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