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 (const Stmt *SubStmt : S->children()) {
73     if (SubStmt)
74       Visit(SubStmt);
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     if (C->getHelperChunkSize()) {
304       Profiler->VisitStmt(C->getChunkSize());
305     }
306   }
307 }
308 
309 void OMPClauseProfiler::VisitOMPOrderedClause(const OMPOrderedClause *C) {
310   if (auto *Num = C->getNumForLoops())
311     Profiler->VisitStmt(Num);
312 }
313 
314 void OMPClauseProfiler::VisitOMPNowaitClause(const OMPNowaitClause *) {}
315 
316 void OMPClauseProfiler::VisitOMPUntiedClause(const OMPUntiedClause *) {}
317 
318 void OMPClauseProfiler::VisitOMPMergeableClause(const OMPMergeableClause *) {}
319 
320 void OMPClauseProfiler::VisitOMPReadClause(const OMPReadClause *) {}
321 
322 void OMPClauseProfiler::VisitOMPWriteClause(const OMPWriteClause *) {}
323 
324 void OMPClauseProfiler::VisitOMPUpdateClause(const OMPUpdateClause *) {}
325 
326 void OMPClauseProfiler::VisitOMPCaptureClause(const OMPCaptureClause *) {}
327 
328 void OMPClauseProfiler::VisitOMPSeqCstClause(const OMPSeqCstClause *) {}
329 
330 template<typename T>
331 void OMPClauseProfiler::VisitOMPClauseList(T *Node) {
332   for (auto *E : Node->varlists()) {
333     Profiler->VisitStmt(E);
334   }
335 }
336 
337 void OMPClauseProfiler::VisitOMPPrivateClause(const OMPPrivateClause *C) {
338   VisitOMPClauseList(C);
339   for (auto *E : C->private_copies()) {
340     Profiler->VisitStmt(E);
341   }
342 }
343 void
344 OMPClauseProfiler::VisitOMPFirstprivateClause(const OMPFirstprivateClause *C) {
345   VisitOMPClauseList(C);
346   for (auto *E : C->private_copies()) {
347     Profiler->VisitStmt(E);
348   }
349   for (auto *E : C->inits()) {
350     Profiler->VisitStmt(E);
351   }
352 }
353 void
354 OMPClauseProfiler::VisitOMPLastprivateClause(const OMPLastprivateClause *C) {
355   VisitOMPClauseList(C);
356   for (auto *E : C->source_exprs()) {
357     Profiler->VisitStmt(E);
358   }
359   for (auto *E : C->destination_exprs()) {
360     Profiler->VisitStmt(E);
361   }
362   for (auto *E : C->assignment_ops()) {
363     Profiler->VisitStmt(E);
364   }
365 }
366 void OMPClauseProfiler::VisitOMPSharedClause(const OMPSharedClause *C) {
367   VisitOMPClauseList(C);
368 }
369 void OMPClauseProfiler::VisitOMPReductionClause(
370                                          const OMPReductionClause *C) {
371   Profiler->VisitNestedNameSpecifier(
372       C->getQualifierLoc().getNestedNameSpecifier());
373   Profiler->VisitName(C->getNameInfo().getName());
374   VisitOMPClauseList(C);
375   for (auto *E : C->lhs_exprs()) {
376     Profiler->VisitStmt(E);
377   }
378   for (auto *E : C->rhs_exprs()) {
379     Profiler->VisitStmt(E);
380   }
381   for (auto *E : C->reduction_ops()) {
382     Profiler->VisitStmt(E);
383   }
384 }
385 void OMPClauseProfiler::VisitOMPLinearClause(const OMPLinearClause *C) {
386   VisitOMPClauseList(C);
387   for (auto *E : C->inits()) {
388     Profiler->VisitStmt(E);
389   }
390   for (auto *E : C->updates()) {
391     Profiler->VisitStmt(E);
392   }
393   for (auto *E : C->finals()) {
394     Profiler->VisitStmt(E);
395   }
396   Profiler->VisitStmt(C->getStep());
397   Profiler->VisitStmt(C->getCalcStep());
398 }
399 void OMPClauseProfiler::VisitOMPAlignedClause(const OMPAlignedClause *C) {
400   VisitOMPClauseList(C);
401   Profiler->VisitStmt(C->getAlignment());
402 }
403 void OMPClauseProfiler::VisitOMPCopyinClause(const OMPCopyinClause *C) {
404   VisitOMPClauseList(C);
405   for (auto *E : C->source_exprs()) {
406     Profiler->VisitStmt(E);
407   }
408   for (auto *E : C->destination_exprs()) {
409     Profiler->VisitStmt(E);
410   }
411   for (auto *E : C->assignment_ops()) {
412     Profiler->VisitStmt(E);
413   }
414 }
415 void
416 OMPClauseProfiler::VisitOMPCopyprivateClause(const OMPCopyprivateClause *C) {
417   VisitOMPClauseList(C);
418   for (auto *E : C->source_exprs()) {
419     Profiler->VisitStmt(E);
420   }
421   for (auto *E : C->destination_exprs()) {
422     Profiler->VisitStmt(E);
423   }
424   for (auto *E : C->assignment_ops()) {
425     Profiler->VisitStmt(E);
426   }
427 }
428 void OMPClauseProfiler::VisitOMPFlushClause(const OMPFlushClause *C) {
429   VisitOMPClauseList(C);
430 }
431 void OMPClauseProfiler::VisitOMPDependClause(const OMPDependClause *C) {
432   VisitOMPClauseList(C);
433 }
434 }
435 
436 void
437 StmtProfiler::VisitOMPExecutableDirective(const OMPExecutableDirective *S) {
438   VisitStmt(S);
439   OMPClauseProfiler P(this);
440   ArrayRef<OMPClause *> Clauses = S->clauses();
441   for (ArrayRef<OMPClause *>::iterator I = Clauses.begin(), E = Clauses.end();
442        I != E; ++I)
443     if (*I)
444       P.Visit(*I);
445 }
446 
447 void StmtProfiler::VisitOMPLoopDirective(const OMPLoopDirective *S) {
448   VisitOMPExecutableDirective(S);
449 }
450 
451 void StmtProfiler::VisitOMPParallelDirective(const OMPParallelDirective *S) {
452   VisitOMPExecutableDirective(S);
453 }
454 
455 void StmtProfiler::VisitOMPSimdDirective(const OMPSimdDirective *S) {
456   VisitOMPLoopDirective(S);
457 }
458 
459 void StmtProfiler::VisitOMPForDirective(const OMPForDirective *S) {
