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 
266 public:
267   OMPClauseProfiler(StmtProfiler *P) : Profiler(P) { }
268 #define OPENMP_CLAUSE(Name, Class)                                             \
269   void Visit##Class(const Class *C);
270 #include "clang/Basic/OpenMPKinds.def"
271 };
272 
273 void OMPClauseProfiler::VisitOMPIfClause(const OMPIfClause *C) {
274   if (C->getCondition())
275     Profiler->VisitStmt(C->getCondition());
276 }
277 
278 void OMPClauseProfiler::VisitOMPFinalClause(const OMPFinalClause *C) {
279   if (C->getCondition())
280     Profiler->VisitStmt(C->getCondition());
281 }
282 
283 void OMPClauseProfiler::VisitOMPNumThreadsClause(const OMPNumThreadsClause *C) {
284   if (C->getNumThreads())
285     Profiler->VisitStmt(C->getNumThreads());
286 }
287 
288 void OMPClauseProfiler::VisitOMPSafelenClause(const OMPSafelenClause *C) {
289   if (C->getSafelen())
290     Profiler->VisitStmt(C->getSafelen());
291 }
292 
293 void OMPClauseProfiler::VisitOMPSimdlenClause(const OMPSimdlenClause *C) {
294   if (C->getSimdlen())
295     Profiler->VisitStmt(C->getSimdlen());
296 }
297 
298 void OMPClauseProfiler::VisitOMPCollapseClause(const OMPCollapseClause *C) {
299   if (C->getNumForLoops())
300     Profiler->VisitStmt(C->getNumForLoops());
301 }
302 
303 void OMPClauseProfiler::VisitOMPDefaultClause(const OMPDefaultClause *C) { }
304 
305 void OMPClauseProfiler::VisitOMPProcBindClause(const OMPProcBindClause *C) { }
306 
307 void OMPClauseProfiler::VisitOMPScheduleClause(const OMPScheduleClause *C) {
308   if (C->getChunkSize()) {
309     Profiler->VisitStmt(C->getChunkSize());
310     if (C->getHelperChunkSize()) {
311       Profiler->VisitStmt(C->getChunkSize());
312     }
313   }
314 }
315 
316 void OMPClauseProfiler::VisitOMPOrderedClause(const OMPOrderedClause *C) {
317   if (auto *Num = C->getNumForLoops())
318     Profiler->VisitStmt(Num);
319 }
320 
321 void OMPClauseProfiler::VisitOMPNowaitClause(const OMPNowaitClause *) {}
322 
323 void OMPClauseProfiler::VisitOMPUntiedClause(const OMPUntiedClause *) {}
324 
325 void OMPClauseProfiler::VisitOMPMergeableClause(const OMPMergeableClause *) {}
326 
327 void OMPClauseProfiler::VisitOMPReadClause(const OMPReadClause *) {}
328 
329 void OMPClauseProfiler::VisitOMPWriteClause(const OMPWriteClause *) {}
330 
331 void OMPClauseProfiler::VisitOMPUpdateClause(const OMPUpdateClause *) {}
332 
333 void OMPClauseProfiler::VisitOMPCaptureClause(const OMPCaptureClause *) {}
334 
335 void OMPClauseProfiler::VisitOMPSeqCstClause(const OMPSeqCstClause *) {}
336 
337 void OMPClauseProfiler::VisitOMPThreadsClause(const OMPThreadsClause *) {}
338 
339 void OMPClauseProfiler::VisitOMPSIMDClause(const OMPSIMDClause *) {}
340 
341 void OMPClauseProfiler::VisitOMPNogroupClause(const OMPNogroupClause *) {}
342 
343 template<typename T>
344 void OMPClauseProfiler::VisitOMPClauseList(T *Node) {
345   for (auto *E : Node->varlists()) {
346     Profiler->VisitStmt(E);
347   }
348 }
349 
350 void OMPClauseProfiler::VisitOMPPrivateClause(const OMPPrivateClause *C) {
351   VisitOMPClauseList(C);
352   for (auto *E : C->private_copies()) {
353     Profiler->VisitStmt(E);
354   }
355 }
356 void
357 OMPClauseProfiler::VisitOMPFirstprivateClause(const OMPFirstprivateClause *C) {
358   VisitOMPClauseList(C);
359   for (auto *E : C->private_copies()) {
360     Profiler->VisitStmt(E);
361   }
362   for (auto *E : C->inits()) {
363     Profiler->VisitStmt(E);
364   }
365 }
366 void
367 OMPClauseProfiler::VisitOMPLastprivateClause(const OMPLastprivateClause *C) {
368   VisitOMPClauseList(C);
369   for (auto *E : C->source_exprs()) {
370     Profiler->VisitStmt(E);
371   }
372   for (auto *E : C->destination_exprs()) {
373     Profiler->VisitStmt(E);
374   }
375   for (auto *E : C->assignment_ops()) {
376     Profiler->VisitStmt(E);
377   }
378 }
379 void OMPClauseProfiler::VisitOMPSharedClause(const OMPSharedClause *C) {
380   VisitOMPClauseList(C);
381 }
382 void OMPClauseProfiler::VisitOMPReductionClause(
383                                          const OMPReductionClause *C) {
384   Profiler->VisitNestedNameSpecifier(
385       C->getQualifierLoc().getNestedNameSpecifier());
386   Profiler->VisitName(C->getNameInfo().getName());
387   VisitOMPClauseList(C);
388   for (auto *E : C->privates()) {
389     Profiler->VisitStmt(E);
390   }
391   for (auto *E : C->lhs_exprs()) {
392     Profiler->VisitStmt(E);
393   }
394   for (auto *E : C->rhs_exprs()) {
395     Profiler->VisitStmt(E);
396   }
397   for (auto *E : C->reduction_ops()) {
398     Profiler->VisitStmt(E);
399   }
400 }
401 void OMPClauseProfiler::VisitOMPLinearClause(const OMPLinearClause *C) {
402   VisitOMPClauseList(C);
403   for (auto *E : C->privates()) {
404     Profiler->VisitStmt(E);
405   }
406   for (auto *E : C->inits()) {
407     Profiler->VisitStmt(E);
408   }
409   for (auto *E : C->updates()) {
410     Profiler->VisitStmt(E);
411   }
412   for (auto *E : C->finals()) {
413     Profiler->VisitStmt(E);
414   }
415   Profiler->VisitStmt(C->getStep());
416   Profiler->VisitStmt(C->getCalcStep());
417 }
418 void OMPClauseProfiler::VisitOMPAlignedClause(const OMPAlignedClause *C) {
419   VisitOMPClauseList(C);
420   Profiler->VisitStmt(C->getAlignment());
421 }
422 void OMPClauseProfiler::VisitOMPCopyinClause(const OMPCopyinClause *C) {
423   VisitOMPClauseList(C);
424   for (auto *E : C->source_exprs()) {
425     Profiler->VisitStmt(E);
426   }
427   for (auto *E : C->destination_exprs()) {
428     Profiler->VisitStmt(E);
429   }
430   for (auto *E : C->assignment_ops()) {
431     Profiler->VisitStmt(E);
432   }
433 }
434 void
435 OMPClauseProfiler::VisitOMPCopyprivateClause(const OMPCopyprivateClause *C) {
436   VisitOMPClauseList(C);
437   for (auto *E : C->source_exprs()) {
438     Profiler->VisitStmt(E);
