clang/lib/Serialization/ASTWriterStmt.cpp

   1 //===--- ASTWriterStmt.cpp - Statement and Expression Serialization -------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 ///
   9 /// \file
  10 /// Implements serialization for Statements and Expressions.
  11 ///
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "clang/AST/ASTConcept.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/ExprOpenMP.h"
  20 #include "clang/AST/StmtVisitor.h"
  21 #include "clang/Lex/Token.h"
  22 #include "clang/Sema/DeclSpec.h"
  23 #include "clang/Serialization/ASTRecordWriter.h"
  24 #include "llvm/Bitstream/BitstreamWriter.h"
  25 using namespace clang;
  26
  27 //===----------------------------------------------------------------------===//
  28 // Statement/expression serialization
  29 //===----------------------------------------------------------------------===//
  30
  31 namespace clang {
  32
  33   class ASTStmtWriter : public StmtVisitor<ASTStmtWriter, void> {
  34     ASTWriter &Writer;
  35     ASTRecordWriter Record;
  36
  37     serialization::StmtCode Code;
  38     unsigned AbbrevToUse;
  39
  40   public:
  41     ASTStmtWriter(ASTWriter &Writer, ASTWriter::RecordData &Record)
  42         : Writer(Writer), Record(Writer, Record),
  43           Code(serialization::STMT_NULL_PTR), AbbrevToUse(0) {}
  44
  45     ASTStmtWriter(const ASTStmtWriter&) = delete;
  46     ASTStmtWriter &operator=(const ASTStmtWriter &) = delete;
  47
  48     uint64_t Emit() {
  49       assert(Code != serialization::STMT_NULL_PTR &&
  50              "unhandled sub-statement writing AST file");
  51       return Record.EmitStmt(Code, AbbrevToUse);
  52     }
  53
  54     void AddTemplateKWAndArgsInfo(const ASTTemplateKWAndArgsInfo &ArgInfo,
  55                                   const TemplateArgumentLoc *Args);
  56
  57     void VisitStmt(Stmt *S);
  58 #define STMT(Type, Base) \
  59     void Visit##Type(Type *);
  60 #include "clang/AST/StmtNodes.inc"
  61   };
  62 }
  63
  64 void ASTStmtWriter::AddTemplateKWAndArgsInfo(
  65     const ASTTemplateKWAndArgsInfo &ArgInfo, const TemplateArgumentLoc *Args) {
  66   Record.AddSourceLocation(ArgInfo.TemplateKWLoc);
  67   Record.AddSourceLocation(ArgInfo.LAngleLoc);
  68   Record.AddSourceLocation(ArgInfo.RAngleLoc);
  69   for (unsigned i = 0; i != ArgInfo.NumTemplateArgs; ++i)
  70     Record.AddTemplateArgumentLoc(Args[i]);
  71 }
  72
  73 void ASTStmtWriter::VisitStmt(Stmt *S) {
  74 }
  75
  76 void ASTStmtWriter::VisitNullStmt(NullStmt *S) {
  77   VisitStmt(S);
  78   Record.AddSourceLocation(S->getSemiLoc());
  79   Record.push_back(S->NullStmtBits.HasLeadingEmptyMacro);
  80   Code = serialization::STMT_NULL;
  81 }
  82
  83 void ASTStmtWriter::VisitCompoundStmt(CompoundStmt *S) {
  84   VisitStmt(S);
  85   Record.push_back(S->size());
  86   Record.push_back(S->hasStoredFPFeatures());
  87   for (auto *CS : S->body())
  88     Record.AddStmt(CS);
  89   if (S->hasStoredFPFeatures())
  90     Record.push_back(S->getStoredFPFeatures().getAsOpaqueInt());
  91   Record.AddSourceLocation(S->getLBracLoc());
  92   Record.AddSourceLocation(S->getRBracLoc());
  93   Code = serialization::STMT_COMPOUND;
  94 }
  95
  96 void ASTStmtWriter::VisitSwitchCase(SwitchCase *S) {
  97   VisitStmt(S);
  98   Record.push_back(Writer.getSwitchCaseID(S));
  99   Record.AddSourceLocation(S->getKeywordLoc());
 100   Record.AddSourceLocation(S->getColonLoc());
 101 }
 102
 103 void ASTStmtWriter::VisitCaseStmt(CaseStmt *S) {
 104   VisitSwitchCase(S);
 105   Record.push_back(S->caseStmtIsGNURange());
 106   Record.AddStmt(S->getLHS());
 107   Record.AddStmt(S->getSubStmt());
 108   if (S->caseStmtIsGNURange()) {
 109     Record.AddStmt(S->getRHS());
 110     Record.AddSourceLocation(S->getEllipsisLoc());
 111   }
 112   Code = serialization::STMT_CASE;
 113 }
 114
 115 void ASTStmtWriter::VisitDefaultStmt(DefaultStmt *S) {
 116   VisitSwitchCase(S);
 117   Record.AddStmt(S->getSubStmt());
 118   Code = serialization::STMT_DEFAULT;
 119 }
 120
 121 void ASTStmtWriter::VisitLabelStmt(LabelStmt *S) {
 122   VisitStmt(S);
 123   Record.push_back(S->isSideEntry());
 124   Record.AddDeclRef(S->getDecl());
 125   Record.AddStmt(S->getSubStmt());
 126   Record.AddSourceLocation(S->getIdentLoc());
 127   Code = serialization::STMT_LABEL;
 128 }
 129
 130 void ASTStmtWriter::VisitAttributedStmt(AttributedStmt *S) {
 131   VisitStmt(S);
 132   Record.push_back(S->getAttrs().size());
 133   Record.AddAttributes(S->getAttrs());
 134   Record.AddStmt(S->getSubStmt());
 135   Record.AddSourceLocation(S->getAttrLoc());
 136   Code = serialization::STMT_ATTRIBUTED;
 137 }
 138
 139 void ASTStmtWriter::VisitIfStmt(IfStmt *S) {
 140   VisitStmt(S);
 141
 142   bool HasElse = S->getElse() != nullptr;
 143   bool HasVar = S->getConditionVariableDeclStmt() != nullptr;
 144   bool HasInit = S->getInit() != nullptr;
 145
 146   Record.push_back(HasElse);
 147   Record.push_back(HasVar);
 148   Record.push_back(HasInit);
 149   Record.push_back(static_cast<uint64_t>(S->getStatementKind()));
 150   Record.AddStmt(S->getCond());
 151   Record.AddStmt(S->getThen());
 152   if (HasElse)
 153     Record.AddStmt(S->getElse());
 154   if (HasVar)
 155     Record.AddStmt(S->getConditionVariableDeclStmt());
 156   if (HasInit)
 157     Record.AddStmt(S->getInit());
 158
 159   Record.AddSourceLocation(S->getIfLoc());
 160   Record.AddSourceLocation(S->getLParenLoc());
 161   Record.AddSourceLocation(S->getRParenLoc());
 162   if (HasElse)
 163     Record.AddSourceLocation(S->getElseLoc());
 164
 165   Code = serialization::STMT_IF;
 166 }
 167
 168 void ASTStmtWriter::VisitSwitchStmt(SwitchStmt *S) {
 169   VisitStmt(S);
 170
 171   bool HasInit = S->getInit() != nullptr;
 172   bool HasVar = S->getConditionVariableDeclStmt() != nullptr;
 173   Record.push_back(HasInit);
 174   Record.push_back(HasVar);
 175   Record.push_back(S->isAllEnumCasesCovered());
 176
 177   Record.AddStmt(S->getCond());
 178   Record.AddStmt(S->getBody());
 179   if (HasInit)
 180     Record.AddStmt(S->getInit());
 181   if (HasVar)
 182     Record.AddStmt(S->getConditionVariableDeclStmt());
 183
 184   Record.AddSourceLocation(S->getSwitchLoc());
 185   Record.AddSourceLocation(S->getLParenLoc());
 186   Record.AddSourceLocation(S->getRParenLoc());
 187
 188   for (SwitchCase *SC = S->getSwitchCaseList(); SC;
 189        SC = SC->getNextSwitchCase())
 190     Record.push_back(Writer.RecordSwitchCaseID(SC));
 191   Code = serialization::STMT_SWITCH;
 192 }
 193
 194 void ASTStmtWriter::VisitWhileStmt(WhileStmt *S) {
 195   VisitStmt(S);
 196
 197   bool HasVar = S->getConditionVariableDeclStmt() != nullptr;
 198   Record.push_back(HasVar);
 199
 200   Record.AddStmt(S->getCond());
 201   Record.AddStmt(S->getBody());
 202   if (HasVar)
 203     Record.AddStmt(S->getConditionVariableDeclStmt());
 204
 205   Record.AddSourceLocation(S->getWhileLoc());
 206   Record.AddSourceLocation(S->getLParenLoc());
 207   Record.AddSourceLocation(S->getRParenLoc());
 208   Code = serialization::STMT_WHILE;
 209 }
 210
 211 void ASTStmtWriter::VisitDoStmt(DoStmt *S) {
 212   VisitStmt(S);
 213   Record.AddStmt(S->getCond());
 214   Record.AddStmt(S->getBody());
 215   Record.AddSourceLocation(S->getDoLoc());
 216   Record.AddSourceLocation(S->getWhileLoc());
 217   Record.AddSourceLocation(S->getRParenLoc());
 218   Code = serialization::STMT_DO;
 219 }
 220
 221 void ASTStmtWriter::VisitForStmt(ForStmt *S) {
 222   VisitStmt(S);
 223   Record.AddStmt(S->getInit());
 224   Record.AddStmt(S->getCond());
 225   Record.AddStmt(S->getConditionVariableDeclStmt());
 226   Record.AddStmt(S->getInc());
 227   Record.AddStmt(S->getBody());
 228   Record.AddSourceLocation(S->getForLoc());
 229   Record.AddSourceLocation(S->getLParenLoc());
 230   Record.AddSourceLocation(S->getRParenLoc());
 231   Code = serialization::STMT_FOR;
 232 }
 233
 234 void ASTStmtWriter::VisitGotoStmt(GotoStmt *S) {
 235   VisitStmt(S);
 236   Record.AddDeclRef(S->getLabel());
 237   Record.AddSourceLocation(S->getGotoLoc());
 238   Record.AddSourceLocation(S->getLabelLoc());
 239   Code = serialization::STMT_GOTO;
 240 }
 241
 242 void ASTStmtWriter::VisitIndirectGotoStmt(IndirectGotoStmt *S) {
 243   VisitStmt(S);
 244   Record.AddSourceLocation(S->getGotoLoc());
 245   Record.AddSourceLocation(S->getStarLoc());
 246   Record.AddStmt(S->getTarget());
 247   Code = serialization::STMT_INDIRECT_GOTO;
 248 }
 249
 250 void ASTStmtWriter::VisitContinueStmt(ContinueStmt *S) {
 251   VisitStmt(S);
 252   Record.AddSourceLocation(S->getContinueLoc());
 253   Code = serialization::STMT_CONTINUE;
 254 }
 255
 256 void ASTStmtWriter::VisitBreakStmt(BreakStmt *S) {
 257   VisitStmt(S);
 258   Record.AddSourceLocation(S->getBreakLoc());
 259   Code = serialization::STMT_BREAK;
 260 }
 261
 262 void ASTStmtWriter::VisitReturnStmt(ReturnStmt *S) {
 263   VisitStmt(S);
 264
 265   bool HasNRVOCandidate = S->getNRVOCandidate() != nullptr;
 266   Record.push_back(HasNRVOCandidate);
 267
 268   Record.AddStmt(S->getRetValue());
 269   if (HasNRVOCandidate)
 270     Record.AddDeclRef(S->getNRVOCandidate());
 271
 272   Record.AddSourceLocation(S->getReturnLoc());
 273   Code = serialization::STMT_RETURN;
 274 }
 275
 276 void ASTStmtWriter::VisitDeclStmt(DeclStmt *S) {
 277   VisitStmt(S);
 278   Record.AddSourceLocation(S->getBeginLoc());
 279   Record.AddSourceLocation(S->getEndLoc());
 280   DeclGroupRef DG = S->getDeclGroup();
 281   for (DeclGroupRef::iterator D = DG.begin(), DEnd = DG.end(); D != DEnd; ++D)
 282     Record.AddDeclRef(*D);
 283   Code = serialization::STMT_DECL;
 284 }
 285
 286 void ASTStmtWriter::VisitAsmStmt(AsmStmt *S) {
 287   VisitStmt(S);
 288   Record.push_back(S->getNumOutputs());
 289   Record.push_back(S->getNumInputs());
 290   Record.push_back(S->getNumClobbers());
 291   Record.AddSourceLocation(S->getAsmLoc());
 292   Record.push_back(S->isVolatile());
 293   Record.push_back(S->isSimple());
 294 }
 295
 296 void ASTStmtWriter::VisitGCCAsmStmt(GCCAsmStmt *S) {
 297   VisitAsmStmt(S);
 298   Record.push_back(S->getNumLabels());
 299   Record.AddSourceLocation(S->getRParenLoc());
 300   Record.AddStmt(S->getAsmString());
 301
 302   // Outputs
 303   for (unsigned I = 0, N = S->getNumOutputs(); I != N; ++I) {
 304     Record.AddIdentifierRef(S->getOutputIdentifier(I));
 305     Record.AddStmt(S->getOutputConstraintLiteral(I));
 306     Record.AddStmt(S->getOutputExpr(I));
 307   }
 308
 309   // Inputs
 310   for (unsigned I = 0, N = S->getNumInputs(); I != N; ++I) {
 311     Record.AddIdentifierRef(S->getInputIdentifier(I));
 312     Record.AddStmt(S->getInputConstraintLiteral(I));
 313     Record.AddStmt(S->getInputExpr(I));
 314   }
 315
 316   // Clobbers
 317   for (unsigned I = 0, N = S->getNumClobbers(); I != N; ++I)
 318     Record.AddStmt(S->getClobberStringLiteral(I));
 319
 320   // Labels
 321   for (unsigned I = 0, N = S->getNumLabels(); I != N; ++I) {
 322     Record.AddIdentifierRef(S->getLabelIdentifier(I));
 323     Record.AddStmt(S->getLabelExpr(I));
 324   }
 325
 326   Code = serialization::STMT_GCCASM;
 327 }
 328
 329 void ASTStmtWriter::VisitMSAsmStmt(MSAsmStmt *S) {
 330   VisitAsmStmt(S);
 331   Record.AddSourceLocation(S->getLBraceLoc());
 332   Record.AddSourceLocation(S->getEndLoc());
 333   Record.push_back(S->getNumAsmToks());
 334   Record.AddString(S->getAsmString());
 335
 336   // Tokens
 337   for (unsigned I = 0, N = S->getNumAsmToks(); I != N; ++I) {
 338     // FIXME: Move this to ASTRecordWriter?
