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comparison clang/lib/AST/APValue.cpp @ 150:1d019706d866

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LLVM10
author anatofuz
date Thu, 13 Feb 2020 15:10:13 +0900
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147:c2174574ed3a 150:1d019706d866
1 //===--- APValue.cpp - Union class for APFloat/APSInt/Complex -------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements the APValue class.
10 //
11 //===----------------------------------------------------------------------===//
12
13 #include "clang/AST/APValue.h"
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/CharUnits.h"
16 #include "clang/AST/DeclCXX.h"
17 #include "clang/AST/Expr.h"
18 #include "clang/AST/Type.h"
19 #include "llvm/Support/ErrorHandling.h"
20 #include "llvm/Support/raw_ostream.h"
21 using namespace clang;
22
23 /// The identity of a type_info object depends on the canonical unqualified
24 /// type only.
25 TypeInfoLValue::TypeInfoLValue(const Type *T)
26 : T(T->getCanonicalTypeUnqualified().getTypePtr()) {}
27
28 void TypeInfoLValue::print(llvm::raw_ostream &Out,
29 const PrintingPolicy &Policy) const {
30 Out << "typeid(";
31 QualType(getType(), 0).print(Out, Policy);
32 Out << ")";
33 }
34
35 static_assert(
36 1 << llvm::PointerLikeTypeTraits<TypeInfoLValue>::NumLowBitsAvailable <=
37 alignof(Type),
38 "Type is insufficiently aligned");
39
40 APValue::LValueBase::LValueBase(const ValueDecl *P, unsigned I, unsigned V)
41 : Ptr(P), Local{I, V} {}
42 APValue::LValueBase::LValueBase(const Expr *P, unsigned I, unsigned V)
43 : Ptr(P), Local{I, V} {}
44
45 APValue::LValueBase APValue::LValueBase::getDynamicAlloc(DynamicAllocLValue LV,
46 QualType Type) {
47 LValueBase Base;
48 Base.Ptr = LV;
49 Base.DynamicAllocType = Type.getAsOpaquePtr();
50 return Base;
51 }
52
53 APValue::LValueBase APValue::LValueBase::getTypeInfo(TypeInfoLValue LV,
54 QualType TypeInfo) {
55 LValueBase Base;
56 Base.Ptr = LV;
57 Base.TypeInfoType = TypeInfo.getAsOpaquePtr();
58 return Base;
59 }
60
61 unsigned APValue::LValueBase::getCallIndex() const {
62 return (is<TypeInfoLValue>() || is<DynamicAllocLValue>()) ? 0
63 : Local.CallIndex;
64 }
65
66 unsigned APValue::LValueBase::getVersion() const {
67 return (is<TypeInfoLValue>() || is<DynamicAllocLValue>()) ? 0 : Local.Version;
68 }
69
70 QualType APValue::LValueBase::getTypeInfoType() const {
71 assert(is<TypeInfoLValue>() && "not a type_info lvalue");
72 return QualType::getFromOpaquePtr(TypeInfoType);
73 }
74
75 QualType APValue::LValueBase::getDynamicAllocType() const {
76 assert(is<DynamicAllocLValue>() && "not a dynamic allocation lvalue");
77 return QualType::getFromOpaquePtr(DynamicAllocType);
78 }
79
80 namespace clang {
81 bool operator==(const APValue::LValueBase &LHS,
82 const APValue::LValueBase &RHS) {
83 if (LHS.Ptr != RHS.Ptr)
84 return false;
85 if (LHS.is<TypeInfoLValue>())
86 return true;
87 return LHS.Local.CallIndex == RHS.Local.CallIndex &&
88 LHS.Local.Version == RHS.Local.Version;
89 }
90 }
91
92 namespace {
93 struct LVBase {
94 APValue::LValueBase Base;
95 CharUnits Offset;
96 unsigned PathLength;
97 bool IsNullPtr : 1;
98 bool IsOnePastTheEnd : 1;
99 };
100 }
101
102 void *APValue::LValueBase::getOpaqueValue() const {
103 return Ptr.getOpaqueValue();
104 }
105
106 bool APValue::LValueBase::isNull() const {
