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 // Seems that if VisitInitListExpr() only works on the syntactic form of an
748 // InitListExpr, then a DesignatedInitUpdateExpr is not encountered.
749 void StmtProfiler::VisitDesignatedInitUpdateExpr(
750     const DesignatedInitUpdateExpr *S) {
751   llvm_unreachable("Unexpected DesignatedInitUpdateExpr in syntactic form of "
752                    "initializer");
753 }
754 
755 void StmtProfiler::VisitNoInitExpr(const NoInitExpr *S) {
756   llvm_unreachable("Unexpected NoInitExpr in syntactic form of initializer");
757 }
758 
759 void StmtProfiler::VisitImplicitValueInitExpr(const ImplicitValueInitExpr *S) {
760   VisitExpr(S);
761 }
762 
763 void StmtProfiler::VisitExtVectorElementExpr(const ExtVectorElementExpr *S) {
764   VisitExpr(S);
765   VisitName(&S->getAccessor());
766 }
767 
768 void StmtProfiler::VisitBlockExpr(const BlockExpr *S) {
769   VisitExpr(S);
770   VisitDecl(S->getBlockDecl());
771 }
772 
773 void StmtProfiler::VisitGenericSelectionExpr(const GenericSelectionExpr *S) {
774   VisitExpr(S);
775   for (unsigned i = 0; i != S->getNumAssocs(); ++i) {
776     QualType T = S->getAssocType(i);
777     if (T.isNull())
778       ID.AddPointer(nullptr);
779     else
780       VisitType(T);
781     VisitExpr(S->getAssocExpr(i));
782   }
783 }
784 
785 void StmtProfiler::VisitPseudoObjectExpr(const PseudoObjectExpr *S) {
786   VisitExpr(S);
787   for (PseudoObjectExpr::const_semantics_iterator
788          i = S->semantics_begin(), e = S->semantics_end(); i != e; ++i)
789     // Normally, we would not profile the source expressions of OVEs.
790     if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(*i))
791       Visit(OVE->getSourceExpr());
792 }
793 
794 void StmtProfiler::VisitAtomicExpr(const AtomicExpr *S) {
795   VisitExpr(S);
796   ID.AddInteger(S->getOp());
797 }
798 
799 static Stmt::StmtClass DecodeOperatorCall(const CXXOperatorCallExpr *S,
800                                           UnaryOperatorKind &UnaryOp,
801                                           BinaryOperatorKind &BinaryOp) {
802   switch (S->getOperator()) {
803   case OO_None:
804   case OO_New:
805   case OO_Delete:
806   case OO_Array_New:
807   case OO_Array_Delete:
808   case OO_Arrow:
809   case OO_Call:
810   case OO_Conditional:
811   case NUM_OVERLOADED_OPERATORS:
812     llvm_unreachable("Invalid operator call kind");
813 
814   case OO_Plus:
815     if (S->getNumArgs() == 1) {
816       UnaryOp = UO_Plus;
817       return Stmt::UnaryOperatorClass;
818     }
819 
820     BinaryOp = BO_Add;
821     return Stmt::BinaryOperatorClass;
822 
823   case OO_Minus:
824     if (S->getNumArgs() == 1) {
825       UnaryOp = UO_Minus;
826       return Stmt::UnaryOperatorClass;
827     }
828 
829     BinaryOp = BO_Sub;
830     return Stmt::BinaryOperatorClass;
831 
832   case OO_Star:
833     if (S->getNumArgs() == 1) {
834       UnaryOp = UO_Deref;
835       return Stmt::UnaryOperatorClass;
836     }
837 
838     BinaryOp = BO_Mul;
839     return Stmt::BinaryOperatorClass;
840 
841   case OO_Slash:
842     BinaryOp = BO_Div;
843     return Stmt::BinaryOperatorClass;
844 
845   case OO_Percent:
846     BinaryOp = BO_Rem;
847     return Stmt::BinaryOperatorClass;
848 
849   case OO_Caret:
850     BinaryOp = BO_Xor;
851     return Stmt::BinaryOperatorClass;
852 
853   case OO_Amp:
854     if (S->getNumArgs() == 1) {
855       UnaryOp = UO_AddrOf;
856       return Stmt::UnaryOperatorClass;
857     }
858 
