1 //===---- StmtProfile.cpp - Profile implementation for Stmt ASTs ----------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the Stmt::Profile method, which builds a unique bit
11 // representation that identifies a statement/expression.
12 //
13 //===----------------------------------------------------------------------===//
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/DeclCXX.h"
16 #include "clang/AST/DeclObjC.h"
17 #include "clang/AST/DeclTemplate.h"
18 #include "clang/AST/Expr.h"
19 #include "clang/AST/ExprCXX.h"
20 #include "clang/AST/ExprObjC.h"
21 #include "clang/AST/StmtVisitor.h"
22 #include "llvm/ADT/FoldingSet.h"
23 using namespace clang;
24 
25 namespace {
26   class StmtProfiler : public ConstStmtVisitor<StmtProfiler> {
27     llvm::FoldingSetNodeID &ID;
28     const ASTContext &Context;
29     bool Canonical;
30 
31   public:
32     StmtProfiler(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
33                  bool Canonical)
34       : ID(ID), Context(Context), Canonical(Canonical) { }
35 
36     void VisitStmt(const Stmt *S);
37 
38 #define STMT(Node, Base) void Visit##Node(const Node *S);
39 #include "clang/AST/StmtNodes.inc"
40 
41     /// \brief Visit a declaration that is referenced within an expression
42     /// or statement.
43     void VisitDecl(const Decl *D);
44 
45     /// \brief Visit a type that is referenced within an expression or
46     /// statement.
47     void VisitType(QualType T);
48 
49     /// \brief Visit a name that occurs within an expression or statement.
50     void VisitName(DeclarationName Name);
51 
52     /// \brief Visit a nested-name-specifier that occurs within an expression
53     /// or statement.
54     void VisitNestedNameSpecifier(NestedNameSpecifier *NNS);
55 
56     /// \brief Visit a template name that occurs within an expression or
57     /// statement.
58     void VisitTemplateName(TemplateName Name);
59 
60     /// \brief Visit template arguments that occur within an expression or
61     /// statement.
62     void VisitTemplateArguments(const TemplateArgumentLoc *Args,
63                                 unsigned NumArgs);
64 
65     /// \brief Visit a single template argument.
66     void VisitTemplateArgument(const TemplateArgument &Arg);
67   };
68 }
69 
70 void StmtProfiler::VisitStmt(const Stmt *S) {
71   ID.AddInteger(S->getStmtClass());
72   for (Stmt::const_child_range C = S->children(); C; ++C) {
73     if (*C)
74       Visit(*C);
75     else
76       ID.AddInteger(0);
77   }
78 }
79 
80 void StmtProfiler::VisitDeclStmt(const DeclStmt *S) {
81   VisitStmt(S);
82   for (const auto *D : S->decls())
83     VisitDecl(D);
84 }
85 
86 void StmtProfiler::VisitNullStmt(const NullStmt *S) {
87   VisitStmt(S);
88 }
89 
90 void StmtProfiler::VisitCompoundStmt(const CompoundStmt *S) {
91   VisitStmt(S);
92 }
93 
94 void StmtProfiler::VisitSwitchCase(const SwitchCase *S) {
95   VisitStmt(S);
96 }
97 
98 void StmtProfiler::VisitCaseStmt(const CaseStmt *S) {
99   VisitStmt(S);
100 }
101 
102 void StmtProfiler::VisitDefaultStmt(const DefaultStmt *S) {
103   VisitStmt(S);
104 }
105 
106 void StmtProfiler::VisitLabelStmt(const LabelStmt *S) {
107   VisitStmt(S);
108   VisitDecl(S->getDecl());
109 }
110 
111 void StmtProfiler::VisitAttributedStmt(const AttributedStmt *S) {
112   VisitStmt(S);
113   // TODO: maybe visit attributes?
114 }
115 
116 void StmtProfiler::VisitIfStmt(const IfStmt *S) {
117   VisitStmt(S);
118   VisitDecl(S->getConditionVariable());
119 }
120 
121 void StmtProfiler::VisitSwitchStmt(const SwitchStmt *S) {
122   VisitStmt(S);
123   VisitDecl(S->getConditionVariable());
124 }
125 
126 void StmtProfiler::VisitWhileStmt(const WhileStmt *S) {
127   VisitStmt(S);
128   VisitDecl(S->getConditionVariable());
129 }
130 
131 void StmtProfiler::VisitDoStmt(const DoStmt *S) {
132   VisitStmt(S);
133 }
134 
135 void StmtProfiler::VisitForStmt(const ForStmt *S) {
136   VisitStmt(S);
137 }
138 
139 void StmtProfiler::VisitGotoStmt(const GotoStmt *S) {
140   VisitStmt(S);
141   VisitDecl(S->getLabel());
142 }
143 
144 void StmtProfiler::VisitIndirectGotoStmt(const IndirectGotoStmt *S) {
145   VisitStmt(S);
146 }
147 
148 void StmtProfiler::VisitContinueStmt(const ContinueStmt *S) {
149   VisitStmt(S);
150 }
151 
152 void StmtProfiler::VisitBreakStmt(const BreakStmt *S) {
153   VisitStmt(S);
154 }
155 
156 void StmtProfiler::VisitReturnStmt(const ReturnStmt *S) {
157   VisitStmt(S);
158 }
159 
160 void StmtProfiler::VisitGCCAsmStmt(const GCCAsmStmt *S) {
161   VisitStmt(S);
162   ID.AddBoolean(S->isVolatile());
163   ID.AddBoolean(S->isSimple());
164   VisitStringLiteral(S->getAsmString());
165   ID.AddInteger(S->getNumOutputs());
166   for (unsigned I = 0, N = S->getNumOutputs(); I != N; ++I) {
167     ID.AddString(S->getOutputName(I));
168     VisitStringLiteral(S->getOutputConstraintLiteral(I));
169   }
170   ID.AddInteger(S->getNumInputs());
171   for (unsigned I = 0, N = S->getNumInputs(); I != N; ++I) {
172     ID.AddString(S->getInputName(I));
173     VisitStringLiteral(S->getInputConstraintLiteral(I));
174   }
175   ID.AddInteger(S->getNumClobbers());
176   for (unsigned I = 0, N = S->getNumClobbers(); I != N; ++I)
177     VisitStringLiteral(S->getClobberStringLiteral(I));
178 }
179 
180 void StmtProfiler::VisitMSAsmStmt(const MSAsmStmt *S) {
181   // FIXME: Implement MS style inline asm statement profiler.
