StmtProfile.cpp revision 8ecdb65716cd7914ffb2eeee993fa9039fcd31e8 
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"
23using namespace clang;
24
25namespace {
26  class StmtProfiler : public StmtVisitor<StmtProfiler> {
27    llvm::FoldingSetNodeID &ID;
28    ASTContext &Context;
29    bool Canonical;
30
31  public:
32    StmtProfiler(llvm::FoldingSetNodeID &ID, ASTContext &Context,
33                 bool Canonical)
34      : ID(ID), Context(Context), Canonical(Canonical) { }
35
36    void VisitStmt(Stmt *S);
37
38#define STMT(Node, Base) void Visit##Node(Node *S);
39#include "clang/AST/StmtNodes.def"
40
41    /// \brief Visit a declaration that is referenced within an expression
42    /// or statement.
43    void VisitDecl(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, unsigned NumArgs);
63
64    /// \brief Visit a single template argument.
65    void VisitTemplateArgument(const TemplateArgument &Arg);
66  };
67}
68
69void StmtProfiler::VisitStmt(Stmt *S) {
70  ID.AddInteger(S->getStmtClass());
71  for (Stmt::child_iterator C = S->child_begin(), CEnd = S->child_end();
72       C != CEnd; ++C)
73    Visit(*C);
74}
75
76void StmtProfiler::VisitDeclStmt(DeclStmt *S) {
77  VisitStmt(S);
78  for (DeclStmt::decl_iterator D = S->decl_begin(), DEnd = S->decl_end();
79       D != DEnd; ++D)
80    VisitDecl(*D);
81}
82
83void StmtProfiler::VisitNullStmt(NullStmt *S) {
84  VisitStmt(S);
85}
86
87void StmtProfiler::VisitCompoundStmt(CompoundStmt *S) {
88  VisitStmt(S);
89}
90
91void StmtProfiler::VisitSwitchCase(SwitchCase *S) {
92  VisitStmt(S);
93}
94
95void StmtProfiler::VisitCaseStmt(CaseStmt *S) {
96  VisitStmt(S);
97}
98
99void StmtProfiler::VisitDefaultStmt(DefaultStmt *S) {
100  VisitStmt(S);
101}
102
103void StmtProfiler::VisitLabelStmt(LabelStmt *S) {
104  VisitStmt(S);
105  VisitName(S->getID());
106}
107
108void StmtProfiler::VisitIfStmt(IfStmt *S) {
109  VisitStmt(S);
110  VisitDecl(S->getConditionVariable());
111}
112
113void StmtProfiler::VisitSwitchStmt(SwitchStmt *S) {
114  VisitStmt(S);
115  VisitDecl(S->getConditionVariable());
116}
117
118void StmtProfiler::VisitWhileStmt(WhileStmt *S) {
119  VisitStmt(S);
120  VisitDecl(S->getConditionVariable());
121}
122
123void StmtProfiler::VisitDoStmt(DoStmt *S) {
124  VisitStmt(S);
125}
126
127void StmtProfiler::VisitForStmt(ForStmt *S) {
128  VisitStmt(S);
129}
130
131void StmtProfiler::VisitGotoStmt(GotoStmt *S) {
132  VisitStmt(S);
133  VisitName(S->getLabel()->getID());
134}
135
136void StmtProfiler::VisitIndirectGotoStmt(IndirectGotoStmt *S) {
137  VisitStmt(S);
138}
139
140void StmtProfiler::VisitContinueStmt(ContinueStmt *S) {
141  VisitStmt(S);
142}
143
144void StmtProfiler::VisitBreakStmt(BreakStmt *S) {
145  VisitStmt(S);
146}
147
148void StmtProfiler::VisitReturnStmt(ReturnStmt *S) {
149  VisitStmt(S);
150}
151
152void StmtProfiler::VisitAsmStmt(AsmStmt *S) {
153  VisitStmt(S);
154  ID.AddBoolean(S->isVolatile());
155  ID.AddBoolean(S->isSimple());
156  VisitStringLiteral(S->getAsmString());
157  ID.AddInteger(S->getNumOutputs());
158  for (unsigned I = 0, N = S->getNumOutputs(); I != N; ++I) {
159    ID.AddString(S->getOutputName(I));
