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coverage: Add LLVM plumbing for expansion regions

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This is currently unused, but paves the way for future work on expansion
regions without having to worry about the FFI parts.
This commit is contained in:
Zalathar
2025-03-04 21:55:43 +11:00
parent 2947be7af8
commit d07ef5b0e1
5 changed files with 57 additions and 7 deletions
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11
compiler/rustc_codegen_llvm/src/coverageinfo/mapgen/covfun.rs
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@@ -120,13 +120,18 @@ fn fill_region_tables<'tcx>(
// Associate that global file ID with a local file ID for this function.
let local_file_id = covfun.virtual_file_mapping.local_id_for_global(global_file_id);
let ffi::Regions { code_regions, branch_regions, mcdc_branch_regions, mcdc_decision_regions } =
&mut covfun.regions;
let make_cov_span =
|span: Span| spans::make_coverage_span(local_file_id, source_map, &source_file, span);
let discard_all = tcx.sess.coverage_discard_all_spans_in_codegen();
let ffi::Regions {
code_regions,
expansion_regions: _, // FIXME(Zalathar): Fill out support for expansion regions
branch_regions,
mcdc_branch_regions,
mcdc_decision_regions,
} = &mut covfun.regions;
// For each counter/region pair in this function+file, convert it to a
// form suitable for FFI.
for &Mapping { ref kind, span } in &fn_cov_info.mappings {