 339     Writer.AddToken(S->getAsmToks()[I], Record.getRecordData());
 340   }
 341
 342   // Clobbers
 343   for (unsigned I = 0, N = S->getNumClobbers(); I != N; ++I) {
 344     Record.AddString(S->getClobber(I));
 345   }
 346
 347   // Outputs
 348   for (unsigned I = 0, N = S->getNumOutputs(); I != N; ++I) {
 349     Record.AddStmt(S->getOutputExpr(I));
 350     Record.AddString(S->getOutputConstraint(I));
 351   }
 352
 353   // Inputs
 354   for (unsigned I = 0, N = S->getNumInputs(); I != N; ++I) {
 355     Record.AddStmt(S->getInputExpr(I));
 356     Record.AddString(S->getInputConstraint(I));
 357   }
 358
 359   Code = serialization::STMT_MSASM;
 360 }
 361
 362 void ASTStmtWriter::VisitCoroutineBodyStmt(CoroutineBodyStmt *CoroStmt) {
 363   VisitStmt(CoroStmt);
 364   Record.push_back(CoroStmt->getParamMoves().size());
 365   for (Stmt *S : CoroStmt->children())
 366     Record.AddStmt(S);
 367   Code = serialization::STMT_COROUTINE_BODY;
 368 }
 369
 370 void ASTStmtWriter::VisitCoreturnStmt(CoreturnStmt *S) {
 371   VisitStmt(S);
 372   Record.AddSourceLocation(S->getKeywordLoc());
 373   Record.AddStmt(S->getOperand());
 374   Record.AddStmt(S->getPromiseCall());
 375   Record.push_back(S->isImplicit());
 376   Code = serialization::STMT_CORETURN;
 377 }
 378
 379 void ASTStmtWriter::VisitCoroutineSuspendExpr(CoroutineSuspendExpr *E) {
 380   VisitExpr(E);
 381   Record.AddSourceLocation(E->getKeywordLoc());
 382   for (Stmt *S : E->children())
 383     Record.AddStmt(S);
 384   Record.AddStmt(E->getOpaqueValue());
 385 }
 386
 387 void ASTStmtWriter::VisitCoawaitExpr(CoawaitExpr *E) {
 388   VisitCoroutineSuspendExpr(E);
 389   Record.push_back(E->isImplicit());
 390   Code = serialization::EXPR_COAWAIT;
 391 }
 392
 393 void ASTStmtWriter::VisitCoyieldExpr(CoyieldExpr *E) {
 394   VisitCoroutineSuspendExpr(E);
 395   Code = serialization::EXPR_COYIELD;
 396 }
 397
 398 void ASTStmtWriter::VisitDependentCoawaitExpr(DependentCoawaitExpr *E) {
 399   VisitExpr(E);
 400   Record.AddSourceLocation(E->getKeywordLoc());
 401   for (Stmt *S : E->children())
 402     Record.AddStmt(S);
 403   Code = serialization::EXPR_DEPENDENT_COAWAIT;
 404 }
 405
 406 static void
 407 addConstraintSatisfaction(ASTRecordWriter &Record,
 408                           const ASTConstraintSatisfaction &Satisfaction) {
 409   Record.push_back(Satisfaction.IsSatisfied);
 410   Record.push_back(Satisfaction.ContainsErrors);
 411   if (!Satisfaction.IsSatisfied) {
 412     Record.push_back(Satisfaction.NumRecords);
 413     for (const auto &DetailRecord : Satisfaction) {
 414       Record.AddStmt(const_cast<Expr *>(DetailRecord.first));
 415       auto *E = DetailRecord.second.dyn_cast<Expr *>();
 416       Record.push_back(E == nullptr);
 417       if (E)
 418         Record.AddStmt(E);
 419       else {
 420         auto *Diag = DetailRecord.second.get<std::pair<SourceLocation,
 421                                                        StringRef> *>();
 422         Record.AddSourceLocation(Diag->first);
 423         Record.AddString(Diag->second);
 424       }
 425     }
 426   }
 427 }
 428
 429 static void
 430 addSubstitutionDiagnostic(
 431     ASTRecordWriter &Record,
 432     const concepts::Requirement::SubstitutionDiagnostic *D) {
 433   Record.AddString(D->SubstitutedEntity);
 434   Record.AddSourceLocation(D->DiagLoc);
 435   Record.AddString(D->DiagMessage);
 436 }
 437
 438 void ASTStmtWriter::VisitConceptSpecializationExpr(
 439         ConceptSpecializationExpr *E) {
 440   VisitExpr(E);
 441   Record.AddDeclRef(E->getSpecializationDecl());
 442   const ConceptReference *CR = E->getConceptReference();
 443   Record.push_back(CR != nullptr);
 444   if (CR)
 445     Record.AddConceptReference(CR);
 446   if (!E->isValueDependent())
 447     addConstraintSatisfaction(Record, E->getSatisfaction());
 448
 449   Code = serialization::EXPR_CONCEPT_SPECIALIZATION;
 450 }
 451
 452 void ASTStmtWriter::VisitRequiresExpr(RequiresExpr *E) {
 453   VisitExpr(E);
 454   Record.push_back(E->getLocalParameters().size());
 455   Record.push_back(E->getRequirements().size());
 456   Record.AddSourceLocation(E->RequiresExprBits.RequiresKWLoc);
 457   Record.push_back(E->RequiresExprBits.IsSatisfied);
 458   Record.AddDeclRef(E->getBody());
 459   for (ParmVarDecl *P : E->getLocalParameters())
 460     Record.AddDeclRef(P);
 461   for (concepts::Requirement *R : E->getRequirements()) {
 462     if (auto *TypeReq = dyn_cast<concepts::TypeRequirement>(R)) {
 463       Record.push_back(concepts::Requirement::RK_Type);
 464       Record.push_back(TypeReq->Status);
 465       if (TypeReq->Status == concepts::TypeRequirement::SS_SubstitutionFailure)
 466         addSubstitutionDiagnostic(Record, TypeReq->getSubstitutionDiagnostic());
 467       else
 468         Record.AddTypeSourceInfo(TypeReq->getType());
 469     } else if (auto *ExprReq = dyn_cast<concepts::ExprRequirement>(R)) {
 470       Record.push_back(ExprReq->getKind());
 471       Record.push_back(ExprReq->Status);
 472       if (ExprReq->isExprSubstitutionFailure()) {
 473         addSubstitutionDiagnostic(Record,
 474          ExprReq->Value.get<concepts::Requirement::SubstitutionDiagnostic *>());
 475       } else
 476         Record.AddStmt(ExprReq->Value.get<Expr *>());
 477       if (ExprReq->getKind() == concepts::Requirement::RK_Compound) {
 478         Record.AddSourceLocation(ExprReq->NoexceptLoc);
 479         const auto &RetReq = ExprReq->getReturnTypeRequirement();
 480         if (RetReq.isSubstitutionFailure()) {
 481           Record.push_back(2);
 482           addSubstitutionDiagnostic(Record, RetReq.getSubstitutionDiagnostic());
 483         } else if (RetReq.isTypeConstraint()) {
 484           Record.push_back(1);
 485           Record.AddTemplateParameterList(
 486               RetReq.getTypeConstraintTemplateParameterList());
 487           if (ExprReq->Status >=
 488               concepts::ExprRequirement::SS_ConstraintsNotSatisfied)
 489             Record.AddStmt(
 490                 ExprReq->getReturnTypeRequirementSubstitutedConstraintExpr());
 491         } else {
 492           assert(RetReq.isEmpty());
 493           Record.push_back(0);
 494         }
 495       }
 496     } else {
 497       auto *NestedReq = cast<concepts::NestedRequirement>(R);
 498       Record.push_back(concepts::Requirement::RK_Nested);
 499       Record.push_back(NestedReq->hasInvalidConstraint());
 500       if (NestedReq->hasInvalidConstraint()) {
 501         Record.AddString(NestedReq->getInvalidConstraintEntity());
 502         addConstraintSatisfaction(Record, *NestedReq->Satisfaction);
 503       } else {
 504         Record.AddStmt(NestedReq->getConstraintExpr());
 505         if (!NestedReq->isDependent())
 506           addConstraintSatisfaction(Record, *NestedReq->Satisfaction);
 507       }
 508     }
 509   }
 510   Record.AddSourceLocation(E->getLParenLoc());
 511   Record.AddSourceLocation(E->getRParenLoc());
 512   Record.AddSourceLocation(E->getEndLoc());
 513
 514   Code = serialization::EXPR_REQUIRES;
 515 }
 516
 517
 518 void ASTStmtWriter::VisitCapturedStmt(CapturedStmt *S) {
 519   VisitStmt(S);
 520   // NumCaptures
 521   Record.push_back(std::distance(S->capture_begin(), S->capture_end()));
 522
 523   // CapturedDecl and captured region kind
 524   Record.AddDeclRef(S->getCapturedDecl());
 525   Record.push_back(S->getCapturedRegionKind());
 526
 527   Record.AddDeclRef(S->getCapturedRecordDecl());
 528
 529   // Capture inits
 530   for (auto *I : S->capture_inits())
 531     Record.AddStmt(I);
 532
 533   // Body
 534   Record.AddStmt(S->getCapturedStmt());
 535
 536   // Captures
 537   for (const auto &I : S->captures()) {
 538     if (I.capturesThis() || I.capturesVariableArrayType())
 539       Record.AddDeclRef(nullptr);
 540     else
 541       Record.AddDeclRef(I.getCapturedVar());
 542     Record.push_back(I.getCaptureKind());
 543     Record.AddSourceLocation(I.getLocation());
 544   }
 545
 546   Code = serialization::STMT_CAPTURED;
 547 }
 548
 549 void ASTStmtWriter::VisitExpr(Expr *E) {
 550   VisitStmt(E);
 551   Record.AddTypeRef(E->getType());
 552   Record.push_back(E->getDependence());
 553   Record.push_back(E->getValueKind());
 554   Record.push_back(E->getObjectKind());
 555 }
 556
 557 void ASTStmtWriter::VisitConstantExpr(ConstantExpr *E) {
 558   VisitExpr(E);
 559   Record.push_back(E->ConstantExprBits.ResultKind);
 560
 561   Record.push_back(E->ConstantExprBits.APValueKind);
 562   Record.push_back(E->ConstantExprBits.IsUnsigned);
 563   Record.push_back(E->ConstantExprBits.BitWidth);
 564   // HasCleanup not serialized since we can just query the APValue.
 565   Record.push_back(E->ConstantExprBits.IsImmediateInvocation);
 566
 567   switch (E->ConstantExprBits.ResultKind) {
 568   case ConstantExpr::RSK_None:
 569     break;
 570   case ConstantExpr::RSK_Int64:
 571     Record.push_back(E->Int64Result());
 572     break;
 573   case ConstantExpr::RSK_APValue:
 574     Record.AddAPValue(E->APValueResult());
 575     break;
 576   default:
 577     llvm_unreachable("unexpected ResultKind!");
 578   }
 579
 580   Record.AddStmt(E->getSubExpr());
 581   Code = serialization::EXPR_CONSTANT;
 582 }
 583
 584 void ASTStmtWriter::VisitSYCLUniqueStableNameExpr(SYCLUniqueStableNameExpr *E) {
 585   VisitExpr(E);
 586
 587   Record.AddSourceLocation(E->getLocation());
 588   Record.AddSourceLocation(E->getLParenLocation());
 589   Record.AddSourceLocation(E->getRParenLocation());
 590   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
 591
 592   Code = serialization::EXPR_SYCL_UNIQUE_STABLE_NAME;
 593 }
 594
 595 void ASTStmtWriter::VisitPredefinedExpr(PredefinedExpr *E) {
 596   VisitExpr(E);
 597
 598   bool HasFunctionName = E->getFunctionName() != nullptr;
 599   Record.push_back(HasFunctionName);
 600   Record.push_back(E->getIdentKind()); // FIXME: stable encoding
 601   Record.push_back(E->isTransparent());
 602   Record.AddSourceLocation(E->getLocation());
 603   if (HasFunctionName)
 604     Record.AddStmt(E->getFunctionName());
 605   Code = serialization::EXPR_PREDEFINED;
 606 }
 607
 608 void ASTStmtWriter::VisitDeclRefExpr(DeclRefExpr *E) {
 609   VisitExpr(E);
 610
 611   Record.push_back(E->hasQualifier());
 612   Record.push_back(E->getDecl() != E->getFoundDecl());
 613   Record.push_back(E->hasTemplateKWAndArgsInfo());
 614   Record.push_back(E->hadMultipleCandidates());
 615   Record.push_back(E->refersToEnclosingVariableOrCapture());
 616   Record.push_back(E->isNonOdrUse());
 617   Record.push_back(E->isImmediateEscalating());
 618
 619   if (E->hasTemplateKWAndArgsInfo()) {
 620     unsigned NumTemplateArgs = E->getNumTemplateArgs();
 621     Record.push_back(NumTemplateArgs);
 622   }
 623
 624   DeclarationName::NameKind nk = (E->getDecl()->getDeclName().getNameKind());
 625
 626   if ((!E->hasTemplateKWAndArgsInfo()) && (!E->hasQualifier()) &&
 627       (E->getDecl() == E->getFoundDecl()) &&
 628       nk == DeclarationName::Identifier &&
 629       !E->refersToEnclosingVariableOrCapture() && !E->isNonOdrUse() &&
 630       !E->isImmediateEscalating()) {
 631     AbbrevToUse = Writer.getDeclRefExprAbbrev();
 632   }
 633
 634   if (E->hasQualifier())
 635     Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
 636
 637   if (E->getDecl() != E->getFoundDecl())
 638     Record.AddDeclRef(E->getFoundDecl());
 639
 640   if (E->hasTemplateKWAndArgsInfo())
 641     AddTemplateKWAndArgsInfo(*E->getTrailingObjects<ASTTemplateKWAndArgsInfo>(),
 642                              E->getTrailingObjects<TemplateArgumentLoc>());
 643
 644   Record.AddDeclRef(E->getDecl());
 645   Record.AddSourceLocation(E->getLocation());
 646   Record.AddDeclarationNameLoc(E->DNLoc, E->getDecl()->getDeclName());
 647   Code = serialization::EXPR_DECL_REF;
 648 }
 649
 650 void ASTStmtWriter::VisitIntegerLiteral(IntegerLiteral *E) {
 651   VisitExpr(E);
 652   Record.AddSourceLocation(E->getLocation());
 653   Record.AddAPInt(E->getValue());
 654
 655   if (E->getValue().getBitWidth() == 32) {
 656     AbbrevToUse = Writer.getIntegerLiteralAbbrev();
 657   }
 658
 659   Code = serialization::EXPR_INTEGER_LITERAL;
 660 }
 661
 662 void ASTStmtWriter::VisitFixedPointLiteral(FixedPointLiteral *E) {
 663   VisitExpr(E);
 664   Record.AddSourceLocation(E->getLocation());
 665   Record.push_back(E->getScale());
 666   Record.AddAPInt(E->getValue());
 667   Code = serialization::EXPR_FIXEDPOINT_LITERAL;
 668 }
 669
 670 void ASTStmtWriter::VisitFloatingLiteral(FloatingLiteral *E) {
 671   VisitExpr(E);
 672   Record.push_back(E->getRawSemantics());
 673   Record.push_back(E->isExact());
 674   Record.AddAPFloat(E->getValue());
 675   Record.AddSourceLocation(E->getLocation());
 676   Code = serialization::EXPR_FLOATING_LITERAL;
 677 }
 678
 679 void ASTStmtWriter::VisitImaginaryLiteral(ImaginaryLiteral *E) {
 680   VisitExpr(E);
 681   Record.AddStmt(E->getSubExpr());
 682   Code = serialization::EXPR_IMAGINARY_LITERAL;
 683 }
 684
 685 void ASTStmtWriter::VisitStringLiteral(StringLiteral *E) {
 686   VisitExpr(E);
 687
 688   // Store the various bits of data of StringLiteral.
 689   Record.push_back(E->getNumConcatenated());
 690   Record.push_back(E->getLength());
 691   Record.push_back(E->getCharByteWidth());
 692   Record.push_back(E->getKind());
 693   Record.push_back(E->isPascal());
 694
 695   // Store the trailing array of SourceLocation.
 696   for (unsigned I = 0, N = E->getNumConcatenated(); I != N; ++I)
 697     Record.AddSourceLocation(E->getStrTokenLoc(I));
 698
 699   // Store the trailing array of char holding the string data.
 700   StringRef StrData = E->getBytes();
 701   for (unsigned I = 0, N = E->getByteLength(); I != N; ++I)
 702     Record.push_back(StrData[I]);
 703
 704   Code = serialization::EXPR_STRING_LITERAL;
 705 }
 706
 707 void ASTStmtWriter::VisitCharacterLiteral(CharacterLiteral *E) {
 708   VisitExpr(E);
 709   Record.push_back(E->getValue());
 710   Record.AddSourceLocation(E->getLocation());
 711   Record.push_back(E->getKind());
 712
 713   AbbrevToUse = Writer.getCharacterLiteralAbbrev();
 714
 715   Code = serialization::EXPR_CHARACTER_LITERAL;
 716 }
 717
 718 void ASTStmtWriter::VisitParenExpr(ParenExpr *E) {
 719   VisitExpr(E);
 720   Record.AddSourceLocation(E->getLParen());
 721   Record.AddSourceLocation(E->getRParen());
 722   Record.AddStmt(E->getSubExpr());
 723   Code = serialization::EXPR_PAREN;
 724 }
 725
 726 void ASTStmtWriter::VisitParenListExpr(ParenListExpr *E) {
 727   VisitExpr(E);
 728   Record.push_back(E->getNumExprs());
 729   for (auto *SubStmt : E->exprs())
 730     Record.AddStmt(SubStmt);
 731   Record.AddSourceLocation(E->getLParenLoc());
 732   Record.AddSourceLocation(E->getRParenLoc());
 733   Code = serialization::EXPR_PAREN_LIST;
 734 }
 735
 736 void ASTStmtWriter::VisitUnaryOperator(UnaryOperator *E) {
 737   VisitExpr(E);
 738   bool HasFPFeatures = E->hasStoredFPFeatures();
 739   // Write this first for easy access when deserializing, as they affect the
 740   // size of the UnaryOperator.
