Struct rustc_middle::mir::BasicBlock
source · pub struct BasicBlock {
private: u32,
}
Expand description
A node in the MIR control-flow graph.
There are no branches (e.g., if
s, function calls, etc.) within a basic block, which makes
it easier to do data-flow analyses and optimizations. Instead, branches are represented
as an edge in a graph between basic blocks.
Basic blocks consist of a series of statements, ending with a
terminator. Basic blocks can have multiple predecessors and successors,
however there is a MIR pass (CriticalCallEdges
) that removes critical edges, which
are edges that go from a multi-successor node to a multi-predecessor node. This pass is
needed because some analyses require that there are no critical edges in the CFG.
Note that this type is just an index into Body.basic_blocks
;
the actual data that a basic block holds is in BasicBlockData
.
Read more about basic blocks in the rustc-dev-guide.
Fields§
§private: u32
Implementations§
source§impl BasicBlock
impl BasicBlock
sourcepub const MAX_AS_U32: u32 = 4_294_967_040u32
pub const MAX_AS_U32: u32 = 4_294_967_040u32
Maximum value the index can take, as a u32
.
sourcepub const fn from_usize(value: usize) -> Self
pub const fn from_usize(value: usize) -> Self
sourcepub const unsafe fn from_u32_unchecked(value: u32) -> Self
pub const unsafe fn from_u32_unchecked(value: u32) -> Self
Creates a new index from a given u32
.
Safety
The provided value must be less than or equal to the maximum value for the newtype. Providing a value outside this range is undefined due to layout restrictions.
Prefer using from_u32
.
source§impl BasicBlock
impl BasicBlock
pub fn start_location(self) -> Location
Trait Implementations§
source§impl Add<usize> for BasicBlock
impl Add<usize> for BasicBlock
source§impl Clone for BasicBlock
impl Clone for BasicBlock
source§fn clone(&self) -> BasicBlock
fn clone(&self) -> BasicBlock
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for BasicBlock
impl Debug for BasicBlock
source§impl From<BasicBlock> for u32
impl From<BasicBlock> for u32
source§fn from(v: BasicBlock) -> u32
fn from(v: BasicBlock) -> u32
source§impl From<BasicBlock> for usize
impl From<BasicBlock> for usize
source§fn from(v: BasicBlock) -> usize
fn from(v: BasicBlock) -> usize
source§impl From<u32> for BasicBlock
impl From<u32> for BasicBlock
source§impl From<usize> for BasicBlock
impl From<usize> for BasicBlock
source§impl Hash for BasicBlock
impl Hash for BasicBlock
source§impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for BasicBlock
impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for BasicBlock
fn hash_stable( &self, __hcx: &mut StableHashingContext<'__ctx>, __hasher: &mut StableHasher )
source§impl Idx for BasicBlock
impl Idx for BasicBlock
source§impl<'tcx> Index<BasicBlock> for Body<'tcx>
impl<'tcx> Index<BasicBlock> for Body<'tcx>
§type Output = BasicBlockData<'tcx>
type Output = BasicBlockData<'tcx>
source§fn index(&self, index: BasicBlock) -> &BasicBlockData<'tcx>
fn index(&self, index: BasicBlock) -> &BasicBlockData<'tcx>
container[index]
) operation. Read moresource§impl<'tcx> IndexMut<BasicBlock> for Body<'tcx>
impl<'tcx> IndexMut<BasicBlock> for Body<'tcx>
source§fn index_mut(&mut self, index: BasicBlock) -> &mut BasicBlockData<'tcx>
fn index_mut(&mut self, index: BasicBlock) -> &mut BasicBlockData<'tcx>
container[index]
) operation. Read moresource§impl Ord for BasicBlock
impl Ord for BasicBlock
source§fn cmp(&self, other: &BasicBlock) -> Ordering
fn cmp(&self, other: &BasicBlock) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere Self: Sized,
source§impl PartialEq<BasicBlock> for BasicBlock
impl PartialEq<BasicBlock> for BasicBlock
source§fn eq(&self, other: &BasicBlock) -> bool
fn eq(&self, other: &BasicBlock) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl PartialOrd<BasicBlock> for BasicBlock
impl PartialOrd<BasicBlock> for BasicBlock
source§fn partial_cmp(&self, other: &BasicBlock) -> Option<Ordering>
fn partial_cmp(&self, other: &BasicBlock) -> Option<Ordering>
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moresource§impl Step for BasicBlock
impl Step for BasicBlock
source§fn steps_between(start: &Self, end: &Self) -> Option<usize>
fn steps_between(start: &Self, end: &Self) -> Option<usize>
step_trait
)source§fn forward_checked(start: Self, u: usize) -> Option<Self>
fn forward_checked(start: Self, u: usize) -> Option<Self>
step_trait
)source§fn backward_checked(start: Self, u: usize) -> Option<Self>
fn backward_checked(start: Self, u: usize) -> Option<Self>
step_trait
)source§fn forward(start: Self, count: usize) -> Self
fn forward(start: Self, count: usize) -> Self
step_trait
)source§unsafe fn forward_unchecked(start: Self, count: usize) -> Self
unsafe fn forward_unchecked(start: Self, count: usize) -> Self
step_trait
)source§fn backward(start: Self, count: usize) -> Self
fn backward(start: Self, count: usize) -> Self
step_trait
)source§unsafe fn backward_unchecked(start: Self, count: usize) -> Self
unsafe fn backward_unchecked(start: Self, count: usize) -> Self
step_trait
