3 use crate::early_error;
5 use crate::search_paths::SearchPath;
6 use crate::utils::NativeLib;
7 use rustc_errors::LanguageIdentifier;
8 use rustc_target::spec::{CodeModel, LinkerFlavor, MergeFunctions, PanicStrategy, SanitizerSet};
9 use rustc_target::spec::{
10 RelocModel, RelroLevel, SplitDebuginfo, StackProtector, TargetTriple, TlsModel,
13 use rustc_feature::UnstableFeatures;
14 use rustc_span::edition::Edition;
15 use rustc_span::RealFileName;
16 use rustc_span::SourceFileHashAlgorithm;
18 use std::collections::BTreeMap;
20 use std::collections::hash_map::DefaultHasher;
21 use std::hash::Hasher;
22 use std::num::NonZeroUsize;
23 use std::path::PathBuf;
27 ($opt_name:ident, $opt_expr:expr, $sub_hashes:expr) => {
29 .insert(stringify!($opt_name), $opt_expr as &dyn dep_tracking::DepTrackingHash)
32 panic!("duplicate key in CLI DepTrackingHash: {}", stringify!($opt_name))
37 macro_rules! hash_opt {
38 ($opt_name:ident, $opt_expr:expr, $sub_hashes:expr, $_for_crate_hash: ident, [UNTRACKED]) => {{}};
39 ($opt_name:ident, $opt_expr:expr, $sub_hashes:expr, $_for_crate_hash: ident, [TRACKED]) => {{ insert!($opt_name, $opt_expr, $sub_hashes) }};
40 ($opt_name:ident, $opt_expr:expr, $sub_hashes:expr, $for_crate_hash: ident, [TRACKED_NO_CRATE_HASH]) => {{
42 insert!($opt_name, $opt_expr, $sub_hashes)
45 ($opt_name:ident, $opt_expr:expr, $sub_hashes:expr, $_for_crate_hash: ident, [SUBSTRUCT]) => {{}};
48 macro_rules! hash_substruct {
49 ($opt_name:ident, $opt_expr:expr, $error_format:expr, $for_crate_hash:expr, $hasher:expr, [UNTRACKED]) => {{}};
50 ($opt_name:ident, $opt_expr:expr, $error_format:expr, $for_crate_hash:expr, $hasher:expr, [TRACKED]) => {{}};
51 ($opt_name:ident, $opt_expr:expr, $error_format:expr, $for_crate_hash:expr, $hasher:expr, [TRACKED_NO_CRATE_HASH]) => {{}};
52 ($opt_name:ident, $opt_expr:expr, $error_format:expr, $for_crate_hash:expr, $hasher:expr, [SUBSTRUCT]) => {
53 use crate::config::dep_tracking::DepTrackingHash;
54 $opt_expr.dep_tracking_hash($for_crate_hash, $error_format).hash(
62 macro_rules! top_level_options {
63 ( $( #[$top_level_attr:meta] )* pub struct Options { $(
65 $opt:ident : $t:ty [$dep_tracking_marker:ident],
68 $( #[$top_level_attr] )*
77 pub fn dep_tracking_hash(&self, for_crate_hash: bool) -> u64 {
78 let mut sub_hashes = BTreeMap::new();
84 [$dep_tracking_marker]);
86 let mut hasher = DefaultHasher::new();
87 dep_tracking::stable_hash(sub_hashes,
97 [$dep_tracking_marker]);
106 pub fn mir_opt_level(&self) -> usize {
109 .unwrap_or_else(|| if self.optimize != OptLevel::No { 2 } else { 1 })
112 pub fn instrument_coverage(&self) -> bool {
113 self.cg.instrument_coverage.unwrap_or(InstrumentCoverage::Off) != InstrumentCoverage::Off
116 pub fn instrument_coverage_except_unused_generics(&self) -> bool {
117 self.cg.instrument_coverage.unwrap_or(InstrumentCoverage::Off)
118 == InstrumentCoverage::ExceptUnusedGenerics
121 pub fn instrument_coverage_except_unused_functions(&self) -> bool {
122 self.cg.instrument_coverage.unwrap_or(InstrumentCoverage::Off)
123 == InstrumentCoverage::ExceptUnusedFunctions
128 /// The top-level command-line options struct.
130 /// For each option, one has to specify how it behaves with regard to the
131 /// dependency tracking system of incremental compilation. This is done via the
132 /// square-bracketed directive after the field type. The options are:
135 /// A change in the given field will cause the compiler to completely clear the
136 /// incremental compilation cache before proceeding.
138 /// - `[TRACKED_NO_CRATE_HASH]`
139 /// Same as `[TRACKED]`, but will not affect the crate hash. This is useful for options that only
140 /// affect the incremental cache.
143 /// Incremental compilation is not influenced by this option.
146 /// Second-level sub-structs containing more options.
148 /// If you add a new option to this struct or one of the sub-structs like
149 /// `CodegenOptions`, think about how it influences incremental compilation. If in
150 /// doubt, specify `[TRACKED]`, which is always "correct" but might lead to
151 /// unnecessary re-compilation.
153 /// The crate config requested for the session, which may be combined
154 /// with additional crate configurations during the compile process.
155 crate_types: Vec<CrateType> [TRACKED],
156 optimize: OptLevel [TRACKED],
157 /// Include the `debug_assertions` flag in dependency tracking, since it
158 /// can influence whether overflow checks are done or not.
159 debug_assertions: bool [TRACKED],
160 debuginfo: DebugInfo [TRACKED],
161 lint_opts: Vec<(String, lint::Level)> [TRACKED_NO_CRATE_HASH],
162 lint_cap: Option<lint::Level> [TRACKED_NO_CRATE_HASH],
163 describe_lints: bool [UNTRACKED],
164 output_types: OutputTypes [TRACKED],
165 search_paths: Vec<SearchPath> [UNTRACKED],
166 libs: Vec<NativeLib> [TRACKED],
167 maybe_sysroot: Option<PathBuf> [UNTRACKED],
169 target_triple: TargetTriple [TRACKED],
171 test: bool [TRACKED],
172 error_format: ErrorOutputType [UNTRACKED],
174 /// If `Some`, enable incremental compilation, using the given
175 /// directory to store intermediate results.
176 incremental: Option<PathBuf> [UNTRACKED],
177 assert_incr_state: Option<IncrementalStateAssertion> [UNTRACKED],
179 debugging_opts: DebuggingOptions [SUBSTRUCT],
180 prints: Vec<PrintRequest> [UNTRACKED],
181 /// Determines which borrow checker(s) to run. This is the parsed, sanitized
182 /// version of `debugging_opts.borrowck`, which is just a plain string.
183 borrowck_mode: BorrowckMode [UNTRACKED],
184 cg: CodegenOptions [SUBSTRUCT],
185 externs: Externs [UNTRACKED],
186 crate_name: Option<String> [TRACKED],
187 /// Indicates how the compiler should treat unstable features.
188 unstable_features: UnstableFeatures [TRACKED],
190 /// Indicates whether this run of the compiler is actually rustdoc. This
191 /// is currently just a hack and will be removed eventually, so please
192 /// try to not rely on this too much.
193 actually_rustdoc: bool [TRACKED],
195 /// Control path trimming.
196 trimmed_def_paths: TrimmedDefPaths [TRACKED],
198 /// Specifications of codegen units / ThinLTO which are forced as a
199 /// result of parsing command line options. These are not necessarily
200 /// what rustc was invoked with, but massaged a bit to agree with
201 /// commands like `--emit llvm-ir` which they're often incompatible with
202 /// if we otherwise use the defaults of rustc.
203 cli_forced_codegen_units: Option<usize> [UNTRACKED],
204 cli_forced_thinlto_off: bool [UNTRACKED],
206 /// Remap source path prefixes in all output (messages, object files, debug, etc.).
207 remap_path_prefix: Vec<(PathBuf, PathBuf)> [TRACKED_NO_CRATE_HASH],
208 /// Base directory containing the `src/` for the Rust standard library, and
209 /// potentially `rustc` as well, if we can can find it. Right now it's always
210 /// `$sysroot/lib/rustlib/src/rust` (i.e. the `rustup` `rust-src` component).
212 /// This directory is what the virtual `/rustc/$hash` is translated back to,
213 /// if Rust was built with path remapping to `/rustc/$hash` enabled
214 /// (the `rust.remap-debuginfo` option in `config.toml`).
