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::VisitSEHLeaveStmt(const SEHLeaveStmt *S) {
218   VisitStmt(S);
219 }
220 
221 void StmtProfiler::VisitCapturedStmt(const CapturedStmt *S) {
222   VisitStmt(S);
223 }
224 
225 void StmtProfiler::VisitObjCForCollectionStmt(const ObjCForCollectionStmt *S) {
226   VisitStmt(S);
227 }
228 
229 void StmtProfiler::VisitObjCAtCatchStmt(const ObjCAtCatchStmt *S) {
230   VisitStmt(S);
231   ID.AddBoolean(S->hasEllipsis());
232   if (S->getCatchParamDecl())
233     VisitType(S->getCatchParamDecl()->getType());
234 }
235 
236 void StmtProfiler::VisitObjCAtFinallyStmt(const ObjCAtFinallyStmt *S) {
237   VisitStmt(S);
238 }
239 
240 void StmtProfiler::VisitObjCAtTryStmt(const ObjCAtTryStmt *S) {
241   VisitStmt(S);
242 }
243 
244 void
245 StmtProfiler::VisitObjCAtSynchronizedStmt(const ObjCAtSynchronizedStmt *S) {
246   VisitStmt(S);
247 }
248 
249 void StmtProfiler::VisitObjCAtThrowStmt(const ObjCAtThrowStmt *S) {
250   VisitStmt(S);
251 }
252 
253 void
254 StmtProfiler::VisitObjCAutoreleasePoolStmt(const ObjCAutoreleasePoolStmt *S) {
255   VisitStmt(S);
256 }
257 
258 namespace {
259 class OMPClauseProfiler : public ConstOMPClauseVisitor<OMPClauseProfiler> {
260   StmtProfiler *Profiler;
261   /// \brief Process clauses with list of variables.
262   template <typename T>
263   void VisitOMPClauseList(T *Node);
264 public:
265   OMPClauseProfiler(StmtProfiler *P) : Profiler(P) { }
266 #define OPENMP_CLAUSE(Name, Class)                                             \
267   void Visit##Class(const Class *C);
268 #include "clang/Basic/OpenMPKinds.def"
269 };
270 
271 void OMPClauseProfiler::VisitOMPIfClause(const OMPIfClause *C) {
272   if (C->getCondition())
273     Profiler->VisitStmt(C->getCondition());
274 }
275 
276 void OMPClauseProfiler::VisitOMPFinalClause(const OMPFinalClause *C) {
277   if (C->getCondition())
278     Profiler->VisitStmt(C->getCondition());
279 }
280 
281 void OMPClauseProfiler::VisitOMPNumThreadsClause(const OMPNumThreadsClause *C) {
282   if (C->getNumThreads())
283     Profiler->VisitStmt(C->getNumThreads());
284 }
285 
286 void OMPClauseProfiler::VisitOMPSafelenClause(const OMPSafelenClause *C) {
287   if (C->getSafelen())
288     Profiler->VisitStmt(C->getSafelen());
289 }
290 
291 void OMPClauseProfiler::VisitOMPCollapseClause(const OMPCollapseClause *C) {
292   if (C->getNumForLoops())
293     Profiler->VisitStmt(C->getNumForLoops());
294 }
295 
296 void OMPClauseProfiler::VisitOMPDefaultClause(const OMPDefaultClause *C) { }
297 
298 void OMPClauseProfiler::VisitOMPProcBindClause(const OMPProcBindClause *C) { }
299 
300 void OMPClauseProfiler::VisitOMPScheduleClause(const OMPScheduleClause *C) {
301   if (C->getChunkSize())
302     Profiler->VisitStmt(C->getChunkSize());
303 }
304 
305 void OMPClauseProfiler::VisitOMPOrderedClause(const OMPOrderedClause *) {}
306 
307 void OMPClauseProfiler::VisitOMPNowaitClause(const OMPNowaitClause *) {}
308 
309 void OMPClauseProfiler::VisitOMPUntiedClause(const OMPUntiedClause *) {}
310 
311 void OMPClauseProfiler::VisitOMPMergeableClause(const OMPMergeableClause *) {}
312 
313 template<typename T>
314 void OMPClauseProfiler::VisitOMPClauseList(T *Node) {
315   for (auto *I : Node->varlists())
316     Profiler->VisitStmt(I);
317 }
318 
319 void OMPClauseProfiler::VisitOMPPrivateClause(const OMPPrivateClause *C) {
320   VisitOMPClauseList(C);
321 }
322 void OMPClauseProfiler::VisitOMPFirstprivateClause(
323                                          const OMPFirstprivateClause *C) {
324   VisitOMPClauseList(C);
325 }
326 void
327 OMPClauseProfiler::VisitOMPLastprivateClause(const OMPLastprivateClause *C) {
328   VisitOMPClauseList(C);
329 }
330 void OMPClauseProfiler::VisitOMPSharedClause(const OMPSharedClause *C) {
331   VisitOMPClauseList(C);
332 }
333 void OMPClauseProfiler::VisitOMPReductionClause(
334                                          const OMPReductionClause *C) {
335   Profiler->VisitNestedNameSpecifier(
336       C->getQualifierLoc().getNestedNameSpecifier());
337   Profiler->VisitName(C->getNameInfo().getName());
338   VisitOMPClauseList(C);
339 }
340 void OMPClauseProfiler::VisitOMPLinearClause(const OMPLinearClause *C) {
341   VisitOMPClauseList(C);
342   Profiler->VisitStmt(C->getStep());
343 }
344 void OMPClauseProfiler::VisitOMPAlignedClause(const OMPAlignedClause *C) {
345   VisitOMPClauseList(C);
346   Profiler->VisitStmt(C->getAlignment());
347 }
348 void OMPClauseProfiler::VisitOMPCopyinClause(const OMPCopyinClause *C) {
349   VisitOMPClauseList(C);
350 }
351 void
