Descriptor.h Source File (original) (raw)

13#ifndef LLVM_CLANG_AST_INTERP_DESCRIPTOR_H

14#define LLVM_CLANG_AST_INTERP_DESCRIPTOR_H

21namespace interp {

24class SourceInfo;

25struct InitMap;

26struct Descriptor;

29using DeclTy = llvm::PointerUnion<const Decl *, const Expr *>;

30using InitMapPtr = std::optional<std::pair<bool, std::shared_ptr>>;

36 bool IsMutable, bool IsActive, bool InUnion,

49 std::byte *DstFieldPtr,

56};

61};

76 LLVM_PREFERRED_TYPE(bool)

82 LLVM_PREFERRED_TYPE(bool)

85 LLVM_PREFERRED_TYPE(bool)

88 LLVM_PREFERRED_TYPE(bool)

91 LLVM_PREFERRED_TYPE(bool)

95 LLVM_PREFERRED_TYPE(bool)

97 LLVM_PREFERRED_TYPE(bool)

100 LLVM_PREFERRED_TYPE(bool)

102

104

109

110 void dump() const { dump(llvm::errs()); }

111 void dump(llvm::raw_ostream &OS) const;

112};

113static_assert(sizeof(GlobalInlineDescriptor) != sizeof(InlineDescriptor), "");

114

115

117private:

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121 const unsigned ElemSize;

122

123 const unsigned Size;

124

125 const unsigned MDSize;

126

127 const unsigned AllocSize;

128

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130 static constexpr unsigned UnknownSizeMark = (unsigned)-1;

131

132public:

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142 std::numeric_limits<decltype(AllocSize)>::max() - sizeof(InitMapPtr) -

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152 const std::optional PrimT = std::nullopt;

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204 const Decl *asDecl() const { return dyn_cast<const Decl *>(Source); }

205 const Expr *asExpr() const { return dyn_cast<const Expr *>(Source); }

207

209 return dyn_cast_if_present(asDecl());

210 }

211

213 return dyn_cast_if_present(asDecl());

214 }

215

217 return dyn_cast_if_present(asDecl());

218 }

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221 return dyn_cast_if_present(asDecl());

222 }

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227 return Size;

228 }

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233 }

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245 }

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268 void dump() const;

269 void dump(llvm::raw_ostream &OS) const;

270};

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274private:

275

276 using T = uint64_t;

277

278 static constexpr uint64_t PER_FIELD = sizeof(T) * CHAR_BIT;

279

280public:

281

282 explicit InitMap(unsigned N);

283

284private:

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288 T *data() { return Data.get(); }

289 const T *data() const { return Data.get(); }

290

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292 bool initializeElement(unsigned I);

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295 bool isElementInitialized(unsigned I) const;

296

297 static constexpr size_t numFields(unsigned N) {

298 return (N + PER_FIELD - 1) / PER_FIELD;

299 }

300

301 unsigned UninitFields;

302 std::unique_ptr<T[]> Data;

303};

304

305}

306}

307

308#endif

llvm::MachO::Record Record

__DEVICE__ int max(int __a, int __b)

Decl - This represents one declaration (or definition), e.g.

This represents one expression.

Represents a member of a struct/union/class.

A (possibly-)qualified type.

Represents a struct/union/class.

Encodes a location in the source.

The base class of the type hierarchy.

Represent the declaration of a variable (in which case it is an lvalue) a function (in which case it ...

Represents a variable declaration or definition.

A memory block, either on the stack or in the heap.

A pointer to a memory block, live or dead.

Structure/Class descriptor.

Describes the statement/declaration an opcode was generated from.

std::optional< std::pair< bool, std::shared_ptr< InitMap > > > InitMapPtr

void(*)(Block *Storage, std::byte *FieldPtr, bool IsConst, bool IsMutable, bool IsActive, bool InUnion, const Descriptor *FieldDesc) BlockCtorFn

Invoked whenever a block is created.

void(*)(Block *Storage, std::byte *FieldPtr, const Descriptor *FieldDesc) BlockDtorFn

Invoked when a block is destroyed.

constexpr size_t align(size_t Size)

Aligns a size to the pointer alignment.

