Struct BasicBlockData

pub struct BasicBlockData<'tcx> {
    pub statements: Vec<Statement<'tcx>>,
    pub terminator: Option<Terminator<'tcx>>,
    pub is_cleanup: bool,
}

Data for a basic block, including a list of its statements.

See BasicBlock for documentation on what basic blocks are at a high level.

Fields

statements: Vec<Statement<'tcx>>

List of statements in this block.

terminator: Option<Terminator<'tcx>>

Terminator for this block.

N.B., this should generally ONLY be None during construction. Therefore, you should generally access it via the terminator() or terminator_mut() methods. The only exception is that certain passes, such as simplify_cfg, swap out the terminator temporarily with None while they continue to recurse over the set of basic blocks.

is_cleanup: bool

If true, this block lies on an unwind path. This is used during codegen where distinct kinds of basic blocks may be generated (particularly for MSVC cleanup). Unwind blocks must only branch to other unwind blocks.

Implementations

impl<'tcx> BasicBlockData<'tcx>

pub fn new(terminator: Option<Terminator<'tcx>>) -> BasicBlockData<'tcx>

pub fn terminator(&self) -> &Terminator<'tcx>

Accessor for terminator.

Terminator may not be None after construction of the basic block is complete. This accessor provides a convenient way to reach the terminator.

pub fn terminator_mut(&mut self) -> &mut Terminator<'tcx>

pub fn retain_statements<F>(&mut self, f: F)

where F: FnMut(&mut Statement<'_>) -> bool,

pub fn expand_statements<F, I>(&mut self, f: F)

where F: FnMut(&mut Statement<'tcx>) -> Option<I>, I: TrustedLen<Item = Statement<'tcx>>,

pub fn visitable(&self, index: usize) -> &dyn MirVisitable<'tcx>

pub fn is_empty_unreachable(&self) -> bool

Does the block have no statements and an unreachable terminator?

pub fn mono_successors( &self, tcx: TyCtxt<'tcx>, instance: Instance<'tcx>, ) -> Successors<'_>

Like Terminator::successors but tries to use information available from the Instance to skip successors like the false side of an if const {.

This is used to implement traversal::mono_reachable and traversal::mono_reachable_reverse_postorder.

Trait Implementations

impl<'tcx> Clone for BasicBlockData<'tcx>

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

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'tcx> Debug for BasicBlockData<'tcx>

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

Formats the value using the given formatter.

impl<'tcx, __D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<__D> for BasicBlockData<'tcx>

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

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

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

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

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

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

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).

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.

impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for BasicBlockData<'tcx>

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).

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