xref: /llvm-project/clang/lib/AST/APValue.cpp (revision 9670f847b8c5f6eb42c3df74035809f95465b5fb) 
1 //===--- APValue.cpp - Union class for APFloat/APSInt/Complex -------------===//
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 APValue class.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "clang/AST/APValue.h"
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/CharUnits.h"
17 #include "clang/AST/DeclCXX.h"
18 #include "clang/AST/Expr.h"
19 #include "clang/AST/Type.h"
20 #include "llvm/Support/ErrorHandling.h"
21 #include "llvm/Support/raw_ostream.h"
22 using namespace clang;
23 
24 namespace {
25   struct LVBase {
26     llvm::PointerIntPair<APValue::LValueBase, 1, bool> BaseAndIsOnePastTheEnd;
27     CharUnits Offset;
28     unsigned PathLength;
29     unsigned CallIndex;
30   };
31 }
32 
33 struct APValue::LV : LVBase {
34   static const unsigned InlinePathSpace =
35       (DataSize - sizeof(LVBase)) / sizeof(LValuePathEntry);
36 
37   /// Path - The sequence of base classes, fields and array indices to follow to
38   /// walk from Base to the subobject. When performing GCC-style folding, there
39   /// may not be such a path.
40   union {
41     LValuePathEntry Path[InlinePathSpace];
42     LValuePathEntry *PathPtr;
43   };
44 
45   LV() { PathLength = (unsigned)-1; }
46   ~LV() { resizePath(0); }
47 
48   void resizePath(unsigned Length) {
49     if (Length == PathLength)
50       return;
51     if (hasPathPtr())
52       delete [] PathPtr;
53     PathLength = Length;
54     if (hasPathPtr())
55       PathPtr = new LValuePathEntry[Length];
56   }
57 
58   bool hasPath() const { return PathLength != (unsigned)-1; }
59   bool hasPathPtr() const { return hasPath() && PathLength > InlinePathSpace; }
60 
61   LValuePathEntry *getPath() { return hasPathPtr() ? PathPtr : Path; }
62   const LValuePathEntry *getPath() const {
63     return hasPathPtr() ? PathPtr : Path;
64   }
65 };
66 
67 namespace {
68   struct MemberPointerBase {
69     llvm::PointerIntPair<const ValueDecl*, 1, bool> MemberAndIsDerivedMember;
70     unsigned PathLength;
71   };
72 }
73 
74 struct APValue::MemberPointerData : MemberPointerBase {
75   static const unsigned InlinePathSpace =
76       (DataSize - sizeof(MemberPointerBase)) / sizeof(const CXXRecordDecl*);
77   typedef const CXXRecordDecl *PathElem;
78   union {
79     PathElem Path[InlinePathSpace];
80     PathElem *PathPtr;
81   };
82 
83   MemberPointerData() { PathLength = 0; }
84   ~MemberPointerData() { resizePath(0); }
85 
86   void resizePath(unsigned Length) {
87     if (Length == PathLength)
88       return;
89     if (hasPathPtr())
90       delete [] PathPtr;
91     PathLength = Length;
92     if (hasPathPtr())
93       PathPtr = new PathElem[Length];
94   }
95 
96   bool hasPathPtr() const { return PathLength > InlinePathSpace; }
97 
98   PathElem *getPath() { return hasPathPtr() ? PathPtr : Path; }
99   const PathElem *getPath() const {
100     return hasPathPtr() ? PathPtr : Path;
101   }
102 };
103 
104 // FIXME: Reduce the malloc traffic here.