182   VisitStmt(S);
183 }
184 
185 void StmtProfiler::VisitCXXCatchStmt(const CXXCatchStmt *S) {
186   VisitStmt(S);
187   VisitType(S->getCaughtType());
188 }
189 
190 void StmtProfiler::VisitCXXTryStmt(const CXXTryStmt *S) {
191   VisitStmt(S);
192 }
193 
194 void StmtProfiler::VisitCXXForRangeStmt(const CXXForRangeStmt *S) {
195   VisitStmt(S);
196 }
197 
198 void StmtProfiler::VisitMSDependentExistsStmt(const MSDependentExistsStmt *S) {
199   VisitStmt(S);
200   ID.AddBoolean(S->isIfExists());
201   VisitNestedNameSpecifier(S->getQualifierLoc().getNestedNameSpecifier());
202   VisitName(S->getNameInfo().getName());
203 }
204 
205 void StmtProfiler::VisitSEHTryStmt(const SEHTryStmt *S) {
206   VisitStmt(S);
207 }
208 
209 void StmtProfiler::VisitSEHFinallyStmt(const SEHFinallyStmt *S) {
210   VisitStmt(S);
211 }
212 
213 void StmtProfiler::VisitSEHExceptStmt(const SEHExceptStmt *S) {
214   VisitStmt(S);
215 }
216 
217 void StmtProfiler::VisitCapturedStmt(const CapturedStmt *S) {
218   VisitStmt(S);
219 }
220 
221 void StmtProfiler::VisitObjCForCollectionStmt(const ObjCForCollectionStmt *S) {
222   VisitStmt(S);
223 }
224 
225 void StmtProfiler::VisitObjCAtCatchStmt(const ObjCAtCatchStmt *S) {
226   VisitStmt(S);
227   ID.AddBoolean(S->hasEllipsis());
228   if (S->getCatchParamDecl())
229     VisitType(S->getCatchParamDecl()->getType());
230 }
231 
232 void StmtProfiler::VisitObjCAtFinallyStmt(const ObjCAtFinallyStmt *S) {
233   VisitStmt(S);
234 }
235 
236 void StmtProfiler::VisitObjCAtTryStmt(const ObjCAtTryStmt *S) {
237   VisitStmt(S);
238 }
239 
240 void
241 StmtProfiler::VisitObjCAtSynchronizedStmt(const ObjCAtSynchronizedStmt *S) {
242   VisitStmt(S);
243 }
244 
245 void StmtProfiler::VisitObjCAtThrowStmt(const ObjCAtThrowStmt *S) {
246   VisitStmt(S);
247 }
248 
249 void
250 StmtProfiler::VisitObjCAutoreleasePoolStmt(const ObjCAutoreleasePoolStmt *S) {
251   VisitStmt(S);
252 }
253 
254 namespace {
255 class OMPClauseProfiler : public ConstOMPClauseVisitor<OMPClauseProfiler> {
256   StmtProfiler *Profiler;
257   /// \brief Process clauses with list of variables.
258   template <typename T>
259   void VisitOMPClauseList(T *Node);
260 public:
261   OMPClauseProfiler(StmtProfiler *P) : Profiler(P) { }
262 #define OPENMP_CLAUSE(Name, Class)                                             \
263   void Visit##Class(const Class *C);
264 #include "clang/Basic/OpenMPKinds.def"
265 };
266 
267 void OMPClauseProfiler::VisitOMPIfClause(const OMPIfClause *C) {
268   if (C->getCondition())
269     Profiler->VisitStmt(C->getCondition());
270 }
271 
272 void OMPClauseProfiler::VisitOMPNumThreadsClause(const OMPNumThreadsClause *C) {
273   if (C->getNumThreads())
274     Profiler->VisitStmt(C->getNumThreads());
275 }
276 
277 void OMPClauseProfiler::VisitOMPSafelenClause(const OMPSafelenClause *C) {
278   if (C->getSafelen())
279     Profiler->VisitStmt(C->getSafelen());
280 }
281 
282 void OMPClauseProfiler::VisitOMPCollapseClause(const OMPCollapseClause *C) {
283   if (C->getNumForLoops())
284     Profiler->VisitStmt(C->getNumForLoops());
285 }
286 
287 void OMPClauseProfiler::VisitOMPDefaultClause(const OMPDefaultClause *C) { }
288 
289 void OMPClauseProfiler::VisitOMPProcBindClause(const OMPProcBindClause *C) { }
290 
291 void OMPClauseProfiler::VisitOMPScheduleClause(const OMPScheduleClause *C) {
292   if (C->getChunkSize())
293     Profiler->VisitStmt(C->getChunkSize());
294 }
295 
296 void OMPClauseProfiler::VisitOMPOrderedClause(const OMPOrderedClause *) {}
297 
298 void OMPClauseProfiler::VisitOMPNowaitClause(const OMPNowaitClause *) {}
299 
300 template<typename T>
301 void OMPClauseProfiler::VisitOMPClauseList(T *Node) {
302   for (auto *I : Node->varlists())
303     Profiler->VisitStmt(I);
304 }
305 
306 void OMPClauseProfiler::VisitOMPPrivateClause(const OMPPrivateClause *C) {
307   VisitOMPClauseList(C);
308 }
309 void OMPClauseProfiler::VisitOMPFirstprivateClause(
310                                          const OMPFirstprivateClause *C) {
311   VisitOMPClauseList(C);
312 }
313 void
314 OMPClauseProfiler::VisitOMPLastprivateClause(const OMPLastprivateClause *C) {
315   VisitOMPClauseList(C);
316 }
317 void OMPClauseProfiler::VisitOMPSharedClause(const OMPSharedClause *C) {
318   VisitOMPClauseList(C);
319 }
320 void OMPClauseProfiler::VisitOMPReductionClause(
321                                          const OMPReductionClause *C) {
322   Profiler->VisitNestedNameSpecifier(
323       C->getQualifierLoc().getNestedNameSpecifier());
324   Profiler->VisitName(C->getNameInfo().getName());
325   VisitOMPClauseList(C);
326 }
327 void OMPClauseProfiler::VisitOMPLinearClause(const OMPLinearClause *C) {
328   VisitOMPClauseList(C);
329   Profiler->VisitStmt(C->getStep());
330 }
331 void OMPClauseProfiler::VisitOMPAlignedClause(const OMPAlignedClause *C) {
332   VisitOMPClauseList(C);
333   Profiler->VisitStmt(C->getAlignment());
334 }
335 void OMPClauseProfiler::VisitOMPCopyinClause(const OMPCopyinClause *C) {
336   VisitOMPClauseList(C);
