Struct TargetInfo 

#[non_exhaustive]
pub struct TargetInfo {
    pub triple: Triple,
    pub pointer_width: u32,
    pub little_endian: bool,
    pub char_is_signed: bool,
    pub long_width: u32,
    pub long_double_width: u32,
    pub bit_int_granule: u32,
    pub object_format: ObjectFormat,
}

The facts about a target that the compiler reads instead of hard-coding.

This is the whole of what a pass is allowed to know about where its output will run. It grows, and every field added here is one fewer #[cfg] somewhere it should not be.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

triple: Triple

The triple this describes.

pointer_width: u32

Width of a pointer in bits.

little_endian: bool

Whether bytes are ordered little end first.

char_is_signed: bool

Whether a bare char is signed.

Signed on x86-64 and unsigned on AArch64 Linux, which is the classic source of code that works on one and not the other, so it is data rather than an assumption.

long_width: u32

Width of long in bits. This is the field that separates the LP64 world from Windows LLP64.

long_double_width: u32

Width of long double in bits: 80 bits of x87 stored in 128 on SysV x86-64, 64 on Apple platforms, 64 on Windows.

bit_int_granule: u32

The granule a _BitInt wider than 64 bits is laid out in, in bits.

Above 64 bits the psABIs stop treating a _BitInt like a standard integer type and start treating it like an array of these, so its size is rounded up to a multiple of this and its alignment is this. It is 64 on x86-64 and RISC-V and 128 on AArch64, which is why _BitInt(65) is sixteen bytes aligned to eight on one and sixteen bytes aligned to sixteen on the other. Measured with clang 18 on x86-64 Linux and clang on AArch64 Darwin rather than read off the documents.

object_format: ObjectFormat

The object format to emit.

Implementations

impl TargetInfo

pub fn new(triple: Triple) -> Self

The description of triple.

Trait Implementations

impl Clone for TargetInfo

fn clone(&self) -> TargetInfo

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TargetInfo

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for TargetInfo

impl PartialEq for TargetInfo

fn eq(&self, other: &TargetInfo) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for TargetInfo