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::VisitOMPDefaultClause(const OMPDefaultClause *C) { }
283 
284 template<typename T>
285 void OMPClauseProfiler::VisitOMPClauseList(T *Node) {
286   for (auto *I : Node->varlists())
287     Profiler->VisitStmt(I);
288 }
289 
290 void OMPClauseProfiler::VisitOMPPrivateClause(const OMPPrivateClause *C) {
291   VisitOMPClauseList(C);
292 }
293 void OMPClauseProfiler::VisitOMPFirstprivateClause(
294                                          const OMPFirstprivateClause *C) {
295   VisitOMPClauseList(C);
296 }
297 void OMPClauseProfiler::VisitOMPSharedClause(const OMPSharedClause *C) {
298   VisitOMPClauseList(C);
299 }
300 void OMPClauseProfiler::VisitOMPLinearClause(const OMPLinearClause *C) {
301   VisitOMPClauseList(C);
302   Profiler->VisitStmt(C->getStep());
303 }
304 void OMPClauseProfiler::VisitOMPCopyinClause(const OMPCopyinClause *C) {
305   VisitOMPClauseList(C);
306 }
307 }
308 
309 void
310 StmtProfiler::VisitOMPExecutableDirective(const OMPExecutableDirective *S) {
311   VisitStmt(S);
312   OMPClauseProfiler P(this);
313   ArrayRef<OMPClause *> Clauses = S->clauses();
314   for (ArrayRef<OMPClause *>::iterator I = Clauses.begin(), E = Clauses.end();
315        I != E; ++I)
316     if (*I)
317       P.Visit(*I);
318 }
319 
320 void StmtProfiler::VisitOMPParallelDirective(const OMPParallelDirective *S) {
321   VisitOMPExecutableDirective(S);
322 }
323 
324 void StmtProfiler::VisitOMPSimdDirective(const OMPSimdDirective *S) {
325   VisitOMPExecutableDirective(S);
326 }
327 
328 void StmtProfiler::VisitExpr(const Expr *S) {
329   VisitStmt(S);
330 }
331 
332 void StmtProfiler::VisitDeclRefExpr(const DeclRefExpr *S) {
333   VisitExpr(S);
334   if (!Canonical)
335     VisitNestedNameSpecifier(S->getQualifier());
336   VisitDecl(S->getDecl());
337   if (!Canonical)
338     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
339 }
340 
341 void StmtProfiler::VisitPredefinedExpr(const PredefinedExpr *S) {
342   VisitExpr(S);
343   ID.AddInteger(S->getIdentType());
344 }
345 
346 void StmtProfiler::VisitIntegerLiteral(const IntegerLiteral *S) {
347   VisitExpr(S);
348   S->getValue().Profile(ID);
349 }
350 
351 void StmtProfiler::VisitCharacterLiteral(const CharacterLiteral *S) {
352   VisitExpr(S);
353   ID.AddInteger(S->getKind());
354   ID.AddInteger(S->getValue());
355 }
356 
357 void StmtProfiler::VisitFloatingLiteral(const FloatingLiteral *S) {
358   VisitExpr(S);
359   S->getValue().Profile(ID);
360   ID.AddBoolean(S->isExact());
361 }
362 
363 void StmtProfiler::VisitImaginaryLiteral(const ImaginaryLiteral *S) {
364   VisitExpr(S);
365 }
366 
367 void StmtProfiler::VisitStringLiteral(const StringLiteral *S) {
368   VisitExpr(S);
369   ID.AddString(S->getBytes());
370   ID.AddInteger(S->getKind());
371 }
372 
373 void StmtProfiler::VisitParenExpr(const ParenExpr *S) {
374   VisitExpr(S);
375 }
376 
377 void StmtProfiler::VisitParenListExpr(const ParenListExpr *S) {
378   VisitExpr(S);
379 }
380 
381 void StmtProfiler::VisitUnaryOperator(const UnaryOperator *S) {
382   VisitExpr(S);
383   ID.AddInteger(S->getOpcode());
384 }
385 
386 void StmtProfiler::VisitOffsetOfExpr(const OffsetOfExpr *S) {
387   VisitType(S->getTypeSourceInfo()->getType());
388   unsigned n = S->getNumComponents();
389   for (unsigned i = 0; i < n; ++i) {
390     const OffsetOfExpr::OffsetOfNode& ON = S->getComponent(i);
391     ID.AddInteger(ON.getKind());
392     switch (ON.getKind()) {
393     case OffsetOfExpr::OffsetOfNode::Array:
394       // Expressions handled below.
395       break;
396 
397     case OffsetOfExpr::OffsetOfNode::Field:
398       VisitDecl(ON.getField());
399       break;
400 
401     case OffsetOfExpr::OffsetOfNode::Identifier:
402       ID.AddPointer(ON.getFieldName());
403       break;
404 
405     case OffsetOfExpr::OffsetOfNode::Base:
406       // These nodes are implicit, and therefore don't need profiling.
