A concrete base class for struct and array aggregate initializer builders. More...

#include "clang/CodeGen/ConstantInitBuilder.h"

Classes
class	PlaceholderPosition
	An opaque class to hold the abstract position of a placeholder. More...

Public Member Functions
	ConstantAggregateBuilderBase (const ConstantAggregateBuilderBase &)=delete

ConstantAggregateBuilderBase &	operator= (const ConstantAggregateBuilderBase &)=delete

	ConstantAggregateBuilderBase (ConstantAggregateBuilderBase &&other)

ConstantAggregateBuilderBase &	operator= (ConstantAggregateBuilderBase &&other)=delete

size_t	size () const
	Return the number of elements that have been added to this struct or array.

bool	empty () const
	Return true if no elements have yet been added to this struct or array.

void	abandon ()
	Abandon this builder completely.

void	add (llvm::Constant *value)
	Add a new value to this initializer.

void	addSize (CharUnits size)
	Add an integer value of type size_t.

void	addInt (llvm::IntegerType *intTy, uint64_t value, bool isSigned=false)
	Add an integer value of a specific type.

void	addNullPointer (llvm::PointerType *ptrTy)
	Add a null pointer of a specific type.

void	addBitCast (llvm::Constant value, llvm::Type type)
	Add a bitcast of a value to a specific type.

void	addAll (llvm::ArrayRef< llvm::Constant * > values)
	Add a bunch of new values to this initializer.

void	addRelativeOffset (llvm::IntegerType type, llvm::Constant target)
	Add a relative offset to the given target address, i.e.

void	addRelativeOffsetToPosition (llvm::IntegerType type, llvm::Constant target, size_t position)
	Same as addRelativeOffset(), but instead relative to an element in this aggregate, identified by its index.

void	addTaggedRelativeOffset (llvm::IntegerType type, llvm::Constant address, unsigned tag)
	Add a relative offset to the target address, plus a small constant offset.

CharUnits	getNextOffsetFromGlobal () const
	Return the offset from the start of the initializer to the next position, assuming no padding is required prior to it.

PlaceholderPosition	addPlaceholder ()
	Add a placeholder value to the structure.

PlaceholderPosition	addPlaceholderWithSize (llvm::Type *expectedType)
	Add a placeholder, giving the expected type that will be filled in.

void	fillPlaceholderWithInt (PlaceholderPosition position, llvm::IntegerType *type, uint64_t value, bool isSigned=false)
	Fill a previously-added placeholder.

void	fillPlaceholder (PlaceholderPosition position, llvm::Constant *value)
	Fill a previously-added placeholder.

llvm::Constant *	getAddrOfCurrentPosition (llvm::Type *type)
	Produce an address which will eventually point to the next position to be filled.

llvm::Constant *	getAddrOfPosition (llvm::Type *type, size_t position)
	Produce an address which points to a position in the aggregate being constructed.

llvm::ArrayRef< llvm::Constant * >	getGEPIndicesToCurrentPosition (llvm::SmallVectorImpl< llvm::Constant * > &indices)

Protected Member Functions
llvm::SmallVectorImpl< llvm::Constant * > &	getBuffer ()

const llvm::SmallVectorImpl< llvm::Constant * > &	getBuffer () const

	ConstantAggregateBuilderBase (ConstantInitBuilderBase &builder, ConstantAggregateBuilderBase *parent)

	~ConstantAggregateBuilderBase ()

void	markFinished ()

llvm::Constant *	finishArray (llvm::Type *eltTy)

llvm::Constant *	finishStruct (llvm::StructType *structTy)

Protected Attributes
ConstantInitBuilderBase &	Builder

ConstantAggregateBuilderBase *	Parent

size_t	Begin

size_t	CachedOffsetEnd = 0

bool	Finished = false

bool	Frozen = false

bool	Packed = false

CharUnits	CachedOffsetFromGlobal

Detailed Description

A concrete base class for struct and array aggregate initializer builders.