160    VisitStringLiteral(S->getOutputConstraintLiteral(I));
161  }
162  ID.AddInteger(S->getNumInputs());
163  for (unsigned I = 0, N = S->getNumInputs(); I != N; ++I) {
164    ID.AddString(S->getInputName(I));
165    VisitStringLiteral(S->getInputConstraintLiteral(I));
166  }
167  ID.AddInteger(S->getNumClobbers());
168  for (unsigned I = 0, N = S->getNumClobbers(); I != N; ++I)
169    VisitStringLiteral(S->getClobber(I));
170}
171
172void StmtProfiler::VisitCXXCatchStmt(CXXCatchStmt *S) {
173  VisitStmt(S);
174  VisitType(S->getCaughtType());
175}
176
177void StmtProfiler::VisitCXXTryStmt(CXXTryStmt *S) {
178  VisitStmt(S);
179}
180
181void StmtProfiler::VisitObjCForCollectionStmt(ObjCForCollectionStmt *S) {
182  VisitStmt(S);
183}
184
185void StmtProfiler::VisitObjCAtCatchStmt(ObjCAtCatchStmt *S) {
186  VisitStmt(S);
187  ID.AddBoolean(S->hasEllipsis());
188  if (S->getCatchParamDecl())
189    VisitType(S->getCatchParamDecl()->getType());
190}
191
192void StmtProfiler::VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *S) {
193  VisitStmt(S);
194}
195
196void StmtProfiler::VisitObjCAtTryStmt(ObjCAtTryStmt *S) {
197  VisitStmt(S);
198}
199
200void StmtProfiler::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
201  VisitStmt(S);
202}
203
204void StmtProfiler::VisitObjCAtThrowStmt(ObjCAtThrowStmt *S) {
205  VisitStmt(S);
206}
207
208void StmtProfiler::VisitExpr(Expr *S) {
209  VisitStmt(S);
210}
211
212void StmtProfiler::VisitDeclRefExpr(DeclRefExpr *S) {
213  VisitExpr(S);
214  VisitNestedNameSpecifier(S->getQualifier());
215  VisitDecl(S->getDecl());
216  VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
217}
218
219void StmtProfiler::VisitPredefinedExpr(PredefinedExpr *S) {
220  VisitExpr(S);
221  ID.AddInteger(S->getIdentType());
222}
223
224void StmtProfiler::VisitIntegerLiteral(IntegerLiteral *S) {
225  VisitExpr(S);
226  S->getValue().Profile(ID);
227}
228
229void StmtProfiler::VisitCharacterLiteral(CharacterLiteral *S) {
230  VisitExpr(S);
231  ID.AddBoolean(S->isWide());
232  ID.AddInteger(S->getValue());
233}
234
235void StmtProfiler::VisitFloatingLiteral(FloatingLiteral *S) {
236  VisitExpr(S);
237  S->getValue().Profile(ID);
238  ID.AddBoolean(S->isExact());
239}
240
241void StmtProfiler::VisitImaginaryLiteral(ImaginaryLiteral *S) {
242  VisitExpr(S);
243}
244
245void StmtProfiler::VisitStringLiteral(StringLiteral *S) {
246  VisitExpr(S);
247  ID.AddString(S->getString());
248  ID.AddBoolean(S->isWide());
249}
250
251void StmtProfiler::VisitParenExpr(ParenExpr *S) {
252  VisitExpr(S);
253}
254
255void StmtProfiler::VisitParenListExpr(ParenListExpr *S) {
256  VisitExpr(S);
257}
258
259void StmtProfiler::VisitUnaryOperator(UnaryOperator *S) {
260  VisitExpr(S);
261  ID.AddInteger(S->getOpcode());
262}
263
264void StmtProfiler::VisitOffsetOfExpr(OffsetOfExpr *S) {
265  VisitType(S->getTypeSourceInfo()->getType());
266  unsigned n = S->getNumComponents();
267  for (unsigned i = 0; i < n; ++i) {
268    const OffsetOfExpr::OffsetOfNode& ON = S->getComponent(i);
269    ID.AddInteger(ON.getKind());
270    switch (ON.getKind()) {
271    case OffsetOfExpr::OffsetOfNode::Array:
272      // Expressions handled below.
