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Add -Z maximal-hir-to-mir-coverage flag This PR adds a new unstable flag `-Z maximal-hir-to-mir-coverage` that changes the behavior of `maybe_lint_level_root_bounded`, pursuant to [a discussion on Zulip](https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/Mapping.20MIR.20to.20HIR). When enabled, this function will not search upwards for a lint root, but rather immediately return the provided HIR node ID. This change increases the granularity of the mapping between MIR locations and HIR nodes inside the `SourceScopeLocalData` data structures. This increase in granularity is useful for rustc consumers like [Flowistry](https://github.com/willcrichton/flowistry) that rely on getting source-mapping information about the MIR CFG that is as precise as possible. A test `maximal_mir_to_hir_coverage.rs` has been added to verify that this flag does not break anything. r? `@cjgillot` cc `@gavinleroy` |
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| .. | ||
| config | ||
| cgu_reuse_tracker.rs | ||
| code_stats.rs | ||
| config.rs | ||
| cstore.rs | ||
| errors.rs | ||
| filesearch.rs | ||
| lib.rs | ||
| options.rs | ||
| output.rs | ||
| parse.rs | ||
| search_paths.rs | ||
| session.rs | ||
| utils.rs | ||