460   VisitOMPLoopDirective(S);
461 }
462 
463 void StmtProfiler::VisitOMPForSimdDirective(const OMPForSimdDirective *S) {
464   VisitOMPLoopDirective(S);
465 }
466 
467 void StmtProfiler::VisitOMPSectionsDirective(const OMPSectionsDirective *S) {
468   VisitOMPExecutableDirective(S);
469 }
470 
471 void StmtProfiler::VisitOMPSectionDirective(const OMPSectionDirective *S) {
472   VisitOMPExecutableDirective(S);
473 }
474 
475 void StmtProfiler::VisitOMPSingleDirective(const OMPSingleDirective *S) {
476   VisitOMPExecutableDirective(S);
477 }
478 
479 void StmtProfiler::VisitOMPMasterDirective(const OMPMasterDirective *S) {
480   VisitOMPExecutableDirective(S);
481 }
482 
483 void StmtProfiler::VisitOMPCriticalDirective(const OMPCriticalDirective *S) {
484   VisitOMPExecutableDirective(S);
485   VisitName(S->getDirectiveName().getName());
486 }
487 
488 void
489 StmtProfiler::VisitOMPParallelForDirective(const OMPParallelForDirective *S) {
490   VisitOMPLoopDirective(S);
491 }
492 
493 void StmtProfiler::VisitOMPParallelForSimdDirective(
494     const OMPParallelForSimdDirective *S) {
495   VisitOMPLoopDirective(S);
496 }
497 
498 void StmtProfiler::VisitOMPParallelSectionsDirective(
499     const OMPParallelSectionsDirective *S) {
500   VisitOMPExecutableDirective(S);
501 }
502 
503 void StmtProfiler::VisitOMPTaskDirective(const OMPTaskDirective *S) {
504   VisitOMPExecutableDirective(S);
505 }
506 
507 void StmtProfiler::VisitOMPTaskyieldDirective(const OMPTaskyieldDirective *S) {
508   VisitOMPExecutableDirective(S);
509 }
510 
511 void StmtProfiler::VisitOMPBarrierDirective(const OMPBarrierDirective *S) {
512   VisitOMPExecutableDirective(S);
513 }
514 
515 void StmtProfiler::VisitOMPTaskwaitDirective(const OMPTaskwaitDirective *S) {
516   VisitOMPExecutableDirective(S);
517 }
518 
519 void StmtProfiler::VisitOMPTaskgroupDirective(const OMPTaskgroupDirective *S) {
520   VisitOMPExecutableDirective(S);
521 }
522 
523 void StmtProfiler::VisitOMPFlushDirective(const OMPFlushDirective *S) {
524   VisitOMPExecutableDirective(S);
525 }
526 
527 void StmtProfiler::VisitOMPOrderedDirective(const OMPOrderedDirective *S) {
528   VisitOMPExecutableDirective(S);
529 }
530 
531 void StmtProfiler::VisitOMPAtomicDirective(const OMPAtomicDirective *S) {
532   VisitOMPExecutableDirective(S);
533 }
534 
535 void StmtProfiler::VisitOMPTargetDirective(const OMPTargetDirective *S) {
536   VisitOMPExecutableDirective(S);
537 }
538 
539 void StmtProfiler::VisitOMPTargetDataDirective(const OMPTargetDataDirective *S) {
540   VisitOMPExecutableDirective(S);
541 }
542 
543 void StmtProfiler::VisitOMPTeamsDirective(const OMPTeamsDirective *S) {
544   VisitOMPExecutableDirective(S);
545 }
546 
547 void StmtProfiler::VisitOMPCancellationPointDirective(
548     const OMPCancellationPointDirective *S) {
549   VisitOMPExecutableDirective(S);
550 }
551 
552 void StmtProfiler::VisitOMPCancelDirective(const OMPCancelDirective *S) {
553   VisitOMPExecutableDirective(S);
554 }
555 
556 void StmtProfiler::VisitExpr(const Expr *S) {
557   VisitStmt(S);
558 }
559 
560 void StmtProfiler::VisitDeclRefExpr(const DeclRefExpr *S) {
561   VisitExpr(S);
562   if (!Canonical)
563     VisitNestedNameSpecifier(S->getQualifier());
564   VisitDecl(S->getDecl());
565   if (!Canonical)
566     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
567 }
568 
569 void StmtProfiler::VisitPredefinedExpr(const PredefinedExpr *S) {
570   VisitExpr(S);
571   ID.AddInteger(S->getIdentType());
572 }
573 
574 void StmtProfiler::VisitIntegerLiteral(const IntegerLiteral *S) {
575   VisitExpr(S);
576   S->getValue().Profile(ID);
577   ID.AddInteger(S->getType()->castAs<BuiltinType>()->getKind());
578 }
579 
580 void StmtProfiler::VisitCharacterLiteral(const CharacterLiteral *S) {
581   VisitExpr(S);
582   ID.AddInteger(S->getKind());
583   ID.AddInteger(S->getValue());
584 }
585 
586 void StmtProfiler::VisitFloatingLiteral(const FloatingLiteral *S) {
587   VisitExpr(S);
588   S->getValue().Profile(ID);
589   ID.AddBoolean(S->isExact());
590   ID.AddInteger(S->getType()->castAs<BuiltinType>()->getKind());
591 }
592 
593 void StmtProfiler::VisitImaginaryLiteral(const ImaginaryLiteral *S) {
594   VisitExpr(S);
595 }
596 
597 void StmtProfiler::VisitStringLiteral(const StringLiteral *S) {
598   VisitExpr(S);
599   ID.AddString(S->getBytes());
600   ID.AddInteger(S->getKind());
601 }
602 
603 void StmtProfiler::VisitParenExpr(const ParenExpr *S) {
604   VisitExpr(S);
605 }
606 
607 void StmtProfiler::VisitParenListExpr(const ParenListExpr *S) {
608   VisitExpr(S);
609 }
610 
611 void StmtProfiler::VisitUnaryOperator(const UnaryOperator *S) {
612   VisitExpr(S);
613   ID.AddInteger(S->getOpcode());
614 }
615 
616 void StmtProfiler::VisitOffsetOfExpr(const OffsetOfExpr *S) {
617   VisitType(S->getTypeSourceInfo()->getType());
618   unsigned n = S->getNumComponents();
619   for (unsigned i = 0; i < n; ++i) {
620     const OffsetOfExpr::OffsetOfNode& ON = S->getComponent(i);
621     ID.AddInteger(ON.getKind());
622     switch (ON.getKind()) {
623     case OffsetOfExpr::OffsetOfNode::Array:
624       // Expressions handled below.
