Rollup merge of #118081 - nnethercote:rustc_ty_utils, r=compiler-errors

`rustc_ty_utils` cleanups

Minor improvements I found while looking at this code.

r? ``@lcnr``

compiler/rustc_ty_utils/src/abi.rs

@@ -16,7 +16,7 @@ use rustc_target::spec::abi::Abi as SpecAbi;
 
 use std::iter;
 
-pub fn provide(providers: &mut Providers) {
+pub(crate) fn provide(providers: &mut Providers) {
     *providers = Providers { fn_abi_of_fn_ptr, fn_abi_of_instance, ..*providers };
 }
 

compiler/rustc_ty_utils/src/assoc.rs

@@ -8,7 +8,7 @@ use rustc_middle::query::Providers;
 use rustc_middle::ty::{self, GenericArgs, ImplTraitInTraitData, Ty, TyCtxt};
 use rustc_span::symbol::kw;
 
-pub fn provide(providers: &mut Providers) {
+pub(crate) fn provide(providers: &mut Providers) {
     *providers = Providers {
         associated_item,
         associated_item_def_ids,

compiler/rustc_ty_utils/src/consts.rs

@@ -17,7 +17,7 @@ use crate::errors::{GenericConstantTooComplex, GenericConstantTooComplexSub};
 
 /// Destructures array, ADT or tuple constants into the constants
 /// of their fields.
-pub(crate) fn destructure_const<'tcx>(
+fn destructure_const<'tcx>(
     tcx: TyCtxt<'tcx>,
     const_: ty::Const<'tcx>,
 ) -> ty::DestructuredConst<'tcx> {
@@ -396,7 +396,7 @@ impl<'a, 'tcx> visit::Visitor<'a, 'tcx> for IsThirPolymorphic<'a, 'tcx> {
 }
 
 /// Builds an abstract const, do not use this directly, but use `AbstractConst::new` instead.
-pub fn thir_abstract_const(
+fn thir_abstract_const(
     tcx: TyCtxt<'_>,
     def: LocalDefId,
 ) -> Result<Option<ty::EarlyBinder<ty::Const<'_>>>, ErrorGuaranteed> {
@@ -428,6 +428,6 @@ pub fn thir_abstract_const(
     Ok(Some(ty::EarlyBinder::bind(recurse_build(tcx, body, body_id, root_span)?)))
 }
 
-pub fn provide(providers: &mut Providers) {
+pub(crate) fn provide(providers: &mut Providers) {
     *providers = Providers { destructure_const, thir_abstract_const, ..*providers };
 }

compiler/rustc_ty_utils/src/implied_bounds.rs

@@ -7,7 +7,7 @@ use rustc_middle::ty::{self, Ty, TyCtxt};
 use rustc_span::Span;
 use std::iter;
 
-pub fn provide(providers: &mut Providers) {
+pub(crate) fn provide(providers: &mut Providers) {
     *providers = Providers {
         assumed_wf_types,
         assumed_wf_types_for_rpitit: |tcx, def_id| {

compiler/rustc_ty_utils/src/instance.rs

@@ -328,6 +328,6 @@ fn resolve_associated_item<'tcx>(
     })
 }
 
-pub fn provide(providers: &mut Providers) {
+pub(crate) fn provide(providers: &mut Providers) {
     *providers = Providers { resolve_instance, ..*providers };
 }

compiler/rustc_ty_utils/src/layout.rs

@@ -24,7 +24,7 @@ use crate::errors::{
 };
 use crate::layout_sanity_check::sanity_check_layout;
 
-pub fn provide(providers: &mut Providers) {
+pub(crate) fn provide(providers: &mut Providers) {
     *providers = Providers { layout_of, ..*providers };
 }
 
@@ -65,7 +65,11 @@ fn layout_of<'tcx>(
     let layout = layout_of_uncached(&cx, ty)?;
     let layout = TyAndLayout { ty, layout };
 
-    record_layout_for_printing(&cx, layout);
+    // If we are running with `-Zprint-type-sizes`, maybe record layouts
+    // for dumping later.
+    if cx.tcx.sess.opts.unstable_opts.print_type_sizes {
+        record_layout_for_printing(&cx, layout);
+    }
 
     sanity_check_layout(&cx, &layout);
 