215 real_rust_source_base_dir: Option<PathBuf> [TRACKED_NO_CRATE_HASH],
217 edition: Edition [TRACKED],
219 /// `true` if we're emitting JSON blobs about each artifact produced
221 json_artifact_notifications: bool [TRACKED],
223 /// `true` if we're emitting a JSON blob containing the unused externs
224 json_unused_externs: JsonUnusedExterns [UNTRACKED],
226 /// `true` if we're emitting a JSON job containing a future-incompat report for lints
227 json_future_incompat: bool [TRACKED],
229 pretty: Option<PpMode> [UNTRACKED],
231 /// The (potentially remapped) working directory
232 working_dir: RealFileName [TRACKED],
236 /// Defines all `CodegenOptions`/`DebuggingOptions` fields and parsers all at once. The goal of this
237 /// macro is to define an interface that can be programmatically used by the option parser
238 /// to initialize the struct without hardcoding field names all over the place.
240 /// The goal is to invoke this macro once with the correct fields, and then this macro generates all
241 /// necessary code. The main gotcha of this macro is the `cgsetters` module which is a bunch of
242 /// generated code to parse an option into its respective field in the struct. There are a few
243 /// hand-written parsers for parsing specific types of values in this module.
244 macro_rules! options {
245 ($struct_name:ident, $stat:ident, $optmod:ident, $prefix:expr, $outputname:expr,
246 $($( #[$attr:meta] )* $opt:ident : $t:ty = (
249 [$dep_tracking_marker:ident],
254 pub struct $struct_name { $(pub $opt: $t),* }
256 impl Default for $struct_name {
257 fn default() -> $struct_name {
258 $struct_name { $( $( #[$attr] )* $opt: $init),* }
264 matches: &getopts::Matches,
265 error_format: ErrorOutputType,
267 build_options(matches, $stat, $prefix, $outputname, error_format)
270 fn dep_tracking_hash(&self, for_crate_hash: bool, error_format: ErrorOutputType) -> u64 {
271 let mut sub_hashes = BTreeMap::new();
277 [$dep_tracking_marker]);
279 let mut hasher = DefaultHasher::new();
280 dep_tracking::stable_hash(sub_hashes,
289 pub const $stat: OptionDescrs<$struct_name> =
290 &[ $( (stringify!($opt), $optmod::$opt, desc::$parse, $desc) ),* ];
294 pub(super) fn $opt(cg: &mut super::$struct_name, v: Option<&str>) -> bool {
295 super::parse::$parse(&mut redirect_field!(cg.$opt), v)
302 // Sometimes different options need to build a common structure.
303 // That structure can be kept in one of the options' fields, the others become dummy.
304 macro_rules! redirect_field {
305 ($cg:ident.link_arg) => {
308 ($cg:ident.pre_link_arg) => {
311 ($cg:ident.$field:ident) => {
316 type OptionSetter<O> = fn(&mut O, v: Option<&str>) -> bool;
317 type OptionDescrs<O> = &'static [(&'static str, OptionSetter<O>, &'static str, &'static str)];
319 fn build_options<O: Default>(
320 matches: &getopts::Matches,
321 descrs: OptionDescrs<O>,
324 error_format: ErrorOutputType,
326 let mut op = O::default();
327 for option in matches.opt_strs(prefix) {
328 let (key, value) = match option.split_once('=') {
329 None => (option, None),
330 Some((k, v)) => (k.to_string(), Some(v)),
333 let option_to_lookup = key.replace('-', "_");
334 match descrs.iter().find(|(name, ..)| *name == option_to_lookup) {
335 Some((_, setter, type_desc, _)) => {
336 if !setter(&mut op, value) {
341 "{0} option `{1}` requires {2} ({3} {1}=<value>)",
342 outputname, key, type_desc, prefix
345 Some(value) => early_error(
348 "incorrect value `{value}` for {outputname} option `{key}` - {type_desc} was expected"
354 None => early_error(error_format, &format!("unknown {outputname} option: `{key}`")),
360 #[allow(non_upper_case_globals)]
362 pub const parse_no_flag: &str = "no value";
363 pub const parse_bool: &str = "one of: `y`, `yes`, `on`, `n`, `no`, or `off`";
364 pub const parse_opt_bool: &str = parse_bool;
365 pub const parse_string: &str = "a string";
366 pub const parse_opt_string: &str = parse_string;
367 pub const parse_string_push: &str = parse_string;
368 pub const parse_opt_langid: &str = "a language identifier";
369 pub const parse_opt_pathbuf: &str = "a path";
370 pub const parse_list: &str = "a space-separated list of strings";
371 pub const parse_list_with_polarity: &str =
372 "a comma-separated list of strings, with elements beginning with + or -";
373 pub const parse_opt_comma_list: &str = "a comma-separated list of strings";
374 pub const parse_number: &str = "a number";
375 pub const parse_opt_number: &str = parse_number;
376 pub const parse_threads: &str = parse_number;
377 pub const parse_passes: &str = "a space-separated list of passes, or `all`";
378 pub const parse_panic_strategy: &str = "either `unwind` or `abort`";
379 pub const parse_opt_panic_strategy: &str = parse_panic_strategy;
380 pub const parse_oom_strategy: &str = "either `panic` or `abort`";
381 pub const parse_relro_level: &str = "one of: `full`, `partial`, or `off`";
382 pub const parse_sanitizers: &str = "comma separated list of sanitizers: `address`, `cfi`, `hwaddress`, `leak`, `memory`, `memtag`, or `thread`";
383 pub const parse_sanitizer_memory_track_origins: &str = "0, 1, or 2";
384 pub const parse_cfguard: &str =
385 "either a boolean (`yes`, `no`, `on`, `off`, etc), `checks`, or `nochecks`";
386 pub const parse_cfprotection: &str = "`none`|`no`|`n` (default), `branch`, `return`, or `full`|`yes`|`y` (equivalent to `branch` and `return`)";
387 pub const parse_strip: &str = "either `none`, `debuginfo`, or `symbols`";
388 pub const parse_linker_flavor: &str = ::rustc_target::spec::LinkerFlavor::one_of();
389 pub const parse_optimization_fuel: &str = "crate=integer";
390 pub const parse_mir_spanview: &str = "`statement` (default), `terminator`, or `block`";
391 pub const parse_instrument_coverage: &str =
392 "`all` (default), `except-unused-generics`, `except-unused-functions`, or `off`";
393 pub const parse_unpretty: &str = "`string` or `string=string`";
394 pub const parse_treat_err_as_bug: &str = "either no value or a number bigger than 0";
395 pub const parse_lto: &str =
396 "either a boolean (`yes`, `no`, `on`, `off`, etc), `thin`, `fat`, or omitted";
397 pub const parse_linker_plugin_lto: &str =
398 "either a boolean (`yes`, `no`, `on`, `off`, etc), or the path to the linker plugin";
399 pub const parse_location_detail: &str =
400 "comma separated list of location details to track: `file`, `line`, or `column`";
401 pub const parse_switch_with_opt_path: &str =
402 "an optional path to the profiling data output directory";
403 pub const parse_merge_functions: &str = "one of: `disabled`, `trampolines`, or `aliases`";
404 pub const parse_symbol_mangling_version: &str = "either `legacy` or `v0` (RFC 2603)";
405 pub const parse_src_file_hash: &str = "either `md5` or `sha1`";
406 pub const parse_relocation_model: &str =
407 "one of supported relocation models (`rustc --print relocation-models`)";
408 pub const parse_code_model: &str = "one of supported code models (`rustc --print code-models`)";
409 pub const parse_tls_model: &str = "one of supported TLS models (`rustc --print tls-models`)";
410 pub const parse_target_feature: &str = parse_string;
411 pub const parse_wasi_exec_model: &str = "either `command` or `reactor`";
412 pub const parse_split_debuginfo: &str =
413 "one of supported split-debuginfo modes (`off`, `packed`, or `unpacked`)";
414 pub const parse_split_dwarf_kind: &str =
415 "one of supported split dwarf modes (`split` or `single`)";
416 pub const parse_gcc_ld: &str = "one of: no value, `lld`";
417 pub const parse_stack_protector: &str =
418 "one of (`none` (default), `basic`, `strong`, or `all`)";
419 pub const parse_branch_protection: &str =
420 "a `,` separated combination of `bti`, `b-key`, `pac-ret`, or `leaf`";
424 pub(crate) use super::*;
425 use std::str::FromStr;
427 /// This is for boolean options that don't take a value and start with
428 /// `no-`. This style of option is deprecated.
