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   Writer.AddStmt(E->getSyntacticForm());
610   Writer.AddSourceLocation(E->getLBraceLoc(), Record);
611   Writer.AddSourceLocation(E->getRBraceLoc(), Record);
612   bool isArrayFiller = E->ArrayFillerOrUnionFieldInit.is<Expr*>();
613   Record.push_back(isArrayFiller);
614   if (isArrayFiller)
615     Writer.AddStmt(E->getArrayFiller());
616   else
617     Writer.AddDeclRef(E->getInitializedFieldInUnion(), Record);
618   Record.push_back(E->hadArrayRangeDesignator());
619   Record.push_back(E->initializesStdInitializerList());
620   Record.push_back(E->getNumInits());
621   if (isArrayFiller) {
622     // ArrayFiller may have filled "holes" due to designated initializer.
623     // Replace them by 0 to indicate that the filler goes in that place.
624     Expr *filler = E->getArrayFiller();
625     for (unsigned I = 0, N = E->getNumInits(); I != N; ++I)
626       Writer.AddStmt(E->getInit(I) != filler ? E->getInit(I) : 0);
627   } else {
628     for (unsigned I = 0, N = E->getNumInits(); I != N; ++I)
629       Writer.AddStmt(E->getInit(I));
630   }
631   Code = serialization::EXPR_INIT_LIST;
632 }
633 
634 void ASTStmtWriter::VisitDesignatedInitExpr(DesignatedInitExpr *E) {
635   VisitExpr(E);
636   Record.push_back(E->getNumSubExprs());
637   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
638     Writer.AddStmt(E->getSubExpr(I));
639   Writer.AddSourceLocation(E->getEqualOrColonLoc(), Record);
640   Record.push_back(E->usesGNUSyntax());
641   for (DesignatedInitExpr::designators_iterator D = E->designators_begin(),
642                                              DEnd = E->designators_end();
643        D != DEnd; ++D) {
644     if (D->isFieldDesignator()) {
645       if (FieldDecl *Field = D->getField()) {
646         Record.push_back(serialization::DESIG_FIELD_DECL);
647         Writer.AddDeclRef(Field, Record);
648       } else {
649         Record.push_back(serialization::DESIG_FIELD_NAME);
650         Writer.AddIdentifierRef(D->getFieldName(), Record);
651       }
652       Writer.AddSourceLocation(D->getDotLoc(), Record);
653       Writer.AddSourceLocation(D->getFieldLoc(), Record);
654     } else if (D->isArrayDesignator()) {
655       Record.push_back(serialization::DESIG_ARRAY);
656       Record.push_back(D->getFirstExprIndex());
657       Writer.AddSourceLocation(D->getLBracketLoc(), Record);
658       Writer.AddSourceLocation(D->getRBracketLoc(), Record);
659     } else {
660       assert(D->isArrayRangeDesignator() && "Unknown designator");
661       Record.push_back(serialization::DESIG_ARRAY_RANGE);
662       Record.push_back(D->getFirstExprIndex());
663       Writer.AddSourceLocation(D->getLBracketLoc(), Record);
664       Writer.AddSourceLocation(D->getEllipsisLoc(), Record);
665       Writer.AddSourceLocation(D->getRBracketLoc(), Record);
666     }
667   }
668   Code = serialization::EXPR_DESIGNATED_INIT;
669 }
670 
671 void ASTStmtWriter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) {
672   VisitExpr(E);
673   Code = serialization::EXPR_IMPLICIT_VALUE_INIT;
674 }
675 
676 void ASTStmtWriter::VisitVAArgExpr(VAArgExpr *E) {
677   VisitExpr(E);
678   Writer.AddStmt(E->getSubExpr());
679   Writer.AddTypeSourceInfo(E->getWrittenTypeInfo(), Record);
680   Writer.AddSourceLocation(E->getBuiltinLoc(), Record);
681   Writer.AddSourceLocation(E->getRParenLoc(), Record);
682   Code = serialization::EXPR_VA_ARG;
683 }
684 
685 void ASTStmtWriter::VisitAddrLabelExpr(AddrLabelExpr *E) {
686   VisitExpr(E);
687   Writer.AddSourceLocation(E->getAmpAmpLoc(), Record);
688   Writer.AddSourceLocation(E->getLabelLoc(), Record);
689   Writer.AddDeclRef(E->getLabel(), Record);
690   Code = serialization::EXPR_ADDR_LABEL;
691 }
692 
693 void ASTStmtWriter::VisitStmtExpr(StmtExpr *E) {
694   VisitExpr(E);
695   Writer.AddStmt(E->getSubStmt());
696   Writer.AddSourceLocation(E->getLParenLoc(), Record);
697   Writer.AddSourceLocation(E->getRParenLoc(), Record);
698   Code = serialization::EXPR_STMT;
699 }
700 
701 void ASTStmtWriter::VisitChooseExpr(ChooseExpr *E) {
702   VisitExpr(E);
703   Writer.AddStmt(E->getCond());
704   Writer.AddStmt(E->getLHS());
705   Writer.AddStmt(E->getRHS());
706   Writer.AddSourceLocation(E->getBuiltinLoc(), Record);
707   Writer.AddSourceLocation(E->getRParenLoc(), Record);
708   Code = serialization::EXPR_CHOOSE;
709 }
710 
711 void ASTStmtWriter::VisitGNUNullExpr(GNUNullExpr *E) {
712   VisitExpr(E);
713   Writer.AddSourceLocation(E->getTokenLocation(), Record);
714   Code = serialization::EXPR_GNU_NULL;
715 }
716 
717 void ASTStmtWriter::VisitShuffleVectorExpr(ShuffleVectorExpr *E) {
718   VisitExpr(E);
719   Record.push_back(E->getNumSubExprs());
720   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
721     Writer.AddStmt(E->getExpr(I));
722   Writer.AddSourceLocation(E->getBuiltinLoc(), Record);
723   Writer.AddSourceLocation(E->getRParenLoc(), Record);
724   Code = serialization::EXPR_SHUFFLE_VECTOR;
725 }
726 
727 void ASTStmtWriter::VisitBlockExpr(BlockExpr *E) {
728   VisitExpr(E);
729   Writer.AddDeclRef(E->getBlockDecl(), Record);
730   Code = serialization::EXPR_BLOCK;
731 }
732 
733 void ASTStmtWriter::VisitGenericSelectionExpr(GenericSelectionExpr *E) {
734   VisitExpr(E);
735   Record.push_back(E->getNumAssocs());
736 
737   Writer.AddStmt(E->getControllingExpr());
738   for (unsigned I = 0, N = E->getNumAssocs(); I != N; ++I) {
739     Writer.AddTypeSourceInfo(E->getAssocTypeSourceInfo(I), Record);
740     Writer.AddStmt(E->getAssocExpr(I));
741   }
742   Record.push_back(E->isResultDependent() ? -1U : E->getResultIndex());
743 
744   Writer.AddSourceLocation(E->getGenericLoc(), Record);
745   Writer.AddSourceLocation(E->getDefaultLoc(), Record);
746   Writer.AddSourceLocation(E->getRParenLoc(), Record);
747   Code = serialization::EXPR_GENERIC_SELECTION;
748 }
749 
750 void ASTStmtWriter::VisitPseudoObjectExpr(PseudoObjectExpr *E) {
751   VisitExpr(E);
752   Record.push_back(E->getNumSemanticExprs());
753 
754   // Push the result index.  Currently, this needs to exactly match
755   // the encoding used internally for ResultIndex.
