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use UnionTags for recursive tag unions

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Folkert 2021-08-12 20:50:33 +02:00
parent e86cc22024
commit 3bbf1a5506
7 changed files with 183 additions and 90 deletions
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16
compiler/mono/src/layout.rs
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@ -1299,8 +1299,22 @@ fn layout_from_flat_type<'a>(
let rec_var = subs.get_root_key_without_compacting(rec_var);
let mut tag_layouts = Vec::with_capacity_in(tags.len(), arena);
let mut new_tags = MutMap::default();
for (tag_index, index) in tags.iter_all() {
let tag = subs[tag_index].clone();
let slice = subs[index];
let mut new_vars = std::vec::Vec::new();
for var_index in slice {
let var = subs[var_index];
new_vars.push(var);
}
new_tags.insert(tag, new_vars);
}
// VERY IMPORTANT: sort the tags
let mut tags_vec: std::vec::Vec<_> = tags.into_iter().collect();
let mut tags_vec: std::vec::Vec<_> = new_tags.into_iter().collect();
tags_vec.sort();
let mut nullable = None;