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 bool IsReference = Ty->isReferenceType();
420 QualType InnerTy
421 = IsReference ? Ty.getNonReferenceType() : Ty->getPointeeType();
422 if (InnerTy.isNull())
423 InnerTy = Ty;
424
425 LValueBase Base = getLValueBase();
426 if (!Base) {
427 if (isNullPointer()) {
428 Out << (Ctx.getLangOpts().CPlusPlus11 ? "nullptr" : "0");
429 } else if (IsReference) {
430 Out << "*(" << InnerTy.stream(Ctx.getPrintingPolicy()) << "*)"
431 << getLValueOffset().getQuantity();
432 } else {
433 Out << "(" << Ty.stream(Ctx.getPrintingPolicy()) << ")"
434 << getLValueOffset().getQuantity();
435 }
436 return;
437 }
438
439 if (!hasLValuePath()) {
440 // No lvalue path: just print the offset.
441 CharUnits O = getLValueOffset();
442 CharUnits S = Ctx.getTypeSizeInChars(InnerTy);
443 if (!O.isZero()) {
444 if (IsReference)
445 Out << "*(";
446 if (O % S) {
447 Out << "(char*)";
448 S = CharUnits::One();
449 }
450 Out << '&';
451 } else if (!IsReference)
452 Out << '&';
453
454 if (const ValueDecl *VD = Base.dyn_cast<const ValueDecl*>())
455 Out << *VD;
456 else {
457 assert(Base.get<const Expr *>() != nullptr &&
458 "Expecting non-null Expr");
459 Base.get<const Expr*>()->printPretty(Out, nullptr,
460 Ctx.getPrintingPolicy());
461 }
462
463 if (!O.isZero()) {
464 Out << " + " << (O / S);
465 if (IsReference)
466 Out << ')';
467 }
468 return;
469 }
470
471 // We have an lvalue path. Print it out nicely.
472 if (!IsReference)
473 Out << '&';
474 else if (isLValueOnePastTheEnd())
475 Out << "*(&";
476
477 QualType ElemTy;
478 if (const ValueDecl *VD = Base.dyn_cast<const ValueDecl*>()) {
479 Out << *VD;
480 ElemTy = VD->getType();
481 } else {
482 const Expr *E = Base.get<const Expr*>();
483 assert(E != nullptr && "Expecting non-null Expr");
484 E->printPretty(Out, nullptr, Ctx.getPrintingPolicy());
485 ElemTy = E->getType();
486 }
487
488 ArrayRef<LValuePathEntry> Path = getLValuePath();
489 const CXXRecordDecl *CastToBase = nullptr;
490 for (unsigned I = 0, N = Path.size(); I != N; ++I) {
491 if (ElemTy->getAs<RecordType>()) {
492 // The lvalue refers to a class type, so the next path entry is a base
493 // or member.
494 const Decl *BaseOrMember =
495 BaseOrMemberType::getFromOpaqueValue(Path[I].BaseOrMember).getPointer();
496 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(BaseOrMember)) {
497 CastToBase = RD;
498 ElemTy = Ctx.getRecordType(RD);
499 } else {
500 const ValueDecl *VD = cast<ValueDecl>(BaseOrMember);
501 Out << ".";
502 if (CastToBase)
503 Out << *CastToBase << "::";
504 Out << *VD;
505 ElemTy = VD->getType();
506 }
507 } else {
508 // The lvalue must refer to an array.
509 Out << '[' << Path[I].ArrayIndex << ']';
510 ElemTy = Ctx.getAsArrayType(ElemTy)->getElementType();
511 }
512 }
513
514 // Handle formatting of one-past-the-end lvalues.
515 if (isLValueOnePastTheEnd()) {
516 // FIXME: If CastToBase is non-0, we should prefix the output with
517 // "(CastToBase*)".
518 Out << " + 1";
519 if (IsReference)
520 Out << ')';
521 }
522 return;
523 }
524 case APValue::Array: {
525 const ArrayType *AT = Ctx.getAsArrayType(Ty);
526 QualType ElemTy = AT->getElementType();
527 Out << '{';
528 if (unsigned N = getArrayInitializedElts()) {
529 getArrayInitializedElt(0).printPretty(Out, Ctx, ElemTy);
530 for (unsigned I = 1; I != N; ++I) {
531 Out << ", ";
532 if (I == 10) {
533 // Avoid printing out the entire contents of large arrays.
