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Rollup merge of #126587 - Zalathar:no-mir-spans, r=oli-obk

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coverage: Add debugging flag `-Zcoverage-options=no-mir-spans`

When set, this flag skips the code that normally extracts coverage spans from MIR statements and terminators. That sometimes makes it easier to debug branch coverage and MC/DC coverage instrumentation, because the coverage output is less noisy.

For internal debugging only. If future code changes would make it hard to keep supporting this flag, it should be removed at that time.

`@rustbot` label +A-code-coverage
This commit is contained in:
Guillaume Gomez 2024-06-18 15:30:46 +02:00 • committed by GitHub
commit bbec736f2d
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10 changed files with 235 additions and 21 deletions
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2
compiler/rustc_interface/src/tests.rs
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@ -761,7 +761,7 @@ fn test_unstable_options_tracking_hash() {
})
);
tracked!(codegen_backend, Some("abc".to_string()));
tracked!(coverage_options, CoverageOptions { level: CoverageLevel::Mcdc });
tracked!(coverage_options, CoverageOptions { level: CoverageLevel::Mcdc, no_mir_spans: true });
tracked!(crate_attr, vec!["abc".to_string()]);
tracked!(cross_crate_inline_threshold, InliningThreshold::Always);
tracked!(debug_info_for_profiling, true);