1 //===---- StmtProfile.cpp - Profile implementation for Stmt ASTs ----------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the Stmt::Profile method, which builds a unique bit
11 // representation that identifies a statement/expression.
12 //
13 //===----------------------------------------------------------------------===//
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/DeclCXX.h"
16 #include "clang/AST/DeclObjC.h"
17 #include "clang/AST/DeclTemplate.h"
18 #include "clang/AST/Expr.h"
19 #include "clang/AST/ExprCXX.h"
20 #include "clang/AST/ExprObjC.h"
21 #include "clang/AST/StmtVisitor.h"
22 #include "llvm/ADT/FoldingSet.h"
23 using namespace clang;
24 
25 namespace {
26   class StmtProfiler : public ConstStmtVisitor<StmtProfiler> {
27     llvm::FoldingSetNodeID &ID;
28     const ASTContext &Context;
29     bool Canonical;
30 
31   public:
32     StmtProfiler(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
33                  bool Canonical)
34       : ID(ID), Context(Context), Canonical(Canonical) { }
35 
36     void VisitStmt(const Stmt *S);
37 
38 #define STMT(Node, Base) void Visit##Node(const Node *S);
39 #include "clang/AST/StmtNodes.inc"
40 
41     /// \brief Visit a declaration that is referenced within an expression
42     /// or statement.
43     void VisitDecl(const Decl *D);
44 
45     /// \brief Visit a type that is referenced within an expression or
46     /// statement.
47     void VisitType(QualType T);
48 
49     /// \brief Visit a name that occurs within an expression or statement.
50     void VisitName(DeclarationName Name);
51 
52     /// \brief Visit a nested-name-specifier that occurs within an expression
53     /// or statement.
54     void VisitNestedNameSpecifier(NestedNameSpecifier *NNS);
55 
56     /// \brief Visit a template name that occurs within an expression or
57     /// statement.
58     void VisitTemplateName(TemplateName Name);
59 
60     /// \brief Visit template arguments that occur within an expression or
61     /// statement.
62     void VisitTemplateArguments(const TemplateArgumentLoc *Args,
63                                 unsigned NumArgs);
64 
65     /// \brief Visit a single template argument.
66     void VisitTemplateArgument(const TemplateArgument &Arg);
67   };
68 }
69 
70 void StmtProfiler::VisitStmt(const Stmt *S) {
71   ID.AddInteger(S->getStmtClass());
72   for (Stmt::const_child_range C = S->children(); C; ++C) {
73     if (*C)
74       Visit(*C);
75     else
76       ID.AddInteger(0);
77   }
78 }
79 
80 void StmtProfiler::VisitDeclStmt(const DeclStmt *S) {
81   VisitStmt(S);
82   for (const auto *D : S->decls())
83     VisitDecl(D);
84 }
85 
86 void StmtProfiler::VisitNullStmt(const NullStmt *S) {
87   VisitStmt(S);
88 }
89 
90 void StmtProfiler::VisitCompoundStmt(const CompoundStmt *S) {
91   VisitStmt(S);
92 }
93 
94 void StmtProfiler::VisitSwitchCase(const SwitchCase *S) {
95   VisitStmt(S);
96 }
97 
98 void StmtProfiler::VisitCaseStmt(const CaseStmt *S) {
99   VisitStmt(S);
100 }
101 
102 void StmtProfiler::VisitDefaultStmt(const DefaultStmt *S) {
103   VisitStmt(S);
104 }
105 
106 void StmtProfiler::VisitLabelStmt(const LabelStmt *S) {
107   VisitStmt(S);
108   VisitDecl(S->getDecl());
109 }
110 
111 void StmtProfiler::VisitAttributedStmt(const AttributedStmt *S) {
112   VisitStmt(S);
113   // TODO: maybe visit attributes?
114 }
115 
116 void StmtProfiler::VisitIfStmt(const IfStmt *S) {
117   VisitStmt(S);
118   VisitDecl(S->getConditionVariable());
119 }
120 
121 void StmtProfiler::VisitSwitchStmt(const SwitchStmt *S) {
122   VisitStmt(S);
123   VisitDecl(S->getConditionVariable());
124 }
125 
126 void StmtProfiler::VisitWhileStmt(const WhileStmt *S) {
127   VisitStmt(S);
128   VisitDecl(S->getConditionVariable());
129 }
130 
131 void StmtProfiler::VisitDoStmt(const DoStmt *S) {
132   VisitStmt(S);
133 }
134 
135 void StmtProfiler::VisitForStmt(const ForStmt *S) {
136   VisitStmt(S);
137 }
138 
139 void StmtProfiler::VisitGotoStmt(const GotoStmt *S) {
140   VisitStmt(S);
141   VisitDecl(S->getLabel());
142 }
143 
144 void StmtProfiler::VisitIndirectGotoStmt(const IndirectGotoStmt *S) {
145   VisitStmt(S);
146 }
147 
148 void StmtProfiler::VisitContinueStmt(const ContinueStmt *S) {
149   VisitStmt(S);
150 }
151 
152 void StmtProfiler::VisitBreakStmt(const BreakStmt *S) {
153   VisitStmt(S);
154 }
155 
156 void StmtProfiler::VisitReturnStmt(const ReturnStmt *S) {
157   VisitStmt(S);
158 }
159 
160 void StmtProfiler::VisitGCCAsmStmt(const GCCAsmStmt *S) {
161   VisitStmt(S);
162   ID.AddBoolean(S->isVolatile());
163   ID.AddBoolean(S->isSimple());
164   VisitStringLiteral(S->getAsmString());
165   ID.AddInteger(S->getNumOutputs());
166   for (unsigned I = 0, N = S->getNumOutputs(); I != N; ++I) {
167     ID.AddString(S->getOutputName(I));
168     VisitStringLiteral(S->getOutputConstraintLiteral(I));
169   }
170   ID.AddInteger(S->getNumInputs());
171   for (unsigned I = 0, N = S->getNumInputs(); I != N; ++I) {
172     ID.AddString(S->getInputName(I));
173     VisitStringLiteral(S->getInputConstraintLiteral(I));
174   }
175   ID.AddInteger(S->getNumClobbers());
176   for (unsigned I = 0, N = S->getNumClobbers(); I != N; ++I)
177     VisitStringLiteral(S->getClobberStringLiteral(I));
178 }
179 
180 void StmtProfiler::VisitMSAsmStmt(const MSAsmStmt *S) {
181   // FIXME: Implement MS style inline asm statement profiler.
