LlvmCodegenBackend in rustc_codegen_llvm - Rust
Description: API documentation for the Rust `LlvmCodegenBackend` struct in crate `rustc_codegen_llvm`.

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## LlvmCodegenBackend

# Struct LlvmCodegenBackend

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    pub struct LlvmCodegenBackend(pub(crate) ());

## Tuple Fields§

§`0: ()`

## Implementations§

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### impl LlvmCodegenBackend

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#### pub fn new() -> Box<dyn CodegenBackend>

## Trait Implementations§

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### impl Clone for LlvmCodegenBackend

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#### fn clone(&self) -> LlvmCodegenBackend

Returns a duplicate of the value. Read more
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#### fn clone_from(&mut self, source: &Self)

Performs copy-assignment from `source`. Read more
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### impl CodegenBackend for LlvmCodegenBackend

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#### fn name(&self) -> &'static str

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#### fn init(&self, sess: &Session)

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#### fn provide(&self, providers: &mut Providers)

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#### fn print(&self, req: &PrintRequest, out: &mut String, sess: &Session)

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#### fn print_passes(&self)

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#### fn print_version(&self)

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#### fn has_zstd(&self) -> bool

Value printed by `--print=backend-has-zstd`. Read more
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#### fn has_mnemonic(&self, sess: &Session, mnemonic: &str) -> bool

Value printed by `--print=backend-has-mnemonic:...`. Read more
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#### fn target_config(&self, sess: &Session) -> TargetConfig

Collect target-specific options that should be set in `cfg(...)`, including `target_feature` and support for unstable float types.
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#### fn replaced_intrinsics(&self) -> Vec<Symbol>

Returns a list of all intrinsics that this backend definitely replaces, which means their fallback bodies do not need to be monomorphized.
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#### fn target_cpu(&self, sess: &Session) -> String

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#### fn codegen_crate<'tcx>(&self, tcx: TyCtxt<'tcx>) -> Box<dyn Any>

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#### fn join_codegen( &self, ongoing_codegen: Box<dyn Any>, sess: &Session, outputs: &OutputFilenames, crate_info: &CrateInfo, ) -> (CompiledModules, FxIndexMap<WorkProductId, WorkProduct>)

This is called on the returned `Box<dyn Any>` from `codegen_crate` Read more
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#### fn print_pass_timings(&self)

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#### fn print_statistics(&self)

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#### fn print_statistics_json(&self) -> String

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#### fn link( &self, sess: &Session, compiled_modules: CompiledModules, crate_info: CrateInfo, metadata: EncodedMetadata, outputs: &OutputFilenames, )

This is called on the returned [`CompiledModules`] from `join_codegen`.
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#### fn supported_crate_types(&self, _sess: &Session) -> Vec<CrateType>

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#### fn thin_lto_supported(&self) -> bool

Is ThinLTO supported by this backend?
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#### fn metadata_loader( &self, ) -> Box<dyn MetadataLoader + Send + Sync + DynSend + DynSync>

The metadata loader used to load rlib and dylib metadata. Read more
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### impl ExtraBackendMethods for LlvmCodegenBackend

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#### fn codegen_allocator<'tcx>( &self, tcx: TyCtxt<'tcx>, module_name: &str, methods: &[AllocatorMethod], ) -> ModuleLlvm

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#### fn compile_codegen_unit( &self, tcx: TyCtxt<'_>, cgu_name: Symbol, ) -> (ModuleCodegen<ModuleLlvm>, u64)

This generates the codegen unit and returns it along with a `u64` giving an estimate of the unit’s processing cost.
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#### fn supports_parallel(&self) -> bool

Returns `true` if this backend can be safely called from multiple threads. Read more
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### impl WriteBackendMethods for LlvmCodegenBackend

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#### type Module = ModuleLlvm

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#### type ModuleBuffer = ModuleBuffer

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#### type TargetMachine = OwnedTargetMachine

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#### type ThinData = ThinData

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#### fn thread_profiler() -> Box<dyn Any>

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#### fn target_machine_factory( &self, sess: &Session, optlvl: OptLevel, target_features: &[String], ) -> TargetMachineFactoryFn<Self>

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#### fn optimize_and_codegen_fat_lto( sess: &Session, cgcx: &CodegenContext, shared_emitter: &SharedEmitter, tm_factory: TargetMachineFactoryFn<LlvmCodegenBackend>, exported_symbols_for_lto: &[String], each_linked_rlib_for_lto: &[PathBuf], modules: Vec<FatLtoInput<Self>>, ) -> CompiledModule

