Enum rustc_middle::mir::MirPhase[][src]

pub enum MirPhase {
    Build,
    Const,
    ConstPromotion,
    DropLowering,
    GeneratorLowering,
    Optimization,
}
Expand description

The various “big phases” that MIR goes through.

These phases all describe dialects of MIR. Since all MIR uses the same datastructures, the dialects forbid certain variants or values in certain phases.

Note: Each phase’s validation checks all invariants of the previous phases’ dialects. A phase that changes the dialect documents what invariants must be upheld after that phase finishes.

Warning: ordering of variants is significant.

Variants

Build
Const
ConstPromotion
Expand description

This phase checks the MIR for promotable elements and takes them out of the main MIR body by creating a new MIR body per promoted element. After this phase (and thus the termination of the mir_promoted query), these promoted elements are available in the promoted_mir query.

DropLowering
Expand description

After this phase

  • the only AggregateKinds allowed are Array and Generator,
  • DropAndReplace is gone for good
  • Drop now uses explicit drop flags visible in the MIR and reaching a Drop terminator means that the auto-generated drop glue will be invoked.
GeneratorLowering
Expand description

After this phase, generators are explicit state machines (no more Yield). AggregateKind::Generator is gone for good.

Optimization

Implementations

impl MirPhase[src]

pub fn phase_index(&self) -> usize[src]

Gets the index of the current MirPhase within the set of all MirPhases.

Trait Implementations

impl Clone for MirPhase[src]

fn clone(&self) -> MirPhase[src]

Returns a copy of the value. Read more

fn clone_from(&mut self, source: &Self)1.0.0[src]

Performs copy-assignment from source. Read more

impl Debug for MirPhase[src]

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

Formats the value using the given formatter. Read more

impl<'tcx, __D: TyDecoder<'tcx>> Decodable<__D> for MirPhase[src]

fn decode(__decoder: &mut __D) -> Result<Self, <__D as Decoder>::Error>[src]

impl<'tcx, __E: TyEncoder<'tcx>> Encodable<__E> for MirPhase[src]

fn encode(&self, __encoder: &mut __E) -> Result<(), <__E as Encoder>::Error>[src]

impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for MirPhase[src]

fn hash_stable(
    &self,
    __hcx: &mut StableHashingContext<'__ctx>,
    __hasher: &mut StableHasher
)
[src]

impl<'tcx> Lift<'tcx> for MirPhase[src]

type Lifted = Self

fn lift_to_tcx(self, _: TyCtxt<'tcx>) -> Option<Self>[src]

impl Ord for MirPhase[src]

fn cmp(&self, other: &MirPhase) -> Ordering[src]

This method returns an Ordering between self and other. Read more

#[must_use]
fn max(self, other: Self) -> Self
1.21.0[src]

Compares and returns the maximum of two values. Read more

#[must_use]
fn min(self, other: Self) -> Self
1.21.0[src]

Compares and returns the minimum of two values. Read more

#[must_use]
fn clamp(self, min: Self, max: Self) -> Self
1.50.0[src]

Restrict a value to a certain interval. Read more

impl PartialEq<MirPhase> for MirPhase[src]

fn eq(&self, other: &MirPhase) -> bool[src]

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

#[must_use]
fn ne(&self, other: &Rhs) -> bool
1.0.0[src]

This method tests for !=.

impl PartialOrd<MirPhase> for MirPhase[src]

fn partial_cmp(&self, other: &MirPhase) -> Option<Ordering>[src]

This method returns an ordering between self and other values if one exists. Read more

#[must_use]
fn lt(&self, other: &Rhs) -> bool
1.0.0[src]

This method tests less than (for self and other) and is used by the < operator. Read more

#[must_use]
fn le(&self, other: &Rhs) -> bool
1.0.0[src]

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

#[must_use]
fn gt(&self, other: &Rhs) -> bool
1.0.0[src]

This method tests greater than (for self and other) and is used by the > operator. Read more

#[must_use]
fn ge(&self, other: &Rhs) -> bool
1.0.0[src]

