Auto merge of #125711 - oli-obk:const_block_ice2, r=Nadrieril

Make `body_owned_by` return the `Body` instead of just the `BodyId` fixes #125677 Almost all `body_owned_by` callers immediately called `body`, too, so just return `Body` directly. This makes the inline-const query feeding more robust, as all calls to `body_owned_by` will now yield a body for inline consts, too. I have not yet figured out a good way to make `tcx.hir().body()` return an inline-const body, but that can be done as a follow-up
2024-11-22 06:44:35 +00:00 · 2024-05-30 08:00:11 +00:00 · 2024-05-30 08:00:11 +00:00 · d43930dab3
commit d43930dab3
parent 32a3ed229c a34c26e7ec
54 changed files with 163 additions and 162 deletions
--- a/compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs
+++ b/compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs
@ -399,8 +399,8 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
            }
        }
        let hir = self.infcx.tcx.hir();
-        if let Some(body_id) = hir.maybe_body_owned_by(self.mir_def_id()) {
-            let expr = hir.body(body_id).value;
+        if let Some(body) = hir.maybe_body_owned_by(self.mir_def_id()) {
+            let expr = body.value;
            let place = &self.move_data.move_paths[mpi].place;
            let span = place.as_local().map(|local| self.body.local_decls[local].source_info.span);
            let mut finder = ExpressionFinder {
@ -556,11 +556,10 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
        // We use the statements were the binding was initialized, and inspect the HIR to look
        // for the branching codepaths that aren't covered, to point at them.
        let map = self.infcx.tcx.hir();
-        let body_id = map.body_owned_by(self.mir_def_id());
-        let body = map.body(body_id);
+        let body = map.body_owned_by(self.mir_def_id());

        let mut visitor = ConditionVisitor { spans: &spans, name: &name, errors: vec![] };
-        visitor.visit_body(body);
+        visitor.visit_body(&body);

        let mut show_assign_sugg = false;
        let isnt_initialized = if let InitializationRequiringAction::PartialAssignment
@ -665,7 +664,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
            }

            let mut visitor = LetVisitor { decl_span, sugg_span: None };
-            visitor.visit_body(body);
+            visitor.visit_body(&body);
            if let Some(span) = visitor.sugg_span {
                self.suggest_assign_value(&mut err, moved_place, span);
            }
--- a/compiler/rustc_borrowck/src/diagnostics/mutability_errors.rs
+++ b/compiler/rustc_borrowck/src/diagnostics/mutability_errors.rs
@ -647,8 +647,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
            let hir_map = self.infcx.tcx.hir();
            let def_id = self.body.source.def_id();
            let Some(local_def_id) = def_id.as_local() else { return };
-            let Some(body_id) = hir_map.maybe_body_owned_by(local_def_id) else { return };
-            let body = self.infcx.tcx.hir().body(body_id);
+            let Some(body) = hir_map.maybe_body_owned_by(local_def_id) else { return };

            let mut v = SuggestIndexOperatorAlternativeVisitor {
                assign_span: span,
@ -656,7 +655,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
                ty,
                suggested: false,
            };
-            v.visit_body(body);
+            v.visit_body(&body);
            if !v.suggested {
                err.help(format!(
                    "to modify a `{ty}`, use `.get_mut()`, `.insert()` or the entry API",
@ -746,9 +745,8 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
        // `fn foo(&x: &i32)` -> `fn foo(&(mut x): &i32)`
        let def_id = self.body.source.def_id();
        if let Some(local_def_id) = def_id.as_local()
-            && let Some(body_id) = self.infcx.tcx.hir().maybe_body_owned_by(local_def_id)
-            && let body = self.infcx.tcx.hir().body(body_id)
-            && let Some(hir_id) = (BindingFinder { span: pat_span }).visit_body(body).break_value()
+            && let Some(body) = self.infcx.tcx.hir().maybe_body_owned_by(local_def_id)
+            && let Some(hir_id) = (BindingFinder { span: pat_span }).visit_body(&body).break_value()
            && let node = self.infcx.tcx.hir_node(hir_id)
            && let hir::Node::LetStmt(hir::LetStmt {
                pat: hir::Pat { kind: hir::PatKind::Ref(_, _), .. },
@ -867,8 +865,8 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
                }
            }
        }
-        if let Some(body_id) = hir_map.maybe_body_owned_by(self.mir_def_id())
-            && let Block(block, _) = hir_map.body(body_id).value.kind
+        if let Some(body) = hir_map.maybe_body_owned_by(self.mir_def_id())
+            && let Block(block, _) = body.value.kind
        {
            // `span` corresponds to the expression being iterated, find the `for`-loop desugared
            // expression with that span in order to identify potential fixes when encountering a
@ -1189,10 +1187,9 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
            Some((false, err_label_span, message, _)) => {
                let def_id = self.body.source.def_id();
                let hir_id = if let Some(local_def_id) = def_id.as_local()
-                    && let Some(body_id) = self.infcx.tcx.hir().maybe_body_owned_by(local_def_id)
+                    && let Some(body) = self.infcx.tcx.hir().maybe_body_owned_by(local_def_id)
                {
-                    let body = self.infcx.tcx.hir().body(body_id);
-                    BindingFinder { span: err_label_span }.visit_body(body).break_value()
+                    BindingFinder { span: err_label_span }.visit_body(&body).break_value()
                } else {
                    None
                };
--- a/compiler/rustc_borrowck/src/diagnostics/region_errors.rs
+++ b/compiler/rustc_borrowck/src/diagnostics/region_errors.rs
@ -1183,8 +1183,8 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
    #[allow(rustc::untranslatable_diagnostic)] // FIXME: make this translatable
    fn suggest_move_on_borrowing_closure(&self, diag: &mut Diag<'_>) {
        let map = self.infcx.tcx.hir();
-        let body_id = map.body_owned_by(self.mir_def_id());
-        let expr = &map.body(body_id).value.peel_blocks();
+        let body = map.body_owned_by(self.mir_def_id());
+        let expr = &body.value.peel_blocks();
        let mut closure_span = None::<rustc_span::Span>;
        match expr.kind {
            hir::ExprKind::MethodCall(.., args, _) => {
--- a/compiler/rustc_driver_impl/src/pretty.rs
+++ b/compiler/rustc_driver_impl/src/pretty.rs
@ -169,7 +169,7 @@ impl<'tcx> pprust_hir::PpAnn for HirTypedAnn<'tcx> {
                self.tcx
                    .hir()
                    .maybe_body_owned_by(expr.hir_id.owner.def_id)
-                    .map(|body_id| self.tcx.typeck_body(body_id))
+                    .map(|body_id| self.tcx.typeck_body(body_id.id()))
            });

            if let Some(typeck_results) = typeck_results {
--- a/compiler/rustc_hir/src/intravisit.rs
+++ b/compiler/rustc_hir/src/intravisit.rs
@ -299,7 +299,7 @@ pub trait Visitor<'v>: Sized {
        walk_item(self, i)
    }

-    fn visit_body(&mut self, b: &'v Body<'v>) -> Self::Result {
+    fn visit_body(&mut self, b: &Body<'v>) -> Self::Result {
        walk_body(self, b)
    }