439   }
440   for (auto *E : C->destination_exprs()) {
441     Profiler->VisitStmt(E);
442   }
443   for (auto *E : C->assignment_ops()) {
444     Profiler->VisitStmt(E);
445   }
446 }
447 void OMPClauseProfiler::VisitOMPFlushClause(const OMPFlushClause *C) {
448   VisitOMPClauseList(C);
449 }
450 void OMPClauseProfiler::VisitOMPDependClause(const OMPDependClause *C) {
451   VisitOMPClauseList(C);
452 }
453 void OMPClauseProfiler::VisitOMPDeviceClause(const OMPDeviceClause *C) {
454   Profiler->VisitStmt(C->getDevice());
455 }
456 void OMPClauseProfiler::VisitOMPMapClause(const OMPMapClause *C) {
457   VisitOMPClauseList(C);
458 }
459 void OMPClauseProfiler::VisitOMPNumTeamsClause(const OMPNumTeamsClause *C) {
460   Profiler->VisitStmt(C->getNumTeams());
461 }
462 void OMPClauseProfiler::VisitOMPThreadLimitClause(
463     const OMPThreadLimitClause *C) {
464   Profiler->VisitStmt(C->getThreadLimit());
465 }
466 void OMPClauseProfiler::VisitOMPPriorityClause(const OMPPriorityClause *C) {
467   Profiler->VisitStmt(C->getPriority());
468 }
469 void OMPClauseProfiler::VisitOMPGrainsizeClause(const OMPGrainsizeClause *C) {
470   Profiler->VisitStmt(C->getGrainsize());
471 }
472 void OMPClauseProfiler::VisitOMPNumTasksClause(const OMPNumTasksClause *C) {
473   Profiler->VisitStmt(C->getNumTasks());
474 }
475 }
476 
477 void
478 StmtProfiler::VisitOMPExecutableDirective(const OMPExecutableDirective *S) {
479   VisitStmt(S);
480   OMPClauseProfiler P(this);
481   ArrayRef<OMPClause *> Clauses = S->clauses();
482   for (ArrayRef<OMPClause *>::iterator I = Clauses.begin(), E = Clauses.end();
483        I != E; ++I)
484     if (*I)
485       P.Visit(*I);
486 }
487 
488 void StmtProfiler::VisitOMPLoopDirective(const OMPLoopDirective *S) {
489   VisitOMPExecutableDirective(S);
490 }
491 
492 void StmtProfiler::VisitOMPParallelDirective(const OMPParallelDirective *S) {
493   VisitOMPExecutableDirective(S);
494 }
495 
496 void StmtProfiler::VisitOMPSimdDirective(const OMPSimdDirective *S) {
497   VisitOMPLoopDirective(S);
498 }
499 
500 void StmtProfiler::VisitOMPForDirective(const OMPForDirective *S) {
501   VisitOMPLoopDirective(S);
502 }
503 
504 void StmtProfiler::VisitOMPForSimdDirective(const OMPForSimdDirective *S) {
505   VisitOMPLoopDirective(S);
506 }
507 
508 void StmtProfiler::VisitOMPSectionsDirective(const OMPSectionsDirective *S) {
509   VisitOMPExecutableDirective(S);
510 }
511 
512 void StmtProfiler::VisitOMPSectionDirective(const OMPSectionDirective *S) {
513   VisitOMPExecutableDirective(S);
514 }
515 
516 void StmtProfiler::VisitOMPSingleDirective(const OMPSingleDirective *S) {
517   VisitOMPExecutableDirective(S);
518 }
519 
520 void StmtProfiler::VisitOMPMasterDirective(const OMPMasterDirective *S) {
521   VisitOMPExecutableDirective(S);
522 }
523 
524 void StmtProfiler::VisitOMPCriticalDirective(const OMPCriticalDirective *S) {
525   VisitOMPExecutableDirective(S);
526   VisitName(S->getDirectiveName().getName());
527 }
528 
529 void
530 StmtProfiler::VisitOMPParallelForDirective(const OMPParallelForDirective *S) {
531   VisitOMPLoopDirective(S);
532 }
533 
534 void StmtProfiler::VisitOMPParallelForSimdDirective(
535     const OMPParallelForSimdDirective *S) {
536   VisitOMPLoopDirective(S);
537 }
538 
539 void StmtProfiler::VisitOMPParallelSectionsDirective(
540     const OMPParallelSectionsDirective *S) {
541   VisitOMPExecutableDirective(S);
542 }
543 
544 void StmtProfiler::VisitOMPTaskDirective(const OMPTaskDirective *S) {
545   VisitOMPExecutableDirective(S);
546 }
547 
548 void StmtProfiler::VisitOMPTaskyieldDirective(const OMPTaskyieldDirective *S) {
549   VisitOMPExecutableDirective(S);
550 }
551 
552 void StmtProfiler::VisitOMPBarrierDirective(const OMPBarrierDirective *S) {
553   VisitOMPExecutableDirective(S);
554 }
555 
556 void StmtProfiler::VisitOMPTaskwaitDirective(const OMPTaskwaitDirective *S) {
557   VisitOMPExecutableDirective(S);
558 }
559 
560 void StmtProfiler::VisitOMPTaskgroupDirective(const OMPTaskgroupDirective *S) {
561   VisitOMPExecutableDirective(S);
562 }
563 
564 void StmtProfiler::VisitOMPFlushDirective(const OMPFlushDirective *S) {
565   VisitOMPExecutableDirective(S);
566 }
567 
568 void StmtProfiler::VisitOMPOrderedDirective(const OMPOrderedDirective *S) {
569   VisitOMPExecutableDirective(S);
570 }
571 
572 void StmtProfiler::VisitOMPAtomicDirective(const OMPAtomicDirective *S) {
573   VisitOMPExecutableDirective(S);
574 }
575 
576 void StmtProfiler::VisitOMPTargetDirective(const OMPTargetDirective *S) {
577   VisitOMPExecutableDirective(S);
578 }
579 
580 void StmtProfiler::VisitOMPTargetDataDirective(const OMPTargetDataDirective *S) {
581   VisitOMPExecutableDirective(S);
582 }
583 
584 void StmtProfiler::VisitOMPTeamsDirective(const OMPTeamsDirective *S) {
585   VisitOMPExecutableDirective(S);
586 }
587 
588 void StmtProfiler::VisitOMPCancellationPointDirective(
589     const OMPCancellationPointDirective *S) {
590   VisitOMPExecutableDirective(S);
591 }
592 
593 void StmtProfiler::VisitOMPCancelDirective(const OMPCancelDirective *S) {
594   VisitOMPExecutableDirective(S);
595 }
596 
597 void StmtProfiler::VisitOMPTaskLoopDirective(const OMPTaskLoopDirective *S) {
598   VisitOMPLoopDirective(S);
599 }
600 
601 void StmtProfiler::VisitOMPTaskLoopSimdDirective(
602     const OMPTaskLoopSimdDirective *S) {
603   VisitOMPLoopDirective(S);
604 }
605 
606 void StmtProfiler::VisitExpr(const Expr *S) {
607   VisitStmt(S);
608 }
609 
610 void StmtProfiler::VisitDeclRefExpr(const DeclRefExpr *S) {
611   VisitExpr(S);
612   if (!Canonical)
613     VisitNestedNameSpecifier(S->getQualifier());
614   VisitDecl(S->getDecl());
615   if (!Canonical)
616     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
617 }
618 
619 void StmtProfiler::VisitPredefinedExpr(const PredefinedExpr *S) {