273      break;
274
275    case OffsetOfExpr::OffsetOfNode::Field:
276      VisitDecl(ON.getField());
277      break;
278
279    case OffsetOfExpr::OffsetOfNode::Identifier:
280      ID.AddPointer(ON.getFieldName());
281      break;
282    }
283  }
284
285  VisitExpr(S);
286}
287
288void StmtProfiler::VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *S) {
289  VisitExpr(S);
290  ID.AddBoolean(S->isSizeOf());
291  if (S->isArgumentType())
292    VisitType(S->getArgumentType());
293}
294
295void StmtProfiler::VisitArraySubscriptExpr(ArraySubscriptExpr *S) {
296  VisitExpr(S);
297}
298
299void StmtProfiler::VisitCallExpr(CallExpr *S) {
300  VisitExpr(S);
301}
302
303void StmtProfiler::VisitMemberExpr(MemberExpr *S) {
304  VisitExpr(S);
305  VisitDecl(S->getMemberDecl());
306  VisitNestedNameSpecifier(S->getQualifier());
307  ID.AddBoolean(S->isArrow());
308}
309
310void StmtProfiler::VisitCompoundLiteralExpr(CompoundLiteralExpr *S) {
311  VisitExpr(S);
312  ID.AddBoolean(S->isFileScope());
313}
314
315void StmtProfiler::VisitCastExpr(CastExpr *S) {
316  VisitExpr(S);
317}
318
319void StmtProfiler::VisitImplicitCastExpr(ImplicitCastExpr *S) {
320  VisitCastExpr(S);
321  ID.AddBoolean(S->isLvalueCast());
322}
323
324void StmtProfiler::VisitExplicitCastExpr(ExplicitCastExpr *S) {
325  VisitCastExpr(S);
326  VisitType(S->getTypeAsWritten());
327}
328
329void StmtProfiler::VisitCStyleCastExpr(CStyleCastExpr *S) {
330  VisitExplicitCastExpr(S);
331}
332
333void StmtProfiler::VisitBinaryOperator(BinaryOperator *S) {
334  VisitExpr(S);
335  ID.AddInteger(S->getOpcode());
336}
337
338void StmtProfiler::VisitCompoundAssignOperator(CompoundAssignOperator *S) {
339  VisitBinaryOperator(S);
340}
341
342void StmtProfiler::VisitConditionalOperator(ConditionalOperator *S) {
343  VisitExpr(S);
344}
345
346void StmtProfiler::VisitAddrLabelExpr(AddrLabelExpr *S) {
347  VisitExpr(S);
348  VisitName(S->getLabel()->getID());
349}
350
351void StmtProfiler::VisitStmtExpr(StmtExpr *S) {
352  VisitExpr(S);
353}
354
355void StmtProfiler::VisitTypesCompatibleExpr(TypesCompatibleExpr *S) {
356  VisitExpr(S);
357  VisitType(S->getArgType1());
358  VisitType(S->getArgType2());
359}
360
361void StmtProfiler::VisitShuffleVectorExpr(ShuffleVectorExpr *S) {
362  VisitExpr(S);
363}
364
365void StmtProfiler::VisitChooseExpr(ChooseExpr *S) {
366  VisitExpr(S);
367}
368
369void StmtProfiler::VisitGNUNullExpr(GNUNullExpr *S) {
370  VisitExpr(S);
371}
372
373void StmtProfiler::VisitVAArgExpr(VAArgExpr *S) {
374  VisitExpr(S);
375}
376
377void StmtProfiler::VisitInitListExpr(InitListExpr *S) {
378  if (S->getSyntacticForm()) {
379    VisitInitListExpr(S->getSyntacticForm());
380    return;
381  }
382
383  VisitExpr(S);
384}
385
386void StmtProfiler::VisitDesignatedInitExpr(DesignatedInitExpr *S) {
387  VisitExpr(S);
388  ID.AddBoolean(S->usesGNUSyntax());
389  for (DesignatedInitExpr::designators_iterator D = S->designators_begin(),
390                                             DEnd = S->designators_end();
391       D != DEnd; ++D) {
392    if (D->isFieldDesignator()) {
393      ID.AddInteger(0);
394      VisitName(D->getFieldName());
395      continue;
396    }
397
398    if (D->isArrayDesignator()) {
399      ID.AddInteger(1);
400    } else {
401      assert(D->isArrayRangeDesignator());
402      ID.AddInteger(2);
403    }
404    ID.AddInteger(D->getFirstExprIndex());
405  }
406}
407
408void StmtProfiler::VisitImplicitValueInitExpr(ImplicitValueInitExpr *S) {
409  VisitExpr(S);
410}
411