@ -578,7 +578,7 @@ pub fn walk_item<'v, V: Visitor<'v>>(visitor: &mut V, item: &'v Item<'v>) -> V::
    V::Result::output()
 }

-pub fn walk_body<'v, V: Visitor<'v>>(visitor: &mut V, body: &'v Body<'v>) -> V::Result {
+pub fn walk_body<'v, V: Visitor<'v>>(visitor: &mut V, body: &Body<'v>) -> V::Result {
    walk_list!(visitor, visit_param, body.params);
    visitor.visit_expr(body.value)
 }
--- a/compiler/rustc_hir_analysis/src/check/region.rs
+++ b/compiler/rustc_hir_analysis/src/check/region.rs
@ -818,7 +818,7 @@ impl<'tcx> Visitor<'tcx> for RegionResolutionVisitor<'tcx> {
        resolve_block(self, b);
    }

-    fn visit_body(&mut self, body: &'tcx hir::Body<'tcx>) {
+    fn visit_body(&mut self, body: &hir::Body<'tcx>) {
        let body_id = body.id();
        let owner_id = self.tcx.hir().body_owner_def_id(body_id);

@ -896,7 +896,7 @@ pub fn region_scope_tree(tcx: TyCtxt<'_>, def_id: DefId) -> &ScopeTree {
        return tcx.region_scope_tree(typeck_root_def_id);
    }

-    let scope_tree = if let Some(body_id) = tcx.hir().maybe_body_owned_by(def_id.expect_local()) {
+    let scope_tree = if let Some(body) = tcx.hir().maybe_body_owned_by(def_id.expect_local()) {
        let mut visitor = RegionResolutionVisitor {
            tcx,
            scope_tree: ScopeTree::default(),
@ -907,9 +907,8 @@ pub fn region_scope_tree(tcx: TyCtxt<'_>, def_id: DefId) -> &ScopeTree {
            fixup_scopes: vec![],
        };

-        let body = tcx.hir().body(body_id);
        visitor.scope_tree.root_body = Some(body.value.hir_id);
-        visitor.visit_body(body);
+        visitor.visit_body(&body);
        visitor.scope_tree
    } else {
        ScopeTree::default()
--- a/compiler/rustc_hir_typeck/src/_match.rs
+++ b/compiler/rustc_hir_typeck/src/_match.rs
@ -207,10 +207,9 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
        let hir = self.tcx.hir();

        // First, check that we're actually in the tail of a function.
-        let Some(body_id) = hir.maybe_body_owned_by(self.body_id) else {
+        let Some(body) = hir.maybe_body_owned_by(self.body_id) else {
            return;
        };
-        let body = hir.body(body_id);
        let hir::ExprKind::Block(block, _) = body.value.kind else {
            return;
        };
--- a/compiler/rustc_hir_typeck/src/demand.rs
+++ b/compiler/rustc_hir_typeck/src/demand.rs
@ -327,8 +327,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
        }

        let mut expr_finder = FindExprs { hir_id: local_hir_id, uses: init.into_iter().collect() };
-        let body =
-            hir.body(hir.maybe_body_owned_by(self.body_id).expect("expected item to have body"));
+        let body = hir.body_owned_by(self.body_id);
        expr_finder.visit_expr(body.value);

        // Replaces all of the variables in the given type with a fresh inference variable.
--- a/compiler/rustc_hir_typeck/src/expr.rs
+++ b/compiler/rustc_hir_typeck/src/expr.rs
@ -909,8 +909,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
            // the first place.
            assert_ne!(encl_item_id.def_id, encl_body_owner_id);

-            let encl_body_id = self.tcx.hir().body_owned_by(encl_body_owner_id);
-            let encl_body = self.tcx.hir().body(encl_body_id);
+            let encl_body = self.tcx.hir().body_owned_by(encl_body_owner_id);

            err.encl_body_span = Some(encl_body.value.span);
            err.encl_fn_span = Some(*encl_fn_span);
--- a/compiler/rustc_hir_typeck/src/fallback.rs
+++ b/compiler/rustc_hir_typeck/src/fallback.rs
@ -544,9 +544,8 @@ fn compute_unsafe_infer_vars<'a, 'tcx>(
    root_ctxt: &'a TypeckRootCtxt<'tcx>,
    body_id: LocalDefId,
 ) -> UnordMap<ty::TyVid, (HirId, Span, UnsafeUseReason)> {
-    let body_id =
+    let body =
        root_ctxt.tcx.hir().maybe_body_owned_by(body_id).expect("body id must have an owner");
-    let body = root_ctxt.tcx.hir().body(body_id);
    let mut res = UnordMap::default();

    struct UnsafeInferVarsVisitor<'a, 'tcx, 'r> {
--- a/compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs
+++ b/compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs
@ -1973,8 +1973,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
            *expr
        } else {
            let body_def_id = hir.enclosing_body_owner(expr.hir_id);
-            let body_id = hir.body_owned_by(body_def_id);
-            let body = hir.body(body_id);
+            let body = hir.body_owned_by(body_def_id);

            // Get tail expr of the body
            match body.value.kind {
--- a/compiler/rustc_hir_typeck/src/method/suggest.rs
+++ b/compiler/rustc_hir_typeck/src/method/suggest.rs
@ -505,9 +505,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
            && let hir::def::Res::Local(recv_id) = path.res
            && let Some(segment) = path.segments.first()
        {
-            let map = self.infcx.tcx.hir();
-            let body_id = self.tcx.hir().body_owned_by(self.body_id);
-            let body = map.body(body_id);
+            let body = self.tcx.hir().body_owned_by(self.body_id);

            if let Node::Expr(call_expr) = self.tcx.parent_hir_node(rcvr.hir_id) {
                let mut let_visitor = LetVisitor {
@ -518,7 +516,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                    method_name,
                    sugg_let: None,
                };
-                let_visitor.visit_body(body);
+                let_visitor.visit_body(&body);
                if let Some(sugg_let) = let_visitor.sugg_let
                    && let Some(self_ty) = self.node_ty_opt(sugg_let.init_hir_id)
                {
@ -2429,9 +2427,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
            seg1.ident.span,
            StashKey::CallAssocMethod,
            |err| {
-                let map = self.infcx.tcx.hir();
-                let body_id = self.tcx.hir().body_owned_by(self.body_id);
-                let body = map.body(body_id);
+                let body = self.tcx.hir().body_owned_by(self.body_id);
                struct LetVisitor {
                    ident_name: Symbol,
                }
@ -2453,7 +2449,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {

                if let Node::Expr(call_expr) = self.tcx.parent_hir_node(seg1.hir_id)
                    && let ControlFlow::Break(Some(expr)) =
-                        (LetVisitor { ident_name: seg1.ident.name }).visit_body(body)
+                        (LetVisitor { ident_name: seg1.ident.name }).visit_body(&body)
                    && let Some(self_ty) = self.node_ty_opt(expr.hir_id)
                {
                    let probe = self.lookup_probe_for_diagnostic(
--- a/compiler/rustc_infer/src/infer/error_reporting/need_type_info.rs
+++ b/compiler/rustc_infer/src/infer/error_reporting/need_type_info.rs
@ -457,10 +457,10 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
        };

        let mut local_visitor = FindInferSourceVisitor::new(self, typeck_results, arg);
-        if let Some(body_id) = self.tcx.hir().maybe_body_owned_by(
+        if let Some(body) = self.tcx.hir().maybe_body_owned_by(
            self.tcx.typeck_root_def_id(body_def_id.to_def_id()).expect_local(),
        ) {
-            let expr = self.tcx.hir().body(body_id).value;
+            let expr = body.value;
            local_visitor.visit_expr(expr);
        }