107 return Ptr.isNull();
108 }
109
110 APValue::LValueBase::operator bool () const {
111 return static_cast<bool>(Ptr);
112 }
113
114 clang::APValue::LValueBase
115 llvm::DenseMapInfo<clang::APValue::LValueBase>::getEmptyKey() {
116 return clang::APValue::LValueBase(
117 DenseMapInfo<const ValueDecl*>::getEmptyKey());
118 }
119
120 clang::APValue::LValueBase
121 llvm::DenseMapInfo<clang::APValue::LValueBase>::getTombstoneKey() {
122 return clang::APValue::LValueBase(
123 DenseMapInfo<const ValueDecl*>::getTombstoneKey());
124 }
125
126 namespace clang {
127 llvm::hash_code hash_value(const APValue::LValueBase &Base) {
128 if (Base.is<TypeInfoLValue>() || Base.is<DynamicAllocLValue>())
129 return llvm::hash_value(Base.getOpaqueValue());
130 return llvm::hash_combine(Base.getOpaqueValue(), Base.getCallIndex(),
131 Base.getVersion());
132 }
133 }
134
135 unsigned llvm::DenseMapInfo<clang::APValue::LValueBase>::getHashValue(
136 const clang::APValue::LValueBase &Base) {
137 return hash_value(Base);
138 }
139
140 bool llvm::DenseMapInfo<clang::APValue::LValueBase>::isEqual(
141 const clang::APValue::LValueBase &LHS,
142 const clang::APValue::LValueBase &RHS) {
143 return LHS == RHS;
144 }
145
146 struct APValue::LV : LVBase {
147 static const unsigned InlinePathSpace =
148 (DataSize - sizeof(LVBase)) / sizeof(LValuePathEntry);
149
150 /// Path - The sequence of base classes, fields and array indices to follow to
151 /// walk from Base to the subobject. When performing GCC-style folding, there
152 /// may not be such a path.
153 union {
154 LValuePathEntry Path[InlinePathSpace];
155 LValuePathEntry *PathPtr;
156 };
157
158 LV() { PathLength = (unsigned)-1; }
159 ~LV() { resizePath(0); }
160
161 void resizePath(unsigned Length) {
162 if (Length == PathLength)
163 return;
164 if (hasPathPtr())
165 delete [] PathPtr;
166 PathLength = Length;
167 if (hasPathPtr())
168 PathPtr = new LValuePathEntry[Length];
169 }
170
171 bool hasPath() const { return PathLength != (unsigned)-1; }
172 bool hasPathPtr() const { return hasPath() && PathLength > InlinePathSpace; }
173
174 LValuePathEntry *getPath() { return hasPathPtr() ? PathPtr : Path; }
175 const LValuePathEntry *getPath() const {
176 return hasPathPtr() ? PathPtr : Path;
177 }
178 };
179
180 namespace {
181 struct MemberPointerBase {
182 llvm::PointerIntPair<const ValueDecl*, 1, bool> MemberAndIsDerivedMember;
183 unsigned PathLength;
184 };
185 }
186
187 struct APValue::MemberPointerData : MemberPointerBase {
188 static const unsigned InlinePathSpace =
189 (DataSize - sizeof(MemberPointerBase)) / sizeof(const CXXRecordDecl*);
190 typedef const CXXRecordDecl *PathElem;
191 union {
192 PathElem Path[InlinePathSpace];
193 PathElem *PathPtr;
194 };
195
196 MemberPointerData() { PathLength = 0; }
197 ~MemberPointerData() { resizePath(0); }
198
199 void resizePath(unsigned Length) {
200 if (Length == PathLength)
201 return;
202 if (hasPathPtr())
203 delete [] PathPtr;
204 PathLength = Length;
205 if (hasPathPtr())
206 PathPtr = new PathElem[Length];
207 }
208
209 bool hasPathPtr() const { return PathLength > InlinePathSpace; }
210
211 PathElem *getPath() { return hasPathPtr() ? PathPtr : Path; }
212 const PathElem *getPath() const {
213 return hasPathPtr() ? PathPtr : Path;
214 }
215 };
216
217 // FIXME: Reduce the malloc traffic here.