 741   Record.push_back(HasFPFeatures);
 742   Record.AddStmt(E->getSubExpr());
 743   Record.push_back(E->getOpcode()); // FIXME: stable encoding
 744   Record.AddSourceLocation(E->getOperatorLoc());
 745   Record.push_back(E->canOverflow());
 746   if (HasFPFeatures)
 747     Record.push_back(E->getStoredFPFeatures().getAsOpaqueInt());
 748   Code = serialization::EXPR_UNARY_OPERATOR;
 749 }
 750
 751 void ASTStmtWriter::VisitOffsetOfExpr(OffsetOfExpr *E) {
 752   VisitExpr(E);
 753   Record.push_back(E->getNumComponents());
 754   Record.push_back(E->getNumExpressions());
 755   Record.AddSourceLocation(E->getOperatorLoc());
 756   Record.AddSourceLocation(E->getRParenLoc());
 757   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
 758   for (unsigned I = 0, N = E->getNumComponents(); I != N; ++I) {
 759     const OffsetOfNode &ON = E->getComponent(I);
 760     Record.push_back(ON.getKind()); // FIXME: Stable encoding
 761     Record.AddSourceLocation(ON.getSourceRange().getBegin());
 762     Record.AddSourceLocation(ON.getSourceRange().getEnd());
 763     switch (ON.getKind()) {
 764     case OffsetOfNode::Array:
 765       Record.push_back(ON.getArrayExprIndex());
 766       break;
 767
 768     case OffsetOfNode::Field:
 769       Record.AddDeclRef(ON.getField());
 770       break;
 771
 772     case OffsetOfNode::Identifier:
 773       Record.AddIdentifierRef(ON.getFieldName());
 774       break;
 775
 776     case OffsetOfNode::Base:
 777       Record.AddCXXBaseSpecifier(*ON.getBase());
 778       break;
 779     }
 780   }
 781   for (unsigned I = 0, N = E->getNumExpressions(); I != N; ++I)
 782     Record.AddStmt(E->getIndexExpr(I));
 783   Code = serialization::EXPR_OFFSETOF;
 784 }
 785
 786 void ASTStmtWriter::VisitUnaryExprOrTypeTraitExpr(UnaryExprOrTypeTraitExpr *E) {
 787   VisitExpr(E);
 788   Record.push_back(E->getKind());
 789   if (E->isArgumentType())
 790     Record.AddTypeSourceInfo(E->getArgumentTypeInfo());
 791   else {
 792     Record.push_back(0);
 793     Record.AddStmt(E->getArgumentExpr());
 794   }
 795   Record.AddSourceLocation(E->getOperatorLoc());
 796   Record.AddSourceLocation(E->getRParenLoc());
 797   Code = serialization::EXPR_SIZEOF_ALIGN_OF;
 798 }
 799
 800 void ASTStmtWriter::VisitArraySubscriptExpr(ArraySubscriptExpr *E) {
 801   VisitExpr(E);
 802   Record.AddStmt(E->getLHS());
 803   Record.AddStmt(E->getRHS());
 804   Record.AddSourceLocation(E->getRBracketLoc());
 805   Code = serialization::EXPR_ARRAY_SUBSCRIPT;
 806 }
 807
 808 void ASTStmtWriter::VisitMatrixSubscriptExpr(MatrixSubscriptExpr *E) {
 809   VisitExpr(E);
 810   Record.AddStmt(E->getBase());
 811   Record.AddStmt(E->getRowIdx());
 812   Record.AddStmt(E->getColumnIdx());
 813   Record.AddSourceLocation(E->getRBracketLoc());
 814   Code = serialization::EXPR_ARRAY_SUBSCRIPT;
 815 }
 816
 817 void ASTStmtWriter::VisitOMPArraySectionExpr(OMPArraySectionExpr *E) {
 818   VisitExpr(E);
 819   Record.AddStmt(E->getBase());
 820   Record.AddStmt(E->getLowerBound());
 821   Record.AddStmt(E->getLength());
 822   Record.AddStmt(E->getStride());
 823   Record.AddSourceLocation(E->getColonLocFirst());
 824   Record.AddSourceLocation(E->getColonLocSecond());
 825   Record.AddSourceLocation(E->getRBracketLoc());
 826   Code = serialization::EXPR_OMP_ARRAY_SECTION;
 827 }
 828
 829 void ASTStmtWriter::VisitOMPArrayShapingExpr(OMPArrayShapingExpr *E) {
 830   VisitExpr(E);
 831   Record.push_back(E->getDimensions().size());
 832   Record.AddStmt(E->getBase());
 833   for (Expr *Dim : E->getDimensions())
 834     Record.AddStmt(Dim);
 835   for (SourceRange SR : E->getBracketsRanges())
 836     Record.AddSourceRange(SR);
 837   Record.AddSourceLocation(E->getLParenLoc());
 838   Record.AddSourceLocation(E->getRParenLoc());
 839   Code = serialization::EXPR_OMP_ARRAY_SHAPING;
 840 }
 841
 842 void ASTStmtWriter::VisitOMPIteratorExpr(OMPIteratorExpr *E) {
 843   VisitExpr(E);
 844   Record.push_back(E->numOfIterators());
 845   Record.AddSourceLocation(E->getIteratorKwLoc());
 846   Record.AddSourceLocation(E->getLParenLoc());
 847   Record.AddSourceLocation(E->getRParenLoc());
 848   for (unsigned I = 0, End = E->numOfIterators(); I < End; ++I) {
 849     Record.AddDeclRef(E->getIteratorDecl(I));
 850     Record.AddSourceLocation(E->getAssignLoc(I));
 851     OMPIteratorExpr::IteratorRange Range = E->getIteratorRange(I);
 852     Record.AddStmt(Range.Begin);
 853     Record.AddStmt(Range.End);
 854     Record.AddStmt(Range.Step);
 855     Record.AddSourceLocation(E->getColonLoc(I));
 856     if (Range.Step)
 857       Record.AddSourceLocation(E->getSecondColonLoc(I));
 858     // Serialize helpers
 859     OMPIteratorHelperData &HD = E->getHelper(I);
 860     Record.AddDeclRef(HD.CounterVD);
 861     Record.AddStmt(HD.Upper);
 862     Record.AddStmt(HD.Update);
 863     Record.AddStmt(HD.CounterUpdate);
 864   }
 865   Code = serialization::EXPR_OMP_ITERATOR;
 866 }
 867
 868 void ASTStmtWriter::VisitCallExpr(CallExpr *E) {
 869   VisitExpr(E);
 870   Record.push_back(E->getNumArgs());
 871   Record.push_back(E->hasStoredFPFeatures());
 872   Record.AddSourceLocation(E->getRParenLoc());
 873   Record.AddStmt(E->getCallee());
 874   for (CallExpr::arg_iterator Arg = E->arg_begin(), ArgEnd = E->arg_end();
 875        Arg != ArgEnd; ++Arg)
 876     Record.AddStmt(*Arg);
 877   Record.push_back(static_cast<unsigned>(E->getADLCallKind()));
 878   if (E->hasStoredFPFeatures())
 879     Record.push_back(E->getFPFeatures().getAsOpaqueInt());
 880   Code = serialization::EXPR_CALL;
 881 }
 882
 883 void ASTStmtWriter::VisitRecoveryExpr(RecoveryExpr *E) {
 884   VisitExpr(E);
 885   Record.push_back(std::distance(E->children().begin(), E->children().end()));
 886   Record.AddSourceLocation(E->getBeginLoc());
 887   Record.AddSourceLocation(E->getEndLoc());
 888   for (Stmt *Child : E->children())
 889     Record.AddStmt(Child);
 890   Code = serialization::EXPR_RECOVERY;
 891 }
 892
 893 void ASTStmtWriter::VisitMemberExpr(MemberExpr *E) {
 894   VisitExpr(E);
 895
 896   bool HasQualifier = E->hasQualifier();
 897   bool HasFoundDecl =
 898       E->hasQualifierOrFoundDecl() &&
 899       (E->getFoundDecl().getDecl() != E->getMemberDecl() ||
 900        E->getFoundDecl().getAccess() != E->getMemberDecl()->getAccess());
 901   bool HasTemplateInfo = E->hasTemplateKWAndArgsInfo();
 902   unsigned NumTemplateArgs = E->getNumTemplateArgs();
 903
 904   // Write these first for easy access when deserializing, as they affect the
 905   // size of the MemberExpr.
 906   Record.push_back(HasQualifier);
 907   Record.push_back(HasFoundDecl);
 908   Record.push_back(HasTemplateInfo);
 909   Record.push_back(NumTemplateArgs);
 910
 911   Record.AddStmt(E->getBase());
 912   Record.AddDeclRef(E->getMemberDecl());
 913   Record.AddDeclarationNameLoc(E->MemberDNLoc,
 914                                E->getMemberDecl()->getDeclName());
 915   Record.AddSourceLocation(E->getMemberLoc());
 916   Record.push_back(E->isArrow());
 917   Record.push_back(E->hadMultipleCandidates());
 918   Record.push_back(E->isNonOdrUse());
 919   Record.AddSourceLocation(E->getOperatorLoc());
 920
 921   if (HasFoundDecl) {
 922     DeclAccessPair FoundDecl = E->getFoundDecl();
 923     Record.AddDeclRef(FoundDecl.getDecl());
 924     Record.push_back(FoundDecl.getAccess());
 925   }
 926
 927   if (HasQualifier)
 928     Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
 929
 930   if (HasTemplateInfo)
 931     AddTemplateKWAndArgsInfo(*E->getTrailingObjects<ASTTemplateKWAndArgsInfo>(),
 932                              E->getTrailingObjects<TemplateArgumentLoc>());
 933
 934   Code = serialization::EXPR_MEMBER;
 935 }
 936
 937 void ASTStmtWriter::VisitObjCIsaExpr(ObjCIsaExpr *E) {
 938   VisitExpr(E);
 939   Record.AddStmt(E->getBase());
 940   Record.AddSourceLocation(E->getIsaMemberLoc());
 941   Record.AddSourceLocation(E->getOpLoc());
 942   Record.push_back(E->isArrow());
 943   Code = serialization::EXPR_OBJC_ISA;
 944 }
 945
 946 void ASTStmtWriter::
 947 VisitObjCIndirectCopyRestoreExpr(ObjCIndirectCopyRestoreExpr *E) {
 948   VisitExpr(E);
 949   Record.AddStmt(E->getSubExpr());
 950   Record.push_back(E->shouldCopy());
 951   Code = serialization::EXPR_OBJC_INDIRECT_COPY_RESTORE;
 952 }
 953
 954 void ASTStmtWriter::VisitObjCBridgedCastExpr(ObjCBridgedCastExpr *E) {
 955   VisitExplicitCastExpr(E);
 956   Record.AddSourceLocation(E->getLParenLoc());
 957   Record.AddSourceLocation(E->getBridgeKeywordLoc());
 958   Record.push_back(E->getBridgeKind()); // FIXME: Stable encoding
 959   Code = serialization::EXPR_OBJC_BRIDGED_CAST;
 960 }
 961
 962 void ASTStmtWriter::VisitCastExpr(CastExpr *E) {
 963   VisitExpr(E);
 964   Record.push_back(E->path_size());
 965   Record.push_back(E->hasStoredFPFeatures());
 966   Record.AddStmt(E->getSubExpr());
 967   Record.push_back(E->getCastKind()); // FIXME: stable encoding
 968
 969   for (CastExpr::path_iterator
 970          PI = E->path_begin(), PE = E->path_end(); PI != PE; ++PI)
 971     Record.AddCXXBaseSpecifier(**PI);
 972
 973   if (E->hasStoredFPFeatures())
 974     Record.push_back(E->getFPFeatures().getAsOpaqueInt());
 975 }
 976
 977 void ASTStmtWriter::VisitBinaryOperator(BinaryOperator *E) {
 978   VisitExpr(E);
 979   bool HasFPFeatures = E->hasStoredFPFeatures();
 980   // Write this first for easy access when deserializing, as they affect the
 981   // size of the UnaryOperator.
 982   Record.push_back(HasFPFeatures);
 983   Record.push_back(E->getOpcode()); // FIXME: stable encoding
 984   Record.AddStmt(E->getLHS());
 985   Record.AddStmt(E->getRHS());
 986   Record.AddSourceLocation(E->getOperatorLoc());
 987   if (HasFPFeatures)
 988     Record.push_back(E->getStoredFPFeatures().getAsOpaqueInt());
 989   Code = serialization::EXPR_BINARY_OPERATOR;
 990 }
 991
 992 void ASTStmtWriter::VisitCompoundAssignOperator(CompoundAssignOperator *E) {
 993   VisitBinaryOperator(E);
 994   Record.AddTypeRef(E->getComputationLHSType());
 995   Record.AddTypeRef(E->getComputationResultType());
 996   Code = serialization::EXPR_COMPOUND_ASSIGN_OPERATOR;
 997 }
 998
 999 void ASTStmtWriter::VisitConditionalOperator(ConditionalOperator *E) {
1000   VisitExpr(E);
1001   Record.AddStmt(E->getCond());
1002   Record.AddStmt(E->getLHS());
1003   Record.AddStmt(E->getRHS());
1004   Record.AddSourceLocation(E->getQuestionLoc());
1005   Record.AddSourceLocation(E->getColonLoc());
1006   Code = serialization::EXPR_CONDITIONAL_OPERATOR;
1007 }
1008
1009 void
1010 ASTStmtWriter::VisitBinaryConditionalOperator(BinaryConditionalOperator *E) {
1011   VisitExpr(E);
1012   Record.AddStmt(E->getOpaqueValue());
1013   Record.AddStmt(E->getCommon());
1014   Record.AddStmt(E->getCond());
1015   Record.AddStmt(E->getTrueExpr());
1016   Record.AddStmt(E->getFalseExpr());
1017   Record.AddSourceLocation(E->getQuestionLoc());
1018   Record.AddSourceLocation(E->getColonLoc());
1019   Code = serialization::EXPR_BINARY_CONDITIONAL_OPERATOR;
1020 }
1021
1022 void ASTStmtWriter::VisitImplicitCastExpr(ImplicitCastExpr *E) {
1023   VisitCastExpr(E);
1024   Record.push_back(E->isPartOfExplicitCast());
1025
1026   if (E->path_size() == 0 && !E->hasStoredFPFeatures())
1027     AbbrevToUse = Writer.getExprImplicitCastAbbrev();
1028
1029   Code = serialization::EXPR_IMPLICIT_CAST;
1030 }
1031
1032 void ASTStmtWriter::VisitExplicitCastExpr(ExplicitCastExpr *E) {
1033   VisitCastExpr(E);
1034   Record.AddTypeSourceInfo(E->getTypeInfoAsWritten());
1035 }
1036
1037 void ASTStmtWriter::VisitCStyleCastExpr(CStyleCastExpr *E) {
1038   VisitExplicitCastExpr(E);
1039   Record.AddSourceLocation(E->getLParenLoc());
1040   Record.AddSourceLocation(E->getRParenLoc());
1041   Code = serialization::EXPR_CSTYLE_CAST;
1042 }
1043
1044 void ASTStmtWriter::VisitCompoundLiteralExpr(CompoundLiteralExpr *E) {
1045   VisitExpr(E);
1046   Record.AddSourceLocation(E->getLParenLoc());
1047   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1048   Record.AddStmt(E->getInitializer());
1049   Record.push_back(E->isFileScope());
1050   Code = serialization::EXPR_COMPOUND_LITERAL;
1051 }
1052
1053 void ASTStmtWriter::VisitExtVectorElementExpr(ExtVectorElementExpr *E) {
1054   VisitExpr(E);
1055   Record.AddStmt(E->getBase());
1056   Record.AddIdentifierRef(&E->getAccessor());
1057   Record.AddSourceLocation(E->getAccessorLoc());
1058   Code = serialization::EXPR_EXT_VECTOR_ELEMENT;
1059 }
1060
1061 void ASTStmtWriter::VisitInitListExpr(InitListExpr *E) {
1062   VisitExpr(E);
1063   // NOTE: only add the (possibly null) syntactic form.
1064   // No need to serialize the isSemanticForm flag and the semantic form.
1065   Record.AddStmt(E->getSyntacticForm());
1066   Record.AddSourceLocation(E->getLBraceLoc());
1067   Record.AddSourceLocation(E->getRBraceLoc());
1068   bool isArrayFiller = E->ArrayFillerOrUnionFieldInit.is<Expr*>();
1069   Record.push_back(isArrayFiller);
1070   if (isArrayFiller)
1071     Record.AddStmt(E->getArrayFiller());
1072   else
1073     Record.AddDeclRef(E->getInitializedFieldInUnion());
1074   Record.push_back(E->hadArrayRangeDesignator());
1075   Record.push_back(E->getNumInits());
1076   if (isArrayFiller) {
1077     // ArrayFiller may have filled "holes" due to designated initializer.
1078     // Replace them by 0 to indicate that the filler goes in that place.
