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 712 of file DataLayout.h.

Member Function Documentation

getAlignment()

Align llvm::StructLayout::getAlignment ( ) const

inline

Definition at line 725 of file DataLayout.h.

Referenced by llvm::DataLayout::getTypeAllocSize().

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::Offset, 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 743 of file DataLayout.h.

References assert(), and getMemberOffsets().

Referenced by llvm::GEPOperator::accumulateConstantOffset(), llvm::GEPOperator::collectOffset(), computeKnownBitsFromOperator(), llvm::computeValueLLTs(), llvm::ComputeValueTypes(), llvm::decomposeLinearExpression(), emitGlobalConstantImpl(), emitGlobalConstantStruct(), findFuncPointers(), getElementOffsetInBits(), llvm::DataLayout::getGEPIndexForOffset(), llvm::DataLayout::getIndexedOffsetInType(), llvm::GEPOperator::getMaxPreservedAlignment(), llvm::ScalarEvolution::getOffsetOfExpr(), llvm::getPointerAtOffset(), getTypePartition(), llvm::ExecutionEngine::InitializeMemory(), isGEPKnownNonNull(), and splitGlobal().

getElementOffsetInBits()

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

inline

Definition at line 748 of file DataLayout.h.

References getElementOffset().

Referenced by isDenselyPacked(), and solveDIType().

getMemberOffsets() [1/2]

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

inline

Definition at line 735 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 739 of file DataLayout.h.

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

getSizeInBits()

TypeSize llvm::StructLayout::getSizeInBits ( ) const

inline

Definition at line 723 of file DataLayout.h.

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

getSizeInBytes()

TypeSize llvm::StructLayout::getSizeInBytes ( ) const

inline

Definition at line 721 of file DataLayout.h.

Referenced by emitGlobalConstantStruct(), llvm::DataLayout::getGEPIndexForOffset(), llvm::getPointerAtOffset(), llvm::DataLayout::getTypeAllocSize(), 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 729 of file DataLayout.h.

Friends And Related Symbol Documentation

DataLayout

friend class DataLayout

friend

Definition at line 753 of file DataLayout.h.

References DataLayout, and DL.

Referenced by DataLayout.

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

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