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   for (auto *E : C->source_exprs()) {
385     Profiler->VisitStmt(E);
386   }
387   for (auto *E : C->destination_exprs()) {
388     Profiler->VisitStmt(E);
389   }
390   for (auto *E : C->assignment_ops()) {
391     Profiler->VisitStmt(E);
392   }
393 }
394 void OMPClauseProfiler::VisitOMPFlushClause(const OMPFlushClause *C) {
395   VisitOMPClauseList(C);
396 }
397 }
398 
399 void
400 StmtProfiler::VisitOMPExecutableDirective(const OMPExecutableDirective *S) {
401   VisitStmt(S);
402   OMPClauseProfiler P(this);
403   ArrayRef<OMPClause *> Clauses = S->clauses();
404   for (ArrayRef<OMPClause *>::iterator I = Clauses.begin(), E = Clauses.end();
405        I != E; ++I)
406     if (*I)
407       P.Visit(*I);
408 }
409 
410 void StmtProfiler::VisitOMPLoopDirective(const OMPLoopDirective *S) {
411   VisitOMPExecutableDirective(S);
412 }
413 
414 void StmtProfiler::VisitOMPParallelDirective(const OMPParallelDirective *S) {
415   VisitOMPExecutableDirective(S);
416 }
417 
418 void StmtProfiler::VisitOMPSimdDirective(const OMPSimdDirective *S) {
419   VisitOMPLoopDirective(S);
420 }
421 
422 void StmtProfiler::VisitOMPForDirective(const OMPForDirective *S) {
423   VisitOMPLoopDirective(S);
424 }
425 
426 void StmtProfiler::VisitOMPForSimdDirective(const OMPForSimdDirective *S) {
427   VisitOMPLoopDirective(S);
428 }
429 
430 void StmtProfiler::VisitOMPSectionsDirective(const OMPSectionsDirective *S) {
431   VisitOMPExecutableDirective(S);
432 }
433 
434 void StmtProfiler::VisitOMPSectionDirective(const OMPSectionDirective *S) {
435   VisitOMPExecutableDirective(S);
436 }
437 
438 void StmtProfiler::VisitOMPSingleDirective(const OMPSingleDirective *S) {
439   VisitOMPExecutableDirective(S);
440 }
441 
442 void StmtProfiler::VisitOMPMasterDirective(const OMPMasterDirective *S) {
443   VisitOMPExecutableDirective(S);
444 }
445 
446 void StmtProfiler::VisitOMPCriticalDirective(const OMPCriticalDirective *S) {
447   VisitOMPExecutableDirective(S);
448   VisitName(S->getDirectiveName().getName());
449 }
450 
451 void
452 StmtProfiler::VisitOMPParallelForDirective(const OMPParallelForDirective *S) {
453   VisitOMPLoopDirective(S);
454 }
455 
456 void StmtProfiler::VisitOMPParallelForSimdDirective(
457     const OMPParallelForSimdDirective *S) {
458   VisitOMPLoopDirective(S);
459 }
460 
461 void StmtProfiler::VisitOMPParallelSectionsDirective(
462     const OMPParallelSectionsDirective *S) {
463   VisitOMPExecutableDirective(S);
464 }
465 
466 void StmtProfiler::VisitOMPTaskDirective(const OMPTaskDirective *S) {
467   VisitOMPExecutableDirective(S);
468 }
469 
470 void StmtProfiler::VisitOMPTaskyieldDirective(const OMPTaskyieldDirective *S) {
471   VisitOMPExecutableDirective(S);
472 }
473 
474 void StmtProfiler::VisitOMPBarrierDirective(const OMPBarrierDirective *S) {
475   VisitOMPExecutableDirective(S);
476 }
477 
478 void StmtProfiler::VisitOMPTaskwaitDirective(const OMPTaskwaitDirective *S) {
479   VisitOMPExecutableDirective(S);
480 }
481 
482 void StmtProfiler::VisitOMPFlushDirective(const OMPFlushDirective *S) {
483   VisitOMPExecutableDirective(S);
484 }
485 
486 void StmtProfiler::VisitOMPOrderedDirective(const OMPOrderedDirective *S) {
487   VisitOMPExecutableDirective(S);
488 }
489 
490 void StmtProfiler::VisitOMPAtomicDirective(const OMPAtomicDirective *S) {
491   VisitOMPExecutableDirective(S);
492 }
493 
494 void StmtProfiler::VisitOMPTargetDirective(const OMPTargetDirective *S) {
495   VisitOMPExecutableDirective(S);
496 }
497 
498 void StmtProfiler::VisitOMPTeamsDirective(const OMPTeamsDirective *S) {
499   VisitOMPExecutableDirective(S);
500 }
501 
502 void StmtProfiler::VisitExpr(const Expr *S) {
503   VisitStmt(S);
504 }
505 
506 void StmtProfiler::VisitDeclRefExpr(const DeclRefExpr *S) {
507   VisitExpr(S);
508   if (!Canonical)
509     VisitNestedNameSpecifier(S->getQualifier());
510   VisitDecl(S->getDecl());
511   if (!Canonical)
512     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