1079     Expr *filler = E->getArrayFiller();
1080     for (unsigned I = 0, N = E->getNumInits(); I != N; ++I)
1081       Record.AddStmt(E->getInit(I) != filler ? E->getInit(I) : nullptr);
1082   } else {
1083     for (unsigned I = 0, N = E->getNumInits(); I != N; ++I)
1084       Record.AddStmt(E->getInit(I));
1085   }
1086   Code = serialization::EXPR_INIT_LIST;
1087 }
1088
1089 void ASTStmtWriter::VisitDesignatedInitExpr(DesignatedInitExpr *E) {
1090   VisitExpr(E);
1091   Record.push_back(E->getNumSubExprs());
1092   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
1093     Record.AddStmt(E->getSubExpr(I));
1094   Record.AddSourceLocation(E->getEqualOrColonLoc());
1095   Record.push_back(E->usesGNUSyntax());
1096   for (const DesignatedInitExpr::Designator &D : E->designators()) {
1097     if (D.isFieldDesignator()) {
1098       if (FieldDecl *Field = D.getFieldDecl()) {
1099         Record.push_back(serialization::DESIG_FIELD_DECL);
1100         Record.AddDeclRef(Field);
1101       } else {
1102         Record.push_back(serialization::DESIG_FIELD_NAME);
1103         Record.AddIdentifierRef(D.getFieldName());
1104       }
1105       Record.AddSourceLocation(D.getDotLoc());
1106       Record.AddSourceLocation(D.getFieldLoc());
1107     } else if (D.isArrayDesignator()) {
1108       Record.push_back(serialization::DESIG_ARRAY);
1109       Record.push_back(D.getArrayIndex());
1110       Record.AddSourceLocation(D.getLBracketLoc());
1111       Record.AddSourceLocation(D.getRBracketLoc());
1112     } else {
1113       assert(D.isArrayRangeDesignator() && "Unknown designator");
1114       Record.push_back(serialization::DESIG_ARRAY_RANGE);
1115       Record.push_back(D.getArrayIndex());
1116       Record.AddSourceLocation(D.getLBracketLoc());
1117       Record.AddSourceLocation(D.getEllipsisLoc());
1118       Record.AddSourceLocation(D.getRBracketLoc());
1119     }
1120   }
1121   Code = serialization::EXPR_DESIGNATED_INIT;
1122 }
1123
1124 void ASTStmtWriter::VisitDesignatedInitUpdateExpr(DesignatedInitUpdateExpr *E) {
1125   VisitExpr(E);
1126   Record.AddStmt(E->getBase());
1127   Record.AddStmt(E->getUpdater());
1128   Code = serialization::EXPR_DESIGNATED_INIT_UPDATE;
1129 }
1130
1131 void ASTStmtWriter::VisitNoInitExpr(NoInitExpr *E) {
1132   VisitExpr(E);
1133   Code = serialization::EXPR_NO_INIT;
1134 }
1135
1136 void ASTStmtWriter::VisitArrayInitLoopExpr(ArrayInitLoopExpr *E) {
1137   VisitExpr(E);
1138   Record.AddStmt(E->SubExprs[0]);
1139   Record.AddStmt(E->SubExprs[1]);
1140   Code = serialization::EXPR_ARRAY_INIT_LOOP;
1141 }
1142
1143 void ASTStmtWriter::VisitArrayInitIndexExpr(ArrayInitIndexExpr *E) {
1144   VisitExpr(E);
1145   Code = serialization::EXPR_ARRAY_INIT_INDEX;
1146 }
1147
1148 void ASTStmtWriter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) {
1149   VisitExpr(E);
1150   Code = serialization::EXPR_IMPLICIT_VALUE_INIT;
1151 }
1152
1153 void ASTStmtWriter::VisitVAArgExpr(VAArgExpr *E) {
1154   VisitExpr(E);
1155   Record.AddStmt(E->getSubExpr());
1156   Record.AddTypeSourceInfo(E->getWrittenTypeInfo());
1157   Record.AddSourceLocation(E->getBuiltinLoc());
1158   Record.AddSourceLocation(E->getRParenLoc());
1159   Record.push_back(E->isMicrosoftABI());
1160   Code = serialization::EXPR_VA_ARG;
1161 }
1162
1163 void ASTStmtWriter::VisitSourceLocExpr(SourceLocExpr *E) {
1164   VisitExpr(E);
1165   Record.AddDeclRef(cast_or_null<Decl>(E->getParentContext()));
1166   Record.AddSourceLocation(E->getBeginLoc());
1167   Record.AddSourceLocation(E->getEndLoc());
1168   Record.push_back(E->getIdentKind());
1169   Code = serialization::EXPR_SOURCE_LOC;
1170 }
1171
1172 void ASTStmtWriter::VisitAddrLabelExpr(AddrLabelExpr *E) {
1173   VisitExpr(E);
1174   Record.AddSourceLocation(E->getAmpAmpLoc());
1175   Record.AddSourceLocation(E->getLabelLoc());
1176   Record.AddDeclRef(E->getLabel());
1177   Code = serialization::EXPR_ADDR_LABEL;
1178 }
1179
1180 void ASTStmtWriter::VisitStmtExpr(StmtExpr *E) {
1181   VisitExpr(E);
1182   Record.AddStmt(E->getSubStmt());
1183   Record.AddSourceLocation(E->getLParenLoc());
1184   Record.AddSourceLocation(E->getRParenLoc());
1185   Record.push_back(E->getTemplateDepth());
1186   Code = serialization::EXPR_STMT;
1187 }
1188
1189 void ASTStmtWriter::VisitChooseExpr(ChooseExpr *E) {
1190   VisitExpr(E);
1191   Record.AddStmt(E->getCond());
1192   Record.AddStmt(E->getLHS());
1193   Record.AddStmt(E->getRHS());
1194   Record.AddSourceLocation(E->getBuiltinLoc());
1195   Record.AddSourceLocation(E->getRParenLoc());
1196   Record.push_back(E->isConditionDependent() ? false : E->isConditionTrue());
1197   Code = serialization::EXPR_CHOOSE;
1198 }
1199
1200 void ASTStmtWriter::VisitGNUNullExpr(GNUNullExpr *E) {
1201   VisitExpr(E);
1202   Record.AddSourceLocation(E->getTokenLocation());
1203   Code = serialization::EXPR_GNU_NULL;
1204 }
1205
1206 void ASTStmtWriter::VisitShuffleVectorExpr(ShuffleVectorExpr *E) {
1207   VisitExpr(E);
1208   Record.push_back(E->getNumSubExprs());
1209   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
1210     Record.AddStmt(E->getExpr(I));
1211   Record.AddSourceLocation(E->getBuiltinLoc());
1212   Record.AddSourceLocation(E->getRParenLoc());
1213   Code = serialization::EXPR_SHUFFLE_VECTOR;
1214 }
1215
1216 void ASTStmtWriter::VisitConvertVectorExpr(ConvertVectorExpr *E) {
1217   VisitExpr(E);
1218   Record.AddSourceLocation(E->getBuiltinLoc());
1219   Record.AddSourceLocation(E->getRParenLoc());
1220   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1221   Record.AddStmt(E->getSrcExpr());
1222   Code = serialization::EXPR_CONVERT_VECTOR;
1223 }
1224
1225 void ASTStmtWriter::VisitBlockExpr(BlockExpr *E) {
1226   VisitExpr(E);
1227   Record.AddDeclRef(E->getBlockDecl());
1228   Code = serialization::EXPR_BLOCK;
1229 }
1230
1231 void ASTStmtWriter::VisitGenericSelectionExpr(GenericSelectionExpr *E) {
1232   VisitExpr(E);
1233
1234   Record.push_back(E->getNumAssocs());
1235   Record.push_back(E->isExprPredicate());
1236   Record.push_back(E->ResultIndex);
1237   Record.AddSourceLocation(E->getGenericLoc());
1238   Record.AddSourceLocation(E->getDefaultLoc());
1239   Record.AddSourceLocation(E->getRParenLoc());
1240
1241   Stmt **Stmts = E->getTrailingObjects<Stmt *>();
1242   // Add 1 to account for the controlling expression which is the first
1243   // expression in the trailing array of Stmt *. This is not needed for
1244   // the trailing array of TypeSourceInfo *.
1245   for (unsigned I = 0, N = E->getNumAssocs() + 1; I < N; ++I)
1246     Record.AddStmt(Stmts[I]);
1247
1248   TypeSourceInfo **TSIs = E->getTrailingObjects<TypeSourceInfo *>();
1249   for (unsigned I = 0, N = E->getNumAssocs(); I < N; ++I)
1250     Record.AddTypeSourceInfo(TSIs[I]);
1251
1252   Code = serialization::EXPR_GENERIC_SELECTION;
1253 }
1254
1255 void ASTStmtWriter::VisitPseudoObjectExpr(PseudoObjectExpr *E) {
1256   VisitExpr(E);
1257   Record.push_back(E->getNumSemanticExprs());
1258
1259   // Push the result index.  Currently, this needs to exactly match
1260   // the encoding used internally for ResultIndex.
1261   unsigned result = E->getResultExprIndex();
1262   result = (result == PseudoObjectExpr::NoResult ? 0 : result + 1);
1263   Record.push_back(result);
1264
1265   Record.AddStmt(E->getSyntacticForm());
1266   for (PseudoObjectExpr::semantics_iterator
1267          i = E->semantics_begin(), e = E->semantics_end(); i != e; ++i) {
1268     Record.AddStmt(*i);
1269   }
1270   Code = serialization::EXPR_PSEUDO_OBJECT;
1271 }
1272
1273 void ASTStmtWriter::VisitAtomicExpr(AtomicExpr *E) {
1274   VisitExpr(E);
1275   Record.push_back(E->getOp());
1276   for (unsigned I = 0, N = E->getNumSubExprs(); I != N; ++I)
1277     Record.AddStmt(E->getSubExprs()[I]);
1278   Record.AddSourceLocation(E->getBuiltinLoc());
1279   Record.AddSourceLocation(E->getRParenLoc());
1280   Code = serialization::EXPR_ATOMIC;
1281 }
1282
1283 //===----------------------------------------------------------------------===//
1284 // Objective-C Expressions and Statements.
1285 //===----------------------------------------------------------------------===//
1286
1287 void ASTStmtWriter::VisitObjCStringLiteral(ObjCStringLiteral *E) {
1288   VisitExpr(E);
1289   Record.AddStmt(E->getString());
1290   Record.AddSourceLocation(E->getAtLoc());
1291   Code = serialization::EXPR_OBJC_STRING_LITERAL;
1292 }
1293
1294 void ASTStmtWriter::VisitObjCBoxedExpr(ObjCBoxedExpr *E) {
1295   VisitExpr(E);
1296   Record.AddStmt(E->getSubExpr());
1297   Record.AddDeclRef(E->getBoxingMethod());
1298   Record.AddSourceRange(E->getSourceRange());
1299   Code = serialization::EXPR_OBJC_BOXED_EXPRESSION;
1300 }
1301
1302 void ASTStmtWriter::VisitObjCArrayLiteral(ObjCArrayLiteral *E) {
1303   VisitExpr(E);
1304   Record.push_back(E->getNumElements());
1305   for (unsigned i = 0; i < E->getNumElements(); i++)
1306     Record.AddStmt(E->getElement(i));
1307   Record.AddDeclRef(E->getArrayWithObjectsMethod());
1308   Record.AddSourceRange(E->getSourceRange());
1309   Code = serialization::EXPR_OBJC_ARRAY_LITERAL;
1310 }
1311
1312 void ASTStmtWriter::VisitObjCDictionaryLiteral(ObjCDictionaryLiteral *E) {
1313   VisitExpr(E);
1314   Record.push_back(E->getNumElements());
1315   Record.push_back(E->HasPackExpansions);
1316   for (unsigned i = 0; i < E->getNumElements(); i++) {
1317     ObjCDictionaryElement Element = E->getKeyValueElement(i);
1318     Record.AddStmt(Element.Key);
1319     Record.AddStmt(Element.Value);
1320     if (E->HasPackExpansions) {
1321       Record.AddSourceLocation(Element.EllipsisLoc);
1322       unsigned NumExpansions = 0;
1323       if (Element.NumExpansions)
1324         NumExpansions = *Element.NumExpansions + 1;
1325       Record.push_back(NumExpansions);
1326     }
1327   }
1328
1329   Record.AddDeclRef(E->getDictWithObjectsMethod());
1330   Record.AddSourceRange(E->getSourceRange());
1331   Code = serialization::EXPR_OBJC_DICTIONARY_LITERAL;
1332 }
1333
1334 void ASTStmtWriter::VisitObjCEncodeExpr(ObjCEncodeExpr *E) {
1335   VisitExpr(E);
1336   Record.AddTypeSourceInfo(E->getEncodedTypeSourceInfo());
1337   Record.AddSourceLocation(E->getAtLoc());
1338   Record.AddSourceLocation(E->getRParenLoc());
1339   Code = serialization::EXPR_OBJC_ENCODE;
1340 }
1341
1342 void ASTStmtWriter::VisitObjCSelectorExpr(ObjCSelectorExpr *E) {
1343   VisitExpr(E);
1344   Record.AddSelectorRef(E->getSelector());
1345   Record.AddSourceLocation(E->getAtLoc());
1346   Record.AddSourceLocation(E->getRParenLoc());
1347   Code = serialization::EXPR_OBJC_SELECTOR_EXPR;
1348 }
1349
1350 void ASTStmtWriter::VisitObjCProtocolExpr(ObjCProtocolExpr *E) {
1351   VisitExpr(E);
1352   Record.AddDeclRef(E->getProtocol());
1353   Record.AddSourceLocation(E->getAtLoc());
1354   Record.AddSourceLocation(E->ProtoLoc);
1355   Record.AddSourceLocation(E->getRParenLoc());
1356   Code = serialization::EXPR_OBJC_PROTOCOL_EXPR;
1357 }
1358
1359 void ASTStmtWriter::VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) {
1360   VisitExpr(E);
1361   Record.AddDeclRef(E->getDecl());
1362   Record.AddSourceLocation(E->getLocation());
1363   Record.AddSourceLocation(E->getOpLoc());
1364   Record.AddStmt(E->getBase());
1365   Record.push_back(E->isArrow());
1366   Record.push_back(E->isFreeIvar());
1367   Code = serialization::EXPR_OBJC_IVAR_REF_EXPR;
1368 }
1369
1370 void ASTStmtWriter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) {
1371   VisitExpr(E);
1372   Record.push_back(E->SetterAndMethodRefFlags.getInt());
1373   Record.push_back(E->isImplicitProperty());
1374   if (E->isImplicitProperty()) {
1375     Record.AddDeclRef(E->getImplicitPropertyGetter());
1376     Record.AddDeclRef(E->getImplicitPropertySetter());
1377   } else {
1378     Record.AddDeclRef(E->getExplicitProperty());
1379   }
1380   Record.AddSourceLocation(E->getLocation());
1381   Record.AddSourceLocation(E->getReceiverLocation());
1382   if (E->isObjectReceiver()) {
1383     Record.push_back(0);
1384     Record.AddStmt(E->getBase());
1385   } else if (E->isSuperReceiver()) {
1386     Record.push_back(1);
1387     Record.AddTypeRef(E->getSuperReceiverType());
1388   } else {
1389     Record.push_back(2);
1390     Record.AddDeclRef(E->getClassReceiver());
1391   }
1392
1393   Code = serialization::EXPR_OBJC_PROPERTY_REF_EXPR;
1394 }
1395
1396 void ASTStmtWriter::VisitObjCSubscriptRefExpr(ObjCSubscriptRefExpr *E) {
1397   VisitExpr(E);
1398   Record.AddSourceLocation(E->getRBracket());
1399   Record.AddStmt(E->getBaseExpr());
1400   Record.AddStmt(E->getKeyExpr());
1401   Record.AddDeclRef(E->getAtIndexMethodDecl());
1402   Record.AddDeclRef(E->setAtIndexMethodDecl());
1403
1404   Code = serialization::EXPR_OBJC_SUBSCRIPT_REF_EXPR;
1405 }
1406
1407 void ASTStmtWriter::VisitObjCMessageExpr(ObjCMessageExpr *E) {
1408   VisitExpr(E);
1409   Record.push_back(E->getNumArgs());
1410   Record.push_back(E->getNumStoredSelLocs());
1411   Record.push_back(E->SelLocsKind);
1412   Record.push_back(E->isDelegateInitCall());
1413   Record.push_back(E->IsImplicit);
1414   Record.push_back((unsigned)E->getReceiverKind()); // FIXME: stable encoding
1415   switch (E->getReceiverKind()) {
1416   case ObjCMessageExpr::Instance:
1417     Record.AddStmt(E->getInstanceReceiver());
1418     break;
1419
1420   case ObjCMessageExpr::Class:
1421     Record.AddTypeSourceInfo(E->getClassReceiverTypeInfo());
1422     break;
1423
1424   case ObjCMessageExpr::SuperClass:
1425   case ObjCMessageExpr::SuperInstance:
1426     Record.AddTypeRef(E->getSuperType());
1427     Record.AddSourceLocation(E->getSuperLoc());
1428     break;
1429   }
1430
1431   if (E->getMethodDecl()) {
1432     Record.push_back(1);
1433     Record.AddDeclRef(E->getMethodDecl());
1434   } else {
1435     Record.push_back(0);
1436     Record.AddSelectorRef(E->getSelector());
1437   }
1438
1439   Record.AddSourceLocation(E->getLeftLoc());
1440   Record.AddSourceLocation(E->getRightLoc());
1441
1442   for (CallExpr::arg_iterator Arg = E->arg_begin(), ArgEnd = E->arg_end();
1443        Arg != ArgEnd; ++Arg)
1444     Record.AddStmt(*Arg);
1445
1446   SourceLocation *Locs = E->getStoredSelLocs();
1447   for (unsigned i = 0, e = E->getNumStoredSelLocs(); i != e; ++i)
1448     Record.AddSourceLocation(Locs[i]);
1449
1450   Code = serialization::EXPR_OBJC_MESSAGE_EXPR;
1451 }
1452
1453 void ASTStmtWriter::VisitObjCForCollectionStmt(ObjCForCollectionStmt *S) {
1454   VisitStmt(S);
1455   Record.AddStmt(S->getElement());
1456   Record.AddStmt(S->getCollection());
1457   Record.AddStmt(S->getBody());
1458   Record.AddSourceLocation(S->getForLoc());
1459   Record.AddSourceLocation(S->getRParenLoc());
1460   Code = serialization::STMT_OBJC_FOR_COLLECTION;
1461 }
1462
1463 void ASTStmtWriter::VisitObjCAtCatchStmt(ObjCAtCatchStmt *S) {
1464   VisitStmt(S);
1465   Record.AddStmt(S->getCatchBody());
1466   Record.AddDeclRef(S->getCatchParamDecl());
1467   Record.AddSourceLocation(S->getAtCatchLoc());
1468   Record.AddSourceLocation(S->getRParenLoc());
1469   Code = serialization::STMT_OBJC_CATCH;
1470 }
1471
1472 void ASTStmtWriter::VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *S) {
1473   VisitStmt(S);
1474   Record.AddStmt(S->getFinallyBody());
1475   Record.AddSourceLocation(S->getAtFinallyLoc());
1476   Code = serialization::STMT_OBJC_FINALLY;
1477 }
1478
1479 void ASTStmtWriter::VisitObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S) {