407       break;
408     }
409   }
410 
411   VisitExpr(S);
412 }
413 
414 void
415 StmtProfiler::VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *S) {
416   VisitExpr(S);
417   ID.AddInteger(S->getKind());
418   if (S->isArgumentType())
419     VisitType(S->getArgumentType());
420 }
421 
422 void StmtProfiler::VisitArraySubscriptExpr(const ArraySubscriptExpr *S) {
423   VisitExpr(S);
424 }
425 
426 void StmtProfiler::VisitCallExpr(const CallExpr *S) {
427   VisitExpr(S);
428 }
429 
430 void StmtProfiler::VisitMemberExpr(const MemberExpr *S) {
431   VisitExpr(S);
432   VisitDecl(S->getMemberDecl());
433   if (!Canonical)
434     VisitNestedNameSpecifier(S->getQualifier());
435   ID.AddBoolean(S->isArrow());
436 }
437 
438 void StmtProfiler::VisitCompoundLiteralExpr(const CompoundLiteralExpr *S) {
439   VisitExpr(S);
440   ID.AddBoolean(S->isFileScope());
441 }
442 
443 void StmtProfiler::VisitCastExpr(const CastExpr *S) {
444   VisitExpr(S);
445 }
446 
447 void StmtProfiler::VisitImplicitCastExpr(const ImplicitCastExpr *S) {
448   VisitCastExpr(S);
449   ID.AddInteger(S->getValueKind());
450 }
451 
452 void StmtProfiler::VisitExplicitCastExpr(const ExplicitCastExpr *S) {
453   VisitCastExpr(S);
454   VisitType(S->getTypeAsWritten());
455 }
456 
457 void StmtProfiler::VisitCStyleCastExpr(const CStyleCastExpr *S) {
458   VisitExplicitCastExpr(S);
459 }
460 
461 void StmtProfiler::VisitBinaryOperator(const BinaryOperator *S) {
462   VisitExpr(S);
463   ID.AddInteger(S->getOpcode());
464 }
465 
466 void
467 StmtProfiler::VisitCompoundAssignOperator(const CompoundAssignOperator *S) {
468   VisitBinaryOperator(S);
469 }
470 
471 void StmtProfiler::VisitConditionalOperator(const ConditionalOperator *S) {
472   VisitExpr(S);
473 }
474 
475 void StmtProfiler::VisitBinaryConditionalOperator(
476     const BinaryConditionalOperator *S) {
477   VisitExpr(S);
478 }
479 
480 void StmtProfiler::VisitAddrLabelExpr(const AddrLabelExpr *S) {
481   VisitExpr(S);
482   VisitDecl(S->getLabel());
483 }
484 
485 void StmtProfiler::VisitStmtExpr(const StmtExpr *S) {
486   VisitExpr(S);
487 }
488 
489 void StmtProfiler::VisitShuffleVectorExpr(const ShuffleVectorExpr *S) {
490   VisitExpr(S);
491 }
492 
493 void StmtProfiler::VisitConvertVectorExpr(const ConvertVectorExpr *S) {
494   VisitExpr(S);
495 }
496 
497 void StmtProfiler::VisitChooseExpr(const ChooseExpr *S) {
498   VisitExpr(S);
499 }
500 
501 void StmtProfiler::VisitGNUNullExpr(const GNUNullExpr *S) {
502   VisitExpr(S);
503 }
504 
505 void StmtProfiler::VisitVAArgExpr(const VAArgExpr *S) {
506   VisitExpr(S);
507 }
508 
509 void StmtProfiler::VisitInitListExpr(const InitListExpr *S) {
510   if (S->getSyntacticForm()) {
511     VisitInitListExpr(S->getSyntacticForm());
512     return;
513   }
514 
515   VisitExpr(S);
516 }
517 
518 void StmtProfiler::VisitDesignatedInitExpr(const DesignatedInitExpr *S) {
519   VisitExpr(S);
520   ID.AddBoolean(S->usesGNUSyntax());
521   for (DesignatedInitExpr::const_designators_iterator D =
522          S->designators_begin(), DEnd = S->designators_end();
523        D != DEnd; ++D) {
524     if (D->isFieldDesignator()) {
525       ID.AddInteger(0);
526       VisitName(D->getFieldName());
527       continue;
528     }
529 
530     if (D->isArrayDesignator()) {
531       ID.AddInteger(1);
532     } else {
533       assert(D->isArrayRangeDesignator());
534       ID.AddInteger(2);
535     }
536     ID.AddInteger(D->getFirstExprIndex());
537   }
538 }
539 
540 void StmtProfiler::VisitImplicitValueInitExpr(const ImplicitValueInitExpr *S) {
541   VisitExpr(S);
542 }
543 
544 void StmtProfiler::VisitExtVectorElementExpr(const ExtVectorElementExpr *S) {
545   VisitExpr(S);
546   VisitName(&S->getAccessor());
547 }
548 
549 void StmtProfiler::VisitBlockExpr(const BlockExpr *S) {
550   VisitExpr(S);
551   VisitDecl(S->getBlockDecl());
552 }
553 
554 void StmtProfiler::VisitGenericSelectionExpr(const GenericSelectionExpr *S) {
555   VisitExpr(S);
556   for (unsigned i = 0; i != S->getNumAssocs(); ++i) {
557     QualType T = S->getAssocType(i);
558     if (T.isNull())
559       ID.AddPointer(0);
560     else
561       VisitType(T);
562     VisitExpr(S->getAssocExpr(i));
563   }
564 }
565 
566 void StmtProfiler::VisitPseudoObjectExpr(const PseudoObjectExpr *S) {
567   VisitExpr(S);
568   for (PseudoObjectExpr::const_semantics_iterator
569          i = S->semantics_begin(), e = S->semantics_end(); i != e; ++i)
570     // Normally, we would not profile the source expressions of OVEs.
