Interface IDataLayout

Namespace: Ubiquity.NET.Llvm

Assembly: Ubiquity.NET.Llvm.dll

Provides access to LLVM target data layout information

public interface IDataLayout

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

Endianness: 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 (in bytes) of the given type

BitOffsetOfElement(IStructType, uint): 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 (in bytes) for a given type

ElementAtOffset(IStructType, ulong): Gets the element index for a specific offset in a given structure

IntPtrType(IContext): Retrieves an LLVM integer type with the same bit width as a pointer for the default address space of the target

IntPtrType(IContext, uint): Retrieves an LLVM integer type with the same bit width as a pointer for the given address space of the target

OffsetOfElement(IStructType, uint): Gets the offset of an element in a structure

PointerSize(): Gets the size (in bytes) of a pointer for the default address space of the target

PointerSize(uint): Retrieves the size (in bytes) of a pointer for a given address space of the target

PreferredAlignmentOf(ITypeRef): Gets the preferred alignment (in bytes) for an LLVM type

PreferredAlignmentOf(Value): Gets the preferred alignment (in bytes) 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

ToLazyEncodedString(): Gets the string representation of this data layout as a Ubiquity.NET.InteropHelpers.LazyEncodedString

Table of Contents

Interface IDataLayout

Remarks

note

Properties

Methods