620   VisitExpr(S);
621   ID.AddInteger(S->getIdentType());
622 }
623 
624 void StmtProfiler::VisitIntegerLiteral(const IntegerLiteral *S) {
625   VisitExpr(S);
626   S->getValue().Profile(ID);
627   ID.AddInteger(S->getType()->castAs<BuiltinType>()->getKind());
628 }
629 
630 void StmtProfiler::VisitCharacterLiteral(const CharacterLiteral *S) {
631   VisitExpr(S);
632   ID.AddInteger(S->getKind());
633   ID.AddInteger(S->getValue());
634 }
635 
636 void StmtProfiler::VisitFloatingLiteral(const FloatingLiteral *S) {
637   VisitExpr(S);
638   S->getValue().Profile(ID);
639   ID.AddBoolean(S->isExact());
640   ID.AddInteger(S->getType()->castAs<BuiltinType>()->getKind());
641 }
642 
643 void StmtProfiler::VisitImaginaryLiteral(const ImaginaryLiteral *S) {
644   VisitExpr(S);
645 }
646 
647 void StmtProfiler::VisitStringLiteral(const StringLiteral *S) {
648   VisitExpr(S);
649   ID.AddString(S->getBytes());
650   ID.AddInteger(S->getKind());
651 }
652 
653 void StmtProfiler::VisitParenExpr(const ParenExpr *S) {
654   VisitExpr(S);
655 }
656 
657 void StmtProfiler::VisitParenListExpr(const ParenListExpr *S) {
658   VisitExpr(S);
659 }
660 
661 void StmtProfiler::VisitUnaryOperator(const UnaryOperator *S) {
662   VisitExpr(S);
663   ID.AddInteger(S->getOpcode());
664 }
665 
666 void StmtProfiler::VisitOffsetOfExpr(const OffsetOfExpr *S) {
667   VisitType(S->getTypeSourceInfo()->getType());
668   unsigned n = S->getNumComponents();
669   for (unsigned i = 0; i < n; ++i) {
670     const OffsetOfExpr::OffsetOfNode& ON = S->getComponent(i);
671     ID.AddInteger(ON.getKind());
672     switch (ON.getKind()) {
673     case OffsetOfExpr::OffsetOfNode::Array:
674       // Expressions handled below.
675       break;
676 
677     case OffsetOfExpr::OffsetOfNode::Field:
678       VisitDecl(ON.getField());
679       break;
680 
681     case OffsetOfExpr::OffsetOfNode::Identifier:
682       ID.AddPointer(ON.getFieldName());
683       break;
684 
685     case OffsetOfExpr::OffsetOfNode::Base:
686       // These nodes are implicit, and therefore don't need profiling.
687       break;
688     }
689   }
690 
691   VisitExpr(S);
692 }
693 
694 void
695 StmtProfiler::VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *S) {
696   VisitExpr(S);
697   ID.AddInteger(S->getKind());
698   if (S->isArgumentType())
699     VisitType(S->getArgumentType());
700 }
701 
702 void StmtProfiler::VisitArraySubscriptExpr(const ArraySubscriptExpr *S) {
703   VisitExpr(S);
704 }
705 
706 void StmtProfiler::VisitOMPArraySectionExpr(const OMPArraySectionExpr *S) {
707   VisitExpr(S);
708 }
709 
710 void StmtProfiler::VisitCallExpr(const CallExpr *S) {
711   VisitExpr(S);
712 }
713 
714 void StmtProfiler::VisitMemberExpr(const MemberExpr *S) {
715   VisitExpr(S);
716   VisitDecl(S->getMemberDecl());
717   if (!Canonical)
718     VisitNestedNameSpecifier(S->getQualifier());
719   ID.AddBoolean(S->isArrow());
720 }
721 
722 void StmtProfiler::VisitCompoundLiteralExpr(const CompoundLiteralExpr *S) {
723   VisitExpr(S);
724   ID.AddBoolean(S->isFileScope());
725 }
726 
727 void StmtProfiler::VisitCastExpr(const CastExpr *S) {
728   VisitExpr(S);
729 }
730 
731 void StmtProfiler::VisitImplicitCastExpr(const ImplicitCastExpr *S) {
732   VisitCastExpr(S);
733   ID.AddInteger(S->getValueKind());
734 }
735 
736 void StmtProfiler::VisitExplicitCastExpr(const ExplicitCastExpr *S) {
737   VisitCastExpr(S);
738   VisitType(S->getTypeAsWritten());
739 }
740 
741 void StmtProfiler::VisitCStyleCastExpr(const CStyleCastExpr *S) {
742   VisitExplicitCastExpr(S);
743 }
744 
745 void StmtProfiler::VisitBinaryOperator(const BinaryOperator *S) {
746   VisitExpr(S);
747   ID.AddInteger(S->getOpcode());
748 }
749 
750 void
751 StmtProfiler::VisitCompoundAssignOperator(const CompoundAssignOperator *S) {
752   VisitBinaryOperator(S);
753 }
754 
755 void StmtProfiler::VisitConditionalOperator(const ConditionalOperator *S) {
756   VisitExpr(S);
757 }
758 
759 void StmtProfiler::VisitBinaryConditionalOperator(
760     const BinaryConditionalOperator *S) {
761   VisitExpr(S);
762 }
763 
764 void StmtProfiler::VisitAddrLabelExpr(const AddrLabelExpr *S) {
765   VisitExpr(S);
766   VisitDecl(S->getLabel());
767 }
768 
769 void StmtProfiler::VisitStmtExpr(const StmtExpr *S) {
770   VisitExpr(S);
771 }
772 
773 void StmtProfiler::VisitShuffleVectorExpr(const ShuffleVectorExpr *S) {
774   VisitExpr(S);
775 }
776 
777 void StmtProfiler::VisitConvertVectorExpr(const ConvertVectorExpr *S) {
778   VisitExpr(S);
779 }
780 
781 void StmtProfiler::VisitChooseExpr(const ChooseExpr *S) {
782   VisitExpr(S);
783 }
784 
785 void StmtProfiler::VisitGNUNullExpr(const GNUNullExpr *S) {
786   VisitExpr(S);
787 }
788 
789 void StmtProfiler::VisitVAArgExpr(const VAArgExpr *S) {
790   VisitExpr(S);
791 }
792 
793 void StmtProfiler::VisitInitListExpr(const InitListExpr *S) {
794   if (S->getSyntacticForm()) {
795     VisitInitListExpr(S->getSyntacticForm());
796     return;
797   }
798 
799   VisitExpr(S);
800 }
801 
802 void StmtProfiler::VisitDesignatedInitExpr(const DesignatedInitExpr *S) {
803   VisitExpr(S);
804   ID.AddBoolean(S->usesGNUSyntax());
805   for (DesignatedInitExpr::const_designators_iterator D =
806          S->designators_begin(), DEnd = S->designators_end();
807        D != DEnd; ++D) {
808     if (D->isFieldDesignator()) {
809       ID.AddInteger(0);
810       VisitName(D->getFieldName());
811       continue;
812     }
813 
814     if (D->isArrayDesignator()) {
815       ID.AddInteger(1);
816     } else {
817       assert(D->isArrayRangeDesignator());
818       ID.AddInteger(2);
819     }
820     ID.AddInteger(D->getFirstExprIndex());
821   }
822 }
823 
824 // Seems that if VisitInitListExpr() only works on the syntactic form of an
825 // InitListExpr, then a DesignatedInitUpdateExpr is not encountered.
