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initial implementation

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Folkert 2022-03-08 19:09:42 +01:00
parent b3b3b8790c
commit 92f2927046
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GPG key ID: 1F17F6FFD112B97C
13 changed files with 313 additions and 2 deletions
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11
compiler/mono/src/layout.rs
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@ -250,6 +250,7 @@ pub enum Layout<'a> {
field_order_hash: FieldOrderHash,
field_layouts: &'a [Layout<'a>],
},
Boxed(&'a Layout<'a>),
Union(UnionLayout<'a>),
LambdaSet(LambdaSet<'a>),
RecursivePointer,
@ -997,7 +998,7 @@ impl<'a> Layout<'a> {
}
}
LambdaSet(lambda_set) => lambda_set.runtime_representation().safe_to_memcpy(),
RecursivePointer => {
Boxed(_) | RecursivePointer => {
// We cannot memcpy pointers, because then we would have the same pointer in multiple places!
false
}
@ -1066,6 +1067,7 @@ impl<'a> Layout<'a> {
.runtime_representation()
.stack_size_without_alignment(target_info),
RecursivePointer => target_info.ptr_width() as u32,
Boxed(_) => target_info.ptr_width() as u32,
}
}
@ -1114,6 +1116,7 @@ impl<'a> Layout<'a> {
.alignment_bytes(target_info),
Layout::Builtin(builtin) => builtin.alignment_bytes(target_info),
Layout::RecursivePointer => target_info.ptr_width() as u32,
Layout::Boxed(_) => target_info.ptr_width() as u32,
}
}
@ -1126,6 +1129,7 @@ impl<'a> Layout<'a> {
.runtime_representation()
.allocation_alignment_bytes(target_info),
Layout::RecursivePointer => unreachable!("should be looked up to get an actual layout"),
Layout::Boxed(inner) => inner.allocation_alignment_bytes(target_info),
}
}
@ -1172,6 +1176,7 @@ impl<'a> Layout<'a> {
}
LambdaSet(lambda_set) => lambda_set.runtime_representation().contains_refcounted(),
RecursivePointer => true,
Boxed(_) => true,
}
}
@ -1196,6 +1201,10 @@ impl<'a> Layout<'a> {
Union(union_layout) => union_layout.to_doc(alloc, parens),
LambdaSet(lambda_set) => lambda_set.runtime_representation().to_doc(alloc, parens),
RecursivePointer => alloc.text("*self"),
Boxed(inner) => alloc
.text("Boxed(")
.append(inner.to_doc(alloc, parens))
.append(")"),
}
}