1 //===---- StmtProfile.cpp - Profile implementation for Stmt ASTs ----------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the Stmt::Profile method, which builds a unique bit
11 // representation that identifies a statement/expression.
12 //
13 //===----------------------------------------------------------------------===//
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/DeclCXX.h"
16 #include "clang/AST/DeclObjC.h"
17 #include "clang/AST/DeclTemplate.h"
18 #include "clang/AST/Expr.h"
19 #include "clang/AST/ExprCXX.h"
20 #include "clang/AST/ExprObjC.h"
21 #include "clang/AST/StmtVisitor.h"
22 #include "llvm/ADT/FoldingSet.h"
23 using namespace clang;
24 
25 namespace {
26   class StmtProfiler : public ConstStmtVisitor<StmtProfiler> {
27     llvm::FoldingSetNodeID &ID;
28     const ASTContext &Context;
29     bool Canonical;
30 
31   public:
32     StmtProfiler(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
33                  bool Canonical)
34       : ID(ID), Context(Context), Canonical(Canonical) { }
35 
36     void VisitStmt(const Stmt *S);
37 
38 #define STMT(Node, Base) void Visit##Node(const Node *S);
39 #include "clang/AST/StmtNodes.inc"
40 
41     /// \brief Visit a declaration that is referenced within an expression
42     /// or statement.
43     void VisitDecl(const Decl *D);
44 
45     /// \brief Visit a type that is referenced within an expression or
46     /// statement.
47     void VisitType(QualType T);
48 
49     /// \brief Visit a name that occurs within an expression or statement.
50     void VisitName(DeclarationName Name);
51 
52     /// \brief Visit a nested-name-specifier that occurs within an expression
53     /// or statement.
54     void VisitNestedNameSpecifier(NestedNameSpecifier *NNS);
55 
56     /// \brief Visit a template name that occurs within an expression or
57     /// statement.
58     void VisitTemplateName(TemplateName Name);
59 
60     /// \brief Visit template arguments that occur within an expression or
61     /// statement.
62     void VisitTemplateArguments(const TemplateArgumentLoc *Args,
63                                 unsigned NumArgs);
64 
65     /// \brief Visit a single template argument.
66     void VisitTemplateArgument(const TemplateArgument &Arg);
67   };
68 } // namespace
69 
70 void StmtProfiler::VisitStmt(const Stmt *S) {
71   ID.AddInteger(S->getStmtClass());
72   for (Stmt::const_child_range C = S->children(); C; ++C) {
73     if (*C)
74       Visit(*C);
75     else
76       ID.AddInteger(0);
77   }
78 }
79 
80 void StmtProfiler::VisitDeclStmt(const DeclStmt *S) {
81   VisitStmt(S);
82   for (const auto *D : S->decls())
83     VisitDecl(D);
84 }
85 
86 void StmtProfiler::VisitNullStmt(const NullStmt *S) {
87   VisitStmt(S);
88 }
89 
90 void StmtProfiler::VisitCompoundStmt(const CompoundStmt *S) {
91   VisitStmt(S);
92 }
93 
94 void StmtProfiler::VisitSwitchCase(const SwitchCase *S) {
95   VisitStmt(S);
96 }
97 
98 void StmtProfiler::VisitCaseStmt(const CaseStmt *S) {
99   VisitStmt(S);
100 }
101 
102 void StmtProfiler::VisitDefaultStmt(const DefaultStmt *S) {
103   VisitStmt(S);
104 }
105 
106 void StmtProfiler::VisitLabelStmt(const LabelStmt *S) {
107   VisitStmt(S);
108   VisitDecl(S->getDecl());
109 }
110 
111 void StmtProfiler::VisitAttributedStmt(const AttributedStmt *S) {
112   VisitStmt(S);
113   // TODO: maybe visit attributes?
114 }
115 
116 void StmtProfiler::VisitIfStmt(const IfStmt *S) {
117   VisitStmt(S);
118   VisitDecl(S->getConditionVariable());
119 }
120 
121 void StmtProfiler::VisitSwitchStmt(const SwitchStmt *S) {
122   VisitStmt(S);
123   VisitDecl(S->getConditionVariable());
124 }
125 
126 void StmtProfiler::VisitWhileStmt(const WhileStmt *S) {
127   VisitStmt(S);
128   VisitDecl(S->getConditionVariable());
129 }
130 
131 void StmtProfiler::VisitDoStmt(const DoStmt *S) {
132   VisitStmt(S);
133 }
134 
135 void StmtProfiler::VisitForStmt(const ForStmt *S) {
136   VisitStmt(S);
137 }
138 
139 void StmtProfiler::VisitGotoStmt(const GotoStmt *S) {
140   VisitStmt(S);
141   VisitDecl(S->getLabel());
142 }
143 
144 void StmtProfiler::VisitIndirectGotoStmt(const IndirectGotoStmt *S) {
145   VisitStmt(S);
146 }
147 
148 void StmtProfiler::VisitContinueStmt(const ContinueStmt *S) {
149   VisitStmt(S);
150 }
151 
152 void StmtProfiler::VisitBreakStmt(const BreakStmt *S) {
153   VisitStmt(S);
154 }
155 
156 void StmtProfiler::VisitReturnStmt(const ReturnStmt *S) {
157   VisitStmt(S);
158 }
159 
160 void StmtProfiler::VisitGCCAsmStmt(const GCCAsmStmt *S) {
161   VisitStmt(S);
162   ID.AddBoolean(S->isVolatile());
163   ID.AddBoolean(S->isSimple());
164   VisitStringLiteral(S->getAsmString());
165   ID.AddInteger(S->getNumOutputs());
166   for (unsigned I = 0, N = S->getNumOutputs(); I != N; ++I) {
167     ID.AddString(S->getOutputName(I));
168     VisitStringLiteral(S->getOutputConstraintLiteral(I));
169   }
170   ID.AddInteger(S->getNumInputs());
171   for (unsigned I = 0, N = S->getNumInputs(); I != N; ++I) {
172     ID.AddString(S->getInputName(I));
173     VisitStringLiteral(S->getInputConstraintLiteral(I));
174   }
175   ID.AddInteger(S->getNumClobbers());
176   for (unsigned I = 0, N = S->getNumClobbers(); I != N; ++I)
177     VisitStringLiteral(S->getClobberStringLiteral(I));
178 }
179 
180 void StmtProfiler::VisitMSAsmStmt(const MSAsmStmt *S) {
181   // FIXME: Implement MS style inline asm statement profiler.