337 }
338 }
339 
340 void
341 StmtProfiler::VisitOMPExecutableDirective(const OMPExecutableDirective *S) {
342   VisitStmt(S);
343   OMPClauseProfiler P(this);
344   ArrayRef<OMPClause *> Clauses = S->clauses();
345   for (ArrayRef<OMPClause *>::iterator I = Clauses.begin(), E = Clauses.end();
346        I != E; ++I)
347     if (*I)
348       P.Visit(*I);
349 }
350 
351 void StmtProfiler::VisitOMPParallelDirective(const OMPParallelDirective *S) {
352   VisitOMPExecutableDirective(S);
353 }
354 
355 void StmtProfiler::VisitOMPSimdDirective(const OMPSimdDirective *S) {
356   VisitOMPExecutableDirective(S);
357 }
358 
359 void StmtProfiler::VisitOMPForDirective(const OMPForDirective *S) {
360   VisitOMPExecutableDirective(S);
361 }
362 
363 void StmtProfiler::VisitExpr(const Expr *S) {
364   VisitStmt(S);
365 }
366 
367 void StmtProfiler::VisitDeclRefExpr(const DeclRefExpr *S) {
368   VisitExpr(S);
369   if (!Canonical)
370     VisitNestedNameSpecifier(S->getQualifier());
371   VisitDecl(S->getDecl());
372   if (!Canonical)
373     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
374 }
375 
376 void StmtProfiler::VisitPredefinedExpr(const PredefinedExpr *S) {
377   VisitExpr(S);
378   ID.AddInteger(S->getIdentType());
379 }
380 
381 void StmtProfiler::VisitIntegerLiteral(const IntegerLiteral *S) {
382   VisitExpr(S);
383   S->getValue().Profile(ID);
384 }
385 
386 void StmtProfiler::VisitCharacterLiteral(const CharacterLiteral *S) {
387   VisitExpr(S);
388   ID.AddInteger(S->getKind());
389   ID.AddInteger(S->getValue());
390 }
391 
392 void StmtProfiler::VisitFloatingLiteral(const FloatingLiteral *S) {
393   VisitExpr(S);
394   S->getValue().Profile(ID);
395   ID.AddBoolean(S->isExact());
396 }
397 
398 void StmtProfiler::VisitImaginaryLiteral(const ImaginaryLiteral *S) {
399   VisitExpr(S);
400 }
401 
402 void StmtProfiler::VisitStringLiteral(const StringLiteral *S) {
403   VisitExpr(S);
404   ID.AddString(S->getBytes());
405   ID.AddInteger(S->getKind());
406 }
407 
408 void StmtProfiler::VisitParenExpr(const ParenExpr *S) {
409   VisitExpr(S);
410 }
411 
412 void StmtProfiler::VisitParenListExpr(const ParenListExpr *S) {
413   VisitExpr(S);
414 }
415 
416 void StmtProfiler::VisitUnaryOperator(const UnaryOperator *S) {
417   VisitExpr(S);
418   ID.AddInteger(S->getOpcode());
419 }
420 
421 void StmtProfiler::VisitOffsetOfExpr(const OffsetOfExpr *S) {
422   VisitType(S->getTypeSourceInfo()->getType());
423   unsigned n = S->getNumComponents();
424   for (unsigned i = 0; i < n; ++i) {
425     const OffsetOfExpr::OffsetOfNode& ON = S->getComponent(i);
426     ID.AddInteger(ON.getKind());
427     switch (ON.getKind()) {
428     case OffsetOfExpr::OffsetOfNode::Array:
429       // Expressions handled below.
430       break;
431 
432     case OffsetOfExpr::OffsetOfNode::Field:
433       VisitDecl(ON.getField());
434       break;
435 
436     case OffsetOfExpr::OffsetOfNode::Identifier:
437       ID.AddPointer(ON.getFieldName());
438       break;
439 
440     case OffsetOfExpr::OffsetOfNode::Base:
441       // These nodes are implicit, and therefore don't need profiling.
442       break;
443     }
444   }
445 
446   VisitExpr(S);
447 }
448 
449 void
450 StmtProfiler::VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *S) {
451   VisitExpr(S);
452   ID.AddInteger(S->getKind());
453   if (S->isArgumentType())
454     VisitType(S->getArgumentType());
455 }
456 
457 void StmtProfiler::VisitArraySubscriptExpr(const ArraySubscriptExpr *S) {
458   VisitExpr(S);
459 }
460 
461 void StmtProfiler::VisitCallExpr(const CallExpr *S) {
462   VisitExpr(S);
463 }
464 
465 void StmtProfiler::VisitMemberExpr(const MemberExpr *S) {
466   VisitExpr(S);
467   VisitDecl(S->getMemberDecl());
468   if (!Canonical)
469     VisitNestedNameSpecifier(S->getQualifier());
470   ID.AddBoolean(S->isArrow());
471 }
472 
473 void StmtProfiler::VisitCompoundLiteralExpr(const CompoundLiteralExpr *S) {
474   VisitExpr(S);
475   ID.AddBoolean(S->isFileScope());
476 }
477 
478 void StmtProfiler::VisitCastExpr(const CastExpr *S) {
479   VisitExpr(S);
480 }
481 
482 void StmtProfiler::VisitImplicitCastExpr(const ImplicitCastExpr *S) {
483   VisitCastExpr(S);
484   ID.AddInteger(S->getValueKind());
485 }
486 
487 void StmtProfiler::VisitExplicitCastExpr(const ExplicitCastExpr *S) {
488   VisitCastExpr(S);
489   VisitType(S->getTypeAsWritten());
490 }
491 
492 void StmtProfiler::VisitCStyleCastExpr(const CStyleCastExpr *S) {
493   VisitExplicitCastExpr(S);
494 }
495 
496 void StmtProfiler::VisitBinaryOperator(const BinaryOperator *S) {
497   VisitExpr(S);
498   ID.AddInteger(S->getOpcode());
499 }
500 
501 void
502 StmtProfiler::VisitCompoundAssignOperator(const CompoundAssignOperator *S) {
503   VisitBinaryOperator(S);
504 }
505 
506 void StmtProfiler::VisitConditionalOperator(const ConditionalOperator *S) {
507   VisitExpr(S);
508 }
509 
510 void StmtProfiler::VisitBinaryConditionalOperator(
511     const BinaryConditionalOperator *S) {
512   VisitExpr(S);
