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