@ -1163,7 +1163,7 @@ impl<'a, 'tcx> Visitor<'tcx> for FindInferSourceVisitor<'a, 'tcx> {

    /// For closures, we first visit the parameters and then the content,
    /// as we prefer those.
-    fn visit_body(&mut self, body: &'tcx Body<'tcx>) {
+    fn visit_body(&mut self, body: &Body<'tcx>) {
        for param in body.params {
            debug!(
                "param: span {:?}, ty_span {:?}, pat.span {:?}",
--- a/compiler/rustc_infer/src/infer/error_reporting/nice_region_error/util.rs
+++ b/compiler/rustc_infer/src/infer/error_reporting/nice_region_error/util.rs
@ -62,14 +62,13 @@ pub fn find_param_with_region<'tcx>(
        _ => {}
    }

-    let body_id = hir.maybe_body_owned_by(def_id)?;
+    let body = hir.maybe_body_owned_by(def_id)?;

-    let owner_id = hir.body_owner(body_id);
+    let owner_id = hir.body_owner(body.id());
    let fn_decl = hir.fn_decl_by_hir_id(owner_id)?;
    let poly_fn_sig = tcx.fn_sig(id).instantiate_identity();

    let fn_sig = tcx.liberate_late_bound_regions(id, poly_fn_sig);
-    let body = hir.body(body_id);
    body.params
        .iter()
        .take(if fn_sig.c_variadic {
--- a/compiler/rustc_infer/src/infer/error_reporting/suggest.rs
+++ b/compiler/rustc_infer/src/infer/error_reporting/suggest.rs
@ -578,16 +578,11 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
                    walk_stmt(self, ex)
                }
            }
-
-            fn visit_body(&mut self, body: &'v hir::Body<'v>) -> Self::Result {
-                hir::intravisit::walk_body(self, body)
-            }
        }

-        self.tcx.hir().maybe_body_owned_by(cause.body_id).and_then(|body_id| {
-            let body = self.tcx.hir().body(body_id);
+        self.tcx.hir().maybe_body_owned_by(cause.body_id).and_then(|body| {
            IfVisitor { err_span: span, found_if: false }
-                .visit_body(body)
+                .visit_body(&body)
                .is_break()
                .then(|| TypeErrorAdditionalDiags::AddLetForLetChains { span: span.shrink_to_lo() })
        })
--- a/compiler/rustc_lint/src/late.rs
+++ b/compiler/rustc_lint/src/late.rs
@ -125,7 +125,7 @@ impl<'tcx, T: LateLintPass<'tcx>> hir_visit::Visitor<'tcx> for LateContextAndPas
        });
    }

-    fn visit_body(&mut self, body: &'tcx hir::Body<'tcx>) {
+    fn visit_body(&mut self, body: &hir::Body<'tcx>) {
        lint_callback!(self, check_body, body);
        hir_visit::walk_body(self, body);
        lint_callback!(self, check_body_post, body);
--- a/compiler/rustc_lint/src/non_local_def.rs
+++ b/compiler/rustc_lint/src/non_local_def.rs
@ -68,11 +68,11 @@ impl_lint_pass!(NonLocalDefinitions => [NON_LOCAL_DEFINITIONS]);
 // instead check_mod is called after every body has been handled.

 impl<'tcx> LateLintPass<'tcx> for NonLocalDefinitions {
-    fn check_body(&mut self, _cx: &LateContext<'tcx>, _body: &'tcx Body<'tcx>) {
+    fn check_body(&mut self, _cx: &LateContext<'tcx>, _body: &Body<'tcx>) {
        self.body_depth += 1;
    }

-    fn check_body_post(&mut self, _cx: &LateContext<'tcx>, _body: &'tcx Body<'tcx>) {
+    fn check_body_post(&mut self, _cx: &LateContext<'tcx>, _body: &Body<'tcx>) {
        self.body_depth -= 1;
    }

--- a/compiler/rustc_lint/src/passes.rs
+++ b/compiler/rustc_lint/src/passes.rs
@ -7,8 +7,8 @@ use rustc_session::lint::LintPass;
 macro_rules! late_lint_methods {
    ($macro:path, $args:tt) => (
        $macro!($args, [
-            fn check_body(a: &'tcx rustc_hir::Body<'tcx>);
-            fn check_body_post(a: &'tcx rustc_hir::Body<'tcx>);
+            fn check_body(a: &rustc_hir::Body<'tcx>);
+            fn check_body_post(a: &rustc_hir::Body<'tcx>);
            fn check_crate();
            fn check_crate_post();
            fn check_mod(a: &'tcx rustc_hir::Mod<'tcx>, b: rustc_hir::HirId);
--- a/compiler/rustc_metadata/src/rmeta/encoder.rs
+++ b/compiler/rustc_metadata/src/rmeta/encoder.rs
@ -1677,9 +1677,9 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
                if should_encode_const(tcx.def_kind(def_id)) {
                    let qualifs = tcx.mir_const_qualif(def_id);
                    record!(self.tables.mir_const_qualif[def_id.to_def_id()] <- qualifs);
-                    let body_id = tcx.hir().maybe_body_owned_by(def_id);
-                    if let Some(body_id) = body_id {
-                        let const_data = rendered_const(self.tcx, body_id);
+                    let body = tcx.hir().maybe_body_owned_by(def_id);
+                    if let Some(body) = body {
+                        let const_data = rendered_const(self.tcx, &body, def_id);
                        record!(self.tables.rendered_const[def_id.to_def_id()] <- const_data);
                    }
                }
@ -2368,9 +2368,9 @@ pub fn provide(providers: &mut Providers) {
 /// Whenever possible, prefer to evaluate the constant first and try to
 /// use a different method for pretty-printing. Ideally this function
 /// should only ever be used as a fallback.
-pub fn rendered_const<'tcx>(tcx: TyCtxt<'tcx>, body: hir::BodyId) -> String {
+pub fn rendered_const<'tcx>(tcx: TyCtxt<'tcx>, body: &hir::Body<'_>, def_id: LocalDefId) -> String {
    let hir = tcx.hir();
-    let value = &hir.body(body).value;
+    let value = body.value;

    #[derive(PartialEq, Eq)]
    enum Classification {
@ -2426,13 +2426,13 @@ pub fn rendered_const<'tcx>(tcx: TyCtxt<'tcx>, body: hir::BodyId) -> String {

        // Otherwise we prefer pretty-printing to get rid of extraneous whitespace, comments and
        // other formatting artifacts.
-        Literal | Simple => id_to_string(&hir, body.hir_id),
+        Literal | Simple => id_to_string(&hir, body.id().hir_id),

