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 void OMPClauseProfiler::VisitOMPReadClause(const OMPReadClause *) {}
314 
315 void OMPClauseProfiler::VisitOMPWriteClause(const OMPWriteClause *) {}
316 
317 void OMPClauseProfiler::VisitOMPUpdateClause(const OMPUpdateClause *) {}
318 
319 void OMPClauseProfiler::VisitOMPCaptureClause(const OMPCaptureClause *) {}
320 
321 void OMPClauseProfiler::VisitOMPSeqCstClause(const OMPSeqCstClause *) {}
322 
323 template<typename T>
324 void OMPClauseProfiler::VisitOMPClauseList(T *Node) {
325   for (auto *I : Node->varlists())
326     Profiler->VisitStmt(I);
327 }
328 
329 void OMPClauseProfiler::VisitOMPPrivateClause(const OMPPrivateClause *C) {
330   VisitOMPClauseList(C);
331 }
332 void
333 OMPClauseProfiler::VisitOMPFirstprivateClause(const OMPFirstprivateClause *C) {
334   VisitOMPClauseList(C);
335   for (auto *E : C->private_copies()) {
336     Profiler->VisitStmt(E);
337   }
338   for (auto *E : C->inits()) {
339     Profiler->VisitStmt(E);
340   }
341 }
342 void
343 OMPClauseProfiler::VisitOMPLastprivateClause(const OMPLastprivateClause *C) {
344   VisitOMPClauseList(C);
345 }
346 void OMPClauseProfiler::VisitOMPSharedClause(const OMPSharedClause *C) {
347   VisitOMPClauseList(C);
348 }
349 void OMPClauseProfiler::VisitOMPReductionClause(
350                                          const OMPReductionClause *C) {
351   Profiler->VisitNestedNameSpecifier(
352       C->getQualifierLoc().getNestedNameSpecifier());
353   Profiler->VisitName(C->getNameInfo().getName());
354   VisitOMPClauseList(C);
355 }
356 void OMPClauseProfiler::VisitOMPLinearClause(const OMPLinearClause *C) {
357   VisitOMPClauseList(C);
358   Profiler->VisitStmt(C->getStep());
359 }
360 void OMPClauseProfiler::VisitOMPAlignedClause(const OMPAlignedClause *C) {
361   VisitOMPClauseList(C);
362   Profiler->VisitStmt(C->getAlignment());
363 }
364 void OMPClauseProfiler::VisitOMPCopyinClause(const OMPCopyinClause *C) {
365   VisitOMPClauseList(C);
366 }
367 void
368 OMPClauseProfiler::VisitOMPCopyprivateClause(const OMPCopyprivateClause *C) {
369   VisitOMPClauseList(C);
370 }
371 void OMPClauseProfiler::VisitOMPFlushClause(const OMPFlushClause *C) {
372   VisitOMPClauseList(C);
373 }
374 }
375 
376 void
377 StmtProfiler::VisitOMPExecutableDirective(const OMPExecutableDirective *S) {
378   VisitStmt(S);
379   OMPClauseProfiler P(this);
380   ArrayRef<OMPClause *> Clauses = S->clauses();
381   for (ArrayRef<OMPClause *>::iterator I = Clauses.begin(), E = Clauses.end();
382        I != E; ++I)
383     if (*I)
384       P.Visit(*I);
385 }
386 
387 void StmtProfiler::VisitOMPLoopDirective(const OMPLoopDirective *S) {
388   VisitOMPExecutableDirective(S);
389 }
390 
391 void StmtProfiler::VisitOMPParallelDirective(const OMPParallelDirective *S) {
392   VisitOMPExecutableDirective(S);
393 }
394 
395 void StmtProfiler::VisitOMPSimdDirective(const OMPSimdDirective *S) {
396   VisitOMPLoopDirective(S);
397 }
398 
399 void StmtProfiler::VisitOMPForDirective(const OMPForDirective *S) {
400   VisitOMPLoopDirective(S);
401 }
402 
403 void StmtProfiler::VisitOMPForSimdDirective(const OMPForSimdDirective *S) {
404   VisitOMPLoopDirective(S);
405 }
406 
407 void StmtProfiler::VisitOMPSectionsDirective(const OMPSectionsDirective *S) {
408   VisitOMPExecutableDirective(S);
409 }
410 
411 void StmtProfiler::VisitOMPSectionDirective(const OMPSectionDirective *S) {
412   VisitOMPExecutableDirective(S);
413 }
414 
415 void StmtProfiler::VisitOMPSingleDirective(const OMPSingleDirective *S) {
416   VisitOMPExecutableDirective(S);
417 }
418 
419 void StmtProfiler::VisitOMPMasterDirective(const OMPMasterDirective *S) {
420   VisitOMPExecutableDirective(S);
421 }
422 
423 void StmtProfiler::VisitOMPCriticalDirective(const OMPCriticalDirective *S) {
424   VisitOMPExecutableDirective(S);
425   VisitName(S->getDirectiveName().getName());
426 }
427 
428 void