182   VisitStmt(S);
183 }
184 
185 void StmtProfiler::VisitCXXCatchStmt(const CXXCatchStmt *S) {
186   VisitStmt(S);
187   VisitType(S->getCaughtType());
188 }
189 
190 void StmtProfiler::VisitCXXTryStmt(const CXXTryStmt *S) {
191   VisitStmt(S);
192 }
193 
194 void StmtProfiler::VisitCXXForRangeStmt(const CXXForRangeStmt *S) {
195   VisitStmt(S);
196 }
197 
198 void StmtProfiler::VisitMSDependentExistsStmt(const MSDependentExistsStmt *S) {
199   VisitStmt(S);
200   ID.AddBoolean(S->isIfExists());
201   VisitNestedNameSpecifier(S->getQualifierLoc().getNestedNameSpecifier());
202   VisitName(S->getNameInfo().getName());
203 }
204 
205 void StmtProfiler::VisitSEHTryStmt(const SEHTryStmt *S) {
206   VisitStmt(S);
207 }
208 
209 void StmtProfiler::VisitSEHFinallyStmt(const SEHFinallyStmt *S) {
210   VisitStmt(S);
211 }
212 
213 void StmtProfiler::VisitSEHExceptStmt(const SEHExceptStmt *S) {
214   VisitStmt(S);
215 }
216 
217 void StmtProfiler::VisitSEHLeaveStmt(const SEHLeaveStmt *S) {
218   VisitStmt(S);
219 }
220 
221 void StmtProfiler::VisitCapturedStmt(const CapturedStmt *S) {
222   VisitStmt(S);
223 }
224 
225 void StmtProfiler::VisitObjCForCollectionStmt(const ObjCForCollectionStmt *S) {
226   VisitStmt(S);
227 }
228 
229 void StmtProfiler::VisitObjCAtCatchStmt(const ObjCAtCatchStmt *S) {
230   VisitStmt(S);
231   ID.AddBoolean(S->hasEllipsis());
232   if (S->getCatchParamDecl())
233     VisitType(S->getCatchParamDecl()->getType());
234 }
235 
236 void StmtProfiler::VisitObjCAtFinallyStmt(const ObjCAtFinallyStmt *S) {
237   VisitStmt(S);
238 }
239 
240 void StmtProfiler::VisitObjCAtTryStmt(const ObjCAtTryStmt *S) {
241   VisitStmt(S);
242 }
243 
244 void
245 StmtProfiler::VisitObjCAtSynchronizedStmt(const ObjCAtSynchronizedStmt *S) {
246   VisitStmt(S);
247 }
248 
249 void StmtProfiler::VisitObjCAtThrowStmt(const ObjCAtThrowStmt *S) {
250   VisitStmt(S);
251 }
252 
253 void
254 StmtProfiler::VisitObjCAutoreleasePoolStmt(const ObjCAutoreleasePoolStmt *S) {
255   VisitStmt(S);
256 }
257 
258 namespace {
259 class OMPClauseProfiler : public ConstOMPClauseVisitor<OMPClauseProfiler> {
260   StmtProfiler *Profiler;
261   /// \brief Process clauses with list of variables.
262   template <typename T>
263   void VisitOMPClauseList(T *Node);
264 public:
265   OMPClauseProfiler(StmtProfiler *P) : Profiler(P) { }
266 #define OPENMP_CLAUSE(Name, Class)                                             \
267   void Visit##Class(const Class *C);
268 #include "clang/Basic/OpenMPKinds.def"
269 };
270 
271 void OMPClauseProfiler::VisitOMPIfClause(const OMPIfClause *C) {
272   if (C->getCondition())
273     Profiler->VisitStmt(C->getCondition());
274 }
275 
276 void OMPClauseProfiler::VisitOMPFinalClause(const OMPFinalClause *C) {
277   if (C->getCondition())
278     Profiler->VisitStmt(C->getCondition());
279 }
280 
281 void OMPClauseProfiler::VisitOMPNumThreadsClause(const OMPNumThreadsClause *C) {
282   if (C->getNumThreads())
283     Profiler->VisitStmt(C->getNumThreads());
284 }
285 
286 void OMPClauseProfiler::VisitOMPSafelenClause(const OMPSafelenClause *C) {
287   if (C->getSafelen())
288     Profiler->VisitStmt(C->getSafelen());
289 }
290 
291 void OMPClauseProfiler::VisitOMPCollapseClause(const OMPCollapseClause *C) {
292   if (C->getNumForLoops())
293     Profiler->VisitStmt(C->getNumForLoops());
294 }
295 
296 void OMPClauseProfiler::VisitOMPDefaultClause(const OMPDefaultClause *C) { }
297 
298 void OMPClauseProfiler::VisitOMPProcBindClause(const OMPProcBindClause *C) { }
299 
300 void OMPClauseProfiler::VisitOMPScheduleClause(const OMPScheduleClause *C) {
301   if (C->getChunkSize())
302     Profiler->VisitStmt(C->getChunkSize());
303 }
304 
305 void OMPClauseProfiler::VisitOMPOrderedClause(const OMPOrderedClause *) {}
306 
307 void OMPClauseProfiler::VisitOMPNowaitClause(const OMPNowaitClause *) {}
308 
309 void OMPClauseProfiler::VisitOMPUntiedClause(const OMPUntiedClause *) {}
310 
311 void OMPClauseProfiler::VisitOMPMergeableClause(const OMPMergeableClause *) {}
312 
313 void OMPClauseProfiler::VisitOMPReadClause(const OMPReadClause *) {}
314 
315 void OMPClauseProfiler::VisitOMPWriteClause(const OMPWriteClause *) {}
316 
317 void OMPClauseProfiler::VisitOMPUpdateClause(const OMPUpdateClause *) {}
318 
319 void OMPClauseProfiler::VisitOMPCaptureClause(const OMPCaptureClause *) {}
320 
321 void OMPClauseProfiler::VisitOMPSeqCstClause(const OMPSeqCstClause *) {}
322 
323 template<typename T>
324 void OMPClauseProfiler::VisitOMPClauseList(T *Node) {
325   for (auto *I : Node->varlists())
326     Profiler->VisitStmt(I);
327 }
328 
329 void OMPClauseProfiler::VisitOMPPrivateClause(const OMPPrivateClause *C) {
330   VisitOMPClauseList(C);
331 }
332 void OMPClauseProfiler::VisitOMPFirstprivateClause(
333                                          const OMPFirstprivateClause *C) {
334   VisitOMPClauseList(C);
335 }
336 void
337 OMPClauseProfiler::VisitOMPLastprivateClause(const OMPLastprivateClause *C) {
338   VisitOMPClauseList(C);
339 }
340 void OMPClauseProfiler::VisitOMPSharedClause(const OMPSharedClause *C) {
341   VisitOMPClauseList(C);
342 }
343 void OMPClauseProfiler::VisitOMPReductionClause(
344                                          const OMPReductionClause *C) {
345   Profiler->VisitNestedNameSpecifier(
346       C->getQualifierLoc().getNestedNameSpecifier());
