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remove Boxed layout

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Folkert 2023-07-05 18:57:29 +02:00
parent d64930c17f
commit 6d2d65bb1e
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24 changed files with 52 additions and 1377 deletions
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68
crates/compiler/mono/src/drop_specialization.rs
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@ -526,15 +526,6 @@ fn specialize_drops_stmt<'a, 'i>(
&mut incremented_children,
continuation,
),
LayoutRepr::Boxed(_layout) => specialize_boxed(
arena,
layout_interner,
ident_ids,
environment,
&mut incremented_children,
symbol,
continuation,
),
LayoutRepr::Builtin(Builtin::List(layout)) => specialize_list(
arena,
layout_interner,
@ -1059,65 +1050,6 @@ fn specialize_union<'a, 'i>(
}
}
fn specialize_boxed<'a, 'i>(
arena: &'a Bump,
layout_interner: &'i mut STLayoutInterner<'a>,
ident_ids: &'i mut IdentIds,
environment: &mut DropSpecializationEnvironment<'a>,
incremented_children: &mut CountingMap<Child>,
symbol: &Symbol,
continuation: &'a Stmt<'a>,
) -> &'a Stmt<'a> {
let removed = match incremented_children.map.iter().next() {
Some((s, _)) => {
let s = *s;
incremented_children.pop(&s);
Some(s)
}
None => None,
};
let new_continuation =
specialize_drops_stmt(arena, layout_interner, ident_ids, environment, continuation);
match removed {
Some(s) => {
branch_uniqueness(
arena,
ident_ids,
layout_interner,
environment,
*symbol,
// If the symbol is unique:
// - free the box
|_, _, continuation| {
arena.alloc(Stmt::Refcounting(
// we know for sure that the allocation is unique at
// this point. Therefore we can free (or maybe reuse)
// without checking the refcount again.
ModifyRc::Free(*symbol),
continuation,
))
},
// If the symbol is not unique:
// - increment the child
// - decref the box
|_, _, continuation| {
arena.alloc(Stmt::Refcounting(
ModifyRc::Inc(s, 1),
arena.alloc(Stmt::Refcounting(ModifyRc::DecRef(*symbol), continuation)),
))
},
new_continuation,
)
}
None => {
// No known children, keep decrementing the symbol.
arena.alloc(Stmt::Refcounting(ModifyRc::Dec(*symbol), new_continuation))
}
}
}
fn specialize_list<'a, 'i>(
arena: &'a Bump,
layout_interner: &'i mut STLayoutInterner<'a>,