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Rollup merge of #147751 - nnethercote:bit_set-Word, r=Zalathar

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Use `bit_set::Word` in a couple more places.

It's a synonym for `u64` and there are a couple of places where we use `u64` where we should use `Word`, which this commit fixes.

I found this when I tried changing `Word` to `u128` (which made performance worse).

r? `````@Zalathar`````
This commit is contained in:
Matthias Krüger
2025-10-16 19:35:27 +02:00
committed by GitHub
parent 6f66f3baf5 8787c0b863
commit 7604d12e05
1 changed files with 2 additions and 2 deletions
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4
compiler/rustc_index/src/bit_set.rs
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@@ -872,7 +872,7 @@ impl<T: Idx> BitRelations<ChunkedBitSet<T>> for ChunkedBitSet<T> {
let mut self_chunk_words = **other_chunk_words;
for word in self_chunk_words[0..num_words].iter_mut().rev() {
*word = !*word & tail_mask;
tail_mask = u64::MAX;
tail_mask = Word::MAX;
}
let self_chunk_count = chunk_domain_size - *other_chunk_count;
debug_assert_eq!(
@@ -887,7 +887,7 @@ impl<T: Idx> BitRelations<ChunkedBitSet<T>> for ChunkedBitSet<T> {
) => {
// See `ChunkedBitSet::union` for details on what is happening here.
let num_words = num_words(chunk_domain_size as usize);
let op = |a: u64, b: u64| a & !b;
let op = |a: Word, b: Word| a & !b;
if !bitwise_changes(
&self_chunk_words[0..num_words],
&other_chunk_words[0..num_words],