Miscellaneous inlining improvements

compiler/rustc_codegen_llvm/src/builder.rs

@@ -69,6 +69,7 @@ impl abi::HasDataLayout for Builder<'_, '_, '_> {
 }
 
 impl ty::layout::HasTyCtxt<'tcx> for Builder<'_, '_, 'tcx> {
+    #[inline]
     fn tcx(&self) -> TyCtxt<'tcx> {
         self.cx.tcx
     }
@@ -81,6 +82,7 @@ impl ty::layout::HasParamEnv<'tcx> for Builder<'_, '_, 'tcx> {
 }
 
 impl HasTargetSpec for Builder<'_, '_, 'tcx> {
+    #[inline]
     fn target_spec(&self) -> &Target {
         &self.cx.target_spec()
     }
@@ -98,6 +100,7 @@ impl abi::LayoutOf for Builder<'_, '_, 'tcx> {
 impl Deref for Builder<'_, 'll, 'tcx> {
     type Target = CodegenCx<'ll, 'tcx>;
 
+    #[inline]
     fn deref(&self) -> &Self::Target {
         self.cx
     }

compiler/rustc_codegen_llvm/src/context.rs

@@ -765,18 +765,21 @@ impl<'b, 'tcx> CodegenCx<'b, 'tcx> {
 }
 
 impl HasDataLayout for CodegenCx<'ll, 'tcx> {
+    #[inline]
     fn data_layout(&self) -> &TargetDataLayout {
         &self.tcx.data_layout
     }
 }
 
 impl HasTargetSpec for CodegenCx<'ll, 'tcx> {
+    #[inline]
     fn target_spec(&self) -> &Target {
         &self.tcx.sess.target
     }
 }
 
 impl ty::layout::HasTyCtxt<'tcx> for CodegenCx<'ll, 'tcx> {
+    #[inline]
     fn tcx(&self) -> TyCtxt<'tcx> {
         self.tcx
     }

compiler/rustc_data_structures/src/tagged_ptr.rs

@@ -90,9 +90,11 @@ pub unsafe trait Tag: Copy {
 
 unsafe impl<T> Pointer for Box<T> {
     const BITS: usize = std::mem::align_of::<T>().trailing_zeros() as usize;
+    #[inline]
     fn into_usize(self) -> usize {
         Box::into_raw(self) as usize
     }
+    #[inline]
     unsafe fn from_usize(ptr: usize) -> Self {
         Box::from_raw(ptr as *mut T)
     }
@@ -104,9 +106,11 @@ unsafe impl<T> Pointer for Box<T> {
 
 unsafe impl<T> Pointer for Rc<T> {
     const BITS: usize = std::mem::align_of::<T>().trailing_zeros() as usize;
+    #[inline]
     fn into_usize(self) -> usize {
         Rc::into_raw(self) as usize
     }
+    #[inline]
     unsafe fn from_usize(ptr: usize) -> Self {
         Rc::from_raw(ptr as *const T)
     }
@@ -118,9 +122,11 @@ unsafe impl<T> Pointer for Rc<T> {
 
 unsafe impl<T> Pointer for Arc<T> {
     const BITS: usize = std::mem::align_of::<T>().trailing_zeros() as usize;
+    #[inline]
     fn into_usize(self) -> usize {
         Arc::into_raw(self) as usize
     }
+    #[inline]
     unsafe fn from_usize(ptr: usize) -> Self {
         Arc::from_raw(ptr as *const T)
     }
@@ -132,9 +138,11 @@ unsafe impl<T> Pointer for Arc<T> {
 
 unsafe impl<'a, T: 'a> Pointer for &'a T {
     const BITS: usize = std::mem::align_of::<T>().trailing_zeros() as usize;
+    #[inline]
     fn into_usize(self) -> usize {
         self as *const T as usize
     }
+    #[inline]
     unsafe fn from_usize(ptr: usize) -> Self {
         &*(ptr as *const T)
     }
@@ -145,9 +153,11 @@ unsafe impl<'a, T: 'a> Pointer for &'a T {
 
 unsafe impl<'a, T: 'a> Pointer for &'a mut T {
     const BITS: usize = std::mem::align_of::<T>().trailing_zeros() as usize;
+    #[inline]
     fn into_usize(self) -> usize {
         self as *mut T as usize
     }
+    #[inline]
     unsafe fn from_usize(ptr: usize) -> Self {
         &mut *(ptr as *mut T)
     }

compiler/rustc_errors/src/lib.rs

@@ -715,6 +715,7 @@ impl Handler {
         self.inner.borrow_mut().bug(msg)
     }
 