352 OMPClauseProfiler::VisitOMPCopyprivateClause(const OMPCopyprivateClause *C) {
353   VisitOMPClauseList(C);
354 }
355 void OMPClauseProfiler::VisitOMPFlushClause(const OMPFlushClause *C) {
356   VisitOMPClauseList(C);
357 }
358 }
359 
360 void
361 StmtProfiler::VisitOMPExecutableDirective(const OMPExecutableDirective *S) {
362   VisitStmt(S);
363   OMPClauseProfiler P(this);
364   ArrayRef<OMPClause *> Clauses = S->clauses();
365   for (ArrayRef<OMPClause *>::iterator I = Clauses.begin(), E = Clauses.end();
366        I != E; ++I)
367     if (*I)
368       P.Visit(*I);
369 }
370 
371 void StmtProfiler::VisitOMPParallelDirective(const OMPParallelDirective *S) {
372   VisitOMPExecutableDirective(S);
373 }
374 
375 void StmtProfiler::VisitOMPSimdDirective(const OMPSimdDirective *S) {
376   VisitOMPExecutableDirective(S);
377 }
378 
379 void StmtProfiler::VisitOMPForDirective(const OMPForDirective *S) {
380   VisitOMPExecutableDirective(S);
381 }
382 
383 void StmtProfiler::VisitOMPSectionsDirective(const OMPSectionsDirective *S) {
384   VisitOMPExecutableDirective(S);
385 }
386 
387 void StmtProfiler::VisitOMPSectionDirective(const OMPSectionDirective *S) {
388   VisitOMPExecutableDirective(S);
389 }
390 
391 void StmtProfiler::VisitOMPSingleDirective(const OMPSingleDirective *S) {
392   VisitOMPExecutableDirective(S);
393 }
394 
395 void StmtProfiler::VisitOMPMasterDirective(const OMPMasterDirective *S) {
396   VisitOMPExecutableDirective(S);
397 }
398 
399 void StmtProfiler::VisitOMPCriticalDirective(const OMPCriticalDirective *S) {
400   VisitOMPExecutableDirective(S);
401   VisitName(S->getDirectiveName().getName());
402 }
403 
404 void
405 StmtProfiler::VisitOMPParallelForDirective(const OMPParallelForDirective *S) {
406   VisitOMPExecutableDirective(S);
407 }
408 
409 void StmtProfiler::VisitOMPParallelSectionsDirective(
410     const OMPParallelSectionsDirective *S) {
411   VisitOMPExecutableDirective(S);
412 }
413 
414 void StmtProfiler::VisitOMPTaskDirective(const OMPTaskDirective *S) {
415   VisitOMPExecutableDirective(S);
416 }
417 
418 void StmtProfiler::VisitOMPTaskyieldDirective(const OMPTaskyieldDirective *S) {
419   VisitOMPExecutableDirective(S);
420 }
421 
422 void StmtProfiler::VisitOMPBarrierDirective(const OMPBarrierDirective *S) {
423   VisitOMPExecutableDirective(S);
424 }
425 
426 void StmtProfiler::VisitOMPTaskwaitDirective(const OMPTaskwaitDirective *S) {
427   VisitOMPExecutableDirective(S);
428 }
429 
430 void StmtProfiler::VisitOMPFlushDirective(const OMPFlushDirective *S) {
431   VisitOMPExecutableDirective(S);
432 }
433 
434 void StmtProfiler::VisitExpr(const Expr *S) {
435   VisitStmt(S);
436 }
437 
438 void StmtProfiler::VisitDeclRefExpr(const DeclRefExpr *S) {
439   VisitExpr(S);
440   if (!Canonical)
441     VisitNestedNameSpecifier(S->getQualifier());
442   VisitDecl(S->getDecl());
443   if (!Canonical)
444     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
445 }
446 
447 void StmtProfiler::VisitPredefinedExpr(const PredefinedExpr *S) {
448   VisitExpr(S);
449   ID.AddInteger(S->getIdentType());
450 }
451 
452 void StmtProfiler::VisitIntegerLiteral(const IntegerLiteral *S) {
453   VisitExpr(S);
454   S->getValue().Profile(ID);
455 }
456 
457 void StmtProfiler::VisitCharacterLiteral(const CharacterLiteral *S) {
458   VisitExpr(S);
459   ID.AddInteger(S->getKind());
460   ID.AddInteger(S->getValue());
461 }
462 
463 void StmtProfiler::VisitFloatingLiteral(const FloatingLiteral *S) {
464   VisitExpr(S);
465   S->getValue().Profile(ID);
466   ID.AddBoolean(S->isExact());
467 }
468 
469 void StmtProfiler::VisitImaginaryLiteral(const ImaginaryLiteral *S) {
470   VisitExpr(S);
471 }
472 
473 void StmtProfiler::VisitStringLiteral(const StringLiteral *S) {
474   VisitExpr(S);
475   ID.AddString(S->getBytes());
476   ID.AddInteger(S->getKind());
477 }
478 
479 void StmtProfiler::VisitParenExpr(const ParenExpr *S) {
480   VisitExpr(S);
481 }
482 
483 void StmtProfiler::VisitParenListExpr(const ParenListExpr *S) {
484   VisitExpr(S);
485 }
486 
487 void StmtProfiler::VisitUnaryOperator(const UnaryOperator *S) {
488   VisitExpr(S);
489   ID.AddInteger(S->getOpcode());
490 }
491 
492 void StmtProfiler::VisitOffsetOfExpr(const OffsetOfExpr *S) {
493   VisitType(S->getTypeSourceInfo()->getType());
494   unsigned n = S->getNumComponents();
495   for (unsigned i = 0; i < n; ++i) {
496     const OffsetOfExpr::OffsetOfNode& ON = S->getComponent(i);
497     ID.AddInteger(ON.getKind());
498     switch (ON.getKind()) {
499     case OffsetOfExpr::OffsetOfNode::Array:
500       // Expressions handled below.
