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-rw-r--r--clang/lib/AST/APValue.cpp841
1 files changed, 841 insertions, 0 deletions
diff --git a/clang/lib/AST/APValue.cpp b/clang/lib/AST/APValue.cpp
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index 000000000000..50f8d05dacb4
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+++ b/clang/lib/AST/APValue.cpp
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+//===--- APValue.cpp - Union class for APFloat/APSInt/Complex -------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the APValue class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/AST/APValue.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/CharUnits.h"
+#include "clang/AST/DeclCXX.h"
+#include "clang/AST/Expr.h"
+#include "clang/AST/Type.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace clang;
+
+/// The identity of a type_info object depends on the canonical unqualified
+/// type only.
+TypeInfoLValue::TypeInfoLValue(const Type *T)
+ : T(T->getCanonicalTypeUnqualified().getTypePtr()) {}
+
+void TypeInfoLValue::print(llvm::raw_ostream &Out,
+ const PrintingPolicy &Policy) const {
+ Out << "typeid(";
+ QualType(getType(), 0).print(Out, Policy);
+ Out << ")";
+}
+
+static_assert(
+ 1 << llvm::PointerLikeTypeTraits<TypeInfoLValue>::NumLowBitsAvailable <=
+ alignof(Type),
+ "Type is insufficiently aligned");
+
+APValue::LValueBase::LValueBase(const ValueDecl *P, unsigned I, unsigned V)
+ : Ptr(P), Local{I, V} {}
+APValue::LValueBase::LValueBase(const Expr *P, unsigned I, unsigned V)
+ : Ptr(P), Local{I, V} {}
+
+APValue::LValueBase APValue::LValueBase::getDynamicAlloc(DynamicAllocLValue LV,
+ QualType Type) {
+ LValueBase Base;
+ Base.Ptr = LV;
+ Base.DynamicAllocType = Type.getAsOpaquePtr();
+ return Base;
+}
+
+APValue::LValueBase APValue::LValueBase::getTypeInfo(TypeInfoLValue LV,
+ QualType TypeInfo) {
+ LValueBase Base;
+ Base.Ptr = LV;
+ Base.TypeInfoType = TypeInfo.getAsOpaquePtr();
+ return Base;
+}
+
+unsigned APValue::LValueBase::getCallIndex() const {
+ return (is<TypeInfoLValue>() || is<DynamicAllocLValue>()) ? 0
+ : Local.CallIndex;
+}
+
+unsigned APValue::LValueBase::getVersion() const {
+ return (is<TypeInfoLValue>() || is<DynamicAllocLValue>()) ? 0 : Local.Version;
+}
+
+QualType APValue::LValueBase::getTypeInfoType() const {
+ assert(is<TypeInfoLValue>() && "not a type_info lvalue");
+ return QualType::getFromOpaquePtr(TypeInfoType);
+}
+
+QualType APValue::LValueBase::getDynamicAllocType() const {
+ assert(is<DynamicAllocLValue>() && "not a dynamic allocation lvalue");
+ return QualType::getFromOpaquePtr(DynamicAllocType);
+}
+
+namespace clang {
+bool operator==(const APValue::LValueBase &LHS,
+ const APValue::LValueBase &RHS) {
+ if (LHS.Ptr != RHS.Ptr)
+ return false;
+ if (LHS.is<TypeInfoLValue>())
+ return true;
+ return LHS.Local.CallIndex == RHS.Local.CallIndex &&
+ LHS.Local.Version == RHS.Local.Version;
+}
+}
+
+namespace {
+ struct LVBase {
+ APValue::LValueBase Base;
+ CharUnits Offset;
+ unsigned PathLength;
+ bool IsNullPtr : 1;
+ bool IsOnePastTheEnd : 1;
+ };
+}
+
+void *APValue::LValueBase::getOpaqueValue() const {