513 }
514 
515 void StmtProfiler::VisitAddrLabelExpr(const AddrLabelExpr *S) {
516   VisitExpr(S);
517   VisitDecl(S->getLabel());
518 }
519 
520 void StmtProfiler::VisitStmtExpr(const StmtExpr *S) {
521   VisitExpr(S);
522 }
523 
524 void StmtProfiler::VisitShuffleVectorExpr(const ShuffleVectorExpr *S) {
525   VisitExpr(S);
526 }
527 
528 void StmtProfiler::VisitConvertVectorExpr(const ConvertVectorExpr *S) {
529   VisitExpr(S);
530 }
531 
532 void StmtProfiler::VisitChooseExpr(const ChooseExpr *S) {
533   VisitExpr(S);
534 }
535 
536 void StmtProfiler::VisitGNUNullExpr(const GNUNullExpr *S) {
537   VisitExpr(S);
538 }
539 
540 void StmtProfiler::VisitVAArgExpr(const VAArgExpr *S) {
541   VisitExpr(S);
542 }
543 
544 void StmtProfiler::VisitInitListExpr(const InitListExpr *S) {
545   if (S->getSyntacticForm()) {
546     VisitInitListExpr(S->getSyntacticForm());
547     return;
548   }
549 
550   VisitExpr(S);
551 }
552 
553 void StmtProfiler::VisitDesignatedInitExpr(const DesignatedInitExpr *S) {
554   VisitExpr(S);
555   ID.AddBoolean(S->usesGNUSyntax());
556   for (DesignatedInitExpr::const_designators_iterator D =
557          S->designators_begin(), DEnd = S->designators_end();
558        D != DEnd; ++D) {
559     if (D->isFieldDesignator()) {
560       ID.AddInteger(0);
561       VisitName(D->getFieldName());
562       continue;
563     }
564 
565     if (D->isArrayDesignator()) {
566       ID.AddInteger(1);
567     } else {
568       assert(D->isArrayRangeDesignator());
569       ID.AddInteger(2);
570     }
571     ID.AddInteger(D->getFirstExprIndex());
572   }
573 }
574 
575 void StmtProfiler::VisitImplicitValueInitExpr(const ImplicitValueInitExpr *S) {
576   VisitExpr(S);
577 }
578 
579 void StmtProfiler::VisitExtVectorElementExpr(const ExtVectorElementExpr *S) {
580   VisitExpr(S);
581   VisitName(&S->getAccessor());
582 }
583 
584 void StmtProfiler::VisitBlockExpr(const BlockExpr *S) {
585   VisitExpr(S);
586   VisitDecl(S->getBlockDecl());
587 }
588 
589 void StmtProfiler::VisitGenericSelectionExpr(const GenericSelectionExpr *S) {
590   VisitExpr(S);
591   for (unsigned i = 0; i != S->getNumAssocs(); ++i) {
592     QualType T = S->getAssocType(i);
593     if (T.isNull())
594       ID.AddPointer(nullptr);
595     else
596       VisitType(T);
597     VisitExpr(S->getAssocExpr(i));
598   }
599 }
600 
601 void StmtProfiler::VisitPseudoObjectExpr(const PseudoObjectExpr *S) {
602   VisitExpr(S);
603   for (PseudoObjectExpr::const_semantics_iterator
604          i = S->semantics_begin(), e = S->semantics_end(); i != e; ++i)
605     // Normally, we would not profile the source expressions of OVEs.
606     if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(*i))
607       Visit(OVE->getSourceExpr());
608 }
609 
610 void StmtProfiler::VisitAtomicExpr(const AtomicExpr *S) {
611   VisitExpr(S);
612   ID.AddInteger(S->getOp());
613 }
614 
615 static Stmt::StmtClass DecodeOperatorCall(const CXXOperatorCallExpr *S,
616                                           UnaryOperatorKind &UnaryOp,
617                                           BinaryOperatorKind &BinaryOp) {
618   switch (S->getOperator()) {
619   case OO_None:
620   case OO_New:
621   case OO_Delete:
622   case OO_Array_New:
623   case OO_Array_Delete:
624   case OO_Arrow:
625   case OO_Call:
626   case OO_Conditional:
627   case NUM_OVERLOADED_OPERATORS:
628     llvm_unreachable("Invalid operator call kind");
629 
630   case OO_Plus:
631     if (S->getNumArgs() == 1) {
632       UnaryOp = UO_Plus;
633       return Stmt::UnaryOperatorClass;
634     }
635 
636     BinaryOp = BO_Add;
637     return Stmt::BinaryOperatorClass;
638 
639   case OO_Minus:
640     if (S->getNumArgs() == 1) {
641       UnaryOp = UO_Minus;
642       return Stmt::UnaryOperatorClass;
643     }
644 
645     BinaryOp = BO_Sub;
646     return Stmt::BinaryOperatorClass;
647 
648   case OO_Star:
649     if (S->getNumArgs() == 1) {
650       UnaryOp = UO_Deref;
651       return Stmt::UnaryOperatorClass;
652     }
653 
654     BinaryOp = BO_Mul;
655     return Stmt::BinaryOperatorClass;
656 
657   case OO_Slash:
658     BinaryOp = BO_Div;
659     return Stmt::BinaryOperatorClass;
660 
661   case OO_Percent:
662     BinaryOp = BO_Rem;
663     return Stmt::BinaryOperatorClass;
664 
665   case OO_Caret:
666     BinaryOp = BO_Xor;
667     return Stmt::BinaryOperatorClass;
668 
669   case OO_Amp:
670     if (S->getNumArgs() == 1) {
671       UnaryOp = UO_AddrOf;
672       return Stmt::UnaryOperatorClass;
673     }
674 
675     BinaryOp = BO_And;
676     return Stmt::BinaryOperatorClass;
677 
678   case OO_Pipe:
679     BinaryOp = BO_Or;
680     return Stmt::BinaryOperatorClass;
681 
682   case OO_Tilde:
683     UnaryOp = UO_Not;
684     return Stmt::UnaryOperatorClass;
685 
686   case OO_Exclaim:
687     UnaryOp = UO_LNot;
688     return Stmt::UnaryOperatorClass;
689 
690   case OO_Equal:
691     BinaryOp = BO_Assign;
692     return Stmt::BinaryOperatorClass;
693 
694   case OO_Less:
695     BinaryOp = BO_LT;
