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 "clang/Basic/Diagnostic.h"
21 #include "llvm/ADT/SmallString.h"
22 #include "llvm/Support/ErrorHandling.h"
23 #include "llvm/Support/raw_ostream.h"
24 using namespace clang;
25
26 namespace {
27 struct LVBase {
28 llvm::PointerIntPair<APValue::LValueBase, 1, bool> BaseAndIsOnePastTheEnd;
29 CharUnits Offset;
30 unsigned PathLength;
31 unsigned CallIndex;
32 };
33 }
34
35 struct APValue::LV : LVBase {
36 static const unsigned InlinePathSpace =
37 (DataSize - sizeof(LVBase)) / sizeof(LValuePathEntry);
38
39 /// Path - The sequence of base classes, fields and array indices to follow to
40 /// walk from Base to the subobject. When performing GCC-style folding, there
41 /// may not be such a path.
42 union {
43 LValuePathEntry Path[InlinePathSpace];
44 LValuePathEntry *PathPtr;
45 };
46
LVAPValue::LV47 LV() { PathLength = (unsigned)-1; }
~LVAPValue::LV48 ~LV() { resizePath(0); }
49
resizePathAPValue::LV50 void resizePath(unsigned Length) {
51 if (Length == PathLength)
52 return;
53 if (hasPathPtr())
54 delete [] PathPtr;
55 PathLength = Length;
56 if (hasPathPtr())
57 PathPtr = new LValuePathEntry[Length];
58 }
59
hasPathAPValue::LV60 bool hasPath() const { return PathLength != (unsigned)-1; }
hasPathPtrAPValue::LV61 bool hasPathPtr() const { return hasPath() && PathLength > InlinePathSpace; }
62
getPathAPValue::LV63 LValuePathEntry *getPath() { return hasPathPtr() ? PathPtr : Path; }
getPathAPValue::LV64 const LValuePathEntry *getPath() const {
65 return hasPathPtr() ? PathPtr : Path;
66 }
67 };
68
69 namespace {
70 struct MemberPointerBase {
71 llvm::PointerIntPair<const ValueDecl*, 1, bool> MemberAndIsDerivedMember;
72 unsigned PathLength;
73 };
74 }
75
76 struct APValue::MemberPointerData : MemberPointerBase {
77 static const unsigned InlinePathSpace =
78 (DataSize - sizeof(MemberPointerBase)) / sizeof(const CXXRecordDecl*);
79 typedef const CXXRecordDecl *PathElem;
80 union {
81 PathElem Path[InlinePathSpace];
82 PathElem *PathPtr;
83 };
84
MemberPointerDataAPValue::MemberPointerData85 MemberPointerData() { PathLength = 0; }
~MemberPointerDataAPValue::MemberPointerData86 ~MemberPointerData() { resizePath(0); }
87
resizePathAPValue::MemberPointerData88 void resizePath(unsigned Length) {
89 if (Length == PathLength)
90 return;
91 if (hasPathPtr())
92 delete [] PathPtr;
93 PathLength = Length;
94 if (hasPathPtr())
95 PathPtr = new PathElem[Length];
96 }
97
hasPathPtrAPValue::MemberPointerData98 bool hasPathPtr() const { return PathLength > InlinePathSpace; }
99
getPathAPValue::MemberPointerData100 PathElem *getPath() { return hasPathPtr() ? PathPtr : Path; }
getPathAPValue::MemberPointerData101 const PathElem *getPath() const {
102 return hasPathPtr() ? PathPtr : Path;
103 }
104 };
105
106 // FIXME: Reduce the malloc traffic here.