429 pub(crate) fn parse_no_flag(slot: &mut bool, v: Option<&str>) -> bool {
439 /// Use this for any boolean option that has a static default.
440 pub(crate) fn parse_bool(slot: &mut bool, v: Option<&str>) -> bool {
442 Some("y") | Some("yes") | Some("on") | None => {
446 Some("n") | Some("no") | Some("off") => {
454 /// Use this for any boolean option that lacks a static default. (The
455 /// actions taken when such an option is not specified will depend on
456 /// other factors, such as other options, or target options.)
457 pub(crate) fn parse_opt_bool(slot: &mut Option<bool>, v: Option<&str>) -> bool {
459 Some("y") | Some("yes") | Some("on") | None => {
463 Some("n") | Some("no") | Some("off") => {
471 /// Use this for any string option that has a static default.
472 pub(crate) fn parse_string(slot: &mut String, v: Option<&str>) -> bool {
475 *slot = s.to_string();
482 /// Use this for any string option that lacks a static default.
483 pub(crate) fn parse_opt_string(slot: &mut Option<String>, v: Option<&str>) -> bool {
486 *slot = Some(s.to_string());
493 /// Parse an optional language identifier, e.g. `en-US` or `zh-CN`.
494 pub(crate) fn parse_opt_langid(slot: &mut Option<LanguageIdentifier>, v: Option<&str>) -> bool {
497 *slot = rustc_errors::LanguageIdentifier::from_str(s).ok();
504 pub(crate) fn parse_opt_pathbuf(slot: &mut Option<PathBuf>, v: Option<&str>) -> bool {
507 *slot = Some(PathBuf::from(s));
514 pub(crate) fn parse_string_push(slot: &mut Vec<String>, v: Option<&str>) -> bool {
517 slot.push(s.to_string());
524 pub(crate) fn parse_list(slot: &mut Vec<String>, v: Option<&str>) -> bool {
527 slot.extend(s.split_whitespace().map(|s| s.to_string()));
534 pub(crate) fn parse_list_with_polarity(
535 slot: &mut Vec<(String, bool)>,
540 for s in s.split(",") {
541 let Some(pass_name) = s.strip_prefix(&['+', '-'][..]) else { return false };
542 slot.push((pass_name.to_string(), &s[..1] == "+"));
550 pub(crate) fn parse_location_detail(ld: &mut LocationDetail, v: Option<&str>) -> bool {
555 for s in v.split(',') {
557 "file" => ld.file = true,
558 "line" => ld.line = true,
559 "column" => ld.column = true,
569 pub(crate) fn parse_opt_comma_list(slot: &mut Option<Vec<String>>, v: Option<&str>) -> bool {
572 let mut v: Vec<_> = s.split(',').map(|s| s.to_string()).collect();
581 pub(crate) fn parse_threads(slot: &mut usize, v: Option<&str>) -> bool {
582 match v.and_then(|s| s.parse().ok()) {
584 *slot = std::thread::available_parallelism().map_or(1, std::num::NonZeroUsize::get);
595 /// Use this for any numeric option that has a static default.
596 pub(crate) fn parse_number<T: Copy + FromStr>(slot: &mut T, v: Option<&str>) -> bool {
597 match v.and_then(|s| s.parse().ok()) {
606 /// Use this for any numeric option that lacks a static default.
607 pub(crate) fn parse_opt_number<T: Copy + FromStr>(
608 slot: &mut Option<T>,
613 *slot = s.parse().ok();
620 pub(crate) fn parse_passes(slot: &mut Passes, v: Option<&str>) -> bool {
627 let mut passes = vec![];
628 if parse_list(&mut passes, v) {
638 pub(crate) fn parse_opt_panic_strategy(
639 slot: &mut Option<PanicStrategy>,
643 Some("unwind") => *slot = Some(PanicStrategy::Unwind),
644 Some("abort") => *slot = Some(PanicStrategy::Abort),
650 pub(crate) fn parse_panic_strategy(slot: &mut PanicStrategy, v: Option<&str>) -> bool {
652 Some("unwind") => *slot = PanicStrategy::Unwind,
653 Some("abort") => *slot = PanicStrategy::Abort,
659 pub(crate) fn parse_oom_strategy(slot: &mut OomStrategy, v: Option<&str>) -> bool {
661 Some("panic") => *slot = OomStrategy::Panic,
662 Some("abort") => *slot = OomStrategy::Abort,
668 pub(crate) fn parse_relro_level(slot: &mut Option<RelroLevel>, v: Option<&str>) -> bool {
670 Some(s) => match s.parse::<RelroLevel>() {
671 Ok(level) => *slot = Some(level),
679 pub(crate) fn parse_sanitizers(slot: &mut SanitizerSet, v: Option<&str>) -> bool {
681 for s in v.split(',') {
683 "address" => SanitizerSet::ADDRESS,
684 "cfi" => SanitizerSet::CFI,
685 "leak" => SanitizerSet::LEAK,
686 "memory" => SanitizerSet::MEMORY,
687 "memtag" => SanitizerSet::MEMTAG,
688 "thread" => SanitizerSet::THREAD,
689 "hwaddress" => SanitizerSet::HWADDRESS,
699 pub(crate) fn parse_sanitizer_memory_track_origins(slot: &mut usize, v: Option<&str>) -> bool {
701 Some("2") | None => {
717 pub(crate) fn parse_strip(slot: &mut Strip, v: Option<&str>) -> bool {
719 Some("none") => *slot = Strip::None,
720 Some("debuginfo") => *slot = Strip::Debuginfo,
721 Some("symbols") => *slot = Strip::Symbols,
727 pub(crate) fn parse_cfguard(slot: &mut CFGuard, v: Option<&str>) -> bool {
729 let mut bool_arg = None;
730 if parse_opt_bool(&mut bool_arg, v) {
731 *slot = if bool_arg.unwrap() { CFGuard::Checks } else { CFGuard::Disabled };
737 None => CFGuard::Checks,
738 Some("checks") => CFGuard::Checks,
739 Some("nochecks") => CFGuard::NoChecks,
740 Some(_) => return false,
745 pub(crate) fn parse_cfprotection(slot: &mut CFProtection, v: Option<&str>) -> bool {
747 let mut bool_arg = None;
748 if parse_opt_bool(&mut bool_arg, v) {
749 *slot = if bool_arg.unwrap() { CFProtection::Full } else { CFProtection::None };
755 None | Some("none") => CFProtection::None,
756 Some("branch") => CFProtection::Branch,
757 Some("return") => CFProtection::Return,
758 Some("full") => CFProtection::Full,
759 Some(_) => return false,
764 pub(crate) fn parse_linker_flavor(slot: &mut Option<LinkerFlavor>, v: Option<&str>) -> bool {
765 match v.and_then(LinkerFlavor::from_str) {
766 Some(lf) => *slot = Some(lf),
772 pub(crate) fn parse_optimization_fuel(
773 slot: &mut Option<(String, u64)>,
779 let parts = s.split('=').collect::<Vec<_>>();
780 if parts.len() != 2 {
783 let crate_name = parts[0].to_string();
784 let fuel = parts[1].parse::<u64>();
788 *slot = Some((crate_name, fuel.unwrap()));
794 pub(crate) fn parse_unpretty(slot: &mut Option<String>, v: Option<&str>) -> bool {
797 Some(s) if s.split('=').count() <= 2 => {
798 *slot = Some(s.to_string());
805 pub(crate) fn parse_mir_spanview(slot: &mut Option<MirSpanview>, v: Option<&str>) -> bool {
807 let mut bool_arg = None;
808 if parse_opt_bool(&mut bool_arg, v) {
809 *slot = if bool_arg.unwrap() { Some(MirSpanview::Statement) } else { None };
814 let Some(v) = v else {
815 *slot = Some(MirSpanview::Statement);
819 *slot = Some(match v.trim_end_matches('s') {
820 "statement" | "stmt" => MirSpanview::Statement,
821 "terminator" | "term" => MirSpanview::Terminator,
822 "block" | "basicblock" => MirSpanview::Block,
828 pub(crate) fn parse_instrument_coverage(
829 slot: &mut Option<InstrumentCoverage>,
833 let mut bool_arg = None;
834 if parse_opt_bool(&mut bool_arg, v) {
835 *slot = if bool_arg.unwrap() { Some(InstrumentCoverage::All) } else { None };
840 let Some(v) = v else {
841 *slot = Some(InstrumentCoverage::All);
845 *slot = Some(match v {
846 "all" => InstrumentCoverage::All,
847 "except-unused-generics" | "except_unused_generics" => {
848 InstrumentCoverage::ExceptUnusedGenerics
850 "except-unused-functions" | "except_unused_functions" => {
851 InstrumentCoverage::ExceptUnusedFunctions
853 "off" | "no" | "n" | "false" | "0" => InstrumentCoverage::Off,
859 pub(crate) fn parse_treat_err_as_bug(slot: &mut Option<NonZeroUsize>, v: Option<&str>) -> bool {
862 *slot = s.parse().ok();
866 *slot = NonZeroUsize::new(1);