105 
106 APValue::Arr::Arr(unsigned NumElts, unsigned Size) :
107   Elts(new APValue[NumElts + (NumElts != Size ? 1 : 0)]),
108   NumElts(NumElts), ArrSize(Size) {}
109 APValue::Arr::~Arr() { delete [] Elts; }
110 
111 APValue::StructData::StructData(unsigned NumBases, unsigned NumFields) :
112   Elts(new APValue[NumBases+NumFields]),
113   NumBases(NumBases), NumFields(NumFields) {}
114 APValue::StructData::~StructData() {
115   delete [] Elts;
116 }
117 
118 APValue::UnionData::UnionData() : Field(nullptr), Value(new APValue) {}
119 APValue::UnionData::~UnionData () {
120   delete Value;
121 }
122 
123 APValue::APValue(const APValue &RHS) : Kind(Uninitialized) {
124   switch (RHS.getKind()) {
125   case Uninitialized:
126     break;
127   case Int:
128     MakeInt();
129     setInt(RHS.getInt());
130     break;
131   case Float:
132     MakeFloat();
133     setFloat(RHS.getFloat());
134     break;
135   case Vector:
136     MakeVector();
137     setVector(((const Vec *)(const char *)RHS.Data.buffer)->Elts,
138               RHS.getVectorLength());
139     break;
140   case ComplexInt:
141     MakeComplexInt();
142     setComplexInt(RHS.getComplexIntReal(), RHS.getComplexIntImag());
143     break;
144   case ComplexFloat:
145     MakeComplexFloat();
146     setComplexFloat(RHS.getComplexFloatReal(), RHS.getComplexFloatImag());
147     break;
148   case LValue:
149     MakeLValue();
150     if (RHS.hasLValuePath())
151       setLValue(RHS.getLValueBase(), RHS.getLValueOffset(), RHS.getLValuePath(),
152                 RHS.isLValueOnePastTheEnd(), RHS.getLValueCallIndex());
153     else
154       setLValue(RHS.getLValueBase(), RHS.getLValueOffset(), NoLValuePath(),
155                 RHS.getLValueCallIndex());
156     break;
157   case Array:
158     MakeArray(RHS.getArrayInitializedElts(), RHS.getArraySize());
159     for (unsigned I = 0, N = RHS.getArrayInitializedElts(); I != N; ++I)
160       getArrayInitializedElt(I) = RHS.getArrayInitializedElt(I);
161     if (RHS.hasArrayFiller())
162       getArrayFiller() = RHS.getArrayFiller();
163     break;
164   case Struct:
165     MakeStruct(RHS.getStructNumBases(), RHS.getStructNumFields());
166     for (unsigned I = 0, N = RHS.getStructNumBases(); I != N; ++I)
167       getStructBase(I) = RHS.getStructBase(I);
168     for (unsigned I = 0, N = RHS.getStructNumFields(); I != N; ++I)
169       getStructField(I) = RHS.getStructField(I);
170     break;
171   case Union:
172     MakeUnion();
173     setUnion(RHS.getUnionField(), RHS.getUnionValue());
174     break;
175   case MemberPointer:
176     MakeMemberPointer(RHS.getMemberPointerDecl(),
177                       RHS.isMemberPointerToDerivedMember(),
178                       RHS.getMemberPointerPath());
179     break;
180   case AddrLabelDiff:
181     MakeAddrLabelDiff();
182     setAddrLabelDiff(RHS.getAddrLabelDiffLHS(), RHS.getAddrLabelDiffRHS());
183     break;
184   }
185 }
186 
187 void APValue::DestroyDataAndMakeUninit() {
188   if (Kind == Int)
189     ((APSInt*)(char*)Data.buffer)->~APSInt();
190   else if (Kind == Float)
191     ((APFloat*)(char*)Data.buffer)->~APFloat();
192   else if (Kind == Vector)
193     ((Vec*)(char*)Data.buffer)->~Vec();
194   else if (Kind == ComplexInt)
195     ((ComplexAPSInt*)(char*)Data.buffer)->~ComplexAPSInt();
196   else if (Kind == ComplexFloat)
197     ((ComplexAPFloat*)(char*)Data.buffer)->~ComplexAPFloat();
198   else if (Kind == LValue)
199     ((LV*)(char*)Data.buffer)->~LV();
200   else if (Kind == Array)
201     ((Arr*)(char*)Data.buffer)->~Arr();
202   else if (Kind == Struct)
203     ((StructData*)(char*)Data.buffer)->~StructData();
204   else if (Kind == Union)
205     ((UnionData*)(char*)Data.buffer)->~UnionData();
206   else if (Kind == MemberPointer)
207     ((MemberPointerData*)(char*)Data.buffer)->~MemberPointerData();
208   else if (Kind == AddrLabelDiff)
209     ((AddrLabelDiffData*)(char*)Data.buffer)->~AddrLabelDiffData();
210   Kind = Uninitialized;
211 }
212 