696     return Stmt::BinaryOperatorClass;
697 
698   case OO_Greater:
699     BinaryOp = BO_GT;
700     return Stmt::BinaryOperatorClass;
701 
702   case OO_PlusEqual:
703     BinaryOp = BO_AddAssign;
704     return Stmt::CompoundAssignOperatorClass;
705 
706   case OO_MinusEqual:
707     BinaryOp = BO_SubAssign;
708     return Stmt::CompoundAssignOperatorClass;
709 
710   case OO_StarEqual:
711     BinaryOp = BO_MulAssign;
712     return Stmt::CompoundAssignOperatorClass;
713 
714   case OO_SlashEqual:
715     BinaryOp = BO_DivAssign;
716     return Stmt::CompoundAssignOperatorClass;
717 
718   case OO_PercentEqual:
719     BinaryOp = BO_RemAssign;
720     return Stmt::CompoundAssignOperatorClass;
721 
722   case OO_CaretEqual:
723     BinaryOp = BO_XorAssign;
724     return Stmt::CompoundAssignOperatorClass;
725 
726   case OO_AmpEqual:
727     BinaryOp = BO_AndAssign;
728     return Stmt::CompoundAssignOperatorClass;
729 
730   case OO_PipeEqual:
731     BinaryOp = BO_OrAssign;
732     return Stmt::CompoundAssignOperatorClass;
733 
734   case OO_LessLess:
735     BinaryOp = BO_Shl;
736     return Stmt::BinaryOperatorClass;
737 
738   case OO_GreaterGreater:
739     BinaryOp = BO_Shr;
740     return Stmt::BinaryOperatorClass;
741 
742   case OO_LessLessEqual:
743     BinaryOp = BO_ShlAssign;
744     return Stmt::CompoundAssignOperatorClass;
745 
746   case OO_GreaterGreaterEqual:
747     BinaryOp = BO_ShrAssign;
748     return Stmt::CompoundAssignOperatorClass;
749 
750   case OO_EqualEqual:
751     BinaryOp = BO_EQ;
752     return Stmt::BinaryOperatorClass;
753 
754   case OO_ExclaimEqual:
755     BinaryOp = BO_NE;
756     return Stmt::BinaryOperatorClass;
757 
758   case OO_LessEqual:
759     BinaryOp = BO_LE;
760     return Stmt::BinaryOperatorClass;
761 
762   case OO_GreaterEqual:
763     BinaryOp = BO_GE;
764     return Stmt::BinaryOperatorClass;
765 
766   case OO_AmpAmp:
767     BinaryOp = BO_LAnd;
768     return Stmt::BinaryOperatorClass;
769 
770   case OO_PipePipe:
771     BinaryOp = BO_LOr;
772     return Stmt::BinaryOperatorClass;
773 
774   case OO_PlusPlus:
775     UnaryOp = S->getNumArgs() == 1? UO_PreInc
776                                   : UO_PostInc;
777     return Stmt::UnaryOperatorClass;
778 
779   case OO_MinusMinus:
780     UnaryOp = S->getNumArgs() == 1? UO_PreDec
781                                   : UO_PostDec;
782     return Stmt::UnaryOperatorClass;
783 
784   case OO_Comma:
785     BinaryOp = BO_Comma;
786     return Stmt::BinaryOperatorClass;
787 
788 
789   case OO_ArrowStar:
790     BinaryOp = BO_PtrMemI;
791     return Stmt::BinaryOperatorClass;
792 
793   case OO_Subscript:
794     return Stmt::ArraySubscriptExprClass;
795   }
796 
797   llvm_unreachable("Invalid overloaded operator expression");
798 }
799 
800 
801 void StmtProfiler::VisitCXXOperatorCallExpr(const CXXOperatorCallExpr *S) {
802   if (S->isTypeDependent()) {
803     // Type-dependent operator calls are profiled like their underlying
804     // syntactic operator.
805     UnaryOperatorKind UnaryOp = UO_Extension;
806     BinaryOperatorKind BinaryOp = BO_Comma;
807     Stmt::StmtClass SC = DecodeOperatorCall(S, UnaryOp, BinaryOp);
808 
809     ID.AddInteger(SC);
810     for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
811       Visit(S->getArg(I));
812     if (SC == Stmt::UnaryOperatorClass)
813       ID.AddInteger(UnaryOp);
814     else if (SC == Stmt::BinaryOperatorClass ||
815              SC == Stmt::CompoundAssignOperatorClass)
816       ID.AddInteger(BinaryOp);
817     else
818       assert(SC == Stmt::ArraySubscriptExprClass);
819 
820     return;
821   }
822 
823   VisitCallExpr(S);
824   ID.AddInteger(S->getOperator());
825 }
826 
827 void StmtProfiler::VisitCXXMemberCallExpr(const CXXMemberCallExpr *S) {
828   VisitCallExpr(S);
829 }
830 
831 void StmtProfiler::VisitCUDAKernelCallExpr(const CUDAKernelCallExpr *S) {
832   VisitCallExpr(S);
833 }
834 
835 void StmtProfiler::VisitAsTypeExpr(const AsTypeExpr *S) {
836   VisitExpr(S);
837 }
838 
839 void StmtProfiler::VisitCXXNamedCastExpr(const CXXNamedCastExpr *S) {
840   VisitExplicitCastExpr(S);
841 }
842 
843 void StmtProfiler::VisitCXXStaticCastExpr(const CXXStaticCastExpr *S) {
844   VisitCXXNamedCastExpr(S);
845 }
846 
847 void StmtProfiler::VisitCXXDynamicCastExpr(const CXXDynamicCastExpr *S) {
848   VisitCXXNamedCastExpr(S);
849 }
850 
851 void
852 StmtProfiler::VisitCXXReinterpretCastExpr(const CXXReinterpretCastExpr *S) {
853   VisitCXXNamedCastExpr(S);
854 }
855 
856 void StmtProfiler::VisitCXXConstCastExpr(const CXXConstCastExpr *S) {
857   VisitCXXNamedCastExpr(S);
858 }
859 
860 void StmtProfiler::VisitUserDefinedLiteral(const UserDefinedLiteral *S) {
861   VisitCallExpr(S);
862 }
863 
864 void StmtProfiler::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *S) {
865   VisitExpr(S);
866   ID.AddBoolean(S->getValue());
867 }
868 
869 void StmtProfiler::VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *S) {
870   VisitExpr(S);