756   unsigned result = E->getResultExprIndex();
757   result = (result == PseudoObjectExpr::NoResult ? 0 : result + 1);
758   Record.push_back(result);
759 
760   Writer.AddStmt(E->getSyntacticForm());
761   for (PseudoObjectExpr::semantics_iterator
762          i = E->semantics_begin(), e = E->semantics_end(); i != e; ++i) {
763     Writer.AddStmt(*i);
764   }
765   Code = serialization::EXPR_PSEUDO_OBJECT;
766 }
767 
768 void ASTStmtWriter::VisitAtomicExpr(AtomicExpr *E) {
769   VisitExpr(E);
770   Record.push_back(E->getOp());
771   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
772     Writer.AddStmt(E->getSubExprs()[I]);
773   Writer.AddSourceLocation(E->getBuiltinLoc(), Record);
774   Writer.AddSourceLocation(E->getRParenLoc(), Record);
775   Code = serialization::EXPR_ATOMIC;
776 }
777 
778 //===----------------------------------------------------------------------===//
779 // Objective-C Expressions and Statements.
780 //===----------------------------------------------------------------------===//
781 
782 void ASTStmtWriter::VisitObjCStringLiteral(ObjCStringLiteral *E) {
783   VisitExpr(E);
784   Writer.AddStmt(E->getString());
785   Writer.AddSourceLocation(E->getAtLoc(), Record);
786   Code = serialization::EXPR_OBJC_STRING_LITERAL;
787 }
788 
789 void ASTStmtWriter::VisitObjCBoxedExpr(ObjCBoxedExpr *E) {
790   VisitExpr(E);
791   Writer.AddStmt(E->getSubExpr());
792   Writer.AddDeclRef(E->getBoxingMethod(), Record);
793   Writer.AddSourceRange(E->getSourceRange(), Record);
794   Code = serialization::EXPR_OBJC_BOXED_EXPRESSION;
795 }
796 
797 void ASTStmtWriter::VisitObjCArrayLiteral(ObjCArrayLiteral *E) {
798   VisitExpr(E);
799   Record.push_back(E->getNumElements());
800   for (unsigned i = 0; i < E->getNumElements(); i++)
801     Writer.AddStmt(E->getElement(i));
802   Writer.AddDeclRef(E->getArrayWithObjectsMethod(), Record);
803   Writer.AddSourceRange(E->getSourceRange(), Record);
804   Code = serialization::EXPR_OBJC_ARRAY_LITERAL;
805 }
806 
807 void ASTStmtWriter::VisitObjCDictionaryLiteral(ObjCDictionaryLiteral *E) {
808   VisitExpr(E);
809   Record.push_back(E->getNumElements());
810   Record.push_back(E->HasPackExpansions);
811   for (unsigned i = 0; i < E->getNumElements(); i++) {
812     ObjCDictionaryElement Element = E->getKeyValueElement(i);
813     Writer.AddStmt(Element.Key);
814     Writer.AddStmt(Element.Value);
815     if (E->HasPackExpansions) {
816       Writer.AddSourceLocation(Element.EllipsisLoc, Record);
817       unsigned NumExpansions = 0;
818       if (Element.NumExpansions)
819         NumExpansions = *Element.NumExpansions + 1;
820       Record.push_back(NumExpansions);
821     }
822   }
823 
824   Writer.AddDeclRef(E->getDictWithObjectsMethod(), Record);
825   Writer.AddSourceRange(E->getSourceRange(), Record);
826   Code = serialization::EXPR_OBJC_DICTIONARY_LITERAL;
827 }
828 
829 void ASTStmtWriter::VisitObjCEncodeExpr(ObjCEncodeExpr *E) {
830   VisitExpr(E);
831   Writer.AddTypeSourceInfo(E->getEncodedTypeSourceInfo(), Record);
832   Writer.AddSourceLocation(E->getAtLoc(), Record);
833   Writer.AddSourceLocation(E->getRParenLoc(), Record);
834   Code = serialization::EXPR_OBJC_ENCODE;
835 }
836 
837 void ASTStmtWriter::VisitObjCSelectorExpr(ObjCSelectorExpr *E) {
838   VisitExpr(E);
839   Writer.AddSelectorRef(E->getSelector(), Record);
840   Writer.AddSourceLocation(E->getAtLoc(), Record);
841   Writer.AddSourceLocation(E->getRParenLoc(), Record);
842   Code = serialization::EXPR_OBJC_SELECTOR_EXPR;
843 }
844 
845 void ASTStmtWriter::VisitObjCProtocolExpr(ObjCProtocolExpr *E) {
846   VisitExpr(E);
847   Writer.AddDeclRef(E->getProtocol(), Record);
848   Writer.AddSourceLocation(E->getAtLoc(), Record);
849   Writer.AddSourceLocation(E->ProtoLoc, Record);
850   Writer.AddSourceLocation(E->getRParenLoc(), Record);
851   Code = serialization::EXPR_OBJC_PROTOCOL_EXPR;
852 }
853 
854 void ASTStmtWriter::VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) {
855   VisitExpr(E);
856   Writer.AddDeclRef(E->getDecl(), Record);
857   Writer.AddSourceLocation(E->getLocation(), Record);
858   Writer.AddStmt(E->getBase());
859   Record.push_back(E->isArrow());
860   Record.push_back(E->isFreeIvar());
861   Code = serialization::EXPR_OBJC_IVAR_REF_EXPR;
862 }
863 
864 void ASTStmtWriter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) {
865   VisitExpr(E);
866   Record.push_back(E->SetterAndMethodRefFlags.getInt());
867   Record.push_back(E->isImplicitProperty());
868   if (E->isImplicitProperty()) {
869     Writer.AddDeclRef(E->getImplicitPropertyGetter(), Record);
870     Writer.AddDeclRef(E->getImplicitPropertySetter(), Record);
871   } else {
872     Writer.AddDeclRef(E->getExplicitProperty(), Record);
873   }
874   Writer.AddSourceLocation(E->getLocation(), Record);
875   Writer.AddSourceLocation(E->getReceiverLocation(), Record);
876   if (E->isObjectReceiver()) {
877     Record.push_back(0);
878     Writer.AddStmt(E->getBase());