859     BinaryOp = BO_And;
860     return Stmt::BinaryOperatorClass;
861 
862   case OO_Pipe:
863     BinaryOp = BO_Or;
864     return Stmt::BinaryOperatorClass;
865 
866   case OO_Tilde:
867     UnaryOp = UO_Not;
868     return Stmt::UnaryOperatorClass;
869 
870   case OO_Exclaim:
871     UnaryOp = UO_LNot;
872     return Stmt::UnaryOperatorClass;
873 
874   case OO_Equal:
875     BinaryOp = BO_Assign;
876     return Stmt::BinaryOperatorClass;
877 
878   case OO_Less:
879     BinaryOp = BO_LT;
880     return Stmt::BinaryOperatorClass;
881 
882   case OO_Greater:
883     BinaryOp = BO_GT;
884     return Stmt::BinaryOperatorClass;
885 
886   case OO_PlusEqual:
887     BinaryOp = BO_AddAssign;
888     return Stmt::CompoundAssignOperatorClass;
889 
890   case OO_MinusEqual:
891     BinaryOp = BO_SubAssign;
892     return Stmt::CompoundAssignOperatorClass;
893 
894   case OO_StarEqual:
895     BinaryOp = BO_MulAssign;
896     return Stmt::CompoundAssignOperatorClass;
897 
898   case OO_SlashEqual:
899     BinaryOp = BO_DivAssign;
900     return Stmt::CompoundAssignOperatorClass;
901 
902   case OO_PercentEqual:
903     BinaryOp = BO_RemAssign;
904     return Stmt::CompoundAssignOperatorClass;
905 
906   case OO_CaretEqual:
907     BinaryOp = BO_XorAssign;
908     return Stmt::CompoundAssignOperatorClass;
909 
910   case OO_AmpEqual:
911     BinaryOp = BO_AndAssign;
912     return Stmt::CompoundAssignOperatorClass;
913 
914   case OO_PipeEqual:
915     BinaryOp = BO_OrAssign;
916     return Stmt::CompoundAssignOperatorClass;
917 
918   case OO_LessLess:
919     BinaryOp = BO_Shl;
920     return Stmt::BinaryOperatorClass;
921 
922   case OO_GreaterGreater:
923     BinaryOp = BO_Shr;
924     return Stmt::BinaryOperatorClass;
925 
926   case OO_LessLessEqual:
927     BinaryOp = BO_ShlAssign;
928     return Stmt::CompoundAssignOperatorClass;
929 
930   case OO_GreaterGreaterEqual:
931     BinaryOp = BO_ShrAssign;
932     return Stmt::CompoundAssignOperatorClass;
933 
934   case OO_EqualEqual:
935     BinaryOp = BO_EQ;
936     return Stmt::BinaryOperatorClass;
937 
938   case OO_ExclaimEqual:
939     BinaryOp = BO_NE;
940     return Stmt::BinaryOperatorClass;
941 
942   case OO_LessEqual:
943     BinaryOp = BO_LE;
944     return Stmt::BinaryOperatorClass;
945 
946   case OO_GreaterEqual:
947     BinaryOp = BO_GE;
948     return Stmt::BinaryOperatorClass;
949 
950   case OO_AmpAmp:
951     BinaryOp = BO_LAnd;
952     return Stmt::BinaryOperatorClass;
953 
954   case OO_PipePipe:
955     BinaryOp = BO_LOr;
956     return Stmt::BinaryOperatorClass;
957 
958   case OO_PlusPlus:
959     UnaryOp = S->getNumArgs() == 1? UO_PreInc
960                                   : UO_PostInc;
961     return Stmt::UnaryOperatorClass;
962 
963   case OO_MinusMinus:
964     UnaryOp = S->getNumArgs() == 1? UO_PreDec
965                                   : UO_PostDec;
966     return Stmt::UnaryOperatorClass;
967 
968   case OO_Comma:
969     BinaryOp = BO_Comma;
970     return Stmt::BinaryOperatorClass;
971 
972 
973   case OO_ArrowStar:
974     BinaryOp = BO_PtrMemI;
975     return Stmt::BinaryOperatorClass;
976 
977   case OO_Subscript:
978     return Stmt::ArraySubscriptExprClass;
979   }
980 
981   llvm_unreachable("Invalid overloaded operator expression");
982 }
983 
984 
985 void StmtProfiler::VisitCXXOperatorCallExpr(const CXXOperatorCallExpr *S) {
986   if (S->isTypeDependent()) {
987     // Type-dependent operator calls are profiled like their underlying
988     // syntactic operator.
