Auto merge of #88326 - eddyb:inline-ty-layout-methods, r=oli-obk

`#[inline]` non-generic `pub fn`s in `rustc_target::abi` and `ty::layout`.

Mostly doing this as a perf curiosity, having spotted that `#[inline]` usage is a bit spotty.

compiler/rustc_middle/src/ty/layout.rs

@@ -42,6 +42,7 @@ pub trait IntegerExt {
 }
 
 impl IntegerExt for Integer {
+    #[inline]
     fn to_ty<'tcx>(&self, tcx: TyCtxt<'tcx>, signed: bool) -> Ty<'tcx> {
         match (*self, signed) {
             (I8, false) => tcx.types.u8,
@@ -149,6 +150,7 @@ pub trait PrimitiveExt {
 }
 
 impl PrimitiveExt for Primitive {
+    #[inline]
     fn to_ty<'tcx>(&self, tcx: TyCtxt<'tcx>) -> Ty<'tcx> {
         match *self {
             Int(i, signed) => i.to_ty(tcx, signed),
@@ -160,6 +162,7 @@ impl PrimitiveExt for Primitive {
 
     /// Return an *integer* type matching this primitive.
     /// Useful in particular when dealing with enum discriminants.
+    #[inline]
     fn to_int_ty(&self, tcx: TyCtxt<'tcx>) -> Ty<'tcx> {
         match *self {
             Int(i, signed) => i.to_ty(tcx, signed),
@@ -2018,12 +2021,14 @@ pub trait HasParamEnv<'tcx> {
 }
 
 impl<'tcx> HasDataLayout for TyCtxt<'tcx> {
+    #[inline]
     fn data_layout(&self) -> &TargetDataLayout {
         &self.data_layout
     }
 }
 
 impl<'tcx> HasTyCtxt<'tcx> for TyCtxt<'tcx> {
+    #[inline]
     fn tcx(&self) -> TyCtxt<'tcx> {
         *self
     }
@@ -2055,6 +2060,7 @@ impl<'tcx> LayoutOf for LayoutCx<'tcx, TyCtxt<'tcx>> {
 
     /// Computes the layout of a type. Note that this implicitly
     /// executes in "reveal all" mode, and will normalize the input type.
+    #[inline]
     fn layout_of(&self, ty: Ty<'tcx>) -> Self::TyAndLayout {
         self.tcx.layout_of(self.param_env.and(ty))
     }
@@ -2066,6 +2072,7 @@ impl LayoutOf for LayoutCx<'tcx, ty::query::TyCtxtAt<'tcx>> {
 
     /// Computes the layout of a type. Note that this implicitly
     /// executes in "reveal all" mode, and will normalize the input type.
+    #[inline]
     fn layout_of(&self, ty: Ty<'tcx>) -> Self::TyAndLayout {
         self.tcx.layout_of(self.param_env.and(ty))
     }
@@ -2416,6 +2423,7 @@ where
 }
 
 impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for LayoutError<'tcx> {
+    #[inline]
     fn hash_stable(&self, hcx: &mut StableHashingContext<'a>, hasher: &mut StableHasher) {
         use crate::ty::layout::LayoutError::*;
         mem::discriminant(self).hash_stable(hcx, hasher);
@@ -2606,6 +2614,7 @@ where
 /// compiled with `-Cpanic=unwind` and referenced from another crate compiled
 /// with `-Cpanic=abort` will look like they can't unwind when in fact they
 /// might (from a foreign exception or similar).
+#[inline]
 pub fn fn_can_unwind(
     tcx: TyCtxt<'tcx>,
     codegen_fn_attr_flags: CodegenFnAttrFlags,
@@ -2681,6 +2690,7 @@ pub fn fn_can_unwind(
     }
 }
 
+#[inline]
 pub fn conv_from_spec_abi(tcx: TyCtxt<'_>, abi: SpecAbi) -> Conv {
     use rustc_target::spec::abi::Abi::*;
     match tcx.sess.target.adjust_abi(abi) {

compiler/rustc_target/src/abi/mod.rs

@@ -194,6 +194,7 @@ impl TargetDataLayout {
     /// to represent object size in bits. It would need to be 1 << 61 to account for this, but is
     /// currently conservatively bounded to 1 << 47 as that is enough to cover the current usable
     /// address space on 64-bit ARMv8 and x86_64.
+    #[inline]
     pub fn obj_size_bound(&self) -> u64 {
         match self.pointer_size.bits() {
             16 => 1 << 15,
@@ -203,6 +204,7 @@ impl TargetDataLayout {
         }
     }
 
