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/ExprOpenMP.h"
22 #include "clang/AST/StmtVisitor.h"
23 #include "llvm/ADT/FoldingSet.h"
24 using namespace clang;
25 
26 namespace {
27   class StmtProfiler : public ConstStmtVisitor<StmtProfiler> {
28     llvm::FoldingSetNodeID &ID;
29     const ASTContext &Context;
30     bool Canonical;
31 
32   public:
33     StmtProfiler(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
34                  bool Canonical)
35       : ID(ID), Context(Context), Canonical(Canonical) { }
36 
37     void VisitStmt(const Stmt *S);
38 
39 #define STMT(Node, Base) void Visit##Node(const Node *S);
40 #include "clang/AST/StmtNodes.inc"
41 
42     /// \brief Visit a declaration that is referenced within an expression
43     /// or statement.
44     void VisitDecl(const Decl *D);
45 
46     /// \brief Visit a type that is referenced within an expression or
47     /// statement.
48     void VisitType(QualType T);
49 
50     /// \brief Visit a name that occurs within an expression or statement.
51     void VisitName(DeclarationName Name);
52 
53     /// \brief Visit a nested-name-specifier that occurs within an expression
54     /// or statement.
55     void VisitNestedNameSpecifier(NestedNameSpecifier *NNS);
56 
57     /// \brief Visit a template name that occurs within an expression or
58     /// statement.
59     void VisitTemplateName(TemplateName Name);
60 
61     /// \brief Visit template arguments that occur within an expression or
62     /// statement.
63     void VisitTemplateArguments(const TemplateArgumentLoc *Args,
64                                 unsigned NumArgs);
65 
66     /// \brief Visit a single template argument.
67     void VisitTemplateArgument(const TemplateArgument &Arg);
68   };
69 }
70 
71 void StmtProfiler::VisitStmt(const Stmt *S) {
72   ID.AddInteger(S->getStmtClass());
73   for (const Stmt *SubStmt : S->children()) {
74     if (SubStmt)
75       Visit(SubStmt);
76     else
77       ID.AddInteger(0);
78   }
79 }
80 
81 void StmtProfiler::VisitDeclStmt(const DeclStmt *S) {
82   VisitStmt(S);
83   for (const auto *D : S->decls())
84     VisitDecl(D);
85 }
86 
87 void StmtProfiler::VisitNullStmt(const NullStmt *S) {
88   VisitStmt(S);
89 }
90 
91 void StmtProfiler::VisitCompoundStmt(const CompoundStmt *S) {
92   VisitStmt(S);
93 }
94 
95 void StmtProfiler::VisitSwitchCase(const SwitchCase *S) {
96   VisitStmt(S);
97 }
98 
99 void StmtProfiler::VisitCaseStmt(const CaseStmt *S) {
100   VisitStmt(S);
101 }
102 
103 void StmtProfiler::VisitDefaultStmt(const DefaultStmt *S) {
104   VisitStmt(S);
105 }
106 
107 void StmtProfiler::VisitLabelStmt(const LabelStmt *S) {
108   VisitStmt(S);
109   VisitDecl(S->getDecl());
110 }
111 
112 void StmtProfiler::VisitAttributedStmt(const AttributedStmt *S) {
113   VisitStmt(S);
114   // TODO: maybe visit attributes?
115 }
116 
117 void StmtProfiler::VisitIfStmt(const IfStmt *S) {
118   VisitStmt(S);
119   VisitDecl(S->getConditionVariable());
120 }
121 
122 void StmtProfiler::VisitSwitchStmt(const SwitchStmt *S) {
123   VisitStmt(S);
124   VisitDecl(S->getConditionVariable());
125 }
126 
127 void StmtProfiler::VisitWhileStmt(const WhileStmt *S) {
128   VisitStmt(S);
129   VisitDecl(S->getConditionVariable());
130 }
131 
132 void StmtProfiler::VisitDoStmt(const DoStmt *S) {
133   VisitStmt(S);
134 }
135 
136 void StmtProfiler::VisitForStmt(const ForStmt *S) {
137   VisitStmt(S);
138 }
139 
140 void StmtProfiler::VisitGotoStmt(const GotoStmt *S) {
141   VisitStmt(S);
142   VisitDecl(S->getLabel());
143 }
144 
145 void StmtProfiler::VisitIndirectGotoStmt(const IndirectGotoStmt *S) {
146   VisitStmt(S);
147 }
148 
149 void StmtProfiler::VisitContinueStmt(const ContinueStmt *S) {
150   VisitStmt(S);
151 }
152 
153 void StmtProfiler::VisitBreakStmt(const BreakStmt *S) {
154   VisitStmt(S);
155 }
156 
157 void StmtProfiler::VisitReturnStmt(const ReturnStmt *S) {
158   VisitStmt(S);
159 }
160 
161 void StmtProfiler::VisitGCCAsmStmt(const GCCAsmStmt *S) {
162   VisitStmt(S);
163   ID.AddBoolean(S->isVolatile());
164   ID.AddBoolean(S->isSimple());
165   VisitStringLiteral(S->getAsmString());
166   ID.AddInteger(S->getNumOutputs());
167   for (unsigned I = 0, N = S->getNumOutputs(); I != N; ++I) {
168     ID.AddString(S->getOutputName(I));
169     VisitStringLiteral(S->getOutputConstraintLiteral(I));
170   }
171   ID.AddInteger(S->getNumInputs());
172   for (unsigned I = 0, N = S->getNumInputs(); I != N; ++I) {
173     ID.AddString(S->getInputName(I));
174     VisitStringLiteral(S->getInputConstraintLiteral(I));
175   }
176   ID.AddInteger(S->getNumClobbers());
177   for (unsigned I = 0, N = S->getNumClobbers(); I != N; ++I)
178     VisitStringLiteral(S->getClobberStringLiteral(I));
179 }
180 
181 void StmtProfiler::VisitMSAsmStmt(const MSAsmStmt *S) {
182   // FIXME: Implement MS style inline asm statement profiler.
183   VisitStmt(S);
184 }
185 
186 void StmtProfiler::VisitCXXCatchStmt(const CXXCatchStmt *S) {
187   VisitStmt(S);
188   VisitType(S->getCaughtType());
189 }
190 
191 void StmtProfiler::VisitCXXTryStmt(const CXXTryStmt *S) {
192   VisitStmt(S);
193 }
194 
195 void StmtProfiler::VisitCXXForRangeStmt(const CXXForRangeStmt *S) {
196   VisitStmt(S);
197 }
198 
199 void StmtProfiler::VisitMSDependentExistsStmt(const MSDependentExistsStmt *S) {
200   VisitStmt(S);
201   ID.AddBoolean(S->isIfExists());
202   VisitNestedNameSpecifier(S->getQualifierLoc().getNestedNameSpecifier());
203   VisitName(S->getNameInfo().getName());
204 }
205 
206 void StmtProfiler::VisitSEHTryStmt(const SEHTryStmt *S) {
207   VisitStmt(S);
208 }
209 
210 void StmtProfiler::VisitSEHFinallyStmt(const SEHFinallyStmt *S) {
211   VisitStmt(S);
212 }
213 
214 void StmtProfiler::VisitSEHExceptStmt(const SEHExceptStmt *S) {
215   VisitStmt(S);
216 }
217 
218 void StmtProfiler::VisitSEHLeaveStmt(const SEHLeaveStmt *S) {
219   VisitStmt(S);
220 }
221 
222 void StmtProfiler::VisitCapturedStmt(const CapturedStmt *S) {
223   VisitStmt(S);
224 }
225 
226 void StmtProfiler::VisitObjCForCollectionStmt(const ObjCForCollectionStmt *S) {
227   VisitStmt(S);
228 }
229 
230 void StmtProfiler::VisitObjCAtCatchStmt(const ObjCAtCatchStmt *S) {
231   VisitStmt(S);
232   ID.AddBoolean(S->hasEllipsis());
233   if (S->getCatchParamDecl())
234     VisitType(S->getCatchParamDecl()->getType());
235 }
236 
237 void StmtProfiler::VisitObjCAtFinallyStmt(const ObjCAtFinallyStmt *S) {
238   VisitStmt(S);
239 }
240 
241 void StmtProfiler::VisitObjCAtTryStmt(const ObjCAtTryStmt *S) {
242   VisitStmt(S);
243 }
244 
245 void
246 StmtProfiler::VisitObjCAtSynchronizedStmt(const ObjCAtSynchronizedStmt *S) {
247   VisitStmt(S);
248 }
249 
250 void StmtProfiler::VisitObjCAtThrowStmt(const ObjCAtThrowStmt *S) {
251   VisitStmt(S);
252 }
253 
254 void
255 StmtProfiler::VisitObjCAutoreleasePoolStmt(const ObjCAutoreleasePoolStmt *S) {
256   VisitStmt(S);
257 }
258 
259 namespace {
260 class OMPClauseProfiler : public ConstOMPClauseVisitor<OMPClauseProfiler> {
261   StmtProfiler *Profiler;
262   /// \brief Process clauses with list of variables.