571     if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(*i))
572       Visit(OVE->getSourceExpr());
573 }
574 
575 void StmtProfiler::VisitAtomicExpr(const AtomicExpr *S) {
576   VisitExpr(S);
577   ID.AddInteger(S->getOp());
578 }
579 
580 static Stmt::StmtClass DecodeOperatorCall(const CXXOperatorCallExpr *S,
581                                           UnaryOperatorKind &UnaryOp,
582                                           BinaryOperatorKind &BinaryOp) {
583   switch (S->getOperator()) {
584   case OO_None:
585   case OO_New:
586   case OO_Delete:
587   case OO_Array_New:
588   case OO_Array_Delete:
589   case OO_Arrow:
590   case OO_Call:
591   case OO_Conditional:
592   case NUM_OVERLOADED_OPERATORS:
593     llvm_unreachable("Invalid operator call kind");
594 
595   case OO_Plus:
596     if (S->getNumArgs() == 1) {
597       UnaryOp = UO_Plus;
598       return Stmt::UnaryOperatorClass;
599     }
600 
601     BinaryOp = BO_Add;
602     return Stmt::BinaryOperatorClass;
603 
604   case OO_Minus:
605     if (S->getNumArgs() == 1) {
606       UnaryOp = UO_Minus;
607       return Stmt::UnaryOperatorClass;
608     }
609 
610     BinaryOp = BO_Sub;
611     return Stmt::BinaryOperatorClass;
612 
613   case OO_Star:
614     if (S->getNumArgs() == 1) {
615       UnaryOp = UO_Minus;
616       return Stmt::UnaryOperatorClass;
617     }
618 
619     BinaryOp = BO_Sub;
620     return Stmt::BinaryOperatorClass;
621 
622   case OO_Slash:
623     BinaryOp = BO_Div;
624     return Stmt::BinaryOperatorClass;
625 
626   case OO_Percent:
627     BinaryOp = BO_Rem;
628     return Stmt::BinaryOperatorClass;
629 
630   case OO_Caret:
631     BinaryOp = BO_Xor;
632     return Stmt::BinaryOperatorClass;
633 
634   case OO_Amp:
635     if (S->getNumArgs() == 1) {
636       UnaryOp = UO_AddrOf;
637       return Stmt::UnaryOperatorClass;
638     }
639 
640     BinaryOp = BO_And;
641     return Stmt::BinaryOperatorClass;
642 
643   case OO_Pipe:
644     BinaryOp = BO_Or;
645     return Stmt::BinaryOperatorClass;
646 
647   case OO_Tilde:
648     UnaryOp = UO_Not;
649     return Stmt::UnaryOperatorClass;
650 
651   case OO_Exclaim:
652     UnaryOp = UO_LNot;
653     return Stmt::UnaryOperatorClass;
654 
655   case OO_Equal:
656     BinaryOp = BO_Assign;
657     return Stmt::BinaryOperatorClass;
658 
659   case OO_Less:
660     BinaryOp = BO_LT;
661     return Stmt::BinaryOperatorClass;
662 
663   case OO_Greater:
664     BinaryOp = BO_GT;
665     return Stmt::BinaryOperatorClass;
666 
667   case OO_PlusEqual:
668     BinaryOp = BO_AddAssign;
669     return Stmt::CompoundAssignOperatorClass;
670 
671   case OO_MinusEqual:
672     BinaryOp = BO_SubAssign;
673     return Stmt::CompoundAssignOperatorClass;
674 
675   case OO_StarEqual:
676     BinaryOp = BO_MulAssign;
677     return Stmt::CompoundAssignOperatorClass;
678 
679   case OO_SlashEqual:
680     BinaryOp = BO_DivAssign;
681     return Stmt::CompoundAssignOperatorClass;
682 
683   case OO_PercentEqual:
684     BinaryOp = BO_RemAssign;
685     return Stmt::CompoundAssignOperatorClass;
686 
687   case OO_CaretEqual:
688     BinaryOp = BO_XorAssign;
689     return Stmt::CompoundAssignOperatorClass;
690 
691   case OO_AmpEqual:
692     BinaryOp = BO_AndAssign;
693     return Stmt::CompoundAssignOperatorClass;
694 
