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 APValue::LValueBase Base;
27 CharUnits Offset;
28 unsigned PathLength;
29 bool IsNullPtr : 1;
30 bool IsOnePastTheEnd : 1;
31 };
32 }
33
getOpaqueValue() const34 void *APValue::LValueBase::getOpaqueValue() const {
35 return Ptr.getOpaqueValue();
36 }
37
isNull() const38 bool APValue::LValueBase::isNull() const {
39 return Ptr.isNull();
40 }
41
operator bool() const42 APValue::LValueBase::operator bool () const {
43 return static_cast<bool>(Ptr);
44 }
45
46 clang::APValue::LValueBase
getEmptyKey()47 llvm::DenseMapInfo<clang::APValue::LValueBase>::getEmptyKey() {
48 return clang::APValue::LValueBase(
49 DenseMapInfo<clang::APValue::LValueBase::PtrTy>::getEmptyKey(),
50 DenseMapInfo<unsigned>::getEmptyKey(),
51 DenseMapInfo<unsigned>::getEmptyKey());
52 }
53
54 clang::APValue::LValueBase
getTombstoneKey()55 llvm::DenseMapInfo<clang::APValue::LValueBase>::getTombstoneKey() {
56 return clang::APValue::LValueBase(
57 DenseMapInfo<clang::APValue::LValueBase::PtrTy>::getTombstoneKey(),
58 DenseMapInfo<unsigned>::getTombstoneKey(),
59 DenseMapInfo<unsigned>::getTombstoneKey());
60 }
61
getHashValue(const clang::APValue::LValueBase & Base)62 unsigned llvm::DenseMapInfo<clang::APValue::LValueBase>::getHashValue(
63 const clang::APValue::LValueBase &Base) {
64 llvm::FoldingSetNodeID ID;
65 ID.AddPointer(Base.getOpaqueValue());
66 ID.AddInteger(Base.getCallIndex());
67 ID.AddInteger(Base.getVersion());
68 return ID.ComputeHash();
69 }
70
isEqual(const clang::APValue::LValueBase & LHS,const clang::APValue::LValueBase & RHS)71 bool llvm::DenseMapInfo<clang::APValue::LValueBase>::isEqual(
72 const clang::APValue::LValueBase &LHS,
73 const clang::APValue::LValueBase &RHS) {
74 return LHS == RHS;
75 }
76
77 struct APValue::LV : LVBase {
78 static const unsigned InlinePathSpace =
79 (DataSize - sizeof(LVBase)) / sizeof(LValuePathEntry);
80
81 /// Path - The sequence of base classes, fields and array indices to follow to
82 /// walk from Base to the subobject. When performing GCC-style folding, there
83 /// may not be such a path.
84 union {
85 LValuePathEntry Path[InlinePathSpace];
86 LValuePathEntry *PathPtr;
87 };
88
LVAPValue::LV89 LV() { PathLength = (unsigned)-1; }
~LVAPValue::LV90 ~LV() { resizePath(0); }
91
resizePathAPValue::LV92 void resizePath(unsigned Length) {
93 if (Length == PathLength)
94 return;
95 if (hasPathPtr())
96 delete [] PathPtr;
97 PathLength = Length;
98 if (hasPathPtr())
99 PathPtr = new LValuePathEntry[Length];
100 }
101
hasPathAPValue::LV102 bool hasPath() const { return PathLength != (unsigned)-1; }
hasPathPtrAPValue::LV103 bool hasPathPtr() const { return hasPath() && PathLength > InlinePathSpace; }
104
getPathAPValue::LV105 LValuePathEntry *getPath() { return hasPathPtr() ? PathPtr : Path; }
getPathAPValue::LV106 const LValuePathEntry *getPath() const {
107 return hasPathPtr() ? PathPtr : Path;
108 }
109 };
110
111 namespace {
112 struct MemberPointerBase {
113 llvm::PointerIntPair<const ValueDecl*, 1, bool> MemberAndIsDerivedMember;
114 unsigned PathLength;
115 };
116 }
117
118 struct APValue::MemberPointerData : MemberPointerBase {
119 static const unsigned InlinePathSpace =
120 (DataSize - sizeof(MemberPointerBase)) / sizeof(const CXXRecordDecl*);