263   template <typename T>
264   void VisitOMPClauseList(T *Node);
265 public:
266   OMPClauseProfiler(StmtProfiler *P) : Profiler(P) { }
267 #define OPENMP_CLAUSE(Name, Class)                                             \
268   void Visit##Class(const Class *C);
269 #include "clang/Basic/OpenMPKinds.def"
270 };
271 
272 void OMPClauseProfiler::VisitOMPIfClause(const OMPIfClause *C) {
273   if (C->getCondition())
274     Profiler->VisitStmt(C->getCondition());
275 }
276 
277 void OMPClauseProfiler::VisitOMPFinalClause(const OMPFinalClause *C) {
278   if (C->getCondition())
279     Profiler->VisitStmt(C->getCondition());
280 }
281 
282 void OMPClauseProfiler::VisitOMPNumThreadsClause(const OMPNumThreadsClause *C) {
283   if (C->getNumThreads())
284     Profiler->VisitStmt(C->getNumThreads());
285 }
286 
287 void OMPClauseProfiler::VisitOMPSafelenClause(const OMPSafelenClause *C) {
288   if (C->getSafelen())
289     Profiler->VisitStmt(C->getSafelen());
290 }
291 
292 void OMPClauseProfiler::VisitOMPSimdlenClause(const OMPSimdlenClause *C) {
293   if (C->getSimdlen())
294     Profiler->VisitStmt(C->getSimdlen());
295 }
296 
297 void OMPClauseProfiler::VisitOMPCollapseClause(const OMPCollapseClause *C) {
298   if (C->getNumForLoops())
299     Profiler->VisitStmt(C->getNumForLoops());
300 }
301 
302 void OMPClauseProfiler::VisitOMPDefaultClause(const OMPDefaultClause *C) { }
303 
304 void OMPClauseProfiler::VisitOMPProcBindClause(const OMPProcBindClause *C) { }
305 
306 void OMPClauseProfiler::VisitOMPScheduleClause(const OMPScheduleClause *C) {
307   if (C->getChunkSize()) {
308     Profiler->VisitStmt(C->getChunkSize());
309     if (C->getHelperChunkSize()) {
310       Profiler->VisitStmt(C->getChunkSize());
311     }
312   }
313 }
314 
315 void OMPClauseProfiler::VisitOMPOrderedClause(const OMPOrderedClause *C) {
316   if (auto *Num = C->getNumForLoops())
317     Profiler->VisitStmt(Num);
318 }
319 
320 void OMPClauseProfiler::VisitOMPNowaitClause(const OMPNowaitClause *) {}
321 
322 void OMPClauseProfiler::VisitOMPUntiedClause(const OMPUntiedClause *) {}
323 
324 void OMPClauseProfiler::VisitOMPMergeableClause(const OMPMergeableClause *) {}
325 
326 void OMPClauseProfiler::VisitOMPReadClause(const OMPReadClause *) {}
327 
328 void OMPClauseProfiler::VisitOMPWriteClause(const OMPWriteClause *) {}
329 
330 void OMPClauseProfiler::VisitOMPUpdateClause(const OMPUpdateClause *) {}
331 
332 void OMPClauseProfiler::VisitOMPCaptureClause(const OMPCaptureClause *) {}
333 
334 void OMPClauseProfiler::VisitOMPSeqCstClause(const OMPSeqCstClause *) {}
335 
336 void OMPClauseProfiler::VisitOMPThreadsClause(const OMPThreadsClause *) {}
337 
338 void OMPClauseProfiler::VisitOMPSIMDClause(const OMPSIMDClause *) {}
339 
340 template<typename T>
341 void OMPClauseProfiler::VisitOMPClauseList(T *Node) {
342   for (auto *E : Node->varlists()) {
343     Profiler->VisitStmt(E);
344   }
345 }
346 
347 void OMPClauseProfiler::VisitOMPPrivateClause(const OMPPrivateClause *C) {
348   VisitOMPClauseList(C);
349   for (auto *E : C->private_copies()) {
350     Profiler->VisitStmt(E);
351   }
352 }
353 void
354 OMPClauseProfiler::VisitOMPFirstprivateClause(const OMPFirstprivateClause *C) {
355   VisitOMPClauseList(C);
356   for (auto *E : C->private_copies()) {
357     Profiler->VisitStmt(E);
358   }
359   for (auto *E : C->inits()) {
360     Profiler->VisitStmt(E);
361   }
362 }
363 void
364 OMPClauseProfiler::VisitOMPLastprivateClause(const OMPLastprivateClause *C) {
365   VisitOMPClauseList(C);
366   for (auto *E : C->source_exprs()) {
367     Profiler->VisitStmt(E);
368   }
369   for (auto *E : C->destination_exprs()) {
370     Profiler->VisitStmt(E);
371   }
372   for (auto *E : C->assignment_ops()) {
373     Profiler->VisitStmt(E);
374   }
375 }
376 void OMPClauseProfiler::VisitOMPSharedClause(const OMPSharedClause *C) {
377   VisitOMPClauseList(C);
378 }
379 void OMPClauseProfiler::VisitOMPReductionClause(
380                                          const OMPReductionClause *C) {
381   Profiler->VisitNestedNameSpecifier(
382       C->getQualifierLoc().getNestedNameSpecifier());
383   Profiler->VisitName(C->getNameInfo().getName());
384   VisitOMPClauseList(C);
385   for (auto *E : C->privates()) {
386     Profiler->VisitStmt(E);
387   }
388   for (auto *E : C->lhs_exprs()) {
389     Profiler->VisitStmt(E);
390   }
391   for (auto *E : C->rhs_exprs()) {
392     Profiler->VisitStmt(E);
393   }
394   for (auto *E : C->reduction_ops()) {
395     Profiler->VisitStmt(E);
396   }
397 }
398 void OMPClauseProfiler::VisitOMPLinearClause(const OMPLinearClause *C) {
399   VisitOMPClauseList(C);
400   for (auto *E : C->privates()) {
401     Profiler->VisitStmt(E);
402   }
403   for (auto *E : C->inits()) {
404     Profiler->VisitStmt(E);
405   }
406   for (auto *E : C->updates()) {
407     Profiler->VisitStmt(E);
408   }
409   for (auto *E : C->finals()) {
410     Profiler->VisitStmt(E);
411   }
412   Profiler->VisitStmt(C->getStep());
413   Profiler->VisitStmt(C->getCalcStep());
414 }
415 void OMPClauseProfiler::VisitOMPAlignedClause(const OMPAlignedClause *C) {
416   VisitOMPClauseList(C);
417   Profiler->VisitStmt(C->getAlignment());
418 }
419 void OMPClauseProfiler::VisitOMPCopyinClause(const OMPCopyinClause *C) {
420   VisitOMPClauseList(C);
421   for (auto *E : C->source_exprs()) {
422     Profiler->VisitStmt(E);
423   }
424   for (auto *E : C->destination_exprs()) {
425     Profiler->VisitStmt(E);
426   }
427   for (auto *E : C->assignment_ops()) {
428     Profiler->VisitStmt(E);
429   }
430 }
431 void
432 OMPClauseProfiler::VisitOMPCopyprivateClause(const OMPCopyprivateClause *C) {
433   VisitOMPClauseList(C);
434   for (auto *E : C->source_exprs()) {
435     Profiler->VisitStmt(E);
436   }
437   for (auto *E : C->destination_exprs()) {
438     Profiler->VisitStmt(E);
439   }
440   for (auto *E : C->assignment_ops()) {
441     Profiler->VisitStmt(E);
442   }
443 }
444 void OMPClauseProfiler::VisitOMPFlushClause(const OMPFlushClause *C) {
445   VisitOMPClauseList(C);
446 }
447 void OMPClauseProfiler::VisitOMPDependClause(const OMPDependClause *C) {
448   VisitOMPClauseList(C);
449 }