501       break;
502 
503     case OffsetOfExpr::OffsetOfNode::Field:
504       VisitDecl(ON.getField());
505       break;
506 
507     case OffsetOfExpr::OffsetOfNode::Identifier:
508       ID.AddPointer(ON.getFieldName());
509       break;
510 
511     case OffsetOfExpr::OffsetOfNode::Base:
512       // These nodes are implicit, and therefore don't need profiling.
513       break;
514     }
515   }
516 
517   VisitExpr(S);
518 }
519 
520 void
521 StmtProfiler::VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *S) {
522   VisitExpr(S);
523   ID.AddInteger(S->getKind());
524   if (S->isArgumentType())
525     VisitType(S->getArgumentType());
526 }
527 
528 void StmtProfiler::VisitArraySubscriptExpr(const ArraySubscriptExpr *S) {
529   VisitExpr(S);
530 }
531 
532 void StmtProfiler::VisitCallExpr(const CallExpr *S) {
533   VisitExpr(S);
534 }
535 
536 void StmtProfiler::VisitMemberExpr(const MemberExpr *S) {
537   VisitExpr(S);
538   VisitDecl(S->getMemberDecl());
539   if (!Canonical)
540     VisitNestedNameSpecifier(S->getQualifier());
541   ID.AddBoolean(S->isArrow());
542 }
543 
544 void StmtProfiler::VisitCompoundLiteralExpr(const CompoundLiteralExpr *S) {
545   VisitExpr(S);
546   ID.AddBoolean(S->isFileScope());
547 }
548 
549 void StmtProfiler::VisitCastExpr(const CastExpr *S) {
550   VisitExpr(S);
551 }
552 
553 void StmtProfiler::VisitImplicitCastExpr(const ImplicitCastExpr *S) {
554   VisitCastExpr(S);
555   ID.AddInteger(S->getValueKind());
556 }
557 
558 void StmtProfiler::VisitExplicitCastExpr(const ExplicitCastExpr *S) {
559   VisitCastExpr(S);
560   VisitType(S->getTypeAsWritten());
561 }
562 
563 void StmtProfiler::VisitCStyleCastExpr(const CStyleCastExpr *S) {
564   VisitExplicitCastExpr(S);
565 }
566 
567 void StmtProfiler::VisitBinaryOperator(const BinaryOperator *S) {
568   VisitExpr(S);
569   ID.AddInteger(S->getOpcode());
570 }
571 
572 void
573 StmtProfiler::VisitCompoundAssignOperator(const CompoundAssignOperator *S) {
574   VisitBinaryOperator(S);
575 }
576 
577 void StmtProfiler::VisitConditionalOperator(const ConditionalOperator *S) {
578   VisitExpr(S);
579 }
580 
581 void StmtProfiler::VisitBinaryConditionalOperator(
582     const BinaryConditionalOperator *S) {
583   VisitExpr(S);
584 }
585 
586 void StmtProfiler::VisitAddrLabelExpr(const AddrLabelExpr *S) {
587   VisitExpr(S);
588   VisitDecl(S->getLabel());
589 }
590 
591 void StmtProfiler::VisitStmtExpr(const StmtExpr *S) {
592   VisitExpr(S);
593 }
594 
595 void StmtProfiler::VisitShuffleVectorExpr(const ShuffleVectorExpr *S) {
596   VisitExpr(S);
597 }
598 
599 void StmtProfiler::VisitConvertVectorExpr(const ConvertVectorExpr *S) {
600   VisitExpr(S);
601 }
602 
603 void StmtProfiler::VisitChooseExpr(const ChooseExpr *S) {
604   VisitExpr(S);
605 }
606 
607 void StmtProfiler::VisitGNUNullExpr(const GNUNullExpr *S) {
608   VisitExpr(S);
609 }
610 
611 void StmtProfiler::VisitVAArgExpr(const VAArgExpr *S) {
612   VisitExpr(S);
613 }
614 
615 void StmtProfiler::VisitInitListExpr(const InitListExpr *S) {
616   if (S->getSyntacticForm()) {
617     VisitInitListExpr(S->getSyntacticForm());
618     return;
619   }
620 
621   VisitExpr(S);
622 }
623 
624 void StmtProfiler::VisitDesignatedInitExpr(const DesignatedInitExpr *S) {
625   VisitExpr(S);
626   ID.AddBoolean(S->usesGNUSyntax());
627   for (DesignatedInitExpr::const_designators_iterator D =
628          S->designators_begin(), DEnd = S->designators_end();
629        D != DEnd; ++D) {
630     if (D->isFieldDesignator()) {
631       ID.AddInteger(0);
632       VisitName(D->getFieldName());
633       continue;
634     }
635 
636     if (D->isArrayDesignator()) {
637       ID.AddInteger(1);
638     } else {
639       assert(D->isArrayRangeDesignator());
640       ID.AddInteger(2);
641     }
642     ID.AddInteger(D->getFirstExprIndex());
643   }
644 }
645 
646 void StmtProfiler::VisitImplicitValueInitExpr(const ImplicitValueInitExpr *S) {
647   VisitExpr(S);
648 }
649 
650 void StmtProfiler::VisitExtVectorElementExpr(const ExtVectorElementExpr *S) {
651   VisitExpr(S);
652   VisitName(&S->getAccessor());
653 }
654 
655 void StmtProfiler::VisitBlockExpr(const BlockExpr *S) {
656   VisitExpr(S);
657   VisitDecl(S->getBlockDecl());
658 }
659 
660 void StmtProfiler::VisitGenericSelectionExpr(const GenericSelectionExpr *S) {
661   VisitExpr(S);
662   for (unsigned i = 0; i != S->getNumAssocs(); ++i) {
663     QualType T = S->getAssocType(i);
664     if (T.isNull())
665       ID.AddPointer(nullptr);
666     else
667       VisitType(T);
668     VisitExpr(S->getAssocExpr(i));
669   }
670 }
671 
672 void StmtProfiler::VisitPseudoObjectExpr(const PseudoObjectExpr *S) {
673   VisitExpr(S);
674   for (PseudoObjectExpr::const_semantics_iterator
675          i = S->semantics_begin(), e = S->semantics_end(); i != e; ++i)
676     // Normally, we would not profile the source expressions of OVEs.
