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Auto merge of rust-lang#129261 - tgross35:rollup-xjbvqx7, r=tgross35
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Rollup of 7 pull requests

Successful merges:

 - rust-lang#127679 (Stabilize `raw_ref_op` (RFC 2582))
 - rust-lang#128084 (Suggest adding Result return type for associated method in E0277.)
 - rust-lang#128628 (When deduplicating unreachable blocks, erase the source information.)
 - rust-lang#128902 (doc: std::env::var: Returns None for names with '=' or NUL byte)
 - rust-lang#129048 (Update `crosstool-ng` for loongarch64)
 - rust-lang#129116 (Include a copy of `compiler-rt` source in the `download-ci-llvm` tarball)
 - rust-lang#129208 (Fix order of normalization and recursion in const folding.)

r? `@ghost`
`@rustbot` modify labels: rollup
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bors committed Aug 19, 2024
2 parents 804be74 + 8a513f1 commit e3f909b
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Showing 128 changed files with 381 additions and 363 deletions.
1 change: 0 additions & 1 deletion compiler/rustc_ast_passes/src/feature_gate.rs
Original file line number Diff line number Diff line change
Expand Up @@ -539,7 +539,6 @@ pub fn check_crate(krate: &ast::Crate, sess: &Session, features: &Features) {
}
}
gate_all!(gen_blocks, "gen blocks are experimental");
gate_all!(raw_ref_op, "raw address of syntax is experimental");
gate_all!(const_trait_impl, "const trait impls are experimental");
gate_all!(
half_open_range_patterns_in_slices,
Expand Down
4 changes: 2 additions & 2 deletions compiler/rustc_borrowck/src/def_use.rs
Original file line number Diff line number Diff line change
Expand Up @@ -55,8 +55,8 @@ pub fn categorize(context: PlaceContext) -> Option<DefUse> {
PlaceContext::NonMutatingUse(NonMutatingUseContext::PlaceMention) |
PlaceContext::NonUse(NonUseContext::AscribeUserTy(_)) |

PlaceContext::MutatingUse(MutatingUseContext::AddressOf) |
PlaceContext::NonMutatingUse(NonMutatingUseContext::AddressOf) |
PlaceContext::MutatingUse(MutatingUseContext::RawBorrow) |
PlaceContext::NonMutatingUse(NonMutatingUseContext::RawBorrow) |
PlaceContext::NonMutatingUse(NonMutatingUseContext::Inspect) |
PlaceContext::NonMutatingUse(NonMutatingUseContext::Copy) |
PlaceContext::NonMutatingUse(NonMutatingUseContext::Move) |
Expand Down
2 changes: 1 addition & 1 deletion compiler/rustc_borrowck/src/lib.rs
Original file line number Diff line number Diff line change
Expand Up @@ -1242,7 +1242,7 @@ impl<'mir, 'tcx> MirBorrowckCtxt<'_, 'mir, '_, 'tcx> {
);
}

&Rvalue::AddressOf(mutability, place) => {
&Rvalue::RawPtr(mutability, place) => {
let access_kind = match mutability {
Mutability::Mut => (
Deep,
Expand Down
2 changes: 1 addition & 1 deletion compiler/rustc_borrowck/src/polonius/loan_invalidations.rs
Original file line number Diff line number Diff line change
Expand Up @@ -269,7 +269,7 @@ impl<'cx, 'tcx> LoanInvalidationsGenerator<'cx, 'tcx> {
self.access_place(location, place, access_kind, LocalMutationIsAllowed::No);
}

