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::VisitCapturedStmt(const CapturedStmt *S) {
218   VisitStmt(S);
219 }
220 
221 void StmtProfiler::VisitObjCForCollectionStmt(const ObjCForCollectionStmt *S) {
222   VisitStmt(S);
223 }
224 
225 void StmtProfiler::VisitObjCAtCatchStmt(const ObjCAtCatchStmt *S) {
226   VisitStmt(S);
227   ID.AddBoolean(S->hasEllipsis());
228   if (S->getCatchParamDecl())
229     VisitType(S->getCatchParamDecl()->getType());
230 }
231 
232 void StmtProfiler::VisitObjCAtFinallyStmt(const ObjCAtFinallyStmt *S) {
233   VisitStmt(S);
234 }
235 
236 void StmtProfiler::VisitObjCAtTryStmt(const ObjCAtTryStmt *S) {
237   VisitStmt(S);
238 }
239 
240 void
241 StmtProfiler::VisitObjCAtSynchronizedStmt(const ObjCAtSynchronizedStmt *S) {
242   VisitStmt(S);
243 }
244 
245 void StmtProfiler::VisitObjCAtThrowStmt(const ObjCAtThrowStmt *S) {
246   VisitStmt(S);
247 }
248 
249 void
250 StmtProfiler::VisitObjCAutoreleasePoolStmt(const ObjCAutoreleasePoolStmt *S) {
251   VisitStmt(S);
252 }
253 
254 namespace {
255 class OMPClauseProfiler : public ConstOMPClauseVisitor<OMPClauseProfiler> {
256   StmtProfiler *Profiler;
257   /// \brief Process clauses with list of variables.
258   template <typename T>
259   void VisitOMPClauseList(T *Node);
260 public:
261   OMPClauseProfiler(StmtProfiler *P) : Profiler(P) { }
262 #define OPENMP_CLAUSE(Name, Class)                                             \
263   void Visit##Class(const Class *C);
264 #include "clang/Basic/OpenMPKinds.def"
265 };
266 
267 void OMPClauseProfiler::VisitOMPIfClause(const OMPIfClause *C) {
268   if (C->getCondition())
269     Profiler->VisitStmt(C->getCondition());
270 }
271 
272 void OMPClauseProfiler::VisitOMPNumThreadsClause(const OMPNumThreadsClause *C) {
273   if (C->getNumThreads())
274     Profiler->VisitStmt(C->getNumThreads());
275 }
276 
277 void OMPClauseProfiler::VisitOMPSafelenClause(const OMPSafelenClause *C) {
278   if (C->getSafelen())
279     Profiler->VisitStmt(C->getSafelen());
280 }
281 
282 void OMPClauseProfiler::VisitOMPCollapseClause(const OMPCollapseClause *C) {
283   if (C->getNumForLoops())
284     Profiler->VisitStmt(C->getNumForLoops());
285 }
286 
287 void OMPClauseProfiler::VisitOMPDefaultClause(const OMPDefaultClause *C) { }
288 
289 void OMPClauseProfiler::VisitOMPProcBindClause(const OMPProcBindClause *C) { }
290 
291 template<typename T>
292 void OMPClauseProfiler::VisitOMPClauseList(T *Node) {
293   for (auto *I : Node->varlists())
294     Profiler->VisitStmt(I);
295 }
296 
297 void OMPClauseProfiler::VisitOMPPrivateClause(const OMPPrivateClause *C) {
298   VisitOMPClauseList(C);
299 }
300 void OMPClauseProfiler::VisitOMPFirstprivateClause(
301                                          const OMPFirstprivateClause *C) {
302   VisitOMPClauseList(C);
303 }
304 void
305 OMPClauseProfiler::VisitOMPLastprivateClause(const OMPLastprivateClause *C) {
306   VisitOMPClauseList(C);
307 }
308 void OMPClauseProfiler::VisitOMPSharedClause(const OMPSharedClause *C) {
309   VisitOMPClauseList(C);
310 }
311 void OMPClauseProfiler::VisitOMPLinearClause(const OMPLinearClause *C) {
312   VisitOMPClauseList(C);
313   Profiler->VisitStmt(C->getStep());
314 }
315 void OMPClauseProfiler::VisitOMPAlignedClause(const OMPAlignedClause *C) {
316   VisitOMPClauseList(C);
317   Profiler->VisitStmt(C->getAlignment());
318 }
319 void OMPClauseProfiler::VisitOMPCopyinClause(const OMPCopyinClause *C) {
320   VisitOMPClauseList(C);
321 }
322 }
323 
324 void
325 StmtProfiler::VisitOMPExecutableDirective(const OMPExecutableDirective *S) {
326   VisitStmt(S);
327   OMPClauseProfiler P(this);
328   ArrayRef<OMPClause *> Clauses = S->clauses();
329   for (ArrayRef<OMPClause *>::iterator I = Clauses.begin(), E = Clauses.end();
330        I != E; ++I)
331     if (*I)
332       P.Visit(*I);
333 }
334 
335 void StmtProfiler::VisitOMPParallelDirective(const OMPParallelDirective *S) {
336   VisitOMPExecutableDirective(S);
337 }
338 
339 void StmtProfiler::VisitOMPSimdDirective(const OMPSimdDirective *S) {
340   VisitOMPExecutableDirective(S);
341 }
342 
