| commit | b6bc3e54d03c9873fd20e4330fd64c3a0a1ad47a | [log] [tgz] |
|---|---|---|
| author | Ömer Sinan Ağacan <omersa@google.com> | Tue Mar 05 16:00:39 2024 +0000 |
| committer | Commit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com> | Tue Mar 05 16:00:39 2024 +0000 |
| tree | 168b958d949d631b945dc519e74649ba95dc239e | |
| parent | e923a300dd6a283ad4197ccc5954d02ebcf4f455 [diff] |
[dart2wasm] Refactor and optimize dart2wasm hash map/set types
This CL copies and modifies hash map and set base class `_HashBase`
currently shared with the VM, to improve types of the fields.
The Wasm struct for hash map and set objects was previously:
(type $_HashBase (sub $Object (struct
(field $field0 i32)
(field $field1 (mut i32))
(field $field2 (mut (ref null $Object))) ;; _index
(field $field3 (mut i64))
(field $field4 (mut (ref $Object))) ;; _data
(field $field5 (mut i64))
(field $field6 (mut i64)))))
Now:
(type $_HashBase (sub $Object (struct
(field $field0 i32)
(field $field1 (mut i32))
(field $field2 (mut (ref $Array<WasmI32>))) ;; _index
(field $field3 (mut i64))
(field $field4 (mut (ref $Array<Object?>))) ;; _data
(field $field5 (mut i64))
(field $field6 (mut i64)))))
_index and _data fields are now non-nullable Wasm arrays. This removes
downcasts and one layer of indirection when accessing the elements. In
addition, when accessing `_index` this eliminates unboxing the integers.
Fixes #54961.
Change-Id: I4e6bd5129c7c57f5716ccb23e46060d73ffca217
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/354843
Commit-Queue: Ömer Ağacan <omersa@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
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