1480   VisitStmt(S); // FIXME: no test coverage.
1481   Record.AddStmt(S->getSubStmt());
1482   Record.AddSourceLocation(S->getAtLoc());
1483   Code = serialization::STMT_OBJC_AUTORELEASE_POOL;
1484 }
1485
1486 void ASTStmtWriter::VisitObjCAtTryStmt(ObjCAtTryStmt *S) {
1487   VisitStmt(S);
1488   Record.push_back(S->getNumCatchStmts());
1489   Record.push_back(S->getFinallyStmt() != nullptr);
1490   Record.AddStmt(S->getTryBody());
1491   for (ObjCAtCatchStmt *C : S->catch_stmts())
1492     Record.AddStmt(C);
1493   if (S->getFinallyStmt())
1494     Record.AddStmt(S->getFinallyStmt());
1495   Record.AddSourceLocation(S->getAtTryLoc());
1496   Code = serialization::STMT_OBJC_AT_TRY;
1497 }
1498
1499 void ASTStmtWriter::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
1500   VisitStmt(S); // FIXME: no test coverage.
1501   Record.AddStmt(S->getSynchExpr());
1502   Record.AddStmt(S->getSynchBody());
1503   Record.AddSourceLocation(S->getAtSynchronizedLoc());
1504   Code = serialization::STMT_OBJC_AT_SYNCHRONIZED;
1505 }
1506
1507 void ASTStmtWriter::VisitObjCAtThrowStmt(ObjCAtThrowStmt *S) {
1508   VisitStmt(S); // FIXME: no test coverage.
1509   Record.AddStmt(S->getThrowExpr());
1510   Record.AddSourceLocation(S->getThrowLoc());
1511   Code = serialization::STMT_OBJC_AT_THROW;
1512 }
1513
1514 void ASTStmtWriter::VisitObjCBoolLiteralExpr(ObjCBoolLiteralExpr *E) {
1515   VisitExpr(E);
1516   Record.push_back(E->getValue());
1517   Record.AddSourceLocation(E->getLocation());
1518   Code = serialization::EXPR_OBJC_BOOL_LITERAL;
1519 }
1520
1521 void ASTStmtWriter::VisitObjCAvailabilityCheckExpr(ObjCAvailabilityCheckExpr *E) {
1522   VisitExpr(E);
1523   Record.AddSourceRange(E->getSourceRange());
1524   Record.AddVersionTuple(E->getVersion());
1525   Code = serialization::EXPR_OBJC_AVAILABILITY_CHECK;
1526 }
1527
1528 //===----------------------------------------------------------------------===//
1529 // C++ Expressions and Statements.
1530 //===----------------------------------------------------------------------===//
1531
1532 void ASTStmtWriter::VisitCXXCatchStmt(CXXCatchStmt *S) {
1533   VisitStmt(S);
1534   Record.AddSourceLocation(S->getCatchLoc());
1535   Record.AddDeclRef(S->getExceptionDecl());
1536   Record.AddStmt(S->getHandlerBlock());
1537   Code = serialization::STMT_CXX_CATCH;
1538 }
1539
1540 void ASTStmtWriter::VisitCXXTryStmt(CXXTryStmt *S) {
1541   VisitStmt(S);
1542   Record.push_back(S->getNumHandlers());
1543   Record.AddSourceLocation(S->getTryLoc());
1544   Record.AddStmt(S->getTryBlock());
1545   for (unsigned i = 0, e = S->getNumHandlers(); i != e; ++i)
1546     Record.AddStmt(S->getHandler(i));
1547   Code = serialization::STMT_CXX_TRY;
1548 }
1549
1550 void ASTStmtWriter::VisitCXXForRangeStmt(CXXForRangeStmt *S) {
1551   VisitStmt(S);
1552   Record.AddSourceLocation(S->getForLoc());
1553   Record.AddSourceLocation(S->getCoawaitLoc());
1554   Record.AddSourceLocation(S->getColonLoc());
1555   Record.AddSourceLocation(S->getRParenLoc());
1556   Record.AddStmt(S->getInit());
1557   Record.AddStmt(S->getRangeStmt());
1558   Record.AddStmt(S->getBeginStmt());
1559   Record.AddStmt(S->getEndStmt());
1560   Record.AddStmt(S->getCond());
1561   Record.AddStmt(S->getInc());
1562   Record.AddStmt(S->getLoopVarStmt());
1563   Record.AddStmt(S->getBody());
1564   Code = serialization::STMT_CXX_FOR_RANGE;
1565 }
1566
1567 void ASTStmtWriter::VisitMSDependentExistsStmt(MSDependentExistsStmt *S) {
1568   VisitStmt(S);
1569   Record.AddSourceLocation(S->getKeywordLoc());
1570   Record.push_back(S->isIfExists());
1571   Record.AddNestedNameSpecifierLoc(S->getQualifierLoc());
1572   Record.AddDeclarationNameInfo(S->getNameInfo());
1573   Record.AddStmt(S->getSubStmt());
1574   Code = serialization::STMT_MS_DEPENDENT_EXISTS;
1575 }
1576
1577 void ASTStmtWriter::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *E) {
1578   VisitCallExpr(E);
1579   Record.push_back(E->getOperator());
1580   Record.AddSourceRange(E->Range);
1581   Code = serialization::EXPR_CXX_OPERATOR_CALL;
1582 }
1583
1584 void ASTStmtWriter::VisitCXXMemberCallExpr(CXXMemberCallExpr *E) {
1585   VisitCallExpr(E);
1586   Code = serialization::EXPR_CXX_MEMBER_CALL;
1587 }
1588
1589 void ASTStmtWriter::VisitCXXRewrittenBinaryOperator(
1590     CXXRewrittenBinaryOperator *E) {
1591   VisitExpr(E);
1592   Record.push_back(E->isReversed());
1593   Record.AddStmt(E->getSemanticForm());
1594   Code = serialization::EXPR_CXX_REWRITTEN_BINARY_OPERATOR;
1595 }
1596
1597 void ASTStmtWriter::VisitCXXConstructExpr(CXXConstructExpr *E) {
1598   VisitExpr(E);
1599
1600   Record.push_back(E->getNumArgs());
1601   Record.push_back(E->isElidable());
1602   Record.push_back(E->hadMultipleCandidates());
1603   Record.push_back(E->isListInitialization());
1604   Record.push_back(E->isStdInitListInitialization());
1605   Record.push_back(E->requiresZeroInitialization());
1606   Record.push_back(E->getConstructionKind()); // FIXME: stable encoding
1607   Record.push_back(E->isImmediateEscalating());
1608   Record.AddSourceLocation(E->getLocation());
1609   Record.AddDeclRef(E->getConstructor());
1610   Record.AddSourceRange(E->getParenOrBraceRange());
1611
1612   for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
1613     Record.AddStmt(E->getArg(I));
1614
1615   Code = serialization::EXPR_CXX_CONSTRUCT;
1616 }
1617
1618 void ASTStmtWriter::VisitCXXInheritedCtorInitExpr(CXXInheritedCtorInitExpr *E) {
1619   VisitExpr(E);
1620   Record.AddDeclRef(E->getConstructor());
1621   Record.AddSourceLocation(E->getLocation());
1622   Record.push_back(E->constructsVBase());
1623   Record.push_back(E->inheritedFromVBase());
1624   Code = serialization::EXPR_CXX_INHERITED_CTOR_INIT;
1625 }
1626
1627 void ASTStmtWriter::VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *E) {
1628   VisitCXXConstructExpr(E);
1629   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1630   Code = serialization::EXPR_CXX_TEMPORARY_OBJECT;
1631 }
1632
1633 void ASTStmtWriter::VisitLambdaExpr(LambdaExpr *E) {
1634   VisitExpr(E);
1635   Record.push_back(E->LambdaExprBits.NumCaptures);
1636   Record.AddSourceRange(E->IntroducerRange);
1637   Record.push_back(E->LambdaExprBits.CaptureDefault); // FIXME: stable encoding
1638   Record.AddSourceLocation(E->CaptureDefaultLoc);
1639   Record.push_back(E->LambdaExprBits.ExplicitParams);
1640   Record.push_back(E->LambdaExprBits.ExplicitResultType);
1641   Record.AddSourceLocation(E->ClosingBrace);
1642
1643   // Add capture initializers.
1644   for (LambdaExpr::capture_init_iterator C = E->capture_init_begin(),
1645                                       CEnd = E->capture_init_end();
1646        C != CEnd; ++C) {
1647     Record.AddStmt(*C);
1648   }
1649
1650   // Don't serialize the body. It belongs to the call operator declaration.
1651   // LambdaExpr only stores a copy of the Stmt *.
1652
1653   Code = serialization::EXPR_LAMBDA;
1654 }
1655
1656 void ASTStmtWriter::VisitCXXStdInitializerListExpr(CXXStdInitializerListExpr *E) {
1657   VisitExpr(E);
1658   Record.AddStmt(E->getSubExpr());
1659   Code = serialization::EXPR_CXX_STD_INITIALIZER_LIST;
1660 }
1661
1662 void ASTStmtWriter::VisitCXXNamedCastExpr(CXXNamedCastExpr *E) {
1663   VisitExplicitCastExpr(E);
1664   Record.AddSourceRange(SourceRange(E->getOperatorLoc(), E->getRParenLoc()));
1665   Record.AddSourceRange(E->getAngleBrackets());
1666 }
1667
1668 void ASTStmtWriter::VisitCXXStaticCastExpr(CXXStaticCastExpr *E) {
1669   VisitCXXNamedCastExpr(E);
1670   Code = serialization::EXPR_CXX_STATIC_CAST;
1671 }
1672
1673 void ASTStmtWriter::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *E) {
1674   VisitCXXNamedCastExpr(E);
1675   Code = serialization::EXPR_CXX_DYNAMIC_CAST;
1676 }
1677
1678 void ASTStmtWriter::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *E) {
1679   VisitCXXNamedCastExpr(E);
1680   Code = serialization::EXPR_CXX_REINTERPRET_CAST;
1681 }
1682
1683 void ASTStmtWriter::VisitCXXConstCastExpr(CXXConstCastExpr *E) {
1684   VisitCXXNamedCastExpr(E);
1685   Code = serialization::EXPR_CXX_CONST_CAST;
1686 }
1687
1688 void ASTStmtWriter::VisitCXXAddrspaceCastExpr(CXXAddrspaceCastExpr *E) {
1689   VisitCXXNamedCastExpr(E);
1690   Code = serialization::EXPR_CXX_ADDRSPACE_CAST;
1691 }
1692
1693 void ASTStmtWriter::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *E) {
1694   VisitExplicitCastExpr(E);
1695   Record.AddSourceLocation(E->getLParenLoc());
1696   Record.AddSourceLocation(E->getRParenLoc());
1697   Code = serialization::EXPR_CXX_FUNCTIONAL_CAST;
1698 }
1699
1700 void ASTStmtWriter::VisitBuiltinBitCastExpr(BuiltinBitCastExpr *E) {
1701   VisitExplicitCastExpr(E);
1702   Record.AddSourceLocation(E->getBeginLoc());
1703   Record.AddSourceLocation(E->getEndLoc());
1704   Code = serialization::EXPR_BUILTIN_BIT_CAST;
1705 }
1706
1707 void ASTStmtWriter::VisitUserDefinedLiteral(UserDefinedLiteral *E) {
1708   VisitCallExpr(E);
1709   Record.AddSourceLocation(E->UDSuffixLoc);
1710   Code = serialization::EXPR_USER_DEFINED_LITERAL;
1711 }
1712
1713 void ASTStmtWriter::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *E) {
1714   VisitExpr(E);
1715   Record.push_back(E->getValue());
1716   Record.AddSourceLocation(E->getLocation());
1717   Code = serialization::EXPR_CXX_BOOL_LITERAL;
1718 }
1719
1720 void ASTStmtWriter::VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *E) {
1721   VisitExpr(E);
1722   Record.AddSourceLocation(E->getLocation());
1723   Code = serialization::EXPR_CXX_NULL_PTR_LITERAL;
1724 }
1725
1726 void ASTStmtWriter::VisitCXXTypeidExpr(CXXTypeidExpr *E) {
1727   VisitExpr(E);
1728   Record.AddSourceRange(E->getSourceRange());
1729   if (E->isTypeOperand()) {
1730     Record.AddTypeSourceInfo(E->getTypeOperandSourceInfo());
1731     Code = serialization::EXPR_CXX_TYPEID_TYPE;
1732   } else {
1733     Record.AddStmt(E->getExprOperand());
1734     Code = serialization::EXPR_CXX_TYPEID_EXPR;
1735   }
1736 }
1737
1738 void ASTStmtWriter::VisitCXXThisExpr(CXXThisExpr *E) {
1739   VisitExpr(E);
1740   Record.AddSourceLocation(E->getLocation());
1741   Record.push_back(E->isImplicit());
1742   Code = serialization::EXPR_CXX_THIS;
1743 }
1744
1745 void ASTStmtWriter::VisitCXXThrowExpr(CXXThrowExpr *E) {
1746   VisitExpr(E);
1747   Record.AddSourceLocation(E->getThrowLoc());
1748   Record.AddStmt(E->getSubExpr());
1749   Record.push_back(E->isThrownVariableInScope());
1750   Code = serialization::EXPR_CXX_THROW;
1751 }
1752
1753 void ASTStmtWriter::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *E) {
1754   VisitExpr(E);
1755   Record.AddDeclRef(E->getParam());
1756   Record.AddDeclRef(cast_or_null<Decl>(E->getUsedContext()));
1757   Record.AddSourceLocation(E->getUsedLocation());
1758   Record.push_back(E->hasRewrittenInit());
1759   if (E->hasRewrittenInit())
1760     Record.AddStmt(E->getRewrittenExpr());
1761   Code = serialization::EXPR_CXX_DEFAULT_ARG;
1762 }
1763
1764 void ASTStmtWriter::VisitCXXDefaultInitExpr(CXXDefaultInitExpr *E) {
1765   VisitExpr(E);
1766   Record.push_back(E->hasRewrittenInit());
1767   Record.AddDeclRef(E->getField());
1768   Record.AddDeclRef(cast_or_null<Decl>(E->getUsedContext()));
1769   Record.AddSourceLocation(E->getExprLoc());
1770   if (E->hasRewrittenInit())
1771     Record.AddStmt(E->getRewrittenExpr());
1772   Code = serialization::EXPR_CXX_DEFAULT_INIT;
1773 }
1774
1775 void ASTStmtWriter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) {
1776   VisitExpr(E);
1777   Record.AddCXXTemporary(E->getTemporary());
1778   Record.AddStmt(E->getSubExpr());
1779   Code = serialization::EXPR_CXX_BIND_TEMPORARY;
1780 }
1781
1782 void ASTStmtWriter::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) {
1783   VisitExpr(E);
1784   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1785   Record.AddSourceLocation(E->getRParenLoc());
1786   Code = serialization::EXPR_CXX_SCALAR_VALUE_INIT;
1787 }
1788
1789 void ASTStmtWriter::VisitCXXNewExpr(CXXNewExpr *E) {
1790   VisitExpr(E);
1791
1792   Record.push_back(E->isArray());
1793   Record.push_back(E->hasInitializer());
1794   Record.push_back(E->getNumPlacementArgs());
1795   Record.push_back(E->isParenTypeId());
1796
1797   Record.push_back(E->isGlobalNew());
1798   Record.push_back(E->passAlignment());
1799   Record.push_back(E->doesUsualArrayDeleteWantSize());
1800   Record.push_back(E->CXXNewExprBits.StoredInitializationStyle);
1801
1802   Record.AddDeclRef(E->getOperatorNew());
1803   Record.AddDeclRef(E->getOperatorDelete());
1804   Record.AddTypeSourceInfo(E->getAllocatedTypeSourceInfo());
1805   if (E->isParenTypeId())
1806     Record.AddSourceRange(E->getTypeIdParens());
1807   Record.AddSourceRange(E->getSourceRange());
1808   Record.AddSourceRange(E->getDirectInitRange());
1809
1810   for (CXXNewExpr::arg_iterator I = E->raw_arg_begin(), N = E->raw_arg_end();
1811        I != N; ++I)
1812     Record.AddStmt(*I);
1813
1814   Code = serialization::EXPR_CXX_NEW;
1815 }
1816
1817 void ASTStmtWriter::VisitCXXDeleteExpr(CXXDeleteExpr *E) {
1818   VisitExpr(E);
1819   Record.push_back(E->isGlobalDelete());
1820   Record.push_back(E->isArrayForm());
1821   Record.push_back(E->isArrayFormAsWritten());
1822   Record.push_back(E->doesUsualArrayDeleteWantSize());
1823   Record.AddDeclRef(E->getOperatorDelete());
1824   Record.AddStmt(E->getArgument());
1825   Record.AddSourceLocation(E->getBeginLoc());
1826
1827   Code = serialization::EXPR_CXX_DELETE;
1828 }
1829
1830 void ASTStmtWriter::VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E) {
1831   VisitExpr(E);
1832
1833   Record.AddStmt(E->getBase());
1834   Record.push_back(E->isArrow());
1835   Record.AddSourceLocation(E->getOperatorLoc());
1836   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1837   Record.AddTypeSourceInfo(E->getScopeTypeInfo());
1838   Record.AddSourceLocation(E->getColonColonLoc());
1839   Record.AddSourceLocation(E->getTildeLoc());
1840
1841   // PseudoDestructorTypeStorage.