879   } else if (E->isSuperReceiver()) {
880     Record.push_back(1);
881     Writer.AddTypeRef(E->getSuperReceiverType(), Record);
882   } else {
883     Record.push_back(2);
884     Writer.AddDeclRef(E->getClassReceiver(), Record);
885   }
886 
887   Code = serialization::EXPR_OBJC_PROPERTY_REF_EXPR;
888 }
889 
890 void ASTStmtWriter::VisitObjCSubscriptRefExpr(ObjCSubscriptRefExpr *E) {
891   VisitExpr(E);
892   Writer.AddSourceLocation(E->getRBracket(), Record);
893   Writer.AddStmt(E->getBaseExpr());
894   Writer.AddStmt(E->getKeyExpr());
895   Writer.AddDeclRef(E->getAtIndexMethodDecl(), Record);
896   Writer.AddDeclRef(E->setAtIndexMethodDecl(), Record);
897 
898   Code = serialization::EXPR_OBJC_SUBSCRIPT_REF_EXPR;
899 }
900 
901 void ASTStmtWriter::VisitObjCMessageExpr(ObjCMessageExpr *E) {
902   VisitExpr(E);
903   Record.push_back(E->getNumArgs());
904   Record.push_back(E->getNumStoredSelLocs());
905   Record.push_back(E->SelLocsKind);
906   Record.push_back(E->isDelegateInitCall());
907   Record.push_back(E->IsImplicit);
908   Record.push_back((unsigned)E->getReceiverKind()); // FIXME: stable encoding
909   switch (E->getReceiverKind()) {
910   case ObjCMessageExpr::Instance:
911     Writer.AddStmt(E->getInstanceReceiver());
912     break;
913 
914   case ObjCMessageExpr::Class:
915     Writer.AddTypeSourceInfo(E->getClassReceiverTypeInfo(), Record);
916     break;
917 
918   case ObjCMessageExpr::SuperClass:
919   case ObjCMessageExpr::SuperInstance:
920     Writer.AddTypeRef(E->getSuperType(), Record);
921     Writer.AddSourceLocation(E->getSuperLoc(), Record);
922     break;
923   }
924 
925   if (E->getMethodDecl()) {
926     Record.push_back(1);
927     Writer.AddDeclRef(E->getMethodDecl(), Record);
928   } else {
929     Record.push_back(0);
930     Writer.AddSelectorRef(E->getSelector(), Record);
931   }
932 
933   Writer.AddSourceLocation(E->getLeftLoc(), Record);
934   Writer.AddSourceLocation(E->getRightLoc(), Record);
935 
936   for (CallExpr::arg_iterator Arg = E->arg_begin(), ArgEnd = E->arg_end();
937        Arg != ArgEnd; ++Arg)
938     Writer.AddStmt(*Arg);
939 
940   SourceLocation *Locs = E->getStoredSelLocs();
941   for (unsigned i = 0, e = E->getNumStoredSelLocs(); i != e; ++i)
942     Writer.AddSourceLocation(Locs[i], Record);
943 
944   Code = serialization::EXPR_OBJC_MESSAGE_EXPR;
945 }
946 
947 void ASTStmtWriter::VisitObjCForCollectionStmt(ObjCForCollectionStmt *S) {
948   VisitStmt(S);
949   Writer.AddStmt(S->getElement());
950   Writer.AddStmt(S->getCollection());
951   Writer.AddStmt(S->getBody());
952   Writer.AddSourceLocation(S->getForLoc(), Record);
953   Writer.AddSourceLocation(S->getRParenLoc(), Record);
954   Code = serialization::STMT_OBJC_FOR_COLLECTION;
955 }
956 
957 void ASTStmtWriter::VisitObjCAtCatchStmt(ObjCAtCatchStmt *S) {
958   Writer.AddStmt(S->getCatchBody());
959   Writer.AddDeclRef(S->getCatchParamDecl(), Record);
960   Writer.AddSourceLocation(S->getAtCatchLoc(), Record);
961   Writer.AddSourceLocation(S->getRParenLoc(), Record);
962   Code = serialization::STMT_OBJC_CATCH;
963 }
964 
965 void ASTStmtWriter::VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *S) {
966   Writer.AddStmt(S->getFinallyBody());
967   Writer.AddSourceLocation(S->getAtFinallyLoc(), Record);
968   Code = serialization::STMT_OBJC_FINALLY;
969 }
970 
971 void ASTStmtWriter::VisitObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S) {
972   Writer.AddStmt(S->getSubStmt());
973   Writer.AddSourceLocation(S->getAtLoc(), Record);
974   Code = serialization::STMT_OBJC_AUTORELEASE_POOL;
975 }
976 
977 void ASTStmtWriter::VisitObjCAtTryStmt(ObjCAtTryStmt *S) {
978   Record.push_back(S->getNumCatchStmts());
979   Record.push_back(S->getFinallyStmt() != 0);
980   Writer.AddStmt(S->getTryBody());
981   for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; ++I)
982     Writer.AddStmt(S->getCatchStmt(I));
983   if (S->getFinallyStmt())
984     Writer.AddStmt(S->getFinallyStmt());
985   Writer.AddSourceLocation(S->getAtTryLoc(), Record);
986   Code = serialization::STMT_OBJC_AT_TRY;
987 }
988 
989 void ASTStmtWriter::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
990   Writer.AddStmt(S->getSynchExpr());
991   Writer.AddStmt(S->getSynchBody());
992   Writer.AddSourceLocation(S->getAtSynchronizedLoc(), Record);
993   Code = serialization::STMT_OBJC_AT_SYNCHRONIZED;
994 }
995 
996 void ASTStmtWriter::VisitObjCAtThrowStmt(ObjCAtThrowStmt *S) {
997   Writer.AddStmt(S->getThrowExpr());
998   Writer.AddSourceLocation(S->getThrowLoc(), Record);
999   Code = serialization::STMT_OBJC_AT_THROW;
1000 }
1001 
1002 void ASTStmtWriter::VisitObjCBoolLiteralExpr(ObjCBoolLiteralExpr *E) {
1003   VisitExpr(E);
1004   Record.push_back(E->getValue());
1005   Writer.AddSourceLocation(E->getLocation(), Record);
1006   Code = serialization::EXPR_OBJC_BOOL_LITERAL;
1007 }
1008 
1009 //===----------------------------------------------------------------------===//
1010 // C++ Expressions and Statements.