695   case OO_PipeEqual:
696     BinaryOp = BO_OrAssign;
697     return Stmt::CompoundAssignOperatorClass;
698 
699   case OO_LessLess:
700     BinaryOp = BO_Shl;
701     return Stmt::BinaryOperatorClass;
702 
703   case OO_GreaterGreater:
704     BinaryOp = BO_Shr;
705     return Stmt::BinaryOperatorClass;
706 
707   case OO_LessLessEqual:
708     BinaryOp = BO_ShlAssign;
709     return Stmt::CompoundAssignOperatorClass;
710 
711   case OO_GreaterGreaterEqual:
712     BinaryOp = BO_ShrAssign;
713     return Stmt::CompoundAssignOperatorClass;
714 
715   case OO_EqualEqual:
716     BinaryOp = BO_EQ;
717     return Stmt::BinaryOperatorClass;
718 
719   case OO_ExclaimEqual:
720     BinaryOp = BO_NE;
721     return Stmt::BinaryOperatorClass;
722 
723   case OO_LessEqual:
724     BinaryOp = BO_LE;
725     return Stmt::BinaryOperatorClass;
726 
727   case OO_GreaterEqual:
728     BinaryOp = BO_GE;
729     return Stmt::BinaryOperatorClass;
730 
731   case OO_AmpAmp:
732     BinaryOp = BO_LAnd;
733     return Stmt::BinaryOperatorClass;
734 
735   case OO_PipePipe:
736     BinaryOp = BO_LOr;
737     return Stmt::BinaryOperatorClass;
738 
739   case OO_PlusPlus:
740     UnaryOp = S->getNumArgs() == 1? UO_PreInc
741                                   : UO_PostInc;
742     return Stmt::UnaryOperatorClass;
743 
744   case OO_MinusMinus:
745     UnaryOp = S->getNumArgs() == 1? UO_PreDec
746                                   : UO_PostDec;
747     return Stmt::UnaryOperatorClass;
748 
749   case OO_Comma:
750     BinaryOp = BO_Comma;
751     return Stmt::BinaryOperatorClass;
752 
753 
754   case OO_ArrowStar:
755     BinaryOp = BO_PtrMemI;
756     return Stmt::BinaryOperatorClass;
757 
758   case OO_Subscript:
759     return Stmt::ArraySubscriptExprClass;
760   }
761 
762   llvm_unreachable("Invalid overloaded operator expression");
763 }
764 
765 
766 void StmtProfiler::VisitCXXOperatorCallExpr(const CXXOperatorCallExpr *S) {
767   if (S->isTypeDependent()) {
768     // Type-dependent operator calls are profiled like their underlying
769     // syntactic operator.
770     UnaryOperatorKind UnaryOp = UO_Extension;
771     BinaryOperatorKind BinaryOp = BO_Comma;
772     Stmt::StmtClass SC = DecodeOperatorCall(S, UnaryOp, BinaryOp);
773 
774     ID.AddInteger(SC);
775     for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
776       Visit(S->getArg(I));
777     if (SC == Stmt::UnaryOperatorClass)
778       ID.AddInteger(UnaryOp);
779     else if (SC == Stmt::BinaryOperatorClass ||
780              SC == Stmt::CompoundAssignOperatorClass)
781       ID.AddInteger(BinaryOp);
782     else
783       assert(SC == Stmt::ArraySubscriptExprClass);
784 
785     return;
786   }
787 
788   VisitCallExpr(S);
789   ID.AddInteger(S->getOperator());
790 }
791 
792 void StmtProfiler::VisitCXXMemberCallExpr(const CXXMemberCallExpr *S) {
793   VisitCallExpr(S);
794 }
795 
796 void StmtProfiler::VisitCUDAKernelCallExpr(const CUDAKernelCallExpr *S) {
797   VisitCallExpr(S);
798 }
799 
800 void StmtProfiler::VisitAsTypeExpr(const AsTypeExpr *S) {
801   VisitExpr(S);
802 }
803 
804 void StmtProfiler::VisitCXXNamedCastExpr(const CXXNamedCastExpr *S) {
805   VisitExplicitCastExpr(S);
806 }
807 
808 void StmtProfiler::VisitCXXStaticCastExpr(const CXXStaticCastExpr *S) {
809   VisitCXXNamedCastExpr(S);