343 void StmtProfiler::VisitExpr(const Expr *S) {
344   VisitStmt(S);
345 }
346 
347 void StmtProfiler::VisitDeclRefExpr(const DeclRefExpr *S) {
348   VisitExpr(S);
349   if (!Canonical)
350     VisitNestedNameSpecifier(S->getQualifier());
351   VisitDecl(S->getDecl());
352   if (!Canonical)
353     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
354 }
355 
356 void StmtProfiler::VisitPredefinedExpr(const PredefinedExpr *S) {
357   VisitExpr(S);
358   ID.AddInteger(S->getIdentType());
359 }
360 
361 void StmtProfiler::VisitIntegerLiteral(const IntegerLiteral *S) {
362   VisitExpr(S);
363   S->getValue().Profile(ID);
364 }
365 
366 void StmtProfiler::VisitCharacterLiteral(const CharacterLiteral *S) {
367   VisitExpr(S);
368   ID.AddInteger(S->getKind());
369   ID.AddInteger(S->getValue());
370 }
371 
372 void StmtProfiler::VisitFloatingLiteral(const FloatingLiteral *S) {
373   VisitExpr(S);
374   S->getValue().Profile(ID);
375   ID.AddBoolean(S->isExact());
376 }
377 
378 void StmtProfiler::VisitImaginaryLiteral(const ImaginaryLiteral *S) {
379   VisitExpr(S);
380 }
381 
382 void StmtProfiler::VisitStringLiteral(const StringLiteral *S) {
383   VisitExpr(S);
384   ID.AddString(S->getBytes());
385   ID.AddInteger(S->getKind());
386 }
387 
388 void StmtProfiler::VisitParenExpr(const ParenExpr *S) {
389   VisitExpr(S);
390 }
391 
392 void StmtProfiler::VisitParenListExpr(const ParenListExpr *S) {
393   VisitExpr(S);
394 }
395 
396 void StmtProfiler::VisitUnaryOperator(const UnaryOperator *S) {
397   VisitExpr(S);
398   ID.AddInteger(S->getOpcode());
399 }
400 
401 void StmtProfiler::VisitOffsetOfExpr(const OffsetOfExpr *S) {
402   VisitType(S->getTypeSourceInfo()->getType());
403   unsigned n = S->getNumComponents();
404   for (unsigned i = 0; i < n; ++i) {
405     const OffsetOfExpr::OffsetOfNode& ON = S->getComponent(i);
406     ID.AddInteger(ON.getKind());
407     switch (ON.getKind()) {
408     case OffsetOfExpr::OffsetOfNode::Array:
409       // Expressions handled below.
410       break;
411 
412     case OffsetOfExpr::OffsetOfNode::Field:
413       VisitDecl(ON.getField());
414       break;
415 
416     case OffsetOfExpr::OffsetOfNode::Identifier:
417       ID.AddPointer(ON.getFieldName());
418       break;
419 
420     case OffsetOfExpr::OffsetOfNode::Base:
421       // These nodes are implicit, and therefore don't need profiling.
422       break;
423     }
424   }
425 
426   VisitExpr(S);
427 }
428 
429 void
430 StmtProfiler::VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *S) {
431   VisitExpr(S);
432   ID.AddInteger(S->getKind());
433   if (S->isArgumentType())
434     VisitType(S->getArgumentType());
435 }
436 
437 void StmtProfiler::VisitArraySubscriptExpr(const ArraySubscriptExpr *S) {
438   VisitExpr(S);
439 }
440 
441 void StmtProfiler::VisitCallExpr(const CallExpr *S) {
442   VisitExpr(S);
443 }
444 
445 void StmtProfiler::VisitMemberExpr(const MemberExpr *S) {
446   VisitExpr(S);
447   VisitDecl(S->getMemberDecl());
448   if (!Canonical)
449     VisitNestedNameSpecifier(S->getQualifier());
450   ID.AddBoolean(S->isArrow());
451 }
452 
453 void StmtProfiler::VisitCompoundLiteralExpr(const CompoundLiteralExpr *S) {
454   VisitExpr(S);
455   ID.AddBoolean(S->isFileScope());
456 }
457 
458 void StmtProfiler::VisitCastExpr(const CastExpr *S) {
459   VisitExpr(S);
460 }
461 
462 void StmtProfiler::VisitImplicitCastExpr(const ImplicitCastExpr *S) {
463   VisitCastExpr(S);
464   ID.AddInteger(S->getValueKind());
465 }
466 
467 void StmtProfiler::VisitExplicitCastExpr(const ExplicitCastExpr *S) {
468   VisitCastExpr(S);
469   VisitType(S->getTypeAsWritten());
470 }
471 
472 void StmtProfiler::VisitCStyleCastExpr(const CStyleCastExpr *S) {
473   VisitExplicitCastExpr(S);
474 }
475 
476 void StmtProfiler::VisitBinaryOperator(const BinaryOperator *S) {
477   VisitExpr(S);
478   ID.AddInteger(S->getOpcode());
479 }
480 
481 void
482 StmtProfiler::VisitCompoundAssignOperator(const CompoundAssignOperator *S) {
483   VisitBinaryOperator(S);
484 }
485 
486 void StmtProfiler::VisitConditionalOperator(const ConditionalOperator *S) {