347   Profiler->VisitName(C->getNameInfo().getName());
348   VisitOMPClauseList(C);
349 }
350 void OMPClauseProfiler::VisitOMPLinearClause(const OMPLinearClause *C) {
351   VisitOMPClauseList(C);
352   Profiler->VisitStmt(C->getStep());
353 }
354 void OMPClauseProfiler::VisitOMPAlignedClause(const OMPAlignedClause *C) {
355   VisitOMPClauseList(C);
356   Profiler->VisitStmt(C->getAlignment());
357 }
358 void OMPClauseProfiler::VisitOMPCopyinClause(const OMPCopyinClause *C) {
359   VisitOMPClauseList(C);
360 }
361 void
362 OMPClauseProfiler::VisitOMPCopyprivateClause(const OMPCopyprivateClause *C) {
363   VisitOMPClauseList(C);
364 }
365 void OMPClauseProfiler::VisitOMPFlushClause(const OMPFlushClause *C) {
366   VisitOMPClauseList(C);
367 }
368 }
369 
370 void
371 StmtProfiler::VisitOMPExecutableDirective(const OMPExecutableDirective *S) {
372   VisitStmt(S);
373   OMPClauseProfiler P(this);
374   ArrayRef<OMPClause *> Clauses = S->clauses();
375   for (ArrayRef<OMPClause *>::iterator I = Clauses.begin(), E = Clauses.end();
376        I != E; ++I)
377     if (*I)
378       P.Visit(*I);
379 }
380 
381 void StmtProfiler::VisitOMPParallelDirective(const OMPParallelDirective *S) {
382   VisitOMPExecutableDirective(S);
383 }
384 
385 void StmtProfiler::VisitOMPSimdDirective(const OMPSimdDirective *S) {
386   VisitOMPExecutableDirective(S);
387 }
388 
389 void StmtProfiler::VisitOMPForDirective(const OMPForDirective *S) {
390   VisitOMPExecutableDirective(S);
391 }
392 
393 void StmtProfiler::VisitOMPSectionsDirective(const OMPSectionsDirective *S) {
394   VisitOMPExecutableDirective(S);
395 }
396 
397 void StmtProfiler::VisitOMPSectionDirective(const OMPSectionDirective *S) {
398   VisitOMPExecutableDirective(S);
399 }
400 
401 void StmtProfiler::VisitOMPSingleDirective(const OMPSingleDirective *S) {
402   VisitOMPExecutableDirective(S);
403 }
404 
405 void StmtProfiler::VisitOMPMasterDirective(const OMPMasterDirective *S) {
406   VisitOMPExecutableDirective(S);
407 }
408 
409 void StmtProfiler::VisitOMPCriticalDirective(const OMPCriticalDirective *S) {
410   VisitOMPExecutableDirective(S);
411   VisitName(S->getDirectiveName().getName());
412 }
413 
414 void
415 StmtProfiler::VisitOMPParallelForDirective(const OMPParallelForDirective *S) {
416   VisitOMPExecutableDirective(S);
417 }
418 
419 void StmtProfiler::VisitOMPParallelSectionsDirective(
420     const OMPParallelSectionsDirective *S) {
421   VisitOMPExecutableDirective(S);
422 }
423 
424 void StmtProfiler::VisitOMPTaskDirective(const OMPTaskDirective *S) {
425   VisitOMPExecutableDirective(S);
426 }
427 
428 void StmtProfiler::VisitOMPTaskyieldDirective(const OMPTaskyieldDirective *S) {
429   VisitOMPExecutableDirective(S);
430 }
431 
432 void StmtProfiler::VisitOMPBarrierDirective(const OMPBarrierDirective *S) {
433   VisitOMPExecutableDirective(S);
434 }
435 
436 void StmtProfiler::VisitOMPTaskwaitDirective(const OMPTaskwaitDirective *S) {
437   VisitOMPExecutableDirective(S);
438 }
439 
440 void StmtProfiler::VisitOMPFlushDirective(const OMPFlushDirective *S) {
441   VisitOMPExecutableDirective(S);
442 }
443 
444 void StmtProfiler::VisitOMPOrderedDirective(const OMPOrderedDirective *S) {
445   VisitOMPExecutableDirective(S);
446 }
447 
448 void StmtProfiler::VisitOMPAtomicDirective(const OMPAtomicDirective *S) {
449   VisitOMPExecutableDirective(S);
450 }
451 
452 void StmtProfiler::VisitExpr(const Expr *S) {
453   VisitStmt(S);
454 }
455 
456 void StmtProfiler::VisitDeclRefExpr(const DeclRefExpr *S) {
457   VisitExpr(S);
458   if (!Canonical)
459     VisitNestedNameSpecifier(S->getQualifier());
460   VisitDecl(S->getDecl());
461   if (!Canonical)
462     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
463 }
464 
465 void StmtProfiler::VisitPredefinedExpr(const PredefinedExpr *S) {
466   VisitExpr(S);
467   ID.AddInteger(S->getIdentType());
468 }
469 
470 void StmtProfiler::VisitIntegerLiteral(const IntegerLiteral *S) {
471   VisitExpr(S);
472   S->getValue().Profile(ID);
473 }
474 
475 void StmtProfiler::VisitCharacterLiteral(const CharacterLiteral *S) {
476   VisitExpr(S);
477   ID.AddInteger(S->getKind());
478   ID.AddInteger(S->getValue());
479 }
480 
481 void StmtProfiler::VisitFloatingLiteral(const FloatingLiteral *S) {
482   VisitExpr(S);
483   S->getValue().Profile(ID);
484   ID.AddBoolean(S->isExact());
485 }
486 
487 void StmtProfiler::VisitImaginaryLiteral(const ImaginaryLiteral *S) {
488   VisitExpr(S);
489 }
490 
491 void StmtProfiler::VisitStringLiteral(const StringLiteral *S) {
492   VisitExpr(S);
493   ID.AddString(S->getBytes());
494   ID.AddInteger(S->getKind());
495 }
496 
497 void StmtProfiler::VisitParenExpr(const ParenExpr *S) {
498   VisitExpr(S);
499 }
500 
501 void StmtProfiler::VisitParenListExpr(const ParenListExpr *S) {
502   VisitExpr(S);
503 }
504 
505 void StmtProfiler::VisitUnaryOperator(const UnaryOperator *S) {
506   VisitExpr(S);
507   ID.AddInteger(S->getOpcode());
508 }
509 
510 void StmtProfiler::VisitOffsetOfExpr(const OffsetOfExpr *S) {
511   VisitType(S->getTypeSourceInfo()->getType());
512   unsigned n = S->getNumComponents();
513   for (unsigned i = 0; i < n; ++i) {
514     const OffsetOfExpr::OffsetOfNode& ON = S->getComponent(i);
515     ID.AddInteger(ON.getKind());
516     switch (ON.getKind()) {
517     case OffsetOfExpr::OffsetOfNode::Array:
518       // Expressions handled below.
