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J.Teeuwissen 2023-04-26 20:25:15 +02:00
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commit b0a4dd3e52
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10
crates/compiler/mono/src/code_gen_help/refcount.rs
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@ -204,6 +204,7 @@ pub fn refcount_reset_proc_body<'a>(
Layout::Union(u) => u, Layout::Union(u) => u,
_ => unimplemented!("Reset is only implemented for UnionLayout"), _ => unimplemented!("Reset is only implemented for UnionLayout"),
}; };
// Whenever we recurse into a child layout we will want to Decrement // Whenever we recurse into a child layout we will want to Decrement
ctx.op = HelperOp::Dec; ctx.op = HelperOp::Dec;
ctx.recursive_union = Some(union_layout); ctx.recursive_union = Some(union_layout);
@ -212,6 +213,7 @@ pub fn refcount_reset_proc_body<'a>(
// Reset structure is unique. Decrement its children and return a pointer to the allocation. // Reset structure is unique. Decrement its children and return a pointer to the allocation.
let then_stmt = { let then_stmt = {
use UnionLayout::*; use UnionLayout::*;
let tag_layouts; let tag_layouts;
let mut null_id = None; let mut null_id = None;
match union_layout { match union_layout {
@ -239,7 +241,9 @@ pub fn refcount_reset_proc_body<'a>(
tag_layouts = root.arena.alloc([other_fields]); tag_layouts = root.arena.alloc([other_fields]);
} }
}; };
let tag_id_layout = union_layout.tag_id_layout(); let tag_id_layout = union_layout.tag_id_layout();
let tag_id_sym = root.create_symbol(ident_ids, "tag_id"); let tag_id_sym = root.create_symbol(ident_ids, "tag_id");
let tag_id_stmt = |next| { let tag_id_stmt = |next| {
Stmt::Let( Stmt::Let(
@ -252,6 +256,7 @@ pub fn refcount_reset_proc_body<'a>(
next, next,
) )
}; };
let rc_contents_stmt = refcount_union_contents( let rc_contents_stmt = refcount_union_contents(
root, root,
ident_ids, ident_ids,
@ -265,11 +270,13 @@ pub fn refcount_reset_proc_body<'a>(
tag_id_layout, tag_id_layout,
Stmt::Ret(addr), Stmt::Ret(addr),
); );
tag_id_stmt(root.arena.alloc( tag_id_stmt(root.arena.alloc(
// //
rc_contents_stmt, rc_contents_stmt,
)) ))
}; };
// Reset structure is not unique. Decrement it and return a NULL pointer. // Reset structure is not unique. Decrement it and return a NULL pointer.
let else_stmt = { let else_stmt = {
let decrement_unit = root.create_symbol(ident_ids, "decrement_unit"); let decrement_unit = root.create_symbol(ident_ids, "decrement_unit");
@ -283,14 +290,17 @@ pub fn refcount_reset_proc_body<'a>(
) )
.unwrap(); .unwrap();
let decrement_stmt = |next| Stmt::Let(decrement_unit, decrement_expr, LAYOUT_UNIT, next); let decrement_stmt = |next| Stmt::Let(decrement_unit, decrement_expr, LAYOUT_UNIT, next);
// Zero // Zero
let zero = root.create_symbol(ident_ids, "zero"); let zero = root.create_symbol(ident_ids, "zero");
let zero_expr = Expr::Literal(Literal::Int(0i128.to_ne_bytes())); let zero_expr = Expr::Literal(Literal::Int(0i128.to_ne_bytes()));
let zero_stmt = |next| Stmt::Let(zero, zero_expr, root.layout_isize, next); let zero_stmt = |next| Stmt::Let(zero, zero_expr, root.layout_isize, next);
// Null pointer with union layout // Null pointer with union layout
let null = root.create_symbol(ident_ids, "null"); let null = root.create_symbol(ident_ids, "null");
let null_stmt = let null_stmt =
|next| let_lowlevel(root.arena, root.layout_isize, null, PtrCast, &[zero], next); |next| let_lowlevel(root.arena, root.layout_isize, null, PtrCast, &[zero], next);
decrement_stmt(root.arena.alloc( decrement_stmt(root.arena.alloc(
// //
zero_stmt(root.arena.alloc( zero_stmt(root.arena.alloc(