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Rename InstanceDef -> InstanceKind
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-421
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53 files changed

+424
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‎compiler/rustc_borrowck/src/diagnostics/mutability_errors.rs

+2-2
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@ use rustc_hir::intravisit::Visitor;
88
use rustc_hir::{self as hir, BindingMode, ByRef, Node};
99
use rustc_middle::bug;
1010
use rustc_middle::mir::{Mutability, Place, PlaceRef, ProjectionElem};
11-
use rustc_middle::ty::{self, InstanceDef, Ty, TyCtxt, Upcast};
11+
use rustc_middle::ty::{self, InstanceKind, Ty, TyCtxt, Upcast};
1212
use rustc_middle::{
1313
hir::place::PlaceBase,
1414
mir::{self, BindingForm, Local, LocalDecl, LocalInfo, LocalKind, Location},
@@ -1020,7 +1020,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
10201020
fn suggest_using_iter_mut(&self, err: &mut Diag<'_>) {
10211021
let source = self.body.source;
10221022
let hir = self.infcx.tcx.hir();
1023-
if let InstanceDef::Item(def_id) = source.instance
1023+
if let InstanceKind::Item(def_id) = source.instance
10241024
&& let Some(Node::Expr(hir::Expr { hir_id, kind, .. })) = hir.get_if_local(def_id)
10251025
&& let ExprKind::Closure(hir::Closure { kind: hir::ClosureKind::Closure, .. }) = kind
10261026
&& let Node::Expr(expr) = self.infcx.tcx.parent_hir_node(*hir_id)

‎compiler/rustc_codegen_cranelift/src/abi/mod.rs

+7-7
Original file line numberDiff line numberDiff line change
@@ -399,7 +399,7 @@ pub(crate) fn codegen_terminator_call<'tcx>(
399399
}
400400

401401
match instance.def {
402-
InstanceDef::Intrinsic(_) => {
402+
InstanceKind::Intrinsic(_) => {
403403
match crate::intrinsics::codegen_intrinsic_call(
404404
fx,
405405
instance,
@@ -412,7 +412,7 @@ pub(crate) fn codegen_terminator_call<'tcx>(
412412
Err(instance) => Some(instance),
413413
}
414414
}
415-
InstanceDef::DropGlue(_, None) | ty::InstanceDef::AsyncDropGlueCtorShim(_, None) => {
415+
InstanceKind::DropGlue(_, None) | ty::InstanceKind::AsyncDropGlueCtorShim(_, None) => {
416416
// empty drop glue - a nop.
417417
let dest = target.expect("Non terminating drop_in_place_real???");
418418
let ret_block = fx.get_block(dest);
@@ -494,7 +494,7 @@ pub(crate) fn codegen_terminator_call<'tcx>(
494494

495495
let (func_ref, first_arg_override) = match instance {
496496
// Trait object call
497-
Some(Instance { def: InstanceDef::Virtual(_, idx), .. }) => {
497+
Some(Instance { def: InstanceKind::Virtual(_, idx), .. }) => {
498498
if fx.clif_comments.enabled() {
499499
let nop_inst = fx.bcx.ins().nop();
500500
fx.add_comment(
@@ -598,7 +598,7 @@ pub(crate) fn codegen_drop<'tcx>(
598598
let ty = drop_place.layout().ty;
599599
let drop_instance = Instance::resolve_drop_in_place(fx.tcx, ty).polymorphize(fx.tcx);
600600

601-
if let ty::InstanceDef::DropGlue(_, None) | ty::InstanceDef::AsyncDropGlueCtorShim(_, None) =
601+
if let ty::InstanceKind::DropGlue(_, None) | ty::InstanceKind::AsyncDropGlueCtorShim(_, None) =
602602
drop_instance.def
603603
{
604604
// we don't actually need to drop anything
@@ -630,7 +630,7 @@ pub(crate) fn codegen_drop<'tcx>(
630630
// FIXME(eddyb) perhaps move some of this logic into
631631
// `Instance::resolve_drop_in_place`?
632632
let virtual_drop = Instance {
633-
def: ty::InstanceDef::Virtual(drop_instance.def_id(), 0),
633+
def: ty::InstanceKind::Virtual(drop_instance.def_id(), 0),
634634
args: drop_instance.args,
635635
};
636636
let fn_abi =
@@ -673,7 +673,7 @@ pub(crate) fn codegen_drop<'tcx>(
673673
fx.bcx.switch_to_block(continued);
674674