989     UnaryOperatorKind UnaryOp = UO_Extension;
990     BinaryOperatorKind BinaryOp = BO_Comma;
991     Stmt::StmtClass SC = DecodeOperatorCall(S, UnaryOp, BinaryOp);
992 
993     ID.AddInteger(SC);
994     for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
995       Visit(S->getArg(I));
996     if (SC == Stmt::UnaryOperatorClass)
997       ID.AddInteger(UnaryOp);
998     else if (SC == Stmt::BinaryOperatorClass ||
999              SC == Stmt::CompoundAssignOperatorClass)
1000       ID.AddInteger(BinaryOp);
1001     else
1002       assert(SC == Stmt::ArraySubscriptExprClass);
1003 
1004     return;
1005   }
1006 
1007   VisitCallExpr(S);
1008   ID.AddInteger(S->getOperator());
1009 }
1010 
1011 void StmtProfiler::VisitCXXMemberCallExpr(const CXXMemberCallExpr *S) {
1012   VisitCallExpr(S);
1013 }
1014 
1015 void StmtProfiler::VisitCUDAKernelCallExpr(const CUDAKernelCallExpr *S) {
1016   VisitCallExpr(S);
1017 }
1018 
1019 void StmtProfiler::VisitAsTypeExpr(const AsTypeExpr *S) {
1020   VisitExpr(S);
1021 }
1022 
1023 void StmtProfiler::VisitCXXNamedCastExpr(const CXXNamedCastExpr *S) {
1024   VisitExplicitCastExpr(S);
1025 }
1026 
1027 void StmtProfiler::VisitCXXStaticCastExpr(const CXXStaticCastExpr *S) {
1028   VisitCXXNamedCastExpr(S);
1029 }
1030 
1031 void StmtProfiler::VisitCXXDynamicCastExpr(const CXXDynamicCastExpr *S) {
1032   VisitCXXNamedCastExpr(S);
1033 }
1034 
1035 void
1036 StmtProfiler::VisitCXXReinterpretCastExpr(const CXXReinterpretCastExpr *S) {
1037   VisitCXXNamedCastExpr(S);
1038 }
1039 
1040 void StmtProfiler::VisitCXXConstCastExpr(const CXXConstCastExpr *S) {
1041   VisitCXXNamedCastExpr(S);
1042 }
1043 
1044 void StmtProfiler::VisitUserDefinedLiteral(const UserDefinedLiteral *S) {
1045   VisitCallExpr(S);
1046 }
1047 
1048 void StmtProfiler::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *S) {
1049   VisitExpr(S);
1050   ID.AddBoolean(S->getValue());
1051 }
1052 
1053 void StmtProfiler::VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *S) {
1054   VisitExpr(S);
1055 }
1056 
1057 void StmtProfiler::VisitCXXStdInitializerListExpr(
1058     const CXXStdInitializerListExpr *S) {
1059   VisitExpr(S);
1060 }
1061 
1062 void StmtProfiler::VisitCXXTypeidExpr(const CXXTypeidExpr *S) {
1063   VisitExpr(S);
1064   if (S->isTypeOperand())
1065     VisitType(S->getTypeOperandSourceInfo()->getType());
1066 }
1067 