+    #[inline]
     pub fn err_count(&self) -> usize {
         self.inner.borrow().err_count()
     }
@@ -924,6 +925,7 @@ impl HandlerInner {
         }
     }
 
+    #[inline]
     fn err_count(&self) -> usize {
         self.err_count + self.stashed_diagnostics.len()
     }

compiler/rustc_hir/src/definitions.rs

@@ -305,6 +305,7 @@ impl Definitions {
         self.table.index_to_key.len()
     }
 
+    #[inline]
     pub fn def_key(&self, id: LocalDefId) -> DefKey {
         self.table.def_key(id.local_def_index)
     }

compiler/rustc_hir/src/hir.rs

@@ -2485,6 +2485,7 @@ pub enum FnRetTy<'hir> {
 }
 
 impl FnRetTy<'_> {
+    #[inline]
     pub fn span(&self) -> Span {
         match *self {
             Self::DefaultReturn(span) => span,

compiler/rustc_middle/src/infer/canonical.rs

@@ -294,6 +294,7 @@ TrivialTypeFoldableImpls! {
 }
 
 impl<'tcx> CanonicalVarValues<'tcx> {
+    #[inline]
     pub fn len(&self) -> usize {
         self.var_values.len()
     }

compiler/rustc_middle/src/mir/interpret/mod.rs

@@ -246,6 +246,7 @@ pub struct AllocDecodingState {
 }
 
 impl AllocDecodingState {
+    #[inline]
     pub fn new_decoding_session(&self) -> AllocDecodingSession<'_> {
         static DECODER_SESSION_ID: AtomicU32 = AtomicU32::new(0);
         let counter = DECODER_SESSION_ID.fetch_add(1, Ordering::SeqCst);

compiler/rustc_middle/src/mir/mod.rs

@@ -1249,10 +1249,12 @@ impl<'tcx> BasicBlockData<'tcx> {
     ///
     /// Terminator may not be None after construction of the basic block is complete. This accessor
     /// provides a convenience way to reach the terminator.
+    #[inline]
     pub fn terminator(&self) -> &Terminator<'tcx> {
         self.terminator.as_ref().expect("invalid terminator state")
     }
 
+    #[inline]
     pub fn terminator_mut(&mut self) -> &mut Terminator<'tcx> {
         self.terminator.as_mut().expect("invalid terminator state")
     }
@@ -1870,13 +1872,15 @@ impl<'tcx> PlaceRef<'tcx> {
 
     /// If this place represents a local variable like `_X` with no
     /// projections, return `Some(_X)`.
+    #[inline]
     pub fn as_local(&self) -> Option<Local> {
         match *self {
             PlaceRef { local, projection: [] } => Some(local),
             _ => None,
         }
     }
 
+    #[inline]
     pub fn last_projection(&self) -> Option<(PlaceRef<'tcx>, PlaceElem<'tcx>)> {
         if let &[ref proj_base @ .., elem] = self.projection {
             Some((PlaceRef { local: self.local, projection: proj_base }, elem))
@@ -2464,12 +2468,14 @@ impl Constant<'tcx> {
             _ => None,
         }
     }
+    #[inline]
     pub fn ty(&self) -> Ty<'tcx> {
         self.literal.ty()
     }
 }
 
 impl From<&'tcx ty::Const<'tcx>> for ConstantKind<'tcx> {
+    #[inline]
     fn from(ct: &'tcx ty::Const<'tcx>) -> Self {
         Self::Ty(ct)
     }

compiler/rustc_middle/src/mir/mono.rs

@@ -267,6 +267,7 @@ pub enum Visibility {
 }
 
 impl<'tcx> CodegenUnit<'tcx> {
+    #[inline]
     pub fn new(name: Symbol) -> CodegenUnit<'tcx> {
         CodegenUnit { name, items: Default::default(), size_estimate: None, primary: false }
     }
@@ -311,6 +312,7 @@ impl<'tcx> CodegenUnit<'tcx> {
         self.size_estimate = Some(self.items.keys().map(|mi| mi.size_estimate(tcx)).sum());
     }
 