675675
let virtual_drop = Instance {
676-
def: ty::InstanceDef::Virtual(drop_instance.def_id(), 0),
676+
def: ty::InstanceKind::Virtual(drop_instance.def_id(), 0),
677677
args: drop_instance.args,
678678
};
679679
let fn_abi =
@@ -684,7 +684,7 @@ pub(crate) fn codegen_drop<'tcx>(
684684
fx.bcx.ins().call_indirect(sig, drop_fn, &[data]);
685685
}
686686
_ => {
687-
assert!(!matches!(drop_instance.def, InstanceDef::Virtual(_, _)));
687+
assert!(!matches!(drop_instance.def, InstanceKind::Virtual(_, _)));
688688

689689
let fn_abi =
690690
RevealAllLayoutCx(fx.tcx).fn_abi_of_instance(drop_instance, ty::List::empty());

‎compiler/rustc_codegen_cranelift/src/constant.rs

+1-1
Original file line numberDiff line numberDiff line change
@@ -50,7 +50,7 @@ pub(crate) fn codegen_tls_ref<'tcx>(
5050
) -> CValue<'tcx> {
5151
let tls_ptr = if !def_id.is_local() && fx.tcx.needs_thread_local_shim(def_id) {
5252
let instance = ty::Instance {
53-
def: ty::InstanceDef::ThreadLocalShim(def_id),
53+
def: ty::InstanceKind::ThreadLocalShim(def_id),
5454
args: ty::GenericArgs::empty(),
5555
};
5656
let func_ref = fx.get_function_ref(instance);

‎compiler/rustc_codegen_cranelift/src/intrinsics/mod.rs

+1-1
Original file line numberDiff line numberDiff line change
@@ -1261,7 +1261,7 @@ fn codegen_regular_intrinsic_call<'tcx>(
12611261
}
12621262

12631263
// Unimplemented intrinsics must have a fallback body. The fallback body is obtained
1264-
// by converting the `InstanceDef::Intrinsic` to an `InstanceDef::Item`.
1264+
// by converting the `InstanceKind::Intrinsic` to an `InstanceKind::Item`.
12651265
_ => {
12661266
let intrinsic = fx.tcx.intrinsic(instance.def_id()).unwrap();
12671267
if intrinsic.must_be_overridden {

‎compiler/rustc_codegen_cranelift/src/lib.rs

+1-1
Original file line numberDiff line numberDiff line change
@@ -98,7 +98,7 @@ mod prelude {
9898
pub(crate) use rustc_middle::mir::{self, *};
9999
pub(crate) use rustc_middle::ty::layout::{LayoutOf, TyAndLayout};
100100
pub(crate) use rustc_middle::ty::{
101-
self, FloatTy, Instance, InstanceDef, IntTy, ParamEnv, Ty, TyCtxt, UintTy,
101+
self, FloatTy, Instance, InstanceKind, IntTy, ParamEnv, Ty, TyCtxt, UintTy,
102102
};
103103
pub(crate) use rustc_span::Span;
104104
pub(crate) use rustc_target::abi::{Abi, FieldIdx, Scalar, Size, VariantIdx, FIRST_VARIANT};

‎compiler/rustc_codegen_ssa/src/back/symbol_export.rs

+5-5
Original file line numberDiff line numberDiff line change
@@ -310,7 +310,7 @@ fn exported_symbols_provider_local(
310310

311311
if tcx.sess.opts.share_generics() && tcx.local_crate_exports_generics() {
312312
use rustc_middle::mir::mono::{Linkage, MonoItem, Visibility};
313-
use rustc_middle::ty::InstanceDef;
313+
use rustc_middle::ty::InstanceKind;
314314