1068 void StmtProfiler::VisitCXXUuidofExpr(const CXXUuidofExpr *S) {
1069   VisitExpr(S);
1070   if (S->isTypeOperand())
1071     VisitType(S->getTypeOperandSourceInfo()->getType());
1072 }
1073 
1074 void StmtProfiler::VisitMSPropertyRefExpr(const MSPropertyRefExpr *S) {
1075   VisitExpr(S);
1076   VisitDecl(S->getPropertyDecl());
1077 }
1078 
1079 void StmtProfiler::VisitCXXThisExpr(const CXXThisExpr *S) {
1080   VisitExpr(S);
1081   ID.AddBoolean(S->isImplicit());
1082 }
1083 
1084 void StmtProfiler::VisitCXXThrowExpr(const CXXThrowExpr *S) {
1085   VisitExpr(S);
1086 }
1087 
1088 void StmtProfiler::VisitCXXDefaultArgExpr(const CXXDefaultArgExpr *S) {
1089   VisitExpr(S);
1090   VisitDecl(S->getParam());
1091 }
1092 
1093 void StmtProfiler::VisitCXXDefaultInitExpr(const CXXDefaultInitExpr *S) {
1094   VisitExpr(S);
1095   VisitDecl(S->getField());
1096 }
1097 
1098 void StmtProfiler::VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *S) {
1099   VisitExpr(S);
1100   VisitDecl(
1101          const_cast<CXXDestructorDecl *>(S->getTemporary()->getDestructor()));
1102 }
1103 
1104 void StmtProfiler::VisitCXXConstructExpr(const CXXConstructExpr *S) {
1105   VisitExpr(S);
1106   VisitDecl(S->getConstructor());
1107   ID.AddBoolean(S->isElidable());
1108 }
1109 
1110 void StmtProfiler::VisitCXXFunctionalCastExpr(const CXXFunctionalCastExpr *S) {
1111   VisitExplicitCastExpr(S);
1112 }
1113 
1114 void
1115 StmtProfiler::VisitCXXTemporaryObjectExpr(const CXXTemporaryObjectExpr *S) {
1116   VisitCXXConstructExpr(S);
1117 }
1118 
1119 void
1120 StmtProfiler::VisitLambdaExpr(const LambdaExpr *S) {
1121   VisitExpr(S);
1122   for (LambdaExpr::capture_iterator C = S->explicit_capture_begin(),
1123                                  CEnd = S->explicit_capture_end();
1124        C != CEnd; ++C) {
1125     ID.AddInteger(C->getCaptureKind());
1126     switch (C->getCaptureKind()) {
1127     case LCK_This:
1128       break;
1129     case LCK_ByRef:
1130     case LCK_ByCopy:
1131       VisitDecl(C->getCapturedVar());
1132       ID.AddBoolean(C->isPackExpansion());
1133       break;
1134     case LCK_VLAType:
1135       llvm_unreachable("VLA type in explicit captures.");
1136     }
1137   }
1138   // Note: If we actually needed to be able to match lambda
1139   // expressions, we would have to consider parameters and return type
1140   // here, among other things.
