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BitSet perf improvements

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This commit makes two changes:
 1. Changes `MaybeLiveLocals` to use `ChunkedBitSet`
 2. Overrides the `fold` method for the iterator for `ChunkedBitSet`
This commit is contained in:
Jakob Degen 2022-06-05 16:22:54 -07:00
parent 02916c4c75
commit bc7cd2f351
5 changed files with 141 additions and 23 deletions
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4
compiler/rustc_mir_dataflow/src/impls/liveness.rs
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@ -30,14 +30,14 @@ impl MaybeLiveLocals {
}
impl<'tcx> AnalysisDomain<'tcx> for MaybeLiveLocals {
type Domain = BitSet<Local>;
type Domain = ChunkedBitSet<Local>;
type Direction = Backward;
const NAME: &'static str = "liveness";
fn bottom_value(&self, body: &mir::Body<'tcx>) -> Self::Domain {
// bottom = not live
BitSet::new_empty(body.local_decls.len())
ChunkedBitSet::new_empty(body.local_decls.len())
}
fn initialize_start_block(&self, _: &mir::Body<'tcx>, _: &mut Self::Domain) {