871 }
872 
873 void StmtProfiler::VisitCXXStdInitializerListExpr(
874     const CXXStdInitializerListExpr *S) {
875   VisitExpr(S);
876 }
877 
878 void StmtProfiler::VisitCXXTypeidExpr(const CXXTypeidExpr *S) {
879   VisitExpr(S);
880   if (S->isTypeOperand())
881     VisitType(S->getTypeOperandSourceInfo()->getType());
882 }
883 
884 void StmtProfiler::VisitCXXUuidofExpr(const CXXUuidofExpr *S) {
885   VisitExpr(S);
886   if (S->isTypeOperand())
887     VisitType(S->getTypeOperandSourceInfo()->getType());
888 }
889 
890 void StmtProfiler::VisitMSPropertyRefExpr(const MSPropertyRefExpr *S) {
891   VisitExpr(S);
892   VisitDecl(S->getPropertyDecl());
893 }
894 
895 void StmtProfiler::VisitCXXThisExpr(const CXXThisExpr *S) {
896   VisitExpr(S);
897   ID.AddBoolean(S->isImplicit());
898 }
899 
900 void StmtProfiler::VisitCXXThrowExpr(const CXXThrowExpr *S) {
901   VisitExpr(S);
902 }
903 
904 void StmtProfiler::VisitCXXDefaultArgExpr(const CXXDefaultArgExpr *S) {
905   VisitExpr(S);
906   VisitDecl(S->getParam());
907 }
908 
909 void StmtProfiler::VisitCXXDefaultInitExpr(const CXXDefaultInitExpr *S) {
910   VisitExpr(S);
911   VisitDecl(S->getField());
912 }
913 
914 void StmtProfiler::VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *S) {
915   VisitExpr(S);
916   VisitDecl(
917          const_cast<CXXDestructorDecl *>(S->getTemporary()->getDestructor()));
918 }
919 
920 void StmtProfiler::VisitCXXConstructExpr(const CXXConstructExpr *S) {
921   VisitExpr(S);
922   VisitDecl(S->getConstructor());
923   ID.AddBoolean(S->isElidable());
924 }
925 
926 void StmtProfiler::VisitCXXFunctionalCastExpr(const CXXFunctionalCastExpr *S) {
927   VisitExplicitCastExpr(S);
928 }
929 
930 void
931 StmtProfiler::VisitCXXTemporaryObjectExpr(const CXXTemporaryObjectExpr *S) {
932   VisitCXXConstructExpr(S);
933 }
934 
935 void
936 StmtProfiler::VisitLambdaExpr(const LambdaExpr *S) {
937   VisitExpr(S);
938   for (LambdaExpr::capture_iterator C = S->explicit_capture_begin(),
939                                  CEnd = S->explicit_capture_end();
940        C != CEnd; ++C) {
941     ID.AddInteger(C->getCaptureKind());
942     switch (C->getCaptureKind()) {
943     case LCK_This:
944       break;
945     case LCK_ByRef:
946     case LCK_ByCopy:
947       VisitDecl(C->getCapturedVar());
948       ID.AddBoolean(C->isPackExpansion());
949       break;
950     }
951   }
952   // Note: If we actually needed to be able to match lambda
953   // expressions, we would have to consider parameters and return type
954   // here, among other things.
955   VisitStmt(S->getBody());
956 }
957 
958 void
959 StmtProfiler::VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *S) {
960   VisitExpr(S);
961 }
962 
963 void StmtProfiler::VisitCXXDeleteExpr(const CXXDeleteExpr *S) {
964   VisitExpr(S);
965   ID.AddBoolean(S->isGlobalDelete());
966   ID.AddBoolean(S->isArrayForm());
967   VisitDecl(S->getOperatorDelete());
968 }
969 
970 
971 void StmtProfiler::VisitCXXNewExpr(const CXXNewExpr *S) {
972   VisitExpr(S);
973   VisitType(S->getAllocatedType());
974   VisitDecl(S->getOperatorNew());
975   VisitDecl(S->getOperatorDelete());
976   ID.AddBoolean(S->isArray());
977   ID.AddInteger(S->getNumPlacementArgs());
978   ID.AddBoolean(S->isGlobalNew());
979   ID.AddBoolean(S->isParenTypeId());
980   ID.AddInteger(S->getInitializationStyle());
981 }
982 
983 void
984 StmtProfiler::VisitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *S) {
985   VisitExpr(S);
986   ID.AddBoolean(S->isArrow());
987   VisitNestedNameSpecifier(S->getQualifier());
988   ID.AddBoolean(S->getScopeTypeInfo() != nullptr);
989   if (S->getScopeTypeInfo())
990     VisitType(S->getScopeTypeInfo()->getType());
991   ID.AddBoolean(S->getDestroyedTypeInfo() != nullptr);
992   if (S->getDestroyedTypeInfo())
993     VisitType(S->getDestroyedType());
994   else
995     ID.AddPointer(S->getDestroyedTypeIdentifier());
996 }
997 
998 void StmtProfiler::VisitOverloadExpr(const OverloadExpr *S) {
999   VisitExpr(S);
1000   VisitNestedNameSpecifier(S->getQualifier());
1001   VisitName(S->getName());
1002   ID.AddBoolean(S->hasExplicitTemplateArgs());
1003   if (S->hasExplicitTemplateArgs())
1004     VisitTemplateArguments(S->getExplicitTemplateArgs().getTemplateArgs(),
1005                            S->getExplicitTemplateArgs().NumTemplateArgs);
1006 }
1007 
1008 void
1009 StmtProfiler::VisitUnresolvedLookupExpr(const UnresolvedLookupExpr *S) {
1010   VisitOverloadExpr(S);
1011 }
1012 
1013 void StmtProfiler::VisitTypeTraitExpr(const TypeTraitExpr *S) {
1014   VisitExpr(S);
1015   ID.AddInteger(S->getTrait());
1016   ID.AddInteger(S->getNumArgs());
1017   for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
1018     VisitType(S->getArg(I)->getType());
1019 }
1020 
1021 void StmtProfiler::VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *S) {
1022   VisitExpr(S);
1023   ID.AddInteger(S->getTrait());
1024   VisitType(S->getQueriedType());
1025 }
1026 
1027 void StmtProfiler::VisitExpressionTraitExpr(const ExpressionTraitExpr *S) {