1141   VisitStmt(S->getBody());
1142 }
1143 
1144 void
1145 StmtProfiler::VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *S) {
1146   VisitExpr(S);
1147 }
1148 
1149 void StmtProfiler::VisitCXXDeleteExpr(const CXXDeleteExpr *S) {
1150   VisitExpr(S);
1151   ID.AddBoolean(S->isGlobalDelete());
1152   ID.AddBoolean(S->isArrayForm());
1153   VisitDecl(S->getOperatorDelete());
1154 }
1155 
1156 
1157 void StmtProfiler::VisitCXXNewExpr(const CXXNewExpr *S) {
1158   VisitExpr(S);
1159   VisitType(S->getAllocatedType());
1160   VisitDecl(S->getOperatorNew());
1161   VisitDecl(S->getOperatorDelete());
1162   ID.AddBoolean(S->isArray());
1163   ID.AddInteger(S->getNumPlacementArgs());
1164   ID.AddBoolean(S->isGlobalNew());
1165   ID.AddBoolean(S->isParenTypeId());
1166   ID.AddInteger(S->getInitializationStyle());
1167 }
1168 
1169 void
1170 StmtProfiler::VisitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *S) {
1171   VisitExpr(S);
1172   ID.AddBoolean(S->isArrow());
1173   VisitNestedNameSpecifier(S->getQualifier());
1174   ID.AddBoolean(S->getScopeTypeInfo() != nullptr);
1175   if (S->getScopeTypeInfo())
1176     VisitType(S->getScopeTypeInfo()->getType());
1177   ID.AddBoolean(S->getDestroyedTypeInfo() != nullptr);
1178   if (S->getDestroyedTypeInfo())
1179     VisitType(S->getDestroyedType());
1180   else
1181     ID.AddPointer(S->getDestroyedTypeIdentifier());
1182 }
1183 
1184 void StmtProfiler::VisitOverloadExpr(const OverloadExpr *S) {
1185   VisitExpr(S);
1186   VisitNestedNameSpecifier(S->getQualifier());
1187   VisitName(S->getName());
1188   ID.AddBoolean(S->hasExplicitTemplateArgs());
1189   if (S->hasExplicitTemplateArgs())
1190     VisitTemplateArguments(S->getExplicitTemplateArgs().getTemplateArgs(),
1191                            S->getExplicitTemplateArgs().NumTemplateArgs);
1192 }
1193 
1194 void
1195 StmtProfiler::VisitUnresolvedLookupExpr(const UnresolvedLookupExpr *S) {
1196   VisitOverloadExpr(S);
1197 }
1198 
1199 void StmtProfiler::VisitTypeTraitExpr(const TypeTraitExpr *S) {
1200   VisitExpr(S);
1201   ID.AddInteger(S->getTrait());
1202   ID.AddInteger(S->getNumArgs());
1203   for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
1204     VisitType(S->getArg(I)->getType());
1205 }
1206 
1207 void StmtProfiler::VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *S) {
1208   VisitExpr(S);
1209   ID.AddInteger(S->getTrait());
1210   VisitType(S->getQueriedType());
1211 }
1212 
1213 void StmtProfiler::VisitExpressionTraitExpr(const ExpressionTraitExpr *S) {
1214   VisitExpr(S);
1215   ID.AddInteger(S->getTrait());
1216   VisitExpr(S->getQueriedExpression());
1217 }
1218 
1219 void StmtProfiler::VisitDependentScopeDeclRefExpr(
1220     const DependentScopeDeclRefExpr *S) {
1221   VisitExpr(S);
1222   VisitName(S->getDeclName());
1223   VisitNestedNameSpecifier(S->getQualifier());
1224   ID.AddBoolean(S->hasExplicitTemplateArgs());
1225   if (S->hasExplicitTemplateArgs())
1226     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1227 }
1228 
1229 void StmtProfiler::VisitExprWithCleanups(const ExprWithCleanups *S) {
1230   VisitExpr(S);
1231 }
1232 
1233 void StmtProfiler::VisitCXXUnresolvedConstructExpr(