1842   Record.AddIdentifierRef(E->getDestroyedTypeIdentifier());
1843   if (E->getDestroyedTypeIdentifier())
1844     Record.AddSourceLocation(E->getDestroyedTypeLoc());
1845   else
1846     Record.AddTypeSourceInfo(E->getDestroyedTypeInfo());
1847
1848   Code = serialization::EXPR_CXX_PSEUDO_DESTRUCTOR;
1849 }
1850
1851 void ASTStmtWriter::VisitExprWithCleanups(ExprWithCleanups *E) {
1852   VisitExpr(E);
1853   Record.push_back(E->getNumObjects());
1854   for (auto &Obj : E->getObjects()) {
1855     if (auto *BD = Obj.dyn_cast<BlockDecl *>()) {
1856       Record.push_back(serialization::COK_Block);
1857       Record.AddDeclRef(BD);
1858     } else if (auto *CLE = Obj.dyn_cast<CompoundLiteralExpr *>()) {
1859       Record.push_back(serialization::COK_CompoundLiteral);
1860       Record.AddStmt(CLE);
1861     }
1862   }
1863
1864   Record.push_back(E->cleanupsHaveSideEffects());
1865   Record.AddStmt(E->getSubExpr());
1866   Code = serialization::EXPR_EXPR_WITH_CLEANUPS;
1867 }
1868
1869 void ASTStmtWriter::VisitCXXDependentScopeMemberExpr(
1870     CXXDependentScopeMemberExpr *E) {
1871   VisitExpr(E);
1872
1873   // Don't emit anything here (or if you do you will have to update
1874   // the corresponding deserialization function).
1875
1876   Record.push_back(E->hasTemplateKWAndArgsInfo());
1877   Record.push_back(E->getNumTemplateArgs());
1878   Record.push_back(E->hasFirstQualifierFoundInScope());
1879
1880   if (E->hasTemplateKWAndArgsInfo()) {
1881     const ASTTemplateKWAndArgsInfo &ArgInfo =
1882         *E->getTrailingObjects<ASTTemplateKWAndArgsInfo>();
1883     AddTemplateKWAndArgsInfo(ArgInfo,
1884                              E->getTrailingObjects<TemplateArgumentLoc>());
1885   }
1886
1887   Record.push_back(E->isArrow());
1888   Record.AddSourceLocation(E->getOperatorLoc());
1889   Record.AddTypeRef(E->getBaseType());
1890   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1891   if (!E->isImplicitAccess())
1892     Record.AddStmt(E->getBase());
1893   else
1894     Record.AddStmt(nullptr);
1895
1896   if (E->hasFirstQualifierFoundInScope())
1897     Record.AddDeclRef(E->getFirstQualifierFoundInScope());
1898
1899   Record.AddDeclarationNameInfo(E->MemberNameInfo);
1900   Code = serialization::EXPR_CXX_DEPENDENT_SCOPE_MEMBER;
1901 }
1902
1903 void
1904 ASTStmtWriter::VisitDependentScopeDeclRefExpr(DependentScopeDeclRefExpr *E) {
1905   VisitExpr(E);
1906
1907   // Don't emit anything here, HasTemplateKWAndArgsInfo must be
1908   // emitted first.
1909
1910   Record.push_back(E->DependentScopeDeclRefExprBits.HasTemplateKWAndArgsInfo);
1911   if (E->DependentScopeDeclRefExprBits.HasTemplateKWAndArgsInfo) {
1912     const ASTTemplateKWAndArgsInfo &ArgInfo =
1913         *E->getTrailingObjects<ASTTemplateKWAndArgsInfo>();
1914     Record.push_back(ArgInfo.NumTemplateArgs);
1915     AddTemplateKWAndArgsInfo(ArgInfo,
1916                              E->getTrailingObjects<TemplateArgumentLoc>());
1917   }
1918
1919   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1920   Record.AddDeclarationNameInfo(E->NameInfo);
1921   Code = serialization::EXPR_CXX_DEPENDENT_SCOPE_DECL_REF;
1922 }
1923
1924 void
1925 ASTStmtWriter::VisitCXXUnresolvedConstructExpr(CXXUnresolvedConstructExpr *E) {
1926   VisitExpr(E);
1927   Record.push_back(E->getNumArgs());
1928   for (CXXUnresolvedConstructExpr::arg_iterator
1929          ArgI = E->arg_begin(), ArgE = E->arg_end(); ArgI != ArgE; ++ArgI)
1930     Record.AddStmt(*ArgI);
1931   Record.AddTypeSourceInfo(E->getTypeSourceInfo());
1932   Record.AddSourceLocation(E->getLParenLoc());
1933   Record.AddSourceLocation(E->getRParenLoc());
1934   Record.push_back(E->isListInitialization());
1935   Code = serialization::EXPR_CXX_UNRESOLVED_CONSTRUCT;
1936 }
1937
1938 void ASTStmtWriter::VisitOverloadExpr(OverloadExpr *E) {
1939   VisitExpr(E);
1940
1941   Record.push_back(E->getNumDecls());
1942   Record.push_back(E->hasTemplateKWAndArgsInfo());
1943   if (E->hasTemplateKWAndArgsInfo()) {
1944     const ASTTemplateKWAndArgsInfo &ArgInfo =
1945         *E->getTrailingASTTemplateKWAndArgsInfo();
1946     Record.push_back(ArgInfo.NumTemplateArgs);
1947     AddTemplateKWAndArgsInfo(ArgInfo, E->getTrailingTemplateArgumentLoc());
1948   }
1949
1950   for (OverloadExpr::decls_iterator OvI = E->decls_begin(),
1951                                     OvE = E->decls_end();
1952        OvI != OvE; ++OvI) {
1953     Record.AddDeclRef(OvI.getDecl());
1954     Record.push_back(OvI.getAccess());
1955   }
1956
1957   Record.AddDeclarationNameInfo(E->getNameInfo());
1958   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
1959 }
1960
1961 void ASTStmtWriter::VisitUnresolvedMemberExpr(UnresolvedMemberExpr *E) {
1962   VisitOverloadExpr(E);
1963   Record.push_back(E->isArrow());
1964   Record.push_back(E->hasUnresolvedUsing());
1965   Record.AddStmt(!E->isImplicitAccess() ? E->getBase() : nullptr);
1966   Record.AddTypeRef(E->getBaseType());
1967   Record.AddSourceLocation(E->getOperatorLoc());
1968   Code = serialization::EXPR_CXX_UNRESOLVED_MEMBER;
1969 }
1970
1971 void ASTStmtWriter::VisitUnresolvedLookupExpr(UnresolvedLookupExpr *E) {
1972   VisitOverloadExpr(E);
1973   Record.push_back(E->requiresADL());
1974   Record.push_back(E->isOverloaded());
1975   Record.AddDeclRef(E->getNamingClass());
1976   Code = serialization::EXPR_CXX_UNRESOLVED_LOOKUP;
1977 }
1978
1979 void ASTStmtWriter::VisitTypeTraitExpr(TypeTraitExpr *E) {
1980   VisitExpr(E);
1981   Record.push_back(E->TypeTraitExprBits.NumArgs);
1982   Record.push_back(E->TypeTraitExprBits.Kind); // FIXME: Stable encoding
1983   Record.push_back(E->TypeTraitExprBits.Value);
1984   Record.AddSourceRange(E->getSourceRange());
1985   for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
1986     Record.AddTypeSourceInfo(E->getArg(I));
1987   Code = serialization::EXPR_TYPE_TRAIT;
1988 }
1989
1990 void ASTStmtWriter::VisitArrayTypeTraitExpr(ArrayTypeTraitExpr *E) {
1991   VisitExpr(E);
1992   Record.push_back(E->getTrait());
1993   Record.push_back(E->getValue());
1994   Record.AddSourceRange(E->getSourceRange());
1995   Record.AddTypeSourceInfo(E->getQueriedTypeSourceInfo());
1996   Record.AddStmt(E->getDimensionExpression());
1997   Code = serialization::EXPR_ARRAY_TYPE_TRAIT;
1998 }
1999
2000 void ASTStmtWriter::VisitExpressionTraitExpr(ExpressionTraitExpr *E) {
2001   VisitExpr(E);
2002   Record.push_back(E->getTrait());
2003   Record.push_back(E->getValue());
2004   Record.AddSourceRange(E->getSourceRange());
2005   Record.AddStmt(E->getQueriedExpression());
2006   Code = serialization::EXPR_CXX_EXPRESSION_TRAIT;
2007 }
2008
2009 void ASTStmtWriter::VisitCXXNoexceptExpr(CXXNoexceptExpr *E) {
2010   VisitExpr(E);
2011   Record.push_back(E->getValue());
2012   Record.AddSourceRange(E->getSourceRange());
2013   Record.AddStmt(E->getOperand());
2014   Code = serialization::EXPR_CXX_NOEXCEPT;
2015 }
2016
2017 void ASTStmtWriter::VisitPackExpansionExpr(PackExpansionExpr *E) {
2018   VisitExpr(E);
2019   Record.AddSourceLocation(E->getEllipsisLoc());
2020   Record.push_back(E->NumExpansions);
2021   Record.AddStmt(E->getPattern());
2022   Code = serialization::EXPR_PACK_EXPANSION;
2023 }
2024
2025 void ASTStmtWriter::VisitSizeOfPackExpr(SizeOfPackExpr *E) {
2026   VisitExpr(E);
2027   Record.push_back(E->isPartiallySubstituted() ? E->getPartialArguments().size()
2028                                                : 0);
2029   Record.AddSourceLocation(E->OperatorLoc);
2030   Record.AddSourceLocation(E->PackLoc);
2031   Record.AddSourceLocation(E->RParenLoc);
2032   Record.AddDeclRef(E->Pack);
2033   if (E->isPartiallySubstituted()) {
2034     for (const auto &TA : E->getPartialArguments())
2035       Record.AddTemplateArgument(TA);
2036   } else if (!E->isValueDependent()) {
2037     Record.push_back(E->getPackLength());
2038   }
2039   Code = serialization::EXPR_SIZEOF_PACK;
2040 }
2041
2042 void ASTStmtWriter::VisitSubstNonTypeTemplateParmExpr(
2043                                               SubstNonTypeTemplateParmExpr *E) {
2044   VisitExpr(E);
2045   Record.AddDeclRef(E->getAssociatedDecl());
2046   Record.push_back(E->isReferenceParameter());
2047   Record.push_back(E->getIndex());
2048   if (auto PackIndex = E->getPackIndex())
2049     Record.push_back(*PackIndex + 1);
2050   else
2051     Record.push_back(0);
2052   Record.AddSourceLocation(E->getNameLoc());
2053   Record.AddStmt(E->getReplacement());
2054   Code = serialization::EXPR_SUBST_NON_TYPE_TEMPLATE_PARM;
2055 }
2056
2057 void ASTStmtWriter::VisitSubstNonTypeTemplateParmPackExpr(
2058                                           SubstNonTypeTemplateParmPackExpr *E) {
2059   VisitExpr(E);
2060   Record.AddDeclRef(E->getAssociatedDecl());
2061   Record.push_back(E->getIndex());
2062   Record.AddTemplateArgument(E->getArgumentPack());
2063   Record.AddSourceLocation(E->getParameterPackLocation());
2064   Code = serialization::EXPR_SUBST_NON_TYPE_TEMPLATE_PARM_PACK;
2065 }
2066
2067 void ASTStmtWriter::VisitFunctionParmPackExpr(FunctionParmPackExpr *E) {
2068   VisitExpr(E);
2069   Record.push_back(E->getNumExpansions());
2070   Record.AddDeclRef(E->getParameterPack());
2071   Record.AddSourceLocation(E->getParameterPackLocation());
2072   for (FunctionParmPackExpr::iterator I = E->begin(), End = E->end();
2073        I != End; ++I)
2074     Record.AddDeclRef(*I);
2075   Code = serialization::EXPR_FUNCTION_PARM_PACK;
2076 }
2077
2078 void ASTStmtWriter::VisitMaterializeTemporaryExpr(MaterializeTemporaryExpr *E) {
2079   VisitExpr(E);
2080   Record.push_back(static_cast<bool>(E->getLifetimeExtendedTemporaryDecl()));
2081   if (E->getLifetimeExtendedTemporaryDecl())
2082     Record.AddDeclRef(E->getLifetimeExtendedTemporaryDecl());
2083   else
2084     Record.AddStmt(E->getSubExpr());
2085   Code = serialization::EXPR_MATERIALIZE_TEMPORARY;
2086 }
2087
2088 void ASTStmtWriter::VisitCXXFoldExpr(CXXFoldExpr *E) {
2089   VisitExpr(E);
2090   Record.AddSourceLocation(E->LParenLoc);
2091   Record.AddSourceLocation(E->EllipsisLoc);
2092   Record.AddSourceLocation(E->RParenLoc);
2093   Record.push_back(E->NumExpansions);
2094   Record.AddStmt(E->SubExprs[0]);
2095   Record.AddStmt(E->SubExprs[1]);
2096   Record.AddStmt(E->SubExprs[2]);
2097   Record.push_back(E->Opcode);
2098   Code = serialization::EXPR_CXX_FOLD;
2099 }
2100
2101 void ASTStmtWriter::VisitCXXParenListInitExpr(CXXParenListInitExpr *E) {
2102   VisitExpr(E);
2103   ArrayRef<Expr *> InitExprs = E->getInitExprs();
2104   Record.push_back(InitExprs.size());
2105   Record.push_back(E->getUserSpecifiedInitExprs().size());
2106   Record.AddSourceLocation(E->getInitLoc());
2107   Record.AddSourceLocation(E->getBeginLoc());
2108   Record.AddSourceLocation(E->getEndLoc());
2109   for (Expr *InitExpr : E->getInitExprs())
2110     Record.AddStmt(InitExpr);
2111   Expr *ArrayFiller = E->getArrayFiller();
2112   FieldDecl *UnionField = E->getInitializedFieldInUnion();
2113   bool HasArrayFillerOrUnionDecl = ArrayFiller || UnionField;
2114   Record.push_back(HasArrayFillerOrUnionDecl);
2115   if (HasArrayFillerOrUnionDecl) {
2116     Record.push_back(static_cast<bool>(ArrayFiller));
2117     if (ArrayFiller)
2118       Record.AddStmt(ArrayFiller);
2119     else
2120       Record.AddDeclRef(UnionField);
2121   }
2122   Code = serialization::EXPR_CXX_PAREN_LIST_INIT;
2123 }
2124
2125 void ASTStmtWriter::VisitOpaqueValueExpr(OpaqueValueExpr *E) {
2126   VisitExpr(E);
2127   Record.AddStmt(E->getSourceExpr());
2128   Record.AddSourceLocation(E->getLocation());
2129   Record.push_back(E->isUnique());
2130   Code = serialization::EXPR_OPAQUE_VALUE;
2131 }
2132
2133 void ASTStmtWriter::VisitTypoExpr(TypoExpr *E) {
2134   VisitExpr(E);
2135   // TODO: Figure out sane writer behavior for a TypoExpr, if necessary
2136   llvm_unreachable("Cannot write TypoExpr nodes");
2137 }
2138
2139 //===----------------------------------------------------------------------===//
2140 // CUDA Expressions and Statements.