487   VisitExpr(S);
488 }
489 
490 void StmtProfiler::VisitBinaryConditionalOperator(
491     const BinaryConditionalOperator *S) {
492   VisitExpr(S);
493 }
494 
495 void StmtProfiler::VisitAddrLabelExpr(const AddrLabelExpr *S) {
496   VisitExpr(S);
497   VisitDecl(S->getLabel());
498 }
499 
500 void StmtProfiler::VisitStmtExpr(const StmtExpr *S) {
501   VisitExpr(S);
502 }
503 
504 void StmtProfiler::VisitShuffleVectorExpr(const ShuffleVectorExpr *S) {
505   VisitExpr(S);
506 }
507 
508 void StmtProfiler::VisitConvertVectorExpr(const ConvertVectorExpr *S) {
509   VisitExpr(S);
510 }
511 
512 void StmtProfiler::VisitChooseExpr(const ChooseExpr *S) {
513   VisitExpr(S);
514 }
515 
516 void StmtProfiler::VisitGNUNullExpr(const GNUNullExpr *S) {
517   VisitExpr(S);
518 }
519 
520 void StmtProfiler::VisitVAArgExpr(const VAArgExpr *S) {
521   VisitExpr(S);
522 }
523 
524 void StmtProfiler::VisitInitListExpr(const InitListExpr *S) {
525   if (S->getSyntacticForm()) {
526     VisitInitListExpr(S->getSyntacticForm());
527     return;
528   }
529 
530   VisitExpr(S);
531 }
532 
533 void StmtProfiler::VisitDesignatedInitExpr(const DesignatedInitExpr *S) {
534   VisitExpr(S);
535   ID.AddBoolean(S->usesGNUSyntax());
536   for (DesignatedInitExpr::const_designators_iterator D =
537          S->designators_begin(), DEnd = S->designators_end();
538        D != DEnd; ++D) {
539     if (D->isFieldDesignator()) {
540       ID.AddInteger(0);
541       VisitName(D->getFieldName());
542       continue;
543     }
544 
545     if (D->isArrayDesignator()) {
546       ID.AddInteger(1);
547     } else {
548       assert(D->isArrayRangeDesignator());
549       ID.AddInteger(2);
550     }
551     ID.AddInteger(D->getFirstExprIndex());
552   }
553 }
554 
555 void StmtProfiler::VisitImplicitValueInitExpr(const ImplicitValueInitExpr *S) {
556   VisitExpr(S);
557 }
558 
559 void StmtProfiler::VisitExtVectorElementExpr(const ExtVectorElementExpr *S) {
560   VisitExpr(S);
561   VisitName(&S->getAccessor());
562 }
563 
564 void StmtProfiler::VisitBlockExpr(const BlockExpr *S) {
565   VisitExpr(S);
566   VisitDecl(S->getBlockDecl());
567 }
568 
569 void StmtProfiler::VisitGenericSelectionExpr(const GenericSelectionExpr *S) {
570   VisitExpr(S);
571   for (unsigned i = 0; i != S->getNumAssocs(); ++i) {
572     QualType T = S->getAssocType(i);
573     if (T.isNull())
574       ID.AddPointer(nullptr);
575     else
576       VisitType(T);
577     VisitExpr(S->getAssocExpr(i));
578   }
579 }
580 
581 void StmtProfiler::VisitPseudoObjectExpr(const PseudoObjectExpr *S) {
582   VisitExpr(S);
583   for (PseudoObjectExpr::const_semantics_iterator
584          i = S->semantics_begin(), e = S->semantics_end(); i != e; ++i)
585     // Normally, we would not profile the source expressions of OVEs.
586     if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(*i))
587       Visit(OVE->getSourceExpr());
588 }
589 
590 void StmtProfiler::VisitAtomicExpr(const AtomicExpr *S) {
591   VisitExpr(S);
592   ID.AddInteger(S->getOp());
593 }
594 
595 static Stmt::StmtClass DecodeOperatorCall(const CXXOperatorCallExpr *S,
596                                           UnaryOperatorKind &UnaryOp,
597                                           BinaryOperatorKind &BinaryOp) {
598   switch (S->getOperator()) {
599   case OO_None:
600   case OO_New:
601   case OO_Delete:
602   case OO_Array_New:
603   case OO_Array_Delete:
604   case OO_Arrow:
605   case OO_Call:
606   case OO_Conditional:
607   case NUM_OVERLOADED_OPERATORS:
608     llvm_unreachable("Invalid operator call kind");
609 
610   case OO_Plus:
611     if (S->getNumArgs() == 1) {
612       UnaryOp = UO_Plus;
613       return Stmt::UnaryOperatorClass;
614     }
615 
616     BinaryOp = BO_Add;
617     return Stmt::BinaryOperatorClass;
618 
619   case OO_Minus:
620     if (S->getNumArgs() == 1) {
621       UnaryOp = UO_Minus;
622       return Stmt::UnaryOperatorClass;
623     }
624 
625     BinaryOp = BO_Sub;
626     return Stmt::BinaryOperatorClass;
627 
628   case OO_Star:
629     if (S->getNumArgs() == 1) {