826 void StmtProfiler::VisitDesignatedInitUpdateExpr(
827     const DesignatedInitUpdateExpr *S) {
828   llvm_unreachable("Unexpected DesignatedInitUpdateExpr in syntactic form of "
829                    "initializer");
830 }
831 
832 void StmtProfiler::VisitNoInitExpr(const NoInitExpr *S) {
833   llvm_unreachable("Unexpected NoInitExpr in syntactic form of initializer");
834 }
835 
836 void StmtProfiler::VisitImplicitValueInitExpr(const ImplicitValueInitExpr *S) {
837   VisitExpr(S);
838 }
839 
840 void StmtProfiler::VisitExtVectorElementExpr(const ExtVectorElementExpr *S) {
841   VisitExpr(S);
842   VisitName(&S->getAccessor());
843 }
844 
845 void StmtProfiler::VisitBlockExpr(const BlockExpr *S) {
846   VisitExpr(S);
847   VisitDecl(S->getBlockDecl());
848 }
849 
850 void StmtProfiler::VisitGenericSelectionExpr(const GenericSelectionExpr *S) {
851   VisitExpr(S);
852   for (unsigned i = 0; i != S->getNumAssocs(); ++i) {
853     QualType T = S->getAssocType(i);
854     if (T.isNull())
855       ID.AddPointer(nullptr);
856     else
857       VisitType(T);
858     VisitExpr(S->getAssocExpr(i));
859   }
860 }
861 
862 void StmtProfiler::VisitPseudoObjectExpr(const PseudoObjectExpr *S) {
863   VisitExpr(S);
864   for (PseudoObjectExpr::const_semantics_iterator
865          i = S->semantics_begin(), e = S->semantics_end(); i != e; ++i)
866     // Normally, we would not profile the source expressions of OVEs.
867     if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(*i))
868       Visit(OVE->getSourceExpr());
869 }
870 
871 void StmtProfiler::VisitAtomicExpr(const AtomicExpr *S) {
872   VisitExpr(S);
873   ID.AddInteger(S->getOp());
874 }
875 
876 static Stmt::StmtClass DecodeOperatorCall(const CXXOperatorCallExpr *S,
877                                           UnaryOperatorKind &UnaryOp,
878                                           BinaryOperatorKind &BinaryOp) {
879   switch (S->getOperator()) {
880   case OO_None:
881   case OO_New:
882   case OO_Delete:
883   case OO_Array_New:
884   case OO_Array_Delete:
885   case OO_Arrow:
886   case OO_Call:
887   case OO_Conditional:
888   case OO_Coawait:
889   case NUM_OVERLOADED_OPERATORS:
890     llvm_unreachable("Invalid operator call kind");
891 
892   case OO_Plus:
893     if (S->getNumArgs() == 1) {
894       UnaryOp = UO_Plus;
895       return Stmt::UnaryOperatorClass;
896     }
897 
898     BinaryOp = BO_Add;
899     return Stmt::BinaryOperatorClass;
900 
901   case OO_Minus:
902     if (S->getNumArgs() == 1) {
903       UnaryOp = UO_Minus;
904       return Stmt::UnaryOperatorClass;
905     }
906 
907     BinaryOp = BO_Sub;
908     return Stmt::BinaryOperatorClass;
909 
910   case OO_Star:
911     if (S->getNumArgs() == 1) {
912       UnaryOp = UO_Deref;
913       return Stmt::UnaryOperatorClass;
914     }
915 
916     BinaryOp = BO_Mul;
917     return Stmt::BinaryOperatorClass;
918 
919   case OO_Slash:
920     BinaryOp = BO_Div;
921     return Stmt::BinaryOperatorClass;
922 
923   case OO_Percent:
924     BinaryOp = BO_Rem;
925     return Stmt::BinaryOperatorClass;
926 
927   case OO_Caret:
928     BinaryOp = BO_Xor;
929     return Stmt::BinaryOperatorClass;
930 
931   case OO_Amp:
932     if (S->getNumArgs() == 1) {
933       UnaryOp = UO_AddrOf;
934       return Stmt::UnaryOperatorClass;
935     }
936 
937     BinaryOp = BO_And;
938     return Stmt::BinaryOperatorClass;
939 
940   case OO_Pipe:
941     BinaryOp = BO_Or;
942     return Stmt::BinaryOperatorClass;
943 
944   case OO_Tilde:
945     UnaryOp = UO_Not;
946     return Stmt::UnaryOperatorClass;
947 
948   case OO_Exclaim:
949     UnaryOp = UO_LNot;
950     return Stmt::UnaryOperatorClass;
951 
952   case OO_Equal:
953     BinaryOp = BO_Assign;
954     return Stmt::BinaryOperatorClass;
955 
956   case OO_Less:
957     BinaryOp = BO_LT;
958     return Stmt::BinaryOperatorClass;
959 
960   case OO_Greater:
961     BinaryOp = BO_GT;
962     return Stmt::BinaryOperatorClass;
963 
964   case OO_PlusEqual:
965     BinaryOp = BO_AddAssign;
966     return Stmt::CompoundAssignOperatorClass;
967 
968   case OO_MinusEqual:
969     BinaryOp = BO_SubAssign;
970     return Stmt::CompoundAssignOperatorClass;
971 
972   case OO_StarEqual:
973     BinaryOp = BO_MulAssign;
974     return Stmt::CompoundAssignOperatorClass;
975 
976   case OO_SlashEqual:
977     BinaryOp = BO_DivAssign;
978     return Stmt::CompoundAssignOperatorClass;
979 
980   case OO_PercentEqual:
981     BinaryOp = BO_RemAssign;
982     return Stmt::CompoundAssignOperatorClass;
983 
984   case OO_CaretEqual:
985     BinaryOp = BO_XorAssign;
986     return Stmt::CompoundAssignOperatorClass;
987 
988   case OO_AmpEqual:
989     BinaryOp = BO_AndAssign;
990     return Stmt::CompoundAssignOperatorClass;
991 
992   case OO_PipeEqual:
993     BinaryOp = BO_OrAssign;
994     return Stmt::CompoundAssignOperatorClass;
995 
996   case OO_LessLess:
997     BinaryOp = BO_Shl;
998     return Stmt::BinaryOperatorClass;
999 
1000   case OO_GreaterGreater:
1001     BinaryOp = BO_Shr;