625       break;
626 
627     case OffsetOfExpr::OffsetOfNode::Field:
628       VisitDecl(ON.getField());
629       break;
630 
631     case OffsetOfExpr::OffsetOfNode::Identifier:
632       ID.AddPointer(ON.getFieldName());
633       break;
634 
635     case OffsetOfExpr::OffsetOfNode::Base:
636       // These nodes are implicit, and therefore don't need profiling.
637       break;
638     }
639   }
640 
641   VisitExpr(S);
642 }
643 
644 void
645 StmtProfiler::VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *S) {
646   VisitExpr(S);
647   ID.AddInteger(S->getKind());
648   if (S->isArgumentType())
649     VisitType(S->getArgumentType());
650 }
651 
652 void StmtProfiler::VisitArraySubscriptExpr(const ArraySubscriptExpr *S) {
653   VisitExpr(S);
654 }
655 
656 void StmtProfiler::VisitCallExpr(const CallExpr *S) {
657   VisitExpr(S);
658 }
659 
660 void StmtProfiler::VisitMemberExpr(const MemberExpr *S) {
661   VisitExpr(S);
662   VisitDecl(S->getMemberDecl());
663   if (!Canonical)
664     VisitNestedNameSpecifier(S->getQualifier());
665   ID.AddBoolean(S->isArrow());
666 }
667 
668 void StmtProfiler::VisitCompoundLiteralExpr(const CompoundLiteralExpr *S) {
669   VisitExpr(S);
670   ID.AddBoolean(S->isFileScope());
671 }
672 
673 void StmtProfiler::VisitCastExpr(const CastExpr *S) {
674   VisitExpr(S);
675 }
676 
677 void StmtProfiler::VisitImplicitCastExpr(const ImplicitCastExpr *S) {
678   VisitCastExpr(S);
679   ID.AddInteger(S->getValueKind());
680 }
681 
682 void StmtProfiler::VisitExplicitCastExpr(const ExplicitCastExpr *S) {
683   VisitCastExpr(S);
684   VisitType(S->getTypeAsWritten());
685 }
686 
687 void StmtProfiler::VisitCStyleCastExpr(const CStyleCastExpr *S) {
688   VisitExplicitCastExpr(S);
689 }
690 
691 void StmtProfiler::VisitBinaryOperator(const BinaryOperator *S) {
692   VisitExpr(S);
693   ID.AddInteger(S->getOpcode());
694 }
695 
696 void
697 StmtProfiler::VisitCompoundAssignOperator(const CompoundAssignOperator *S) {
698   VisitBinaryOperator(S);
699 }
700 
701 void StmtProfiler::VisitConditionalOperator(const ConditionalOperator *S) {
702   VisitExpr(S);
703 }
704 
705 void StmtProfiler::VisitBinaryConditionalOperator(
706     const BinaryConditionalOperator *S) {
707   VisitExpr(S);
708 }
709 
710 void StmtProfiler::VisitAddrLabelExpr(const AddrLabelExpr *S) {
711   VisitExpr(S);
712   VisitDecl(S->getLabel());
713 }
714 
715 void StmtProfiler::VisitStmtExpr(const StmtExpr *S) {
716   VisitExpr(S);
717 }
718 
719 void StmtProfiler::VisitShuffleVectorExpr(const ShuffleVectorExpr *S) {
720   VisitExpr(S);
721 }
722 
723 void StmtProfiler::VisitConvertVectorExpr(const ConvertVectorExpr *S) {
724   VisitExpr(S);
725 }
726 
727 void StmtProfiler::VisitChooseExpr(const ChooseExpr *S) {
728   VisitExpr(S);
729 }
730 
731 void StmtProfiler::VisitGNUNullExpr(const GNUNullExpr *S) {
732   VisitExpr(S);
733 }
734 
735 void StmtProfiler::VisitVAArgExpr(const VAArgExpr *S) {
736   VisitExpr(S);
737 }
738 
739 void StmtProfiler::VisitInitListExpr(const InitListExpr *S) {
740   if (S->getSyntacticForm()) {
741     VisitInitListExpr(S->getSyntacticForm());
742     return;
743   }
744 
745   VisitExpr(S);
746 }
747 
748 void StmtProfiler::VisitDesignatedInitExpr(const DesignatedInitExpr *S) {
749   VisitExpr(S);
750   ID.AddBoolean(S->usesGNUSyntax());
751   for (DesignatedInitExpr::const_designators_iterator D =
752          S->designators_begin(), DEnd = S->designators_end();
753        D != DEnd; ++D) {
754     if (D->isFieldDesignator()) {
755       ID.AddInteger(0);
756       VisitName(D->getFieldName());
757       continue;
758     }
759 
760     if (D->isArrayDesignator()) {
761       ID.AddInteger(1);
762     } else {
763       assert(D->isArrayRangeDesignator());
764       ID.AddInteger(2);
765     }
766     ID.AddInteger(D->getFirstExprIndex());
767   }
768 }
769 
770 // Seems that if VisitInitListExpr() only works on the syntactic form of an
771 // InitListExpr, then a DesignatedInitUpdateExpr is not encountered.