1234     const CXXUnresolvedConstructExpr *S) {
1235   VisitExpr(S);
1236   VisitType(S->getTypeAsWritten());
1237 }
1238 
1239 void StmtProfiler::VisitCXXDependentScopeMemberExpr(
1240     const CXXDependentScopeMemberExpr *S) {
1241   ID.AddBoolean(S->isImplicitAccess());
1242   if (!S->isImplicitAccess()) {
1243     VisitExpr(S);
1244     ID.AddBoolean(S->isArrow());
1245   }
1246   VisitNestedNameSpecifier(S->getQualifier());
1247   VisitName(S->getMember());
1248   ID.AddBoolean(S->hasExplicitTemplateArgs());
1249   if (S->hasExplicitTemplateArgs())
1250     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1251 }
1252 
1253 void StmtProfiler::VisitUnresolvedMemberExpr(const UnresolvedMemberExpr *S) {
1254   ID.AddBoolean(S->isImplicitAccess());
1255   if (!S->isImplicitAccess()) {
1256     VisitExpr(S);
1257     ID.AddBoolean(S->isArrow());
1258   }
1259   VisitNestedNameSpecifier(S->getQualifier());
1260   VisitName(S->getMemberName());
1261   ID.AddBoolean(S->hasExplicitTemplateArgs());
1262   if (S->hasExplicitTemplateArgs())
1263     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1264 }
1265 
1266 void StmtProfiler::VisitCXXNoexceptExpr(const CXXNoexceptExpr *S) {
1267   VisitExpr(S);
1268 }
1269 
1270 void StmtProfiler::VisitPackExpansionExpr(const PackExpansionExpr *S) {
1271   VisitExpr(S);
1272 }
1273 
1274 void StmtProfiler::VisitSizeOfPackExpr(const SizeOfPackExpr *S) {
1275   VisitExpr(S);
1276   VisitDecl(S->getPack());
1277 }
1278 
1279 void StmtProfiler::VisitSubstNonTypeTemplateParmPackExpr(
1280     const SubstNonTypeTemplateParmPackExpr *S) {
1281   VisitExpr(S);
1282   VisitDecl(S->getParameterPack());
1283   VisitTemplateArgument(S->getArgumentPack());
1284 }
1285 
1286 void StmtProfiler::VisitSubstNonTypeTemplateParmExpr(
1287     const SubstNonTypeTemplateParmExpr *E) {
1288   // Profile exactly as the replacement expression.
1289   Visit(E->getReplacement());
1290 }
1291 
1292 void StmtProfiler::VisitFunctionParmPackExpr(const FunctionParmPackExpr *S) {
1293   VisitExpr(S);
1294   VisitDecl(S->getParameterPack());
1295   ID.AddInteger(S->getNumExpansions());
1296   for (FunctionParmPackExpr::iterator I = S->begin(), E = S->end(); I != E; ++I)
1297     VisitDecl(*I);
1298 }
1299 
1300 void StmtProfiler::VisitMaterializeTemporaryExpr(
1301                                            const MaterializeTemporaryExpr *S) {
1302   VisitExpr(S);
1303 }
1304 
1305 void StmtProfiler::VisitCXXFoldExpr(const CXXFoldExpr *S) {
1306   VisitExpr(S);
1307   ID.AddInteger(S->getOperator());
1308 }
1309 
1310 void StmtProfiler::VisitOpaqueValueExpr(const OpaqueValueExpr *E) {
1311   VisitExpr(E);
1312 }
1313 
1314 void StmtProfiler::VisitTypoExpr(const TypoExpr *E) {
1315   VisitExpr(E);
1316 }
1317 
1318 void StmtProfiler::VisitObjCStringLiteral(const ObjCStringLiteral *S) {
1319   VisitExpr(S);
1320 }
1321 
1322 void StmtProfiler::VisitObjCBoxedExpr(const ObjCBoxedExpr *E) {
1323   VisitExpr(E);
1324 }
1325 
1326 void StmtProfiler::VisitObjCArrayLiteral(const ObjCArrayLiteral *E) {
1327   VisitExpr(E);
1328 }
1329 
1330 void StmtProfiler::VisitObjCDictionaryLiteral(const ObjCDictionaryLiteral *E) {