519       break;
520 
521     case OffsetOfExpr::OffsetOfNode::Field:
522       VisitDecl(ON.getField());
523       break;
524 
525     case OffsetOfExpr::OffsetOfNode::Identifier:
526       ID.AddPointer(ON.getFieldName());
527       break;
528 
529     case OffsetOfExpr::OffsetOfNode::Base:
530       // These nodes are implicit, and therefore don't need profiling.
531       break;
532     }
533   }
534 
535   VisitExpr(S);
536 }
537 
538 void
539 StmtProfiler::VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *S) {
540   VisitExpr(S);
541   ID.AddInteger(S->getKind());
542   if (S->isArgumentType())
543     VisitType(S->getArgumentType());
544 }
545 
546 void StmtProfiler::VisitArraySubscriptExpr(const ArraySubscriptExpr *S) {
547   VisitExpr(S);
548 }
549 
550 void StmtProfiler::VisitCallExpr(const CallExpr *S) {
551   VisitExpr(S);
552 }
553 
554 void StmtProfiler::VisitMemberExpr(const MemberExpr *S) {
555   VisitExpr(S);
556   VisitDecl(S->getMemberDecl());
557   if (!Canonical)
558     VisitNestedNameSpecifier(S->getQualifier());
559   ID.AddBoolean(S->isArrow());
560 }
561 
562 void StmtProfiler::VisitCompoundLiteralExpr(const CompoundLiteralExpr *S) {
563   VisitExpr(S);
564   ID.AddBoolean(S->isFileScope());
565 }
566 
567 void StmtProfiler::VisitCastExpr(const CastExpr *S) {
568   VisitExpr(S);
569 }
570 
571 void StmtProfiler::VisitImplicitCastExpr(const ImplicitCastExpr *S) {
572   VisitCastExpr(S);
573   ID.AddInteger(S->getValueKind());
574 }
575 
576 void StmtProfiler::VisitExplicitCastExpr(const ExplicitCastExpr *S) {
577   VisitCastExpr(S);
578   VisitType(S->getTypeAsWritten());
579 }
580 
581 void StmtProfiler::VisitCStyleCastExpr(const CStyleCastExpr *S) {
582   VisitExplicitCastExpr(S);
583 }
584 
585 void StmtProfiler::VisitBinaryOperator(const BinaryOperator *S) {
586   VisitExpr(S);
587   ID.AddInteger(S->getOpcode());
588 }
589 
590 void
591 StmtProfiler::VisitCompoundAssignOperator(const CompoundAssignOperator *S) {
592   VisitBinaryOperator(S);
593 }
594 
595 void StmtProfiler::VisitConditionalOperator(const ConditionalOperator *S) {
596   VisitExpr(S);
597 }
598 
599 void StmtProfiler::VisitBinaryConditionalOperator(
600     const BinaryConditionalOperator *S) {
601   VisitExpr(S);
602 }
603 
604 void StmtProfiler::VisitAddrLabelExpr(const AddrLabelExpr *S) {
605   VisitExpr(S);
606   VisitDecl(S->getLabel());
607 }
608 
609 void StmtProfiler::VisitStmtExpr(const StmtExpr *S) {
610   VisitExpr(S);
611 }
612 
613 void StmtProfiler::VisitShuffleVectorExpr(const ShuffleVectorExpr *S) {
614   VisitExpr(S);
615 }
616 
617 void StmtProfiler::VisitConvertVectorExpr(const ConvertVectorExpr *S) {
618   VisitExpr(S);
619 }
620 
621 void StmtProfiler::VisitChooseExpr(const ChooseExpr *S) {
622   VisitExpr(S);
623 }
624 
625 void StmtProfiler::VisitGNUNullExpr(const GNUNullExpr *S) {
626   VisitExpr(S);
627 }
628 
629 void StmtProfiler::VisitVAArgExpr(const VAArgExpr *S) {
630   VisitExpr(S);
631 }
632 
633 void StmtProfiler::VisitInitListExpr(const InitListExpr *S) {
634   if (S->getSyntacticForm()) {
635     VisitInitListExpr(S->getSyntacticForm());
636     return;
637   }
638 
639   VisitExpr(S);
640 }
641 
642 void StmtProfiler::VisitDesignatedInitExpr(const DesignatedInitExpr *S) {
643   VisitExpr(S);
644   ID.AddBoolean(S->usesGNUSyntax());
645   for (DesignatedInitExpr::const_designators_iterator D =
646          S->designators_begin(), DEnd = S->designators_end();
647        D != DEnd; ++D) {
648     if (D->isFieldDesignator()) {
649       ID.AddInteger(0);
650       VisitName(D->getFieldName());
651       continue;
652     }
653 
654     if (D->isArrayDesignator()) {
655       ID.AddInteger(1);
656     } else {
657       assert(D->isArrayRangeDesignator());
658       ID.AddInteger(2);
659     }
660     ID.AddInteger(D->getFirstExprIndex());
661   }
662 }
663 
664 void StmtProfiler::VisitImplicitValueInitExpr(const ImplicitValueInitExpr *S) {
665   VisitExpr(S);
666 }
667 
668 void StmtProfiler::VisitExtVectorElementExpr(const ExtVectorElementExpr *S) {
669   VisitExpr(S);
670   VisitName(&S->getAccessor());
671 }
672 
673 void StmtProfiler::VisitBlockExpr(const BlockExpr *S) {
674   VisitExpr(S);
675   VisitDecl(S->getBlockDecl());
676 }
677 
678 void StmtProfiler::VisitGenericSelectionExpr(const GenericSelectionExpr *S) {
679   VisitExpr(S);
680   for (unsigned i = 0; i != S->getNumAssocs(); ++i) {
681     QualType T = S->getAssocType(i);
682     if (T.isNull())
683       ID.AddPointer(nullptr);
684     else
685       VisitType(T);
686     VisitExpr(S->getAssocExpr(i));
687   }
688 }
689 
690 void StmtProfiler::VisitPseudoObjectExpr(const PseudoObjectExpr *S) {
691   VisitExpr(S);
692   for (PseudoObjectExpr::const_semantics_iterator
693          i = S->semantics_begin(), e = S->semantics_end(); i != e; ++i)
694     // Normally, we would not profile the source expressions of OVEs.