+ return Ptr.getOpaqueValue();
+}
+
+bool APValue::LValueBase::isNull() const {
+ return Ptr.isNull();
+}
+
+APValue::LValueBase::operator bool () const {
+ return static_cast<bool>(Ptr);
+}
+
+clang::APValue::LValueBase
+llvm::DenseMapInfo<clang::APValue::LValueBase>::getEmptyKey() {
+ return clang::APValue::LValueBase(
+ DenseMapInfo<const ValueDecl*>::getEmptyKey());
+}
+
+clang::APValue::LValueBase
+llvm::DenseMapInfo<clang::APValue::LValueBase>::getTombstoneKey() {
+ return clang::APValue::LValueBase(
+ DenseMapInfo<const ValueDecl*>::getTombstoneKey());
+}
+
+namespace clang {
+llvm::hash_code hash_value(const APValue::LValueBase &Base) {
+ if (Base.is<TypeInfoLValue>() || Base.is<DynamicAllocLValue>())
+ return llvm::hash_value(Base.getOpaqueValue());
+ return llvm::hash_combine(Base.getOpaqueValue(), Base.getCallIndex(),
+ Base.getVersion());
+}
+}
+
+unsigned llvm::DenseMapInfo<clang::APValue::LValueBase>::getHashValue(
+ const clang::APValue::LValueBase &Base) {
+ return hash_value(Base);
+}
+
+bool llvm::DenseMapInfo<clang::APValue::LValueBase>::isEqual(
+ const clang::APValue::LValueBase &LHS,
+ const clang::APValue::LValueBase &RHS) {
+ return LHS == RHS;
+}
+
+struct APValue::LV : LVBase {
+ static const unsigned InlinePathSpace =
+ (DataSize - sizeof(LVBase)) / sizeof(LValuePathEntry);
+
+ /// Path - The sequence of base classes, fields and array indices to follow to
+ /// walk from Base to the subobject. When performing GCC-style folding, there
+ /// may not be such a path.
+ union {
+ LValuePathEntry Path[InlinePathSpace];
+ LValuePathEntry *PathPtr;
+ };
+
+ LV() { PathLength = (unsigned)-1; }
+ ~LV() { resizePath(0); }
+
+ void resizePath(unsigned Length) {
+ if (Length == PathLength)
+ return;
+ if (hasPathPtr())
+ delete [] PathPtr;
+ PathLength = Length;
+ if (hasPathPtr())
+ PathPtr = new LValuePathEntry[Length];
+ }
+
+ bool hasPath() const { return PathLength != (unsigned)-1; }
+ bool hasPathPtr() const { return hasPath() && PathLength > InlinePathSpace; }
+
+ LValuePathEntry *getPath() { return hasPathPtr() ? PathPtr : Path; }
+ const LValuePathEntry *getPath() const {
+ return hasPathPtr() ? PathPtr : Path;
+ }
+};
+
+namespace {
+ struct MemberPointerBase {
+ llvm::PointerIntPair<const ValueDecl*, 1, bool> MemberAndIsDerivedMember;
+ unsigned PathLength;
+ };
+}
+
+struct APValue::MemberPointerData : MemberPointerBase {
+ static const unsigned InlinePathSpace =
+ (DataSize - sizeof(MemberPointerBase)) / sizeof(const CXXRecordDecl*);
+ typedef const CXXRecordDecl *PathElem;
+ union {
+ PathElem Path[InlinePathSpace];
+ PathElem *PathPtr;
+ };
+
+ MemberPointerData() { PathLength = 0; }
+ ~MemberPointerData() { resizePath(0); }
+
+ void resizePath(unsigned Length) {
+ if (Length == PathLength)
+ return;
+ if (hasPathPtr())
+ delete [] PathPtr;
+ PathLength = Length;
+ if (hasPathPtr())
+ PathPtr = new PathElem[Length];
+ }
+
+ bool hasPathPtr() const { return PathLength > InlinePathSpace; }
+
+ PathElem *getPath() { return hasPathPtr() ? PathPtr : Path; }
+ const PathElem *getPath() const {
+ return hasPathPtr() ? PathPtr : Path;
+ }
+};
+
+// FIXME: Reduce the malloc traffic here.