1011 //===----------------------------------------------------------------------===//
1012 
1013 void ASTStmtWriter::VisitCXXCatchStmt(CXXCatchStmt *S) {
1014   VisitStmt(S);
1015   Writer.AddSourceLocation(S->getCatchLoc(), Record);
1016   Writer.AddDeclRef(S->getExceptionDecl(), Record);
1017   Writer.AddStmt(S->getHandlerBlock());
1018   Code = serialization::STMT_CXX_CATCH;
1019 }
1020 
1021 void ASTStmtWriter::VisitCXXTryStmt(CXXTryStmt *S) {
1022   VisitStmt(S);
1023   Record.push_back(S->getNumHandlers());
1024   Writer.AddSourceLocation(S->getTryLoc(), Record);
1025   Writer.AddStmt(S->getTryBlock());
1026   for (unsigned i = 0, e = S->getNumHandlers(); i != e; ++i)
1027     Writer.AddStmt(S->getHandler(i));
1028   Code = serialization::STMT_CXX_TRY;
1029 }
1030 
1031 void ASTStmtWriter::VisitCXXForRangeStmt(CXXForRangeStmt *S) {
1032   VisitStmt(S);
1033   Writer.AddSourceLocation(S->getForLoc(), Record);
1034   Writer.AddSourceLocation(S->getColonLoc(), Record);
1035   Writer.AddSourceLocation(S->getRParenLoc(), Record);
1036   Writer.AddStmt(S->getRangeStmt());
1037   Writer.AddStmt(S->getBeginEndStmt());
1038   Writer.AddStmt(S->getCond());
1039   Writer.AddStmt(S->getInc());
1040   Writer.AddStmt(S->getLoopVarStmt());
1041   Writer.AddStmt(S->getBody());
1042   Code = serialization::STMT_CXX_FOR_RANGE;
1043 }
1044 
1045 void ASTStmtWriter::VisitMSDependentExistsStmt(MSDependentExistsStmt *S) {
1046   VisitStmt(S);
1047   Writer.AddSourceLocation(S->getKeywordLoc(), Record);
1048   Record.push_back(S->isIfExists());
1049   Writer.AddNestedNameSpecifierLoc(S->getQualifierLoc(), Record);
1050   Writer.AddDeclarationNameInfo(S->getNameInfo(), Record);
1051   Writer.AddStmt(S->getSubStmt());
1052   Code = serialization::STMT_MS_DEPENDENT_EXISTS;
1053 }
1054 
1055 void ASTStmtWriter::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *E) {
1056   VisitCallExpr(E);
1057   Record.push_back(E->getOperator());
1058   Writer.AddSourceRange(E->Range, Record);
1059   Record.push_back(E->isFPContractable());
1060   Code = serialization::EXPR_CXX_OPERATOR_CALL;
1061 }
1062 
1063 void ASTStmtWriter::VisitCXXMemberCallExpr(CXXMemberCallExpr *E) {
1064   VisitCallExpr(E);
1065   Code = serialization::EXPR_CXX_MEMBER_CALL;
1066 }
1067 
1068 void ASTStmtWriter::VisitCXXConstructExpr(CXXConstructExpr *E) {
1069   VisitExpr(E);
1070   Record.push_back(E->getNumArgs());
1071   for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
1072     Writer.AddStmt(E->getArg(I));
1073   Writer.AddDeclRef(E->getConstructor(), Record);
1074   Writer.AddSourceLocation(E->getLocation(), Record);
1075   Record.push_back(E->isElidable());
1076   Record.push_back(E->hadMultipleCandidates());
1077   Record.push_back(E->requiresZeroInitialization());
1078   Record.push_back(E->getConstructionKind()); // FIXME: stable encoding
1079   Writer.AddSourceRange(E->getParenRange(), Record);
1080   Code = serialization::EXPR_CXX_CONSTRUCT;
1081 }
1082 
1083 void ASTStmtWriter::VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *E) {
1084   VisitCXXConstructExpr(E);
1085   Writer.AddTypeSourceInfo(E->getTypeSourceInfo(), Record);
1086   Code = serialization::EXPR_CXX_TEMPORARY_OBJECT;
1087 }
1088 
1089 void ASTStmtWriter::VisitLambdaExpr(LambdaExpr *E) {
1090   VisitExpr(E);
1091   Record.push_back(E->NumCaptures);
1092   unsigned NumArrayIndexVars = 0;
1093   if (E->HasArrayIndexVars)
1094     NumArrayIndexVars = E->getArrayIndexStarts()[E->NumCaptures];
1095   Record.push_back(NumArrayIndexVars);
1096   Writer.AddSourceRange(E->IntroducerRange, Record);
1097   Record.push_back(E->CaptureDefault); // FIXME: stable encoding
1098   Record.push_back(E->ExplicitParams);
1099   Record.push_back(E->ExplicitResultType);
1100   Writer.AddSourceLocation(E->ClosingBrace, Record);
1101 
1102   // Add capture initializers.
1103   for (LambdaExpr::capture_init_iterator C = E->capture_init_begin(),
1104                                       CEnd = E->capture_init_end();
1105        C != CEnd; ++C) {
1106     Writer.AddStmt(*C);
1107   }
1108 
1109   // Add array index variables, if any.