872 pub(crate) fn parse_lto(slot: &mut LtoCli, v: Option<&str>) -> bool {
874 let mut bool_arg = None;
875 if parse_opt_bool(&mut bool_arg, v) {
876 *slot = if bool_arg.unwrap() { LtoCli::Yes } else { LtoCli::No };
882 None => LtoCli::NoParam,
883 Some("thin") => LtoCli::Thin,
884 Some("fat") => LtoCli::Fat,
885 Some(_) => return false,
890 pub(crate) fn parse_linker_plugin_lto(slot: &mut LinkerPluginLto, v: Option<&str>) -> bool {
892 let mut bool_arg = None;
893 if parse_opt_bool(&mut bool_arg, v) {
894 *slot = if bool_arg.unwrap() {
895 LinkerPluginLto::LinkerPluginAuto
897 LinkerPluginLto::Disabled
904 None => LinkerPluginLto::LinkerPluginAuto,
905 Some(path) => LinkerPluginLto::LinkerPlugin(PathBuf::from(path)),
910 pub(crate) fn parse_switch_with_opt_path(
911 slot: &mut SwitchWithOptPath,
915 None => SwitchWithOptPath::Enabled(None),
916 Some(path) => SwitchWithOptPath::Enabled(Some(PathBuf::from(path))),
921 pub(crate) fn parse_merge_functions(
922 slot: &mut Option<MergeFunctions>,
925 match v.and_then(|s| MergeFunctions::from_str(s).ok()) {
926 Some(mergefunc) => *slot = Some(mergefunc),
932 pub(crate) fn parse_relocation_model(slot: &mut Option<RelocModel>, v: Option<&str>) -> bool {
933 match v.and_then(|s| RelocModel::from_str(s).ok()) {
934 Some(relocation_model) => *slot = Some(relocation_model),
935 None if v == Some("default") => *slot = None,
941 pub(crate) fn parse_code_model(slot: &mut Option<CodeModel>, v: Option<&str>) -> bool {
942 match v.and_then(|s| CodeModel::from_str(s).ok()) {
943 Some(code_model) => *slot = Some(code_model),
949 pub(crate) fn parse_tls_model(slot: &mut Option<TlsModel>, v: Option<&str>) -> bool {
950 match v.and_then(|s| TlsModel::from_str(s).ok()) {
951 Some(tls_model) => *slot = Some(tls_model),
957 pub(crate) fn parse_symbol_mangling_version(
958 slot: &mut Option<SymbolManglingVersion>,
962 Some("legacy") => Some(SymbolManglingVersion::Legacy),
963 Some("v0") => Some(SymbolManglingVersion::V0),
969 pub(crate) fn parse_src_file_hash(
970 slot: &mut Option<SourceFileHashAlgorithm>,
973 match v.and_then(|s| SourceFileHashAlgorithm::from_str(s).ok()) {
974 Some(hash_kind) => *slot = Some(hash_kind),
980 pub(crate) fn parse_target_feature(slot: &mut String, v: Option<&str>) -> bool {
983 if !slot.is_empty() {
993 pub(crate) fn parse_wasi_exec_model(slot: &mut Option<WasiExecModel>, v: Option<&str>) -> bool {
995 Some("command") => *slot = Some(WasiExecModel::Command),
996 Some("reactor") => *slot = Some(WasiExecModel::Reactor),
1002 pub(crate) fn parse_split_debuginfo(
1003 slot: &mut Option<SplitDebuginfo>,
1006 match v.and_then(|s| SplitDebuginfo::from_str(s).ok()) {
1007 Some(e) => *slot = Some(e),
1013 pub(crate) fn parse_split_dwarf_kind(slot: &mut SplitDwarfKind, v: Option<&str>) -> bool {
1014 match v.and_then(|s| SplitDwarfKind::from_str(s).ok()) {
1015 Some(e) => *slot = e,
1021 pub(crate) fn parse_gcc_ld(slot: &mut Option<LdImpl>, v: Option<&str>) -> bool {
1023 None => *slot = None,
1024 Some("lld") => *slot = Some(LdImpl::Lld),
1030 pub(crate) fn parse_stack_protector(slot: &mut StackProtector, v: Option<&str>) -> bool {
1031 match v.and_then(|s| StackProtector::from_str(s).ok()) {
1032 Some(ssp) => *slot = ssp,
1038 pub(crate) fn parse_branch_protection(
1039 slot: &mut Option<BranchProtection>,
1044 let slot = slot.get_or_insert_default();
1045 for opt in s.split(',') {
1047 "bti" => slot.bti = true,
1048 "pac-ret" if slot.pac_ret.is_none() => {
1049 slot.pac_ret = Some(PacRet { leaf: false, key: PAuthKey::A })
1051 "leaf" => match slot.pac_ret.as_mut() {
1052 Some(pac) => pac.leaf = true,
1055 "b-key" => match slot.pac_ret.as_mut() {
1056 Some(pac) => pac.key = PAuthKey::B,
1070 CodegenOptions, CG_OPTIONS, cgopts, "C", "codegen",
1072 // This list is in alphabetical order.
1074 // If you add a new option, please update:
1075 // - compiler/rustc_interface/src/tests.rs
1076 // - src/doc/rustc/src/codegen-options/index.md
1078 ar: String = (String::new(), parse_string, [UNTRACKED],
1079 "this option is deprecated and does nothing"),
1080 code_model: Option<CodeModel> = (None, parse_code_model, [TRACKED],
1081 "choose the code model to use (`rustc --print code-models` for details)"),
1082 codegen_units: Option<usize> = (None, parse_opt_number, [UNTRACKED],
1083 "divide crate into N units to optimize in parallel"),
1084 control_flow_guard: CFGuard = (CFGuard::Disabled, parse_cfguard, [TRACKED],
1085 "use Windows Control Flow Guard (default: no)"),
1086 debug_assertions: Option<bool> = (None, parse_opt_bool, [TRACKED],
1087 "explicitly enable the `cfg(debug_assertions)` directive"),
1088 debuginfo: usize = (0, parse_number, [TRACKED],
1089 "debug info emission level (0 = no debug info, 1 = line tables only, \
1090 2 = full debug info with variable and type information; default: 0)"),
1091 default_linker_libraries: bool = (false, parse_bool, [UNTRACKED],
1092 "allow the linker to link its default libraries (default: no)"),
1093 embed_bitcode: bool = (true, parse_bool, [TRACKED],
1094 "emit bitcode in rlibs (default: yes)"),
1095 extra_filename: String = (String::new(), parse_string, [UNTRACKED],
1096 "extra data to put in each output filename"),
1097 force_frame_pointers: Option<bool> = (None, parse_opt_bool, [TRACKED],
1098 "force use of the frame pointers"),
1099 force_unwind_tables: Option<bool> = (None, parse_opt_bool, [TRACKED],
1100 "force use of unwind tables"),
1101 incremental: Option<String> = (None, parse_opt_string, [UNTRACKED],
1102 "enable incremental compilation"),
1103 inline_threshold: Option<u32> = (None, parse_opt_number, [TRACKED],
1104 "set the threshold for inlining a function"),
1105 instrument_coverage: Option<InstrumentCoverage> = (None, parse_instrument_coverage, [TRACKED],
1106 "instrument the generated code to support LLVM source-based code coverage \
1107 reports (note, the compiler build config must include `profiler = true`); \
1108 implies `-C symbol-mangling-version=v0`. Optional values are:
1109 `=all` (implicit value)
1110 `=except-unused-generics`
1111 `=except-unused-functions`
1113 link_arg: (/* redirected to link_args */) = ((), parse_string_push, [UNTRACKED],
1114 "a single extra argument to append to the linker invocation (can be used several times)"),
1115 link_args: Vec<String> = (Vec::new(), parse_list, [UNTRACKED],
1116 "extra arguments to append to the linker invocation (space separated)"),
1117 link_dead_code: Option<bool> = (None, parse_opt_bool, [TRACKED],
1118 "keep dead code at link time (useful for code coverage) (default: no)"),
1119 link_self_contained: Option<bool> = (None, parse_opt_bool, [UNTRACKED],
1120 "control whether to link Rust provided C objects/libraries or rely
1121 on C toolchain installed in the system"),
1122 linker: Option<PathBuf> = (None, parse_opt_pathbuf, [UNTRACKED],
1123 "system linker to link outputs with"),
1124 linker_flavor: Option<LinkerFlavor> = (None, parse_linker_flavor, [UNTRACKED],
1126 linker_plugin_lto: LinkerPluginLto = (LinkerPluginLto::Disabled,
1127 parse_linker_plugin_lto, [TRACKED],
1128 "generate build artifacts that are compatible with linker-based LTO"),
1129 llvm_args: Vec<String> = (Vec::new(), parse_list, [TRACKED],
1130 "a list of arguments to pass to LLVM (space separated)"),
1131 lto: LtoCli = (LtoCli::Unspecified, parse_lto, [TRACKED],
1132 "perform LLVM link-time optimizations"),
