bjoernager/rust
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coverage: Add debugging flag -Zcoverage-options=no-mir-spans

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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, because the coverage output is less noisy.

For internal debugging only. If other code changes would make it hard to keep
supporting this flag, remove it.
This commit is contained in:
Zalathar 2024-06-17 20:09:45 +10:00
parent e23ae72ac7
commit abc2c702af
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);