121 typedef const CXXRecordDecl *PathElem;
122 union {
123 PathElem Path[InlinePathSpace];
124 PathElem *PathPtr;
125 };
126
MemberPointerDataAPValue::MemberPointerData127 MemberPointerData() { PathLength = 0; }
~MemberPointerDataAPValue::MemberPointerData128 ~MemberPointerData() { resizePath(0); }
129
resizePathAPValue::MemberPointerData130 void resizePath(unsigned Length) {
131 if (Length == PathLength)
132 return;
133 if (hasPathPtr())
134 delete [] PathPtr;
135 PathLength = Length;
136 if (hasPathPtr())
137 PathPtr = new PathElem[Length];
138 }
139
hasPathPtrAPValue::MemberPointerData140 bool hasPathPtr() const { return PathLength > InlinePathSpace; }
141
getPathAPValue::MemberPointerData142 PathElem *getPath() { return hasPathPtr() ? PathPtr : Path; }
getPathAPValue::MemberPointerData143 const PathElem *getPath() const {
144 return hasPathPtr() ? PathPtr : Path;
145 }
146 };
147
148 // FIXME: Reduce the malloc traffic here.
149
Arr(unsigned NumElts,unsigned Size)150 APValue::Arr::Arr(unsigned NumElts, unsigned Size) :
151 Elts(new APValue[NumElts + (NumElts != Size ? 1 : 0)]),
152 NumElts(NumElts), ArrSize(Size) {}
~Arr()153 APValue::Arr::~Arr() { delete [] Elts; }
154
StructData(unsigned NumBases,unsigned NumFields)155 APValue::StructData::StructData(unsigned NumBases, unsigned NumFields) :
156 Elts(new APValue[NumBases+NumFields]),
157 NumBases(NumBases), NumFields(NumFields) {}
~StructData()158 APValue::StructData::~StructData() {
159 delete [] Elts;
160 }
161
UnionData()162 APValue::UnionData::UnionData() : Field(nullptr), Value(new APValue) {}
~UnionData()163 APValue::UnionData::~UnionData () {
164 delete Value;
165 }
166
APValue(const APValue & RHS)167 APValue::APValue(const APValue &RHS) : Kind(Uninitialized) {
168 switch (RHS.getKind()) {
169 case Uninitialized:
170 break;
171 case Int:
172 MakeInt();
173 setInt(RHS.getInt());
174 break;
175 case Float:
176 MakeFloat();
177 setFloat(RHS.getFloat());
178 break;
179 case Vector:
180 MakeVector();
181 setVector(((const Vec *)(const char *)RHS.Data.buffer)->Elts,
182 RHS.getVectorLength());
183 break;
184 case ComplexInt:
185 MakeComplexInt();
186 setComplexInt(RHS.getComplexIntReal(), RHS.getComplexIntImag());
187 break;
188 case ComplexFloat:
189 MakeComplexFloat();
190 setComplexFloat(RHS.getComplexFloatReal(), RHS.getComplexFloatImag());
191 break;
192 case LValue:
193 MakeLValue();
194 if (RHS.hasLValuePath())
195 setLValue(RHS.getLValueBase(), RHS.getLValueOffset(), RHS.getLValuePath(),
196 RHS.isLValueOnePastTheEnd(), RHS.isNullPointer());
197 else
198 setLValue(RHS.getLValueBase(), RHS.getLValueOffset(), NoLValuePath(),
199 RHS.isNullPointer());
200 break;
201 case Array:
202 MakeArray(RHS.getArrayInitializedElts(), RHS.getArraySize());
203 for (unsigned I = 0, N = RHS.getArrayInitializedElts(); I != N; ++I)
204 getArrayInitializedElt(I) = RHS.getArrayInitializedElt(I);
205 if (RHS.hasArrayFiller())
206 getArrayFiller() = RHS.getArrayFiller();
207 break;
208 case Struct:
209 MakeStruct(RHS.getStructNumBases(), RHS.getStructNumFields());
210 for (unsigned I = 0, N = RHS.getStructNumBases(); I != N; ++I)
211 getStructBase(I) = RHS.getStructBase(I);
212 for (unsigned I = 0, N = RHS.getStructNumFields(); I != N; ++I)
213 getStructField(I) = RHS.getStructField(I);