429 StmtProfiler::VisitOMPParallelForDirective(const OMPParallelForDirective *S) {
430   VisitOMPLoopDirective(S);
431 }
432 
433 void StmtProfiler::VisitOMPParallelForSimdDirective(
434     const OMPParallelForSimdDirective *S) {
435   VisitOMPLoopDirective(S);
436 }
437 
438 void StmtProfiler::VisitOMPParallelSectionsDirective(
439     const OMPParallelSectionsDirective *S) {
440   VisitOMPExecutableDirective(S);
441 }
442 
443 void StmtProfiler::VisitOMPTaskDirective(const OMPTaskDirective *S) {
444   VisitOMPExecutableDirective(S);
445 }
446 
447 void StmtProfiler::VisitOMPTaskyieldDirective(const OMPTaskyieldDirective *S) {
448   VisitOMPExecutableDirective(S);
449 }
450 
451 void StmtProfiler::VisitOMPBarrierDirective(const OMPBarrierDirective *S) {
452   VisitOMPExecutableDirective(S);
453 }
454 
455 void StmtProfiler::VisitOMPTaskwaitDirective(const OMPTaskwaitDirective *S) {
456   VisitOMPExecutableDirective(S);
457 }
458 
459 void StmtProfiler::VisitOMPFlushDirective(const OMPFlushDirective *S) {
460   VisitOMPExecutableDirective(S);
461 }
462 
463 void StmtProfiler::VisitOMPOrderedDirective(const OMPOrderedDirective *S) {
464   VisitOMPExecutableDirective(S);
465 }
466 
467 void StmtProfiler::VisitOMPAtomicDirective(const OMPAtomicDirective *S) {
468   VisitOMPExecutableDirective(S);
469 }
470 
471 void StmtProfiler::VisitOMPTargetDirective(const OMPTargetDirective *S) {
472   VisitOMPExecutableDirective(S);
473 }
474 
475 void StmtProfiler::VisitOMPTeamsDirective(const OMPTeamsDirective *S) {
476   VisitOMPExecutableDirective(S);
477 }
478 
479 void StmtProfiler::VisitExpr(const Expr *S) {
480   VisitStmt(S);
481 }
482 
483 void StmtProfiler::VisitDeclRefExpr(const DeclRefExpr *S) {
484   VisitExpr(S);
485   if (!Canonical)
486     VisitNestedNameSpecifier(S->getQualifier());
487   VisitDecl(S->getDecl());
488   if (!Canonical)
489     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
490 }
491 
492 void StmtProfiler::VisitPredefinedExpr(const PredefinedExpr *S) {
493   VisitExpr(S);
494   ID.AddInteger(S->getIdentType());
495 }
496 
497 void StmtProfiler::VisitIntegerLiteral(const IntegerLiteral *S) {
498   VisitExpr(S);
499   S->getValue().Profile(ID);
500 }
501 
502 void StmtProfiler::VisitCharacterLiteral(const CharacterLiteral *S) {
503   VisitExpr(S);
504   ID.AddInteger(S->getKind());
505   ID.AddInteger(S->getValue());
506 }
507 
508 void StmtProfiler::VisitFloatingLiteral(const FloatingLiteral *S) {
509   VisitExpr(S);
510   S->getValue().Profile(ID);
511   ID.AddBoolean(S->isExact());
512 }
513 
514 void StmtProfiler::VisitImaginaryLiteral(const ImaginaryLiteral *S) {
515   VisitExpr(S);
516 }
517 
518 void StmtProfiler::VisitStringLiteral(const StringLiteral *S) {
519   VisitExpr(S);
520   ID.AddString(S->getBytes());
521   ID.AddInteger(S->getKind());
522 }
523 
524 void StmtProfiler::VisitParenExpr(const ParenExpr *S) {
525   VisitExpr(S);
526 }
527 
528 void StmtProfiler::VisitParenListExpr(const ParenListExpr *S) {
529   VisitExpr(S);
530 }
531 
532 void StmtProfiler::VisitUnaryOperator(const UnaryOperator *S) {
533   VisitExpr(S);
534   ID.AddInteger(S->getOpcode());
535 }
536 
537 void StmtProfiler::VisitOffsetOfExpr(const OffsetOfExpr *S) {
538   VisitType(S->getTypeSourceInfo()->getType());
539   unsigned n = S->getNumComponents();
540   for (unsigned i = 0; i < n; ++i) {
541     const OffsetOfExpr::OffsetOfNode& ON = S->getComponent(i);
542     ID.AddInteger(ON.getKind());
543     switch (ON.getKind()) {
544     case OffsetOfExpr::OffsetOfNode::Array:
545       // Expressions handled below.
546       break;
547 
548     case OffsetOfExpr::OffsetOfNode::Field:
549       VisitDecl(ON.getField());
550       break;
551 
552     case OffsetOfExpr::OffsetOfNode::Identifier:
553       ID.AddPointer(ON.getFieldName());
554       break;
555 
556     case OffsetOfExpr::OffsetOfNode::Base:
557       // These nodes are implicit, and therefore don't need profiling.
