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2025-05-06coverage: Only merge adjacent coverage spansZalathar-6/+13
This also removes some manipulation of the function signature span that only made sense in the context of merging non-adjacent spans.
2025-05-06coverage-dump: Dump filenames instead of global file IDs (and bless)Zalathar-1/+1
2025-04-01coverage: Shrink call spans to just the function nameZalathar-2/+2
This is a way to shrink call spans that doesn't involve mixing different spans, and avoids overlap with argument spans. This patch also removes some low-value comments that were causing rustfmt to ignore the match arms.
2025-01-16coverage: Completely overhaul counter assignment, using node-flow graphsZalathar-4/+6
2024-10-11coverage: Include the highest counter ID seen in `.cov-map` dumpsZalathar-0/+1
When making changes that have a large impact on coverage counter creation, this makes it easier to see whether the number of physical counters has changed. (The highest counter ID seen in coverage maps is not necessarily the same as the number of physical counters actually used by the instrumented code, but it's the best approximation we can get from looking only at the coverage maps, and it should be reasonably accurate in most cases.)
2024-06-12coverage: Add `tests/coverage/assert-ne.rs`Zalathar-0/+13
This test extracts a fragment of `issue-84561.rs` that has historically proven troublesome when trying to modify how spans are extracted from MIR.