1002     return Stmt::BinaryOperatorClass;
1003 
1004   case OO_LessLessEqual:
1005     BinaryOp = BO_ShlAssign;
1006     return Stmt::CompoundAssignOperatorClass;
1007 
1008   case OO_GreaterGreaterEqual:
1009     BinaryOp = BO_ShrAssign;
1010     return Stmt::CompoundAssignOperatorClass;
1011 
1012   case OO_EqualEqual:
1013     BinaryOp = BO_EQ;
1014     return Stmt::BinaryOperatorClass;
1015 
1016   case OO_ExclaimEqual:
1017     BinaryOp = BO_NE;
1018     return Stmt::BinaryOperatorClass;
1019 
1020   case OO_LessEqual:
1021     BinaryOp = BO_LE;
1022     return Stmt::BinaryOperatorClass;
1023 
1024   case OO_GreaterEqual:
1025     BinaryOp = BO_GE;
1026     return Stmt::BinaryOperatorClass;
1027 
1028   case OO_AmpAmp:
1029     BinaryOp = BO_LAnd;
1030     return Stmt::BinaryOperatorClass;
1031 
1032   case OO_PipePipe:
1033     BinaryOp = BO_LOr;
1034     return Stmt::BinaryOperatorClass;
1035 
1036   case OO_PlusPlus:
1037     UnaryOp = S->getNumArgs() == 1? UO_PreInc
1038                                   : UO_PostInc;
1039     return Stmt::UnaryOperatorClass;
1040 
1041   case OO_MinusMinus:
1042     UnaryOp = S->getNumArgs() == 1? UO_PreDec
1043                                   : UO_PostDec;
1044     return Stmt::UnaryOperatorClass;
1045 
1046   case OO_Comma:
1047     BinaryOp = BO_Comma;
1048     return Stmt::BinaryOperatorClass;
1049 
1050   case OO_ArrowStar:
1051     BinaryOp = BO_PtrMemI;
1052     return Stmt::BinaryOperatorClass;
1053 
1054   case OO_Subscript:
1055     return Stmt::ArraySubscriptExprClass;
1056   }
1057 
1058   llvm_unreachable("Invalid overloaded operator expression");
1059 }
1060 
1061 void StmtProfiler::VisitCXXOperatorCallExpr(const CXXOperatorCallExpr *S) {
1062   if (S->isTypeDependent()) {
1063     // Type-dependent operator calls are profiled like their underlying
1064     // syntactic operator.
1065     UnaryOperatorKind UnaryOp = UO_Extension;
1066     BinaryOperatorKind BinaryOp = BO_Comma;
1067     Stmt::StmtClass SC = DecodeOperatorCall(S, UnaryOp, BinaryOp);
1068 
1069     ID.AddInteger(SC);
1070     for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
1071       Visit(S->getArg(I));
1072     if (SC == Stmt::UnaryOperatorClass)
1073       ID.AddInteger(UnaryOp);
1074     else if (SC == Stmt::BinaryOperatorClass ||
1075              SC == Stmt::CompoundAssignOperatorClass)
1076       ID.AddInteger(BinaryOp);
1077     else
1078       assert(SC == Stmt::ArraySubscriptExprClass);
1079 
1080     return;
1081   }
1082 
1083   VisitCallExpr(S);
1084   ID.AddInteger(S->getOperator());
1085 }
1086 
1087 void StmtProfiler::VisitCXXMemberCallExpr(const CXXMemberCallExpr *S) {
1088   VisitCallExpr(S);
1089 }
1090 
1091 void StmtProfiler::VisitCUDAKernelCallExpr(const CUDAKernelCallExpr *S) {
1092   VisitCallExpr(S);
1093 }
1094 
1095 void StmtProfiler::VisitAsTypeExpr(const AsTypeExpr *S) {
1096   VisitExpr(S);
1097 }
1098 
1099 void StmtProfiler::VisitCXXNamedCastExpr(const CXXNamedCastExpr *S) {
1100   VisitExplicitCastExpr(S);
1101 }
1102 
1103 void StmtProfiler::VisitCXXStaticCastExpr(const CXXStaticCastExpr *S) {
1104   VisitCXXNamedCastExpr(S);
1105 }
1106 
1107 void StmtProfiler::VisitCXXDynamicCastExpr(const CXXDynamicCastExpr *S) {
1108   VisitCXXNamedCastExpr(S);
1109 }
1110 
1111 void
1112 StmtProfiler::VisitCXXReinterpretCastExpr(const CXXReinterpretCastExpr *S) {
1113   VisitCXXNamedCastExpr(S);
1114 }
1115 
1116 void StmtProfiler::VisitCXXConstCastExpr(const CXXConstCastExpr *S) {
1117   VisitCXXNamedCastExpr(S);
1118 }
1119 
1120 void StmtProfiler::VisitUserDefinedLiteral(const UserDefinedLiteral *S) {
1121   VisitCallExpr(S);
1122 }
1123 
1124 void StmtProfiler::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *S) {
1125   VisitExpr(S);
1126   ID.AddBoolean(S->getValue());
1127 }
1128 
1129 void StmtProfiler::VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *S) {
1130   VisitExpr(S);
1131 }
1132 
1133 void StmtProfiler::VisitCXXStdInitializerListExpr(
1134     const CXXStdInitializerListExpr *S) {
1135   VisitExpr(S);
1136 }
1137 
1138 void StmtProfiler::VisitCXXTypeidExpr(const CXXTypeidExpr *S) {
1139   VisitExpr(S);
1140   if (S->isTypeOperand())
1141     VisitType(S->getTypeOperandSourceInfo()->getType());
1142 }
1143 
1144 void StmtProfiler::VisitCXXUuidofExpr(const CXXUuidofExpr *S) {
1145   VisitExpr(S);
1146   if (S->isTypeOperand())
1147     VisitType(S->getTypeOperandSourceInfo()->getType());
1148 }
1149 
1150 void StmtProfiler::VisitMSPropertyRefExpr(const MSPropertyRefExpr *S) {
1151   VisitExpr(S);
1152   VisitDecl(S->getPropertyDecl());
1153 }
1154 
1155 void StmtProfiler::VisitMSPropertySubscriptExpr(
1156     const MSPropertySubscriptExpr *S) {
1157   VisitExpr(S);
1158 }
1159 
1160 void StmtProfiler::VisitCXXThisExpr(const CXXThisExpr *S) {
1161   VisitExpr(S);
1162   ID.AddBoolean(S->isImplicit());
1163 }
1164 
1165 void StmtProfiler::VisitCXXThrowExpr(const CXXThrowExpr *S) {
1166   VisitExpr(S);
1167 }
1168 
1169 void StmtProfiler::VisitCXXDefaultArgExpr(const CXXDefaultArgExpr *S) {
