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