1110   if (NumArrayIndexVars) {
1111     Record.append(E->getArrayIndexStarts(),
1112                   E->getArrayIndexStarts() + E->NumCaptures + 1);
1113     VarDecl **ArrayIndexVars = E->getArrayIndexVars();
1114     for (unsigned I = 0; I != NumArrayIndexVars; ++I)
1115       Writer.AddDeclRef(ArrayIndexVars[I], Record);
1116   }
1117 
1118   Code = serialization::EXPR_LAMBDA;
1119 }
1120 
1121 void ASTStmtWriter::VisitCXXNamedCastExpr(CXXNamedCastExpr *E) {
1122   VisitExplicitCastExpr(E);
1123   Writer.AddSourceRange(SourceRange(E->getOperatorLoc(), E->getRParenLoc()),
1124                         Record);
1125 }
1126 
1127 void ASTStmtWriter::VisitCXXStaticCastExpr(CXXStaticCastExpr *E) {
1128   VisitCXXNamedCastExpr(E);
1129   Code = serialization::EXPR_CXX_STATIC_CAST;
1130 }
1131 
1132 void ASTStmtWriter::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *E) {
1133   VisitCXXNamedCastExpr(E);
1134   Code = serialization::EXPR_CXX_DYNAMIC_CAST;
1135 }
1136 
1137 void ASTStmtWriter::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *E) {
1138   VisitCXXNamedCastExpr(E);
1139   Code = serialization::EXPR_CXX_REINTERPRET_CAST;
1140 }
1141 
1142 void ASTStmtWriter::VisitCXXConstCastExpr(CXXConstCastExpr *E) {
1143   VisitCXXNamedCastExpr(E);
1144   Code = serialization::EXPR_CXX_CONST_CAST;
1145 }
1146 
1147 void ASTStmtWriter::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *E) {
1148   VisitExplicitCastExpr(E);
1149   Writer.AddSourceLocation(E->getTypeBeginLoc(), Record);
1150   Writer.AddSourceLocation(E->getRParenLoc(), Record);
1151   Code = serialization::EXPR_CXX_FUNCTIONAL_CAST;
1152 }
1153 
1154 void ASTStmtWriter::VisitUserDefinedLiteral(UserDefinedLiteral *E) {
1155   VisitCallExpr(E);
1156   Writer.AddSourceLocation(E->UDSuffixLoc, Record);
1157   Code = serialization::EXPR_USER_DEFINED_LITERAL;
1158 }
1159 
1160 void ASTStmtWriter::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *E) {
1161   VisitExpr(E);
1162   Record.push_back(E->getValue());
1163   Writer.AddSourceLocation(E->getLocation(), Record);
1164   Code = serialization::EXPR_CXX_BOOL_LITERAL;
1165 }
1166 
1167 void ASTStmtWriter::VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *E) {
1168   VisitExpr(E);
1169   Writer.AddSourceLocation(E->getLocation(), Record);
1170   Code = serialization::EXPR_CXX_NULL_PTR_LITERAL;
1171 }
1172 
1173 void ASTStmtWriter::VisitCXXTypeidExpr(CXXTypeidExpr *E) {
1174   VisitExpr(E);
1175   Writer.AddSourceRange(E->getSourceRange(), Record);
1176   if (E->isTypeOperand()) {
1177     Writer.AddTypeSourceInfo(E->getTypeOperandSourceInfo(), Record);
1178     Code = serialization::EXPR_CXX_TYPEID_TYPE;
1179   } else {
1180     Writer.AddStmt(E->getExprOperand());
1181     Code = serialization::EXPR_CXX_TYPEID_EXPR;
1182   }
1183 }
1184 
1185 void ASTStmtWriter::VisitCXXThisExpr(CXXThisExpr *E) {
1186   VisitExpr(E);
1187   Writer.AddSourceLocation(E->getLocation(), Record);
1188   Record.push_back(E->isImplicit());
1189   Code = serialization::EXPR_CXX_THIS;
1190 }
1191 
1192 void ASTStmtWriter::VisitCXXThrowExpr(CXXThrowExpr *E) {
1193   VisitExpr(E);
1194   Writer.AddSourceLocation(E->getThrowLoc(), Record);
1195   Writer.AddStmt(E->getSubExpr());
1196   Record.push_back(E->isThrownVariableInScope());
1197   Code = serialization::EXPR_CXX_THROW;
1198 }
1199 
1200 void ASTStmtWriter::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *E) {
1201   VisitExpr(E);
1202 
1203   bool HasOtherExprStored = E->Param.getInt();
1204   // Store these first, the reader reads them before creation.
1205   Record.push_back(HasOtherExprStored);
1206   if (HasOtherExprStored)
1207     Writer.AddStmt(E->getExpr());
1208   Writer.AddDeclRef(E->getParam(), Record);
1209   Writer.AddSourceLocation(E->getUsedLocation(), Record);
1210 
1211   Code = serialization::EXPR_CXX_DEFAULT_ARG;
1212 }
1213 
1214 void ASTStmtWriter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) {
1215   VisitExpr(E);
1216   Writer.AddCXXTemporary(E->getTemporary(), Record);
1217   Writer.AddStmt(E->getSubExpr());
1218   Code = serialization::EXPR_CXX_BIND_TEMPORARY;
1219 }
1220 
1221 void ASTStmtWriter::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) {
1222   VisitExpr(E);
1223   Writer.AddTypeSourceInfo(E->getTypeSourceInfo(), Record);
1224   Writer.AddSourceLocation(E->getRParenLoc(), Record);
1225   Code = serialization::EXPR_CXX_SCALAR_VALUE_INIT;
1226 }
1227 
1228 void ASTStmtWriter::VisitCXXNewExpr(CXXNewExpr *E) {
1229   VisitExpr(E);
1230   Record.push_back(E->isGlobalNew());
1231   Record.push_back(E->isArray());
1232   Record.push_back(E->doesUsualArrayDeleteWantSize());
1233   Record.push_back(E->getNumPlacementArgs());
1234   Record.push_back(E->StoredInitializationStyle);
1235   Writer.AddDeclRef(E->getOperatorNew(), Record);
1236   Writer.AddDeclRef(E->getOperatorDelete(), Record);
1237   Writer.AddTypeSourceInfo(E->getAllocatedTypeSourceInfo(), Record);
1238   Writer.AddSourceRange(E->getTypeIdParens(), Record);
1239   Writer.AddSourceLocation(E->getStartLoc(), Record);
1240   Writer.AddSourceRange(E->getDirectInitRange(), Record);
1241   for (CXXNewExpr::arg_iterator I = E->raw_arg_begin(), e = E->raw_arg_end();
1242        I != e; ++I)
1243     Writer.AddStmt(*I);
1244 
1245   Code = serialization::EXPR_CXX_NEW;
1246 }
1247 
1248 void ASTStmtWriter::VisitCXXDeleteExpr(CXXDeleteExpr *E) {
1249   VisitExpr(E);
1250   Record.push_back(E->isGlobalDelete());
1251   Record.push_back(E->isArrayForm());
1252   Record.push_back(E->isArrayFormAsWritten());
1253   Record.push_back(E->doesUsualArrayDeleteWantSize());
1254   Writer.AddDeclRef(E->getOperatorDelete(), Record);
1255   Writer.AddStmt(E->getArgument());
1256   Writer.AddSourceLocation(E->getSourceRange().getBegin(), Record);
1257 
1258   Code = serialization::EXPR_CXX_DELETE;
1259 }
1260 
1261 void ASTStmtWriter::VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E) {
1262   VisitExpr(E);
1263 
1264   Writer.AddStmt(E->getBase());
1265   Record.push_back(E->isArrow());
1266   Writer.AddSourceLocation(E->getOperatorLoc(), Record);
1267   Writer.AddNestedNameSpecifierLoc(E->getQualifierLoc(), Record);
1268   Writer.AddTypeSourceInfo(E->getScopeTypeInfo(), Record);
1269   Writer.AddSourceLocation(E->getColonColonLoc(), Record);
1270   Writer.AddSourceLocation(E->getTildeLoc(), Record);
1271 
1272   // PseudoDestructorTypeStorage.
1273   Writer.AddIdentifierRef(E->getDestroyedTypeIdentifier(), Record);
1274   if (E->getDestroyedTypeIdentifier())
1275     Writer.AddSourceLocation(E->getDestroyedTypeLoc(), Record);
1276   else
1277     Writer.AddTypeSourceInfo(E->getDestroyedTypeInfo(), Record);
1278 
1279   Code = serialization::EXPR_CXX_PSEUDO_DESTRUCTOR;
1280 }
1281 
1282 void ASTStmtWriter::VisitExprWithCleanups(ExprWithCleanups *E) {
1283   VisitExpr(E);
1284   Record.push_back(E->getNumObjects());
1285   for (unsigned i = 0, e = E->getNumObjects(); i != e; ++i)
1286     Writer.AddDeclRef(E->getObject(i), Record);
1287 
1288   Writer.AddStmt(E->getSubExpr());
1289   Code = serialization::EXPR_EXPR_WITH_CLEANUPS;
1290 }
1291 
1292 void
1293 ASTStmtWriter::VisitCXXDependentScopeMemberExpr(CXXDependentScopeMemberExpr *E){
1294   VisitExpr(E);
1295 
1296   // Don't emit anything here, HasTemplateKWAndArgsInfo must be
1297   // emitted first.