@@ -911,21 +915,7 @@ fn coroutine_layout<'tcx>(
     Ok(layout)
 }
 
-/// This is invoked by the `layout_of` query to record the final
-/// layout of each type.
-#[inline(always)]
 fn record_layout_for_printing<'tcx>(cx: &LayoutCx<'tcx, TyCtxt<'tcx>>, layout: TyAndLayout<'tcx>) {
-    // If we are running with `-Zprint-type-sizes`, maybe record layouts
-    // for dumping later.
-    if cx.tcx.sess.opts.unstable_opts.print_type_sizes {
-        record_layout_for_printing_outlined(cx, layout)
-    }
-}
-
-fn record_layout_for_printing_outlined<'tcx>(
-    cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,
-    layout: TyAndLayout<'tcx>,
-) {
     // Ignore layouts that are done with non-empty environments or
     // non-monomorphic layouts, as the user only wants to see the stuff
     // resulting from the final codegen session.

compiler/rustc_ty_utils/src/lib.rs

@@ -10,11 +10,11 @@
 #![allow(internal_features)]
 #![feature(assert_matches)]
 #![feature(associated_type_defaults)]
+#![feature(box_patterns)]
+#![feature(if_let_guard)]
 #![feature(iterator_try_collect)]
 #![feature(let_chains)]
-#![feature(if_let_guard)]
 #![feature(never_type)]
-#![feature(box_patterns)]
 #![recursion_limit = "256"]
 #![deny(rustc::untranslatable_diagnostic)]
 #![deny(rustc::diagnostic_outside_of_impl)]
@@ -34,13 +34,13 @@ mod common_traits;
 mod consts;
 mod errors;
 mod implied_bounds;
-pub mod instance;
+mod instance;
 mod layout;
 mod layout_sanity_check;
 mod needs_drop;
 mod opaque_types;
-pub mod representability;
-pub mod sig_types;
+mod representability;
+mod sig_types;
 mod structural_match;
 mod ty;
 

compiler/rustc_ty_utils/src/representability.rs

@@ -6,7 +6,7 @@ use rustc_middle::query::Providers;
 use rustc_middle::ty::{self, Representability, Ty, TyCtxt};
 use rustc_span::def_id::LocalDefId;
 
-pub fn provide(providers: &mut Providers) {
+pub(crate) fn provide(providers: &mut Providers) {
     *providers =
         Providers { representability, representability_adt_ty, params_in_repr, ..*providers };
 }

compiler/rustc_ty_utils/src/sig_types.rs

@@ -8,7 +8,7 @@ use rustc_middle::ty::TyCtxt;
 use rustc_span::Span;
 use rustc_type_ir::visit::TypeVisitable;
 
-pub trait SpannedTypeVisitor<'tcx> {
+pub(crate) trait SpannedTypeVisitor<'tcx> {
     type BreakTy = !;
     fn visit(
         &mut self,
@@ -17,7 +17,7 @@ pub trait SpannedTypeVisitor<'tcx> {
     ) -> ControlFlow<Self::BreakTy>;
 }
 
-pub fn walk_types<'tcx, V: SpannedTypeVisitor<'tcx>>(
+pub(crate) fn walk_types<'tcx, V: SpannedTypeVisitor<'tcx>>(
     tcx: TyCtxt<'tcx>,
     item: LocalDefId,
     visitor: &mut V,

compiler/rustc_ty_utils/src/structural_match.rs

@@ -39,6 +39,6 @@ fn has_structural_eq_impls<'tcx>(tcx: TyCtxt<'tcx>, adt_ty: Ty<'tcx>) -> bool {
     ocx.select_all_or_error().is_empty()
 }
 
-pub fn provide(providers: &mut Providers) {
+pub(crate) fn provide(providers: &mut Providers) {
     providers.has_structural_eq_impls = has_structural_eq_impls;
 }

compiler/rustc_ty_utils/src/ty.rs

@@ -351,7 +351,7 @@ fn unsizing_params_for_adt<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId) -> BitSet<u32
     unsizing_params
 }
 
-pub fn provide(providers: &mut Providers) {
+pub(crate) fn provide(providers: &mut Providers) {
     *providers = Providers {
         asyncness,
         adt_sized_constraint,