558       break;
559     }
560   }
561 
562   VisitExpr(S);
563 }
564 
565 void
566 StmtProfiler::VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *S) {
567   VisitExpr(S);
568   ID.AddInteger(S->getKind());
569   if (S->isArgumentType())
570     VisitType(S->getArgumentType());
571 }
572 
573 void StmtProfiler::VisitArraySubscriptExpr(const ArraySubscriptExpr *S) {
574   VisitExpr(S);
575 }
576 
577 void StmtProfiler::VisitCallExpr(const CallExpr *S) {
578   VisitExpr(S);
579 }
580 
581 void StmtProfiler::VisitMemberExpr(const MemberExpr *S) {
582   VisitExpr(S);
583   VisitDecl(S->getMemberDecl());
584   if (!Canonical)
585     VisitNestedNameSpecifier(S->getQualifier());
586   ID.AddBoolean(S->isArrow());
587 }
588 
589 void StmtProfiler::VisitCompoundLiteralExpr(const CompoundLiteralExpr *S) {
590   VisitExpr(S);
591   ID.AddBoolean(S->isFileScope());
592 }
593 
594 void StmtProfiler::VisitCastExpr(const CastExpr *S) {
595   VisitExpr(S);
596 }
597 
598 void StmtProfiler::VisitImplicitCastExpr(const ImplicitCastExpr *S) {
599   VisitCastExpr(S);
600   ID.AddInteger(S->getValueKind());
601 }
602 
603 void StmtProfiler::VisitExplicitCastExpr(const ExplicitCastExpr *S) {
604   VisitCastExpr(S);
605   VisitType(S->getTypeAsWritten());
606 }
607 
608 void StmtProfiler::VisitCStyleCastExpr(const CStyleCastExpr *S) {
609   VisitExplicitCastExpr(S);
610 }
611 
612 void StmtProfiler::VisitBinaryOperator(const BinaryOperator *S) {
613   VisitExpr(S);
614   ID.AddInteger(S->getOpcode());
615 }
616 
617 void
618 StmtProfiler::VisitCompoundAssignOperator(const CompoundAssignOperator *S) {
619   VisitBinaryOperator(S);
620 }
621 
622 void StmtProfiler::VisitConditionalOperator(const ConditionalOperator *S) {
623   VisitExpr(S);
624 }
625 
626 void StmtProfiler::VisitBinaryConditionalOperator(
627     const BinaryConditionalOperator *S) {
628   VisitExpr(S);
629 }
630 
631 void StmtProfiler::VisitAddrLabelExpr(const AddrLabelExpr *S) {
632   VisitExpr(S);
633   VisitDecl(S->getLabel());
634 }
635 
636 void StmtProfiler::VisitStmtExpr(const StmtExpr *S) {
637   VisitExpr(S);
638 }
639 
640 void StmtProfiler::VisitShuffleVectorExpr(const ShuffleVectorExpr *S) {
641   VisitExpr(S);
642 }
643 
644 void StmtProfiler::VisitConvertVectorExpr(const ConvertVectorExpr *S) {
645   VisitExpr(S);
646 }
647 
648 void StmtProfiler::VisitChooseExpr(const ChooseExpr *S) {
649   VisitExpr(S);
650 }
651 
652 void StmtProfiler::VisitGNUNullExpr(const GNUNullExpr *S) {
653   VisitExpr(S);
654 }
655 
656 void StmtProfiler::VisitVAArgExpr(const VAArgExpr *S) {
657   VisitExpr(S);
658 }
659 
660 void StmtProfiler::VisitInitListExpr(const InitListExpr *S) {
661   if (S->getSyntacticForm()) {
662     VisitInitListExpr(S->getSyntacticForm());
663     return;
664   }
665 
666   VisitExpr(S);
667 }
668 
669 void StmtProfiler::VisitDesignatedInitExpr(const DesignatedInitExpr *S) {
670   VisitExpr(S);
671   ID.AddBoolean(S->usesGNUSyntax());
672   for (DesignatedInitExpr::const_designators_iterator D =
673          S->designators_begin(), DEnd = S->designators_end();
674        D != DEnd; ++D) {
675     if (D->isFieldDesignator()) {
676       ID.AddInteger(0);
677       VisitName(D->getFieldName());
678       continue;
679     }
680 
681     if (D->isArrayDesignator()) {
682       ID.AddInteger(1);
683     } else {
684       assert(D->isArrayRangeDesignator());
685       ID.AddInteger(2);
686     }
687     ID.AddInteger(D->getFirstExprIndex());
688   }
689 }
690 
691 void StmtProfiler::VisitImplicitValueInitExpr(const ImplicitValueInitExpr *S) {
692   VisitExpr(S);
693 }
694 
695 void StmtProfiler::VisitExtVectorElementExpr(const ExtVectorElementExpr *S) {
696   VisitExpr(S);
697   VisitName(&S->getAccessor());
698 }
699 
700 void StmtProfiler::VisitBlockExpr(const BlockExpr *S) {
701   VisitExpr(S);
702   VisitDecl(S->getBlockDecl());
703 }
704 
705 void StmtProfiler::VisitGenericSelectionExpr(const GenericSelectionExpr *S) {
706   VisitExpr(S);
707   for (unsigned i = 0; i != S->getNumAssocs(); ++i) {
708     QualType T = S->getAssocType(i);
709     if (T.isNull())
710       ID.AddPointer(nullptr);
711     else
712       VisitType(T);
713     VisitExpr(S->getAssocExpr(i));
714   }
715 }
716 
717 void StmtProfiler::VisitPseudoObjectExpr(const PseudoObjectExpr *S) {
718   VisitExpr(S);
719   for (PseudoObjectExpr::const_semantics_iterator
720          i = S->semantics_begin(), e = S->semantics_end(); i != e; ++i)
721     // Normally, we would not profile the source expressions of OVEs.