534 Out << "...";
535 break;
536 }
537 getArrayInitializedElt(I).printPretty(Out, Ctx, ElemTy);
538 }
539 }
540 Out << '}';
541 return;
542 }
543 case APValue::Struct: {
544 Out << '{';
545 const RecordDecl *RD = Ty->getAs<RecordType>()->getDecl();
546 bool First = true;
547 if (unsigned N = getStructNumBases()) {
548 const CXXRecordDecl *CD = cast<CXXRecordDecl>(RD);
549 CXXRecordDecl::base_class_const_iterator BI = CD->bases_begin();
550 for (unsigned I = 0; I != N; ++I, ++BI) {
551 assert(BI != CD->bases_end());
552 if (!First)
553 Out << ", ";
554 getStructBase(I).printPretty(Out, Ctx, BI->getType());
555 First = false;
556 }
557 }
558 for (const auto *FI : RD->fields()) {
559 if (!First)
560 Out << ", ";
561 if (FI->isUnnamedBitfield()) continue;
562 getStructField(FI->getFieldIndex()).
563 printPretty(Out, Ctx, FI->getType());
564 First = false;
565 }
566 Out << '}';
567 return;
568 }
569 case APValue::Union:
570 Out << '{';
571 if (const FieldDecl *FD = getUnionField()) {
572 Out << "." << *FD << " = ";
573 getUnionValue().printPretty(Out, Ctx, FD->getType());
574 }
575 Out << '}';
576 return;
577 case APValue::MemberPointer:
578 // FIXME: This is not enough to unambiguously identify the member in a
579 // multiple-inheritance scenario.
580 if (const ValueDecl *VD = getMemberPointerDecl()) {
581 Out << '&' << *cast<CXXRecordDecl>(VD->getDeclContext()) << "::" << *VD;
582 return;
583 }
584 Out << "0";
585 return;
586 case APValue::AddrLabelDiff:
587 Out << "&&" << getAddrLabelDiffLHS()->getLabel()->getName();
588 Out << " - ";
589 Out << "&&" << getAddrLabelDiffRHS()->getLabel()->getName();
590 return;
591 }
592 llvm_unreachable("Unknown APValue kind!");
593 }
594
getAsString(ASTContext & Ctx,QualType Ty) const595 std::string APValue::getAsString(ASTContext &Ctx, QualType Ty) const {
596 std::string Result;
597 llvm::raw_string_ostream Out(Result);
598 printPretty(Out, Ctx, Ty);
599 Out.flush();
600 return Result;
601 }
602
toIntegralConstant(APSInt & Result,QualType SrcTy,const ASTContext & Ctx) const603 bool APValue::toIntegralConstant(APSInt &Result, QualType SrcTy,
604 const ASTContext &Ctx) const {
605 if (isInt()) {
606 Result = getInt();
607 return true;
608 }
609
610 if (isLValue() && isNullPointer()) {
611 Result = Ctx.MakeIntValue(Ctx.getTargetNullPointerValue(SrcTy), SrcTy);
612 return true;
613 }
614
615 if (isLValue() && !getLValueBase()) {
616 Result = Ctx.MakeIntValue(getLValueOffset().getQuantity(), SrcTy);
617 return true;
618 }
619
620 return false;
621 }
622
getLValueBase() const623 const APValue::LValueBase APValue::getLValueBase() const {
624 assert(isLValue() && "Invalid accessor");
625 return ((const LV*)(const void*)Data.buffer)->Base;
626 }
627
isLValueOnePastTheEnd() const628 bool APValue::isLValueOnePastTheEnd() const {
629 assert(isLValue() && "Invalid accessor");
630 return ((const LV*)(const void*)Data.buffer)->IsOnePastTheEnd;
631 }
632
getLValueOffset()633 CharUnits &APValue::getLValueOffset() {
634 assert(isLValue() && "Invalid accessor");
635 return ((LV*)(void*)Data.buffer)->Offset;
636 }
637
hasLValuePath() const638 bool APValue::hasLValuePath() const {
639 assert(isLValue() && "Invalid accessor");
640 return ((const LV*)(const char*)Data.buffer)->hasPath();
641 }
642
getLValuePath() const643 ArrayRef<APValue::LValuePathEntry> APValue::getLValuePath() const {
644 assert(isLValue() && hasLValuePath() && "Invalid accessor");
645 const LV &LVal = *((const LV*)(const char*)Data.buffer);
646 return llvm::makeArrayRef(LVal.getPath(), LVal.PathLength);
647 }
648
