bjoernager/rust
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Auto merge of #93984 - nnethercote:ChunkedBitSet, r=Mark-Simulacrum

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Introduce `ChunkedBitSet` and use it for some dataflow analyses.

This reduces peak memory usage significantly for some programs with very
large functions.

r? `@ghost`
This commit is contained in:
bors 2022-02-23 01:26:07 +00:00
commit bafe8d06e0
14 changed files with 806 additions and 75 deletions
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4
compiler/rustc_borrowck/src/lib.rs
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@ -22,7 +22,7 @@ use rustc_errors::{Applicability, Diagnostic, DiagnosticBuilder, ErrorReported};
use rustc_hir as hir;
use rustc_hir::def_id::LocalDefId;
use rustc_hir::Node;
use rustc_index::bit_set::BitSet;
use rustc_index::bit_set::ChunkedBitSet;
use rustc_index::vec::IndexVec;
use rustc_infer::infer::{InferCtxt, TyCtxtInferExt};
use rustc_middle::mir::{
@ -1667,7 +1667,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
location: Location,
desired_action: InitializationRequiringAction,
place_span: (PlaceRef<'tcx>, Span),
maybe_uninits: &BitSet<MovePathIndex>,
maybe_uninits: &ChunkedBitSet<MovePathIndex>,
from: u64,
to: u64,
) {