&Rvalue::AddressOf(mutability, place) => {
&Rvalue::RawPtr(mutability, place) => {
let access_kind = match mutability {
Mutability::Mut => (
Deep,
Expand Down
6 changes: 3 additions & 3 deletions compiler/rustc_borrowck/src/type_check/mod.rs
Original file line number Diff line number Diff line change
Expand Up @@ -756,7 +756,7 @@ impl<'a, 'b, 'tcx> TypeVerifier<'a, 'b, 'tcx> {
PlaceContext::MutatingUse(_) => ty::Invariant,
PlaceContext::NonUse(StorageDead | StorageLive | VarDebugInfo) => ty::Invariant,
PlaceContext::NonMutatingUse(
Inspect | Copy | Move | PlaceMention | SharedBorrow | FakeBorrow | AddressOf
Inspect | Copy | Move | PlaceMention | SharedBorrow | FakeBorrow | RawBorrow
| Projection,
) => ty::Covariant,
PlaceContext::NonUse(AscribeUserTy(variance)) => variance,
Expand Down Expand Up @@ -2468,7 +2468,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
self.check_operand(right, location);
}

Rvalue::AddressOf(..)
Rvalue::RawPtr(..)
| Rvalue::ThreadLocalRef(..)
| Rvalue::Len(..)
| Rvalue::Discriminant(..)
Expand All @@ -2485,7 +2485,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
| Rvalue::ThreadLocalRef(_)
| Rvalue::Repeat(..)
| Rvalue::Ref(..)
| Rvalue::AddressOf(..)
| Rvalue::RawPtr(..)
| Rvalue::Len(..)
| Rvalue::Cast(..)
| Rvalue::ShallowInitBox(..)
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -6,8 +6,7 @@
extern_types,
naked_functions,
thread_local,
repr_simd,
raw_ref_op
repr_simd
)]
#![no_core]
#![allow(dead_code, non_camel_case_types, internal_features)]
Expand Down
2 changes: 1 addition & 1 deletion compiler/rustc_codegen_cranelift/src/analyze.rs
Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,7 @@ pub(crate) fn analyze(fx: &FunctionCx<'_, '_, '_>) -> IndexVec<Local, SsaKind> {
for stmt in bb.statements.iter() {
match &stmt.kind {
Assign(place_and_rval) => match &place_and_rval.1 {
Rvalue::Ref(_, _, place) | Rvalue::AddressOf(_, place) => {
Rvalue::Ref(_, _, place) | Rvalue::RawPtr(_, place) => {
flag_map[place.local] = SsaKind::NotSsa;
}
_ => {}
Expand Down
2 changes: 1 addition & 1 deletion compiler/rustc_codegen_cranelift/src/base.rs
Original file line number Diff line number Diff line change
Expand Up @@ -595,7 +595,7 @@ fn codegen_stmt<'tcx>(
let val = cplace.to_cvalue(fx);
lval.write_cvalue(fx, val)
}
Rvalue::Ref(_, _, place) | Rvalue::AddressOf(_, place) => {
Rvalue::Ref(_, _, place) | Rvalue::RawPtr(_, place) => {
let place = codegen_place(fx, place);
let ref_ = place.place_ref(fx, lval.layout());
lval.write_cvalue(fx, ref_);
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@

#![feature(
no_core, unboxed_closures, start, lang_items, never_type, linkage,
extern_types, thread_local, raw_ref_op
extern_types, thread_local
)]
#![no_core]
#![allow(dead_code, internal_features, non_camel_case_types)]
Expand Down
4 changes: 2 additions & 2 deletions compiler/rustc_codegen_ssa/src/mir/analyze.rs
Original file line number Diff line number Diff line change
Expand Up @@ -220,14 +220,14 @@ impl<'mir, 'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> Visitor<'tcx>
| MutatingUseContext::SetDiscriminant
| MutatingUseContext::AsmOutput
| MutatingUseContext::Borrow
| MutatingUseContext::AddressOf
| MutatingUseContext::RawBorrow
| MutatingUseContext::Projection,
)
| PlaceContext::NonMutatingUse(
NonMutatingUseContext::Inspect
| NonMutatingUseContext::SharedBorrow
| NonMutatingUseContext::FakeBorrow
| NonMutatingUseContext::AddressOf
| NonMutatingUseContext::RawBorrow
| NonMutatingUseContext::Projection,
) => {
self.locals[local] = LocalKind::Memory;
Expand Down
6 changes: 3 additions & 3 deletions compiler/rustc_codegen_ssa/src/mir/rvalue.rs
Original file line number Diff line number Diff line change
Expand Up @@ -584,7 +584,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
mir::Rvalue::CopyForDeref(place) => {
self.codegen_operand(bx, &mir::Operand::Copy(place))
}
mir::Rvalue::AddressOf(mutability, place) => {
mir::Rvalue::RawPtr(mutability, place) => {
let mk_ptr =
move |tcx: TyCtxt<'tcx>, ty: Ty<'tcx>| Ty::new_ptr(tcx, ty, mutability);
self.codegen_place_to_pointer(bx, place, mk_ptr)
Expand Down Expand Up @@ -813,7 +813,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
cg_value.len(bx.cx())
}