1170   VisitExpr(S);
1171   VisitDecl(S->getParam());
1172 }
1173 
1174 void StmtProfiler::VisitCXXDefaultInitExpr(const CXXDefaultInitExpr *S) {
1175   VisitExpr(S);
1176   VisitDecl(S->getField());
1177 }
1178 
1179 void StmtProfiler::VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *S) {
1180   VisitExpr(S);
1181   VisitDecl(
1182          const_cast<CXXDestructorDecl *>(S->getTemporary()->getDestructor()));
1183 }
1184 
1185 void StmtProfiler::VisitCXXConstructExpr(const CXXConstructExpr *S) {
1186   VisitExpr(S);
1187   VisitDecl(S->getConstructor());
1188   ID.AddBoolean(S->isElidable());
1189 }
1190 
1191 void StmtProfiler::VisitCXXFunctionalCastExpr(const CXXFunctionalCastExpr *S) {
1192   VisitExplicitCastExpr(S);
1193 }
1194 
1195 void
1196 StmtProfiler::VisitCXXTemporaryObjectExpr(const CXXTemporaryObjectExpr *S) {
1197   VisitCXXConstructExpr(S);
1198 }
1199 
1200 void
1201 StmtProfiler::VisitLambdaExpr(const LambdaExpr *S) {
1202   VisitExpr(S);
1203   for (LambdaExpr::capture_iterator C = S->explicit_capture_begin(),
1204                                  CEnd = S->explicit_capture_end();
1205        C != CEnd; ++C) {
1206     ID.AddInteger(C->getCaptureKind());
1207     switch (C->getCaptureKind()) {
1208     case LCK_This:
1209       break;
1210     case LCK_ByRef:
1211     case LCK_ByCopy:
1212       VisitDecl(C->getCapturedVar());
1213       ID.AddBoolean(C->isPackExpansion());
1214       break;
1215     case LCK_VLAType:
1216       llvm_unreachable("VLA type in explicit captures.");
1217     }
1218   }
1219   // Note: If we actually needed to be able to match lambda
1220   // expressions, we would have to consider parameters and return type
1221   // here, among other things.
1222   VisitStmt(S->getBody());
1223 }
1224 
1225 void
1226 StmtProfiler::VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *S) {
1227   VisitExpr(S);
1228 }
1229 
1230 void StmtProfiler::VisitCXXDeleteExpr(const CXXDeleteExpr *S) {
1231   VisitExpr(S);
1232   ID.AddBoolean(S->isGlobalDelete());
1233   ID.AddBoolean(S->isArrayForm());
1234   VisitDecl(S->getOperatorDelete());
1235 }
1236 
1237 void StmtProfiler::VisitCXXNewExpr(const CXXNewExpr *S) {
1238   VisitExpr(S);
1239   VisitType(S->getAllocatedType());
1240   VisitDecl(S->getOperatorNew());
1241   VisitDecl(S->getOperatorDelete());
1242   ID.AddBoolean(S->isArray());
1243   ID.AddInteger(S->getNumPlacementArgs());
1244   ID.AddBoolean(S->isGlobalNew());
1245   ID.AddBoolean(S->isParenTypeId());
1246   ID.AddInteger(S->getInitializationStyle());
1247 }
1248 
1249 void
1250 StmtProfiler::VisitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *S) {
1251   VisitExpr(S);
1252   ID.AddBoolean(S->isArrow());
1253   VisitNestedNameSpecifier(S->getQualifier());
1254   ID.AddBoolean(S->getScopeTypeInfo() != nullptr);
1255   if (S->getScopeTypeInfo())
1256     VisitType(S->getScopeTypeInfo()->getType());
1257   ID.AddBoolean(S->getDestroyedTypeInfo() != nullptr);
1258   if (S->getDestroyedTypeInfo())
1259     VisitType(S->getDestroyedType());
1260   else
1261     ID.AddPointer(S->getDestroyedTypeIdentifier());
1262 }
1263 
1264 void StmtProfiler::VisitOverloadExpr(const OverloadExpr *S) {
1265   VisitExpr(S);
1266   VisitNestedNameSpecifier(S->getQualifier());
1267   VisitName(S->getName());
1268   ID.AddBoolean(S->hasExplicitTemplateArgs());
1269   if (S->hasExplicitTemplateArgs())
1270     VisitTemplateArguments(S->getExplicitTemplateArgs().getTemplateArgs(),
1271                            S->getExplicitTemplateArgs().NumTemplateArgs);
1272 }
1273 
1274 void
1275 StmtProfiler::VisitUnresolvedLookupExpr(const UnresolvedLookupExpr *S) {
1276   VisitOverloadExpr(S);
1277 }
1278 
1279 void StmtProfiler::VisitTypeTraitExpr(const TypeTraitExpr *S) {
1280   VisitExpr(S);
1281   ID.AddInteger(S->getTrait());
1282   ID.AddInteger(S->getNumArgs());
1283   for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
1284     VisitType(S->getArg(I)->getType());
1285 }
1286 
1287 void StmtProfiler::VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *S) {
1288   VisitExpr(S);
1289   ID.AddInteger(S->getTrait());
1290   VisitType(S->getQueriedType());
1291 }
1292 
1293 void StmtProfiler::VisitExpressionTraitExpr(const ExpressionTraitExpr *S) {
1294   VisitExpr(S);
1295   ID.AddInteger(S->getTrait());
1296   VisitExpr(S->getQueriedExpression());
1297 }
1298 
1299 void StmtProfiler::VisitDependentScopeDeclRefExpr(
1300     const DependentScopeDeclRefExpr *S) {
1301   VisitExpr(S);
1302   VisitName(S->getDeclName());
1303   VisitNestedNameSpecifier(S->getQualifier());
1304   ID.AddBoolean(S->hasExplicitTemplateArgs());
1305   if (S->hasExplicitTemplateArgs())
1306     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1307 }
1308 
1309 void StmtProfiler::VisitExprWithCleanups(const ExprWithCleanups *S) {
1310   VisitExpr(S);
1311 }
1312 
1313 void StmtProfiler::VisitCXXUnresolvedConstructExpr(
1314     const CXXUnresolvedConstructExpr *S) {
1315   VisitExpr(S);