677     if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(*i))
678       Visit(OVE->getSourceExpr());
679 }
680 
681 void StmtProfiler::VisitAtomicExpr(const AtomicExpr *S) {
682   VisitExpr(S);
683   ID.AddInteger(S->getOp());
684 }
685 
686 static Stmt::StmtClass DecodeOperatorCall(const CXXOperatorCallExpr *S,
687                                           UnaryOperatorKind &UnaryOp,
688                                           BinaryOperatorKind &BinaryOp) {
689   switch (S->getOperator()) {
690   case OO_None:
691   case OO_New:
692   case OO_Delete:
693   case OO_Array_New:
694   case OO_Array_Delete:
695   case OO_Arrow:
696   case OO_Call:
697   case OO_Conditional:
698   case NUM_OVERLOADED_OPERATORS:
699     llvm_unreachable("Invalid operator call kind");
700 
701   case OO_Plus:
702     if (S->getNumArgs() == 1) {
703       UnaryOp = UO_Plus;
704       return Stmt::UnaryOperatorClass;
705     }
706 
707     BinaryOp = BO_Add;
708     return Stmt::BinaryOperatorClass;
709 
710   case OO_Minus:
711     if (S->getNumArgs() == 1) {
712       UnaryOp = UO_Minus;
713       return Stmt::UnaryOperatorClass;
714     }
715 
716     BinaryOp = BO_Sub;
717     return Stmt::BinaryOperatorClass;
718 
719   case OO_Star:
720     if (S->getNumArgs() == 1) {
721       UnaryOp = UO_Deref;
722       return Stmt::UnaryOperatorClass;
723     }
724 
725     BinaryOp = BO_Mul;
726     return Stmt::BinaryOperatorClass;
727 
728   case OO_Slash:
729     BinaryOp = BO_Div;
730     return Stmt::BinaryOperatorClass;
731 
732   case OO_Percent:
733     BinaryOp = BO_Rem;
734     return Stmt::BinaryOperatorClass;
735 
736   case OO_Caret:
737     BinaryOp = BO_Xor;
738     return Stmt::BinaryOperatorClass;
739 
740   case OO_Amp:
741     if (S->getNumArgs() == 1) {
742       UnaryOp = UO_AddrOf;
743       return Stmt::UnaryOperatorClass;
744     }
745 
746     BinaryOp = BO_And;
747     return Stmt::BinaryOperatorClass;
748 
749   case OO_Pipe:
750     BinaryOp = BO_Or;
751     return Stmt::BinaryOperatorClass;
752 
753   case OO_Tilde:
754     UnaryOp = UO_Not;
755     return Stmt::UnaryOperatorClass;
756 
757   case OO_Exclaim:
758     UnaryOp = UO_LNot;
759     return Stmt::UnaryOperatorClass;
760 
761   case OO_Equal:
762     BinaryOp = BO_Assign;
763     return Stmt::BinaryOperatorClass;
764 
765   case OO_Less:
766     BinaryOp = BO_LT;
767     return Stmt::BinaryOperatorClass;
768 
769   case OO_Greater:
770     BinaryOp = BO_GT;
771     return Stmt::BinaryOperatorClass;
772 
773   case OO_PlusEqual:
774     BinaryOp = BO_AddAssign;
775     return Stmt::CompoundAssignOperatorClass;
776 
777   case OO_MinusEqual:
778     BinaryOp = BO_SubAssign;
779     return Stmt::CompoundAssignOperatorClass;
780 
781   case OO_StarEqual:
782     BinaryOp = BO_MulAssign;
783     return Stmt::CompoundAssignOperatorClass;
784 
785   case OO_SlashEqual:
786     BinaryOp = BO_DivAssign;
787     return Stmt::CompoundAssignOperatorClass;
788 
789   case OO_PercentEqual:
790     BinaryOp = BO_RemAssign;
791     return Stmt::CompoundAssignOperatorClass;
792 
793   case OO_CaretEqual:
794     BinaryOp = BO_XorAssign;
795     return Stmt::CompoundAssignOperatorClass;
796 
797   case OO_AmpEqual:
798     BinaryOp = BO_AndAssign;
799     return Stmt::CompoundAssignOperatorClass;
800 
801   case OO_PipeEqual:
802     BinaryOp = BO_OrAssign;
803     return Stmt::CompoundAssignOperatorClass;
804 
805   case OO_LessLess:
806     BinaryOp = BO_Shl;
807     return Stmt::BinaryOperatorClass;
808 
809   case OO_GreaterGreater:
810     BinaryOp = BO_Shr;
811     return Stmt::BinaryOperatorClass;
812 
813   case OO_LessLessEqual:
814     BinaryOp = BO_ShlAssign;
815     return Stmt::CompoundAssignOperatorClass;
816 
817   case OO_GreaterGreaterEqual:
818     BinaryOp = BO_ShrAssign;
819     return Stmt::CompoundAssignOperatorClass;
820 
821   case OO_EqualEqual:
822     BinaryOp = BO_EQ;
823     return Stmt::BinaryOperatorClass;
824 
825   case OO_ExclaimEqual:
826     BinaryOp = BO_NE;
827     return Stmt::BinaryOperatorClass;
828 
829   case OO_LessEqual:
830     BinaryOp = BO_LE;
831     return Stmt::BinaryOperatorClass;
832 
833   case OO_GreaterEqual:
834     BinaryOp = BO_GE;
835     return Stmt::BinaryOperatorClass;
836 
837   case OO_AmpAmp:
838     BinaryOp = BO_LAnd;
839     return Stmt::BinaryOperatorClass;
840 
841   case OO_PipePipe:
842     BinaryOp = BO_LOr;
843     return Stmt::BinaryOperatorClass;
844 
845   case OO_PlusPlus:
846     UnaryOp = S->getNumArgs() == 1? UO_PreInc
847                                   : UO_PostInc;
848     return Stmt::UnaryOperatorClass;
849 
850   case OO_MinusMinus:
851     UnaryOp = S->getNumArgs() == 1? UO_PreDec
852                                   : UO_PostDec;
853     return Stmt::UnaryOperatorClass;
854 
855   case OO_Comma:
856     BinaryOp = BO_Comma;
857     return Stmt::BinaryOperatorClass;
858 
859 
860   case OO_ArrowStar:
861     BinaryOp = BO_PtrMemI;
862     return Stmt::BinaryOperatorClass;
863 
864   case OO_Subscript:
865     return Stmt::ArraySubscriptExprClass;
866   }
867 
868   llvm_unreachable("Invalid overloaded operator expression");
869 }
870 
871 
872 void StmtProfiler::VisitCXXOperatorCallExpr(const CXXOperatorCallExpr *S) {
873   if (S->isTypeDependent()) {
874     // Type-dependent operator calls are profiled like their underlying
875     // syntactic operator.
