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This change reduces the risk of impacting coverage tests on unrelated
changes (such as MIR and Span changes), and reduces the burden when
blessing coverage changes in case it is necessary.
* Remove all spanview tests. The spanview tests were useful during
development, but they can be generated as needed, via compiler command
line flags. They aren't critical to confirming coverage results. (The
coverage report tests are sufficient.)
When spanview regeneration was necessary, the diffs were way too hard
to read to be useful anyway. So I'm removing them to reduce friction
from a feature that is no longer useful.
* Remove the requirement for `llvm-cov show --debug` when blessing
tests. The `--debug` flag is, unfortunately, only available if LLVM is
built with `optimize = false` (in Rust's config.toml). This adds
significant time and resource burdens to the contributor's build. As
it turns out, for other reasons in the past, I wasn't actually using
the debug output (counter info) to validate coverage anymore either,
so it was required for no reason, I now realize.
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This reverts commit 4fef39113a514bb270f5661a82fdba17d3e41dbb.
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Added one more test (two files) showing coverage of generics and unused
functions across crates.
Created and referenced new Issues, as requested.
Added comments.
Added a note about the possible effects of compiler options on LLVM
coverage maps.
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Fixes multiple issue with counters, with simplification
Includes a change to the implicit else span in ast_lowering, so coverage
of the implicit else no longer spans the `then` block.
Adds coverage for unused closures and async function bodies.
Fixes: #78542
Adding unreachable regions for known MIR missing from coverage map
Cleaned up PR commits, and removed link-dead-code requirement and tests
Coverage no longer depends on Issue #76038 (`-C link-dead-code` is
no longer needed or enforced, so MSVC can use the same tests as
Linux and MacOS now)
Restrict adding unreachable regions to covered files
Improved the code that adds coverage for uncalled functions (with MIR
but not-codegenned) to avoid generating coverage in files not already
included in the files with covered functions.
Resolved last known issue requiring --emit llvm-ir workaround
Fixed bugs in how unreachable code spans were added.
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In preparation for removing the -deadcode variants
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