513 }
514 
515 void StmtProfiler::VisitPredefinedExpr(const PredefinedExpr *S) {
516   VisitExpr(S);
517   ID.AddInteger(S->getIdentType());
518 }
519 
520 void StmtProfiler::VisitIntegerLiteral(const IntegerLiteral *S) {
521   VisitExpr(S);
522   S->getValue().Profile(ID);
523   ID.AddInteger(S->getType()->castAs<BuiltinType>()->getKind());
524 }
525 
526 void StmtProfiler::VisitCharacterLiteral(const CharacterLiteral *S) {
527   VisitExpr(S);
528   ID.AddInteger(S->getKind());
529   ID.AddInteger(S->getValue());
530 }
531 
532 void StmtProfiler::VisitFloatingLiteral(const FloatingLiteral *S) {
533   VisitExpr(S);
534   S->getValue().Profile(ID);
535   ID.AddBoolean(S->isExact());
536   ID.AddInteger(S->getType()->castAs<BuiltinType>()->getKind());
537 }
538 
539 void StmtProfiler::VisitImaginaryLiteral(const ImaginaryLiteral *S) {
540   VisitExpr(S);
541 }
542 
543 void StmtProfiler::VisitStringLiteral(const StringLiteral *S) {
544   VisitExpr(S);
545   ID.AddString(S->getBytes());
546   ID.AddInteger(S->getKind());
547 }
548 
549 void StmtProfiler::VisitParenExpr(const ParenExpr *S) {
550   VisitExpr(S);
551 }
552 
553 void StmtProfiler::VisitParenListExpr(const ParenListExpr *S) {
554   VisitExpr(S);
555 }
556 
557 void StmtProfiler::VisitUnaryOperator(const UnaryOperator *S) {
558   VisitExpr(S);
559   ID.AddInteger(S->getOpcode());
560 }
561 
562 void StmtProfiler::VisitOffsetOfExpr(const OffsetOfExpr *S) {
563   VisitType(S->getTypeSourceInfo()->getType());
564   unsigned n = S->getNumComponents();
565   for (unsigned i = 0; i < n; ++i) {
566     const OffsetOfExpr::OffsetOfNode& ON = S->getComponent(i);
567     ID.AddInteger(ON.getKind());
568     switch (ON.getKind()) {
569     case OffsetOfExpr::OffsetOfNode::Array:
570       // Expressions handled below.
571       break;
572 
573     case OffsetOfExpr::OffsetOfNode::Field:
574       VisitDecl(ON.getField());
575       break;
576 
577     case OffsetOfExpr::OffsetOfNode::Identifier:
578       ID.AddPointer(ON.getFieldName());
579       break;
580 
581     case OffsetOfExpr::OffsetOfNode::Base:
582       // These nodes are implicit, and therefore don't need profiling.
583       break;
584     }
585   }
586 
587   VisitExpr(S);
588 }
589 
590 void
591 StmtProfiler::VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *S) {
592   VisitExpr(S);
593   ID.AddInteger(S->getKind());
594   if (S->isArgumentType())
595     VisitType(S->getArgumentType());
596 }
597 
598 void StmtProfiler::VisitArraySubscriptExpr(const ArraySubscriptExpr *S) {
599   VisitExpr(S);
600 }
601 
602 void StmtProfiler::VisitCallExpr(const CallExpr *S) {
603   VisitExpr(S);
604 }
605 
606 void StmtProfiler::VisitMemberExpr(const MemberExpr *S) {
607   VisitExpr(S);
608   VisitDecl(S->getMemberDecl());
609   if (!Canonical)
610     VisitNestedNameSpecifier(S->getQualifier());
611   ID.AddBoolean(S->isArrow());
612 }
613 
614 void StmtProfiler::VisitCompoundLiteralExpr(const CompoundLiteralExpr *S) {
615   VisitExpr(S);
616   ID.AddBoolean(S->isFileScope());
617 }
618 
619 void StmtProfiler::VisitCastExpr(const CastExpr *S) {
620   VisitExpr(S);
621 }
622 
623 void StmtProfiler::VisitImplicitCastExpr(const ImplicitCastExpr *S) {
624   VisitCastExpr(S);
625   ID.AddInteger(S->getValueKind());
626 }
627 
628 void StmtProfiler::VisitExplicitCastExpr(const ExplicitCastExpr *S) {
629   VisitCastExpr(S);
630   VisitType(S->getTypeAsWritten());
631 }
632 
633 void StmtProfiler::VisitCStyleCastExpr(const CStyleCastExpr *S) {
634   VisitExplicitCastExpr(S);
635 }
636 
637 void StmtProfiler::VisitBinaryOperator(const BinaryOperator *S) {
638   VisitExpr(S);
639   ID.AddInteger(S->getOpcode());
640 }
641 
642 void
643 StmtProfiler::VisitCompoundAssignOperator(const CompoundAssignOperator *S) {
644   VisitBinaryOperator(S);
645 }
646 
647 void StmtProfiler::VisitConditionalOperator(const ConditionalOperator *S) {
648   VisitExpr(S);
649 }
650 
651 void StmtProfiler::VisitBinaryConditionalOperator(
652     const BinaryConditionalOperator *S) {