772 void StmtProfiler::VisitDesignatedInitUpdateExpr(
773     const DesignatedInitUpdateExpr *S) {
774   llvm_unreachable("Unexpected DesignatedInitUpdateExpr in syntactic form of "
775                    "initializer");
776 }
777 
778 void StmtProfiler::VisitNoInitExpr(const NoInitExpr *S) {
779   llvm_unreachable("Unexpected NoInitExpr in syntactic form of initializer");
780 }
781 
782 void StmtProfiler::VisitImplicitValueInitExpr(const ImplicitValueInitExpr *S) {
783   VisitExpr(S);
784 }
785 
786 void StmtProfiler::VisitExtVectorElementExpr(const ExtVectorElementExpr *S) {
787   VisitExpr(S);
788   VisitName(&S->getAccessor());
789 }
790 
791 void StmtProfiler::VisitBlockExpr(const BlockExpr *S) {
792   VisitExpr(S);
793   VisitDecl(S->getBlockDecl());
794 }
795 
796 void StmtProfiler::VisitGenericSelectionExpr(const GenericSelectionExpr *S) {
797   VisitExpr(S);
798   for (unsigned i = 0; i != S->getNumAssocs(); ++i) {
799     QualType T = S->getAssocType(i);
800     if (T.isNull())
801       ID.AddPointer(nullptr);
802     else
803       VisitType(T);
804     VisitExpr(S->getAssocExpr(i));
805   }
806 }
807 
808 void StmtProfiler::VisitPseudoObjectExpr(const PseudoObjectExpr *S) {
809   VisitExpr(S);
810   for (PseudoObjectExpr::const_semantics_iterator
811          i = S->semantics_begin(), e = S->semantics_end(); i != e; ++i)
812     // Normally, we would not profile the source expressions of OVEs.
813     if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(*i))
814       Visit(OVE->getSourceExpr());
815 }
816 
817 void StmtProfiler::VisitAtomicExpr(const AtomicExpr *S) {
818   VisitExpr(S);
819   ID.AddInteger(S->getOp());
820 }
821 
822 static Stmt::StmtClass DecodeOperatorCall(const CXXOperatorCallExpr *S,
823                                           UnaryOperatorKind &UnaryOp,
824                                           BinaryOperatorKind &BinaryOp) {
825   switch (S->getOperator()) {
826   case OO_None:
827   case OO_New:
828   case OO_Delete:
829   case OO_Array_New:
830   case OO_Array_Delete:
831   case OO_Arrow:
832   case OO_Call:
833   case OO_Conditional:
834   case NUM_OVERLOADED_OPERATORS:
835     llvm_unreachable("Invalid operator call kind");
836 
837   case OO_Plus:
838     if (S->getNumArgs() == 1) {
839       UnaryOp = UO_Plus;
840       return Stmt::UnaryOperatorClass;
841     }
842 
843     BinaryOp = BO_Add;
844     return Stmt::BinaryOperatorClass;
845 
846   case OO_Minus:
847     if (S->getNumArgs() == 1) {
848       UnaryOp = UO_Minus;
849       return Stmt::UnaryOperatorClass;
850     }
851 
852     BinaryOp = BO_Sub;
853     return Stmt::BinaryOperatorClass;
854 
855   case OO_Star:
856     if (S->getNumArgs() == 1) {
857       UnaryOp = UO_Deref;
858       return Stmt::UnaryOperatorClass;
859     }
860 
861     BinaryOp = BO_Mul;
862     return Stmt::BinaryOperatorClass;
863 
864   case OO_Slash:
865     BinaryOp = BO_Div;
866     return Stmt::BinaryOperatorClass;
867 
868   case OO_Percent:
869     BinaryOp = BO_Rem;
870     return Stmt::BinaryOperatorClass;
871 
872   case OO_Caret:
873     BinaryOp = BO_Xor;
874     return Stmt::BinaryOperatorClass;
875 
876   case OO_Amp:
877     if (S->getNumArgs() == 1) {
878       UnaryOp = UO_AddrOf;
879       return Stmt::UnaryOperatorClass;
880     }
881 
882     BinaryOp = BO_And;
883     return Stmt::BinaryOperatorClass;
884 
885   case OO_Pipe:
886     BinaryOp = BO_Or;
887     return Stmt::BinaryOperatorClass;
888 
889   case OO_Tilde:
890     UnaryOp = UO_Not;
891     return Stmt::UnaryOperatorClass;
892 
893   case OO_Exclaim:
894     UnaryOp = UO_LNot;
895     return Stmt::UnaryOperatorClass;
896 
897   case OO_Equal:
898     BinaryOp = BO_Assign;
899     return Stmt::BinaryOperatorClass;
900 
901   case OO_Less:
902     BinaryOp = BO_LT;
903     return Stmt::BinaryOperatorClass;
904 
905   case OO_Greater:
906     BinaryOp = BO_GT;
907     return Stmt::BinaryOperatorClass;
908 
909   case OO_PlusEqual:
910     BinaryOp = BO_AddAssign;
911     return Stmt::CompoundAssignOperatorClass;
912 
913   case OO_MinusEqual:
914     BinaryOp = BO_SubAssign;
915     return Stmt::CompoundAssignOperatorClass;
916 
917   case OO_StarEqual:
918     BinaryOp = BO_MulAssign;
919     return Stmt::CompoundAssignOperatorClass;
920 
921   case OO_SlashEqual:
922     BinaryOp = BO_DivAssign;
923     return Stmt::CompoundAssignOperatorClass;
924 
925   case OO_PercentEqual:
926     BinaryOp = BO_RemAssign;
927     return Stmt::CompoundAssignOperatorClass;
928 
929   case OO_CaretEqual:
930     BinaryOp = BO_XorAssign;
931     return Stmt::CompoundAssignOperatorClass;
932 
933   case OO_AmpEqual:
934     BinaryOp = BO_AndAssign;
935     return Stmt::CompoundAssignOperatorClass;
936 
937   case OO_PipeEqual:
938     BinaryOp = BO_OrAssign;
939     return Stmt::CompoundAssignOperatorClass;
940 
