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Change ChunkedBitSet<MovePathIndex>s to MixedBitSet.

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It's a performance win because `MixedBitSet` is faster and uses less
memory than `ChunkedBitSet`.

Also reflow some overlong comment lines in
`lint_tail_expr_drop_order.rs`.
This commit is contained in:
Nicholas Nethercote 2024-12-05 14:20:05 +11:00
parent 6ee1a7aaa0
commit a06547508a
4 changed files with 42 additions and 39 deletions
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4
compiler/rustc_mir_transform/src/remove_uninit_drops.rs
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@ -1,5 +1,5 @@
use rustc_abi::FieldIdx;
use rustc_index::bit_set::ChunkedBitSet;
use rustc_index::bit_set::MixedBitSet;
use rustc_middle::mir::{Body, TerminatorKind};
use rustc_middle::ty::{self, GenericArgsRef, Ty, TyCtxt, VariantDef};
use rustc_mir_dataflow::impls::MaybeInitializedPlaces;
@ -67,7 +67,7 @@ impl<'tcx> crate::MirPass<'tcx> for RemoveUninitDrops {
fn is_needs_drop_and_init<'tcx>(
tcx: TyCtxt<'tcx>,
typing_env: ty::TypingEnv<'tcx>,
maybe_inits: &ChunkedBitSet<MovePathIndex>,
maybe_inits: &MixedBitSet<MovePathIndex>,
move_data: &MoveData<'tcx>,
ty: Ty<'tcx>,
mpi: MovePathIndex,