653   VisitExpr(S);
654 }
655 
656 void StmtProfiler::VisitAddrLabelExpr(const AddrLabelExpr *S) {
657   VisitExpr(S);
658   VisitDecl(S->getLabel());
659 }
660 
661 void StmtProfiler::VisitStmtExpr(const StmtExpr *S) {
662   VisitExpr(S);
663 }
664 
665 void StmtProfiler::VisitShuffleVectorExpr(const ShuffleVectorExpr *S) {
666   VisitExpr(S);
667 }
668 
669 void StmtProfiler::VisitConvertVectorExpr(const ConvertVectorExpr *S) {
670   VisitExpr(S);
671 }
672 
673 void StmtProfiler::VisitChooseExpr(const ChooseExpr *S) {
674   VisitExpr(S);
675 }
676 
677 void StmtProfiler::VisitGNUNullExpr(const GNUNullExpr *S) {
678   VisitExpr(S);
679 }
680 
681 void StmtProfiler::VisitVAArgExpr(const VAArgExpr *S) {
682   VisitExpr(S);
683 }
684 
685 void StmtProfiler::VisitInitListExpr(const InitListExpr *S) {
686   if (S->getSyntacticForm()) {
687     VisitInitListExpr(S->getSyntacticForm());
688     return;
689   }
690 
691   VisitExpr(S);
692 }
693 
694 void StmtProfiler::VisitDesignatedInitExpr(const DesignatedInitExpr *S) {
695   VisitExpr(S);
696   ID.AddBoolean(S->usesGNUSyntax());
697   for (DesignatedInitExpr::const_designators_iterator D =
698          S->designators_begin(), DEnd = S->designators_end();
699        D != DEnd; ++D) {
700     if (D->isFieldDesignator()) {
701       ID.AddInteger(0);
702       VisitName(D->getFieldName());
703       continue;
704     }
705 
706     if (D->isArrayDesignator()) {
707       ID.AddInteger(1);
708     } else {
709       assert(D->isArrayRangeDesignator());
710       ID.AddInteger(2);
711     }
712     ID.AddInteger(D->getFirstExprIndex());
713   }
714 }
715 
716 void StmtProfiler::VisitImplicitValueInitExpr(const ImplicitValueInitExpr *S) {
717   VisitExpr(S);
718 }
719 
720 void StmtProfiler::VisitExtVectorElementExpr(const ExtVectorElementExpr *S) {
721   VisitExpr(S);
722   VisitName(&S->getAccessor());
723 }
724 
725 void StmtProfiler::VisitBlockExpr(const BlockExpr *S) {
726   VisitExpr(S);
727   VisitDecl(S->getBlockDecl());
728 }
729 
730 void StmtProfiler::VisitGenericSelectionExpr(const GenericSelectionExpr *S) {
731   VisitExpr(S);
732   for (unsigned i = 0; i != S->getNumAssocs(); ++i) {
733     QualType T = S->getAssocType(i);
734     if (T.isNull())
735       ID.AddPointer(nullptr);
736     else
737       VisitType(T);
738     VisitExpr(S->getAssocExpr(i));
739   }
740 }
741 
742 void StmtProfiler::VisitPseudoObjectExpr(const PseudoObjectExpr *S) {
743   VisitExpr(S);
744   for (PseudoObjectExpr::const_semantics_iterator
745          i = S->semantics_begin(), e = S->semantics_end(); i != e; ++i)
746     // Normally, we would not profile the source expressions of OVEs.
747     if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(*i))
748       Visit(OVE->getSourceExpr());
749 }
750 
751 void StmtProfiler::VisitAtomicExpr(const AtomicExpr *S) {
752   VisitExpr(S);
753   ID.AddInteger(S->getOp());
754 }
755 
756 static Stmt::StmtClass DecodeOperatorCall(const CXXOperatorCallExpr *S,
757                                           UnaryOperatorKind &UnaryOp,
758                                           BinaryOperatorKind &BinaryOp) {
759   switch (S->getOperator()) {
760   case OO_None:
761   case OO_New:
762   case OO_Delete:
763   case OO_Array_New:
764   case OO_Array_Delete:
765   case OO_Arrow:
766   case OO_Call:
767   case OO_Conditional:
768   case NUM_OVERLOADED_OPERATORS:
769     llvm_unreachable("Invalid operator call kind");
770 
771   case OO_Plus:
772     if (S->getNumArgs() == 1) {
773       UnaryOp = UO_Plus;
774       return Stmt::UnaryOperatorClass;
775     }
776 
777     BinaryOp = BO_Add;
778     return Stmt::BinaryOperatorClass;
779 
780   case OO_Minus:
781     if (S->getNumArgs() == 1) {
782       UnaryOp = UO_Minus;
783       return Stmt::UnaryOperatorClass;
784     }
785 
786     BinaryOp = BO_Sub;
787     return Stmt::BinaryOperatorClass;
788 
789   case OO_Star:
790     if (S->getNumArgs() == 1) {
791       UnaryOp = UO_Deref;
792       return Stmt::UnaryOperatorClass;
793     }
794 
