Reformat `use` declarations.

The previous commit updated `rustfmt.toml` appropriately. This commit is
the outcome of running `x fmt --all` with the new formatting options.

33 files changed, 130 insertions, 177 deletions

diff --git a/compiler/rustc_const_eval/src/check_consts/check.rs b/compiler/rustc_const_eval/src/check_consts/check.rs
index 8700ec4c210..ffdf790da7a 100644
--- a/compiler/rustc_const_eval/src/check_consts/check.rs
+++ b/compiler/rustc_const_eval/src/check_consts/check.rs
@@ -1,5 +1,8 @@
 //! The `Visitor` responsible for actually checking a `mir::Body` for invalid operations.
 
+use std::mem;
+use std::ops::Deref;
+
 use rustc_errors::{Diag, ErrorGuaranteed};
 use rustc_hir::def_id::DefId;
 use rustc_hir::{self as hir, LangItem};
@@ -9,17 +12,13 @@ use rustc_infer::traits::ObligationCause;
 use rustc_middle::mir::visit::{MutatingUseContext, NonMutatingUseContext, PlaceContext, Visitor};
 use rustc_middle::mir::*;
 use rustc_middle::span_bug;
-use rustc_middle::ty::{self, adjustment::PointerCoercion, Ty, TyCtxt};
-use rustc_middle::ty::{Instance, InstanceKind, TypeVisitableExt};
+use rustc_middle::ty::adjustment::PointerCoercion;
+use rustc_middle::ty::{self, Instance, InstanceKind, Ty, TyCtxt, TypeVisitableExt};
 use rustc_mir_dataflow::Analysis;
 use rustc_span::{sym, Span, Symbol, DUMMY_SP};
 use rustc_trait_selection::error_reporting::InferCtxtErrorExt;
 use rustc_trait_selection::traits::{self, ObligationCauseCode, ObligationCtxt};
 use rustc_type_ir::visit::{TypeSuperVisitable, TypeVisitor};
-
-use std::mem;
-use std::ops::Deref;
-
 use tracing::{debug, instrument, trace};
 
 use super::ops::{self, NonConstOp, Status};
diff --git a/compiler/rustc_const_eval/src/check_consts/mod.rs b/compiler/rustc_const_eval/src/check_consts/mod.rs
index ac8f0d842ee..15ac4cedcc3 100644
--- a/compiler/rustc_const_eval/src/check_consts/mod.rs
+++ b/compiler/rustc_const_eval/src/check_consts/mod.rs
@@ -4,14 +4,12 @@
 //! has interior mutability or needs to be dropped, as well as the visitor that emits errors when
 //! it finds operations that are invalid in a certain context.
 
-use rustc_attr as attr;
 use rustc_errors::DiagCtxtHandle;
-use rustc_hir as hir;
 use rustc_hir::def_id::{DefId, LocalDefId};
-use rustc_middle::bug;
-use rustc_middle::mir;
 use rustc_middle::ty::{self, PolyFnSig, TyCtxt};
+use rustc_middle::{bug, mir};
 use rustc_span::Symbol;
+use {rustc_attr as attr, rustc_hir as hir};
 
 pub use self::qualifs::Qualif;
 
diff --git a/compiler/rustc_const_eval/src/check_consts/ops.rs b/compiler/rustc_const_eval/src/check_consts/ops.rs
index 55432e63ef9..f47a2ec8f75 100644
--- a/compiler/rustc_const_eval/src/check_consts/ops.rs
+++ b/compiler/rustc_const_eval/src/check_consts/ops.rs
@@ -2,7 +2,8 @@
 
 use hir::def_id::LocalDefId;
 use hir::{ConstContext, LangItem};
-use rustc_errors::{codes::*, Diag};
+use rustc_errors::codes::*;
+use rustc_errors::Diag;
 use rustc_hir as hir;
 use rustc_hir::def_id::DefId;
 use rustc_infer::infer::TyCtxtInferExt;
diff --git a/compiler/rustc_const_eval/src/check_consts/post_drop_elaboration.rs b/compiler/rustc_const_eval/src/check_consts/post_drop_elaboration.rs
index f5e745454ab..c4f06e5af0b 100644
--- a/compiler/rustc_const_eval/src/check_consts/post_drop_elaboration.rs
+++ b/compiler/rustc_const_eval/src/check_consts/post_drop_elaboration.rs
@@ -1,7 +1,8 @@
 use rustc_middle::mir::visit::Visitor;
 use rustc_middle::mir::{self, BasicBlock, Location};
 use rustc_middle::ty::{Ty, TyCtxt};
-use rustc_span::{symbol::sym, Span};
+use rustc_span::symbol::sym;
+use rustc_span::Span;
 use tracing::trace;
 
 use super::check::Qualifs;
diff --git a/compiler/rustc_const_eval/src/check_consts/qualifs.rs b/compiler/rustc_const_eval/src/check_consts/qualifs.rs
index d5d3f7767b1..c0f2d113c7e 100644
--- a/compiler/rustc_const_eval/src/check_consts/qualifs.rs
+++ b/compiler/rustc_const_eval/src/check_consts/qualifs.rs
@@ -5,11 +5,10 @@
 use rustc_errors::ErrorGuaranteed;
 use rustc_hir::LangItem;
 use rustc_infer::infer::TyCtxtInferExt;
-use rustc_middle::bug;
-use rustc_middle::mir;
 use rustc_middle::mir::*;
 use rustc_middle::traits::BuiltinImplSource;
 use rustc_middle::ty::{self, AdtDef, GenericArgsRef, Ty};
+use rustc_middle::{bug, mir};
 use rustc_trait_selection::traits::{
     ImplSource, Obligation, ObligationCause, ObligationCtxt, SelectionContext,
 };
diff --git a/compiler/rustc_const_eval/src/check_consts/resolver.rs b/compiler/rustc_const_eval/src/check_consts/resolver.rs
index 011341472b4..ea3a5264357 100644
--- a/compiler/rustc_const_eval/src/check_consts/resolver.rs
+++ b/compiler/rustc_const_eval/src/check_consts/resolver.rs
@@ -2,17 +2,16 @@
 //!
 //! This contains the dataflow analysis used to track `Qualif`s on complex control-flow graphs.
 
