diff options
Diffstat (limited to 'compiler/rustc_ty_utils/src')
| -rw-r--r-- | compiler/rustc_ty_utils/src/abi.rs | 74 | ||||
| -rw-r--r-- | compiler/rustc_ty_utils/src/ty.rs | 9 |
2 files changed, 44 insertions, 39 deletions
diff --git a/compiler/rustc_ty_utils/src/abi.rs b/compiler/rustc_ty_utils/src/abi.rs index 0ff82f0c256..74ab65b4f58 100644 --- a/compiler/rustc_ty_utils/src/abi.rs +++ b/compiler/rustc_ty_utils/src/abi.rs @@ -309,15 +309,11 @@ fn fn_abi_of_fn_ptr<'tcx>( query: ty::PseudoCanonicalInput<'tcx, (ty::PolyFnSig<'tcx>, &'tcx ty::List<Ty<'tcx>>)>, ) -> Result<&'tcx FnAbi<'tcx, Ty<'tcx>>, &'tcx FnAbiError<'tcx>> { let ty::PseudoCanonicalInput { typing_env, value: (sig, extra_args) } = query; - - let cx = LayoutCx::new(tcx, typing_env); fn_abi_new_uncached( - &cx, + &LayoutCx::new(tcx, typing_env), tcx.instantiate_bound_regions_with_erased(sig), extra_args, None, - None, - false, ) } @@ -326,19 +322,11 @@ fn fn_abi_of_instance<'tcx>( query: ty::PseudoCanonicalInput<'tcx, (ty::Instance<'tcx>, &'tcx ty::List<Ty<'tcx>>)>, ) -> Result<&'tcx FnAbi<'tcx, Ty<'tcx>>, &'tcx FnAbiError<'tcx>> { let ty::PseudoCanonicalInput { typing_env, value: (instance, extra_args) } = query; - - let sig = fn_sig_for_fn_abi(tcx, instance, typing_env); - - let caller_location = - instance.def.requires_caller_location(tcx).then(|| tcx.caller_location_ty()); - fn_abi_new_uncached( &LayoutCx::new(tcx, typing_env), - sig, + fn_sig_for_fn_abi(tcx, instance, typing_env), extra_args, - caller_location, - Some(instance.def_id()), - matches!(instance.def, ty::InstanceKind::Virtual(..)), + Some(instance), ) } @@ -547,19 +535,25 @@ fn fn_abi_sanity_check<'tcx>( fn_arg_sanity_check(cx, fn_abi, spec_abi, &fn_abi.ret); } -// FIXME(eddyb) perhaps group the signature/type-containing (or all of them?) -// arguments of this method, into a separate `struct`. -#[tracing::instrument(level = "debug", skip(cx, caller_location, fn_def_id, force_thin_self_ptr))] +#[tracing::instrument(level = "debug", skip(cx, instance))] fn fn_abi_new_uncached<'tcx>( cx: &LayoutCx<'tcx>, sig: ty::FnSig<'tcx>, extra_args: &[Ty<'tcx>], - caller_location: Option<Ty<'tcx>>, - fn_def_id: Option<DefId>, - // FIXME(eddyb) replace this with something typed, like an `enum`. - force_thin_self_ptr: bool, + instance: Option<ty::Instance<'tcx>>, ) -> Result<&'tcx FnAbi<'tcx, Ty<'tcx>>, &'tcx FnAbiError<'tcx>> { let tcx = cx.tcx(); + let (caller_location, determined_fn_def_id, is_virtual_call) = if let Some(instance) = instance + { + let is_virtual_call = matches!(instance.def, ty::InstanceKind::Virtual(..)); + ( + instance.def.requires_caller_location(tcx).then(|| tcx.caller_location_ty()), + if is_virtual_call { None } else { Some(instance.def_id()) }, + is_virtual_call, + ) + } else { + (None, None, false) + }; let sig = tcx.normalize_erasing_regions(cx.typing_env, sig); let conv = conv_from_spec_abi(cx.tcx(), sig.abi, sig.c_variadic); @@ -568,16 +562,11 @@ fn fn_abi_new_uncached<'tcx>( let extra_args = if sig.abi == ExternAbi::RustCall { assert!(!sig.c_variadic && extra_args.is_empty()); - if let Some(input) = sig.inputs().last() { - if let ty::Tuple(tupled_arguments) = input.kind() { - inputs = &sig.inputs()[0..sig.inputs().len() - 1]; - tupled_arguments - } else { - bug!