218
219 APValue::Arr::Arr(unsigned NumElts, unsigned Size) :
220 Elts(new APValue[NumElts + (NumElts != Size ? 1 : 0)]),
221 NumElts(NumElts), ArrSize(Size) {}
222 APValue::Arr::~Arr() { delete [] Elts; }
223
224 APValue::StructData::StructData(unsigned NumBases, unsigned NumFields) :
225 Elts(new APValue[NumBases+NumFields]),
226 NumBases(NumBases), NumFields(NumFields) {}
227 APValue::StructData::~StructData() {
228 delete [] Elts;
229 }
230
231 APValue::UnionData::UnionData() : Field(nullptr), Value(new APValue) {}
232 APValue::UnionData::~UnionData () {
233 delete Value;
234 }
235
236 APValue::APValue(const APValue &RHS) : Kind(None) {
237 switch (RHS.getKind()) {
238 case None:
239 case Indeterminate:
240 Kind = RHS.getKind();
241 break;
242 case Int:
243 MakeInt();
244 setInt(RHS.getInt());
245 break;
246 case Float:
247 MakeFloat();
248 setFloat(RHS.getFloat());
249 break;
250 case FixedPoint: {
251 APFixedPoint FXCopy = RHS.getFixedPoint();
252 MakeFixedPoint(std::move(FXCopy));
253 break;
254 }
255 case Vector:
256 MakeVector();
257 setVector(((const Vec *)(const char *)RHS.Data.buffer)->Elts,
258 RHS.getVectorLength());
259 break;
260 case ComplexInt:
261 MakeComplexInt();
262 setComplexInt(RHS.getComplexIntReal(), RHS.getComplexIntImag());
263 break;
264 case ComplexFloat:
265 MakeComplexFloat();
266 setComplexFloat(RHS.getComplexFloatReal(), RHS.getComplexFloatImag());
267 break;
268 case LValue:
269 MakeLValue();
270 if (RHS.hasLValuePath())
271 setLValue(RHS.getLValueBase(), RHS.getLValueOffset(), RHS.getLValuePath(),
272 RHS.isLValueOnePastTheEnd(), RHS.isNullPointer());
273 else
274 setLValue(RHS.getLValueBase(), RHS.getLValueOffset(), NoLValuePath(),
275 RHS.isNullPointer());
276 break;
277 case Array:
278 MakeArray(RHS.getArrayInitializedElts(), RHS.getArraySize());
279 for (unsigned I = 0, N = RHS.getArrayInitializedElts(); I != N; ++I)
280 getArrayInitializedElt(I) = RHS.getArrayInitializedElt(I);
281 if (RHS.hasArrayFiller())
282 getArrayFiller() = RHS.getArrayFiller();
283 break;
284 case Struct:
285 MakeStruct(RHS.getStructNumBases(), RHS.getStructNumFields());
286 for (unsigned I = 0, N = RHS.getStructNumBases(); I != N; ++I)
287 getStructBase(I) = RHS.getStructBase(I);
288 for (unsigned I = 0, N = RHS.getStructNumFields(); I != N; ++I)
289 getStructField(I) = RHS.getStructField(I);
290 break;
291 case Union:
292 MakeUnion();
293 setUnion(RHS.getUnionField(), RHS.getUnionValue());
294 break;
295 case MemberPointer:
296 MakeMemberPointer(RHS.getMemberPointerDecl(),
297 RHS.isMemberPointerToDerivedMember(),
298 RHS.getMemberPointerPath());
299 break;
300 case AddrLabelDiff:
301 MakeAddrLabelDiff();
302 setAddrLabelDiff(RHS.getAddrLabelDiffLHS(), RHS.getAddrLabelDiffRHS());
303 break;
304 }
305 }
306
307 void APValue::DestroyDataAndMakeUninit() {
308 if (Kind == Int)
309 ((APSInt*)(char*)Data.buffer)->~APSInt();
310 else if (Kind == Float)
311 ((APFloat*)(char*)Data.buffer)->~APFloat();
312 else if (Kind == FixedPoint)
313 ((APFixedPoint *)(char *)Data.buffer)->~APFixedPoint();
314 else if (Kind == Vector)
315 ((Vec*)(char*)Data.buffer)->~Vec();
316 else if (Kind == ComplexInt)
