Struct rustc_middle::mir::BasicBlocks

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pub struct BasicBlocks<'tcx> {
    basic_blocks: IndexVec<BasicBlock, BasicBlockData<'tcx>>,
    cache: Cache,
}

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§basic_blocks: IndexVec<BasicBlock, BasicBlockData<'tcx>>§cache: Cache

Implementations§

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impl<'tcx> BasicBlocks<'tcx>

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pub fn new(basic_blocks: IndexVec<BasicBlock, BasicBlockData<'tcx>>) -> Self

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pub fn is_cfg_cyclic(&self) -> bool

Returns true if control-flow graph contains a cycle reachable from the START_BLOCK.

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pub fn dominators(&self) -> &Dominators<BasicBlock>

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pub fn predecessors(&self) -> &IndexVec<BasicBlock, SmallVec<[BasicBlock; 4]>>

Returns predecessors for each basic block.

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pub fn reverse_postorder(&self) -> &[BasicBlock]

Returns basic blocks in a reverse postorder.

See traversal::reverse_postorder’s docs to learn what is preorder traversal.

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pub fn switch_sources( &self ) -> &FxHashMap<(BasicBlock, BasicBlock), SmallVec<[Option<u128>; 1]>>

switch_sources()[&(target, switch)] returns a list of switch values that lead to a target block from a switch block.

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pub fn as_mut(&mut self) -> &mut IndexVec<BasicBlock, BasicBlockData<'tcx>>

Returns mutable reference to basic blocks. Invalidates CFG cache.

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pub fn as_mut_preserves_cfg( &mut self ) -> &mut IndexVec<BasicBlock, BasicBlockData<'tcx>>

Get mutable access to basic blocks without invalidating the CFG cache.

By calling this method instead of e.g. BasicBlocks::as_mut you promise not to change the CFG. This means that

  1. The number of basic blocks remains unchanged
  2. The set of successors of each terminator remains unchanged.
  3. For each TerminatorKind::SwitchInt, the targets remains the same and the terminator kind is not changed.

If any of these conditions cannot be upheld, you should call BasicBlocks::invalidate_cfg_cache.

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pub fn invalidate_cfg_cache(&mut self)

Invalidates cached information about the CFG.

You will only ever need this if you have also called BasicBlocks::as_mut_preserves_cfg. All other methods that allow you to mutate the basic blocks also call this method themselves, thereby avoiding any risk of accidentally cache invalidation.

Methods from Deref<Target = IndexSlice<BasicBlock, BasicBlockData<'tcx>>>§

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pub fn len(&self) -> usize

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pub fn is_empty(&self) -> bool

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pub fn next_index(&self) -> I

Gives the next index that will be assigned when push is called.

Manual bounds checks can be done using idx < slice.next_index() (as opposed to idx.index() < slice.len()).

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pub fn iter(&self) -> Iter<'_, T>

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pub fn iter_enumerated(&self) -> impl DoubleEndedIterator + ExactSizeIterator

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pub fn indices( &self ) -> impl DoubleEndedIterator + ExactSizeIterator + Clone + 'static

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pub fn last_index(&self) -> Option<I>

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pub fn get(&self, index: I) -> Option<&T>

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pub fn invert_bijective_mapping(&self) -> IndexVec<J, I>

Invert a bijective mapping, i.e. invert(map)[y] = x if map[x] = y, assuming the values in self are a permutation of 0..self.len().

This is used to go between memory_index (source field order to memory order) and inverse_memory_index (memory order to source field order). See also FieldsShape::Arbitrary::memory_index for more details.

Trait Implementations§

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impl<'tcx> Clone for BasicBlocks<'tcx>

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fn clone(&self) -> BasicBlocks<'tcx>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<'tcx> Debug for BasicBlocks<'tcx>

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

Formats the value using the given formatter. Read more
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impl<'tcx, __D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<__D> for BasicBlocks<'tcx>

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fn decode(__decoder: &mut __D) -> Self

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impl<'tcx> Deref for BasicBlocks<'tcx>

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type Target = IndexSlice<BasicBlock, BasicBlockData<'tcx>>

The resulting type after dereferencing.
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fn deref(&self) -> &IndexSlice<BasicBlock, BasicBlockData<'tcx>>

Dereferences the value.
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impl<'tcx> DirectedGraph for BasicBlocks<'tcx>

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impl<'tcx, __E: TyEncoder<I = TyCtxt<'tcx>>> Encodable<__E> for BasicBlocks<'tcx>

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fn encode(&self, __encoder: &mut __E)

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impl<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for BasicBlocks<'tcx>

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

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impl<'tcx> Predecessors for BasicBlocks<'tcx>

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fn predecessors(&self, node: Self::Node) -> impl Iterator<Item = Self::Node>

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impl<'tcx> StartNode for BasicBlocks<'tcx>

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fn start_node(&self) -> Self::Node

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impl<'tcx> Successors for BasicBlocks<'tcx>

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fn successors(&self, node: Self::Node) -> impl Iterator<Item = Self::Node>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for BasicBlocks<'tcx>

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fn try_fold_with<__F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, __folder: &mut __F ) -> Result<Self, __F::Error>

The entry point for folding. To fold a value t with a folder f call: t.try_fold_with(f). Read more
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fn fold_with<F>(self, folder: &mut F) -> Self
where F: TypeFolder<I>,

A convenient alternative to try_fold_with for use with infallible folders. Do not override this method, to ensure coherence with try_fold_with.
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impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for BasicBlocks<'tcx>

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fn visit_with<__V: TypeVisitor<TyCtxt<'tcx>>>( &self, __visitor: &mut __V ) -> __V::Result

The entry point for visiting. To visit a value t with a visitor v call: t.visit_with(v). Read more

Auto Trait Implementations§

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impl<'tcx> DynSend for BasicBlocks<'tcx>

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impl<'tcx> DynSync for BasicBlocks<'tcx>

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impl<'tcx> !Freeze for BasicBlocks<'tcx>

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impl<'tcx> !RefUnwindSafe for BasicBlocks<'tcx>

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impl<'tcx> Send for BasicBlocks<'tcx>

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impl<'tcx> Sync for BasicBlocks<'tcx>

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impl<'tcx> Unpin for BasicBlocks<'tcx>

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impl<'tcx> !UnwindSafe for BasicBlocks<'tcx>

Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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impl<T> Any for T
where T: 'static + ?Sized,

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Gets the TypeId of self. Read more
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Immutably borrows from an owned value. Read more
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Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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impl<Tcx, T> DepNodeParams<Tcx> for T
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default fn fingerprint_style() -> FingerprintStyle

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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.
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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: 216 bytes