeSourceInfo(E->getTypeSourceInfo(), Record);
1348   Writer.AddSourceLocation(E->getLParenLoc(), Record);
1349   Writer.AddSourceLocation(E->getRParenLoc(), Record);
1350   Code = serialization::EXPR_CXX_UNRESOLVED_CONSTRUCT;
1351 }
1352 
1353 void ASTStmtWriter::VisitOverloadExpr(OverloadExpr *E) {
1354   VisitExpr(E);
1355 
1356   // Don't emit anything here, HasTemplateKWAndArgsInfo must be
1357   // emitted first.
1358 
1359   Record.push_back(E->HasTemplateKWAndArgsInfo);
1360   if (E->HasTemplateKWAndArgsInfo) {
1361     const ASTTemplateKWAndArgsInfo &Args = *E->getTemplateKWAndArgsInfo();
1362     Record.push_back(Args.NumTemplateArgs);
1363     AddTemplateKWAndArgsInfo(Args);
1364   }
1365 
1366   Record.push_back(E->getNumDecls());
1367   for (OverloadExpr::decls_iterator
1368          OvI = E->decls_begin(), OvE = E->decls_end(); OvI != OvE; ++OvI) {
1369     Writer.AddDeclRef(OvI.getDecl(), Record);
1370     Record.push_back(OvI.getAccess());
1371   }
1372 
1373   Writer.AddDeclarationNameInfo(E->NameInfo, Record);
1374   Writer.AddNestedNameSpecifierLoc(E->getQualifierLoc(), Record);
1375 }
1376 
1377 void ASTStmtWriter::VisitUnresolvedMemberExpr(UnresolvedMemberExpr *E) {
1378   VisitOverloadExpr(E);
1379   Record.push_back(E->isArrow());
1380   Record.push_back(E->hasUnresolvedUsing());
1381   Writer.AddStmt(!E->isImplicitAccess() ? E->getBase() : 0);
1382   Writer.AddTypeRef(E->getBaseType(), Record);
1383   Writer.AddSourceLocation(E->getOperatorLoc(), Record);
1384   Code = serialization::EXPR_CXX_UNRESOLVED_MEMBER;
1385 }
1386 
1387 void ASTStmtWriter::VisitUnresolvedLookupExpr(UnresolvedLookupExpr *E) {
1388   VisitOverloadExpr(E);
1389   Record.push_back(E->requiresADL());
1390   Record.push_back(E->isOverloaded());
1391   Writer.AddDeclRef(E->getNamingClass(), Record);
1392   Code = serialization::EXPR_CXX_UNRESOLVED_LOOKUP;
1393 }
1394 
1395 void ASTStmtWriter::VisitUnaryTypeTraitExpr(UnaryTypeTraitExpr *E) {
1396   VisitExpr(E);
1397   Record.push_back(E->getTrait());
1398   Record.push_back(E->getValue());
1399   Writer.AddSourceRange(E->getSourceRange(), Record);
1400   Writer.AddTypeSourceInfo(E->getQueriedTypeSourceInfo(), Record);
1401   Code = serialization::EXPR_CXX_UNARY_TYPE_TRAIT;
1402 }
1403 
1404 void ASTStmtWriter::VisitBinaryTypeTraitExpr(BinaryTypeTraitExpr *E) {
1405   VisitExpr(E);
1406   Record.push_back(E->getTrait());
1407   Record.push_back(E->getValue());
1408   Writer.AddSourceRange(E->getSourceRange(), Record);
1409   Writer.AddTypeSourceInfo(E->getLhsTypeSourceInfo(), Record);
1410   Writer.AddTypeSourceInfo(E->getRhsTypeSourceInfo(), Record);
1411   Code = serialization::EXPR_BINARY_TYPE_TRAIT;
1412 }
1413 
1414 void ASTStmtWriter::VisitTypeTraitExpr(TypeTraitExpr *E) {
1415   VisitExpr(E);
1416   Record.push_back(E->TypeTraitExprBits.NumArgs);
1417   Record.push_back(E->TypeTraitExprBits.Kind); // FIXME: Stable encoding
1418   Record.push_back(E->TypeTraitExprBits.Value);
1419   for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
1420     Writer.AddTypeSourceInfo(E->getArg(I), Record);
1421   Code = serialization::EXPR_TYPE_TRAIT;
1422 }
1423 
1424 void ASTStmtWriter::VisitArrayTypeTraitExpr(ArrayTypeTraitExpr *E) {
1425   VisitExpr(E);
1426   Record.push_back(E->getTrait());
1427   Record.push_back(E->getValue());
1428   Writer.AddSourceRange(E->getSourceRange(), Record);