182   VisitStmt(S);
183 }
184 
185 void StmtProfiler::VisitCXXCatchStmt(const CXXCatchStmt *S) {
186   VisitStmt(S);
187   VisitType(S->getCaughtType());
188 }
189 
190 void StmtProfiler::VisitCXXTryStmt(const CXXTryStmt *S) {
191   VisitStmt(S);
192 }
193 
194 void StmtProfiler::VisitCXXForRangeStmt(const CXXForRangeStmt *S) {
195   VisitStmt(S);
196 }
197 
198 void StmtProfiler::VisitMSDependentExistsStmt(const MSDependentExistsStmt *S) {
199   VisitStmt(S);
200   ID.AddBoolean(S->isIfExists());
201   VisitNestedNameSpecifier(S->getQualifierLoc().getNestedNameSpecifier());
202   VisitName(S->getNameInfo().getName());
203 }
204 
205 void StmtProfiler::VisitSEHTryStmt(const SEHTryStmt *S) {
206   VisitStmt(S);
207 }
208 
209 void StmtProfiler::VisitSEHFinallyStmt(const SEHFinallyStmt *S) {
210   VisitStmt(S);
211 }
212 
213 void StmtProfiler::VisitSEHExceptStmt(const SEHExceptStmt *S) {
214   VisitStmt(S);
215 }
216 
217 void StmtProfiler::VisitSEHLeaveStmt(const SEHLeaveStmt *S) {
218   VisitStmt(S);
219 }
220 
221 void StmtProfiler::VisitCapturedStmt(const CapturedStmt *S) {
222   VisitStmt(S);
223 }
224 
225 void StmtProfiler::VisitObjCForCollectionStmt(const ObjCForCollectionStmt *S) {
226   VisitStmt(S);
227 }
228 
229 void StmtProfiler::VisitObjCAtCatchStmt(const ObjCAtCatchStmt *S) {
230   VisitStmt(S);
231   ID.AddBoolean(S->hasEllipsis());
232   if (S->getCatchParamDecl())
233     VisitType(S->getCatchParamDecl()->getType());
234 }
235 
236 void StmtProfiler::VisitObjCAtFinallyStmt(const ObjCAtFinallyStmt *S) {
237   VisitStmt(S);
238 }
239 
240 void StmtProfiler::VisitObjCAtTryStmt(const ObjCAtTryStmt *S) {
241   VisitStmt(S);
242 }
243 
244 void
245 StmtProfiler::VisitObjCAtSynchronizedStmt(const ObjCAtSynchronizedStmt *S) {
246   VisitStmt(S);
247 }
248 
249 void StmtProfiler::VisitObjCAtThrowStmt(const ObjCAtThrowStmt *S) {
250   VisitStmt(S);
251 }
252 
253 void
254 StmtProfiler::VisitObjCAutoreleasePoolStmt(const ObjCAutoreleasePoolStmt *S) {
255   VisitStmt(S);
256 }
257 
258 namespace {
259 class OMPClauseProfiler : public ConstOMPClauseVisitor<OMPClauseProfiler> {
260   StmtProfiler *Profiler;
261   /// \brief Process clauses with list of variables.
262   template <typename T>
263   void VisitOMPClauseList(T *Node);
264 public:
265   OMPClauseProfiler(StmtProfiler *P) : Profiler(P) { }
266 #define OPENMP_CLAUSE(Name, Class)                                             \
267   void Visit##Class(const Class *C);
268 #include "clang/Basic/OpenMPKinds.def"
269 };
270 
271 void OMPClauseProfiler::VisitOMPIfClause(const OMPIfClause *C) {
272   if (C->getCondition())
273     Profiler->VisitStmt(C->getCondition());
274 }
275 
276 void OMPClauseProfiler::VisitOMPFinalClause(const OMPFinalClause *C) {
277   if (C->getCondition())
278     Profiler->VisitStmt(C->getCondition());
279 }
280 
281 void OMPClauseProfiler::VisitOMPNumThreadsClause(const OMPNumThreadsClause *C) {
282   if (C->getNumThreads())
283     Profiler->VisitStmt(C->getNumThreads());
284 }
285 
286 void OMPClauseProfiler::VisitOMPSafelenClause(const OMPSafelenClause *C) {
287   if (C->getSafelen())
288     Profiler->VisitStmt(C->getSafelen());
289 }
290 
291 void OMPClauseProfiler::VisitOMPCollapseClause(const OMPCollapseClause *C) {
292   if (C->getNumForLoops())
293     Profiler->VisitStmt(C->getNumForLoops());
294 }
295 
296 void OMPClauseProfiler::VisitOMPDefaultClause(const OMPDefaultClause *C) { }
297 
298 void OMPClauseProfiler::VisitOMPProcBindClause(const OMPProcBindClause *C) { }
299 
300 void OMPClauseProfiler::VisitOMPScheduleClause(const OMPScheduleClause *C) {
301   if (C->getChunkSize()) {
302     Profiler->VisitStmt(C->getChunkSize());
303     if (C->getHelperChunkSize()) {
304       Profiler->VisitStmt(C->getChunkSize());
305     }
306   }
307 }
308 
309 void OMPClauseProfiler::VisitOMPOrderedClause(const OMPOrderedClause *) {}
310 
311 void OMPClauseProfiler::VisitOMPNowaitClause(const OMPNowaitClause *) {}
312 
313 void OMPClauseProfiler::VisitOMPUntiedClause(const OMPUntiedClause *) {}
314 
315 void OMPClauseProfiler::VisitOMPMergeableClause(const OMPMergeableClause *) {}
316 
317 void OMPClauseProfiler::VisitOMPReadClause(const OMPReadClause *) {}
318 
319 void OMPClauseProfiler::VisitOMPWriteClause(const OMPWriteClause *) {}
320 
321 void OMPClauseProfiler::VisitOMPUpdateClause(const OMPUpdateClause *) {}
322 
323 void OMPClauseProfiler::VisitOMPCaptureClause(const OMPCaptureClause *) {}
324 
325 void OMPClauseProfiler::VisitOMPSeqCstClause(const OMPSeqCstClause *) {}
326 
327 template<typename T>
328 void OMPClauseProfiler::VisitOMPClauseList(T *Node) {
329   for (auto *E : Node->varlists()) {
330     Profiler->VisitStmt(E);
331   }
332 }
333 
334 void OMPClauseProfiler::VisitOMPPrivateClause(const OMPPrivateClause *C) {
335   VisitOMPClauseList(C);
336   for (auto *E : C->private_copies()) {
337     Profiler->VisitStmt(E);
338   }
339 }
340 void
341 OMPClauseProfiler::VisitOMPFirstprivateClause(const OMPFirstprivateClause *C) {
342   VisitOMPClauseList(C);
343   for (auto *E : C->private_copies()) {
344     Profiler->VisitStmt(E);
345   }
346   for (auto *E : C->inits()) {
347     Profiler->VisitStmt(E);
348   }
349 }
350 void
351 OMPClauseProfiler::VisitOMPLastprivateClause(const OMPLastprivateClause *C) {
352   VisitOMPClauseList(C);
353   for (auto *E : C->source_exprs()) {
354     Profiler->VisitStmt(E);
355   }
356   for (auto *E : C->destination_exprs()) {
357     Profiler->VisitStmt(E);
358   }
359   for (auto *E : C->assignment_ops()) {
360     Profiler->VisitStmt(E);
361   }
362 }
363 void OMPClauseProfiler::VisitOMPSharedClause(const OMPSharedClause *C) {
364   VisitOMPClauseList(C);
365 }
366 void OMPClauseProfiler::VisitOMPReductionClause(
367                                          const OMPReductionClause *C) {
368   Profiler->VisitNestedNameSpecifier(
369       C->getQualifierLoc().getNestedNameSpecifier());
370   Profiler->VisitName(C->getNameInfo().getName());
371   VisitOMPClauseList(C);
372   for (auto *E : C->lhs_exprs()) {
373     Profiler->VisitStmt(E);
374   }
375   for (auto *E : C->rhs_exprs()) {
376     Profiler->VisitStmt(E);
377   }
378   for (auto *E : C->reduction_ops()) {
379     Profiler->VisitStmt(E);
380   }
381 }
382 void OMPClauseProfiler::VisitOMPLinearClause(const OMPLinearClause *C) {
383   VisitOMPClauseList(C);
384   for (auto *E : C->inits()) {
385     Profiler->VisitStmt(E);
386   }
387   for (auto *E : C->updates()) {
388     Profiler->VisitStmt(E);
389   }
390   for (auto *E : C->finals()) {
391     Profiler->VisitStmt(E);
392   }
393   Profiler->VisitStmt(C->getStep());
