pub(super) struct RWUTable {
live_nodes: usize,
vars: usize,
words: Vec<u8>,
live_node_words: usize,
}
Expand description
Conceptually, this is like a Vec<Vec<RWU>>
. But the number of
RWU`s can get very large, so it uses a more compact representation.
Fields
live_nodes: usize
Total number of live nodes.
vars: usize
Total number of variables.
words: Vec<u8>
A compressed representation of RWU
s.
Each word represents 2 different RWU
s packed together. Each packed RWU
is stored in 4 bits: a reader bit, a writer bit, a used bit and a
padding bit.
The data for each live node is contiguous and starts at a word boundary, so there might be an unused space left.
live_node_words: usize
Number of words per each live node.
Implementations
sourceimpl RWUTable
impl RWUTable
const RWU_READER: u8 = 1u8
const RWU_WRITER: u8 = 2u8
const RWU_USED: u8 = 4u8
const RWU_MASK: u8 = 15u8
sourceconst WORD_RWU_COUNT: usize = 2usize
const WORD_RWU_COUNT: usize = 2usize
Number of packed RWUs that fit into a single word.
pub(super) fn new(live_nodes: usize, vars: usize) -> RWUTable
fn word_and_shift(&self, ln: LiveNode, var: Variable) -> (usize, u32)
fn pick2_rows_mut(&mut self, a: LiveNode, b: LiveNode) -> (&mut [u8], &mut [u8])
pub(super) fn copy(&mut self, dst: LiveNode, src: LiveNode)
sourcepub(super) fn union(&mut self, dst: LiveNode, src: LiveNode) -> bool
pub(super) fn union(&mut self, dst: LiveNode, src: LiveNode) -> bool
Sets dst
to the union of dst
and src
, returns true if dst
was
changed.
pub(super) fn get_reader(&self, ln: LiveNode, var: Variable) -> bool
pub(super) fn get_writer(&self, ln: LiveNode, var: Variable) -> bool
pub(super) fn get_used(&self, ln: LiveNode, var: Variable) -> bool
pub(super) fn get(&self, ln: LiveNode, var: Variable) -> RWU
pub(super) fn set(&mut self, ln: LiveNode, var: Variable, rwu: RWU)
Auto Trait Implementations
impl RefUnwindSafe for RWUTable
impl Send for RWUTable
impl Sync for RWUTable
impl Unpin for RWUTable
impl UnwindSafe for RWUTable
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Layout
Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...)
attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.
Size: 48 bytes