722     if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(*i))
723       Visit(OVE->getSourceExpr());
724 }
725 
726 void StmtProfiler::VisitAtomicExpr(const AtomicExpr *S) {
727   VisitExpr(S);
728   ID.AddInteger(S->getOp());
729 }
730 
731 static Stmt::StmtClass DecodeOperatorCall(const CXXOperatorCallExpr *S,
732                                           UnaryOperatorKind &UnaryOp,
733                                           BinaryOperatorKind &BinaryOp) {
734   switch (S->getOperator()) {
735   case OO_None:
736   case OO_New:
737   case OO_Delete:
738   case OO_Array_New:
739   case OO_Array_Delete:
740   case OO_Arrow:
741   case OO_Call:
742   case OO_Conditional:
743   case NUM_OVERLOADED_OPERATORS:
744     llvm_unreachable("Invalid operator call kind");
745 
746   case OO_Plus:
747     if (S->getNumArgs() == 1) {
748       UnaryOp = UO_Plus;
749       return Stmt::UnaryOperatorClass;
750     }
751 
752     BinaryOp = BO_Add;
753     return Stmt::BinaryOperatorClass;
754 
755   case OO_Minus:
756     if (S->getNumArgs() == 1) {
757       UnaryOp = UO_Minus;
758       return Stmt::UnaryOperatorClass;
759     }
760 
761     BinaryOp = BO_Sub;
762     return Stmt::BinaryOperatorClass;
763 
764   case OO_Star:
765     if (S->getNumArgs() == 1) {
766       UnaryOp = UO_Deref;
767       return Stmt::UnaryOperatorClass;
768     }
769 
770     BinaryOp = BO_Mul;
771     return Stmt::BinaryOperatorClass;
772 
773   case OO_Slash:
774     BinaryOp = BO_Div;
775     return Stmt::BinaryOperatorClass;
776 
777   case OO_Percent:
778     BinaryOp = BO_Rem;
779     return Stmt::BinaryOperatorClass;
780 
781   case OO_Caret:
782     BinaryOp = BO_Xor;
783     return Stmt::BinaryOperatorClass;
784 
785   case OO_Amp:
786     if (S->getNumArgs() == 1) {
787       UnaryOp = UO_AddrOf;
788       return Stmt::UnaryOperatorClass;
789     }
790 
791     BinaryOp = BO_And;
792     return Stmt::BinaryOperatorClass;
793 
794   case OO_Pipe:
795     BinaryOp = BO_Or;
796     return Stmt::BinaryOperatorClass;
797 
798   case OO_Tilde:
799     UnaryOp = UO_Not;
800     return Stmt::UnaryOperatorClass;
801 
802   case OO_Exclaim:
803     UnaryOp = UO_LNot;
804     return Stmt::UnaryOperatorClass;
805 
806   case OO_Equal:
807     BinaryOp = BO_Assign;
808     return Stmt::BinaryOperatorClass;
809 
810   case OO_Less:
811     BinaryOp = BO_LT;
812     return Stmt::BinaryOperatorClass;
813 
814   case OO_Greater:
815     BinaryOp = BO_GT;
816     return Stmt::BinaryOperatorClass;
817 
818   case OO_PlusEqual:
819     BinaryOp = BO_AddAssign;
820     return Stmt::CompoundAssignOperatorClass;
821 
822   case OO_MinusEqual:
823     BinaryOp = BO_SubAssign;
824     return Stmt::CompoundAssignOperatorClass;
825 
826   case OO_StarEqual:
827     BinaryOp = BO_MulAssign;
828     return Stmt::CompoundAssignOperatorClass;
829 
830   case OO_SlashEqual:
831     BinaryOp = BO_DivAssign;
832     return Stmt::CompoundAssignOperatorClass;
833 
834   case OO_PercentEqual:
835     BinaryOp = BO_RemAssign;
836     return Stmt::CompoundAssignOperatorClass;
837 
838   case OO_CaretEqual:
839     BinaryOp = BO_XorAssign;
840     return Stmt::CompoundAssignOperatorClass;
841 
842   case OO_AmpEqual:
843     BinaryOp = BO_AndAssign;
844     return Stmt::CompoundAssignOperatorClass;
845 
846   case OO_PipeEqual:
847     BinaryOp = BO_OrAssign;
848     return Stmt::CompoundAssignOperatorClass;
849 
850   case OO_LessLess:
851     BinaryOp = BO_Shl;
852     return Stmt::BinaryOperatorClass;
853 
854   case OO_GreaterGreater:
855     BinaryOp = BO_Shr;
856     return Stmt::BinaryOperatorClass;
857 
858   case OO_LessLessEqual:
859     BinaryOp = BO_ShlAssign;
860     return Stmt::CompoundAssignOperatorClass;
861 
862   case OO_GreaterGreaterEqual:
863     BinaryOp = BO_ShrAssign;
864     return Stmt::CompoundAssignOperatorClass;
865 
866   case OO_EqualEqual:
867     BinaryOp = BO_EQ;
868     return Stmt::BinaryOperatorClass;
869 
870   case OO_ExclaimEqual:
871     BinaryOp = BO_NE;
872     return Stmt::BinaryOperatorClass;
873 
874   case OO_LessEqual:
875     BinaryOp = BO_LE;
876     return Stmt::BinaryOperatorClass;
877 
878   case OO_GreaterEqual:
879     BinaryOp = BO_GE;
880     return Stmt::BinaryOperatorClass;
881 
882   case OO_AmpAmp:
883     BinaryOp = BO_LAnd;
884     return Stmt::BinaryOperatorClass;
885 
886   case OO_PipePipe:
887     BinaryOp = BO_LOr;
888     return Stmt::BinaryOperatorClass;
889 
890   case OO_PlusPlus:
891     UnaryOp = S->getNumArgs() == 1? UO_PreInc
892                                   : UO_PostInc;
893     return Stmt::UnaryOperatorClass;
894 
895   case OO_MinusMinus:
896     UnaryOp = S->getNumArgs() == 1? UO_PreDec
897                                   : UO_PostDec;
898     return Stmt::UnaryOperatorClass;
899 
900   case OO_Comma:
901     BinaryOp = BO_Comma;
902     return Stmt::BinaryOperatorClass;
903 
904 
905   case OO_ArrowStar:
906     BinaryOp = BO_PtrMemI;
907     return Stmt::BinaryOperatorClass;
908 
909   case OO_Subscript:
910     return Stmt::ArraySubscriptExprClass;
911   }
912 
913   llvm_unreachable("Invalid overloaded operator expression");
914 }
915 
916 
917 void StmtProfiler::VisitCXXOperatorCallExpr(const CXXOperatorCallExpr *S) {
918   if (S->isTypeDependent()) {
919     // Type-dependent operator calls are profiled like their underlying
920     // syntactic operator.