/// Codegen an `Rvalue::AddressOf` or `Rvalue::Ref`
/// Codegen an `Rvalue::RawPtr` or `Rvalue::Ref`
fn codegen_place_to_pointer(
&mut self,
bx: &mut Bx,
Expand Down Expand Up @@ -1085,7 +1085,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
}
mir::Rvalue::Ref(..) |
mir::Rvalue::CopyForDeref(..) |
mir::Rvalue::AddressOf(..) |
mir::Rvalue::RawPtr(..) |
mir::Rvalue::Len(..) |
mir::Rvalue::Cast(..) | // (*)
mir::Rvalue::ShallowInitBox(..) | // (*)
Expand Down
10 changes: 5 additions & 5 deletions compiler/rustc_const_eval/src/check_consts/check.rs
Original file line number Diff line number Diff line change
Expand Up @@ -431,13 +431,13 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
return;
}
}
Rvalue::AddressOf(mutbl, place) => {
Rvalue::RawPtr(mutbl, place) => {
if let Some(reborrowed_place_ref) = place_as_reborrow(self.tcx, self.body, place) {
let ctx = match mutbl {
Mutability::Not => {
PlaceContext::NonMutatingUse(NonMutatingUseContext::AddressOf)
PlaceContext::NonMutatingUse(NonMutatingUseContext::RawBorrow)
}
Mutability::Mut => PlaceContext::MutatingUse(MutatingUseContext::AddressOf),
Mutability::Mut => PlaceContext::MutatingUse(MutatingUseContext::RawBorrow),
};
self.visit_local(reborrowed_place_ref.local, ctx, location);
self.visit_projection(reborrowed_place_ref, ctx, location);
Expand Down Expand Up @@ -472,7 +472,7 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
}

Rvalue::Ref(_, BorrowKind::Mut { .. }, place)
| Rvalue::AddressOf(Mutability::Mut, place) => {
| Rvalue::RawPtr(Mutability::Mut, place) => {
// Inside mutable statics, we allow arbitrary mutable references.
// We've allowed `static mut FOO = &mut [elements];` for a long time (the exact
// reasons why are lost to history), and there is no reason to restrict that to
Expand All @@ -493,7 +493,7 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
}

Rvalue::Ref(_, BorrowKind::Shared | BorrowKind::Fake(_), place)
| Rvalue::AddressOf(Mutability::Not, place) => {
| Rvalue::RawPtr(Mutability::Not, place) => {
let borrowed_place_has_mut_interior = qualifs::in_place::<HasMutInterior, _>(
self.ccx,
&mut |local| self.qualifs.has_mut_interior(self.ccx, local, location),
Expand Down
2 changes: 1 addition & 1 deletion compiler/rustc_const_eval/src/check_consts/qualifs.rs
Original file line number Diff line number Diff line change
Expand Up @@ -291,7 +291,7 @@ where
in_operand::<Q, _>(cx, in_local, lhs) || in_operand::<Q, _>(cx, in_local, rhs)
}

