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implement Box.box and Box.unbox in the dev backend

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Folkert 2023-02-08 13:17:05 +01:00
parent c79ae98d16
commit b022175489
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5 changed files with 191 additions and 33 deletions
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21
crates/compiler/gen_dev/src/lib.rs
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@ -384,6 +384,21 @@ trait Backend<'a> {
self.load_literal_symbols(arguments);
self.tag(sym, arguments, tag_layout, *tag_id);
}
Expr::ExprBox { symbol: value } => {
let element_layout = match self.interner().get(*layout) {
Layout::Boxed(boxed) => boxed,
_ => unreachable!("{:?}", self.interner().dbg(*layout)),
};
self.load_literal_symbols([*value].as_slice());
self.expr_box(*sym, *value, element_layout)
}
Expr::ExprUnbox { symbol: ptr } => {
let element_layout = *layout;
self.load_literal_symbols([*ptr].as_slice());
self.expr_unbox(*sym, *ptr, element_layout)
}
x => todo!("the expression, {:?}", x),
}
}
@ -1147,6 +1162,12 @@ trait Backend<'a> {
tag_id: TagIdIntType,
);
/// load a value from a pointer
fn expr_unbox(&mut self, sym: Symbol, ptr: Symbol, element_layout: InLayout<'a>);
/// store a refcounted value on the heap
fn expr_box(&mut self, sym: Symbol, value: Symbol, element_layout: InLayout<'a>);
/// return_symbol moves a symbol to the correct return location for the backend and adds a jump to the end of the function.
fn return_symbol(&mut self, sym: &Symbol, layout: &InLayout<'a>);