Struct rustc_mir_dataflow::impls::MaybeRequiresStorage

pub struct MaybeRequiresStorage<'mir, 'tcx> {
    body: &'mir Body<'tcx>,
    borrowed_locals: RefCell<ResultsRefCursor<'mir, 'mir, 'tcx, MaybeBorrowedLocals>>,
}

Dataflow analysis that determines whether each local requires storage at a given location; i.e. whether its storage can go away without being observed.

Fields

body: &'mir Body<'tcx>

borrowed_locals: RefCell<ResultsRefCursor<'mir, 'mir, 'tcx, MaybeBorrowedLocals>>

Implementations

impl<'mir, 'tcx> MaybeRequiresStorage<'mir, 'tcx>

pub fn new(
    body: &'mir Body<'tcx>,
    borrowed_locals: &'mir Results<'tcx, MaybeBorrowedLocals>
) -> Self

impl<'mir, 'tcx> MaybeRequiresStorage<'mir, 'tcx>

fn check_for_move(&self, trans: &mut impl GenKill<Local>, loc: Location)

Kill locals that are fully moved and have not been borrowed.

Trait Implementations

impl<'mir, 'tcx> AnalysisDomain<'tcx> for MaybeRequiresStorage<'mir, 'tcx>

type Domain = BitSet<Local>

The type that holds the dataflow state at any given point in the program.

const NAME: &'static str = "requires_storage"

A descriptive name for this analysis. Used only for debugging.

fn bottom_value(&self, body: &Body<'tcx>) -> Self::Domain

Returns the initial value of the dataflow state upon entry to each basic block.

fn initialize_start_block(&self, body: &Body<'tcx>, on_entry: &mut Self::Domain)

Mutates the initial value of the dataflow state upon entry to the START_BLOCK.

type Direction = Forward

The direction of this analysis. Either Forward or Backward.

impl<'mir, 'tcx> GenKillAnalysis<'tcx> for MaybeRequiresStorage<'mir, 'tcx>

type Idx = Local

fn before_statement_effect(
    &self,
    trans: &mut impl GenKill<Self::Idx>,
    stmt: &Statement<'tcx>,
    loc: Location
)

See Analysis::apply_before_statement_effect.

fn statement_effect(
    &self,
    trans: &mut impl GenKill<Self::Idx>,
    _: &Statement<'tcx>,
    loc: Location
)

See Analysis::apply_statement_effect.

fn before_terminator_effect(
    &self,
    trans: &mut impl GenKill<Self::Idx>,
    terminator: &Terminator<'tcx>,
    loc: Location
)

See Analysis::apply_before_terminator_effect.

fn terminator_effect(
    &self,
    trans: &mut impl GenKill<Self::Idx>,
    terminator: &Terminator<'tcx>,
    loc: Location
)

See Analysis::apply_terminator_effect.

fn call_return_effect(
    &self,
    trans: &mut impl GenKill<Self::Idx>,
    _block: BasicBlock,
    return_places: CallReturnPlaces<'_, 'tcx>
)

See Analysis::apply_call_return_effect.

fn yield_resume_effect(
    &self,
    trans: &mut impl GenKill<Self::Idx>,
    _resume_block: BasicBlock,
    resume_place: Place<'tcx>
)

See Analysis::apply_yield_resume_effect.

fn switch_int_edge_effects<G: GenKill<Self::Idx>>(
    &self,
    _block: BasicBlock,
    _discr: &Operand<'tcx>,
    _edge_effects: &mut impl SwitchIntEdgeEffects<G>
)

See Analysis::apply_switch_int_edge_effects.

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: 128 bytes