Rvalue::Ref(_, _, place) | Rvalue::AddressOf(_, place) => {
Rvalue::Ref(_, _, place) | Rvalue::RawPtr(_, place) => {
// Special-case reborrows to be more like a copy of the reference.
if let Some((place_base, ProjectionElem::Deref)) = place.as_ref().last_projection() {
let base_ty = place_base.ty(cx.body, cx.tcx).ty;
Expand Down
4 changes: 2 additions & 2 deletions compiler/rustc_const_eval/src/check_consts/resolver.rs
Original file line number Diff line number Diff line change
Expand Up @@ -96,7 +96,7 @@ where
}

fn address_of_allows_mutation(&self) -> bool {
// Exact set of permissions granted by AddressOf is undecided. Conservatively assume that
// Exact set of permissions granted by RawPtr is undecided. Conservatively assume that
// it might allow mutation until resolution of #56604.
true
}
Expand Down Expand Up @@ -170,7 +170,7 @@ where
self.super_rvalue(rvalue, location);

match rvalue {
mir::Rvalue::AddressOf(_mt, borrowed_place) => {
mir::Rvalue::RawPtr(_mt, borrowed_place) => {
if !borrowed_place.is_indirect() && self.address_of_allows_mutation() {
let place_ty = borrowed_place.ty(self.ccx.body, self.ccx.tcx).ty;
if Q::in_any_value_of_ty(self.ccx, place_ty) {
Expand Down
2 changes: 1 addition & 1 deletion compiler/rustc_const_eval/src/interpret/step.rs
Original file line number Diff line number Diff line change
Expand Up @@ -234,7 +234,7 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
self.write_immediate(*val, &dest)?;
}

AddressOf(_, place) => {
RawPtr(_, place) => {
// Figure out whether this is an addr_of of an already raw place.
let place_base_raw = if place.is_indirect_first_projection() {
let ty = self.frame().body.local_decls[place.local].ty;
Expand Down
2 changes: 0 additions & 2 deletions compiler/rustc_error_codes/src/error_codes/E0745.md
Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,6 @@ The address of temporary value was taken.
Erroneous code example:

```compile_fail,E0745
# #![feature(raw_ref_op)]
fn temp_address() {
let ptr = &raw const 2; // error!
}
Expand All @@ -15,7 +14,6 @@ In this example, `2` is destroyed right after the assignment, which means that
To avoid this error, first bind the temporary to a named local variable:

```
# #![feature(raw_ref_op)]
fn temp_address() {
let val = 2;
let ptr = &raw const val; // ok!
Expand Down
2 changes: 2 additions & 0 deletions compiler/rustc_feature/src/accepted.rs
Original file line number Diff line number Diff line change
Expand Up @@ -321,6 +321,8 @@ declare_features! (
(accepted, raw_dylib, "1.71.0", Some(58713)),
/// Allows keywords to be escaped for use as identifiers.
(accepted, raw_identifiers, "1.30.0", Some(48589)),
/// Allows `&raw const $place_expr` and `&raw mut $place_expr` expressions.
(accepted, raw_ref_op, "CURRENT_RUSTC_VERSION", Some(64490)),
/// Allows relaxing the coherence rules such that
/// `impl<T> ForeignTrait<LocalType> for ForeignType<T>` is permitted.
(accepted, re_rebalance_coherence, "1.41.0", Some(55437)),
Expand Down
2 changes: 0 additions & 2 deletions compiler/rustc_feature/src/unstable.rs
Original file line number Diff line number Diff line change
Expand Up @@ -565,8 +565,6 @@ declare_features! (
(unstable, precise_capturing, "1.79.0", Some(123432)),
/// Allows macro attributes on expressions, statements and non-inline modules.
(unstable, proc_macro_hygiene, "1.30.0", Some(54727)),
/// Allows `&raw const $place_expr` and `&raw mut $place_expr` expressions.
(unstable, raw_ref_op, "1.41.0", Some(64490)),
/// Makes `&` and `&mut` patterns eat only one layer of references in Rust 2024.
(incomplete, ref_pat_eat_one_layer_2024, "1.79.0", Some(123076)),
/// Makes `&` and `&mut` patterns eat only one layer of references in Rust 2024—structural variant
Expand Down
2 changes: 1 addition & 1 deletion compiler/rustc_hir_typeck/src/cast.rs
Original file line number Diff line number Diff line change
Expand Up @@ -967,7 +967,7 @@ impl<'a, 'tcx> CastCheck<'tcx> {
// need to special-case obtaining a raw pointer
// from a region pointer to a vector.