1429   Writer.AddTypeSourceInfo(E->getQueriedTypeSourceInfo(), Record);
1430   Code = serialization::EXPR_ARRAY_TYPE_TRAIT;
1431 }
1432 
1433 void ASTStmtWriter::VisitExpressionTraitExpr(ExpressionTraitExpr *E) {
1434   VisitExpr(E);
1435   Record.push_back(E->getTrait());
1436   Record.push_back(E->getValue());
1437   Writer.AddSourceRange(E->getSourceRange(), Record);
1438   Writer.AddStmt(E->getQueriedExpression());
1439   Code = serialization::EXPR_CXX_EXPRESSION_TRAIT;
1440 }
1441 
1442 void ASTStmtWriter::VisitCXXNoexceptExpr(CXXNoexceptExpr *E) {
1443   VisitExpr(E);
1444   Record.push_back(E->getValue());
1445   Writer.AddSourceRange(E->getSourceRange(), Record);
1446   Writer.AddStmt(E->getOperand());
1447   Code = serialization::EXPR_CXX_NOEXCEPT;
1448 }
1449 
1450 void ASTStmtWriter::VisitPackExpansionExpr(PackExpansionExpr *E) {
1451   VisitExpr(E);
1452   Writer.AddSourceLocation(E->getEllipsisLoc(), Record);
1453   Record.push_back(E->NumExpansions);
1454   Writer.AddStmt(E->getPattern());
1455   Code = serialization::EXPR_PACK_EXPANSION;
1456 }
1457 
1458 void ASTStmtWriter::VisitSizeOfPackExpr(SizeOfPackExpr *E) {
1459   VisitExpr(E);
1460   Writer.AddSourceLocation(E->OperatorLoc, Record);
1461   Writer.AddSourceLocation(E->PackLoc, Record);
1462   Writer.AddSourceLocation(E->RParenLoc, Record);
1463   Record.push_back(E->Length);
1464   Writer.AddDeclRef(E->Pack, Record);
1465   Code = serialization::EXPR_SIZEOF_PACK;
1466 }
1467 
1468 void ASTStmtWriter::VisitSubstNonTypeTemplateParmExpr(
1469                                               SubstNonTypeTemplateParmExpr *E) {
1470   VisitExpr(E);
1471   Writer.AddDeclRef(E->getParameter(), Record);
1472   Writer.AddSourceLocation(E->getNameLoc(), Record);
1473   Writer.AddStmt(E->getReplacement());
1474   Code = serialization::EXPR_SUBST_NON_TYPE_TEMPLATE_PARM;
1475 }
1476 
1477 void ASTStmtWriter::VisitSubstNonTypeTemplateParmPackExpr(
1478                                           SubstNonTypeTemplateParmPackExpr *E) {
1479   VisitExpr(E);
1480   Writer.AddDeclRef(E->getParameterPack(), Record);
1481   Writer.AddTemplateArgument(E->getArgumentPack(), Record);
1482   Writer.AddSourceLocation(E->getParameterPackLocation(), Record);
1483   Code = serialization::EXPR_SUBST_NON_TYPE_TEMPLATE_PARM_PACK;
1484 }
1485 
1486 void ASTStmtWriter::VisitFunctionParmPackExpr(FunctionParmPackExpr *E) {
1487   VisitExpr(E);
1488   Record.push_back(E->getNumExpansions());
1489   Writer.AddDeclRef(E->getParameterPack(), Record);
1490   Writer.AddSourceLocation(E->getParameterPackLocation(), Record);
1491   for (FunctionParmPackExpr::iterator I = E->begin(), End = E->end();
1492        I != End; ++I)
1493     Writer.AddDeclRef(*I, Record);
1494   Code = serialization::EXPR_FUNCTION_PARM_PACK;
1495 }
1496 
1497 void ASTStmtWriter::VisitMaterializeTemporaryExpr(MaterializeTemporaryExpr *E) {
1498   VisitExpr(E);
1499   Writer.AddStmt(E->Temporary);
1500   Code = serialization::EXPR_MATERIALIZE_TEMPORARY;
1501 }
1502 
1503 void ASTStmtWriter::VisitOpaqueValueExpr(OpaqueValueExpr *E) {
1504   VisitExpr(E);
1505   Writer.AddStmt(E->getSourceExpr());
1506   Writer.AddSourceLocation(E->getLocation(), Record);
1507   Code = serialization::EXPR_OPAQUE_VALUE;
1508 }
1509 
1510 //===----------------------------------------------------------------------===//
1511 // CUDA Expressions and Statements.