2141 //===----------------------------------------------------------------------===//
2142
2143 void ASTStmtWriter::VisitCUDAKernelCallExpr(CUDAKernelCallExpr *E) {
2144   VisitCallExpr(E);
2145   Record.AddStmt(E->getConfig());
2146   Code = serialization::EXPR_CUDA_KERNEL_CALL;
2147 }
2148
2149 //===----------------------------------------------------------------------===//
2150 // OpenCL Expressions and Statements.
2151 //===----------------------------------------------------------------------===//
2152 void ASTStmtWriter::VisitAsTypeExpr(AsTypeExpr *E) {
2153   VisitExpr(E);
2154   Record.AddSourceLocation(E->getBuiltinLoc());
2155   Record.AddSourceLocation(E->getRParenLoc());
2156   Record.AddStmt(E->getSrcExpr());
2157   Code = serialization::EXPR_ASTYPE;
2158 }
2159
2160 //===----------------------------------------------------------------------===//
2161 // Microsoft Expressions and Statements.
2162 //===----------------------------------------------------------------------===//
2163 void ASTStmtWriter::VisitMSPropertyRefExpr(MSPropertyRefExpr *E) {
2164   VisitExpr(E);
2165   Record.push_back(E->isArrow());
2166   Record.AddStmt(E->getBaseExpr());
2167   Record.AddNestedNameSpecifierLoc(E->getQualifierLoc());
2168   Record.AddSourceLocation(E->getMemberLoc());
2169   Record.AddDeclRef(E->getPropertyDecl());
2170   Code = serialization::EXPR_CXX_PROPERTY_REF_EXPR;
2171 }
2172
2173 void ASTStmtWriter::VisitMSPropertySubscriptExpr(MSPropertySubscriptExpr *E) {
2174   VisitExpr(E);
2175   Record.AddStmt(E->getBase());
2176   Record.AddStmt(E->getIdx());
2177   Record.AddSourceLocation(E->getRBracketLoc());
2178   Code = serialization::EXPR_CXX_PROPERTY_SUBSCRIPT_EXPR;
2179 }
2180
2181 void ASTStmtWriter::VisitCXXUuidofExpr(CXXUuidofExpr *E) {
2182   VisitExpr(E);
2183   Record.AddSourceRange(E->getSourceRange());
2184   Record.AddDeclRef(E->getGuidDecl());
2185   if (E->isTypeOperand()) {
2186     Record.AddTypeSourceInfo(E->getTypeOperandSourceInfo());
2187     Code = serialization::EXPR_CXX_UUIDOF_TYPE;
2188   } else {
2189     Record.AddStmt(E->getExprOperand());
2190     Code = serialization::EXPR_CXX_UUIDOF_EXPR;
2191   }
2192 }
2193
2194 void ASTStmtWriter::VisitSEHExceptStmt(SEHExceptStmt *S) {
2195   VisitStmt(S);
2196   Record.AddSourceLocation(S->getExceptLoc());
2197   Record.AddStmt(S->getFilterExpr());
2198   Record.AddStmt(S->getBlock());
2199   Code = serialization::STMT_SEH_EXCEPT;
2200 }
2201
2202 void ASTStmtWriter::VisitSEHFinallyStmt(SEHFinallyStmt *S) {
2203   VisitStmt(S);
2204   Record.AddSourceLocation(S->getFinallyLoc());
2205   Record.AddStmt(S->getBlock());
2206   Code = serialization::STMT_SEH_FINALLY;
2207 }
2208
2209 void ASTStmtWriter::VisitSEHTryStmt(SEHTryStmt *S) {
2210   VisitStmt(S);
2211   Record.push_back(S->getIsCXXTry());
2212   Record.AddSourceLocation(S->getTryLoc());
2213   Record.AddStmt(S->getTryBlock());
2214   Record.AddStmt(S->getHandler());
2215   Code = serialization::STMT_SEH_TRY;
2216 }
2217
2218 void ASTStmtWriter::VisitSEHLeaveStmt(SEHLeaveStmt *S) {
2219   VisitStmt(S);
2220   Record.AddSourceLocation(S->getLeaveLoc());
2221   Code = serialization::STMT_SEH_LEAVE;
2222 }
2223
2224 //===----------------------------------------------------------------------===//
2225 // OpenMP Directives.
2226 //===----------------------------------------------------------------------===//
2227
2228 void ASTStmtWriter::VisitOMPCanonicalLoop(OMPCanonicalLoop *S) {
2229   VisitStmt(S);
2230   for (Stmt *SubStmt : S->SubStmts)
2231     Record.AddStmt(SubStmt);
2232   Code = serialization::STMT_OMP_CANONICAL_LOOP;
2233 }
2234
2235 void ASTStmtWriter::VisitOMPExecutableDirective(OMPExecutableDirective *E) {
2236   Record.writeOMPChildren(E->Data);
2237   Record.AddSourceLocation(E->getBeginLoc());
2238   Record.AddSourceLocation(E->getEndLoc());
2239   Record.writeEnum(E->getMappedDirective());
2240 }
2241
2242 void ASTStmtWriter::VisitOMPLoopBasedDirective(OMPLoopBasedDirective *D) {
2243   VisitStmt(D);
2244   Record.writeUInt32(D->getLoopsNumber());
2245   VisitOMPExecutableDirective(D);
2246 }
2247
2248 void ASTStmtWriter::VisitOMPLoopDirective(OMPLoopDirective *D) {
2249   VisitOMPLoopBasedDirective(D);
2250 }
2251
2252 void ASTStmtWriter::VisitOMPMetaDirective(OMPMetaDirective *D) {
2253   VisitStmt(D);
2254   Record.push_back(D->getNumClauses());
2255   VisitOMPExecutableDirective(D);
2256   Code = serialization::STMT_OMP_META_DIRECTIVE;
2257 }
2258
2259 void ASTStmtWriter::VisitOMPParallelDirective(OMPParallelDirective *D) {
2260   VisitStmt(D);
2261   VisitOMPExecutableDirective(D);
2262   Record.writeBool(D->hasCancel());
2263   Code = serialization::STMT_OMP_PARALLEL_DIRECTIVE;
2264 }
2265
2266 void ASTStmtWriter::VisitOMPSimdDirective(OMPSimdDirective *D) {
2267   VisitOMPLoopDirective(D);
2268   Code = serialization::STMT_OMP_SIMD_DIRECTIVE;
2269 }
2270
2271 void ASTStmtWriter::VisitOMPLoopTransformationDirective(
2272     OMPLoopTransformationDirective *D) {
2273   VisitOMPLoopBasedDirective(D);
2274   Record.writeUInt32(D->getNumGeneratedLoops());
2275 }
2276
2277 void ASTStmtWriter::VisitOMPTileDirective(OMPTileDirective *D) {
2278   VisitOMPLoopTransformationDirective(D);
2279   Code = serialization::STMT_OMP_TILE_DIRECTIVE;
2280 }
2281
2282 void ASTStmtWriter::VisitOMPUnrollDirective(OMPUnrollDirective *D) {
2283   VisitOMPLoopTransformationDirective(D);
2284   Code = serialization::STMT_OMP_UNROLL_DIRECTIVE;
2285 }
2286
2287 void ASTStmtWriter::VisitOMPForDirective(OMPForDirective *D) {
2288   VisitOMPLoopDirective(D);
2289   Record.writeBool(D->hasCancel());
2290   Code = serialization::STMT_OMP_FOR_DIRECTIVE;
2291 }
2292
2293 void ASTStmtWriter::VisitOMPForSimdDirective(OMPForSimdDirective *D) {
2294   VisitOMPLoopDirective(D);
2295   Code = serialization::STMT_OMP_FOR_SIMD_DIRECTIVE;
2296 }
2297
2298 void ASTStmtWriter::VisitOMPSectionsDirective(OMPSectionsDirective *D) {
2299   VisitStmt(D);
2300   VisitOMPExecutableDirective(D);
2301   Record.writeBool(D->hasCancel());
2302   Code = serialization::STMT_OMP_SECTIONS_DIRECTIVE;
2303 }
2304
2305 void ASTStmtWriter::VisitOMPSectionDirective(OMPSectionDirective *D) {
2306   VisitStmt(D);
2307   VisitOMPExecutableDirective(D);
2308   Record.writeBool(D->hasCancel());
2309   Code = serialization::STMT_OMP_SECTION_DIRECTIVE;
2310 }
2311
2312 void ASTStmtWriter::VisitOMPScopeDirective(OMPScopeDirective *D) {
2313   VisitStmt(D);
2314   VisitOMPExecutableDirective(D);
2315   Code = serialization::STMT_OMP_SCOPE_DIRECTIVE;
2316 }
2317
2318 void ASTStmtWriter::VisitOMPSingleDirective(OMPSingleDirective *D) {
2319   VisitStmt(D);
2320   VisitOMPExecutableDirective(D);
2321   Code = serialization::STMT_OMP_SINGLE_DIRECTIVE;
2322 }
2323
2324 void ASTStmtWriter::VisitOMPMasterDirective(OMPMasterDirective *D) {
2325   VisitStmt(D);
2326   VisitOMPExecutableDirective(D);
2327   Code = serialization::STMT_OMP_MASTER_DIRECTIVE;
2328 }
2329
2330 void ASTStmtWriter::VisitOMPCriticalDirective(OMPCriticalDirective *D) {
2331   VisitStmt(D);
2332   VisitOMPExecutableDirective(D);
2333   Record.AddDeclarationNameInfo(D->getDirectiveName());
2334   Code = serialization::STMT_OMP_CRITICAL_DIRECTIVE;
2335 }
2336
2337 void ASTStmtWriter::VisitOMPParallelForDirective(OMPParallelForDirective *D) {
2338   VisitOMPLoopDirective(D);
2339   Record.writeBool(D->hasCancel());
2340   Code = serialization::STMT_OMP_PARALLEL_FOR_DIRECTIVE;
2341 }
2342
2343 void ASTStmtWriter::VisitOMPParallelForSimdDirective(
2344     OMPParallelForSimdDirective *D) {
2345   VisitOMPLoopDirective(D);
2346   Code = serialization::STMT_OMP_PARALLEL_FOR_SIMD_DIRECTIVE;
2347 }
2348
2349 void ASTStmtWriter::VisitOMPParallelMasterDirective(
2350     OMPParallelMasterDirective *D) {
2351   VisitStmt(D);
2352   VisitOMPExecutableDirective(D);
2353   Code = serialization::STMT_OMP_PARALLEL_MASTER_DIRECTIVE;
2354 }
2355
2356 void ASTStmtWriter::VisitOMPParallelMaskedDirective(
2357     OMPParallelMaskedDirective *D) {
2358   VisitStmt(D);
2359   VisitOMPExecutableDirective(D);
2360   Code = serialization::STMT_OMP_PARALLEL_MASKED_DIRECTIVE;
2361 }
2362
2363 void ASTStmtWriter::VisitOMPParallelSectionsDirective(
2364     OMPParallelSectionsDirective *D) {
2365   VisitStmt(D);
2366   VisitOMPExecutableDirective(D);
2367   Record.writeBool(D->hasCancel());
2368   Code = serialization::STMT_OMP_PARALLEL_SECTIONS_DIRECTIVE;
2369 }
2370
2371 void ASTStmtWriter::VisitOMPTaskDirective(OMPTaskDirective *D) {
2372   VisitStmt(D);
2373   VisitOMPExecutableDirective(D);
2374   Record.writeBool(D->hasCancel());
2375   Code = serialization::STMT_OMP_TASK_DIRECTIVE;
2376 }
2377
2378 void ASTStmtWriter::VisitOMPAtomicDirective(OMPAtomicDirective *D) {
2379   VisitStmt(D);
2380   VisitOMPExecutableDirective(D);
2381   Record.writeBool(D->isXLHSInRHSPart());
2382   Record.writeBool(D->isPostfixUpdate());
2383   Record.writeBool(D->isFailOnly());
2384   Code = serialization::STMT_OMP_ATOMIC_DIRECTIVE;
2385 }
2386
2387 void ASTStmtWriter::VisitOMPTargetDirective(OMPTargetDirective *D) {
2388   VisitStmt(D);
2389   VisitOMPExecutableDirective(D);
2390   Code = serialization::STMT_OMP_TARGET_DIRECTIVE;
2391 }
2392
2393 void ASTStmtWriter::VisitOMPTargetDataDirective(OMPTargetDataDirective *D) {
2394   VisitStmt(D);
2395   VisitOMPExecutableDirective(D);
2396   Code = serialization::STMT_OMP_TARGET_DATA_DIRECTIVE;
2397 }
2398
2399 void ASTStmtWriter::VisitOMPTargetEnterDataDirective(
2400     OMPTargetEnterDataDirective *D) {
2401   VisitStmt(D);
2402   VisitOMPExecutableDirective(D);
2403   Code = serialization::STMT_OMP_TARGET_ENTER_DATA_DIRECTIVE;
2404 }
2405
2406 void ASTStmtWriter::VisitOMPTargetExitDataDirective(
2407     OMPTargetExitDataDirective *D) {
2408   VisitStmt(D);
2409   VisitOMPExecutableDirective(D);
2410   Code = serialization::STMT_OMP_TARGET_EXIT_DATA_DIRECTIVE;
2411 }
2412
2413 void ASTStmtWriter::VisitOMPTargetParallelDirective(
2414     OMPTargetParallelDirective *D) {
2415   VisitStmt(D);
2416   VisitOMPExecutableDirective(D);
2417   Record.writeBool(D->hasCancel());
2418   Code = serialization::STMT_OMP_TARGET_PARALLEL_DIRECTIVE;
2419 }
2420
2421 void ASTStmtWriter::VisitOMPTargetParallelForDirective(
2422     OMPTargetParallelForDirective *D) {
2423   VisitOMPLoopDirective(D);
2424   Record.writeBool(D->hasCancel());
2425   Code = serialization::STMT_OMP_TARGET_PARALLEL_FOR_DIRECTIVE;
2426 }
2427
2428 void ASTStmtWriter::VisitOMPTaskyieldDirective(OMPTaskyieldDirective *D) {
2429   VisitStmt(D);
2430   VisitOMPExecutableDirective(D);
2431   Code = serialization::STMT_OMP_TASKYIELD_DIRECTIVE;
2432 }
2433
2434 void ASTStmtWriter::VisitOMPBarrierDirective(OMPBarrierDirective *D) {
2435   VisitStmt(D);
2436   VisitOMPExecutableDirective(D);
2437   Code = serialization::STMT_OMP_BARRIER_DIRECTIVE;
2438 }
2439
2440 void ASTStmtWriter::VisitOMPTaskwaitDirective(OMPTaskwaitDirective *D) {
2441   VisitStmt(D);
2442   Record.push_back(D->getNumClauses());
2443   VisitOMPExecutableDirective(D);
2444   Code = serialization::STMT_OMP_TASKWAIT_DIRECTIVE;
2445 }
2446
2447 void ASTStmtWriter::VisitOMPErrorDirective(OMPErrorDirective *D) {
2448   VisitStmt(D);
2449   Record.push_back(D->getNumClauses());
2450   VisitOMPExecutableDirective(D);
2451   Code = serialization::STMT_OMP_ERROR_DIRECTIVE;
2452 }
2453
2454 void ASTStmtWriter::VisitOMPTaskgroupDirective(OMPTaskgroupDirective *D) {
2455   VisitStmt(D);
2456   VisitOMPExecutableDirective(D);
2457   Code = serialization::STMT_OMP_TASKGROUP_DIRECTIVE;
2458 }
2459
2460 void ASTStmtWriter::VisitOMPFlushDirective(OMPFlushDirective *D) {
2461   VisitStmt(D);
2462   VisitOMPExecutableDirective(D);
2463   Code = serialization::STMT_OMP_FLUSH_DIRECTIVE;
2464 }
2465
2466 void ASTStmtWriter::VisitOMPDepobjDirective(OMPDepobjDirective *D) {
2467   VisitStmt(D);
2468   VisitOMPExecutableDirective(D);
2469   Code = serialization::STMT_OMP_DEPOBJ_DIRECTIVE;
2470 }
2471
2472 void ASTStmtWriter::VisitOMPScanDirective(OMPScanDirective *D) {
2473   VisitStmt(D);
2474   VisitOMPExecutableDirective(D);
2475   Code = serialization::STMT_OMP_SCAN_DIRECTIVE;
2476 }
2477
2478 void ASTStmtWriter::VisitOMPOrderedDirective(OMPOrderedDirective *D) {
2479   VisitStmt(D);
2480   VisitOMPExecutableDirective(D);
2481   Code = serialization::STMT_OMP_ORDERED_DIRECTIVE;
2482 }