394   Profiler->VisitStmt(C->getCalcStep());
395 }
396 void OMPClauseProfiler::VisitOMPAlignedClause(const OMPAlignedClause *C) {
397   VisitOMPClauseList(C);
398   Profiler->VisitStmt(C->getAlignment());
399 }
400 void OMPClauseProfiler::VisitOMPCopyinClause(const OMPCopyinClause *C) {
401   VisitOMPClauseList(C);
402   for (auto *E : C->source_exprs()) {
403     Profiler->VisitStmt(E);
404   }
405   for (auto *E : C->destination_exprs()) {
406     Profiler->VisitStmt(E);
407   }
408   for (auto *E : C->assignment_ops()) {
409     Profiler->VisitStmt(E);
410   }
411 }
412 void
413 OMPClauseProfiler::VisitOMPCopyprivateClause(const OMPCopyprivateClause *C) {
414   VisitOMPClauseList(C);
415   for (auto *E : C->source_exprs()) {
416     Profiler->VisitStmt(E);
417   }
418   for (auto *E : C->destination_exprs()) {
419     Profiler->VisitStmt(E);
420   }
421   for (auto *E : C->assignment_ops()) {
422     Profiler->VisitStmt(E);
423   }
424 }
425 void OMPClauseProfiler::VisitOMPFlushClause(const OMPFlushClause *C) {
426   VisitOMPClauseList(C);
427 }
428 } // namespace
429 
430 void
431 StmtProfiler::VisitOMPExecutableDirective(const OMPExecutableDirective *S) {
432   VisitStmt(S);
433   OMPClauseProfiler P(this);
434   ArrayRef<OMPClause *> Clauses = S->clauses();
435   for (ArrayRef<OMPClause *>::iterator I = Clauses.begin(), E = Clauses.end();
436        I != E; ++I)
437     if (*I)
438       P.Visit(*I);
439 }
440 
441 void StmtProfiler::VisitOMPLoopDirective(const OMPLoopDirective *S) {
442   VisitOMPExecutableDirective(S);
443 }
444 
445 void StmtProfiler::VisitOMPParallelDirective(const OMPParallelDirective *S) {
446   VisitOMPExecutableDirective(S);
447 }
448 
449 void StmtProfiler::VisitOMPSimdDirective(const OMPSimdDirective *S) {
450   VisitOMPLoopDirective(S);
451 }
452 
453 void StmtProfiler::VisitOMPForDirective(const OMPForDirective *S) {
454   VisitOMPLoopDirective(S);
455 }
456 
457 void StmtProfiler::VisitOMPForSimdDirective(const OMPForSimdDirective *S) {
458   VisitOMPLoopDirective(S);
459 }
460 
461 void StmtProfiler::VisitOMPSectionsDirective(const OMPSectionsDirective *S) {
462   VisitOMPExecutableDirective(S);
463 }
464 
465 void StmtProfiler::VisitOMPSectionDirective(const OMPSectionDirective *S) {
466   VisitOMPExecutableDirective(S);
467 }
468 
469 void StmtProfiler::VisitOMPSingleDirective(const OMPSingleDirective *S) {
470   VisitOMPExecutableDirective(S);
471 }
472 
473 void StmtProfiler::VisitOMPMasterDirective(const OMPMasterDirective *S) {
474   VisitOMPExecutableDirective(S);
475 }
476 
477 void StmtProfiler::VisitOMPCriticalDirective(const OMPCriticalDirective *S) {
478   VisitOMPExecutableDirective(S);
479   VisitName(S->getDirectiveName().getName());
480 }
481 
482 void
483 StmtProfiler::VisitOMPParallelForDirective(const OMPParallelForDirective *S) {
484   VisitOMPLoopDirective(S);
485 }
486 
487 void StmtProfiler::VisitOMPParallelForSimdDirective(
488     const OMPParallelForSimdDirective *S) {
489   VisitOMPLoopDirective(S);
490 }
491 
492 void StmtProfiler::VisitOMPParallelSectionsDirective(
493     const OMPParallelSectionsDirective *S) {
494   VisitOMPExecutableDirective(S);
495 }
496 
497 void StmtProfiler::VisitOMPTaskDirective(const OMPTaskDirective *S) {
498   VisitOMPExecutableDirective(S);
499 }
500 
501 void StmtProfiler::VisitOMPTaskyieldDirective(const OMPTaskyieldDirective *S) {
502   VisitOMPExecutableDirective(S);
503 }
504 
505 void StmtProfiler::VisitOMPBarrierDirective(const OMPBarrierDirective *S) {
506   VisitOMPExecutableDirective(S);
507 }
508 
509 void StmtProfiler::VisitOMPTaskwaitDirective(const OMPTaskwaitDirective *S) {
510   VisitOMPExecutableDirective(S);
511 }
512 
513 void StmtProfiler::VisitOMPTaskgroupDirective(const OMPTaskgroupDirective *S) {
514   VisitOMPExecutableDirective(S);
515 }
516 
517 void StmtProfiler::VisitOMPFlushDirective(const OMPFlushDirective *S) {
518   VisitOMPExecutableDirective(S);
519 }
520 
521 void StmtProfiler::VisitOMPOrderedDirective(const OMPOrderedDirective *S) {
522   VisitOMPExecutableDirective(S);
523 }
524 
525 void StmtProfiler::VisitOMPAtomicDirective(const OMPAtomicDirective *S) {
526   VisitOMPExecutableDirective(S);
527 }
528 
529 void StmtProfiler::VisitOMPTargetDirective(const OMPTargetDirective *S) {
530   VisitOMPExecutableDirective(S);
531 }
532 
533 void StmtProfiler::VisitOMPTeamsDirective(const OMPTeamsDirective *S) {
534   VisitOMPExecutableDirective(S);
535 }
536 
537 void StmtProfiler::VisitExpr(const Expr *S) {
538   VisitStmt(S);
539 }
540 
541 void StmtProfiler::VisitDeclRefExpr(const DeclRefExpr *S) {
542   VisitExpr(S);
543   if (!Canonical)
544     VisitNestedNameSpecifier(S->getQualifier());
545   VisitDecl(S->getDecl());
546   if (!Canonical)
547     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
548 }
549 
550 void StmtProfiler::VisitPredefinedExpr(const PredefinedExpr *S) {
551   VisitExpr(S);
552   ID.AddInteger(S->getIdentType());
553 }
554 
555 void StmtProfiler::VisitIntegerLiteral(const IntegerLiteral *S) {
556   VisitExpr(S);
557   S->getValue().Profile(ID);
558   ID.AddInteger(S->getType()->castAs<BuiltinType>()->getKind());
559 }
560 
561 void StmtProfiler::VisitCharacterLiteral(const CharacterLiteral *S) {
562   VisitExpr(S);
563   ID.AddInteger(S->getKind());
564   ID.AddInteger(S->getValue());
565 }
566 
567 void StmtProfiler::VisitFloatingLiteral(const FloatingLiteral *S) {
568   VisitExpr(S);
569   S->getValue().Profile(ID);
570   ID.AddBoolean(S->isExact());
571   ID.AddInteger(S->getType()->castAs<BuiltinType>()->getKind());
572 }
573 
574 void StmtProfiler::VisitImaginaryLiteral(const ImaginaryLiteral *S) {
575   VisitExpr(S);
576 }
577 
578 void StmtProfiler::VisitStringLiteral(const StringLiteral *S) {
579   VisitExpr(S);
580   ID.AddString(S->getBytes());
581   ID.AddInteger(S->getKind());
582 }
583 
584 void StmtProfiler::VisitParenExpr(const ParenExpr *S) {
585   VisitExpr(S);
586 }
587 
588 void StmtProfiler::VisitParenListExpr(const ParenListExpr *S) {
589   VisitExpr(S);
590 }
591 
592 void StmtProfiler::VisitUnaryOperator(const UnaryOperator *S) {
593   VisitExpr(S);
594   ID.AddInteger(S->getOpcode());
595 }
596 
597 void StmtProfiler::VisitOffsetOfExpr(const OffsetOfExpr *S) {
598   VisitType(S->getTypeSourceInfo()->getType());
599   unsigned n = S->getNumComponents();
600   for (unsigned i = 0; i < n; ++i) {
601     const OffsetOfExpr::OffsetOfNode& ON = S->getComponent(i);
602     ID.AddInteger(ON.getKind());
603     switch (ON.getKind()) {
604     case OffsetOfExpr::OffsetOfNode::Array:
605       // Expressions handled below.