213 bool APValue::needsCleanup() const {
214   switch (getKind()) {
215   case Uninitialized:
216   case AddrLabelDiff:
217     return false;
218   case Struct:
219   case Union:
220   case Array:
221   case Vector:
222     return true;
223   case Int:
224     return getInt().needsCleanup();
225   case Float:
226     return getFloat().needsCleanup();
227   case ComplexFloat:
228     assert(getComplexFloatImag().needsCleanup() ==
229                getComplexFloatReal().needsCleanup() &&
230            "In _Complex float types, real and imaginary values always have the "
231            "same size.");
232     return getComplexFloatReal().needsCleanup();
233   case ComplexInt:
234     assert(getComplexIntImag().needsCleanup() ==
235                getComplexIntReal().needsCleanup() &&
236            "In _Complex int types, real and imaginary values must have the "
237            "same size.");
238     return getComplexIntReal().needsCleanup();
239   case LValue:
240     return reinterpret_cast<const LV *>(Data.buffer)->hasPathPtr();
241   case MemberPointer:
242     return reinterpret_cast<const MemberPointerData *>(Data.buffer)
243         ->hasPathPtr();
244   }
245   llvm_unreachable("Unknown APValue kind!");
246 }
247 
248 void APValue::swap(APValue &RHS) {
249   std::swap(Kind, RHS.Kind);
250   char TmpData[DataSize];
251   memcpy(TmpData, Data.buffer, DataSize);
252   memcpy(Data.buffer, RHS.Data.buffer, DataSize);
253   memcpy(RHS.Data.buffer, TmpData, DataSize);
254 }
255 
256 LLVM_DUMP_METHOD void APValue::dump() const {
257   dump(llvm::errs());
258   llvm::errs() << '\n';
259 }
260 
261 static double GetApproxValue(const llvm::APFloat &F) {
262   llvm::APFloat V = F;
263   bool ignored;
264   V.convert(llvm::APFloat::IEEEdouble, llvm::APFloat::rmNearestTiesToEven,
265             &ignored);
266   return V.convertToDouble();
267 }
268 
269 void APValue::dump(raw_ostream &OS) const {
270   switch (getKind()) {
271   case Uninitialized:
272     OS << "Uninitialized";
273     return;
274   case Int:
275     OS << "Int: " << getInt();
276     return;
277   case Float:
278     OS << "Float: " << GetApproxValue(getFloat());
279     return;
280   case Vector:
281     OS << "Vector: ";
282     getVectorElt(0).dump(OS);
283     for (unsigned i = 1; i != getVectorLength(); ++i) {
284       OS << ", ";
285       getVectorElt(i).dump(OS);
286     }
287     return;
288   case ComplexInt:
289     OS << "ComplexInt: " << getComplexIntReal() << ", " << getComplexIntImag();
290     return;
291   case ComplexFloat:
292     OS << "ComplexFloat: " << GetApproxValue(getComplexFloatReal())
293        << ", " << GetApproxValue(getComplexFloatImag());
294     return;
295   case LValue:
296     OS << "LValue: <todo>";
297     return;
298   case Array:
299     OS << "Array: ";
300     for (unsigned I = 0, N = getArrayInitializedElts(); I != N; ++I) {
301       getArrayInitializedElt(I).dump(OS);
302       if (I != getArraySize() - 1) OS << ", ";
303     }
304     if (hasArrayFiller()) {
305       OS << getArraySize() - getArrayInitializedElts() << " x ";
306       getArrayFiller().dump(OS);
307     }
308     return;
309   case Struct:
310     OS << "Struct ";
311     if (unsigned N = getStructNumBases()) {
312       OS << " bases: ";
313       getStructBase(0).dump(OS);
314       for (unsigned I = 1; I != N; ++I) {
315         OS << ", ";
316         getStructBase(I).dump(OS);
317       }
318     }
319     if (unsigned N = getStructNumFields()) {
320       OS << " fields: ";
321       getStructField(0).dump(OS);
322       for (unsigned I = 1; I != N; ++I) {
323         OS << ", ";
324         getStructField(I).dump(OS);
325       }
326     }
327     return;
328   case Union:
329     OS << "Union: ";
330     getUnionValue().dump(OS);
331     return;
332   case MemberPointer:
333     OS << "MemberPointer: <todo>";
334     return;
335   case AddrLabelDiff:
336     OS << "AddrLabelDiff: <todo>";
337     return;
338   }
339   llvm_unreachable("Unknown APValue kind!");