941   case OO_LessLess:
942     BinaryOp = BO_Shl;
943     return Stmt::BinaryOperatorClass;
944 
945   case OO_GreaterGreater:
946     BinaryOp = BO_Shr;
947     return Stmt::BinaryOperatorClass;
948 
949   case OO_LessLessEqual:
950     BinaryOp = BO_ShlAssign;
951     return Stmt::CompoundAssignOperatorClass;
952 
953   case OO_GreaterGreaterEqual:
954     BinaryOp = BO_ShrAssign;
955     return Stmt::CompoundAssignOperatorClass;
956 
957   case OO_EqualEqual:
958     BinaryOp = BO_EQ;
959     return Stmt::BinaryOperatorClass;
960 
961   case OO_ExclaimEqual:
962     BinaryOp = BO_NE;
963     return Stmt::BinaryOperatorClass;
964 
965   case OO_LessEqual:
966     BinaryOp = BO_LE;
967     return Stmt::BinaryOperatorClass;
968 
969   case OO_GreaterEqual:
970     BinaryOp = BO_GE;
971     return Stmt::BinaryOperatorClass;
972 
973   case OO_AmpAmp:
974     BinaryOp = BO_LAnd;
975     return Stmt::BinaryOperatorClass;
976 
977   case OO_PipePipe:
978     BinaryOp = BO_LOr;
979     return Stmt::BinaryOperatorClass;
980 
981   case OO_PlusPlus:
982     UnaryOp = S->getNumArgs() == 1? UO_PreInc
983                                   : UO_PostInc;
984     return Stmt::UnaryOperatorClass;
985 
986   case OO_MinusMinus:
987     UnaryOp = S->getNumArgs() == 1? UO_PreDec
988                                   : UO_PostDec;
989     return Stmt::UnaryOperatorClass;
990 
991   case OO_Comma:
992     BinaryOp = BO_Comma;
993     return Stmt::BinaryOperatorClass;
994 
995 
996   case OO_ArrowStar:
997     BinaryOp = BO_PtrMemI;
998     return Stmt::BinaryOperatorClass;
999 
1000   case OO_Subscript:
1001     return Stmt::ArraySubscriptExprClass;
1002   }
1003 
1004   llvm_unreachable("Invalid overloaded operator expression");
1005 }
1006 
1007 
1008 void StmtProfiler::VisitCXXOperatorCallExpr(const CXXOperatorCallExpr *S) {
1009   if (S->isTypeDependent()) {
1010     // Type-dependent operator calls are profiled like their underlying
1011     // syntactic operator.
1012     UnaryOperatorKind UnaryOp = UO_Extension;
1013     BinaryOperatorKind BinaryOp = BO_Comma;
1014     Stmt::StmtClass SC = DecodeOperatorCall(S, UnaryOp, BinaryOp);
1015 
1016     ID.AddInteger(SC);
1017     for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
1018       Visit(S->getArg(I));
1019     if (SC == Stmt::UnaryOperatorClass)
1020       ID.AddInteger(UnaryOp);
1021     else if (SC == Stmt::BinaryOperatorClass ||
1022              SC == Stmt::CompoundAssignOperatorClass)
1023       ID.AddInteger(BinaryOp);
1024     else
1025       assert(SC == Stmt::ArraySubscriptExprClass);
1026 
1027     return;
1028   }
1029 
1030   VisitCallExpr(S);
1031   ID.AddInteger(S->getOperator());
1032 }
1033 
1034 void StmtProfiler::VisitCXXMemberCallExpr(const CXXMemberCallExpr *S) {
1035   VisitCallExpr(S);
1036 }
1037 
1038 void StmtProfiler::VisitCUDAKernelCallExpr(const CUDAKernelCallExpr *S) {
1039   VisitCallExpr(S);
1040 }
1041 
1042 void StmtProfiler::VisitAsTypeExpr(const AsTypeExpr *S) {
1043   VisitExpr(S);
1044 }
1045 
1046 void StmtProfiler::VisitCXXNamedCastExpr(const CXXNamedCastExpr *S) {
1047   VisitExplicitCastExpr(S);
1048 }
1049 
1050 void StmtProfiler::VisitCXXStaticCastExpr(const CXXStaticCastExpr *S) {
1051   VisitCXXNamedCastExpr(S);
1052 }
1053 
1054 void StmtProfiler::VisitCXXDynamicCastExpr(const CXXDynamicCastExpr *S) {
1055   VisitCXXNamedCastExpr(S);
1056 }
1057 
1058 void
1059 StmtProfiler::VisitCXXReinterpretCastExpr(const CXXReinterpretCastExpr *S) {
1060   VisitCXXNamedCastExpr(S);
1061 }
1062 
1063 void StmtProfiler::VisitCXXConstCastExpr(const CXXConstCastExpr *S) {
1064   VisitCXXNamedCastExpr(S);
1065 }
1066 
1067 void StmtProfiler::VisitUserDefinedLiteral(const UserDefinedLiteral *S) {
1068   VisitCallExpr(S);
1069 }
1070 
1071 void StmtProfiler::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *S) {
1072   VisitExpr(S);
1073   ID.AddBoolean(S->getValue());
1074 }
1075 
1076 void StmtProfiler::VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *S) {
1077   VisitExpr(S);
1078 }
1079 
1080 void StmtProfiler::VisitCXXStdInitializerListExpr(
1081     const CXXStdInitializerListExpr *S) {
1082   VisitExpr(S);
1083 }
1084 
1085 void StmtProfiler::VisitCXXTypeidExpr(const CXXTypeidExpr *S) {
1086   VisitExpr(S);
1087   if (S->isTypeOperand())
1088     VisitType(S->getTypeOperandSourceInfo()->getType());
1089 }
1090 
1091 void StmtProfiler::VisitCXXUuidofExpr(const CXXUuidofExpr *S) {
1092   VisitExpr(S);
1093   if (S->isTypeOperand())
1094     VisitType(S->getTypeOperandSourceInfo()->getType());
1095 }
1096 
1097 void StmtProfiler::VisitMSPropertyRefExpr(const MSPropertyRefExpr *S) {
1098   VisitExpr(S);
1099   VisitDecl(S->getPropertyDecl());
1100 }
1101 
1102 void StmtProfiler::VisitCXXThisExpr(const CXXThisExpr *S) {
1103   VisitExpr(S);
1104   ID.AddBoolean(S->isImplicit());
1105 }
1106 
