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 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 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 of a pointer for the default address space of the target

PointerSize(uint): 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

ToLazyEncodedString(): Gets the string representation of this data layout as a LazyEncodedString

Table of Contents

Interface IDataLayout

Remarks

note

Properties

Methods