921     UnaryOperatorKind UnaryOp = UO_Extension;
922     BinaryOperatorKind BinaryOp = BO_Comma;
923     Stmt::StmtClass SC = DecodeOperatorCall(S, UnaryOp, BinaryOp);
924 
925     ID.AddInteger(SC);
926     for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
927       Visit(S->getArg(I));
928     if (SC == Stmt::UnaryOperatorClass)
929       ID.AddInteger(UnaryOp);
930     else if (SC == Stmt::BinaryOperatorClass ||
931              SC == Stmt::CompoundAssignOperatorClass)
932       ID.AddInteger(BinaryOp);
933     else
934       assert(SC == Stmt::ArraySubscriptExprClass);
935 
936     return;
937   }
938 
939   VisitCallExpr(S);
940   ID.AddInteger(S->getOperator());
941 }
942 
943 void StmtProfiler::VisitCXXMemberCallExpr(const CXXMemberCallExpr *S) {
944   VisitCallExpr(S);
945 }
946 
947 void StmtProfiler::VisitCUDAKernelCallExpr(const CUDAKernelCallExpr *S) {
948   VisitCallExpr(S);
949 }
950 
951 void StmtProfiler::VisitAsTypeExpr(const AsTypeExpr *S) {
952   VisitExpr(S);
953 }
954 
955 void StmtProfiler::VisitCXXNamedCastExpr(const CXXNamedCastExpr *S) {
956   VisitExplicitCastExpr(S);
957 }
958 
959 void StmtProfiler::VisitCXXStaticCastExpr(const CXXStaticCastExpr *S) {
960   VisitCXXNamedCastExpr(S);
961 }
962 
963 void StmtProfiler::VisitCXXDynamicCastExpr(const CXXDynamicCastExpr *S) {
964   VisitCXXNamedCastExpr(S);
965 }
966 
967 void
968 StmtProfiler::VisitCXXReinterpretCastExpr(const CXXReinterpretCastExpr *S) {
969   VisitCXXNamedCastExpr(S);
970 }
971 
972 void StmtProfiler::VisitCXXConstCastExpr(const CXXConstCastExpr *S) {
973   VisitCXXNamedCastExpr(S);
974 }
975 
976 void StmtProfiler::VisitUserDefinedLiteral(const UserDefinedLiteral *S) {
977   VisitCallExpr(S);
978 }
979 
980 void StmtProfiler::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *S) {
981   VisitExpr(S);
982   ID.AddBoolean(S->getValue());
983 }
984 
985 void StmtProfiler::VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *S) {
986   VisitExpr(S);
987 }
988 
989 void StmtProfiler::VisitCXXStdInitializerListExpr(
990     const CXXStdInitializerListExpr *S) {
991   VisitExpr(S);
992 }
993 
994 void StmtProfiler::VisitCXXTypeidExpr(const CXXTypeidExpr *S) {
995   VisitExpr(S);
996   if (S->isTypeOperand())
997     VisitType(S->getTypeOperandSourceInfo()->getType());
998 }
999 
1000 void StmtProfiler::VisitCXXUuidofExpr(const CXXUuidofExpr *S) {
1001   VisitExpr(S);
1002   if (S->isTypeOperand())
1003     VisitType(S->getTypeOperandSourceInfo()->getType());
1004 }
1005 
1006 void StmtProfiler::VisitMSPropertyRefExpr(const MSPropertyRefExpr *S) {
1007   VisitExpr(S);
1008   VisitDecl(S->getPropertyDecl());
1009 }
1010 
1011 void StmtProfiler::VisitCXXThisExpr(const CXXThisExpr *S) {
1012   VisitExpr(S);
1013   ID.AddBoolean(S->isImplicit());
1014 }
1015 
1016 void StmtProfiler::VisitCXXThrowExpr(const CXXThrowExpr *S) {
1017   VisitExpr(S);
1018 }
1019 
1020 void StmtProfiler::VisitCXXDefaultArgExpr(const CXXDefaultArgExpr *S) {
1021   VisitExpr(S);
1022   VisitDecl(S->getParam());
1023 }
1024 
1025 void StmtProfiler::VisitCXXDefaultInitExpr(const CXXDefaultInitExpr *S) {
1026   VisitExpr(S);
1027   VisitDecl(S->getField());
1028 }
1029 
1030 void StmtProfiler::VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *S) {
1031   VisitExpr(S);
1032   VisitDecl(
1033          const_cast<CXXDestructorDecl *>(S->getTemporary()->getDestructor()));
1034 }
1035 
1036 void StmtProfiler::VisitCXXConstructExpr(const CXXConstructExpr *S) {
1037   VisitExpr(S);
1038   VisitDecl(S->getConstructor());
1039   ID.AddBoolean(S->isElidable());
1040 }
1041 
1042 void StmtProfiler::VisitCXXFunctionalCastExpr(const CXXFunctionalCastExpr *S) {
1043   VisitExplicitCastExpr(S);
1044 }
1045 
1046 void
1047 StmtProfiler::VisitCXXTemporaryObjectExpr(const CXXTemporaryObjectExpr *S) {
1048   VisitCXXConstructExpr(S);
1049 }
1050 
1051 void
1052 StmtProfiler::VisitLambdaExpr(const LambdaExpr *S) {
1053   VisitExpr(S);
1054   for (LambdaExpr::capture_iterator C = S->explicit_capture_begin(),
1055                                  CEnd = S->explicit_capture_end();
1056        C != CEnd; ++C) {
1057     ID.AddInteger(C->getCaptureKind());
1058     switch (C->getCaptureKind()) {
1059     case LCK_This:
1060       break;
1061     case LCK_ByRef:
1062     case LCK_ByCopy:
1063       VisitDecl(C->getCapturedVar());
1064       ID.AddBoolean(C->isPackExpansion());
1065       break;
1066     case LCK_VLAType:
1067       llvm_unreachable("VLA type in explicit captures.");
1068     }
1069   }
1070   // Note: If we actually needed to be able to match lambda
1071   // expressions, we would have to consider parameters and return type
1072   // here, among other things.