1107 void StmtProfiler::VisitCXXThrowExpr(const CXXThrowExpr *S) {
1108   VisitExpr(S);
1109 }
1110 
1111 void StmtProfiler::VisitCXXDefaultArgExpr(const CXXDefaultArgExpr *S) {
1112   VisitExpr(S);
1113   VisitDecl(S->getParam());
1114 }
1115 
1116 void StmtProfiler::VisitCXXDefaultInitExpr(const CXXDefaultInitExpr *S) {
1117   VisitExpr(S);
1118   VisitDecl(S->getField());
1119 }
1120 
1121 void StmtProfiler::VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *S) {
1122   VisitExpr(S);
1123   VisitDecl(
1124          const_cast<CXXDestructorDecl *>(S->getTemporary()->getDestructor()));
1125 }
1126 
1127 void StmtProfiler::VisitCXXConstructExpr(const CXXConstructExpr *S) {
1128   VisitExpr(S);
1129   VisitDecl(S->getConstructor());
1130   ID.AddBoolean(S->isElidable());
1131 }
1132 
1133 void StmtProfiler::VisitCXXFunctionalCastExpr(const CXXFunctionalCastExpr *S) {
1134   VisitExplicitCastExpr(S);
1135 }
1136 
1137 void
1138 StmtProfiler::VisitCXXTemporaryObjectExpr(const CXXTemporaryObjectExpr *S) {
1139   VisitCXXConstructExpr(S);
1140 }
1141 
1142 void
1143 StmtProfiler::VisitLambdaExpr(const LambdaExpr *S) {
1144   VisitExpr(S);
1145   for (LambdaExpr::capture_iterator C = S->explicit_capture_begin(),
1146                                  CEnd = S->explicit_capture_end();
1147        C != CEnd; ++C) {
1148     ID.AddInteger(C->getCaptureKind());
1149     switch (C->getCaptureKind()) {
1150     case LCK_This:
1151       break;
1152     case LCK_ByRef:
1153     case LCK_ByCopy:
1154       VisitDecl(C->getCapturedVar());
1155       ID.AddBoolean(C->isPackExpansion());
1156       break;
1157     case LCK_VLAType:
1158       llvm_unreachable("VLA type in explicit captures.");
1159     }
1160   }
1161   // Note: If we actually needed to be able to match lambda
1162   // expressions, we would have to consider parameters and return type
1163   // here, among other things.
1164   VisitStmt(S->getBody());
1165 }
1166 
1167 void
1168 StmtProfiler::VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *S) {
1169   VisitExpr(S);
1170 }
1171 
1172 void StmtProfiler::VisitCXXDeleteExpr(const CXXDeleteExpr *S) {
1173   VisitExpr(S);
1174   ID.AddBoolean(S->isGlobalDelete());
1175   ID.AddBoolean(S->isArrayForm());
1176   VisitDecl(S->getOperatorDelete());
1177 }
1178 
1179 
1180 void StmtProfiler::VisitCXXNewExpr(const CXXNewExpr *S) {
1181   VisitExpr(S);
1182   VisitType(S->getAllocatedType());
1183   VisitDecl(S->getOperatorNew());
1184   VisitDecl(S->getOperatorDelete());
1185   ID.AddBoolean(S->isArray());
1186   ID.AddInteger(S->getNumPlacementArgs());
1187   ID.AddBoolean(S->isGlobalNew());
1188   ID.AddBoolean(S->isParenTypeId());
1189   ID.AddInteger(S->getInitializationStyle());
1190 }
1191 
1192 void
1193 StmtProfiler::VisitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *S) {
1194   VisitExpr(S);
1195   ID.AddBoolean(S->isArrow());
1196   VisitNestedNameSpecifier(S->getQualifier());
1197   ID.AddBoolean(S->getScopeTypeInfo() != nullptr);
1198   if (S->getScopeTypeInfo())
1199     VisitType(S->getScopeTypeInfo()->getType());
1200   ID.AddBoolean(S->getDestroyedTypeInfo() != nullptr);
1201   if (S->getDestroyedTypeInfo())
1202     VisitType(S->getDestroyedType());
1203   else
1204     ID.AddPointer(S->getDestroyedTypeIdentifier());
1205 }
1206 
1207 void StmtProfiler::VisitOverloadExpr(const OverloadExpr *S) {
1208   VisitExpr(S);
1209   VisitNestedNameSpecifier(S->getQualifier());
1210   VisitName(S->getName());
1211   ID.AddBoolean(S->hasExplicitTemplateArgs());
1212   if (S->hasExplicitTemplateArgs())
1213     VisitTemplateArguments(S->getExplicitTemplateArgs().getTemplateArgs(),
1214                            S->getExplicitTemplateArgs().NumTemplateArgs);
1215 }
1216 
1217 void
1218 StmtProfiler::VisitUnresolvedLookupExpr(const UnresolvedLookupExpr *S) {
1219   VisitOverloadExpr(S);
1220 }
1221 
1222 void StmtProfiler::VisitTypeTraitExpr(const TypeTraitExpr *S) {
1223   VisitExpr(S);
1224   ID.AddInteger(S->getTrait());
1225   ID.AddInteger(S->getNumArgs());
1226   for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
1227     VisitType(S->getArg(I)->getType());
1228 }
1229 
1230 void StmtProfiler::VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *S) {
1231   VisitExpr(S);
1232   ID.AddInteger(S->getTrait());
1233   VisitType(S->getQueriedType());
1234 }
1235 
1236 void StmtProfiler::VisitExpressionTraitExpr(const ExpressionTraitExpr *S) {
1237   VisitExpr(S);
1238   ID.AddInteger(S->getTrait());
1239   VisitExpr(S->getQueriedExpression());
1240 }
1241 
1242 void StmtProfiler::VisitDependentScopeDeclRefExpr(
1243     const DependentScopeDeclRefExpr *S) {
1244   VisitExpr(S);
1245   VisitName(S->getDeclName());
1246   VisitNestedNameSpecifier(S->getQualifier());
1247   ID.AddBoolean(S->hasExplicitTemplateArgs());
1248   if (S->hasExplicitTemplateArgs())