606       break;
607 
608     case OffsetOfExpr::OffsetOfNode::Field:
609       VisitDecl(ON.getField());
610       break;
611 
612     case OffsetOfExpr::OffsetOfNode::Identifier:
613       ID.AddPointer(ON.getFieldName());
614       break;
615 
616     case OffsetOfExpr::OffsetOfNode::Base:
617       // These nodes are implicit, and therefore don't need profiling.
618       break;
619     }
620   }
621 
622   VisitExpr(S);
623 }
624 
625 void
626 StmtProfiler::VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *S) {
627   VisitExpr(S);
628   ID.AddInteger(S->getKind());
629   if (S->isArgumentType())
630     VisitType(S->getArgumentType());
631 }
632 
633 void StmtProfiler::VisitArraySubscriptExpr(const ArraySubscriptExpr *S) {
634   VisitExpr(S);
635 }
636 
637 void StmtProfiler::VisitCallExpr(const CallExpr *S) {
638   VisitExpr(S);
639 }
640 
641 void StmtProfiler::VisitMemberExpr(const MemberExpr *S) {
642   VisitExpr(S);
643   VisitDecl(S->getMemberDecl());
644   if (!Canonical)
645     VisitNestedNameSpecifier(S->getQualifier());
646   ID.AddBoolean(S->isArrow());
647 }
648 
649 void StmtProfiler::VisitCompoundLiteralExpr(const CompoundLiteralExpr *S) {
650   VisitExpr(S);
651   ID.AddBoolean(S->isFileScope());
652 }
653 
654 void StmtProfiler::VisitCastExpr(const CastExpr *S) {
655   VisitExpr(S);
656 }
657 
658 void StmtProfiler::VisitImplicitCastExpr(const ImplicitCastExpr *S) {
659   VisitCastExpr(S);
660   ID.AddInteger(S->getValueKind());
661 }
662 
663 void StmtProfiler::VisitExplicitCastExpr(const ExplicitCastExpr *S) {
664   VisitCastExpr(S);
665   VisitType(S->getTypeAsWritten());
666 }
667 
668 void StmtProfiler::VisitCStyleCastExpr(const CStyleCastExpr *S) {
669   VisitExplicitCastExpr(S);
670 }
671 
672 void StmtProfiler::VisitBinaryOperator(const BinaryOperator *S) {
673   VisitExpr(S);
674   ID.AddInteger(S->getOpcode());
675 }
676 
677 void
678 StmtProfiler::VisitCompoundAssignOperator(const CompoundAssignOperator *S) {
679   VisitBinaryOperator(S);
680 }
681 
682 void StmtProfiler::VisitConditionalOperator(const ConditionalOperator *S) {
683   VisitExpr(S);
684 }
685 
686 void StmtProfiler::VisitBinaryConditionalOperator(
687     const BinaryConditionalOperator *S) {
688   VisitExpr(S);
689 }
690 
691 void StmtProfiler::VisitAddrLabelExpr(const AddrLabelExpr *S) {
692   VisitExpr(S);
693   VisitDecl(S->getLabel());
694 }
695 
696 void StmtProfiler::VisitStmtExpr(const StmtExpr *S) {
697   VisitExpr(S);
698 }
699 
700 void StmtProfiler::VisitShuffleVectorExpr(const ShuffleVectorExpr *S) {
701   VisitExpr(S);
702 }
703 
704 void StmtProfiler::VisitConvertVectorExpr(const ConvertVectorExpr *S) {
705   VisitExpr(S);
706 }
707 
708 void StmtProfiler::VisitChooseExpr(const ChooseExpr *S) {
709   VisitExpr(S);
710 }
711 
712 void StmtProfiler::VisitGNUNullExpr(const GNUNullExpr *S) {
713   VisitExpr(S);
714 }
715 
716 void StmtProfiler::VisitVAArgExpr(const VAArgExpr *S) {
717   VisitExpr(S);
718 }
719 
720 void StmtProfiler::VisitInitListExpr(const InitListExpr *S) {
721   if (S->getSyntacticForm()) {
722     VisitInitListExpr(S->getSyntacticForm());
723     return;
724   }
725 
726   VisitExpr(S);
727 }
728 
729 void StmtProfiler::VisitDesignatedInitExpr(const DesignatedInitExpr *S) {
730   VisitExpr(S);
731   ID.AddBoolean(S->usesGNUSyntax());
732   for (DesignatedInitExpr::const_designators_iterator D =
733          S->designators_begin(), DEnd = S->designators_end();
734        D != DEnd; ++D) {
735     if (D->isFieldDesignator()) {
736       ID.AddInteger(0);
737       VisitName(D->getFieldName());
738       continue;
739     }
740 
741     if (D->isArrayDesignator()) {
742       ID.AddInteger(1);
743     } else {
744       assert(D->isArrayRangeDesignator());
745       ID.AddInteger(2);
746     }
747     ID.AddInteger(D->getFirstExprIndex());
748   }
749 }
750 
751 // Seems that if VisitInitListExpr() only works on the syntactic form of an
752 // InitListExpr, then a DesignatedInitUpdateExpr is not encountered.
753 void StmtProfiler::VisitDesignatedInitUpdateExpr(
754     const DesignatedInitUpdateExpr *S) {
755   llvm_unreachable("Unexpected DesignatedInitUpdateExpr in syntactic form of "
756                    "initializer");
757 }
758 
759 void StmtProfiler::VisitNoInitExpr(const NoInitExpr *S) {
760   llvm_unreachable("Unexpected NoInitExpr in syntactic form of initializer");
761 }
762 
763 void StmtProfiler::VisitImplicitValueInitExpr(const ImplicitValueInitExpr *S) {
764   VisitExpr(S);
765 }
766 
767 void StmtProfiler::VisitExtVectorElementExpr(const ExtVectorElementExpr *S) {
768   VisitExpr(S);
769   VisitName(&S->getAccessor());
770 }
771 
772 void StmtProfiler::VisitBlockExpr(const BlockExpr *S) {
773   VisitExpr(S);
774   VisitDecl(S->getBlockDecl());
775 }
776 
777 void StmtProfiler::VisitGenericSelectionExpr(const GenericSelectionExpr *S) {
778   VisitExpr(S);
779   for (unsigned i = 0; i != S->getNumAssocs(); ++i) {
780     QualType T = S->getAssocType(i);
781     if (T.isNull())
782       ID.AddPointer(nullptr);
783     else
784       VisitType(T);
785     VisitExpr(S->getAssocExpr(i));
786   }
787 }
788 
789 void StmtProfiler::VisitPseudoObjectExpr(const PseudoObjectExpr *S) {
790   VisitExpr(S);
791   for (PseudoObjectExpr::const_semantics_iterator
792          i = S->semantics_begin(), e = S->semantics_end(); i != e; ++i)
793     // Normally, we would not profile the source expressions of OVEs.