1073   VisitStmt(S->getBody());
1074 }
1075 
1076 void
1077 StmtProfiler::VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *S) {
1078   VisitExpr(S);
1079 }
1080 
1081 void StmtProfiler::VisitCXXDeleteExpr(const CXXDeleteExpr *S) {
1082   VisitExpr(S);
1083   ID.AddBoolean(S->isGlobalDelete());
1084   ID.AddBoolean(S->isArrayForm());
1085   VisitDecl(S->getOperatorDelete());
1086 }
1087 
1088 
1089 void StmtProfiler::VisitCXXNewExpr(const CXXNewExpr *S) {
1090   VisitExpr(S);
1091   VisitType(S->getAllocatedType());
1092   VisitDecl(S->getOperatorNew());
1093   VisitDecl(S->getOperatorDelete());
1094   ID.AddBoolean(S->isArray());
1095   ID.AddInteger(S->getNumPlacementArgs());
1096   ID.AddBoolean(S->isGlobalNew());
1097   ID.AddBoolean(S->isParenTypeId());
1098   ID.AddInteger(S->getInitializationStyle());
1099 }
1100 
1101 void
1102 StmtProfiler::VisitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *S) {
1103   VisitExpr(S);
1104   ID.AddBoolean(S->isArrow());
1105   VisitNestedNameSpecifier(S->getQualifier());
1106   ID.AddBoolean(S->getScopeTypeInfo() != nullptr);
1107   if (S->getScopeTypeInfo())
1108     VisitType(S->getScopeTypeInfo()->getType());
1109   ID.AddBoolean(S->getDestroyedTypeInfo() != nullptr);
1110   if (S->getDestroyedTypeInfo())
1111     VisitType(S->getDestroyedType());
1112   else
1113     ID.AddPointer(S->getDestroyedTypeIdentifier());
1114 }
1115 
1116 void StmtProfiler::VisitOverloadExpr(const OverloadExpr *S) {
1117   VisitExpr(S);
1118   VisitNestedNameSpecifier(S->getQualifier());
1119   VisitName(S->getName());
1120   ID.AddBoolean(S->hasExplicitTemplateArgs());
1121   if (S->hasExplicitTemplateArgs())
1122     VisitTemplateArguments(S->getExplicitTemplateArgs().getTemplateArgs(),
1123                            S->getExplicitTemplateArgs().NumTemplateArgs);
1124 }
1125 
1126 void
1127 StmtProfiler::VisitUnresolvedLookupExpr(const UnresolvedLookupExpr *S) {
1128   VisitOverloadExpr(S);
1129 }
1130 
1131 void StmtProfiler::VisitTypeTraitExpr(const TypeTraitExpr *S) {
1132   VisitExpr(S);
1133   ID.AddInteger(S->getTrait());
1134   ID.AddInteger(S->getNumArgs());
1135   for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
1136     VisitType(S->getArg(I)->getType());
1137 }
1138 
1139 void StmtProfiler::VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *S) {
1140   VisitExpr(S);
1141   ID.AddInteger(S->getTrait());
1142   VisitType(S->getQueriedType());
1143 }
1144 
1145 void StmtProfiler::VisitExpressionTraitExpr(const ExpressionTraitExpr *S) {
1146   VisitExpr(S);
1147   ID.AddInteger(S->getTrait());
1148   VisitExpr(S->getQueriedExpression());
1149 }
1150 
1151 void StmtProfiler::VisitDependentScopeDeclRefExpr(
1152     const DependentScopeDeclRefExpr *S) {
1153   VisitExpr(S);
1154   VisitName(S->getDeclName());
1155   VisitNestedNameSpecifier(S->getQualifier());
1156   ID.AddBoolean(S->hasExplicitTemplateArgs());
1157   if (S->hasExplicitTemplateArgs())
1158     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1159 }
1160 
1161 void StmtProfiler::VisitExprWithCleanups(const ExprWithCleanups *S) {
1162   VisitExpr(S);
1163 }
1164 
1165 void StmtProfiler::VisitCXXUnresolvedConstructExpr(
1166     const CXXUnresolvedConstructExpr *S) {
1167   VisitExpr(S);
1168   VisitType(S->getTypeAsWritten());
1169 }
1170 
1171 void StmtProfiler::VisitCXXDependentScopeMemberExpr(
1172     const CXXDependentScopeMemberExpr *S) {
1173   ID.AddBoolean(S->isImplicitAccess());
1174   if (!S->isImplicitAccess()) {
1175     VisitExpr(S);
1176     ID.AddBoolean(S->isArrow());
1177   }
1178   VisitNestedNameSpecifier(S->getQualifier());
1179   VisitName(S->getMember());
1180   ID.AddBoolean(S->hasExplicitTemplateArgs());
1181   if (S->hasExplicitTemplateArgs())
1182     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1183 }
1184 
1185 void StmtProfiler::VisitUnresolvedMemberExpr(const UnresolvedMemberExpr *S) {
1186   ID.AddBoolean(S->isImplicitAccess());
1187   if (!S->isImplicitAccess()) {
1188     VisitExpr(S);
1189     ID.AddBoolean(S->isArrow());
1190   }
1191   VisitNestedNameSpecifier(S->getQualifier());
1192   VisitName(S->getMemberName());