+use std::fmt;
+use std::marker::PhantomData;
+
 use rustc_index::bit_set::BitSet;
 use rustc_middle::mir::visit::Visitor;
 use rustc_middle::mir::{
     self, BasicBlock, CallReturnPlaces, Local, Location, Statement, StatementKind, TerminatorEdges,
 };
 use rustc_mir_dataflow::fmt::DebugWithContext;
-use rustc_mir_dataflow::JoinSemiLattice;
-use rustc_mir_dataflow::{Analysis, AnalysisDomain};
-
-use std::fmt;
-use std::marker::PhantomData;
+use rustc_mir_dataflow::{Analysis, AnalysisDomain, JoinSemiLattice};
 
 use super::{qualifs, ConstCx, Qualif};
 
diff --git a/compiler/rustc_const_eval/src/const_eval/dummy_machine.rs b/compiler/rustc_const_eval/src/const_eval/dummy_machine.rs
index 9a98677a844..aa7449e8ad2 100644
--- a/compiler/rustc_const_eval/src/const_eval/dummy_machine.rs
+++ b/compiler/rustc_const_eval/src/const_eval/dummy_machine.rs
@@ -1,14 +1,14 @@
-use crate::interpret::{
-    self, throw_machine_stop, HasStaticRootDefId, ImmTy, Immediate, InterpCx, PointerArithmetic,
-};
 use rustc_middle::mir::interpret::{AllocId, ConstAllocation, InterpResult};
 use rustc_middle::mir::*;
 use rustc_middle::query::TyCtxtAt;
-use rustc_middle::ty;
 use rustc_middle::ty::layout::TyAndLayout;
-use rustc_middle::{bug, span_bug};
+use rustc_middle::{bug, span_bug, ty};
 use rustc_span::def_id::DefId;
 
+use crate::interpret::{
+    self, throw_machine_stop, HasStaticRootDefId, ImmTy, Immediate, InterpCx, PointerArithmetic,
+};
+
 /// Macro for machine-specific `InterpError` without allocation.
 /// (These will never be shown to the user, but they help diagnose ICEs.)
 pub macro throw_machine_stop_str($($tt:tt)*) {{
diff --git a/compiler/rustc_const_eval/src/const_eval/error.rs b/compiler/rustc_const_eval/src/const_eval/error.rs
index b17dc7f3ddd..00bbd9337f7 100644
--- a/compiler/rustc_const_eval/src/const_eval/error.rs
+++ b/compiler/rustc_const_eval/src/const_eval/error.rs
@@ -4,14 +4,15 @@ use rustc_errors::{DiagArgName, DiagArgValue, DiagMessage, Diagnostic, IntoDiagA
 use rustc_middle::mir::interpret::{Provenance, ReportedErrorInfo};
 use rustc_middle::mir::AssertKind;
 use rustc_middle::query::TyCtxtAt;
-use rustc_middle::ty::TyCtxt;
-use rustc_middle::ty::{layout::LayoutError, ConstInt};
+use rustc_middle::ty::layout::LayoutError;
+use rustc_middle::ty::{ConstInt, TyCtxt};
 use rustc_span::{Span, Symbol};
 
 use super::CompileTimeMachine;
 use crate::errors::{self, FrameNote, ReportErrorExt};
-use crate::interpret::{err_inval, err_machine_stop};
-use crate::interpret::{ErrorHandled, Frame, InterpError, InterpErrorInfo, MachineStopType};
+use crate::interpret::{
+    err_inval, err_machine_stop, ErrorHandled, Frame, InterpError, InterpErrorInfo, MachineStopType,
+};
 
 /// The CTFE machine has some custom error kinds.
 #[derive(Clone, Debug)]
@@ -25,8 +26,9 @@ pub enum ConstEvalErrKind {
 
 impl MachineStopType for ConstEvalErrKind {
     fn diagnostic_message(&self) -> DiagMessage {
-        use crate::fluent_generated::*;
         use ConstEvalErrKind::*;
+
+        use crate::fluent_generated::*;
         match self {
             ConstAccessesMutGlobal => const_eval_const_accesses_mut_global,
             ModifiedGlobal => const_eval_modified_global,
diff --git a/compiler/rustc_const_eval/src/const_eval/eval_queries.rs b/compiler/rustc_const_eval/src/const_eval/eval_queries.rs
index d8efaa66415..ba4b80d1026 100644
--- a/compiler/rustc_const_eval/src/const_eval/eval_queries.rs
+++ b/compiler/rustc_const_eval/src/const_eval/eval_queries.rs
@@ -1,8 +1,6 @@
 use std::sync::atomic::Ordering::Relaxed;
 
 use either::{Left, Right};
-use tracing::{debug, instrument, trace};
-
 use rustc_hir::def::DefKind;
 use rustc_middle::bug;
 use rustc_middle::mir::interpret::{AllocId, ErrorHandled, InterpErrorInfo};
@@ -16,17 +14,16 @@ use rustc_session::lint;
 use rustc_span::def_id::LocalDefId;
 use rustc_span::{Span, DUMMY_SP};
 use rustc_target::abi::{self, Abi};
+use tracing::{debug, instrument, trace};
 
 use super::{CanAccessMutGlobal, CompileTimeInterpCx, CompileTimeMachine};
 use crate::const_eval::CheckAlignment;
-use crate::errors::ConstEvalError;
-use crate::errors::{self, DanglingPtrInFinal};
+use crate::errors::{self, ConstEvalError, DanglingPtrInFinal};
 use crate::interpret::{
-    create_static_alloc, intern_const_alloc_recursive, CtfeValidationMode, GlobalId, Immediate,
-    InternKind, InterpCx, InterpError, InterpResult, MPlaceTy, MemoryKind, OpTy, RefTracking,
-    StackPopCleanup,
+    create_static_alloc, eval_nullary_intrinsic, intern_const_alloc_recursive, throw_exhaust,
+    CtfeValidationMode, GlobalId, Immediate, InternKind, InternResult, InterpCx, InterpError,
+    InterpResult, MPlaceTy, MemoryKind, OpTy, RefTracking, StackPopCleanup,
 };
-use crate::interpret::{eval_nullary_intrinsic, throw_exhaust, InternResult};
 use crate::CTRL_C_RECEIVED;
 