        // FIXME: Omit the curly braces if the enclosing expression is an array literal
        //        with a repeated element (an `ExprKind::Repeat`) as in such case it
        //        would not actually need any disambiguation.
        Complex => {
-            if tcx.def_kind(hir.body_owner_def_id(body).to_def_id()) == DefKind::AnonConst {
+            if tcx.def_kind(def_id) == DefKind::AnonConst {
                "{ _ }".to_owned()
            } else {
                "_".to_owned()
--- a/compiler/rustc_middle/src/hir/map/mod.rs
+++ b/compiler/rustc_middle/src/hir/map/mod.rs
@ -1,3 +1,5 @@
+use std::borrow::Cow;
+
 use crate::hir::ModuleItems;
 use crate::middle::debugger_visualizer::DebuggerVisualizerFile;
 use crate::query::LocalCrate;
@ -254,13 +256,26 @@ impl<'hir> Map<'hir> {

    /// Given a `LocalDefId`, returns the `BodyId` associated with it,
    /// if the node is a body owner, otherwise returns `None`.
-    pub fn maybe_body_owned_by(self, id: LocalDefId) -> Option<BodyId> {
-        self.tcx.hir_node_by_def_id(id).body_id()
+    pub fn maybe_body_owned_by(self, id: LocalDefId) -> Option<Cow<'hir, Body<'hir>>> {
+        Some(match self.tcx.def_kind(id) {
+            // Inline consts do not have bodies of their own, so create one to make the follow-up logic simpler.
+            DefKind::InlineConst => {
+                let e = self.expect_expr(self.tcx.local_def_id_to_hir_id(id));
+                Cow::Owned(Body {
+                    params: &[],
+                    value: match e.kind {
+                        ExprKind::ConstBlock(body) => body,
+                        _ => span_bug!(e.span, "InlineConst was not a ConstBlock: {e:#?}"),
+                    },
+                })
+            }
+            _ => Cow::Borrowed(self.body(self.tcx.hir_node_by_def_id(id).body_id()?)),
+        })
    }

    /// Given a body owner's id, returns the `BodyId` associated with it.
    #[track_caller]
-    pub fn body_owned_by(self, id: LocalDefId) -> BodyId {
+    pub fn body_owned_by(self, id: LocalDefId) -> Cow<'hir, Body<'hir>> {
        self.maybe_body_owned_by(id).unwrap_or_else(|| {
            let hir_id = self.tcx.local_def_id_to_hir_id(id);
            span_bug!(
--- a/compiler/rustc_middle/src/hir/mod.rs
+++ b/compiler/rustc_middle/src/hir/mod.rs
@ -194,8 +194,7 @@ pub fn provide(providers: &mut Providers) {
    };
    providers.fn_arg_names = |tcx, def_id| {
        let hir = tcx.hir();
-        let hir_id = tcx.local_def_id_to_hir_id(def_id);
-        if let Some(body_id) = hir.maybe_body_owned_by(def_id) {
+        if let Some(body_id) = tcx.hir_node_by_def_id(def_id).body_id() {
            tcx.arena.alloc_from_iter(hir.body_param_names(body_id))
        } else if let Node::TraitItem(&TraitItem {
            kind: TraitItemKind::Fn(_, TraitFn::Required(idents)),
@ -204,11 +203,15 @@ pub fn provide(providers: &mut Providers) {
        | Node::ForeignItem(&ForeignItem {
            kind: ForeignItemKind::Fn(_, idents, _),
            ..
-        }) = tcx.hir_node(hir_id)
+        }) = tcx.hir_node(tcx.local_def_id_to_hir_id(def_id))
        {
            idents
        } else {
-            span_bug!(hir.span(hir_id), "fn_arg_names: unexpected item {:?}", def_id);
+            span_bug!(
+                hir.span(tcx.local_def_id_to_hir_id(def_id)),
+                "fn_arg_names: unexpected item {:?}",
+                def_id
+            );
        }
    };
    providers.all_local_trait_impls = |tcx, ()| &tcx.resolutions(()).trait_impls;
--- a/compiler/rustc_mir_build/src/build/mod.rs
+++ b/compiler/rustc_mir_build/src/build/mod.rs
@ -452,7 +452,7 @@ fn construct_fn<'tcx>(
    assert_eq!(expr.as_usize(), thir.exprs.len() - 1);

    // Figure out what primary body this item has.
-    let body_id = tcx.hir().body_owned_by(fn_def);
+    let body = tcx.hir().body_owned_by(fn_def);
    let span_with_body = tcx.hir().span_with_body(fn_id);
    let return_ty_span = tcx
        .hir()
@ -512,9 +512,9 @@ fn construct_fn<'tcx>(
    );

    let call_site_scope =
-        region::Scope { id: body_id.hir_id.local_id, data: region::ScopeData::CallSite };
+        region::Scope { id: body.id().hir_id.local_id, data: region::ScopeData::CallSite };
    let arg_scope =
-        region::Scope { id: body_id.hir_id.local_id, data: region::ScopeData::Arguments };
+        region::Scope { id: body.id().hir_id.local_id, data: region::ScopeData::Arguments };
    let source_info = builder.source_info(span);
    let call_site_s = (call_site_scope, source_info);
    unpack!(builder.in_scope(call_site_s, LintLevel::Inherited, |builder| {
--- a/compiler/rustc_mir_build/src/thir/cx/mod.rs
+++ b/compiler/rustc_mir_build/src/thir/cx/mod.rs
@ -13,10 +13,10 @@ use rustc_hir::def_id::{DefId, LocalDefId};
 use rustc_hir::lang_items::LangItem;
 use rustc_hir::HirId;
 use rustc_hir::Node;
+use rustc_middle::bug;
 use rustc_middle::middle::region;
 use rustc_middle::thir::*;
 use rustc_middle::ty::{self, RvalueScopes, TyCtxt};
-use rustc_middle::{bug, span_bug};
 use tracing::instrument;

 pub(crate) fn thir_body(
@ -24,22 +24,7 @@ pub(crate) fn thir_body(
    owner_def: LocalDefId,
 ) -> Result<(&Steal<Thir<'_>>, ExprId), ErrorGuaranteed> {
    let hir = tcx.hir();
-    let body;
-    let body = match tcx.def_kind(owner_def) {
-        // Inline consts do not have bodies of their own, so create one to make the follow-up logic simpler.
-        DefKind::InlineConst => {
-            let e = hir.expect_expr(tcx.local_def_id_to_hir_id(owner_def));
-            body = hir::Body {
-                params: &[],
-                value: match e.kind {
-                    hir::ExprKind::ConstBlock(body) => body,
-                    _ => span_bug!(e.span, "InlineConst was not a ConstBlock: {e:#?}"),
-                },
-            };
-            &body
-        }
-        _ => hir.body(hir.body_owned_by(owner_def)),
-    };
+    let body = hir.body_owned_by(owner_def);
    let mut cx = Cx::new(tcx, owner_def);
    if let Some(reported) = cx.typeck_results.tainted_by_errors {
        return Err(reported);
@ -49,7 +34,7 @@ pub(crate) fn thir_body(
    let owner_id = tcx.local_def_id_to_hir_id(owner_def);
    if let Some(fn_decl) = hir.fn_decl_by_hir_id(owner_id) {
        let closure_env_param = cx.closure_env_param(owner_def, owner_id);
-        let explicit_params = cx.explicit_params(owner_id, fn_decl, body);
+        let explicit_params = cx.explicit_params(owner_id, fn_decl, &body);
        cx.thir.params = closure_env_param.into_iter().chain(explicit_params).collect();