// Coerce to a raw pointer so that we generate AddressOf in MIR.
// Coerce to a raw pointer so that we generate RawPtr in MIR.
let array_ptr_type = Ty::new_ptr(fcx.tcx, m_expr.ty, m_expr.mutbl);
fcx.coerce(self.expr, self.expr_ty, array_ptr_type, AllowTwoPhase::No, None)
.unwrap_or_else(|_| {
Expand Down
2 changes: 1 addition & 1 deletion compiler/rustc_middle/src/mir/pretty.rs
Original file line number Diff line number Diff line change
Expand Up @@ -1038,7 +1038,7 @@ impl<'tcx> Debug for Rvalue<'tcx> {

CopyForDeref(ref place) => write!(fmt, "deref_copy {place:#?}"),

AddressOf(mutability, ref place) => {
RawPtr(mutability, ref place) => {
write!(fmt, "&raw {mut_str} {place:?}", mut_str = mutability.ptr_str())
}

Expand Down
2 changes: 1 addition & 1 deletion compiler/rustc_middle/src/mir/statement.rs
Original file line number Diff line number Diff line change
Expand Up @@ -423,7 +423,7 @@ impl<'tcx> Rvalue<'tcx> {
| Rvalue::Repeat(_, _)
| Rvalue::Ref(_, _, _)
| Rvalue::ThreadLocalRef(_)
| Rvalue::AddressOf(_, _)
| Rvalue::RawPtr(_, _)
| Rvalue::Len(_)
| Rvalue::Cast(
CastKind::IntToInt
Expand Down
8 changes: 4 additions & 4 deletions compiler/rustc_middle/src/mir/syntax.rs
Original file line number Diff line number Diff line change
Expand Up @@ -1293,14 +1293,14 @@ pub enum Rvalue<'tcx> {
/// nature of this operation?
ThreadLocalRef(DefId),

/// Creates a pointer with the indicated mutability to the place.
/// Creates a raw pointer with the indicated mutability to the place.
///
/// This is generated by pointer casts like `&v as *const _` or raw address of expressions like
/// `&raw v` or `addr_of!(v)`.
/// This is generated by pointer casts like `&v as *const _` or raw borrow expressions like
/// `&raw const v`.
///
/// Like with references, the semantics of this operation are heavily dependent on the aliasing
/// model.
AddressOf(Mutability, Place<'tcx>),
RawPtr(Mutability, Place<'tcx>),

/// Yields the length of the place, as a `usize`.
///
Expand Down
2 changes: 1 addition & 1 deletion compiler/rustc_middle/src/mir/tcx.rs
Original file line number Diff line number Diff line change
Expand Up @@ -170,7 +170,7 @@ impl<'tcx> Rvalue<'tcx> {
let place_ty = place.ty(local_decls, tcx).ty;
Ty::new_ref(tcx, reg, place_ty, bk.to_mutbl_lossy())
}
Rvalue::AddressOf(mutability, ref place) => {
Rvalue::RawPtr(mutability, ref place) => {
let place_ty = place.ty(local_decls, tcx).ty;
Ty::new_ptr(tcx, place_ty, mutability)
}
Expand Down
18 changes: 9 additions & 9 deletions compiler/rustc_middle/src/mir/visit.rs
Original file line number Diff line number Diff line change
Expand Up @@ -682,13 +682,13 @@ macro_rules! make_mir_visitor {
);
}