214 break;
215 case Union:
216 MakeUnion();
217 setUnion(RHS.getUnionField(), RHS.getUnionValue());
218 break;
219 case MemberPointer:
220 MakeMemberPointer(RHS.getMemberPointerDecl(),
221 RHS.isMemberPointerToDerivedMember(),
222 RHS.getMemberPointerPath());
223 break;
224 case AddrLabelDiff:
225 MakeAddrLabelDiff();
226 setAddrLabelDiff(RHS.getAddrLabelDiffLHS(), RHS.getAddrLabelDiffRHS());
227 break;
228 }
229 }
230
DestroyDataAndMakeUninit()231 void APValue::DestroyDataAndMakeUninit() {
232 if (Kind == Int)
233 ((APSInt*)(char*)Data.buffer)->~APSInt();
234 else if (Kind == Float)
235 ((APFloat*)(char*)Data.buffer)->~APFloat();
236 else if (Kind == Vector)
237 ((Vec*)(char*)Data.buffer)->~Vec();
238 else if (Kind == ComplexInt)
239 ((ComplexAPSInt*)(char*)Data.buffer)->~ComplexAPSInt();
240 else if (Kind == ComplexFloat)
241 ((ComplexAPFloat*)(char*)Data.buffer)->~ComplexAPFloat();
242 else if (Kind == LValue)
243 ((LV*)(char*)Data.buffer)->~LV();
244 else if (Kind == Array)
245 ((Arr*)(char*)Data.buffer)->~Arr();
246 else if (Kind == Struct)
247 ((StructData*)(char*)Data.buffer)->~StructData();
248 else if (Kind == Union)
249 ((UnionData*)(char*)Data.buffer)->~UnionData();
250 else if (Kind == MemberPointer)
251 ((MemberPointerData*)(char*)Data.buffer)->~MemberPointerData();
252 else if (Kind == AddrLabelDiff)
253 ((AddrLabelDiffData*)(char*)Data.buffer)->~AddrLabelDiffData();
254 Kind = Uninitialized;
255 }
256
needsCleanup() const257 bool APValue::needsCleanup() const {
258 switch (getKind()) {
259 case Uninitialized:
260 case AddrLabelDiff:
261 return false;
262 case Struct:
263 case Union:
264 case Array:
265 case Vector:
266 return true;
267 case Int:
268 return getInt().needsCleanup();
269 case Float:
270 return getFloat().needsCleanup();
271 case ComplexFloat:
272 assert(getComplexFloatImag().needsCleanup() ==
273 getComplexFloatReal().needsCleanup() &&
274 "In _Complex float types, real and imaginary values always have the "
275 "same size.");
276 return getComplexFloatReal().needsCleanup();
277 case ComplexInt:
278 assert(getComplexIntImag().needsCleanup() ==
279 getComplexIntReal().needsCleanup() &&
280 "In _Complex int types, real and imaginary values must have the "
281 "same size.");
282 return getComplexIntReal().needsCleanup();
283 case LValue:
284 return reinterpret_cast<const LV *>(Data.buffer)->hasPathPtr();
285 case MemberPointer:
286 return reinterpret_cast<const MemberPointerData *>(Data.buffer)
287 ->hasPathPtr();
288 }
289 llvm_unreachable("Unknown APValue kind!");
290 }
291
swap(APValue & RHS)292 void APValue::swap(APValue &RHS) {
293 std::swap(Kind, RHS.Kind);
294 char TmpData[DataSize];
295 memcpy(TmpData, Data.buffer, DataSize);
296 memcpy(Data.buffer, RHS.Data.buffer, DataSize);
297 memcpy(RHS.Data.buffer, TmpData, DataSize);
298 }
299
dump() const300 LLVM_DUMP_METHOD void APValue::dump() const {
301 dump(llvm::errs());
302 llvm::errs() << '\n';
303 }
304
GetApproxValue(const llvm::APFloat & F)305 static double GetApproxValue(const llvm::APFloat &F) {
306 llvm::APFloat V = F;
307 bool ignored;
308 V.convert(llvm::APFloat::IEEEdouble(), llvm::APFloat::rmNearestTiesToEven,
309 &ignored);
310 return V.convertToDouble();
311 }
312
dump(raw_ostream & OS) const313 void APValue::dump(raw_ostream &OS) const {