795     BinaryOp = BO_Mul;
796     return Stmt::BinaryOperatorClass;
797 
798   case OO_Slash:
799     BinaryOp = BO_Div;
800     return Stmt::BinaryOperatorClass;
801 
802   case OO_Percent:
803     BinaryOp = BO_Rem;
804     return Stmt::BinaryOperatorClass;
805 
806   case OO_Caret:
807     BinaryOp = BO_Xor;
808     return Stmt::BinaryOperatorClass;
809 
810   case OO_Amp:
811     if (S->getNumArgs() == 1) {
812       UnaryOp = UO_AddrOf;
813       return Stmt::UnaryOperatorClass;
814     }
815 
816     BinaryOp = BO_And;
817     return Stmt::BinaryOperatorClass;
818 
819   case OO_Pipe:
820     BinaryOp = BO_Or;
821     return Stmt::BinaryOperatorClass;
822 
823   case OO_Tilde:
824     UnaryOp = UO_Not;
825     return Stmt::UnaryOperatorClass;
826 
827   case OO_Exclaim:
828     UnaryOp = UO_LNot;
829     return Stmt::UnaryOperatorClass;
830 
831   case OO_Equal:
832     BinaryOp = BO_Assign;
833     return Stmt::BinaryOperatorClass;
834 
835   case OO_Less:
836     BinaryOp = BO_LT;
837     return Stmt::BinaryOperatorClass;
838 
839   case OO_Greater:
840     BinaryOp = BO_GT;
841     return Stmt::BinaryOperatorClass;
842 
843   case OO_PlusEqual:
844     BinaryOp = BO_AddAssign;
845     return Stmt::CompoundAssignOperatorClass;
846 
847   case OO_MinusEqual:
848     BinaryOp = BO_SubAssign;
849     return Stmt::CompoundAssignOperatorClass;
850 
851   case OO_StarEqual:
852     BinaryOp = BO_MulAssign;
853     return Stmt::CompoundAssignOperatorClass;
854 
855   case OO_SlashEqual:
856     BinaryOp = BO_DivAssign;
857     return Stmt::CompoundAssignOperatorClass;
858 
859   case OO_PercentEqual:
860     BinaryOp = BO_RemAssign;
861     return Stmt::CompoundAssignOperatorClass;
862 
863   case OO_CaretEqual:
864     BinaryOp = BO_XorAssign;
865     return Stmt::CompoundAssignOperatorClass;
866 
867   case OO_AmpEqual:
868     BinaryOp = BO_AndAssign;
869     return Stmt::CompoundAssignOperatorClass;
870 
871   case OO_PipeEqual:
872     BinaryOp = BO_OrAssign;
873     return Stmt::CompoundAssignOperatorClass;
874 
875   case OO_LessLess:
876     BinaryOp = BO_Shl;
877     return Stmt::BinaryOperatorClass;
878 
879   case OO_GreaterGreater:
880     BinaryOp = BO_Shr;
881     return Stmt::BinaryOperatorClass;
882 
883   case OO_LessLessEqual:
884     BinaryOp = BO_ShlAssign;
885     return Stmt::CompoundAssignOperatorClass;
886 
887   case OO_GreaterGreaterEqual:
888     BinaryOp = BO_ShrAssign;
889     return Stmt::CompoundAssignOperatorClass;
890 
891   case OO_EqualEqual:
892     BinaryOp = BO_EQ;
893     return Stmt::BinaryOperatorClass;
894 
895   case OO_ExclaimEqual:
896     BinaryOp = BO_NE;
897     return Stmt::BinaryOperatorClass;
898 
899   case OO_LessEqual:
900     BinaryOp = BO_LE;
901     return Stmt::BinaryOperatorClass;
902 
903   case OO_GreaterEqual:
904     BinaryOp = BO_GE;
905     return Stmt::BinaryOperatorClass;
906 
907   case OO_AmpAmp:
908     BinaryOp = BO_LAnd;
909     return Stmt::BinaryOperatorClass;
910 
911   case OO_PipePipe:
912     BinaryOp = BO_LOr;
913     return Stmt::BinaryOperatorClass;
914 
915   case OO_PlusPlus:
916     UnaryOp = S->getNumArgs() == 1? UO_PreInc
917                                   : UO_PostInc;
918     return Stmt::UnaryOperatorClass;
919 
920   case OO_MinusMinus:
921     UnaryOp = S->getNumArgs() == 1? UO_PreDec
922                                   : UO_PostDec;
923     return Stmt::UnaryOperatorClass;
924 
925   case OO_Comma:
926     BinaryOp = BO_Comma;
927     return Stmt::BinaryOperatorClass;
928 
929 
930   case OO_ArrowStar:
931     BinaryOp = BO_PtrMemI;
932     return Stmt::BinaryOperatorClass;
933 
934   case OO_Subscript:
935     return Stmt::ArraySubscriptExprClass;
936   }
937 
938   llvm_unreachable("Invalid overloaded operator expression");
939 }
940 
941 
942 void StmtProfiler::VisitCXXOperatorCallExpr(const CXXOperatorCallExpr *S) {
943   if (S->isTypeDependent()) {
944     // Type-dependent operator calls are profiled like their underlying
945     // syntactic operator.