+
+APValue::Arr::Arr(unsigned NumElts, unsigned Size) :
+ Elts(new APValue[NumElts + (NumElts != Size ? 1 : 0)]),
+ NumElts(NumElts), ArrSize(Size) {}
+APValue::Arr::~Arr() { delete [] Elts; }
+
+APValue::StructData::StructData(unsigned NumBases, unsigned NumFields) :
+ Elts(new APValue[NumBases+NumFields]),
+ NumBases(NumBases), NumFields(NumFields) {}
+APValue::StructData::~StructData() {
+ delete [] Elts;
+}
+
+APValue::UnionData::UnionData() : Field(nullptr), Value(new APValue) {}
+APValue::UnionData::~UnionData () {
+ delete Value;
+}
+
+APValue::APValue(const APValue &RHS) : Kind(None) {
+ switch (RHS.getKind()) {
+ case None:
+ case Indeterminate:
+ Kind = RHS.getKind();
+ break;
+ case Int:
+ MakeInt();
+ setInt(RHS.getInt());
+ break;
+ case Float:
+ MakeFloat();
+ setFloat(RHS.getFloat());
+ break;
+ case FixedPoint: {
+ APFixedPoint FXCopy = RHS.getFixedPoint();
+ MakeFixedPoint(std::move(FXCopy));
+ break;
+ }
+ case Vector:
+ MakeVector();
+ setVector(((const Vec *)(const char *)RHS.Data.buffer)->Elts,
+ RHS.getVectorLength());
+ break;
+ case ComplexInt:
+ MakeComplexInt();
+ setComplexInt(RHS.getComplexIntReal(), RHS.getComplexIntImag());
+ break;
+ case ComplexFloat:
+ MakeComplexFloat();
+ setComplexFloat(RHS.getComplexFloatReal(), RHS.getComplexFloatImag());
+ break;
+ case LValue:
+ MakeLValue();
+ if (RHS.hasLValuePath())
+ setLValue(RHS.getLValueBase(), RHS.getLValueOffset(), RHS.getLValuePath(),
+ RHS.isLValueOnePastTheEnd(), RHS.isNullPointer());
+ else
+ setLValue(RHS.getLValueBase(), RHS.getLValueOffset(), NoLValuePath(),
+ RHS.isNullPointer());
+ break;
+ case Array:
+ MakeArray(RHS.getArrayInitializedElts(), RHS.getArraySize());
+ for (unsigned I = 0, N = RHS.getArrayInitializedElts(); I != N; ++I)
+ getArrayInitializedElt(I) = RHS.getArrayInitializedElt(I);
+ if (RHS.hasArrayFiller())
+ getArrayFiller() = RHS.getArrayFiller();
+ break;
+ case Struct:
+ MakeStruct(RHS.getStructNumBases(), RHS.getStructNumFields());
+ for (unsigned I = 0, N = RHS.getStructNumBases(); I != N; ++I)
+ getStructBase(I) = RHS.getStructBase(I);
+ for (unsigned I = 0, N = RHS.getStructNumFields(); I != N; ++I)
+ getStructField(I) = RHS.getStructField(I);
+ break;
+ case Union:
+ MakeUnion();
+ setUnion(RHS.getUnionField(), RHS.getUnionValue());
+ break;
+ case MemberPointer:
+ MakeMemberPointer(RHS.getMemberPointerDecl(),
+ RHS.isMemberPointerToDerivedMember(),
+ RHS.getMemberPointerPath());
+ break;
+ case AddrLabelDiff:
+ MakeAddrLabelDiff();
+ setAddrLabelDiff(RHS.getAddrLabelDiffLHS(), RHS.getAddrLabelDiffRHS());
+ break;
+ }
+}
+
+void APValue::DestroyDataAndMakeUninit() {
+ if (Kind == Int)
+ ((APSInt*)(char*)Data.buffer)->~APSInt();
+ else if (Kind == Float)
+ ((APFloat*)(char*)Data.buffer)->~APFloat();
+ else if (Kind == FixedPoint)
+ ((APFixedPoint *)(char *)Data.buffer)->~APFixedPoint();
+ else if (Kind == Vector)
+ ((Vec*)(char*)Data.buffer)->~Vec();
+ else if (Kind == ComplexInt)