1298 
1299   Record.push_back(E->HasTemplateKWAndArgsInfo);
1300   if (E->HasTemplateKWAndArgsInfo) {
1301     const ASTTemplateKWAndArgsInfo &Args = *E->getTemplateKWAndArgsInfo();
1302     Record.push_back(Args.NumTemplateArgs);
1303     AddTemplateKWAndArgsInfo(Args);
1304   }
1305 
1306   if (!E->isImplicitAccess())
1307     Writer.AddStmt(E->getBase());
1308   else
1309     Writer.AddStmt(0);
1310   Writer.AddTypeRef(E->getBaseType(), Record);
1311   Record.push_back(E->isArrow());
1312   Writer.AddSourceLocation(E->getOperatorLoc(), Record);
1313   Writer.AddNestedNameSpecifierLoc(E->getQualifierLoc(), Record);
1314   Writer.AddDeclRef(E->getFirstQualifierFoundInScope(), Record);
1315   Writer.AddDeclarationNameInfo(E->MemberNameInfo, Record);
1316   Code = serialization::EXPR_CXX_DEPENDENT_SCOPE_MEMBER;
1317 }
1318 
1319 void
1320 ASTStmtWriter::VisitDependentScopeDeclRefExpr(DependentScopeDeclRefExpr *E) {
1321   VisitExpr(E);
1322 
1323   // Don't emit anything here, HasTemplateKWAndArgsInfo must be
1324   // emitted first.
1325 
1326   Record.push_back(E->HasTemplateKWAndArgsInfo);
1327   if (E->HasTemplateKWAndArgsInfo) {
1328     const ASTTemplateKWAndArgsInfo &Args = *E->getTemplateKWAndArgsInfo();
1329     Record.push_back(Args.NumTemplateArgs);
1330     AddTemplateKWAndArgsInfo(Args);
1331   }
1332 
1333   Writer.AddNestedNameSpecifierLoc(E->getQualifierLoc(), Record);
1334   Writer.AddDeclarationNameInfo(E->NameInfo, Record);
1335   Code = serialization::EXPR_CXX_DEPENDENT_SCOPE_DECL_REF;
1336 }
1337 
1338 void
1339 ASTStmtWriter::VisitCXXUnresolvedConstructExpr(CXXUnresolvedConstructExpr *E) {
1340   VisitExpr(E);
1341   Record.push_back(E->arg_size());
1342   for (CXXUnresolvedConstructExpr::arg_iterator
1343          ArgI = E->arg_begin(), ArgE = E->arg_end(); ArgI != ArgE; ++ArgI)
1344     Writer.AddStmt(*ArgI);
1345   Writer.AddTypeSourceInfo(E->getTypeSourceInfo(), Record);
1346   Writer.AddSourceLocation(E->getLParenLoc(), Record);
1347   Writer.AddSourceLocation(E->getRParenLoc(), Record);
1348   Code = serialization::EXPR_CXX_UNRESOLVED_CONSTRUCT;
1349 }
1350 
1351 void ASTStmtWriter::VisitOverloadExpr(OverloadExpr *E) {
1352   VisitExpr(E);
1353 
1354   // Don't emit anything here, HasTemplateKWAndArgsInfo must be
1355   // emitted first.
1356 
1357   Record.push_back(E->HasTemplateKWAndArgsInfo);
1358   if (E->HasTemplateKWAndArgsInfo) {
1359     const ASTTemplateKWAndArgsInfo &Args = *E->getTemplateKWAndArgsInfo();
1360     Record.push_back(Args.NumTemplateArgs);
1361     AddTemplateKWAndArgsInfo(Args);
1362   }
1363 
1364   Record.push_back(E->getNumDecls());
1365   for (OverloadExpr::decls_iterator
1366          OvI = E->decls_begin(), OvE = E->decls_end(); OvI != OvE; ++OvI) {
1367     Writer.AddDeclRef(OvI.getDecl(), Record);
1368     Record.push_back(OvI.getAccess());
1369   }
1370 
1371   Writer.AddDeclarationNameInfo(E->NameInfo, Record);
1372   Writer.AddNestedNameSpecifierLoc(E->getQualifierLoc(), Record);
1373 }
1374 
1375 void ASTStmtWriter::VisitUnresolvedMemberExpr(UnresolvedMemberExpr *E) {
1376   VisitOverloadExpr(E);
1377   Record.push_back(E->isArrow());
1378   Record.push_back(E->hasUnresolvedUsing());
1379   Writer.AddStmt(!E->isImplicitAccess() ? E->getBase() : 0);
1380   Writer.AddTypeRef(E->getBaseType(), Record);
1381   Writer.AddSourceLocation(E->getOperatorLoc(), Record);
1382   Code = serialization::EXPR_CXX_UNRESOLVED_MEMBER;
1383 }
1384 
1385 void ASTStmtWriter::VisitUnresolvedLookupExpr(UnresolvedLookupExpr *E) {
1386   VisitOverloadExpr(E);
1387   Record.push_back(E->requiresADL());
1388   Record.push_back(E->isOverloaded());
1389   Writer.AddDeclRef(E->getNamingClass(), Record);
1390   Code = serialization::EXPR_CXX_UNRESOLVED_LOOKUP;
1391 }
1392 
1393 void ASTStmtWriter::VisitUnaryTypeTraitExpr(UnaryTypeTraitExpr *E) {
1394   VisitExpr(E);
1395   Record.push_back(E->getTrait());
1396   Record.push_back(E->getValue());
1397   Writer.AddSourceRange(E->getSourceRange(), Record);
1398   Writer.AddTypeSourceInfo(E->getQueriedTypeSourceInfo(), Record);
1399   Code = serialization::EXPR_CXX_UNARY_TYPE_TRAIT;
1400 }
1401 
1402 void ASTStmtWriter::VisitBinaryTypeTraitExpr(BinaryTypeTraitExpr *E) {
1403   VisitExpr(E);
1404   Record.push_back(E->getTrait());
1405   Record.push_back(E->getValue());
1406   Writer.AddSourceRange(E->getSourceRange(), Record);
1407   Writer.AddTypeSourceInfo(E->getLhsTypeSourceInfo(), Record);
1408   Writer.AddTypeSourceInfo(E->getRhsTypeSourceInfo(), Record);
1409   Code = serialization::EXPR_BINARY_TYPE_TRAIT;
1410 }
1411 
1412 void ASTStmtWriter::VisitTypeTraitExpr(TypeTraitExpr *E) {
1413   VisitExpr(E);
1414   Record.push_back(E->TypeTraitExprBits.NumArgs);
1415   Record.push_back(E->TypeTraitExprBits.Kind); // FIXME: Stable encoding
