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coverage: Simplify push_refined_span

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It turns out that all of the `len` manipulation here was just reimplementing
`last_mut`.
This commit is contained in:
Zalathar 2023-10-14 21:52:36 +11:00
parent fa2e26285c
commit 5f1e8f9950
1 changed files with 8 additions and 12 deletions
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20
compiler/rustc_mir_transform/src/coverage/spans.rs
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@ -384,19 +384,15 @@ fn to_refined_spans(mut self) -> Vec<CoverageSpan> {
}
fn push_refined_span(&mut self, covspan: CoverageSpan) {
let len = self.refined_spans.len();
if len > 0 {
let last = &mut self.refined_spans[len - 1];
if last.is_mergeable(&covspan) {
debug!(
"merging new refined span with last refined span, last={:?}, covspan={:?}",
last, covspan
);
last.merge_from(covspan);
return;
}
if let Some(last) = self.refined_spans.last_mut()
&& last.is_mergeable(&covspan)
{
// Instead of pushing the new span, merge it with the last refined span.
debug!(?last, ?covspan, "merging new refined span with last refined span");
last.merge_from(covspan);
} else {
self.refined_spans.push(covspan);
}
self.refined_spans.push(covspan)
}
/// If `curr` is part of a new macro expansion, carve out and push a separate