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use TypingEnv when no infcx is available

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the behavior of the type system not only depends on the current
assumptions, but also the currentnphase of the compiler. This is
mostly necessary as we need to decide whether and how to reveal
opaque types. We track this via the `TypingMode`.
This commit is contained in:
lcnr
2024-11-15 13:53:31 +01:00
parent bf6adec108
commit 9cba14b95b
240 changed files with 1739 additions and 1340 deletions
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58
compiler/rustc_const_eval/src/interpret/call.rs
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@@ -215,7 +215,7 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
// Even if `ty` is normalized, the search for the unsized tail will project
// to fields, which can yield non-normalized types. So we need to provide a
// normalization function.
let normalize = |ty| self.tcx.normalize_erasing_regions(self.param_env, ty);
let normalize = |ty| self.tcx.normalize_erasing_regions(self.typing_env(), ty);
ty.ptr_metadata_ty(*self.tcx, normalize)
};
return interp_ok(meta_ty(caller) == meta_ty(callee));
@@ -652,35 +652,35 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
};
// Obtain the underlying trait we are working on, and the adjusted receiver argument.
let (trait_, dyn_ty, adjusted_recv) = if let ty::Dynamic(data, _, ty::DynStar) =
receiver_place.layout.ty.kind()
{
let recv = self.unpack_dyn_star(&receiver_place, data)?;
let (trait_, dyn_ty, adjusted_recv) =
if let ty::Dynamic(data, _, ty::DynStar) = receiver_place.layout.ty.kind() {
let recv = self.unpack_dyn_star(&receiver_place, data)?;
(data.principal(), recv.layout.ty, recv.ptr())
} else {
// Doesn't have to be a `dyn Trait`, but the unsized tail must be `dyn Trait`.
// (For that reason we also cannot use `unpack_dyn_trait`.)
let receiver_tail =
self.tcx.struct_tail_for_codegen(receiver_place.layout.ty, self.param_env);
let ty::Dynamic(receiver_trait, _, ty::Dyn) = receiver_tail.kind() else {
span_bug!(
self.cur_span(),
"dynamic call on non-`dyn` type {}",
receiver_tail
)
(data.principal(), recv.layout.ty, recv.ptr())
} else {
// Doesn't have to be a `dyn Trait`, but the unsized tail must be `dyn Trait`.
// (For that reason we also cannot use `unpack_dyn_trait`.)
let receiver_tail = self
.tcx
.struct_tail_for_codegen(receiver_place.layout.ty, self.typing_env());
let ty::Dynamic(receiver_trait, _, ty::Dyn) = receiver_tail.kind() else {
span_bug!(
self.cur_span(),
"dynamic call on non-`dyn` type {}",
receiver_tail
)
};
assert!(receiver_place.layout.is_unsized());
// Get the required information from the vtable.
let vptr = receiver_place.meta().unwrap_meta().to_pointer(self)?;
let dyn_ty = self.get_ptr_vtable_ty(vptr, Some(receiver_trait))?;
// It might be surprising that we use a pointer as the receiver even if this
// is a by-val case; this works because by-val passing of an unsized `dyn
// Trait` to a function is actually desugared to a pointer.
(receiver_trait.principal(), dyn_ty, receiver_place.ptr())
};
assert!(receiver_place.layout.is_unsized());
// Get the required information from the vtable.
let vptr = receiver_place.meta().unwrap_meta().to_pointer(self)?;
let dyn_ty = self.get_ptr_vtable_ty(vptr, Some(receiver_trait))?;
// It might be surprising that we use a pointer as the receiver even if this
// is a by-val case; this works because by-val passing of an unsized `dyn
// Trait` to a function is actually desugared to a pointer.
(receiver_trait.principal(), dyn_ty, receiver_place.ptr())
};
// Now determine the actual method to call. Usually we use the easy way of just
// looking up the method at index `idx`.
@@ -704,7 +704,7 @@ impl<'tcx, M: Machine<'tcx>> InterpCx<'tcx, M> {
let concrete_method = Instance::expect_resolve_for_vtable(
tcx,
self.param_env,
self.typing_env(),
def_id,
instance.args.rebase_onto(tcx, trait_def_id, concrete_trait_ref.args),
self.cur_span(),