317 ((ComplexAPSInt*)(char*)Data.buffer)->~ComplexAPSInt();
318 else if (Kind == ComplexFloat)
319 ((ComplexAPFloat*)(char*)Data.buffer)->~ComplexAPFloat();
320 else if (Kind == LValue)
321 ((LV*)(char*)Data.buffer)->~LV();
322 else if (Kind == Array)
323 ((Arr*)(char*)Data.buffer)->~Arr();
324 else if (Kind == Struct)
325 ((StructData*)(char*)Data.buffer)->~StructData();
326 else if (Kind == Union)
327 ((UnionData*)(char*)Data.buffer)->~UnionData();
328 else if (Kind == MemberPointer)
329 ((MemberPointerData*)(char*)Data.buffer)->~MemberPointerData();
330 else if (Kind == AddrLabelDiff)
331 ((AddrLabelDiffData*)(char*)Data.buffer)->~AddrLabelDiffData();
332 Kind = None;
333 }
334
335 bool APValue::needsCleanup() const {
336 switch (getKind()) {
337 case None:
338 case Indeterminate:
339 case AddrLabelDiff:
340 return false;
341 case Struct:
342 case Union:
343 case Array:
344 case Vector:
345 return true;
346 case Int:
347 return getInt().needsCleanup();
348 case Float:
349 return getFloat().needsCleanup();
350 case FixedPoint:
351 return getFixedPoint().getValue().needsCleanup();
352 case ComplexFloat:
353 assert(getComplexFloatImag().needsCleanup() ==
354 getComplexFloatReal().needsCleanup() &&
355 "In _Complex float types, real and imaginary values always have the "
356 "same size.");
357 return getComplexFloatReal().needsCleanup();
358 case ComplexInt:
359 assert(getComplexIntImag().needsCleanup() ==
360 getComplexIntReal().needsCleanup() &&
361 "In _Complex int types, real and imaginary values must have the "
362 "same size.");
363 return getComplexIntReal().needsCleanup();
364 case LValue:
365 return reinterpret_cast<const LV *>(Data.buffer)->hasPathPtr();
366 case MemberPointer:
367 return reinterpret_cast<const MemberPointerData *>(Data.buffer)
368 ->hasPathPtr();
369 }
370 llvm_unreachable("Unknown APValue kind!");
371 }
372
373 void APValue::swap(APValue &RHS) {
374 std::swap(Kind, RHS.Kind);
375 char TmpData[DataSize];
376 memcpy(TmpData, Data.buffer, DataSize);
377 memcpy(Data.buffer, RHS.Data.buffer, DataSize);
378 memcpy(RHS.Data.buffer, TmpData, DataSize);
379 }
380
381 LLVM_DUMP_METHOD void APValue::dump() const {
382 dump(llvm::errs());
383 llvm::errs() << '\n';
384 }
385
386 static double GetApproxValue(const llvm::APFloat &F) {
387 llvm::APFloat V = F;
388 bool ignored;
389 V.convert(llvm::APFloat::IEEEdouble(), llvm::APFloat::rmNearestTiesToEven,
390 &ignored);
391 return V.convertToDouble();
392 }
393
394 void APValue::dump(raw_ostream &OS) const {
395 switch (getKind()) {
396 case None:
397 OS << "None";
398 return;
399 case Indeterminate:
400 OS << "Indeterminate";
401 return;
402 case Int:
403 OS << "Int: " << getInt();
404 return;
405 case Float:
406 OS << "Float: " << GetApproxValue(getFloat());
407 return;
408 case FixedPoint:
409 OS << "FixedPoint : " << getFixedPoint();
410 return;
411 case Vector:
412 OS << "Vector: ";
413 getVectorElt(0).dump(OS);
414 for (unsigned i = 1; i != getVectorLength(); ++i) {
415 OS << ", ";
416 getVectorElt(i).dump(OS);
417 }
418 return;
419 case ComplexInt:
420 OS << "ComplexInt: " << getComplexIntReal() << ", " << getComplexIntImag();