695     if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(*i))
696       Visit(OVE->getSourceExpr());
697 }
698 
699 void StmtProfiler::VisitAtomicExpr(const AtomicExpr *S) {
700   VisitExpr(S);
701   ID.AddInteger(S->getOp());
702 }
703 
704 static Stmt::StmtClass DecodeOperatorCall(const CXXOperatorCallExpr *S,
705                                           UnaryOperatorKind &UnaryOp,
706                                           BinaryOperatorKind &BinaryOp) {
707   switch (S->getOperator()) {
708   case OO_None:
709   case OO_New:
710   case OO_Delete:
711   case OO_Array_New:
712   case OO_Array_Delete:
713   case OO_Arrow:
714   case OO_Call:
715   case OO_Conditional:
716   case NUM_OVERLOADED_OPERATORS:
717     llvm_unreachable("Invalid operator call kind");
718 
719   case OO_Plus:
720     if (S->getNumArgs() == 1) {
721       UnaryOp = UO_Plus;
722       return Stmt::UnaryOperatorClass;
723     }
724 
725     BinaryOp = BO_Add;
726     return Stmt::BinaryOperatorClass;
727 
728   case OO_Minus:
729     if (S->getNumArgs() == 1) {
730       UnaryOp = UO_Minus;
731       return Stmt::UnaryOperatorClass;
732     }
733 
734     BinaryOp = BO_Sub;
735     return Stmt::BinaryOperatorClass;
736 
737   case OO_Star:
738     if (S->getNumArgs() == 1) {
739       UnaryOp = UO_Deref;
740       return Stmt::UnaryOperatorClass;
741     }
742 
743     BinaryOp = BO_Mul;
744     return Stmt::BinaryOperatorClass;
745 
746   case OO_Slash:
747     BinaryOp = BO_Div;
748     return Stmt::BinaryOperatorClass;
749 
750   case OO_Percent:
751     BinaryOp = BO_Rem;
752     return Stmt::BinaryOperatorClass;
753 
754   case OO_Caret:
755     BinaryOp = BO_Xor;
756     return Stmt::BinaryOperatorClass;
757 
758   case OO_Amp:
759     if (S->getNumArgs() == 1) {
760       UnaryOp = UO_AddrOf;
761       return Stmt::UnaryOperatorClass;
762     }
763 
764     BinaryOp = BO_And;
765     return Stmt::BinaryOperatorClass;
766 
767   case OO_Pipe:
768     BinaryOp = BO_Or;
769     return Stmt::BinaryOperatorClass;
770 
771   case OO_Tilde:
772     UnaryOp = UO_Not;
773     return Stmt::UnaryOperatorClass;
774 
775   case OO_Exclaim:
776     UnaryOp = UO_LNot;
777     return Stmt::UnaryOperatorClass;
778 
779   case OO_Equal:
780     BinaryOp = BO_Assign;
781     return Stmt::BinaryOperatorClass;
782 
783   case OO_Less:
784     BinaryOp = BO_LT;
785     return Stmt::BinaryOperatorClass;
786 
787   case OO_Greater:
788     BinaryOp = BO_GT;
789     return Stmt::BinaryOperatorClass;
790 
791   case OO_PlusEqual:
792     BinaryOp = BO_AddAssign;
793     return Stmt::CompoundAssignOperatorClass;
794 
795   case OO_MinusEqual:
796     BinaryOp = BO_SubAssign;
797     return Stmt::CompoundAssignOperatorClass;
798 
799   case OO_StarEqual:
800     BinaryOp = BO_MulAssign;
801     return Stmt::CompoundAssignOperatorClass;
802 
803   case OO_SlashEqual:
804     BinaryOp = BO_DivAssign;
805     return Stmt::CompoundAssignOperatorClass;
806 
807   case OO_PercentEqual:
808     BinaryOp = BO_RemAssign;
809     return Stmt::CompoundAssignOperatorClass;
810 
811   case OO_CaretEqual:
812     BinaryOp = BO_XorAssign;
813     return Stmt::CompoundAssignOperatorClass;
814 
815   case OO_AmpEqual:
816     BinaryOp = BO_AndAssign;
817     return Stmt::CompoundAssignOperatorClass;
818 
819   case OO_PipeEqual:
820     BinaryOp = BO_OrAssign;
821     return Stmt::CompoundAssignOperatorClass;
822 
823   case OO_LessLess:
824     BinaryOp = BO_Shl;
825     return Stmt::BinaryOperatorClass;
826 
827   case OO_GreaterGreater:
828     BinaryOp = BO_Shr;
829     return Stmt::BinaryOperatorClass;
830 
831   case OO_LessLessEqual:
832     BinaryOp = BO_ShlAssign;
833     return Stmt::CompoundAssignOperatorClass;
834 
835   case OO_GreaterGreaterEqual:
836     BinaryOp = BO_ShrAssign;
837     return Stmt::CompoundAssignOperatorClass;
838 
839   case OO_EqualEqual:
840     BinaryOp = BO_EQ;
841     return Stmt::BinaryOperatorClass;
842 
843   case OO_ExclaimEqual:
844     BinaryOp = BO_NE;
845     return Stmt::BinaryOperatorClass;
846 
847   case OO_LessEqual:
848     BinaryOp = BO_LE;
849     return Stmt::BinaryOperatorClass;
850 
851   case OO_GreaterEqual:
852     BinaryOp = BO_GE;
853     return Stmt::BinaryOperatorClass;
854 
855   case OO_AmpAmp:
856     BinaryOp = BO_LAnd;
857     return Stmt::BinaryOperatorClass;
858 
859   case OO_PipePipe:
860     BinaryOp = BO_LOr;
861     return Stmt::BinaryOperatorClass;
862 
863   case OO_PlusPlus:
864     UnaryOp = S->getNumArgs() == 1? UO_PreInc
865                                   : UO_PostInc;
866     return Stmt::UnaryOperatorClass;
867 
868   case OO_MinusMinus:
869     UnaryOp = S->getNumArgs() == 1? UO_PreDec
870                                   : UO_PostDec;
871     return Stmt::UnaryOperatorClass;
872 
873   case OO_Comma:
874     BinaryOp = BO_Comma;
875     return Stmt::BinaryOperatorClass;
876 
877 
878   case OO_ArrowStar:
879     BinaryOp = BO_PtrMemI;
880     return Stmt::BinaryOperatorClass;
881 
882   case OO_Subscript:
883     return Stmt::ArraySubscriptExprClass;
884   }
885 
886   llvm_unreachable("Invalid overloaded operator expression");
887 }
888 
889 
890 void StmtProfiler::VisitCXXOperatorCallExpr(const CXXOperatorCallExpr *S) {
891   if (S->isTypeDependent()) {
892     // Type-dependent operator calls are profiled like their underlying
893     // syntactic operator.