630       UnaryOp = UO_Deref;
631       return Stmt::UnaryOperatorClass;
632     }
633 
634     BinaryOp = BO_Mul;
635     return Stmt::BinaryOperatorClass;
636 
637   case OO_Slash:
638     BinaryOp = BO_Div;
639     return Stmt::BinaryOperatorClass;
640 
641   case OO_Percent:
642     BinaryOp = BO_Rem;
643     return Stmt::BinaryOperatorClass;
644 
645   case OO_Caret:
646     BinaryOp = BO_Xor;
647     return Stmt::BinaryOperatorClass;
648 
649   case OO_Amp:
650     if (S->getNumArgs() == 1) {
651       UnaryOp = UO_AddrOf;
652       return Stmt::UnaryOperatorClass;
653     }
654 
655     BinaryOp = BO_And;
656     return Stmt::BinaryOperatorClass;
657 
658   case OO_Pipe:
659     BinaryOp = BO_Or;
660     return Stmt::BinaryOperatorClass;
661 
662   case OO_Tilde:
663     UnaryOp = UO_Not;
664     return Stmt::UnaryOperatorClass;
665 
666   case OO_Exclaim:
667     UnaryOp = UO_LNot;
668     return Stmt::UnaryOperatorClass;
669 
670   case OO_Equal:
671     BinaryOp = BO_Assign;
672     return Stmt::BinaryOperatorClass;
673 
674   case OO_Less:
675     BinaryOp = BO_LT;
676     return Stmt::BinaryOperatorClass;
677 
678   case OO_Greater:
679     BinaryOp = BO_GT;
680     return Stmt::BinaryOperatorClass;
681 
682   case OO_PlusEqual:
683     BinaryOp = BO_AddAssign;
684     return Stmt::CompoundAssignOperatorClass;
685 
686   case OO_MinusEqual:
687     BinaryOp = BO_SubAssign;
688     return Stmt::CompoundAssignOperatorClass;
689 
690   case OO_StarEqual:
691     BinaryOp = BO_MulAssign;
692     return Stmt::CompoundAssignOperatorClass;
693 
694   case OO_SlashEqual:
695     BinaryOp = BO_DivAssign;
696     return Stmt::CompoundAssignOperatorClass;
697 
698   case OO_PercentEqual:
699     BinaryOp = BO_RemAssign;
700     return Stmt::CompoundAssignOperatorClass;
701 
702   case OO_CaretEqual:
703     BinaryOp = BO_XorAssign;
704     return Stmt::CompoundAssignOperatorClass;
705 
706   case OO_AmpEqual:
707     BinaryOp = BO_AndAssign;
708     return Stmt::CompoundAssignOperatorClass;
709 
710   case OO_PipeEqual:
711     BinaryOp = BO_OrAssign;
712     return Stmt::CompoundAssignOperatorClass;
713 
714   case OO_LessLess:
715     BinaryOp = BO_Shl;
716     return Stmt::BinaryOperatorClass;
717 
718   case OO_GreaterGreater:
719     BinaryOp = BO_Shr;
720     return Stmt::BinaryOperatorClass;
721 
722   case OO_LessLessEqual:
723     BinaryOp = BO_ShlAssign;
724     return Stmt::CompoundAssignOperatorClass;
725 
726   case OO_GreaterGreaterEqual:
727     BinaryOp = BO_ShrAssign;
728     return Stmt::CompoundAssignOperatorClass;
729 
730   case OO_EqualEqual:
731     BinaryOp = BO_EQ;
732     return Stmt::BinaryOperatorClass;
733 
734   case OO_ExclaimEqual:
735     BinaryOp = BO_NE;
736     return Stmt::BinaryOperatorClass;
737 
738   case OO_LessEqual:
739     BinaryOp = BO_LE;
740     return Stmt::BinaryOperatorClass;
741 
742   case OO_GreaterEqual:
743     BinaryOp = BO_GE;
744     return Stmt::BinaryOperatorClass;
745 
746   case OO_AmpAmp:
747     BinaryOp = BO_LAnd;
748     return Stmt::BinaryOperatorClass;
749 
750   case OO_PipePipe:
751     BinaryOp = BO_LOr;
752     return Stmt::BinaryOperatorClass;
753 
754   case OO_PlusPlus:
755     UnaryOp = S->getNumArgs() == 1? UO_PreInc
756                                   : UO_PostInc;
757     return Stmt::UnaryOperatorClass;
758 
759   case OO_MinusMinus:
760     UnaryOp = S->getNumArgs() == 1? UO_PreDec
761                                   : UO_PostDec;
762     return Stmt::UnaryOperatorClass;
763 
764   case OO_Comma:
765     BinaryOp = BO_Comma;
766     return Stmt::BinaryOperatorClass;
767 
768 
769   case OO_ArrowStar:
770     BinaryOp = BO_PtrMemI;
771     return Stmt::BinaryOperatorClass;
772 
773   case OO_Subscript:
774     return Stmt::ArraySubscriptExprClass;
775   }
776 
777   llvm_unreachable("Invalid overloaded operator expression");
778 }
779 
780 
781 void StmtProfiler::VisitCXXOperatorCallExpr(const CXXOperatorCallExpr *S) {
782   if (S->isTypeDependent()) {
783     // Type-dependent operator calls are profiled like their underlying
784     // syntactic operator.