876     UnaryOperatorKind UnaryOp = UO_Extension;
877     BinaryOperatorKind BinaryOp = BO_Comma;
878     Stmt::StmtClass SC = DecodeOperatorCall(S, UnaryOp, BinaryOp);
879 
880     ID.AddInteger(SC);
881     for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
882       Visit(S->getArg(I));
883     if (SC == Stmt::UnaryOperatorClass)
884       ID.AddInteger(UnaryOp);
885     else if (SC == Stmt::BinaryOperatorClass ||
886              SC == Stmt::CompoundAssignOperatorClass)
887       ID.AddInteger(BinaryOp);
888     else
889       assert(SC == Stmt::ArraySubscriptExprClass);
890 
891     return;
892   }
893 
894   VisitCallExpr(S);
895   ID.AddInteger(S->getOperator());
896 }
897 
898 void StmtProfiler::VisitCXXMemberCallExpr(const CXXMemberCallExpr *S) {
899   VisitCallExpr(S);
900 }
901 
902 void StmtProfiler::VisitCUDAKernelCallExpr(const CUDAKernelCallExpr *S) {
903   VisitCallExpr(S);
904 }
905 
906 void StmtProfiler::VisitAsTypeExpr(const AsTypeExpr *S) {
907   VisitExpr(S);
908 }
909 
910 void StmtProfiler::VisitCXXNamedCastExpr(const CXXNamedCastExpr *S) {
911   VisitExplicitCastExpr(S);
912 }
913 
914 void StmtProfiler::VisitCXXStaticCastExpr(const CXXStaticCastExpr *S) {
915   VisitCXXNamedCastExpr(S);
916 }
917 
918 void StmtProfiler::VisitCXXDynamicCastExpr(const CXXDynamicCastExpr *S) {
919   VisitCXXNamedCastExpr(S);
920 }
921 
922 void
923 StmtProfiler::VisitCXXReinterpretCastExpr(const CXXReinterpretCastExpr *S) {
924   VisitCXXNamedCastExpr(S);
925 }
926 
927 void StmtProfiler::VisitCXXConstCastExpr(const CXXConstCastExpr *S) {
928   VisitCXXNamedCastExpr(S);
929 }
930 
931 void StmtProfiler::VisitUserDefinedLiteral(const UserDefinedLiteral *S) {
932   VisitCallExpr(S);
933 }
934 
935 void StmtProfiler::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *S) {
936   VisitExpr(S);
937   ID.AddBoolean(S->getValue());
938 }
939 
940 void StmtProfiler::VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *S) {
941   VisitExpr(S);
942 }
943 
944 void StmtProfiler::VisitCXXStdInitializerListExpr(
945     const CXXStdInitializerListExpr *S) {
946   VisitExpr(S);
947 }
948 
949 void StmtProfiler::VisitCXXTypeidExpr(const CXXTypeidExpr *S) {
950   VisitExpr(S);
951   if (S->isTypeOperand())
952     VisitType(S->getTypeOperandSourceInfo()->getType());
953 }
954 
955 void StmtProfiler::VisitCXXUuidofExpr(const CXXUuidofExpr *S) {
956   VisitExpr(S);
957   if (S->isTypeOperand())
958     VisitType(S->getTypeOperandSourceInfo()->getType());
959 }
960 
961 void StmtProfiler::VisitMSPropertyRefExpr(const MSPropertyRefExpr *S) {
962   VisitExpr(S);
963   VisitDecl(S->getPropertyDecl());
964 }
965 
966 void StmtProfiler::VisitCXXThisExpr(const CXXThisExpr *S) {
967   VisitExpr(S);
968   ID.AddBoolean(S->isImplicit());
969 }
970 
971 void StmtProfiler::VisitCXXThrowExpr(const CXXThrowExpr *S) {
972   VisitExpr(S);
973 }
974 
975 void StmtProfiler::VisitCXXDefaultArgExpr(const CXXDefaultArgExpr *S) {
976   VisitExpr(S);
977   VisitDecl(S->getParam());
978 }
979 
980 void StmtProfiler::VisitCXXDefaultInitExpr(const CXXDefaultInitExpr *S) {
981   VisitExpr(S);
982   VisitDecl(S->getField());
983 }
984 
985 void StmtProfiler::VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *S) {
986   VisitExpr(S);
987   VisitDecl(
988          const_cast<CXXDestructorDecl *>(S->getTemporary()->getDestructor()));
989 }
990 
991 void StmtProfiler::VisitCXXConstructExpr(const CXXConstructExpr *S) {
992   VisitExpr(S);
993   VisitDecl(S->getConstructor());
994   ID.AddBoolean(S->isElidable());
995 }
996 
997 void StmtProfiler::VisitCXXFunctionalCastExpr(const CXXFunctionalCastExpr *S) {
998   VisitExplicitCastExpr(S);
999 }
1000 
1001 void
1002 StmtProfiler::VisitCXXTemporaryObjectExpr(const CXXTemporaryObjectExpr *S) {
1003   VisitCXXConstructExpr(S);
1004 }
1005 
1006 void
1007 StmtProfiler::VisitLambdaExpr(const LambdaExpr *S) {
1008   VisitExpr(S);
1009   for (LambdaExpr::capture_iterator C = S->explicit_capture_begin(),
1010                                  CEnd = S->explicit_capture_end();
1011        C != CEnd; ++C) {
1012     ID.AddInteger(C->getCaptureKind());
1013     switch (C->getCaptureKind()) {
1014     case LCK_This:
1015       break;
1016     case LCK_ByRef:
1017     case LCK_ByCopy:
