Class DataLayout

Provides access to LLVM target data layout information

Inheritance

Object

DataLayout

Inherited Members

Object.Equals(Object)

Object.Equals(Object, Object)

Object.GetHashCode()

Object.GetType()

Object.MemberwiseClone()

Object.ReferenceEquals(Object, Object)

Namespace: Llvm.NET

Assembly: Llvm.NET.dll

Syntax

public sealed class DataLayout

Remarks

There is a distinction between various sizes and alignment for a given type that are target dependent.

The following table illustrates the differences in sizes and their meaning for a sample set of types.

Type	SizeInBits	StoreSizeInBits	AbiSizeInBits
i1	1	8	8
i8	8	8	8
i19	19	24	32
i32	32	32	32
i10	100	104	128
i128	128	128	128
Float	32	32	32
Double	64	64	64
X86_FP80	80	80	96

note

The allocation size depends on the alignment, and thus on the target. The values in the example table are for x86-32-linux.

Property	Definition
SizeInBits	Minimum number of bits needed to represent the full range of values for the type
StoreSizeInBits	Minimum number of bits needed to actually store a single value of the type
AbiSizeInBits	Total number of bits used to store a value in a sequence, including any alignment padding

The allocation size determines the total size of each entry in a sequence so that the "next" element is computed by adding the size to the start address of the current element.

Properties

Endianess	Gets the byte ordering for this target

Methods

AbiAlignmentOf(ITypeRef)	Retrieves the ABI specified alignment, in bytes, for a specified type
AbiBitAlignmentOf(ITypeRef)	Gets the ABI alignment of the type in bits
AbiSizeOf(ITypeRef)	Retrieves the ABI specified size of the given type
BitOffsetOfElement(IStructType, UInt32)	Gets the offset of a structure element in bits
BitSizeOf(ITypeRef)	Returns the number of bits necessary to hold the specified type.
ByteSizeOf(ITypeRef)	Gets the byte size of a type
CallFrameAlignmentOf(ITypeRef)	Retrieves the call frame alignment for a given type
ElementAtOffset(IStructType, UInt64)	Gets the element index for a specific offset in a given structure
IntPtrType(Context)	Retrieves an LLVM integer type with the same bit width as a pointer for the default address space of the target
IntPtrType(Context, UInt32)	Retrieves an LLVM integer type with the same bit width as a pointer for the given address space of the target
OffsetOfElement(IStructType, UInt32)	Gets the offset of an element in a structure
PointerSize()	Gets the size of a pointer for the default address space of the target
PointerSize(UInt32)	Retrieves the size of a pointer for a given address space of the target
PreferredAlignmentOf(ITypeRef)	Gets the preferred alignment for an LLVM type
PreferredAlignmentOf(Value)	Gets the preferred alignment for a Value
PreferredBitAlignmentOf(ITypeRef)	Gets the preferred alignment of the type in bits
StoreSizeOf(ITypeRef)	Retrieves the number of bits required to store a value of the given type
ToString()