785     UnaryOperatorKind UnaryOp = UO_Extension;
786     BinaryOperatorKind BinaryOp = BO_Comma;
787     Stmt::StmtClass SC = DecodeOperatorCall(S, UnaryOp, BinaryOp);
788 
789     ID.AddInteger(SC);
790     for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
791       Visit(S->getArg(I));
792     if (SC == Stmt::UnaryOperatorClass)
793       ID.AddInteger(UnaryOp);
794     else if (SC == Stmt::BinaryOperatorClass ||
795              SC == Stmt::CompoundAssignOperatorClass)
796       ID.AddInteger(BinaryOp);
797     else
798       assert(SC == Stmt::ArraySubscriptExprClass);
799 
800     return;
801   }
802 
803   VisitCallExpr(S);
804   ID.AddInteger(S->getOperator());
805 }
806 
807 void StmtProfiler::VisitCXXMemberCallExpr(const CXXMemberCallExpr *S) {
808   VisitCallExpr(S);
809 }
810 
811 void StmtProfiler::VisitCUDAKernelCallExpr(const CUDAKernelCallExpr *S) {
812   VisitCallExpr(S);
813 }
814 
815 void StmtProfiler::VisitAsTypeExpr(const AsTypeExpr *S) {
816   VisitExpr(S);
817 }
818 
819 void StmtProfiler::VisitCXXNamedCastExpr(const CXXNamedCastExpr *S) {
820   VisitExplicitCastExpr(S);
821 }
822 
823 void StmtProfiler::VisitCXXStaticCastExpr(const CXXStaticCastExpr *S) {
824   VisitCXXNamedCastExpr(S);
825 }
826 
827 void StmtProfiler::VisitCXXDynamicCastExpr(const CXXDynamicCastExpr *S) {
828   VisitCXXNamedCastExpr(S);
829 }
830 
831 void
832 StmtProfiler::VisitCXXReinterpretCastExpr(const CXXReinterpretCastExpr *S) {
833   VisitCXXNamedCastExpr(S);
834 }
835 
836 void StmtProfiler::VisitCXXConstCastExpr(const CXXConstCastExpr *S) {
837   VisitCXXNamedCastExpr(S);
838 }
839 
840 void StmtProfiler::VisitUserDefinedLiteral(const UserDefinedLiteral *S) {
841   VisitCallExpr(S);
842 }
843 
844 void StmtProfiler::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *S) {
845   VisitExpr(S);
846   ID.AddBoolean(S->getValue());
847 }
848 
849 void StmtProfiler::VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *S) {
850   VisitExpr(S);
851 }
852 
853 void StmtProfiler::VisitCXXStdInitializerListExpr(
854     const CXXStdInitializerListExpr *S) {
855   VisitExpr(S);
856 }
857 
858 void StmtProfiler::VisitCXXTypeidExpr(const CXXTypeidExpr *S) {
859   VisitExpr(S);
860   if (S->isTypeOperand())
861     VisitType(S->getTypeOperandSourceInfo()->getType());
862 }
863 
864 void StmtProfiler::VisitCXXUuidofExpr(const CXXUuidofExpr *S) {
865   VisitExpr(S);
866   if (S->isTypeOperand())
867     VisitType(S->getTypeOperandSourceInfo()->getType());
868 }
869 
870 void StmtProfiler::VisitMSPropertyRefExpr(const MSPropertyRefExpr *S) {
871   VisitExpr(S);
872   VisitDecl(S->getPropertyDecl());
873 }
874 
875 void StmtProfiler::VisitCXXThisExpr(const CXXThisExpr *S) {
876   VisitExpr(S);
877   ID.AddBoolean(S->isImplicit());
878 }
879 
880 void StmtProfiler::VisitCXXThrowExpr(const CXXThrowExpr *S) {
881   VisitExpr(S);
882 }
883 
884 void StmtProfiler::VisitCXXDefaultArgExpr(const CXXDefaultArgExpr *S) {
885   VisitExpr(S);
886   VisitDecl(S->getParam());
887 }
888 
889 void StmtProfiler::VisitCXXDefaultInitExpr(const CXXDefaultInitExpr *S) {
890   VisitExpr(S);
891   VisitDecl(S->getField());
892 }
893 
894 void StmtProfiler::VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *S) {
895   VisitExpr(S);
896   VisitDecl(
897          const_cast<CXXDestructorDecl *>(S->getTemporary()->getDestructor()));
898 }
899 
900 void StmtProfiler::VisitCXXConstructExpr(const CXXConstructExpr *S) {
901   VisitExpr(S);
902   VisitDecl(S->getConstructor());
903   ID.AddBoolean(S->isElidable());
904 }
905 
906 void StmtProfiler::VisitCXXFunctionalCastExpr(const CXXFunctionalCastExpr *S) {
907   VisitExplicitCastExpr(S);
908 }
909 
910 void
911 StmtProfiler::VisitCXXTemporaryObjectExpr(const CXXTemporaryObjectExpr *S) {
912   VisitCXXConstructExpr(S);
913 }
914 
915 void
916 StmtProfiler::VisitLambdaExpr(const LambdaExpr *S) {
917   VisitExpr(S);
918   for (LambdaExpr::capture_iterator C = S->explicit_capture_begin(),
919                                  CEnd = S->explicit_capture_end();
920        C != CEnd; ++C) {
921     ID.AddInteger(C->getCaptureKind());
922     switch (C->getCaptureKind()) {
923     case LCK_This:
924       break;
925     case LCK_ByRef:
926     case LCK_ByCopy:
927       VisitDecl(C->getCapturedVar());
928       ID.AddBoolean(C->isPackExpansion());
929       break;
930     }
931   }
932   // Note: If we actually needed to be able to match lambda
933   // expressions, we would have to consider parameters and return type
934   // here, among other things.