PrimType

Enumeration of the primitive types of the VM.

void(*)(Block *Storage, std::byte *SrcFieldPtr, std::byte *DstFieldPtr, const Descriptor *FieldDesc) BlockMoveFn

Invoked when a block with pointers referencing it goes out of scope.

llvm::PointerUnion< const Decl *, const Expr * > DeclTy

The JSON file list parser is used to communicate input to InstallAPI.

Token to denote structures of unknown size.

Describes a memory block created by an allocation site.

const bool IsConst

Flag indicating if the block is mutable.

unsigned getAllocSize() const

Returns the allocated size, including metadata.

unsigned getNumElems() const

Returns the number of elements stored in the block.

unsigned getSize() const

Returns the size of the object without metadata.

void makeDummy()

Make this descriptor a dummy descriptor.

bool isPrimitive() const

Checks if the descriptor is of a primitive.

QualType getElemQualType() const

const RecordDecl * asRecordDecl() const

bool isCompositeArray() const

Checks if the descriptor is of an array of composites.

static constexpr MetadataSize GlobalMD

const ValueDecl * asValueDecl() const

const BlockCtorFn CtorFn

Storage management methods.

static constexpr unsigned MaxArrayElemBytes

Maximum number of bytes to be used for array elements.

const DeclTy & getSource() const

const Decl * asDecl() const

const Descriptor *const ElemDesc

Descriptor of the array element.

SourceInfo getLoc() const

bool isDummy() const

Checks if this is a dummy descriptor.

unsigned getMetadataSize() const

Returns the size of the metadata.

SourceLocation getLocation() const

const bool IsMutable

Flag indicating if a field is mutable.

static constexpr MetadataSize InlineDescMD

std::optional< unsigned > MetadataSize

bool isUnknownSizeArray() const

Checks if the descriptor is of an array of unknown size.

bool IsDummy

Flag indicating if this is a dummy descriptor.

unsigned getElemSize() const

returns the size of an element when the structure is viewed as an array.

const bool IsArray

Flag indicating if the block is an array.

bool isPrimitiveArray() const

Checks if the descriptor is of an array of primitives.

bool isZeroSizeArray() const

Checks if the descriptor is of an array of zero size.

const FieldDecl * asFieldDecl() const

const VarDecl * asVarDecl() const

PrimType getPrimType() const

bool isRecord() const

Checks if the descriptor is of a record.

const bool IsTemporary

Flag indicating if the block is a temporary.

const Record *const ElemRecord

Pointer to the record, if block contains records.

bool isUnion() const

Checks if the descriptor is of a union.

const std::optional< PrimType > PrimT

The primitive type this descriptor was created for, or the primitive element type in case this is a p...

const Expr * asExpr() const

bool isArray() const

Checks if the descriptor is of an array.

Descriptor used for global variables.

GlobalInitState InitState

Bitfield tracking the initialisation status of elements of primitive arrays.

Inline descriptor embedded in structures and arrays.

unsigned IsActive

Flag indicating if the field is the active member of a union.

unsigned IsBase

Flag indicating if the field is an embedded base class.

unsigned IsVirtualBase

Flag inidcating if the field is a virtual base class.

unsigned InUnion

Flat indicating if this field is in a union (even if nested).

unsigned Offset

Offset inside the structure/array.

unsigned IsInitialized

For primitive fields, it indicates if the field was initialized.

unsigned IsConst

Flag indicating if the storage is constant or not.

unsigned IsArrayElement

Flag indicating if the field is an element of a composite array.

unsigned IsFieldMutable

Flag indicating if the field is mutable (if in a record).