 // Returns a pointer to where the result lives
diff --git a/compiler/rustc_const_eval/src/const_eval/fn_queries.rs b/compiler/rustc_const_eval/src/const_eval/fn_queries.rs
index 7acd08e0cce..ca0993f0580 100644
--- a/compiler/rustc_const_eval/src/const_eval/fn_queries.rs
+++ b/compiler/rustc_const_eval/src/const_eval/fn_queries.rs
@@ -1,10 +1,9 @@
-use rustc_attr as attr;
-use rustc_hir as hir;
 use rustc_hir::def::DefKind;
 use rustc_hir::def_id::{DefId, LocalDefId};
 use rustc_middle::query::Providers;
 use rustc_middle::ty::TyCtxt;
 use rustc_span::symbol::Symbol;
+use {rustc_attr as attr, rustc_hir as hir};
 
 /// Whether the `def_id` is an unstable const fn and what feature gate(s) are necessary to enable
 /// it.
diff --git a/compiler/rustc_const_eval/src/const_eval/machine.rs b/compiler/rustc_const_eval/src/const_eval/machine.rs
index 17e1d8566c2..65cbeab24ec 100644
--- a/compiler/rustc_const_eval/src/const_eval/machine.rs
+++ b/compiler/rustc_const_eval/src/const_eval/machine.rs
@@ -4,18 +4,14 @@ use std::hash::Hash;
 use std::ops::ControlFlow;
 
 use rustc_ast::Mutability;
-use rustc_data_structures::fx::FxIndexMap;
-use rustc_data_structures::fx::IndexEntry;
-use rustc_hir::def_id::DefId;
-use rustc_hir::def_id::LocalDefId;
-use rustc_hir::LangItem;
-use rustc_hir::{self as hir, CRATE_HIR_ID};
-use rustc_middle::bug;
-use rustc_middle::mir;
+use rustc_data_structures::fx::{FxIndexMap, IndexEntry};
+use rustc_hir::def_id::{DefId, LocalDefId};
+use rustc_hir::{self as hir, LangItem, CRATE_HIR_ID};
 use rustc_middle::mir::AssertMessage;
 use rustc_middle::query::TyCtxtAt;
 use rustc_middle::ty::layout::{FnAbiOf, TyAndLayout};
 use rustc_middle::ty::{self, TyCtxt};
+use rustc_middle::{bug, mir};
 use rustc_session::lint::builtin::WRITES_THROUGH_IMMUTABLE_POINTER;
 use rustc_span::symbol::{sym, Symbol};
 use rustc_span::Span;
@@ -23,6 +19,7 @@ use rustc_target::abi::{Align, Size};
 use rustc_target::spec::abi::Abi as CallAbi;
 use tracing::debug;
 
+use super::error::*;
 use crate::errors::{LongRunning, LongRunningWarn};
 use crate::fluent_generated as fluent;
 use crate::interpret::{
@@ -31,8 +28,6 @@ use crate::interpret::{
     GlobalAlloc, ImmTy, InterpCx, InterpResult, MPlaceTy, OpTy, Pointer, PointerArithmetic, Scalar,
 };
 
-use super::error::*;
-
 /// When hitting this many interpreted terminators we emit a deny by default lint
 /// that notfies the user that their constant takes a long time to evaluate. If that's
 /// what they intended, they can just allow the lint.
@@ -201,7 +196,8 @@ impl<'tcx> CompileTimeInterpCx<'tcx> {
         let topmost = span.ctxt().outer_expn().expansion_cause().unwrap_or(span);
         let caller = self.tcx.sess.source_map().lookup_char_pos(topmost.lo());
 
-        use rustc_session::{config::RemapPathScopeComponents, RemapFileNameExt};
+        use rustc_session::config::RemapPathScopeComponents;
+        use rustc_session::RemapFileNameExt;
         (
             Symbol::intern(
                 &caller
diff --git a/compiler/rustc_const_eval/src/const_eval/mod.rs b/compiler/rustc_const_eval/src/const_eval/mod.rs
index 3a6dc81eff1..8add23ed22f 100644
--- a/compiler/rustc_const_eval/src/const_eval/mod.rs
+++ b/compiler/rustc_const_eval/src/const_eval/mod.rs
@@ -1,10 +1,9 @@
 // Not in interpret to make sure we do not use private implementation details
 
-use rustc_middle::bug;
-use rustc_middle::mir;
 use rustc_middle::mir::interpret::InterpErrorInfo;
 use rustc_middle::query::{Key, TyCtxtAt};
 use rustc_middle::ty::{self, Ty, TyCtxt};
+use rustc_middle::{bug, mir};
 use rustc_target::abi::VariantIdx;
 use tracing::instrument;
 
diff --git a/compiler/rustc_const_eval/src/const_eval/valtrees.rs b/compiler/rustc_const_eval/src/const_eval/valtrees.rs
index 3bc01510730..8227c045948 100644
--- a/compiler/rustc_const_eval/src/const_eval/valtrees.rs
+++ b/compiler/rustc_const_eval/src/const_eval/valtrees.rs
@@ -1,9 +1,8 @@
 use rustc_data_structures::stack::ensure_sufficient_stack;
-use rustc_middle::bug;
-use rustc_middle::mir;
 use rustc_middle::mir::interpret::{EvalToValTreeResult, GlobalId};
 use rustc_middle::ty::layout::{LayoutCx, LayoutOf, TyAndLayout};
 use rustc_middle::ty::{self, ScalarInt, Ty, TyCtxt};
+use rustc_middle::{bug, mir};
 use rustc_span::DUMMY_SP;
 use rustc_target::abi::{Abi, VariantIdx};
 use tracing::{debug, instrument, trace};
@@ -13,10 +12,9 @@ use super::machine::CompileTimeInterpCx;
 use super::{ValTreeCreationError, ValTreeCreationResult, VALTREE_MAX_NODES};
 use crate::const_eval::CanAccessMutGlobal;
 use crate::errors::MaxNumNodesInConstErr;
-use crate::interpret::MPlaceTy;
 use crate::interpret::{
-    intern_const_alloc_recursive, ImmTy, Immediate, InternKind, MemPlaceMeta, MemoryKind, PlaceTy,
-    Projectable, Scalar,
+    intern_const_alloc_recursive, ImmTy, Immediate, InternKind, MPlaceTy, MemPlaceMeta, MemoryKind,
+    PlaceTy, Projectable, Scalar,
 };
 
