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account for the tag id when doing a memcpy

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Folkert 2023-10-09 17:55:30 +02:00
parent c0d67edfd3
commit beed1e3d6e
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GPG key ID: 1F17F6FFD112B97C
1 changed files with 21 additions and 2 deletions
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23
crates/compiler/gen_dev/src/generic64/mod.rs
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@ -3921,7 +3921,7 @@ impl<
// it's just a null pointer
self.load_literal_i64(sym, 0);
} else {
let (largest_variant, _largest_variant_size) = other_tags
let (largest_variant_fields, _largest_variant_size) = other_tags
.iter()
.map(|fields| {
let struct_layout = self
@ -3936,6 +3936,16 @@ impl<
.max_by(|(_, a), (_, b)| a.cmp(b))
.unwrap();
let largest_variant =
if union_layout.stores_tag_id_as_data(self.storage_manager.target_info) {
self.layout_interner
.insert_direct_no_semantic(LayoutRepr::Struct(
self.env.arena.alloc([largest_variant_fields, Layout::U8]),
))
} else {
largest_variant_fields
};
let other_fields = if tag_id < nullable_id {
other_tags[tag_id as usize]
} else {
@ -4046,7 +4056,7 @@ impl<
let stores_tag_id_as_data =
union_layout.stores_tag_id_as_data(self.storage_manager.target_info);
let (largest_variant, _largest_variant_size) = tags
let (largest_variant_fields, _largest_variant_size) = tags
.iter()
.map(|fields| {
let struct_layout = self
@ -4061,6 +4071,15 @@ impl<
.max_by(|(_, a), (_, b)| a.cmp(b))
.unwrap();
let largest_variant = if stores_tag_id_as_data {
self.layout_interner
.insert_direct_no_semantic(LayoutRepr::Struct(
self.env.arena.alloc([largest_variant_fields, Layout::U8]),
))
} else {
largest_variant_fields
};
// construct the payload as a struct on the stack
let data_struct_layout = self
.layout_interner