894     UnaryOperatorKind UnaryOp = UO_Extension;
895     BinaryOperatorKind BinaryOp = BO_Comma;
896     Stmt::StmtClass SC = DecodeOperatorCall(S, UnaryOp, BinaryOp);
897 
898     ID.AddInteger(SC);
899     for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
900       Visit(S->getArg(I));
901     if (SC == Stmt::UnaryOperatorClass)
902       ID.AddInteger(UnaryOp);
903     else if (SC == Stmt::BinaryOperatorClass ||
904              SC == Stmt::CompoundAssignOperatorClass)
905       ID.AddInteger(BinaryOp);
906     else
907       assert(SC == Stmt::ArraySubscriptExprClass);
908 
909     return;
910   }
911 
912   VisitCallExpr(S);
913   ID.AddInteger(S->getOperator());
914 }
915 
916 void StmtProfiler::VisitCXXMemberCallExpr(const CXXMemberCallExpr *S) {
917   VisitCallExpr(S);
918 }
919 
920 void StmtProfiler::VisitCUDAKernelCallExpr(const CUDAKernelCallExpr *S) {
921   VisitCallExpr(S);
922 }
923 
924 void StmtProfiler::VisitAsTypeExpr(const AsTypeExpr *S) {
925   VisitExpr(S);
926 }
927 
928 void StmtProfiler::VisitCXXNamedCastExpr(const CXXNamedCastExpr *S) {
929   VisitExplicitCastExpr(S);
930 }
931 
932 void StmtProfiler::VisitCXXStaticCastExpr(const CXXStaticCastExpr *S) {
933   VisitCXXNamedCastExpr(S);
934 }
935 
936 void StmtProfiler::VisitCXXDynamicCastExpr(const CXXDynamicCastExpr *S) {
937   VisitCXXNamedCastExpr(S);
938 }
939 
940 void
941 StmtProfiler::VisitCXXReinterpretCastExpr(const CXXReinterpretCastExpr *S) {
942   VisitCXXNamedCastExpr(S);
943 }
944 
945 void StmtProfiler::VisitCXXConstCastExpr(const CXXConstCastExpr *S) {
946   VisitCXXNamedCastExpr(S);
947 }
948 
949 void StmtProfiler::VisitUserDefinedLiteral(const UserDefinedLiteral *S) {
950   VisitCallExpr(S);
951 }
952 
953 void StmtProfiler::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *S) {
954   VisitExpr(S);
955   ID.AddBoolean(S->getValue());
956 }
957 
958 void StmtProfiler::VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *S) {
959   VisitExpr(S);
960 }
961 
962 void StmtProfiler::VisitCXXStdInitializerListExpr(
963     const CXXStdInitializerListExpr *S) {
964   VisitExpr(S);
965 }
966 
967 void StmtProfiler::VisitCXXTypeidExpr(const CXXTypeidExpr *S) {
968   VisitExpr(S);
969   if (S->isTypeOperand())
970     VisitType(S->getTypeOperandSourceInfo()->getType());
971 }
972 
973 void StmtProfiler::VisitCXXUuidofExpr(const CXXUuidofExpr *S) {
974   VisitExpr(S);
975   if (S->isTypeOperand())
976     VisitType(S->getTypeOperandSourceInfo()->getType());
977 }
978 
979 void StmtProfiler::VisitMSPropertyRefExpr(const MSPropertyRefExpr *S) {
980   VisitExpr(S);
981   VisitDecl(S->getPropertyDecl());
982 }
983 
984 void StmtProfiler::VisitCXXThisExpr(const CXXThisExpr *S) {
985   VisitExpr(S);
986   ID.AddBoolean(S->isImplicit());
987 }
988 
989 void StmtProfiler::VisitCXXThrowExpr(const CXXThrowExpr *S) {
990   VisitExpr(S);
991 }
992 
993 void StmtProfiler::VisitCXXDefaultArgExpr(const CXXDefaultArgExpr *S) {
994   VisitExpr(S);
995   VisitDecl(S->getParam());
996 }
997 
998 void StmtProfiler::VisitCXXDefaultInitExpr(const CXXDefaultInitExpr *S) {
999   VisitExpr(S);
1000   VisitDecl(S->getField());
1001 }
1002 
1003 void StmtProfiler::VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *S) {
1004   VisitExpr(S);
1005   VisitDecl(
1006          const_cast<CXXDestructorDecl *>(S->getTemporary()->getDestructor()));
1007 }
1008 
1009 void StmtProfiler::VisitCXXConstructExpr(const CXXConstructExpr *S) {
1010   VisitExpr(S);
1011   VisitDecl(S->getConstructor());
1012   ID.AddBoolean(S->isElidable());
1013 }
1014 
1015 void StmtProfiler::VisitCXXFunctionalCastExpr(const CXXFunctionalCastExpr *S) {
1016   VisitExplicitCastExpr(S);
1017 }
1018 
1019 void
1020 StmtProfiler::VisitCXXTemporaryObjectExpr(const CXXTemporaryObjectExpr *S) {
1021   VisitCXXConstructExpr(S);
1022 }
1023 
1024 void
1025 StmtProfiler::VisitLambdaExpr(const LambdaExpr *S) {
1026   VisitExpr(S);
1027   for (LambdaExpr::capture_iterator C = S->explicit_capture_begin(),
1028                                  CEnd = S->explicit_capture_end();
1029        C != CEnd; ++C) {
1030     ID.AddInteger(C->getCaptureKind());
1031     switch (C->getCaptureKind()) {
1032     case LCK_This:
1033       break;
1034     case LCK_ByRef:
1035     case LCK_ByCopy:
1036       VisitDecl(C->getCapturedVar());
1037       ID.AddBoolean(C->isPackExpansion());
1038       break;
1039     }
1040   }
1041   // Note: If we actually needed to be able to match lambda
1042   // expressions, we would have to consider parameters and return type
1043   // here, among other things.