+ ((ComplexAPSInt*)(char*)Data.buffer)->~ComplexAPSInt();
+ else if (Kind == ComplexFloat)
+ ((ComplexAPFloat*)(char*)Data.buffer)->~ComplexAPFloat();
+ else if (Kind == LValue)
+ ((LV*)(char*)Data.buffer)->~LV();
+ else if (Kind == Array)
+ ((Arr*)(char*)Data.buffer)->~Arr();
+ else if (Kind == Struct)
+ ((StructData*)(char*)Data.buffer)->~StructData();
+ else if (Kind == Union)
+ ((UnionData*)(char*)Data.buffer)->~UnionData();
+ else if (Kind == MemberPointer)
+ ((MemberPointerData*)(char*)Data.buffer)->~MemberPointerData();
+ else if (Kind == AddrLabelDiff)
+ ((AddrLabelDiffData*)(char*)Data.buffer)->~AddrLabelDiffData();
+ Kind = None;
+}
+
+bool APValue::needsCleanup() const {
+ switch (getKind()) {
+ case None:
+ case Indeterminate:
+ case AddrLabelDiff:
+ return false;
+ case Struct:
+ case Union:
+ case Array:
+ case Vector:
+ return true;
+ case Int:
+ return getInt().needsCleanup();
+ case Float:
+ return getFloat().needsCleanup();
+ case FixedPoint:
+ return getFixedPoint().getValue().needsCleanup();
+ case ComplexFloat:
+ assert(getComplexFloatImag().needsCleanup() ==
+ getComplexFloatReal().needsCleanup() &&
+ "In _Complex float types, real and imaginary values always have the "
+ "same size.");
+ return getComplexFloatReal().needsCleanup();
+ case ComplexInt:
+ assert(getComplexIntImag().needsCleanup() ==
+ getComplexIntReal().needsCleanup() &&
+ "In _Complex int types, real and imaginary values must have the "
+ "same size.");
+ return getComplexIntReal().needsCleanup();
+ case LValue:
+ return reinterpret_cast<const LV *>(Data.buffer)->hasPathPtr();
+ case MemberPointer:
+ return reinterpret_cast<const MemberPointerData *>(Data.buffer)
+ ->hasPathPtr();
+ }
+ llvm_unreachable("Unknown APValue kind!");
+}
+
+void APValue::swap(APValue &RHS) {
+ std::swap(Kind, RHS.Kind);
+ char TmpData[DataSize];
+ memcpy(TmpData, Data.buffer, DataSize);
+ memcpy(Data.buffer, RHS.Data.buffer, DataSize);
+ memcpy(RHS.Data.buffer, TmpData, DataSize);
+}
+
+LLVM_DUMP_METHOD void APValue::dump() const {
+ dump(llvm::errs());
+ llvm::errs() << '\n';
+}
+
+static double GetApproxValue(const llvm::APFloat &F) {
+ llvm::APFloat V = F;
+ bool ignored;
+ V.convert(llvm::APFloat::IEEEdouble(), llvm::APFloat::rmNearestTiesToEven,
+ &ignored);
+ return V.convertToDouble();
+}
+
+void APValue::dump(raw_ostream &OS) const {
+ switch (getKind()) {
+ case None:
+ OS << "None";
+ return;
+ case Indeterminate:
+ OS << "Indeterminate";
+ return;
+ case Int:
+ OS << "Int: " << getInt();
+ return;
+ case Float:
+ OS << "Float: " << GetApproxValue(getFloat());
+ return;
+ case FixedPoint:
+ OS << "FixedPoint : " << getFixedPoint();
+ return;
+ case Vector:
+ OS << "Vector: ";
+ getVectorElt(0).dump(OS);
+ for (unsigned i = 1; i != getVectorLength(); ++i) {
+ OS << ", ";
+ getVectorElt(i).dump(OS);
+ }
+ return;
+ case ComplexInt:
+ OS << "ComplexInt: " << getComplexIntReal() << ", " << getComplexIntImag();