315315
// Normally, we require that shared monomorphizations are not hidden,
316316
// because if we want to re-use a monomorphization from a Rust dylib, it
@@ -337,7 +337,7 @@ fn exported_symbols_provider_local(
337337
}
338338

339339
match *mono_item {
340-
MonoItem::Fn(Instance { def: InstanceDef::Item(def), args }) => {
340+
MonoItem::Fn(Instance { def: InstanceKind::Item(def), args }) => {
341341
if args.non_erasable_generics(tcx, def).next().is_some() {
342342
let symbol = ExportedSymbol::Generic(def, args);
343343
symbols.push((
@@ -350,7 +350,7 @@ fn exported_symbols_provider_local(
350350
));
351351
}
352352
}
353-
MonoItem::Fn(Instance { def: InstanceDef::DropGlue(def_id, Some(ty)), args }) => {
353+
MonoItem::Fn(Instance { def: InstanceKind::DropGlue(def_id, Some(ty)), args }) => {
354354
// A little sanity-check
355355
debug_assert_eq!(
356356
args.non_erasable_generics(tcx, def_id).next(),
@@ -366,7 +366,7 @@ fn exported_symbols_provider_local(
366366
));
367367
}
368368
MonoItem::Fn(Instance {
369-
def: InstanceDef::AsyncDropGlueCtorShim(def_id, Some(ty)),
369+
def: InstanceKind::AsyncDropGlueCtorShim(def_id, Some(ty)),
370370
args,
371371
}) => {
372372
// A little sanity-check
@@ -556,7 +556,7 @@ pub fn symbol_name_for_instance_in_crate<'tcx>(
556556
rustc_symbol_mangling::symbol_name_for_instance_in_crate(
557557
tcx,
558558
ty::Instance {
559-
def: ty::InstanceDef::ThreadLocalShim(def_id),
559+
def: ty::InstanceKind::ThreadLocalShim(def_id),
560560
args: ty::GenericArgs::empty(),
561561
},
562562
instantiating_crate,

‎compiler/rustc_codegen_ssa/src/mir/block.rs

+6-6
Original file line numberDiff line numberDiff line change
@@ -510,7 +510,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
510510
let ty = self.monomorphize(ty);
511511
let drop_fn = Instance::resolve_drop_in_place(bx.tcx(), ty);
512512

513-
if let ty::InstanceDef::DropGlue(_, None) = drop_fn.def {
513+
if let ty::InstanceKind::DropGlue(_, None) = drop_fn.def {
514514
// we don't actually need to drop anything.
515515
return helper.funclet_br(self, bx, target, mergeable_succ);
516516
}
@@ -541,7 +541,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
541541
// \-------/
542542
//
543543
let virtual_drop = Instance {
544-
def: ty::InstanceDef::Virtual(drop_fn.def_id(), 0), // idx 0: the drop function
544+
def: ty::InstanceKind::Virtual(drop_fn.def_id(), 0), // idx 0: the drop function
545545
args: drop_fn.args,
546546
};
547547
debug!("ty = {:?}", ty);
@@ -583,7 +583,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
583583
//
584584
// SO THEN WE CAN USE THE ABOVE CODE.
585585
let virtual_drop = Instance {
586-
def: ty::InstanceDef::Virtual(drop_fn.def_id(), 0), // idx 0: the drop function
586+
def: ty::InstanceKind::Virtual(drop_fn.def_id(), 0), // idx 0: the drop function
587587
args: drop_fn.args,
588588
};
589589
debug!("ty = {:?}", ty);
@@ -855,7 +855,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
855855
let def = instance.map(|i| i.def);
856856

857857
if let Some(
858-
ty::InstanceDef::DropGlue(_, None) | ty::InstanceDef::AsyncDropGlueCtorShim(_, None),
858+
ty::InstanceKind::DropGlue(_, None) | ty::InstanceKind::AsyncDropGlueCtorShim(_, None),
859859
) = def
860860
{
861861
// Empty drop glue; a no-op.
@@ -871,7 +871,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
871871