+    #[inline]
     pub fn ptr_sized_integer(&self) -> Integer {
         match self.pointer_size.bits() {
             16 => I16,
@@ -212,6 +214,7 @@ impl TargetDataLayout {
         }
     }
 
+    #[inline]
     pub fn vector_align(&self, vec_size: Size) -> AbiAndPrefAlign {
         for &(size, align) in &self.vector_align {
             if size == vec_size {
@@ -562,14 +565,17 @@ pub struct AbiAndPrefAlign {
 }
 
 impl AbiAndPrefAlign {
+    #[inline]
     pub fn new(align: Align) -> AbiAndPrefAlign {
         AbiAndPrefAlign { abi: align, pref: align }
     }
 
+    #[inline]
     pub fn min(self, other: AbiAndPrefAlign) -> AbiAndPrefAlign {
         AbiAndPrefAlign { abi: self.abi.min(other.abi), pref: self.pref.min(other.pref) }
     }
 
+    #[inline]
     pub fn max(self, other: AbiAndPrefAlign) -> AbiAndPrefAlign {
         AbiAndPrefAlign { abi: self.abi.max(other.abi), pref: self.pref.max(other.pref) }
     }
@@ -586,6 +592,7 @@ pub enum Integer {
 }
 
 impl Integer {
+    #[inline]
     pub fn size(self) -> Size {
         match self {
             I8 => Size::from_bytes(1),
@@ -609,6 +616,7 @@ impl Integer {
     }
 
     /// Finds the smallest Integer type which can represent the signed value.
+    #[inline]
     pub fn fit_signed(x: i128) -> Integer {
         match x {
             -0x0000_0000_0000_0080..=0x0000_0000_0000_007f => I8,
@@ -620,6 +628,7 @@ impl Integer {
     }
 
     /// Finds the smallest Integer type which can represent the unsigned value.
+    #[inline]
     pub fn fit_unsigned(x: u128) -> Integer {
         match x {
             0..=0x0000_0000_0000_00ff => I8,
@@ -655,6 +664,9 @@ impl Integer {
         I8
     }
 
+    // FIXME(eddyb) consolidate this and other methods that find the appropriate
+    // `Integer` given some requirements.
+    #[inline]
     fn from_size(size: Size) -> Result<Self, String> {
         match size.bits() {
             8 => Ok(Integer::I8),
@@ -706,10 +718,14 @@ impl Primitive {
         }
     }
 
+    // FIXME(eddyb) remove, it's trivial thanks to `matches!`.
+    #[inline]
     pub fn is_float(self) -> bool {
         matches!(self, F32 | F64)
     }
 
+    // FIXME(eddyb) remove, it's completely unused.
+    #[inline]
     pub fn is_int(self) -> bool {
         matches!(self, Int(..))
     }
@@ -786,6 +802,7 @@ pub struct Scalar {
 }
 
 impl Scalar {
+    #[inline]
     pub fn is_bool(&self) -> bool {
         matches!(self.value, Int(I8, false))
             && matches!(self.valid_range, WrappingRange { start: 0, end: 1 })
@@ -852,6 +869,7 @@ pub enum FieldsShape {
 }
 
 impl FieldsShape {
+    #[inline]
     pub fn count(&self) -> usize {
         match *self {
             FieldsShape::Primitive => 0,
@@ -861,6 +879,7 @@ impl FieldsShape {
         }
     }
 
+    #[inline]
     pub fn offset(&self, i: usize) -> Size {
         match *self {
             FieldsShape::Primitive => {
@@ -884,6 +903,7 @@ impl FieldsShape {
         }
     }
 
+    #[inline]
     pub fn memory_index(&self, i: usize) -> usize {
         match *self {
             FieldsShape::Primitive => {
@@ -967,6 +987,7 @@ impl Abi {
     }
 
     /// Returns `true` if this is a single signed integer scalar
+    #[inline]
     pub fn is_signed(&self) -> bool {
         match *self {
             Abi::Scalar(ref scal) => match scal.value {