        // The resume argument may be missing, in that case we need to provide it here.
--- a/compiler/rustc_mir_transform/src/lib.rs
+++ b/compiler/rustc_mir_transform/src/lib.rs
@ -226,7 +226,8 @@ fn mir_keys(tcx: TyCtxt<'_>, (): ()) -> FxIndexSet<LocalDefId> {
    // typeck instead of during ast lowering, like all other bodies so far.
    for def_id in tcx.hir().body_owners() {
        // Incremental performance optimization: only load typeck results for things that actually have inline consts
-        if tcx.hir_owner_nodes(tcx.hir().body_owned_by(def_id).hir_id.owner).has_inline_consts {
+        if tcx.hir_owner_nodes(tcx.hir().body_owned_by(def_id).id().hir_id.owner).has_inline_consts
+        {
            set.extend(tcx.typeck(def_id).inline_consts.values())
        }
    }
--- a/compiler/rustc_passes/src/check_const.rs
+++ b/compiler/rustc_passes/src/check_const.rs
@ -196,7 +196,7 @@ impl<'tcx> Visitor<'tcx> for CheckConstVisitor<'tcx> {
        self.recurse_into(kind, None, |this| intravisit::walk_anon_const(this, anon));
    }

-    fn visit_body(&mut self, body: &'tcx hir::Body<'tcx>) {
+    fn visit_body(&mut self, body: &hir::Body<'tcx>) {
        let owner = self.tcx.hir().body_owner_def_id(body.id());
        let kind = self.tcx.hir().body_const_context(owner);
        self.recurse_into(kind, Some(owner), |this| intravisit::walk_body(this, body));
--- a/compiler/rustc_passes/src/hir_stats.rs
+++ b/compiler/rustc_passes/src/hir_stats.rs
@ -246,7 +246,7 @@ impl<'v> hir_visit::Visitor<'v> for StatCollector<'v> {
        hir_visit::walk_item(self, i)
    }

-    fn visit_body(&mut self, b: &'v hir::Body<'v>) {
+    fn visit_body(&mut self, b: &hir::Body<'v>) {
        self.record("Body", Id::None, b);
        hir_visit::walk_body(self, b);
    }
--- a/compiler/rustc_passes/src/liveness.rs
+++ b/compiler/rustc_passes/src/liveness.rs
@ -158,9 +158,8 @@ fn check_liveness(tcx: TyCtxt<'_>, def_id: LocalDefId) {
    }

    let mut maps = IrMaps::new(tcx);
-    let body_id = tcx.hir().body_owned_by(def_id);
-    let hir_id = tcx.hir().body_owner(body_id);
-    let body = tcx.hir().body(body_id);
+    let body = tcx.hir().body_owned_by(def_id);
+    let hir_id = tcx.hir().body_owner(body.id());

    if let Some(upvars) = tcx.upvars_mentioned(def_id) {
        for &var_hir_id in upvars.keys() {
@ -171,17 +170,17 @@ fn check_liveness(tcx: TyCtxt<'_>, def_id: LocalDefId) {

    // gather up the various local variables, significant expressions,
    // and so forth:
-    maps.visit_body(body);
+    maps.visit_body(&body);

    // compute liveness
    let mut lsets = Liveness::new(&mut maps, def_id);
-    let entry_ln = lsets.compute(body, hir_id);
-    lsets.log_liveness(entry_ln, body_id.hir_id);
+    let entry_ln = lsets.compute(&body, hir_id);
+    lsets.log_liveness(entry_ln, body.id().hir_id);

    // check for various error conditions
-    lsets.visit_body(body);
+    lsets.visit_body(&body);
    lsets.warn_about_unused_upvars(entry_ln);
-    lsets.warn_about_unused_args(body, entry_ln);
+    lsets.warn_about_unused_args(&body, entry_ln);
 }

 pub fn provide(providers: &mut Providers) {
--- a/compiler/rustc_passes/src/upvars.rs
+++ b/compiler/rustc_passes/src/upvars.rs
@ -16,17 +16,17 @@ pub fn provide(providers: &mut Providers) {
        }

        let local_def_id = def_id.expect_local();
-        let body = tcx.hir().body(tcx.hir().maybe_body_owned_by(local_def_id)?);
+        let body = tcx.hir().maybe_body_owned_by(local_def_id)?;

        let mut local_collector = LocalCollector::default();
-        local_collector.visit_body(body);
+        local_collector.visit_body(&body);

        let mut capture_collector = CaptureCollector {
            tcx,
            locals: &local_collector.locals,
            upvars: FxIndexMap::default(),
        };
-        capture_collector.visit_body(body);
+        capture_collector.visit_body(&body);

        if !capture_collector.upvars.is_empty() {
            Some(tcx.arena.alloc(capture_collector.upvars))
--- a/compiler/rustc_privacy/src/lib.rs
+++ b/compiler/rustc_privacy/src/lib.rs
@ -1695,7 +1695,7 @@ fn check_mod_privacy(tcx: TyCtxt<'_>, module_def_id: LocalModDefId) {
        rustc_ty_utils::sig_types::walk_types(tcx, def_id, &mut visitor);

        if let Some(body_id) = tcx.hir().maybe_body_owned_by(def_id) {
-            visitor.visit_nested_body(body_id);
+            visitor.visit_nested_body(body_id.id());
        }
    }

--- a/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
+++ b/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
@ -907,10 +907,9 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
            span.remove_mark();
        }
        let mut expr_finder = FindExprBySpan::new(span, self.tcx);
-        let Some(body_id) = self.tcx.hir().maybe_body_owned_by(obligation.cause.body_id) else {
+        let Some(body) = self.tcx.hir().maybe_body_owned_by(obligation.cause.body_id) else {
            return;
        };
-        let body = self.tcx.hir().body(body_id);
        expr_finder.visit_expr(body.value);
        let Some(expr) = expr_finder.result else {
            return;
@ -1369,12 +1368,11 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
                        // Issue #104961, we need to add parentheses properly for compound expressions
                        // for example, `x.starts_with("hi".to_string() + "you")`
                        // should be `x.starts_with(&("hi".to_string() + "you"))`
-                        let Some(body_id) =
+                        let Some(body) =
                            self.tcx.hir().maybe_body_owned_by(obligation.cause.body_id)
                        else {
                            return false;
                        };
-                        let body = self.tcx.hir().body(body_id);
                        let mut expr_finder = FindExprBySpan::new(span, self.tcx);
                        expr_finder.visit_expr(body.value);
                        let Some(expr) = expr_finder.result else {
@ -1476,10 +1474,9 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
            span.remove_mark();
        }
        let mut expr_finder = super::FindExprBySpan::new(span, self.tcx);
-        let Some(body_id) = self.tcx.hir().maybe_body_owned_by(obligation.cause.body_id) else {
+        let Some(body) = self.tcx.hir().maybe_body_owned_by(obligation.cause.body_id) else {
            return false;
        };
-        let body = self.tcx.hir().body(body_id);
        expr_finder.visit_expr(body.value);
        let mut maybe_suggest = |suggested_ty, count, suggestions| {
            // Remapping bound vars here
@ -1805,10 +1802,10 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
            );
        }