810 }
811 
812 void StmtProfiler::VisitCXXDynamicCastExpr(const CXXDynamicCastExpr *S) {
813   VisitCXXNamedCastExpr(S);
814 }
815 
816 void
817 StmtProfiler::VisitCXXReinterpretCastExpr(const CXXReinterpretCastExpr *S) {
818   VisitCXXNamedCastExpr(S);
819 }
820 
821 void StmtProfiler::VisitCXXConstCastExpr(const CXXConstCastExpr *S) {
822   VisitCXXNamedCastExpr(S);
823 }
824 
825 void StmtProfiler::VisitUserDefinedLiteral(const UserDefinedLiteral *S) {
826   VisitCallExpr(S);
827 }
828 
829 void StmtProfiler::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *S) {
830   VisitExpr(S);
831   ID.AddBoolean(S->getValue());
832 }
833 
834 void StmtProfiler::VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *S) {
835   VisitExpr(S);
836 }
837 
838 void StmtProfiler::VisitCXXStdInitializerListExpr(
839     const CXXStdInitializerListExpr *S) {
840   VisitExpr(S);
841 }
842 
843 void StmtProfiler::VisitCXXTypeidExpr(const CXXTypeidExpr *S) {
844   VisitExpr(S);
845   if (S->isTypeOperand())
846     VisitType(S->getTypeOperandSourceInfo()->getType());
847 }
848 
849 void StmtProfiler::VisitCXXUuidofExpr(const CXXUuidofExpr *S) {
850   VisitExpr(S);
851   if (S->isTypeOperand())
852     VisitType(S->getTypeOperandSourceInfo()->getType());
853 }
854 
855 void StmtProfiler::VisitMSPropertyRefExpr(const MSPropertyRefExpr *S) {
856   VisitExpr(S);
857   VisitDecl(S->getPropertyDecl());
858 }
859 
860 void StmtProfiler::VisitCXXThisExpr(const CXXThisExpr *S) {
861   VisitExpr(S);
862   ID.AddBoolean(S->isImplicit());
863 }
864 
865 void StmtProfiler::VisitCXXThrowExpr(const CXXThrowExpr *S) {
866   VisitExpr(S);
867 }
868 
869 void StmtProfiler::VisitCXXDefaultArgExpr(const CXXDefaultArgExpr *S) {
870   VisitExpr(S);
871   VisitDecl(S->getParam());
872 }
873 
874 void StmtProfiler::VisitCXXDefaultInitExpr(const CXXDefaultInitExpr *S) {
875   VisitExpr(S);
876   VisitDecl(S->getField());
877 }
878 
879 void StmtProfiler::VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *S) {
880   VisitExpr(S);
881   VisitDecl(
882          const_cast<CXXDestructorDecl *>(S->getTemporary()->getDestructor()));
883 }
884 
885 void StmtProfiler::VisitCXXConstructExpr(const CXXConstructExpr *S) {
886   VisitExpr(S);
887   VisitDecl(S->getConstructor());
888   ID.AddBoolean(S->isElidable());
889 }
890 
891 void StmtProfiler::VisitCXXFunctionalCastExpr(const CXXFunctionalCastExpr *S) {
892   VisitExplicitCastExpr(S);
893 }
894 
895 void
896 StmtProfiler::VisitCXXTemporaryObjectExpr(const CXXTemporaryObjectExpr *S) {
897   VisitCXXConstructExpr(S);
898 }
899 
900 void
901 StmtProfiler::VisitLambdaExpr(const LambdaExpr *S) {
902   VisitExpr(S);
903   for (LambdaExpr::capture_iterator C = S->explicit_capture_begin(),
904                                  CEnd = S->explicit_capture_end();
905        C != CEnd; ++C) {
906     ID.AddInteger(C->getCaptureKind());
907     switch (C->getCaptureKind()) {
908     case LCK_This:
909       break;
910     case LCK_ByRef:
911     case LCK_ByCopy:
912       VisitDecl(C->getCapturedVar());
913       ID.AddBoolean(C->isPackExpansion());
914       break;
915     }
916   }
917   // Note: If we actually needed to be able to match lambda
918   // expressions, we would have to consider parameters and return type
919   // here, among other things.