 #[instrument(skip(ecx), level = "debug")]
diff --git a/compiler/rustc_const_eval/src/errors.rs b/compiler/rustc_const_eval/src/errors.rs
index 292d6ba9d08..8096ed6d8d0 100644
--- a/compiler/rustc_const_eval/src/errors.rs
+++ b/compiler/rustc_const_eval/src/errors.rs
@@ -1,8 +1,9 @@
 use std::borrow::Cow;
 
 use either::Either;
+use rustc_errors::codes::*;
 use rustc_errors::{
-    codes::*, Diag, DiagArgValue, DiagCtxtHandle, DiagMessage, Diagnostic, EmissionGuarantee, Level,
+    Diag, DiagArgValue, DiagCtxtHandle, DiagMessage, Diagnostic, EmissionGuarantee, Level,
 };
 use rustc_hir::ConstContext;
 use rustc_macros::{Diagnostic, LintDiagnostic, Subdiagnostic};
@@ -468,8 +469,9 @@ fn bad_pointer_message(msg: CheckInAllocMsg, dcx: DiagCtxtHandle<'_>) -> String
 
 impl<'a> ReportErrorExt for UndefinedBehaviorInfo<'a> {
     fn diagnostic_message(&self) -> DiagMessage {
-        use crate::fluent_generated::*;
         use UndefinedBehaviorInfo::*;
+
+        use crate::fluent_generated::*;
         match self {
             Ub(msg) => msg.clone().into(),
             Custom(x) => (x.msg)(),
@@ -630,8 +632,9 @@ impl<'a> ReportErrorExt for UndefinedBehaviorInfo<'a> {
 
 impl<'tcx> ReportErrorExt for ValidationErrorInfo<'tcx> {
     fn diagnostic_message(&self) -> DiagMessage {
-        use crate::fluent_generated::*;
         use rustc_middle::mir::interpret::ValidationErrorKind::*;
+
+        use crate::fluent_generated::*;
         match self.kind {
             PtrToUninhabited { ptr_kind: PointerKind::Box, .. } => {
                 const_eval_validation_box_to_uninhabited
@@ -702,9 +705,10 @@ impl<'tcx> ReportErrorExt for ValidationErrorInfo<'tcx> {
     }
 
     fn add_args<G: EmissionGuarantee>(self, err: &mut Diag<'_, G>) {
-        use crate::fluent_generated as fluent;
         use rustc_middle::mir::interpret::ValidationErrorKind::*;
 
+        use crate::fluent_generated as fluent;
+
         if let PointerAsInt { .. } | PartialPointer = self.kind {
             err.help(fluent::const_eval_ptr_as_bytes_1);
             err.help(fluent::const_eval_ptr_as_bytes_2);
@@ -835,9 +839,9 @@ impl ReportErrorExt for UnsupportedOpInfo {
         }
     }
     fn add_args<G: EmissionGuarantee>(self, diag: &mut Diag<'_, G>) {
-        use crate::fluent_generated::*;
-
         use UnsupportedOpInfo::*;
+
+        use crate::fluent_generated::*;
         if let ReadPointerAsInt(_) | OverwritePartialPointer(_) | ReadPartialPointer(_) = self {
             diag.help(const_eval_ptr_as_bytes_1);
             diag.help(const_eval_ptr_as_bytes_2);
diff --git a/compiler/rustc_const_eval/src/interpret/cast.rs b/compiler/rustc_const_eval/src/interpret/cast.rs
index bd2a5812cfa..b2f07de0ac4 100644
--- a/compiler/rustc_const_eval/src/interpret/cast.rs
+++ b/compiler/rustc_const_eval/src/interpret/cast.rs
@@ -12,11 +12,10 @@ use rustc_target::abi::Integer;
 use rustc_type_ir::TyKind::*;
 use tracing::trace;
 
+use super::util::ensure_monomorphic_enough;
 use super::{
-    err_inval, throw_ub, throw_ub_custom, util::ensure_monomorphic_enough, FnVal, ImmTy, Immediate,
-    InterpCx, Machine, OpTy, PlaceTy,
+    err_inval, throw_ub, throw_ub_custom, FnVal, ImmTy, Immediate, InterpCx, Machine, OpTy, PlaceTy,
 };
-
 use crate::fluent_generated as fluent;
 
 impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
diff --git a/compiler/rustc_const_eval/src/interpret/discriminant.rs b/compiler/rustc_const_eval/src/interpret/discriminant.rs
index 181c7115386..0008a15722b 100644
--- a/compiler/rustc_const_eval/src/interpret/discriminant.rs
+++ b/compiler/rustc_const_eval/src/interpret/discriminant.rs
@@ -1,11 +1,9 @@
 //! Functions for reading and writing discriminants of multi-variant layouts (enums and coroutines).
 
-use rustc_middle::mir;
-use rustc_middle::span_bug;
 use rustc_middle::ty::layout::{LayoutOf, PrimitiveExt};
 use rustc_middle::ty::{self, CoroutineArgsExt, ScalarInt, Ty};
-use rustc_target::abi::{self, TagEncoding};
-use rustc_target::abi::{VariantIdx, Variants};
+use rustc_middle::{mir, span_bug};
+use rustc_target::abi::{self, TagEncoding, VariantIdx, Variants};
 use tracing::{instrument, trace};
 
 use super::{
diff --git a/compiler/rustc_const_eval/src/interpret/eval_context.rs b/compiler/rustc_const_eval/src/interpret/eval_context.rs
index 9fddeec2973..85f9b2341d9 100644
--- a/compiler/rustc_const_eval/src/interpret/eval_context.rs
+++ b/compiler/rustc_const_eval/src/interpret/eval_context.rs
@@ -2,16 +2,14 @@ use std::cell::Cell;
 use std::{fmt, mem};
 