794     if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(*i))
795       Visit(OVE->getSourceExpr());
796 }
797 
798 void StmtProfiler::VisitAtomicExpr(const AtomicExpr *S) {
799   VisitExpr(S);
800   ID.AddInteger(S->getOp());
801 }
802 
803 static Stmt::StmtClass DecodeOperatorCall(const CXXOperatorCallExpr *S,
804                                           UnaryOperatorKind &UnaryOp,
805                                           BinaryOperatorKind &BinaryOp) {
806   switch (S->getOperator()) {
807   case OO_None:
808   case OO_New:
809   case OO_Delete:
810   case OO_Array_New:
811   case OO_Array_Delete:
812   case OO_Arrow:
813   case OO_Call:
814   case OO_Conditional:
815   case NUM_OVERLOADED_OPERATORS:
816     llvm_unreachable("Invalid operator call kind");
817 
818   case OO_Plus:
819     if (S->getNumArgs() == 1) {
820       UnaryOp = UO_Plus;
821       return Stmt::UnaryOperatorClass;
822     }
823 
824     BinaryOp = BO_Add;
825     return Stmt::BinaryOperatorClass;
826 
827   case OO_Minus:
828     if (S->getNumArgs() == 1) {
829       UnaryOp = UO_Minus;
830       return Stmt::UnaryOperatorClass;
831     }
832 
833     BinaryOp = BO_Sub;
834     return Stmt::BinaryOperatorClass;
835 
836   case OO_Star:
837     if (S->getNumArgs() == 1) {
838       UnaryOp = UO_Deref;
839       return Stmt::UnaryOperatorClass;
840     }
841 
842     BinaryOp = BO_Mul;
843     return Stmt::BinaryOperatorClass;
844 
845   case OO_Slash:
846     BinaryOp = BO_Div;
847     return Stmt::BinaryOperatorClass;
848 
849   case OO_Percent:
850     BinaryOp = BO_Rem;
851     return Stmt::BinaryOperatorClass;
852 
853   case OO_Caret:
854     BinaryOp = BO_Xor;
855     return Stmt::BinaryOperatorClass;
856 
857   case OO_Amp:
858     if (S->getNumArgs() == 1) {
859       UnaryOp = UO_AddrOf;
860       return Stmt::UnaryOperatorClass;
861     }
862 
863     BinaryOp = BO_And;
864     return Stmt::BinaryOperatorClass;
865 
866   case OO_Pipe:
867     BinaryOp = BO_Or;
868     return Stmt::BinaryOperatorClass;
869 
870   case OO_Tilde:
871     UnaryOp = UO_Not;
872     return Stmt::UnaryOperatorClass;
873 
874   case OO_Exclaim:
875     UnaryOp = UO_LNot;
876     return Stmt::UnaryOperatorClass;
877 
878   case OO_Equal:
879     BinaryOp = BO_Assign;
880     return Stmt::BinaryOperatorClass;
881 
882   case OO_Less:
883     BinaryOp = BO_LT;
884     return Stmt::BinaryOperatorClass;
885 
886   case OO_Greater:
887     BinaryOp = BO_GT;
888     return Stmt::BinaryOperatorClass;
889 
890   case OO_PlusEqual:
891     BinaryOp = BO_AddAssign;
892     return Stmt::CompoundAssignOperatorClass;
893 
894   case OO_MinusEqual:
895     BinaryOp = BO_SubAssign;
896     return Stmt::CompoundAssignOperatorClass;
897 
898   case OO_StarEqual:
899     BinaryOp = BO_MulAssign;
900     return Stmt::CompoundAssignOperatorClass;
901 
902   case OO_SlashEqual:
903     BinaryOp = BO_DivAssign;
904     return Stmt::CompoundAssignOperatorClass;
905 
906   case OO_PercentEqual:
907     BinaryOp = BO_RemAssign;
908     return Stmt::CompoundAssignOperatorClass;
909 
910   case OO_CaretEqual:
911     BinaryOp = BO_XorAssign;
912     return Stmt::CompoundAssignOperatorClass;
913 
914   case OO_AmpEqual:
915     BinaryOp = BO_AndAssign;
916     return Stmt::CompoundAssignOperatorClass;
917 
918   case OO_PipeEqual:
919     BinaryOp = BO_OrAssign;
920     return Stmt::CompoundAssignOperatorClass;
921 
922   case OO_LessLess:
923     BinaryOp = BO_Shl;
924     return Stmt::BinaryOperatorClass;
925 
926   case OO_GreaterGreater:
927     BinaryOp = BO_Shr;
928     return Stmt::BinaryOperatorClass;
929 
930   case OO_LessLessEqual:
931     BinaryOp = BO_ShlAssign;
932     return Stmt::CompoundAssignOperatorClass;
933 
934   case OO_GreaterGreaterEqual:
935     BinaryOp = BO_ShrAssign;
936     return Stmt::CompoundAssignOperatorClass;
937 
938   case OO_EqualEqual:
939     BinaryOp = BO_EQ;
940     return Stmt::BinaryOperatorClass;
941 
942   case OO_ExclaimEqual:
943     BinaryOp = BO_NE;
944     return Stmt::BinaryOperatorClass;
945 
946   case OO_LessEqual:
947     BinaryOp = BO_LE;
948     return Stmt::BinaryOperatorClass;
949 
950   case OO_GreaterEqual:
951     BinaryOp = BO_GE;
952     return Stmt::BinaryOperatorClass;
953 
954   case OO_AmpAmp:
955     BinaryOp = BO_LAnd;
956     return Stmt::BinaryOperatorClass;
957 
958   case OO_PipePipe:
959     BinaryOp = BO_LOr;
960     return Stmt::BinaryOperatorClass;
961 
962   case OO_PlusPlus:
963     UnaryOp = S->getNumArgs() == 1? UO_PreInc
964                                   : UO_PostInc;
965     return Stmt::UnaryOperatorClass;
966 
967   case OO_MinusMinus:
968     UnaryOp = S->getNumArgs() == 1? UO_PreDec
969                                   : UO_PostDec;
970     return Stmt::UnaryOperatorClass;
971 
972   case OO_Comma:
973     BinaryOp = BO_Comma;
974     return Stmt::BinaryOperatorClass;
975 
976 
977   case OO_ArrowStar:
978     BinaryOp = BO_PtrMemI;
979     return Stmt::BinaryOperatorClass;
980 
981   case OO_Subscript:
982     return Stmt::ArraySubscriptExprClass;
983   }
984 
985   llvm_unreachable("Invalid overloaded operator expression");
986 }
987 
988 
989 void StmtProfiler::VisitCXXOperatorCallExpr(const CXXOperatorCallExpr *S) {
990   if (S->isTypeDependent()) {
991     // Type-dependent operator calls are profiled like their underlying
992     // syntactic operator.