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

impl<'tcx> TypeFoldable<'tcx> for MirPhase[src]

fn super_fold_with<F: TypeFolder<'tcx>>(self, _: &mut F) -> MirPhase[src]

fn super_visit_with<F: TypeVisitor<'tcx>>(
    &self,
    _: &mut F
) -> ControlFlow<F::BreakTy>
[src]

fn fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self[src]

fn visit_with<V: TypeVisitor<'tcx>>(
    &self,
    visitor: &mut V
) -> ControlFlow<V::BreakTy>
[src]

fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool[src]

Returns true if self has any late-bound regions that are either bound by binder or bound by some binder outside of binder. If binder is ty::INNERMOST, this indicates whether there are any late-bound regions that appear free. Read more

fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool[src]

Returns true if this self has any regions that escape binder (and hence are not bound by it). Read more

fn has_escaping_bound_vars(&self) -> bool[src]

fn has_type_flags(&self, flags: TypeFlags) -> bool[src]

fn has_projections(&self) -> bool[src]

fn has_opaque_types(&self) -> bool[src]

fn references_error(&self) -> bool[src]

fn has_param_types_or_consts(&self) -> bool[src]

fn has_infer_regions(&self) -> bool[src]

fn has_infer_types(&self) -> bool[src]

fn has_infer_types_or_consts(&self) -> bool[src]

fn needs_infer(&self) -> bool[src]

fn has_placeholders(&self) -> bool[src]

fn needs_subst(&self) -> bool[src]

fn has_free_regions(&self) -> bool[src]

“Free” regions in this context means that it has any region that is not (a) erased or (b) late-bound. Read more

fn has_erased_regions(&self) -> bool[src]

fn has_erasable_regions(&self) -> bool[src]

True if there are any un-erased free regions.

fn is_global(&self) -> bool[src]

Indicates whether this value references only ‘global’ generic parameters that are the same regardless of what fn we are in. This is used for caching. Read more

fn has_late_bound_regions(&self) -> bool[src]

True if there are any late-bound regions

fn still_further_specializable(&self) -> bool[src]

Indicates whether this value still has parameters/placeholders/inference variables which could be replaced later, in a way that would change the results of impl specialization. Read more

impl Copy for MirPhase[src]

impl Eq for MirPhase[src]

impl StructuralEq for MirPhase[src]

impl StructuralPartialEq for MirPhase[src]

Auto Trait Implementations

impl RefUnwindSafe for MirPhase

impl Send for MirPhase

impl Sync for MirPhase

impl Unpin for MirPhase

impl UnwindSafe for MirPhase

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
[src]

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

impl<'tcx, T> ArenaAllocatable<'tcx, ()> for T where
    T: Copy
[src]

pub fn allocate_on(Self, &'a Arena<'tcx>) -> &'a mut T[src]

pub fn allocate_from_iter(
    &'a Arena<'tcx>,
    impl IntoIterator<Item = T>
) -> &'a mut [T]

Notable traits for &'_ [u8]

impl<'_> Read for &'_ [u8]impl<'_> Write for &'_ mut [u8]
[src]

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

impl<T> From<T> for T[src]

pub fn from(t: T) -> T[src]

Performs the conversion.

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

pub fn into(self) -> U[src]

Performs the conversion.

impl<T> MaybeResult<T> for T[src]

type Error = !

pub fn from(Result<T, <T as MaybeResult<T>>::Error>) -> T[src]

pub fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>[src]

impl<'tcx, T> Subst<'tcx> for T where
    T: TypeFoldable<'tcx>, 
[src]

pub fn subst_spanned(Self, TyCtxt<'tcx>, &[GenericArg<'tcx>], Option<Span>) -> T[src]

fn subst(self, tcx: TyCtxt<'tcx>, substs: &[GenericArg<'tcx>]) -> Self[src]

impl<T> ToOwned for T where
    T: Clone
[src]

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T[src]

Creates owned data from borrowed data, usually by cloning. Read more

pub fn clone_into(&self, target: &mut T)[src]

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]

Performs the conversion.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

Performs the conversion.

impl<T> WithConstness for T[src]

fn with_constness(self, constness: Constness) -> ConstnessAnd<Self>[src]

fn with_const(self) -> ConstnessAnd<Self>[src]

fn without_const(self) -> ConstnessAnd<Self>[src]

impl<'a, T> Captures<'a> for T where
    T: ?Sized
[src]