+ return;
+ case ComplexFloat:
+ OS << "ComplexFloat: " << GetApproxValue(getComplexFloatReal())
+ << ", " << GetApproxValue(getComplexFloatImag());
+ return;
+ case LValue:
+ OS << "LValue: <todo>";
+ return;
+ case Array:
+ OS << "Array: ";
+ for (unsigned I = 0, N = getArrayInitializedElts(); I != N; ++I) {
+ getArrayInitializedElt(I).dump(OS);
+ if (I != getArraySize() - 1) OS << ", ";
+ }
+ if (hasArrayFiller()) {
+ OS << getArraySize() - getArrayInitializedElts() << " x ";
+ getArrayFiller().dump(OS);
+ }
+ return;
+ case Struct:
+ OS << "Struct ";
+ if (unsigned N = getStructNumBases()) {
+ OS << " bases: ";
+ getStructBase(0).dump(OS);
+ for (unsigned I = 1; I != N; ++I) {
+ OS << ", ";
+ getStructBase(I).dump(OS);
+ }
+ }
+ if (unsigned N = getStructNumFields()) {
+ OS << " fields: ";
+ getStructField(0).dump(OS);
+ for (unsigned I = 1; I != N; ++I) {
+ OS << ", ";
+ getStructField(I).dump(OS);
+ }
+ }
+ return;
+ case Union:
+ OS << "Union: ";
+ getUnionValue().dump(OS);
+ return;
+ case MemberPointer:
+ OS << "MemberPointer: <todo>";
+ return;
+ case AddrLabelDiff:
+ OS << "AddrLabelDiff: <todo>";
+ return;
+ }
+ llvm_unreachable("Unknown APValue kind!");
+}
+
+void APValue::printPretty(raw_ostream &Out, const ASTContext &Ctx,
+ QualType Ty) const {
+ switch (getKind()) {
+ case APValue::None:
+ Out << "<out of lifetime>";
+ return;
+ case APValue::Indeterminate:
+ Out << "<uninitialized>";
+ return;
+ case APValue::Int:
+ if (Ty->isBooleanType())
+ Out << (getInt().getBoolValue() ? "true" : "false");
+ else
+ Out << getInt();
+ return;
+ case APValue::Float:
+ Out << GetApproxValue(getFloat());
+ return;
+ case APValue::FixedPoint:
+ Out << getFixedPoint();
+ return;
+ case APValue::Vector: {
+ Out << '{';
+ QualType ElemTy = Ty->castAs<VectorType>()->getElementType();
+ getVectorElt(0).printPretty(Out, Ctx, ElemTy);
+ for (unsigned i = 1; i != getVectorLength(); ++i) {
+ Out << ", ";
+ getVectorElt(i).printPretty(Out, Ctx, ElemTy);
+ }
+ Out << '}';
+ return;
+ }
+ case APValue::ComplexInt:
+ Out << getComplexIntReal() << "+" << getComplexIntImag() << "i";
+ return;
+ case APValue::ComplexFloat:
+ Out << GetApproxValue(getComplexFloatReal()) << "+"
+ << GetApproxValue(getComplexFloatImag()) << "i";
+ return;
+ case APValue::LValue: {
+ bool IsReference = Ty->isReferenceType();
+ QualType InnerTy
+ = IsReference ? Ty.getNonReferenceType() : Ty->getPointeeType();
+ if (InnerTy.isNull())
+ InnerTy = Ty;
+
+ LValueBase Base = getLValueBase();
+ if (!Base) {
+ if (isNullPointer()) {
+ Out << (Ctx.getLangOpts().CPlusPlus11 ? "nullptr" : "0");
+ } else if (IsReference) {
+ Out << "*(" << InnerTy.stream(Ctx.getPrintingPolicy()) << "*)"
+ << getLValueOffset().getQuantity();
+ } else {
+ Out << "(" << Ty.stream(Ctx.getPrintingPolicy()) << ")"
+ << getLValueOffset().getQuantity();
+ }
+ return;
+ }
+
+ if (!hasLValuePath()) {
+ // No lvalue path: just print the offset.