340 }
341 
342 void APValue::printPretty(raw_ostream &Out, ASTContext &Ctx, QualType Ty) const{
343   switch (getKind()) {
344   case APValue::Uninitialized:
345     Out << "<uninitialized>";
346     return;
347   case APValue::Int:
348     if (Ty->isBooleanType())
349       Out << (getInt().getBoolValue() ? "true" : "false");
350     else
351       Out << getInt();
352     return;
353   case APValue::Float:
354     Out << GetApproxValue(getFloat());
355     return;
356   case APValue::Vector: {
357     Out << '{';
358     QualType ElemTy = Ty->getAs<VectorType>()->getElementType();
359     getVectorElt(0).printPretty(Out, Ctx, ElemTy);
360     for (unsigned i = 1; i != getVectorLength(); ++i) {
361       Out << ", ";
362       getVectorElt(i).printPretty(Out, Ctx, ElemTy);
363     }
364     Out << '}';
365     return;
366   }
367   case APValue::ComplexInt:
368     Out << getComplexIntReal() << "+" << getComplexIntImag() << "i";
369     return;
370   case APValue::ComplexFloat:
371     Out << GetApproxValue(getComplexFloatReal()) << "+"
372         << GetApproxValue(getComplexFloatImag()) << "i";
373     return;
374   case APValue::LValue: {
375     LValueBase Base = getLValueBase();
376     if (!Base) {
377       Out << "0";
378       return;
379     }
380 
381     bool IsReference = Ty->isReferenceType();
382     QualType InnerTy
383       = IsReference ? Ty.getNonReferenceType() : Ty->getPointeeType();
384     if (InnerTy.isNull())
385       InnerTy = Ty;
386 
387     if (!hasLValuePath()) {
388       // No lvalue path: just print the offset.
389       CharUnits O = getLValueOffset();
390       CharUnits S = Ctx.getTypeSizeInChars(InnerTy);
391       if (!O.isZero()) {
392         if (IsReference)
393           Out << "*(";
394         if (O % S) {
395           Out << "(char*)";
396           S = CharUnits::One();
397         }
398         Out << '&';
399       } else if (!IsReference)
400         Out << '&';
401 
402       if (const ValueDecl *VD = Base.dyn_cast<const ValueDecl*>())
403         Out << *VD;
404       else {
405         assert(Base.get<const Expr *>() != nullptr &&
406                "Expecting non-null Expr");
407         Base.get<const Expr*>()->printPretty(Out, nullptr,
408                                              Ctx.getPrintingPolicy());
409       }
410 
411       if (!O.isZero()) {
412         Out << " + " << (O / S);
413         if (IsReference)
414           Out << ')';
415       }
416       return;
417     }
418 
419     // We have an lvalue path. Print it out nicely.
420     if (!IsReference)
421       Out << '&';
422     else if (isLValueOnePastTheEnd())
423       Out << "*(&";
424 
425     QualType ElemTy;
426     if (const ValueDecl *VD = Base.dyn_cast<const ValueDecl*>()) {
427       Out << *VD;
428       ElemTy = VD->getType();
429     } else {
430       const Expr *E = Base.get<const Expr*>();
431       assert(E != nullptr && "Expecting non-null Expr");
432       E->printPretty(Out, nullptr, Ctx.getPrintingPolicy());
433       ElemTy = E->getType();
434     }
435 
436     ArrayRef<LValuePathEntry> Path = getLValuePath();
437     const CXXRecordDecl *CastToBase = nullptr;
438     for (unsigned I = 0, N = Path.size(); I != N; ++I) {
439       if (ElemTy->getAs<RecordType>()) {
440         // The lvalue refers to a class type, so the next path entry is a base
441         // or member.
442         const Decl *BaseOrMember =
443         BaseOrMemberType::getFromOpaqueValue(Path[I].BaseOrMember).getPointer();
444         if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(BaseOrMember)) {
445           CastToBase = RD;
446           ElemTy = Ctx.getRecordType(RD);
447         } else {
448           const ValueDecl *VD = cast<ValueDecl>(BaseOrMember);
449           Out << ".";
450           if (CastToBase)
451             Out << *CastToBase << "::";
452           Out << *VD;
453           ElemTy = VD->getType();
454         }
455       } else {
456         // The lvalue must refer to an array.