( - "argument to function with \"rust-call\" ABI \ - is not a tuple" - ); - } + if let Some(input) = sig.inputs().last() + && let ty::Tuple(tupled_arguments) = input.kind() + { + inputs = &sig.inputs()[0..sig.inputs().len() - 1]; + tupled_arguments } else { bug!( "argument to function with \"rust-call\" ABI \ @@ -590,7 +579,7 @@ fn fn_abi_new_uncached<'tcx>( }; let is_drop_in_place = - fn_def_id.is_some_and(|def_id| tcx.is_lang_item(def_id, LangItem::DropInPlace)); + determined_fn_def_id.is_some_and(|def_id| tcx.is_lang_item(def_id, LangItem::DropInPlace)); let arg_of = |ty: Ty<'tcx>, arg_idx: Option<usize>| -> Result<_, &'tcx FnAbiError<'tcx>> { let span = tracing::debug_span!("arg_of"); @@ -603,7 +592,7 @@ fn fn_abi_new_uncached<'tcx>( }); let layout = cx.layout_of(ty).map_err(|err| &*tcx.arena.alloc(FnAbiError::Layout(*err)))?; - let layout = if force_thin_self_ptr && arg_idx == Some(0) { + let layout = if is_virtual_call && arg_idx == Some(0) { // Don't pass the vtable, it's not an argument of the virtual fn. // Instead, pass just the data pointer, but give it the type `*const/mut dyn Trait` // or `&/&mut dyn Trait` because this is special-cased elsewhere in codegen @@ -646,9 +635,22 @@ fn fn_abi_new_uncached<'tcx>( c_variadic: sig.c_variadic, fixed_count: inputs.len() as u32, conv, - can_unwind: fn_can_unwind(cx.tcx(), fn_def_id, sig.abi), + can_unwind: fn_can_unwind( + tcx, + // Since `#[rustc_nounwind]` can change unwinding, we cannot infer unwinding by `fn_def_id` for a virtual call. + determined_fn_def_id, + sig.abi, + ), }; - fn_abi_adjust_for_abi(cx, &mut fn_abi, sig.abi, fn_def_id); + fn_abi_adjust_for_abi( + cx, + &mut fn_abi, + sig.abi, + // If this is a virtual call, we cannot pass the `fn_def_id`, as it might call other + // functions from vtable. Internally, `deduced_param_attrs` attempts to infer attributes by + // visit the function body. + determined_fn_def_id, + ); debug!("fn_abi_new_uncached = {:?}", fn_abi); fn_abi_sanity_check(cx, &fn_abi, sig.abi); Ok(tcx.arena.alloc(fn_abi)) diff --git a/compiler/rustc_ty_utils/src/ty.rs b/compiler/rustc_ty_utils/src/ty.rs index 8ed45b4e541..8610c30ab70 100644 --- a/compiler/rustc_ty_utils/src/ty.rs +++ b/compiler/rustc_ty_utils/src/ty.rs @@ -37,8 +37,6 @@ fn sized_constraint_for_ty<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Option<Ty<' | Never | Dynamic(_, _, ty::DynStar) => None, - UnsafeBinder(_) => todo!(), - // these are never sized Str | Slice(..) | Dynamic(_, _, ty::Dyn) | Foreign(..) => Some(ty), @@ -52,9 +50,14 @@ fn sized_constraint_for_ty<'tcx>(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Option<Ty<' sized_constraint_for_ty(tcx, ty) }), - // these can be sized or unsized + // these can be sized or unsized. Param(..) | Alias(..) | Error(_) => Some(ty), + // We cannot instantiate the binder, so just return the *original* type back, + // but only if the inner type has a sized constraint. Thus we skip the binder, + // but don't actually use the result from `sized_constraint_for_ty`. + UnsafeBinder(inner_ty) => sized_constraint_for_ty(tcx, inner_ty.skip_binder()).map(|_| ty), + Placeholder(..) | Bound(..) | Infer(..) => { bug!("unexpected type `{ty:?}` in sized_constraint_for_ty") } |