)source§impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for BasicBlock
impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for BasicBlock
source§fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>(
self,
_: &mut F
) -> Result<Self, F::Error>
fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F ) -> Result<Self, F::Error>
source§impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for BasicBlock
impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for BasicBlock
source§fn visit_with<F: TypeVisitor<TyCtxt<'tcx>>>(
&self,
_: &mut F
) -> ControlFlow<F::BreakTy>
fn visit_with<F: TypeVisitor<TyCtxt<'tcx>>>( &self, _: &mut F ) -> ControlFlow<F::BreakTy>
impl Copy for BasicBlock
impl Eq for BasicBlock
impl StructuralEq for BasicBlock
impl StructuralPartialEq for BasicBlock
impl TrustedStep for BasicBlock
Auto Trait Implementations§
impl RefUnwindSafe for BasicBlock
impl Send for BasicBlock
impl Sync for BasicBlock
impl Unpin for BasicBlock
impl UnwindSafe for BasicBlock
Blanket Implementations§
source§impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere T: Copy,
fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T
fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T> ) -> &'a mut [T]
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<T, R> CollectAndApply<T, R> for T
impl<T, R> CollectAndApply<T, R> for T
source§impl<Tcx, T> DepNodeParams<Tcx> for Twhere
Tcx: DepContext,
T: for<'a> HashStable<StableHashingContext<'a>> + Debug,
impl<Tcx, T> DepNodeParams<Tcx> for Twhere Tcx: DepContext, T: for<'a> HashStable<StableHashingContext<'a>> + Debug,
default fn fingerprint_style() -> FingerprintStyle
source§default fn to_fingerprint(&self, tcx: Tcx) -> Fingerprint
default fn to_fingerprint(&self, tcx: Tcx) -> Fingerprint
default fn to_debug_str(&self, _: Tcx) -> String
source§default fn recover(_: Tcx, _: &DepNode) -> Option<T>
default fn recover(_: Tcx, _: &DepNode) -> Option<T>
DepNode
,
something which is needed when forcing DepNode
s during red-green
evaluation. The query system will only call this method if
fingerprint_style()
is not FingerprintStyle::Opaque
.
It is always valid to return None
here, in which case incremental
compilation will treat the query as having changed instead of forcing it.source§impl<P> IntoQueryParam<P> for P
impl<P> IntoQueryParam<P> for P
fn into_query_param(self) -> P
source§impl<'tcx, T> IsSuggestable<'tcx> for Twhere
T: TypeVisitable<TyCtxt<'tcx>> + TypeFoldable<TyCtxt<'tcx>>,
impl<'tcx, T> IsSuggestable<'tcx> for Twhere T: TypeVisitable<TyCtxt<'tcx>> + TypeFoldable<TyCtxt<'tcx>>,
source§impl<T> MaybeResult<T> for T
impl<T> MaybeResult<T> for T
source§impl<'tcx, T> ToPredicate<'tcx, T> for T
impl<'tcx, T> ToPredicate<'tcx, T> for T
fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T
source§impl<'tcx, T> TypeVisitableExt<'tcx> for Twhere
T: TypeVisitable<TyCtxt<'tcx>>,
impl<'tcx, T> TypeVisitableExt<'tcx> for Twhere T: TypeVisitable<TyCtxt<'tcx>>,
source§fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool
fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool
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.source§fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool
fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool
true
if this type has any regions that escape binder
(and
hence are not bound by it).source§fn has_escaping_bound_vars(&self) -> bool
fn has_escaping_bound_vars(&self) -> bool
true
if this type has regions that are not a part of the type.
For example, for<'a> fn(&'a i32)
return false
, while fn(&'a i32)
would return true
. The latter can occur when traversing through the
former. Read morefn has_type_flags(&self, flags: TypeFlags) -> bool
fn has_projections(&self) -> bool
fn has_inherent_projections(&self) -> bool
fn has_opaque_types(&self) -> bool
fn has_generators(&self) -> bool
fn references_error(&self) -> bool
fn error_reported(&self) -> Result<(), ErrorGuaranteed>
fn has_non_region_param(&self) -> bool
fn has_infer_regions(&self) -> bool
fn has_infer_types(&self) -> bool
fn has_non_region_infer(&self) -> bool
fn has_infer(&self) -> bool
fn has_placeholders(&self) -> bool
fn has_non_region_placeholders(&self) -> bool
fn has_param(&self) -> bool
source§fn has_free_regions(&self) -> bool
fn has_free_regions(&self) -> bool
fn has_erased_regions(&self) -> bool
source§fn has_erasable_regions(&self) -> bool
fn has_erasable_regions(&self) -> bool
source§fn is_global(&self) -> bool
fn is_global(&self) -> bool
source§fn has_late_bound_regions(&self) -> bool
fn has_late_bound_regions(&self) -> bool
source§fn has_non_region_late_bound(&self) -> bool
fn has_non_region_late_bound(&self) -> bool
source§fn has_late_bound_vars(&self) -> bool
fn has_late_bound_vars(&self) -> bool
source§fn still_further_specializable(&self) -> bool
fn still_further_specializable(&self) -> bool
impl
specialization.source§impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
impl<Tcx, T> Value<Tcx> for Twhere Tcx: DepContext,
default fn from_cycle_error( tcx: Tcx, cycle: &[QueryInfo], _guar: ErrorGuaranteed ) -> 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: 4 bytes