1331   VisitExpr(E);
1332 }
1333 
1334 void StmtProfiler::VisitObjCEncodeExpr(const ObjCEncodeExpr *S) {
1335   VisitExpr(S);
1336   VisitType(S->getEncodedType());
1337 }
1338 
1339 void StmtProfiler::VisitObjCSelectorExpr(const ObjCSelectorExpr *S) {
1340   VisitExpr(S);
1341   VisitName(S->getSelector());
1342 }
1343 
1344 void StmtProfiler::VisitObjCProtocolExpr(const ObjCProtocolExpr *S) {
1345   VisitExpr(S);
1346   VisitDecl(S->getProtocol());
1347 }
1348 
1349 void StmtProfiler::VisitObjCIvarRefExpr(const ObjCIvarRefExpr *S) {
1350   VisitExpr(S);
1351   VisitDecl(S->getDecl());
1352   ID.AddBoolean(S->isArrow());
1353   ID.AddBoolean(S->isFreeIvar());
1354 }
1355 
1356 void StmtProfiler::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *S) {
1357   VisitExpr(S);
1358   if (S->isImplicitProperty()) {
1359     VisitDecl(S->getImplicitPropertyGetter());
1360     VisitDecl(S->getImplicitPropertySetter());
1361   } else {
1362     VisitDecl(S->getExplicitProperty());
1363   }
1364   if (S->isSuperReceiver()) {
1365     ID.AddBoolean(S->isSuperReceiver());
1366     VisitType(S->getSuperReceiverType());
1367   }
1368 }
1369 
1370 void StmtProfiler::VisitObjCSubscriptRefExpr(const ObjCSubscriptRefExpr *S) {
1371   VisitExpr(S);
1372   VisitDecl(S->getAtIndexMethodDecl());
1373   VisitDecl(S->setAtIndexMethodDecl());
1374 }
1375 
1376 void StmtProfiler::VisitObjCMessageExpr(const ObjCMessageExpr *S) {
1377   VisitExpr(S);
1378   VisitName(S->getSelector());
1379   VisitDecl(S->getMethodDecl());
1380 }
1381 
1382 void StmtProfiler::VisitObjCIsaExpr(const ObjCIsaExpr *S) {
1383   VisitExpr(S);
1384   ID.AddBoolean(S->isArrow());
1385 }
1386 
1387 void StmtProfiler::VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *S) {
1388   VisitExpr(S);
1389   ID.AddBoolean(S->getValue());
1390 }
1391 
1392 void StmtProfiler::VisitObjCIndirectCopyRestoreExpr(
1393     const ObjCIndirectCopyRestoreExpr *S) {
1394   VisitExpr(S);
1395   ID.AddBoolean(S->shouldCopy());
1396 }
1397 
1398 void StmtProfiler::VisitObjCBridgedCastExpr(const ObjCBridgedCastExpr *S) {
1399   VisitExplicitCastExpr(S);
1400   ID.AddBoolean(S->getBridgeKind());
1401 }
1402 
1403 void StmtProfiler::VisitDecl(const Decl *D) {
1404   ID.AddInteger(D? D->getKind() : 0);
1405 
1406   if (Canonical && D) {
1407     if (const NonTypeTemplateParmDecl *NTTP =
1408           dyn_cast<NonTypeTemplateParmDecl>(D)) {
1409       ID.AddInteger(NTTP->getDepth());
1410       ID.AddInteger(NTTP->getIndex());
1411       ID.AddBoolean(NTTP->isParameterPack());
1412       VisitType(NTTP->getType());
1413       return;
1414     }
1415 
1416     if (const ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D)) {
1417       // The Itanium C++ ABI uses the type, scope depth, and scope
1418       // index of a parameter when mangling expressions that involve
1419       // function parameters, so we will use the parameter's type for
1420       // establishing function parameter identity. That way, our
1421       // definition of "equivalent" (per C++ [temp.over.link]) is at
1422       // least as strong as the definition of "equivalent" used for
1423       // name mangling.
