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UseSites

cairo_lang_lowering::analysis::use_sites

Struct UseSites 

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pub struct UseSites { /* private fields */ }
Expand description

Tracks use sites for each variable, indexed by variable arena index.

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impl UseSites

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pub fn analyze(lowered: &Lowered<'_>) -> Self

Builds use-site information by scanning all statements and block ends.

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pub fn use_count(&self, var: VariableId) -> usize

Returns the total number of consuming slots remaining for var (the summed multiplicity across all of its use-site locations).

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pub fn move_uses(&mut self, from: VariableId, to: VariableId, loc: UseLocation)

Moves all uses of from at loc to to, mirroring a rename that rewrites every consuming slot at that location in one go: the whole per-location count is transferred and added to any uses to already has there. No-op if from has no use at loc.

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pub fn use_locs( &self, var: VariableId, ) -> impl ExactSizeIterator<Item = (UseLocation, usize)> + '_

Returns each use-site location for var together with its multiplicity (the number of consuming slots at that location).

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impl Debug for UseSites

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

Formats the value using the given formatter. Read more

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