Enum cranelift_codegen::ir::FrameLayoutChange

pub enum FrameLayoutChange {
    CallFrameAddressAt {
        reg: RegUnit,
        offset: isize,
    },
    RegAt {
        reg: RegUnit,
        cfa_offset: isize,
    },
    ReturnAddressAt {
        cfa_offset: isize,
    },
    Preserve,
    Restore,
}

Change in the frame layout information.

Variants

CallFrameAddressAt

Base CallFrameAddress (CFA) pointer moved to different register/offset.

Fields of CallFrameAddressAt

reg: RegUnit

CFA register.

offset: isize

CFA offset.

RegAt

Register saved at.

Fields of RegAt

reg: RegUnit

Saved register.

cfa_offset: isize

Offset in the frame (offset from CFA).

ReturnAddressAt

Return address saved at.

Fields of ReturnAddressAt

cfa_offset: isize

Offset in the frame (offset from CFA).

Preserve

The entire frame layout must be preserved somewhere to be restored at a corresponding Restore change.

This likely maps to the DWARF call frame instruction .cfa_remember_state.

Restore

Restore the entire frame layout from a corresponding prior Preserve frame change.

This likely maps to the DWARF call frame instruction .cfa_restore_state.

Trait Implementations

impl Clone for FrameLayoutChange

fn clone(&self) -> FrameLayoutChange

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for FrameLayoutChange

impl Debug for FrameLayoutChange

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

Formats the value using the given formatter.

impl Eq for FrameLayoutChange

impl Hash for FrameLayoutChange

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, 

Feeds a slice of this type into the given [Hasher].

impl PartialEq<FrameLayoutChange> for FrameLayoutChange

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl StructuralEq for FrameLayoutChange

impl StructuralPartialEq for FrameLayoutChange