946     UnaryOperatorKind UnaryOp = UO_Extension;
947     BinaryOperatorKind BinaryOp = BO_Comma;
948     Stmt::StmtClass SC = DecodeOperatorCall(S, UnaryOp, BinaryOp);
949 
950     ID.AddInteger(SC);
951     for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
952       Visit(S->getArg(I));
953     if (SC == Stmt::UnaryOperatorClass)
954       ID.AddInteger(UnaryOp);
955     else if (SC == Stmt::BinaryOperatorClass ||
956              SC == Stmt::CompoundAssignOperatorClass)
957       ID.AddInteger(BinaryOp);
958     else
959       assert(SC == Stmt::ArraySubscriptExprClass);
960 
961     return;
962   }
963 
964   VisitCallExpr(S);
965   ID.AddInteger(S->getOperator());
966 }
967 
968 void StmtProfiler::VisitCXXMemberCallExpr(const CXXMemberCallExpr *S) {
969   VisitCallExpr(S);
970 }
971 
972 void StmtProfiler::VisitCUDAKernelCallExpr(const CUDAKernelCallExpr *S) {
973   VisitCallExpr(S);
974 }
975 
976 void StmtProfiler::VisitAsTypeExpr(const AsTypeExpr *S) {
977   VisitExpr(S);
978 }
979 
980 void StmtProfiler::VisitCXXNamedCastExpr(const CXXNamedCastExpr *S) {
981   VisitExplicitCastExpr(S);
982 }
983 
984 void StmtProfiler::VisitCXXStaticCastExpr(const CXXStaticCastExpr *S) {
985   VisitCXXNamedCastExpr(S);
986 }
987 
988 void StmtProfiler::VisitCXXDynamicCastExpr(const CXXDynamicCastExpr *S) {
989   VisitCXXNamedCastExpr(S);
990 }
991 
992 void
993 StmtProfiler::VisitCXXReinterpretCastExpr(const CXXReinterpretCastExpr *S) {
994   VisitCXXNamedCastExpr(S);
995 }
996 
997 void StmtProfiler::VisitCXXConstCastExpr(const CXXConstCastExpr *S) {
998   VisitCXXNamedCastExpr(S);
999 }
1000 
1001 void StmtProfiler::VisitUserDefinedLiteral(const UserDefinedLiteral *S) {
1002   VisitCallExpr(S);
1003 }
1004 
1005 void StmtProfiler::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *S) {
1006   VisitExpr(S);
1007   ID.AddBoolean(S->getValue());
1008 }
1009 
1010 void StmtProfiler::VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *S) {
1011   VisitExpr(S);
1012 }
1013 
1014 void StmtProfiler::VisitCXXStdInitializerListExpr(
1015     const CXXStdInitializerListExpr *S) {
1016   VisitExpr(S);
1017 }
1018 
1019 void StmtProfiler::VisitCXXTypeidExpr(const CXXTypeidExpr *S) {
1020   VisitExpr(S);
1021   if (S->isTypeOperand())
1022     VisitType(S->getTypeOperandSourceInfo()->getType());
1023 }
1024 
1025 void StmtProfiler::VisitCXXUuidofExpr(const CXXUuidofExpr *S) {
1026   VisitExpr(S);
1027   if (S->isTypeOperand())
1028     VisitType(S->getTypeOperandSourceInfo()->getType());
1029 }
1030 
1031 void StmtProfiler::VisitMSPropertyRefExpr(const MSPropertyRefExpr *S) {
1032   VisitExpr(S);
1033   VisitDecl(S->getPropertyDecl());
1034 }
1035 
1036 void StmtProfiler::VisitCXXThisExpr(const CXXThisExpr *S) {
1037   VisitExpr(S);
1038   ID.AddBoolean(S->isImplicit());
1039 }
1040 
1041 void StmtProfiler::VisitCXXThrowExpr(const CXXThrowExpr *S) {
1042   VisitExpr(S);
1043 }
1044 
1045 void StmtProfiler::VisitCXXDefaultArgExpr(const CXXDefaultArgExpr *S) {
1046   VisitExpr(S);
1047   VisitDecl(S->getParam());
1048 }
1049 
1050 void StmtProfiler::VisitCXXDefaultInitExpr(const CXXDefaultInitExpr *S) {
1051   VisitExpr(S);
1052   VisitDecl(S->getField());
1053 }
1054 
1055 void StmtProfiler::VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *S) {
1056   VisitExpr(S);
1057   VisitDecl(
1058          const_cast<CXXDestructorDecl *>(S->getTemporary()->getDestructor()));
1059 }
1060 
1061 void StmtProfiler::VisitCXXConstructExpr(const CXXConstructExpr *S) {
1062   VisitExpr(S);
1063   VisitDecl(S->getConstructor());
1064   ID.AddBoolean(S->isElidable());
1065 }
1066 
1067 void StmtProfiler::VisitCXXFunctionalCastExpr(const CXXFunctionalCastExpr *S) {
1068   VisitExplicitCastExpr(S);
1069 }
1070 
1071 void
1072 StmtProfiler::VisitCXXTemporaryObjectExpr(const CXXTemporaryObjectExpr *S) {
1073   VisitCXXConstructExpr(S);
1074 }
1075 
1076 void
1077 StmtProfiler::VisitLambdaExpr(const LambdaExpr *S) {
1078   VisitExpr(S);
1079   for (LambdaExpr::capture_iterator C = S->explicit_capture_begin(),
1080                                  CEnd = S->explicit_capture_end();
1081        C != CEnd; ++C) {
1082     ID.AddInteger(C->getCaptureKind());
1083     switch (C->getCaptureKind()) {
1084     case LCK_This:
1085       break;
1086     case LCK_ByRef:
1087     case LCK_ByCopy:
1088       VisitDecl(C->getCapturedVar());
1089       ID.AddBoolean(C->isPackExpansion());
1090       break;
1091     case LCK_VLAType:
1092       llvm_unreachable("VLA type in explicit captures.");
1093     }
1094   }
1095   // Note: If we actually needed to be able to match lambda
1096   // expressions, we would have to consider parameters and return type
1097   // here, among other things.