-        let body = self.tcx.hir().body(self.tcx.hir().body_owned_by(obligation.cause.body_id));
+        let body = self.tcx.hir().body_owned_by(obligation.cause.body_id);

        let mut visitor = ReturnsVisitor::default();
-        visitor.visit_body(body);
+        visitor.visit_body(&body);

        let mut sugg =
            vec![(span.shrink_to_lo(), "Box<".to_string()), (span.shrink_to_hi(), ">".to_string())];
@ -2348,13 +2345,11 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
            ?span,
        );

-        let coroutine_body = coroutine_did
-            .as_local()
-            .and_then(|def_id| hir.maybe_body_owned_by(def_id))
-            .map(|body_id| hir.body(body_id));
+        let coroutine_body =
+            coroutine_did.as_local().and_then(|def_id| hir.maybe_body_owned_by(def_id));
        let mut visitor = AwaitsVisitor::default();
        if let Some(body) = coroutine_body {
-            visitor.visit_body(body);
+            visitor.visit_body(&body);
        }
        debug!(awaits = ?visitor.awaits);

@ -4748,7 +4743,7 @@ impl<'v> Visitor<'v> for ReturnsVisitor<'v> {
        }
    }

-    fn visit_body(&mut self, body: &'v hir::Body<'v>) {
+    fn visit_body(&mut self, body: &hir::Body<'v>) {
        assert!(!self.in_block_tail);
        self.in_block_tail = true;
        hir::intravisit::walk_body(self, body);
--- a/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs
+++ b/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs
@ -2451,11 +2451,10 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
                }

                if let Some(ty::GenericArgKind::Type(_)) = arg.map(|arg| arg.unpack())
-                    && let Some(body_id) =
-                        self.tcx.hir().maybe_body_owned_by(obligation.cause.body_id)
+                    && let Some(body) = self.tcx.hir().maybe_body_owned_by(obligation.cause.body_id)
                {
                    let mut expr_finder = FindExprBySpan::new(span, self.tcx);
-                    expr_finder.visit_expr(self.tcx.hir().body(body_id).value);
+                    expr_finder.visit_expr(&body.value);

                    if let Some(hir::Expr {
                        kind:
--- a/compiler/rustc_ty_utils/src/opaque_types.rs
+++ b/compiler/rustc_ty_utils/src/opaque_types.rs
@ -109,7 +109,7 @@ impl<'tcx> OpaqueTypeCollector<'tcx> {

    #[instrument(level = "trace", skip(self))]
    fn collect_taits_declared_in_body(&mut self) {
-        let body = self.tcx.hir().body(self.tcx.hir().body_owned_by(self.item)).value;
+        let body = self.tcx.hir().body_owned_by(self.item).value;
        struct TaitInBodyFinder<'a, 'tcx> {
            collector: &'a mut OpaqueTypeCollector<'tcx>,
        }
--- a/src/librustdoc/clean/types.rs
+++ b/src/librustdoc/clean/types.rs
@ -2133,7 +2133,9 @@ impl Discriminant {
    /// Will be `None` in the case of cross-crate reexports, and may be
    /// simplified
    pub(crate) fn expr(&self, tcx: TyCtxt<'_>) -> Option<String> {
-        self.expr.map(|body| rendered_const(tcx, body))
+        self.expr.map(|body| {
+            rendered_const(tcx, tcx.hir().body(body), tcx.hir().body_owner_def_id(body))
+        })
    }
    pub(crate) fn value(&self, tcx: TyCtxt<'_>, with_underscores: bool) -> String {
        print_evaluated_const(tcx, self.value, with_underscores, false).unwrap()
@ -2419,7 +2421,7 @@ impl ConstantKind {
            ConstantKind::TyConst { ref expr } => expr.to_string(),
            ConstantKind::Extern { def_id } => print_inlined_const(tcx, def_id),
            ConstantKind::Local { body, .. } | ConstantKind::Anonymous { body } => {
-                rendered_const(tcx, body)
+                rendered_const(tcx, tcx.hir().body(body), tcx.hir().body_owner_def_id(body))
            }
        }
    }
--- a/src/librustdoc/clean/utils.rs
+++ b/src/librustdoc/clean/utils.rs
@ -342,7 +342,7 @@ pub(crate) fn print_const(cx: &DocContext<'_>, n: ty::Const<'_>) -> String {
    match n.kind() {
        ty::ConstKind::Unevaluated(ty::UnevaluatedConst { def, args: _ }) => {
            let s = if let Some(def) = def.as_local() {
-                rendered_const(cx.tcx, cx.tcx.hir().body_owned_by(def))
+                rendered_const(cx.tcx, &cx.tcx.hir().body_owned_by(def), def)
            } else {
                inline::print_inlined_const(cx.tcx, def)
            };
--- a/src/librustdoc/core.rs
+++ b/src/librustdoc/core.rs
@ -284,9 +284,9 @@ pub(crate) fn create_config(
                }

                let hir = tcx.hir();
-                let body = hir.body(hir.body_owned_by(def_id));
+                let body = hir.body_owned_by(def_id);
                debug!("visiting body for {def_id:?}");
-                EmitIgnoredResolutionErrors::new(tcx).visit_body(body);
+                EmitIgnoredResolutionErrors::new(tcx).visit_body(&body);
                (rustc_interface::DEFAULT_QUERY_PROVIDERS.typeck)(tcx, def_id)
            };
        }),
--- a/src/librustdoc/html/render/span_map.rs
+++ b/src/librustdoc/html/render/span_map.rs
@ -162,9 +162,7 @@ impl<'tcx> SpanMapVisitor<'tcx> {
        // compiled (because of cfg)!
        //
        // See discussion in https://github.com/rust-lang/rust/issues/69426#issuecomment-1019412352
-        let typeck_results = self
-            .tcx
-            .typeck_body(hir.maybe_body_owned_by(body_id).expect("a body which isn't a body"));
+        let typeck_results = self.tcx.typeck_body(hir.body_owned_by(body_id).id());
        // Interestingly enough, for method calls, we need the whole expression whereas for static
        // method/function calls, we need the call expression specifically.
        if let Some(def_id) = typeck_results.type_dependent_def_id(expr_hir_id.unwrap_or(hir_id)) {
--- a/src/librustdoc/json/conversions.rs
+++ b/src/librustdoc/json/conversions.rs
@ -820,7 +820,10 @@ impl FromWithTcx<clean::Static> for Static {
        Static {
            type_: stat.type_.into_tcx(tcx),
            mutable: stat.mutability == ast::Mutability::Mut,
-            expr: stat.expr.map(|e| rendered_const(tcx, e)).unwrap_or_default(),
+            expr: stat
+                .expr
+                .map(|e| rendered_const(tcx, tcx.hir().body(e), tcx.hir().body_owner_def_id(e)))
+                .unwrap_or_default(),
        }
    }
 }
--- a/src/librustdoc/visit_ast.rs
+++ b/src/librustdoc/visit_ast.rs
@ -614,7 +614,7 @@ impl<'a, 'tcx> Visitor<'tcx> for RustdocVisitor<'a, 'tcx> {
        // Unneeded.
    }