457         Out << '[' << Path[I].ArrayIndex << ']';
458         ElemTy = Ctx.getAsArrayType(ElemTy)->getElementType();
459       }
460     }
461 
462     // Handle formatting of one-past-the-end lvalues.
463     if (isLValueOnePastTheEnd()) {
464       // FIXME: If CastToBase is non-0, we should prefix the output with
465       // "(CastToBase*)".
466       Out << " + 1";
467       if (IsReference)
468         Out << ')';
469     }
470     return;
471   }
472   case APValue::Array: {
473     const ArrayType *AT = Ctx.getAsArrayType(Ty);
474     QualType ElemTy = AT->getElementType();
475     Out << '{';
476     if (unsigned N = getArrayInitializedElts()) {
477       getArrayInitializedElt(0).printPretty(Out, Ctx, ElemTy);
478       for (unsigned I = 1; I != N; ++I) {
479         Out << ", ";
480         if (I == 10) {
481           // Avoid printing out the entire contents of large arrays.
482           Out << "...";
483           break;
484         }
485         getArrayInitializedElt(I).printPretty(Out, Ctx, ElemTy);
486       }
487     }
488     Out << '}';
489     return;
490   }
491   case APValue::Struct: {
492     Out << '{';
493     const RecordDecl *RD = Ty->getAs<RecordType>()->getDecl();
494     bool First = true;
495     if (unsigned N = getStructNumBases()) {
496       const CXXRecordDecl *CD = cast<CXXRecordDecl>(RD);
497       CXXRecordDecl::base_class_const_iterator BI = CD->bases_begin();
498       for (unsigned I = 0; I != N; ++I, ++BI) {
499         assert(BI != CD->bases_end());
500         if (!First)
501           Out << ", ";
502         getStructBase(I).printPretty(Out, Ctx, BI->getType());
503         First = false;
504       }
505     }
506     for (const auto *FI : RD->fields()) {
507       if (!First)
508         Out << ", ";
509       if (FI->isUnnamedBitfield()) continue;
510       getStructField(FI->getFieldIndex()).
511         printPretty(Out, Ctx, FI->getType());
512       First = false;
513     }
514     Out << '}';
515     return;
516   }
517   case APValue::Union:
518     Out << '{';
519     if (const FieldDecl *FD = getUnionField()) {
520       Out << "." << *FD << " = ";
521       getUnionValue().printPretty(Out, Ctx, FD->getType());
522     }
523     Out << '}';
524     return;
525   case APValue::MemberPointer:
526     // FIXME: This is not enough to unambiguously identify the member in a
527     // multiple-inheritance scenario.
528     if (const ValueDecl *VD = getMemberPointerDecl()) {
529       Out << '&' << *cast<CXXRecordDecl>(VD->getDeclContext()) << "::" << *VD;
530       return;
531     }
532     Out << "0";
533     return;
534   case APValue::AddrLabelDiff:
535     Out << "&&" << getAddrLabelDiffLHS()->getLabel()->getName();
536     Out << " - ";
537     Out << "&&" << getAddrLabelDiffRHS()->getLabel()->getName();
538     return;
539   }
540   llvm_unreachable("Unknown APValue kind!");
541 }
542 
543 std::string APValue::getAsString(ASTContext &Ctx, QualType Ty) const {
544   std::string Result;
545   llvm::raw_string_ostream Out(Result);
546   printPretty(Out, Ctx, Ty);
547   Out.flush();
548   return Result;
549 }
550 
551 const APValue::LValueBase APValue::getLValueBase() const {
552   assert(isLValue() && "Invalid accessor");
553   return ((const LV*)(const void*)Data.buffer)->BaseAndIsOnePastTheEnd.getPointer();
554 }
555 
556 bool APValue::isLValueOnePastTheEnd() const {
557   assert(isLValue() && "Invalid accessor");
558   return ((const LV*)(const void*)Data.buffer)->BaseAndIsOnePastTheEnd.getInt();
559 }
560 
561 CharUnits &APValue::getLValueOffset() {
