Remove in_band_lifetimes from rustc_const_eval

See rust-lang#91867 for more information.

compiler/rustc_const_eval/src/const_eval/machine.rs

@@ -423,14 +423,14 @@ impl<'mir, 'tcx> interpret::Machine<'mir, 'tcx> for CompileTimeInterpreter<'mir,
     }
 
     #[inline(always)]
-    fn stack(
+    fn stack<'a>(
         ecx: &'a InterpCx<'mir, 'tcx, Self>,
     ) -> &'a [Frame<'mir, 'tcx, Self::PointerTag, Self::FrameExtra>] {
         &ecx.machine.stack
     }
 
     #[inline(always)]
-    fn stack_mut(
+    fn stack_mut<'a>(
         ecx: &'a mut InterpCx<'mir, 'tcx, Self>,
     ) -> &'a mut Vec<Frame<'mir, 'tcx, Self::PointerTag, Self::FrameExtra>> {
         &mut ecx.machine.stack

compiler/rustc_const_eval/src/const_eval/mod.rs

@@ -25,9 +25,9 @@ pub use fn_queries::*;
 pub use machine::*;
 
 pub(crate) fn const_caller_location(
-    tcx: TyCtxt<'tcx>,
+    tcx: TyCtxt<'_>,
     (file, line, col): (Symbol, u32, u32),
-) -> ConstValue<'tcx> {
+) -> ConstValue<'_> {
     trace!("const_caller_location: {}:{}:{}", file, line, col);
     let mut ecx = mk_eval_cx(tcx, DUMMY_SP, ty::ParamEnv::reveal_all(), false);
 

compiler/rustc_const_eval/src/interpret/eval_context.rs

@@ -935,7 +935,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
     }
 
     #[must_use]
-    pub fn dump_place(&'a self, place: Place<M::PointerTag>) -> PlacePrinter<'a, 'mir, 'tcx, M> {
+    pub fn dump_place(&self, place: Place<M::PointerTag>) -> PlacePrinter<'_, 'mir, 'tcx, M> {
         PlacePrinter { ecx: self, place }
     }
 

compiler/rustc_const_eval/src/interpret/intern.rs

@@ -292,14 +292,15 @@ pub enum InternKind {
 /// Any errors here would anyway be turned into `const_err` lints, whereas validation failures
 /// are hard errors.
 #[tracing::instrument(level = "debug", skip(ecx))]
-pub fn intern_const_alloc_recursive<M: CompileTimeMachine<'mir, 'tcx, const_eval::MemoryKind>>(
+pub fn intern_const_alloc_recursive<
+    'mir,
+    'tcx: 'mir,
+    M: CompileTimeMachine<'mir, 'tcx, const_eval::MemoryKind>,
+>(
     ecx: &mut InterpCx<'mir, 'tcx, M>,
     intern_kind: InternKind,
     ret: &MPlaceTy<'tcx>,
-) -> Result<(), ErrorReported>
-where
-    'tcx: 'mir,
-{
+) -> Result<(), ErrorReported> {
     let tcx = ecx.tcx;
     let base_intern_mode = match intern_kind {
         InternKind::Static(mutbl) => InternMode::Static(mutbl),

compiler/rustc_const_eval/src/interpret/intrinsics/type_name.rs

@@ -148,7 +148,7 @@ impl<'tcx> Printer<'tcx> for AbsolutePathPrinter<'tcx> {
     }
 }
 
-impl PrettyPrinter<'tcx> for AbsolutePathPrinter<'tcx> {
+impl<'tcx> PrettyPrinter<'tcx> for AbsolutePathPrinter<'tcx> {
     fn region_should_not_be_omitted(&self, _region: ty::Region<'_>) -> bool {
         false
     }

compiler/rustc_const_eval/src/interpret/machine.rs

@@ -374,12 +374,12 @@ pub trait Machine<'mir, 'tcx>: Sized {
     ) -> InterpResult<'tcx, Frame<'mir, 'tcx, Self::PointerTag, Self::FrameExtra>>;
 
     /// Borrow the current thread's stack.
-    fn stack(
+    fn stack<'a>(
         ecx: &'a InterpCx<'mir, 'tcx, Self>,
     ) -> &'a [Frame<'mir, 'tcx, Self::PointerTag, Self::FrameExtra>];
 
     /// Mutably borrow the current thread's stack.
-    fn stack_mut(
+    fn stack_mut<'a>(
         ecx: &'a mut InterpCx<'mir, 'tcx, Self>,
     ) -> &'a mut Vec<Frame<'mir, 'tcx, Self::PointerTag, Self::FrameExtra>>;
 

compiler/rustc_const_eval/src/interpret/operand.rs

@@ -106,7 +106,7 @@ pub struct ImmTy<'tcx, Tag: Provenance = AllocId> {
 #[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
 rustc_data_structures::static_assert_size!(ImmTy<'_>, 72);
 
-impl<Tag: Provenance> std::fmt::Display for ImmTy<'tcx, Tag> {
+impl<Tag: Provenance> std::fmt::Display for ImmTy<'_, Tag> {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         /// Helper function for printing a scalar to a FmtPrinter
         fn p<'a, 'tcx, F: std::fmt::Write, Tag: Provenance>(

compiler/rustc_const_eval/src/interpret/place.rs

@@ -150,7 +150,7 @@ impl<Tag: Provenance> MemPlace<Tag> {
     }
 
     #[inline]
-    pub fn offset(
+    pub fn offset<'tcx>(
         self,
         offset: Size,
         meta: MemPlaceMeta<Tag>,
@@ -420,7 +420,7 @@ where
 