getLValueCallIndex() const649 unsigned APValue::getLValueCallIndex() const {
650 assert(isLValue() && "Invalid accessor");
651 return ((const LV*)(const char*)Data.buffer)->Base.getCallIndex();
652 }
653
getLValueVersion() const654 unsigned APValue::getLValueVersion() const {
655 assert(isLValue() && "Invalid accessor");
656 return ((const LV*)(const char*)Data.buffer)->Base.getVersion();
657 }
658
isNullPointer() const659 bool APValue::isNullPointer() const {
660 assert(isLValue() && "Invalid usage");
661 return ((const LV*)(const char*)Data.buffer)->IsNullPtr;
662 }
663
setLValue(LValueBase B,const CharUnits & O,NoLValuePath,bool IsNullPtr)664 void APValue::setLValue(LValueBase B, const CharUnits &O, NoLValuePath,
665 bool IsNullPtr) {
666 assert(isLValue() && "Invalid accessor");
667 LV &LVal = *((LV*)(char*)Data.buffer);
668 LVal.Base = B;
669 LVal.IsOnePastTheEnd = false;
670 LVal.Offset = O;
671 LVal.resizePath((unsigned)-1);
672 LVal.IsNullPtr = IsNullPtr;
673 }
674
setLValue(LValueBase B,const CharUnits & O,ArrayRef<LValuePathEntry> Path,bool IsOnePastTheEnd,bool IsNullPtr)675 void APValue::setLValue(LValueBase B, const CharUnits &O,
676 ArrayRef<LValuePathEntry> Path, bool IsOnePastTheEnd,
677 bool IsNullPtr) {
678 assert(isLValue() && "Invalid accessor");
679 LV &LVal = *((LV*)(char*)Data.buffer);
680 LVal.Base = B;
681 LVal.IsOnePastTheEnd = IsOnePastTheEnd;
682 LVal.Offset = O;
683 LVal.resizePath(Path.size());
684 memcpy(LVal.getPath(), Path.data(), Path.size() * sizeof(LValuePathEntry));
685 LVal.IsNullPtr = IsNullPtr;
686 }
687
getMemberPointerDecl() const688 const ValueDecl *APValue::getMemberPointerDecl() const {
689 assert(isMemberPointer() && "Invalid accessor");
690 const MemberPointerData &MPD =
691 *((const MemberPointerData *)(const char *)Data.buffer);
692 return MPD.MemberAndIsDerivedMember.getPointer();
693 }
694
isMemberPointerToDerivedMember() const695 bool APValue::isMemberPointerToDerivedMember() const {
696 assert(isMemberPointer() && "Invalid accessor");
697 const MemberPointerData &MPD =
698 *((const MemberPointerData *)(const char *)Data.buffer);
699 return MPD.MemberAndIsDerivedMember.getInt();
700 }
701
getMemberPointerPath() const702 ArrayRef<const CXXRecordDecl*> APValue::getMemberPointerPath() const {
703 assert(isMemberPointer() && "Invalid accessor");
704 const MemberPointerData &MPD =
705 *((const MemberPointerData *)(const char *)Data.buffer);
706 return llvm::makeArrayRef(MPD.getPath(), MPD.PathLength);
707 }
708
MakeLValue()709 void APValue::MakeLValue() {
710 assert(isUninit() && "Bad state change");
711 static_assert(sizeof(LV) <= DataSize, "LV too big");
712 new ((void*)(char*)Data.buffer) LV();
713 Kind = LValue;
714 }
715
MakeArray(unsigned InitElts,unsigned Size)716 void APValue::MakeArray(unsigned InitElts, unsigned Size) {
717 assert(isUninit() && "Bad state change");
718 new ((void*)(char*)Data.buffer) Arr(InitElts, Size);
719 Kind = Array;
720 }
721
MakeMemberPointer(const ValueDecl * Member,bool IsDerivedMember,ArrayRef<const CXXRecordDecl * > Path)722 void APValue::MakeMemberPointer(const ValueDecl *Member, bool IsDerivedMember,
723 ArrayRef<const CXXRecordDecl*> Path) {
724 assert(isUninit() && "Bad state change");
725 MemberPointerData *MPD = new ((void*)(char*)Data.buffer) MemberPointerData;
726 Kind = MemberPointer;
727 MPD->MemberAndIsDerivedMember.setPointer(Member);
728 MPD->MemberAndIsDerivedMember.setInt(IsDerivedMember);
729 MPD->resizePath(Path.size());
730 memcpy(MPD->getPath(), Path.data(), Path.size()*sizeof(const CXXRecordDecl*));
731 }
732