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Merged
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May 7, 2021
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Update coverage docs and command line help #84815

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f58a362
Update coverage docs and command line help
richkadel May 3, 2021
8075b28
Renamed compiler-flags file to name of compiler-flag: instrument-cove…
richkadel May 6, 2021
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2 changes: 1 addition & 1 deletion compiler/rustc_codegen_llvm/src/coverageinfo/mapgen.rs
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Expand Up @@ -249,7 +249,7 @@ fn save_function_record(
///
/// We can find the unused functions (including generic functions) by the set difference of all MIR
/// `DefId`s (`tcx` query `mir_keys`) minus the codegenned `DefId`s (`tcx` query
/// `collect_and_partition_mono_items`).
/// `codegened_and_inlined_items`).
///
/// *HOWEVER* the codegenned `DefId`s are partitioned across multiple `CodegenUnit`s (CGUs), and
/// this function is processing a `function_coverage_map` for the functions (`Instance`/`DefId`)
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12 changes: 6 additions & 6 deletions compiler/rustc_session/src/options.rs
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Expand Up @@ -1056,12 +1056,12 @@ options! {DebuggingOptions, DebuggingSetter, basic_debugging_options,
"gather statistics about the input (default: no)"),
instrument_coverage: Option<InstrumentCoverage> = (None, parse_instrument_coverage, [TRACKED],
"instrument the generated code to support LLVM source-based code coverage \
reports (note, the compiler build config must include `profiler = true`, \
and is mutually exclusive with `-C profile-generate`/`-C profile-use`); \
implies `-Z symbol-mangling-version=v0`; disables/overrides some Rust \
optimizations. Optional values are: `=all` (default coverage), \
`=except-unused-generics`, `=except-unused-functions`, or `=off` \
(default: instrument-coverage=off)"),
reports (note, the compiler build config must include `profiler = true`); \
implies `-Z symbol-mangling-version=v0`. Optional values are:
`=all` (implicit value)
`=except-unused-generics`
`=except-unused-functions`
`=off` (default)"),
instrument_mcount: bool = (false, parse_bool, [TRACKED],
"insert function instrument code for mcount-based tracing (default: no)"),
keep_hygiene_data: bool = (false, parse_bool, [UNTRACKED],
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