llvm::StructLayout Class Reference

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

#include "llvm/IR/DataLayout.h"

Inheritance diagram for llvm::StructLayout:

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.
LLVM_ABI 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

Friends
class	DataLayout

Detailed Description

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

Definition at line 626 of file DataLayout.h.

Member Function Documentation

getAlignment()

Align llvm::StructLayout::getAlignment ( ) const

inline

Definition at line 639 of file DataLayout.h.

getElementContainingOffset()

unsigned StructLayout::getElementContainingOffset

(

uint64_t

FixedOffset

)

const

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< TypeSize, uint64_t >::isKnownLT(), llvm::details::FixedOrScalableQuantity< LeafTy, ValueTy >::isScalable(), LHS, llvm::Offset, RHS, and llvm::upper_bound().

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

getElementOffset()

TypeSize llvm::StructLayout::getElementOffset ( unsigned  Idx ) const

inline

Definition at line 657 of file DataLayout.h.

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

Referenced by llvm::GEPOperator::accumulateConstantOffset(), llvm::GEPOperator::collectOffset(), computeKnownBitsFromOperator(), llvm::computeValueLLTs(), llvm::ComputeValueTypes(), 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

Definition at line 662 of file DataLayout.h.

References getElementOffset(), and Idx.

Referenced by isDenselyPacked(), and solveDIType().

getMemberOffsets() [1/2]

MutableArrayRef< TypeSize > llvm::StructLayout::getMemberOffsets ( )

inline

Definition at line 649 of file DataLayout.h.

References llvm::TrailingObjects< StructLayout, TypeSize >::getTrailingObjects().

Referenced by getElementContainingOffset(), getElementOffset(), and splitGlobal().

getMemberOffsets() [2/2]

ArrayRef< TypeSize > llvm::StructLayout::getMemberOffsets ( ) const

inline

Definition at line 653 of file DataLayout.h.

References llvm::TrailingObjects< StructLayout, TypeSize >::getTrailingObjects().

getSizeInBits()

TypeSize llvm::StructLayout::getSizeInBits ( ) const

inline

Definition at line 637 of file DataLayout.h.

Referenced by llvm::ScalarEvolution::getOffsetOfExpr(), getTypePartition(), and llvm::DataLayout::getTypeSizeInBits().

getSizeInBytes()

TypeSize llvm::StructLayout::getSizeInBytes ( ) const

inline

Definition at line 635 of file DataLayout.h.

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

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 643 of file DataLayout.h.

Friends And Related Function Documentation

DataLayout

friend class DataLayout

friend

Definition at line 667 of file DataLayout.h.

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

• include/llvm/IR/DataLayout.h
• lib/IR/DataLayout.cpp