993     UnaryOperatorKind UnaryOp = UO_Extension;
994     BinaryOperatorKind BinaryOp = BO_Comma;
995     Stmt::StmtClass SC = DecodeOperatorCall(S, UnaryOp, BinaryOp);
996 
997     ID.AddInteger(SC);
998     for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
999       Visit(S->getArg(I));
1000     if (SC == Stmt::UnaryOperatorClass)
1001       ID.AddInteger(UnaryOp);
1002     else if (SC == Stmt::BinaryOperatorClass ||
1003              SC == Stmt::CompoundAssignOperatorClass)
1004       ID.AddInteger(BinaryOp);
1005     else
1006       assert(SC == Stmt::ArraySubscriptExprClass);
1007 
1008     return;
1009   }
1010 
1011   VisitCallExpr(S);
1012   ID.AddInteger(S->getOperator());
1013 }
1014 
1015 void StmtProfiler::VisitCXXMemberCallExpr(const CXXMemberCallExpr *S) {
1016   VisitCallExpr(S);
1017 }
1018 
1019 void StmtProfiler::VisitCUDAKernelCallExpr(const CUDAKernelCallExpr *S) {
1020   VisitCallExpr(S);
1021 }
1022 
1023 void StmtProfiler::VisitAsTypeExpr(const AsTypeExpr *S) {
1024   VisitExpr(S);
1025 }
1026 
1027 void StmtProfiler::VisitCXXNamedCastExpr(const CXXNamedCastExpr *S) {
1028   VisitExplicitCastExpr(S);
1029 }
1030 
1031 void StmtProfiler::VisitCXXStaticCastExpr(const CXXStaticCastExpr *S) {
1032   VisitCXXNamedCastExpr(S);
1033 }
1034 
1035 void StmtProfiler::VisitCXXDynamicCastExpr(const CXXDynamicCastExpr *S) {
1036   VisitCXXNamedCastExpr(S);
1037 }
1038 
1039 void
1040 StmtProfiler::VisitCXXReinterpretCastExpr(const CXXReinterpretCastExpr *S) {
1041   VisitCXXNamedCastExpr(S);
1042 }
1043 
1044 void StmtProfiler::VisitCXXConstCastExpr(const CXXConstCastExpr *S) {
1045   VisitCXXNamedCastExpr(S);
1046 }
1047 
1048 void StmtProfiler::VisitUserDefinedLiteral(const UserDefinedLiteral *S) {
1049   VisitCallExpr(S);
1050 }
1051 
1052 void StmtProfiler::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *S) {
1053   VisitExpr(S);
1054   ID.AddBoolean(S->getValue());
1055 }
1056 
1057 void StmtProfiler::VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *S) {
1058   VisitExpr(S);
1059 }
1060 
1061 void StmtProfiler::VisitCXXStdInitializerListExpr(
1062     const CXXStdInitializerListExpr *S) {
1063   VisitExpr(S);
1064 }
1065 
1066 void StmtProfiler::VisitCXXTypeidExpr(const CXXTypeidExpr *S) {
1067   VisitExpr(S);
1068   if (S->isTypeOperand())
1069     VisitType(S->getTypeOperandSourceInfo()->getType());
1070 }
1071 
1072 void StmtProfiler::VisitCXXUuidofExpr(const CXXUuidofExpr *S) {
1073   VisitExpr(S);
1074   if (S->isTypeOperand())
1075     VisitType(S->getTypeOperandSourceInfo()->getType());
1076 }
1077 
1078 void StmtProfiler::VisitMSPropertyRefExpr(const MSPropertyRefExpr *S) {
1079   VisitExpr(S);
1080   VisitDecl(S->getPropertyDecl());
1081 }
1082 
1083 void StmtProfiler::VisitCXXThisExpr(const CXXThisExpr *S) {
1084   VisitExpr(S);
1085   ID.AddBoolean(S->isImplicit());
1086 }
1087 
1088 void StmtProfiler::VisitCXXThrowExpr(const CXXThrowExpr *S) {
1089   VisitExpr(S);
1090 }
1091 
1092 void StmtProfiler::VisitCXXDefaultArgExpr(const CXXDefaultArgExpr *S) {
1093   VisitExpr(S);
1094   VisitDecl(S->getParam());
1095 }
1096 
1097 void StmtProfiler::VisitCXXDefaultInitExpr(const CXXDefaultInitExpr *S) {
1098   VisitExpr(S);
1099   VisitDecl(S->getField());
1100 }
1101 
1102 void StmtProfiler::VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *S) {
1103   VisitExpr(S);
1104   VisitDecl(
1105          const_cast<CXXDestructorDecl *>(S->getTemporary()->getDestructor()));
1106 }
1107 
1108 void StmtProfiler::VisitCXXConstructExpr(const CXXConstructExpr *S) {
1109   VisitExpr(S);
1110   VisitDecl(S->getConstructor());
1111   ID.AddBoolean(S->isElidable());
1112 }
1113 
1114 void StmtProfiler::VisitCXXFunctionalCastExpr(const CXXFunctionalCastExpr *S) {
1115   VisitExplicitCastExpr(S);
1116 }
1117 
1118 void
1119 StmtProfiler::VisitCXXTemporaryObjectExpr(const CXXTemporaryObjectExpr *S) {
1120   VisitCXXConstructExpr(S);
1121 }
1122 
1123 void
1124 StmtProfiler::VisitLambdaExpr(const LambdaExpr *S) {
1125   VisitExpr(S);
1126   for (LambdaExpr::capture_iterator C = S->explicit_capture_begin(),
1127                                  CEnd = S->explicit_capture_end();
1128        C != CEnd; ++C) {
1129     ID.AddInteger(C->getCaptureKind());
1130     switch (C->getCaptureKind()) {
1131     case LCK_This:
1132       break;
1133     case LCK_ByRef:
1134     case LCK_ByCopy:
1135       VisitDecl(C->getCapturedVar());
1136       ID.AddBoolean(C->isPackExpansion());
1137       break;
1138     case LCK_VLAType:
1139       llvm_unreachable("VLA type in explicit captures.");
1140     }
1141   }
1142   // Note: If we actually needed to be able to match lambda
1143   // expressions, we would have to consider parameters and return type
1144   // here, among other things.