1133 metadata: Vec<String> = (Vec::new(), parse_list, [TRACKED],
1134 "metadata to mangle symbol names with"),
1135 no_prepopulate_passes: bool = (false, parse_no_flag, [TRACKED],
1136 "give an empty list of passes to the pass manager"),
1137 no_redzone: Option<bool> = (None, parse_opt_bool, [TRACKED],
1138 "disable the use of the redzone"),
1139 no_stack_check: bool = (false, parse_no_flag, [UNTRACKED],
1140 "this option is deprecated and does nothing"),
1141 no_vectorize_loops: bool = (false, parse_no_flag, [TRACKED],
1142 "disable loop vectorization optimization passes"),
1143 no_vectorize_slp: bool = (false, parse_no_flag, [TRACKED],
1144 "disable LLVM's SLP vectorization pass"),
1145 opt_level: String = ("0".to_string(), parse_string, [TRACKED],
1146 "optimization level (0-3, s, or z; default: 0)"),
1147 overflow_checks: Option<bool> = (None, parse_opt_bool, [TRACKED],
1148 "use overflow checks for integer arithmetic"),
1149 panic: Option<PanicStrategy> = (None, parse_opt_panic_strategy, [TRACKED],
1150 "panic strategy to compile crate with"),
1151 passes: Vec<String> = (Vec::new(), parse_list, [TRACKED],
1152 "a list of extra LLVM passes to run (space separated)"),
1153 prefer_dynamic: bool = (false, parse_bool, [TRACKED],
1154 "prefer dynamic linking to static linking (default: no)"),
1155 profile_generate: SwitchWithOptPath = (SwitchWithOptPath::Disabled,
1156 parse_switch_with_opt_path, [TRACKED],
1157 "compile the program with profiling instrumentation"),
1158 profile_use: Option<PathBuf> = (None, parse_opt_pathbuf, [TRACKED],
1159 "use the given `.profdata` file for profile-guided optimization"),
1160 relocation_model: Option<RelocModel> = (None, parse_relocation_model, [TRACKED],
1161 "control generation of position-independent code (PIC) \
1162 (`rustc --print relocation-models` for details)"),
1163 remark: Passes = (Passes::Some(Vec::new()), parse_passes, [UNTRACKED],
1164 "print remarks for these optimization passes (space separated, or \"all\")"),
1165 rpath: bool = (false, parse_bool, [UNTRACKED],
1166 "set rpath values in libs/exes (default: no)"),
1167 save_temps: bool = (false, parse_bool, [UNTRACKED],
1168 "save all temporary output files during compilation (default: no)"),
1169 soft_float: bool = (false, parse_bool, [TRACKED],
1170 "use soft float ABI (*eabihf targets only) (default: no)"),
1171 split_debuginfo: Option<SplitDebuginfo> = (None, parse_split_debuginfo, [TRACKED],
1172 "how to handle split-debuginfo, a platform-specific option"),
1173 strip: Strip = (Strip::None, parse_strip, [UNTRACKED],
1174 "tell the linker which information to strip (`none` (default), `debuginfo` or `symbols`)"),
1175 symbol_mangling_version: Option<SymbolManglingVersion> = (None,
1176 parse_symbol_mangling_version, [TRACKED],
1177 "which mangling version to use for symbol names ('legacy' (default) or 'v0')"),
1178 target_cpu: Option<String> = (None, parse_opt_string, [TRACKED],
1179 "select target processor (`rustc --print target-cpus` for details)"),
1180 target_feature: String = (String::new(), parse_target_feature, [TRACKED],
1181 "target specific attributes. (`rustc --print target-features` for details). \
1182 This feature is unsafe."),
1184 // This list is in alphabetical order.
1186 // If you add a new option, please update:
1187 // - compiler/rustc_interface/src/tests.rs
1188 // - src/doc/rustc/src/codegen-options/index.md
1192 DebuggingOptions, DB_OPTIONS, dbopts, "Z", "debugging",
1194 // This list is in alphabetical order.
1196 // If you add a new option, please update:
1197 // - compiler/rustc_interface/src/tests.rs
1199 allow_features: Option<Vec<String>> = (None, parse_opt_comma_list, [TRACKED],
1200 "only allow the listed language features to be enabled in code (space separated)"),
1201 always_encode_mir: bool = (false, parse_bool, [TRACKED],
1202 "encode MIR of all functions into the crate metadata (default: no)"),
1203 assume_incomplete_release: bool = (false, parse_bool, [TRACKED],
1204 "make cfg(version) treat the current version as incomplete (default: no)"),
1205 asm_comments: bool = (false, parse_bool, [TRACKED],
1206 "generate comments into the assembly (may change behavior) (default: no)"),
1207 assert_incr_state: Option<String> = (None, parse_opt_string, [UNTRACKED],
1208 "assert that the incremental cache is in given state: \
1209 either `loaded` or `not-loaded`."),
1210 ast_json: bool = (false, parse_bool, [UNTRACKED],
1211 "print the AST as JSON and halt (default: no)"),
1212 ast_json_noexpand: bool = (false, parse_bool, [UNTRACKED],
1213 "print the pre-expansion AST as JSON and halt (default: no)"),
1214 binary_dep_depinfo: bool = (false, parse_bool, [TRACKED],
1215 "include artifacts (sysroot, crate dependencies) used during compilation in dep-info \
1217 borrowck: String = ("migrate".to_string(), parse_string, [UNTRACKED],
1218 "select which borrowck is used (`mir` or `migrate`) (default: `migrate`)"),
1219 branch_protection: Option<BranchProtection> = (None, parse_branch_protection, [TRACKED],
1220 "set options for branch target identification and pointer authentication on AArch64"),
1221 cf_protection: CFProtection = (CFProtection::None, parse_cfprotection, [TRACKED],
1222 "instrument control-flow architecture protection"),
1223 cgu_partitioning_strategy: Option<String> = (None, parse_opt_string, [TRACKED],
1224 "the codegen unit partitioning strategy to use"),
1225 chalk: bool = (false, parse_bool, [TRACKED],
1226 "enable the experimental Chalk-based trait solving engine"),
1227 codegen_backend: Option<String> = (None, parse_opt_string, [TRACKED],
1228 "the backend to use"),
1229 combine_cgu: bool = (false, parse_bool, [TRACKED],
1230 "combine CGUs into a single one"),
1231 crate_attr: Vec<String> = (Vec::new(), parse_string_push, [TRACKED],
1232 "inject the given attribute in the crate"),
1233 debug_info_for_profiling: bool = (false, parse_bool, [TRACKED],
1234 "emit discriminators and other data necessary for AutoFDO"),
1235 debug_macros: bool = (false, parse_bool, [TRACKED],
1236 "emit line numbers debug info inside macros (default: no)"),
1237 deduplicate_diagnostics: bool = (true, parse_bool, [UNTRACKED],
1238 "deduplicate identical diagnostics (default: yes)"),
1239 dep_info_omit_d_target: bool = (false, parse_bool, [TRACKED],
1240 "in dep-info output, omit targets for tracking dependencies of the dep-info files \
1241 themselves (default: no)"),
1242 dep_tasks: bool = (false, parse_bool, [UNTRACKED],
1243 "print tasks that execute and the color their dep node gets (requires debug build) \
1245 dlltool: Option<PathBuf> = (None, parse_opt_pathbuf, [UNTRACKED],
1246 "import library generation tool (windows-gnu only)"),
1247 dont_buffer_diagnostics: bool = (false, parse_bool, [UNTRACKED],
1248 "emit diagnostics rather than buffering (breaks NLL error downgrading, sorting) \
1250 drop_tracking: bool = (false, parse_bool, [TRACKED],
1251 "enables drop tracking in generators (default: no)"),
1252 dual_proc_macros: bool = (false, parse_bool, [TRACKED],
1253 "load proc macros for both target and host, but only link to the target (default: no)"),
1254 dump_dep_graph: bool = (false, parse_bool, [UNTRACKED],
1255 "dump the dependency graph to $RUST_DEP_GRAPH (default: /tmp/dep_graph.gv) \
1257 dump_mir: Option<String> = (None, parse_opt_string, [UNTRACKED],
1258 "dump MIR state to file.