314 switch (getKind()) {
315 case Uninitialized:
316 OS << "Uninitialized";
317 return;
318 case Int:
319 OS << "Int: " << getInt();
320 return;
321 case Float:
322 OS << "Float: " << GetApproxValue(getFloat());
323 return;
324 case Vector:
325 OS << "Vector: ";
326 getVectorElt(0).dump(OS);
327 for (unsigned i = 1; i != getVectorLength(); ++i) {
328 OS << ", ";
329 getVectorElt(i).dump(OS);
330 }
331 return;
332 case ComplexInt:
333 OS << "ComplexInt: " << getComplexIntReal() << ", " << getComplexIntImag();
334 return;
335 case ComplexFloat:
336 OS << "ComplexFloat: " << GetApproxValue(getComplexFloatReal())
337 << ", " << GetApproxValue(getComplexFloatImag());
338 return;
339 case LValue:
340 OS << "LValue: <todo>";
341 return;
342 case Array:
343 OS << "Array: ";
344 for (unsigned I = 0, N = getArrayInitializedElts(); I != N; ++I) {
345 getArrayInitializedElt(I).dump(OS);
346 if (I != getArraySize() - 1) OS << ", ";
347 }
348 if (hasArrayFiller()) {
349 OS << getArraySize() - getArrayInitializedElts() << " x ";
350 getArrayFiller().dump(OS);
351 }
352 return;
353 case Struct:
354 OS << "Struct ";
355 if (unsigned N = getStructNumBases()) {
356 OS << " bases: ";
357 getStructBase(0).dump(OS);
358 for (unsigned I = 1; I != N; ++I) {
359 OS << ", ";
360 getStructBase(I).dump(OS);
361 }
362 }
363 if (unsigned N = getStructNumFields()) {
364 OS << " fields: ";
365 getStructField(0).dump(OS);
366 for (unsigned I = 1; I != N; ++I) {
367 OS << ", ";
368 getStructField(I).dump(OS);
369 }
370 }
371 return;
372 case Union:
373 OS << "Union: ";
374 getUnionValue().dump(OS);
375 return;
376 case MemberPointer:
377 OS << "MemberPointer: <todo>";
378 return;
379 case AddrLabelDiff:
380 OS << "AddrLabelDiff: <todo>";
381 return;
382 }
383 llvm_unreachable("Unknown APValue kind!");
384 }
385
printPretty(raw_ostream & Out,ASTContext & Ctx,QualType Ty) const386 void APValue::printPretty(raw_ostream &Out, ASTContext &Ctx, QualType Ty) const{
387 switch (getKind()) {
388 case APValue::Uninitialized:
389 Out << "<uninitialized>";
390 return;
391 case APValue::Int:
392 if (Ty->isBooleanType())
393 Out << (getInt().getBoolValue() ? "true" : "false");
394 else
395 Out << getInt();
396 return;
397 case APValue::Float:
398 Out << GetApproxValue(getFloat());
399 return;
400 case APValue::Vector: {
401 Out << '{';
402 QualType ElemTy = Ty->getAs<VectorType>()->getElementType();
403 getVectorElt(0).printPretty(Out, Ctx, ElemTy);
404 for (unsigned i = 1; i != getVectorLength(); ++i) {
405 Out << ", ";
406 getVectorElt(i).printPretty(Out, Ctx, ElemTy);
407 }
408 Out << '}';
409 return;
410 }
411 case APValue::ComplexInt:
412 Out << getComplexIntReal() << "+" << getComplexIntImag() << "i";
413 return;
414 case APValue::ComplexFloat:
415 Out << GetApproxValue(getComplexFloatReal()) << "+"
416 << GetApproxValue(getComplexFloatImag()) << "i";
417 return;
418 case APValue::LValue: {
419 LValueBase Base = getLValueBase();
420 if (!Base) {
421 Out << "0";
422 return;
423 }
424
425 bool IsReference = Ty->isReferenceType();
426 QualType InnerTy
427 = IsReference ? Ty.getNonReferenceType() : Ty->getPointeeType();
428 if (InnerTy.isNull())
429 InnerTy = Ty;
430
431 if (!hasLValuePath()) {
432 // No lvalue path: just print the offset.