Definition at line 97 of file ConstantInitBuilder.h.

Constructor & Destructor Documentation

◆ ConstantAggregateBuilderBase() [1/3]

clang::CodeGen::ConstantAggregateBuilderBase::ConstantAggregateBuilderBase	(	ConstantInitBuilderBase &	builder,
		ConstantAggregateBuilderBase *	parent
	)

inlineprotected

Definition at line 116 of file ConstantInitBuilder.h.

References Frozen.

◆ ~ConstantAggregateBuilderBase()

clang::CodeGen::ConstantAggregateBuilderBase::~ConstantAggregateBuilderBase ( )

inlineprotected

Definition at line 128 of file ConstantInitBuilder.h.

References Finished.

◆ ConstantAggregateBuilderBase() [2/3]

clang::CodeGen::ConstantAggregateBuilderBase::ConstantAggregateBuilderBase ( const ConstantAggregateBuilderBase & )

delete

◆ ConstantAggregateBuilderBase() [3/3]

clang::CodeGen::ConstantAggregateBuilderBase::ConstantAggregateBuilderBase ( ConstantAggregateBuilderBase && other )

inline

Definition at line 155 of file ConstantInitBuilder.h.

Member Function Documentation

◆ abandon()

void clang::CodeGen::ConstantAggregateBuilderBase::abandon ( )

inline

Abandon this builder completely.

Definition at line 180 of file ConstantInitBuilder.h.

References Begin, and markFinished().

◆ add()

void clang::CodeGen::ConstantAggregateBuilderBase::add ( llvm::Constant * value )

inline

Add a new value to this initializer.

Definition at line 186 of file ConstantInitBuilder.h.

References Builder, Finished, and Frozen.

Referenced by addBitCast(), addInt(), addNullPointer(), addRelativeOffset(), addRelativeOffsetToPosition(), addSize(), and addTaggedRelativeOffset().

◆ addAll()

void clang::CodeGen::ConstantAggregateBuilderBase::addAll ( llvm::ArrayRef< llvm::Constant * > values )

inline

Add a bunch of new values to this initializer.

Definition at line 213 of file ConstantInitBuilder.h.

References Builder, Finished, and Frozen.

◆ addBitCast()

void clang::CodeGen::ConstantAggregateBuilderBase::addBitCast	(	llvm::Constant *	value,
		llvm::Type *	type
	)

inline

Add a bitcast of a value to a specific type.

Definition at line 208 of file ConstantInitBuilder.h.

References add(), and clang::ast_matchers::type.

◆ addInt()

void clang::CodeGen::ConstantAggregateBuilderBase::addInt	(	llvm::IntegerType *	intTy,
		uint64_t	value,
		bool	isSigned = `false`
	)

inline

Add an integer value of a specific type.

Definition at line 197 of file ConstantInitBuilder.h.

References add().

◆ addNullPointer()

void clang::CodeGen::ConstantAggregateBuilderBase::addNullPointer ( llvm::PointerType * ptrTy )

inline

Add a null pointer of a specific type.

Definition at line 203 of file ConstantInitBuilder.h.

References add().

◆ addPlaceholder()

PlaceholderPosition clang::CodeGen::ConstantAggregateBuilderBase::addPlaceholder ( )

inline

Add a placeholder value to the structure.

The returned position can be used to set the value later; it will not be invalidated by any intermediate operations except (1) filling the same position or (2) finishing the entire builder.

This is useful for emitting certain kinds of structure which contain some sort of summary field, generally a count, before any of the data. By emitting a placeholder first, the structure can be emitted eagerly.

Definition at line 278 of file ConstantInitBuilder.h.

References Builder, Finished, and Frozen.

Referenced by addPlaceholderWithSize().