Rvalue::AddressOf(m, path) => {
Rvalue::RawPtr(m, path) => {
let ctx = match m {
Mutability::Mut => PlaceContext::MutatingUse(
MutatingUseContext::AddressOf
MutatingUseContext::RawBorrow
),
Mutability::Not => PlaceContext::NonMutatingUse(
NonMutatingUseContext::AddressOf
NonMutatingUseContext::RawBorrow
),
};
self.visit_place(path, ctx, location);
Expand Down Expand Up @@ -1299,8 +1299,8 @@ pub enum NonMutatingUseContext {
/// FIXME: do we need to distinguish shallow and deep fake borrows? In fact, do we need to
/// distinguish fake and normal deep borrows?
FakeBorrow,
/// AddressOf for *const pointer.
AddressOf,
/// `&raw const`.
RawBorrow,
/// PlaceMention statement.
///
/// This statement is executed as a check that the `Place` is live without reading from it,
Expand Down Expand Up @@ -1333,8 +1333,8 @@ pub enum MutatingUseContext {
Drop,
/// Mutable borrow.
Borrow,
/// AddressOf for *mut pointer.
AddressOf,
/// `&raw mut`.
RawBorrow,
/// Used as base for another place, e.g., `x` in `x.y`. Could potentially mutate the place.
/// For example, the projection `x.y` is marked as a mutation in these cases:
/// ```ignore (illustrative)
Expand Down Expand Up @@ -1386,8 +1386,8 @@ impl PlaceContext {
pub fn is_address_of(&self) -> bool {
matches!(
self,
PlaceContext::NonMutatingUse(NonMutatingUseContext::AddressOf)
| PlaceContext::MutatingUse(MutatingUseContext::AddressOf)
PlaceContext::NonMutatingUse(NonMutatingUseContext::RawBorrow)
| PlaceContext::MutatingUse(MutatingUseContext::RawBorrow)
)
}

Expand Down
2 changes: 1 addition & 1 deletion compiler/rustc_middle/src/thir.rs
Original file line number Diff line number Diff line change
Expand Up @@ -407,7 +407,7 @@ pub enum ExprKind<'tcx> {
arg: ExprId,
},
/// A `&raw [const|mut] $place_expr` raw borrow resulting in type `*[const|mut] T`.
AddressOf {
RawBorrow {
mutability: hir::Mutability,
arg: ExprId,
},
Expand Down
2 changes: 1 addition & 1 deletion compiler/rustc_middle/src/thir/visit.rs
Original file line number Diff line number Diff line change
Expand Up @@ -92,7 +92,7 @@ pub fn walk_expr<'thir, 'tcx: 'thir, V: Visitor<'thir, 'tcx>>(
}
VarRef { id: _ } | UpvarRef { closure_def_id: _, var_hir_id: _ } => {}
Borrow { arg, borrow_kind: _ } => visitor.visit_expr(&visitor.thir()[arg]),
AddressOf { arg, mutability: _ } => visitor.visit_expr(&visitor.thir()[arg]),
RawBorrow { arg, mutability: _ } => visitor.visit_expr(&visitor.thir()[arg]),
Break { value, label: _ } => {
if let Some(value) = value {
visitor.visit_expr(&visitor.thir()[value])
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -244,8 +244,8 @@ impl<'tcx, 'body> ParseCtxt<'tcx, 'body> {
ExprKind::Borrow { borrow_kind, arg } => Ok(
Rvalue::Ref(self.tcx.lifetimes.re_erased, *borrow_kind, self.parse_place(*arg)?)
),
ExprKind::AddressOf { mutability, arg } => Ok(
Rvalue::AddressOf(*mutability, self.parse_place(*arg)?)
ExprKind::RawBorrow { mutability, arg } => Ok(
Rvalue::RawPtr(*mutability, self.parse_place(*arg)?)
),
ExprKind::Binary { op, lhs, rhs } => Ok(
Rvalue::BinaryOp(*op, Box::new((self.parse_operand(*lhs)?, self.parse_operand(*rhs)?)))
Expand Down
2 changes: 1 addition & 1 deletion compiler/rustc_mir_build/src/build/expr/as_place.rs
Original file line number Diff line number Diff line change
Expand Up @@ -542,7 +542,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
| ExprKind::PointerCoercion { .. }
| ExprKind::Repeat { .. }
| ExprKind::Borrow { .. }
| ExprKind::AddressOf { .. }
| ExprKind::RawBorrow { .. }
| ExprKind::Match { .. }
| ExprKind::If { .. }
| ExprKind::Loop { .. }
Expand Down
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