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"

Public Member Functions
uint64_t	getSizeInBytes () const
uint64_t	getSizeInBits () const
unsigned	getAlignment () const
bool	hasPadding () const
	Returns whether the struct has padding or not between its fields. More...
unsigned	getElementContainingOffset (uint64_t Offset) const
	Given a valid byte offset into the structure, returns the structure index that contains it. More...
uint64_t	getElementOffset (unsigned Idx) const
uint64_t	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 529 of file DataLayout.h.

Member Function Documentation

getAlignment()

unsigned llvm::StructLayout::getAlignment ( ) const

inline

Definition at line 541 of file DataLayout.h.

Referenced by llvm::DataLayout::getABITypeAlignment(), llvm::DataLayout::getIndexTypeSizeInBits(), and llvm::DataLayout::getPrefTypeAlignment().

getElementContainingOffset()

unsigned StructLayout::getElementContainingOffset

(

uint64_t

Offset

)

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 84 of file DataLayout.cpp.

References assert(), SI, and llvm::upper_bound().

Referenced by llvm::ConstantFoldLoadFromConstPtr(), llvm::ConstantFoldLoadThroughBitcast(), foldOperationIntoPhiValue(), getNaturalGEPRecursively(), getTypePartition(), llvm::WholeProgramDevirtPass::run(), and stripAggregateTypeWrapping().

getElementOffset()

uint64_t llvm::StructLayout::getElementOffset ( unsigned  Idx ) const

inline

Definition at line 551 of file DataLayout.h.

References assert().

Referenced by llvm::GEPOperator::accumulateConstantOffset(), aliasSameBasePointerGEPs(), CC_MipsO32_FP64(), computeKnownBitsFromOperator(), computeValueLLTs(), llvm::ComputeValueVTs(), llvm::ConstantFoldLoadThroughBitcast(), ConvertDoubleToBytes(), llvm::createEfficiencySanitizerPass(), llvm::EmitGEPOffset(), emitGlobalConstantStruct(), evaluateGEPOffsetExpression(), foldOperationIntoPhiValue(), getComparePred(), llvm::TargetTransformInfoImplCRTPBase< AMDGPUTTIImpl >::getGEPCost(), llvm::DataLayout::getIndexedOffsetInType(), getMaxPointerSize(), getNaturalGEPRecursively(), GetOffsetFromIndex(), getTypePartition(), llvm::ExecutionEngine::InitializeMemory(), isGEPKnownNonNull(), isMulPowOf2(), isPromotedInstructionLegal(), llvm::WholeProgramDevirtPass::run(), AllocaSlices::SliceBuilder::SliceBuilder(), splitGlobal(), SRAGlobal(), and llvm::Interpreter::visitAllocaInst().

getElementOffsetInBits()

uint64_t llvm::StructLayout::getElementOffsetInBits ( unsigned  Idx ) const

inline

Definition at line 556 of file DataLayout.h.

Referenced by SRAGlobal().

getSizeInBits()

uint64_t llvm::StructLayout::getSizeInBits ( ) const

inline

Definition at line 539 of file DataLayout.h.

getSizeInBytes()

uint64_t llvm::StructLayout::getSizeInBytes ( ) const

inline

Definition at line 537 of file DataLayout.h.

Referenced by aliasSameBasePointerGEPs(), computeArraySize(), llvm::createEfficiencySanitizerPass(), emitGlobalConstantStruct(), foldOperationIntoPhiValue(), getNaturalGEPRecursively(), getTypePartition(), PerformHeapAllocSRoA(), llvm::WholeProgramDevirtPass::run(), splitGlobal(), and tryToOptimizeStoreOfMallocToGlobal().

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 545 of file DataLayout.h.

Friends And Related Function Documentation

DataLayout

friend class DataLayout

friend

Definition at line 561 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