◆ addPlaceholderWithSize()

ConstantAggregateBuilderBase::PlaceholderPosition ConstantAggregateBuilderBase::addPlaceholderWithSize ( llvm::Type * expectedType )

Add a placeholder, giving the expected type that will be filled in.

Definition at line 202 of file ConstantInitBuilder.cpp.

References addPlaceholder(), clang::CharUnits::alignTo(), Builder, CachedOffsetEnd, CachedOffsetFromGlobal, clang::CharUnits::fromQuantity(), clang::CodeGen::CodeGenModule::getDataLayout(), getNextOffsetFromGlobal(), Packed, and clang::ast_matchers::type.

◆ addRelativeOffset()

void clang::CodeGen::ConstantAggregateBuilderBase::addRelativeOffset	(	llvm::IntegerType *	type,
		llvm::Constant *	target
	)

inline

Add a relative offset to the given target address, i.e.

the static difference between the target address and the address of the relative offset. The target must be known to be defined in the current linkage unit. The offset will have the given integer type, which must be no wider than intptr_t. Some targets may not fully support this operation.

Definition at line 225 of file ConstantInitBuilder.h.

References add(), and clang::ast_matchers::type.

◆ addRelativeOffsetToPosition()

void clang::CodeGen::ConstantAggregateBuilderBase::addRelativeOffsetToPosition	(	llvm::IntegerType *	type,
		llvm::Constant *	target,
		size_t	position
	)

inline

Same as addRelativeOffset(), but instead relative to an element in this aggregate, identified by its index.

Definition at line 231 of file ConstantInitBuilder.h.

References add(), and clang::ast_matchers::type.

◆ addSize()

void ConstantAggregateBuilderBase::addSize ( CharUnits size )

Add an integer value of type size_t.

Definition at line 124 of file ConstantInitBuilder.cpp.

References add(), Builder, clang::CodeGen::CodeGenModule::getSize(), and size().

◆ addTaggedRelativeOffset()

void clang::CodeGen::ConstantAggregateBuilderBase::addTaggedRelativeOffset	(	llvm::IntegerType *	type,
		llvm::Constant *	address,
		unsigned	tag
	)

inline

Add a relative offset to the target address, plus a small constant offset.

This is primarily useful when the relative offset is known to be a multiple of (say) four and therefore the tag can be used to express an extra two bits of information.

Definition at line 240 of file ConstantInitBuilder.h.

References add(), and clang::ast_matchers::type.

◆ empty()

bool clang::CodeGen::ConstantAggregateBuilderBase::empty ( ) const

inline

Return true if no elements have yet been added to this struct or array.

Definition at line 175 of file ConstantInitBuilder.h.

References size().

◆ fillPlaceholder()

void clang::CodeGen::ConstantAggregateBuilderBase::fillPlaceholder	(	PlaceholderPosition	position,
		llvm::Constant *	value
	)

inline

Fill a previously-added placeholder.

Definition at line 296 of file ConstantInitBuilder.h.

References Builder, Finished, and Frozen.

Referenced by fillPlaceholderWithInt().

◆ fillPlaceholderWithInt()

void clang::CodeGen::ConstantAggregateBuilderBase::fillPlaceholderWithInt	(	PlaceholderPosition	position,
		llvm::IntegerType *	type,
		uint64_t	value,
		bool	isSigned = `false`
	)

inline

Fill a previously-added placeholder.

Definition at line 289 of file ConstantInitBuilder.h.

References fillPlaceholder(), and clang::ast_matchers::type.

◆ finishArray()

llvm::Constant * ConstantAggregateBuilderBase::finishArray ( llvm::Type * eltTy )

protected

Definition at line 263 of file ConstantInitBuilder.cpp.

References Begin, getBuffer(), markFinished(), and clang::ast_matchers::type.

◆ finishStruct()

llvm::Constant * ConstantAggregateBuilderBase::finishStruct ( llvm::StructType * structTy )

protected

Definition at line 279 of file ConstantInitBuilder.cpp.