935   VisitStmt(S->getBody());
936 }
937 
938 void
939 StmtProfiler::VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *S) {
940   VisitExpr(S);
941 }
942 
943 void StmtProfiler::VisitCXXDeleteExpr(const CXXDeleteExpr *S) {
944   VisitExpr(S);
945   ID.AddBoolean(S->isGlobalDelete());
946   ID.AddBoolean(S->isArrayForm());
947   VisitDecl(S->getOperatorDelete());
948 }
949 
950 
951 void StmtProfiler::VisitCXXNewExpr(const CXXNewExpr *S) {
952   VisitExpr(S);
953   VisitType(S->getAllocatedType());
954   VisitDecl(S->getOperatorNew());
955   VisitDecl(S->getOperatorDelete());
956   ID.AddBoolean(S->isArray());
957   ID.AddInteger(S->getNumPlacementArgs());
958   ID.AddBoolean(S->isGlobalNew());
959   ID.AddBoolean(S->isParenTypeId());
960   ID.AddInteger(S->getInitializationStyle());
961 }
962 
963 void
964 StmtProfiler::VisitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *S) {
965   VisitExpr(S);
966   ID.AddBoolean(S->isArrow());
967   VisitNestedNameSpecifier(S->getQualifier());
968   ID.AddBoolean(S->getScopeTypeInfo() != nullptr);
969   if (S->getScopeTypeInfo())
970     VisitType(S->getScopeTypeInfo()->getType());
971   ID.AddBoolean(S->getDestroyedTypeInfo() != nullptr);
972   if (S->getDestroyedTypeInfo())
973     VisitType(S->getDestroyedType());
974   else
975     ID.AddPointer(S->getDestroyedTypeIdentifier());
976 }
977 
978 void StmtProfiler::VisitOverloadExpr(const OverloadExpr *S) {
979   VisitExpr(S);
980   VisitNestedNameSpecifier(S->getQualifier());
981   VisitName(S->getName());
982   ID.AddBoolean(S->hasExplicitTemplateArgs());
983   if (S->hasExplicitTemplateArgs())
984     VisitTemplateArguments(S->getExplicitTemplateArgs().getTemplateArgs(),
985                            S->getExplicitTemplateArgs().NumTemplateArgs);
986 }
987 
988 void
989 StmtProfiler::VisitUnresolvedLookupExpr(const UnresolvedLookupExpr *S) {
990   VisitOverloadExpr(S);
991 }
992 
993 void StmtProfiler::VisitTypeTraitExpr(const TypeTraitExpr *S) {
994   VisitExpr(S);
995   ID.AddInteger(S->getTrait());
996   ID.AddInteger(S->getNumArgs());
997   for (unsigned I = 0, N = S->getNumArgs(); I != N; ++I)
998     VisitType(S->getArg(I)->getType());
999 }
1000 
1001 void StmtProfiler::VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *S) {
1002   VisitExpr(S);
1003   ID.AddInteger(S->getTrait());
1004   VisitType(S->getQueriedType());
1005 }
1006 
1007 void StmtProfiler::VisitExpressionTraitExpr(const ExpressionTraitExpr *S) {
1008   VisitExpr(S);
1009   ID.AddInteger(S->getTrait());
1010   VisitExpr(S->getQueriedExpression());
1011 }
1012 
1013 void StmtProfiler::VisitDependentScopeDeclRefExpr(
1014     const DependentScopeDeclRefExpr *S) {
1015   VisitExpr(S);
1016   VisitName(S->getDeclName());
1017   VisitNestedNameSpecifier(S->getQualifier());
1018   ID.AddBoolean(S->hasExplicitTemplateArgs());
1019   if (S->hasExplicitTemplateArgs())
1020     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1021 }
1022 
1023 void StmtProfiler::VisitExprWithCleanups(const ExprWithCleanups *S) {
1024   VisitExpr(S);
1025 }
1026 
1027 void StmtProfiler::VisitCXXUnresolvedConstructExpr(
1028     const CXXUnresolvedConstructExpr *S) {
1029   VisitExpr(S);
1030   VisitType(S->getTypeAsWritten());
1031 }
1032 
1033 void StmtProfiler::VisitCXXDependentScopeMemberExpr(
1034     const CXXDependentScopeMemberExpr *S) {
1035   ID.AddBoolean(S->isImplicitAccess());
1036   if (!S->isImplicitAccess()) {
1037     VisitExpr(S);
1038     ID.AddBoolean(S->isArrow());
1039   }
1040   VisitNestedNameSpecifier(S->getQualifier());
1041   VisitName(S->getMember());
1042   ID.AddBoolean(S->hasExplicitTemplateArgs());
1043   if (S->hasExplicitTemplateArgs())
1044     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1045 }
1046 
1047 void StmtProfiler::VisitUnresolvedMemberExpr(const UnresolvedMemberExpr *S) {
1048   ID.AddBoolean(S->isImplicitAccess());
1049   if (!S->isImplicitAccess()) {
1050     VisitExpr(S);
1051     ID.AddBoolean(S->isArrow());
1052   }
1053   VisitNestedNameSpecifier(S->getQualifier());
1054   VisitName(S->getMemberName());
1055   ID.AddBoolean(S->hasExplicitTemplateArgs());
1056   if (S->hasExplicitTemplateArgs())
1057     VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
1058 }
1059 
1060 void StmtProfiler::VisitCXXNoexceptExpr(const CXXNoexceptExpr *S) {
1061   VisitExpr(S);
1062 }
1063 
1064 void StmtProfiler::VisitPackExpansionExpr(const PackExpansionExpr *S) {
1065   VisitExpr(S);
1066 }
1067 
1068 void StmtProfiler::VisitSizeOfPackExpr(const SizeOfPackExpr *S) {
1069   VisitExpr(S);
1070   VisitDecl(S->getPack());
1071 }
1072 
1073 void StmtProfiler::VisitSubstNonTypeTemplateParmPackExpr(
1074     const SubstNonTypeTemplateParmPackExpr *S) {
1075   VisitExpr(S);
1076   VisitDecl(S->getParameterPack());
1077   VisitTemplateArgument(S->getArgumentPack());
1078 }
1079 
1080 void StmtProfiler::VisitSubstNonTypeTemplateParmExpr(
1081     const SubstNonTypeTemplateParmExpr *E) {
1082   // Profile exactly as the replacement expression.