421 return;
422 case ComplexFloat:
423 OS << "ComplexFloat: " << GetApproxValue(getComplexFloatReal())
424 << ", " << GetApproxValue(getComplexFloatImag());
425 return;
426 case LValue:
427 OS << "LValue: <todo>";
428 return;
429 case Array:
430 OS << "Array: ";
431 for (unsigned I = 0, N = getArrayInitializedElts(); I != N; ++I) {
432 getArrayInitializedElt(I).dump(OS);
433 if (I != getArraySize() - 1) OS << ", ";
434 }
435 if (hasArrayFiller()) {
436 OS << getArraySize() - getArrayInitializedElts() << " x ";
437 getArrayFiller().dump(OS);
438 }
439 return;
440 case Struct:
441 OS << "Struct ";
442 if (unsigned N = getStructNumBases()) {
443 OS << " bases: ";
444 getStructBase(0).dump(OS);
445 for (unsigned I = 1; I != N; ++I) {
446 OS << ", ";
447 getStructBase(I).dump(OS);
448 }
449 }
450 if (unsigned N = getStructNumFields()) {
451 OS << " fields: ";
452 getStructField(0).dump(OS);
453 for (unsigned I = 1; I != N; ++I) {
454 OS << ", ";
455 getStructField(I).dump(OS);
456 }
457 }
458 return;
459 case Union:
460 OS << "Union: ";
461 getUnionValue().dump(OS);
462 return;
463 case MemberPointer:
464 OS << "MemberPointer: <todo>";
465 return;
466 case AddrLabelDiff:
467 OS << "AddrLabelDiff: <todo>";
468 return;
469 }
470 llvm_unreachable("Unknown APValue kind!");
471 }
472
473 void APValue::printPretty(raw_ostream &Out, const ASTContext &Ctx,
474 QualType Ty) const {
475 switch (getKind()) {
476 case APValue::None:
477 Out << "<out of lifetime>";
478 return;
479 case APValue::Indeterminate:
480 Out << "<uninitialized>";
481 return;
482 case APValue::Int:
483 if (Ty->isBooleanType())
484 Out << (getInt().getBoolValue() ? "true" : "false");
485 else
486 Out << getInt();
487 return;
488 case APValue::Float:
489 Out << GetApproxValue(getFloat());
490 return;
491 case APValue::FixedPoint:
492 Out << getFixedPoint();
493 return;
494 case APValue::Vector: {
495 Out << '{';
496 QualType ElemTy = Ty->castAs<VectorType>()->getElementType();
497 getVectorElt(0).printPretty(Out, Ctx, ElemTy);
498 for (unsigned i = 1; i != getVectorLength(); ++i) {
499 Out << ", ";
500 getVectorElt(i).printPretty(Out, Ctx, ElemTy);
501 }
502 Out << '}';
503 return;
504 }
505 case APValue::ComplexInt:
506 Out << getComplexIntReal() << "+" << getComplexIntImag() << "i";
507 return;
508 case APValue::ComplexFloat:
509 Out << GetApproxValue(getComplexFloatReal()) << "+"
510 << GetApproxValue(getComplexFloatImag()) << "i";
511 return;
512 case APValue::LValue: {
513 bool IsReference = Ty->isReferenceType();
514 QualType InnerTy
515 = IsReference ? Ty.getNonReferenceType() : Ty->getPointeeType();
516 if (InnerTy.isNull())
517 InnerTy = Ty;
518
519 LValueBase Base = getLValueBase();
520 if (!Base) {
521 if (isNullPointer()) {
522 Out << (Ctx.getLangOpts().CPlusPlus11 ? "nullptr" : "0");
523 } else if (IsReference) {
524 Out << "*(" << InnerTy.stream(Ctx.getPrintingPolicy()) << "*)"
525 << getLValueOffset().getQuantity();
526 } else {
527 Out << "(" << Ty.stream(Ctx.getPrintingPolicy()) << ")"
528 << getLValueOffset().getQuantity();
529 }
530 return;
531 }
532
533 if (!hasLValuePath()) {
534 // No lvalue path: just print the offset.