920   VisitStmt(S->getBody());
921 }
922 
923 void
924 StmtProfiler::VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *S) {
925   VisitExpr(S);
926 }
927 
928 void StmtProfiler::VisitCXXDeleteExpr(const CXXDeleteExpr *S) {
929   VisitExpr(S);
930   ID.AddBoolean(S->isGlobalDelete());
931   ID.AddBoolean(S->isArrayForm());
932   VisitDecl(S->getOperatorDelete());
933 }
934 
935 
936 void StmtProfiler::VisitCXXNewExpr(const CXXNewExpr *S) {
937   VisitExpr(S);
938   VisitType(S->getAllocatedType());
939   VisitDecl(S->getOperatorNew());
940   VisitDecl(S->getOperatorDelete());
941   ID.AddBoolean(S->isArray());
942   ID.AddInteger(S->getNumPlacementArgs());
943   ID.AddBoolean(S->isGlobalNew());
944   ID.AddBoolean(S->isParenTypeId());
945   ID.AddInteger(S->getInitializationStyle());
946 }
947 
948 void
949 StmtProfiler::VisitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *S) {
950   VisitExpr(S);
951   ID.AddBoolean(S->isArrow());
952   VisitNestedNameSpecifier(S->getQualifier());
953   ID.AddBoolean(S->getScopeTypeInfo() != 0);
954   if (S->getScopeTypeInfo())
955     VisitType(S->getScopeTypeInfo()->getType());
956   ID.AddBoolean(S->getDestroyedTypeInfo() != 0);
957   if (S->getDestroyedTypeInfo())
958     VisitType(S->getDestroyedType());
959   else
960     ID.AddPointer(S->getDestroyedTypeIdentifier());
961 }
962 
963 void StmtProfiler::VisitOverloadExpr(const OverloadExpr *S) {
964   VisitExpr(S);
965   VisitNestedNameSpecifier(S->getQualifier());
966   VisitName(S->getName());
967   ID.AddBoolean(S->hasExplicitTemplateArgs());
968   if (S->hasExplicitTemplateArgs())
969     VisitTemplateArguments(S->getExplicitTemplateArgs().getTemplateArgs(),
970                            S->getExplicitTemplateArgs().NumTemplateArgs);
971 }
972 
973 void
974 StmtProfiler::VisitUnresolvedLookupExpr(const UnresolvedLookupExpr *S) {
975   VisitOverloadExpr(S);
976 }
977 
978 void StmtProfiler::VisitTypeTraitExpr(const TypeTraitExpr *S) {
979   VisitExpr(S);
980   ID.AddInteger(S->getTrait());
981   ID.AddInteger(S->getNumArgs());
982   for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
983     VisitType(S->getArg(I)->getType());
984 }
985 
986 void StmtProfiler::VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *S) {
987   VisitExpr(S);
988   ID.AddInteger(S->getTrait());
989   VisitType(S->getQueriedType());
990 }
991 
992 void StmtProfiler::VisitExpressionTraitExpr(const ExpressionTraitExpr *S) {
993   VisitExpr(S);
994   ID.AddInteger(S->getTrait());
995   VisitExpr(S->getQueriedExpression());
996 }
997 
998 void StmtProfiler::VisitDependentScopeDeclRefExpr(
999     const DependentScopeDeclRefExpr *S) {
1000   VisitExpr(S);
1001   VisitName(S->getDeclName());
1002   VisitNestedNameSpecifier(S->getQualifier());
1003   ID.AddBoolean(S->hasExplicitTemplateArgs());
1004   if (S->hasExplicitTemplateArgs())
1005     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1006 }
1007 
1008 void StmtProfiler::VisitExprWithCleanups(const ExprWithCleanups *S) {
1009   VisitExpr(S);
1010 }
1011 
1012 void StmtProfiler::VisitCXXUnresolvedConstructExpr(
1013     const CXXUnresolvedConstructExpr *S) {
1014   VisitExpr(S);
1015   VisitType(S->getTypeAsWritten());
1016 }
1017 
1018 void StmtProfiler::VisitCXXDependentScopeMemberExpr(
1019     const CXXDependentScopeMemberExpr *S) {
1020   ID.AddBoolean(S->isImplicitAccess());
1021   if (!S->isImplicitAccess()) {
1022     VisitExpr(S);
1023     ID.AddBoolean(S->isArrow());
1024   }
1025   VisitNestedNameSpecifier(S->getQualifier());
1026   VisitName(S->getMember());
1027   ID.AddBoolean(S->hasExplicitTemplateArgs());
1028   if (S->hasExplicitTemplateArgs())
1029     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1030 }
1031 
1032 void StmtProfiler::VisitUnresolvedMemberExpr(const UnresolvedMemberExpr *S) {
1033   ID.AddBoolean(S->isImplicitAccess());
1034   if (!S->isImplicitAccess()) {
1035     VisitExpr(S);
1036     ID.AddBoolean(S->isArrow());
1037   }
1038   VisitNestedNameSpecifier(S->getQualifier());
1039   VisitName(S->getMemberName());
1040   ID.AddBoolean(S->hasExplicitTemplateArgs());
1041   if (S->hasExplicitTemplateArgs())
1042     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1043 }
1044 
1045 void StmtProfiler::VisitCXXNoexceptExpr(const CXXNoexceptExpr *S) {
1046   VisitExpr(S);
1047 }
1048 
1049 void StmtProfiler::VisitPackExpansionExpr(const PackExpansionExpr *S) {
1050   VisitExpr(S);
1051 }
1052 
1053 void StmtProfiler::VisitSizeOfPackExpr(const SizeOfPackExpr *S) {
1054   VisitExpr(S);
1055   VisitDecl(S->getPack());
1056 }
1057 
1058 void StmtProfiler::VisitSubstNonTypeTemplateParmPackExpr(
1059     const SubstNonTypeTemplateParmPackExpr *S) {
1060   VisitExpr(S);
1061   VisitDecl(S->getParameterPack());
1062   VisitTemplateArgument(S->getArgumentPack());
1063 }
1064 
1065 void StmtProfiler::VisitSubstNonTypeTemplateParmExpr(
1066     const SubstNonTypeTemplateParmExpr *E) {
1067   // Profile exactly as the replacement expression.
