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