1083   Visit(E->getReplacement());
1084 }
1085 
1086 void StmtProfiler::VisitFunctionParmPackExpr(const FunctionParmPackExpr *S) {
1087   VisitExpr(S);
1088   VisitDecl(S->getParameterPack());
1089   ID.AddInteger(S->getNumExpansions());
1090   for (FunctionParmPackExpr::iterator I = S->begin(), E = S->end(); I != E; ++I)
1091     VisitDecl(*I);
1092 }
1093 
1094 void StmtProfiler::VisitMaterializeTemporaryExpr(
1095                                            const MaterializeTemporaryExpr *S) {
1096   VisitExpr(S);
1097 }
1098 
1099 void StmtProfiler::VisitOpaqueValueExpr(const OpaqueValueExpr *E) {
1100   VisitExpr(E);
1101 }
1102 
1103 void StmtProfiler::VisitObjCStringLiteral(const ObjCStringLiteral *S) {
1104   VisitExpr(S);
1105 }
1106 
1107 void StmtProfiler::VisitObjCBoxedExpr(const ObjCBoxedExpr *E) {
1108   VisitExpr(E);
1109 }
1110 
1111 void StmtProfiler::VisitObjCArrayLiteral(const ObjCArrayLiteral *E) {
1112   VisitExpr(E);
1113 }
1114 
1115 void StmtProfiler::VisitObjCDictionaryLiteral(const ObjCDictionaryLiteral *E) {
1116   VisitExpr(E);
1117 }
1118 
1119 void StmtProfiler::VisitObjCEncodeExpr(const ObjCEncodeExpr *S) {
1120   VisitExpr(S);
1121   VisitType(S->getEncodedType());
1122 }
1123 
1124 void StmtProfiler::VisitObjCSelectorExpr(const ObjCSelectorExpr *S) {
1125   VisitExpr(S);
1126   VisitName(S->getSelector());
1127 }
1128 
1129 void StmtProfiler::VisitObjCProtocolExpr(const ObjCProtocolExpr *S) {
1130   VisitExpr(S);
1131   VisitDecl(S->getProtocol());
1132 }
1133 
1134 void StmtProfiler::VisitObjCIvarRefExpr(const ObjCIvarRefExpr *S) {
1135   VisitExpr(S);
1136   VisitDecl(S->getDecl());
1137   ID.AddBoolean(S->isArrow());
1138   ID.AddBoolean(S->isFreeIvar());
1139 }
1140 
1141 void StmtProfiler::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *S) {
1142   VisitExpr(S);
1143   if (S->isImplicitProperty()) {
1144     VisitDecl(S->getImplicitPropertyGetter());
1145     VisitDecl(S->getImplicitPropertySetter());
1146   } else {
1147     VisitDecl(S->getExplicitProperty());
1148   }
1149   if (S->isSuperReceiver()) {
1150     ID.AddBoolean(S->isSuperReceiver());
1151     VisitType(S->getSuperReceiverType());
1152   }
1153 }
1154 
1155 void StmtProfiler::VisitObjCSubscriptRefExpr(const ObjCSubscriptRefExpr *S) {
1156   VisitExpr(S);
1157   VisitDecl(S->getAtIndexMethodDecl());
1158   VisitDecl(S->setAtIndexMethodDecl());
1159 }
1160 
1161 void StmtProfiler::VisitObjCMessageExpr(const ObjCMessageExpr *S) {
1162   VisitExpr(S);
1163   VisitName(S->getSelector());
1164   VisitDecl(S->getMethodDecl());
1165 }
1166 
1167 void StmtProfiler::VisitObjCIsaExpr(const ObjCIsaExpr *S) {
1168   VisitExpr(S);
1169   ID.AddBoolean(S->isArrow());
1170 }
1171 
1172 void StmtProfiler::VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *S) {
1173   VisitExpr(S);
1174   ID.AddBoolean(S->getValue());
1175 }
1176 
1177 void StmtProfiler::VisitObjCIndirectCopyRestoreExpr(
1178     const ObjCIndirectCopyRestoreExpr *S) {
1179   VisitExpr(S);
1180   ID.AddBoolean(S->shouldCopy());
1181 }
1182 
1183 void StmtProfiler::VisitObjCBridgedCastExpr(const ObjCBridgedCastExpr *S) {
1184   VisitExplicitCastExpr(S);
1185   ID.AddBoolean(S->getBridgeKind());
1186 }
1187 
1188 void StmtProfiler::VisitDecl(const Decl *D) {
1189   ID.AddInteger(D? D->getKind() : 0);
1190 
1191   if (Canonical && D) {
1192     if (const NonTypeTemplateParmDecl *NTTP =
1193           dyn_cast<NonTypeTemplateParmDecl>(D)) {
1194       ID.AddInteger(NTTP->getDepth());
1195       ID.AddInteger(NTTP->getIndex());
1196       ID.AddBoolean(NTTP->isParameterPack());
1197       VisitType(NTTP->getType());
1198       return;
1199     }
1200 
1201     if (const ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D)) {
1202       // The Itanium C++ ABI uses the type, scope depth, and scope
1203       // index of a parameter when mangling expressions that involve
1204       // function parameters, so we will use the parameter's type for
1205       // establishing function parameter identity. That way, our
1206       // definition of "equivalent" (per C++ [temp.over.link]) is at
1207       // least as strong as the definition of "equivalent" used for
1208       // name mangling.