1249     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1250 }
1251 
1252 void StmtProfiler::VisitExprWithCleanups(const ExprWithCleanups *S) {
1253   VisitExpr(S);
1254 }
1255 
1256 void StmtProfiler::VisitCXXUnresolvedConstructExpr(
1257     const CXXUnresolvedConstructExpr *S) {
1258   VisitExpr(S);
1259   VisitType(S->getTypeAsWritten());
1260 }
1261 
1262 void StmtProfiler::VisitCXXDependentScopeMemberExpr(
1263     const CXXDependentScopeMemberExpr *S) {
1264   ID.AddBoolean(S->isImplicitAccess());
1265   if (!S->isImplicitAccess()) {
1266     VisitExpr(S);
1267     ID.AddBoolean(S->isArrow());
1268   }
1269   VisitNestedNameSpecifier(S->getQualifier());
1270   VisitName(S->getMember());
1271   ID.AddBoolean(S->hasExplicitTemplateArgs());
1272   if (S->hasExplicitTemplateArgs())
1273     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1274 }
1275 
1276 void StmtProfiler::VisitUnresolvedMemberExpr(const UnresolvedMemberExpr *S) {
1277   ID.AddBoolean(S->isImplicitAccess());
1278   if (!S->isImplicitAccess()) {
1279     VisitExpr(S);
1280     ID.AddBoolean(S->isArrow());
1281   }
1282   VisitNestedNameSpecifier(S->getQualifier());
1283   VisitName(S->getMemberName());
1284   ID.AddBoolean(S->hasExplicitTemplateArgs());
1285   if (S->hasExplicitTemplateArgs())
1286     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1287 }
1288 
1289 void StmtProfiler::VisitCXXNoexceptExpr(const CXXNoexceptExpr *S) {
1290   VisitExpr(S);
1291 }
1292 
1293 void StmtProfiler::VisitPackExpansionExpr(const PackExpansionExpr *S) {
1294   VisitExpr(S);
1295 }
1296 
1297 void StmtProfiler::VisitSizeOfPackExpr(const SizeOfPackExpr *S) {
1298   VisitExpr(S);
1299   VisitDecl(S->getPack());
1300 }
1301 
1302 void StmtProfiler::VisitSubstNonTypeTemplateParmPackExpr(
1303     const SubstNonTypeTemplateParmPackExpr *S) {
1304   VisitExpr(S);
1305   VisitDecl(S->getParameterPack());
1306   VisitTemplateArgument(S->getArgumentPack());
1307 }
1308 
1309 void StmtProfiler::VisitSubstNonTypeTemplateParmExpr(
1310     const SubstNonTypeTemplateParmExpr *E) {
1311   // Profile exactly as the replacement expression.
1312   Visit(E->getReplacement());
1313 }
1314 
1315 void StmtProfiler::VisitFunctionParmPackExpr(const FunctionParmPackExpr *S) {
1316   VisitExpr(S);
1317   VisitDecl(S->getParameterPack());
1318   ID.AddInteger(S->getNumExpansions());
1319   for (FunctionParmPackExpr::iterator I = S->begin(), E = S->end(); I != E; ++I)
1320     VisitDecl(*I);
1321 }
1322 
1323 void StmtProfiler::VisitMaterializeTemporaryExpr(
1324                                            const MaterializeTemporaryExpr *S) {
1325   VisitExpr(S);
1326 }
1327 
1328 void StmtProfiler::VisitCXXFoldExpr(const CXXFoldExpr *S) {
1329   VisitExpr(S);
1330   ID.AddInteger(S->getOperator());
1331 }
1332 
1333 void StmtProfiler::VisitOpaqueValueExpr(const OpaqueValueExpr *E) {
1334   VisitExpr(E);
1335 }
1336 
1337 void StmtProfiler::VisitTypoExpr(const TypoExpr *E) {
1338   VisitExpr(E);
1339 }
1340 
1341 void StmtProfiler::VisitObjCStringLiteral(const ObjCStringLiteral *S) {
1342   VisitExpr(S);
1343 }
1344 
1345 void StmtProfiler::VisitObjCBoxedExpr(const ObjCBoxedExpr *E) {
1346   VisitExpr(E);
1347 }
1348 
1349 void StmtProfiler::VisitObjCArrayLiteral(const ObjCArrayLiteral *E) {
1350   VisitExpr(E);
1351 }
1352 
1353 void StmtProfiler::VisitObjCDictionaryLiteral(const ObjCDictionaryLiteral *E) {
1354   VisitExpr(E);
1355 }
1356 
1357 void StmtProfiler::VisitObjCEncodeExpr(const ObjCEncodeExpr *S) {
1358   VisitExpr(S);
1359   VisitType(S->getEncodedType());
1360 }
1361 
1362 void StmtProfiler::VisitObjCSelectorExpr(const ObjCSelectorExpr *S) {
1363   VisitExpr(S);
1364   VisitName(S->getSelector());
1365 }
1366 
1367 void StmtProfiler::VisitObjCProtocolExpr(const ObjCProtocolExpr *S) {
1368   VisitExpr(S);
1369   VisitDecl(S->getProtocol());
1370 }
1371 
1372 void StmtProfiler::VisitObjCIvarRefExpr(const ObjCIvarRefExpr *S) {
1373   VisitExpr(S);
1374   VisitDecl(S->getDecl());
1375   ID.AddBoolean(S->isArrow());
1376   ID.AddBoolean(S->isFreeIvar());
1377 }
1378 
1379 void StmtProfiler::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *S) {
1380   VisitExpr(S);
1381   if (S->isImplicitProperty()) {
1382     VisitDecl(S->getImplicitPropertyGetter());
1383     VisitDecl(S->getImplicitPropertySetter());
1384   } else {
1385     VisitDecl(S->getExplicitProperty());
1386   }
1387   if (S->isSuperReceiver()) {
1388     ID.AddBoolean(S->isSuperReceiver());
1389     VisitType(S->getSuperReceiverType());
1390   }
1391 }
1392 
1393 void StmtProfiler::VisitObjCSubscriptRefExpr(const ObjCSubscriptRefExpr *S) {
1394   VisitExpr(S);
1395   VisitDecl(S->getAtIndexMethodDecl());
1396   VisitDecl(S->setAtIndexMethodDecl());
1397 }
1398 
1399 void StmtProfiler::VisitObjCMessageExpr(const ObjCMessageExpr *S) {
1400   VisitExpr(S);
