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Fix alignment bug

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Brian Carroll 2021-12-10 14:52:14 +00:00
parent 7b6ba79eee
commit bab8a0b8a0
1 changed files with 6 additions and 3 deletions
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9
compiler/gen_wasm/src/backend.rs
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@ -675,9 +675,12 @@ impl<'a> WasmBackend<'a> {
}
let tag_field_layouts = &tags[tag_id as usize];
let alignment_bytes = Layout::Struct(tag_field_layouts).alignment_bytes(PTR_SIZE);
let tag_id_offset = round_up_to_alignment!(field_offset, alignment_bytes);
let tag_id_align = Align::from(alignment_bytes);
let fields_alignment_bytes =
Layout::Struct(tag_field_layouts).alignment_bytes(PTR_SIZE);
let tag_id_alignment_bytes = union_layout.tag_id_layout().alignment_bytes(PTR_SIZE);
let total_alignment_bytes = fields_alignment_bytes.max(tag_id_alignment_bytes);
let tag_id_offset = round_up_to_alignment!(field_offset, total_alignment_bytes);
let tag_id_align = Align::from(total_alignment_bytes);
match tag_id_align {
Align::Bytes1 | Align::Bytes2 | Align::Bytes4 => {