433 CharUnits O = getLValueOffset();
434 CharUnits S = Ctx.getTypeSizeInChars(InnerTy);
435 if (!O.isZero()) {
436 if (IsReference)
437 Out << "*(";
438 if (O % S) {
439 Out << "(char*)";
440 S = CharUnits::One();
441 }
442 Out << '&';
443 } else if (!IsReference)
444 Out << '&';
445
446 if (const ValueDecl *VD = Base.dyn_cast<const ValueDecl*>())
447 Out << *VD;
448 else {
449 assert(Base.get<const Expr *>() != nullptr &&
450 "Expecting non-null Expr");
451 Base.get<const Expr*>()->printPretty(Out, nullptr,
452 Ctx.getPrintingPolicy());
453 }
454
455 if (!O.isZero()) {
456 Out << " + " << (O / S);
457 if (IsReference)
458 Out << ')';
459 }
460 return;
461 }
462
463 // We have an lvalue path. Print it out nicely.
464 if (!IsReference)
465 Out << '&';
466 else if (isLValueOnePastTheEnd())
467 Out << "*(&";
468
469 QualType ElemTy;
470 if (const ValueDecl *VD = Base.dyn_cast<const ValueDecl*>()) {
471 Out << *VD;
472 ElemTy = VD->getType();
473 } else {
474 const Expr *E = Base.get<const Expr*>();
475 assert(E != nullptr && "Expecting non-null Expr");
476 E->printPretty(Out, nullptr, Ctx.getPrintingPolicy());
477 ElemTy = E->getType();
478 }
479
480 ArrayRef<LValuePathEntry> Path = getLValuePath();
481 const CXXRecordDecl *CastToBase = nullptr;
482 for (unsigned I = 0, N = Path.size(); I != N; ++I) {
483 if (ElemTy->getAs<RecordType>()) {
484 // The lvalue refers to a class type, so the next path entry is a base
485 // or member.
486 const Decl *BaseOrMember =
487 BaseOrMemberType::getFromOpaqueValue(Path[I].BaseOrMember).getPointer();
488 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(BaseOrMember)) {
489 CastToBase = RD;
490 ElemTy = Ctx.getRecordType(RD);
491 } else {
492 const ValueDecl *VD = cast<ValueDecl>(BaseOrMember);
493 Out << ".";
494 if (CastToBase)
495 Out << *CastToBase << "::";
496 Out << *VD;
497 ElemTy = VD->getType();
498 }
499 } else {
500 // The lvalue must refer to an array.
501 Out << '[' << Path[I].ArrayIndex << ']';
502 ElemTy = Ctx.getAsArrayType(ElemTy)->getElementType();
503 }
504 }
505
506 // Handle formatting of one-past-the-end lvalues.
507 if (isLValueOnePastTheEnd()) {
508 // FIXME: If CastToBase is non-0, we should prefix the output with
509 // "(CastToBase*)".
510 Out << " + 1";
511 if (IsReference)
512 Out << ')';
513 }
514 return;
515 }
516 case APValue::Array: {
517 const ArrayType *AT = Ctx.getAsArrayType(Ty);
518 QualType ElemTy = AT->getElementType();
519 Out << '{';
520 if (unsigned N = getArrayInitializedElts()) {
521 getArrayInitializedElt(0).printPretty(Out, Ctx, ElemTy);
522 for (unsigned I = 1; I != N; ++I) {
523 Out << ", ";
524 if (I == 10) {
525 // Avoid printing out the entire contents of large arrays.