412void StmtProfiler::VisitExtVectorElementExpr(ExtVectorElementExpr *S) {
413  VisitExpr(S);
414  VisitName(&S->getAccessor());
415}
416
417void StmtProfiler::VisitBlockExpr(BlockExpr *S) {
418  VisitExpr(S);
419  VisitDecl(S->getBlockDecl());
420}
421
422void StmtProfiler::VisitBlockDeclRefExpr(BlockDeclRefExpr *S) {
423  VisitExpr(S);
424  VisitDecl(S->getDecl());
425  ID.AddBoolean(S->isByRef());
426  ID.AddBoolean(S->isConstQualAdded());
427}
428
429void StmtProfiler::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *S) {
430  VisitCallExpr(S);
431  ID.AddInteger(S->getOperator());
432}
433
434void StmtProfiler::VisitCXXMemberCallExpr(CXXMemberCallExpr *S) {
435  VisitCallExpr(S);
436}
437
438void StmtProfiler::VisitCXXNamedCastExpr(CXXNamedCastExpr *S) {
439  VisitExplicitCastExpr(S);
440}
441
442void StmtProfiler::VisitCXXStaticCastExpr(CXXStaticCastExpr *S) {
443  VisitCXXNamedCastExpr(S);
444}
445
446void StmtProfiler::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *S) {
447  VisitCXXNamedCastExpr(S);
448}
449
450void StmtProfiler::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *S) {
451  VisitCXXNamedCastExpr(S);
452}
453
454void StmtProfiler::VisitCXXConstCastExpr(CXXConstCastExpr *S) {
455  VisitCXXNamedCastExpr(S);
456}
457
458void StmtProfiler::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *S) {
459  VisitExpr(S);
460  ID.AddBoolean(S->getValue());
461}
462
463void StmtProfiler::VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *S) {
464  VisitExpr(S);
465}
466
467void StmtProfiler::VisitCXXTypeidExpr(CXXTypeidExpr *S) {
468  VisitExpr(S);
469  if (S->isTypeOperand())
470    VisitType(S->getTypeOperand());
471}
472
473void StmtProfiler::VisitCXXThisExpr(CXXThisExpr *S) {
474  VisitExpr(S);
475}
476
477void StmtProfiler::VisitCXXThrowExpr(CXXThrowExpr *S) {
478  VisitExpr(S);
479}
480
481void StmtProfiler::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *S) {
482  VisitExpr(S);
483  VisitDecl(S->getParam());
484}
485
486void StmtProfiler::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *S) {
487  VisitExpr(S);
488  VisitDecl(
489         const_cast<CXXDestructorDecl *>(S->getTemporary()->getDestructor()));
490}
491
492void StmtProfiler::VisitCXXBindReferenceExpr(CXXBindReferenceExpr *S) {
493  VisitExpr(S);
494}
495
496void StmtProfiler::VisitCXXConstructExpr(CXXConstructExpr *S) {
497  VisitExpr(S);
498  VisitDecl(S->getConstructor());
499  ID.AddBoolean(S->isElidable());
500}
501
502void StmtProfiler::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *S) {
503  VisitExplicitCastExpr(S);
504}
505
506void StmtProfiler::VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *S) {
507  VisitCXXConstructExpr(S);
508}
509
510void StmtProfiler::VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *S) {
511  VisitExpr(S);
512}
513
514void StmtProfiler::VisitCXXDeleteExpr(CXXDeleteExpr *S) {
515  VisitExpr(S);
516  ID.AddBoolean(S->isGlobalDelete());
517  ID.AddBoolean(S->isArrayForm());
518  VisitDecl(S->getOperatorDelete());
519}
520
521
522void StmtProfiler::VisitCXXNewExpr(CXXNewExpr *S) {
523  VisitExpr(S);
524  VisitType(S->getAllocatedType());
525  VisitDecl(S->getOperatorNew());
526  VisitDecl(S->getOperatorDelete());
527  VisitDecl(S->getConstructor());
528  ID.AddBoolean(S->isArray());
529  ID.AddInteger(S->getNumPlacementArgs());
530  ID.AddBoolean(S->isGlobalNew());
531  ID.AddBoolean(S->isParenTypeId());
532  ID.AddBoolean(S->hasInitializer());
533  ID.AddInteger(S->getNumConstructorArgs());
534}
535
536void StmtProfiler::VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *S) {