1424       VisitType(Parm->getType());
1425       ID.AddInteger(Parm->getFunctionScopeDepth());
1426       ID.AddInteger(Parm->getFunctionScopeIndex());
1427       return;
1428     }
1429 
1430     if (const TemplateTypeParmDecl *TTP =
1431           dyn_cast<TemplateTypeParmDecl>(D)) {
1432       ID.AddInteger(TTP->getDepth());
1433       ID.AddInteger(TTP->getIndex());
1434       ID.AddBoolean(TTP->isParameterPack());
1435       return;
1436     }
1437 
1438     if (const TemplateTemplateParmDecl *TTP =
1439           dyn_cast<TemplateTemplateParmDecl>(D)) {
1440       ID.AddInteger(TTP->getDepth());
1441       ID.AddInteger(TTP->getIndex());
1442       ID.AddBoolean(TTP->isParameterPack());
1443       return;
1444     }
1445   }
1446 
1447   ID.AddPointer(D? D->getCanonicalDecl() : nullptr);
1448 }
1449 
1450 void StmtProfiler::VisitType(QualType T) {
1451   if (Canonical)
1452     T = Context.getCanonicalType(T);
1453 
1454   ID.AddPointer(T.getAsOpaquePtr());
1455 }
1456 
1457 void StmtProfiler::VisitName(DeclarationName Name) {
1458   ID.AddPointer(Name.getAsOpaquePtr());
1459 }
1460 
1461 void StmtProfiler::VisitNestedNameSpecifier(NestedNameSpecifier *NNS) {
1462   if (Canonical)
1463     NNS = Context.getCanonicalNestedNameSpecifier(NNS);
1464   ID.AddPointer(NNS);
1465 }
1466 
1467 void StmtProfiler::VisitTemplateName(TemplateName Name) {
1468   if (Canonical)
1469     Name = Context.getCanonicalTemplateName(Name);
1470 
1471   Name.Profile(ID);
1472 }
1473 
1474 void StmtProfiler::VisitTemplateArguments(const TemplateArgumentLoc *Args,
1475                                           unsigned NumArgs) {
1476   ID.AddInteger(NumArgs);
1477   for (unsigned I = 0; I != NumArgs; ++I)
1478     VisitTemplateArgument(Args[I].getArgument());
1479 }
1480 
1481 void StmtProfiler::VisitTemplateArgument(const TemplateArgument &Arg) {
1482   // Mostly repetitive with TemplateArgument::Profile!
1483   ID.AddInteger(Arg.getKind());
1484   switch (Arg.getKind()) {
1485   case TemplateArgument::Null:
1486     break;
1487 
1488   case TemplateArgument::Type:
1489     VisitType(Arg.getAsType());
1490     break;
1491 
1492   case TemplateArgument::Template:
1493   case TemplateArgument::TemplateExpansion:
1494     VisitTemplateName(Arg.getAsTemplateOrTemplatePattern());
1495     break;
1496 
1497   case TemplateArgument::Declaration:
1498     VisitDecl(Arg.getAsDecl());
1499     break;
1500 
1501   case TemplateArgument::NullPtr:
1502     VisitType(Arg.getNullPtrType());
1503     break;
1504 
1505   case TemplateArgument::Integral:
1506     Arg.getAsIntegral().Profile(ID);
1507     VisitType(Arg.getIntegralType());
1508     break;
1509 
1510   case TemplateArgument::Expression:
1511     Visit(Arg.getAsExpr());
1512     break;
1513 
1514   case TemplateArgument::Pack:
1515     for (const auto &P : Arg.pack_elements())
1516       VisitTemplateArgument(P);
1517     break;
1518   }
1519 }
1520 
1521 void Stmt::Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
1522                    bool Canonical) const {
1523   StmtProfiler Profiler(ID, Context, Canonical);
1524   Profiler.Visit(this);
1525 }
1526