 use either::{Either, Left, Right};
-use rustc_infer::infer::at::ToTrace;
-use rustc_infer::traits::ObligationCause;
-use rustc_trait_selection::traits::ObligationCtxt;
-use tracing::{debug, info, info_span, instrument, trace};
-
 use rustc_errors::DiagCtxtHandle;
-use rustc_hir::{self as hir, def_id::DefId, definitions::DefPathData};
+use rustc_hir::def_id::DefId;
+use rustc_hir::definitions::DefPathData;
+use rustc_hir::{self as hir};
 use rustc_index::IndexVec;
+use rustc_infer::infer::at::ToTrace;
 use rustc_infer::infer::TyCtxtInferExt;
-use rustc_middle::mir;
+use rustc_infer::traits::ObligationCause;
 use rustc_middle::mir::interpret::{
     CtfeProvenance, ErrorHandled, InvalidMetaKind, ReportedErrorInfo,
 };
@@ -21,11 +19,14 @@ use rustc_middle::ty::layout::{
     TyAndLayout,
 };
 use rustc_middle::ty::{self, GenericArgsRef, ParamEnv, Ty, TyCtxt, TypeFoldable, Variance};
-use rustc_middle::{bug, span_bug};
+use rustc_middle::{bug, mir, span_bug};
 use rustc_mir_dataflow::storage::always_storage_live_locals;
 use rustc_session::Limit;
 use rustc_span::Span;
-use rustc_target::abi::{call::FnAbi, Align, HasDataLayout, Size, TargetDataLayout};
+use rustc_target::abi::call::FnAbi;
+use rustc_target::abi::{Align, HasDataLayout, Size, TargetDataLayout};
+use rustc_trait_selection::traits::ObligationCtxt;
+use tracing::{debug, info, info_span, instrument, trace};
 
 use super::{
     err_inval, throw_inval, throw_ub, throw_ub_custom, throw_unsup, GlobalId, Immediate,
@@ -33,9 +34,7 @@ use super::{
     OpTy, Operand, Place, PlaceTy, Pointer, PointerArithmetic, Projectable, Provenance,
     ReturnAction, Scalar,
 };
-use crate::errors;
-use crate::util;
-use crate::{fluent_generated as fluent, ReportErrorExt};
+use crate::{errors, fluent_generated as fluent, util, ReportErrorExt};
 
 pub struct InterpCx<'tcx, M: Machine<'tcx>> {
     /// Stores the `Machine` instance.
diff --git a/compiler/rustc_const_eval/src/interpret/intrinsics.rs b/compiler/rustc_const_eval/src/interpret/intrinsics.rs
index b227565f8f9..c305a57e85a 100644
--- a/compiler/rustc_const_eval/src/interpret/intrinsics.rs
+++ b/compiler/rustc_const_eval/src/interpret/intrinsics.rs
@@ -3,26 +3,21 @@
 //! and miri.
 
 use rustc_hir::def_id::DefId;
-use rustc_middle::ty;
-use rustc_middle::ty::layout::{LayoutOf as _, ValidityRequirement};
-use rustc_middle::ty::GenericArgsRef;
-use rustc_middle::ty::{Ty, TyCtxt};
-use rustc_middle::{
-    bug,
-    mir::{self, BinOp, ConstValue, NonDivergingIntrinsic},
-    ty::layout::TyAndLayout,
-};
+use rustc_middle::mir::{self, BinOp, ConstValue, NonDivergingIntrinsic};
+use rustc_middle::ty::layout::{LayoutOf as _, TyAndLayout, ValidityRequirement};
+use rustc_middle::ty::{GenericArgsRef, Ty, TyCtxt};
+use rustc_middle::{bug, ty};
 use rustc_span::symbol::{sym, Symbol};
 use rustc_target::abi::Size;
 use tracing::trace;
 
+use super::memory::MemoryKind;
+use super::util::ensure_monomorphic_enough;
 use super::{
-    err_inval, err_ub_custom, err_unsup_format, memory::MemoryKind, throw_inval, throw_ub_custom,
-    throw_ub_format, util::ensure_monomorphic_enough, Allocation, CheckInAllocMsg, ConstAllocation,
-    GlobalId, ImmTy, InterpCx, InterpResult, MPlaceTy, Machine, OpTy, Pointer, PointerArithmetic,
-    Provenance, Scalar,
+    err_inval, err_ub_custom, err_unsup_format, throw_inval, throw_ub_custom, throw_ub_format,
+    Allocation, CheckInAllocMsg, ConstAllocation, GlobalId, ImmTy, InterpCx, InterpResult,
+    MPlaceTy, Machine, OpTy, Pointer, PointerArithmetic, Provenance, Scalar,
 };
-
 use crate::fluent_generated as fluent;
 
 /// Directly returns an `Allocation` containing an absolute path representation of the given type.
diff --git a/compiler/rustc_const_eval/src/interpret/machine.rs b/compiler/rustc_const_eval/src/interpret/machine.rs
index 7f2e9ce06a5..a82209514ec 100644
--- a/compiler/rustc_const_eval/src/interpret/machine.rs
+++ b/compiler/rustc_const_eval/src/interpret/machine.rs
@@ -8,10 +8,9 @@ use std::hash::Hash;
 
 use rustc_apfloat::{Float, FloatConvert};
 use rustc_ast::{InlineAsmOptions, InlineAsmTemplatePiece};
-use rustc_middle::mir;
 use rustc_middle::query::TyCtxtAt;
-use rustc_middle::ty;
 use rustc_middle::ty::layout::TyAndLayout;
+use rustc_middle::{mir, ty};
 use rustc_span::def_id::DefId;
 use rustc_span::Span;
 use rustc_target::abi::{Align, Size};
diff --git a/compiler/rustc_const_eval/src/interpret/memory.rs b/compiler/rustc_const_eval/src/interpret/memory.rs
index 36fe8dfdd29..092174a3079 100644
--- a/compiler/rustc_const_eval/src/interpret/memory.rs
+++ b/compiler/rustc_const_eval/src/interpret/memory.rs
@@ -10,8 +10,7 @@ use std::assert_matches::assert_matches;
 use std::borrow::Cow;
 use std::cell::Cell;
 use std::collections::VecDeque;
-use std::fmt;
-use std::ptr;
+use std::{fmt, ptr};
 
 use rustc_ast::Mutability;
 use rustc_data_structures::fx::{FxHashSet, FxIndexMap};
@@ -20,17 +19,15 @@ use rustc_middle::bug;
 use rustc_middle::mir::display_allocation;
 use rustc_middle::ty::{self, Instance, ParamEnv, Ty, TyCtxt};
 use rustc_target::abi::{Align, HasDataLayout, Size};
-
 use tracing::{debug, instrument, trace};
 