+ CharUnits O = getLValueOffset();
+ CharUnits S = Ctx.getTypeSizeInChars(InnerTy);
+ if (!O.isZero()) {
+ if (IsReference)
+ Out << "*(";
+ if (O % S) {
+ Out << "(char*)";
+ S = CharUnits::One();
+ }
+ Out << '&';
+ } else if (!IsReference) {
+ Out << '&';
+ }
+
+ if (const ValueDecl *VD = Base.dyn_cast<const ValueDecl*>())
+ Out << *VD;
+ else if (TypeInfoLValue TI = Base.dyn_cast<TypeInfoLValue>()) {
+ TI.print(Out, Ctx.getPrintingPolicy());
+ } else if (DynamicAllocLValue DA = Base.dyn_cast<DynamicAllocLValue>()) {
+ Out << "{*new "
+ << Base.getDynamicAllocType().stream(Ctx.getPrintingPolicy()) << "#"
+ << DA.getIndex() << "}";
+ } else {
+ assert(Base.get<const Expr *>() != nullptr &&
+ "Expecting non-null Expr");
+ Base.get<const Expr*>()->printPretty(Out, nullptr,
+ Ctx.getPrintingPolicy());
+ }
+
+ if (!O.isZero()) {
+ Out << " + " << (O / S);
+ if (IsReference)
+ Out << ')';
+ }
+ return;
+ }
+
+ // We have an lvalue path. Print it out nicely.
+ if (!IsReference)
+ Out << '&';
+ else if (isLValueOnePastTheEnd())
+ Out << "*(&";
+
+ QualType ElemTy;
+ if (const ValueDecl *VD = Base.dyn_cast<const ValueDecl*>()) {
+ Out << *VD;
+ ElemTy = VD->getType();
+ } else if (TypeInfoLValue TI = Base.dyn_cast<TypeInfoLValue>()) {
+ TI.print(Out, Ctx.getPrintingPolicy());
+ ElemTy = Base.getTypeInfoType();
+ } else if (DynamicAllocLValue DA = Base.dyn_cast<DynamicAllocLValue>()) {
+ Out << "{*new "
+ << Base.getDynamicAllocType().stream(Ctx.getPrintingPolicy()) << "#"
+ << DA.getIndex() << "}";
+ ElemTy = Base.getDynamicAllocType();
+ } else {
+ const Expr *E = Base.get<const Expr*>();
+ assert(E != nullptr && "Expecting non-null Expr");
+ E->printPretty(Out, nullptr, Ctx.getPrintingPolicy());
+ // FIXME: This is wrong if E is a MaterializeTemporaryExpr with an lvalue
+ // adjustment.
+ ElemTy = E->getType();
+ }
+
+ ArrayRef<LValuePathEntry> Path = getLValuePath();
+ const CXXRecordDecl *CastToBase = nullptr;
+ for (unsigned I = 0, N = Path.size(); I != N; ++I) {
+ if (ElemTy->getAs<RecordType>()) {
+ // The lvalue refers to a class type, so the next path entry is a base
+ // or member.
+ const Decl *BaseOrMember = Path[I].getAsBaseOrMember().getPointer();
+ if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(BaseOrMember)) {
+ CastToBase = RD;
+ ElemTy = Ctx.getRecordType(RD);
+ } else {
+ const ValueDecl *VD = cast<ValueDecl>(BaseOrMember);
+ Out << ".";
+ if (CastToBase)
+ Out << *CastToBase << "::";
+ Out << *VD;
+ ElemTy = VD->getType();
+ }
+ } else {
+ // The lvalue must refer to an array.
+ Out << '[' << Path[I].getAsArrayIndex() << ']';
+ ElemTy = Ctx.getAsArrayType(ElemTy)->getElementType();
+ }
+ }
+
+ // Handle formatting of one-past-the-end lvalues.
+ if (isLValueOnePastTheEnd()) {
+ // FIXME: If CastToBase is non-0, we should prefix the output with
+ // "(CastToBase*)".
+ Out << " + 1";
+ if (IsReference)
+ Out << ')';
+ }
+ return;
+ }
+ case APValue::Array: {
+ const ArrayType *AT = Ctx.getAsArrayType(Ty);
+ QualType ElemTy = AT->getElementType();
+ Out << '{';
+ if (unsigned N = getArrayInitializedElts()) {
+ getArrayInitializedElt(0).printPretty(Out, Ctx, ElemTy);
+ for (unsigned I = 1; I != N; ++I) {
+ Out << ", ";
+ if (I == 10) {
+ // Avoid printing out the entire contents of large arrays.