1044   VisitStmt(S->getBody());
1045 }
1046 
1047 void
1048 StmtProfiler::VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *S) {
1049   VisitExpr(S);
1050 }
1051 
1052 void StmtProfiler::VisitCXXDeleteExpr(const CXXDeleteExpr *S) {
1053   VisitExpr(S);
1054   ID.AddBoolean(S->isGlobalDelete());
1055   ID.AddBoolean(S->isArrayForm());
1056   VisitDecl(S->getOperatorDelete());
1057 }
1058 
1059 
1060 void StmtProfiler::VisitCXXNewExpr(const CXXNewExpr *S) {
1061   VisitExpr(S);
1062   VisitType(S->getAllocatedType());
1063   VisitDecl(S->getOperatorNew());
1064   VisitDecl(S->getOperatorDelete());
1065   ID.AddBoolean(S->isArray());
1066   ID.AddInteger(S->getNumPlacementArgs());
1067   ID.AddBoolean(S->isGlobalNew());
1068   ID.AddBoolean(S->isParenTypeId());
1069   ID.AddInteger(S->getInitializationStyle());
1070 }
1071 
1072 void
1073 StmtProfiler::VisitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *S) {
1074   VisitExpr(S);
1075   ID.AddBoolean(S->isArrow());
1076   VisitNestedNameSpecifier(S->getQualifier());
1077   ID.AddBoolean(S->getScopeTypeInfo() != nullptr);
1078   if (S->getScopeTypeInfo())
1079     VisitType(S->getScopeTypeInfo()->getType());
1080   ID.AddBoolean(S->getDestroyedTypeInfo() != nullptr);
1081   if (S->getDestroyedTypeInfo())
1082     VisitType(S->getDestroyedType());
1083   else
1084     ID.AddPointer(S->getDestroyedTypeIdentifier());
1085 }
1086 
1087 void StmtProfiler::VisitOverloadExpr(const OverloadExpr *S) {
1088   VisitExpr(S);
1089   VisitNestedNameSpecifier(S->getQualifier());
1090   VisitName(S->getName());
1091   ID.AddBoolean(S->hasExplicitTemplateArgs());
1092   if (S->hasExplicitTemplateArgs())
1093     VisitTemplateArguments(S->getExplicitTemplateArgs().getTemplateArgs(),
1094                            S->getExplicitTemplateArgs().NumTemplateArgs);
1095 }
1096 
1097 void
1098 StmtProfiler::VisitUnresolvedLookupExpr(const UnresolvedLookupExpr *S) {
1099   VisitOverloadExpr(S);
1100 }
1101 
1102 void StmtProfiler::VisitTypeTraitExpr(const TypeTraitExpr *S) {
1103   VisitExpr(S);
1104   ID.AddInteger(S->getTrait());
1105   ID.AddInteger(S->getNumArgs());
1106   for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
1107     VisitType(S->getArg(I)->getType());
1108 }
1109 
1110 void StmtProfiler::VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *S) {
1111   VisitExpr(S);
1112   ID.AddInteger(S->getTrait());
1113   VisitType(S->getQueriedType());
1114 }
1115 
1116 void StmtProfiler::VisitExpressionTraitExpr(const ExpressionTraitExpr *S) {
1117   VisitExpr(S);
1118   ID.AddInteger(S->getTrait());
1119   VisitExpr(S->getQueriedExpression());
1120 }
1121 
1122 void StmtProfiler::VisitDependentScopeDeclRefExpr(
1123     const DependentScopeDeclRefExpr *S) {
1124   VisitExpr(S);
1125   VisitName(S->getDeclName());
1126   VisitNestedNameSpecifier(S->getQualifier());
1127   ID.AddBoolean(S->hasExplicitTemplateArgs());
1128   if (S->hasExplicitTemplateArgs())
1129     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1130 }
1131 
1132 void StmtProfiler::VisitExprWithCleanups(const ExprWithCleanups *S) {
1133   VisitExpr(S);
1134 }
1135 
1136 void StmtProfiler::VisitCXXUnresolvedConstructExpr(
1137     const CXXUnresolvedConstructExpr *S) {
1138   VisitExpr(S);
1139   VisitType(S->getTypeAsWritten());
1140 }
1141 
1142 void StmtProfiler::VisitCXXDependentScopeMemberExpr(
1143     const CXXDependentScopeMemberExpr *S) {
1144   ID.AddBoolean(S->isImplicitAccess());
1145   if (!S->isImplicitAccess()) {
1146     VisitExpr(S);
1147     ID.AddBoolean(S->isArrow());
1148   }
1149   VisitNestedNameSpecifier(S->getQualifier());
1150   VisitName(S->getMember());
1151   ID.AddBoolean(S->hasExplicitTemplateArgs());
1152   if (S->hasExplicitTemplateArgs())
1153     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1154 }
1155 
1156 void StmtProfiler::VisitUnresolvedMemberExpr(const UnresolvedMemberExpr *S) {
1157   ID.AddBoolean(S->isImplicitAccess());
1158   if (!S->isImplicitAccess()) {
1159     VisitExpr(S);
1160     ID.AddBoolean(S->isArrow());
1161   }
1162   VisitNestedNameSpecifier(S->getQualifier());
1163   VisitName(S->getMemberName());
1164   ID.AddBoolean(S->hasExplicitTemplateArgs());
1165   if (S->hasExplicitTemplateArgs())
1166     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1167 }
1168 
1169 void StmtProfiler::VisitCXXNoexceptExpr(const CXXNoexceptExpr *S) {
1170   VisitExpr(S);
1171 }
1172 
1173 void StmtProfiler::VisitPackExpansionExpr(const PackExpansionExpr *S) {
1174   VisitExpr(S);
1175 }
1176 
1177 void StmtProfiler::VisitSizeOfPackExpr(const SizeOfPackExpr *S) {
1178   VisitExpr(S);
1179   VisitDecl(S->getPack());
1180 }
1181 
1182 void StmtProfiler::VisitSubstNonTypeTemplateParmPackExpr(
1183     const SubstNonTypeTemplateParmPackExpr *S) {
1184   VisitExpr(S);
1185   VisitDecl(S->getParameterPack());
1186   VisitTemplateArgument(S->getArgumentPack());
1187 }
1188 
1189 void StmtProfiler::VisitSubstNonTypeTemplateParmExpr(
1190     const SubstNonTypeTemplateParmExpr *E) {
1191   // Profile exactly as the replacement expression.
1192   Visit(E->getReplacement());
1193 }
1194 
1195 void StmtProfiler::VisitFunctionParmPackExpr(const FunctionParmPackExpr *S) {
1196   VisitExpr(S);
1197   VisitDecl(S->getParameterPack());
1198   ID.AddInteger(S->getNumExpansions());
1199   for (FunctionParmPackExpr::iterator I = S->begin(), E = S->end(); I != E; ++I)
1200     VisitDecl(*I);
1201 }
1202 
1203 void StmtProfiler::VisitMaterializeTemporaryExpr(
1204                                            const MaterializeTemporaryExpr *S) {
1205   VisitExpr(S);
1206 }
1207 
1208 void StmtProfiler::VisitOpaqueValueExpr(const OpaqueValueExpr *E) {
1209   VisitExpr(E);
1210 }
1211 
1212 void StmtProfiler::VisitObjCStringLiteral(const ObjCStringLiteral *S) {
1213   VisitExpr(S);
1214 }
1215 
1216 void StmtProfiler::VisitObjCBoxedExpr(const ObjCBoxedExpr *E) {
1217   VisitExpr(E);
1218 }
1219 
1220 void StmtProfiler::VisitObjCArrayLiteral(const ObjCArrayLiteral *E) {
1221   VisitExpr(E);
1222 }
1223 
1224 void StmtProfiler::VisitObjCDictionaryLiteral(const ObjCDictionaryLiteral *E) {
1225   VisitExpr(E);
1226 }
1227 
1228 void StmtProfiler::VisitObjCEncodeExpr(const ObjCEncodeExpr *S) {