-use crate::fluent_generated as fluent;
-
 use super::{
     alloc_range, err_ub, err_ub_custom, throw_ub, throw_ub_custom, throw_unsup, throw_unsup_format,
     AllocBytes, AllocId, AllocMap, AllocRange, Allocation, CheckAlignMsg, CheckInAllocMsg,
     CtfeProvenance, GlobalAlloc, InterpCx, InterpResult, Machine, MayLeak, Misalignment, Pointer,
     PointerArithmetic, Provenance, Scalar,
 };
+use crate::fluent_generated as fluent;
 
 #[derive(Debug, PartialEq, Copy, Clone)]
 pub enum MemoryKind<T> {
diff --git a/compiler/rustc_const_eval/src/interpret/mod.rs b/compiler/rustc_const_eval/src/interpret/mod.rs
index f703c6fbe3e..afa2303e387 100644
--- a/compiler/rustc_const_eval/src/interpret/mod.rs
+++ b/compiler/rustc_const_eval/src/interpret/mod.rs
@@ -18,6 +18,7 @@ mod util;
 mod validity;
 mod visitor;
 
+use eval_context::{from_known_layout, mir_assign_valid_types};
 #[doc(no_inline)]
 pub use rustc_middle::mir::interpret::*; // have all the `interpret` symbols in one place: here
 
@@ -26,20 +27,15 @@ pub use self::intern::{
     intern_const_alloc_for_constprop, intern_const_alloc_recursive, HasStaticRootDefId, InternKind,
     InternResult,
 };
+pub(crate) use self::intrinsics::eval_nullary_intrinsic;
 pub use self::machine::{compile_time_machine, AllocMap, Machine, MayLeak, ReturnAction};
 pub use self::memory::{AllocKind, AllocRef, AllocRefMut, FnVal, Memory, MemoryKind};
+use self::operand::Operand;
 pub use self::operand::{ImmTy, Immediate, OpTy, Readable};
 pub use self::place::{MPlaceTy, MemPlaceMeta, PlaceTy, Writeable};
+use self::place::{MemPlace, Place};
 pub use self::projection::{OffsetMode, Projectable};
 pub use self::terminator::FnArg;
+pub(crate) use self::util::create_static_alloc;
 pub use self::validity::{CtfeValidationMode, RefTracking};
 pub use self::visitor::ValueVisitor;
-
-use self::{
-    operand::Operand,
-    place::{MemPlace, Place},
-};
-
-pub(crate) use self::intrinsics::eval_nullary_intrinsic;
-pub(crate) use self::util::create_static_alloc;
-use eval_context::{from_known_layout, mir_assign_valid_types};
diff --git a/compiler/rustc_const_eval/src/interpret/operand.rs b/compiler/rustc_const_eval/src/interpret/operand.rs
index 0a7e9853763..d4559e1e8c6 100644
--- a/compiler/rustc_const_eval/src/interpret/operand.rs
+++ b/compiler/rustc_const_eval/src/interpret/operand.rs
@@ -4,16 +4,14 @@
 use std::assert_matches::assert_matches;
 
 use either::{Either, Left, Right};
-use tracing::trace;
-
 use rustc_hir::def::Namespace;
 use rustc_middle::mir::interpret::ScalarSizeMismatch;
 use rustc_middle::ty::layout::{HasParamEnv, HasTyCtxt, LayoutOf, TyAndLayout};
 use rustc_middle::ty::print::{FmtPrinter, PrettyPrinter};
 use rustc_middle::ty::{ConstInt, ScalarInt, Ty, TyCtxt};
-use rustc_middle::{bug, span_bug};
-use rustc_middle::{mir, ty};
+use rustc_middle::{bug, mir, span_bug, ty};
 use rustc_target::abi::{self, Abi, HasDataLayout, Size};
+use tracing::trace;
 
 use super::{
     alloc_range, err_ub, from_known_layout, mir_assign_valid_types, throw_ub, CtfeProvenance,
@@ -835,8 +833,9 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
 // Some nodes are used a lot. Make sure they don't unintentionally get bigger.
 #[cfg(target_pointer_width = "64")]
 mod size_asserts {
-    use super::*;
     use rustc_data_structures::static_assert_size;
+
+    use super::*;
     // tidy-alphabetical-start
     static_assert_size!(Immediate, 48);
     static_assert_size!(ImmTy<'_>, 64);
diff --git a/compiler/rustc_const_eval/src/interpret/operator.rs b/compiler/rustc_const_eval/src/interpret/operator.rs
index 2723507397e..684c98f6061 100644
--- a/compiler/rustc_const_eval/src/interpret/operator.rs
+++ b/compiler/rustc_const_eval/src/interpret/operator.rs
@@ -1,11 +1,9 @@
 use either::Either;
-
 use rustc_apfloat::{Float, FloatConvert};
-use rustc_middle::mir;
 use rustc_middle::mir::interpret::{InterpResult, Scalar};
 use rustc_middle::ty::layout::{LayoutOf, TyAndLayout};
 use rustc_middle::ty::{self, FloatTy, ScalarInt};
-use rustc_middle::{bug, span_bug};
+use rustc_middle::{bug, mir, span_bug};
 use rustc_span::symbol::sym;
 use tracing::trace;
 
diff --git a/compiler/rustc_const_eval/src/interpret/place.rs b/compiler/rustc_const_eval/src/interpret/place.rs
index 33c25b746cc..9f79f4c55be 100644
--- a/compiler/rustc_const_eval/src/interpret/place.rs
+++ b/compiler/rustc_const_eval/src/interpret/place.rs
@@ -5,14 +5,12 @@
 use std::assert_matches::assert_matches;
 