537  VisitExpr(S);
538  ID.AddBoolean(S->isArrow());
539  VisitNestedNameSpecifier(S->getQualifier());
540  VisitType(S->getDestroyedType());
541}
542
543void
544StmtProfiler::VisitUnresolvedLookupExpr(UnresolvedLookupExpr *S) {
545  VisitExpr(S);
546  VisitNestedNameSpecifier(S->getQualifier());
547  VisitName(S->getName());
548  ID.AddBoolean(S->hasExplicitTemplateArgs());
549  if (S->hasExplicitTemplateArgs())
550    VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
551}
552
553void StmtProfiler::VisitUnaryTypeTraitExpr(UnaryTypeTraitExpr *S) {
554  VisitExpr(S);
555  ID.AddInteger(S->getTrait());
556  VisitType(S->getQueriedType());
557}
558
559void
560StmtProfiler::VisitDependentScopeDeclRefExpr(DependentScopeDeclRefExpr *S) {
561  VisitExpr(S);
562  VisitName(S->getDeclName());
563  VisitNestedNameSpecifier(S->getQualifier());
564  ID.AddBoolean(S->hasExplicitTemplateArgs());
565  if (S->hasExplicitTemplateArgs())
566    VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
567}
568
569void StmtProfiler::VisitCXXExprWithTemporaries(CXXExprWithTemporaries *S) {
570  VisitExpr(S);
571  for (unsigned I = 0, N = S->getNumTemporaries(); I != N; ++I)
572    VisitDecl(
573      const_cast<CXXDestructorDecl *>(S->getTemporary(I)->getDestructor()));
574}
575
576void
577StmtProfiler::VisitCXXUnresolvedConstructExpr(CXXUnresolvedConstructExpr *S) {
578  VisitExpr(S);
579  VisitType(S->getTypeAsWritten());
580}
581
582void
583StmtProfiler::VisitCXXDependentScopeMemberExpr(CXXDependentScopeMemberExpr *S) {
584  ID.AddBoolean(S->isImplicitAccess());
585  if (!S->isImplicitAccess()) {
586    VisitExpr(S);
587    ID.AddBoolean(S->isArrow());
588  }
589  VisitNestedNameSpecifier(S->getQualifier());
590  VisitName(S->getMember());
591  ID.AddBoolean(S->hasExplicitTemplateArgs());
592  if (S->hasExplicitTemplateArgs())
593    VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
594}
595
596void StmtProfiler::VisitUnresolvedMemberExpr(UnresolvedMemberExpr *S) {
597  ID.AddBoolean(S->isImplicitAccess());
598  if (!S->isImplicitAccess()) {
599    VisitExpr(S);
600    ID.AddBoolean(S->isArrow());
601  }
602  VisitNestedNameSpecifier(S->getQualifier());
603  VisitName(S->getMemberName());
604  ID.AddBoolean(S->hasExplicitTemplateArgs());
605  if (S->hasExplicitTemplateArgs())
606    VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
607}
608
609void StmtProfiler::VisitObjCStringLiteral(ObjCStringLiteral *S) {
610  VisitExpr(S);
611}
612
613void StmtProfiler::VisitObjCEncodeExpr(ObjCEncodeExpr *S) {
614  VisitExpr(S);
615  VisitType(S->getEncodedType());
616}
617
618void StmtProfiler::VisitObjCSelectorExpr(ObjCSelectorExpr *S) {
619  VisitExpr(S);
620  VisitName(S->getSelector());
621}
622
623void StmtProfiler::VisitObjCProtocolExpr(ObjCProtocolExpr *S) {
624  VisitExpr(S);
625  VisitDecl(S->getProtocol());
626}
627
628void StmtProfiler::VisitObjCIvarRefExpr(ObjCIvarRefExpr *S) {
629  VisitExpr(S);
630  VisitDecl(S->getDecl());
631  ID.AddBoolean(S->isArrow());
632  ID.AddBoolean(S->isFreeIvar());
633}
634
635void StmtProfiler::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *S) {
636  VisitExpr(S);
637  VisitDecl(S->getProperty());
638}
639
640void StmtProfiler::VisitObjCImplicitSetterGetterRefExpr(
641                                  ObjCImplicitSetterGetterRefExpr *S) {
642  VisitExpr(S);
643  VisitDecl(S->getGetterMethod());
644  VisitDecl(S->getSetterMethod());
645  VisitDecl(S->getInterfaceDecl());
646}
647
648void StmtProfiler::VisitObjCMessageExpr(ObjCMessageExpr *S) {