1259 `val` is used to select which passes and functions to dump. For example:
1260 `all` matches all passes and functions,
1261 `foo` matches all passes for functions whose name contains 'foo',
1262 `foo & ConstProp` only the 'ConstProp' pass for function names containing 'foo',
1263 `foo | bar` all passes for function names containing 'foo' or 'bar'."),
1264 dump_mir_dataflow: bool = (false, parse_bool, [UNTRACKED],
1265 "in addition to `.mir` files, create graphviz `.dot` files with dataflow results \
1267 dump_mir_dir: String = ("mir_dump".to_string(), parse_string, [UNTRACKED],
1268 "the directory the MIR is dumped into (default: `mir_dump`)"),
1269 dump_mir_exclude_pass_number: bool = (false, parse_bool, [UNTRACKED],
1270 "exclude the pass number when dumping MIR (used in tests) (default: no)"),
1271 dump_mir_graphviz: bool = (false, parse_bool, [UNTRACKED],
1272 "in addition to `.mir` files, create graphviz `.dot` files (and with \
1273 `-Z instrument-coverage`, also create a `.dot` file for the MIR-derived \
1274 coverage graph) (default: no)"),
1275 dump_mir_spanview: Option<MirSpanview> = (None, parse_mir_spanview, [UNTRACKED],
1276 "in addition to `.mir` files, create `.html` files to view spans for \
1277 all `statement`s (including terminators), only `terminator` spans, or \
1278 computed `block` spans (one span encompassing a block's terminator and \
1279 all statements). If `-Z instrument-coverage` is also enabled, create \
1280 an additional `.html` file showing the computed coverage spans."),
1281 emit_stack_sizes: bool = (false, parse_bool, [UNTRACKED],
1282 "emit a section containing stack size metadata (default: no)"),
1283 fewer_names: Option<bool> = (None, parse_opt_bool, [TRACKED],
1284 "reduce memory use by retaining fewer names within compilation artifacts (LLVM-IR) \
1286 force_unstable_if_unmarked: bool = (false, parse_bool, [TRACKED],
1287 "force all crates to be `rustc_private` unstable (default: no)"),
1288 fuel: Option<(String, u64)> = (None, parse_optimization_fuel, [TRACKED],
1289 "set the optimization fuel quota for a crate"),
1290 function_sections: Option<bool> = (None, parse_opt_bool, [TRACKED],
1291 "whether each function should go in its own section"),
1292 future_incompat_test: bool = (false, parse_bool, [UNTRACKED],
1293 "forces all lints to be future incompatible, used for internal testing (default: no)"),
1294 gcc_ld: Option<LdImpl> = (None, parse_gcc_ld, [TRACKED], "implementation of ld used by cc"),
1295 graphviz_dark_mode: bool = (false, parse_bool, [UNTRACKED],
1296 "use dark-themed colors in graphviz output (default: no)"),
1297 graphviz_font: String = ("Courier, monospace".to_string(), parse_string, [UNTRACKED],
1298 "use the given `fontname` in graphviz output; can be overridden by setting \
1299 environment variable `RUSTC_GRAPHVIZ_FONT` (default: `Courier, monospace`)"),
1300 hir_stats: bool = (false, parse_bool, [UNTRACKED],
1301 "print some statistics about AST and HIR (default: no)"),
1302 human_readable_cgu_names: bool = (false, parse_bool, [TRACKED],
1303 "generate human-readable, predictable names for codegen units (default: no)"),
1304 identify_regions: bool = (false, parse_bool, [UNTRACKED],
1305 "display unnamed regions as `'<id>`, using a non-ident unique id (default: no)"),
1306 incremental_ignore_spans: bool = (false, parse_bool, [UNTRACKED],
1307 "ignore spans during ICH computation -- used for testing (default: no)"),
1308 incremental_info: bool = (false, parse_bool, [UNTRACKED],
1309 "print high-level information about incremental reuse (or the lack thereof) \
1311 incremental_relative_spans: bool = (false, parse_bool, [TRACKED],
1312 "hash spans relative to their parent item for incr. comp. (default: no)"),
1313 incremental_verify_ich: bool = (false, parse_bool, [UNTRACKED],
1314 "verify incr. comp. hashes of green query instances (default: no)"),
1315 inline_mir: Option<bool> = (None, parse_opt_bool, [TRACKED],
1316 "enable MIR inlining (default: no)"),
1317 inline_mir_threshold: Option<usize> = (None, parse_opt_number, [TRACKED],
1318 "a default MIR inlining threshold (default: 50)"),
1319 inline_mir_hint_threshold: Option<usize> = (None, parse_opt_number, [TRACKED],
1320 "inlining threshold for functions with inline hint (default: 100)"),
1321 inline_in_all_cgus: Option<bool> = (None, parse_opt_bool, [TRACKED],
1322 "control whether `#[inline]` functions are in all CGUs"),
1323 input_stats: bool = (false, parse_bool, [UNTRACKED],
1324 "gather statistics about the input (default: no)"),
1325 instrument_coverage: Option<InstrumentCoverage> = (None, parse_instrument_coverage, [TRACKED],
1326 "instrument the generated code to support LLVM source-based code coverage \
1327 reports (note, the compiler build config must include `profiler = true`); \
1328 implies `-C symbol-mangling-version=v0`. Optional values are:
1329 `=all` (implicit value)
1330 `=except-unused-generics`
1331 `=except-unused-functions`
1333 instrument_mcount: bool = (false, parse_bool, [TRACKED],
1334 "insert function instrument code for mcount-based tracing (default: no)"),
1335 keep_hygiene_data: bool = (false, parse_bool, [UNTRACKED],
1336 "keep hygiene data after analysis (default: no)"),
1337 link_native_libraries: bool = (true, parse_bool, [UNTRACKED],
1338 "link native libraries in the linker invocation (default: yes)"),
1339 link_only: bool = (false, parse_bool, [TRACKED],
1340 "link the `.rlink` file generated by `-Z no-link` (default: no)"),
1341 llvm_plugins: Vec<String> = (Vec::new(), parse_list, [TRACKED],
1342 "a list LLVM plugins to enable (space separated)"),
1343 llvm_time_trace: bool = (false, parse_bool, [UNTRACKED],
1344 "generate JSON tracing data file from LLVM data (default: no)"),
1345 location_detail: LocationDetail = (LocationDetail::all(), parse_location_detail, [TRACKED],
1346 "comma separated list of location details to be tracked when using caller_location \
1347 valid options are `file`, `line`, and `column` (default: all)"),
1348 ls: bool = (false, parse_bool, [UNTRACKED],
1349 "list the symbols defined by a library crate (default: no)"),
1350 macro_backtrace: bool = (false, parse_bool, [UNTRACKED],
1351 "show macro backtraces (default: no)"),
1352 merge_functions: Option<MergeFunctions> = (None, parse_merge_functions, [TRACKED],
1353 "control the operation of the MergeFunctions LLVM pass, taking \
1354 the same values as the target option of the same name"),
1355 meta_stats: bool = (false, parse_bool, [UNTRACKED],
1356 "gather metadata statistics (default: no)"),
1357 mir_emit_retag: bool = (false, parse_bool, [TRACKED],
1358 "emit Retagging MIR statements, interpreted e.g., by miri; implies -Zmir-opt-level=0 \
1360 mir_enable_passes: Vec<(String, bool)> = (Vec::new(), parse_list_with_polarity, [TRACKED],
1361 "use like `-Zmir-enable-passes=+DestProp,-InstCombine`. Forces the specified passes to be \
1362 enabled, overriding all other checks. Passes that are not specified are enabled or \
1363 disabled by other flags as usual."),
1364 mir_opt_level: Option<usize> = (None, parse_opt_number, [TRACKED],
1365 "MIR optimization level (0-4; default: 1 in non optimized builds and 2 in optimized builds)"),
1366 move_size_limit: Option<usize> = (None, parse_opt_number, [TRACKED],
1367 "the size at which the `large_assignments` lint starts to be emitted"),
1368 mutable_noalias: Option<bool> = (None, parse_opt_bool, [TRACKED],
1369 "emit noalias metadata for mutable references (default: yes)"),