 use either::{Either, Left, Right};
-use tracing::{instrument, trace};
-
 use rustc_ast::Mutability;
-use rustc_middle::mir;
 use rustc_middle::ty::layout::{LayoutOf, TyAndLayout};
 use rustc_middle::ty::Ty;
-use rustc_middle::{bug, span_bug};
+use rustc_middle::{bug, mir, span_bug};
 use rustc_target::abi::{Abi, Align, HasDataLayout, Size};
+use tracing::{instrument, trace};
 
 use super::{
     alloc_range, mir_assign_valid_types, throw_ub, AllocRef, AllocRefMut, CheckAlignMsg,
@@ -1034,8 +1032,9 @@ where
 // Some nodes are used a lot. Make sure they don't unintentionally get bigger.
 #[cfg(target_pointer_width = "64")]
 mod size_asserts {
-    use super::*;
     use rustc_data_structures::static_assert_size;
+
+    use super::*;
     // tidy-alphabetical-start
     static_assert_size!(MemPlace, 48);
     static_assert_size!(MemPlaceMeta, 24);
diff --git a/compiler/rustc_const_eval/src/interpret/projection.rs b/compiler/rustc_const_eval/src/interpret/projection.rs
index cfa814c810a..dd8dd21e0e8 100644
--- a/compiler/rustc_const_eval/src/interpret/projection.rs
+++ b/compiler/rustc_const_eval/src/interpret/projection.rs
@@ -10,14 +10,10 @@
 use std::marker::PhantomData;
 use std::ops::Range;
 
-use rustc_middle::mir;
-use rustc_middle::ty;
 use rustc_middle::ty::layout::{LayoutOf, TyAndLayout};
 use rustc_middle::ty::Ty;
-use rustc_middle::{bug, span_bug};
-use rustc_target::abi::Size;
-use rustc_target::abi::{self, VariantIdx};
-
+use rustc_middle::{bug, mir, span_bug, ty};
+use rustc_target::abi::{self, Size, VariantIdx};
 use tracing::{debug, instrument};
 
 use super::{
diff --git a/compiler/rustc_const_eval/src/interpret/step.rs b/compiler/rustc_const_eval/src/interpret/step.rs
index b3124dfdfbc..48433d95c51 100644
--- a/compiler/rustc_const_eval/src/interpret/step.rs
+++ b/compiler/rustc_const_eval/src/interpret/step.rs
@@ -3,13 +3,11 @@
 //! The main entry point is the `step` method.
 
 use either::Either;
-use tracing::{info, instrument, trace};
-
 use rustc_index::IndexSlice;
-use rustc_middle::mir;
 use rustc_middle::ty::layout::LayoutOf;
-use rustc_middle::{bug, span_bug};
+use rustc_middle::{bug, mir, span_bug};
 use rustc_target::abi::{FieldIdx, FIRST_VARIANT};
+use tracing::{info, instrument, trace};
 
 use super::{
     ImmTy, Immediate, InterpCx, InterpResult, Machine, MemPlaceMeta, PlaceTy, Projectable, Scalar,
diff --git a/compiler/rustc_const_eval/src/interpret/terminator.rs b/compiler/rustc_const_eval/src/interpret/terminator.rs
index 56d3dc94104..5de42ab9608 100644
--- a/compiler/rustc_const_eval/src/interpret/terminator.rs
+++ b/compiler/rustc_const_eval/src/interpret/terminator.rs
@@ -1,33 +1,24 @@
 use std::borrow::Cow;
 
 use either::Either;
-use tracing::trace;
-
-use rustc_middle::{
-    bug, mir, span_bug,
-    ty::{
-        self,
-        layout::{FnAbiOf, IntegerExt, LayoutOf, TyAndLayout},
-        AdtDef, Instance, Ty,
-    },
-};
-use rustc_span::{source_map::Spanned, sym};
-use rustc_target::abi::{self, FieldIdx};
-use rustc_target::abi::{
-    call::{ArgAbi, FnAbi, PassMode},
-    Integer,
-};
+use rustc_middle::ty::layout::{FnAbiOf, IntegerExt, LayoutOf, TyAndLayout};
+use rustc_middle::ty::{self, AdtDef, Instance, Ty};
+use rustc_middle::{bug, mir, span_bug};
+use rustc_span::source_map::Spanned;
+use rustc_span::sym;
+use rustc_target::abi::call::{ArgAbi, FnAbi, PassMode};
+use rustc_target::abi::{self, FieldIdx, Integer};
 use rustc_target::spec::abi::Abi;
+use tracing::trace;
 
 use super::{
     throw_ub, throw_ub_custom, throw_unsup_format, CtfeProvenance, FnVal, ImmTy, InterpCx,
     InterpResult, MPlaceTy, Machine, OpTy, PlaceTy, Projectable, Provenance, Scalar,
     StackPopCleanup,
 };
-use crate::{
-    fluent_generated as fluent,
-    interpret::{eval_context::StackPopInfo, ReturnAction},
-};
+use crate::fluent_generated as fluent;
+use crate::interpret::eval_context::StackPopInfo;
+use crate::interpret::ReturnAction;
 
 /// An argment passed to a function.
 #[derive(Clone, Debug)]
diff --git a/compiler/rustc_const_eval/src/interpret/util.rs b/compiler/rustc_const_eval/src/interpret/util.rs
index bbe5e5fe3ed..6f5bcebbbb6 100644
--- a/compiler/rustc_const_eval/src/interpret/util.rs
+++ b/compiler/rustc_const_eval/src/interpret/util.rs
@@ -1,4 +1,5 @@
-use crate::const_eval::{CompileTimeInterpCx, CompileTimeMachine, InterpretationResult};
+use std::ops::ControlFlow;
+
 use rustc_hir::def_id::LocalDefId;
 use rustc_middle::mir;
 use rustc_middle::mir::interpret::{Allocation, InterpResult, Pointer};
@@ -6,10 +7,10 @@ use rustc_middle::ty::layout::TyAndLayout;
 use rustc_middle::ty::{
     self, Ty, TyCtxt, TypeSuperVisitable, TypeVisitable, TypeVisitableExt, TypeVisitor,
 };
-use std::ops::ControlFlow;
 use tracing::debug;
 
 use super::{throw_inval, InterpCx, MPlaceTy, MemPlaceMeta, MemoryKind};
+use crate::const_eval::{CompileTimeInterpCx, CompileTimeMachine, InterpretationResult};
 