1098   VisitStmt(S->getBody());
1099 }
1100 
1101 void
1102 StmtProfiler::VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *S) {
1103   VisitExpr(S);
1104 }
1105 
1106 void StmtProfiler::VisitCXXDeleteExpr(const CXXDeleteExpr *S) {
1107   VisitExpr(S);
1108   ID.AddBoolean(S->isGlobalDelete());
1109   ID.AddBoolean(S->isArrayForm());
1110   VisitDecl(S->getOperatorDelete());
1111 }
1112 
1113 
1114 void StmtProfiler::VisitCXXNewExpr(const CXXNewExpr *S) {
1115   VisitExpr(S);
1116   VisitType(S->getAllocatedType());
1117   VisitDecl(S->getOperatorNew());
1118   VisitDecl(S->getOperatorDelete());
1119   ID.AddBoolean(S->isArray());
1120   ID.AddInteger(S->getNumPlacementArgs());
1121   ID.AddBoolean(S->isGlobalNew());
1122   ID.AddBoolean(S->isParenTypeId());
1123   ID.AddInteger(S->getInitializationStyle());
1124 }
1125 
1126 void
1127 StmtProfiler::VisitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *S) {
1128   VisitExpr(S);
1129   ID.AddBoolean(S->isArrow());
1130   VisitNestedNameSpecifier(S->getQualifier());
1131   ID.AddBoolean(S->getScopeTypeInfo() != nullptr);
1132   if (S->getScopeTypeInfo())
1133     VisitType(S->getScopeTypeInfo()->getType());
1134   ID.AddBoolean(S->getDestroyedTypeInfo() != nullptr);
1135   if (S->getDestroyedTypeInfo())
1136     VisitType(S->getDestroyedType());
1137   else
1138     ID.AddPointer(S->getDestroyedTypeIdentifier());
1139 }
1140 
1141 void StmtProfiler::VisitOverloadExpr(const OverloadExpr *S) {
1142   VisitExpr(S);
1143   VisitNestedNameSpecifier(S->getQualifier());
1144   VisitName(S->getName());
1145   ID.AddBoolean(S->hasExplicitTemplateArgs());
1146   if (S->hasExplicitTemplateArgs())
1147     VisitTemplateArguments(S->getExplicitTemplateArgs().getTemplateArgs(),
1148                            S->getExplicitTemplateArgs().NumTemplateArgs);
1149 }
1150 
1151 void
1152 StmtProfiler::VisitUnresolvedLookupExpr(const UnresolvedLookupExpr *S) {
1153   VisitOverloadExpr(S);
1154 }
1155 
1156 void StmtProfiler::VisitTypeTraitExpr(const TypeTraitExpr *S) {
1157   VisitExpr(S);
1158   ID.AddInteger(S->getTrait());
1159   ID.AddInteger(S->getNumArgs());
1160   for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
1161     VisitType(S->getArg(I)->getType());
1162 }
1163 
1164 void StmtProfiler::VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *S) {
1165   VisitExpr(S);
1166   ID.AddInteger(S->getTrait());
1167   VisitType(S->getQueriedType());
1168 }
1169 
1170 void StmtProfiler::VisitExpressionTraitExpr(const ExpressionTraitExpr *S) {
1171   VisitExpr(S);
1172   ID.AddInteger(S->getTrait());
1173   VisitExpr(S->getQueriedExpression());
1174 }
1175 
1176 void StmtProfiler::VisitDependentScopeDeclRefExpr(
1177     const DependentScopeDeclRefExpr *S) {
1178   VisitExpr(S);
1179   VisitName(S->getDeclName());
1180   VisitNestedNameSpecifier(S->getQualifier());
1181   ID.AddBoolean(S->hasExplicitTemplateArgs());
1182   if (S->hasExplicitTemplateArgs())
1183     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1184 }
1185 
1186 void StmtProfiler::VisitExprWithCleanups(const ExprWithCleanups *S) {
1187   VisitExpr(S);
1188 }
1189 
1190 void StmtProfiler::VisitCXXUnresolvedConstructExpr(
1191     const CXXUnresolvedConstructExpr *S) {
1192   VisitExpr(S);
1193   VisitType(S->getTypeAsWritten());
1194 }
1195 
1196 void StmtProfiler::VisitCXXDependentScopeMemberExpr(
1197     const CXXDependentScopeMemberExpr *S) {
1198   ID.AddBoolean(S->isImplicitAccess());
1199   if (!S->isImplicitAccess()) {
1200     VisitExpr(S);
1201     ID.AddBoolean(S->isArrow());
1202   }
1203   VisitNestedNameSpecifier(S->getQualifier());
1204   VisitName(S->getMember());
1205   ID.AddBoolean(S->hasExplicitTemplateArgs());
1206   if (S->hasExplicitTemplateArgs())
1207     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1208 }
1209 
1210 void StmtProfiler::VisitUnresolvedMemberExpr(const UnresolvedMemberExpr *S) {
1211   ID.AddBoolean(S->isImplicitAccess());
1212   if (!S->isImplicitAccess()) {
1213     VisitExpr(S);
1214     ID.AddBoolean(S->isArrow());
1215   }
1216   VisitNestedNameSpecifier(S->getQualifier());
1217   VisitName(S->getMemberName());
1218   ID.AddBoolean(S->hasExplicitTemplateArgs());
1219   if (S->hasExplicitTemplateArgs())
1220     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1221 }
1222 
1223 void StmtProfiler::VisitCXXNoexceptExpr(const CXXNoexceptExpr *S) {
1224   VisitExpr(S);
1225 }
1226 
1227 void StmtProfiler::VisitPackExpansionExpr(const PackExpansionExpr *S) {
1228   VisitExpr(S);
1229 }
1230 
1231 void StmtProfiler::VisitSizeOfPackExpr(const SizeOfPackExpr *S) {
1232   VisitExpr(S);
1233   VisitDecl(S->getPack());
1234 }
1235 
1236 void StmtProfiler::VisitSubstNonTypeTemplateParmPackExpr(
1237     const SubstNonTypeTemplateParmPackExpr *S) {
1238   VisitExpr(S);
1239   VisitDecl(S->getParameterPack());
1240   VisitTemplateArgument(S->getArgumentPack());
1241 }
1242 
1243 void StmtProfiler::VisitSubstNonTypeTemplateParmExpr(
1244     const SubstNonTypeTemplateParmExpr *E) {
1245   // Profile exactly as the replacement expression.