1229   VisitExpr(S);
1230   VisitType(S->getEncodedType());
1231 }
1232 
1233 void StmtProfiler::VisitObjCSelectorExpr(const ObjCSelectorExpr *S) {
1234   VisitExpr(S);
1235   VisitName(S->getSelector());
1236 }
1237 
1238 void StmtProfiler::VisitObjCProtocolExpr(const ObjCProtocolExpr *S) {
1239   VisitExpr(S);
1240   VisitDecl(S->getProtocol());
1241 }
1242 
1243 void StmtProfiler::VisitObjCIvarRefExpr(const ObjCIvarRefExpr *S) {
1244   VisitExpr(S);
1245   VisitDecl(S->getDecl());
1246   ID.AddBoolean(S->isArrow());
1247   ID.AddBoolean(S->isFreeIvar());
1248 }
1249 
1250 void StmtProfiler::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *S) {
1251   VisitExpr(S);
1252   if (S->isImplicitProperty()) {
1253     VisitDecl(S->getImplicitPropertyGetter());
1254     VisitDecl(S->getImplicitPropertySetter());
1255   } else {
1256     VisitDecl(S->getExplicitProperty());
1257   }
1258   if (S->isSuperReceiver()) {
1259     ID.AddBoolean(S->isSuperReceiver());
1260     VisitType(S->getSuperReceiverType());
1261   }
1262 }
1263 
1264 void StmtProfiler::VisitObjCSubscriptRefExpr(const ObjCSubscriptRefExpr *S) {
1265   VisitExpr(S);
1266   VisitDecl(S->getAtIndexMethodDecl());
1267   VisitDecl(S->setAtIndexMethodDecl());
1268 }
1269 
1270 void StmtProfiler::VisitObjCMessageExpr(const ObjCMessageExpr *S) {
1271   VisitExpr(S);
1272   VisitName(S->getSelector());
1273   VisitDecl(S->getMethodDecl());
1274 }
1275 
1276 void StmtProfiler::VisitObjCIsaExpr(const ObjCIsaExpr *S) {
1277   VisitExpr(S);
1278   ID.AddBoolean(S->isArrow());
1279 }
1280 
1281 void StmtProfiler::VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *S) {
1282   VisitExpr(S);
1283   ID.AddBoolean(S->getValue());
1284 }
1285 
1286 void StmtProfiler::VisitObjCIndirectCopyRestoreExpr(
1287     const ObjCIndirectCopyRestoreExpr *S) {
1288   VisitExpr(S);
1289   ID.AddBoolean(S->shouldCopy());
1290 }
1291 
1292 void StmtProfiler::VisitObjCBridgedCastExpr(const ObjCBridgedCastExpr *S) {
1293   VisitExplicitCastExpr(S);
1294   ID.AddBoolean(S->getBridgeKind());
1295 }
1296 
1297 void StmtProfiler::VisitDecl(const Decl *D) {
1298   ID.AddInteger(D? D->getKind() : 0);
1299 
1300   if (Canonical && D) {
1301     if (const NonTypeTemplateParmDecl *NTTP =
1302           dyn_cast<NonTypeTemplateParmDecl>(D)) {
1303       ID.AddInteger(NTTP->getDepth());
1304       ID.AddInteger(NTTP->getIndex());
1305       ID.AddBoolean(NTTP->isParameterPack());
1306       VisitType(NTTP->getType());
1307       return;
1308     }
1309 
1310     if (const ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D)) {
1311       // The Itanium C++ ABI uses the type, scope depth, and scope
1312       // index of a parameter when mangling expressions that involve
1313       // function parameters, so we will use the parameter's type for
1314       // establishing function parameter identity. That way, our
1315       // definition of "equivalent" (per C++ [temp.over.link]) is at
1316       // least as strong as the definition of "equivalent" used for
1317       // name mangling.
1318       VisitType(Parm->getType());
1319       ID.AddInteger(Parm->getFunctionScopeDepth());
1320       ID.AddInteger(Parm->getFunctionScopeIndex());
1321       return;
1322     }
1323 
1324     if (const TemplateTypeParmDecl *TTP =
1325           dyn_cast<TemplateTypeParmDecl>(D)) {
1326       ID.AddInteger(TTP->getDepth());
1327       ID.AddInteger(TTP->getIndex());
1328       ID.AddBoolean(TTP->isParameterPack());
1329       return;
1330     }
1331 
1332     if (const TemplateTemplateParmDecl *TTP =
1333           dyn_cast<TemplateTemplateParmDecl>(D)) {
1334       ID.AddInteger(TTP->getDepth());
1335       ID.AddInteger(TTP->getIndex());
1336       ID.AddBoolean(TTP->isParameterPack());
1337       return;
1338     }
1339   }
1340 
1341   ID.AddPointer(D? D->getCanonicalDecl() : nullptr);
1342 }
1343 
1344 void StmtProfiler::VisitType(QualType T) {
1345   if (Canonical)
1346     T = Context.getCanonicalType(T);
1347 
1348   ID.AddPointer(T.getAsOpaquePtr());
1349 }
1350 
1351 void StmtProfiler::VisitName(DeclarationName Name) {
1352   ID.AddPointer(Name.getAsOpaquePtr());
1353 }
1354 
1355 void StmtProfiler::VisitNestedNameSpecifier(NestedNameSpecifier *NNS) {
1356   if (Canonical)
1357     NNS = Context.getCanonicalNestedNameSpecifier(NNS);
1358   ID.AddPointer(NNS);
1359 }
1360 
1361 void StmtProfiler::VisitTemplateName(TemplateName Name) {
1362   if (Canonical)
1363     Name = Context.getCanonicalTemplateName(Name);
1364 
1365   Name.Profile(ID);
1366 }
1367 
1368 void StmtProfiler::VisitTemplateArguments(const TemplateArgumentLoc *Args,
1369                                           unsigned NumArgs) {
1370   ID.AddInteger(NumArgs);
1371   for (unsigned I = 0; I != NumArgs; ++I)
1372     VisitTemplateArgument(Args[I].getArgument());
1373 }
1374 
1375 void StmtProfiler::VisitTemplateArgument(const TemplateArgument &Arg) {
1376   // Mostly repetitive with TemplateArgument::Profile!
1377   ID.AddInteger(Arg.getKind());
1378   switch (Arg.getKind()) {
1379   case TemplateArgument::Null:
1380     break;
1381 
1382   case TemplateArgument::Type:
1383     VisitType(Arg.getAsType());
1384     break;
1385 
1386   case TemplateArgument::Template:
1387   case TemplateArgument::TemplateExpansion:
1388     VisitTemplateName(Arg.getAsTemplateOrTemplatePattern());
1389     break;
1390 
1391   case TemplateArgument::Declaration:
1392     VisitDecl(Arg.getAsDecl());
1393     break;
1394 
1395   case TemplateArgument::NullPtr:
1396     VisitType(Arg.getNullPtrType());
1397     break;
1398 
1399   case TemplateArgument::Integral:
1400     Arg.getAsIntegral().Profile(ID);
1401     VisitType(Arg.getIntegralType());
1402     break;
1403 
1404   case TemplateArgument::Expression:
1405     Visit(Arg.getAsExpr());
1406     break;
1407 
1408   case TemplateArgument::Pack:
1409     for (const auto &P : Arg.pack_elements())
1410       VisitTemplateArgument(P);
1411     break;
1412   }
1413 }
1414 
1415 void Stmt::Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
1416                    bool Canonical) const {
1417   StmtProfiler Profiler(ID, Context, Canonical);
1418   Profiler.Visit(this);
1419 }
1420