1370 new_llvm_pass_manager: Option<bool> = (None, parse_opt_bool, [TRACKED],
1371 "use new LLVM pass manager (default: no)"),
1372 nll_facts: bool = (false, parse_bool, [UNTRACKED],
1373 "dump facts from NLL analysis into side files (default: no)"),
1374 nll_facts_dir: String = ("nll-facts".to_string(), parse_string, [UNTRACKED],
1375 "the directory the NLL facts are dumped into (default: `nll-facts`)"),
1376 no_analysis: bool = (false, parse_no_flag, [UNTRACKED],
1377 "parse and expand the source, but run no analysis"),
1378 no_codegen: bool = (false, parse_no_flag, [TRACKED_NO_CRATE_HASH],
1379 "run all passes except codegen; no output"),
1380 no_generate_arange_section: bool = (false, parse_no_flag, [TRACKED],
1381 "omit DWARF address ranges that give faster lookups"),
1382 no_interleave_lints: bool = (false, parse_no_flag, [UNTRACKED],
1383 "execute lints separately; allows benchmarking individual lints"),
1384 no_leak_check: bool = (false, parse_no_flag, [UNTRACKED],
1385 "disable the 'leak check' for subtyping; unsound, but useful for tests"),
1386 no_link: bool = (false, parse_no_flag, [TRACKED],
1387 "compile without linking"),
1388 no_parallel_llvm: bool = (false, parse_no_flag, [UNTRACKED],
1389 "run LLVM in non-parallel mode (while keeping codegen-units and ThinLTO)"),
1390 no_unique_section_names: bool = (false, parse_bool, [TRACKED],
1391 "do not use unique names for text and data sections when -Z function-sections is used"),
1392 no_profiler_runtime: bool = (false, parse_no_flag, [TRACKED],
1393 "prevent automatic injection of the profiler_builtins crate"),
1394 normalize_docs: bool = (false, parse_bool, [TRACKED],
1395 "normalize associated items in rustdoc when generating documentation"),
1396 oom: OomStrategy = (OomStrategy::Abort, parse_oom_strategy, [TRACKED],
1397 "panic strategy for out-of-memory handling"),
1398 osx_rpath_install_name: bool = (false, parse_bool, [TRACKED],
1399 "pass `-install_name @rpath/...` to the macOS linker (default: no)"),
1400 panic_abort_tests: bool = (false, parse_bool, [TRACKED],
1401 "support compiling tests with panic=abort (default: no)"),
1402 panic_in_drop: PanicStrategy = (PanicStrategy::Unwind, parse_panic_strategy, [TRACKED],
1403 "panic strategy for panics in drops"),
1404 parse_only: bool = (false, parse_bool, [UNTRACKED],
1405 "parse only; do not compile, assemble, or link (default: no)"),
1406 perf_stats: bool = (false, parse_bool, [UNTRACKED],
1407 "print some performance-related statistics (default: no)"),
1408 pick_stable_methods_before_any_unstable: bool = (true, parse_bool, [TRACKED],
1409 "try to pick stable methods first before picking any unstable methods (default: yes)"),
1410 plt: Option<bool> = (None, parse_opt_bool, [TRACKED],
1411 "whether to use the PLT when calling into shared libraries;
1412 only has effect for PIC code on systems with ELF binaries
1413 (default: PLT is disabled if full relro is enabled)"),
1414 polonius: bool = (false, parse_bool, [TRACKED],
1415 "enable polonius-based borrow-checker (default: no)"),
1416 polymorphize: bool = (false, parse_bool, [TRACKED],
1417 "perform polymorphization analysis"),
1418 pre_link_arg: (/* redirected to pre_link_args */) = ((), parse_string_push, [UNTRACKED],
1419 "a single extra argument to prepend the linker invocation (can be used several times)"),
1420 pre_link_args: Vec<String> = (Vec::new(), parse_list, [UNTRACKED],
1421 "extra arguments to prepend to the linker invocation (space separated)"),
1422 precise_enum_drop_elaboration: bool = (true, parse_bool, [TRACKED],
1423 "use a more precise version of drop elaboration for matches on enums (default: yes). \
1424 This results in better codegen, but has caused miscompilations on some tier 2 platforms. \
1425 See #77382 and #74551."),
1426 print_fuel: Option<String> = (None, parse_opt_string, [TRACKED],
1427 "make rustc print the total optimization fuel used by a crate"),
1428 print_llvm_passes: bool = (false, parse_bool, [UNTRACKED],
1429 "print the LLVM optimization passes being run (default: no)"),
1430 print_mono_items: Option<String> = (None, parse_opt_string, [UNTRACKED],
1431 "print the result of the monomorphization collection pass"),
1432 print_type_sizes: bool = (false, parse_bool, [UNTRACKED],
1433 "print layout information for each type encountered (default: no)"),
1434 proc_macro_backtrace: bool = (false, parse_bool, [UNTRACKED],
1435 "show backtraces for panics during proc-macro execution (default: no)"),
1436 profile: bool = (false, parse_bool, [TRACKED],
1437 "insert profiling code (default: no)"),
1438 profile_closures: bool = (false, parse_no_flag, [UNTRACKED],
1439 "profile size of closures"),
1440 profile_emit: Option<PathBuf> = (None, parse_opt_pathbuf, [TRACKED],
1441 "file path to emit profiling data at runtime when using 'profile' \
1442 (default based on relative source path)"),
1443 profiler_runtime: String = (String::from("profiler_builtins"), parse_string, [TRACKED],
1444 "name of the profiler runtime crate to automatically inject (default: `profiler_builtins`)"),
1445 profile_sample_use: Option<PathBuf> = (None, parse_opt_pathbuf, [TRACKED],
1446 "use the given `.prof` file for sampled profile-guided optimization (also known as AutoFDO)"),
1447 query_dep_graph: bool = (false, parse_bool, [UNTRACKED],
1448 "enable queries of the dependency graph for regression testing (default: no)"),
1449 randomize_layout: bool = (false, parse_bool, [TRACKED],
1450 "randomize the layout of types (default: no)"),
1451 layout_seed: Option<u64> = (None, parse_opt_number, [TRACKED],
1452 "seed layout randomization"),
1453 relax_elf_relocations: Option<bool> = (None, parse_opt_bool, [TRACKED],
1454 "whether ELF relocations can be relaxed"),
1455 relro_level: Option<RelroLevel> = (None, parse_relro_level, [TRACKED],
1456 "choose which RELRO level to use"),
1457 remap_cwd_prefix: Option<PathBuf> = (None, parse_opt_pathbuf, [TRACKED],
1458 "remap paths under the current working directory to this path prefix"),
1459 simulate_remapped_rust_src_base: Option<PathBuf> = (None, parse_opt_pathbuf, [TRACKED],
1460 "simulate the effect of remap-debuginfo = true at bootstrapping by remapping path \
1461 to rust's source base directory. only meant for testing purposes"),
1462 report_delayed_bugs: bool = (false, parse_bool, [TRACKED],
1463 "immediately print bugs registered with `delay_span_bug` (default: no)"),
1464 sanitizer: SanitizerSet = (SanitizerSet::empty(), parse_sanitizers, [TRACKED],
1466 sanitizer_memory_track_origins: usize = (0, parse_sanitizer_memory_track_origins, [TRACKED],
1467 "enable origins tracking in MemorySanitizer"),
1468 sanitizer_recover: SanitizerSet = (SanitizerSet::empty(), parse_sanitizers, [TRACKED],
1469 "enable recovery for selected sanitizers"),
1470 saturating_float_casts: Option<bool> = (None, parse_opt_bool, [TRACKED],
1471 "make float->int casts UB-free: numbers outside the integer type's range are clipped to \
1472 the max/min integer respectively, and NaN is mapped to 0 (default: yes)"),
1473 save_analysis: bool = (false, parse_bool, [UNTRACKED],
1474 "write syntax and type analysis (in JSON format) information, in \
1475 addition to normal output (default: no)"),
1476 self_profile: SwitchWithOptPath = (SwitchWithOptPath::Disabled,
1477 parse_switch_with_opt_path, [UNTRACKED],
1478 "run the self profiler and output the raw event data"),
1479 /// keep this in sync with the event filter names in librustc_data_structures/profiling.rs