1018       VisitDecl(C->getCapturedVar());
1019       ID.AddBoolean(C->isPackExpansion());
1020       break;
1021     }
1022   }
1023   // Note: If we actually needed to be able to match lambda
1024   // expressions, we would have to consider parameters and return type
1025   // here, among other things.
1026   VisitStmt(S->getBody());
1027 }
1028 
1029 void
1030 StmtProfiler::VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *S) {
1031   VisitExpr(S);
1032 }
1033 
1034 void StmtProfiler::VisitCXXDeleteExpr(const CXXDeleteExpr *S) {
1035   VisitExpr(S);
1036   ID.AddBoolean(S->isGlobalDelete());
1037   ID.AddBoolean(S->isArrayForm());
1038   VisitDecl(S->getOperatorDelete());
1039 }
1040 
1041 
1042 void StmtProfiler::VisitCXXNewExpr(const CXXNewExpr *S) {
1043   VisitExpr(S);
1044   VisitType(S->getAllocatedType());
1045   VisitDecl(S->getOperatorNew());
1046   VisitDecl(S->getOperatorDelete());
1047   ID.AddBoolean(S->isArray());
1048   ID.AddInteger(S->getNumPlacementArgs());
1049   ID.AddBoolean(S->isGlobalNew());
1050   ID.AddBoolean(S->isParenTypeId());
1051   ID.AddInteger(S->getInitializationStyle());
1052 }
1053 
1054 void
1055 StmtProfiler::VisitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *S) {
1056   VisitExpr(S);
1057   ID.AddBoolean(S->isArrow());
1058   VisitNestedNameSpecifier(S->getQualifier());
1059   ID.AddBoolean(S->getScopeTypeInfo() != nullptr);
1060   if (S->getScopeTypeInfo())
1061     VisitType(S->getScopeTypeInfo()->getType());
1062   ID.AddBoolean(S->getDestroyedTypeInfo() != nullptr);
1063   if (S->getDestroyedTypeInfo())
1064     VisitType(S->getDestroyedType());
1065   else
1066     ID.AddPointer(S->getDestroyedTypeIdentifier());
1067 }
1068 
1069 void StmtProfiler::VisitOverloadExpr(const OverloadExpr *S) {
1070   VisitExpr(S);
1071   VisitNestedNameSpecifier(S->getQualifier());
1072   VisitName(S->getName());
1073   ID.AddBoolean(S->hasExplicitTemplateArgs());
1074   if (S->hasExplicitTemplateArgs())
1075     VisitTemplateArguments(S->getExplicitTemplateArgs().getTemplateArgs(),
1076                            S->getExplicitTemplateArgs().NumTemplateArgs);
1077 }
1078 
1079 void
1080 StmtProfiler::VisitUnresolvedLookupExpr(const UnresolvedLookupExpr *S) {
1081   VisitOverloadExpr(S);
1082 }
1083 
1084 void StmtProfiler::VisitTypeTraitExpr(const TypeTraitExpr *S) {
1085   VisitExpr(S);
1086   ID.AddInteger(S->getTrait());
1087   ID.AddInteger(S->getNumArgs());
1088   for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
1089     VisitType(S->getArg(I)->getType());
1090 }
1091 
1092 void StmtProfiler::VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *S) {
1093   VisitExpr(S);
1094   ID.AddInteger(S->getTrait());
1095   VisitType(S->getQueriedType());
1096 }
1097 
1098 void StmtProfiler::VisitExpressionTraitExpr(const ExpressionTraitExpr *S) {
1099   VisitExpr(S);
1100   ID.AddInteger(S->getTrait());
1101   VisitExpr(S->getQueriedExpression());
1102 }
1103 
1104 void StmtProfiler::VisitDependentScopeDeclRefExpr(
1105     const DependentScopeDeclRefExpr *S) {
1106   VisitExpr(S);
1107   VisitName(S->getDeclName());
1108   VisitNestedNameSpecifier(S->getQualifier());
1109   ID.AddBoolean(S->hasExplicitTemplateArgs());
1110   if (S->hasExplicitTemplateArgs())
1111     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1112 }
1113 
1114 void StmtProfiler::VisitExprWithCleanups(const ExprWithCleanups *S) {
1115   VisitExpr(S);
1116 }
1117 
1118 void StmtProfiler::VisitCXXUnresolvedConstructExpr(
1119     const CXXUnresolvedConstructExpr *S) {
1120   VisitExpr(S);
1121   VisitType(S->getTypeAsWritten());
1122 }
1123 
1124 void StmtProfiler::VisitCXXDependentScopeMemberExpr(
1125     const CXXDependentScopeMemberExpr *S) {
1126   ID.AddBoolean(S->isImplicitAccess());
1127   if (!S->isImplicitAccess()) {
1128     VisitExpr(S);
1129     ID.AddBoolean(S->isArrow());
1130   }
1131   VisitNestedNameSpecifier(S->getQualifier());
1132   VisitName(S->getMember());
1133   ID.AddBoolean(S->hasExplicitTemplateArgs());
1134   if (S->hasExplicitTemplateArgs())
1135     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1136 }
1137 
1138 void StmtProfiler::VisitUnresolvedMemberExpr(const UnresolvedMemberExpr *S) {
1139   ID.AddBoolean(S->isImplicitAccess());