1246   Visit(E->getReplacement());
1247 }
1248 
1249 void StmtProfiler::VisitFunctionParmPackExpr(const FunctionParmPackExpr *S) {
1250   VisitExpr(S);
1251   VisitDecl(S->getParameterPack());
1252   ID.AddInteger(S->getNumExpansions());
1253   for (FunctionParmPackExpr::iterator I = S->begin(), E = S->end(); I != E; ++I)
1254     VisitDecl(*I);
1255 }
1256 
1257 void StmtProfiler::VisitMaterializeTemporaryExpr(
1258                                            const MaterializeTemporaryExpr *S) {
1259   VisitExpr(S);
1260 }
1261 
1262 void StmtProfiler::VisitCXXFoldExpr(const CXXFoldExpr *S) {
1263   VisitExpr(S);
1264   ID.AddInteger(S->getOperator());
1265 }
1266 
1267 void StmtProfiler::VisitOpaqueValueExpr(const OpaqueValueExpr *E) {
1268   VisitExpr(E);
1269 }
1270 
1271 void StmtProfiler::VisitTypoExpr(const TypoExpr *E) {
1272   VisitExpr(E);
1273 }
1274 
1275 void StmtProfiler::VisitObjCStringLiteral(const ObjCStringLiteral *S) {
1276   VisitExpr(S);
1277 }
1278 
1279 void StmtProfiler::VisitObjCBoxedExpr(const ObjCBoxedExpr *E) {
1280   VisitExpr(E);
1281 }
1282 
1283 void StmtProfiler::VisitObjCArrayLiteral(const ObjCArrayLiteral *E) {
1284   VisitExpr(E);
1285 }
1286 
1287 void StmtProfiler::VisitObjCDictionaryLiteral(const ObjCDictionaryLiteral *E) {
1288   VisitExpr(E);
1289 }
1290 
1291 void StmtProfiler::VisitObjCEncodeExpr(const ObjCEncodeExpr *S) {
1292   VisitExpr(S);
1293   VisitType(S->getEncodedType());
1294 }
1295 
1296 void StmtProfiler::VisitObjCSelectorExpr(const ObjCSelectorExpr *S) {
1297   VisitExpr(S);
1298   VisitName(S->getSelector());
1299 }
1300 
1301 void StmtProfiler::VisitObjCProtocolExpr(const ObjCProtocolExpr *S) {
1302   VisitExpr(S);
1303   VisitDecl(S->getProtocol());
1304 }
1305 
1306 void StmtProfiler::VisitObjCIvarRefExpr(const ObjCIvarRefExpr *S) {
1307   VisitExpr(S);
1308   VisitDecl(S->getDecl());
1309   ID.AddBoolean(S->isArrow());
1310   ID.AddBoolean(S->isFreeIvar());
1311 }
1312 
1313 void StmtProfiler::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *S) {
1314   VisitExpr(S);
1315   if (S->isImplicitProperty()) {
1316     VisitDecl(S->getImplicitPropertyGetter());
1317     VisitDecl(S->getImplicitPropertySetter());
1318   } else {
1319     VisitDecl(S->getExplicitProperty());
1320   }
1321   if (S->isSuperReceiver()) {
1322     ID.AddBoolean(S->isSuperReceiver());
1323     VisitType(S->getSuperReceiverType());
1324   }
1325 }
1326 
1327 void StmtProfiler::VisitObjCSubscriptRefExpr(const ObjCSubscriptRefExpr *S) {
1328   VisitExpr(S);
1329   VisitDecl(S->getAtIndexMethodDecl());
1330   VisitDecl(S->setAtIndexMethodDecl());
1331 }
1332 
1333 void StmtProfiler::VisitObjCMessageExpr(const ObjCMessageExpr *S) {
1334   VisitExpr(S);
1335   VisitName(S->getSelector());
1336   VisitDecl(S->getMethodDecl());
1337 }
1338 
1339 void StmtProfiler::VisitObjCIsaExpr(const ObjCIsaExpr *S) {
1340   VisitExpr(S);
1341   ID.AddBoolean(S->isArrow());
1342 }
1343 
1344 void StmtProfiler::VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *S) {
1345   VisitExpr(S);
1346   ID.AddBoolean(S->getValue());
1347 }
1348 
1349 void StmtProfiler::VisitObjCIndirectCopyRestoreExpr(
1350     const ObjCIndirectCopyRestoreExpr *S) {
1351   VisitExpr(S);
1352   ID.AddBoolean(S->shouldCopy());
1353 }
1354 
1355 void StmtProfiler::VisitObjCBridgedCastExpr(const ObjCBridgedCastExpr *S) {
1356   VisitExplicitCastExpr(S);
1357   ID.AddBoolean(S->getBridgeKind());
1358 }
1359 
1360 void StmtProfiler::VisitDecl(const Decl *D) {
1361   ID.AddInteger(D? D->getKind() : 0);
1362 
1363   if (Canonical && D) {
1364     if (const NonTypeTemplateParmDecl *NTTP =
1365           dyn_cast<NonTypeTemplateParmDecl>(D)) {
1366       ID.AddInteger(NTTP->getDepth());
1367       ID.AddInteger(NTTP->getIndex());
1368       ID.AddBoolean(NTTP->isParameterPack());
1369       VisitType(NTTP->getType());
1370       return;
1371     }
1372 
1373     if (const ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D)) {
1374       // The Itanium C++ ABI uses the type, scope depth, and scope
1375       // index of a parameter when mangling expressions that involve
1376       // function parameters, so we will use the parameter's type for
1377       // establishing function parameter identity. That way, our
1378       // definition of "equivalent" (per C++ [temp.over.link]) is at
1379       // least as strong as the definition of "equivalent" used for
1380       // name mangling.