450 void OMPClauseProfiler::VisitOMPDeviceClause(const OMPDeviceClause *C) {
451   Profiler->VisitStmt(C->getDevice());
452 }
453 void OMPClauseProfiler::VisitOMPMapClause(const OMPMapClause *C) {
454   VisitOMPClauseList(C);
455 }
456 }
457 
458 void
459 StmtProfiler::VisitOMPExecutableDirective(const OMPExecutableDirective *S) {
460   VisitStmt(S);
461   OMPClauseProfiler P(this);
462   ArrayRef<OMPClause *> Clauses = S->clauses();
463   for (ArrayRef<OMPClause *>::iterator I = Clauses.begin(), E = Clauses.end();
464        I != E; ++I)
465     if (*I)
466       P.Visit(*I);
467 }
468 
469 void StmtProfiler::VisitOMPLoopDirective(const OMPLoopDirective *S) {
470   VisitOMPExecutableDirective(S);
471 }
472 
473 void StmtProfiler::VisitOMPParallelDirective(const OMPParallelDirective *S) {
474   VisitOMPExecutableDirective(S);
475 }
476 
477 void StmtProfiler::VisitOMPSimdDirective(const OMPSimdDirective *S) {
478   VisitOMPLoopDirective(S);
479 }
480 
481 void StmtProfiler::VisitOMPForDirective(const OMPForDirective *S) {
482   VisitOMPLoopDirective(S);
483 }
484 
485 void StmtProfiler::VisitOMPForSimdDirective(const OMPForSimdDirective *S) {
486   VisitOMPLoopDirective(S);
487 }
488 
489 void StmtProfiler::VisitOMPSectionsDirective(const OMPSectionsDirective *S) {
490   VisitOMPExecutableDirective(S);
491 }
492 
493 void StmtProfiler::VisitOMPSectionDirective(const OMPSectionDirective *S) {
494   VisitOMPExecutableDirective(S);
495 }
496 
497 void StmtProfiler::VisitOMPSingleDirective(const OMPSingleDirective *S) {
498   VisitOMPExecutableDirective(S);
499 }
500 
501 void StmtProfiler::VisitOMPMasterDirective(const OMPMasterDirective *S) {
502   VisitOMPExecutableDirective(S);
503 }
504 
505 void StmtProfiler::VisitOMPCriticalDirective(const OMPCriticalDirective *S) {
506   VisitOMPExecutableDirective(S);
507   VisitName(S->getDirectiveName().getName());
508 }
509 
510 void
511 StmtProfiler::VisitOMPParallelForDirective(const OMPParallelForDirective *S) {
512   VisitOMPLoopDirective(S);
513 }
514 
515 void StmtProfiler::VisitOMPParallelForSimdDirective(
516     const OMPParallelForSimdDirective *S) {
517   VisitOMPLoopDirective(S);
518 }
519 
520 void StmtProfiler::VisitOMPParallelSectionsDirective(
521     const OMPParallelSectionsDirective *S) {
522   VisitOMPExecutableDirective(S);
523 }
524 
525 void StmtProfiler::VisitOMPTaskDirective(const OMPTaskDirective *S) {
526   VisitOMPExecutableDirective(S);
527 }
528 
529 void StmtProfiler::VisitOMPTaskyieldDirective(const OMPTaskyieldDirective *S) {
530   VisitOMPExecutableDirective(S);
531 }
532 
533 void StmtProfiler::VisitOMPBarrierDirective(const OMPBarrierDirective *S) {
534   VisitOMPExecutableDirective(S);
535 }
536 
537 void StmtProfiler::VisitOMPTaskwaitDirective(const OMPTaskwaitDirective *S) {
538   VisitOMPExecutableDirective(S);
539 }
540 
541 void StmtProfiler::VisitOMPTaskgroupDirective(const OMPTaskgroupDirective *S) {
542   VisitOMPExecutableDirective(S);
543 }
544 
545 void StmtProfiler::VisitOMPFlushDirective(const OMPFlushDirective *S) {
546   VisitOMPExecutableDirective(S);
547 }
548 
549 void StmtProfiler::VisitOMPOrderedDirective(const OMPOrderedDirective *S) {
550   VisitOMPExecutableDirective(S);
551 }
552 
553 void StmtProfiler::VisitOMPAtomicDirective(const OMPAtomicDirective *S) {
554   VisitOMPExecutableDirective(S);
555 }
556 
557 void StmtProfiler::VisitOMPTargetDirective(const OMPTargetDirective *S) {
558   VisitOMPExecutableDirective(S);
559 }
560 
561 void StmtProfiler::VisitOMPTargetDataDirective(const OMPTargetDataDirective *S) {
562   VisitOMPExecutableDirective(S);
563 }
564 
565 void StmtProfiler::VisitOMPTeamsDirective(const OMPTeamsDirective *S) {
566   VisitOMPExecutableDirective(S);
567 }
568 
569 void StmtProfiler::VisitOMPCancellationPointDirective(
570     const OMPCancellationPointDirective *S) {
571   VisitOMPExecutableDirective(S);
572 }
573 
574 void StmtProfiler::VisitOMPCancelDirective(const OMPCancelDirective *S) {
575   VisitOMPExecutableDirective(S);
576 }
577 
578 void StmtProfiler::VisitExpr(const Expr *S) {
579   VisitStmt(S);
580 }
581 
582 void StmtProfiler::VisitDeclRefExpr(const DeclRefExpr *S) {
583   VisitExpr(S);
584   if (!Canonical)
585     VisitNestedNameSpecifier(S->getQualifier());
586   VisitDecl(S->getDecl());
587   if (!Canonical)
588     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
589 }
590 
591 void StmtProfiler::VisitPredefinedExpr(const PredefinedExpr *S) {
592   VisitExpr(S);
593   ID.AddInteger(S->getIdentType());
594 }
595 
596 void StmtProfiler::VisitIntegerLiteral(const IntegerLiteral *S) {
597   VisitExpr(S);
598   S->getValue().Profile(ID);
599   ID.AddInteger(S->getType()->castAs<BuiltinType>()->getKind());
600 }
601 
602 void StmtProfiler::VisitCharacterLiteral(const CharacterLiteral *S) {
603   VisitExpr(S);
604   ID.AddInteger(S->getKind());
605   ID.AddInteger(S->getValue());
606 }
607 
608 void StmtProfiler::VisitFloatingLiteral(const FloatingLiteral *S) {
609   VisitExpr(S);
610   S->getValue().Profile(ID);
611   ID.AddBoolean(S->isExact());
612   ID.AddInteger(S->getType()->castAs<BuiltinType>()->getKind());
613 }
614 
615 void StmtProfiler::VisitImaginaryLiteral(const ImaginaryLiteral *S) {
616   VisitExpr(S);
617 }
618 
619 void StmtProfiler::VisitStringLiteral(const StringLiteral *S) {
620   VisitExpr(S);
621   ID.AddString(S->getBytes());
622   ID.AddInteger(S->getKind());
623 }
624 
625 void StmtProfiler::VisitParenExpr(const ParenExpr *S) {
626   VisitExpr(S);
627 }
628 
629 void StmtProfiler::VisitParenListExpr(const ParenListExpr *S) {
630   VisitExpr(S);
631 }
632 
633 void StmtProfiler::VisitUnaryOperator(const UnaryOperator *S) {
634   VisitExpr(S);
635   ID.AddInteger(S->getOpcode());
636 }
637 
638 void StmtProfiler::VisitOffsetOfExpr(const OffsetOfExpr *S) {
639   VisitType(S->getTypeSourceInfo()->getType());
640   unsigned n = S->getNumComponents();
641   for (unsigned i = 0; i < n; ++i) {
642     const OffsetOfExpr::OffsetOfNode& ON = S->getComponent(i);
643     ID.AddInteger(ON.getKind());
644     switch (ON.getKind()) {
645     case OffsetOfExpr::OffsetOfNode::Array:
646       // Expressions handled below.
