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