1145   VisitStmt(S->getBody());
1146 }
1147 
1148 void
1149 StmtProfiler::VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *S) {
1150   VisitExpr(S);
1151 }
1152 
1153 void StmtProfiler::VisitCXXDeleteExpr(const CXXDeleteExpr *S) {
1154   VisitExpr(S);
1155   ID.AddBoolean(S->isGlobalDelete());
1156   ID.AddBoolean(S->isArrayForm());
1157   VisitDecl(S->getOperatorDelete());
1158 }
1159 
1160 
1161 void StmtProfiler::VisitCXXNewExpr(const CXXNewExpr *S) {
1162   VisitExpr(S);
1163   VisitType(S->getAllocatedType());
1164   VisitDecl(S->getOperatorNew());
1165   VisitDecl(S->getOperatorDelete());
1166   ID.AddBoolean(S->isArray());
1167   ID.AddInteger(S->getNumPlacementArgs());
1168   ID.AddBoolean(S->isGlobalNew());
1169   ID.AddBoolean(S->isParenTypeId());
1170   ID.AddInteger(S->getInitializationStyle());
1171 }
1172 
1173 void
1174 StmtProfiler::VisitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *S) {
1175   VisitExpr(S);
1176   ID.AddBoolean(S->isArrow());
1177   VisitNestedNameSpecifier(S->getQualifier());
1178   ID.AddBoolean(S->getScopeTypeInfo() != nullptr);
1179   if (S->getScopeTypeInfo())
1180     VisitType(S->getScopeTypeInfo()->getType());
1181   ID.AddBoolean(S->getDestroyedTypeInfo() != nullptr);
1182   if (S->getDestroyedTypeInfo())
1183     VisitType(S->getDestroyedType());
1184   else
1185     ID.AddPointer(S->getDestroyedTypeIdentifier());
1186 }
1187 
1188 void StmtProfiler::VisitOverloadExpr(const OverloadExpr *S) {
1189   VisitExpr(S);
1190   VisitNestedNameSpecifier(S->getQualifier());
1191   VisitName(S->getName());
1192   ID.AddBoolean(S->hasExplicitTemplateArgs());
1193   if (S->hasExplicitTemplateArgs())
1194     VisitTemplateArguments(S->getExplicitTemplateArgs().getTemplateArgs(),
1195                            S->getExplicitTemplateArgs().NumTemplateArgs);
1196 }
1197 
1198 void
1199 StmtProfiler::VisitUnresolvedLookupExpr(const UnresolvedLookupExpr *S) {
1200   VisitOverloadExpr(S);
1201 }
1202 
1203 void StmtProfiler::VisitTypeTraitExpr(const TypeTraitExpr *S) {
1204   VisitExpr(S);
1205   ID.AddInteger(S->getTrait());
1206   ID.AddInteger(S->getNumArgs());
1207   for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
1208     VisitType(S->getArg(I)->getType());
1209 }
1210 
1211 void StmtProfiler::VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *S) {
1212   VisitExpr(S);
1213   ID.AddInteger(S->getTrait());
1214   VisitType(S->getQueriedType());
1215 }
1216 
1217 void StmtProfiler::VisitExpressionTraitExpr(const ExpressionTraitExpr *S) {
1218   VisitExpr(S);
1219   ID.AddInteger(S->getTrait());
1220   VisitExpr(S->getQueriedExpression());
1221 }
1222 
1223 void StmtProfiler::VisitDependentScopeDeclRefExpr(
1224     const DependentScopeDeclRefExpr *S) {
1225   VisitExpr(S);
1226   VisitName(S->getDeclName());
1227   VisitNestedNameSpecifier(S->getQualifier());
1228   ID.AddBoolean(S->hasExplicitTemplateArgs());
1229   if (S->hasExplicitTemplateArgs())
1230     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1231 }
1232 
1233 void StmtProfiler::VisitExprWithCleanups(const ExprWithCleanups *S) {
1234   VisitExpr(S);
1235 }
1236 
1237 void StmtProfiler::VisitCXXUnresolvedConstructExpr(
1238     const CXXUnresolvedConstructExpr *S) {
1239   VisitExpr(S);
1240   VisitType(S->getTypeAsWritten());
1241 }
1242 
1243 void StmtProfiler::VisitCXXDependentScopeMemberExpr(
1244     const CXXDependentScopeMemberExpr *S) {
1245   ID.AddBoolean(S->isImplicitAccess());
1246   if (!S->isImplicitAccess()) {
1247     VisitExpr(S);
1248     ID.AddBoolean(S->isArrow());
1249   }
1250   VisitNestedNameSpecifier(S->getQualifier());
1251   VisitName(S->getMember());
1252   ID.AddBoolean(S->hasExplicitTemplateArgs());
1253   if (S->hasExplicitTemplateArgs())
1254     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1255 }
1256 
1257 void StmtProfiler::VisitUnresolvedMemberExpr(const UnresolvedMemberExpr *S) {
1258   ID.AddBoolean(S->isImplicitAccess());
1259   if (!S->isImplicitAccess()) {
1260     VisitExpr(S);
1261     ID.AddBoolean(S->isArrow());
1262   }
1263   VisitNestedNameSpecifier(S->getQualifier());
1264   VisitName(S->getMemberName());
1265   ID.AddBoolean(S->hasExplicitTemplateArgs());
1266   if (S->hasExplicitTemplateArgs())
1267     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1268 }
1269 
1270 void StmtProfiler::VisitCXXNoexceptExpr(const CXXNoexceptExpr *S) {
1271   VisitExpr(S);
1272 }
1273 
1274 void StmtProfiler::VisitPackExpansionExpr(const PackExpansionExpr *S) {
1275   VisitExpr(S);
1276 }
1277 
1278 void StmtProfiler::VisitSizeOfPackExpr(const SizeOfPackExpr *S) {
1279   VisitExpr(S);
1280   VisitDecl(S->getPack());
1281 }
1282 
1283 void StmtProfiler::VisitSubstNonTypeTemplateParmPackExpr(
1284     const SubstNonTypeTemplateParmPackExpr *S) {
1285   VisitExpr(S);
1286   VisitDecl(S->getParameterPack());
1287   VisitTemplateArgument(S->getArgumentPack());
1288 }
1289 
1290 void StmtProfiler::VisitSubstNonTypeTemplateParmExpr(
1291     const SubstNonTypeTemplateParmExpr *E) {
1292   // Profile exactly as the replacement expression.