647       break;
648 
649     case OffsetOfExpr::OffsetOfNode::Field:
650       VisitDecl(ON.getField());
651       break;
652 
653     case OffsetOfExpr::OffsetOfNode::Identifier:
654       ID.AddPointer(ON.getFieldName());
655       break;
656 
657     case OffsetOfExpr::OffsetOfNode::Base:
658       // These nodes are implicit, and therefore don't need profiling.
659       break;
660     }
661   }
662 
663   VisitExpr(S);
664 }
665 
666 void
667 StmtProfiler::VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *S) {
668   VisitExpr(S);
669   ID.AddInteger(S->getKind());
670   if (S->isArgumentType())
671     VisitType(S->getArgumentType());
672 }
673 
674 void StmtProfiler::VisitArraySubscriptExpr(const ArraySubscriptExpr *S) {
675   VisitExpr(S);
676 }
677 
678 void StmtProfiler::VisitOMPArraySectionExpr(const OMPArraySectionExpr *S) {
679   VisitExpr(S);
680 }
681 
682 void StmtProfiler::VisitCallExpr(const CallExpr *S) {
683   VisitExpr(S);
684 }
685 
686 void StmtProfiler::VisitMemberExpr(const MemberExpr *S) {
687   VisitExpr(S);
688   VisitDecl(S->getMemberDecl());
689   if (!Canonical)
690     VisitNestedNameSpecifier(S->getQualifier());
691   ID.AddBoolean(S->isArrow());
692 }
693 
694 void StmtProfiler::VisitCompoundLiteralExpr(const CompoundLiteralExpr *S) {
695   VisitExpr(S);
696   ID.AddBoolean(S->isFileScope());
697 }
698 
699 void StmtProfiler::VisitCastExpr(const CastExpr *S) {
700   VisitExpr(S);
701 }
702 
703 void StmtProfiler::VisitImplicitCastExpr(const ImplicitCastExpr *S) {
704   VisitCastExpr(S);
705   ID.AddInteger(S->getValueKind());
706 }
707 
708 void StmtProfiler::VisitExplicitCastExpr(const ExplicitCastExpr *S) {
709   VisitCastExpr(S);
710   VisitType(S->getTypeAsWritten());
711 }
712 
713 void StmtProfiler::VisitCStyleCastExpr(const CStyleCastExpr *S) {
714   VisitExplicitCastExpr(S);
715 }
716 
717 void StmtProfiler::VisitBinaryOperator(const BinaryOperator *S) {
718   VisitExpr(S);
719   ID.AddInteger(S->getOpcode());
720 }
721 
722 void
723 StmtProfiler::VisitCompoundAssignOperator(const CompoundAssignOperator *S) {
724   VisitBinaryOperator(S);
725 }
726 
727 void StmtProfiler::VisitConditionalOperator(const ConditionalOperator *S) {
728   VisitExpr(S);
729 }
730 
731 void StmtProfiler::VisitBinaryConditionalOperator(
732     const BinaryConditionalOperator *S) {
733   VisitExpr(S);
734 }
735 
736 void StmtProfiler::VisitAddrLabelExpr(const AddrLabelExpr *S) {
737   VisitExpr(S);
738   VisitDecl(S->getLabel());
739 }
740 
741 void StmtProfiler::VisitStmtExpr(const StmtExpr *S) {
742   VisitExpr(S);
743 }
744 
745 void StmtProfiler::VisitShuffleVectorExpr(const ShuffleVectorExpr *S) {
746   VisitExpr(S);
747 }
748 
749 void StmtProfiler::VisitConvertVectorExpr(const ConvertVectorExpr *S) {
750   VisitExpr(S);
751 }
752 
753 void StmtProfiler::VisitChooseExpr(const ChooseExpr *S) {
754   VisitExpr(S);
755 }
756 
757 void StmtProfiler::VisitGNUNullExpr(const GNUNullExpr *S) {
758   VisitExpr(S);
759 }
760 
761 void StmtProfiler::VisitVAArgExpr(const VAArgExpr *S) {
762   VisitExpr(S);
763 }
764 
765 void StmtProfiler::VisitInitListExpr(const InitListExpr *S) {
766   if (S->getSyntacticForm()) {
767     VisitInitListExpr(S->getSyntacticForm());
768     return;
769   }
770 
771   VisitExpr(S);
772 }
773 
774 void StmtProfiler::VisitDesignatedInitExpr(const DesignatedInitExpr *S) {
775   VisitExpr(S);
776   ID.AddBoolean(S->usesGNUSyntax());
777   for (DesignatedInitExpr::const_designators_iterator D =
778          S->designators_begin(), DEnd = S->designators_end();
779        D != DEnd; ++D) {
780     if (D->isFieldDesignator()) {
781       ID.AddInteger(0);
782       VisitName(D->getFieldName());
783       continue;
784     }
785 
786     if (D->isArrayDesignator()) {
787       ID.AddInteger(1);
788     } else {
789       assert(D->isArrayRangeDesignator());
790       ID.AddInteger(2);
791     }
792     ID.AddInteger(D->getFirstExprIndex());
793   }
794 }
795 
796 // Seems that if VisitInitListExpr() only works on the syntactic form of an
797 // InitListExpr, then a DesignatedInitUpdateExpr is not encountered.