+    #[inline]
     pub fn size_estimate(&self) -> usize {
         // Should only be called if `estimate_size` has previously been called.
         self.size_estimate.expect("estimate_size must be called before getting a size_estimate")

compiler/rustc_middle/src/ty/generics.rs

@@ -93,6 +93,7 @@ pub struct Generics {
 }
 
 impl<'tcx> Generics {
+    #[inline]
     pub fn count(&self) -> usize {
         self.parent_count + self.params.len()
     }

compiler/rustc_middle/src/ty/list.rs

@@ -37,9 +37,11 @@ pub struct List<T> {
 
 unsafe impl<'a, T: 'a> rustc_data_structures::tagged_ptr::Pointer for &'a List<T> {
     const BITS: usize = std::mem::align_of::<usize>().trailing_zeros() as usize;
+    #[inline]
     fn into_usize(self) -> usize {
         self as *const List<T> as usize
     }
+    #[inline]
     unsafe fn from_usize(ptr: usize) -> Self {
         &*(ptr as *const List<T>)
     }

compiler/rustc_middle/src/ty/mod.rs

@@ -1097,12 +1097,14 @@ pub struct ParamEnv<'tcx> {
 
 unsafe impl rustc_data_structures::tagged_ptr::Tag for traits::Reveal {
     const BITS: usize = 1;
+    #[inline]
     fn into_usize(self) -> usize {
         match self {
             traits::Reveal::UserFacing => 0,
             traits::Reveal::All => 1,
         }
     }
+    #[inline]
     unsafe fn from_usize(ptr: usize) -> Self {
         match ptr {
             0 => traits::Reveal::UserFacing,
@@ -1200,6 +1202,7 @@ impl<'tcx> ParamEnv<'tcx> {
     }
 
     /// Returns this same environment but with no caller bounds.
+    #[inline]
     pub fn without_caller_bounds(self) -> Self {
         Self::new(List::empty(), self.reveal())
     }

compiler/rustc_session/src/session.rs

@@ -452,6 +452,7 @@ impl Session {
     pub fn emit_err<'a>(&'a self, err: impl SessionDiagnostic<'a>) {
         err.into_diagnostic(self).emit()
     }
+    #[inline]
     pub fn err_count(&self) -> usize {
         self.diagnostic().err_count()
     }
@@ -524,6 +525,7 @@ impl Session {
         self.diagnostic().struct_note_without_error(msg)
     }
 
+    #[inline]
     pub fn diagnostic(&self) -> &rustc_errors::Handler {
         &self.parse_sess.span_diagnostic
     }

compiler/rustc_span/src/def_id.rs

@@ -20,10 +20,12 @@ rustc_index::newtype_index! {
 pub const LOCAL_CRATE: CrateNum = CrateNum::from_u32(0);
 
 impl CrateNum {
+    #[inline]
     pub fn new(x: usize) -> CrateNum {
         CrateNum::from_usize(x)
     }
 
+    #[inline]
     pub fn as_def_id(&self) -> DefId {
         DefId { krate: *self, index: CRATE_DEF_INDEX }
     }

compiler/rustc_target/src/abi/mod.rs

@@ -222,6 +222,7 @@ pub trait HasDataLayout {
 }
 
 impl HasDataLayout for TargetDataLayout {
+    #[inline]
     fn data_layout(&self) -> &TargetDataLayout {
         self
     }
@@ -862,6 +863,7 @@ pub enum Abi {
 
 impl Abi {
     /// Returns `true` if the layout corresponds to an unsized type.
+    #[inline]
     pub fn is_unsized(&self) -> bool {
         match *self {
             Abi::Uninhabited | Abi::Scalar(_) | Abi::ScalarPair(..) | Abi::Vector { .. } => false,
@@ -881,11 +883,13 @@ impl Abi {
     }
 
     /// Returns `true` if this is an uninhabited type
+    #[inline]
     pub fn is_uninhabited(&self) -> bool {
         matches!(*self, Abi::Uninhabited)
     }
 
     /// Returns `true` is this is a scalar type
+    #[inline]
     pub fn is_scalar(&self) -> bool {
         matches!(*self, Abi::Scalar(_))
     }

compiler/rustc_target/src/spec/mod.rs

@@ -922,6 +922,7 @@ pub trait HasTargetSpec {
 }
 
 impl HasTargetSpec for Target {
+    #[inline]
     fn target_spec(&self) -> &Target {
         self
     }