-    fn visit_body(&mut self, b: &'tcx hir::Body<'tcx>) {
+    fn visit_body(&mut self, b: &hir::Body<'tcx>) {
        let prev = mem::replace(&mut self.inside_body, true);
        walk_body(self, b);
        self.inside_body = prev;
--- a/src/tools/clippy/clippy_lints/src/default_numeric_fallback.rs
+++ b/src/tools/clippy/clippy_lints/src/default_numeric_fallback.rs
@ -49,7 +49,7 @@ declare_clippy_lint! {
 declare_lint_pass!(DefaultNumericFallback => [DEFAULT_NUMERIC_FALLBACK]);

 impl<'tcx> LateLintPass<'tcx> for DefaultNumericFallback {
-    fn check_body(&mut self, cx: &LateContext<'tcx>, body: &'tcx Body<'_>) {
+    fn check_body(&mut self, cx: &LateContext<'tcx>, body: &Body<'tcx>) {
        let hir = cx.tcx.hir();
        let is_parent_const = matches!(
            hir.body_const_context(hir.body_owner_def_id(body.id())),
--- a/src/tools/clippy/clippy_lints/src/dereference.rs
+++ b/src/tools/clippy/clippy_lints/src/dereference.rs
@ -641,7 +641,7 @@ impl<'tcx> LateLintPass<'tcx> for Dereferencing<'tcx> {
        }
    }

-    fn check_body_post(&mut self, cx: &LateContext<'tcx>, body: &'tcx Body<'_>) {
+    fn check_body_post(&mut self, cx: &LateContext<'tcx>, body: &Body<'_>) {
        if Some(body.id()) == self.current_body {
            for pat in self.ref_locals.drain(..).filter_map(|(_, x)| x) {
                let replacements = pat.replacements;
--- a/src/tools/clippy/clippy_lints/src/implicit_hasher.rs
+++ b/src/tools/clippy/clippy_lints/src/implicit_hasher.rs
@ -328,7 +328,7 @@ impl<'a, 'b, 'tcx> ImplicitHasherConstructorVisitor<'a, 'b, 'tcx> {
 impl<'a, 'b, 'tcx> Visitor<'tcx> for ImplicitHasherConstructorVisitor<'a, 'b, 'tcx> {
    type NestedFilter = nested_filter::OnlyBodies;

-    fn visit_body(&mut self, body: &'tcx Body<'_>) {
+    fn visit_body(&mut self, body: &Body<'tcx>) {
        let old_maybe_typeck_results = self.maybe_typeck_results.replace(self.cx.tcx.typeck_body(body.id()));
        walk_body(self, body);
        self.maybe_typeck_results = old_maybe_typeck_results;
--- a/src/tools/clippy/clippy_lints/src/macro_metavars_in_unsafe.rs
+++ b/src/tools/clippy/clippy_lints/src/macro_metavars_in_unsafe.rs
@ -186,7 +186,7 @@ impl<'a, 'tcx> Visitor<'tcx> for BodyVisitor<'a, 'tcx> {
 }

 impl<'tcx> LateLintPass<'tcx> for ExprMetavarsInUnsafe {
-    fn check_body(&mut self, cx: &LateContext<'tcx>, body: &'tcx rustc_hir::Body<'tcx>) {
+    fn check_body(&mut self, cx: &LateContext<'tcx>, body: &rustc_hir::Body<'tcx>) {
        if is_lint_allowed(cx, MACRO_METAVARS_IN_UNSAFE, body.value.hir_id) {
            return;
        }
--- a/src/tools/clippy/clippy_lints/src/methods/option_map_unwrap_or.rs
+++ b/src/tools/clippy/clippy_lints/src/methods/option_map_unwrap_or.rs
@ -59,8 +59,8 @@ pub(super) fn check<'tcx>(
            };

            let map = cx.tcx.hir();
-            let body = map.body(map.body_owned_by(map.enclosing_body_owner(expr.hir_id)));
-            reference_visitor.visit_body(body);
+            let body = map.body_owned_by(map.enclosing_body_owner(expr.hir_id));
+            reference_visitor.visit_body(&body);

            if reference_visitor.found_reference {
                return;
--- a/src/tools/clippy/clippy_lints/src/needless_borrows_for_generic_args.rs
+++ b/src/tools/clippy/clippy_lints/src/needless_borrows_for_generic_args.rs
@ -129,7 +129,7 @@ impl<'tcx> LateLintPass<'tcx> for NeedlessBorrowsForGenericArgs<'tcx> {
        }
    }

-    fn check_body_post(&mut self, cx: &LateContext<'tcx>, body: &'tcx Body<'_>) {
+    fn check_body_post(&mut self, cx: &LateContext<'tcx>, body: &Body<'_>) {
        if self.possible_borrowers.last().map_or(false, |&(local_def_id, _)| {
            local_def_id == cx.tcx.hir().body_owner_def_id(body.id())
        }) {
--- a/src/tools/clippy/clippy_lints/src/only_used_in_recursion.rs
+++ b/src/tools/clippy/clippy_lints/src/only_used_in_recursion.rs
@ -221,7 +221,7 @@ pub struct OnlyUsedInRecursion {
 }

 impl<'tcx> LateLintPass<'tcx> for OnlyUsedInRecursion {
-    fn check_body(&mut self, cx: &LateContext<'tcx>, body: &'tcx Body<'tcx>) {
+    fn check_body(&mut self, cx: &LateContext<'tcx>, body: &Body<'tcx>) {
        if body.value.span.from_expansion() {
            return;
        }
@ -350,7 +350,7 @@ impl<'tcx> LateLintPass<'tcx> for OnlyUsedInRecursion {
        }
    }

-    fn check_body_post(&mut self, cx: &LateContext<'tcx>, body: &'tcx Body<'tcx>) {
+    fn check_body_post(&mut self, cx: &LateContext<'tcx>, body: &Body<'tcx>) {
        if self.entered_body == Some(body.value.hir_id) {
            self.entered_body = None;
            self.params.flag_for_linting();
--- a/src/tools/clippy/clippy_lints/src/operators/mod.rs
+++ b/src/tools/clippy/clippy_lints/src/operators/mod.rs
@ -868,11 +868,11 @@ impl<'tcx> LateLintPass<'tcx> for Operators {
        self.arithmetic_context.expr_post(e.hir_id);
    }

-    fn check_body(&mut self, cx: &LateContext<'tcx>, b: &'tcx Body<'_>) {
+    fn check_body(&mut self, cx: &LateContext<'tcx>, b: &Body<'_>) {
        self.arithmetic_context.enter_body(cx, b);
    }