References Begin, Builder, getBuffer(), clang::CodeGen::CodeGenModule::getLLVMContext(), markFinished(), and Packed.

◆ getAddrOfCurrentPosition()

llvm::Constant * ConstantAggregateBuilderBase::getAddrOfCurrentPosition ( llvm::Type * type )

Produce an address which will eventually point to the next position to be filled.

This is computed with an indexed getelementptr rather than by computing offsets.

The returned pointer will have type T*, where T is the given type. This type can differ from the type of the actual element.

Definition at line 168 of file ConstantInitBuilder.cpp.

References Builder, getGEPIndicesToCurrentPosition(), clang::CodeGen::CodeGenModule::getModule(), and clang::ast_matchers::type.

◆ getAddrOfPosition()

llvm::Constant * ConstantAggregateBuilderBase::getAddrOfPosition	(	llvm::Type *	type,
		size_t	position
	)

Produce an address which points to a position in the aggregate being constructed.

This is computed with an indexed getelementptr rather than by computing offsets.

The returned pointer will have type T*, where T is the given type. This type can differ from the type of the actual element.

Definition at line 154 of file ConstantInitBuilder.cpp.

References Begin, Builder, clang::CodeGen::CodeGenModule::getModule(), and clang::ast_matchers::type.

◆ getBuffer() [1/2]

llvm::SmallVectorImpl< llvm::Constant * > & clang::CodeGen::ConstantAggregateBuilderBase::getBuffer ( )

inlineprotected

Definition at line 108 of file ConstantInitBuilder.h.

References Builder.

Referenced by finishArray(), finishStruct(), and size().

◆ getBuffer() [2/2]

const llvm::SmallVectorImpl< llvm::Constant * > & clang::CodeGen::ConstantAggregateBuilderBase::getBuffer ( ) const

inlineprotected

Definition at line 112 of file ConstantInitBuilder.h.

References Builder.

◆ getGEPIndicesToCurrentPosition()

llvm::ArrayRef< llvm::Constant * > clang::CodeGen::ConstantAggregateBuilderBase::getGEPIndicesToCurrentPosition ( llvm::SmallVectorImpl< llvm::Constant * > & indices )

inline

Definition at line 320 of file ConstantInitBuilder.h.

References Builder.

Referenced by getAddrOfCurrentPosition().

◆ getNextOffsetFromGlobal()

CharUnits clang::CodeGen::ConstantAggregateBuilderBase::getNextOffsetFromGlobal ( ) const

inline

Return the offset from the start of the initializer to the next position, assuming no padding is required prior to it.

This operation will not succeed if any unsized placeholders are currently in place in the initializer.

Definition at line 256 of file ConstantInitBuilder.h.

References Builder, Finished, and Frozen.

Referenced by addPlaceholderWithSize().

◆ markFinished()

void clang::CodeGen::ConstantAggregateBuilderBase::markFinished ( )

inlineprotected

Definition at line 132 of file ConstantInitBuilder.h.

References Builder, Finished, Frozen, and Parent.

Referenced by abandon(), finishArray(), and finishStruct().

◆ operator=() [1/2]

ConstantAggregateBuilderBase & clang::CodeGen::ConstantAggregateBuilderBase::operator= ( const ConstantAggregateBuilderBase & )

delete

◆ operator=() [2/2]

ConstantAggregateBuilderBase & clang::CodeGen::ConstantAggregateBuilderBase::operator= ( ConstantAggregateBuilderBase && other )

delete

◆ size()

size_t clang::CodeGen::ConstantAggregateBuilderBase::size ( ) const

inline

Return the number of elements that have been added to this struct or array.

Definition at line 167 of file ConstantInitBuilder.h.

References Begin, getBuffer(), and size().

Referenced by addSize(), empty(), and size().