798 void StmtProfiler::VisitDesignatedInitUpdateExpr(
799     const DesignatedInitUpdateExpr *S) {
800   llvm_unreachable("Unexpected DesignatedInitUpdateExpr in syntactic form of "
801                    "initializer");
802 }
803 
804 void StmtProfiler::VisitNoInitExpr(const NoInitExpr *S) {
805   llvm_unreachable("Unexpected NoInitExpr in syntactic form of initializer");
806 }
807 
808 void StmtProfiler::VisitImplicitValueInitExpr(const ImplicitValueInitExpr *S) {
809   VisitExpr(S);
810 }
811 
812 void StmtProfiler::VisitExtVectorElementExpr(const ExtVectorElementExpr *S) {
813   VisitExpr(S);
814   VisitName(&S->getAccessor());
815 }
816 
817 void StmtProfiler::VisitBlockExpr(const BlockExpr *S) {
818   VisitExpr(S);
819   VisitDecl(S->getBlockDecl());
820 }
821 
822 void StmtProfiler::VisitGenericSelectionExpr(const GenericSelectionExpr *S) {
823   VisitExpr(S);
824   for (unsigned i = 0; i != S->getNumAssocs(); ++i) {
825     QualType T = S->getAssocType(i);
826     if (T.isNull())
827       ID.AddPointer(nullptr);
828     else
829       VisitType(T);
830     VisitExpr(S->getAssocExpr(i));
831   }
832 }
833 
834 void StmtProfiler::VisitPseudoObjectExpr(const PseudoObjectExpr *S) {
835   VisitExpr(S);
836   for (PseudoObjectExpr::const_semantics_iterator
837          i = S->semantics_begin(), e = S->semantics_end(); i != e; ++i)
838     // Normally, we would not profile the source expressions of OVEs.
839     if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(*i))
840       Visit(OVE->getSourceExpr());
841 }
842 
843 void StmtProfiler::VisitAtomicExpr(const AtomicExpr *S) {
844   VisitExpr(S);
845   ID.AddInteger(S->getOp());
846 }
847 
848 static Stmt::StmtClass DecodeOperatorCall(const CXXOperatorCallExpr *S,
849                                           UnaryOperatorKind &UnaryOp,
850                                           BinaryOperatorKind &BinaryOp) {
851   switch (S->getOperator()) {
852   case OO_None:
853   case OO_New:
854   case OO_Delete:
855   case OO_Array_New:
856   case OO_Array_Delete:
857   case OO_Arrow:
858   case OO_Call:
859   case OO_Conditional:
860   case OO_Coawait:
861   case NUM_OVERLOADED_OPERATORS:
862     llvm_unreachable("Invalid operator call kind");
863 
864   case OO_Plus:
865     if (S->getNumArgs() == 1) {
866       UnaryOp = UO_Plus;
867       return Stmt::UnaryOperatorClass;
868     }
869 
870     BinaryOp = BO_Add;
871     return Stmt::BinaryOperatorClass;
872 
873   case OO_Minus:
874     if (S->getNumArgs() == 1) {
875       UnaryOp = UO_Minus;
876       return Stmt::UnaryOperatorClass;
877     }
878 
879     BinaryOp = BO_Sub;
880     return Stmt::BinaryOperatorClass;
881 
882   case OO_Star:
883     if (S->getNumArgs() == 1) {
884       UnaryOp = UO_Deref;
885       return Stmt::UnaryOperatorClass;
886     }
887 
888     BinaryOp = BO_Mul;
889     return Stmt::BinaryOperatorClass;
890 
891   case OO_Slash:
892     BinaryOp = BO_Div;
893     return Stmt::BinaryOperatorClass;
894 
895   case OO_Percent:
896     BinaryOp = BO_Rem;
897     return Stmt::BinaryOperatorClass;
898 
899   case OO_Caret:
900     BinaryOp = BO_Xor;
901     return Stmt::BinaryOperatorClass;
902 
903   case OO_Amp:
904     if (S->getNumArgs() == 1) {
905       UnaryOp = UO_AddrOf;
906       return Stmt::UnaryOperatorClass;
907     }
908 
909     BinaryOp = BO_And;
910     return Stmt::BinaryOperatorClass;
911 
912   case OO_Pipe:
913     BinaryOp = BO_Or;
914     return Stmt::BinaryOperatorClass;
915 
916   case OO_Tilde:
917     UnaryOp = UO_Not;
918     return Stmt::UnaryOperatorClass;
919 
920   case OO_Exclaim:
921     UnaryOp = UO_LNot;
922     return Stmt::UnaryOperatorClass;
923 
924   case OO_Equal:
925     BinaryOp = BO_Assign;
926     return Stmt::BinaryOperatorClass;
927 
928   case OO_Less:
929     BinaryOp = BO_LT;
930     return Stmt::BinaryOperatorClass;
931 
932   case OO_Greater:
933     BinaryOp = BO_GT;
934     return Stmt::BinaryOperatorClass;
935 
936   case OO_PlusEqual:
937     BinaryOp = BO_AddAssign;
938     return Stmt::CompoundAssignOperatorClass;
939 
940   case OO_MinusEqual:
941     BinaryOp = BO_SubAssign;
942     return Stmt::CompoundAssignOperatorClass;
943 
944   case OO_StarEqual:
945     BinaryOp = BO_MulAssign;
946     return Stmt::CompoundAssignOperatorClass;
947 
948   case OO_SlashEqual:
949     BinaryOp = BO_DivAssign;
950     return Stmt::CompoundAssignOperatorClass;
951 
952   case OO_PercentEqual:
953     BinaryOp = BO_RemAssign;
954     return Stmt::CompoundAssignOperatorClass;
955 
956   case OO_CaretEqual:
957     BinaryOp = BO_XorAssign;
958     return Stmt::CompoundAssignOperatorClass;
959 
960   case OO_AmpEqual:
961     BinaryOp = BO_AndAssign;
962     return Stmt::CompoundAssignOperatorClass;
963 
964   case OO_PipeEqual:
965     BinaryOp = BO_OrAssign;
966     return Stmt::CompoundAssignOperatorClass;
967 
968   case OO_LessLess:
969     BinaryOp = BO_Shl;
970     return Stmt::BinaryOperatorClass;
971 
972   case OO_GreaterGreater:
973     BinaryOp = BO_Shr;
974     return Stmt::BinaryOperatorClass;
975 
976   case OO_LessLessEqual:
977     BinaryOp = BO_ShlAssign;
978     return Stmt::CompoundAssignOperatorClass;
979 
980   case OO_GreaterGreaterEqual:
981     BinaryOp = BO_ShrAssign;
982     return Stmt::CompoundAssignOperatorClass;
983 
984   case OO_EqualEqual:
985     BinaryOp = BO_EQ;
986     return Stmt::BinaryOperatorClass;
987 
988   case OO_ExclaimEqual:
989     BinaryOp = BO_NE;
990     return Stmt::BinaryOperatorClass;
991 
992   case OO_LessEqual:
993     BinaryOp = BO_LE;
994     return Stmt::BinaryOperatorClass;
995 
996   case OO_GreaterEqual:
997     BinaryOp = BO_GE;
998     return Stmt::BinaryOperatorClass;
999 
1000   case OO_AmpAmp:
1001     BinaryOp = BO_LAnd;
1002     return Stmt::BinaryOperatorClass;
1003 
1004   case OO_PipePipe:
1005     BinaryOp = BO_LOr;
1006     return Stmt::BinaryOperatorClass;
1007 
1008   case OO_PlusPlus:
1009     UnaryOp = S->getNumArgs() == 1? UO_PreInc
1010                                   : UO_PostInc;
1011     return Stmt::UnaryOperatorClass;
1012 
1013   case OO_MinusMinus:
1014     UnaryOp = S->getNumArgs() == 1? UO_PreDec
1015                                   : UO_PostDec;
1016     return Stmt::UnaryOperatorClass;
1017 
1018   case OO_Comma:
1019     BinaryOp = BO_Comma;
1020     return Stmt::BinaryOperatorClass;
1021 
1022 
1023   case OO_ArrowStar:
1024     BinaryOp = BO_PtrMemI;
1025     return Stmt::BinaryOperatorClass;
1026 
1027   case OO_Subscript:
1028     return Stmt::ArraySubscriptExprClass;
1029   }
1030 
1031   llvm_unreachable("Invalid overloaded operator expression");
1032 }
1033 
1034 
1035 void StmtProfiler::VisitCXXOperatorCallExpr(const CXXOperatorCallExpr *S) {
1036   if (S->isTypeDependent()) {
1037     // Type-dependent operator calls are profiled like their underlying
1038     // syntactic operator.