1293   Visit(E->getReplacement());
1294 }
1295 
1296 void StmtProfiler::VisitFunctionParmPackExpr(const FunctionParmPackExpr *S) {
1297   VisitExpr(S);
1298   VisitDecl(S->getParameterPack());
1299   ID.AddInteger(S->getNumExpansions());
1300   for (FunctionParmPackExpr::iterator I = S->begin(), E = S->end(); I != E; ++I)
1301     VisitDecl(*I);
1302 }
1303 
1304 void StmtProfiler::VisitMaterializeTemporaryExpr(
1305                                            const MaterializeTemporaryExpr *S) {
1306   VisitExpr(S);
1307 }
1308 
1309 void StmtProfiler::VisitCXXFoldExpr(const CXXFoldExpr *S) {
1310   VisitExpr(S);
1311   ID.AddInteger(S->getOperator());
1312 }
1313 
1314 void StmtProfiler::VisitOpaqueValueExpr(const OpaqueValueExpr *E) {
1315   VisitExpr(E);
1316 }
1317 
1318 void StmtProfiler::VisitTypoExpr(const TypoExpr *E) {
1319   VisitExpr(E);
1320 }
1321 
1322 void StmtProfiler::VisitObjCStringLiteral(const ObjCStringLiteral *S) {
1323   VisitExpr(S);
1324 }
1325 
1326 void StmtProfiler::VisitObjCBoxedExpr(const ObjCBoxedExpr *E) {
1327   VisitExpr(E);
1328 }
1329 
1330 void StmtProfiler::VisitObjCArrayLiteral(const ObjCArrayLiteral *E) {
1331   VisitExpr(E);
1332 }
1333 
1334 void StmtProfiler::VisitObjCDictionaryLiteral(const ObjCDictionaryLiteral *E) {
1335   VisitExpr(E);
1336 }
1337 
1338 void StmtProfiler::VisitObjCEncodeExpr(const ObjCEncodeExpr *S) {
1339   VisitExpr(S);
1340   VisitType(S->getEncodedType());
1341 }
1342 
1343 void StmtProfiler::VisitObjCSelectorExpr(const ObjCSelectorExpr *S) {
1344   VisitExpr(S);
1345   VisitName(S->getSelector());
1346 }
1347 
1348 void StmtProfiler::VisitObjCProtocolExpr(const ObjCProtocolExpr *S) {
1349   VisitExpr(S);
1350   VisitDecl(S->getProtocol());
1351 }
1352 
1353 void StmtProfiler::VisitObjCIvarRefExpr(const ObjCIvarRefExpr *S) {
1354   VisitExpr(S);
1355   VisitDecl(S->getDecl());
1356   ID.AddBoolean(S->isArrow());
1357   ID.AddBoolean(S->isFreeIvar());
1358 }
1359 
1360 void StmtProfiler::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *S) {
1361   VisitExpr(S);
1362   if (S->isImplicitProperty()) {
1363     VisitDecl(S->getImplicitPropertyGetter());
1364     VisitDecl(S->getImplicitPropertySetter());
1365   } else {
1366     VisitDecl(S->getExplicitProperty());
1367   }
1368   if (S->isSuperReceiver()) {
1369     ID.AddBoolean(S->isSuperReceiver());
1370     VisitType(S->getSuperReceiverType());
1371   }
1372 }
1373 
1374 void StmtProfiler::VisitObjCSubscriptRefExpr(const ObjCSubscriptRefExpr *S) {
1375   VisitExpr(S);
1376   VisitDecl(S->getAtIndexMethodDecl());
1377   VisitDecl(S->setAtIndexMethodDecl());
1378 }
1379 
1380 void StmtProfiler::VisitObjCMessageExpr(const ObjCMessageExpr *S) {
1381   VisitExpr(S);
1382   VisitName(S->getSelector());
1383   VisitDecl(S->getMethodDecl());
1384 }
1385 
1386 void StmtProfiler::VisitObjCIsaExpr(const ObjCIsaExpr *S) {
1387   VisitExpr(S);
1388   ID.AddBoolean(S->isArrow());
1389 }
1390 
1391 void StmtProfiler::VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *S) {
1392   VisitExpr(S);
1393   ID.AddBoolean(S->getValue());
1394 }
1395 
1396 void StmtProfiler::VisitObjCIndirectCopyRestoreExpr(
1397     const ObjCIndirectCopyRestoreExpr *S) {
1398   VisitExpr(S);
1399   ID.AddBoolean(S->shouldCopy());
1400 }
1401 
1402 void StmtProfiler::VisitObjCBridgedCastExpr(const ObjCBridgedCastExpr *S) {
1403   VisitExplicitCastExpr(S);
1404   ID.AddBoolean(S->getBridgeKind());
1405 }
1406 
1407 void StmtProfiler::VisitDecl(const Decl *D) {
1408   ID.AddInteger(D? D->getKind() : 0);
1409 
1410   if (Canonical && D) {
1411     if (const NonTypeTemplateParmDecl *NTTP =
1412           dyn_cast<NonTypeTemplateParmDecl>(D)) {
1413       ID.AddInteger(NTTP->getDepth());
1414       ID.AddInteger(NTTP->getIndex());
1415       ID.AddBoolean(NTTP->isParameterPack());
1416       VisitType(NTTP->getType());
1417       return;
1418     }
1419 
1420     if (const ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D)) {
1421       // The Itanium C++ ABI uses the type, scope depth, and scope
1422       // index of a parameter when mangling expressions that involve
1423       // function parameters, so we will use the parameter's type for
1424       // establishing function parameter identity. That way, our
1425       // definition of "equivalent" (per C++ [temp.over.link]) is at
1426       // least as strong as the definition of "equivalent" used for
1427       // name mangling.
1428       VisitType(Parm->getType());
1429       ID.AddInteger(Parm->getFunctionScopeDepth());
1430       ID.AddInteger(Parm->getFunctionScopeIndex());
1431       return;
1432     }
1433 
1434     if (const TemplateTypeParmDecl *TTP =
1435           dyn_cast<TemplateTypeParmDecl>(D)) {
1436       ID.AddInteger(TTP->getDepth());
1437       ID.AddInteger(TTP->getIndex());
1438       ID.AddBoolean(TTP->isParameterPack());
1439       return;
1440     }
1441 
1442     if (const TemplateTemplateParmDecl *TTP =
1443           dyn_cast<TemplateTemplateParmDecl>(D)) {
1444       ID.AddInteger(TTP->getDepth());
1445       ID.AddInteger(TTP->getIndex());
1446       ID.AddBoolean(TTP->isParameterPack());
1447       return;
1448     }
1449   }
1450 
1451   ID.AddPointer(D? D->getCanonicalDecl() : nullptr);
1452 }
1453 
1454 void StmtProfiler::VisitType(QualType T) {
1455   if (Canonical)
1456     T = Context.getCanonicalType(T);
1457 
1458   ID.AddPointer(T.getAsOpaquePtr());
1459 }
1460 
1461 void StmtProfiler::VisitName(DeclarationName Name) {
1462   ID.AddPointer(Name.getAsOpaquePtr());
1463 }
1464 
1465 void StmtProfiler::VisitNestedNameSpecifier(NestedNameSpecifier *NNS) {
1466   if (Canonical)
1467     NNS = Context.getCanonicalNestedNameSpecifier(NNS);
1468   ID.AddPointer(NNS);
1469 }
1470 
1471 void StmtProfiler::VisitTemplateName(TemplateName Name) {
1472   if (Canonical)
1473     Name = Context.getCanonicalTemplateName(Name);
1474 
1475   Name.Profile(ID);
1476 }
1477 
1478 void StmtProfiler::VisitTemplateArguments(const TemplateArgumentLoc *Args,
1479                                           unsigned NumArgs) {
1480   ID.AddInteger(NumArgs);
1481   for (unsigned I = 0; I != NumArgs; ++I)
1482     VisitTemplateArgument(Args[I].getArgument());
1483 }
1484 
1485 void StmtProfiler::VisitTemplateArgument(const TemplateArgument &Arg) {
1486   // Mostly repetitive with TemplateArgument::Profile!
1487   ID.AddInteger(Arg.getKind());
1488   switch (Arg.getKind()) {
1489   case TemplateArgument::Null:
1490     break;
1491 
1492   case TemplateArgument::Type:
1493     VisitType(Arg.getAsType());
1494     break;
1495 
1496   case TemplateArgument::Template:
1497   case TemplateArgument::TemplateExpansion:
1498     VisitTemplateName(Arg.getAsTemplateOrTemplatePattern());
1499     break;
1500 
1501   case TemplateArgument::Declaration:
1502     VisitDecl(Arg.getAsDecl());
1503     break;
1504 
1505   case TemplateArgument::NullPtr:
1506     VisitType(Arg.getNullPtrType());
1507     break;
1508 
1509   case TemplateArgument::Integral:
1510     Arg.getAsIntegral().Profile(ID);
1511     VisitType(Arg.getIntegralType());
1512     break;
1513 
1514   case TemplateArgument::Expression:
1515     Visit(Arg.getAsExpr());
1516     break;
1517 
1518   case TemplateArgument::Pack:
1519     for (const auto &P : Arg.pack_elements())
1520       VisitTemplateArgument(P);
1521     break;
1522   }
1523 }
1524 
1525 void Stmt::Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
1526                    bool Canonical) const {
1527   StmtProfiler Profiler(ID, Context, Canonical);
1528   Profiler.Visit(this);
1529 }
1530