1316   VisitType(S->getTypeAsWritten());
1317 }
1318 
1319 void StmtProfiler::VisitCXXDependentScopeMemberExpr(
1320     const CXXDependentScopeMemberExpr *S) {
1321   ID.AddBoolean(S->isImplicitAccess());
1322   if (!S->isImplicitAccess()) {
1323     VisitExpr(S);
1324     ID.AddBoolean(S->isArrow());
1325   }
1326   VisitNestedNameSpecifier(S->getQualifier());
1327   VisitName(S->getMember());
1328   ID.AddBoolean(S->hasExplicitTemplateArgs());
1329   if (S->hasExplicitTemplateArgs())
1330     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1331 }
1332 
1333 void StmtProfiler::VisitUnresolvedMemberExpr(const UnresolvedMemberExpr *S) {
1334   ID.AddBoolean(S->isImplicitAccess());
1335   if (!S->isImplicitAccess()) {
1336     VisitExpr(S);
1337     ID.AddBoolean(S->isArrow());
1338   }
1339   VisitNestedNameSpecifier(S->getQualifier());
1340   VisitName(S->getMemberName());
1341   ID.AddBoolean(S->hasExplicitTemplateArgs());
1342   if (S->hasExplicitTemplateArgs())
1343     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1344 }
1345 
1346 void StmtProfiler::VisitCXXNoexceptExpr(const CXXNoexceptExpr *S) {
1347   VisitExpr(S);
1348 }
1349 
1350 void StmtProfiler::VisitPackExpansionExpr(const PackExpansionExpr *S) {
1351   VisitExpr(S);
1352 }
1353 
1354 void StmtProfiler::VisitSizeOfPackExpr(const SizeOfPackExpr *S) {
1355   VisitExpr(S);
1356   VisitDecl(S->getPack());
1357   if (S->isPartiallySubstituted()) {
1358     auto Args = S->getPartialArguments();
1359     ID.AddInteger(Args.size());
1360     for (const auto &TA : Args)
1361       VisitTemplateArgument(TA);
1362   } else {
1363     ID.AddInteger(0);
1364   }
1365 }
1366 
1367 void StmtProfiler::VisitSubstNonTypeTemplateParmPackExpr(
1368     const SubstNonTypeTemplateParmPackExpr *S) {
1369   VisitExpr(S);
1370   VisitDecl(S->getParameterPack());
1371   VisitTemplateArgument(S->getArgumentPack());
1372 }
1373 
1374 void StmtProfiler::VisitSubstNonTypeTemplateParmExpr(
1375     const SubstNonTypeTemplateParmExpr *E) {
1376   // Profile exactly as the replacement expression.
1377   Visit(E->getReplacement());
1378 }
1379 
1380 void StmtProfiler::VisitFunctionParmPackExpr(const FunctionParmPackExpr *S) {
1381   VisitExpr(S);
1382   VisitDecl(S->getParameterPack());
1383   ID.AddInteger(S->getNumExpansions());
1384   for (FunctionParmPackExpr::iterator I = S->begin(), E = S->end(); I != E; ++I)
1385     VisitDecl(*I);
1386 }
1387 
1388 void StmtProfiler::VisitMaterializeTemporaryExpr(
1389                                            const MaterializeTemporaryExpr *S) {
1390   VisitExpr(S);
1391 }
1392 
1393 void StmtProfiler::VisitCXXFoldExpr(const CXXFoldExpr *S) {
1394   VisitExpr(S);
1395   ID.AddInteger(S->getOperator());
1396 }
1397 
1398 void StmtProfiler::VisitCoroutineBodyStmt(const CoroutineBodyStmt *S) {
1399   VisitStmt(S);
1400 }
1401 
1402 void StmtProfiler::VisitCoreturnStmt(const CoreturnStmt *S) {
1403   VisitStmt(S);
1404 }
1405 
1406 void StmtProfiler::VisitCoawaitExpr(const CoawaitExpr *S) {
1407   VisitExpr(S);
1408 }
1409 
1410 void StmtProfiler::VisitCoyieldExpr(const CoyieldExpr *S) {
1411   VisitExpr(S);
1412 }
1413 
1414 void StmtProfiler::VisitOpaqueValueExpr(const OpaqueValueExpr *E) {
1415   VisitExpr(E);
1416 }
1417 
1418 void StmtProfiler::VisitTypoExpr(const TypoExpr *E) {
1419   VisitExpr(E);
1420 }
1421 
1422 void StmtProfiler::VisitObjCStringLiteral(const ObjCStringLiteral *S) {
1423   VisitExpr(S);
1424 }
1425 
1426 void StmtProfiler::VisitObjCBoxedExpr(const ObjCBoxedExpr *E) {
1427   VisitExpr(E);
1428 }
1429 
1430 void StmtProfiler::VisitObjCArrayLiteral(const ObjCArrayLiteral *E) {
1431   VisitExpr(E);
1432 }
1433 
1434 void StmtProfiler::VisitObjCDictionaryLiteral(const ObjCDictionaryLiteral *E) {
1435   VisitExpr(E);
1436 }
1437 
1438 void StmtProfiler::VisitObjCEncodeExpr(const ObjCEncodeExpr *S) {
1439   VisitExpr(S);
1440   VisitType(S->getEncodedType());
1441 }
1442 
1443 void StmtProfiler::VisitObjCSelectorExpr(const ObjCSelectorExpr *S) {
1444   VisitExpr(S);
1445   VisitName(S->getSelector());
1446 }
1447 
1448 void StmtProfiler::VisitObjCProtocolExpr(const ObjCProtocolExpr *S) {
1449   VisitExpr(S);
1450   VisitDecl(S->getProtocol());
1451 }
1452 
1453 void StmtProfiler::VisitObjCIvarRefExpr(const ObjCIvarRefExpr *S) {
1454   VisitExpr(S);
1455   VisitDecl(S->getDecl());
1456   ID.AddBoolean(S->isArrow());
1457   ID.AddBoolean(S->isFreeIvar());
1458 }
1459 
1460 void StmtProfiler::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *S) {
1461   VisitExpr(S);
1462   if (S->isImplicitProperty()) {
1463     VisitDecl(S->getImplicitPropertyGetter());
1464     VisitDecl(S->getImplicitPropertySetter());
1465   } else {
1466     VisitDecl(S->getExplicitProperty());
1467   }
1468   if (S->isSuperReceiver()) {
1469     ID.AddBoolean(S->isSuperReceiver());
1470     VisitType(S->getSuperReceiverType());
1471   }
1472 }
1473 
1474 void StmtProfiler::VisitObjCSubscriptRefExpr(const ObjCSubscriptRefExpr *S) {
1475   VisitExpr(S);
1476   VisitDecl(S->getAtIndexMethodDecl());