872872
// Handle intrinsics old codegen wants Expr's for, ourselves.
873873
let intrinsic = match def {
874-
Some(ty::InstanceDef::Intrinsic(def_id)) => Some(bx.tcx().intrinsic(def_id).unwrap()),
874+
Some(ty::InstanceKind::Intrinsic(def_id)) => Some(bx.tcx().intrinsic(def_id).unwrap()),
875875
_ => None,
876876
};
877877

@@ -1026,7 +1026,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
10261026
'make_args: for (i, arg) in first_args.iter().enumerate() {
10271027
let mut op = self.codegen_operand(bx, &arg.node);
10281028

1029-
if let (0, Some(ty::InstanceDef::Virtual(_, idx))) = (i, def) {
1029+
if let (0, Some(ty::InstanceKind::Virtual(_, idx))) = (i, def) {
10301030
match op.val {
10311031
Pair(data_ptr, meta) => {
10321032
// In the case of Rc<Self>, we need to explicitly pass a

‎compiler/rustc_codegen_ssa/src/mir/rvalue.rs

+1-1
Original file line numberDiff line numberDiff line change
@@ -704,7 +704,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
704704
let static_ = if !def_id.is_local() && bx.cx().tcx().needs_thread_local_shim(def_id)
705705
{
706706
let instance = ty::Instance {
707-
def: ty::InstanceDef::ThreadLocalShim(def_id),
707+
def: ty::InstanceKind::ThreadLocalShim(def_id),
708708
args: ty::GenericArgs::empty(),
709709
};
710710
let fn_ptr = bx.get_fn_addr(instance);

‎compiler/rustc_const_eval/src/check_consts/check.rs

+2-2
Original file line numberDiff line numberDiff line change
@@ -10,7 +10,7 @@ use rustc_middle::mir::visit::{MutatingUseContext, NonMutatingUseContext, PlaceC
1010
use rustc_middle::mir::*;
1111
use rustc_middle::span_bug;
1212
use rustc_middle::ty::{self, adjustment::PointerCoercion, Ty, TyCtxt};
13-
use rustc_middle::ty::{Instance, InstanceDef, TypeVisitableExt};
13+
use rustc_middle::ty::{Instance, InstanceKind, TypeVisitableExt};
1414
use rustc_mir_dataflow::Analysis;
1515
use rustc_span::{sym, Span, Symbol, DUMMY_SP};
1616
use rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt as _;
@@ -769,7 +769,7 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
769769

770770
if let Ok(Some(instance)) =
771771
Instance::resolve(tcx, param_env, callee, fn_args)
772-
&& let InstanceDef::Item(def) = instance.def
772+
&& let InstanceKind::Item(def) = instance.def
773773
{
774774
// Resolve a trait method call to its concrete implementation, which may be in a
775775
// `const` trait impl. This is only used for the const stability check below, since

‎compiler/rustc_const_eval/src/const_eval/eval_queries.rs

+1-1
Original file line numberDiff line numberDiff line change
@@ -289,7 +289,7 @@ pub fn eval_to_const_value_raw_provider<'tcx>(
289289

290290
// We call `const_eval` for zero arg intrinsics, too, in order to cache their value.
291291
// Catch such calls and evaluate them instead of trying to load a constant's MIR.
292-
if let ty::InstanceDef::Intrinsic(def_id) = key.value.instance.def {
292+
if let ty::InstanceKind::Intrinsic(def_id) = key.value.instance.def {
293293
let ty = key.value.instance.ty(tcx, key.param_env);
294294
let ty::FnDef(_, args) = ty.kind() else {
295295
bug!("intrinsic with type {:?}", ty);

‎compiler/rustc_const_eval/src/const_eval/machine.rs

+4-4
Original file line numberDiff line numberDiff line change
@@ -398,10 +398,10 @@ impl<'tcx> interpret::Machine<'tcx> for CompileTimeMachine<'tcx> {
398398