1028   VisitExpr(S);
1029   ID.AddInteger(S->getTrait());
1030   VisitExpr(S->getQueriedExpression());
1031 }
1032 
1033 void StmtProfiler::VisitDependentScopeDeclRefExpr(
1034     const DependentScopeDeclRefExpr *S) {
1035   VisitExpr(S);
1036   VisitName(S->getDeclName());
1037   VisitNestedNameSpecifier(S->getQualifier());
1038   ID.AddBoolean(S->hasExplicitTemplateArgs());
1039   if (S->hasExplicitTemplateArgs())
1040     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1041 }
1042 
1043 void StmtProfiler::VisitExprWithCleanups(const ExprWithCleanups *S) {
1044   VisitExpr(S);
1045 }
1046 
1047 void StmtProfiler::VisitCXXUnresolvedConstructExpr(
1048     const CXXUnresolvedConstructExpr *S) {
1049   VisitExpr(S);
1050   VisitType(S->getTypeAsWritten());
1051 }
1052 
1053 void StmtProfiler::VisitCXXDependentScopeMemberExpr(
1054     const CXXDependentScopeMemberExpr *S) {
1055   ID.AddBoolean(S->isImplicitAccess());
1056   if (!S->isImplicitAccess()) {
1057     VisitExpr(S);
1058     ID.AddBoolean(S->isArrow());
1059   }
1060   VisitNestedNameSpecifier(S->getQualifier());
1061   VisitName(S->getMember());
1062   ID.AddBoolean(S->hasExplicitTemplateArgs());
1063   if (S->hasExplicitTemplateArgs())
1064     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1065 }
1066 
1067 void StmtProfiler::VisitUnresolvedMemberExpr(const UnresolvedMemberExpr *S) {
1068   ID.AddBoolean(S->isImplicitAccess());
1069   if (!S->isImplicitAccess()) {
1070     VisitExpr(S);
1071     ID.AddBoolean(S->isArrow());
1072   }
1073   VisitNestedNameSpecifier(S->getQualifier());
1074   VisitName(S->getMemberName());
1075   ID.AddBoolean(S->hasExplicitTemplateArgs());
1076   if (S->hasExplicitTemplateArgs())
1077     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1078 }
1079 
1080 void StmtProfiler::VisitCXXNoexceptExpr(const CXXNoexceptExpr *S) {
1081   VisitExpr(S);
1082 }
1083 
1084 void StmtProfiler::VisitPackExpansionExpr(const PackExpansionExpr *S) {
1085   VisitExpr(S);
1086 }
1087 
1088 void StmtProfiler::VisitSizeOfPackExpr(const SizeOfPackExpr *S) {
1089   VisitExpr(S);
1090   VisitDecl(S->getPack());
1091 }
1092 
1093 void StmtProfiler::VisitSubstNonTypeTemplateParmPackExpr(
1094     const SubstNonTypeTemplateParmPackExpr *S) {
1095   VisitExpr(S);
1096   VisitDecl(S->getParameterPack());
1097   VisitTemplateArgument(S->getArgumentPack());
1098 }
1099 
1100 void StmtProfiler::VisitSubstNonTypeTemplateParmExpr(
1101     const SubstNonTypeTemplateParmExpr *E) {
1102   // Profile exactly as the replacement expression.
1103   Visit(E->getReplacement());
1104 }
1105 
1106 void StmtProfiler::VisitFunctionParmPackExpr(const FunctionParmPackExpr *S) {
1107   VisitExpr(S);
1108   VisitDecl(S->getParameterPack());
1109   ID.AddInteger(S->getNumExpansions());
1110   for (FunctionParmPackExpr::iterator I = S->begin(), E = S->end(); I != E; ++I)
1111     VisitDecl(*I);
1112 }
1113 
1114 void StmtProfiler::VisitMaterializeTemporaryExpr(
1115                                            const MaterializeTemporaryExpr *S) {
1116   VisitExpr(S);
1117 }
1118 
1119 void StmtProfiler::VisitOpaqueValueExpr(const OpaqueValueExpr *E) {
1120   VisitExpr(E);
1121 }
1122 
1123 void StmtProfiler::VisitObjCStringLiteral(const ObjCStringLiteral *S) {
1124   VisitExpr(S);
1125 }
1126 
1127 void StmtProfiler::VisitObjCBoxedExpr(const ObjCBoxedExpr *E) {
1128   VisitExpr(E);
1129 }
1130 
1131 void StmtProfiler::VisitObjCArrayLiteral(const ObjCArrayLiteral *E) {
1132   VisitExpr(E);
1133 }
1134 
1135 void StmtProfiler::VisitObjCDictionaryLiteral(const ObjCDictionaryLiteral *E) {
1136   VisitExpr(E);
1137 }
1138 
1139 void StmtProfiler::VisitObjCEncodeExpr(const ObjCEncodeExpr *S) {
1140   VisitExpr(S);
1141   VisitType(S->getEncodedType());
1142 }
1143 
1144 void StmtProfiler::VisitObjCSelectorExpr(const ObjCSelectorExpr *S) {
1145   VisitExpr(S);
1146   VisitName(S->getSelector());
1147 }
1148 
1149 void StmtProfiler::VisitObjCProtocolExpr(const ObjCProtocolExpr *S) {
1150   VisitExpr(S);
1151   VisitDecl(S->getProtocol());
1152 }
1153 
1154 void StmtProfiler::VisitObjCIvarRefExpr(const ObjCIvarRefExpr *S) {
1155   VisitExpr(S);
1156   VisitDecl(S->getDecl());
1157   ID.AddBoolean(S->isArrow());
1158   ID.AddBoolean(S->isFreeIvar());
1159 }
1160 
1161 void StmtProfiler::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *S) {
1162   VisitExpr(S);
1163   if (S->isImplicitProperty()) {
1164     VisitDecl(S->getImplicitPropertyGetter());
1165     VisitDecl(S->getImplicitPropertySetter());
1166   } else {
1167     VisitDecl(S->getExplicitProperty());
1168   }
1169   if (S->isSuperReceiver()) {
1170     ID.AddBoolean(S->isSuperReceiver());
1171     VisitType(S->getSuperReceiverType());
1172   }
1173 }
1174 
1175 void StmtProfiler::VisitObjCSubscriptRefExpr(const ObjCSubscriptRefExpr *S) {
1176   VisitExpr(S);
1177   VisitDecl(S->getAtIndexMethodDecl());
1178   VisitDecl(S->setAtIndexMethodDecl());
1179 }
1180 