535 CharUnits O = getLValueOffset();
536 CharUnits S = Ctx.getTypeSizeInChars(InnerTy);
537 if (!O.isZero()) {
538 if (IsReference)
539 Out << "*(";
540 if (O % S) {
541 Out << "(char*)";
542 S = CharUnits::One();
543 }
544 Out << '&';
545 } else if (!IsReference) {
546 Out << '&';
547 }
548
549 if (const ValueDecl *VD = Base.dyn_cast<const ValueDecl*>())
550 Out << *VD;
551 else if (TypeInfoLValue TI = Base.dyn_cast<TypeInfoLValue>()) {
552 TI.print(Out, Ctx.getPrintingPolicy());
553 } else if (DynamicAllocLValue DA = Base.dyn_cast<DynamicAllocLValue>()) {
554 Out << "{*new "
555 << Base.getDynamicAllocType().stream(Ctx.getPrintingPolicy()) << "#"
556 << DA.getIndex() << "}";
557 } else {
558 assert(Base.get<const Expr *>() != nullptr &&
559 "Expecting non-null Expr");
560 Base.get<const Expr*>()->printPretty(Out, nullptr,
561 Ctx.getPrintingPolicy());
562 }
563
564 if (!O.isZero()) {
565 Out << " + " << (O / S);
566 if (IsReference)
567 Out << ')';
568 }
569 return;
570 }
571
572 // We have an lvalue path. Print it out nicely.
573 if (!IsReference)
574 Out << '&';
575 else if (isLValueOnePastTheEnd())
576 Out << "*(&";
577
578 QualType ElemTy;
579 if (const ValueDecl *VD = Base.dyn_cast<const ValueDecl*>()) {
580 Out << *VD;
581 ElemTy = VD->getType();
582 } else if (TypeInfoLValue TI = Base.dyn_cast<TypeInfoLValue>()) {
583 TI.print(Out, Ctx.getPrintingPolicy());
584 ElemTy = Base.getTypeInfoType();
585 } else if (DynamicAllocLValue DA = Base.dyn_cast<DynamicAllocLValue>()) {
586 Out << "{*new "
587 << Base.getDynamicAllocType().stream(Ctx.getPrintingPolicy()) << "#"
588 << DA.getIndex() << "}";
589 ElemTy = Base.getDynamicAllocType();
590 } else {
591 const Expr *E = Base.get<const Expr*>();
592 assert(E != nullptr && "Expecting non-null Expr");
593 E->printPretty(Out, nullptr, Ctx.getPrintingPolicy());
594 // FIXME: This is wrong if E is a MaterializeTemporaryExpr with an lvalue
595 // adjustment.
596 ElemTy = E->getType();
597 }
598
599 ArrayRef<LValuePathEntry> Path = getLValuePath();
600 const CXXRecordDecl *CastToBase = nullptr;
601 for (unsigned I = 0, N = Path.size(); I != N; ++I) {
602 if (ElemTy->getAs<RecordType>()) {
603 // The lvalue refers to a class type, so the next path entry is a base
604 // or member.
605 const Decl *BaseOrMember = Path[I].getAsBaseOrMember().getPointer();
606 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(BaseOrMember)) {
607 CastToBase = RD;
608 ElemTy = Ctx.getRecordType(RD);
609 } else {
610 const ValueDecl *VD = cast<ValueDecl>(BaseOrMember);
611 Out << ".";
612 if (CastToBase)
613 Out << *CastToBase << "::";
614 Out << *VD;
615 ElemTy = VD->getType();
616 }
617 } else {
618 // The lvalue must refer to an array.
619 Out << '[' << Path[I].getAsArrayIndex() << ']';
620 ElemTy = Ctx.getAsArrayType(ElemTy)->getElementType();
621 }
622 }
623
624 // Handle formatting of one-past-the-end lvalues.
625 if (isLValueOnePastTheEnd()) {
626 // FIXME: If CastToBase is non-0, we should prefix the output with
627 // "(CastToBase*)".
628 Out << " + 1";
629 if (IsReference)
630 Out << ')';
631 }
632 return;
633 }
634 case APValue::Array: {
635 const ArrayType *AT = Ctx.getAsArrayType(Ty);
636 QualType ElemTy = AT->getElementType();
637 Out << '{';
638 if (unsigned N = getArrayInitializedElts()) {
639 getArrayInitializedElt(0).printPretty(Out, Ctx, ElemTy);
640 for (unsigned I = 1; I != N; ++I) {
641 Out << ", ";
642 if (I == 10) {
643 // Avoid printing out the entire contents of large arrays.