107
Arr(unsigned NumElts,unsigned Size)108 APValue::Arr::Arr(unsigned NumElts, unsigned Size) :
109 Elts(new APValue[NumElts + (NumElts != Size ? 1 : 0)]),
110 NumElts(NumElts), ArrSize(Size) {}
~Arr()111 APValue::Arr::~Arr() { delete [] Elts; }
112
StructData(unsigned NumBases,unsigned NumFields)113 APValue::StructData::StructData(unsigned NumBases, unsigned NumFields) :
114 Elts(new APValue[NumBases+NumFields]),
115 NumBases(NumBases), NumFields(NumFields) {}
~StructData()116 APValue::StructData::~StructData() {
117 delete [] Elts;
118 }
119
UnionData()120 APValue::UnionData::UnionData() : Field(nullptr), Value(new APValue) {}
~UnionData()121 APValue::UnionData::~UnionData () {
122 delete Value;
123 }
124
APValue(const APValue & RHS)125 APValue::APValue(const APValue &RHS) : Kind(Uninitialized) {
126 switch (RHS.getKind()) {
127 case Uninitialized:
128 break;
129 case Int:
130 MakeInt();
131 setInt(RHS.getInt());
132 break;
133 case Float:
134 MakeFloat();
135 setFloat(RHS.getFloat());
136 break;
137 case Vector:
138 MakeVector();
139 setVector(((const Vec *)(const char *)RHS.Data.buffer)->Elts,
140 RHS.getVectorLength());
141 break;
142 case ComplexInt:
143 MakeComplexInt();
144 setComplexInt(RHS.getComplexIntReal(), RHS.getComplexIntImag());
145 break;
146 case ComplexFloat:
147 MakeComplexFloat();
148 setComplexFloat(RHS.getComplexFloatReal(), RHS.getComplexFloatImag());
149 break;
150 case LValue:
151 MakeLValue();
152 if (RHS.hasLValuePath())
153 setLValue(RHS.getLValueBase(), RHS.getLValueOffset(), RHS.getLValuePath(),
154 RHS.isLValueOnePastTheEnd(), RHS.getLValueCallIndex());
155 else
156 setLValue(RHS.getLValueBase(), RHS.getLValueOffset(), NoLValuePath(),
157 RHS.getLValueCallIndex());
158 break;
159 case Array:
160 MakeArray(RHS.getArrayInitializedElts(), RHS.getArraySize());
161 for (unsigned I = 0, N = RHS.getArrayInitializedElts(); I != N; ++I)
162 getArrayInitializedElt(I) = RHS.getArrayInitializedElt(I);
163 if (RHS.hasArrayFiller())
164 getArrayFiller() = RHS.getArrayFiller();
165 break;
166 case Struct:
167 MakeStruct(RHS.getStructNumBases(), RHS.getStructNumFields());
168 for (unsigned I = 0, N = RHS.getStructNumBases(); I != N; ++I)
169 getStructBase(I) = RHS.getStructBase(I);
170 for (unsigned I = 0, N = RHS.getStructNumFields(); I != N; ++I)
171 getStructField(I) = RHS.getStructField(I);
172 break;
173 case Union:
174 MakeUnion();
175 setUnion(RHS.getUnionField(), RHS.getUnionValue());
176 break;
177 case MemberPointer:
178 MakeMemberPointer(RHS.getMemberPointerDecl(),
179 RHS.isMemberPointerToDerivedMember(),
180 RHS.getMemberPointerPath());
181 break;
182 case AddrLabelDiff:
183 MakeAddrLabelDiff();
184 setAddrLabelDiff(RHS.getAddrLabelDiffLHS(), RHS.getAddrLabelDiffRHS());
185 break;
186 }
187 }
188
DestroyDataAndMakeUninit()189 void APValue::DestroyDataAndMakeUninit() {
190 if (Kind == Int)
191 ((APSInt*)(char*)Data.buffer)->~APSInt();
192 else if (Kind == Float)
193 ((APFloat*)(char*)Data.buffer)->~APFloat();
194 else if (Kind == Vector)
195 ((Vec*)(char*)Data.buffer)->~Vec();
196 else if (Kind == ComplexInt)
197 ((ComplexAPSInt*)(char*)Data.buffer)->~ComplexAPSInt();
198 else if (Kind == ComplexFloat)
199 ((ComplexAPFloat*)(char*)Data.buffer)->~ComplexAPFloat();
200 else if (Kind == LValue)
201 ((LV*)(char*)Data.buffer)->~LV();
202 else if (Kind == Array)
203 ((Arr*)(char*)Data.buffer)->~Arr();
204 else if (Kind == Struct)
205 ((StructData*)(char*)Data.buffer)->~StructData();
206 else if (Kind == Union)
207 ((UnionData*)(char*)Data.buffer)->~UnionData();
208 else if (Kind == MemberPointer)
209 ((MemberPointerData*)(char*)Data.buffer)->~MemberPointerData();