-    fn check_body_post(&mut self, cx: &LateContext<'tcx>, b: &'tcx Body<'_>) {
+    fn check_body_post(&mut self, cx: &LateContext<'tcx>, b: &Body<'_>) {
        self.arithmetic_context.body_post(cx, b);
    }
 }
--- a/src/tools/clippy/clippy_lints/src/ptr.rs
+++ b/src/tools/clippy/clippy_lints/src/ptr.rs
@ -188,7 +188,7 @@ impl<'tcx> LateLintPass<'tcx> for Ptr {
        }
    }

-    fn check_body(&mut self, cx: &LateContext<'tcx>, body: &'tcx Body<'_>) {
+    fn check_body(&mut self, cx: &LateContext<'tcx>, body: &Body<'tcx>) {
        let hir = cx.tcx.hir();
        let mut parents = hir.parent_iter(body.value.hir_id);
        let (item_id, sig, is_trait_item) = match parents.next() {
@ -525,7 +525,7 @@ fn check_fn_args<'cx, 'tcx: 'cx>(
        })
 }

-fn check_mut_from_ref<'tcx>(cx: &LateContext<'tcx>, sig: &FnSig<'_>, body: Option<&'tcx Body<'_>>) {
+fn check_mut_from_ref<'tcx>(cx: &LateContext<'tcx>, sig: &FnSig<'_>, body: Option<&Body<'tcx>>) {
    if let FnRetTy::Return(ty) = sig.decl.output
        && let Some((out, Mutability::Mut, _)) = get_ref_lm(ty)
    {
@ -559,7 +559,7 @@ fn check_mut_from_ref<'tcx>(cx: &LateContext<'tcx>, sig: &FnSig<'_>, body: Optio
 }

 #[expect(clippy::too_many_lines)]
-fn check_ptr_arg_usage<'tcx>(cx: &LateContext<'tcx>, body: &'tcx Body<'_>, args: &[PtrArg<'tcx>]) -> Vec<PtrArgResult> {
+fn check_ptr_arg_usage<'tcx>(cx: &LateContext<'tcx>, body: &Body<'tcx>, args: &[PtrArg<'tcx>]) -> Vec<PtrArgResult> {
    struct V<'cx, 'tcx> {
        cx: &'cx LateContext<'tcx>,
        /// Map from a local id to which argument it came from (index into `Self::args` and
--- a/src/tools/clippy/clippy_lints/src/question_mark.rs
+++ b/src/tools/clippy/clippy_lints/src/question_mark.rs
@ -370,11 +370,11 @@ impl<'tcx> LateLintPass<'tcx> for QuestionMark {
        }
    }

-    fn check_body(&mut self, _: &LateContext<'tcx>, _: &'tcx Body<'tcx>) {
+    fn check_body(&mut self, _: &LateContext<'tcx>, _: &Body<'tcx>) {
        self.try_block_depth_stack.push(0);
    }

-    fn check_body_post(&mut self, _: &LateContext<'tcx>, _: &'tcx Body<'tcx>) {
+    fn check_body_post(&mut self, _: &LateContext<'tcx>, _: &Body<'tcx>) {
        self.try_block_depth_stack.pop();
    }

--- a/src/tools/clippy/clippy_lints/src/single_call_fn.rs
+++ b/src/tools/clippy/clippy_lints/src/single_call_fn.rs
@ -79,7 +79,6 @@ impl SingleCallFn {
                .tcx
                .hir()
                .maybe_body_owned_by(fn_def_id)
-                .map(|body| cx.tcx.hir().body(body))
                .map_or(true, |body| is_in_test_function(cx.tcx, body.value.hir_id))
            || match cx.tcx.hir_node(fn_hir_id) {
                Node::Item(item) => is_from_proc_macro(cx, item),
--- a/src/tools/clippy/clippy_lints/src/transmute/missing_transmute_annotations.rs
+++ b/src/tools/clippy/clippy_lints/src/transmute/missing_transmute_annotations.rs
@ -30,8 +30,8 @@ fn get_parent_local_binding_ty<'tcx>(cx: &LateContext<'tcx>, expr_hir_id: HirId)

 fn is_function_block(cx: &LateContext<'_>, expr_hir_id: HirId) -> bool {
    let def_id = cx.tcx.hir().enclosing_body_owner(expr_hir_id);
-    if let Some(body_id) = cx.tcx.hir().maybe_body_owned_by(def_id) {
-        let body = cx.tcx.hir().body(body_id);
+    if let Some(body) = cx.tcx.hir().maybe_body_owned_by(def_id) {
+        let body = cx.tcx.hir().body(body.id());
        return body.value.peel_blocks().hir_id == expr_hir_id;
    }
    false
--- a/src/tools/clippy/clippy_lints/src/unconditional_recursion.rs
+++ b/src/tools/clippy/clippy_lints/src/unconditional_recursion.rs
@ -336,7 +336,7 @@ impl UnconditionalRecursion {
                        // We need to use typeck here to infer the actual function being called.
                        && let body_def_id = cx.tcx.hir().enclosing_body_owner(call_expr.hir_id)
                        && let Some(body_owner) = cx.tcx.hir().maybe_body_owned_by(body_def_id)
-                        && let typeck = cx.tcx.typeck_body(body_owner)
+                        && let typeck = cx.tcx.typeck_body(body_owner.id())
                        && let Some(call_def_id) = typeck.type_dependent_def_id(call_expr.hir_id)
                    {
                        self.default_impl_for_type.insert(self_def_id, call_def_id);
--- a/src/tools/clippy/clippy_lints/src/utils/author.rs
+++ b/src/tools/clippy/clippy_lints/src/utils/author.rs
@ -137,9 +137,9 @@ impl<'tcx> LateLintPass<'tcx> for Author {

 fn check_item(cx: &LateContext<'_>, hir_id: HirId) {
    let hir = cx.tcx.hir();
-    if let Some(body_id) = hir.maybe_body_owned_by(hir_id.expect_owner().def_id) {
+    if let Some(body) = hir.maybe_body_owned_by(hir_id.expect_owner().def_id) {
        check_node(cx, hir_id, |v| {
-            v.expr(&v.bind("expr", hir.body(body_id).value));
+            v.expr(&v.bind("expr", body.value));
        });
    }
 }
--- a/tests/ui/inline-const/uninit_local.rs
+++ b/tests/ui/inline-const/uninit_local.rs
@ -0,0 +1,6 @@
+fn main() {
+    let _my_usize = const {
+        let x: bool;
+        while x {} //~ ERROR: `x` isn't initialized
+    };
+}
--- a/tests/ui/inline-const/uninit_local.stderr
+++ b/tests/ui/inline-const/uninit_local.stderr
@ -0,0 +1,16 @@
+error[E0381]: used binding `x` isn't initialized
+  --> $DIR/uninit_local.rs:4:15
+   |
+LL |         let x: bool;
+   |             - binding declared here but left uninitialized
+LL |         while x {}
+   |               ^ `x` used here but it isn't initialized
+   |
+help: consider assigning a value
+   |
+LL |         let x: bool = false;
+   |                     +++++++
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0381`.