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