1039     UnaryOperatorKind UnaryOp = UO_Extension;
1040     BinaryOperatorKind BinaryOp = BO_Comma;
1041     Stmt::StmtClass SC = DecodeOperatorCall(S, UnaryOp, BinaryOp);
1042 
1043     ID.AddInteger(SC);
1044     for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
1045       Visit(S->getArg(I));
1046     if (SC == Stmt::UnaryOperatorClass)
1047       ID.AddInteger(UnaryOp);
1048     else if (SC == Stmt::BinaryOperatorClass ||
1049              SC == Stmt::CompoundAssignOperatorClass)
1050       ID.AddInteger(BinaryOp);
1051     else
1052       assert(SC == Stmt::ArraySubscriptExprClass);
1053 
1054     return;
1055   }
1056 
1057   VisitCallExpr(S);
1058   ID.AddInteger(S->getOperator());
1059 }
1060 
1061 void StmtProfiler::VisitCXXMemberCallExpr(const CXXMemberCallExpr *S) {
1062   VisitCallExpr(S);
1063 }
1064 
1065 void StmtProfiler::VisitCUDAKernelCallExpr(const CUDAKernelCallExpr *S) {
1066   VisitCallExpr(S);
1067 }
1068 
1069 void StmtProfiler::VisitAsTypeExpr(const AsTypeExpr *S) {
1070   VisitExpr(S);
1071 }
1072 
1073 void StmtProfiler::VisitCXXNamedCastExpr(const CXXNamedCastExpr *S) {
1074   VisitExplicitCastExpr(S);
1075 }
1076 
1077 void StmtProfiler::VisitCXXStaticCastExpr(const CXXStaticCastExpr *S) {
1078   VisitCXXNamedCastExpr(S);
1079 }
1080 
1081 void StmtProfiler::VisitCXXDynamicCastExpr(const CXXDynamicCastExpr *S) {
1082   VisitCXXNamedCastExpr(S);
1083 }
1084 
1085 void
1086 StmtProfiler::VisitCXXReinterpretCastExpr(const CXXReinterpretCastExpr *S) {
1087   VisitCXXNamedCastExpr(S);
1088 }
1089 
1090 void StmtProfiler::VisitCXXConstCastExpr(const CXXConstCastExpr *S) {
1091   VisitCXXNamedCastExpr(S);
1092 }
1093 
1094 void StmtProfiler::VisitUserDefinedLiteral(const UserDefinedLiteral *S) {
1095   VisitCallExpr(S);
1096 }
1097 
1098 void StmtProfiler::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *S) {
1099   VisitExpr(S);
1100   ID.AddBoolean(S->getValue());
1101 }
1102 
1103 void StmtProfiler::VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *S) {
1104   VisitExpr(S);
1105 }
1106 
1107 void StmtProfiler::VisitCXXStdInitializerListExpr(
1108     const CXXStdInitializerListExpr *S) {
1109   VisitExpr(S);
1110 }
1111 
1112 void StmtProfiler::VisitCXXTypeidExpr(const CXXTypeidExpr *S) {
1113   VisitExpr(S);
1114   if (S->isTypeOperand())
1115     VisitType(S->getTypeOperandSourceInfo()->getType());
1116 }
1117 
1118 void StmtProfiler::VisitCXXUuidofExpr(const CXXUuidofExpr *S) {
1119   VisitExpr(S);
1120   if (S->isTypeOperand())
1121     VisitType(S->getTypeOperandSourceInfo()->getType());
1122 }
1123 
1124 void StmtProfiler::VisitMSPropertyRefExpr(const MSPropertyRefExpr *S) {
1125   VisitExpr(S);
1126   VisitDecl(S->getPropertyDecl());
1127 }
1128 
1129 void StmtProfiler::VisitCXXThisExpr(const CXXThisExpr *S) {
1130   VisitExpr(S);
1131   ID.AddBoolean(S->isImplicit());
1132 }
1133 
1134 void StmtProfiler::VisitCXXThrowExpr(const CXXThrowExpr *S) {
1135   VisitExpr(S);
1136 }
1137 
1138 void StmtProfiler::VisitCXXDefaultArgExpr(const CXXDefaultArgExpr *S) {
1139   VisitExpr(S);
1140   VisitDecl(S->getParam());
1141 }
1142 
1143 void StmtProfiler::VisitCXXDefaultInitExpr(const CXXDefaultInitExpr *S) {
1144   VisitExpr(S);
1145   VisitDecl(S->getField());
1146 }
1147 
1148 void StmtProfiler::VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *S) {
1149   VisitExpr(S);
1150   VisitDecl(
1151          const_cast<CXXDestructorDecl *>(S->getTemporary()->getDestructor()));
1152 }
1153 
1154 void StmtProfiler::VisitCXXConstructExpr(const CXXConstructExpr *S) {
1155   VisitExpr(S);
1156   VisitDecl(S->getConstructor());
1157   ID.AddBoolean(S->isElidable());
1158 }
1159 
1160 void StmtProfiler::VisitCXXFunctionalCastExpr(const CXXFunctionalCastExpr *S) {
1161   VisitExplicitCastExpr(S);
1162 }
1163 
1164 void
1165 StmtProfiler::VisitCXXTemporaryObjectExpr(const CXXTemporaryObjectExpr *S) {
1166   VisitCXXConstructExpr(S);
1167 }
1168 
1169 void
1170 StmtProfiler::VisitLambdaExpr(const LambdaExpr *S) {
1171   VisitExpr(S);
1172   for (LambdaExpr::capture_iterator C = S->explicit_capture_begin(),
1173                                  CEnd = S->explicit_capture_end();
1174        C != CEnd; ++C) {
1175     ID.AddInteger(C->getCaptureKind());
1176     switch (C->getCaptureKind()) {
1177     case LCK_This:
1178       break;
1179     case LCK_ByRef:
1180     case LCK_ByCopy:
1181       VisitDecl(C->getCapturedVar());
1182       ID.AddBoolean(C->isPackExpansion());
1183       break;
1184     case LCK_VLAType:
1185       llvm_unreachable("VLA type in explicit captures.");
1186     }
1187   }
1188   // Note: If we actually needed to be able to match lambda
1189   // expressions, we would have to consider parameters and return type
1190   // here, among other things.