 /// Checks whether a type contains generic parameters which must be instantiated.
 ///
diff --git a/compiler/rustc_const_eval/src/interpret/validity.rs b/compiler/rustc_const_eval/src/interpret/validity.rs
index 3dc3e6c8833..3171a888151 100644
--- a/compiler/rustc_const_eval/src/interpret/validity.rs
+++ b/compiler/rustc_const_eval/src/interpret/validity.rs
@@ -9,17 +9,15 @@ use std::hash::Hash;
 use std::num::NonZero;
 
 use either::{Left, Right};
-use tracing::trace;
-
 use hir::def::DefKind;
 use rustc_ast::Mutability;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_hir as hir;
 use rustc_middle::bug;
+use rustc_middle::mir::interpret::ValidationErrorKind::{self, *};
 use rustc_middle::mir::interpret::{
     ExpectedKind, InterpError, InvalidMetaKind, Misalignment, PointerKind, Provenance,
     UnsupportedOpInfo, ValidationErrorInfo,
-    ValidationErrorKind::{self, *},
 };
 use rustc_middle::ty::layout::{LayoutOf, TyAndLayout};
 use rustc_middle::ty::{self, Ty};
@@ -27,11 +25,13 @@ use rustc_span::symbol::{sym, Symbol};
 use rustc_target::abi::{
     Abi, FieldIdx, Scalar as ScalarAbi, Size, VariantIdx, Variants, WrappingRange,
 };
+use tracing::trace;
 
+use super::machine::AllocMap;
 use super::{
-    err_ub, format_interp_error, machine::AllocMap, throw_ub, AllocId, AllocKind, CheckInAllocMsg,
-    GlobalAlloc, ImmTy, Immediate, InterpCx, InterpResult, MPlaceTy, Machine, MemPlaceMeta, OpTy,
-    Pointer, Projectable, Scalar, ValueVisitor,
+    err_ub, format_interp_error, throw_ub, AllocId, AllocKind, CheckInAllocMsg, GlobalAlloc, ImmTy,
+    Immediate, InterpCx, InterpResult, MPlaceTy, Machine, MemPlaceMeta, OpTy, Pointer, Projectable,
+    Scalar, ValueVisitor,
 };
 
 // for the validation errors
diff --git a/compiler/rustc_const_eval/src/interpret/visitor.rs b/compiler/rustc_const_eval/src/interpret/visitor.rs
index 71c057e549b..fd649d608c6 100644
--- a/compiler/rustc_const_eval/src/interpret/visitor.rs
+++ b/compiler/rustc_const_eval/src/interpret/visitor.rs
@@ -1,15 +1,14 @@
 //! Visitor for a run-time value with a given layout: Traverse enums, structs and other compound
 //! types until we arrive at the leaves, with custom handling for primitive types.
 
+use std::num::NonZero;
+
 use rustc_index::IndexVec;
 use rustc_middle::mir::interpret::InterpResult;
 use rustc_middle::ty::{self, Ty};
-use rustc_target::abi::FieldIdx;
-use rustc_target::abi::{FieldsShape, VariantIdx, Variants};
+use rustc_target::abi::{FieldIdx, FieldsShape, VariantIdx, Variants};
 use tracing::trace;
 
-use std::num::NonZero;
-
 use super::{throw_inval, InterpCx, MPlaceTy, Machine, Projectable};
 
 /// How to traverse a value and what to do when we are at the leaves.
diff --git a/compiler/rustc_const_eval/src/lib.rs b/compiler/rustc_const_eval/src/lib.rs
index 50a4d0612cc..780404212c3 100644
--- a/compiler/rustc_const_eval/src/lib.rs
+++ b/compiler/rustc_const_eval/src/lib.rs
@@ -26,8 +26,8 @@ pub mod util;
 use std::sync::atomic::AtomicBool;
 
 pub use errors::ReportErrorExt;
-
-use rustc_middle::{ty, util::Providers};
+use rustc_middle::ty;
+use rustc_middle::util::Providers;
 
 rustc_fluent_macro::fluent_messages! { "../messages.ftl" }
 
diff --git a/compiler/rustc_const_eval/src/util/caller_location.rs b/compiler/rustc_const_eval/src/util/caller_location.rs
index 3b07bee2d9c..eb185bee5c0 100644
--- a/compiler/rustc_const_eval/src/util/caller_location.rs
+++ b/compiler/rustc_const_eval/src/util/caller_location.rs
@@ -1,9 +1,8 @@
 use rustc_hir::LangItem;
-use rustc_middle::bug;
-use rustc_middle::mir;
 use rustc_middle::query::TyCtxtAt;
 use rustc_middle::ty::layout::LayoutOf;
 use rustc_middle::ty::{self, Mutability};
+use rustc_middle::{bug, mir};
 use rustc_span::symbol::Symbol;
 use tracing::trace;
 
diff --git a/compiler/rustc_const_eval/src/util/type_name.rs b/compiler/rustc_const_eval/src/util/type_name.rs
index 01e517250f7..3aa3b3b74e0 100644
--- a/compiler/rustc_const_eval/src/util/type_name.rs
+++ b/compiler/rustc_const_eval/src/util/type_name.rs
@@ -1,13 +1,11 @@
+use std::fmt::Write;
+
 use rustc_data_structures::intern::Interned;
 use rustc_hir::def_id::CrateNum;
 use rustc_hir::definitions::DisambiguatedDefPathData;
 use rustc_middle::bug;
-use rustc_middle::ty::{
-    self,
-    print::{PrettyPrinter, Print, PrintError, Printer},
-    GenericArg, GenericArgKind, Ty, TyCtxt,
-};
-use std::fmt::Write;
+use rustc_middle::ty::print::{PrettyPrinter, Print, PrintError, Printer};
+use rustc_middle::ty::{self, GenericArg, GenericArgKind, Ty, TyCtxt};
 
 struct AbsolutePathPrinter<'tcx> {
     tcx: TyCtxt<'tcx>,