Enum FrameError 

#[non_exhaustive]
pub enum FrameError {
    TooLarge,
    Alignment {
        slot: StackSlot,
        align: u32,
    },
    OverlappingIncoming {
        slot: StackSlot,
    },
}

Why a frame could not be laid out.

Examples

use backend_lang::mir::{Function, SlotKind};
use backend_lang::target::frame::FrameError;
use backend_lang::x86_64::SYSV;

let mut f = Function::new("f", &SYSV);
let slot = f.stack_slot(SlotKind::Local { size: 32, align: 32 })?;
assert_eq!(f.frame_layout().unwrap_err(), FrameError::Alignment { slot, align: 32 });

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

TooLarge

The frame, or an offset into it, exceeds the 32-bit displacement instructions address it with. Move large data to the heap.

Alignment

A slot’s alignment is zero, not a power of two, or larger than the ABI’s stack alignment (16), which the fixed frame cannot provide without realigning the stack.

Fields

slot: StackSlot

The slot.

align: u32

Its alignment.

OverlappingIncoming

Two incoming slots overlap; each names a distinct stack argument.

Fields

slot: StackSlot

The second of the two slots.

Trait Implementations

impl Clone for FrameError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FrameError

impl Debug for FrameError

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

Formats the value using the given formatter.

impl Display for FrameError

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

Formats the value using the given formatter.

impl Eq for FrameError

impl Error for FrameError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<FrameError> for EmitError

fn from(e: FrameError) -> EmitError

Converts to this type from the input type.

impl Hash for FrameError

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for FrameError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for FrameError