1401   VisitName(S->getSelector());
1402   VisitDecl(S->getMethodDecl());
1403 }
1404 
1405 void StmtProfiler::VisitObjCIsaExpr(const ObjCIsaExpr *S) {
1406   VisitExpr(S);
1407   ID.AddBoolean(S->isArrow());
1408 }
1409 
1410 void StmtProfiler::VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *S) {
1411   VisitExpr(S);
1412   ID.AddBoolean(S->getValue());
1413 }
1414 
1415 void StmtProfiler::VisitObjCIndirectCopyRestoreExpr(
1416     const ObjCIndirectCopyRestoreExpr *S) {
1417   VisitExpr(S);
1418   ID.AddBoolean(S->shouldCopy());
1419 }
1420 
1421 void StmtProfiler::VisitObjCBridgedCastExpr(const ObjCBridgedCastExpr *S) {
1422   VisitExplicitCastExpr(S);
1423   ID.AddBoolean(S->getBridgeKind());
1424 }
1425 
1426 void StmtProfiler::VisitDecl(const Decl *D) {
1427   ID.AddInteger(D? D->getKind() : 0);
1428 
1429   if (Canonical && D) {
1430     if (const NonTypeTemplateParmDecl *NTTP =
1431           dyn_cast<NonTypeTemplateParmDecl>(D)) {
1432       ID.AddInteger(NTTP->getDepth());
1433       ID.AddInteger(NTTP->getIndex());
1434       ID.AddBoolean(NTTP->isParameterPack());
1435       VisitType(NTTP->getType());
1436       return;
1437     }
1438 
1439     if (const ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D)) {
1440       // The Itanium C++ ABI uses the type, scope depth, and scope
1441       // index of a parameter when mangling expressions that involve
1442       // function parameters, so we will use the parameter's type for
1443       // establishing function parameter identity. That way, our
1444       // definition of "equivalent" (per C++ [temp.over.link]) is at
1445       // least as strong as the definition of "equivalent" used for
1446       // name mangling.
1447       VisitType(Parm->getType());
1448       ID.AddInteger(Parm->getFunctionScopeDepth());
1449       ID.AddInteger(Parm->getFunctionScopeIndex());
1450       return;
1451     }
1452 
1453     if (const TemplateTypeParmDecl *TTP =
1454           dyn_cast<TemplateTypeParmDecl>(D)) {
1455       ID.AddInteger(TTP->getDepth());
1456       ID.AddInteger(TTP->getIndex());
1457       ID.AddBoolean(TTP->isParameterPack());
1458       return;
1459     }
1460 
1461     if (const TemplateTemplateParmDecl *TTP =
1462           dyn_cast<TemplateTemplateParmDecl>(D)) {
1463       ID.AddInteger(TTP->getDepth());
1464       ID.AddInteger(TTP->getIndex());
1465       ID.AddBoolean(TTP->isParameterPack());
1466       return;
1467     }
1468   }
1469 
1470   ID.AddPointer(D? D->getCanonicalDecl() : nullptr);
1471 }
1472 
1473 void StmtProfiler::VisitType(QualType T) {
1474   if (Canonical)
1475     T = Context.getCanonicalType(T);
1476 
1477   ID.AddPointer(T.getAsOpaquePtr());
1478 }
1479 
1480 void StmtProfiler::VisitName(DeclarationName Name) {
1481   ID.AddPointer(Name.getAsOpaquePtr());
1482 }
1483 
1484 void StmtProfiler::VisitNestedNameSpecifier(NestedNameSpecifier *NNS) {
1485   if (Canonical)
1486     NNS = Context.getCanonicalNestedNameSpecifier(NNS);
1487   ID.AddPointer(NNS);
1488 }
1489 
1490 void StmtProfiler::VisitTemplateName(TemplateName Name) {
1491   if (Canonical)
1492     Name = Context.getCanonicalTemplateName(Name);
1493 
1494   Name.Profile(ID);
1495 }
1496 
1497 void StmtProfiler::VisitTemplateArguments(const TemplateArgumentLoc *Args,
1498                                           unsigned NumArgs) {
1499   ID.AddInteger(NumArgs);
1500   for (unsigned I = 0; I != NumArgs; ++I)
1501     VisitTemplateArgument(Args[I].getArgument());
1502 }
1503 
1504 void StmtProfiler::VisitTemplateArgument(const TemplateArgument &Arg) {
1505   // Mostly repetitive with TemplateArgument::Profile!
1506   ID.AddInteger(Arg.getKind());
1507   switch (Arg.getKind()) {
1508   case TemplateArgument::Null:
1509     break;
1510 
1511   case TemplateArgument::Type:
1512     VisitType(Arg.getAsType());
1513     break;
1514 
1515   case TemplateArgument::Template:
1516   case TemplateArgument::TemplateExpansion:
1517     VisitTemplateName(Arg.getAsTemplateOrTemplatePattern());
1518     break;
1519 
1520   case TemplateArgument::Declaration:
1521     VisitDecl(Arg.getAsDecl());
1522     break;
1523 
1524   case TemplateArgument::NullPtr:
1525     VisitType(Arg.getNullPtrType());
1526     break;
1527 
1528   case TemplateArgument::Integral:
1529     Arg.getAsIntegral().Profile(ID);
1530     VisitType(Arg.getIntegralType());
1531     break;
1532 
1533   case TemplateArgument::Expression:
1534     Visit(Arg.getAsExpr());
1535     break;
1536 
1537   case TemplateArgument::Pack:
1538     for (const auto &P : Arg.pack_elements())
1539       VisitTemplateArgument(P);
1540     break;
1541   }
1542 }
1543 
1544 void Stmt::Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
1545                    bool Canonical) const {
1546   StmtProfiler Profiler(ID, Context, Canonical);
1547   Profiler.Visit(this);
1548 }
1549