1416   Record.push_back(E->TypeTraitExprBits.Value);
1417   for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
1418     Writer.AddTypeSourceInfo(E->getArg(I), Record);
1419   Code = serialization::EXPR_TYPE_TRAIT;
1420 }
1421 
1422 void ASTStmtWriter::VisitArrayTypeTraitExpr(ArrayTypeTraitExpr *E) {
1423   VisitExpr(E);
1424   Record.push_back(E->getTrait());
1425   Record.push_back(E->getValue());
1426   Writer.AddSourceRange(E->getSourceRange(), Record);
1427   Writer.AddTypeSourceInfo(E->getQueriedTypeSourceInfo(), Record);
1428   Code = serialization::EXPR_ARRAY_TYPE_TRAIT;
1429 }
1430 
1431 void ASTStmtWriter::VisitExpressionTraitExpr(ExpressionTraitExpr *E) {
1432   VisitExpr(E);
1433   Record.push_back(E->getTrait());
1434   Record.push_back(E->getValue());
1435   Writer.AddSourceRange(E->getSourceRange(), Record);
1436   Writer.AddStmt(E->getQueriedExpression());
1437   Code = serialization::EXPR_CXX_EXPRESSION_TRAIT;
1438 }
1439 
1440 void ASTStmtWriter::VisitCXXNoexceptExpr(CXXNoexceptExpr *E) {
1441   VisitExpr(E);
1442   Record.push_back(E->getValue());
1443   Writer.AddSourceRange(E->getSourceRange(), Record);
1444   Writer.AddStmt(E->getOperand());
1445   Code = serialization::EXPR_CXX_NOEXCEPT;
1446 }
1447 
1448 void ASTStmtWriter::VisitPackExpansionExpr(PackExpansionExpr *E) {
1449   VisitExpr(E);
1450   Writer.AddSourceLocation(E->getEllipsisLoc(), Record);
1451   Record.push_back(E->NumExpansions);
1452   Writer.AddStmt(E->getPattern());
1453   Code = serialization::EXPR_PACK_EXPANSION;
1454 }
1455 
1456 void ASTStmtWriter::VisitSizeOfPackExpr(SizeOfPackExpr *E) {
1457   VisitExpr(E);
1458   Writer.AddSourceLocation(E->OperatorLoc, Record);
1459   Writer.AddSourceLocation(E->PackLoc, Record);
1460   Writer.AddSourceLocation(E->RParenLoc, Record);
1461   Record.push_back(E->Length);
1462   Writer.AddDeclRef(E->Pack, Record);
1463   Code = serialization::EXPR_SIZEOF_PACK;
1464 }
1465 
1466 void ASTStmtWriter::VisitSubstNonTypeTemplateParmExpr(
1467                                               SubstNonTypeTemplateParmExpr *E) {
1468   VisitExpr(E);
1469   Writer.AddDeclRef(E->getParameter(), Record);
1470   Writer.AddSourceLocation(E->getNameLoc(), Record);
1471   Writer.AddStmt(E->getReplacement());
1472   Code = serialization::EXPR_SUBST_NON_TYPE_TEMPLATE_PARM;
1473 }
1474 
1475 void ASTStmtWriter::VisitSubstNonTypeTemplateParmPackExpr(
1476                                           SubstNonTypeTemplateParmPackExpr *E) {
1477   VisitExpr(E);
1478   Writer.AddDeclRef(E->getParameterPack(), Record);
1479   Writer.AddTemplateArgument(E->getArgumentPack(), Record);
1480   Writer.AddSourceLocation(E->getParameterPackLocation(), Record);
1481   Code = serialization::EXPR_SUBST_NON_TYPE_TEMPLATE_PARM_PACK;
1482 }
1483 
1484 void ASTStmtWriter::VisitFunctionParmPackExpr(FunctionParmPackExpr *E) {
1485   VisitExpr(E);
1486   Record.push_back(E->getNumExpansions());
1487   Writer.AddDeclRef(E->getParameterPack(), Record);
1488   Writer.AddSourceLocation(E->getParameterPackLocation(), Record);
1489   for (FunctionParmPackExpr::iterator I = E->begin(), End = E->end();
1490        I != End; ++I)
1491     Writer.AddDeclRef(*I, Record);
1492   Code = serialization::EXPR_FUNCTION_PARM_PACK;
1493 }
1494 
1495 void ASTStmtWriter::VisitMaterializeTemporaryExpr(MaterializeTemporaryExpr *E) {
1496   VisitExpr(E);
1497   Writer.AddStmt(E->Temporary);
1498   Code = serialization::EXPR_MATERIALIZE_TEMPORARY;
1499 }
1500 
1501 void ASTStmtWriter::VisitOpaqueValueExpr(OpaqueValueExpr *E) {
1502   VisitExpr(E);
1503   Writer.AddStmt(E->getSourceExpr());
1504   Writer.AddSourceLocation(E->getLocation(), Record);
1505   Code = serialization::EXPR_OPAQUE_VALUE;
1506 }
1507 
1508 //===----------------------------------------------------------------------===//
1509 // CUDA Expressions and Statements.
1510 //===----------------------------------------------------------------------===//
1511 
1512 void ASTStmtWriter::VisitCUDAKernelCallExpr(CUDAKernelCallExpr *E) {
1513   VisitCallExpr(E);
1514   Writer.AddStmt(E->getConfig());
1515   Code = serialization::EXPR_CUDA_KERNEL_CALL;
1516 }
1517 
1518 //===----------------------------------------------------------------------===//
1519 // OpenCL Expressions and Statements.
1520 //===----------------------------------------------------------------------===//
1521 void ASTStmtWriter::VisitAsTypeExpr(AsTypeExpr *E) {
1522   VisitExpr(E);
1523   Writer.AddSourceLocation(E->getBuiltinLoc(), Record);
1524   Writer.AddSourceLocation(E->getRParenLoc(), Record);
1525   Writer.AddStmt(E->getSrcExpr());
1526   Code = serialization::EXPR_ASTYPE;
1527 }
1528 
1529 //===----------------------------------------------------------------------===//
1530 // Microsoft Expressions and Statements.