210 else if (Kind == AddrLabelDiff)
211 ((AddrLabelDiffData*)(char*)Data.buffer)->~AddrLabelDiffData();
212 Kind = Uninitialized;
213 }
214
needsCleanup() const215 bool APValue::needsCleanup() const {
216 switch (getKind()) {
217 case Uninitialized:
218 case AddrLabelDiff:
219 return false;
220 case Struct:
221 case Union:
222 case Array:
223 case Vector:
224 return true;
225 case Int:
226 return getInt().needsCleanup();
227 case Float:
228 return getFloat().needsCleanup();
229 case ComplexFloat:
230 assert(getComplexFloatImag().needsCleanup() ==
231 getComplexFloatReal().needsCleanup() &&
232 "In _Complex float types, real and imaginary values always have the "
233 "same size.");
234 return getComplexFloatReal().needsCleanup();
235 case ComplexInt:
236 assert(getComplexIntImag().needsCleanup() ==
237 getComplexIntReal().needsCleanup() &&
238 "In _Complex int types, real and imaginary values must have the "
239 "same size.");
240 return getComplexIntReal().needsCleanup();
241 case LValue:
242 return reinterpret_cast<const LV *>(Data.buffer)->hasPathPtr();
243 case MemberPointer:
244 return reinterpret_cast<const MemberPointerData *>(Data.buffer)
245 ->hasPathPtr();
246 }
247 llvm_unreachable("Unknown APValue kind!");
248 }
249
swap(APValue & RHS)250 void APValue::swap(APValue &RHS) {
251 std::swap(Kind, RHS.Kind);
252 char TmpData[DataSize];
253 memcpy(TmpData, Data.buffer, DataSize);
254 memcpy(Data.buffer, RHS.Data.buffer, DataSize);
255 memcpy(RHS.Data.buffer, TmpData, DataSize);
256 }
257
dump() const258 void APValue::dump() const {
259 dump(llvm::errs());
260 llvm::errs() << '\n';
261 }
262
GetApproxValue(const llvm::APFloat & F)263 static double GetApproxValue(const llvm::APFloat &F) {
264 llvm::APFloat V = F;
265 bool ignored;
266 V.convert(llvm::APFloat::IEEEdouble, llvm::APFloat::rmNearestTiesToEven,
267 &ignored);
268 return V.convertToDouble();
269 }
270
dump(raw_ostream & OS) const271 void APValue::dump(raw_ostream &OS) const {
272 switch (getKind()) {
273 case Uninitialized:
274 OS << "Uninitialized";
275 return;
276 case Int:
277 OS << "Int: " << getInt();
278 return;
279 case Float:
280 OS << "Float: " << GetApproxValue(getFloat());
281 return;
282 case Vector:
283 OS << "Vector: ";
284 getVectorElt(0).dump(OS);
285 for (unsigned i = 1; i != getVectorLength(); ++i) {
286 OS << ", ";
287 getVectorElt(i).dump(OS);
288 }
289 return;
290 case ComplexInt:
291 OS << "ComplexInt: " << getComplexIntReal() << ", " << getComplexIntImag();
292 return;
293 case ComplexFloat:
294 OS << "ComplexFloat: " << GetApproxValue(getComplexFloatReal())
295 << ", " << GetApproxValue(getComplexFloatImag());
296 return;
297 case LValue:
298 OS << "LValue: <todo>";
299 return;
300 case Array:
301 OS << "Array: ";
302 for (unsigned I = 0, N = getArrayInitializedElts(); I != N; ++I) {
303 getArrayInitializedElt(I).dump(OS);
304 if (I != getArraySize() - 1) OS << ", ";
305 }
306 if (hasArrayFiller()) {
307 OS << getArraySize() - getArrayInitializedElts() << " x ";
308 getArrayFiller().dump(OS);
309 }
310 return;
311 case Struct:
312 OS << "Struct ";
313 if (unsigned N = getStructNumBases()) {
314 OS << " bases: ";
315 getStructBase(0).dump(OS);
316 for (unsigned I = 1; I != N; ++I) {
317 OS << ", ";
318 getStructBase(I).dump(OS);
319 }
320 }
321 if (unsigned N = getStructNumFields()) {
322 OS << " fields: ";
323 getStructField(0).dump(OS);
324 for (unsigned I = 1; I != N; ++I) {
325 OS << ", ";
326 getStructField(I).dump(OS);
327 }
328 }
329 return;
330 case Union:
331 OS << "Union: ";
332 getUnionValue().dump(OS);
333 return;
334 case MemberPointer:
335 OS << "MemberPointer: <todo>";
336 return;
337 case AddrLabelDiff:
338 OS << "AddrLabelDiff: <todo>";
339 return;
340 }
341 llvm_unreachable("Unknown APValue kind!");
342 }
343
printPretty(raw_ostream & Out,ASTContext & Ctx,QualType Ty) const344 void APValue::printPretty(raw_ostream &Out, ASTContext &Ctx, QualType Ty) const{
345 switch (getKind()) {
346 case APValue::Uninitialized:
347 Out << "<uninitialized>";
348 return;
349 case APValue::Int:
350 if (Ty->isBooleanType())
351 Out << (getInt().getBoolValue() ? "true" : "false");
352 else
353 Out << getInt();
354 return;
355 case APValue::Float:
356 Out << GetApproxValue(getFloat());
357 return;
358 case APValue::Vector: {
359 Out << '{';
360 QualType ElemTy = Ty->getAs<VectorType>()->getElementType();
361 getVectorElt(0).printPretty(Out, Ctx, ElemTy);
362 for (unsigned i = 1; i != getVectorLength(); ++i) {
363 Out << ", ";
364 getVectorElt(i).printPretty(Out, Ctx, ElemTy);
365 }
366 Out << '}';
367 return;
368 }
369 case APValue::ComplexInt:
370 Out << getComplexIntReal() << "+" << getComplexIntImag() << "i";
371 return;
372 case APValue::ComplexFloat:
373 Out << GetApproxValue(getComplexFloatReal()) << "+"
374 << GetApproxValue(getComplexFloatImag()) << "i";
375 return;
376 case APValue::LValue: {
377 LValueBase Base = getLValueBase();
378 if (!Base) {
379 Out << "0";
380 return;
381 }
382
383 bool IsReference = Ty->isReferenceType();
384 QualType InnerTy
385 = IsReference ? Ty.getNonReferenceType() : Ty->getPointeeType();
386 if (InnerTy.isNull())
387 InnerTy = Ty;
388
389 if (!hasLValuePath()) {
390 // No lvalue path: just print the offset.
391 CharUnits O = getLValueOffset();
392 CharUnits S = Ctx.getTypeSizeInChars(InnerTy);
393 if (!O.isZero()) {
394 if (IsReference)
395 Out << "*(";
396 if (O % S) {
397 Out << "(char*)";
398 S = CharUnits::One();
399 }
400 Out << '&';
401 } else if (!IsReference)
402 Out << '&';
403
404 if (const ValueDecl *VD = Base.dyn_cast<const ValueDecl*>())
405 Out << *VD;
406 else {
407 assert(Base.get<const Expr *>() != nullptr &&
408 "Expecting non-null Expr");
409 Base.get<const Expr*>()->printPretty(Out, nullptr,
410 Ctx.getPrintingPolicy());
411 }
412
413 if (!O.isZero()) {
414 Out << " + " << (O / S);
415 if (IsReference)
416 Out << ')';
417 }
418 return;
419 }
420
421 // We have an lvalue path. Print it out nicely.
422 if (!IsReference)
423 Out << '&';
424 else if (isLValueOnePastTheEnd())
425 Out << "*(&";
426
427 QualType ElemTy;
428 if (const ValueDecl *VD = Base.dyn_cast<const ValueDecl*>()) {
429 Out << *VD;
430 ElemTy = VD->getType();
431 } else {
432 const Expr *E = Base.get<const Expr*>();
433 assert(E != nullptr && "Expecting non-null Expr");
434 E->printPretty(Out, nullptr, Ctx.getPrintingPolicy());
435 ElemTy = E->getType();
436 }
437
438 ArrayRef<LValuePathEntry> Path = getLValuePath();
439 const CXXRecordDecl *CastToBase = nullptr;
440 for (unsigned I = 0, N = Path.size(); I != N; ++I) {
441 if (ElemTy->getAs<RecordType>()) {
442 // The lvalue refers to a class type, so the next path entry is a base
443 // or member.
444 const Decl *BaseOrMember =
445 BaseOrMemberType::getFromOpaqueValue(Path[I].BaseOrMember).getPointer();
446 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(BaseOrMember)) {
447 CastToBase = RD;
448 ElemTy = Ctx.getRecordType(RD);
449 } else {
450 const ValueDecl *VD = cast<ValueDecl>(BaseOrMember);
451 Out << ".";
452 if (CastToBase)
453 Out << *CastToBase << "::";
454 Out << *VD;
455 ElemTy = VD->getType();
456 }
457 } else {
458 // The lvalue must refer to an array.
459 Out << '[' << Path[I].ArrayIndex << ']';
460 ElemTy = Ctx.getAsArrayType(ElemTy)->getElementType();
461 }
462 }
463
464 // Handle formatting of one-past-the-end lvalues.