1477   VisitDecl(S->setAtIndexMethodDecl());
1478 }
1479 
1480 void StmtProfiler::VisitObjCMessageExpr(const ObjCMessageExpr *S) {
1481   VisitExpr(S);
1482   VisitName(S->getSelector());
1483   VisitDecl(S->getMethodDecl());
1484 }
1485 
1486 void StmtProfiler::VisitObjCIsaExpr(const ObjCIsaExpr *S) {
1487   VisitExpr(S);
1488   ID.AddBoolean(S->isArrow());
1489 }
1490 
1491 void StmtProfiler::VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *S) {
1492   VisitExpr(S);
1493   ID.AddBoolean(S->getValue());
1494 }
1495 
1496 void StmtProfiler::VisitObjCIndirectCopyRestoreExpr(
1497     const ObjCIndirectCopyRestoreExpr *S) {
1498   VisitExpr(S);
1499   ID.AddBoolean(S->shouldCopy());
1500 }
1501 
1502 void StmtProfiler::VisitObjCBridgedCastExpr(const ObjCBridgedCastExpr *S) {
1503   VisitExplicitCastExpr(S);
1504   ID.AddBoolean(S->getBridgeKind());
1505 }
1506 
1507 void StmtProfiler::VisitDecl(const Decl *D) {
1508   ID.AddInteger(D? D->getKind() : 0);
1509 
1510   if (Canonical && D) {
1511     if (const NonTypeTemplateParmDecl *NTTP =
1512           dyn_cast<NonTypeTemplateParmDecl>(D)) {
1513       ID.AddInteger(NTTP->getDepth());
1514       ID.AddInteger(NTTP->getIndex());
1515       ID.AddBoolean(NTTP->isParameterPack());
1516       VisitType(NTTP->getType());
1517       return;
1518     }
1519 
1520     if (const ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D)) {
1521       // The Itanium C++ ABI uses the type, scope depth, and scope
1522       // index of a parameter when mangling expressions that involve
1523       // function parameters, so we will use the parameter's type for
1524       // establishing function parameter identity. That way, our
1525       // definition of "equivalent" (per C++ [temp.over.link]) is at
1526       // least as strong as the definition of "equivalent" used for
1527       // name mangling.
1528       VisitType(Parm->getType());
1529       ID.AddInteger(Parm->getFunctionScopeDepth());
1530       ID.AddInteger(Parm->getFunctionScopeIndex());
1531       return;
1532     }
1533 
1534     if (const TemplateTypeParmDecl *TTP =
1535           dyn_cast<TemplateTypeParmDecl>(D)) {
1536       ID.AddInteger(TTP->getDepth());
1537       ID.AddInteger(TTP->getIndex());
1538       ID.AddBoolean(TTP->isParameterPack());
1539       return;
1540     }
1541 
1542     if (const TemplateTemplateParmDecl *TTP =
1543           dyn_cast<TemplateTemplateParmDecl>(D)) {
1544       ID.AddInteger(TTP->getDepth());
1545       ID.AddInteger(TTP->getIndex());
1546       ID.AddBoolean(TTP->isParameterPack());
1547       return;
1548     }
1549   }
1550 
1551   ID.AddPointer(D? D->getCanonicalDecl() : nullptr);
1552 }
1553 
1554 void StmtProfiler::VisitType(QualType T) {
1555   if (Canonical)
1556     T = Context.getCanonicalType(T);
1557 
1558   ID.AddPointer(T.getAsOpaquePtr());
1559 }
1560 
1561 void StmtProfiler::VisitName(DeclarationName Name) {
1562   ID.AddPointer(Name.getAsOpaquePtr());
1563 }
1564 
1565 void StmtProfiler::VisitNestedNameSpecifier(NestedNameSpecifier *NNS) {
1566   if (Canonical)
1567     NNS = Context.getCanonicalNestedNameSpecifier(NNS);
1568   ID.AddPointer(NNS);
1569 }
1570 
1571 void StmtProfiler::VisitTemplateName(TemplateName Name) {
1572   if (Canonical)
1573     Name = Context.getCanonicalTemplateName(Name);
1574 
1575   Name.Profile(ID);
1576 }
1577 
1578 void StmtProfiler::VisitTemplateArguments(const TemplateArgumentLoc *Args,
1579                                           unsigned NumArgs) {
1580   ID.AddInteger(NumArgs);
1581   for (unsigned I = 0; I != NumArgs; ++I)
1582     VisitTemplateArgument(Args[I].getArgument());
1583 }
1584 
1585 void StmtProfiler::VisitTemplateArgument(const TemplateArgument &Arg) {
1586   // Mostly repetitive with TemplateArgument::Profile!
1587   ID.AddInteger(Arg.getKind());
1588   switch (Arg.getKind()) {
1589   case TemplateArgument::Null:
1590     break;
1591 
1592   case TemplateArgument::Type:
1593     VisitType(Arg.getAsType());
1594     break;
1595 
1596   case TemplateArgument::Template:
1597   case TemplateArgument::TemplateExpansion:
1598     VisitTemplateName(Arg.getAsTemplateOrTemplatePattern());
1599     break;
1600 
1601   case TemplateArgument::Declaration:
1602     VisitDecl(Arg.getAsDecl());
1603     break;
1604 
1605   case TemplateArgument::NullPtr:
1606     VisitType(Arg.getNullPtrType());
1607     break;
1608 
1609   case TemplateArgument::Integral:
1610     Arg.getAsIntegral().Profile(ID);
1611     VisitType(Arg.getIntegralType());
1612     break;
1613 
1614   case TemplateArgument::Expression:
1615     Visit(Arg.getAsExpr());
1616     break;
1617 
1618   case TemplateArgument::Pack:
1619     for (const auto &P : Arg.pack_elements())
1620       VisitTemplateArgument(P);
1621     break;
1622   }
1623 }
1624 
1625 void Stmt::Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
1626                    bool Canonical) const {
1627   StmtProfiler Profiler(ID, Context, Canonical);
1628   Profiler.Visit(this);
1629 }
1630