1181 void StmtProfiler::VisitObjCMessageExpr(const ObjCMessageExpr *S) {
1182   VisitExpr(S);
1183   VisitName(S->getSelector());
1184   VisitDecl(S->getMethodDecl());
1185 }
1186 
1187 void StmtProfiler::VisitObjCIsaExpr(const ObjCIsaExpr *S) {
1188   VisitExpr(S);
1189   ID.AddBoolean(S->isArrow());
1190 }
1191 
1192 void StmtProfiler::VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *S) {
1193   VisitExpr(S);
1194   ID.AddBoolean(S->getValue());
1195 }
1196 
1197 void StmtProfiler::VisitObjCIndirectCopyRestoreExpr(
1198     const ObjCIndirectCopyRestoreExpr *S) {
1199   VisitExpr(S);
1200   ID.AddBoolean(S->shouldCopy());
1201 }
1202 
1203 void StmtProfiler::VisitObjCBridgedCastExpr(const ObjCBridgedCastExpr *S) {
1204   VisitExplicitCastExpr(S);
1205   ID.AddBoolean(S->getBridgeKind());
1206 }
1207 
1208 void StmtProfiler::VisitDecl(const Decl *D) {
1209   ID.AddInteger(D? D->getKind() : 0);
1210 
1211   if (Canonical && D) {
1212     if (const NonTypeTemplateParmDecl *NTTP =
1213           dyn_cast<NonTypeTemplateParmDecl>(D)) {
1214       ID.AddInteger(NTTP->getDepth());
1215       ID.AddInteger(NTTP->getIndex());
1216       ID.AddBoolean(NTTP->isParameterPack());
1217       VisitType(NTTP->getType());
1218       return;
1219     }
1220 
1221     if (const ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D)) {
1222       // The Itanium C++ ABI uses the type, scope depth, and scope
1223       // index of a parameter when mangling expressions that involve
1224       // function parameters, so we will use the parameter's type for
1225       // establishing function parameter identity. That way, our
1226       // definition of "equivalent" (per C++ [temp.over.link]) is at
1227       // least as strong as the definition of "equivalent" used for
1228       // name mangling.
1229       VisitType(Parm->getType());
1230       ID.AddInteger(Parm->getFunctionScopeDepth());
1231       ID.AddInteger(Parm->getFunctionScopeIndex());
1232       return;
1233     }
1234 
1235     if (const TemplateTypeParmDecl *TTP =
1236           dyn_cast<TemplateTypeParmDecl>(D)) {
1237       ID.AddInteger(TTP->getDepth());
1238       ID.AddInteger(TTP->getIndex());
1239       ID.AddBoolean(TTP->isParameterPack());
1240       return;
1241     }
1242 
1243     if (const TemplateTemplateParmDecl *TTP =
1244           dyn_cast<TemplateTemplateParmDecl>(D)) {
1245       ID.AddInteger(TTP->getDepth());
1246       ID.AddInteger(TTP->getIndex());
1247       ID.AddBoolean(TTP->isParameterPack());
1248       return;
1249     }
1250   }
1251 
1252   ID.AddPointer(D? D->getCanonicalDecl() : nullptr);
1253 }
1254 
1255 void StmtProfiler::VisitType(QualType T) {
1256   if (Canonical)
1257     T = Context.getCanonicalType(T);
1258 
1259   ID.AddPointer(T.getAsOpaquePtr());
1260 }
1261 
1262 void StmtProfiler::VisitName(DeclarationName Name) {
1263   ID.AddPointer(Name.getAsOpaquePtr());
1264 }
1265 
1266 void StmtProfiler::VisitNestedNameSpecifier(NestedNameSpecifier *NNS) {
1267   if (Canonical)
1268     NNS = Context.getCanonicalNestedNameSpecifier(NNS);
1269   ID.AddPointer(NNS);
1270 }
1271 
1272 void StmtProfiler::VisitTemplateName(TemplateName Name) {
1273   if (Canonical)
1274     Name = Context.getCanonicalTemplateName(Name);
1275 
1276   Name.Profile(ID);
1277 }
1278 
1279 void StmtProfiler::VisitTemplateArguments(const TemplateArgumentLoc *Args,
1280                                           unsigned NumArgs) {
1281   ID.AddInteger(NumArgs);
1282   for (unsigned I = 0; I != NumArgs; ++I)
1283     VisitTemplateArgument(Args[I].getArgument());
1284 }
1285 
1286 void StmtProfiler::VisitTemplateArgument(const TemplateArgument &Arg) {
1287   // Mostly repetitive with TemplateArgument::Profile!
1288   ID.AddInteger(Arg.getKind());
1289   switch (Arg.getKind()) {
1290   case TemplateArgument::Null:
1291     break;
1292 
1293   case TemplateArgument::Type:
1294     VisitType(Arg.getAsType());
1295     break;
1296 
1297   case TemplateArgument::Template:
1298   case TemplateArgument::TemplateExpansion:
1299     VisitTemplateName(Arg.getAsTemplateOrTemplatePattern());
1300     break;
1301 
1302   case TemplateArgument::Declaration:
1303     VisitDecl(Arg.getAsDecl());
1304     break;
1305 
1306   case TemplateArgument::NullPtr:
1307     VisitType(Arg.getNullPtrType());
1308     break;
1309 
1310   case TemplateArgument::Integral:
1311     Arg.getAsIntegral().Profile(ID);
1312     VisitType(Arg.getIntegralType());
1313     break;
1314 
1315   case TemplateArgument::Expression:
1316     Visit(Arg.getAsExpr());
1317     break;
1318 
1319   case TemplateArgument::Pack:
1320     const TemplateArgument *Pack = Arg.pack_begin();
1321     for (unsigned i = 0, e = Arg.pack_size(); i != e; ++i)
1322       VisitTemplateArgument(Pack[i]);
1323     break;
1324   }
1325 }
1326 
1327 void Stmt::Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
1328                    bool Canonical) const {
1329   StmtProfiler Profiler(ID, Context, Canonical);
1330   Profiler.Visit(this);
1331 }
1332