+ Out << "...";
+ break;
+ }
+ getArrayInitializedElt(I).printPretty(Out, Ctx, ElemTy);
+ }
+ }
+ Out << '}';
+ return;
+ }
+ case APValue::Struct: {
+ Out << '{';
+ const RecordDecl *RD = Ty->castAs<RecordType>()->getDecl();
+ bool First = true;
+ if (unsigned N = getStructNumBases()) {
+ const CXXRecordDecl *CD = cast<CXXRecordDecl>(RD);
+ CXXRecordDecl::base_class_const_iterator BI = CD->bases_begin();
+ for (unsigned I = 0; I != N; ++I, ++BI) {
+ assert(BI != CD->bases_end());
+ if (!First)
+ Out << ", ";
+ getStructBase(I).printPretty(Out, Ctx, BI->getType());
+ First = false;
+ }
+ }
+ for (const auto *FI : RD->fields()) {
+ if (!First)
+ Out << ", ";
+ if (FI->isUnnamedBitfield()) continue;
+ getStructField(FI->getFieldIndex()).
+ printPretty(Out, Ctx, FI->getType());
+ First = false;
+ }
+ Out << '}';
+ return;
+ }
+ case APValue::Union:
+ Out << '{';
+ if (const FieldDecl *FD = getUnionField()) {
+ Out << "." << *FD << " = ";
+ getUnionValue().printPretty(Out, Ctx, FD->getType());
+ }
+ Out << '}';
+ return;
+ case APValue::MemberPointer:
+ // FIXME: This is not enough to unambiguously identify the member in a
+ // multiple-inheritance scenario.
+ if (const ValueDecl *VD = getMemberPointerDecl()) {
+ Out << '&' << *cast<CXXRecordDecl>(VD->getDeclContext()) << "::" << *VD;
+ return;
+ }
+ Out << "0";
+ return;
+ case APValue::AddrLabelDiff:
+ Out << "&&" << getAddrLabelDiffLHS()->getLabel()->getName();
+ Out << " - ";
+ Out << "&&" << getAddrLabelDiffRHS()->getLabel()->getName();
+ return;
+ }
+ llvm_unreachable("Unknown APValue kind!");
+}
+
+std::string APValue::getAsString(const ASTContext &Ctx, QualType Ty) const {
+ std::string Result;
+ llvm::raw_string_ostream Out(Result);
+ printPretty(Out, Ctx, Ty);
+ Out.flush();
+ return Result;
+}
+
+bool APValue::toIntegralConstant(APSInt &Result, QualType SrcTy,
+ const ASTContext &Ctx) const {
+ if (isInt()) {
+ Result = getInt();
+ return true;
+ }
+
+ if (isLValue() && isNullPointer()) {
+ Result = Ctx.MakeIntValue(Ctx.getTargetNullPointerValue(SrcTy), SrcTy);
+ return true;
+ }
+
+ if (isLValue() && !getLValueBase()) {
+ Result = Ctx.MakeIntValue(getLValueOffset().getQuantity(), SrcTy);
+ return true;
+ }
+
+ return false;
+}
+
+const APValue::LValueBase APValue::getLValueBase() const {
+ assert(isLValue() && "Invalid accessor");
+ return ((const LV*)(const void*)Data.buffer)->Base;
+}
+
+bool APValue::isLValueOnePastTheEnd() const {
+ assert(isLValue() && "Invalid accessor");
+ return ((const LV*)(const void*)Data.buffer)->IsOnePastTheEnd;
+}
+
+CharUnits &APValue::getLValueOffset() {
+ assert(isLValue() && "Invalid accessor");
+ return ((LV*)(void*)Data.buffer)->Offset;
+}
+
+bool APValue::hasLValuePath() const {
+ assert(isLValue() && "Invalid accessor");
+ return ((const LV*)(const char*)Data.buffer)->hasPath();
+}
+
+ArrayRef<APValue::LValuePathEntry> APValue::getLValuePath() const {
+ assert(isLValue() && hasLValuePath() && "Invalid accessor");
+ const LV &LVal = *((const LV*)(const char*)Data.buffer);