1209       VisitType(Parm->getType());
1210       ID.AddInteger(Parm->getFunctionScopeDepth());
1211       ID.AddInteger(Parm->getFunctionScopeIndex());
1212       return;
1213     }
1214 
1215     if (const TemplateTypeParmDecl *TTP =
1216           dyn_cast<TemplateTypeParmDecl>(D)) {
1217       ID.AddInteger(TTP->getDepth());
1218       ID.AddInteger(TTP->getIndex());
1219       ID.AddBoolean(TTP->isParameterPack());
1220       return;
1221     }
1222 
1223     if (const TemplateTemplateParmDecl *TTP =
1224           dyn_cast<TemplateTemplateParmDecl>(D)) {
1225       ID.AddInteger(TTP->getDepth());
1226       ID.AddInteger(TTP->getIndex());
1227       ID.AddBoolean(TTP->isParameterPack());
1228       return;
1229     }
1230   }
1231 
1232   ID.AddPointer(D? D->getCanonicalDecl() : nullptr);
1233 }
1234 
1235 void StmtProfiler::VisitType(QualType T) {
1236   if (Canonical)
1237     T = Context.getCanonicalType(T);
1238 
1239   ID.AddPointer(T.getAsOpaquePtr());
1240 }
1241 
1242 void StmtProfiler::VisitName(DeclarationName Name) {
1243   ID.AddPointer(Name.getAsOpaquePtr());
1244 }
1245 
1246 void StmtProfiler::VisitNestedNameSpecifier(NestedNameSpecifier *NNS) {
1247   if (Canonical)
1248     NNS = Context.getCanonicalNestedNameSpecifier(NNS);
1249   ID.AddPointer(NNS);
1250 }
1251 
1252 void StmtProfiler::VisitTemplateName(TemplateName Name) {
1253   if (Canonical)
1254     Name = Context.getCanonicalTemplateName(Name);
1255 
1256   Name.Profile(ID);
1257 }
1258 
1259 void StmtProfiler::VisitTemplateArguments(const TemplateArgumentLoc *Args,
1260                                           unsigned NumArgs) {
1261   ID.AddInteger(NumArgs);
1262   for (unsigned I = 0; I != NumArgs; ++I)
1263     VisitTemplateArgument(Args[I].getArgument());
1264 }
1265 
1266 void StmtProfiler::VisitTemplateArgument(const TemplateArgument &Arg) {
1267   // Mostly repetitive with TemplateArgument::Profile!
1268   ID.AddInteger(Arg.getKind());
1269   switch (Arg.getKind()) {
1270   case TemplateArgument::Null:
1271     break;
1272 
1273   case TemplateArgument::Type:
1274     VisitType(Arg.getAsType());
1275     break;
1276 
1277   case TemplateArgument::Template:
1278   case TemplateArgument::TemplateExpansion:
1279     VisitTemplateName(Arg.getAsTemplateOrTemplatePattern());
1280     break;
1281 
1282   case TemplateArgument::Declaration:
1283     VisitDecl(Arg.getAsDecl());
1284     break;
1285 
1286   case TemplateArgument::NullPtr:
1287     VisitType(Arg.getNullPtrType());
1288     break;
1289 
1290   case TemplateArgument::Integral:
1291     Arg.getAsIntegral().Profile(ID);
1292     VisitType(Arg.getIntegralType());
1293     break;
1294 
1295   case TemplateArgument::Expression:
1296     Visit(Arg.getAsExpr());
1297     break;
1298 
1299   case TemplateArgument::Pack:
1300     const TemplateArgument *Pack = Arg.pack_begin();
1301     for (unsigned i = 0, e = Arg.pack_size(); i != e; ++i)
1302       VisitTemplateArgument(Pack[i]);
1303     break;
1304   }
1305 }
1306 
1307 void Stmt::Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
1308                    bool Canonical) const {
1309   StmtProfiler Profiler(ID, Context, Canonical);
1310   Profiler.Visit(this);
1311 }
1312