399399
fn load_mir(
400400
ecx: &InterpCx<'tcx, Self>,
401-
instance: ty::InstanceDef<'tcx>,
401+
instance: ty::InstanceKind<'tcx>,
402402
) -> InterpResult<'tcx, &'tcx mir::Body<'tcx>> {
403403
match instance {
404-
ty::InstanceDef::Item(def) => Ok(ecx.tcx.mir_for_ctfe(def)),
404+
ty::InstanceKind::Item(def) => Ok(ecx.tcx.mir_for_ctfe(def)),
405405
_ => Ok(ecx.tcx.instance_mir(instance)),
406406
}
407407
}
@@ -424,7 +424,7 @@ impl<'tcx> interpret::Machine<'tcx> for CompileTimeMachine<'tcx> {
424424
};
425425

426426
// Only check non-glue functions
427-
if let ty::InstanceDef::Item(def) = instance.def {
427+
if let ty::InstanceKind::Item(def) = instance.def {
428428
// Execution might have wandered off into other crates, so we cannot do a stability-
429429
// sensitive check here. But we can at least rule out functions that are not const at
430430
// all. That said, we have to allow calling functions inside a trait marked with
@@ -540,7 +540,7 @@ impl<'tcx> interpret::Machine<'tcx> for CompileTimeMachine<'tcx> {
540540
);
541541
}
542542
return Ok(Some(ty::Instance {
543-
def: ty::InstanceDef::Item(instance.def_id()),
543+
def: ty::InstanceKind::Item(instance.def_id()),
544544
args: instance.args,
545545
}));
546546
}

‎compiler/rustc_const_eval/src/interpret/eval_context.rs

+1-1
Original file line numberDiff line numberDiff line change
@@ -562,7 +562,7 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
562562

563563
pub fn load_mir(
564564
&self,
565-
instance: ty::InstanceDef<'tcx>,
565+
instance: ty::InstanceKind<'tcx>,
566566
promoted: Option<mir::Promoted>,
567567
) -> InterpResult<'tcx, &'tcx mir::Body<'tcx>> {
568568
trace!("load mir(instance={:?}, promoted={:?})", instance, promoted);

‎compiler/rustc_const_eval/src/interpret/machine.rs

+1-1
Original file line numberDiff line numberDiff line change
@@ -177,7 +177,7 @@ pub trait Machine<'tcx>: Sized {
177177
/// constants, ...
178178
fn load_mir(
179179
ecx: &InterpCx<'tcx, Self>,
180-
instance: ty::InstanceDef<'tcx>,
180+
instance: ty::InstanceKind<'tcx>,
181181
) -> InterpResult<'tcx, &'tcx mir::Body<'tcx>> {
182182
Ok(ecx.tcx.instance_mir(instance))
183183
}

‎compiler/rustc_const_eval/src/interpret/terminator.rs

+18-18
Original file line numberDiff line numberDiff line change
@@ -175,7 +175,7 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
175175
Drop { place, target, unwind, replace: _ } => {
176176
let place = self.eval_place(place)?;
177177
let instance = Instance::resolve_drop_in_place(*self.tcx, place.layout.ty);
178-
if let ty::InstanceDef::DropGlue(_, None) = instance.def {
178+
if let ty::InstanceKind::DropGlue(_, None) = instance.def {
179179
// This is the branch we enter if and only if the dropped type has no drop glue
180180
// whatsoever. This can happen as a result of monomorphizing a drop of a
181181
// generic. In order to make sure that generic and non-generic code behaves
@@ -550,7 +550,7 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
550550
};
551551