465 if (isLValueOnePastTheEnd()) {
466 // FIXME: If CastToBase is non-0, we should prefix the output with
467 // "(CastToBase*)".
468 Out << " + 1";
469 if (IsReference)
470 Out << ')';
471 }
472 return;
473 }
474 case APValue::Array: {
475 const ArrayType *AT = Ctx.getAsArrayType(Ty);
476 QualType ElemTy = AT->getElementType();
477 Out << '{';
478 if (unsigned N = getArrayInitializedElts()) {
479 getArrayInitializedElt(0).printPretty(Out, Ctx, ElemTy);
480 for (unsigned I = 1; I != N; ++I) {
481 Out << ", ";
482 if (I == 10) {
483 // Avoid printing out the entire contents of large arrays.
484 Out << "...";
485 break;
486 }
487 getArrayInitializedElt(I).printPretty(Out, Ctx, ElemTy);
488 }
489 }
490 Out << '}';
491 return;
492 }
493 case APValue::Struct: {
494 Out << '{';
495 const RecordDecl *RD = Ty->getAs<RecordType>()->getDecl();
496 bool First = true;
497 if (unsigned N = getStructNumBases()) {
498 const CXXRecordDecl *CD = cast<CXXRecordDecl>(RD);
499 CXXRecordDecl::base_class_const_iterator BI = CD->bases_begin();
500 for (unsigned I = 0; I != N; ++I, ++BI) {
501 assert(BI != CD->bases_end());
502 if (!First)
503 Out << ", ";
504 getStructBase(I).printPretty(Out, Ctx, BI->getType());
505 First = false;
506 }
507 }
508 for (const auto *FI : RD->fields()) {
509 if (!First)
510 Out << ", ";
511 if (FI->isUnnamedBitfield()) continue;
512 getStructField(FI->getFieldIndex()).
513 printPretty(Out, Ctx, FI->getType());
514 First = false;
515 }
516 Out << '}';
517 return;
518 }
519 case APValue::Union:
520 Out << '{';
521 if (const FieldDecl *FD = getUnionField()) {
522 Out << "." << *FD << " = ";
523 getUnionValue().printPretty(Out, Ctx, FD->getType());
524 }
525 Out << '}';
526 return;
527 case APValue::MemberPointer:
528 // FIXME: This is not enough to unambiguously identify the member in a
529 // multiple-inheritance scenario.
530 if (const ValueDecl *VD = getMemberPointerDecl()) {
531 Out << '&' << *cast<CXXRecordDecl>(VD->getDeclContext()) << "::" << *VD;
532 return;
533 }
534 Out << "0";
535 return;
536 case APValue::AddrLabelDiff:
537 Out << "&&" << getAddrLabelDiffLHS()->getLabel()->getName();
538 Out << " - ";
539 Out << "&&" << getAddrLabelDiffRHS()->getLabel()->getName();
540 return;
541 }
542 llvm_unreachable("Unknown APValue kind!");
543 }
544
getAsString(ASTContext & Ctx,QualType Ty) const545 std::string APValue::getAsString(ASTContext &Ctx, QualType Ty) const {
546 std::string Result;
547 llvm::raw_string_ostream Out(Result);
548 printPretty(Out, Ctx, Ty);
549 Out.flush();
550 return Result;
551 }
552
getLValueBase() const553 const APValue::LValueBase APValue::getLValueBase() const {
554 assert(isLValue() && "Invalid accessor");
555 return ((const LV*)(const void*)Data.buffer)->BaseAndIsOnePastTheEnd.getPointer();
556 }
557
isLValueOnePastTheEnd() const558 bool APValue::isLValueOnePastTheEnd() const {
559 assert(isLValue() && "Invalid accessor");
560 return ((const LV*)(const void*)Data.buffer)->BaseAndIsOnePastTheEnd.getInt();
561 }
562
getLValueOffset()563 CharUnits &APValue::getLValueOffset() {
564 assert(isLValue() && "Invalid accessor");
565 return ((LV*)(void*)Data.buffer)->Offset;
566 }
567
hasLValuePath() const568 bool APValue::hasLValuePath() const {
569 assert(isLValue() && "Invalid accessor");
570 return ((const LV*)(const char*)Data.buffer)->hasPath();
571 }
572
getLValuePath() const573 ArrayRef<APValue::LValuePathEntry> APValue::getLValuePath() const {
