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Co-authored-by: Oli Scherer <github35764891676564198441@oli-obk.de>
This commit is contained in:
Daria Sukhonina 2024-06-18 14:28:00 +03:00
parent af10880f6b
commit 1a8eae1aba
2 changed files with 15 additions and 34 deletions
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14
compiler/rustc_codegen_ssa/src/back/symbol_export.rs
View File

@ -470,22 +470,16 @@ fn upstream_drop_glue_for_provider<'tcx>(
tcx: TyCtxt<'tcx>,
args: GenericArgsRef<'tcx>,
) -> Option<CrateNum> {
if let Some(def_id) = tcx.lang_items().drop_in_place_fn() {
tcx.upstream_monomorphizations_for(def_id).and_then(|monos| monos.get(&args).cloned())
} else {
None
}
let def_id = tcx.lang_items().drop_in_place_fn()?;
tcx.upstream_monomorphizations_for(def_id)?.get(&args).cloned()
}
fn upstream_async_drop_glue_for_provider<'tcx>(
tcx: TyCtxt<'tcx>,
args: GenericArgsRef<'tcx>,
) -> Option<CrateNum> {
if let Some(def_id) = tcx.lang_items().async_drop_in_place_fn() {
tcx.upstream_monomorphizations_for(def_id).and_then(|monos| monos.get(&args).cloned())
} else {
None
}
let def_id = tcx.lang_items().async_drop_in_place_fn()?;
tcx.upstream_monomorphizations_for(def_id)?.get(&args).cloned()
}
fn is_unreachable_local_definition_provider(tcx: TyCtxt<'_>, def_id: LocalDefId) -> bool {

35
compiler/rustc_middle/src/ty/instance.rs
View File

@ -314,7 +314,9 @@ pub fn generates_cgu_internal_copy(&self, tcx: TyCtxt<'tcx>) -> bool {
if self.requires_inline(tcx) {
return true;
}
if let ty::InstanceKind::DropGlue(.., Some(ty)) = *self {
if let ty::InstanceKind::DropGlue(.., Some(ty))
| ty::InstanceKind::AsyncDropGlueCtorShim(.., Some(ty)) = *self
{
// Drop glue generally wants to be instantiated at every codegen
// unit, but without an #[inline] hint. We should make this
// available to normal end-users.
@ -329,29 +331,14 @@ pub fn generates_cgu_internal_copy(&self, tcx: TyCtxt<'tcx>) -> bool {
// drops of `Option::None` before LTO. We also respect the intent of
// `#[inline]` on `Drop::drop` implementations.
return ty.ty_adt_def().map_or(true, |adt_def| {
adt_def
.destructor(tcx)
.map_or_else(|| adt_def.is_enum(), |dtor| tcx.cross_crate_inlinable(dtor.did))
});
}
if let ty::InstanceKind::AsyncDropGlueCtorShim(.., Some(ty)) = *self {
// Async drop glue generally wants to be instantiated at
// every codegen unit, but without an #[inline] hint. We
// should make this available to normal end-users.
if tcx.sess.opts.incremental.is_none() {
return true;
}
// When compiling with incremental, we can generate a *lot* of
// codegen units. Including drop glue into all of them has a
// considerable compile time cost.
//
// We include enums without destructors to allow, say, optimizing
// drops of `Option::None` before LTO. We also respect the intent of
// `#[inline]` on `Drop::drop` implementations.
return ty.ty_adt_def().map_or(true, |adt_def| {
adt_def
.async_destructor(tcx)
.map_or_else(|| adt_def.is_enum(), |dtor| tcx.cross_crate_inlinable(dtor.ctor))
match *self {
ty::InstanceKind::DropGlue(..) => adt_def.destructor(tcx).map(|dtor| dtor.did),
ty::InstanceKind::AsyncDropGlueCtorShim(..) => {
adt_def.async_destructor(tcx).map(|dtor| dtor.ctor)
}
_ => unreachable!(),
}
.map_or_else(|| adt_def.is_enum(), |did| tcx.cross_crate_inlinable(did))
});
}
if let ty::InstanceKind::ThreadLocalShim(..) = *self {