562   assert(isLValue() && "Invalid accessor");
563   return ((LV*)(void*)Data.buffer)->Offset;
564 }
565 
566 bool APValue::hasLValuePath() const {
567   assert(isLValue() && "Invalid accessor");
568   return ((const LV*)(const char*)Data.buffer)->hasPath();
569 }
570 
571 ArrayRef<APValue::LValuePathEntry> APValue::getLValuePath() const {
572   assert(isLValue() && hasLValuePath() && "Invalid accessor");
573   const LV &LVal = *((const LV*)(const char*)Data.buffer);
574   return llvm::makeArrayRef(LVal.getPath(), LVal.PathLength);
575 }
576 
577 unsigned APValue::getLValueCallIndex() const {
578   assert(isLValue() && "Invalid accessor");
579   return ((const LV*)(const char*)Data.buffer)->CallIndex;
580 }
581 
582 void APValue::setLValue(LValueBase B, const CharUnits &O, NoLValuePath,
583                         unsigned CallIndex) {
584   assert(isLValue() && "Invalid accessor");
585   LV &LVal = *((LV*)(char*)Data.buffer);
586   LVal.BaseAndIsOnePastTheEnd.setPointer(B);
587   LVal.BaseAndIsOnePastTheEnd.setInt(false);
588   LVal.Offset = O;
589   LVal.CallIndex = CallIndex;
590   LVal.resizePath((unsigned)-1);
591 }
592 
593 void APValue::setLValue(LValueBase B, const CharUnits &O,
594                         ArrayRef<LValuePathEntry> Path, bool IsOnePastTheEnd,
595                         unsigned CallIndex) {
596   assert(isLValue() && "Invalid accessor");
597   LV &LVal = *((LV*)(char*)Data.buffer);
598   LVal.BaseAndIsOnePastTheEnd.setPointer(B);
599   LVal.BaseAndIsOnePastTheEnd.setInt(IsOnePastTheEnd);
600   LVal.Offset = O;
601   LVal.CallIndex = CallIndex;
602   LVal.resizePath(Path.size());
603   memcpy(LVal.getPath(), Path.data(), Path.size() * sizeof(LValuePathEntry));
604 }
605 
606 const ValueDecl *APValue::getMemberPointerDecl() const {
607   assert(isMemberPointer() && "Invalid accessor");
608   const MemberPointerData &MPD =
609       *((const MemberPointerData *)(const char *)Data.buffer);
610   return MPD.MemberAndIsDerivedMember.getPointer();
611 }
612 
613 bool APValue::isMemberPointerToDerivedMember() const {
614   assert(isMemberPointer() && "Invalid accessor");
615   const MemberPointerData &MPD =
616       *((const MemberPointerData *)(const char *)Data.buffer);
617   return MPD.MemberAndIsDerivedMember.getInt();
618 }
619 
620 ArrayRef<const CXXRecordDecl*> APValue::getMemberPointerPath() const {
621   assert(isMemberPointer() && "Invalid accessor");
622   const MemberPointerData &MPD =
623       *((const MemberPointerData *)(const char *)Data.buffer);
624   return llvm::makeArrayRef(MPD.getPath(), MPD.PathLength);
625 }
626 
627 void APValue::MakeLValue() {
628   assert(isUninit() && "Bad state change");
629   static_assert(sizeof(LV) <= DataSize, "LV too big");
630   new ((void*)(char*)Data.buffer) LV();
631   Kind = LValue;
632 }
633 
634 void APValue::MakeArray(unsigned InitElts, unsigned Size) {
635   assert(isUninit() && "Bad state change");
636   new ((void*)(char*)Data.buffer) Arr(InitElts, Size);
637   Kind = Array;
638 }
639 
640 void APValue::MakeMemberPointer(const ValueDecl *Member, bool IsDerivedMember,
641                                 ArrayRef<const CXXRecordDecl*> Path) {
642   assert(isUninit() && "Bad state change");
643   MemberPointerData *MPD = new ((void*)(char*)Data.buffer) MemberPointerData;
644   Kind = MemberPointer;
645   MPD->MemberAndIsDerivedMember.setPointer(Member);
646   MPD->MemberAndIsDerivedMember.setInt(IsDerivedMember);
647   MPD->resizePath(Path.size());
648   memcpy(MPD->getPath(), Path.data(), Path.size()*sizeof(const CXXRecordDecl*));
649 }
650