Performs fat LTO by merging all modules into a single one, running autodiff if necessary and running any further optimizations
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#### fn run_thin_lto( cgcx: &CodegenContext, prof: &SelfProfilerRef, dcx: DiagCtxtHandle<'_>, exported_symbols_for_lto: &[String], each_linked_rlib_for_lto: &[PathBuf], modules: Vec<ThinLtoInput<Self>>, ) -> (Vec<ThinModule<Self>>, Vec<WorkProduct>)

Performs thin LTO by performing necessary global analysis and returning two lists, one of the modules that need optimization and another for modules that can simply be copied over from the incr. comp. cache.
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#### fn optimize( cgcx: &CodegenContext, prof: &SelfProfilerRef, shared_emitter: &SharedEmitter, module: &mut ModuleCodegen<Self::Module>, config: &ModuleConfig, )

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#### fn optimize_and_codegen_thin( cgcx: &CodegenContext, prof: &SelfProfilerRef, shared_emitter: &SharedEmitter, tm_factory: TargetMachineFactoryFn<LlvmCodegenBackend>, thin: ThinModule<Self>, ) -> CompiledModule

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#### fn codegen( cgcx: &CodegenContext, prof: &SelfProfilerRef, shared_emitter: &SharedEmitter, module: ModuleCodegen<Self::Module>, config: &ModuleConfig, ) -> CompiledModule

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#### fn serialize_module(module: Self::Module, is_thin: bool) -> Self::ModuleBuffer

## Auto Trait Implementations§

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### impl DynSend for LlvmCodegenBackend

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### impl DynSync for LlvmCodegenBackend

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### impl Freeze for LlvmCodegenBackend

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### impl RefUnwindSafe for LlvmCodegenBackend

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### impl Send for LlvmCodegenBackend

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### impl Sync for LlvmCodegenBackend

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### impl Unpin for LlvmCodegenBackend

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### impl UnsafeUnpin for LlvmCodegenBackend

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### impl UnwindSafe for LlvmCodegenBackend

## Blanket Implementations§

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### impl<T> Aligned for T

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#### const ALIGN: Alignment

Alignment of `Self`.
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### impl<T> Any for T
where T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
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### impl<T> Borrow<T> for T
where T: ?Sized,

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#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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### impl<T> BorrowMut<T> for T
where T: ?Sized,

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#### fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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### impl<T> CloneToUninit for T
where T: Clone,

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#### unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (`clone_to_uninit`)
Performs copy-assignment from `self` to `dest`. Read more
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### impl<T, R> CollectAndApply<T, R> for T

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#### fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to `f(&iter.collect::<Vec<_>>())`.

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#### type Output = R

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### impl<T> DynClone for T
where T: Clone,

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#### fn __clone_box(&self, _: Private) -> *mut ()

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### impl<T> From<T> for T

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#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T> Instrument for T

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#### fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided `Span`, returning an `Instrumented` wrapper. Read more
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#### fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more
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### impl<T, U> Into<U> for T
where U: From<T>,

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#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

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### impl<T> IntoEither for T

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#### fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left` is `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
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#### fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left(&self)` returns `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
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### impl<K> IntoQueryKey<K> for K

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#### fn into_query_key(self) -> K

Argument conversion from `Self` to `K`. This should always be a very cheap conversion, e.g. `LocalDefId::to_def_id`.
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### impl<T> MaybeResult<T> for T

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#### type Error = !

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#### fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

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#### fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

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### impl<T> Pointable for T

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#### const ALIGN: usize

The alignment of pointer.
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#### type Init = T

The type for initializers.
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#### unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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#### unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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#### unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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#### unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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### impl<T> Same for T

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#### type Output = T

Should always be `Self`
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### impl<T> ToOwned for T
where T: Clone,

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#### type Owned = T

The resulting type after obtaining ownership.
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#### fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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#### fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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### impl<T, U> TryFrom<U> for T
where U: Into<T>,

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#### type Error = Infallible

The type returned in the event of a conversion error.
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#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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### impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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#### type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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### impl<I, T, U> Upcast<I, U> for T
where U: UpcastFrom<I, T>,

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#### fn upcast(self, interner: I) -> U

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### impl<I, T> UpcastFrom<I, T> for T

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#### fn upcast_from(from: T, _tcx: I) -> T

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### impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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#### fn vzip(self) -> V

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### impl<T> WithSubscriber for T

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#### fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
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#### fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
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### impl<T> ErasedDestructor for T
where T: 'static,

## Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain `repr(...)` attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

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