552552
match instance.def {
553-
ty::InstanceDef::Intrinsic(def_id) => {
553+
ty::InstanceKind::Intrinsic(def_id) => {
554554
assert!(self.tcx.intrinsic(def_id).is_some());
555555
// FIXME: Should `InPlace` arguments be reset to uninit?
556556
if let Some(fallback) = M::call_intrinsic(
@@ -562,7 +562,7 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
562562
unwind,
563563
)? {
564564
assert!(!self.tcx.intrinsic(fallback.def_id()).unwrap().must_be_overridden);
565-
assert!(matches!(fallback.def, ty::InstanceDef::Item(_)));
565+
assert!(matches!(fallback.def, ty::InstanceKind::Item(_)));
566566
return self.eval_fn_call(
567567
FnVal::Instance(fallback),
568568
(caller_abi, caller_fn_abi),
@@ -576,18 +576,18 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
576576
Ok(())
577577
}
578578
}
579-
ty::InstanceDef::VTableShim(..)
580-
| ty::InstanceDef::ReifyShim(..)
581-
| ty::InstanceDef::ClosureOnceShim { .. }
582-
| ty::InstanceDef::ConstructCoroutineInClosureShim { .. }
583-
| ty::InstanceDef::CoroutineKindShim { .. }
584-
| ty::InstanceDef::FnPtrShim(..)
585-
| ty::InstanceDef::DropGlue(..)
586-
| ty::InstanceDef::CloneShim(..)
587-
| ty::InstanceDef::FnPtrAddrShim(..)
588-
| ty::InstanceDef::ThreadLocalShim(..)
589-
| ty::InstanceDef::AsyncDropGlueCtorShim(..)
590-
| ty::InstanceDef::Item(_) => {
579+
ty::InstanceKind::VTableShim(..)
580+
| ty::InstanceKind::ReifyShim(..)
581+
| ty::InstanceKind::ClosureOnceShim { .. }
582+
| ty::InstanceKind::ConstructCoroutineInClosureShim { .. }
583+
| ty::InstanceKind::CoroutineKindShim { .. }
584+
| ty::InstanceKind::FnPtrShim(..)
585+
| ty::InstanceKind::DropGlue(..)
586+
| ty::InstanceKind::CloneShim(..)
587+
| ty::InstanceKind::FnPtrAddrShim(..)
588+
| ty::InstanceKind::ThreadLocalShim(..)
589+
| ty::InstanceKind::AsyncDropGlueCtorShim(..)
590+
| ty::InstanceKind::Item(_) => {
591591
// We need MIR for this fn
592592
let Some((body, instance)) = M::find_mir_or_eval_fn(
593593
self,
@@ -786,9 +786,9 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
786786
Ok(()) => Ok(()),
787787
}
788788
}
789-
// `InstanceDef::Virtual` does not have callable MIR. Calls to `Virtual` instances must be
789+
// `InstanceKind::Virtual` does not have callable MIR. Calls to `Virtual` instances must be
790790
// codegen'd / interpreted as virtual calls through the vtable.
791-
ty::InstanceDef::Virtual(def_id, idx) => {
791+
ty::InstanceKind::Virtual(def_id, idx) => {
792792
let mut args = args.to_vec();
793793
// We have to implement all "object safe receivers". So we have to go search for a
794794
// pointer or `dyn Trait` type, but it could be wrapped in newtypes. So recursively
@@ -965,7 +965,7 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
965965
let place = self.force_allocation(place)?;
966966

967967
// We behave a bit different from codegen here.
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// Codegen creates an `InstanceDef::Virtual` with index 0 (the slot of the drop method) and
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// Codegen creates an `InstanceKind::Virtual` with index 0 (the slot of the drop method) and
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// then dispatches that to the normal call machinery. However, our call machinery currently
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// only supports calling `VtblEntry::Method`; it would choke on a `MetadataDropInPlace`. So
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// instead we do the virtual call stuff ourselves. It's easier here than in `eval_fn_call`

‎compiler/rustc_const_eval/src/interpret/util.rs

+1-1
Original file line numberDiff line numberDiff line change
@@ -44,7 +44,7 @@ where
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| ty::CoroutineClosure(def_id, args, ..)
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| ty::Coroutine(def_id, args, ..)
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| ty::FnDef(def_id, args) => {
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let instance = ty::InstanceDef::Item(def_id);
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let instance = ty::InstanceKind::Item(def_id);
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let unused_params = self.tcx.unused_generic_params(instance);
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for (index, arg) in args.into_iter().enumerate() {
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let index = index

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