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