1068   Visit(E->getReplacement());
1069 }
1070 
1071 void StmtProfiler::VisitFunctionParmPackExpr(const FunctionParmPackExpr *S) {
1072   VisitExpr(S);
1073   VisitDecl(S->getParameterPack());
1074   ID.AddInteger(S->getNumExpansions());
1075   for (FunctionParmPackExpr::iterator I = S->begin(), E = S->end(); I != E; ++I)
1076     VisitDecl(*I);
1077 }
1078 
1079 void StmtProfiler::VisitMaterializeTemporaryExpr(
1080                                            const MaterializeTemporaryExpr *S) {
1081   VisitExpr(S);
1082 }
1083 
1084 void StmtProfiler::VisitOpaqueValueExpr(const OpaqueValueExpr *E) {
1085   VisitExpr(E);
1086 }
1087 
1088 void StmtProfiler::VisitObjCStringLiteral(const ObjCStringLiteral *S) {
1089   VisitExpr(S);
1090 }
1091 
1092 void StmtProfiler::VisitObjCBoxedExpr(const ObjCBoxedExpr *E) {
1093   VisitExpr(E);
1094 }
1095 
1096 void StmtProfiler::VisitObjCArrayLiteral(const ObjCArrayLiteral *E) {
1097   VisitExpr(E);
1098 }
1099 
1100 void StmtProfiler::VisitObjCDictionaryLiteral(const ObjCDictionaryLiteral *E) {
1101   VisitExpr(E);
1102 }
1103 
1104 void StmtProfiler::VisitObjCEncodeExpr(const ObjCEncodeExpr *S) {
1105   VisitExpr(S);
1106   VisitType(S->getEncodedType());
1107 }
1108 
1109 void StmtProfiler::VisitObjCSelectorExpr(const ObjCSelectorExpr *S) {
1110   VisitExpr(S);
1111   VisitName(S->getSelector());
1112 }
1113 
1114 void StmtProfiler::VisitObjCProtocolExpr(const ObjCProtocolExpr *S) {
1115   VisitExpr(S);
1116   VisitDecl(S->getProtocol());
1117 }
1118 
1119 void StmtProfiler::VisitObjCIvarRefExpr(const ObjCIvarRefExpr *S) {
1120   VisitExpr(S);
1121   VisitDecl(S->getDecl());
1122   ID.AddBoolean(S->isArrow());
1123   ID.AddBoolean(S->isFreeIvar());
1124 }
1125 
1126 void StmtProfiler::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *S) {
1127   VisitExpr(S);
1128   if (S->isImplicitProperty()) {
1129     VisitDecl(S->getImplicitPropertyGetter());
1130     VisitDecl(S->getImplicitPropertySetter());
1131   } else {
1132     VisitDecl(S->getExplicitProperty());
1133   }
1134   if (S->isSuperReceiver()) {
1135     ID.AddBoolean(S->isSuperReceiver());
1136     VisitType(S->getSuperReceiverType());
1137   }
1138 }
1139 
1140 void StmtProfiler::VisitObjCSubscriptRefExpr(const ObjCSubscriptRefExpr *S) {
1141   VisitExpr(S);
1142   VisitDecl(S->getAtIndexMethodDecl());
1143   VisitDecl(S->setAtIndexMethodDecl());
1144 }
1145 
1146 void StmtProfiler::VisitObjCMessageExpr(const ObjCMessageExpr *S) {
1147   VisitExpr(S);
1148   VisitName(S->getSelector());
1149   VisitDecl(S->getMethodDecl());
1150 }
1151 
1152 void StmtProfiler::VisitObjCIsaExpr(const ObjCIsaExpr *S) {
1153   VisitExpr(S);
1154   ID.AddBoolean(S->isArrow());
1155 }
1156 
1157 void StmtProfiler::VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *S) {
1158   VisitExpr(S);
1159   ID.AddBoolean(S->getValue());
1160 }
1161 
1162 void StmtProfiler::VisitObjCIndirectCopyRestoreExpr(
1163     const ObjCIndirectCopyRestoreExpr *S) {
1164   VisitExpr(S);
1165   ID.AddBoolean(S->shouldCopy());
1166 }
1167 
1168 void StmtProfiler::VisitObjCBridgedCastExpr(const ObjCBridgedCastExpr *S) {
1169   VisitExplicitCastExpr(S);
1170   ID.AddBoolean(S->getBridgeKind());
1171 }
1172 
1173 void StmtProfiler::VisitDecl(const Decl *D) {
1174   ID.AddInteger(D? D->getKind() : 0);
1175 
1176   if (Canonical && D) {
1177     if (const NonTypeTemplateParmDecl *NTTP =
1178           dyn_cast<NonTypeTemplateParmDecl>(D)) {
1179       ID.AddInteger(NTTP->getDepth());
1180       ID.AddInteger(NTTP->getIndex());
1181       ID.AddBoolean(NTTP->isParameterPack());
1182       VisitType(NTTP->getType());
1183       return;
1184     }
1185 
1186     if (const ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D)) {
1187       // The Itanium C++ ABI uses the type, scope depth, and scope
1188       // index of a parameter when mangling expressions that involve
1189       // function parameters, so we will use the parameter's type for
1190       // establishing function parameter identity. That way, our
1191       // definition of "equivalent" (per C++ [temp.over.link]) is at
1192       // least as strong as the definition of "equivalent" used for
1193       // name mangling.