1193   ID.AddBoolean(S->hasExplicitTemplateArgs());
1194   if (S->hasExplicitTemplateArgs())
1195     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1196 }
1197 
1198 void StmtProfiler::VisitCXXNoexceptExpr(const CXXNoexceptExpr *S) {
1199   VisitExpr(S);
1200 }
1201 
1202 void StmtProfiler::VisitPackExpansionExpr(const PackExpansionExpr *S) {
1203   VisitExpr(S);
1204 }
1205 
1206 void StmtProfiler::VisitSizeOfPackExpr(const SizeOfPackExpr *S) {
1207   VisitExpr(S);
1208   VisitDecl(S->getPack());
1209 }
1210 
1211 void StmtProfiler::VisitSubstNonTypeTemplateParmPackExpr(
1212     const SubstNonTypeTemplateParmPackExpr *S) {
1213   VisitExpr(S);
1214   VisitDecl(S->getParameterPack());
1215   VisitTemplateArgument(S->getArgumentPack());
1216 }
1217 
1218 void StmtProfiler::VisitSubstNonTypeTemplateParmExpr(
1219     const SubstNonTypeTemplateParmExpr *E) {
1220   // Profile exactly as the replacement expression.
1221   Visit(E->getReplacement());
1222 }
1223 
1224 void StmtProfiler::VisitFunctionParmPackExpr(const FunctionParmPackExpr *S) {
1225   VisitExpr(S);
1226   VisitDecl(S->getParameterPack());
1227   ID.AddInteger(S->getNumExpansions());
1228   for (FunctionParmPackExpr::iterator I = S->begin(), E = S->end(); I != E; ++I)
1229     VisitDecl(*I);
1230 }
1231 
1232 void StmtProfiler::VisitMaterializeTemporaryExpr(
1233                                            const MaterializeTemporaryExpr *S) {
1234   VisitExpr(S);
1235 }
1236 
1237 void StmtProfiler::VisitOpaqueValueExpr(const OpaqueValueExpr *E) {
1238   VisitExpr(E);
1239 }
1240 
1241 void StmtProfiler::VisitObjCStringLiteral(const ObjCStringLiteral *S) {
1242   VisitExpr(S);
1243 }
1244 
1245 void StmtProfiler::VisitObjCBoxedExpr(const ObjCBoxedExpr *E) {
1246   VisitExpr(E);
1247 }
1248 
1249 void StmtProfiler::VisitObjCArrayLiteral(const ObjCArrayLiteral *E) {
1250   VisitExpr(E);
1251 }
1252 
1253 void StmtProfiler::VisitObjCDictionaryLiteral(const ObjCDictionaryLiteral *E) {
1254   VisitExpr(E);
1255 }
1256 
1257 void StmtProfiler::VisitObjCEncodeExpr(const ObjCEncodeExpr *S) {
1258   VisitExpr(S);
1259   VisitType(S->getEncodedType());
1260 }
1261 
1262 void StmtProfiler::VisitObjCSelectorExpr(const ObjCSelectorExpr *S) {
1263   VisitExpr(S);
1264   VisitName(S->getSelector());
1265 }
1266 
1267 void StmtProfiler::VisitObjCProtocolExpr(const ObjCProtocolExpr *S) {
1268   VisitExpr(S);
1269   VisitDecl(S->getProtocol());
1270 }
1271 
1272 void StmtProfiler::VisitObjCIvarRefExpr(const ObjCIvarRefExpr *S) {
1273   VisitExpr(S);
1274   VisitDecl(S->getDecl());
1275   ID.AddBoolean(S->isArrow());
1276   ID.AddBoolean(S->isFreeIvar());
1277 }
1278 
1279 void StmtProfiler::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *S) {
1280   VisitExpr(S);
1281   if (S->isImplicitProperty()) {
1282     VisitDecl(S->getImplicitPropertyGetter());
1283     VisitDecl(S->getImplicitPropertySetter());
1284   } else {
1285     VisitDecl(S->getExplicitProperty());
1286   }
1287   if (S->isSuperReceiver()) {
1288     ID.AddBoolean(S->isSuperReceiver());
1289     VisitType(S->getSuperReceiverType());
1290   }
1291 }
1292 
1293 void StmtProfiler::VisitObjCSubscriptRefExpr(const ObjCSubscriptRefExpr *S) {
1294   VisitExpr(S);
1295   VisitDecl(S->getAtIndexMethodDecl());
1296   VisitDecl(S->setAtIndexMethodDecl());
1297 }
1298 
1299 void StmtProfiler::VisitObjCMessageExpr(const ObjCMessageExpr *S) {
1300   VisitExpr(S);
1301   VisitName(S->getSelector());
1302   VisitDecl(S->getMethodDecl());
1303 }
1304 
1305 void StmtProfiler::VisitObjCIsaExpr(const ObjCIsaExpr *S) {
1306   VisitExpr(S);
1307   ID.AddBoolean(S->isArrow());
1308 }
1309 
1310 void StmtProfiler::VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *S) {
1311   VisitExpr(S);
1312   ID.AddBoolean(S->getValue());
1313 }
1314 
1315 void StmtProfiler::VisitObjCIndirectCopyRestoreExpr(
1316     const ObjCIndirectCopyRestoreExpr *S) {
1317   VisitExpr(S);
1318   ID.AddBoolean(S->shouldCopy());
1319 }
1320 
1321 void StmtProfiler::VisitObjCBridgedCastExpr(const ObjCBridgedCastExpr *S) {
1322   VisitExplicitCastExpr(S);
1323   ID.AddBoolean(S->getBridgeKind());