1512 //===----------------------------------------------------------------------===//
1513 
1514 void ASTStmtWriter::VisitCUDAKernelCallExpr(CUDAKernelCallExpr *E) {
1515   VisitCallExpr(E);
1516   Writer.AddStmt(E->getConfig());
1517   Code = serialization::EXPR_CUDA_KERNEL_CALL;
1518 }
1519 
1520 //===----------------------------------------------------------------------===//
1521 // OpenCL Expressions and Statements.
1522 //===----------------------------------------------------------------------===//
1523 void ASTStmtWriter::VisitAsTypeExpr(AsTypeExpr *E) {
1524   VisitExpr(E);
1525   Writer.AddSourceLocation(E->getBuiltinLoc(), Record);
1526   Writer.AddSourceLocation(E->getRParenLoc(), Record);
1527   Writer.AddStmt(E->getSrcExpr());
1528   Code = serialization::EXPR_ASTYPE;
1529 }
1530 
1531 //===----------------------------------------------------------------------===//
1532 // Microsoft Expressions and Statements.
1533 //===----------------------------------------------------------------------===//
1534 void ASTStmtWriter::VisitCXXUuidofExpr(CXXUuidofExpr *E) {
1535   VisitExpr(E);
1536   Writer.AddSourceRange(E->getSourceRange(), Record);
1537   if (E->isTypeOperand()) {
1538     Writer.AddTypeSourceInfo(E->getTypeOperandSourceInfo(), Record);
1539     Code = serialization::EXPR_CXX_UUIDOF_TYPE;
1540   } else {
1541     Writer.AddStmt(E->getExprOperand());
1542     Code = serialization::EXPR_CXX_UUIDOF_EXPR;
1543   }
1544 }
1545 
1546 void ASTStmtWriter::VisitSEHExceptStmt(SEHExceptStmt *S) {
1547   VisitStmt(S);
1548   Writer.AddSourceLocation(S->getExceptLoc(), Record);
1549   Writer.AddStmt(S->getFilterExpr());
1550   Writer.AddStmt(S->getBlock());
1551   Code = serialization::STMT_SEH_EXCEPT;
1552 }
1553 
1554 void ASTStmtWriter::VisitSEHFinallyStmt(SEHFinallyStmt *S) {
1555   VisitStmt(S);
1556   Writer.AddSourceLocation(S->getFinallyLoc(), Record);
1557   Writer.AddStmt(S->getBlock());
1558   Code = serialization::STMT_SEH_FINALLY;
1559 }
1560 
1561 void ASTStmtWriter::VisitSEHTryStmt(SEHTryStmt *S) {
1562   VisitStmt(S);
1563   Record.push_back(S->getIsCXXTry());
1564   Writer.AddSourceLocation(S->getTryLoc(), Record);
1565   Writer.AddStmt(S->getTryBlock());
1566   Writer.AddStmt(S->getHandler());
1567   Code = serialization::STMT_SEH_TRY;
1568 }
1569 
1570 //===----------------------------------------------------------------------===//
1571 // ASTWriter Implementation
1572 //===----------------------------------------------------------------------===//
1573 
1574 unsigned ASTWriter::RecordSwitchCaseID(SwitchCase *S) {
1575   assert(SwitchCaseIDs.find(S) == SwitchCaseIDs.end() &&
1576          "SwitchCase recorded twice");
1577   unsigned NextID = SwitchCaseIDs.size();
1578   SwitchCaseIDs[S] = NextID;
1579   return NextID;
1580 }
1581 
1582 unsigned ASTWriter::getSwitchCaseID(SwitchCase *S) {
1583   assert(SwitchCaseIDs.find(S) != SwitchCaseIDs.end() &&
1584          "SwitchCase hasn't been seen yet");
1585   return SwitchCaseIDs[S];
1586 }
1587 
1588 void ASTWriter::ClearSwitchCaseIDs() {
1589   SwitchCaseIDs.clear();
1590 }
1591 
1592 /// \brief Write the given substatement or subexpression to the
1593 /// bitstream.