Member Data Documentation

◆ Begin

size_t clang::CodeGen::ConstantAggregateBuilderBase::Begin

protected

Definition at line 101 of file ConstantInitBuilder.h.

Referenced by abandon(), finishArray(), finishStruct(), getAddrOfPosition(), and size().

◆ Builder

ConstantInitBuilderBase& clang::CodeGen::ConstantAggregateBuilderBase::Builder

protected

Definition at line 99 of file ConstantInitBuilder.h.

Referenced by add(), addAll(), addPlaceholder(), addPlaceholderWithSize(), addSize(), fillPlaceholder(), finishStruct(), getAddrOfCurrentPosition(), getAddrOfPosition(), getBuffer(), getGEPIndicesToCurrentPosition(), getNextOffsetFromGlobal(), and markFinished().

◆ CachedOffsetEnd

size_t clang::CodeGen::ConstantAggregateBuilderBase::CachedOffsetEnd = 0

mutableprotected

Definition at line 102 of file ConstantInitBuilder.h.

Referenced by addPlaceholderWithSize().

◆ CachedOffsetFromGlobal

CharUnits clang::CodeGen::ConstantAggregateBuilderBase::CachedOffsetFromGlobal

mutableprotected

Definition at line 106 of file ConstantInitBuilder.h.

Referenced by addPlaceholderWithSize().

◆ Finished

bool clang::CodeGen::ConstantAggregateBuilderBase::Finished = false

protected

Definition at line 103 of file ConstantInitBuilder.h.

Referenced by add(), addAll(), addPlaceholder(), fillPlaceholder(), getNextOffsetFromGlobal(), markFinished(), and ~ConstantAggregateBuilderBase().

◆ Frozen

bool clang::CodeGen::ConstantAggregateBuilderBase::Frozen = false

protected

Definition at line 104 of file ConstantInitBuilder.h.

Referenced by add(), addAll(), addPlaceholder(), ConstantAggregateBuilderBase(), fillPlaceholder(), getNextOffsetFromGlobal(), and markFinished().

◆ Packed

bool clang::CodeGen::ConstantAggregateBuilderBase::Packed = false

protected

Definition at line 105 of file ConstantInitBuilder.h.

Referenced by addPlaceholderWithSize(), and finishStruct().

◆ Parent

ConstantAggregateBuilderBase* clang::CodeGen::ConstantAggregateBuilderBase::Parent

protected

Definition at line 100 of file ConstantInitBuilder.h.

Referenced by markFinished().

The documentation for this class was generated from the following files:

include/clang/CodeGen/ConstantInitBuilder.h
lib/CodeGen/ConstantInitBuilder.cpp

Classes

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ ConstantAggregateBuilderBase() [1/3]

◆ ~ConstantAggregateBuilderBase()

◆ ConstantAggregateBuilderBase() [2/3]

◆ ConstantAggregateBuilderBase() [3/3]

Member Function Documentation

◆ abandon()

◆ add()

◆ addAll()

◆ addBitCast()

◆ addInt()

◆ addNullPointer()

◆ addPlaceholder()

◆ addPlaceholderWithSize()

◆ addRelativeOffset()

◆ addRelativeOffsetToPosition()

◆ addSize()

◆ addTaggedRelativeOffset()

◆ empty()

◆ fillPlaceholder()

◆ fillPlaceholderWithInt()

◆ finishArray()

◆ finishStruct()

◆ getAddrOfCurrentPosition()

◆ getAddrOfPosition()

◆ getBuffer() [1/2]

◆ getBuffer() [2/2]

◆ getGEPIndicesToCurrentPosition()

◆ getNextOffsetFromGlobal()

◆ markFinished()

◆ operator=() [1/2]

◆ operator=() [2/2]

◆ size()

Member Data Documentation

◆ Begin

◆ Builder

◆ CachedOffsetEnd

◆ CachedOffsetFromGlobal

◆ Finished

◆ Frozen

◆ Packed

◆ Parent