2483
2484 void ASTStmtWriter::VisitOMPTeamsDirective(OMPTeamsDirective *D) {
2485   VisitStmt(D);
2486   VisitOMPExecutableDirective(D);
2487   Code = serialization::STMT_OMP_TEAMS_DIRECTIVE;
2488 }
2489
2490 void ASTStmtWriter::VisitOMPCancellationPointDirective(
2491     OMPCancellationPointDirective *D) {
2492   VisitStmt(D);
2493   VisitOMPExecutableDirective(D);
2494   Record.writeEnum(D->getCancelRegion());
2495   Code = serialization::STMT_OMP_CANCELLATION_POINT_DIRECTIVE;
2496 }
2497
2498 void ASTStmtWriter::VisitOMPCancelDirective(OMPCancelDirective *D) {
2499   VisitStmt(D);
2500   VisitOMPExecutableDirective(D);
2501   Record.writeEnum(D->getCancelRegion());
2502   Code = serialization::STMT_OMP_CANCEL_DIRECTIVE;
2503 }
2504
2505 void ASTStmtWriter::VisitOMPTaskLoopDirective(OMPTaskLoopDirective *D) {
2506   VisitOMPLoopDirective(D);
2507   Record.writeBool(D->hasCancel());
2508   Code = serialization::STMT_OMP_TASKLOOP_DIRECTIVE;
2509 }
2510
2511 void ASTStmtWriter::VisitOMPTaskLoopSimdDirective(OMPTaskLoopSimdDirective *D) {
2512   VisitOMPLoopDirective(D);
2513   Code = serialization::STMT_OMP_TASKLOOP_SIMD_DIRECTIVE;
2514 }
2515
2516 void ASTStmtWriter::VisitOMPMasterTaskLoopDirective(
2517     OMPMasterTaskLoopDirective *D) {
2518   VisitOMPLoopDirective(D);
2519   Record.writeBool(D->hasCancel());
2520   Code = serialization::STMT_OMP_MASTER_TASKLOOP_DIRECTIVE;
2521 }
2522
2523 void ASTStmtWriter::VisitOMPMaskedTaskLoopDirective(
2524     OMPMaskedTaskLoopDirective *D) {
2525   VisitOMPLoopDirective(D);
2526   Record.writeBool(D->hasCancel());
2527   Code = serialization::STMT_OMP_MASKED_TASKLOOP_DIRECTIVE;
2528 }
2529
2530 void ASTStmtWriter::VisitOMPMasterTaskLoopSimdDirective(
2531     OMPMasterTaskLoopSimdDirective *D) {
2532   VisitOMPLoopDirective(D);
2533   Code = serialization::STMT_OMP_MASTER_TASKLOOP_SIMD_DIRECTIVE;
2534 }
2535
2536 void ASTStmtWriter::VisitOMPMaskedTaskLoopSimdDirective(
2537     OMPMaskedTaskLoopSimdDirective *D) {
2538   VisitOMPLoopDirective(D);
2539   Code = serialization::STMT_OMP_MASKED_TASKLOOP_SIMD_DIRECTIVE;
2540 }
2541
2542 void ASTStmtWriter::VisitOMPParallelMasterTaskLoopDirective(
2543     OMPParallelMasterTaskLoopDirective *D) {
2544   VisitOMPLoopDirective(D);
2545   Record.writeBool(D->hasCancel());
2546   Code = serialization::STMT_OMP_PARALLEL_MASTER_TASKLOOP_DIRECTIVE;
2547 }
2548
2549 void ASTStmtWriter::VisitOMPParallelMaskedTaskLoopDirective(
2550     OMPParallelMaskedTaskLoopDirective *D) {
2551   VisitOMPLoopDirective(D);
2552   Record.writeBool(D->hasCancel());
2553   Code = serialization::STMT_OMP_PARALLEL_MASKED_TASKLOOP_DIRECTIVE;
2554 }
2555
2556 void ASTStmtWriter::VisitOMPParallelMasterTaskLoopSimdDirective(
2557     OMPParallelMasterTaskLoopSimdDirective *D) {
2558   VisitOMPLoopDirective(D);
2559   Code = serialization::STMT_OMP_PARALLEL_MASTER_TASKLOOP_SIMD_DIRECTIVE;
2560 }
2561
2562 void ASTStmtWriter::VisitOMPParallelMaskedTaskLoopSimdDirective(
2563     OMPParallelMaskedTaskLoopSimdDirective *D) {
2564   VisitOMPLoopDirective(D);
2565   Code = serialization::STMT_OMP_PARALLEL_MASKED_TASKLOOP_SIMD_DIRECTIVE;
2566 }
2567
2568 void ASTStmtWriter::VisitOMPDistributeDirective(OMPDistributeDirective *D) {
2569   VisitOMPLoopDirective(D);
2570   Code = serialization::STMT_OMP_DISTRIBUTE_DIRECTIVE;
2571 }
2572
2573 void ASTStmtWriter::VisitOMPTargetUpdateDirective(OMPTargetUpdateDirective *D) {
2574   VisitStmt(D);
2575   VisitOMPExecutableDirective(D);
2576   Code = serialization::STMT_OMP_TARGET_UPDATE_DIRECTIVE;
2577 }
2578
2579 void ASTStmtWriter::VisitOMPDistributeParallelForDirective(
2580     OMPDistributeParallelForDirective *D) {
2581   VisitOMPLoopDirective(D);
2582   Record.writeBool(D->hasCancel());
2583   Code = serialization::STMT_OMP_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE;
2584 }
2585
2586 void ASTStmtWriter::VisitOMPDistributeParallelForSimdDirective(
2587     OMPDistributeParallelForSimdDirective *D) {
2588   VisitOMPLoopDirective(D);
2589   Code = serialization::STMT_OMP_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE;
2590 }
2591
2592 void ASTStmtWriter::VisitOMPDistributeSimdDirective(
2593     OMPDistributeSimdDirective *D) {
2594   VisitOMPLoopDirective(D);
2595   Code = serialization::STMT_OMP_DISTRIBUTE_SIMD_DIRECTIVE;
2596 }
2597
2598 void ASTStmtWriter::VisitOMPTargetParallelForSimdDirective(
2599     OMPTargetParallelForSimdDirective *D) {
2600   VisitOMPLoopDirective(D);
2601   Code = serialization::STMT_OMP_TARGET_PARALLEL_FOR_SIMD_DIRECTIVE;
2602 }
2603
2604 void ASTStmtWriter::VisitOMPTargetSimdDirective(OMPTargetSimdDirective *D) {
2605   VisitOMPLoopDirective(D);
2606   Code = serialization::STMT_OMP_TARGET_SIMD_DIRECTIVE;
2607 }
2608
2609 void ASTStmtWriter::VisitOMPTeamsDistributeDirective(
2610     OMPTeamsDistributeDirective *D) {
2611   VisitOMPLoopDirective(D);
2612   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_DIRECTIVE;
2613 }
2614
2615 void ASTStmtWriter::VisitOMPTeamsDistributeSimdDirective(
2616     OMPTeamsDistributeSimdDirective *D) {
2617   VisitOMPLoopDirective(D);
2618   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_SIMD_DIRECTIVE;
2619 }
2620
2621 void ASTStmtWriter::VisitOMPTeamsDistributeParallelForSimdDirective(
2622     OMPTeamsDistributeParallelForSimdDirective *D) {
2623   VisitOMPLoopDirective(D);
2624   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE;
2625 }
2626
2627 void ASTStmtWriter::VisitOMPTeamsDistributeParallelForDirective(
2628     OMPTeamsDistributeParallelForDirective *D) {
2629   VisitOMPLoopDirective(D);
2630   Record.writeBool(D->hasCancel());
2631   Code = serialization::STMT_OMP_TEAMS_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE;
2632 }
2633
2634 void ASTStmtWriter::VisitOMPTargetTeamsDirective(OMPTargetTeamsDirective *D) {
2635   VisitStmt(D);
2636   VisitOMPExecutableDirective(D);
2637   Code = serialization::STMT_OMP_TARGET_TEAMS_DIRECTIVE;
2638 }
2639
2640 void ASTStmtWriter::VisitOMPTargetTeamsDistributeDirective(
2641     OMPTargetTeamsDistributeDirective *D) {
2642   VisitOMPLoopDirective(D);
2643   Code = serialization::STMT_OMP_TARGET_TEAMS_DISTRIBUTE_DIRECTIVE;
2644 }
2645
2646 void ASTStmtWriter::VisitOMPTargetTeamsDistributeParallelForDirective(
2647     OMPTargetTeamsDistributeParallelForDirective *D) {
2648   VisitOMPLoopDirective(D);
2649   Record.writeBool(D->hasCancel());
2650   Code = serialization::STMT_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE;
2651 }
2652
2653 void ASTStmtWriter::VisitOMPTargetTeamsDistributeParallelForSimdDirective(
2654     OMPTargetTeamsDistributeParallelForSimdDirective *D) {
2655   VisitOMPLoopDirective(D);
2656   Code = serialization::
2657       STMT_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE;
2658 }
2659
2660 void ASTStmtWriter::VisitOMPTargetTeamsDistributeSimdDirective(
2661     OMPTargetTeamsDistributeSimdDirective *D) {
2662   VisitOMPLoopDirective(D);
2663   Code = serialization::STMT_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD_DIRECTIVE;
2664 }
2665
2666 void ASTStmtWriter::VisitOMPInteropDirective(OMPInteropDirective *D) {
2667   VisitStmt(D);
2668   VisitOMPExecutableDirective(D);
2669   Code = serialization::STMT_OMP_INTEROP_DIRECTIVE;
2670 }
2671
2672 void ASTStmtWriter::VisitOMPDispatchDirective(OMPDispatchDirective *D) {
2673   VisitStmt(D);
2674   VisitOMPExecutableDirective(D);
2675   Record.AddSourceLocation(D->getTargetCallLoc());
2676   Code = serialization::STMT_OMP_DISPATCH_DIRECTIVE;
2677 }
2678
2679 void ASTStmtWriter::VisitOMPMaskedDirective(OMPMaskedDirective *D) {
2680   VisitStmt(D);
2681   VisitOMPExecutableDirective(D);
2682   Code = serialization::STMT_OMP_MASKED_DIRECTIVE;
2683 }
2684
2685 void ASTStmtWriter::VisitOMPGenericLoopDirective(OMPGenericLoopDirective *D) {
2686   VisitOMPLoopDirective(D);
2687   Code = serialization::STMT_OMP_GENERIC_LOOP_DIRECTIVE;
2688 }
2689
2690 void ASTStmtWriter::VisitOMPTeamsGenericLoopDirective(
2691     OMPTeamsGenericLoopDirective *D) {
2692   VisitOMPLoopDirective(D);
2693   Code = serialization::STMT_OMP_TEAMS_GENERIC_LOOP_DIRECTIVE;
2694 }
2695
2696 void ASTStmtWriter::VisitOMPTargetTeamsGenericLoopDirective(
2697     OMPTargetTeamsGenericLoopDirective *D) {
2698   VisitOMPLoopDirective(D);
2699   Code = serialization::STMT_OMP_TARGET_TEAMS_GENERIC_LOOP_DIRECTIVE;
2700 }
2701
2702 void ASTStmtWriter::VisitOMPParallelGenericLoopDirective(
2703     OMPParallelGenericLoopDirective *D) {
2704   VisitOMPLoopDirective(D);
2705   Code = serialization::STMT_OMP_PARALLEL_GENERIC_LOOP_DIRECTIVE;
2706 }
2707
2708 void ASTStmtWriter::VisitOMPTargetParallelGenericLoopDirective(
2709     OMPTargetParallelGenericLoopDirective *D) {
2710   VisitOMPLoopDirective(D);
2711   Code = serialization::STMT_OMP_TARGET_PARALLEL_GENERIC_LOOP_DIRECTIVE;
2712 }
2713
2714 //===----------------------------------------------------------------------===//
2715 // ASTWriter Implementation
2716 //===----------------------------------------------------------------------===//
2717
2718 unsigned ASTWriter::RecordSwitchCaseID(SwitchCase *S) {
2719   assert(!SwitchCaseIDs.contains(S) && "SwitchCase recorded twice");
2720   unsigned NextID = SwitchCaseIDs.size();
2721   SwitchCaseIDs[S] = NextID;
2722   return NextID;
2723 }
2724
2725 unsigned ASTWriter::getSwitchCaseID(SwitchCase *S) {
2726   assert(SwitchCaseIDs.contains(S) && "SwitchCase hasn't been seen yet");
2727   return SwitchCaseIDs[S];
2728 }
2729
2730 void ASTWriter::ClearSwitchCaseIDs() {
2731   SwitchCaseIDs.clear();
2732 }
2733
2734 /// Write the given substatement or subexpression to the
2735 /// bitstream.
2736 void ASTWriter::WriteSubStmt(Stmt *S) {
2737   RecordData Record;
2738   ASTStmtWriter Writer(*this, Record);
2739   ++NumStatements;
2740
2741   if (!S) {
2742     Stream.EmitRecord(serialization::STMT_NULL_PTR, Record);
2743     return;
2744   }
2745
2746   llvm::DenseMap<Stmt *, uint64_t>::iterator I = SubStmtEntries.find(S);
2747   if (I != SubStmtEntries.end()) {
2748     Record.push_back(I->second);
2749     Stream.EmitRecord(serialization::STMT_REF_PTR, Record);
2750     return;
2751   }
2752
2753 #ifndef NDEBUG
2754   assert(!ParentStmts.count(S) && "There is a Stmt cycle!");
2755
2756   struct ParentStmtInserterRAII {
2757     Stmt *S;
2758     llvm::DenseSet<Stmt *> &ParentStmts;
2759
2760     ParentStmtInserterRAII(Stmt *S, llvm::DenseSet<Stmt *> &ParentStmts)
2761       : S(S), ParentStmts(ParentStmts) {
2762       ParentStmts.insert(S);
2763     }
2764     ~ParentStmtInserterRAII() {
2765       ParentStmts.erase(S);
2766     }
2767   };
2768
2769   ParentStmtInserterRAII ParentStmtInserter(S, ParentStmts);
2770 #endif
2771
2772   Writer.Visit(S);
2773
2774   uint64_t Offset = Writer.Emit();
2775   SubStmtEntries[S] = Offset;
2776 }
2777
2778 /// Flush all of the statements that have been added to the
2779 /// queue via AddStmt().
2780 void ASTRecordWriter::FlushStmts() {
2781   // We expect to be the only consumer of the two temporary statement maps,
2782   // assert that they are empty.
2783   assert(Writer->SubStmtEntries.empty() && "unexpected entries in sub-stmt map");
2784   assert(Writer->ParentStmts.empty() && "unexpected entries in parent stmt map");
2785
2786   for (unsigned I = 0, N = StmtsToEmit.size(); I != N; ++I) {
2787     Writer->WriteSubStmt(StmtsToEmit[I]);
2788
2789     assert(N == StmtsToEmit.size() && "record modified while being written!");
2790
2791     // Note that we are at the end of a full expression. Any
2792     // expression records that follow this one are part of a different
2793     // expression.
2794     Writer->Stream.EmitRecord(serialization::STMT_STOP, ArrayRef<uint32_t>());
2795
2796     Writer->SubStmtEntries.clear();
2797     Writer->ParentStmts.clear();
2798   }
2799
2800   StmtsToEmit.clear();
2801 }
2802
2803 void ASTRecordWriter::FlushSubStmts() {
2804   // For a nested statement, write out the substatements in reverse order (so
2805   // that a simple stack machine can be used when loading), and don't emit a
2806   // STMT_STOP after each one.
2807   for (unsigned I = 0, N = StmtsToEmit.size(); I != N; ++I) {
2808     Writer->WriteSubStmt(StmtsToEmit[N - I - 1]);
2809     assert(N == StmtsToEmit.size() && "record modified while being written!");
2810   }
2811
2812   StmtsToEmit.clear();
2813 }