     // Iterates over all fields of an array. Much more efficient than doing the
     // same by repeatedly calling `mplace_array`.
-    pub(super) fn mplace_array_fields(
+    pub(super) fn mplace_array_fields<'a>(
         &self,
         base: &'a MPlaceTy<'tcx, Tag>,
     ) -> InterpResult<'tcx, impl Iterator<Item = InterpResult<'tcx, MPlaceTy<'tcx, Tag>>> + 'a>

compiler/rustc_const_eval/src/lib.rs

@@ -11,7 +11,6 @@ Rust MIR: a lowered representation of Rust.
 #![feature(crate_visibility_modifier)]
 #![feature(decl_macro)]
 #![feature(exact_size_is_empty)]
-#![feature(in_band_lifetimes)]
 #![feature(iter_zip)]
 #![feature(let_else)]
 #![feature(map_try_insert)]

compiler/rustc_const_eval/src/transform/check_consts/check.rs

@@ -35,7 +35,7 @@ pub struct Qualifs<'mir, 'tcx> {
     needs_non_const_drop: Option<QualifResults<'mir, 'tcx, NeedsNonConstDrop>>,
 }
 
-impl Qualifs<'mir, 'tcx> {
+impl<'mir, 'tcx> Qualifs<'mir, 'tcx> {
     /// Returns `true` if `local` is `NeedsDrop` at the given `Location`.
     ///
     /// Only updates the cursor if absolutely necessary
@@ -185,15 +185,15 @@ pub struct Checker<'mir, 'tcx> {
     secondary_errors: Vec<Diagnostic>,
 }
 
-impl Deref for Checker<'mir, 'tcx> {
+impl<'mir, 'tcx> Deref for Checker<'mir, 'tcx> {
     type Target = ConstCx<'mir, 'tcx>;
 
     fn deref(&self) -> &Self::Target {
         &self.ccx
     }
 }
 
-impl Checker<'mir, 'tcx> {
+impl<'mir, 'tcx> Checker<'mir, 'tcx> {
     pub fn new(ccx: &'mir ConstCx<'mir, 'tcx>) -> Self {
         Checker {
             span: ccx.body.span,
@@ -273,7 +273,7 @@ impl Checker<'mir, 'tcx> {
                 struct StorageDeads {
                     locals: BitSet<Local>,
                 }
-                impl Visitor<'tcx> for StorageDeads {
+                impl<'tcx> Visitor<'tcx> for StorageDeads {
                     fn visit_statement(&mut self, stmt: &Statement<'tcx>, _: Location) {
                         if let StatementKind::StorageDead(l) = stmt.kind {
                             self.locals.insert(l);
@@ -460,7 +460,7 @@ impl Checker<'mir, 'tcx> {
     }
 }
 
-impl Visitor<'tcx> for Checker<'mir, 'tcx> {
+impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
     fn visit_basic_block_data(&mut self, bb: BasicBlock, block: &BasicBlockData<'tcx>) {
         trace!("visit_basic_block_data: bb={:?} is_cleanup={:?}", bb, block.is_cleanup);
 
@@ -1042,7 +1042,7 @@ impl Visitor<'tcx> for Checker<'mir, 'tcx> {
     }
 }
 
-fn place_as_reborrow(
+fn place_as_reborrow<'tcx>(
     tcx: TyCtxt<'tcx>,
     body: &Body<'tcx>,
     place: Place<'tcx>,

compiler/rustc_const_eval/src/transform/check_consts/mod.rs

@@ -28,7 +28,7 @@ pub struct ConstCx<'mir, 'tcx> {
     pub const_kind: Option<hir::ConstContext>,
 }
 
-impl ConstCx<'mir, 'tcx> {
+impl<'mir, 'tcx> ConstCx<'mir, 'tcx> {
     pub fn new(tcx: TyCtxt<'tcx>, body: &'mir mir::Body<'tcx>) -> Self {
         let def_id = body.source.def_id().expect_local();
         let param_env = tcx.param_env(def_id);
@@ -72,11 +72,7 @@ impl ConstCx<'mir, 'tcx> {
     }
 }
 
-pub fn rustc_allow_const_fn_unstable(
-    tcx: TyCtxt<'tcx>,
-    def_id: DefId,
-    feature_gate: Symbol,
-) -> bool {
+pub fn rustc_allow_const_fn_unstable(tcx: TyCtxt<'_>, def_id: DefId, feature_gate: Symbol) -> bool {
     let attrs = tcx.get_attrs(def_id);
     attr::rustc_allow_const_fn_unstable(&tcx.sess, attrs).any(|name| name == feature_gate)
 }
@@ -89,7 +85,7 @@ pub fn rustc_allow_const_fn_unstable(
 // functions can be called in a const-context by users of the stable compiler. "const-stable"
 // functions are subject to more stringent restrictions than "const-unstable" functions: They
 // cannot use unstable features and can only call other "const-stable" functions.
-pub fn is_const_stable_const_fn(tcx: TyCtxt<'tcx>, def_id: DefId) -> bool {
+pub fn is_const_stable_const_fn(tcx: TyCtxt<'_>, def_id: DefId) -> bool {
     use attr::{ConstStability, Stability, StabilityLevel};
 
     // A default body marked const is not const-stable because const