1191   VisitStmt(S->getBody());
1192 }
1193 
1194 void
1195 StmtProfiler::VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *S) {
1196   VisitExpr(S);
1197 }
1198 
1199 void StmtProfiler::VisitCXXDeleteExpr(const CXXDeleteExpr *S) {
1200   VisitExpr(S);
1201   ID.AddBoolean(S->isGlobalDelete());
1202   ID.AddBoolean(S->isArrayForm());
1203   VisitDecl(S->getOperatorDelete());
1204 }
1205 
1206 
1207 void StmtProfiler::VisitCXXNewExpr(const CXXNewExpr *S) {
1208   VisitExpr(S);
1209   VisitType(S->getAllocatedType());
1210   VisitDecl(S->getOperatorNew());
1211   VisitDecl(S->getOperatorDelete());
1212   ID.AddBoolean(S->isArray());
1213   ID.AddInteger(S->getNumPlacementArgs());
1214   ID.AddBoolean(S->isGlobalNew());
1215   ID.AddBoolean(S->isParenTypeId());
1216   ID.AddInteger(S->getInitializationStyle());
1217 }
1218 
1219 void
1220 StmtProfiler::VisitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *S) {
1221   VisitExpr(S);
1222   ID.AddBoolean(S->isArrow());
1223   VisitNestedNameSpecifier(S->getQualifier());
1224   ID.AddBoolean(S->getScopeTypeInfo() != nullptr);
1225   if (S->getScopeTypeInfo())
1226     VisitType(S->getScopeTypeInfo()->getType());
1227   ID.AddBoolean(S->getDestroyedTypeInfo() != nullptr);
1228   if (S->getDestroyedTypeInfo())
1229     VisitType(S->getDestroyedType());
1230   else
1231     ID.AddPointer(S->getDestroyedTypeIdentifier());
1232 }
1233 
1234 void StmtProfiler::VisitOverloadExpr(const OverloadExpr *S) {
1235   VisitExpr(S);
1236   VisitNestedNameSpecifier(S->getQualifier());
1237   VisitName(S->getName());
1238   ID.AddBoolean(S->hasExplicitTemplateArgs());
1239   if (S->hasExplicitTemplateArgs())
1240     VisitTemplateArguments(S->getExplicitTemplateArgs().getTemplateArgs(),
1241                            S->getExplicitTemplateArgs().NumTemplateArgs);
1242 }
1243 
1244 void
1245 StmtProfiler::VisitUnresolvedLookupExpr(const UnresolvedLookupExpr *S) {
1246   VisitOverloadExpr(S);
1247 }
1248 
1249 void StmtProfiler::VisitTypeTraitExpr(const TypeTraitExpr *S) {
1250   VisitExpr(S);
1251   ID.AddInteger(S->getTrait());
1252   ID.AddInteger(S->getNumArgs());
1253   for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
1254     VisitType(S->getArg(I)->getType());
1255 }
1256 
1257 void StmtProfiler::VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *S) {
1258   VisitExpr(S);
1259   ID.AddInteger(S->getTrait());
1260   VisitType(S->getQueriedType());
1261 }
1262 
1263 void StmtProfiler::VisitExpressionTraitExpr(const ExpressionTraitExpr *S) {
1264   VisitExpr(S);
1265   ID.AddInteger(S->getTrait());
1266   VisitExpr(S->getQueriedExpression());
1267 }
1268 
1269 void StmtProfiler::VisitDependentScopeDeclRefExpr(
1270     const DependentScopeDeclRefExpr *S) {
1271   VisitExpr(S);
1272   VisitName(S->getDeclName());
1273   VisitNestedNameSpecifier(S->getQualifier());
1274   ID.AddBoolean(S->hasExplicitTemplateArgs());
1275   if (S->hasExplicitTemplateArgs())
1276     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1277 }
1278 
1279 void StmtProfiler::VisitExprWithCleanups(const ExprWithCleanups *S) {
1280   VisitExpr(S);
1281 }
1282 
1283 void StmtProfiler::VisitCXXUnresolvedConstructExpr(
1284     const CXXUnresolvedConstructExpr *S) {
1285   VisitExpr(S);
1286   VisitType(S->getTypeAsWritten());
1287 }
1288 
1289 void StmtProfiler::VisitCXXDependentScopeMemberExpr(
1290     const CXXDependentScopeMemberExpr *S) {
1291   ID.AddBoolean(S->isImplicitAccess());
1292   if (!S->isImplicitAccess()) {
1293     VisitExpr(S);
1294     ID.AddBoolean(S->isArrow());
1295   }
1296   VisitNestedNameSpecifier(S->getQualifier());
1297   VisitName(S->getMember());
1298   ID.AddBoolean(S->hasExplicitTemplateArgs());
1299   if (S->hasExplicitTemplateArgs())
1300     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1301 }
1302 
1303 void StmtProfiler::VisitUnresolvedMemberExpr(const UnresolvedMemberExpr *S) {
1304   ID.AddBoolean(S->isImplicitAccess());
1305   if (!S->isImplicitAccess()) {
1306     VisitExpr(S);
1307     ID.AddBoolean(S->isArrow());
1308   }
1309   VisitNestedNameSpecifier(S->getQualifier());
1310   VisitName(S->getMemberName());
1311   ID.AddBoolean(S->hasExplicitTemplateArgs());
1312   if (S->hasExplicitTemplateArgs())
1313     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1314 }
1315 
1316 void StmtProfiler::VisitCXXNoexceptExpr(const CXXNoexceptExpr *S) {
1317   VisitExpr(S);
1318 }
1319 
1320 void StmtProfiler::VisitPackExpansionExpr(const PackExpansionExpr *S) {
1321   VisitExpr(S);
1322 }
1323 
1324 void StmtProfiler::VisitSizeOfPackExpr(const SizeOfPackExpr *S) {
1325   VisitExpr(S);
1326   VisitDecl(S->getPack());
1327   if (S->isPartiallySubstituted()) {
1328     auto Args = S->getPartialArguments();
1329     ID.AddInteger(Args.size());
1330     for (const auto &TA : Args)
1331       VisitTemplateArgument(TA);
1332   } else {
1333     ID.AddInteger(0);
1334   }
1335 }
1336 
1337 void StmtProfiler::VisitSubstNonTypeTemplateParmPackExpr(
1338     const SubstNonTypeTemplateParmPackExpr *S) {
1339   VisitExpr(S);
1340   VisitDecl(S->getParameterPack());
1341   VisitTemplateArgument(S->getArgumentPack());
1342 }
1343 
1344 void StmtProfiler::VisitSubstNonTypeTemplateParmExpr(
1345     const SubstNonTypeTemplateParmExpr *E) {
1346   // Profile exactly as the replacement expression.
1347   Visit(E->getReplacement());
1348 }
1349 
1350 void StmtProfiler::VisitFunctionParmPackExpr(const FunctionParmPackExpr *S) {
1351   VisitExpr(S);
1352   VisitDecl(S->getParameterPack());
1353   ID.AddInteger(S->getNumExpansions());
1354   for (FunctionParmPackExpr::iterator I = S->begin(), E = S->end(); I != E; ++I)
1355     VisitDecl(*I);
1356 }
1357 
1358 void StmtProfiler::VisitMaterializeTemporaryExpr(
1359                                            const MaterializeTemporaryExpr *S) {
1360   VisitExpr(S);
1361 }
1362 
1363 void StmtProfiler::VisitCXXFoldExpr(const CXXFoldExpr *S) {
1364   VisitExpr(S);
1365   ID.AddInteger(S->getOperator());
1366 }
1367 
1368 void StmtProfiler::VisitCoroutineBodyStmt(const CoroutineBodyStmt *S) {
1369   VisitStmt(S);
1370 }
1371 
1372 void StmtProfiler::VisitCoreturnStmt(const CoreturnStmt *S) {
1373   VisitStmt(S);
1374 }
1375 
1376 void StmtProfiler::VisitCoawaitExpr(const CoawaitExpr *S) {
1377   VisitExpr(S);
1378 }
1379 
1380 void StmtProfiler::VisitCoyieldExpr(const CoyieldExpr *S) {
1381   VisitExpr(S);
1382 }
1383 
1384 void StmtProfiler::VisitOpaqueValueExpr(const OpaqueValueExpr *E) {
1385   VisitExpr(E);
1386 }
1387 
1388 void StmtProfiler::VisitTypoExpr(const TypoExpr *E) {
1389   VisitExpr(E);
1390 }
1391 
1392 void StmtProfiler::VisitObjCStringLiteral(const ObjCStringLiteral *S) {
