Struct cranelift_codegen::machinst::lower::InstColor

pub struct InstColor(_);

An “instruction color” partitions CLIF instructions by side-effecting ops. All instructions with the same “color” are guaranteed not to be separated by any side-effecting op (for this purpose, loads are also considered side-effecting, to avoid subtle questions w.r.t. the memory model), and furthermore, it is guaranteed that for any two instructions A and B such that color(A) == color(B), either A dominates B and B postdominates A, or vice-versa. (For now, in practice, only ops in the same basic block can ever have the same color, trivially providing the second condition.) Intuitively, this means that the ops of the same color must always execute “together”, as part of one atomic contiguous section of the dynamic execution trace, and they can be freely permuted (modulo true dataflow dependencies) without affecting program behavior.

Implementations

impl InstColor

pub fn get(self) -> u32

Get an arbitrary index representing this color. The index is unique within a single function compilation, but indices may be reused across functions.

Trait Implementations

impl Clone for InstColor

fn clone(&self) -> InstColor

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for InstColor

impl Debug for InstColor

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

Formats the value using the given formatter.

impl Eq for InstColor

impl Hash for InstColor

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

Feeds this value into the given Hasher.

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

Feeds a slice of this type into the given Hasher.

impl PartialEq<InstColor> for InstColor

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

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

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

This method tests for !=.

impl StructuralEq for InstColor

impl StructuralPartialEq for InstColor