644 Out << "...";
645 break;
646 }
647 getArrayInitializedElt(I).printPretty(Out, Ctx, ElemTy);
648 }
649 }
650 Out << '}';
651 return;
652 }
653 case APValue::Struct: {
654 Out << '{';
655 const RecordDecl *RD = Ty->castAs<RecordType>()->getDecl();
656 bool First = true;
657 if (unsigned N = getStructNumBases()) {
658 const CXXRecordDecl *CD = cast<CXXRecordDecl>(RD);
659 CXXRecordDecl::base_class_const_iterator BI = CD->bases_begin();
660 for (unsigned I = 0; I != N; ++I, ++BI) {
661 assert(BI != CD->bases_end());
662 if (!First)
663 Out << ", ";
664 getStructBase(I).printPretty(Out, Ctx, BI->getType());
665 First = false;
666 }
667 }
668 for (const auto *FI : RD->fields()) {
669 if (!First)
670 Out << ", ";
671 if (FI->isUnnamedBitfield()) continue;
672 getStructField(FI->getFieldIndex()).
673 printPretty(Out, Ctx, FI->getType());
674 First = false;
675 }
676 Out << '}';
677 return;
678 }
679 case APValue::Union:
680 Out << '{';
681 if (const FieldDecl *FD = getUnionField()) {
682 Out << "." << *FD << " = ";
683 getUnionValue().printPretty(Out, Ctx, FD->getType());
684 }
685 Out << '}';
686 return;
687 case APValue::MemberPointer:
688 // FIXME: This is not enough to unambiguously identify the member in a
689 // multiple-inheritance scenario.
690 if (const ValueDecl *VD = getMemberPointerDecl()) {
691 Out << '&' << *cast<CXXRecordDecl>(VD->getDeclContext()) << "::" << *VD;
692 return;
693 }
694 Out << "0";
695 return;
696 case APValue::AddrLabelDiff:
697 Out << "&&" << getAddrLabelDiffLHS()->getLabel()->getName();
698 Out << " - ";
699 Out << "&&" << getAddrLabelDiffRHS()->getLabel()->getName();
700 return;
701 }
702 llvm_unreachable("Unknown APValue kind!");
703 }
704
705 std::string APValue::getAsString(const ASTContext &Ctx, QualType Ty) const {
706 std::string Result;
707 llvm::raw_string_ostream Out(Result);
708 printPretty(Out, Ctx, Ty);
709 Out.flush();
710 return Result;
711 }
712
713 bool APValue::toIntegralConstant(APSInt &Result, QualType SrcTy,
714 const ASTContext &Ctx) const {
715 if (isInt()) {
716 Result = getInt();
717 return true;
718 }
719
720 if (isLValue() && isNullPointer()) {
721 Result = Ctx.MakeIntValue(Ctx.getTargetNullPointerValue(SrcTy), SrcTy);
722 return true;
723 }
724
725 if (isLValue() && !getLValueBase()) {
726 Result = Ctx.MakeIntValue(getLValueOffset().getQuantity(), SrcTy);
727 return true;
728 }
729
730 return false;
731 }
732
733 const APValue::LValueBase APValue::getLValueBase() const {
734 assert(isLValue() && "Invalid accessor");
735 return ((const LV*)(const void*)Data.buffer)->Base;
736 }
737
738 bool APValue::isLValueOnePastTheEnd() const {
739 assert(isLValue() && "Invalid accessor");
740 return ((const LV*)(const void*)Data.buffer)->IsOnePastTheEnd;
741 }
742
743 CharUnits &APValue::getLValueOffset() {
744 assert(isLValue() && "Invalid accessor");
745 return ((LV*)(void*)Data.buffer)->Offset;
746 }
747
748 bool APValue::hasLValuePath() const {
749 assert(isLValue() && "Invalid accessor");
750 return ((const LV*)(const char*)Data.buffer)->hasPath();
751 }
752
753 ArrayRef<APValue::LValuePathEntry> APValue::getLValuePath() const {
754 assert(isLValue() && hasLValuePath() && "Invalid accessor");