574 assert(isLValue() && hasLValuePath() && "Invalid accessor");
575 const LV &LVal = *((const LV*)(const char*)Data.buffer);
576 return llvm::makeArrayRef(LVal.getPath(), LVal.PathLength);
577 }
578
getLValueCallIndex() const579 unsigned APValue::getLValueCallIndex() const {
580 assert(isLValue() && "Invalid accessor");
581 return ((const LV*)(const char*)Data.buffer)->CallIndex;
582 }
583
setLValue(LValueBase B,const CharUnits & O,NoLValuePath,unsigned CallIndex)584 void APValue::setLValue(LValueBase B, const CharUnits &O, NoLValuePath,
585 unsigned CallIndex) {
586 assert(isLValue() && "Invalid accessor");
587 LV &LVal = *((LV*)(char*)Data.buffer);
588 LVal.BaseAndIsOnePastTheEnd.setPointer(B);
589 LVal.BaseAndIsOnePastTheEnd.setInt(false);
590 LVal.Offset = O;
591 LVal.CallIndex = CallIndex;
592 LVal.resizePath((unsigned)-1);
593 }
594
setLValue(LValueBase B,const CharUnits & O,ArrayRef<LValuePathEntry> Path,bool IsOnePastTheEnd,unsigned CallIndex)595 void APValue::setLValue(LValueBase B, const CharUnits &O,
596 ArrayRef<LValuePathEntry> Path, bool IsOnePastTheEnd,
597 unsigned CallIndex) {
598 assert(isLValue() && "Invalid accessor");
599 LV &LVal = *((LV*)(char*)Data.buffer);
600 LVal.BaseAndIsOnePastTheEnd.setPointer(B);
601 LVal.BaseAndIsOnePastTheEnd.setInt(IsOnePastTheEnd);
602 LVal.Offset = O;
603 LVal.CallIndex = CallIndex;
604 LVal.resizePath(Path.size());
605 memcpy(LVal.getPath(), Path.data(), Path.size() * sizeof(LValuePathEntry));
606 }
607
getMemberPointerDecl() const608 const ValueDecl *APValue::getMemberPointerDecl() const {
609 assert(isMemberPointer() && "Invalid accessor");
610 const MemberPointerData &MPD =
611 *((const MemberPointerData *)(const char *)Data.buffer);
612 return MPD.MemberAndIsDerivedMember.getPointer();
613 }
614
isMemberPointerToDerivedMember() const615 bool APValue::isMemberPointerToDerivedMember() const {
616 assert(isMemberPointer() && "Invalid accessor");
617 const MemberPointerData &MPD =
618 *((const MemberPointerData *)(const char *)Data.buffer);
619 return MPD.MemberAndIsDerivedMember.getInt();
620 }
621
getMemberPointerPath() const622 ArrayRef<const CXXRecordDecl*> APValue::getMemberPointerPath() const {
623 assert(isMemberPointer() && "Invalid accessor");
624 const MemberPointerData &MPD =
625 *((const MemberPointerData *)(const char *)Data.buffer);
626 return llvm::makeArrayRef(MPD.getPath(), MPD.PathLength);
627 }
628
MakeLValue()629 void APValue::MakeLValue() {
630 assert(isUninit() && "Bad state change");
631 static_assert(sizeof(LV) <= DataSize, "LV too big");
632 new ((void*)(char*)Data.buffer) LV();
633 Kind = LValue;
634 }
635
MakeArray(unsigned InitElts,unsigned Size)636 void APValue::MakeArray(unsigned InitElts, unsigned Size) {
637 assert(isUninit() && "Bad state change");
638 new ((void*)(char*)Data.buffer) Arr(InitElts, Size);
639 Kind = Array;
640 }
641
MakeMemberPointer(const ValueDecl * Member,bool IsDerivedMember,ArrayRef<const CXXRecordDecl * > Path)642 void APValue::MakeMemberPointer(const ValueDecl *Member, bool IsDerivedMember,
643 ArrayRef<const CXXRecordDecl*> Path) {
644 assert(isUninit() && "Bad state change");
645 MemberPointerData *MPD = new ((void*)(char*)Data.buffer) MemberPointerData;
646 Kind = MemberPointer;
647 MPD->MemberAndIsDerivedMember.setPointer(Member);
648 MPD->MemberAndIsDerivedMember.setInt(IsDerivedMember);
649 MPD->resizePath(Path.size());
650 memcpy(MPD->getPath(), Path.data(), Path.size()*sizeof(const CXXRecordDecl*));
651 }
652