Struct rustc_mir_dataflow::impls::MaybeLiveLocals
source · pub struct MaybeLiveLocals;
Expand description
A live-variable dataflow analysis.
This analysis considers references as being used only at the point of the
borrow. In other words, this analysis does not track uses because of references that already
exist. See this mir-dataflow
test for an example. You almost never want to use
this analysis without also looking at the results of MaybeBorrowedLocals
.
Field-(in)sensitivity
As the name suggests, this analysis is field insensitive. If a projection of a variable x
is
assigned to (e.g. x.0 = 42
), it does not “define” x
as far as liveness is concerned. In fact,
such an assignment is currently marked as a “use” of x
in an attempt to be maximally
conservative.
Trait Implementations§
source§impl<'tcx> AnalysisDomain<'tcx> for MaybeLiveLocals
impl<'tcx> AnalysisDomain<'tcx> for MaybeLiveLocals
§type Domain = ChunkedBitSet<Local>
type Domain = ChunkedBitSet<Local>
source§const NAME: &'static str = "liveness"
const NAME: &'static str = "liveness"
source§fn bottom_value(&self, body: &Body<'tcx>) -> Self::Domain
fn bottom_value(&self, body: &Body<'tcx>) -> Self::Domain
source§impl Clone for MaybeLiveLocals
impl Clone for MaybeLiveLocals
source§fn clone(&self) -> MaybeLiveLocals
fn clone(&self) -> MaybeLiveLocals
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl<'tcx> GenKillAnalysis<'tcx> for MaybeLiveLocals
impl<'tcx> GenKillAnalysis<'tcx> for MaybeLiveLocals
type Idx = Local
fn domain_size(&self, body: &Body<'tcx>) -> usize
source§fn statement_effect(
&mut self,
trans: &mut impl GenKill<Self::Idx>,
statement: &Statement<'tcx>,
location: Location
)
fn statement_effect( &mut self, trans: &mut impl GenKill<Self::Idx>, statement: &Statement<'tcx>, location: Location )
Analysis::apply_statement_effect
.source§fn terminator_effect<'mir>(
&mut self,
trans: &mut Self::Domain,
terminator: &'mir Terminator<'tcx>,
location: Location
) -> TerminatorEdges<'mir, 'tcx>
fn terminator_effect<'mir>( &mut self, trans: &mut Self::Domain, terminator: &'mir Terminator<'tcx>, location: Location ) -> TerminatorEdges<'mir, 'tcx>
Analysis::apply_terminator_effect
.source§fn call_return_effect(
&mut self,
trans: &mut impl GenKill<Self::Idx>,
_block: BasicBlock,
return_places: CallReturnPlaces<'_, 'tcx>
)
fn call_return_effect( &mut self, trans: &mut impl GenKill<Self::Idx>, _block: BasicBlock, return_places: CallReturnPlaces<'_, 'tcx> )
Analysis::apply_call_return_effect
.source§fn before_statement_effect(
&mut self,
_trans: &mut impl GenKill<Self::Idx>,
_statement: &Statement<'tcx>,
_location: Location
)
fn before_statement_effect( &mut self, _trans: &mut impl GenKill<Self::Idx>, _statement: &Statement<'tcx>, _location: Location )
Analysis::apply_before_statement_effect
.source§fn before_terminator_effect(
&mut self,
_trans: &mut impl GenKill<Self::Idx>,
_terminator: &Terminator<'tcx>,
_location: Location
)
fn before_terminator_effect( &mut self, _trans: &mut impl GenKill<Self::Idx>, _terminator: &Terminator<'tcx>, _location: Location )
Analysis::apply_before_terminator_effect
.source§fn switch_int_edge_effects<G: GenKill<Self::Idx>>(
&mut self,
_block: BasicBlock,
_discr: &Operand<'tcx>,
_edge_effects: &mut impl SwitchIntEdgeEffects<G>
)
fn switch_int_edge_effects<G: GenKill<Self::Idx>>( &mut self, _block: BasicBlock, _discr: &Operand<'tcx>, _edge_effects: &mut impl SwitchIntEdgeEffects<G> )
Analysis::apply_switch_int_edge_effects
.source§impl<'tcx> RustcPeekAt<'tcx> for MaybeLiveLocals
impl<'tcx> RustcPeekAt<'tcx> for MaybeLiveLocals
impl Copy for MaybeLiveLocals
Auto Trait Implementations§
impl RefUnwindSafe for MaybeLiveLocals
impl Send for MaybeLiveLocals
impl Sync for MaybeLiveLocals
impl Unpin for MaybeLiveLocals
impl UnwindSafe for MaybeLiveLocals
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<'tcx, A> CloneAnalysis for Awhere
A: Analysis<'tcx> + Copy,
impl<'tcx, A> CloneAnalysis for Awhere A: Analysis<'tcx> + Copy,
fn clone_analysis(&self) -> A
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: 0 bytes