1381       VisitType(Parm->getType());
1382       ID.AddInteger(Parm->getFunctionScopeDepth());
1383       ID.AddInteger(Parm->getFunctionScopeIndex());
1384       return;
1385     }
1386 
1387     if (const TemplateTypeParmDecl *TTP =
1388           dyn_cast<TemplateTypeParmDecl>(D)) {
1389       ID.AddInteger(TTP->getDepth());
1390       ID.AddInteger(TTP->getIndex());
1391       ID.AddBoolean(TTP->isParameterPack());
1392       return;
1393     }
1394 
1395     if (const TemplateTemplateParmDecl *TTP =
1396           dyn_cast<TemplateTemplateParmDecl>(D)) {
1397       ID.AddInteger(TTP->getDepth());
1398       ID.AddInteger(TTP->getIndex());
1399       ID.AddBoolean(TTP->isParameterPack());
1400       return;
1401     }
1402   }
1403 
1404   ID.AddPointer(D? D->getCanonicalDecl() : nullptr);
1405 }
1406 
1407 void StmtProfiler::VisitType(QualType T) {
1408   if (Canonical)
1409     T = Context.getCanonicalType(T);
1410 
1411   ID.AddPointer(T.getAsOpaquePtr());
1412 }
1413 
1414 void StmtProfiler::VisitName(DeclarationName Name) {
1415   ID.AddPointer(Name.getAsOpaquePtr());
1416 }
1417 
1418 void StmtProfiler::VisitNestedNameSpecifier(NestedNameSpecifier *NNS) {
1419   if (Canonical)
1420     NNS = Context.getCanonicalNestedNameSpecifier(NNS);
1421   ID.AddPointer(NNS);
1422 }
1423 
1424 void StmtProfiler::VisitTemplateName(TemplateName Name) {
1425   if (Canonical)
1426     Name = Context.getCanonicalTemplateName(Name);
1427 
1428   Name.Profile(ID);
1429 }
1430 
1431 void StmtProfiler::VisitTemplateArguments(const TemplateArgumentLoc *Args,
1432                                           unsigned NumArgs) {
1433   ID.AddInteger(NumArgs);
1434   for (unsigned I = 0; I != NumArgs; ++I)
1435     VisitTemplateArgument(Args[I].getArgument());
1436 }
1437 
1438 void StmtProfiler::VisitTemplateArgument(const TemplateArgument &Arg) {
1439   // Mostly repetitive with TemplateArgument::Profile!
1440   ID.AddInteger(Arg.getKind());
1441   switch (Arg.getKind()) {
1442   case TemplateArgument::Null:
1443     break;
1444 
1445   case TemplateArgument::Type:
1446     VisitType(Arg.getAsType());
1447     break;
1448 
1449   case TemplateArgument::Template:
1450   case TemplateArgument::TemplateExpansion:
1451     VisitTemplateName(Arg.getAsTemplateOrTemplatePattern());
1452     break;
1453 
1454   case TemplateArgument::Declaration:
1455     VisitDecl(Arg.getAsDecl());
1456     break;
1457 
1458   case TemplateArgument::NullPtr:
1459     VisitType(Arg.getNullPtrType());
1460     break;
1461 
1462   case TemplateArgument::Integral:
1463     Arg.getAsIntegral().Profile(ID);
1464     VisitType(Arg.getIntegralType());
1465     break;
1466 
1467   case TemplateArgument::Expression:
1468     Visit(Arg.getAsExpr());
1469     break;
1470 
1471   case TemplateArgument::Pack:
1472     for (const auto &P : Arg.pack_elements())
1473       VisitTemplateArgument(P);
1474     break;
1475   }
1476 }
1477 
1478 void Stmt::Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
1479                    bool Canonical) const {
1480   StmtProfiler Profiler(ID, Context, Canonical);
1481   Profiler.Visit(this);
1482 }
1483