1140   if (!S->isImplicitAccess()) {
1141     VisitExpr(S);
1142     ID.AddBoolean(S->isArrow());
1143   }
1144   VisitNestedNameSpecifier(S->getQualifier());
1145   VisitName(S->getMemberName());
1146   ID.AddBoolean(S->hasExplicitTemplateArgs());
1147   if (S->hasExplicitTemplateArgs())
1148     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1149 }
1150 
1151 void StmtProfiler::VisitCXXNoexceptExpr(const CXXNoexceptExpr *S) {
1152   VisitExpr(S);
1153 }
1154 
1155 void StmtProfiler::VisitPackExpansionExpr(const PackExpansionExpr *S) {
1156   VisitExpr(S);
1157 }
1158 
1159 void StmtProfiler::VisitSizeOfPackExpr(const SizeOfPackExpr *S) {
1160   VisitExpr(S);
1161   VisitDecl(S->getPack());
1162 }
1163 
1164 void StmtProfiler::VisitSubstNonTypeTemplateParmPackExpr(
1165     const SubstNonTypeTemplateParmPackExpr *S) {
1166   VisitExpr(S);
1167   VisitDecl(S->getParameterPack());
1168   VisitTemplateArgument(S->getArgumentPack());
1169 }
1170 
1171 void StmtProfiler::VisitSubstNonTypeTemplateParmExpr(
1172     const SubstNonTypeTemplateParmExpr *E) {
1173   // Profile exactly as the replacement expression.
1174   Visit(E->getReplacement());
1175 }
1176 
1177 void StmtProfiler::VisitFunctionParmPackExpr(const FunctionParmPackExpr *S) {
1178   VisitExpr(S);
1179   VisitDecl(S->getParameterPack());
1180   ID.AddInteger(S->getNumExpansions());
1181   for (FunctionParmPackExpr::iterator I = S->begin(), E = S->end(); I != E; ++I)
1182     VisitDecl(*I);
1183 }
1184 
1185 void StmtProfiler::VisitMaterializeTemporaryExpr(
1186                                            const MaterializeTemporaryExpr *S) {
1187   VisitExpr(S);
1188 }
1189 
1190 void StmtProfiler::VisitOpaqueValueExpr(const OpaqueValueExpr *E) {
1191   VisitExpr(E);
1192 }
1193 
1194 void StmtProfiler::VisitObjCStringLiteral(const ObjCStringLiteral *S) {
1195   VisitExpr(S);
1196 }
1197 
1198 void StmtProfiler::VisitObjCBoxedExpr(const ObjCBoxedExpr *E) {
1199   VisitExpr(E);
1200 }
1201 
1202 void StmtProfiler::VisitObjCArrayLiteral(const ObjCArrayLiteral *E) {
1203   VisitExpr(E);
1204 }
1205 
1206 void StmtProfiler::VisitObjCDictionaryLiteral(const ObjCDictionaryLiteral *E) {
1207   VisitExpr(E);
1208 }
1209 
1210 void StmtProfiler::VisitObjCEncodeExpr(const ObjCEncodeExpr *S) {
1211   VisitExpr(S);
1212   VisitType(S->getEncodedType());
1213 }
1214 
1215 void StmtProfiler::VisitObjCSelectorExpr(const ObjCSelectorExpr *S) {
1216   VisitExpr(S);
1217   VisitName(S->getSelector());
1218 }
1219 
1220 void StmtProfiler::VisitObjCProtocolExpr(const ObjCProtocolExpr *S) {
1221   VisitExpr(S);
1222   VisitDecl(S->getProtocol());
1223 }
1224 
1225 void StmtProfiler::VisitObjCIvarRefExpr(const ObjCIvarRefExpr *S) {
1226   VisitExpr(S);
1227   VisitDecl(S->getDecl());
1228   ID.AddBoolean(S->isArrow());
1229   ID.AddBoolean(S->isFreeIvar());
1230 }
1231 
1232 void StmtProfiler::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *S) {
1233   VisitExpr(S);
1234   if (S->isImplicitProperty()) {
1235     VisitDecl(S->getImplicitPropertyGetter());
1236     VisitDecl(S->getImplicitPropertySetter());
1237   } else {
1238     VisitDecl(S->getExplicitProperty());
1239   }
1240   if (S->isSuperReceiver()) {
1241     ID.AddBoolean(S->isSuperReceiver());
1242     VisitType(S->getSuperReceiverType());
1243   }
1244 }
1245 
1246 void StmtProfiler::VisitObjCSubscriptRefExpr(const ObjCSubscriptRefExpr *S) {
1247   VisitExpr(S);
1248   VisitDecl(S->getAtIndexMethodDecl());
1249   VisitDecl(S->setAtIndexMethodDecl());
1250 }
1251 
1252 void StmtProfiler::VisitObjCMessageExpr(const ObjCMessageExpr *S) {
1253   VisitExpr(S);
1254   VisitName(S->getSelector());
1255   VisitDecl(S->getMethodDecl());
1256 }
1257 
1258 void StmtProfiler::VisitObjCIsaExpr(const ObjCIsaExpr *S) {
1259   VisitExpr(S);
1260   ID.AddBoolean(S->isArrow());
1261 }
1262 
1263 void StmtProfiler::VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *S) {
1264   VisitExpr(S);
1265   ID.AddBoolean(S->getValue());
1266 }
1267 
1268 void StmtProfiler::VisitObjCIndirectCopyRestoreExpr(
1269     const ObjCIndirectCopyRestoreExpr *S) {
1270   VisitExpr(S);
1271   ID.AddBoolean(S->shouldCopy());
1272 }
1273 
1274 void StmtProfiler::VisitObjCBridgedCastExpr(const ObjCBridgedCastExpr *S) {
