LLVM: llvm::StructLayout Class Reference (original) (raw)

Used to lazily calculate structure layout information for a target machine, based on the DataLayout structure. More...

#include "[llvm/IR/DataLayout.h](DataLayout%5F8h%5Fsource.html)"

Public Member Functions
TypeSize getSizeInBytes () const
TypeSize getSizeInBits () const
Align getAlignment () const
bool hasPadding () const
Returns whether the struct has padding or not between its fields.
unsigned getElementContainingOffset (uint64_t FixedOffset) const
Given a valid byte offset into the structure, returns the structure index that contains it.
MutableArrayRef< TypeSize > getMemberOffsets ()
ArrayRef< TypeSize > getMemberOffsets () const
TypeSize getElementOffset (unsigned Idx) const
TypeSize getElementOffsetInBits (unsigned Idx) const
- Public Member Functions inherited from llvm::TrailingObjects< StructLayout, TypeSize >
const T * getTrailingObjects () const
Returns a pointer to the trailing object array of the given type (which must be one of those specified in the class template).
T * getTrailingObjects ()
Returns a pointer to the trailing object array of the given type (which must be one of those specified in the class template).
TrailingObjects ()=default
TrailingObjects (const TrailingObjects &)=delete
TrailingObjects (TrailingObjects &&)=delete
TrailingObjects & operator= (const TrailingObjects &)=delete
TrailingObjects & operator= (TrailingObjects &&)=delete
Additional Inherited Members
- Static Public Member Functions inherited from llvm::TrailingObjects< StructLayout, TypeSize >
static constexpr std::enable_if_t< std::is_same_v< Foo< TrailingTys... >, Foo< Tys... > >, size_t > additionalSizeToAlloc (typename trailing_objects_internal::ExtractSecondType< TrailingTys, size_t >::type... Counts)
Returns the size of the trailing data, if an object were allocated with the given counts (The counts are in the same order as the template arguments).
static constexpr std::enable_if_t< std::is_same_v< Foo< TrailingTys... >, Foo< Tys... > >, size_t > totalSizeToAlloc (typename trailing_objects_internal::ExtractSecondType< TrailingTys, size_t >::type... Counts)
Returns the total size of an object if it were allocated with the given trailing object counts.

Used to lazily calculate structure layout information for a target machine, based on the DataLayout structure.

Definition at line 567 of file DataLayout.h.

◆ getAlignment()

Align llvm::StructLayout::getAlignment ( ) const inline

◆ getElementContainingOffset()

Given a valid byte offset into the structure, returns the structure index that contains it.

getElementContainingOffset - Given a valid offset into the structure, return the structure index that contains it.

Definition at line 92 of file DataLayout.cpp.

References assert(), llvm::ArrayRef< T >::begin(), llvm::ArrayRef< T >::end(), llvm::TypeSize::getFixed(), getMemberOffsets(), llvm::details::FixedOrScalableQuantity< TypeSize, uint64_t >::isKnownGT(), llvm::details::FixedOrScalableQuantity< TypeSize, uint64_t >::isKnownLE(), llvm::details::FixedOrScalableQuantity< LeafTy, ValueTy >::isScalable(), LHS, llvm::Offset, and RHS.

Referenced by findFuncPointers(), llvm::DataLayout::getGEPIndexForOffset(), llvm::getPointerAtOffset(), getTypePartition(), splitGlobal(), and stripAggregateTypeWrapping().

◆ getElementOffset()

Definition at line 596 of file DataLayout.h.

References assert(), getMemberOffsets(), and Idx.

Referenced by llvm::GEPOperator::accumulateConstantOffset(), llvm::GEPOperator::collectOffset(), computeKnownBitsFromOperator(), llvm::computeValueLLTs(), llvm::ComputeValueVTs(), emitGlobalConstantImpl(), emitGlobalConstantStruct(), findFuncPointers(), getElementOffsetInBits(), llvm::TargetTransformInfoImplCRTPBase< T >::getGEPCost(), llvm::DataLayout::getGEPIndexForOffset(), llvm::DataLayout::getIndexedOffsetInType(), llvm::GEPOperator::getMaxPreservedAlignment(), llvm::ScalarEvolution::getOffsetOfExpr(), llvm::getPointerAtOffset(), getTypePartition(), llvm::ExecutionEngine::InitializeMemory(), isGEPKnownNonNull(), llvm::FastISel::selectGetElementPtr(), and splitGlobal().

◆ getElementOffsetInBits()

TypeSize llvm::StructLayout::getElementOffsetInBits ( unsigned Idx) const inline

◆ getMemberOffsets() [1/2]

◆ getMemberOffsets() [2/2]

◆ getSizeInBits()

TypeSize llvm::StructLayout::getSizeInBits ( ) const inline

◆ getSizeInBytes()

TypeSize llvm::StructLayout::getSizeInBytes ( ) const inline

◆ hasPadding()

bool llvm::StructLayout::hasPadding ( ) const inline

Returns whether the struct has padding or not between its fields.

NB: Padding in nested element is not taken into account.

Definition at line 582 of file DataLayout.h.

◆ DataLayout

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