1594 void ASTWriter::WriteSubStmt(Stmt *S,
1595                              llvm::DenseMap<Stmt *, uint64_t> &SubStmtEntries,
1596                              llvm::DenseSet<Stmt *> &ParentStmts) {
1597   RecordData Record;
1598   ASTStmtWriter Writer(*this, Record);
1599   ++NumStatements;
1600 
1601   if (!S) {
1602     Stream.EmitRecord(serialization::STMT_NULL_PTR, Record);
1603     return;
1604   }
1605 
1606   llvm::DenseMap<Stmt *, uint64_t>::iterator I = SubStmtEntries.find(S);
1607   if (I != SubStmtEntries.end()) {
1608     Record.push_back(I->second);
1609     Stream.EmitRecord(serialization::STMT_REF_PTR, Record);
1610     return;
1611   }
1612 
1613 #ifndef NDEBUG
1614   assert(!ParentStmts.count(S) && "There is a Stmt cycle!");
1615 
1616   struct ParentStmtInserterRAII {
1617     Stmt *S;
1618     llvm::DenseSet<Stmt *> &ParentStmts;
1619 
1620     ParentStmtInserterRAII(Stmt *S, llvm::DenseSet<Stmt *> &ParentStmts)
1621       : S(S), ParentStmts(ParentStmts) {
1622       ParentStmts.insert(S);
1623     }
1624     ~ParentStmtInserterRAII() {
1625       ParentStmts.erase(S);
1626     }
1627   };
1628 
1629   ParentStmtInserterRAII ParentStmtInserter(S, ParentStmts);
1630 #endif
1631 
1632   // Redirect ASTWriter::AddStmt to collect sub stmts.
1633   SmallVector<Stmt *, 16> SubStmts;
1634   CollectedStmts = &SubStmts;
1635 
1636   Writer.Code = serialization::STMT_NULL_PTR;
1637   Writer.AbbrevToUse = 0;
1638   Writer.Visit(S);
1639 
1640 #ifndef NDEBUG
1641   if (Writer.Code == serialization::STMT_NULL_PTR) {
1642     SourceManager &SrcMgr
1643       = DeclIDs.begin()->first->getASTContext().getSourceManager();
1644     S->dump(SrcMgr);
1645     llvm_unreachable("Unhandled sub statement writing AST file");
1646   }
1647 #endif
1648 
1649   // Revert ASTWriter::AddStmt.
1650   CollectedStmts = &StmtsToEmit;
1651 
1652   // Write the sub stmts in reverse order, last to first. When reading them back
1653   // we will read them in correct order by "pop"ing them from the Stmts stack.
1654   // This simplifies reading and allows to store a variable number of sub stmts
1655   // without knowing it in advance.
1656   while (!SubStmts.empty())
1657     WriteSubStmt(SubStmts.pop_back_val(), SubStmtEntries, ParentStmts);
1658 
1659   Stream.EmitRecord(Writer.Code, Record, Writer.AbbrevToUse);
1660 
1661   SubStmtEntries[S] = Stream.GetCurrentBitNo();
1662 }
1663 
1664 /// \brief Flush all of the statements that have been added to the
1665 /// queue via AddStmt().
1666 void ASTWriter::FlushStmts() {
1667   RecordData Record;
1668 
1669   // We expect to be the only consumer of the two temporary statement maps,
1670   // assert that they are empty.
1671   assert(SubStmtEntries.empty() && "unexpected entries in sub stmt map");
1672   assert(ParentStmts.empty() && "unexpected entries in parent stmt map");
1673 
1674   for (unsigned I = 0, N = StmtsToEmit.size(); I != N; ++I) {
1675     WriteSubStmt(StmtsToEmit[I], SubStmtEntries, ParentStmts);
1676 
1677     assert(N == StmtsToEmit.size() &&
1678            "Substatement written via AddStmt rather than WriteSubStmt!");
1679 
1680     // Note that we are at the end of a full expression. Any
1681     // expression records that follow this one are part of a different
1682     // expression.
1683     Stream.EmitRecord(serialization::STMT_STOP, Record);
1684 
1685     SubStmtEntries.clear();
1686     ParentStmts.clear();
1687   }
1688 
1689   StmtsToEmit.clear();
1690 }
1691