526 Out << "...";
527 break;
528 }
529 getArrayInitializedElt(I).printPretty(Out, Ctx, ElemTy);
530 }
531 }
532 Out << '}';
533 return;
534 }
535 case APValue::Struct: {
536 Out << '{';
537 const RecordDecl *RD = Ty->getAs<RecordType>()->getDecl();
538 bool First = true;
539 if (unsigned N = getStructNumBases()) {
540 const CXXRecordDecl *CD = cast<CXXRecordDecl>(RD);
541 CXXRecordDecl::base_class_const_iterator BI = CD->bases_begin();
542 for (unsigned I = 0; I != N; ++I, ++BI) {
543 assert(BI != CD->bases_end());
544 if (!First)
545 Out << ", ";
546 getStructBase(I).printPretty(Out, Ctx, BI->getType());
547 First = false;
548 }
549 }
550 for (const auto *FI : RD->fields()) {
551 if (!First)
552 Out << ", ";
553 if (FI->isUnnamedBitfield()) continue;
554 getStructField(FI->getFieldIndex()).
555 printPretty(Out, Ctx, FI->getType());
556 First = false;
557 }
558 Out << '}';
559 return;
560 }
561 case APValue::Union:
562 Out << '{';
563 if (const FieldDecl *FD = getUnionField()) {
564 Out << "." << *FD << " = ";
565 getUnionValue().printPretty(Out, Ctx, FD->getType());
566 }
567 Out << '}';
568 return;
569 case APValue::MemberPointer:
570 // FIXME: This is not enough to unambiguously identify the member in a
571 // multiple-inheritance scenario.
572 if (const ValueDecl *VD = getMemberPointerDecl()) {
573 Out << '&' << *cast<CXXRecordDecl>(VD->getDeclContext()) << "::" << *VD;
574 return;
575 }
576 Out << "0";
577 return;
578 case APValue::AddrLabelDiff:
579 Out << "&&" << getAddrLabelDiffLHS()->getLabel()->getName();
580 Out << " - ";
581 Out << "&&" << getAddrLabelDiffRHS()->getLabel()->getName();
582 return;
583 }
584 llvm_unreachable("Unknown APValue kind!");
585 }
586
getAsString(ASTContext & Ctx,QualType Ty) const587 std::string APValue::getAsString(ASTContext &Ctx, QualType Ty) const {
588 std::string Result;
589 llvm::raw_string_ostream Out(Result);
590 printPretty(Out, Ctx, Ty);
591 Out.flush();
592 return Result;
593 }
594
getLValueBase() const595 const APValue::LValueBase APValue::getLValueBase() const {
596 assert(isLValue() && "Invalid accessor");
597 return ((const LV*)(const void*)Data.buffer)->Base;
598 }
599
isLValueOnePastTheEnd() const600 bool APValue::isLValueOnePastTheEnd() const {
601 assert(isLValue() && "Invalid accessor");
602 return ((const LV*)(const void*)Data.buffer)->IsOnePastTheEnd;
603 }
604
getLValueOffset()605 CharUnits &APValue::getLValueOffset() {
606 assert(isLValue() && "Invalid accessor");
607 return ((LV*)(void*)Data.buffer)->Offset;
608 }
609
hasLValuePath() const610 bool APValue::hasLValuePath() const {
611 assert(isLValue() && "Invalid accessor");
612 return ((const LV*)(const char*)Data.buffer)->hasPath();
613 }
614
getLValuePath() const615 ArrayRef<APValue::LValuePathEntry> APValue::getLValuePath() const {
616 assert(isLValue() && hasLValuePath() && "Invalid accessor");
617 const LV &LVal = *((const LV*)(const char*)Data.buffer);
618 return llvm::makeArrayRef(LVal.getPath(), LVal.PathLength);
619 }
620
getLValueCallIndex() const621 unsigned APValue::getLValueCallIndex() const {
622 assert(isLValue() && "Invalid accessor");
623 return ((const LV*)(const char*)Data.buffer)->Base.getCallIndex();
624 }
625
getLValueVersion() const626 unsigned APValue::getLValueVersion() const {