1275   VisitExplicitCastExpr(S);
1276   ID.AddBoolean(S->getBridgeKind());
1277 }
1278 
1279 void StmtProfiler::VisitDecl(const Decl *D) {
1280   ID.AddInteger(D? D->getKind() : 0);
1281 
1282   if (Canonical && D) {
1283     if (const NonTypeTemplateParmDecl *NTTP =
1284           dyn_cast<NonTypeTemplateParmDecl>(D)) {
1285       ID.AddInteger(NTTP->getDepth());
1286       ID.AddInteger(NTTP->getIndex());
1287       ID.AddBoolean(NTTP->isParameterPack());
1288       VisitType(NTTP->getType());
1289       return;
1290     }
1291 
1292     if (const ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D)) {
1293       // The Itanium C++ ABI uses the type, scope depth, and scope
1294       // index of a parameter when mangling expressions that involve
1295       // function parameters, so we will use the parameter's type for
1296       // establishing function parameter identity. That way, our
1297       // definition of "equivalent" (per C++ [temp.over.link]) is at
1298       // least as strong as the definition of "equivalent" used for
1299       // name mangling.
1300       VisitType(Parm->getType());
1301       ID.AddInteger(Parm->getFunctionScopeDepth());
1302       ID.AddInteger(Parm->getFunctionScopeIndex());
1303       return;
1304     }
1305 
1306     if (const TemplateTypeParmDecl *TTP =
1307           dyn_cast<TemplateTypeParmDecl>(D)) {
1308       ID.AddInteger(TTP->getDepth());
1309       ID.AddInteger(TTP->getIndex());
1310       ID.AddBoolean(TTP->isParameterPack());
1311       return;
1312     }
1313 
1314     if (const TemplateTemplateParmDecl *TTP =
1315           dyn_cast<TemplateTemplateParmDecl>(D)) {
1316       ID.AddInteger(TTP->getDepth());
1317       ID.AddInteger(TTP->getIndex());
1318       ID.AddBoolean(TTP->isParameterPack());
1319       return;
1320     }
1321   }
1322 
1323   ID.AddPointer(D? D->getCanonicalDecl() : nullptr);
1324 }
1325 
1326 void StmtProfiler::VisitType(QualType T) {
1327   if (Canonical)
1328     T = Context.getCanonicalType(T);
1329 
1330   ID.AddPointer(T.getAsOpaquePtr());
1331 }
1332 
1333 void StmtProfiler::VisitName(DeclarationName Name) {
1334   ID.AddPointer(Name.getAsOpaquePtr());
1335 }
1336 
1337 void StmtProfiler::VisitNestedNameSpecifier(NestedNameSpecifier *NNS) {
1338   if (Canonical)
1339     NNS = Context.getCanonicalNestedNameSpecifier(NNS);
1340   ID.AddPointer(NNS);
1341 }
1342 
1343 void StmtProfiler::VisitTemplateName(TemplateName Name) {
1344   if (Canonical)
1345     Name = Context.getCanonicalTemplateName(Name);
1346 
1347   Name.Profile(ID);
1348 }
1349 
1350 void StmtProfiler::VisitTemplateArguments(const TemplateArgumentLoc *Args,
1351                                           unsigned NumArgs) {
1352   ID.AddInteger(NumArgs);
1353   for (unsigned I = 0; I != NumArgs; ++I)
1354     VisitTemplateArgument(Args[I].getArgument());
1355 }
1356 
1357 void StmtProfiler::VisitTemplateArgument(const TemplateArgument &Arg) {
1358   // Mostly repetitive with TemplateArgument::Profile!
1359   ID.AddInteger(Arg.getKind());
1360   switch (Arg.getKind()) {
1361   case TemplateArgument::Null:
1362     break;
1363 
1364   case TemplateArgument::Type:
1365     VisitType(Arg.getAsType());
1366     break;
1367 
1368   case TemplateArgument::Template:
1369   case TemplateArgument::TemplateExpansion:
1370     VisitTemplateName(Arg.getAsTemplateOrTemplatePattern());
1371     break;
1372 
1373   case TemplateArgument::Declaration:
1374     VisitDecl(Arg.getAsDecl());
1375     break;
1376 
1377   case TemplateArgument::NullPtr:
1378     VisitType(Arg.getNullPtrType());
1379     break;
1380 
1381   case TemplateArgument::Integral:
1382     Arg.getAsIntegral().Profile(ID);
1383     VisitType(Arg.getIntegralType());
1384     break;
1385 
1386   case TemplateArgument::Expression:
1387     Visit(Arg.getAsExpr());
1388     break;
1389 
1390   case TemplateArgument::Pack:
1391     for (const auto &P : Arg.pack_elements())
1392       VisitTemplateArgument(P);
1393     break;
1394   }
1395 }
1396 
1397 void Stmt::Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
1398                    bool Canonical) const {
1399   StmtProfiler Profiler(ID, Context, Canonical);
1400   Profiler.Visit(this);
1401 }
1402