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feat(wasm): the beginnings of a real array

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rvcas 2021-12-10 14:44:19 -05:00
parent df9eac196a
commit 6ada59d7a1
2 changed files with 29 additions and 6 deletions
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25
compiler/gen_wasm/src/backend.rs
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@ -626,7 +626,30 @@ impl<'a> WasmBackend<'a> {
}
}
Expr::Array { .. } => todo!("Expression {:?}", expr),
Expr::Array { elems, elem_layout } => {
if let StoredValue::StackMemory { location, .. } = storage {
let (local_id, offset) =
location.local_and_offset(self.storage.stack_frame_pointer);
// TODO: will be passed into roc_alloc
let size = elem_layout.stack_size(PTR_SIZE) * (elems.len() as u32);
self.code_builder.get_local(local_id);
// TODO: we'll need a pointer here actually
// waiting on #2169
self.code_builder.i32_const(0);
self.code_builder.i32_store(Align::Bytes4, offset);
// length of the list
self.code_builder.get_local(local_id);
self.code_builder.i32_const(elems.len() as i32);
self.code_builder.i32_store(Align::Bytes4, offset + 4);
for elem in elems.iter() {}
} else {
internal_error!("Unexpected storage for {:?}", sym)
}
}
Expr::EmptyArray => {
if let StoredValue::StackMemory { location, .. } = storage {