627 assert(isLValue() && "Invalid accessor");
628 return ((const LV*)(const char*)Data.buffer)->Base.getVersion();
629 }
630
isNullPointer() const631 bool APValue::isNullPointer() const {
632 assert(isLValue() && "Invalid usage");
633 return ((const LV*)(const char*)Data.buffer)->IsNullPtr;
634 }
635
setLValue(LValueBase B,const CharUnits & O,NoLValuePath,bool IsNullPtr)636 void APValue::setLValue(LValueBase B, const CharUnits &O, NoLValuePath,
637 bool IsNullPtr) {
638 assert(isLValue() && "Invalid accessor");
639 LV &LVal = *((LV*)(char*)Data.buffer);
640 LVal.Base = B;
641 LVal.IsOnePastTheEnd = false;
642 LVal.Offset = O;
643 LVal.resizePath((unsigned)-1);
644 LVal.IsNullPtr = IsNullPtr;
645 }
646
setLValue(LValueBase B,const CharUnits & O,ArrayRef<LValuePathEntry> Path,bool IsOnePastTheEnd,bool IsNullPtr)647 void APValue::setLValue(LValueBase B, const CharUnits &O,
648 ArrayRef<LValuePathEntry> Path, bool IsOnePastTheEnd,
649 bool IsNullPtr) {
650 assert(isLValue() && "Invalid accessor");
651 LV &LVal = *((LV*)(char*)Data.buffer);
652 LVal.Base = B;
653 LVal.IsOnePastTheEnd = IsOnePastTheEnd;
654 LVal.Offset = O;
655 LVal.resizePath(Path.size());
656 memcpy(LVal.getPath(), Path.data(), Path.size() * sizeof(LValuePathEntry));
657 LVal.IsNullPtr = IsNullPtr;
658 }
659
getMemberPointerDecl() const660 const ValueDecl *APValue::getMemberPointerDecl() const {
661 assert(isMemberPointer() && "Invalid accessor");
662 const MemberPointerData &MPD =
663 *((const MemberPointerData *)(const char *)Data.buffer);
664 return MPD.MemberAndIsDerivedMember.getPointer();
665 }
666
isMemberPointerToDerivedMember() const667 bool APValue::isMemberPointerToDerivedMember() const {
668 assert(isMemberPointer() && "Invalid accessor");
669 const MemberPointerData &MPD =
670 *((const MemberPointerData *)(const char *)Data.buffer);
671 return MPD.MemberAndIsDerivedMember.getInt();
672 }
673
getMemberPointerPath() const674 ArrayRef<const CXXRecordDecl*> APValue::getMemberPointerPath() const {
675 assert(isMemberPointer() && "Invalid accessor");
676 const MemberPointerData &MPD =
677 *((const MemberPointerData *)(const char *)Data.buffer);
678 return llvm::makeArrayRef(MPD.getPath(), MPD.PathLength);
679 }
680
MakeLValue()681 void APValue::MakeLValue() {
682 assert(isUninit() && "Bad state change");
683 static_assert(sizeof(LV) <= DataSize, "LV too big");
684 new ((void*)(char*)Data.buffer) LV();
685 Kind = LValue;
686 }
687
MakeArray(unsigned InitElts,unsigned Size)688 void APValue::MakeArray(unsigned InitElts, unsigned Size) {
689 assert(isUninit() && "Bad state change");
690 new ((void*)(char*)Data.buffer) Arr(InitElts, Size);
691 Kind = Array;
692 }
693
MakeMemberPointer(const ValueDecl * Member,bool IsDerivedMember,ArrayRef<const CXXRecordDecl * > Path)694 void APValue::MakeMemberPointer(const ValueDecl *Member, bool IsDerivedMember,
695 ArrayRef<const CXXRecordDecl*> Path) {
696 assert(isUninit() && "Bad state change");
697 MemberPointerData *MPD = new ((void*)(char*)Data.buffer) MemberPointerData;
698 Kind = MemberPointer;
699 MPD->MemberAndIsDerivedMember.setPointer(Member);
700 MPD->MemberAndIsDerivedMember.setInt(IsDerivedMember);
701 MPD->resizePath(Path.size());
702 memcpy(MPD->getPath(), Path.data(), Path.size()*sizeof(const CXXRecordDecl*));
703 }
704