1480 self_profile_events: Option<Vec<String>> = (None, parse_opt_comma_list, [UNTRACKED],
1481 "specify the events recorded by the self profiler;
1482 for example: `-Z self-profile-events=default,query-keys`
1483 all options: none, all, default, generic-activity, query-provider, query-cache-hit
1484 query-blocked, incr-cache-load, incr-result-hashing, query-keys, function-args, args, llvm, artifact-sizes"),
1485 share_generics: Option<bool> = (None, parse_opt_bool, [TRACKED],
1486 "make the current crate share its generic instantiations"),
1487 show_span: Option<String> = (None, parse_opt_string, [TRACKED],
1488 "show spans for compiler debugging (expr|pat|ty)"),
1489 span_debug: bool = (false, parse_bool, [UNTRACKED],
1490 "forward proc_macro::Span's `Debug` impl to `Span`"),
1491 /// o/w tests have closure@path
1492 span_free_formats: bool = (false, parse_bool, [UNTRACKED],
1493 "exclude spans when debug-printing compiler state (default: no)"),
1494 src_hash_algorithm: Option<SourceFileHashAlgorithm> = (None, parse_src_file_hash, [TRACKED],
1495 "hash algorithm of source files in debug info (`md5`, `sha1`, or `sha256`)"),
1496 stack_protector: StackProtector = (StackProtector::None, parse_stack_protector, [TRACKED],
1497 "control stack smash protection strategy (`rustc --print stack-protector-strategies` for details)"),
1498 strict_init_checks: bool = (false, parse_bool, [TRACKED],
1499 "control if mem::uninitialized and mem::zeroed panic on more UB"),
1500 strip: Strip = (Strip::None, parse_strip, [UNTRACKED],
1501 "tell the linker which information to strip (`none` (default), `debuginfo` or `symbols`)"),
1502 split_dwarf_kind: SplitDwarfKind = (SplitDwarfKind::Split, parse_split_dwarf_kind, [UNTRACKED],
1503 "split dwarf variant (only if -Csplit-debuginfo is enabled and on relevant platform)
1506 `split`: sections which do not require relocation are written into a DWARF object (`.dwo`)
1507 file which is ignored by the linker
1508 `single`: sections which do not require relocation are written into object file but ignored
1510 split_dwarf_inlining: bool = (true, parse_bool, [UNTRACKED],
1511 "provide minimal debug info in the object/executable to facilitate online \
1512 symbolication/stack traces in the absence of .dwo/.dwp files when using Split DWARF"),
1513 symbol_mangling_version: Option<SymbolManglingVersion> = (None,
1514 parse_symbol_mangling_version, [TRACKED],
1515 "which mangling version to use for symbol names ('legacy' (default) or 'v0')"),
1516 teach: bool = (false, parse_bool, [TRACKED],
1517 "show extended diagnostic help (default: no)"),
1518 temps_dir: Option<String> = (None, parse_opt_string, [UNTRACKED],
1519 "the directory the intermediate files are written to"),
1520 terminal_width: Option<usize> = (None, parse_opt_number, [UNTRACKED],
1521 "set the current terminal width"),
1522 // Diagnostics are considered side-effects of a query (see `QuerySideEffects`) and are saved
1523 // alongside query results and changes to translation options can affect diagnostics - so
1524 // translation options should be tracked.
1525 translate_lang: Option<LanguageIdentifier> = (None, parse_opt_langid, [TRACKED],
1526 "language identifier for diagnostic output"),
1527 translate_additional_ftl: Option<PathBuf> = (None, parse_opt_pathbuf, [TRACKED],
1528 "additional fluent translation to preferentially use (for testing translation)"),
1529 translate_directionality_markers: bool = (false, parse_bool, [TRACKED],
1530 "emit directionality isolation markers in translated diagnostics"),
1531 tune_cpu: Option<String> = (None, parse_opt_string, [TRACKED],
1532 "select processor to schedule for (`rustc --print target-cpus` for details)"),
1533 thinlto: Option<bool> = (None, parse_opt_bool, [TRACKED],
1534 "enable ThinLTO when possible"),
1535 thir_unsafeck: bool = (false, parse_bool, [TRACKED],
1536 "use the THIR unsafety checker (default: no)"),
1537 /// We default to 1 here since we want to behave like
1538 /// a sequential compiler for now. This'll likely be adjusted
1539 /// in the future. Note that -Zthreads=0 is the way to get
1540 /// the num_cpus behavior.
1541 threads: usize = (1, parse_threads, [UNTRACKED],
1542 "use a thread pool with N threads"),
1543 time: bool = (false, parse_bool, [UNTRACKED],
1544 "measure time of rustc processes (default: no)"),
1545 time_llvm_passes: bool = (false, parse_bool, [UNTRACKED],
1546 "measure time of each LLVM pass (default: no)"),
1547 time_passes: bool = (false, parse_bool, [UNTRACKED],
1548 "measure time of each rustc pass (default: no)"),
1549 tls_model: Option<TlsModel> = (None, parse_tls_model, [TRACKED],
1550 "choose the TLS model to use (`rustc --print tls-models` for details)"),
1551 trace_macros: bool = (false, parse_bool, [UNTRACKED],
1552 "for every macro invocation, print its name and arguments (default: no)"),
1553 trap_unreachable: Option<bool> = (None, parse_opt_bool, [TRACKED],
1554 "generate trap instructions for unreachable intrinsics (default: use target setting, usually yes)"),
1555 treat_err_as_bug: Option<NonZeroUsize> = (None, parse_treat_err_as_bug, [TRACKED],
1556 "treat error number `val` that occurs as bug"),
1557 trim_diagnostic_paths: bool = (true, parse_bool, [UNTRACKED],
1558 "in diagnostics, use heuristics to shorten paths referring to items"),
1559 ui_testing: bool = (false, parse_bool, [UNTRACKED],
1560 "emit compiler diagnostics in a form suitable for UI testing (default: no)"),
1561 uninit_const_chunk_threshold: usize = (16, parse_number, [TRACKED],
1562 "allow generating const initializers with mixed init/uninit chunks, \
1563 and set the maximum number of chunks for which this is allowed (default: 16)"),
1564 unleash_the_miri_inside_of_you: bool = (false, parse_bool, [TRACKED],
1565 "take the brakes off const evaluation. NOTE: this is unsound (default: no)"),
1566 unpretty: Option<String> = (None, parse_unpretty, [UNTRACKED],
1567 "present the input source, unstable (and less-pretty) variants;
1568 `normal`, `identified`,
1569 `expanded`, `expanded,identified`,
1570 `expanded,hygiene` (with internal representations),
1571 `ast-tree` (raw AST before expansion),
1572 `ast-tree,expanded` (raw AST after expansion),
1573 `hir` (the HIR), `hir,identified`,
1574 `hir,typed` (HIR with types for each node),
1575 `hir-tree` (dump the raw HIR),
1576 `mir` (the MIR), or `mir-cfg` (graphviz formatted MIR)"),
1577 unsound_mir_opts: bool = (false, parse_bool, [TRACKED],
1578 "enable unsound and buggy MIR optimizations (default: no)"),
1579 unstable_options: bool = (false, parse_bool, [UNTRACKED],
1580 "adds unstable command line options to rustc interface (default: no)"),
1581 use_ctors_section: Option<bool> = (None, parse_opt_bool, [TRACKED],
1582 "use legacy .ctors section for initializers rather than .init_array"),
1583 validate_mir: bool = (false, parse_bool, [UNTRACKED],
1584 "validate MIR after each transformation"),
1585 verbose: bool = (false, parse_bool, [UNTRACKED],
1586 "in general, enable more debug printouts (default: no)"),
1587 verify_llvm_ir: bool = (false, parse_bool, [TRACKED],
1588 "verify LLVM IR (default: no)"),
1589 wasi_exec_model: Option<WasiExecModel> = (None, parse_wasi_exec_model, [TRACKED],
1590 "whether to build a wasi command or reactor"),
1592 // This list is in alphabetical order.
1594 // If you add a new option, please update:
1595 // - compiler/rustc_interface/src/tests.rs
1598 #[derive(Clone, Hash, PartialEq, Eq, Debug)]
1599 pub enum WasiExecModel {
1604 #[derive(Clone, Copy, Hash)]