1393   VisitExpr(S);
1394 }
1395 
1396 void StmtProfiler::VisitObjCBoxedExpr(const ObjCBoxedExpr *E) {
1397   VisitExpr(E);
1398 }
1399 
1400 void StmtProfiler::VisitObjCArrayLiteral(const ObjCArrayLiteral *E) {
1401   VisitExpr(E);
1402 }
1403 
1404 void StmtProfiler::VisitObjCDictionaryLiteral(const ObjCDictionaryLiteral *E) {
1405   VisitExpr(E);
1406 }
1407 
1408 void StmtProfiler::VisitObjCEncodeExpr(const ObjCEncodeExpr *S) {
1409   VisitExpr(S);
1410   VisitType(S->getEncodedType());
1411 }
1412 
1413 void StmtProfiler::VisitObjCSelectorExpr(const ObjCSelectorExpr *S) {
1414   VisitExpr(S);
1415   VisitName(S->getSelector());
1416 }
1417 
1418 void StmtProfiler::VisitObjCProtocolExpr(const ObjCProtocolExpr *S) {
1419   VisitExpr(S);
1420   VisitDecl(S->getProtocol());
1421 }
1422 
1423 void StmtProfiler::VisitObjCIvarRefExpr(const ObjCIvarRefExpr *S) {
1424   VisitExpr(S);
1425   VisitDecl(S->getDecl());
1426   ID.AddBoolean(S->isArrow());
1427   ID.AddBoolean(S->isFreeIvar());
1428 }
1429 
1430 void StmtProfiler::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *S) {
1431   VisitExpr(S);
1432   if (S->isImplicitProperty()) {
1433     VisitDecl(S->getImplicitPropertyGetter());
1434     VisitDecl(S->getImplicitPropertySetter());
1435   } else {
1436     VisitDecl(S->getExplicitProperty());
1437   }
1438   if (S->isSuperReceiver()) {
1439     ID.AddBoolean(S->isSuperReceiver());
1440     VisitType(S->getSuperReceiverType());
1441   }
1442 }
1443 
1444 void StmtProfiler::VisitObjCSubscriptRefExpr(const ObjCSubscriptRefExpr *S) {
1445   VisitExpr(S);
1446   VisitDecl(S->getAtIndexMethodDecl());
1447   VisitDecl(S->setAtIndexMethodDecl());
1448 }
1449 
1450 void StmtProfiler::VisitObjCMessageExpr(const ObjCMessageExpr *S) {
1451   VisitExpr(S);
1452   VisitName(S->getSelector());
1453   VisitDecl(S->getMethodDecl());
1454 }
1455 
1456 void StmtProfiler::VisitObjCIsaExpr(const ObjCIsaExpr *S) {
1457   VisitExpr(S);
1458   ID.AddBoolean(S->isArrow());
1459 }
1460 
1461 void StmtProfiler::VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *S) {
1462   VisitExpr(S);
1463   ID.AddBoolean(S->getValue());
1464 }
1465 
1466 void StmtProfiler::VisitObjCIndirectCopyRestoreExpr(
1467     const ObjCIndirectCopyRestoreExpr *S) {
1468   VisitExpr(S);
1469   ID.AddBoolean(S->shouldCopy());
1470 }
1471 
1472 void StmtProfiler::VisitObjCBridgedCastExpr(const ObjCBridgedCastExpr *S) {
1473   VisitExplicitCastExpr(S);
1474   ID.AddBoolean(S->getBridgeKind());
1475 }
1476 
1477 void StmtProfiler::VisitDecl(const Decl *D) {
1478   ID.AddInteger(D? D->getKind() : 0);
1479 
1480   if (Canonical && D) {
1481     if (const NonTypeTemplateParmDecl *NTTP =
1482           dyn_cast<NonTypeTemplateParmDecl>(D)) {
1483       ID.AddInteger(NTTP->getDepth());
1484       ID.AddInteger(NTTP->getIndex());
1485       ID.AddBoolean(NTTP->isParameterPack());
1486       VisitType(NTTP->getType());
1487       return;
1488     }
1489 
1490     if (const ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D)) {
1491       // The Itanium C++ ABI uses the type, scope depth, and scope
1492       // index of a parameter when mangling expressions that involve
1493       // function parameters, so we will use the parameter's type for
1494       // establishing function parameter identity. That way, our
1495       // definition of "equivalent" (per C++ [temp.over.link]) is at
1496       // least as strong as the definition of "equivalent" used for
1497       // name mangling.
1498       VisitType(Parm->getType());
1499       ID.AddInteger(Parm->getFunctionScopeDepth());
1500       ID.AddInteger(Parm->getFunctionScopeIndex());
1501       return;
1502     }
1503 
1504     if (const TemplateTypeParmDecl *TTP =
1505           dyn_cast<TemplateTypeParmDecl>(D)) {
1506       ID.AddInteger(TTP->getDepth());
1507       ID.AddInteger(TTP->getIndex());
1508       ID.AddBoolean(TTP->isParameterPack());
1509       return;
1510     }
1511 
1512     if (const TemplateTemplateParmDecl *TTP =
1513           dyn_cast<TemplateTemplateParmDecl>(D)) {
1514       ID.AddInteger(TTP->getDepth());
1515       ID.AddInteger(TTP->getIndex());
1516       ID.AddBoolean(TTP->isParameterPack());
1517       return;
1518     }
1519   }
1520 
1521   ID.AddPointer(D? D->getCanonicalDecl() : nullptr);
1522 }
1523 
1524 void StmtProfiler::VisitType(QualType T) {
1525   if (Canonical)
1526     T = Context.getCanonicalType(T);
1527 
1528   ID.AddPointer(T.getAsOpaquePtr());
1529 }
1530 
1531 void StmtProfiler::VisitName(DeclarationName Name) {
1532   ID.AddPointer(Name.getAsOpaquePtr());
1533 }
1534 
1535 void StmtProfiler::VisitNestedNameSpecifier(NestedNameSpecifier *NNS) {
1536   if (Canonical)
1537     NNS = Context.getCanonicalNestedNameSpecifier(NNS);
1538   ID.AddPointer(NNS);
1539 }
1540 
1541 void StmtProfiler::VisitTemplateName(TemplateName Name) {
1542   if (Canonical)
1543     Name = Context.getCanonicalTemplateName(Name);
1544 
1545   Name.Profile(ID);
1546 }
1547 
1548 void StmtProfiler::VisitTemplateArguments(const TemplateArgumentLoc *Args,
1549                                           unsigned NumArgs) {
1550   ID.AddInteger(NumArgs);
1551   for (unsigned I = 0; I != NumArgs; ++I)
1552     VisitTemplateArgument(Args[I].getArgument());
1553 }
1554 
1555 void StmtProfiler::VisitTemplateArgument(const TemplateArgument &Arg) {
1556   // Mostly repetitive with TemplateArgument::Profile!
1557   ID.AddInteger(Arg.getKind());
1558   switch (Arg.getKind()) {
1559   case TemplateArgument::Null:
1560     break;
1561 
1562   case TemplateArgument::Type:
1563     VisitType(Arg.getAsType());
1564     break;
1565 
1566   case TemplateArgument::Template:
1567   case TemplateArgument::TemplateExpansion:
1568     VisitTemplateName(Arg.getAsTemplateOrTemplatePattern());
1569     break;
1570 
1571   case TemplateArgument::Declaration:
1572     VisitDecl(Arg.getAsDecl());
1573     break;
1574 
1575   case TemplateArgument::NullPtr:
1576     VisitType(Arg.getNullPtrType());
1577     break;
1578 
1579   case TemplateArgument::Integral:
1580     Arg.getAsIntegral().Profile(ID);
1581     VisitType(Arg.getIntegralType());
1582     break;
1583 
1584   case TemplateArgument::Expression:
1585     Visit(Arg.getAsExpr());
1586     break;
1587 
1588   case TemplateArgument::Pack:
1589     for (const auto &P : Arg.pack_elements())
1590       VisitTemplateArgument(P);
1591     break;
1592   }
1593 }
1594 
1595 void Stmt::Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
1596                    bool Canonical) const {
1597   StmtProfiler Profiler(ID, Context, Canonical);
1598   Profiler.Visit(this);
1599 }
1600