1324 }
1325 
1326 void StmtProfiler::VisitDecl(const Decl *D) {
1327   ID.AddInteger(D? D->getKind() : 0);
1328 
1329   if (Canonical && D) {
1330     if (const NonTypeTemplateParmDecl *NTTP =
1331           dyn_cast<NonTypeTemplateParmDecl>(D)) {
1332       ID.AddInteger(NTTP->getDepth());
1333       ID.AddInteger(NTTP->getIndex());
1334       ID.AddBoolean(NTTP->isParameterPack());
1335       VisitType(NTTP->getType());
1336       return;
1337     }
1338 
1339     if (const ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D)) {
1340       // The Itanium C++ ABI uses the type, scope depth, and scope
1341       // index of a parameter when mangling expressions that involve
1342       // function parameters, so we will use the parameter's type for
1343       // establishing function parameter identity. That way, our
1344       // definition of "equivalent" (per C++ [temp.over.link]) is at
1345       // least as strong as the definition of "equivalent" used for
1346       // name mangling.
1347       VisitType(Parm->getType());
1348       ID.AddInteger(Parm->getFunctionScopeDepth());
1349       ID.AddInteger(Parm->getFunctionScopeIndex());
1350       return;
1351     }
1352 
1353     if (const TemplateTypeParmDecl *TTP =
1354           dyn_cast<TemplateTypeParmDecl>(D)) {
1355       ID.AddInteger(TTP->getDepth());
1356       ID.AddInteger(TTP->getIndex());
1357       ID.AddBoolean(TTP->isParameterPack());
1358       return;
1359     }
1360 
1361     if (const TemplateTemplateParmDecl *TTP =
1362           dyn_cast<TemplateTemplateParmDecl>(D)) {
1363       ID.AddInteger(TTP->getDepth());
1364       ID.AddInteger(TTP->getIndex());
1365       ID.AddBoolean(TTP->isParameterPack());
1366       return;
1367     }
1368   }
1369 
1370   ID.AddPointer(D? D->getCanonicalDecl() : nullptr);
1371 }
1372 
1373 void StmtProfiler::VisitType(QualType T) {
1374   if (Canonical)
1375     T = Context.getCanonicalType(T);
1376 
1377   ID.AddPointer(T.getAsOpaquePtr());
1378 }
1379 
1380 void StmtProfiler::VisitName(DeclarationName Name) {
1381   ID.AddPointer(Name.getAsOpaquePtr());
1382 }
1383 
1384 void StmtProfiler::VisitNestedNameSpecifier(NestedNameSpecifier *NNS) {
1385   if (Canonical)
1386     NNS = Context.getCanonicalNestedNameSpecifier(NNS);
1387   ID.AddPointer(NNS);
1388 }
1389 
1390 void StmtProfiler::VisitTemplateName(TemplateName Name) {
1391   if (Canonical)
1392     Name = Context.getCanonicalTemplateName(Name);
1393 
1394   Name.Profile(ID);
1395 }
1396 
1397 void StmtProfiler::VisitTemplateArguments(const TemplateArgumentLoc *Args,
1398                                           unsigned NumArgs) {
1399   ID.AddInteger(NumArgs);
1400   for (unsigned I = 0; I != NumArgs; ++I)
1401     VisitTemplateArgument(Args[I].getArgument());
1402 }
1403 
1404 void StmtProfiler::VisitTemplateArgument(const TemplateArgument &Arg) {
1405   // Mostly repetitive with TemplateArgument::Profile!
1406   ID.AddInteger(Arg.getKind());
1407   switch (Arg.getKind()) {
1408   case TemplateArgument::Null:
1409     break;
1410 
1411   case TemplateArgument::Type:
1412     VisitType(Arg.getAsType());
1413     break;
1414 
1415   case TemplateArgument::Template:
1416   case TemplateArgument::TemplateExpansion:
1417     VisitTemplateName(Arg.getAsTemplateOrTemplatePattern());
1418     break;
1419 
1420   case TemplateArgument::Declaration:
1421     VisitDecl(Arg.getAsDecl());
1422     break;
1423 
1424   case TemplateArgument::NullPtr:
1425     VisitType(Arg.getNullPtrType());
1426     break;
1427 
1428   case TemplateArgument::Integral:
1429     Arg.getAsIntegral().Profile(ID);
1430     VisitType(Arg.getIntegralType());
1431     break;
1432 
1433   case TemplateArgument::Expression:
1434     Visit(Arg.getAsExpr());
1435     break;
1436 
1437   case TemplateArgument::Pack:
1438     for (const auto &P : Arg.pack_elements())
1439       VisitTemplateArgument(P);
1440     break;
1441   }
1442 }
1443 
1444 void Stmt::Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
1445                    bool Canonical) const {
1446   StmtProfiler Profiler(ID, Context, Canonical);
1447   Profiler.Visit(this);
1448 }
1449