755 const LV &LVal = *((const LV*)(const char*)Data.buffer);
756 return llvm::makeArrayRef(LVal.getPath(), LVal.PathLength);
757 }
758
759 unsigned APValue::getLValueCallIndex() const {
760 assert(isLValue() && "Invalid accessor");
761 return ((const LV*)(const char*)Data.buffer)->Base.getCallIndex();
762 }
763
764 unsigned APValue::getLValueVersion() const {
765 assert(isLValue() && "Invalid accessor");
766 return ((const LV*)(const char*)Data.buffer)->Base.getVersion();
767 }
768
769 bool APValue::isNullPointer() const {
770 assert(isLValue() && "Invalid usage");
771 return ((const LV*)(const char*)Data.buffer)->IsNullPtr;
772 }
773
774 void APValue::setLValue(LValueBase B, const CharUnits &O, NoLValuePath,
775 bool IsNullPtr) {
776 assert(isLValue() && "Invalid accessor");
777 LV &LVal = *((LV*)(char*)Data.buffer);
778 LVal.Base = B;
779 LVal.IsOnePastTheEnd = false;
780 LVal.Offset = O;
781 LVal.resizePath((unsigned)-1);
782 LVal.IsNullPtr = IsNullPtr;
783 }
784
785 void APValue::setLValue(LValueBase B, const CharUnits &O,
786 ArrayRef<LValuePathEntry> Path, bool IsOnePastTheEnd,
787 bool IsNullPtr) {
788 assert(isLValue() && "Invalid accessor");
789 LV &LVal = *((LV*)(char*)Data.buffer);
790 LVal.Base = B;
791 LVal.IsOnePastTheEnd = IsOnePastTheEnd;
792 LVal.Offset = O;
793 LVal.resizePath(Path.size());
794 memcpy(LVal.getPath(), Path.data(), Path.size() * sizeof(LValuePathEntry));
795 LVal.IsNullPtr = IsNullPtr;
796 }
797
798 const ValueDecl *APValue::getMemberPointerDecl() const {
799 assert(isMemberPointer() && "Invalid accessor");
800 const MemberPointerData &MPD =
801 *((const MemberPointerData *)(const char *)Data.buffer);
802 return MPD.MemberAndIsDerivedMember.getPointer();
803 }
804
805 bool APValue::isMemberPointerToDerivedMember() const {
806 assert(isMemberPointer() && "Invalid accessor");
807 const MemberPointerData &MPD =
808 *((const MemberPointerData *)(const char *)Data.buffer);
809 return MPD.MemberAndIsDerivedMember.getInt();
810 }
811
812 ArrayRef<const CXXRecordDecl*> APValue::getMemberPointerPath() const {
813 assert(isMemberPointer() && "Invalid accessor");
814 const MemberPointerData &MPD =
815 *((const MemberPointerData *)(const char *)Data.buffer);
816 return llvm::makeArrayRef(MPD.getPath(), MPD.PathLength);
817 }
818
819 void APValue::MakeLValue() {
820 assert(isAbsent() && "Bad state change");
821 static_assert(sizeof(LV) <= DataSize, "LV too big");
822 new ((void*)(char*)Data.buffer) LV();
823 Kind = LValue;
824 }
825
826 void APValue::MakeArray(unsigned InitElts, unsigned Size) {
827 assert(isAbsent() && "Bad state change");
828 new ((void*)(char*)Data.buffer) Arr(InitElts, Size);
829 Kind = Array;
830 }
831
832 void APValue::MakeMemberPointer(const ValueDecl *Member, bool IsDerivedMember,
833 ArrayRef<const CXXRecordDecl*> Path) {
834 assert(isAbsent() && "Bad state change");
835 MemberPointerData *MPD = new ((void*)(char*)Data.buffer) MemberPointerData;
836 Kind = MemberPointer;
837 MPD->MemberAndIsDerivedMember.setPointer(Member);
838 MPD->MemberAndIsDerivedMember.setInt(IsDerivedMember);
839 MPD->resizePath(Path.size());
840 memcpy(MPD->getPath(), Path.data(), Path.size()*sizeof(const CXXRecordDecl*));
841 }