649  VisitExpr(S);
650  VisitName(S->getSelector());
651  VisitDecl(S->getMethodDecl());
652}
653
654void StmtProfiler::VisitObjCSuperExpr(ObjCSuperExpr *S) {
655  VisitExpr(S);
656}
657
658void StmtProfiler::VisitObjCIsaExpr(ObjCIsaExpr *S) {
659  VisitExpr(S);
660  ID.AddBoolean(S->isArrow());
661}
662
663void StmtProfiler::VisitDecl(Decl *D) {
664  ID.AddInteger(D? D->getKind() : 0);
665
666  if (Canonical && D) {
667    if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(D)) {
668      ID.AddInteger(NTTP->getDepth());
669      ID.AddInteger(NTTP->getIndex());
670      VisitType(NTTP->getType());
671      return;
672    }
673
674    if (ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(D)) {
675      // The Itanium C++ ABI uses the type of a parameter when mangling
676      // expressions that involve function parameters, so we will use the
677      // parameter's type for establishing function parameter identity. That
678      // way, our definition of "equivalent" (per C++ [temp.over.link])
679      // matches the definition of "equivalent" used for name mangling.
680      VisitType(Parm->getType());
681      return;
682    }
683
684    if (TemplateTemplateParmDecl *TTP = dyn_cast<TemplateTemplateParmDecl>(D)) {
685      ID.AddInteger(TTP->getDepth());
686      ID.AddInteger(TTP->getIndex());
687      return;
688    }
689  }
690
691  ID.AddPointer(D? D->getCanonicalDecl() : 0);
692}
693
694void StmtProfiler::VisitType(QualType T) {
695  if (Canonical)
696    T = Context.getCanonicalType(T);
697
698  ID.AddPointer(T.getAsOpaquePtr());
699}
700
701void StmtProfiler::VisitName(DeclarationName Name) {
702  ID.AddPointer(Name.getAsOpaquePtr());
703}
704
705void StmtProfiler::VisitNestedNameSpecifier(NestedNameSpecifier *NNS) {
706  if (Canonical)
707    NNS = Context.getCanonicalNestedNameSpecifier(NNS);
708  ID.AddPointer(NNS);
709}
710
711void StmtProfiler::VisitTemplateName(TemplateName Name) {
712  if (Canonical)
713    Name = Context.getCanonicalTemplateName(Name);
714
715  Name.Profile(ID);
716}
717
718void StmtProfiler::VisitTemplateArguments(const TemplateArgumentLoc *Args,
719                                          unsigned NumArgs) {
720  ID.AddInteger(NumArgs);
721  for (unsigned I = 0; I != NumArgs; ++I)
722    VisitTemplateArgument(Args[I].getArgument());
723}
724
725void StmtProfiler::VisitTemplateArgument(const TemplateArgument &Arg) {
726  // Mostly repetitive with TemplateArgument::Profile!
727  ID.AddInteger(Arg.getKind());
728  switch (Arg.getKind()) {
729  case TemplateArgument::Null:
730    break;
731
732  case TemplateArgument::Type:
733    VisitType(Arg.getAsType());
734    break;
735
736  case TemplateArgument::Template:
737    VisitTemplateName(Arg.getAsTemplate());
738    break;
739
740  case TemplateArgument::Declaration:
741    VisitDecl(Arg.getAsDecl());
742    break;
743
744  case TemplateArgument::Integral:
745    Arg.getAsIntegral()->Profile(ID);
746    VisitType(Arg.getIntegralType());
747    break;
748
749  case TemplateArgument::Expression:
750    Visit(Arg.getAsExpr());
751    break;
752
753  case TemplateArgument::Pack:
754    const TemplateArgument *Pack = Arg.pack_begin();
755    for (unsigned i = 0, e = Arg.pack_size(); i != e; ++i)
756      VisitTemplateArgument(Pack[i]);
757    break;
758  }
759}
760
761void Stmt::Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context,
762                   bool Canonical) {
763  StmtProfiler Profiler(ID, Context, Canonical);
764  Profiler.Visit(this);
765}
766