1194       VisitType(Parm->getType());
1195       ID.AddInteger(Parm->getFunctionScopeDepth());
1196       ID.AddInteger(Parm->getFunctionScopeIndex());
1197       return;
1198     }
1199 
1200     if (const TemplateTypeParmDecl *TTP =
1201           dyn_cast<TemplateTypeParmDecl>(D)) {
1202       ID.AddInteger(TTP->getDepth());
1203       ID.AddInteger(TTP->getIndex());
1204       ID.AddBoolean(TTP->isParameterPack());
1205       return;
1206     }
1207 
1208     if (const TemplateTemplateParmDecl *TTP =
1209           dyn_cast<TemplateTemplateParmDecl>(D)) {
1210       ID.AddInteger(TTP->getDepth());
1211       ID.AddInteger(TTP->getIndex());
1212       ID.AddBoolean(TTP->isParameterPack());
1213       return;
1214     }
1215   }
1216 
1217   ID.AddPointer(D? D->getCanonicalDecl() : 0);
1218 }
1219 
1220 void StmtProfiler::VisitType(QualType T) {
1221   if (Canonical)
1222     T = Context.getCanonicalType(T);
1223 
1224   ID.AddPointer(T.getAsOpaquePtr());
1225 }
1226 
1227 void StmtProfiler::VisitName(DeclarationName Name) {
1228   ID.AddPointer(Name.getAsOpaquePtr());
1229 }
1230 
1231 void StmtProfiler::VisitNestedNameSpecifier(NestedNameSpecifier *NNS) {
1232   if (Canonical)
1233     NNS = Context.getCanonicalNestedNameSpecifier(NNS);
1234   ID.AddPointer(NNS);
1235 }
1236 
1237 void StmtProfiler::VisitTemplateName(TemplateName Name) {
1238   if (Canonical)
1239     Name = Context.getCanonicalTemplateName(Name);
1240 
1241   Name.Profile(ID);
1242 }
1243 
1244 void StmtProfiler::VisitTemplateArguments(const TemplateArgumentLoc *Args,
1245                                           unsigned NumArgs) {
1246   ID.AddInteger(NumArgs);
1247   for (unsigned I = 0; I != NumArgs; ++I)
1248     VisitTemplateArgument(Args[I].getArgument());
1249 }
1250 
1251 void StmtProfiler::VisitTemplateArgument(const TemplateArgument &Arg) {
1252   // Mostly repetitive with TemplateArgument::Profile!
1253   ID.AddInteger(Arg.getKind());
1254   switch (Arg.getKind()) {
1255   case TemplateArgument::Null:
1256     break;
1257 
1258   case TemplateArgument::Type:
1259     VisitType(Arg.getAsType());
1260     break;
1261 
1262   case TemplateArgument::Template:
1263   case TemplateArgument::TemplateExpansion:
1264     VisitTemplateName(Arg.getAsTemplateOrTemplatePattern());
1265     break;
1266 
1267   case TemplateArgument::Declaration:
1268     VisitDecl(Arg.getAsDecl());
1269     break;
1270 
1271   case TemplateArgument::NullPtr:
1272     VisitType(Arg.getNullPtrType());
1273     break;
1274 
1275   case TemplateArgument::Integral:
1276     Arg.getAsIntegral().Profile(ID);
1277     VisitType(Arg.getIntegralType());
1278     break;
1279 
1280   case TemplateArgument::Expression:
1281     Visit(Arg.getAsExpr());
1282     break;
1283 
1284   case TemplateArgument::Pack:
1285     const TemplateArgument *Pack = Arg.pack_begin();
1286     for (unsigned i = 0, e = Arg.pack_size(); i != e; ++i)
1287       VisitTemplateArgument(Pack[i]);
1288     break;
1289   }
1290 }
1291 
1292 void Stmt::Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
1293                    bool Canonical) const {
1294   StmtProfiler Profiler(ID, Context, Canonical);
1295   Profiler.Visit(this);
1296 }
1297