+ return llvm::makeArrayRef(LVal.getPath(), LVal.PathLength);
+}
+
+unsigned APValue::getLValueCallIndex() const {
+ assert(isLValue() && "Invalid accessor");
+ return ((const LV*)(const char*)Data.buffer)->Base.getCallIndex();
+}
+
+unsigned APValue::getLValueVersion() const {
+ assert(isLValue() && "Invalid accessor");
+ return ((const LV*)(const char*)Data.buffer)->Base.getVersion();
+}
+
+bool APValue::isNullPointer() const {
+ assert(isLValue() && "Invalid usage");
+ return ((const LV*)(const char*)Data.buffer)->IsNullPtr;
+}
+
+void APValue::setLValue(LValueBase B, const CharUnits &O, NoLValuePath,
+ bool IsNullPtr) {
+ assert(isLValue() && "Invalid accessor");
+ LV &LVal = *((LV*)(char*)Data.buffer);
+ LVal.Base = B;
+ LVal.IsOnePastTheEnd = false;
+ LVal.Offset = O;
+ LVal.resizePath((unsigned)-1);
+ LVal.IsNullPtr = IsNullPtr;
+}
+
+void APValue::setLValue(LValueBase B, const CharUnits &O,
+ ArrayRef<LValuePathEntry> Path, bool IsOnePastTheEnd,
+ bool IsNullPtr) {
+ assert(isLValue() && "Invalid accessor");
+ LV &LVal = *((LV*)(char*)Data.buffer);
+ LVal.Base = B;
+ LVal.IsOnePastTheEnd = IsOnePastTheEnd;
+ LVal.Offset = O;
+ LVal.resizePath(Path.size());
+ memcpy(LVal.getPath(), Path.data(), Path.size() * sizeof(LValuePathEntry));
+ LVal.IsNullPtr = IsNullPtr;
+}
+
+const ValueDecl *APValue::getMemberPointerDecl() const {
+ assert(isMemberPointer() && "Invalid accessor");
+ const MemberPointerData &MPD =
+ *((const MemberPointerData *)(const char *)Data.buffer);
+ return MPD.MemberAndIsDerivedMember.getPointer();
+}
+
+bool APValue::isMemberPointerToDerivedMember() const {
+ assert(isMemberPointer() && "Invalid accessor");
+ const MemberPointerData &MPD =
+ *((const MemberPointerData *)(const char *)Data.buffer);
+ return MPD.MemberAndIsDerivedMember.getInt();
+}
+
+ArrayRef<const CXXRecordDecl*> APValue::getMemberPointerPath() const {
+ assert(isMemberPointer() && "Invalid accessor");
+ const MemberPointerData &MPD =
+ *((const MemberPointerData *)(const char *)Data.buffer);
+ return llvm::makeArrayRef(MPD.getPath(), MPD.PathLength);
+}
+
+void APValue::MakeLValue() {
+ assert(isAbsent() && "Bad state change");
+ static_assert(sizeof(LV) <= DataSize, "LV too big");
+ new ((void*)(char*)Data.buffer) LV();
+ Kind = LValue;
+}
+
+void APValue::MakeArray(unsigned InitElts, unsigned Size) {
+ assert(isAbsent() && "Bad state change");
+ new ((void*)(char*)Data.buffer) Arr(InitElts, Size);
+ Kind = Array;
+}
+
+void APValue::MakeMemberPointer(const ValueDecl *Member, bool IsDerivedMember,
+ ArrayRef<const CXXRecordDecl*> Path) {
+ assert(isAbsent() && "Bad state change");
+ MemberPointerData *MPD = new ((void*)(char*)Data.buffer) MemberPointerData;
+ Kind = MemberPointer;
+ MPD->MemberAndIsDerivedMember.setPointer(Member);
+ MPD->MemberAndIsDerivedMember.setInt(IsDerivedMember);
+ MPD->resizePath(Path.size());
+ memcpy(MPD->getPath(), Path.data(), Path.size()*sizeof(const CXXRecordDecl*));
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 10:15:09 +0000