1531 //===----------------------------------------------------------------------===//
1532 void ASTStmtWriter::VisitCXXUuidofExpr(CXXUuidofExpr *E) {
1533   VisitExpr(E);
1534   Writer.AddSourceRange(E->getSourceRange(), Record);
1535   if (E->isTypeOperand()) {
1536     Writer.AddTypeSourceInfo(E->getTypeOperandSourceInfo(), Record);
1537     Code = serialization::EXPR_CXX_UUIDOF_TYPE;
1538   } else {
1539     Writer.AddStmt(E->getExprOperand());
1540     Code = serialization::EXPR_CXX_UUIDOF_EXPR;
1541   }
1542 }
1543 
1544 void ASTStmtWriter::VisitSEHExceptStmt(SEHExceptStmt *S) {
1545   VisitStmt(S);
1546   Writer.AddSourceLocation(S->getExceptLoc(), Record);
1547   Writer.AddStmt(S->getFilterExpr());
1548   Writer.AddStmt(S->getBlock());
1549   Code = serialization::STMT_SEH_EXCEPT;
1550 }
1551 
1552 void ASTStmtWriter::VisitSEHFinallyStmt(SEHFinallyStmt *S) {
1553   VisitStmt(S);
1554   Writer.AddSourceLocation(S->getFinallyLoc(), Record);
1555   Writer.AddStmt(S->getBlock());
1556   Code = serialization::STMT_SEH_FINALLY;
1557 }
1558 
1559 void ASTStmtWriter::VisitSEHTryStmt(SEHTryStmt *S) {
1560   VisitStmt(S);
1561   Record.push_back(S->getIsCXXTry());
1562   Writer.AddSourceLocation(S->getTryLoc(), Record);
1563   Writer.AddStmt(S->getTryBlock());
1564   Writer.AddStmt(S->getHandler());
1565   Code = serialization::STMT_SEH_TRY;
1566 }
1567 
1568 //===----------------------------------------------------------------------===//
1569 // ASTWriter Implementation
1570 //===----------------------------------------------------------------------===//
1571 
1572 unsigned ASTWriter::RecordSwitchCaseID(SwitchCase *S) {
1573   assert(SwitchCaseIDs.find(S) == SwitchCaseIDs.end() &&
1574          "SwitchCase recorded twice");
1575   unsigned NextID = SwitchCaseIDs.size();
1576   SwitchCaseIDs[S] = NextID;
1577   return NextID;
1578 }
1579 
1580 unsigned ASTWriter::getSwitchCaseID(SwitchCase *S) {
1581   assert(SwitchCaseIDs.find(S) != SwitchCaseIDs.end() &&
1582          "SwitchCase hasn't been seen yet");
1583   return SwitchCaseIDs[S];
1584 }
1585 
1586 void ASTWriter::ClearSwitchCaseIDs() {
1587   SwitchCaseIDs.clear();
1588 }
1589 
1590 /// \brief Write the given substatement or subexpression to the
1591 /// bitstream.
1592 void ASTWriter::WriteSubStmt(Stmt *S,
1593                              llvm::DenseMap<Stmt *, uint64_t> &SubStmtEntries,
1594                              llvm::DenseSet<Stmt *> &ParentStmts) {
1595   RecordData Record;
1596   ASTStmtWriter Writer(*this, Record);
1597   ++NumStatements;
1598 
1599   if (!S) {
1600     Stream.EmitRecord(serialization::STMT_NULL_PTR, Record);
1601     return;
1602   }
1603 
1604   llvm::DenseMap<Stmt *, uint64_t>::iterator I = SubStmtEntries.find(S);
1605   if (I != SubStmtEntries.end()) {
1606     Record.push_back(I->second);
1607     Stream.EmitRecord(serialization::STMT_REF_PTR, Record);
1608     return;
1609   }
1610 
1611 #ifndef NDEBUG
1612   assert(!ParentStmts.count(S) && "There is a Stmt cycle!");
1613 
1614   struct ParentStmtInserterRAII {
1615     Stmt *S;
1616     llvm::DenseSet<Stmt *> &ParentStmts;
1617 
1618     ParentStmtInserterRAII(Stmt *S, llvm::DenseSet<Stmt *> &ParentStmts)
1619       : S(S), ParentStmts(ParentStmts) {
1620       ParentStmts.insert(S);
1621     }
1622     ~ParentStmtInserterRAII() {
1623       ParentStmts.erase(S);
1624     }
1625   };
1626 
1627   ParentStmtInserterRAII ParentStmtInserter(S, ParentStmts);
1628 #endif
1629 
1630   // Redirect ASTWriter::AddStmt to collect sub stmts.
1631   SmallVector<Stmt *, 16> SubStmts;
1632   CollectedStmts = &SubStmts;
1633 
1634   Writer.Code = serialization::STMT_NULL_PTR;
1635   Writer.AbbrevToUse = 0;
1636   Writer.Visit(S);
1637 
1638 #ifndef NDEBUG
1639   if (Writer.Code == serialization::STMT_NULL_PTR) {
1640     SourceManager &SrcMgr
1641       = DeclIDs.begin()->first->getASTContext().getSourceManager();
1642     S->dump(SrcMgr);
1643     llvm_unreachable("Unhandled sub statement writing AST file");
1644   }
1645 #endif
1646 
1647   // Revert ASTWriter::AddStmt.
1648   CollectedStmts = &StmtsToEmit;
1649 
1650   // Write the sub stmts in reverse order, last to first. When reading them back
1651   // we will read them in correct order by "pop"ing them from the Stmts stack.
1652   // This simplifies reading and allows to store a variable number of sub stmts
1653   // without knowing it in advance.
1654   while (!SubStmts.empty())
1655     WriteSubStmt(SubStmts.pop_back_val(), SubStmtEntries, ParentStmts);
1656 
1657   Stream.EmitRecord(Writer.Code, Record, Writer.AbbrevToUse);
1658 
1659   SubStmtEntries[S] = Stream.GetCurrentBitNo();
1660 }
1661 
1662 /// \brief Flush all of the statements that have been added to the
1663 /// queue via AddStmt().
1664 void ASTWriter::FlushStmts() {
1665   RecordData Record;
1666 
1667   // We expect to be the only consumer of the two temporary statement maps,
1668   // assert that they are empty.
1669   assert(SubStmtEntries.empty() && "unexpected entries in sub stmt map");
1670   assert(ParentStmts.empty() && "unexpected entries in parent stmt map");
1671 
1672   for (unsigned I = 0, N = StmtsToEmit.size(); I != N; ++I) {
1673     WriteSubStmt(StmtsToEmit[I], SubStmtEntries, ParentStmts);
1674 
1675     assert(N == StmtsToEmit.size() &&
1676            "Substatement written via AddStmt rather than WriteSubStmt!");
1677 
1678     // Note that we are at the end of a full expression. Any
1679     // expression records that follow this one are part of a different
1680     // expression.
1681     Stream.EmitRecord(serialization::STMT_STOP, Record);
1682 
1683     SubStmtEntries.clear();
1684     ParentStmts.clear();
1685   }
1686 
1687   StmtsToEmit.clear();
1688 }
1689